]> 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: read link specific sysctl value
[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"
8e1ad1ea 23#include "networkd-lldp-tx.h"
23f53b99 24#include "networkd-manager.h"
1e7a0e21 25#include "networkd-ndisc.h"
e4a71bf3 26#include "networkd-neighbor.h"
7465dd22 27#include "networkd-radv.h"
bce67bbe 28#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 29#include "set.h"
30#include "socket-util.h"
15a5e950 31#include "stdio-util.h"
8b43440b 32#include "string-table.h"
51517f9e 33#include "strv.h"
62e021a9 34#include "sysctl-util.h"
e4de7287 35#include "tmpfile-util.h"
299ad32d 36#include "udev-util.h"
cf1d700d
TG		 37#include "util.h"
38#include "virt.h"
fc2f9534 39
bdb9f580
YW		 40uint32_t link_get_vrf_table(Link *link) {
41 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
42}
43
44uint32_t link_get_dhcp_route_table(Link *link) {
45 /* When the interface is part of an VRF use the VRFs routing table, unless
46 * another table is explicitly specified. */
47 if (link->network->dhcp_route_table_set)
48 return link->network->dhcp_route_table;
49 return link_get_vrf_table(link);
50}
51
52uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
53 if (link->network->ipv6_accept_ra_route_table_set)
54 return link->network->ipv6_accept_ra_route_table;
55 return link_get_vrf_table(link);
56}
57
f24648a6
YW		 58DUID* link_get_duid(Link *link) {
59 if (link->network->duid.type != _DUID_TYPE_INVALID)
60 return &link->network->duid;
61 else
62 return &link->manager->duid;
63}
64
bafa9641
YW		 65int link_sysctl_ipv6_enabled(Link *link) {
66 _cleanup_free_ char *value = NULL;
67 int r;
68
69 r = sysctl_read_ip_property(AF_INET6, link->ifname, "disable_ipv6", &value);
70 if (r < 0)
71 return log_link_warning_errno(link, r,
72 "Failed to read net.ipv6.conf.%s.disable_ipv6 sysctl property: %m",
73 link->ifname);
74
75 link->sysctl_ipv6_enabled = value[0] == '0';
76 return link->sysctl_ipv6_enabled;
77}
78
b9d74c40
LP		 79static bool link_dhcp6_enabled(Link *link) {
80 assert(link);
81
fa709992
LP		 82 if (!socket_ipv6_is_supported())
83 return false;
84
78c958f8
TG		 85 if (link->flags & IFF_LOOPBACK)
86 return false;
87
88 if (!link->network)
89 return false;
90
f2bfcdb9
YW		 91 if (link->network->bond)
92 return false;
93
cab042b8 94 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 95 return false;
96
bafa9641 97 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 98 return false;
99
e0ee46f2 100 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 101}
102
b9d74c40
LP		 103static bool link_dhcp4_enabled(Link *link) {
104 assert(link);
105
78c958f8
TG		 106 if (link->flags & IFF_LOOPBACK)
107 return false;
108
109 if (!link->network)
110 return false;
111
f2bfcdb9
YW		 112 if (link->network->bond)
113 return false;
114
cab042b8 115 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 116 return false;
117
e0ee46f2 118 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 119}
120
b9d74c40
LP		 121static bool link_dhcp4_server_enabled(Link *link) {
122 assert(link);
123
78c958f8
TG		 124 if (link->flags & IFF_LOOPBACK)
125 return false;
126
127 if (!link->network)
128 return false;
129
f2bfcdb9
YW		 130 if (link->network->bond)
131 return false;
132
cab042b8 133 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 134 return false;
135
78c958f8
TG		 136 return link->network->dhcp_server;
137}
138
910feb78 139bool link_ipv4ll_enabled(Link *link, AddressFamilyBoolean mask) {
b9d74c40 140 assert(link);
910feb78 141 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 142
78c958f8
TG		 143 if (link->flags & IFF_LOOPBACK)
144 return false;
145
146 if (!link->network)
147 return false;
148
d61e4c5b 149 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 150 return false;
151
f410d463
YW		 152 /* L3 or L3S mode do not support ARP. */
153 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
154 return false;
155
f2bfcdb9
YW		 156 if (link->network->bond)
157 return false;
158
d61e4c5b
YW		 159 if (link->network->bond)
160 return false;
161
910feb78 162 return link->network->link_local & mask;
8bc17bb3
SS		 163}
164
b9d74c40
LP		 165static bool link_ipv6ll_enabled(Link *link) {
166 assert(link);
167
fa709992
LP		 168 if (!socket_ipv6_is_supported())
169 return false;
170
d0d6a4cd
TG		 171 if (link->flags & IFF_LOOPBACK)
172 return false;
173
174 if (!link->network)
175 return false;
176
d61e4c5b 177 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 178 return false;
179
f2bfcdb9
YW		 180 if (link->network->bond)
181 return false;
182
bafa9641 183 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 184 return false;
185
e0ee46f2 186 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 187}
188
439689c6
SS		 189static bool link_ipv6_enabled(Link *link) {
190 assert(link);
191
192 if (!socket_ipv6_is_supported())
193 return false;
194
b102cdca 195 if (link->network->bond)
2b00a4e0
TY		 196 return false;
197
bafa9641 198 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 199 return false;
200
cab042b8 201 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 202 return false;
203
4cef7fe3
TY		 204 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
205 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 206}
207
7465dd22
PF		 208static bool link_radv_enabled(Link *link) {
209 assert(link);
210
211 if (!link_ipv6ll_enabled(link))
212 return false;
213
55a7c78b 214 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 215}
216
769d324c 217static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 218 assert(link);
219
5a8bcb67
LP		 220 if (link->flags & IFF_LOOPBACK)
221 return false;
222
223 if (!link->network)
224 return false;
225
765afd5c
LP		 226 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
227 return false;
228
e0ee46f2 229 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 230}
231
232static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 233 assert(link);
765afd5c
LP		 234
235 if (!socket_ipv6_is_supported())
236 return false;
237
769d324c
LP		 238 if (link->flags & IFF_LOOPBACK)
239 return false;
240
241 if (!link->network)
242 return false;
243
765afd5c
LP		 244 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
245 return false;
246
bafa9641 247 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 248 return false;
249
e0ee46f2 250 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 251}
252
23d8b221
SS		 253static bool link_proxy_arp_enabled(Link *link) {
254 assert(link);
255
256 if (link->flags & IFF_LOOPBACK)
257 return false;
258
259 if (!link->network)
260 return false;
261
262 if (link->network->proxy_arp < 0)
263 return false;
264
265 return true;
266}
267
b9d74c40
LP		 268static bool link_ipv6_accept_ra_enabled(Link *link) {
269 assert(link);
270
fa709992
LP		 271 if (!socket_ipv6_is_supported())
272 return false;
273
f5a8c43f
TG		 274 if (link->flags & IFF_LOOPBACK)
275 return false;
276
277 if (!link->network)
278 return false;
279
702c979f
SS		 280 if (!link_ipv6ll_enabled(link))
281 return false;
282
f5a8c43f
TG		 283 /* If unset use system default (enabled if local forwarding is disabled.
284 * disabled if local forwarding is enabled).
285 * If set, ignore or enforce RA independent of local forwarding state.
286 */
287 if (link->network->ipv6_accept_ra < 0)
288 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
289 return !link_ipv6_forward_enabled(link);
290 else if (link->network->ipv6_accept_ra > 0)
291 /* accept RA even if ip_forward is enabled */
292 return true;
293 else
294 /* ignore RA */
295 return false;
296}
297
1f0d9695 298static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 299 assert(link);
d68e2e59
LP		 300
301 if (!socket_ipv6_is_supported())
302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
303
49092e22 304 if (link->flags & IFF_LOOPBACK)
1f0d9695 305 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 306
307 if (!link->network)
1f0d9695 308 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 309
310 return link->network->ipv6_privacy_extensions;
311}
312
439689c6 313static int link_enable_ipv6(Link *link) {
439689c6
SS		 314 bool disabled;
315 int r;
316
317 if (link->flags & IFF_LOOPBACK)
318 return 0;
319
320 disabled = !link_ipv6_enabled(link);
321
62e021a9 322 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 323 if (r < 0)
c98b3545 324 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 325 else
b106c586 326 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 327
328 return 0;
329}
330
34bf3c00
YW		 331static bool link_is_enslaved(Link *link) {
332 if (link->flags & IFF_SLAVE)
333 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
334 return true;
335
34bf3c00
YW		 336 if (!link->network)
337 return false;
338
bb262ef0 339 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 340 return true;
341
bb262ef0
YW		 342 /* TODO: add conditions for other netdevs. */
343
34bf3c00
YW		 344 return false;
345}
346
45e11abf
YW		 347static void link_update_master_operstate(Link *link, NetDev *netdev) {
348 Link *master;
349
350 if (!netdev)
351 return;
352
353 if (link_get(link->manager, netdev->ifindex, &master) < 0)
354 return;
355
356 link_update_operstate(master, true);
357}
358
359void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 360 LinkOperationalState operstate;
45e11abf 361 Iterator i;
14153d1b 362
84de38c5
TG		 363 assert(link);
364
365 if (link->kernel_operstate == IF_OPER_DORMANT)
366 operstate = LINK_OPERSTATE_DORMANT;
367 else if (link_has_carrier(link)) {
368 Address *address;
369 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 370
371 /* if we have carrier, check what addresses we have */
372 SET_FOREACH(address, link->addresses, i) {
373 if (!address_is_ready(address))
374 continue;
375
376 if (address->scope < scope)
377 scope = address->scope;
378 }
379
380 /* for operstate we also take foreign addresses into account */
381 SET_FOREACH(address, link->addresses_foreign, i) {
382 if (!address_is_ready(address))
383 continue;
384
385 if (address->scope < scope)
386 scope = address->scope;
387 }
388
389 if (scope < RT_SCOPE_SITE)
390 /* universally accessible addresses found */
391 operstate = LINK_OPERSTATE_ROUTABLE;
392 else if (scope < RT_SCOPE_HOST)
393 /* only link or site local addresses found */
394 operstate = LINK_OPERSTATE_DEGRADED;
395 else
396 /* no useful addresses found */
397 operstate = LINK_OPERSTATE_CARRIER;
398 } else if (link->flags & IFF_UP)
399 operstate = LINK_OPERSTATE_NO_CARRIER;
400 else
401 operstate = LINK_OPERSTATE_OFF;
402
14153d1b 403 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 404 link_is_enslaved(link))
14153d1b
YW		 405 operstate = LINK_OPERSTATE_ENSLAVED;
406
c9cc0383 407 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 408 Link *slave;
409
5f707e12 410 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 411 link_update_operstate(slave, false);
412
c9cc0383
YW		 413 if (slave->operstate < LINK_OPERSTATE_CARRIER)
414 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 415 }
416 }
417
84de38c5
TG		 418 if (link->operstate != operstate) {
419 link->operstate = operstate;
420 link_send_changed(link, "OperationalState", NULL);
421 link_dirty(link);
84de38c5 422 }
959f65d3 423
45e11abf
YW		 424 if (also_update_master && link->network) {
425 link_update_master_operstate(link, link->network->bond);
426 link_update_master_operstate(link, link->network->bridge);
959f65d3 427 }
84de38c5
TG		 428}
429
51d18171
TG		 430#define FLAG_STRING(string, flag, old, new) \
431 (((old ^ new) & flag) \
432 ? ((old & flag) ? (" -" string) : (" +" string)) \
433 : "")
434
bb262ef0 435static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 436 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
437 uint8_t operstate;
438 int r;
439
440 assert(link);
441
442 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 443 if (r < 0)
444 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 445
1c4baffc 446 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 447 if (r < 0)
448 /* if we got a message without operstate, take it to mean
449 the state was unchanged */
450 operstate = link->kernel_operstate;
451
bb262ef0 452 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 453 return 0;
454
455 if (link->flags != flags) {
6a7a4e4d 456 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		 457 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
458 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
459 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
460 FLAG_STRING("UP", IFF_UP, link->flags, flags),
461 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
462 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
463 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
464 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
465 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
466 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
467 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
468 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
469 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
470 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
471 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
472 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
473 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
474 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
475 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
476
477 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
478 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
479 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
480 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
481 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
482 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
483 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
484 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
485
486 /* link flags are currently at most 18 bits, let's align to
487 * printing 20 */
488 if (unknown_flags_added)
79008bdd 489 log_link_debug(link,
6a7a4e4d 490 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 491 unknown_flags_added);
492
493 if (unknown_flags_removed)
79008bdd 494 log_link_debug(link,
6a7a4e4d 495 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 496 unknown_flags_removed);
497 }
498
499 link->flags = flags;
500 link->kernel_operstate = operstate;
501
959f65d3 502 link_update_operstate(link, true);
51d18171
TG		 503
504 return 0;
505}
506
1c4baffc 507static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 508 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 509 uint16_t type;
6cad256d 510 const char *ifname, *kind = NULL;
505f8da7 511 int r, ifindex;
b710e6b6 512 unsigned short iftype;
f579559b 513
0c2f9b84 514 assert(manager);
505f8da7 515 assert(message);
f579559b
TG		 516 assert(ret);
517
6cad256d
TJ		 518 /* check for link kind */
519 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
520 if (r == 0) {
db2f8a2e 521 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 522 r = sd_netlink_message_exit_container(message);
523 if (r < 0)
524 return r;
525 }
526
1c4baffc 527 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 528 if (r < 0)
529 return r;
530 else if (type != RTM_NEWLINK)
531 return -EINVAL;
532
533 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
534 if (r < 0)
535 return r;
536 else if (ifindex <= 0)
537 return -EINVAL;
538
b710e6b6
LP		 539 r = sd_rtnl_message_link_get_type(message, &iftype);
540 if (r < 0)
541 return r;
542
1c4baffc 543 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 544 if (r < 0)
545 return r;
546
17f9c355 547 link = new(Link, 1);
f579559b
TG		 548 if (!link)
549 return -ENOMEM;
550
17f9c355
YW		 551 *link = (Link) {
552 .n_ref = 1,
553 .manager = manager,
554 .state = LINK_STATE_PENDING,
555 .rtnl_extended_attrs = true,
556 .ifindex = ifindex,
557 .iftype = iftype,
bafa9641 558 .sysctl_ipv6_enabled = -1,
17f9c355
YW		 559 };
560
505f8da7
TG		 561 link->ifname = strdup(ifname);
562 if (!link->ifname)
563 return -ENOMEM;
f579559b 564
6cad256d
TJ		 565 if (kind) {
566 link->kind = strdup(kind);
567 if (!link->kind)
568 return -ENOMEM;
569 }
570
cbff7170
TJ		 571 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
572 if (r < 0)
573 log_link_debug_errno(link, r, "New device has no master, continuing without");
574
1c4baffc 575 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 576 if (r < 0)
34437b4f 577 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 578
34437b4f 579 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 580 return -ENOMEM;
fe8db0c5 581
34437b4f 582 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 583 return -ENOMEM;
584
34437b4f 585 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 586 return -ENOMEM;
587
d5099efc 588 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 589 if (r < 0)
590 return r;
591
592 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 593 if (r < 0)
594 return r;
595
bb262ef0 596 r = link_update_flags(link, message, false);
51d18171
TG		 597 if (r < 0)
598 return r;
599
1cc6c93a 600 *ret = TAKE_PTR(link);
f579559b
TG		 601
602 return 0;
603}
604
8301aa0b 605static Link *link_free(Link *link) {
428fd0a7
TG		 606 Address *address;
607
8301aa0b 608 assert(link);
f579559b 609
f535e354
YW		 610 link->routes = set_free_with_destructor(link->routes, route_free);
611 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 612
f535e354
YW		 613 link->addresses = set_free_with_destructor(link->addresses, address_free);
614 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 615
11bf3cce
LP		 616 while ((address = link->pool_addresses)) {
617 LIST_REMOVE(addresses, link->pool_addresses, address);
618 address_free(address);
619 }
620
bfcdba8d 621 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 622 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 623 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 624
7272b25e 625 link_lldp_emit_stop(link);
8e1ad1ea 626
68a8723c
TG		 627 free(link->lease_file);
628
4afd3348 629 sd_lldp_unref(link->lldp);
49699bac
SS		 630 free(link->lldp_file);
631
c69305ff
LP		 632 ndisc_flush(link);
633
56cd007a 634 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 635 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 636 sd_ndisc_unref(link->ndisc);
7465dd22 637 sd_radv_unref(link->radv);
1e7a0e21 638
c166a070 639 free(link->ifname);
ceac4078 640 free(link->kind);
6cad256d 641
db2f8a2e 642 (void) unlink(link->state_file);
fe8db0c5 643 free(link->state_file);
c166a070 644
51517f9e 645 sd_device_unref(link->sd_device);
b5db00e5 646
0d4ad91d 647 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 648 hashmap_free(link->bound_by_links);
649
5f707e12 650 set_free_with_destructor(link->slaves, link_unref);
033295c1 651
c9c908a6
YW		 652 network_unref(link->network);
653
8301aa0b 654 return mfree(link);
14b746f7
TG		 655}
656
8301aa0b 657DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 658
11a7f229
TG		 659int link_get(Manager *m, int ifindex, Link **ret) {
660 Link *link;
11a7f229
TG		 661
662 assert(m);
11a7f229
TG		 663 assert(ifindex);
664 assert(ret);
665
ae06ab10 666 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 667 if (!link)
668 return -ENODEV;
669
670 *ret = link;
671
672 return 0;
673}
674
af9ba57a 675void link_set_state(Link *link, LinkState state) {
e331e246
TG		 676 assert(link);
677
678 if (link->state == state)
679 return;
680
0beb9542
YW		 681 log_link_debug(link, "State changed: %s -> %s",
682 link_state_to_string(link->state),
683 link_state_to_string(state));
684
e331e246
TG		 685 link->state = state;
686
687 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 688}
689
57bd6899
TG		 690static void link_enter_unmanaged(Link *link) {
691 assert(link);
692
e331e246 693 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 694
84de38c5 695 link_dirty(link);
57bd6899
TG		 696}
697
95355a28 698int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 699 int r = 0, k;
700
701 assert(link);
702 assert(link->manager);
703 assert(link->manager->event);
704
d03073dd
YW		 705 dhcp4_release_old_lease(link);
706
95355a28
YW		 707 if (link->dhcp_client && (!may_keep_dhcp || !link->network ||
708 !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) {
111bb8f9 709 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 710 if (k < 0)
36c7d709 711 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 712 }
713
ba179154 714 if (link->ipv4ll) {
111bb8f9 715 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 716 if (k < 0)
36c7d709 717 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 718 }
719
f5a8c43f
TG		 720 if (link->dhcp6_client) {
721 k = sd_dhcp6_client_stop(link->dhcp6_client);
722 if (k < 0)
36c7d709 723 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 724 }
4138fb2c 725
1e7a0e21
LP		 726 if (link->ndisc) {
727 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 728 if (k < 0)
36c7d709 729 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 730 }
731
7465dd22
PF		 732 if (link->radv) {
733 k = sd_radv_stop(link->radv);
734 if (k < 0)
735 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
736 }
737
7272b25e 738 link_lldp_emit_stop(link);
111bb8f9
TG		 739 return r;
740}
741
b22d8a00 742void link_enter_failed(Link *link) {
ef1ba606 743 assert(link);
f882c247 744
370e9930 745 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 746 return;
747
6a7a4e4d 748 log_link_warning(link, "Failed");
449f7554 749
e331e246 750 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 751
95355a28 752 link_stop_clients(link, false);
111bb8f9 753
84de38c5 754 link_dirty(link);
f882c247
TG		 755}
756
4f434938
LP		 757static Address* link_find_dhcp_server_address(Link *link) {
758 Address *address;
759
760 assert(link);
761 assert(link->network);
762
d4cdbea5 763 /* The first statically configured address if there is any */
4f434938
LP		 764 LIST_FOREACH(addresses, address, link->network->static_addresses) {
765
766 if (address->family != AF_INET)
767 continue;
768
af93291c 769 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 770 continue;
771
772 return address;
773 }
774
775 /* If that didn't work, find a suitable address we got from the pool */
776 LIST_FOREACH(addresses, address, link->pool_addresses) {
777 if (address->family != AF_INET)
778 continue;
779
780 return address;
781 }
782
783 return NULL;
784}
785
7033af49
YW		 786static int link_join_netdevs_after_configured(Link *link) {
787 NetDev *netdev;
788 Iterator i;
789 int r;
790
791 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
792 if (netdev->ifindex > 0)
793 /* Assume already enslaved. */
794 continue;
795
796 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
797 continue;
798
799 log_struct(LOG_DEBUG,
800 LOG_LINK_INTERFACE(link),
801 LOG_NETDEV_INTERFACE(netdev),
802 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
803
804 r = netdev_join(netdev, link, NULL);
805 if (r < 0)
806 return log_struct_errno(LOG_WARNING, r,
807 LOG_LINK_INTERFACE(link),
808 LOG_NETDEV_INTERFACE(netdev),
809 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
810 }
811
812 return 0;
813}
814
e3a7b048 815static void link_enter_configured(Link *link) {
dd43110f
TG		 816 assert(link);
817 assert(link->network);
e3a7b048 818
289e6774 819 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 820 return;
dd43110f 821
6a7a4e4d 822 log_link_info(link, "Configured");
dd43110f 823
e331e246 824 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 825
7033af49
YW		 826 (void) link_join_netdevs_after_configured(link);
827
84de38c5 828 link_dirty(link);
dd43110f
TG		 829}
830
47079967 831static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 832 RoutingPolicyRule *rule, *rrule = NULL;
833 int r;
834
835 assert(link);
836 assert(link->network);
837
2428613f
YW		 838 link_set_state(link, LINK_STATE_CONFIGURING);
839 link->routing_policy_rules_configured = false;
840
8a9b3a23
SS		 841 LIST_FOREACH(rules, rule, link->network->rules) {
842 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 843 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
844 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 845 if (r == 0) {
8a9b3a23
SS		 846 (void) routing_policy_rule_make_local(link->manager, rrule);
847 continue;
848 }
849
9f08a578 850 r = routing_policy_rule_configure(rule, link, NULL);
8a9b3a23
SS		 851 if (r < 0) {
852 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
853 link_enter_failed(link);
854 return r;
855 }
7ef7e550
YW		 856 if (r > 0)
857 link->routing_policy_rule_messages++;
8a9b3a23
SS		 858 }
859
860 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 861 if (link->routing_policy_rule_messages == 0) {
862 link->routing_policy_rules_configured = true;
863 link_check_ready(link);
864 } else
865 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 866
867 return 0;
868}
869
302a796f 870static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 871 int r;
872
1046bf9b 873 assert(link);
7715629e 874 assert(link->route_messages > 0);
289e6774
WKI		 875 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
876 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 877
7715629e 878 link->route_messages--;
f882c247 879
77a008c0 880 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 881 return 1;
882
1c4baffc 883 r = sd_netlink_message_get_errno(m);
c166a070 884 if (r < 0 && r != -EEXIST)
a2fae7bb 885 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 886
7715629e 887 if (link->route_messages == 0) {
6a7a4e4d 888 log_link_debug(link, "Routes set");
7715629e 889 link->static_routes_configured = true;
8012cd39 890 link_check_ready(link);
dd3efc09 891 }
f882c247
TG		 892
893 return 1;
894}
895
b5799eeb 896int link_request_set_routes(Link *link) {
bf61b05a
LP		 897 enum {
898 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
899 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
900 _PHASE_MAX
901 } phase;
a6cc569e 902 Route *rt;
f882c247
TG		 903 int r;
904
905 assert(link);
906 assert(link->network);
c42ff3a1
WKI		 907 assert(link->addresses_configured);
908 assert(link->address_messages == 0);
289e6774 909 assert(link->state != _LINK_STATE_INVALID);
f882c247 910
289e6774 911 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 912 link->static_routes_configured = false;
27c34f73 913
47079967 914 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 915 if (r < 0)
916 return r;
f882c247 917
bf61b05a
LP		 918 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
919 for (phase = 0; phase < _PHASE_MAX; phase++)
920 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 921
bf61b05a
LP		 922 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
923 continue;
a6cc569e 924
0d34228f
SS		 925 r = route_configure(rt, link, route_handler);
926 if (r < 0) {
927 log_link_warning_errno(link, r, "Could not set routes: %m");
928 link_enter_failed(link);
929 return r;
930 }
c4423317
YW		 931 if (r > 0)
932 link->route_messages++;
0d34228f 933 }
f5be5601 934
7715629e
ST		 935 if (link->route_messages == 0) {
936 link->static_routes_configured = true;
8012cd39 937 link_check_ready(link);
431ca2ce 938 } else
6a7a4e4d 939 log_link_debug(link, "Setting routes");
f882c247
TG		 940
941 return 0;
942}
943
6accfd31
DA		 944void link_check_ready(Link *link) {
945 Address *a;
946 Iterator i;
947
948 assert(link);
949
950 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
951 return;
952
953 if (!link->network)
954 return;
955
956 if (!link->addresses_configured)
957 return;
958
959 if (!link->neighbors_configured)
960 return;
961
6aa5773b
DA		 962 SET_FOREACH(a, link->addresses, i)
963 if (!address_is_ready(a))
964 return;
965
966 if (!link->addresses_ready) {
967 link->addresses_ready = true;
968 link_request_set_routes(link);
710ce9e5 969 return;
6aa5773b
DA		 970 }
971
6accfd31
DA		 972 if (!link->static_routes_configured)
973 return;
974
975 if (!link->routing_policy_rules_configured)
976 return;
977
463797c1 978 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 979
463797c1
YW		 980 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
981 return;
6accfd31 982
463797c1
YW		 983 if (link_ipv6ll_enabled(link) &&
984 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
985 return;
6accfd31 986
463797c1
YW		 987 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
988 !link->dhcp4_configured &&
989 !link->dhcp6_configured &&
990 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
991 /* When DHCP is enabled, at least one protocol must provide an address, or
992 * an IPv4ll fallback address must be configured. */
993 return;
994
995 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
996 return;
997 }
6accfd31 998
6accfd31
DA		 999 if (link->state != LINK_STATE_CONFIGURED)
1000 link_enter_configured(link);
1001
1002 return;
1003}
1004
e4a71bf3
WKI		 1005static int link_request_set_neighbors(Link *link) {
1006 Neighbor *neighbor;
1007 int r;
1008
1009 assert(link);
1010 assert(link->network);
1011 assert(link->state != _LINK_STATE_INVALID);
1012
1013 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1014 link->neighbors_configured = false;
e4a71bf3
WKI		 1015
1016 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1017 r = neighbor_configure(neighbor, link, NULL);
1018 if (r < 0) {
1019 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1020 link_enter_failed(link);
1021 return r;
1022 }
1023 }
1024
1025 if (link->neighbor_messages == 0) {
1026 link->neighbors_configured = true;
1027 link_check_ready(link);
1028 } else
1029 log_link_debug(link, "Setting neighbors");
1030
1031 return 0;
1032}
1033
302a796f 1034static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1035 int r;
1036
4958aee4 1037 assert(rtnl);
f5be5601
TG		 1038 assert(m);
1039 assert(link);
1040 assert(link->ifname);
7715629e 1041 assert(link->address_messages > 0);
289e6774 1042 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1043 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1044
7715629e 1045 link->address_messages--;
f882c247 1046
5da8149f 1047 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1048 return 1;
1049
1c4baffc 1050 r = sd_netlink_message_get_errno(m);
c166a070 1051 if (r < 0 && r != -EEXIST)
a2fae7bb 1052 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1053 else if (r >= 0)
200a0868 1054 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1055
7715629e 1056 if (link->address_messages == 0) {
6a7a4e4d 1057 log_link_debug(link, "Addresses set");
c42ff3a1 1058 link->addresses_configured = true;
6aa5773b 1059 link_check_ready(link);
dd3efc09 1060 }
f882c247
TG		 1061
1062 return 1;
1063}
1064
a380b2d4 1065static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1066 _cleanup_free_ struct in_addr *addresses = NULL;
1067 size_t n_addresses = 0, n_allocated = 0;
5512a963 1068 unsigned i;
4f5f911e
LP		 1069
1070 log_debug("Copying DNS server information from %s", link->ifname);
1071
1072 if (!link->network)
1073 return 0;
1074
5512a963 1075 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1076 struct in_addr ia;
4f5f911e
LP		 1077
1078 /* Only look for IPv4 addresses */
5512a963 1079 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1080 continue;
1081
49ad6829
LP		 1082 ia = link->network->dns[i].address.in;
1083
1084 /* Never propagate obviously borked data */
1085 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1086 continue;
1087
4f5f911e
LP		 1088 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1089 return log_oom();
1090
49ad6829 1091 addresses[n_addresses++] = ia;
4f5f911e
LP		 1092 }
1093
5512a963 1094 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1095 const struct in_addr *da = NULL;
072320ea 1096 int j, n;
4f5f911e
LP		 1097
1098 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1099 if (n > 0) {
1100
1101 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1102 return log_oom();
1103
072320ea
TH		 1104 for (j = 0; j < n; j++)
1105 if (in4_addr_is_non_local(&da[j]))
1106 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1107 }
1108 }
1109
1110 if (n_addresses <= 0)
1111 return 0;
1112
1113 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1114}
1115
a380b2d4 1116static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1117 _cleanup_free_ struct in_addr *addresses = NULL;
1118 size_t n_addresses = 0, n_allocated = 0;
1119 char **a;
1120
1121 if (!link->network)
1122 return 0;
1123
1124 log_debug("Copying NTP server information from %s", link->ifname);
1125
1126 STRV_FOREACH(a, link->network->ntp) {
004aadca 1127 union in_addr_union ia;
4f5f911e
LP		 1128
1129 /* Only look for IPv4 addresses */
004aadca 1130 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1131 continue;
49ad6829
LP		 1132
1133 /* Never propagate obviously borked data */
004aadca 1134 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1135 continue;
4f5f911e
LP		 1136
1137 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1138 return log_oom();
1139
004aadca 1140 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1141 }
1142
5512a963 1143 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1144 const struct in_addr *da = NULL;
072320ea 1145 int j, n;
4f5f911e
LP		 1146
1147 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1148 if (n > 0) {
1149
1150 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1151 return log_oom();
1152
072320ea
TH		 1153 for (j = 0; j < n; j++)
1154 if (in4_addr_is_non_local(&da[j]))
1155 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1156 }
1157 }
1158
1159 if (n_addresses <= 0)
1160 return 0;
1161
1162 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1163}
1164
f6bb7ac5
TJ		 1165static int link_set_bridge_fdb(Link *link) {
1166 FdbEntry *fdb_entry;
197e2809 1167 int r;
f6bb7ac5
TJ		 1168
1169 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1170 r = fdb_entry_configure(link, fdb_entry);
197e2809 1171 if (r < 0)
f6bb7ac5 1172 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1173 }
1174
197e2809 1175 return 0;
f6bb7ac5
TJ		 1176}
1177
289e6774 1178static int link_request_set_addresses(Link *link) {
95b74ef6 1179 AddressLabel *label;
a6cc569e 1180 Address *ad;
f882c247
TG		 1181 int r;
1182
1183 assert(link);
1184 assert(link->network);
f5be5601 1185 assert(link->state != _LINK_STATE_INVALID);
f882c247 1186
2428613f
YW		 1187 link_set_state(link, LINK_STATE_CONFIGURING);
1188
1189 /* Reset all *_configured flags we are configuring. */
1190 link->addresses_configured = false;
6aa5773b 1191 link->addresses_ready = false;
2428613f
YW		 1192 link->neighbors_configured = false;
1193 link->static_routes_configured = false;
1194 link->routing_policy_rules_configured = false;
1195
f6bb7ac5
TJ		 1196 r = link_set_bridge_fdb(link);
1197 if (r < 0)
1198 return r;
1199
f3ef324d
YW		 1200 r = link_request_set_neighbors(link);
1201 if (r < 0)
1202 return r;
e4a71bf3 1203
3d3d4255 1204 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1205 bool update;
1206
1207 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1208
1209 r = address_configure(ad, link, address_handler, update);
dd3efc09 1210 if (r < 0) {
5a8bcb67 1211 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1212 link_enter_failed(link);
95b74ef6
SS		 1213 return r;
1214 }
54a1a535
YW		 1215 if (r > 0)
1216 link->address_messages++;
95b74ef6
SS		 1217 }
1218
1219 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1220 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1221 if (r < 0) {
1222 log_link_warning_errno(link, r, "Could not set address label: %m");
1223 link_enter_failed(link);
f5be5601
TG		 1224 return r;
1225 }
1226
7715629e 1227 link->address_label_messages++;
f882c247
TG		 1228 }
1229
d4cdbea5
TG		 1230 /* now that we can figure out a default address for the dhcp server,
1231 start it */
708c425d 1232 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1233 Address *address;
4f5f911e
LP		 1234 Link *uplink = NULL;
1235 bool acquired_uplink = false;
d4cdbea5
TG		 1236
1237 address = link_find_dhcp_server_address(link);
1238 if (!address) {
6a7a4e4d 1239 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1240 link_enter_failed(link);
1241 return 0;
1242 }
1243
61986155 1244 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1245 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1246 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1247 if (r < 0)
1248 return r;
1249
1250 /* TODO:
1251 r = sd_dhcp_server_set_router(link->dhcp_server,
1252 &main_address->in_addr.in);
1253 if (r < 0)
1254 return r;
d4cdbea5
TG		 1255 */
1256
586ac6f7
LP		 1257 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1258 r = sd_dhcp_server_set_max_lease_time(
1259 link->dhcp_server,
1260 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1261 if (r < 0)
1262 return r;
1263 }
1264
1265 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1266 r = sd_dhcp_server_set_default_lease_time(
1267 link->dhcp_server,
1268 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1269 if (r < 0)
1270 return r;
1271 }
1272
1a04db0f
LP		 1273 if (link->network->dhcp_server_emit_dns) {
1274
4f5f911e 1275 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1276 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1277 else {
1278 uplink = manager_find_uplink(link->manager, link);
1279 acquired_uplink = true;
1280
1281 if (!uplink) {
1282 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1283 r = 0;
1284 } else
a380b2d4 1285 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1286 }
1287 if (r < 0)
1288 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1289 }
1290
1a04db0f
LP		 1291 if (link->network->dhcp_server_emit_ntp) {
1292
4f5f911e 1293 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1294 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1295 else {
1296 if (!acquired_uplink)
1297 uplink = manager_find_uplink(link->manager, link);
1298
1299 if (!uplink) {
1300 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1301 r = 0;
1302 } else
a380b2d4 1303 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1304
1305 }
1306 if (r < 0)
1307 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1308 }
1309
77ff6022 1310 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1311 if (r < 0)
1312 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1313
8eb9058d
LP		 1314 if (link->network->dhcp_server_emit_timezone) {
1315 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1316 const char *tz = NULL;
8eb9058d
LP		 1317
1318 if (link->network->dhcp_server_timezone)
1319 tz = link->network->dhcp_server_timezone;
1320 else {
1321 r = get_timezone(&buffer);
1322 if (r < 0)
1323 log_warning_errno(r, "Failed to determine timezone: %m");
1324 else
1325 tz = buffer;
1326 }
1327
1328 if (tz) {
1329 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1330 if (r < 0)
1331 return r;
1332 }
1333 }
7da7340a
RJ		 1334 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1335 r = sd_dhcp_server_start(link->dhcp_server);
1336 if (r < 0) {
1337 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1338
7da7340a 1339 link_enter_failed(link);
d4cdbea5 1340
7da7340a
RJ		 1341 return 0;
1342 }
f3ef324d 1343 }
d4cdbea5 1344
6a7a4e4d 1345 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1346 }
1347
c42ff3a1
WKI		 1348 if (link->address_messages == 0) {
1349 link->addresses_configured = true;
6aa5773b 1350 link_check_ready(link);
c42ff3a1 1351 } else
6a7a4e4d 1352 log_link_debug(link, "Setting addresses");
431ca2ce 1353
f882c247
TG		 1354 return 0;
1355}
1356
13b498f9 1357static int link_set_bridge_vlan(Link *link) {
86e2be7b 1358 int r;
13b498f9
TJ		 1359
1360 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1361 if (r < 0)
1362 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1363
1364 return r;
1365}
1366
a60a720c 1367static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1368 int r;
1369
1370 if (!link_proxy_arp_enabled(link))
1371 return 0;
1372
62e021a9 1373 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1374 if (r < 0)
1375 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1376
1377 return 0;
1378}
1379
55dc8c4a
YW		 1380static int link_configure_after_setting_mtu(Link *link);
1381
302a796f 1382static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1383 int r;
1384
1385 assert(m);
1386 assert(link);
1387 assert(link->ifname);
1388
55dc8c4a
YW		 1389 link->setting_mtu = false;
1390
5da8149f 1391 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1392 return 1;
1393
1c4baffc 1394 r = sd_netlink_message_get_errno(m);
55dc8c4a 1395 if (r < 0) {
a2fae7bb 1396 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1397 return 1;
1398 }
1399
1400 log_link_debug(link, "Setting MTU done.");
1401
bd08ce56 1402 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1403 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1404
1405 return 1;
1406}
1407
933c70a0 1408int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1409 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1410 int r;
1411
1412 assert(link);
1413 assert(link->manager);
1414 assert(link->manager->rtnl);
1415
40288ece
YW		 1416 if (mtu == 0 || link->setting_mtu)
1417 return 0;
1418
933c70a0 1419 if (link->mtu == mtu)
ee493106
YW		 1420 return 0;
1421
6a7a4e4d 1422 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1423
6a7a4e4d
LP		 1424 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1425 if (r < 0)
1426 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1427
44b598a1 1428 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1429 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1430 (void) link_enable_ipv6(link);
1431
1432 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1433 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1434 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1435
1436 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1437 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1438
72c2500b 1439 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1440 }
1441
1c4baffc 1442 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1443 if (r < 0)
1444 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1445
302a796f
YW		 1446 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1447 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1448 if (r < 0)
1449 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1450
ae941762 1451 link_ref(link);
1046bf9b 1452 link->setting_mtu = true;
b226d99b 1453
4f882b2a
TG		 1454 return 0;
1455}
1456
f6fcc1c2
YW		 1457static bool link_reduces_vlan_mtu(Link *link) {
1458 /* See netif_reduces_vlan_mtu() in kernel. */
1459 return streq_ptr(link->kind, "macsec");
1460}
1461
1462static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1463 uint32_t mtu = 0;
1464 NetDev *dev;
1465 Iterator i;
1466
1467 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1468 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1469 /* See vlan_dev_change_mtu() in kernel. */
1470 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1471
1472 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1473 /* See macvlan_change_mtu() in kernel. */
1474 mtu = dev->mtu;
1475
1476 return mtu;
1477}
1478
1479static int link_configure_mtu(Link *link) {
1480 uint32_t mtu;
1481
1482 assert(link);
1483 assert(link->network);
1484
1485 if (link->network->mtu > 0)
1486 return link_set_mtu(link, link->network->mtu);
1487
1488 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1489 if (link->mtu >= mtu)
1490 return 0;
1491
1492 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1493 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1494 link->mtu, mtu);
1495
1496 return link_set_mtu(link, mtu);
1497}
1498
302a796f 1499static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1500 int r;
1501
1502 assert(m);
1503 assert(link);
1504 assert(link->ifname);
1505
1506 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1507 return 1;
1508
1509 r = sd_netlink_message_get_errno(m);
1510 if (r < 0)
1511 log_link_warning_errno(link, r, "Could not set link flags: %m");
1512
1513 return 1;
1514}
1515
1516static int link_set_flags(Link *link) {
1517 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1518 unsigned ifi_change = 0;
1519 unsigned ifi_flags = 0;
1520 int r;
1521
1522 assert(link);
1523 assert(link->manager);
1524 assert(link->manager->rtnl);
1525
1526 if (link->flags & IFF_LOOPBACK)
1527 return 0;
1528
1529 if (!link->network)
1530 return 0;
1531
866e6b7a 1532 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1533 return 0;
1534
1535 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1536 if (r < 0)
1537 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1538
1539 if (link->network->arp >= 0) {
1540 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1541 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1542 }
1543
1544 if (link->network->multicast >= 0) {
1545 ifi_change |= IFF_MULTICAST;
1546 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1547 }
1548
866e6b7a
SS		 1549 if (link->network->allmulticast >= 0) {
1550 ifi_change |= IFF_ALLMULTI;
1551 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1552 }
1553
99d2baa2
SS		 1554 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1555 if (r < 0)
1556 return log_link_error_errno(link, r, "Could not set link flags: %m");
1557
302a796f
YW		 1558 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1559 link_netlink_destroy_callback, link);
99d2baa2
SS		 1560 if (r < 0)
1561 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1562
1563 link_ref(link);
1564
1565 return 0;
1566}
1567
e7ab854c
TG		 1568static int link_acquire_ipv6_conf(Link *link) {
1569 int r;
1570
1571 assert(link);
1572
e7ab854c 1573 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1574 assert(link->ndisc);
e7ab854c
TG		 1575
1576 log_link_debug(link, "Discovering IPv6 routers");
1577
1e7a0e21 1578 r = sd_ndisc_start(link->ndisc);
63348d13 1579 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1580 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1581 }
1582
7465dd22
PF		 1583 if (link_radv_enabled(link)) {
1584 assert(link->radv);
1585 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1586
1587 log_link_debug(link, "Starting IPv6 Router Advertisements");
1588
1589 r = sd_radv_start(link->radv);
1590 if (r < 0 && r != -EBUSY)
1591 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1592 }
1593
10752343
PF		 1594 (void) dhcp6_request_prefix_delegation(link);
1595
e7ab854c
TG		 1596 return 0;
1597}
1598
6fc25497 1599static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1600 int r;
1601
1602 assert(link);
ff254138
TG		 1603 assert(link->manager);
1604 assert(link->manager->event);
1605
910feb78 1606 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1607 assert(link->ipv4ll);
ff254138 1608
6a7a4e4d 1609 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1610
1611 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1612 if (r < 0)
1613 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1614 }
1615
78c958f8 1616 if (link_dhcp4_enabled(link)) {
eb34d4af 1617 assert(link->dhcp_client);
ff254138 1618
6a7a4e4d 1619 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1620
5c1d3fc9 1621 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1622 if (r < 0)
1623 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1624 }
ff254138 1625
6fc25497
SS		 1626 return 0;
1627}
1628
1629static int link_acquire_conf(Link *link) {
1630 int r;
1631
1632 assert(link);
1633
1634 r = link_acquire_ipv4_conf(link);
1635 if (r < 0)
1636 return r;
1637
3f7cc080 1638 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1639 r = link_acquire_ipv6_conf(link);
1640 if (r < 0)
1641 return r;
1642 }
1643
7272b25e
LP		 1644 if (link_lldp_emit_enabled(link)) {
1645 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1646 if (r < 0)
1647 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1648 }
1649
ff254138
TG		 1650 return 0;
1651}
1652
a61bb41c 1653bool link_has_carrier(Link *link) {
deb2e523
TG		 1654 /* see Documentation/networking/operstates.txt in the kernel sources */
1655
a61bb41c 1656 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1657 return true;
1658
a61bb41c 1659 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1660 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1661 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1662 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1663 return true;
1664
1665 return false;
1666}
1667
0e2fdb83
SS		 1668static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1669 int r;
1670
1671 assert(link);
1672
1673 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1674 return 1;
1675
1676 r = sd_netlink_message_get_errno(m);
1677 if (r < 0)
1678 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1679
1680 return 1;
1681}
1682
1683static int link_configure_addrgen_mode(Link *link) {
1684 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1685 uint8_t ipv6ll_mode;
1686 int r;
1687
1688 assert(link);
1689 assert(link->network);
1690 assert(link->manager);
1691 assert(link->manager->rtnl);
1692
9f6e82e6
YW		 1693 if (!socket_ipv6_is_supported())
1694 return 0;
1695
0e2fdb83
SS		 1696 log_link_debug(link, "Setting address genmode for link");
1697
1698 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1699 if (r < 0)
1700 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1701
1702 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1703 if (r < 0)
1704 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1705
1706 r = sd_netlink_message_open_container(req, AF_INET6);
1707 if (r < 0)
1708 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1709
1710 if (!link_ipv6ll_enabled(link))
1711 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1712 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1713 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1714 * reading the file fails with EIO. */
1715 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1716 else
1717 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1718
1719 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1720 if (r < 0)
1721 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1722
1723 r = sd_netlink_message_close_container(req);
1724 if (r < 0)
1725 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1726
1727 r = sd_netlink_message_close_container(req);
1728 if (r < 0)
1729 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1730
1731 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1732 link_netlink_destroy_callback, link);
1733 if (r < 0)
1734 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1735
1736 link_ref(link);
1737
1738 return 0;
1739}
1740
302a796f 1741static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1742 int r;
1743
1746cf2a
TG		 1744 assert(link);
1745
5da8149f 1746 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1747 return 1;
1748
1c4baffc 1749 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1750 if (r < 0)
26d6b214 1751 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1752 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1753
f882c247
TG		 1754 return 1;
1755}
1756
1cc84f3b 1757static int link_up(Link *link) {
4afd3348 1758 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1759 int r;
1760
f882c247 1761 assert(link);
c106cc36 1762 assert(link->network);
f882c247
TG		 1763 assert(link->manager);
1764 assert(link->manager->rtnl);
1765
6a7a4e4d 1766 log_link_debug(link, "Bringing link up");
449f7554 1767
6a7a4e4d
LP		 1768 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1769 if (r < 0)
1770 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1771
2b2d8603 1772 /* set it free if not enslaved with networkd */
6cb955c6 1773 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1774 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1777 }
1778
5d4795f3 1779 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1780 if (r < 0)
1781 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1782
c106cc36 1783 if (link->network->mac) {
1c4baffc 1784 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1785 if (r < 0)
1786 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1787 }
1788
302a796f
YW		 1789 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1790 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1791 if (r < 0)
1792 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1793
b226d99b
TG		 1794 link_ref(link);
1795
f882c247
TG		 1796 return 0;
1797}
1798
302a796f 1799static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1800 int r;
1801
1802 assert(link);
1803
1804 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1805 return 1;
1806
1c4baffc 1807 r = sd_netlink_message_get_errno(m);
0d4ad91d 1808 if (r < 0)
a2fae7bb 1809 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1810
1811 return 1;
1812}
1813
8e54db83 1814int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1815 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1816 int r;
1817
1818 assert(link);
1819 assert(link->manager);
1820 assert(link->manager->rtnl);
1821
6a7a4e4d 1822 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1823
1824 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1825 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1826 if (r < 0)
1827 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1828
1829 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1830 if (r < 0)
1831 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1832
8e54db83
YW		 1833 r = netlink_call_async(link->manager->rtnl, NULL, req,
1834 callback ?: link_down_handler,
302a796f 1835 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1836 if (r < 0)
1837 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1838
1839 link_ref(link);
1840
1841 return 0;
1842}
1843
1844static int link_handle_bound_to_list(Link *link) {
1845 Link *l;
1846 Iterator i;
1847 int r;
1848 bool required_up = false;
1849 bool link_is_up = false;
1850
1851 assert(link);
1852
1853 if (hashmap_isempty(link->bound_to_links))
1854 return 0;
1855
1856 if (link->flags & IFF_UP)
1857 link_is_up = true;
1858
1859 HASHMAP_FOREACH (l, link->bound_to_links, i)
1860 if (link_has_carrier(l)) {
1861 required_up = true;
1862 break;
1863 }
1864
1865 if (!required_up && link_is_up) {
8e54db83 1866 r = link_down(link, NULL);
0d4ad91d
AR		 1867 if (r < 0)
1868 return r;
1869 } else if (required_up && !link_is_up) {
1870 r = link_up(link);
1871 if (r < 0)
1872 return r;
1873 }
1874
1875 return 0;
1876}
1877
1878static int link_handle_bound_by_list(Link *link) {
1879 Iterator i;
1880 Link *l;
1881 int r;
1882
1883 assert(link);
1884
1885 if (hashmap_isempty(link->bound_by_links))
1886 return 0;
1887
1888 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1889 r = link_handle_bound_to_list(l);
1890 if (r < 0)
1891 return r;
1892 }
1893
1894 return 0;
1895}
1896
1897static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1898 int r;
1899
1900 assert(link);
1901 assert(carrier);
1902
1903 if (link == carrier)
1904 return 0;
1905
1906 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1907 return 0;
1908
1909 r = hashmap_ensure_allocated(h, NULL);
1910 if (r < 0)
1911 return r;
1912
1913 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1914 if (r < 0)
1915 return r;
1916
1917 return 0;
1918}
1919
1920static int link_new_bound_by_list(Link *link) {
1921 Manager *m;
1922 Link *carrier;
1923 Iterator i;
1924 int r;
1925 bool list_updated = false;
1926
1927 assert(link);
1928 assert(link->manager);
1929
1930 m = link->manager;
1931
b295beea 1932 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1933 if (!carrier->network)
1934 continue;
1935
1936 if (strv_isempty(carrier->network->bind_carrier))
1937 continue;
1938
1939 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1940 r = link_put_carrier(link, carrier, &link->bound_by_links);
1941 if (r < 0)
1942 return r;
1943
1944 list_updated = true;
1945 }
1946 }
1947
1948 if (list_updated)
84de38c5 1949 link_dirty(link);
0d4ad91d 1950
b295beea 1951 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1952 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1953 if (r < 0)
1954 return r;
1955
84de38c5 1956 link_dirty(carrier);
0d4ad91d
AR		 1957 }
1958
1959 return 0;
1960}
1961
1962static int link_new_bound_to_list(Link *link) {
1963 Manager *m;
1964 Link *carrier;
1965 Iterator i;
1966 int r;
1967 bool list_updated = false;
1968
1969 assert(link);
1970 assert(link->manager);
1971
1972 if (!link->network)
1973 return 0;
1974
1975 if (strv_isempty(link->network->bind_carrier))
1976 return 0;
1977
1978 m = link->manager;
1979
1980 HASHMAP_FOREACH (carrier, m->links, i) {
1981 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1982 r = link_put_carrier(link, carrier, &link->bound_to_links);
1983 if (r < 0)
1984 return r;
1985
1986 list_updated = true;
1987 }
1988 }
1989
1990 if (list_updated)
84de38c5 1991 link_dirty(link);
0d4ad91d
AR		 1992
1993 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1994 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1995 if (r < 0)
1996 return r;
1997
84de38c5 1998 link_dirty(carrier);
0d4ad91d
AR		 1999 }
2000
2001 return 0;
2002}
2003
2004static int link_new_carrier_maps(Link *link) {
2005 int r;
2006
2007 r = link_new_bound_by_list(link);
2008 if (r < 0)
2009 return r;
2010
2011 r = link_handle_bound_by_list(link);
2012 if (r < 0)
2013 return r;
2014
2015 r = link_new_bound_to_list(link);
2016 if (r < 0)
2017 return r;
2018
2019 r = link_handle_bound_to_list(link);
2020 if (r < 0)
2021 return r;
2022
2023 return 0;
2024}
2025
2026static void link_free_bound_to_list(Link *link) {
2027 Link *bound_to;
2028 Iterator i;
2029
2030 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2031 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2032
2033 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2034 link_dirty(bound_to);
0d4ad91d
AR		 2035 }
2036
2037 return;
2038}
2039
2040static void link_free_bound_by_list(Link *link) {
2041 Link *bound_by;
2042 Iterator i;
2043
2044 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2045 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2046
2047 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2048 link_dirty(bound_by);
0d4ad91d
AR		 2049 link_handle_bound_to_list(bound_by);
2050 }
2051 }
2052
2053 return;
2054}
2055
2056static void link_free_carrier_maps(Link *link) {
2057 bool list_updated = false;
2058
2059 assert(link);
2060
2061 if (!hashmap_isempty(link->bound_to_links)) {
2062 link_free_bound_to_list(link);
2063 list_updated = true;
2064 }
2065
2066 if (!hashmap_isempty(link->bound_by_links)) {
2067 link_free_bound_by_list(link);
2068 list_updated = true;
2069 }
2070
2071 if (list_updated)
84de38c5 2072 link_dirty(link);
0d4ad91d
AR		 2073
2074 return;
2075}
2076
5f707e12
YW		 2077static int link_append_to_master(Link *link, NetDev *netdev) {
2078 Link *master;
2079 int r;
2080
2081 assert(link);
2082 assert(netdev);
2083
2084 r = link_get(link->manager, netdev->ifindex, &master);
2085 if (r < 0)
2086 return r;
2087
2088 r = set_ensure_allocated(&master->slaves, NULL);
2089 if (r < 0)
2090 return r;
2091
2092 r = set_put(master->slaves, link);
2093 if (r < 0)
2094 return r;
2095
2096 link_ref(link);
2097 return 0;
2098}
2099
2100static void link_drop_from_master(Link *link, NetDev *netdev) {
2101 Link *master;
2102
2103 assert(link);
2104
2105 if (!link->manager || !netdev)
2106 return;
2107
2108 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2109 return;
2110
2111 link_unref(set_remove(master->slaves, link));
2112}
2113
2114static void link_detach_from_manager(Link *link) {
2115 if (!link || !link->manager)
2116 return;
2117
2118 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2119 link_clean(link);
2120
2121 /* The following must be called at last. */
2122 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2123 link_unref(link);
2124}
2125
0d4ad91d
AR		 2126void link_drop(Link *link) {
2127 if (!link || link->state == LINK_STATE_LINGER)
2128 return;
2129
2130 link_set_state(link, LINK_STATE_LINGER);
2131
2132 link_free_carrier_maps(link);
2133
5f707e12
YW		 2134 if (link->network) {
2135 link_drop_from_master(link, link->network->bridge);
2136 link_drop_from_master(link, link->network->bond);
2137 }
2138
6a7a4e4d 2139 log_link_debug(link, "Link removed");
0d4ad91d 2140
db2f8a2e 2141 (void) unlink(link->state_file);
c4397d94 2142 link_detach_from_manager(link);
0d4ad91d
AR		 2143}
2144
3f265037 2145static int link_joined(Link *link) {
f882c247
TG		 2146 int r;
2147
ef1ba606 2148 assert(link);
f5be5601 2149 assert(link->network);
dd3efc09 2150
0d4ad91d
AR		 2151 if (!hashmap_isempty(link->bound_to_links)) {
2152 r = link_handle_bound_to_list(link);
2153 if (r < 0)
2154 return r;
2155 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2156 r = link_up(link);
2157 if (r < 0) {
2158 link_enter_failed(link);
2159 return r;
2160 }
ef1ba606 2161 }
f882c247 2162
9ed794a3 2163 if (link->network->bridge) {
e1853b00 2164 r = link_set_bridge(link);
6a7a4e4d
LP		 2165 if (r < 0)
2166 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2167
2168 r = link_append_to_master(link, link->network->bridge);
2169 if (r < 0)
2170 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2171 }
2172
eb64b435 2173 if (link->network->bond) {
7fcee284 2174 r = link_set_bond(link);
eb64b435
SS		 2175 if (r < 0)
2176 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2177
45e11abf 2178 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2179 if (r < 0)
2180 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2181 }
2182
ffff9abe
TJ		 2183 if (link->network->use_br_vlan &&
2184 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2185 r = link_set_bridge_vlan(link);
2186 if (r < 0)
2187 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2188 }
2189
c1835a42
RM		 2190 /* Skip setting up addresses until it gets carrier,
2191 or it would try to set addresses twice,
2192 which is bad for non-idempotent steps. */
dad2d78e 2193 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2194 return 0;
2195
289e6774 2196 return link_request_set_addresses(link);
02b59d57
TG		 2197}
2198
302a796f 2199static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2200 int r;
2201
1746cf2a 2202 assert(link);
ef1ba606 2203 assert(link->network);
34bf3c00 2204 assert(link->enslaving > 0);
02b59d57 2205
313cefa1 2206 link->enslaving--;
52433f6b 2207
5da8149f 2208 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2209 return 1;
2210
1c4baffc 2211 r = sd_netlink_message_get_errno(m);
856f962c 2212 if (r < 0 && r != -EEXIST) {
a2fae7bb 2213 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2214 link_enter_failed(link);
2215 return 1;
ba179154 2216 } else
6a7a4e4d 2217 log_link_debug(link, "Joined netdev");
02b59d57 2218
34bf3c00 2219 if (link->enslaving == 0) {
3f265037 2220 link_joined(link);
34bf3c00 2221 }
02b59d57
TG		 2222
2223 return 1;
2224}
2225
3f265037 2226static int link_enter_join_netdev(Link *link) {
6a0a2f86 2227 NetDev *netdev;
672682a6 2228 Iterator i;
02b59d57
TG		 2229 int r;
2230
2231 assert(link);
2232 assert(link->network);
bd08ce56 2233 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2234
289e6774 2235 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2236
84de38c5 2237 link_dirty(link);
34bf3c00 2238 link->enslaving = 0;
02b59d57 2239
d9c67ea1 2240 if (link->network->bond) {
cbff7170
TJ		 2241 if (link->network->bond->state == NETDEV_STATE_READY &&
2242 link->network->bond->ifindex == link->master_ifindex)
2243 return link_joined(link);
2244
f2341e0a
LP		 2245 log_struct(LOG_DEBUG,
2246 LOG_LINK_INTERFACE(link),
2247 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2248 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2249
34bf3c00
YW		 2250 link->enslaving++;
2251
f2341e0a 2252 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2253 if (r < 0) {
f2341e0a
LP		 2254 log_struct_errno(LOG_WARNING, r,
2255 LOG_LINK_INTERFACE(link),
2256 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2257 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2258 link_enter_failed(link);
2259 return r;
2260 }
0ad6148e
MO		 2261 }
2262
d9c67ea1 2263 if (link->network->bridge) {
f2341e0a
LP		 2264 log_struct(LOG_DEBUG,
2265 LOG_LINK_INTERFACE(link),
2266 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2267 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2268
34bf3c00
YW		 2269 link->enslaving++;
2270
f2341e0a 2271 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2272 if (r < 0) {
f2341e0a
LP		 2273 log_struct_errno(LOG_WARNING, r,
2274 LOG_LINK_INTERFACE(link),
2275 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2276 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2277 link_enter_failed(link);
2278 return r;
2279 }
52433f6b
TG		 2280 }
2281
6cb955c6
AR		 2282 if (link->network->vrf) {
2283 log_struct(LOG_DEBUG,
2284 LOG_LINK_INTERFACE(link),
2285 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2286 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2287
34bf3c00
YW		 2288 link->enslaving++;
2289
6cb955c6
AR		 2290 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2291 if (r < 0) {
2292 log_struct_errno(LOG_WARNING, r,
2293 LOG_LINK_INTERFACE(link),
2294 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2295 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2296 link_enter_failed(link);
2297 return r;
2298 }
6cb955c6
AR		 2299 }
2300
6a0a2f86 2301 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2302
2b6db913
YW		 2303 if (netdev->ifindex > 0)
2304 /* Assume already enslaved. */
a63e5daa 2305 continue;
a63e5daa 2306
7033af49
YW		 2307 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2308 continue;
2309
f2341e0a
LP		 2310 log_struct(LOG_DEBUG,
2311 LOG_LINK_INTERFACE(link),
2312 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2313 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2314
34bf3c00
YW		 2315 link->enslaving++;
2316
f2341e0a 2317 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2318 if (r < 0) {
f2341e0a
LP		 2319 log_struct_errno(LOG_WARNING, r,
2320 LOG_LINK_INTERFACE(link),
2321 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2322 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2323 link_enter_failed(link);
2324 return r;
2325 }
326cb406
SS		 2326 }
2327
34bf3c00
YW		 2328 if (link->enslaving == 0)
2329 return link_joined(link);
2330
ef1ba606
TG		 2331 return 0;
2332}
2333
769d324c 2334static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2335 int r;
2336
765afd5c 2337 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2338 return 0;
2339
765afd5c
LP		 2340 /* We propagate the forwarding flag from one interface to the
2341 * global setting one way. This means: as long as at least one
2342 * interface was configured at any time that had IP forwarding
2343 * enabled the setting will stay on for good. We do this
2344 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2345 * somewhat in sync (see below). */
15dee3f0 2346
62e021a9 2347 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2348 if (r < 0)
765afd5c 2349 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2350
769d324c
LP		 2351 return 0;
2352}
2353
2354static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2355 int r;
2356
765afd5c 2357 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2358 return 0;
2359
61233823 2360 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2361 * packet forwarding setting: either packet forwarding is on
2362 * for all, or off for all. We hence don't bother with a
2363 * per-interface setting, but simply propagate the interface
2364 * flag, if it is set, to the global flag, one-way. Note that
2365 * while IPv4 would allow a per-interface flag, we expose the
2366 * same behaviour there and also propagate the setting from
2367 * one to all, to keep things simple (see above). */
15dee3f0 2368
62e021a9 2369 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2370 if (r < 0)
765afd5c 2371 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2372
2373 return 0;
2374}
2375
49092e22 2376static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2377 IPv6PrivacyExtensions s;
49092e22
SS		 2378 int r;
2379
1f0d9695 2380 s = link_ipv6_privacy_extensions(link);
66a6bd68 2381 if (s < 0)
49092e22
SS		 2382 return 0;
2383
62e021a9 2384 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2385 if (r < 0)
49092e22
SS		 2386 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2387
2388 return 0;
2389}
2390
4f2e437a 2391static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2392 int r;
2393
2394 /* Make this a NOP if IPv6 is not available */
2395 if (!socket_ipv6_is_supported())
2396 return 0;
2397
2398 if (link->flags & IFF_LOOPBACK)
2399 return 0;
2400
d68e2e59
LP		 2401 if (!link->network)
2402 return 0;
2403
62e021a9 2404 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2405 if (r < 0)
fe307276 2406 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2407
2408 return 0;
2409}
2410
8749cbcd 2411static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2412 int r;
2413
2414 /* Make this a NOP if IPv6 is not available */
2415 if (!socket_ipv6_is_supported())
2416 return 0;
2417
2418 if (link->flags & IFF_LOOPBACK)
2419 return 0;
2420
d68e2e59
LP		 2421 if (!link->network)
2422 return 0;
2423
8749cbcd
SS		 2424 if (link->network->ipv6_dad_transmits < 0)
2425 return 0;
2426
62e021a9 2427 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2428 if (r < 0)
8749cbcd 2429 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2430
2431 return 0;
2432}
2433
b69c3180 2434static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2435 int r;
2436
2437 /* Make this a NOP if IPv6 is not available */
2438 if (!socket_ipv6_is_supported())
2439 return 0;
2440
2441 if (link->flags & IFF_LOOPBACK)
2442 return 0;
2443
d68e2e59
LP		 2444 if (!link->network)
2445 return 0;
2446
b69c3180
SS		 2447 if (link->network->ipv6_hop_limit < 0)
2448 return 0;
2449
62e021a9 2450 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2451 if (r < 0)
b69c3180 2452 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2453
2454 return 0;
2455}
2456
11102cba 2457static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2458 int r;
2459
2460 /* Make this a NOP if IPv6 is not available */
2461 if (!socket_ipv6_is_supported())
2462 return 0;
2463
2464 if (link->flags & IFF_LOOPBACK)
2465 return 0;
2466
2467 if (link->network->ipv6_mtu == 0)
2468 return 0;
2469
62e021a9 2470 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2471 if (r < 0)
2472 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2473
2474 return 0;
2475}
2476
30226d27
TJ		 2477static bool link_is_static_address_configured(Link *link, Address *address) {
2478 Address *net_address;
2479
2480 assert(link);
2481 assert(address);
2482
2483 if (!link->network)
2484 return false;
2485
2486 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2487 if (address_equal(net_address, address))
2488 return true;
2489
2490 return false;
2491}
2492
7ecf0c3e
TJ		 2493static bool link_is_static_route_configured(Link *link, Route *route) {
2494 Route *net_route;
2495
2496 assert(link);
2497 assert(route);
2498
2499 if (!link->network)
2500 return false;
2501
2502 LIST_FOREACH(routes, net_route, link->network->static_routes)
2503 if (route_equal(net_route, route))
2504 return true;
2505
2506 return false;
2507}
2508
db51778f
YW		 2509static bool link_address_is_dynamic(Link *link, Address *address) {
2510 Route *route;
2511 Iterator i;
2512
2513 assert(link);
2514 assert(address);
2515
2516 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2517 return true;
2518
2519 /* Even when the address is leased from a DHCP server, networkd assign the address
2520 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2521 * corresponding routes with RTPROT_DHCP. */
2522 SET_FOREACH(route, link->routes_foreign, i) {
2523 if (route->protocol != RTPROT_DHCP)
2524 continue;
2525
2526 if (address->family != route->family)
2527 continue;
2528
2529 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2530 return true;
2531 }
2532
2533 return false;
2534}
2535
5e5b137a
TG		 2536static int link_drop_foreign_config(Link *link) {
2537 Address *address;
2538 Route *route;
2539 Iterator i;
2540 int r;
2541
2542 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2543 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2544 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2545 continue;
2546
db51778f
YW		 2547 if (link_address_is_dynamic(link, address)) {
2548 if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2549 continue;
2550 } else if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2551 continue;
2552
30226d27
TJ		 2553 if (link_is_static_address_configured(link, address)) {
2554 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2555 if (r < 0)
2556 return log_link_error_errno(link, r, "Failed to add address: %m");
2557 } else {
63ae0569 2558 r = address_remove(address, link, NULL);
30226d27
TJ		 2559 if (r < 0)
2560 return r;
2561 }
5e5b137a
TG		 2562 }
2563
2564 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2565 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2566 if (route->protocol == RTPROT_KERNEL)
2567 continue;
2568
db51778f
YW		 2569 if (route->protocol == RTPROT_STATIC &&
2570 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2571 continue;
2572
2573 if (route->protocol == RTPROT_DHCP &&
2574 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2575 continue;
2576
7ecf0c3e
TJ		 2577 if (link_is_static_route_configured(link, route)) {
2578 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2579 if (r < 0)
2580 return r;
2581 } else {
4645ad47 2582 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2583 if (r < 0)
2584 return r;
2585 }
5e5b137a
TG		 2586 }
2587
2588 return 0;
2589}
2590
3104883d 2591static int link_drop_config(Link *link) {
410a7f15 2592 Address *address, *pool_address;
3104883d
SS		 2593 Route *route;
2594 Iterator i;
2595 int r;
2596
2597 SET_FOREACH(address, link->addresses, i) {
2598 /* we consider IPv6LL addresses to be managed by the kernel */
2599 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2600 continue;
2601
63ae0569 2602 r = address_remove(address, link, NULL);
3104883d
SS		 2603 if (r < 0)
2604 return r;
410a7f15
RM		 2605
2606 /* If this address came from an address pool, clean up the pool */
2607 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2608 if (address_equal(address, pool_address)) {
2609 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2610 address_free(pool_address);
2611 break;
2612 }
2613 }
3104883d
SS		 2614 }
2615
2616 SET_FOREACH(route, link->routes, i) {
2617 /* do not touch routes managed by the kernel */
2618 if (route->protocol == RTPROT_KERNEL)
2619 continue;
2620
4645ad47 2621 r = route_remove(route, link, NULL);
3104883d
SS		 2622 if (r < 0)
2623 return r;
2624 }
2625
c69305ff
LP		 2626 ndisc_flush(link);
2627
3104883d
SS		 2628 return 0;
2629}
2630
a748b692 2631static int link_configure(Link *link) {
02b59d57
TG		 2632 int r;
2633
ef1ba606 2634 assert(link);
b22d8a00 2635 assert(link->network);
bd08ce56 2636 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2637
cab042b8 2638 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
93ea7750 2639 return link_configure_can(link);
92c918b0 2640
02e28621
ДГ		 2641 /* Drop foreign config, but ignore loopback or critical devices.
2642 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2643 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2644 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2645 r = link_drop_foreign_config(link);
2646 if (r < 0)
2647 return r;
2648 }
5e5b137a 2649
23d8b221
SS		 2650 r = link_set_proxy_arp(link);
2651 if (r < 0)
2652 return r;
2653
a0e5c15d
FK		 2654 r = ipv6_proxy_ndp_addresses_configure(link);
2655 if (r < 0)
2656 return r;
2657
769d324c
LP		 2658 r = link_set_ipv4_forward(link);
2659 if (r < 0)
2660 return r;
2661
2662 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2663 if (r < 0)
2664 return r;
2665
49092e22
SS		 2666 r = link_set_ipv6_privacy_extensions(link);
2667 if (r < 0)
2668 return r;
2669
4f2e437a
SS		 2670 r = link_set_ipv6_accept_ra(link);
2671 if (r < 0)
2672 return r;
2673
8749cbcd
SS		 2674 r = link_set_ipv6_dad_transmits(link);
2675 if (r < 0)
2676 return r;
b69c3180
SS		 2677
2678 r = link_set_ipv6_hop_limit(link);
2679 if (r < 0)
2680 return r;
8749cbcd 2681
99d2baa2
SS		 2682 r = link_set_flags(link);
2683 if (r < 0)
2684 return r;
2685
11102cba
SS		 2686 r = link_set_ipv6_mtu(link);
2687 if (r < 0)
2688 return r;
2689
910feb78 2690 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2691 r = ipv4ll_configure(link);
eb34d4af
TG		 2692 if (r < 0)
2693 return r;
2694 }
2695
78c958f8 2696 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2697 r = dhcp4_set_promote_secondaries(link);
2698 if (r < 0)
2699 return r;
2700
3c9b8860 2701 r = dhcp4_configure(link);
eb34d4af
TG		 2702 if (r < 0)
2703 return r;
eb34d4af
TG		 2704 }
2705
78c958f8 2706 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2707 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2708 if (r < 0)
2709 return r;
2710
2711 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2712 if (r < 0)
2713 return r;
dd43110f
TG		 2714 }
2715
62379e88
TG		 2716 if (link_dhcp6_enabled(link) ||
2717 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2718 r = dhcp6_configure(link);
2719 if (r < 0)
2720 return r;
2721 }
2722
2723 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2724 r = ndisc_configure(link);
4138fb2c
PF		 2725 if (r < 0)
2726 return r;
2727 }
2728
7465dd22
PF		 2729 if (link_radv_enabled(link)) {
2730 r = radv_configure(link);
2731 if (r < 0)
2732 return r;
2733 }
2734
8e1ad1ea 2735 if (link_lldp_rx_enabled(link)) {
7f853950 2736 r = link_lldp_rx_configure(link);
273eec24
LP		 2737 if (r < 0)
2738 return r;
ce43e484
SS		 2739 }
2740
f6fcc1c2 2741 r = link_configure_mtu(link);
40288ece
YW		 2742 if (r < 0)
2743 return r;
44b598a1 2744
9f6e82e6
YW		 2745 r = link_configure_addrgen_mode(link);
2746 if (r < 0)
2747 return r;
0e2fdb83 2748
55dc8c4a
YW		 2749 return link_configure_after_setting_mtu(link);
2750}
2751
2752static int link_configure_after_setting_mtu(Link *link) {
2753 int r;
2754
2755 assert(link);
2756 assert(link->network);
bd08ce56 2757 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2758
2759 if (link->setting_mtu)
2760 return 0;
2761
dad2d78e 2762 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2763 r = link_acquire_conf(link);
2764 if (r < 0)
2765 return r;
cc544d5f 2766 }
1e9be60b 2767
3f265037 2768 return link_enter_join_netdev(link);
505f8da7
TG		 2769}
2770
27dfc982
YW		 2771static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2772 assert(duid);
2773
2774 if (duid->raw_data_len > 0)
2775 return 0;
2776
2777 if (duid->type != DUID_TYPE_UUID)
2778 return -EINVAL;
2779
2780 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2781 duid->raw_data_len = sizeof(sd_id128_t);
2782
2783 return 1;
2784}
2785
2786int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2787 Manager *manager = userdata;
2788 const sd_bus_error *e;
2789 const void *a;
2790 size_t sz;
2791 DUID *duid;
2792 Link *link;
2793 int r;
2794
2795 assert(m);
2796 assert(manager);
2797
2798 e = sd_bus_message_get_error(m);
2799 if (e) {
2800 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2801 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2802 e->message);
2803 goto configure;
2804 }
2805
2806 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2807 if (r < 0)
2808 goto configure;
2809
2810 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2811 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2812 goto configure;
2813 }
2814
2815 memcpy(&manager->product_uuid, a, sz);
2816 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2817 (void) duid_set_uuid(duid, manager->product_uuid);
2818
2819 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2820
2821configure:
2822 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2823 r = link_configure(link);
2824 if (r < 0)
2825 log_link_error_errno(link, r, "Failed to configure link: %m");
2826 }
2827
2828 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2829
2830 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2831 * even if the method fails. */
2832 manager->has_product_uuid = true;
2833
2834 return 1;
2835}
2836
2837static bool link_requires_uuid(Link *link) {
2838 const DUID *duid;
2839
2840 assert(link);
2841 assert(link->manager);
2842 assert(link->network);
2843
2844 duid = link_get_duid(link);
2845 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2846 return false;
2847
2848 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2849 return true;
2850
2851 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2852 return true;
2853
2854 return false;
2855}
2856
2857static int link_configure_duid(Link *link) {
2858 Manager *m;
2859 DUID *duid;
2860 int r;
2861
2862 assert(link);
2863 assert(link->manager);
2864 assert(link->network);
2865
2866 m = link->manager;
2867 duid = link_get_duid(link);
2868
2869 if (!link_requires_uuid(link))
2870 return 1;
2871
2872 if (m->has_product_uuid) {
2873 (void) duid_set_uuid(duid, m->product_uuid);
2874 return 1;
2875 }
2876
2877 if (!m->links_requesting_uuid) {
2878 r = manager_request_product_uuid(m, link);
2879 if (r < 0) {
2880 if (r == -ENOMEM)
2881 return r;
2882
ab4dd984
ZJS		 2883 log_link_warning_errno(link, r,
2884 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2885 return 1;
2886 }
2887 } else {
2888 r = set_put(m->links_requesting_uuid, link);
2889 if (r < 0)
2890 return log_oom();
2891
2892 r = set_put(m->duids_requesting_uuid, duid);
2893 if (r < 0)
2894 return log_oom();
2895 }
2896
2897 return 0;
2898}
2899
e6bf7774 2900static int link_initialized_and_synced(Link *link) {
505f8da7 2901 Network *network;
505f8da7
TG		 2902 int r;
2903
2904 assert(link);
2905 assert(link->ifname);
2906 assert(link->manager);
2907
bd08ce56
YW		 2908 /* We may get called either from the asynchronous netlink callback,
2909 * or directly for link_add() if running in a container. See link_add(). */
2910 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2911 return 0;
505f8da7 2912
6a7a4e4d 2913 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2914 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2915
0d4ad91d
AR		 2916 r = link_new_bound_by_list(link);
2917 if (r < 0)
2918 return r;
2919
2920 r = link_handle_bound_by_list(link);
2921 if (r < 0)
2922 return r;
2923
c4a03a56 2924 if (!link->network) {
51517f9e 2925 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2926 &link->mac, &network);
2927 if (r == -ENOENT) {
2928 link_enter_unmanaged(link);
4232cf04 2929 return 0;
a09dc546
DM		 2930 } else if (r == 0 && network->unmanaged) {
2931 link_enter_unmanaged(link);
2932 return 0;
c4a03a56
TG		 2933 } else if (r < 0)
2934 return r;
505f8da7 2935
c4a03a56
TG		 2936 if (link->flags & IFF_LOOPBACK) {
2937 if (network->link_local != ADDRESS_FAMILY_NO)
2938 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2939
c4a03a56
TG		 2940 if (network->dhcp != ADDRESS_FAMILY_NO)
2941 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2942
c4a03a56
TG		 2943 if (network->dhcp_server)
2944 log_link_debug(link, "Ignoring DHCP server for loopback link");
2945 }
bd2efe92 2946
7d342c03 2947 r = network_apply(network, link);
c4a03a56
TG		 2948 if (r < 0)
2949 return r;
2950 }
505f8da7 2951
0d4ad91d
AR		 2952 r = link_new_bound_to_list(link);
2953 if (r < 0)
2954 return r;
2955
27dfc982
YW		 2956 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2957 * link_configure() is called later asynchronously. */
2958 r = link_configure_duid(link);
2959 if (r <= 0)
2960 return r;
2961
a748b692
TG		 2962 r = link_configure(link);
2963 if (r < 0)
2964 return r;
2965
4232cf04 2966 return 0;
505f8da7
TG		 2967}
2968
302a796f
YW		 2969static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2970 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2971 return 1;
2972}
2973
51517f9e 2974int link_initialized(Link *link, sd_device *device) {
4afd3348 2975 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2976 int r;
2977
2978 assert(link);
2979 assert(link->manager);
2980 assert(link->manager->rtnl);
2981 assert(device);
2982
8434fd5c 2983 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2984 return 0;
2985
51517f9e 2986 if (link->sd_device)
679b3605
TG		 2987 return 0;
2988
79008bdd 2989 log_link_debug(link, "udev initialized link");
bd08ce56 2990 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2991
51517f9e 2992 link->sd_device = sd_device_ref(device);
4f561e8e 2993
3c9b8860
TG		 2994 /* udev has initialized the link, but we don't know if we have yet
2995 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2996 * when it returns we know that the pending NEWLINKs have already been
2997 * processed and that we are up-to-date */
4f561e8e 2998
3c9b8860
TG		 2999 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3000 link->ifindex);
4f561e8e
TG		 3001 if (r < 0)
3002 return r;
3003
302a796f
YW		 3004 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3005 link_netlink_destroy_callback, link);
4f561e8e
TG		 3006 if (r < 0)
3007 return r;
3008
5da8149f
TG		 3009 link_ref(link);
3010
4f561e8e
TG		 3011 return 0;
3012}
3013
c4a03a56 3014static int link_load(Link *link) {
0bc70f1d
TG		 3015 _cleanup_free_ char *network_file = NULL,
3016 *addresses = NULL,
f703cc2c 3017 *routes = NULL,
0bc70f1d
TG		 3018 *dhcp4_address = NULL,
3019 *ipv4ll_address = NULL;
3020 union in_addr_union address;
f703cc2c 3021 union in_addr_union route_dst;
c598ac76 3022 const char *p;
c4a03a56
TG		 3023 int r;
3024
3025 assert(link);
3026
aa8fbc74 3027 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3028 "NETWORK_FILE", &network_file,
3029 "ADDRESSES", &addresses,
f703cc2c 3030 "ROUTES", &routes,
0bc70f1d 3031 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3032 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3033 if (r < 0 && r != -ENOENT)
3034 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3035
3036 if (network_file) {
3037 Network *network;
3038 char *suffix;
3039
3040 /* drop suffix */
3041 suffix = strrchr(network_file, '.');
3042 if (!suffix) {
3043 log_link_debug(link, "Failed to get network name from %s", network_file);
3044 goto network_file_fail;
3045 }
3046 *suffix = '\0';
3047
3048 r = network_get_by_name(link->manager, basename(network_file), &network);
3049 if (r < 0) {
3050 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3051 goto network_file_fail;
3052 }
3053
7d342c03 3054 r = network_apply(network, link);
c4a03a56
TG		 3055 if (r < 0)
3056 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3057 }
3058
3059network_file_fail:
3060
3061 if (addresses) {
c598ac76 3062 p = addresses;
c4a03a56 3063
c598ac76
TG		 3064 for (;;) {
3065 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3066 char *prefixlen_str;
3067 int family;
3068 unsigned char prefixlen;
c4a03a56 3069
c598ac76
TG		 3070 r = extract_first_word(&p, &address_str, NULL, 0);
3071 if (r < 0) {
3072 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3073 continue;
928bc597
TA		 3074 }
3075 if (r == 0)
c598ac76
TG		 3076 break;
3077
3078 prefixlen_str = strchr(address_str, '/');
c4a03a56 3079 if (!prefixlen_str) {
c598ac76 3080 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3081 continue;
3082 }
3083
313cefa1 3084 *prefixlen_str++ = '\0';
c4a03a56
TG		 3085
3086 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3087 if (r != 1) {
3088 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3089 continue;
3090 }
3091
c598ac76 3092 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3093 if (r < 0) {
c598ac76 3094 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3095 continue;
3096 }
3097
3098 r = address_add(link, family, &address, prefixlen, NULL);
3099 if (r < 0)
3100 return log_link_error_errno(link, r, "Failed to add address: %m");
3101 }
3102 }
3103
f703cc2c 3104 if (routes) {
74544b4e
TA		 3105 p = routes;
3106
c598ac76 3107 for (;;) {
f833694d 3108 Route *route;
c598ac76 3109 _cleanup_free_ char *route_str = NULL;
4afd3348 3110 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3111 usec_t lifetime;
f703cc2c
TG		 3112 char *prefixlen_str;
3113 int family;
3114 unsigned char prefixlen, tos, table;
3115 uint32_t priority;
3116
c598ac76
TG		 3117 r = extract_first_word(&p, &route_str, NULL, 0);
3118 if (r < 0) {
3119 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3120 continue;
928bc597
TA		 3121 }
3122 if (r == 0)
c598ac76
TG		 3123 break;
3124
3125 prefixlen_str = strchr(route_str, '/');
f703cc2c 3126 if (!prefixlen_str) {
c598ac76 3127 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3128 continue;
3129 }
3130
313cefa1 3131 *prefixlen_str++ = '\0';
f703cc2c 3132
f833694d
TG		 3133 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3134 if (r != 5) {
3135 log_link_debug(link,
3136 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3137 prefixlen_str);
f703cc2c
TG		 3138 continue;
3139 }
3140
c598ac76 3141 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3142 if (r < 0) {
c598ac76 3143 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3144 continue;
3145 }
3146
f833694d 3147 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3148 if (r < 0)
3149 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3150
f02ba163 3151 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3152 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3153 0, route_expire_handler, route);
3154 if (r < 0)
3155 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3156 }
3157
3158 route->lifetime = lifetime;
3159 sd_event_source_unref(route->expire);
1cc6c93a 3160 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3161 }
3162 }
3163
0bc70f1d
TG		 3164 if (dhcp4_address) {
3165 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3166 if (r < 0) {
b68d26b8 3167 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3168 goto dhcp4_address_fail;
3169 }
3170
b1c626f6 3171 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3172 if (r < 0)
b68d26b8 3173 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3174
3175 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3176 if (r < 0)
b68d26b8 3177 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3178 }
3179
3180dhcp4_address_fail:
3181
3182 if (ipv4ll_address) {
3183 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3184 if (r < 0) {
b68d26b8 3185 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3186 goto ipv4ll_address_fail;
3187 }
3188
3189 r = sd_ipv4ll_new(&link->ipv4ll);
3190 if (r < 0)
b68d26b8 3191 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3192
3193 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3194 if (r < 0)
b68d26b8 3195 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3196 }
3197
3198ipv4ll_address_fail:
3199
c4a03a56
TG		 3200 return 0;
3201}
3202
1c4baffc 3203int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3204 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3205 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3206 Link *link;
5a937ea2 3207 int r;
505f8da7
TG		 3208
3209 assert(m);
fbbeb65a 3210 assert(m->rtnl);
505f8da7
TG		 3211 assert(message);
3212 assert(ret);
3213
3214 r = link_new(m, message, ret);
3215 if (r < 0)
3216 return r;
3217
3218 link = *ret;
3219
6a7a4e4d 3220 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3221
c4a03a56
TG		 3222 r = link_load(link);
3223 if (r < 0)
3224 return r;
3225
75f86906 3226 if (detect_container() <= 0) {
505f8da7 3227 /* not in a container, udev will be around */
ae06ab10 3228 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3229 r = sd_device_new_from_device_id(&device, ifindex_str);
3230 if (r < 0) {
3231 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3232 goto failed;
3233 }
505f8da7 3234
5a937ea2 3235 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3236 if (r < 0) {
3237 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3238 goto failed;
3239 }
5a937ea2 3240 if (r == 0) {
505f8da7 3241 /* not yet ready */
79008bdd 3242 log_link_debug(link, "link pending udev initialization...");
505f8da7 3243 return 0;
3c4cb064 3244 }
505f8da7 3245
299ad32d
YW		 3246 r = device_is_renaming(device);
3247 if (r < 0) {
3248 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3249 goto failed;
3250 }
3251 if (r > 0) {
3252 log_link_debug(link, "Interface is under renaming, pending initialization.");
3253 return 0;
3254 }
3255
4f561e8e
TG		 3256 r = link_initialized(link, device);
3257 if (r < 0)
5c416fc4 3258 goto failed;
4f561e8e 3259 } else {
e6bf7774 3260 r = link_initialized_and_synced(link);
4f561e8e 3261 if (r < 0)
5c416fc4 3262 goto failed;
4f561e8e 3263 }
505f8da7 3264
a748b692 3265 return 0;
5c416fc4
TG		 3266failed:
3267 link_enter_failed(link);
3268 return r;
a748b692
TG		 3269}
3270
c601ebf7 3271int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3272 int r;
3273
3274 assert(link);
3275
3276 log_link_info(link, "Gained IPv6LL");
3277
c601ebf7 3278 link->ipv6ll_address = *address;
e7ab854c
TG		 3279 link_check_ready(link);
3280
b9ea3d2e 3281 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3282 r = link_acquire_ipv6_conf(link);
3283 if (r < 0) {
3284 link_enter_failed(link);
3285 return r;
3286 }
3287 }
3288
3289 return 0;
3290}
3291
9c0a72f9
TG		 3292static int link_carrier_gained(Link *link) {
3293 int r;
3294
3295 assert(link);
3296
b9ea3d2e 3297 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3298 r = link_acquire_conf(link);
3299 if (r < 0) {
3300 link_enter_failed(link);
3301 return r;
3302 }
6fc25497 3303
289e6774 3304 r = link_request_set_addresses(link);
6fc25497
SS		 3305 if (r < 0)
3306 return r;
9c0a72f9
TG		 3307 }
3308
0d4ad91d
AR		 3309 r = link_handle_bound_by_list(link);
3310 if (r < 0)
3311 return r;
3312
9c0a72f9
TG		 3313 return 0;
3314}
3315
3316static int link_carrier_lost(Link *link) {
3317 int r;
3318
3319 assert(link);
3320
25e992ba 3321 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3322 return 0;
3323
fbdb6605 3324 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3325 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3326 * configuration and stop the clients as well. */
97e7fb39
SS		 3327 if (link->setting_mtu)
3328 return 0;
3329
95355a28 3330 r = link_stop_clients(link, false);
9c0a72f9
TG		 3331 if (r < 0) {
3332 link_enter_failed(link);
3333 return r;
3334 }
3335
28464ae0
SS		 3336 if (link_dhcp4_server_enabled(link))
3337 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3338
3104883d
SS		 3339 r = link_drop_config(link);
3340 if (r < 0)
3341 return r;
3342
f258e948
MP		 3343 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3344 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3345 r = link_drop_foreign_config(link);
3346 if (r < 0)
3347 return r;
3348 }
3104883d 3349
0d4ad91d
AR		 3350 r = link_handle_bound_by_list(link);
3351 if (r < 0)
3352 return r;
3353
9c0a72f9
TG		 3354 return 0;
3355}
3356
3357int link_carrier_reset(Link *link) {
3358 int r;
3359
3360 assert(link);
3361
3362 if (link_has_carrier(link)) {
3363 r = link_carrier_lost(link);
3364 if (r < 0)
3365 return r;
3366
3367 r = link_carrier_gained(link);
3368 if (r < 0)
3369 return r;
3370
6a7a4e4d 3371 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3372 }
3373
3374 return 0;
3375}
3376
1c4baffc 3377int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3378 struct ether_addr mac;
ca4e095a 3379 const char *ifname;
afe7fd56 3380 uint32_t mtu;
a61bb41c 3381 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3382 int old_master, r;
22936833 3383
dd3efc09 3384 assert(link);
b8941f74 3385 assert(link->ifname);
22936833
TG		 3386 assert(m);
3387
7619683b 3388 if (link->state == LINK_STATE_LINGER) {
5238e957 3389 log_link_info(link, "Link re-added");
289e6774 3390 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3391
3392 r = link_new_carrier_maps(link);
3393 if (r < 0)
3394 return r;
7619683b
TG		 3395 }
3396
1c4baffc 3397 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3398 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3399 Manager *manager = link->manager;
b8941f74 3400
30de2b89 3401 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3402
30de2b89
YW		 3403 link_drop(link);
3404 r = link_add(manager, m, &link);
3405 if (r < 0)
3406 return r;
b8941f74
TG		 3407 }
3408
1c4baffc 3409 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3410 if (r >= 0 && mtu > 0) {
3411 link->mtu = mtu;
4e964aa0 3412 if (link->original_mtu == 0) {
afe7fd56 3413 link->original_mtu = mtu;
6a7a4e4d 3414 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3415 }
3416
3417 if (link->dhcp_client) {
3c9b8860
TG		 3418 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3419 link->mtu);
fc95c359
YW		 3420 if (r < 0)
3421 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3422 }
7465dd22
PF		 3423
3424 if (link->radv) {
3425 r = sd_radv_set_mtu(link->radv, link->mtu);
3426 if (r < 0)
3427 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3428 }
9842de0d 3429 }
69629de9 3430
e9189a1f
TG		 3431 /* The kernel may broadcast NEWLINK messages without the MAC address
3432 set, simply ignore them. */
1c4baffc 3433 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3434 if (r >= 0) {
3c9b8860
TG		 3435 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3436 ETH_ALEN)) {
c49b33ac 3437
3c9b8860
TG		 3438 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3439 ETH_ALEN);
c49b33ac 3440
79008bdd 3441 log_link_debug(link, "MAC address: "
20861203
TG		 3442 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3443 mac.ether_addr_octet[0],
3444 mac.ether_addr_octet[1],
3445 mac.ether_addr_octet[2],
3446 mac.ether_addr_octet[3],
3447 mac.ether_addr_octet[4],
3448 mac.ether_addr_octet[5]);
c49b33ac 3449
20861203
TG		 3450 if (link->ipv4ll) {
3451 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3452 if (r < 0)
3453 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3454 }
c49b33ac 3455
20861203 3456 if (link->dhcp_client) {
3c9b8860 3457 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3458 (const uint8_t *) &link->mac,
3459 sizeof (link->mac),
3460 ARPHRD_ETHER);
6a7a4e4d
LP		 3461 if (r < 0)
3462 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3463
fff1f40c
YW		 3464 r = dhcp4_set_client_identifier(link);
3465 if (r < 0)
3466 return r;
c49b33ac 3467 }
4138fb2c
PF		 3468
3469 if (link->dhcp6_client) {
f24648a6 3470 const DUID* duid = link_get_duid(link);
8341a5c3 3471
4138fb2c 3472 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3473 (const uint8_t *) &link->mac,
3474 sizeof (link->mac),
3475 ARPHRD_ETHER);
6a7a4e4d
LP		 3476 if (r < 0)
3477 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3478
8217ed5e
TH		 3479 if (link->network->iaid_set) {
3480 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3481 link->network->iaid);
3482 if (r < 0)
3483 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3484 }
413708d1 3485
8341a5c3
ZJS		 3486 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3487 duid->type,
3488 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3489 duid->raw_data_len);
413708d1
VK		 3490 if (r < 0)
3491 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3492 }
7465dd22
PF		 3493
3494 if (link->radv) {
3495 r = sd_radv_set_mac(link->radv, &link->mac);
3496 if (r < 0)
3497 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3498 }
420d2058
SS		 3499
3500 if (link->ndisc) {
3501 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3502 if (r < 0)
3503 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3504 }
c49b33ac 3505 }
4f882b2a
TG		 3506 }
3507
bb262ef0
YW		 3508 old_master = link->master_ifindex;
3509 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3510
a61bb41c
TG		 3511 had_carrier = link_has_carrier(link);
3512
bb262ef0 3513 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3514 if (r < 0)
3515 return r;
3516
273eec24
LP		 3517 r = link_update_lldp(link);
3518 if (r < 0)
3519 return r;
3520
a61bb41c
TG		 3521 carrier_gained = !had_carrier && link_has_carrier(link);
3522 carrier_lost = had_carrier && !link_has_carrier(link);
3523
3524 if (carrier_gained) {
6a7a4e4d 3525 log_link_info(link, "Gained carrier");
a61bb41c 3526
9c0a72f9
TG		 3527 r = link_carrier_gained(link);
3528 if (r < 0)
3529 return r;
a61bb41c 3530 } else if (carrier_lost) {
6a7a4e4d 3531 log_link_info(link, "Lost carrier");
a61bb41c 3532
9c0a72f9
TG		 3533 r = link_carrier_lost(link);
3534 if (r < 0)
a61bb41c 3535 return r;
a61bb41c
TG		 3536 }
3537
3538 return 0;
dd3efc09 3539}
fe8db0c5 3540
b295beea
LP		 3541static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3542 bool space = false;
3543 Iterator i;
3544 Link *link;
3545
3546 assert(f);
3547 assert(prefix);
3548
3549 if (hashmap_isempty(h))
3550 return;
3551
0d536673 3552 fputs(prefix, f);
b295beea
LP		 3553 HASHMAP_FOREACH(link, h, i) {
3554 if (space)
0d536673 3555 fputc(' ', f);
b295beea
LP		 3556
3557 fprintf(f, "%i", link->ifindex);
3558 space = true;
3559 }
3560
0d536673 3561 fputc('\n', f);
b295beea
LP		 3562}
3563
fe8db0c5 3564int link_save(Link *link) {
68a8723c 3565 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3566 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3567 const char *admin_state, *oper_state;
e7780c8d 3568 Address *a;
c1eb9872 3569 Route *route;
e7780c8d 3570 Iterator i;
fe8db0c5
TG		 3571 int r;
3572
3573 assert(link);
3574 assert(link->state_file);
68a8723c 3575 assert(link->lease_file);
bbf7c048
TG		 3576 assert(link->manager);
3577
370e9930 3578 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3579 (void) unlink(link->state_file);
370e9930
TG		 3580 return 0;
3581 }
3582
34437b4f
LP		 3583 link_lldp_save(link);
3584
deb2e523
TG		 3585 admin_state = link_state_to_string(link->state);
3586 assert(admin_state);
3587
e375dcde
TG		 3588 oper_state = link_operstate_to_string(link->operstate);
3589 assert(oper_state);
deb2e523 3590
fe8db0c5
TG		 3591 r = fopen_temporary(link->state_file, &f, &temp_path);
3592 if (r < 0)
6a7a4e4d 3593 goto fail;
fe8db0c5 3594
5512a963 3595 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3596
3597 fprintf(f,
3598 "# This is private data. Do not parse.\n"
deb2e523 3599 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3600 "OPER_STATE=%s\n",
3601 admin_state, oper_state);
fe8db0c5 3602
bcb7a07e 3603 if (link->network) {
fe0e16db
YW		 3604 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3605 const char *dhcp_domainname = NULL, *p;
07bdc70d 3606 sd_dhcp6_lease *dhcp6_lease = NULL;
5512a963 3607 unsigned j;
fe0e16db 3608 bool space;
07bdc70d 3609
c1a38904
MTL		 3610 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3611 yes_no(link->network->required_for_online));
3612
4ac77d63
YW		 3613 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3614 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3615
07bdc70d 3616 if (link->dhcp6_client) {
4058d339
TG		 3617 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3618 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3619 log_link_debug(link, "No DHCPv6 lease");
3620 }
b0e39c82 3621
adc5b2e2
TG		 3622 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3623
0d536673 3624 fputs("DNS=", f);
ea352b40 3625 space = false;
5512a963
LP		 3626
3627 for (j = 0; j < link->network->n_dns; j++) {
3628 _cleanup_free_ char *b = NULL;
3629
3630 r = in_addr_to_string(link->network->dns[j].family,
3631 &link->network->dns[j].address, &b);
3632 if (r < 0) {
3633 log_debug_errno(r, "Failed to format address, ignoring: %m");
3634 continue;
3635 }
3636
3637 if (space)
0d536673
LP		 3638 fputc(' ', f);
3639 fputs(b, f);
5512a963
LP		 3640 space = true;
3641 }
d5314fff 3642
27cb34f5 3643 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3644 link->dhcp_lease) {
3645 const struct in_addr *addresses;
3646
3647 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3648 if (r > 0)
3649 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3650 space = true;
07bdc70d
PF		 3651 }
3652
27cb34f5 3653 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3654 struct in6_addr *in6_addrs;
3655
3656 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3657 if (r > 0) {
3658 if (space)
0d536673 3659 fputc(' ', f);
07bdc70d 3660 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3661 space = true;
3662 }
3663 }
3664
3665 /* Make sure to flush out old entries before we use the NDISC data */
3666 ndisc_vacuum(link);
3667
b296797f 3668 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3669 NDiscRDNSS *dd;
3670
3671 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3672 if (space)
0d536673 3673 fputc(' ', f);
1e7a0e21
LP		 3674
3675 serialize_in6_addrs(f, &dd->address, 1);
3676 space = true;
b0e39c82
TG		 3677 }
3678 }
3679
0d536673 3680 fputc('\n', f);
b0e39c82 3681
0d536673 3682 fputs("NTP=", f);
ea352b40 3683 space = false;
3df9bec5 3684 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3685
27cb34f5 3686 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3687 link->dhcp_lease) {
3688 const struct in_addr *addresses;
3689
3690 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3691 if (r > 0)
3692 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3693 space = true;
07bdc70d
PF		 3694 }
3695
27cb34f5 3696 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3697 struct in6_addr *in6_addrs;
3698 char **hosts;
07bdc70d
PF		 3699
3700 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3701 &in6_addrs);
3702 if (r > 0) {
3703 if (space)
0d536673 3704 fputc(' ', f);
07bdc70d
PF		 3705 serialize_in6_addrs(f, in6_addrs, r);
3706 space = true;
3707 }
3708
3709 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3710 if (r > 0)
3711 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3712 }
3713
0d536673 3714 fputc('\n', f);
bd8f6538 3715
b2a81c0b 3716 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3717 if (link->dhcp_lease) {
b2a81c0b 3718 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3719 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3720 }
b2a81c0b
LP		 3721 if (dhcp6_lease)
3722 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3723 }
3724
fe0e16db
YW		 3725 fputs("DOMAINS=", f);
3726 space = false;
3727 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3728 fputs_with_space(f, p, NULL, &space);
07bdc70d 3729
1e7a0e21
LP		 3730 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3731 NDiscDNSSL *dd;
9b4d1882 3732
1e7a0e21
LP		 3733 if (dhcp_domainname)
3734 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3735 if (dhcp_domains)
3736 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3737 if (dhcp6_domains)
3738 fputstrv(f, dhcp6_domains, NULL, &space);
3739
3740 SET_FOREACH(dd, link->ndisc_dnssl, i)
3741 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3742 }
b2a81c0b 3743
0d536673 3744 fputc('\n', f);
6192b846 3745
fe0e16db
YW		 3746 fputs("ROUTE_DOMAINS=", f);
3747 space = false;
3748 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3749 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3750
1e7a0e21
LP		 3751 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3752 NDiscDNSSL *dd;
b2a81c0b 3753
1e7a0e21
LP		 3754 if (dhcp_domainname)
3755 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3756 if (dhcp_domains)
3757 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3758 if (dhcp6_domains)
3759 fputstrv(f, dhcp6_domains, NULL, &space);
3760
3761 SET_FOREACH(dd, link->ndisc_dnssl, i)
3762 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3763 }
b2a81c0b 3764
0d536673 3765 fputc('\n', f);
67272d15 3766
3c9b8860 3767 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3768 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3769 fprintf(f, "MDNS=%s\n",
3770 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3771 if (link->network->dns_default_route >= 0)
3772 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3773
c9299be2
IT		 3774 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3775 fprintf(f, "DNS_OVER_TLS=%s\n",
3776 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3777
ad6c0475
LP		 3778 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3779 fprintf(f, "DNSSEC=%s\n",
3780 dnssec_mode_to_string(link->network->dnssec_mode));
3781
8a516214
LP		 3782 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3783 const char *n;
3784
0d536673 3785 fputs("DNSSEC_NTA=", f);
8a516214 3786 space = false;
d390f8ef
LP		 3787 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3788 fputs_with_space(f, n, NULL, &space);
0d536673 3789 fputc('\n', f);
8a516214
LP		 3790 }
3791
0d536673 3792 fputs("ADDRESSES=", f);
e7780c8d
TG		 3793 space = false;
3794 SET_FOREACH(a, link->addresses, i) {
3795 _cleanup_free_ char *address_str = NULL;
3796
3797 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3798 if (r < 0)
3799 goto fail;
3800
e7780c8d
TG		 3801 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3802 space = true;
3803 }
0d536673 3804 fputc('\n', f);
c1eb9872 3805
0d536673 3806 fputs("ROUTES=", f);
c1eb9872
TG		 3807 space = false;
3808 SET_FOREACH(route, link->routes, i) {
3809 _cleanup_free_ char *route_str = NULL;
3810
3811 r = in_addr_to_string(route->family, &route->dst, &route_str);
3812 if (r < 0)
3813 goto fail;
3814
ecc3f340
ZJS		 3815 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3816 space ? " " : "", route_str,
f833694d 3817 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3818 space = true;
3819 }
3820
0d536673 3821 fputc('\n', f);
bcb7a07e 3822 }
7374f9d8 3823
b295beea
LP		 3824 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3825 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3826
8eb9058d 3827 if (link->dhcp_lease) {
0bc70f1d 3828 struct in_addr address;
8eb9058d
LP		 3829 const char *tz = NULL;
3830
0bc70f1d
TG		 3831 assert(link->network);
3832
8eb9058d
LP		 3833 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3834 if (r >= 0)
3835 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3836
0bc70f1d
TG		 3837 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3838 if (r >= 0) {
0d536673 3839 fputs("DHCP4_ADDRESS=", f);
072320ea 3840 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3841 fputc('\n', f);
0bc70f1d 3842 }
d9876a52 3843
bd91b83e 3844 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3845 if (r < 0)
c2d6bd61 3846 goto fail;
fe8db0c5 3847
7374f9d8 3848 fprintf(f,
b0e39c82
TG		 3849 "DHCP_LEASE=%s\n",
3850 link->lease_file);
deb2e523 3851 } else
6990fb6b 3852 (void) unlink(link->lease_file);
fe8db0c5 3853
0bc70f1d
TG		 3854 if (link->ipv4ll) {
3855 struct in_addr address;
3856
3857 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3858 if (r >= 0) {
0d536673 3859 fputs("IPV4LL_ADDRESS=", f);
072320ea 3860 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3861 fputc('\n', f);
0bc70f1d
TG		 3862 }
3863 }
3864
c2d6bd61
LP		 3865 r = fflush_and_check(f);
3866 if (r < 0)
3867 goto fail;
fe8db0c5 3868
c2d6bd61 3869 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3870 r = -errno;
c2d6bd61 3871 goto fail;
fe8db0c5
TG		 3872 }
3873
c2d6bd61 3874 return 0;
dacd6cee 3875
c2d6bd61 3876fail:
6a7a4e4d 3877 (void) unlink(link->state_file);
6a7a4e4d
LP		 3878 if (temp_path)
3879 (void) unlink(temp_path);
3880
dacd6cee 3881 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3882}
3883
84de38c5
TG		 3884/* The serialized state in /run is no longer up-to-date. */
3885void link_dirty(Link *link) {
3886 int r;
3887
3888 assert(link);
3889
0c241a37
SS		 3890 /* mark manager dirty as link is dirty */
3891 manager_dirty(link->manager);
3892
84de38c5
TG		 3893 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3894 if (r < 0)
3895 /* allocation errors are ignored */
3896 return;
3897
3898 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3899 if (r <= 0)
3900 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3901 return;
3902
3903 link_ref(link);
3904}
3905
3906/* The serialized state in /run is up-to-date */
3907void link_clean(Link *link) {
3908 assert(link);
3909 assert(link->manager);
3910
1046bf9b 3911 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3912}
3913
fe8db0c5 3914static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3915 [LINK_STATE_PENDING] = "pending",
bd08ce56 3916 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3917 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3918 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3919 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3920 [LINK_STATE_FAILED] = "failed",
370e9930 3921 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3922};
3923
3924DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
Unnamed repository; edit this file 'description' to name the repository.