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network: add a debugging log
[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>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
3ddcbeea 23#include "networkd-can.h"
8fcf1d61 24#include "networkd-dhcp-server.h"
ca5ad760
YW		 25#include "networkd-dhcp4.h"
26#include "networkd-dhcp6.h"
27#include "networkd-ipv4ll.h"
a0e5c15d 28#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 29#include "networkd-link-bus.h"
30#include "networkd-link.h"
8e1ad1ea 31#include "networkd-lldp-tx.h"
23f53b99 32#include "networkd-manager.h"
1e7a0e21 33#include "networkd-ndisc.h"
e4a71bf3 34#include "networkd-neighbor.h"
518cd6b5 35#include "networkd-sriov.h"
7465dd22 36#include "networkd-radv.h"
bce67bbe 37#include "networkd-routing-policy-rule.h"
8d968fdd 38#include "networkd-wifi.h"
cf1d700d
TG		 39#include "set.h"
40#include "socket-util.h"
bf331d87 41#include "stat-util.h"
15a5e950 42#include "stdio-util.h"
8b43440b 43#include "string-table.h"
51517f9e 44#include "strv.h"
62e021a9 45#include "sysctl-util.h"
34658df2 46#include "tc.h"
e4de7287 47#include "tmpfile-util.h"
299ad32d 48#include "udev-util.h"
cf1d700d 49#include "util.h"
737f1405 50#include "vrf.h"
fc2f9534 51
bdb9f580
YW		 52uint32_t link_get_vrf_table(Link *link) {
53 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
54}
55
56uint32_t link_get_dhcp_route_table(Link *link) {
57 /* When the interface is part of an VRF use the VRFs routing table, unless
58 * another table is explicitly specified. */
59 if (link->network->dhcp_route_table_set)
60 return link->network->dhcp_route_table;
61 return link_get_vrf_table(link);
62}
63
64uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
65 if (link->network->ipv6_accept_ra_route_table_set)
66 return link->network->ipv6_accept_ra_route_table;
67 return link_get_vrf_table(link);
68}
69
f24648a6
YW		 70DUID* link_get_duid(Link *link) {
71 if (link->network->duid.type != _DUID_TYPE_INVALID)
72 return &link->network->duid;
73 else
74 return &link->manager->duid;
75}
76
b9d74c40
LP		 77static bool link_dhcp6_enabled(Link *link) {
78 assert(link);
79
fa709992
LP		 80 if (!socket_ipv6_is_supported())
81 return false;
82
78c958f8
TG		 83 if (link->flags & IFF_LOOPBACK)
84 return false;
85
86 if (!link->network)
87 return false;
88
f2bfcdb9
YW		 89 if (link->network->bond)
90 return false;
91
500b96eb 92 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 93 return false;
94
e0ee46f2 95 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 96}
97
b9d74c40
LP		 98static bool link_dhcp4_enabled(Link *link) {
99 assert(link);
100
78c958f8
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
500b96eb 110 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 111 return false;
112
e0ee46f2 113 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 114}
115
b9d74c40
LP		 116static bool link_dhcp4_server_enabled(Link *link) {
117 assert(link);
118
78c958f8
TG		 119 if (link->flags & IFF_LOOPBACK)
120 return false;
121
122 if (!link->network)
123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
500b96eb 128 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 129 return false;
130
78c958f8
TG		 131 return link->network->dhcp_server;
132}
133
2d792895 134bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 135 assert(link);
910feb78 136 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 137
78c958f8
TG		 138 if (link->flags & IFF_LOOPBACK)
139 return false;
140
141 if (!link->network)
142 return false;
143
500b96eb 144 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 145 return false;
146
98d20a17 147 if (STRPTR_IN_SET(link->kind,
148 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 149 "vti6", "nlmon", "xfrm"))
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
910feb78 159 return link->network->link_local & mask;
8bc17bb3
SS		 160}
161
b9d74c40
LP		 162static bool link_ipv6ll_enabled(Link *link) {
163 assert(link);
164
fa709992
LP		 165 if (!socket_ipv6_is_supported())
166 return false;
167
d0d6a4cd
TG		 168 if (link->flags & IFF_LOOPBACK)
169 return false;
170
171 if (!link->network)
172 return false;
173
500b96eb 174 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 175 return false;
176
177 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 178 return false;
179
f2bfcdb9
YW		 180 if (link->network->bond)
181 return false;
182
e0ee46f2 183 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 184}
185
439689c6
SS		 186static bool link_ipv6_enabled(Link *link) {
187 assert(link);
188
189 if (!socket_ipv6_is_supported())
190 return false;
191
b102cdca 192 if (link->network->bond)
2b00a4e0
TY		 193 return false;
194
500b96eb 195 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 196 return false;
197
4cef7fe3 198 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 199 if (link_ipv6ll_enabled(link))
200 return true;
201
202 if (network_has_static_ipv6_configurations(link->network))
203 return true;
204
205 return false;
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
2d792895 226 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 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
2d792895 244 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 245 return false;
246
e0ee46f2 247 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 248}
249
23d8b221
SS		 250static bool link_proxy_arp_enabled(Link *link) {
251 assert(link);
252
253 if (link->flags & IFF_LOOPBACK)
254 return false;
255
256 if (!link->network)
257 return false;
258
259 if (link->network->proxy_arp < 0)
260 return false;
261
262 return true;
263}
264
b9d74c40
LP		 265static bool link_ipv6_accept_ra_enabled(Link *link) {
266 assert(link);
267
fa709992
LP		 268 if (!socket_ipv6_is_supported())
269 return false;
270
f5a8c43f
TG		 271 if (link->flags & IFF_LOOPBACK)
272 return false;
273
274 if (!link->network)
275 return false;
276
702c979f
SS		 277 if (!link_ipv6ll_enabled(link))
278 return false;
279
f5a8c43f
TG		 280 /* If unset use system default (enabled if local forwarding is disabled.
281 * disabled if local forwarding is enabled).
282 * If set, ignore or enforce RA independent of local forwarding state.
283 */
284 if (link->network->ipv6_accept_ra < 0)
285 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
286 return !link_ipv6_forward_enabled(link);
287 else if (link->network->ipv6_accept_ra > 0)
288 /* accept RA even if ip_forward is enabled */
289 return true;
290 else
291 /* ignore RA */
292 return false;
293}
294
1f0d9695 295static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 296 assert(link);
d68e2e59
LP		 297
298 if (!socket_ipv6_is_supported())
299 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
300
49092e22 301 if (link->flags & IFF_LOOPBACK)
1f0d9695 302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 303
304 if (!link->network)
1f0d9695 305 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 306
307 return link->network->ipv6_privacy_extensions;
308}
309
57ad7607 310static int link_update_ipv6_sysctl(Link *link) {
482efedc 311 bool enabled;
439689c6
SS		 312 int r;
313
314 if (link->flags & IFF_LOOPBACK)
315 return 0;
316
482efedc
SS		 317 enabled = link_ipv6_enabled(link);
318 if (enabled) {
319 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
320 if (r < 0)
57ad7607
ZJS		 321 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
322
323 log_link_info(link, "IPv6 successfully enabled");
482efedc 324 }
439689c6
SS		 325
326 return 0;
327}
328
34bf3c00
YW		 329static bool link_is_enslaved(Link *link) {
330 if (link->flags & IFF_SLAVE)
331 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
332 return true;
333
34bf3c00
YW		 334 if (!link->network)
335 return false;
336
bb262ef0 337 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 338 return true;
339
bb262ef0
YW		 340 /* TODO: add conditions for other netdevs. */
341
34bf3c00
YW		 342 return false;
343}
344
45e11abf
YW		 345static void link_update_master_operstate(Link *link, NetDev *netdev) {
346 Link *master;
347
348 if (!netdev)
349 return;
350
7936917e
YW		 351 if (netdev->ifindex <= 0)
352 return;
353
45e11abf
YW		 354 if (link_get(link->manager, netdev->ifindex, &master) < 0)
355 return;
356
357 link_update_operstate(master, true);
358}
359
360void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 361 LinkOperationalState operstate;
1678fbb3
YW		 362 LinkCarrierState carrier_state;
363 LinkAddressState address_state;
35c5a9ca 364 _cleanup_strv_free_ char **p = NULL;
1678fbb3 365 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 366 bool changed = false;
1678fbb3 367 Address *address;
45e11abf 368 Iterator i;
14153d1b 369
84de38c5
TG		 370 assert(link);
371
372 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 373 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 374 else if (link_has_carrier(link)) {
1678fbb3
YW		 375 if (link_is_enslaved(link))
376 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 377 else
1678fbb3 378 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 379 } else if (link->flags & IFF_UP)
1678fbb3 380 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 381 else
1678fbb3 382 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 383
1678fbb3 384 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 385 Link *slave;
386
5f707e12 387 SET_FOREACH(slave, link->slaves, i) {
959f65d3 388 link_update_operstate(slave, false);
84de38c5 389
1678fbb3
YW		 390 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
391 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 392 }
959f65d3 393 }
84de38c5 394
1678fbb3
YW		 395 SET_FOREACH(address, link->addresses, i) {
396 if (!address_is_ready(address))
397 continue;
84de38c5 398
1678fbb3
YW		 399 if (address->scope < scope)
400 scope = address->scope;
401 }
84de38c5 402
1678fbb3
YW		 403 /* for operstate we also take foreign addresses into account */
404 SET_FOREACH(address, link->addresses_foreign, i) {
405 if (!address_is_ready(address))
406 continue;
407
408 if (address->scope < scope)
409 scope = address->scope;
410 }
411
412 if (scope < RT_SCOPE_SITE)
413 /* universally accessible addresses found */
414 address_state = LINK_ADDRESS_STATE_ROUTABLE;
415 else if (scope < RT_SCOPE_HOST)
416 /* only link or site local addresses found */
417 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 418 else
1678fbb3
YW		 419 /* no useful addresses found */
420 address_state = LINK_ADDRESS_STATE_OFF;
421
422 /* Mapping of address and carrier state vs operational state
423 * carrier state
424 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
425 * ------------------------------------------------------------------------------
426 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
427 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
428 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
429 */
84de38c5 430
1678fbb3
YW		 431 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
432 operstate = (LinkOperationalState) carrier_state;
433 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
434 operstate = LINK_OPERSTATE_ROUTABLE;
435 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
436 operstate = LINK_OPERSTATE_DEGRADED;
437 else
14153d1b
YW		 438 operstate = LINK_OPERSTATE_ENSLAVED;
439
35c5a9ca
YW		 440 if (link->carrier_state != carrier_state) {
441 link->carrier_state = carrier_state;
442 changed = true;
443 if (strv_extend(&p, "CarrierState") < 0)
444 log_oom();
445 }
959f65d3 446
35c5a9ca
YW		 447 if (link->address_state != address_state) {
448 link->address_state = address_state;
449 changed = true;
450 if (strv_extend(&p, "AddressState") < 0)
451 log_oom();
959f65d3
YW		 452 }
453
84de38c5
TG		 454 if (link->operstate != operstate) {
455 link->operstate = operstate;
35c5a9ca
YW		 456 changed = true;
457 if (strv_extend(&p, "OperationalState") < 0)
458 log_oom();
84de38c5 459 }
959f65d3 460
35c5a9ca
YW		 461 if (p)
462 link_send_changed_strv(link, p);
463 if (changed)
464 link_dirty(link);
465
45e11abf
YW		 466 if (also_update_master && link->network) {
467 link_update_master_operstate(link, link->network->bond);
468 link_update_master_operstate(link, link->network->bridge);
959f65d3 469 }
84de38c5
TG		 470}
471
51d18171
TG		 472#define FLAG_STRING(string, flag, old, new) \
473 (((old ^ new) & flag) \
474 ? ((old & flag) ? (" -" string) : (" +" string)) \
475 : "")
476
bb262ef0 477static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 478 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
479 uint8_t operstate;
480 int r;
481
482 assert(link);
483
484 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 485 if (r < 0)
486 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 487
1c4baffc 488 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 489 if (r < 0)
490 /* if we got a message without operstate, take it to mean
491 the state was unchanged */
492 operstate = link->kernel_operstate;
493
bb262ef0 494 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 495 return 0;
496
497 if (link->flags != flags) {
6a7a4e4d 498 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		 499 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
500 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
501 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
502 FLAG_STRING("UP", IFF_UP, link->flags, flags),
503 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
504 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
505 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
506 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
507 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
508 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
509 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
510 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
511 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
512 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
513 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
514 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
515 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
516 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
517 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
518
519 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
520 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
521 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
522 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
523 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
524 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
525 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
526 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
527
528 /* link flags are currently at most 18 bits, let's align to
529 * printing 20 */
530 if (unknown_flags_added)
79008bdd 531 log_link_debug(link,
6a7a4e4d 532 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 533 unknown_flags_added);
534
535 if (unknown_flags_removed)
79008bdd 536 log_link_debug(link,
6a7a4e4d 537 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 538 unknown_flags_removed);
539 }
540
541 link->flags = flags;
542 link->kernel_operstate = operstate;
543
959f65d3 544 link_update_operstate(link, true);
51d18171
TG		 545
546 return 0;
547}
548
1c4baffc 549static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 550 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 551 const char *ifname, *kind = NULL;
b710e6b6 552 unsigned short iftype;
572b21d9
YW		 553 int r, ifindex;
554 uint16_t type;
f579559b 555
0c2f9b84 556 assert(manager);
505f8da7 557 assert(message);
f579559b
TG		 558 assert(ret);
559
6cad256d
TJ		 560 /* check for link kind */
561 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
562 if (r == 0) {
db2f8a2e 563 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 564 r = sd_netlink_message_exit_container(message);
565 if (r < 0)
566 return r;
567 }
568
1c4baffc 569 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 570 if (r < 0)
571 return r;
572 else if (type != RTM_NEWLINK)
573 return -EINVAL;
574
575 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
576 if (r < 0)
577 return r;
578 else if (ifindex <= 0)
579 return -EINVAL;
580
b710e6b6
LP		 581 r = sd_rtnl_message_link_get_type(message, &iftype);
582 if (r < 0)
583 return r;
584
1c4baffc 585 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 586 if (r < 0)
587 return r;
588
17f9c355 589 link = new(Link, 1);
f579559b
TG		 590 if (!link)
591 return -ENOMEM;
592
17f9c355
YW		 593 *link = (Link) {
594 .n_ref = 1,
595 .manager = manager,
596 .state = LINK_STATE_PENDING,
17f9c355
YW		 597 .ifindex = ifindex,
598 .iftype = iftype,
15761549
YW		 599
600 .n_dns = (unsigned) -1,
601 .dns_default_route = -1,
602 .llmnr = _RESOLVE_SUPPORT_INVALID,
603 .mdns = _RESOLVE_SUPPORT_INVALID,
604 .dnssec_mode = _DNSSEC_MODE_INVALID,
605 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 606 };
607
505f8da7
TG		 608 link->ifname = strdup(ifname);
609 if (!link->ifname)
610 return -ENOMEM;
f579559b 611
6cad256d
TJ		 612 if (kind) {
613 link->kind = strdup(kind);
614 if (!link->kind)
615 return -ENOMEM;
616 }
617
cbff7170
TJ		 618 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
619 if (r < 0)
620 log_link_debug_errno(link, r, "New device has no master, continuing without");
621
1c4baffc 622 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 623 if (r < 0)
34437b4f 624 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 625
c643bda5 626 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 627 if (r < 0)
628 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
629
c643bda5
YW		 630 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
631 if (r < 0)
632 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
633
572b21d9
YW		 634 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
635 if (r < 0 && r != -ENODATA)
636 return r;
637
34437b4f 638 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 639 return -ENOMEM;
fe8db0c5 640
34437b4f 641 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 642 return -ENOMEM;
643
34437b4f 644 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 645 return -ENOMEM;
646
d5099efc 647 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 648 if (r < 0)
649 return r;
650
651 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 652 if (r < 0)
653 return r;
654
bb262ef0 655 r = link_update_flags(link, message, false);
51d18171
TG		 656 if (r < 0)
657 return r;
658
1cc6c93a 659 *ret = TAKE_PTR(link);
f579559b
TG		 660
661 return 0;
662}
663
15761549
YW		 664void link_ntp_settings_clear(Link *link) {
665 link->ntp = strv_free(link->ntp);
666}
667
668void link_dns_settings_clear(Link *link) {
669 link->dns = mfree(link->dns);
670 link->n_dns = (unsigned) -1;
671
672 link->search_domains = ordered_set_free_free(link->search_domains);
673 link->route_domains = ordered_set_free_free(link->route_domains);
674
675 link->dns_default_route = -1;
676 link->llmnr = _RESOLVE_SUPPORT_INVALID;
677 link->mdns = _RESOLVE_SUPPORT_INVALID;
678 link->dnssec_mode = _DNSSEC_MODE_INVALID;
679 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
680
681 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
682}
683
1a6bb31f
YW		 684static void link_free_engines(Link *link) {
685 if (!link)
686 return;
687
688 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
689 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
690 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
691 link->dhcp_routes = set_free(link->dhcp_routes);
692
693 link->lldp = sd_lldp_unref(link->lldp);
694
695 ndisc_flush(link);
696
697 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
698 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
699 link->ndisc = sd_ndisc_unref(link->ndisc);
700 link->radv = sd_radv_unref(link->radv);
701}
702
8301aa0b 703static Link *link_free(Link *link) {
428fd0a7
TG		 704 Address *address;
705
8301aa0b 706 assert(link);
f579559b 707
15761549
YW		 708 link_ntp_settings_clear(link);
709 link_dns_settings_clear(link);
710
f535e354
YW		 711 link->routes = set_free_with_destructor(link->routes, route_free);
712 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 713
c16c7808
SS		 714 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
715 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
716
d1bdafd2
WKI		 717 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
718 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
719
f535e354
YW		 720 link->addresses = set_free_with_destructor(link->addresses, address_free);
721 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 722
11bf3cce
LP		 723 while ((address = link->pool_addresses)) {
724 LIST_REMOVE(addresses, link->pool_addresses, address);
725 address_free(address);
726 }
727
7272b25e 728 link_lldp_emit_stop(link);
1a6bb31f 729 link_free_engines(link);
68a8723c 730 free(link->lease_file);
49699bac
SS		 731 free(link->lldp_file);
732
c166a070 733 free(link->ifname);
572b21d9 734 strv_free(link->alternative_names);
ceac4078 735 free(link->kind);
8d968fdd 736 free(link->ssid);
c643bda5 737 free(link->driver);
6cad256d 738
db2f8a2e 739 (void) unlink(link->state_file);
fe8db0c5 740 free(link->state_file);
c166a070 741
51517f9e 742 sd_device_unref(link->sd_device);
b5db00e5 743
0d4ad91d 744 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 745 hashmap_free(link->bound_by_links);
746
5f707e12 747 set_free_with_destructor(link->slaves, link_unref);
033295c1 748
c9c908a6
YW		 749 network_unref(link->network);
750
8301aa0b 751 return mfree(link);
14b746f7
TG		 752}
753
8301aa0b 754DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 755
11a7f229
TG		 756int link_get(Manager *m, int ifindex, Link **ret) {
757 Link *link;
11a7f229
TG		 758
759 assert(m);
e856ed00 760 assert(ifindex > 0);
11a7f229
TG		 761 assert(ret);
762
ae06ab10 763 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 764 if (!link)
765 return -ENODEV;
766
767 *ret = link;
768
769 return 0;
770}
771
af9ba57a 772void link_set_state(Link *link, LinkState state) {
e331e246
TG		 773 assert(link);
774
775 if (link->state == state)
776 return;
777
0beb9542
YW		 778 log_link_debug(link, "State changed: %s -> %s",
779 link_state_to_string(link->state),
780 link_state_to_string(state));
781
e331e246
TG		 782 link->state = state;
783
784 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 785}
786
57bd6899
TG		 787static void link_enter_unmanaged(Link *link) {
788 assert(link);
789
e331e246 790 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 791
84de38c5 792 link_dirty(link);
57bd6899
TG		 793}
794
95355a28 795int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 796 int r = 0, k;
051e77ca 797 Address *ad;
111bb8f9
TG		 798
799 assert(link);
800 assert(link->manager);
801 assert(link->manager->event);
802
d03073dd
YW		 803 dhcp4_release_old_lease(link);
804
80060352
ZJS		 805 bool keep_dhcp = may_keep_dhcp &&
806 link->network &&
807 (link->manager->restarting ||
808 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
809
810 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 811 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 812 if (k < 0)
36c7d709 813 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 814 }
815
ba179154 816 if (link->ipv4ll) {
111bb8f9 817 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 818 if (k < 0)
36c7d709 819 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 820 }
821
051e77ca
SS		 822 if (link->network)
823 LIST_FOREACH(addresses, ad, link->network->static_addresses)
824 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
825 k = sd_ipv4acd_stop(ad->acd);
826 if (k < 0)
827 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
828 }
829
f5a8c43f
TG		 830 if (link->dhcp6_client) {
831 k = sd_dhcp6_client_stop(link->dhcp6_client);
832 if (k < 0)
36c7d709 833 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 834 }
4138fb2c 835
1e7a0e21
LP		 836 if (link->ndisc) {
837 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 838 if (k < 0)
36c7d709 839 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 840 }
841
7465dd22 842 if (link->radv) {
290696e5 843 k = sd_radv_stop(link->radv);
7465dd22
PF		 844 if (k < 0)
845 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
846 }
847
7272b25e 848 link_lldp_emit_stop(link);
111bb8f9
TG		 849 return r;
850}
851
b22d8a00 852void link_enter_failed(Link *link) {
ef1ba606 853 assert(link);
f882c247 854
370e9930 855 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 856 return;
857
6a7a4e4d 858 log_link_warning(link, "Failed");
449f7554 859
e331e246 860 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 861
95355a28 862 link_stop_clients(link, false);
111bb8f9 863
84de38c5 864 link_dirty(link);
f882c247
TG		 865}
866
7033af49
YW		 867static int link_join_netdevs_after_configured(Link *link) {
868 NetDev *netdev;
869 Iterator i;
870 int r;
871
872 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
873 if (netdev->ifindex > 0)
874 /* Assume already enslaved. */
875 continue;
876
877 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
878 continue;
879
880 log_struct(LOG_DEBUG,
881 LOG_LINK_INTERFACE(link),
882 LOG_NETDEV_INTERFACE(netdev),
883 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
884
885 r = netdev_join(netdev, link, NULL);
886 if (r < 0)
887 return log_struct_errno(LOG_WARNING, r,
888 LOG_LINK_INTERFACE(link),
889 LOG_NETDEV_INTERFACE(netdev),
890 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
891 }
892
893 return 0;
894}
895
e3a7b048 896static void link_enter_configured(Link *link) {
dd43110f
TG		 897 assert(link);
898 assert(link->network);
e3a7b048 899
289e6774 900 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 901 return;
dd43110f 902
e331e246 903 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 904
7033af49
YW		 905 (void) link_join_netdevs_after_configured(link);
906
84de38c5 907 link_dirty(link);
dd43110f
TG		 908}
909
47079967 910static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 911 RoutingPolicyRule *rule, *rrule = NULL;
912 int r;
913
914 assert(link);
915 assert(link->network);
916
2428613f
YW		 917 link->routing_policy_rules_configured = false;
918
8a9b3a23 919 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 920 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 921 if (r >= 0) {
922 if (r == 0)
923 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 924 continue;
925 }
926
9f08a578 927 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 928 if (r < 0)
929 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 930 if (r > 0)
931 link->routing_policy_rule_messages++;
8a9b3a23
SS		 932 }
933
934 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 935 if (link->routing_policy_rule_messages == 0) {
936 link->routing_policy_rules_configured = true;
937 link_check_ready(link);
b425c3ae 938 } else {
7715629e 939 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 940 link_set_state(link, LINK_STATE_CONFIGURING);
941 }
8a9b3a23
SS		 942
943 return 0;
944}
945
c16c7808
SS		 946static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
947 int r;
948
949 assert(link);
950 assert(link->nexthop_messages > 0);
951 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
952 LINK_STATE_FAILED, LINK_STATE_LINGER));
953
954 link->nexthop_messages--;
955
956 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
957 return 1;
958
959 r = sd_netlink_message_get_errno(m);
960 if (r < 0 && r != -EEXIST) {
5ecb131d 961 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 962 link_enter_failed(link);
963 return 1;
964 }
965
966 if (link->nexthop_messages == 0) {
967 log_link_debug(link, "Nexthop set");
968 link->static_nexthops_configured = true;
969 link_check_ready(link);
970 }
971
972 return 1;
973}
974
975int link_request_set_nexthop(Link *link) {
976 NextHop *nh;
977 int r;
978
979 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
980 r = nexthop_configure(nh, link, nexthop_handler);
981 if (r < 0)
982 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
983 if (r > 0)
984 link->nexthop_messages++;
985 }
986
987 if (link->nexthop_messages == 0) {
988 link->static_nexthops_configured = true;
989 link_check_ready(link);
990 } else {
991 log_link_debug(link, "Setting nexthop");
992 link_set_state(link, LINK_STATE_CONFIGURING);
993 }
994
995 return 1;
996}
997
302a796f 998static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 999 int r;
1000
1046bf9b 1001 assert(link);
7715629e 1002 assert(link->route_messages > 0);
289e6774
WKI		 1003 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1004 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1005
7715629e 1006 link->route_messages--;
f882c247 1007
77a008c0 1008 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1009 return 1;
1010
1c4baffc 1011 r = sd_netlink_message_get_errno(m);
4ff296b0 1012 if (r < 0 && r != -EEXIST) {
5ecb131d 1013 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1014 link_enter_failed(link);
1015 return 1;
1016 }
f882c247 1017
7715629e 1018 if (link->route_messages == 0) {
6a7a4e4d 1019 log_link_debug(link, "Routes set");
7715629e 1020 link->static_routes_configured = true;
8012cd39 1021 link_check_ready(link);
dd3efc09 1022 }
f882c247
TG		 1023
1024 return 1;
1025}
1026
b5799eeb 1027int link_request_set_routes(Link *link) {
bf61b05a
LP		 1028 enum {
1029 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1030 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1031 _PHASE_MAX
1032 } phase;
a6cc569e 1033 Route *rt;
f882c247
TG		 1034 int r;
1035
1036 assert(link);
1037 assert(link->network);
c42ff3a1
WKI		 1038 assert(link->addresses_configured);
1039 assert(link->address_messages == 0);
289e6774 1040 assert(link->state != _LINK_STATE_INVALID);
f882c247 1041
2428613f 1042 link->static_routes_configured = false;
c16c7808 1043 link->static_routes_ready = false;
27c34f73 1044
4e2ef9d9
YW		 1045 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1046 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1047 * the addresses now, let's not configure the routes either. */
1048 return 0;
1049
47079967 1050 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1051 if (r < 0)
1052 return r;
f882c247 1053
bf61b05a
LP		 1054 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1055 for (phase = 0; phase < _PHASE_MAX; phase++)
1056 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1057 if (rt->gateway_from_dhcp)
1058 continue;
0d34228f 1059
6ff5cc6b 1060 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1061 continue;
a6cc569e 1062
0d34228f 1063 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1064 if (r < 0)
1065 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1066 if (r > 0)
1067 link->route_messages++;
0d34228f 1068 }
f5be5601 1069
7715629e
ST		 1070 if (link->route_messages == 0) {
1071 link->static_routes_configured = true;
8012cd39 1072 link_check_ready(link);
b425c3ae 1073 } else {
6a7a4e4d 1074 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1075 link_set_state(link, LINK_STATE_CONFIGURING);
1076 }
f882c247
TG		 1077
1078 return 0;
1079}
1080
6accfd31
DA		 1081void link_check_ready(Link *link) {
1082 Address *a;
1083 Iterator i;
4ff296b0 1084 int r;
6accfd31
DA		 1085
1086 assert(link);
1087
1088 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1089 return;
1090
1091 if (!link->network)
1092 return;
1093
1094 if (!link->addresses_configured)
1095 return;
1096
1097 if (!link->neighbors_configured)
1098 return;
1099
6aa5773b
DA		 1100 SET_FOREACH(a, link->addresses, i)
1101 if (!address_is_ready(a))
1102 return;
1103
1104 if (!link->addresses_ready) {
1105 link->addresses_ready = true;
4ff296b0
YW		 1106 r = link_request_set_routes(link);
1107 if (r < 0)
1108 link_enter_failed(link);
710ce9e5 1109 return;
6aa5773b
DA		 1110 }
1111
6accfd31
DA		 1112 if (!link->static_routes_configured)
1113 return;
1114
c16c7808
SS		 1115 if (!link->static_routes_ready) {
1116 link->static_routes_ready = true;
1117 r = link_request_set_nexthop(link);
1118 if (r < 0)
1119 link_enter_failed(link);
1120 return;
1121 }
1122
1123 if (!link->static_nexthops_configured)
1124 return;
1125
6accfd31
DA		 1126 if (!link->routing_policy_rules_configured)
1127 return;
1128
34658df2 1129 if (!link->tc_configured)
4ecdcb07
YW		 1130 return;
1131
518cd6b5
SS		 1132 if (!link->sr_iov_configured)
1133 return;
1134
463797c1 1135 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1136
2aa7d367 1137 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address)
463797c1 1138 return;
6accfd31 1139
463797c1
YW		 1140 if (link_ipv6ll_enabled(link) &&
1141 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1142 return;
6accfd31 1143
2a877f45 1144 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || dhcp6_get_prefix_delegation(link) || link_ipv6_accept_ra_enabled(link)) &&
463797c1 1145 !link->dhcp4_configured &&
2a877f45
YW		 1146 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1147 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
3cd5924c 1148 !link->ndisc_configured &&
2aa7d367 1149 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address))
3cd5924c 1150 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
463797c1
YW		 1151 * an IPv4ll fallback address must be configured. */
1152 return;
463797c1 1153 }
6accfd31 1154
6accfd31
DA		 1155 if (link->state != LINK_STATE_CONFIGURED)
1156 link_enter_configured(link);
1157
1158 return;
1159}
1160
e4a71bf3
WKI		 1161static int link_request_set_neighbors(Link *link) {
1162 Neighbor *neighbor;
1163 int r;
1164
1165 assert(link);
1166 assert(link->network);
1167 assert(link->state != _LINK_STATE_INVALID);
1168
2428613f 1169 link->neighbors_configured = false;
e4a71bf3
WKI		 1170
1171 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1172 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1173 if (r < 0)
1174 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1175 }
1176
1177 if (link->neighbor_messages == 0) {
1178 link->neighbors_configured = true;
1179 link_check_ready(link);
b425c3ae 1180 } else {
e4a71bf3 1181 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1182 link_set_state(link, LINK_STATE_CONFIGURING);
1183 }
e4a71bf3
WKI		 1184
1185 return 0;
1186}
1187
3650173f 1188static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1189 int r;
1190
4958aee4 1191 assert(rtnl);
f5be5601
TG		 1192 assert(m);
1193 assert(link);
1194 assert(link->ifname);
7715629e 1195 assert(link->address_messages > 0);
289e6774 1196 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1197 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1198
7715629e 1199 link->address_messages--;
f882c247 1200
5da8149f 1201 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1202 return 1;
1203
1c4baffc 1204 r = sd_netlink_message_get_errno(m);
4ff296b0 1205 if (r < 0 && r != -EEXIST) {
5ecb131d 1206 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1207 link_enter_failed(link);
1208 return 1;
1209 } else if (r >= 0)
1210 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1211
7715629e 1212 if (link->address_messages == 0) {
6a7a4e4d 1213 log_link_debug(link, "Addresses set");
c42ff3a1 1214 link->addresses_configured = true;
6aa5773b 1215 link_check_ready(link);
dd3efc09 1216 }
f882c247
TG		 1217
1218 return 1;
1219}
1220
f6bb7ac5
TJ		 1221static int link_set_bridge_fdb(Link *link) {
1222 FdbEntry *fdb_entry;
197e2809 1223 int r;
f6bb7ac5
TJ		 1224
1225 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1226 r = fdb_entry_configure(link, fdb_entry);
197e2809 1227 if (r < 0)
f6bb7ac5 1228 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1229 }
1230
197e2809 1231 return 0;
f6bb7ac5
TJ		 1232}
1233
289e6774 1234static int link_request_set_addresses(Link *link) {
95b74ef6 1235 AddressLabel *label;
a6cc569e 1236 Address *ad;
bd6379ec 1237 Prefix *p;
f882c247
TG		 1238 int r;
1239
1240 assert(link);
1241 assert(link->network);
f5be5601 1242 assert(link->state != _LINK_STATE_INVALID);
f882c247 1243
2428613f
YW		 1244 /* Reset all *_configured flags we are configuring. */
1245 link->addresses_configured = false;
6aa5773b 1246 link->addresses_ready = false;
2428613f
YW		 1247 link->neighbors_configured = false;
1248 link->static_routes_configured = false;
c16c7808
SS		 1249 link->static_routes_ready = false;
1250 link->static_nexthops_configured = false;
2428613f
YW		 1251 link->routing_policy_rules_configured = false;
1252
f6bb7ac5
TJ		 1253 r = link_set_bridge_fdb(link);
1254 if (r < 0)
1255 return r;
1256
f3ef324d
YW		 1257 r = link_request_set_neighbors(link);
1258 if (r < 0)
1259 return r;
e4a71bf3 1260
3d3d4255 1261 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1262 bool update;
1263
1264 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1265
1266 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1267 if (r < 0)
1268 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1269 if (r > 0)
1270 link->address_messages++;
95b74ef6
SS		 1271 }
1272
bd6379ec
SS		 1273 if (IN_SET(link->network->router_prefix_delegation,
1274 RADV_PREFIX_DELEGATION_STATIC,
1275 RADV_PREFIX_DELEGATION_BOTH))
1276 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1277 _cleanup_(address_freep) Address *address = NULL;
1278
1279 if (!p->assign)
1280 continue;
1281
1282 r = address_new(&address);
1283 if (r < 0)
1284 return log_link_error_errno(link, r, "Could not allocate address: %m");
1285
1286 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1287 if (r < 0)
1288 return r;
1289
1290 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1291 if (r < 0)
1292 return r;
1293
1294 address->family = AF_INET6;
1295 r = address_configure(address, link, address_handler, true);
1296 if (r < 0)
1297 return log_link_warning_errno(link, r, "Could not set addresses: %m");
1298 if (r > 0)
1299 link->address_messages++;
1300 }
1301
95b74ef6 1302 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1303 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1304 if (r < 0)
1305 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1306
7715629e 1307 link->address_label_messages++;
f882c247
TG		 1308 }
1309
d4cdbea5
TG		 1310 /* now that we can figure out a default address for the dhcp server,
1311 start it */
708c425d 1312 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1313 r = dhcp4_server_configure(link);
4ff296b0 1314 if (r < 0)
d4cdbea5 1315 return r;
6a7a4e4d 1316 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1317 }
1318
c42ff3a1
WKI		 1319 if (link->address_messages == 0) {
1320 link->addresses_configured = true;
6aa5773b 1321 link_check_ready(link);
b425c3ae 1322 } else {
6a7a4e4d 1323 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1324 link_set_state(link, LINK_STATE_CONFIGURING);
1325 }
431ca2ce 1326
f882c247
TG		 1327 return 0;
1328}
1329
13b498f9 1330static int link_set_bridge_vlan(Link *link) {
86e2be7b 1331 int r;
13b498f9
TJ		 1332
1333 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1334 if (r < 0)
1335 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1336
1337 return r;
1338}
1339
a60a720c 1340static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1341 int r;
1342
1343 if (!link_proxy_arp_enabled(link))
1344 return 0;
1345
62e021a9 1346 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1347 if (r < 0)
1348 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1349
1350 return 0;
1351}
1352
3a390124 1353static int link_configure_continue(Link *link);
55dc8c4a 1354
302a796f 1355static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1356 int r;
1357
1358 assert(m);
1359 assert(link);
1360 assert(link->ifname);
1361
55dc8c4a
YW		 1362 link->setting_mtu = false;
1363
5da8149f 1364 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1365 return 1;
1366
1c4baffc 1367 r = sd_netlink_message_get_errno(m);
4ff296b0 1368 if (r < 0)
5ecb131d 1369 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1370 else
1371 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1372
4ff296b0 1373 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1374 r = link_configure_continue(link);
4ff296b0
YW		 1375 if (r < 0)
1376 link_enter_failed(link);
1377 }
4f882b2a
TG		 1378
1379 return 1;
1380}
1381
933c70a0 1382int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1383 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1384 int r;
1385
1386 assert(link);
1387 assert(link->manager);
1388 assert(link->manager->rtnl);
1389
40288ece
YW		 1390 if (mtu == 0 || link->setting_mtu)
1391 return 0;
1392
933c70a0 1393 if (link->mtu == mtu)
ee493106
YW		 1394 return 0;
1395
6a7a4e4d 1396 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1397
6a7a4e4d
LP		 1398 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1399 if (r < 0)
1400 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1401
44b598a1 1402 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1403 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1404 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1405
1406 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1407 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1408
72c2500b 1409 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1410 }
1411
1c4baffc 1412 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1413 if (r < 0)
1414 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1415
302a796f
YW		 1416 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1417 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1418 if (r < 0)
1419 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1420
ae941762 1421 link_ref(link);
1046bf9b 1422 link->setting_mtu = true;
b226d99b 1423
4f882b2a
TG		 1424 return 0;
1425}
1426
f6fcc1c2
YW		 1427static bool link_reduces_vlan_mtu(Link *link) {
1428 /* See netif_reduces_vlan_mtu() in kernel. */
1429 return streq_ptr(link->kind, "macsec");
1430}
1431
1432static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1433 uint32_t mtu = 0;
1434 NetDev *dev;
1435 Iterator i;
1436
1437 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1438 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1439 /* See vlan_dev_change_mtu() in kernel. */
1440 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1441
1442 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1443 /* See macvlan_change_mtu() in kernel. */
1444 mtu = dev->mtu;
1445
1446 return mtu;
1447}
1448
1449static int link_configure_mtu(Link *link) {
1450 uint32_t mtu;
1451
1452 assert(link);
1453 assert(link->network);
1454
1455 if (link->network->mtu > 0)
1456 return link_set_mtu(link, link->network->mtu);
1457
1458 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1459 if (link->mtu >= mtu)
1460 return 0;
1461
1462 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1463 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1464 link->mtu, mtu);
1465
1466 return link_set_mtu(link, mtu);
1467}
1468
302a796f 1469static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1470 int r;
1471
1472 assert(m);
1473 assert(link);
1474 assert(link->ifname);
1475
1476 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1477 return 1;
1478
1479 r = sd_netlink_message_get_errno(m);
1480 if (r < 0)
5ecb131d 1481 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1482
1483 return 1;
1484}
1485
1486static int link_set_flags(Link *link) {
1487 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1488 unsigned ifi_change = 0;
1489 unsigned ifi_flags = 0;
1490 int r;
1491
1492 assert(link);
1493 assert(link->manager);
1494 assert(link->manager->rtnl);
1495
1496 if (link->flags & IFF_LOOPBACK)
1497 return 0;
1498
1499 if (!link->network)
1500 return 0;
1501
866e6b7a 1502 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1503 return 0;
1504
1505 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1506 if (r < 0)
1507 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1508
1509 if (link->network->arp >= 0) {
1510 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1511 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1512 }
1513
1514 if (link->network->multicast >= 0) {
1515 ifi_change |= IFF_MULTICAST;
1516 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1517 }
1518
866e6b7a
SS		 1519 if (link->network->allmulticast >= 0) {
1520 ifi_change |= IFF_ALLMULTI;
1521 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1522 }
1523
99d2baa2
SS		 1524 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1525 if (r < 0)
1526 return log_link_error_errno(link, r, "Could not set link flags: %m");
1527
302a796f
YW		 1528 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1529 link_netlink_destroy_callback, link);
99d2baa2
SS		 1530 if (r < 0)
1531 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1532
1533 link_ref(link);
1534
1535 return 0;
1536}
1537
e7ab854c
TG		 1538static int link_acquire_ipv6_conf(Link *link) {
1539 int r;
1540
1541 assert(link);
1542
e7ab854c 1543 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1544 assert(link->ndisc);
e7ab854c
TG		 1545
1546 log_link_debug(link, "Discovering IPv6 routers");
1547
1e7a0e21 1548 r = sd_ndisc_start(link->ndisc);
63348d13 1549 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1550 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1551 }
1552
7465dd22
PF		 1553 if (link_radv_enabled(link)) {
1554 assert(link->radv);
1555 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1556
1557 log_link_debug(link, "Starting IPv6 Router Advertisements");
1558
fd3ef936
YW		 1559 r = radv_emit_dns(link);
1560 if (r < 0)
1561 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1562
7465dd22
PF		 1563 r = sd_radv_start(link->radv);
1564 if (r < 0 && r != -EBUSY)
1565 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1566 }
1567
838d39af
SS		 1568 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1569 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1570 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1571 assert(link->dhcp6_client);
1572 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1573
838d39af 1574 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1
SS		 1575 if (r < 0 && r != -EBUSY)
1576 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
1577 else
1578 log_link_debug(link, "Acquiring DHCPv6 lease");
1579 }
1580
10752343
PF		 1581 (void) dhcp6_request_prefix_delegation(link);
1582
e7ab854c
TG		 1583 return 0;
1584}
1585
6fc25497 1586static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1587 int r;
1588
1589 assert(link);
ff254138
TG		 1590 assert(link->manager);
1591 assert(link->manager->event);
1592
910feb78 1593 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1594 assert(link->ipv4ll);
ff254138 1595
6a7a4e4d 1596 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1597
1598 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1599 if (r < 0)
1600 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1601 }
1602
78c958f8 1603 if (link_dhcp4_enabled(link)) {
eb34d4af 1604 assert(link->dhcp_client);
ff254138 1605
6a7a4e4d 1606 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1607
5c1d3fc9 1608 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1609 if (r < 0)
1610 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1611 }
ff254138 1612
6fc25497
SS		 1613 return 0;
1614}
1615
1616static int link_acquire_conf(Link *link) {
1617 int r;
1618
1619 assert(link);
1620
1621 r = link_acquire_ipv4_conf(link);
1622 if (r < 0)
1623 return r;
1624
3f7cc080 1625 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1626 r = link_acquire_ipv6_conf(link);
1627 if (r < 0)
1628 return r;
1629 }
1630
7272b25e
LP		 1631 if (link_lldp_emit_enabled(link)) {
1632 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1633 if (r < 0)
1634 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1635 }
1636
ff254138
TG		 1637 return 0;
1638}
1639
a61bb41c 1640bool link_has_carrier(Link *link) {
deb2e523
TG		 1641 /* see Documentation/networking/operstates.txt in the kernel sources */
1642
a61bb41c 1643 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1644 return true;
1645
a61bb41c 1646 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1647 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1648 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1649 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1650 return true;
1651
1652 return false;
1653}
1654
0e2fdb83
SS		 1655static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1656 int r;
1657
1658 assert(link);
1659
9524014e
DS		 1660 link->setting_genmode = false;
1661
0e2fdb83
SS		 1662 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1663 return 1;
1664
1665 r = sd_netlink_message_get_errno(m);
1666 if (r < 0)
5ecb131d 1667 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1668 else
1669 log_link_debug(link, "Setting address genmode done.");
1670
1671 if (link->state == LINK_STATE_INITIALIZED) {
1672 r = link_configure_continue(link);
1673 if (r < 0)
1674 link_enter_failed(link);
1675 }
0e2fdb83
SS		 1676
1677 return 1;
1678}
1679
1680static int link_configure_addrgen_mode(Link *link) {
1681 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1682 uint8_t ipv6ll_mode;
1683 int r;
1684
1685 assert(link);
1686 assert(link->network);
1687 assert(link->manager);
1688 assert(link->manager->rtnl);
1689
9524014e 1690 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1691 return 0;
1692
0e2fdb83
SS		 1693 log_link_debug(link, "Setting address genmode for link");
1694
1695 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1696 if (r < 0)
1697 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1698
1699 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1700 if (r < 0)
1701 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1702
1703 r = sd_netlink_message_open_container(req, AF_INET6);
1704 if (r < 0)
1705 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1706
1707 if (!link_ipv6ll_enabled(link))
1708 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1709 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1710 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1711 if (r < 0) {
1712 /* The file may not exist. And even if it exists, when stable_secret is unset,
1713 * reading the file fails with EIO. */
1714 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1715
1716 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1717 } else
1718 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1719 } else
6f6296b9 1720 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1721
1722 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1723 if (r < 0)
1724 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1725
1726 r = sd_netlink_message_close_container(req);
1727 if (r < 0)
1728 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1729
1730 r = sd_netlink_message_close_container(req);
1731 if (r < 0)
1732 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1733
1734 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1735 link_netlink_destroy_callback, link);
1736 if (r < 0)
1737 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1738
1739 link_ref(link);
9524014e 1740 link->setting_genmode = true;
0e2fdb83
SS		 1741
1742 return 0;
1743}
1744
302a796f 1745static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1746 int r;
1747
1746cf2a
TG		 1748 assert(link);
1749
5da8149f 1750 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1751 return 1;
1752
1c4baffc 1753 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1754 if (r < 0)
26d6b214 1755 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1756 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1757
f882c247
TG		 1758 return 1;
1759}
1760
1cc84f3b 1761static int link_up(Link *link) {
4afd3348 1762 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1763 int r;
1764
f882c247 1765 assert(link);
c106cc36 1766 assert(link->network);
f882c247
TG		 1767 assert(link->manager);
1768 assert(link->manager->rtnl);
1769
6a7a4e4d 1770 log_link_debug(link, "Bringing link up");
449f7554 1771
6a7a4e4d
LP		 1772 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1773 if (r < 0)
1774 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1775
2b2d8603 1776 /* set it free if not enslaved with networkd */
6cb955c6 1777 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1778 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1779 if (r < 0)
1780 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1781 }
1782
5d4795f3 1783 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1784 if (r < 0)
1785 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1786
c106cc36 1787 if (link->network->mac) {
1c4baffc 1788 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1789 if (r < 0)
1790 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1791 }
1792
302a796f
YW		 1793 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1794 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1795 if (r < 0)
1796 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1797
b226d99b
TG		 1798 link_ref(link);
1799
f882c247
TG		 1800 return 0;
1801}
1802
302a796f 1803static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1804 int r;
1805
1806 assert(link);
1807
1808 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1809 return 1;
1810
1c4baffc 1811 r = sd_netlink_message_get_errno(m);
0d4ad91d 1812 if (r < 0)
5ecb131d 1813 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1814
1815 return 1;
1816}
1817
8e54db83 1818int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1819 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1820 int r;
1821
1822 assert(link);
1823 assert(link->manager);
1824 assert(link->manager->rtnl);
1825
6a7a4e4d 1826 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1827
1828 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1829 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1830 if (r < 0)
1831 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1832
1833 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1834 if (r < 0)
1835 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1836
8e54db83
YW		 1837 r = netlink_call_async(link->manager->rtnl, NULL, req,
1838 callback ?: link_down_handler,
302a796f 1839 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1840 if (r < 0)
1841 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1842
1843 link_ref(link);
1844
1845 return 0;
1846}
1847
89fe6535
SS		 1848static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1849 int r;
1850
1851 assert(link);
1852
1853 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1854 return 1;
1855
1856 r = sd_netlink_message_get_errno(m);
1857 if (r < 0)
1858 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1859
1860 return 1;
1861}
1862
1863static int link_set_group(Link *link) {
1864 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1865 int r;
1866
1867 assert(link);
1868 assert(link->network);
1869 assert(link->manager);
1870 assert(link->manager->rtnl);
1871
1872 if (link->network->group <= 0)
1873 return 0;
1874
1875 log_link_debug(link, "Setting group");
1876
1877 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1878 if (r < 0)
1879 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1880
1881 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1882 if (r < 0)
1883 return log_link_error_errno(link, r, "Could not set link group: %m");
1884
1885 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1886 link_netlink_destroy_callback, link);
1887 if (r < 0)
1888 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1889
1890 link_ref(link);
1891
1892 return 0;
1893}
1894
0d4ad91d
AR		 1895static int link_handle_bound_to_list(Link *link) {
1896 Link *l;
1897 Iterator i;
1898 int r;
1899 bool required_up = false;
1900 bool link_is_up = false;
1901
1902 assert(link);
1903
1904 if (hashmap_isempty(link->bound_to_links))
1905 return 0;
1906
1907 if (link->flags & IFF_UP)
1908 link_is_up = true;
1909
1910 HASHMAP_FOREACH (l, link->bound_to_links, i)
1911 if (link_has_carrier(l)) {
1912 required_up = true;
1913 break;
1914 }
1915
1916 if (!required_up && link_is_up) {
8e54db83 1917 r = link_down(link, NULL);
0d4ad91d
AR		 1918 if (r < 0)
1919 return r;
1920 } else if (required_up && !link_is_up) {
1921 r = link_up(link);
1922 if (r < 0)
1923 return r;
1924 }
1925
1926 return 0;
1927}
1928
1929static int link_handle_bound_by_list(Link *link) {
1930 Iterator i;
1931 Link *l;
1932 int r;
1933
1934 assert(link);
1935
1936 if (hashmap_isempty(link->bound_by_links))
1937 return 0;
1938
1939 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1940 r = link_handle_bound_to_list(l);
1941 if (r < 0)
1942 return r;
1943 }
1944
1945 return 0;
1946}
1947
1948static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1949 int r;
1950
1951 assert(link);
1952 assert(carrier);
1953
1954 if (link == carrier)
1955 return 0;
1956
1957 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1958 return 0;
1959
1960 r = hashmap_ensure_allocated(h, NULL);
1961 if (r < 0)
1962 return r;
1963
1964 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1965 if (r < 0)
1966 return r;
1967
1968 return 0;
1969}
1970
1971static int link_new_bound_by_list(Link *link) {
1972 Manager *m;
1973 Link *carrier;
1974 Iterator i;
1975 int r;
1976 bool list_updated = false;
1977
1978 assert(link);
1979 assert(link->manager);
1980
1981 m = link->manager;
1982
b295beea 1983 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1984 if (!carrier->network)
1985 continue;
1986
1987 if (strv_isempty(carrier->network->bind_carrier))
1988 continue;
1989
191a3f16 1990 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1991 r = link_put_carrier(link, carrier, &link->bound_by_links);
1992 if (r < 0)
1993 return r;
1994
1995 list_updated = true;
1996 }
1997 }
1998
1999 if (list_updated)
84de38c5 2000 link_dirty(link);
0d4ad91d 2001
b295beea 2002 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2003 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2004 if (r < 0)
2005 return r;
2006
84de38c5 2007 link_dirty(carrier);
0d4ad91d
AR		 2008 }
2009
2010 return 0;
2011}
2012
2013static int link_new_bound_to_list(Link *link) {
2014 Manager *m;
2015 Link *carrier;
2016 Iterator i;
2017 int r;
2018 bool list_updated = false;
2019
2020 assert(link);
2021 assert(link->manager);
2022
2023 if (!link->network)
2024 return 0;
2025
2026 if (strv_isempty(link->network->bind_carrier))
2027 return 0;
2028
2029 m = link->manager;
2030
2031 HASHMAP_FOREACH (carrier, m->links, i) {
191a3f16 2032 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2033 r = link_put_carrier(link, carrier, &link->bound_to_links);
2034 if (r < 0)
2035 return r;
2036
2037 list_updated = true;
2038 }
2039 }
2040
2041 if (list_updated)
84de38c5 2042 link_dirty(link);
0d4ad91d
AR		 2043
2044 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2045 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2046 if (r < 0)
2047 return r;
2048
84de38c5 2049 link_dirty(carrier);
0d4ad91d
AR		 2050 }
2051
2052 return 0;
2053}
2054
2055static int link_new_carrier_maps(Link *link) {
2056 int r;
2057
2058 r = link_new_bound_by_list(link);
2059 if (r < 0)
2060 return r;
2061
2062 r = link_handle_bound_by_list(link);
2063 if (r < 0)
2064 return r;
2065
2066 r = link_new_bound_to_list(link);
2067 if (r < 0)
2068 return r;
2069
2070 r = link_handle_bound_to_list(link);
2071 if (r < 0)
2072 return r;
2073
2074 return 0;
2075}
2076
2077static void link_free_bound_to_list(Link *link) {
2078 Link *bound_to;
2079 Iterator i;
2080
2081 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2082 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2083
2084 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2085 link_dirty(bound_to);
0d4ad91d
AR		 2086 }
2087
2088 return;
2089}
2090
2091static void link_free_bound_by_list(Link *link) {
2092 Link *bound_by;
2093 Iterator i;
2094
2095 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2096 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2097
2098 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2099 link_dirty(bound_by);
0d4ad91d
AR		 2100 link_handle_bound_to_list(bound_by);
2101 }
2102 }
2103
2104 return;
2105}
2106
2107static void link_free_carrier_maps(Link *link) {
2108 bool list_updated = false;
2109
2110 assert(link);
2111
2112 if (!hashmap_isempty(link->bound_to_links)) {
2113 link_free_bound_to_list(link);
2114 list_updated = true;
2115 }
2116
2117 if (!hashmap_isempty(link->bound_by_links)) {
2118 link_free_bound_by_list(link);
2119 list_updated = true;
2120 }
2121
2122 if (list_updated)
84de38c5 2123 link_dirty(link);
0d4ad91d
AR		 2124
2125 return;
2126}
2127
5f707e12
YW		 2128static int link_append_to_master(Link *link, NetDev *netdev) {
2129 Link *master;
2130 int r;
2131
2132 assert(link);
2133 assert(netdev);
2134
2135 r = link_get(link->manager, netdev->ifindex, &master);
2136 if (r < 0)
2137 return r;
2138
de7fef4b 2139 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2140 if (r <= 0)
5f707e12
YW		 2141 return r;
2142
2143 link_ref(link);
2144 return 0;
2145}
2146
2147static void link_drop_from_master(Link *link, NetDev *netdev) {
2148 Link *master;
2149
2150 assert(link);
2151
2152 if (!link->manager || !netdev)
2153 return;
2154
2155 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2156 return;
2157
2158 link_unref(set_remove(master->slaves, link));
2159}
2160
2161static void link_detach_from_manager(Link *link) {
2162 if (!link || !link->manager)
2163 return;
2164
2165 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2166 link_clean(link);
2167
2168 /* The following must be called at last. */
2169 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2170 link_unref(link);
2171}
2172
0d4ad91d
AR		 2173void link_drop(Link *link) {
2174 if (!link || link->state == LINK_STATE_LINGER)
2175 return;
2176
2177 link_set_state(link, LINK_STATE_LINGER);
2178
2179 link_free_carrier_maps(link);
2180
5f707e12
YW		 2181 if (link->network) {
2182 link_drop_from_master(link, link->network->bridge);
2183 link_drop_from_master(link, link->network->bond);
2184 }
2185
6a7a4e4d 2186 log_link_debug(link, "Link removed");
0d4ad91d 2187
db2f8a2e 2188 (void) unlink(link->state_file);
c4397d94 2189 link_detach_from_manager(link);
0d4ad91d
AR		 2190}
2191
3f265037 2192static int link_joined(Link *link) {
f882c247
TG		 2193 int r;
2194
ef1ba606 2195 assert(link);
f5be5601 2196 assert(link->network);
dd3efc09 2197
0d4ad91d
AR		 2198 if (!hashmap_isempty(link->bound_to_links)) {
2199 r = link_handle_bound_to_list(link);
2200 if (r < 0)
2201 return r;
2202 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2203 r = link_up(link);
2204 if (r < 0) {
2205 link_enter_failed(link);
2206 return r;
2207 }
ef1ba606 2208 }
f882c247 2209
9ed794a3 2210 if (link->network->bridge) {
e1853b00 2211 r = link_set_bridge(link);
6a7a4e4d
LP		 2212 if (r < 0)
2213 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2214
2215 r = link_append_to_master(link, link->network->bridge);
2216 if (r < 0)
2217 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2218 }
2219
eb64b435 2220 if (link->network->bond) {
7fcee284 2221 r = link_set_bond(link);
eb64b435
SS		 2222 if (r < 0)
2223 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2224
45e11abf 2225 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2226 if (r < 0)
2227 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2228 }
2229
ffff9abe
TJ		 2230 if (link->network->use_br_vlan &&
2231 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2232 r = link_set_bridge_vlan(link);
2233 if (r < 0)
2234 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2235 }
2236
c1835a42
RM		 2237 /* Skip setting up addresses until it gets carrier,
2238 or it would try to set addresses twice,
2239 which is bad for non-idempotent steps. */
dad2d78e 2240 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2241 return 0;
2242
b425c3ae 2243 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2244 return link_request_set_addresses(link);
02b59d57
TG		 2245}
2246
302a796f 2247static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2248 int r;
2249
1746cf2a 2250 assert(link);
ef1ba606 2251 assert(link->network);
34bf3c00 2252 assert(link->enslaving > 0);
02b59d57 2253
313cefa1 2254 link->enslaving--;
52433f6b 2255
5da8149f 2256 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2257 return 1;
2258
1c4baffc 2259 r = sd_netlink_message_get_errno(m);
856f962c 2260 if (r < 0 && r != -EEXIST) {
5ecb131d 2261 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2262 link_enter_failed(link);
2263 return 1;
4ff296b0
YW		 2264 }
2265
2266 log_link_debug(link, "Joined netdev");
02b59d57 2267
34bf3c00 2268 if (link->enslaving == 0) {
4ff296b0
YW		 2269 r = link_joined(link);
2270 if (r < 0)
2271 link_enter_failed(link);
34bf3c00 2272 }
02b59d57
TG		 2273
2274 return 1;
2275}
2276
3f265037 2277static int link_enter_join_netdev(Link *link) {
6a0a2f86 2278 NetDev *netdev;
672682a6 2279 Iterator i;
02b59d57
TG		 2280 int r;
2281
2282 assert(link);
2283 assert(link->network);
bd08ce56 2284 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2285
289e6774 2286 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2287
84de38c5 2288 link_dirty(link);
34bf3c00 2289 link->enslaving = 0;
02b59d57 2290
d9c67ea1 2291 if (link->network->bond) {
cbff7170
TJ		 2292 if (link->network->bond->state == NETDEV_STATE_READY &&
2293 link->network->bond->ifindex == link->master_ifindex)
2294 return link_joined(link);
2295
f2341e0a
LP		 2296 log_struct(LOG_DEBUG,
2297 LOG_LINK_INTERFACE(link),
2298 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2299 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2300
34bf3c00
YW		 2301 link->enslaving++;
2302
f2341e0a 2303 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2304 if (r < 0) {
f2341e0a
LP		 2305 log_struct_errno(LOG_WARNING, r,
2306 LOG_LINK_INTERFACE(link),
2307 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2308 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2309 link_enter_failed(link);
2310 return r;
2311 }
0ad6148e
MO		 2312 }
2313
d9c67ea1 2314 if (link->network->bridge) {
f2341e0a
LP		 2315 log_struct(LOG_DEBUG,
2316 LOG_LINK_INTERFACE(link),
2317 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2318 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2319
34bf3c00
YW		 2320 link->enslaving++;
2321
f2341e0a 2322 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2323 if (r < 0) {
f2341e0a
LP		 2324 log_struct_errno(LOG_WARNING, r,
2325 LOG_LINK_INTERFACE(link),
2326 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2327 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2328 link_enter_failed(link);
2329 return r;
2330 }
52433f6b
TG		 2331 }
2332
6cb955c6
AR		 2333 if (link->network->vrf) {
2334 log_struct(LOG_DEBUG,
2335 LOG_LINK_INTERFACE(link),
2336 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2337 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2338
34bf3c00
YW		 2339 link->enslaving++;
2340
6cb955c6
AR		 2341 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2342 if (r < 0) {
2343 log_struct_errno(LOG_WARNING, r,
2344 LOG_LINK_INTERFACE(link),
2345 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2346 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2347 link_enter_failed(link);
2348 return r;
2349 }
6cb955c6
AR		 2350 }
2351
6a0a2f86 2352 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2353
2b6db913
YW		 2354 if (netdev->ifindex > 0)
2355 /* Assume already enslaved. */
a63e5daa 2356 continue;
a63e5daa 2357
7033af49
YW		 2358 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2359 continue;
2360
f2341e0a
LP		 2361 log_struct(LOG_DEBUG,
2362 LOG_LINK_INTERFACE(link),
2363 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2364 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2365
34bf3c00
YW		 2366 link->enslaving++;
2367
f2341e0a 2368 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2369 if (r < 0) {
f2341e0a
LP		 2370 log_struct_errno(LOG_WARNING, r,
2371 LOG_LINK_INTERFACE(link),
2372 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2373 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2374 link_enter_failed(link);
2375 return r;
2376 }
326cb406
SS		 2377 }
2378
34bf3c00
YW		 2379 if (link->enslaving == 0)
2380 return link_joined(link);
2381
ef1ba606
TG		 2382 return 0;
2383}
2384
769d324c 2385static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2386 int r;
2387
765afd5c 2388 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2389 return 0;
2390
765afd5c
LP		 2391 /* We propagate the forwarding flag from one interface to the
2392 * global setting one way. This means: as long as at least one
2393 * interface was configured at any time that had IP forwarding
2394 * enabled the setting will stay on for good. We do this
2395 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2396 * somewhat in sync (see below). */
15dee3f0 2397
62e021a9 2398 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2399 if (r < 0)
765afd5c 2400 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2401
769d324c
LP		 2402 return 0;
2403}
2404
2405static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2406 int r;
2407
765afd5c 2408 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2409 return 0;
2410
61233823 2411 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2412 * packet forwarding setting: either packet forwarding is on
2413 * for all, or off for all. We hence don't bother with a
2414 * per-interface setting, but simply propagate the interface
2415 * flag, if it is set, to the global flag, one-way. Note that
2416 * while IPv4 would allow a per-interface flag, we expose the
2417 * same behaviour there and also propagate the setting from
2418 * one to all, to keep things simple (see above). */
15dee3f0 2419
62e021a9 2420 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2421 if (r < 0)
765afd5c 2422 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2423
2424 return 0;
2425}
2426
49092e22 2427static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2428 IPv6PrivacyExtensions s;
49092e22
SS		 2429 int r;
2430
1f0d9695 2431 s = link_ipv6_privacy_extensions(link);
66a6bd68 2432 if (s < 0)
49092e22
SS		 2433 return 0;
2434
62e021a9 2435 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2436 if (r < 0)
49092e22
SS		 2437 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2438
2439 return 0;
2440}
2441
4f2e437a 2442static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2443 int r;
2444
2445 /* Make this a NOP if IPv6 is not available */
2446 if (!socket_ipv6_is_supported())
2447 return 0;
2448
2449 if (link->flags & IFF_LOOPBACK)
2450 return 0;
2451
d68e2e59
LP		 2452 if (!link->network)
2453 return 0;
2454
62e021a9 2455 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2456 if (r < 0)
fe307276 2457 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2458
2459 return 0;
2460}
2461
8749cbcd 2462static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2463 int r;
2464
2465 /* Make this a NOP if IPv6 is not available */
2466 if (!socket_ipv6_is_supported())
2467 return 0;
2468
2469 if (link->flags & IFF_LOOPBACK)
2470 return 0;
2471
d68e2e59
LP		 2472 if (!link->network)
2473 return 0;
2474
8749cbcd
SS		 2475 if (link->network->ipv6_dad_transmits < 0)
2476 return 0;
2477
62e021a9 2478 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2479 if (r < 0)
8749cbcd 2480 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2481
2482 return 0;
2483}
2484
b69c3180 2485static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2486 int r;
2487
2488 /* Make this a NOP if IPv6 is not available */
2489 if (!socket_ipv6_is_supported())
2490 return 0;
2491
2492 if (link->flags & IFF_LOOPBACK)
2493 return 0;
2494
d68e2e59
LP		 2495 if (!link->network)
2496 return 0;
2497
b69c3180
SS		 2498 if (link->network->ipv6_hop_limit < 0)
2499 return 0;
2500
62e021a9 2501 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2502 if (r < 0)
b69c3180 2503 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2504
2505 return 0;
2506}
2507
11102cba 2508static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2509 int r;
2510
2511 /* Make this a NOP if IPv6 is not available */
2512 if (!socket_ipv6_is_supported())
2513 return 0;
2514
2515 if (link->flags & IFF_LOOPBACK)
2516 return 0;
2517
2518 if (link->network->ipv6_mtu == 0)
2519 return 0;
2520
d236718c
DS		 2521 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2522 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2523 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2524 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2525 link->network->ipv6_mtu = IPV6_MIN_MTU;
2526 }
2527
62e021a9 2528 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2529 if (r < 0) {
2530 if (link->mtu < link->network->ipv6_mtu)
2531 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2532 link->network->ipv6_mtu, link->mtu);
2533 else
2534 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2535 }
2536
2537 link->ipv6_mtu_set = true;
11102cba
SS		 2538
2539 return 0;
2540}
2541
94d76d07
YW		 2542static int link_set_ipv4_accept_local(Link *link) {
2543 int r;
2544
2545 if (link->flags & IFF_LOOPBACK)
2546 return 0;
2547
2548 if (link->network->ipv4_accept_local < 0)
2549 return 0;
2550
2551 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2552 if (r < 0)
2553 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2554
2555 return 0;
2556}
2557
30226d27
TJ		 2558static bool link_is_static_address_configured(Link *link, Address *address) {
2559 Address *net_address;
2560
2561 assert(link);
2562 assert(address);
2563
2564 if (!link->network)
2565 return false;
2566
2567 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2568 if (address_equal(net_address, address))
2569 return true;
2570
2571 return false;
2572}
2573
d1bdafd2
WKI		 2574static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2575 Neighbor *net_neighbor;
2576
2577 assert(link);
2578 assert(neighbor);
2579
2580 if (!link->network)
2581 return false;
2582
2583 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2584 if (neighbor_equal(net_neighbor, neighbor))
2585 return true;
2586
2587 return false;
2588}
2589
7ecf0c3e
TJ		 2590static bool link_is_static_route_configured(Link *link, Route *route) {
2591 Route *net_route;
2592
2593 assert(link);
2594 assert(route);
2595
2596 if (!link->network)
2597 return false;
2598
2599 LIST_FOREACH(routes, net_route, link->network->static_routes)
2600 if (route_equal(net_route, route))
2601 return true;
2602
2603 return false;
2604}
2605
db51778f
YW		 2606static bool link_address_is_dynamic(Link *link, Address *address) {
2607 Route *route;
2608 Iterator i;
2609
2610 assert(link);
2611 assert(address);
2612
2613 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2614 return true;
2615
2616 /* Even when the address is leased from a DHCP server, networkd assign the address
2617 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2618 * corresponding routes with RTPROT_DHCP. */
2619 SET_FOREACH(route, link->routes_foreign, i) {
2620 if (route->protocol != RTPROT_DHCP)
2621 continue;
2622
2623 if (address->family != route->family)
2624 continue;
2625
2626 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2627 return true;
2628 }
2629
2630 return false;
2631}
2632
0917a271
DS		 2633static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2634 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2635 sd_netlink_message *addr;
2636 int r;
2637
2638 assert(link);
2639 assert(link->manager);
2640 assert(link->manager->rtnl);
2641
2642 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2643 if (r < 0)
2644 return r;
2645
2646 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2647 if (r < 0)
2648 return r;
2649
2650 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2651 unsigned char flags;
2652 int ifindex;
2653
2654 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2655 if (r < 0) {
2656 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2657 continue;
2658 } else if (link->ifindex != ifindex)
2659 continue;
2660
2661 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2662 if (r < 0) {
2663 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2664 continue;
2665 } else if (!(flags & IFA_F_TENTATIVE))
2666 continue;
2667
2668 log_link_debug(link, "Found tentative ipv6 link-local address");
2669 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2670 }
2671
2672 return 0;
2673}
2674
5e5b137a
TG		 2675static int link_drop_foreign_config(Link *link) {
2676 Address *address;
d1bdafd2 2677 Neighbor *neighbor;
5e5b137a
TG		 2678 Route *route;
2679 Iterator i;
2680 int r;
2681
0917a271
DS		 2682 /* The kernel doesn't notify us about tentative addresses;
2683 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2684 if (!link_ipv6ll_enabled(link)) {
2685 r = link_enumerate_ipv6_tentative_addresses(link);
2686 if (r < 0)
2687 return r;
2688 }
2689
5e5b137a 2690 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2691 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2692 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2693 continue;
2694
db51778f 2695 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2696 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2697 continue;
b1b0b42e 2698 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2699 continue;
2700
30226d27
TJ		 2701 if (link_is_static_address_configured(link, address)) {
2702 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2703 if (r < 0)
2704 return log_link_error_errno(link, r, "Failed to add address: %m");
2705 } else {
63ae0569 2706 r = address_remove(address, link, NULL);
30226d27
TJ		 2707 if (r < 0)
2708 return r;
2709 }
5e5b137a
TG		 2710 }
2711
d1bdafd2
WKI		 2712 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2713 if (link_is_neighbor_configured(link, neighbor)) {
2714 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2715 if (r < 0)
2716 return r;
2717 } else {
2718 r = neighbor_remove(neighbor, link, NULL);
2719 if (r < 0)
2720 return r;
2721 }
2722 }
2723
5e5b137a 2724 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2725 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2726 if (route->protocol == RTPROT_KERNEL)
2727 continue;
2728
bd7d6cec
YW		 2729 /* do not touch multicast route added by kernel */
2730 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2731 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2732 if (route->protocol == RTPROT_BOOT &&
2733 route->family == AF_INET6 &&
2734 route->dst_prefixlen == 8 &&
2735 in_addr_equal(AF_INET6, &route->dst, &(union in_addr_union) { .in6 = {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}} }))
2736 continue;
2737
b1b0b42e 2738 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2739 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2740 continue;
2741
b1b0b42e 2742 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2743 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2744 continue;
2745
7ecf0c3e 2746 if (link_is_static_route_configured(link, route)) {
f1368755 2747 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2748 if (r < 0)
2749 return r;
2750 } else {
4645ad47 2751 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2752 if (r < 0)
2753 return r;
2754 }
5e5b137a
TG		 2755 }
2756
2757 return 0;
2758}
2759
3104883d 2760static int link_drop_config(Link *link) {
410a7f15 2761 Address *address, *pool_address;
d1bdafd2 2762 Neighbor *neighbor;
3104883d
SS		 2763 Route *route;
2764 Iterator i;
2765 int r;
2766
2767 SET_FOREACH(address, link->addresses, i) {
2768 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2769 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2770 continue;
2771
63ae0569 2772 r = address_remove(address, link, NULL);
3104883d
SS		 2773 if (r < 0)
2774 return r;
410a7f15
RM		 2775
2776 /* If this address came from an address pool, clean up the pool */
2777 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2778 if (address_equal(address, pool_address)) {
2779 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2780 address_free(pool_address);
2781 break;
2782 }
2783 }
3104883d
SS		 2784 }
2785
d1bdafd2
WKI		 2786 SET_FOREACH(neighbor, link->neighbors, i) {
2787 r = neighbor_remove(neighbor, link, NULL);
2788 if (r < 0)
2789 return r;
2790 }
2791
3104883d
SS		 2792 SET_FOREACH(route, link->routes, i) {
2793 /* do not touch routes managed by the kernel */
2794 if (route->protocol == RTPROT_KERNEL)
2795 continue;
2796
4645ad47 2797 r = route_remove(route, link, NULL);
3104883d
SS		 2798 if (r < 0)
2799 return r;
2800 }
2801
c69305ff
LP		 2802 ndisc_flush(link);
2803
3104883d
SS		 2804 return 0;
2805}
2806
051e77ca
SS		 2807static int link_configure_ipv4_dad(Link *link) {
2808 Address *address;
2809 int r;
2810
2811 assert(link);
2812 assert(link->network);
2813
2814 LIST_FOREACH(addresses, address, link->network->static_addresses)
2815 if (address->family == AF_INET &&
2816 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2817 r = configure_ipv4_duplicate_address_detection(link, address);
2818 if (r < 0)
2819 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2820 }
2821
2822 return 0;
2823}
2824
34658df2
YW		 2825static int link_configure_traffic_control(Link *link) {
2826 TrafficControl *tc;
0f5bd7fe 2827 Iterator i;
02b59d57
TG		 2828 int r;
2829
34658df2
YW		 2830 link->tc_configured = false;
2831 link->tc_messages = 0;
4ecdcb07 2832
34658df2
YW		 2833 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section, i) {
2834 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2835 if (r < 0)
2836 return r;
2837 }
2838
34658df2
YW		 2839 if (link->tc_messages == 0)
2840 link->tc_configured = true;
4ecdcb07 2841 else
34658df2 2842 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2843
2844 return 0;
2845}
2846
518cd6b5
SS		 2847static int link_configure_sr_iov(Link *link) {
2848 SRIOV *sr_iov;
2849 Iterator i;
2850 int r;
2851
2852 link->sr_iov_configured = false;
2853 link->sr_iov_messages = 0;
2854
2855 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section, i) {
2856 r = sr_iov_configure(link, sr_iov);
2857 if (r < 0)
2858 return r;
2859 }
2860
2861 if (link->sr_iov_messages == 0)
2862 link->sr_iov_configured = true;
2863 else
2864 log_link_debug(link, "Configuring SR-IOV");
2865
2866 return 0;
2867}
2868
4ecdcb07
YW		 2869static int link_configure(Link *link) {
2870 int r;
2871
ef1ba606 2872 assert(link);
b22d8a00 2873 assert(link->network);
bd08ce56 2874 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2875
34658df2 2876 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2877 if (r < 0)
2878 return r;
2879
518cd6b5
SS		 2880 r = link_configure_sr_iov(link);
2881 if (r < 0)
2882 return r;
2883
500b96eb 2884 if (link->iftype == ARPHRD_CAN)
93ea7750 2885 return link_configure_can(link);
92c918b0 2886
482efedc
SS		 2887 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2888 * for this interface, then enable IPv6 */
57ad7607 2889 (void) link_update_ipv6_sysctl(link);
482efedc 2890
23d8b221
SS		 2891 r = link_set_proxy_arp(link);
2892 if (r < 0)
2893 return r;
2894
a0e5c15d
FK		 2895 r = ipv6_proxy_ndp_addresses_configure(link);
2896 if (r < 0)
2897 return r;
2898
769d324c
LP		 2899 r = link_set_ipv4_forward(link);
2900 if (r < 0)
2901 return r;
2902
2903 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2904 if (r < 0)
2905 return r;
2906
49092e22
SS		 2907 r = link_set_ipv6_privacy_extensions(link);
2908 if (r < 0)
2909 return r;
2910
4f2e437a
SS		 2911 r = link_set_ipv6_accept_ra(link);
2912 if (r < 0)
2913 return r;
2914
8749cbcd
SS		 2915 r = link_set_ipv6_dad_transmits(link);
2916 if (r < 0)
2917 return r;
b69c3180
SS		 2918
2919 r = link_set_ipv6_hop_limit(link);
2920 if (r < 0)
2921 return r;
8749cbcd 2922
94d76d07
YW		 2923 r = link_set_ipv4_accept_local(link);
2924 if (r < 0)
2925 return r;
2926
99d2baa2
SS		 2927 r = link_set_flags(link);
2928 if (r < 0)
2929 return r;
2930
89fe6535
SS		 2931 r = link_set_group(link);
2932 if (r < 0)
2933 return r;
2934
910feb78 2935 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2936 r = ipv4ll_configure(link);
eb34d4af
TG		 2937 if (r < 0)
2938 return r;
2939 }
2940
78c958f8 2941 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2942 r = dhcp4_set_promote_secondaries(link);
2943 if (r < 0)
2944 return r;
2945
3c9b8860 2946 r = dhcp4_configure(link);
eb34d4af
TG		 2947 if (r < 0)
2948 return r;
eb34d4af
TG		 2949 }
2950
78c958f8 2951 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2952 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2953 if (r < 0)
2954 return r;
2955
2956 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2957 if (r < 0)
2958 return r;
dd43110f
TG		 2959 }
2960
62379e88
TG		 2961 if (link_dhcp6_enabled(link) ||
2962 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2963 r = dhcp6_configure(link);
2964 if (r < 0)
2965 return r;
2966 }
2967
2968 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2969 r = ndisc_configure(link);
4138fb2c
PF		 2970 if (r < 0)
2971 return r;
2972 }
2973
7465dd22
PF		 2974 if (link_radv_enabled(link)) {
2975 r = radv_configure(link);
2976 if (r < 0)
2977 return r;
2978 }
2979
8e1ad1ea 2980 if (link_lldp_rx_enabled(link)) {
7f853950 2981 r = link_lldp_rx_configure(link);
273eec24
LP		 2982 if (r < 0)
2983 return r;
ce43e484
SS		 2984 }
2985
f6fcc1c2 2986 r = link_configure_mtu(link);
40288ece
YW		 2987 if (r < 0)
2988 return r;
44b598a1 2989
9f6e82e6
YW		 2990 r = link_configure_addrgen_mode(link);
2991 if (r < 0)
2992 return r;
0e2fdb83 2993
051e77ca
SS		 2994 r = link_configure_ipv4_dad(link);
2995 if (r < 0)
2996 return r;
2997
3a390124
DS		 2998 return link_configure_continue(link);
2999}
3000
3001/* The configuration continues in this separate function, instead of
3002 * including this in the above link_configure() function, for two
3003 * reasons:
3004 * 1) some devices reset the link when the mtu is set, which caused
3005 * an infinite loop here in networkd; see:
3006 * https://github.com/systemd/systemd/issues/6593
3007 * https://github.com/systemd/systemd/issues/9831
3008 * 2) if ipv6ll is disabled, then bringing the interface up must be
3009 * delayed until after we get confirmation from the kernel that
3010 * the addr_gen_mode parameter has been set (via netlink), see:
3011 * https://github.com/systemd/systemd/issues/13882
3012 */
3013static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3014 int r;
3015
3016 assert(link);
3017 assert(link->network);
bd08ce56 3018 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3019
9524014e 3020 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3021 return 0;
3022
4c649652
DS		 3023 /* Drop foreign config, but ignore loopback or critical devices.
3024 * We do not want to remove loopback address or addresses used for root NFS. */
3025 if (!(link->flags & IFF_LOOPBACK) &&
3026 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3027 r = link_drop_foreign_config(link);
3028 if (r < 0)
3029 return r;
3030 }
3031
d236718c
DS		 3032 /* The kernel resets ipv6 mtu after changing device mtu;
3033 * we must set this here, after we've set device mtu */
3034 r = link_set_ipv6_mtu(link);
3035 if (r < 0)
3036 return r;
3037
dad2d78e 3038 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3039 r = link_acquire_conf(link);
3040 if (r < 0)
3041 return r;
cc544d5f 3042 }
1e9be60b 3043
3f265037 3044 return link_enter_join_netdev(link);
505f8da7
TG		 3045}
3046
27dfc982
YW		 3047static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3048 assert(duid);
3049
3050 if (duid->raw_data_len > 0)
3051 return 0;
3052
3053 if (duid->type != DUID_TYPE_UUID)
3054 return -EINVAL;
3055
3056 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3057 duid->raw_data_len = sizeof(sd_id128_t);
3058
3059 return 1;
3060}
3061
3062int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3063 Manager *manager = userdata;
3064 const sd_bus_error *e;
3065 const void *a;
3066 size_t sz;
3067 DUID *duid;
3068 Link *link;
3069 int r;
3070
3071 assert(m);
3072 assert(manager);
3073
3074 e = sd_bus_message_get_error(m);
3075 if (e) {
3076 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3077 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3078 e->message);
3079 goto configure;
3080 }
3081
3082 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3083 if (r < 0)
3084 goto configure;
3085
3086 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3087 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3088 goto configure;
3089 }
3090
3091 memcpy(&manager->product_uuid, a, sz);
3092 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3093 (void) duid_set_uuid(duid, manager->product_uuid);
3094
3095 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3096
3097configure:
3098 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3099 link_unref(link);
3100
27dfc982
YW		 3101 r = link_configure(link);
3102 if (r < 0)
4ff296b0 3103 link_enter_failed(link);
27dfc982
YW		 3104 }
3105
3106 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3107
3108 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3109 * even if the method fails. */
3110 manager->has_product_uuid = true;
3111
3112 return 1;
3113}
3114
3115static bool link_requires_uuid(Link *link) {
3116 const DUID *duid;
3117
3118 assert(link);
3119 assert(link->manager);
3120 assert(link->network);
3121
3122 duid = link_get_duid(link);
3123 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3124 return false;
3125
3126 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3127 return true;
3128
3129 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3130 return true;
3131
3132 return false;
3133}
3134
3135static int link_configure_duid(Link *link) {
3136 Manager *m;
3137 DUID *duid;
3138 int r;
3139
3140 assert(link);
3141 assert(link->manager);
3142 assert(link->network);
3143
3144 m = link->manager;
3145 duid = link_get_duid(link);
3146
3147 if (!link_requires_uuid(link))
3148 return 1;
3149
3150 if (m->has_product_uuid) {
3151 (void) duid_set_uuid(duid, m->product_uuid);
3152 return 1;
3153 }
3154
3155 if (!m->links_requesting_uuid) {
3156 r = manager_request_product_uuid(m, link);
3157 if (r < 0) {
3158 if (r == -ENOMEM)
3159 return r;
3160
ab4dd984
ZJS		 3161 log_link_warning_errno(link, r,
3162 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3163 return 1;
3164 }
3165 } else {
3166 r = set_put(m->links_requesting_uuid, link);
3167 if (r < 0)
3168 return log_oom();
39dbd0c7
ZJS		 3169 if (r > 0)
3170 link_ref(link);
27dfc982
YW		 3171
3172 r = set_put(m->duids_requesting_uuid, duid);
3173 if (r < 0)
3174 return log_oom();
3175 }
3176
3177 return 0;
3178}
3179
572b21d9 3180static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3181 Network *network;
3182 int r;
3183
572b21d9
YW		 3184 if (m) {
3185 _cleanup_strv_free_ char **s = NULL;
3186
3187 r = sd_netlink_message_get_errno(m);
3188 if (r < 0)
3189 return r;
3190
3191 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3192 if (r < 0 && r != -ENODATA)
3193 return r;
3194
3195 strv_free_and_replace(link->alternative_names, s);
3196 }
3197
c643bda5
YW		 3198 r = network_get(link->manager, link->iftype, link->sd_device,
3199 link->ifname, link->alternative_names, link->driver,
3200 &link->mac, &link->permanent_mac,
3201 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3202 if (r == -ENOENT) {
3203 link_enter_unmanaged(link);
3204 return 0;
3205 } else if (r == 0 && network->unmanaged) {
3206 link_enter_unmanaged(link);
3207 return 0;
3208 } else if (r < 0)
3209 return r;
3210
99b8517c 3211 if (link->network == network && !force)
ad932b15
YW		 3212 return 0;
3213
3214 log_link_info(link, "Re-configuring with %s", network->filename);
3215
3216 /* Dropping old .network file */
3217 r = link_stop_clients(link, false);
572b21d9 3218 if (r < 0)
ad932b15 3219 return r;
ad932b15
YW		 3220
3221 if (link_dhcp4_server_enabled(link))
3222 (void) sd_dhcp_server_stop(link->dhcp_server);
3223
3224 r = link_drop_config(link);
3225 if (r < 0)
3226 return r;
3227
2c7b826d 3228 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3229 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3230 r = link_drop_foreign_config(link);
3231 if (r < 0)
3232 return r;
3233 }
3234
3235 link_free_carrier_maps(link);
3236 link_free_engines(link);
3237 link->network = network_unref(link->network);
3238
3239 /* Then, apply new .network file */
3240 r = network_apply(network, link);
3241 if (r < 0)
3242 return r;
3243
3244 r = link_new_carrier_maps(link);
3245 if (r < 0)
3246 return r;
3247
3248 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3249 link_dirty(link);
ad932b15
YW		 3250
3251 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3252 * link_configure() is called later asynchronously. */
3253 r = link_configure_duid(link);
3254 if (r <= 0)
3255 return r;
3256
3257 r = link_configure(link);
3258 if (r < 0)
3259 return r;
3260
3261 return 0;
3262}
3263
572b21d9
YW		 3264static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3265 int r;
3266
3267 r = link_reconfigure_internal(link, m, false);
3268 if (r < 0)
3269 link_enter_failed(link);
3270
3271 return 1;
3272}
3273
3274static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3275 int r;
3276
3277 r = link_reconfigure_internal(link, m, true);
3278 if (r < 0)
3279 link_enter_failed(link);
3280
3281 return 1;
3282}
3283
3284int link_reconfigure(Link *link, bool force) {
3285 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3286 int r;
3287
2c0d7ed3
YW		 3288 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3289 return 0;
3290
572b21d9
YW		 3291 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3292 link->ifindex);
3293 if (r < 0)
3294 return r;
3295
3296 r = netlink_call_async(link->manager->rtnl, NULL, req,
3297 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3298 link_netlink_destroy_callback, link);
3299 if (r < 0)
3300 return r;
3301
3302 link_ref(link);
3303
3304 return 0;
3305}
3306
e6bf7774 3307static int link_initialized_and_synced(Link *link) {
505f8da7 3308 Network *network;
505f8da7
TG		 3309 int r;
3310
3311 assert(link);
3312 assert(link->ifname);
3313 assert(link->manager);
3314
bd08ce56
YW		 3315 /* We may get called either from the asynchronous netlink callback,
3316 * or directly for link_add() if running in a container. See link_add(). */
3317 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3318 return 0;
505f8da7 3319
6a7a4e4d 3320 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3321 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3322
0d4ad91d
AR		 3323 r = link_new_bound_by_list(link);
3324 if (r < 0)
3325 return r;
3326
3327 r = link_handle_bound_by_list(link);
3328 if (r < 0)
3329 return r;
3330
c4a03a56 3331 if (!link->network) {
0894cfe4 3332 r = wifi_get_info(link);
8d968fdd
YW		 3333 if (r < 0)
3334 return r;
3335
c643bda5
YW		 3336 r = network_get(link->manager, link->iftype, link->sd_device,
3337 link->ifname, link->alternative_names, link->driver,
3338 &link->mac, &link->permanent_mac,
3339 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3340 if (r == -ENOENT) {
3341 link_enter_unmanaged(link);
4232cf04 3342 return 0;
a09dc546
DM		 3343 } else if (r == 0 && network->unmanaged) {
3344 link_enter_unmanaged(link);
3345 return 0;
c4a03a56
TG		 3346 } else if (r < 0)
3347 return r;
505f8da7 3348
c4a03a56
TG		 3349 if (link->flags & IFF_LOOPBACK) {
3350 if (network->link_local != ADDRESS_FAMILY_NO)
3351 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3352
c4a03a56
TG		 3353 if (network->dhcp != ADDRESS_FAMILY_NO)
3354 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3355
c4a03a56
TG		 3356 if (network->dhcp_server)
3357 log_link_debug(link, "Ignoring DHCP server for loopback link");
3358 }
bd2efe92 3359
7d342c03 3360 r = network_apply(network, link);
c4a03a56
TG		 3361 if (r < 0)
3362 return r;
3363 }
505f8da7 3364
0d4ad91d
AR		 3365 r = link_new_bound_to_list(link);
3366 if (r < 0)
3367 return r;
3368
27dfc982
YW		 3369 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3370 * link_configure() is called later asynchronously. */
3371 r = link_configure_duid(link);
3372 if (r <= 0)
3373 return r;
3374
a748b692
TG		 3375 r = link_configure(link);
3376 if (r < 0)
3377 return r;
3378
4232cf04 3379 return 0;
505f8da7
TG		 3380}
3381
302a796f 3382static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3383 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3384 int r;
3385
572b21d9
YW		 3386 r = sd_netlink_message_get_errno(m);
3387 if (r < 0) {
40681e5c 3388 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3389 link_enter_failed(link);
3390 return 0;
3391 }
3392
3393 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3394 if (r < 0 && r != -ENODATA) {
3395 link_enter_failed(link);
3396 return 0;
3397 }
3398
3399 strv_free_and_replace(link->alternative_names, s);
3400
4ff296b0
YW		 3401 r = link_initialized_and_synced(link);
3402 if (r < 0)
3403 link_enter_failed(link);
e6bf7774
YW		 3404 return 1;
3405}
3406
51517f9e 3407int link_initialized(Link *link, sd_device *device) {
4afd3348 3408 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3409 int r;
3410
3411 assert(link);
3412 assert(link->manager);
3413 assert(link->manager->rtnl);
3414 assert(device);
3415
8434fd5c 3416 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3417 return 0;
3418
51517f9e 3419 if (link->sd_device)
679b3605
TG		 3420 return 0;
3421
79008bdd 3422 log_link_debug(link, "udev initialized link");
bd08ce56 3423 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3424
51517f9e 3425 link->sd_device = sd_device_ref(device);
4f561e8e 3426
3c9b8860
TG		 3427 /* udev has initialized the link, but we don't know if we have yet
3428 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3429 * when it returns we know that the pending NEWLINKs have already been
3430 * processed and that we are up-to-date */
4f561e8e 3431
3c9b8860
TG		 3432 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3433 link->ifindex);
4f561e8e
TG		 3434 if (r < 0)
3435 return r;
3436
302a796f
YW		 3437 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3438 link_netlink_destroy_callback, link);
4f561e8e
TG		 3439 if (r < 0)
3440 return r;
3441
5da8149f
TG		 3442 link_ref(link);
3443
4f561e8e
TG		 3444 return 0;
3445}
3446
c4a03a56 3447static int link_load(Link *link) {
0bc70f1d
TG		 3448 _cleanup_free_ char *network_file = NULL,
3449 *addresses = NULL,
f703cc2c 3450 *routes = NULL,
0bc70f1d
TG		 3451 *dhcp4_address = NULL,
3452 *ipv4ll_address = NULL;
3453 union in_addr_union address;
c4a03a56
TG		 3454 int r;
3455
3456 assert(link);
3457
aa8fbc74 3458 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3459 "NETWORK_FILE", &network_file,
3460 "ADDRESSES", &addresses,
f703cc2c 3461 "ROUTES", &routes,
0bc70f1d 3462 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3463 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3464 if (r < 0 && r != -ENOENT)
3465 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3466
3467 if (network_file) {
3468 Network *network;
3469 char *suffix;
3470
3471 /* drop suffix */
3472 suffix = strrchr(network_file, '.');
3473 if (!suffix) {
3474 log_link_debug(link, "Failed to get network name from %s", network_file);
3475 goto network_file_fail;
3476 }
3477 *suffix = '\0';
3478
3479 r = network_get_by_name(link->manager, basename(network_file), &network);
3480 if (r < 0) {
3481 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3482 goto network_file_fail;
3483 }
3484
7d342c03 3485 r = network_apply(network, link);
c4a03a56
TG		 3486 if (r < 0)
3487 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3488 }
3489
3490network_file_fail:
3491
1f68f772
ZJS		 3492 for (const char *p = addresses; p; ) {
3493 _cleanup_free_ char *address_str = NULL;
3494 char *prefixlen_str;
3495 int family;
3496 unsigned char prefixlen;
c4a03a56 3497
1f68f772
ZJS		 3498 r = extract_first_word(&p, &address_str, NULL, 0);
3499 if (r < 0)
3500 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3501 if (r <= 0)
3502 break;
c4a03a56 3503
1f68f772
ZJS		 3504 prefixlen_str = strchr(address_str, '/');
3505 if (!prefixlen_str) {
3506 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3507 continue;
3508 }
3509 *prefixlen_str++ = '\0';
c4a03a56 3510
1f68f772
ZJS		 3511 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3512 if (r != 1) {
3513 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3514 continue;
3515 }
c4a03a56 3516
1f68f772
ZJS		 3517 r = in_addr_from_string_auto(address_str, &family, &address);
3518 if (r < 0) {
3519 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3520 continue;
c4a03a56 3521 }
c4a03a56 3522
1f68f772
ZJS		 3523 r = address_add(link, family, &address, prefixlen, NULL);
3524 if (r < 0)
3525 return log_link_error_errno(link, r, "Failed to add address: %m");
3526 }
74544b4e 3527
1f68f772
ZJS		 3528 for (const char *p = routes; p; ) {
3529 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3530 _cleanup_(route_freep) Route *tmp = NULL;
3531 _cleanup_free_ char *route_str = NULL;
3532 char *prefixlen_str;
3533 Route *route;
f703cc2c 3534
1f68f772
ZJS		 3535 r = extract_first_word(&p, &route_str, NULL, 0);
3536 if (r < 0)
3537 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3538 if (r <= 0)
3539 break;
c598ac76 3540
1f68f772
ZJS		 3541 prefixlen_str = strchr(route_str, '/');
3542 if (!prefixlen_str) {
3543 log_link_debug(link, "Failed to parse route %s", route_str);
3544 continue;
3545 }
3546 *prefixlen_str++ = '\0';
f703cc2c 3547
1f68f772
ZJS		 3548 r = route_new(&tmp);
3549 if (r < 0)
3550 return log_oom();
f703cc2c 3551
1f68f772
ZJS		 3552 r = sscanf(prefixlen_str,
3553 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3554 &tmp->dst_prefixlen,
3555 &tmp->tos,
3556 &tmp->priority,
3557 &tmp->table,
3558 &tmp->lifetime);
3559 if (r != 5) {
3560 log_link_debug(link,
3561 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3562 prefixlen_str);
3563 continue;
3564 }
f1368755 3565
1f68f772
ZJS		 3566 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3567 if (r < 0) {
3568 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3569 continue;
3570 }
f703cc2c 3571
1f68f772
ZJS		 3572 r = route_add(link, tmp, &route);
3573 if (r < 0)
3574 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3575
1f68f772
ZJS		 3576 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3577 r = sd_event_add_time(link->manager->event, &expire,
3578 clock_boottime_or_monotonic(),
3579 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3580 if (r < 0)
1f68f772 3581 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3582 }
1f68f772
ZJS		 3583
3584 sd_event_source_unref(route->expire);
3585 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3586 }
3587
0bc70f1d
TG		 3588 if (dhcp4_address) {
3589 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3590 if (r < 0) {
b68d26b8 3591 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3592 goto dhcp4_address_fail;
3593 }
3594
b1c626f6 3595 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3596 if (r < 0)
b68d26b8 3597 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3598
1b43e246
DS		 3599 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3600 if (r < 0)
3601 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3602
0bc70f1d
TG		 3603 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3604 if (r < 0)
b68d26b8 3605 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3606 }
3607
3608dhcp4_address_fail:
3609
3610 if (ipv4ll_address) {
3611 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3612 if (r < 0) {
b68d26b8 3613 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3614 goto ipv4ll_address_fail;
3615 }
3616
3617 r = sd_ipv4ll_new(&link->ipv4ll);
3618 if (r < 0)
b68d26b8 3619 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3620
1b43e246
DS		 3621 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3622 if (r < 0)
3623 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3624
0bc70f1d
TG		 3625 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3626 if (r < 0)
b68d26b8 3627 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3628 }
3629
3630ipv4ll_address_fail:
3631
c4a03a56
TG		 3632 return 0;
3633}
3634
1c4baffc 3635int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3636 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3637 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3638 Link *link;
5a937ea2 3639 int r;
505f8da7
TG		 3640
3641 assert(m);
fbbeb65a 3642 assert(m->rtnl);
505f8da7
TG		 3643 assert(message);
3644 assert(ret);
3645
3646 r = link_new(m, message, ret);
3647 if (r < 0)
3648 return r;
3649
3650 link = *ret;
3651
6a7a4e4d 3652 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3653
c4a03a56
TG		 3654 r = link_load(link);
3655 if (r < 0)
3656 return r;
3657
bf331d87
YW		 3658 if (path_is_read_only_fs("/sys") <= 0) {
3659 /* udev should be around */
ae06ab10 3660 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3661 r = sd_device_new_from_device_id(&device, ifindex_str);
3662 if (r < 0) {
4d59e14f
YW		 3663 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3664 return 0;
5c416fc4 3665 }
505f8da7 3666
5a937ea2 3667 r = sd_device_get_is_initialized(device);
51517f9e 3668 if (r < 0) {
bf331d87 3669 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3670 goto failed;
3671 }
5a937ea2 3672 if (r == 0) {
505f8da7 3673 /* not yet ready */
79008bdd 3674 log_link_debug(link, "link pending udev initialization...");
505f8da7 3675 return 0;
3c4cb064 3676 }
505f8da7 3677
299ad32d
YW		 3678 r = device_is_renaming(device);
3679 if (r < 0) {
bf331d87 3680 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3681 goto failed;
3682 }
3683 if (r > 0) {
bf331d87 3684 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3685 return 0;
3686 }
3687
4f561e8e
TG		 3688 r = link_initialized(link, device);
3689 if (r < 0)
5c416fc4 3690 goto failed;
4f561e8e 3691 } else {
e6bf7774 3692 r = link_initialized_and_synced(link);
4f561e8e 3693 if (r < 0)
5c416fc4 3694 goto failed;
4f561e8e 3695 }
505f8da7 3696
a748b692 3697 return 0;
5c416fc4
TG		 3698failed:
3699 link_enter_failed(link);
3700 return r;
a748b692
TG		 3701}
3702
c601ebf7 3703int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3704 int r;
3705
3706 assert(link);
3707
3708 log_link_info(link, "Gained IPv6LL");
3709
c601ebf7 3710 link->ipv6ll_address = *address;
e7ab854c
TG		 3711 link_check_ready(link);
3712
b9ea3d2e 3713 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3714 r = link_acquire_ipv6_conf(link);
3715 if (r < 0) {
3716 link_enter_failed(link);
3717 return r;
3718 }
3719 }
3720
3721 return 0;
3722}
3723
9c0a72f9
TG		 3724static int link_carrier_gained(Link *link) {
3725 int r;
3726
3727 assert(link);
3728
0894cfe4 3729 r = wifi_get_info(link);
8d968fdd
YW		 3730 if (r < 0)
3731 return r;
3732 if (r > 0) {
572b21d9
YW		 3733 r = link_reconfigure_internal(link, NULL, false);
3734 if (r < 0) {
3735 link_enter_failed(link);
8d968fdd 3736 return r;
572b21d9 3737 }
8d968fdd
YW		 3738 }
3739
b9ea3d2e 3740 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3741 r = link_acquire_conf(link);
3742 if (r < 0) {
3743 link_enter_failed(link);
3744 return r;
3745 }
6fc25497 3746
b425c3ae 3747 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3748 r = link_request_set_addresses(link);
6fc25497
SS		 3749 if (r < 0)
3750 return r;
9c0a72f9
TG		 3751 }
3752
0d4ad91d
AR		 3753 r = link_handle_bound_by_list(link);
3754 if (r < 0)
3755 return r;
3756
9c0a72f9
TG		 3757 return 0;
3758}
3759
3760static int link_carrier_lost(Link *link) {
3761 int r;
3762
3763 assert(link);
3764
25e992ba 3765 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3766 return 0;
3767
fbdb6605 3768 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3769 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3770 * configuration and stop the clients as well. */
97e7fb39
SS		 3771 if (link->setting_mtu)
3772 return 0;
3773
95355a28 3774 r = link_stop_clients(link, false);
9c0a72f9
TG		 3775 if (r < 0) {
3776 link_enter_failed(link);
3777 return r;
3778 }
3779
28464ae0
SS		 3780 if (link_dhcp4_server_enabled(link))
3781 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3782
3104883d
SS		 3783 r = link_drop_config(link);
3784 if (r < 0)
3785 return r;
3786
2c7b826d 3787 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3788 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3789 r = link_drop_foreign_config(link);
3790 if (r < 0)
3791 return r;
3792 }
3104883d 3793
0d4ad91d
AR		 3794 r = link_handle_bound_by_list(link);
3795 if (r < 0)
3796 return r;
3797
9c0a72f9
TG		 3798 return 0;
3799}
3800
3801int link_carrier_reset(Link *link) {
3802 int r;
3803
3804 assert(link);
3805
3806 if (link_has_carrier(link)) {
3807 r = link_carrier_lost(link);
3808 if (r < 0)
3809 return r;
3810
3811 r = link_carrier_gained(link);
3812 if (r < 0)
3813 return r;
3814
6a7a4e4d 3815 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3816 }
3817
3818 return 0;
3819}
3820
d236718c
DS		 3821/* This is called every time an interface admin state changes to up;
3822 * specifically, when IFF_UP flag changes from unset to set */
3823static int link_admin_state_up(Link *link) {
3824 int r;
3825
3826 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3827 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3828 * ipv6_mtu_set prevents this from trying to set it too early before
3829 * the link->network has been setup; we only need to reset it
3830 * here if we've already set it during normal initialization. */
3831 if (link->ipv6_mtu_set) {
3832 r = link_set_ipv6_mtu(link);
3833 if (r < 0)
3834 return r;
3835 }
3836
3837 return 0;
3838}
3839
1c4baffc 3840int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3841 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3842 struct ether_addr mac;
ca4e095a 3843 const char *ifname;
afe7fd56 3844 uint32_t mtu;
d236718c 3845 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3846 int old_master, r;
22936833 3847
dd3efc09 3848 assert(link);
b8941f74 3849 assert(link->ifname);
22936833
TG		 3850 assert(m);
3851
7619683b 3852 if (link->state == LINK_STATE_LINGER) {
5238e957 3853 log_link_info(link, "Link re-added");
289e6774 3854 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3855
3856 r = link_new_carrier_maps(link);
3857 if (r < 0)
3858 return r;
7619683b
TG		 3859 }
3860
1c4baffc 3861 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3862 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3863 Manager *manager = link->manager;
b8941f74 3864
30de2b89 3865 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3866
30de2b89
YW		 3867 link_drop(link);
3868 r = link_add(manager, m, &link);
3869 if (r < 0)
3870 return r;
b8941f74
TG		 3871 }
3872
572b21d9
YW		 3873 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3874 if (r >= 0)
3875 strv_free_and_replace(link->alternative_names, s);
3876
1c4baffc 3877 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3878 if (r >= 0 && mtu > 0) {
3879 link->mtu = mtu;
4e964aa0 3880 if (link->original_mtu == 0) {
afe7fd56 3881 link->original_mtu = mtu;
6a7a4e4d 3882 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3883 }
3884
3885 if (link->dhcp_client) {
3c9b8860
TG		 3886 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3887 link->mtu);
fc95c359
YW		 3888 if (r < 0)
3889 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3890 }
7465dd22
PF		 3891
3892 if (link->radv) {
3893 r = sd_radv_set_mtu(link->radv, link->mtu);
3894 if (r < 0)
3895 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3896 }
9842de0d 3897 }
69629de9 3898
e9189a1f
TG		 3899 /* The kernel may broadcast NEWLINK messages without the MAC address
3900 set, simply ignore them. */
1c4baffc 3901 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3902 if (r >= 0) {
3c9b8860
TG		 3903 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3904 ETH_ALEN)) {
c49b33ac 3905
3c9b8860
TG		 3906 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3907 ETH_ALEN);
c49b33ac 3908
79008bdd 3909 log_link_debug(link, "MAC address: "
20861203
TG		 3910 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3911 mac.ether_addr_octet[0],
3912 mac.ether_addr_octet[1],
3913 mac.ether_addr_octet[2],
3914 mac.ether_addr_octet[3],
3915 mac.ether_addr_octet[4],
3916 mac.ether_addr_octet[5]);
c49b33ac 3917
20861203
TG		 3918 if (link->ipv4ll) {
3919 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3920 if (r < 0)
3921 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3922 }
c49b33ac 3923
20861203 3924 if (link->dhcp_client) {
3c9b8860 3925 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3926 (const uint8_t *) &link->mac,
3927 sizeof (link->mac),
3928 ARPHRD_ETHER);
6a7a4e4d
LP		 3929 if (r < 0)
3930 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3931
fff1f40c
YW		 3932 r = dhcp4_set_client_identifier(link);
3933 if (r < 0)
3934 return r;
c49b33ac 3935 }
4138fb2c
PF		 3936
3937 if (link->dhcp6_client) {
f24648a6 3938 const DUID* duid = link_get_duid(link);
8341a5c3 3939
4138fb2c 3940 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3941 (const uint8_t *) &link->mac,
3942 sizeof (link->mac),
3943 ARPHRD_ETHER);
6a7a4e4d
LP		 3944 if (r < 0)
3945 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3946
8217ed5e
TH		 3947 if (link->network->iaid_set) {
3948 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3949 link->network->iaid);
3950 if (r < 0)
3951 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3952 }
413708d1 3953
8341a5c3
ZJS		 3954 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3955 duid->type,
3956 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3957 duid->raw_data_len);
413708d1
VK		 3958 if (r < 0)
3959 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3960 }
7465dd22
PF		 3961
3962 if (link->radv) {
3963 r = sd_radv_set_mac(link->radv, &link->mac);
3964 if (r < 0)
3965 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3966 }
420d2058
SS		 3967
3968 if (link->ndisc) {
3969 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3970 if (r < 0)
3971 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3972 }
c49b33ac 3973 }
4f882b2a
TG		 3974 }
3975
bb262ef0
YW		 3976 old_master = link->master_ifindex;
3977 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3978
d236718c 3979 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3980 had_carrier = link_has_carrier(link);
3981
bb262ef0 3982 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3983 if (r < 0)
3984 return r;
3985
d236718c
DS		 3986 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3987 log_link_info(link, "Link UP");
3988
3989 r = link_admin_state_up(link);
3990 if (r < 0)
3991 return r;
3992 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3993 log_link_info(link, "Link DOWN");
3994
273eec24
LP		 3995 r = link_update_lldp(link);
3996 if (r < 0)
3997 return r;
3998
a61bb41c
TG		 3999 carrier_gained = !had_carrier && link_has_carrier(link);
4000 carrier_lost = had_carrier && !link_has_carrier(link);
4001
4002 if (carrier_gained) {
6a7a4e4d 4003 log_link_info(link, "Gained carrier");
a61bb41c 4004
9c0a72f9
TG		 4005 r = link_carrier_gained(link);
4006 if (r < 0)
4007 return r;
a61bb41c 4008 } else if (carrier_lost) {
6a7a4e4d 4009 log_link_info(link, "Lost carrier");
a61bb41c 4010
9c0a72f9
TG		 4011 r = link_carrier_lost(link);
4012 if (r < 0)
a61bb41c 4013 return r;
a61bb41c
TG		 4014 }
4015
4016 return 0;
dd3efc09 4017}
fe8db0c5 4018
b295beea
LP		 4019static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4020 bool space = false;
4021 Iterator i;
4022 Link *link;
4023
4024 assert(f);
4025 assert(prefix);
4026
4027 if (hashmap_isempty(h))
4028 return;
4029
0d536673 4030 fputs(prefix, f);
b295beea
LP		 4031 HASHMAP_FOREACH(link, h, i) {
4032 if (space)
0d536673 4033 fputc(' ', f);
b295beea
LP		 4034
4035 fprintf(f, "%i", link->ifindex);
4036 space = true;
4037 }
4038
0d536673 4039 fputc('\n', f);
b295beea
LP		 4040}
4041
15761549 4042static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
dddc8d1e 4043 for (unsigned j = 0; j < n_dns; j++) {
15761549 4044 _cleanup_free_ char *b = NULL;
dddc8d1e 4045 int r;
15761549
YW		 4046
4047 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
4048 if (r < 0) {
4049 log_debug_errno(r, "Failed to format address, ignoring: %m");
4050 continue;
4051 }
4052
4053 if (*space)
4054 fputc(' ', f);
4055 fputs(b, f);
4056 *space = true;
4057 }
4058}
4059
d5e172d2
ZJS		 4060static void serialize_addresses(
4061 FILE *f,
4062 const char *lvalue,
4063 bool *space,
4064 char **addresses,
4065 sd_dhcp_lease *lease,
4066 bool conditional,
ddb82ec2 4067 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4068 sd_dhcp6_lease *lease6,
4069 bool conditional6,
4070 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4071 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4072 int r;
4073
4074 bool _space = false;
4075 if (!space)
4076 space = &_space;
4077
4078 if (lvalue)
4079 fprintf(f, "%s=", lvalue);
4080 fputstrv(f, addresses, NULL, space);
4081
4082 if (lease && conditional) {
4083 const struct in_addr *lease_addresses;
4084
4085 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4086 if (r > 0)
d8bff5cc 4087 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4088 }
4089
4090 if (lease6 && conditional6 && lease6_get_addr) {
4091 const struct in6_addr *in6_addrs;
4092
4093 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4094 if (r > 0)
4095 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4096 }
4097
4098 if (lease6 && conditional6 && lease6_get_fqdn) {
4099 char **in6_hosts;
4100
4101 r = lease6_get_fqdn(lease6, &in6_hosts);
4102 if (r > 0)
4103 fputstrv(f, in6_hosts, NULL, space);
4104 }
4105
4106 if (lvalue)
4107 fputc('\n', f);
4108}
4109
fe8db0c5 4110int link_save(Link *link) {
d361b373 4111 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4112 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4113 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4114 Route *route;
18d8a2cf 4115 Address *a;
e7780c8d 4116 Iterator i;
fe8db0c5
TG		 4117 int r;
4118
4119 assert(link);
4120 assert(link->state_file);
68a8723c 4121 assert(link->lease_file);
bbf7c048
TG		 4122 assert(link->manager);
4123
370e9930 4124 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4125 (void) unlink(link->state_file);
370e9930
TG		 4126 return 0;
4127 }
4128
34437b4f
LP		 4129 link_lldp_save(link);
4130
deb2e523
TG		 4131 admin_state = link_state_to_string(link->state);
4132 assert(admin_state);
4133
e375dcde
TG		 4134 oper_state = link_operstate_to_string(link->operstate);
4135 assert(oper_state);
deb2e523 4136
ac999bf0
YW		 4137 carrier_state = link_carrier_state_to_string(link->carrier_state);
4138 assert(carrier_state);
4139
4140 address_state = link_address_state_to_string(link->address_state);
4141 assert(address_state);
4142
fe8db0c5
TG		 4143 r = fopen_temporary(link->state_file, &f, &temp_path);
4144 if (r < 0)
6a7a4e4d 4145 goto fail;
fe8db0c5 4146
5512a963 4147 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4148
4149 fprintf(f,
4150 "# This is private data. Do not parse.\n"
deb2e523 4151 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4152 "OPER_STATE=%s\n"
4153 "CARRIER_STATE=%s\n"
4154 "ADDRESS_STATE=%s\n",
4155 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4156
bcb7a07e 4157 if (link->network) {
fe0e16db
YW		 4158 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4159 const char *dhcp_domainname = NULL, *p;
07bdc70d 4160 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 4161 bool space;
07bdc70d 4162
c1a38904
MTL		 4163 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4164 yes_no(link->network->required_for_online));
4165
d5e172d2
ZJS		 4166 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4167 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4168 strempty(link_operstate_to_string(st.min)),
4169 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4170 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4171
07bdc70d 4172 if (link->dhcp6_client) {
4058d339
TG		 4173 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4174 if (r < 0 && r != -ENOMSG)
2206aa5c 4175 log_link_debug_errno(link, r, "Failed to get DHCPv6 lease: %m");
07bdc70d 4176 }
b0e39c82 4177
adc5b2e2
TG		 4178 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4179
d5e172d2
ZJS		 4180 /************************************************************/
4181
0d536673 4182 fputs("DNS=", f);
ea352b40 4183 space = false;
15761549
YW		 4184 if (link->n_dns != (unsigned) -1)
4185 link_save_dns(f, link->dns, link->n_dns, &space);
4186 else
4187 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 4188
d5e172d2
ZJS		 4189 serialize_addresses(f, NULL, &space,
4190 NULL,
4191 link->dhcp_lease,
4192 link->network->dhcp_use_dns,
ddb82ec2 4193 SD_DHCP_LEASE_DNS,
d5e172d2
ZJS		 4194 dhcp6_lease,
4195 link->network->dhcp6_use_dns,
4196 sd_dhcp6_lease_get_dns,
4197 NULL);
1e7a0e21
LP		 4198
4199 /* Make sure to flush out old entries before we use the NDISC data */
4200 ndisc_vacuum(link);
4201
b296797f 4202 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4203 NDiscRDNSS *dd;
4204
d8bff5cc
ZJS		 4205 SET_FOREACH(dd, link->ndisc_rdnss, i)
4206 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4207 }
4208
4209 fputc('\n', f);
4210
d5e172d2
ZJS		 4211 /************************************************************/
4212
4213 serialize_addresses(f, "NTP", NULL,
4214 link->ntp ?: link->network->ntp,
4215 link->dhcp_lease,
4216 link->network->dhcp_use_ntp,
ddb82ec2 4217 SD_DHCP_LEASE_NTP,
d5e172d2
ZJS		 4218 dhcp6_lease,
4219 link->network->dhcp6_use_ntp,
4220 sd_dhcp6_lease_get_ntp_addrs,
4221 sd_dhcp6_lease_get_ntp_fqdn);
4222
4223 serialize_addresses(f, "SIP", NULL,
2a71d57f 4224 NULL,
d5e172d2
ZJS		 4225 link->dhcp_lease,
4226 link->network->dhcp_use_sip,
ddb82ec2 4227 SD_DHCP_LEASE_SIP,
2a71d57f 4228 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4229
4230 /************************************************************/
bd8f6538 4231
b2a81c0b 4232 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4233 if (link->dhcp_lease) {
b2a81c0b 4234 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4235 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4236 }
b2a81c0b
LP		 4237 if (dhcp6_lease)
4238 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4239 }
4240
fe0e16db
YW		 4241 fputs("DOMAINS=", f);
4242 space = false;
15761549 4243 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 4244 fputs_with_space(f, p, NULL, &space);
07bdc70d 4245
1e7a0e21 4246 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4247 if (dhcp_domainname)
4248 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4249 if (dhcp_domains)
4250 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4251 if (dhcp6_domains)
4252 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4253 }
4254
4255 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4256 NDiscDNSSL *dd;
1e7a0e21
LP		 4257
4258 SET_FOREACH(dd, link->ndisc_dnssl, i)
4259 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4260 }
b2a81c0b 4261
0d536673 4262 fputc('\n', f);
6192b846 4263
d5e172d2
ZJS		 4264 /************************************************************/
4265
fe0e16db
YW		 4266 fputs("ROUTE_DOMAINS=", f);
4267 space = false;
15761549 4268 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 4269 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4270
1e7a0e21 4271 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4272 if (dhcp_domainname)
4273 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4274 if (dhcp_domains)
4275 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4276 if (dhcp6_domains)
4277 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4278 }
4279
4280 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4281 NDiscDNSSL *dd;
1e7a0e21
LP		 4282
4283 SET_FOREACH(dd, link->ndisc_dnssl, i)
4284 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4285 }
b2a81c0b 4286
0d536673 4287 fputc('\n', f);
67272d15 4288
d5e172d2
ZJS		 4289 /************************************************************/
4290
3c9b8860 4291 fprintf(f, "LLMNR=%s\n",
15761549 4292 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4293
4294 /************************************************************/
4295
aaa297d4 4296 fprintf(f, "MDNS=%s\n",
15761549 4297 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4298
d5e172d2
ZJS		 4299 /************************************************************/
4300
4301 int dns_default_route =
4302 link->dns_default_route >= 0 ? link->dns_default_route :
4303 link->network->dns_default_route;
4304 if (dns_default_route >= 0)
4305 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4306
4307 /************************************************************/
4308
4309 DnsOverTlsMode dns_over_tls_mode =
4310 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4311 link->network->dns_over_tls_mode;
4312 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4313 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4314
4315 /************************************************************/
4316
4317 DnssecMode dnssec_mode =
4318 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4319 link->network->dnssec_mode;
4320 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4321 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4322
4323 /************************************************************/
4324
4325 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4326 if (set_isempty(nta_anchors))
4327 nta_anchors = link->network->dnssec_negative_trust_anchors;
4328
4329 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4330 const char *n;
4331
0d536673 4332 fputs("DNSSEC_NTA=", f);
8a516214 4333 space = false;
d5e172d2 4334 SET_FOREACH(n, nta_anchors, i)
d390f8ef 4335 fputs_with_space(f, n, NULL, &space);
0d536673 4336 fputc('\n', f);
8a516214
LP		 4337 }
4338
d5e172d2
ZJS		 4339 /************************************************************/
4340
0d536673 4341 fputs("ADDRESSES=", f);
e7780c8d
TG		 4342 space = false;
4343 SET_FOREACH(a, link->addresses, i) {
4344 _cleanup_free_ char *address_str = NULL;
4345
4346 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4347 if (r < 0)
4348 goto fail;
4349
e7780c8d
TG		 4350 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4351 space = true;
4352 }
0d536673 4353 fputc('\n', f);
c1eb9872 4354
d5e172d2
ZJS		 4355 /************************************************************/
4356
0d536673 4357 fputs("ROUTES=", f);
c1eb9872
TG		 4358 space = false;
4359 SET_FOREACH(route, link->routes, i) {
4360 _cleanup_free_ char *route_str = NULL;
4361
4362 r = in_addr_to_string(route->family, &route->dst, &route_str);
4363 if (r < 0)
4364 goto fail;
4365
ecc3f340
ZJS		 4366 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4367 space ? " " : "", route_str,
f833694d 4368 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4369 space = true;
4370 }
4371
0d536673 4372 fputc('\n', f);
bcb7a07e 4373 }
7374f9d8 4374
b295beea
LP		 4375 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4376 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4377
8eb9058d 4378 if (link->dhcp_lease) {
bd91b83e 4379 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4380 if (r < 0)
c2d6bd61 4381 goto fail;
fe8db0c5 4382
7374f9d8 4383 fprintf(f,
b0e39c82
TG		 4384 "DHCP_LEASE=%s\n",
4385 link->lease_file);
deb2e523 4386 } else
6990fb6b 4387 (void) unlink(link->lease_file);
fe8db0c5 4388
0bc70f1d
TG		 4389 if (link->ipv4ll) {
4390 struct in_addr address;
4391
4392 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4393 if (r >= 0) {
0d536673 4394 fputs("IPV4LL_ADDRESS=", f);
072320ea 4395 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4396 fputc('\n', f);
0bc70f1d
TG		 4397 }
4398 }
4399
7e738e7b
SS		 4400 if (link->dhcp6_client) {
4401 _cleanup_free_ char *duid = NULL;
4402 uint32_t iaid;
4403
4404 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4405 if (r >= 0)
4406 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4407
4408 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4409 if (r >= 0)
4410 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4411 }
18d8a2cf 4412
c2d6bd61
LP		 4413 r = fflush_and_check(f);
4414 if (r < 0)
4415 goto fail;
fe8db0c5 4416
c2d6bd61 4417 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4418 r = -errno;
c2d6bd61 4419 goto fail;
fe8db0c5
TG		 4420 }
4421
c2d6bd61 4422 return 0;
dacd6cee 4423
c2d6bd61 4424fail:
6a7a4e4d 4425 (void) unlink(link->state_file);
6a7a4e4d
LP		 4426 if (temp_path)
4427 (void) unlink(temp_path);
4428
dacd6cee 4429 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4430}
4431
84de38c5
TG		 4432/* The serialized state in /run is no longer up-to-date. */
4433void link_dirty(Link *link) {
4434 int r;
4435
4436 assert(link);
4437
0c241a37
SS		 4438 /* mark manager dirty as link is dirty */
4439 manager_dirty(link->manager);
4440
de7fef4b 4441 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4442 if (r <= 0)
de7fef4b 4443 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4444 return;
84de38c5
TG		 4445 link_ref(link);
4446}
4447
4448/* The serialized state in /run is up-to-date */
4449void link_clean(Link *link) {
4450 assert(link);
4451 assert(link->manager);
4452
1046bf9b 4453 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4454}
4455
fe8db0c5 4456static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4457 [LINK_STATE_PENDING] = "pending",
bd08ce56 4458 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4459 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4460 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4461 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4462 [LINK_STATE_FAILED] = "failed",
370e9930 4463 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4464};
4465
4466DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4467
4468int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4469 const char *err_msg = NULL;
4470
4471 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
ab119e63
YW		 4472 return log_link_full(link, level, err,
4473 "%s: %s%s%s%m",
4474 msg,
4475 strempty(err_msg),
4476 err_msg && !endswith(err_msg, ".") ? "." : "",
4477 err_msg ? " " : "");
5ecb131d 4478}
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