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[thirdparty/systemd.git] / src / network / networkd-link.c
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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",
b0486c73 149 "vti6", "nlmon", "xfrm", "bareudp"))
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;
14153d1b 368
84de38c5
TG		 369 assert(link);
370
371 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 372 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 373 else if (link_has_carrier(link)) {
1678fbb3
YW		 374 if (link_is_enslaved(link))
375 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 376 else
1678fbb3 377 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 378 } else if (link->flags & IFF_UP)
1678fbb3 379 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 380 else
1678fbb3 381 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 382
1678fbb3 383 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 384 Link *slave;
385
90e74a66 386 SET_FOREACH(slave, link->slaves) {
959f65d3 387 link_update_operstate(slave, false);
84de38c5 388
1678fbb3
YW		 389 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
390 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 391 }
959f65d3 392 }
84de38c5 393
90e74a66 394 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 395 if (!address_is_ready(address))
396 continue;
84de38c5 397
1678fbb3
YW		 398 if (address->scope < scope)
399 scope = address->scope;
400 }
84de38c5 401
1678fbb3 402 /* for operstate we also take foreign addresses into account */
90e74a66 403 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 404 if (!address_is_ready(address))
405 continue;
406
407 if (address->scope < scope)
408 scope = address->scope;
409 }
410
411 if (scope < RT_SCOPE_SITE)
412 /* universally accessible addresses found */
413 address_state = LINK_ADDRESS_STATE_ROUTABLE;
414 else if (scope < RT_SCOPE_HOST)
415 /* only link or site local addresses found */
416 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 417 else
1678fbb3
YW		 418 /* no useful addresses found */
419 address_state = LINK_ADDRESS_STATE_OFF;
420
421 /* Mapping of address and carrier state vs operational state
422 * carrier state
423 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
424 * ------------------------------------------------------------------------------
425 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
426 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
427 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
428 */
84de38c5 429
1678fbb3
YW		 430 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
431 operstate = (LinkOperationalState) carrier_state;
432 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
433 operstate = LINK_OPERSTATE_ROUTABLE;
434 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
435 operstate = LINK_OPERSTATE_DEGRADED;
436 else
14153d1b
YW		 437 operstate = LINK_OPERSTATE_ENSLAVED;
438
35c5a9ca
YW		 439 if (link->carrier_state != carrier_state) {
440 link->carrier_state = carrier_state;
441 changed = true;
442 if (strv_extend(&p, "CarrierState") < 0)
443 log_oom();
444 }
959f65d3 445
35c5a9ca
YW		 446 if (link->address_state != address_state) {
447 link->address_state = address_state;
448 changed = true;
449 if (strv_extend(&p, "AddressState") < 0)
450 log_oom();
959f65d3
YW		 451 }
452
84de38c5
TG		 453 if (link->operstate != operstate) {
454 link->operstate = operstate;
35c5a9ca
YW		 455 changed = true;
456 if (strv_extend(&p, "OperationalState") < 0)
457 log_oom();
84de38c5 458 }
959f65d3 459
35c5a9ca
YW		 460 if (p)
461 link_send_changed_strv(link, p);
462 if (changed)
463 link_dirty(link);
464
45e11abf
YW		 465 if (also_update_master && link->network) {
466 link_update_master_operstate(link, link->network->bond);
467 link_update_master_operstate(link, link->network->bridge);
959f65d3 468 }
84de38c5
TG		 469}
470
51d18171
TG		 471#define FLAG_STRING(string, flag, old, new) \
472 (((old ^ new) & flag) \
473 ? ((old & flag) ? (" -" string) : (" +" string)) \
474 : "")
475
bb262ef0 476static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 477 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
478 uint8_t operstate;
479 int r;
480
481 assert(link);
482
483 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 484 if (r < 0)
485 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 486
1c4baffc 487 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 488 if (r < 0)
489 /* if we got a message without operstate, take it to mean
490 the state was unchanged */
491 operstate = link->kernel_operstate;
492
bb262ef0 493 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 494 return 0;
495
496 if (link->flags != flags) {
6a7a4e4d 497 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		 498 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
499 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
500 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
501 FLAG_STRING("UP", IFF_UP, link->flags, flags),
502 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
503 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
504 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
505 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
506 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
507 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
508 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
509 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
510 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
511 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
512 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
513 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
514 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
515 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
516 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
517
518 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
519 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
520 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
521 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
522 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
523 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
524 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
525 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
526
527 /* link flags are currently at most 18 bits, let's align to
528 * printing 20 */
529 if (unknown_flags_added)
79008bdd 530 log_link_debug(link,
6a7a4e4d 531 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 532 unknown_flags_added);
533
534 if (unknown_flags_removed)
79008bdd 535 log_link_debug(link,
6a7a4e4d 536 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 537 unknown_flags_removed);
538 }
539
540 link->flags = flags;
541 link->kernel_operstate = operstate;
542
959f65d3 543 link_update_operstate(link, true);
51d18171
TG		 544
545 return 0;
546}
547
1c4baffc 548static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 549 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 550 const char *ifname, *kind = NULL;
b710e6b6 551 unsigned short iftype;
572b21d9
YW		 552 int r, ifindex;
553 uint16_t type;
f579559b 554
0c2f9b84 555 assert(manager);
505f8da7 556 assert(message);
f579559b
TG		 557 assert(ret);
558
6cad256d
TJ		 559 /* check for link kind */
560 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
561 if (r == 0) {
db2f8a2e 562 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 563 r = sd_netlink_message_exit_container(message);
564 if (r < 0)
565 return r;
566 }
567
1c4baffc 568 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 569 if (r < 0)
570 return r;
571 else if (type != RTM_NEWLINK)
572 return -EINVAL;
573
574 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
575 if (r < 0)
576 return r;
577 else if (ifindex <= 0)
578 return -EINVAL;
579
b710e6b6
LP		 580 r = sd_rtnl_message_link_get_type(message, &iftype);
581 if (r < 0)
582 return r;
583
1c4baffc 584 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 585 if (r < 0)
586 return r;
587
17f9c355 588 link = new(Link, 1);
f579559b
TG		 589 if (!link)
590 return -ENOMEM;
591
17f9c355
YW		 592 *link = (Link) {
593 .n_ref = 1,
594 .manager = manager,
595 .state = LINK_STATE_PENDING,
17f9c355
YW		 596 .ifindex = ifindex,
597 .iftype = iftype,
15761549
YW		 598
599 .n_dns = (unsigned) -1,
600 .dns_default_route = -1,
601 .llmnr = _RESOLVE_SUPPORT_INVALID,
602 .mdns = _RESOLVE_SUPPORT_INVALID,
603 .dnssec_mode = _DNSSEC_MODE_INVALID,
604 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 605 };
606
505f8da7
TG		 607 link->ifname = strdup(ifname);
608 if (!link->ifname)
609 return -ENOMEM;
f579559b 610
6cad256d
TJ		 611 if (kind) {
612 link->kind = strdup(kind);
613 if (!link->kind)
614 return -ENOMEM;
615 }
616
cbff7170
TJ		 617 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
618 if (r < 0)
619 log_link_debug_errno(link, r, "New device has no master, continuing without");
620
1c4baffc 621 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 622 if (r < 0)
34437b4f 623 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 624
c643bda5 625 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 626 if (r < 0)
627 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
628
c643bda5
YW		 629 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
630 if (r < 0)
631 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
632
572b21d9
YW		 633 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
634 if (r < 0 && r != -ENODATA)
635 return r;
636
34437b4f 637 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 638 return -ENOMEM;
fe8db0c5 639
34437b4f 640 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 641 return -ENOMEM;
642
34437b4f 643 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 644 return -ENOMEM;
645
d5099efc 646 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 647 if (r < 0)
648 return r;
649
650 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 651 if (r < 0)
652 return r;
653
bb262ef0 654 r = link_update_flags(link, message, false);
51d18171
TG		 655 if (r < 0)
656 return r;
657
1cc6c93a 658 *ret = TAKE_PTR(link);
f579559b
TG		 659
660 return 0;
661}
662
15761549
YW		 663void link_ntp_settings_clear(Link *link) {
664 link->ntp = strv_free(link->ntp);
665}
666
667void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 668 if (link->n_dns != (unsigned) -1)
669 for (unsigned i = 0; i < link->n_dns; i++)
670 in_addr_full_free(link->dns[i]);
15761549
YW		 671 link->dns = mfree(link->dns);
672 link->n_dns = (unsigned) -1;
673
674 link->search_domains = ordered_set_free_free(link->search_domains);
675 link->route_domains = ordered_set_free_free(link->route_domains);
676
677 link->dns_default_route = -1;
678 link->llmnr = _RESOLVE_SUPPORT_INVALID;
679 link->mdns = _RESOLVE_SUPPORT_INVALID;
680 link->dnssec_mode = _DNSSEC_MODE_INVALID;
681 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
682
683 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
684}
685
1a6bb31f
YW		 686static void link_free_engines(Link *link) {
687 if (!link)
688 return;
689
690 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
691 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
692 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 693
694 link->lldp = sd_lldp_unref(link->lldp);
695
696 ndisc_flush(link);
697
698 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
699 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 700 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 701 link->ndisc = sd_ndisc_unref(link->ndisc);
702 link->radv = sd_radv_unref(link->radv);
703}
704
8301aa0b 705static Link *link_free(Link *link) {
428fd0a7
TG		 706 Address *address;
707
8301aa0b 708 assert(link);
f579559b 709
15761549
YW		 710 link_ntp_settings_clear(link);
711 link_dns_settings_clear(link);
712
8eec0b9d
YW		 713 link->routes = set_free(link->routes);
714 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 715 link->dhcp_routes = set_free(link->dhcp_routes);
716 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 717 link->dhcp6_routes = set_free(link->dhcp6_routes);
718 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
719 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
720 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 721 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 722
8eec0b9d
YW		 723 link->nexthops = set_free(link->nexthops);
724 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 725
8eec0b9d
YW		 726 link->neighbors = set_free(link->neighbors);
727 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 728
8eec0b9d
YW		 729 link->addresses = set_free(link->addresses);
730 link->addresses_foreign = set_free(link->addresses_foreign);
e5526518 731 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 732 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
733 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
734 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
735 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 736 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 737
11bf3cce
LP		 738 while ((address = link->pool_addresses)) {
739 LIST_REMOVE(addresses, link->pool_addresses, address);
740 address_free(address);
741 }
742
7272b25e 743 link_lldp_emit_stop(link);
1a6bb31f 744 link_free_engines(link);
68a8723c 745 free(link->lease_file);
49699bac
SS		 746 free(link->lldp_file);
747
c166a070 748 free(link->ifname);
572b21d9 749 strv_free(link->alternative_names);
ceac4078 750 free(link->kind);
8d968fdd 751 free(link->ssid);
c643bda5 752 free(link->driver);
6cad256d 753
db2f8a2e 754 (void) unlink(link->state_file);
fe8db0c5 755 free(link->state_file);
c166a070 756
51517f9e 757 sd_device_unref(link->sd_device);
b5db00e5 758
0d4ad91d 759 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 760 hashmap_free(link->bound_by_links);
761
5f707e12 762 set_free_with_destructor(link->slaves, link_unref);
033295c1 763
c9c908a6
YW		 764 network_unref(link->network);
765
8301aa0b 766 return mfree(link);
14b746f7
TG		 767}
768
8301aa0b 769DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 770
11a7f229
TG		 771int link_get(Manager *m, int ifindex, Link **ret) {
772 Link *link;
11a7f229
TG		 773
774 assert(m);
e856ed00 775 assert(ifindex > 0);
11a7f229
TG		 776 assert(ret);
777
ae06ab10 778 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 779 if (!link)
780 return -ENODEV;
781
782 *ret = link;
783
784 return 0;
785}
786
af9ba57a 787void link_set_state(Link *link, LinkState state) {
e331e246
TG		 788 assert(link);
789
790 if (link->state == state)
791 return;
792
0beb9542
YW		 793 log_link_debug(link, "State changed: %s -> %s",
794 link_state_to_string(link->state),
795 link_state_to_string(state));
796
e331e246
TG		 797 link->state = state;
798
799 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 800}
801
57bd6899
TG		 802static void link_enter_unmanaged(Link *link) {
803 assert(link);
804
e331e246 805 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 806
84de38c5 807 link_dirty(link);
57bd6899
TG		 808}
809
95355a28 810int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 811 int r = 0, k;
051e77ca 812 Address *ad;
111bb8f9
TG		 813
814 assert(link);
815 assert(link->manager);
816 assert(link->manager->event);
817
80060352
ZJS		 818 bool keep_dhcp = may_keep_dhcp &&
819 link->network &&
820 (link->manager->restarting ||
821 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
822
823 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 824 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 825 if (k < 0)
36c7d709 826 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 827 }
828
ba179154 829 if (link->ipv4ll) {
111bb8f9 830 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 831 if (k < 0)
36c7d709 832 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 833 }
834
051e77ca
SS		 835 if (link->network)
836 LIST_FOREACH(addresses, ad, link->network->static_addresses)
837 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
838 k = sd_ipv4acd_stop(ad->acd);
839 if (k < 0)
840 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
841 }
842
f5a8c43f
TG		 843 if (link->dhcp6_client) {
844 k = sd_dhcp6_client_stop(link->dhcp6_client);
845 if (k < 0)
36c7d709 846 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 847 }
4138fb2c 848
1633c457
YW		 849 if (link_dhcp6_pd_is_enabled(link)) {
850 k = dhcp6_pd_remove(link);
851 if (k < 0)
852 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
853 }
854
1e7a0e21
LP		 855 if (link->ndisc) {
856 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 857 if (k < 0)
36c7d709 858 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 859 }
860
7465dd22 861 if (link->radv) {
290696e5 862 k = sd_radv_stop(link->radv);
7465dd22
PF		 863 if (k < 0)
864 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
865 }
866
7272b25e 867 link_lldp_emit_stop(link);
111bb8f9
TG		 868 return r;
869}
870
b22d8a00 871void link_enter_failed(Link *link) {
ef1ba606 872 assert(link);
f882c247 873
370e9930 874 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 875 return;
876
6a7a4e4d 877 log_link_warning(link, "Failed");
449f7554 878
e331e246 879 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 880
95355a28 881 link_stop_clients(link, false);
111bb8f9 882
84de38c5 883 link_dirty(link);
f882c247
TG		 884}
885
7033af49
YW		 886static int link_join_netdevs_after_configured(Link *link) {
887 NetDev *netdev;
7033af49
YW		 888 int r;
889
90e74a66 890 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 891 if (netdev->ifindex > 0)
892 /* Assume already enslaved. */
893 continue;
894
895 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
896 continue;
897
898 log_struct(LOG_DEBUG,
899 LOG_LINK_INTERFACE(link),
900 LOG_NETDEV_INTERFACE(netdev),
901 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
902
903 r = netdev_join(netdev, link, NULL);
904 if (r < 0)
905 return log_struct_errno(LOG_WARNING, r,
906 LOG_LINK_INTERFACE(link),
907 LOG_NETDEV_INTERFACE(netdev),
908 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
909 }
910
911 return 0;
912}
913
e3a7b048 914static void link_enter_configured(Link *link) {
dd43110f
TG		 915 assert(link);
916 assert(link->network);
e3a7b048 917
289e6774 918 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 919 return;
dd43110f 920
e331e246 921 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 922
7033af49
YW		 923 (void) link_join_netdevs_after_configured(link);
924
84de38c5 925 link_dirty(link);
dd43110f
TG		 926}
927
302a796f 928static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 929 int r;
930
1046bf9b 931 assert(link);
7715629e 932 assert(link->route_messages > 0);
289e6774
WKI		 933 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
934 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 935
7715629e 936 link->route_messages--;
f882c247 937
77a008c0 938 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 939 return 1;
940
1c4baffc 941 r = sd_netlink_message_get_errno(m);
4ff296b0 942 if (r < 0 && r != -EEXIST) {
5ecb131d 943 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 944 link_enter_failed(link);
945 return 1;
946 }
f882c247 947
7715629e 948 if (link->route_messages == 0) {
6a7a4e4d 949 log_link_debug(link, "Routes set");
7715629e 950 link->static_routes_configured = true;
c133770a 951 link_set_nexthop(link);
dd3efc09 952 }
f882c247
TG		 953
954 return 1;
955}
956
b5799eeb 957int link_request_set_routes(Link *link) {
bf61b05a
LP		 958 enum {
959 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
960 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
961 _PHASE_MAX
962 } phase;
a6cc569e 963 Route *rt;
f882c247
TG		 964 int r;
965
966 assert(link);
967 assert(link->network);
289e6774 968 assert(link->state != _LINK_STATE_INVALID);
f882c247 969
2428613f 970 link->static_routes_configured = false;
27c34f73 971
e5526518
YW		 972 if (!link->addresses_ready)
973 return 0;
974
4e2ef9d9
YW		 975 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
976 /* During configuring addresses, the link lost its carrier. As networkd is dropping
977 * the addresses now, let's not configure the routes either. */
978 return 0;
979
c0ec4746 980 r = link_set_routing_policy_rules(link);
f3ef324d
YW		 981 if (r < 0)
982 return r;
f882c247 983
bf61b05a
LP		 984 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
985 for (phase = 0; phase < _PHASE_MAX; phase++)
986 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 987 if (rt->gateway_from_dhcp)
988 continue;
0d34228f 989
6ff5cc6b 990 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 991 continue;
a6cc569e 992
80b0e860 993 r = route_configure(rt, link, route_handler, NULL);
4ff296b0
YW		 994 if (r < 0)
995 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 996 if (r > 0)
997 link->route_messages++;
0d34228f 998 }
f5be5601 999
7715629e
ST		 1000 if (link->route_messages == 0) {
1001 link->static_routes_configured = true;
c133770a 1002 link_set_nexthop(link);
b425c3ae 1003 } else {
6a7a4e4d 1004 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1005 link_set_state(link, LINK_STATE_CONFIGURING);
1006 }
f882c247
TG		 1007
1008 return 0;
1009}
1010
6accfd31
DA		 1011void link_check_ready(Link *link) {
1012 Address *a;
6accfd31
DA		 1013
1014 assert(link);
1015
5f58af25
YW		 1016 if (link->state == LINK_STATE_CONFIGURED)
1017 return;
1018
1019 if (link->state != LINK_STATE_CONFIGURING) {
1020 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 1021 return;
39373cb9 1022 }
6accfd31
DA		 1023
1024 if (!link->network)
1025 return;
1026
39373cb9
YW		 1027 if (!link->addresses_configured) {
1028 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 1029 return;
39373cb9 1030 }
6accfd31 1031
39373cb9
YW		 1032 if (!link->neighbors_configured) {
1033 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 1034 return;
39373cb9 1035 }
6accfd31 1036
90e74a66 1037 SET_FOREACH(a, link->addresses)
39373cb9
YW		 1038 if (!address_is_ready(a)) {
1039 _cleanup_free_ char *str = NULL;
1040
1041 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1042 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 1043 return;
39373cb9 1044 }
6aa5773b 1045
39373cb9
YW		 1046 if (!link->static_routes_configured) {
1047 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 1048 return;
39373cb9 1049 }
6accfd31 1050
39373cb9
YW		 1051 if (!link->static_nexthops_configured) {
1052 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 1053 return;
39373cb9 1054 }
c16c7808 1055
39373cb9
YW		 1056 if (!link->routing_policy_rules_configured) {
1057 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 1058 return;
39373cb9 1059 }
6accfd31 1060
39373cb9
YW		 1061 if (!link->tc_configured) {
1062 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 1063 return;
39373cb9 1064 }
4ecdcb07 1065
39373cb9
YW		 1066 if (!link->sr_iov_configured) {
1067 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 1068 return;
39373cb9 1069 }
518cd6b5 1070
1f241589
YW		 1071 if (!link->bridge_mdb_configured) {
1072 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1073 return;
1074 }
1075
463797c1 1076 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 1077 bool has_ndisc_address = false;
1078 NDiscAddress *n;
6accfd31 1079
1c09d84e 1080 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 1081 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1082 return;
39373cb9 1083 }
6accfd31 1084
463797c1 1085 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1086 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1087 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1088 return;
39373cb9 1089 }
6accfd31 1090
90e74a66 1091 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 1092 if (!n->marked) {
1093 has_ndisc_address = true;
1094 break;
1095 }
1096
15797d6a 1097 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 1098 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 1099 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1100 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 1101 return;
1102 }
1103
1633c457 1104 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 1105 if (!link->dhcp4_configured &&
1106 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1107 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1108 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 1109 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 1110 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1111 * an IPv4ll fallback address must be configured. */
1112 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1113 return;
1114 }
1115
d98c546d 1116 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 1117 __func__,
1118 yes_no(link->dhcp4_configured),
1119 yes_no(link->dhcp6_address_configured),
1120 yes_no(link->dhcp6_route_configured),
1121 yes_no(link->dhcp6_pd_address_configured),
1122 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1123 yes_no(link->ndisc_addresses_configured),
1124 yes_no(link->ndisc_routes_configured));
39373cb9 1125 }
463797c1 1126 }
6accfd31 1127
5f58af25 1128 link_enter_configured(link);
6accfd31
DA		 1129
1130 return;
1131}
1132
e4a71bf3
WKI		 1133static int link_request_set_neighbors(Link *link) {
1134 Neighbor *neighbor;
1135 int r;
1136
1137 assert(link);
1138 assert(link->network);
1139 assert(link->state != _LINK_STATE_INVALID);
1140
2428613f 1141 link->neighbors_configured = false;
e4a71bf3
WKI		 1142
1143 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1144 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1145 if (r < 0)
1146 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1147 }
1148
1149 if (link->neighbor_messages == 0) {
1150 link->neighbors_configured = true;
1151 link_check_ready(link);
b425c3ae 1152 } else {
e4a71bf3 1153 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1154 link_set_state(link, LINK_STATE_CONFIGURING);
1155 }
e4a71bf3
WKI		 1156
1157 return 0;
1158}
1159
e5526518
YW		 1160static int link_set_bridge_fdb(Link *link) {
1161 FdbEntry *fdb_entry;
1162 int r;
1163
1164 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1165 r = fdb_entry_configure(link, fdb_entry);
1166 if (r < 0)
1167 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1168 }
1169
1170 return 0;
1171}
1172
1173static int static_address_ready_callback(Address *address) {
1174 Address *a;
e5526518
YW		 1175 Link *link;
1176
1177 assert(address);
1178 assert(address->link);
1179
1180 link = address->link;
1181
1182 if (!link->addresses_configured)
1183 return 0;
1184
90e74a66 1185 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1186 if (!address_is_ready(a)) {
1187 _cleanup_free_ char *str = NULL;
1188
1189 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1190 log_link_debug(link, "an address %s/%u is not ready", strnull(str), a->prefixlen);
1191 return 0;
1192 }
1193
1194 /* This should not be called again */
90e74a66 1195 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1196 a->callback = NULL;
1197
1198 link->addresses_ready = true;
1199
1200 return link_request_set_routes(link);
1201}
1202
3650173f 1203static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1204 int r;
1205
4958aee4 1206 assert(rtnl);
f5be5601
TG		 1207 assert(m);
1208 assert(link);
1209 assert(link->ifname);
7715629e 1210 assert(link->address_messages > 0);
289e6774 1211 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1212 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1213
7715629e 1214 link->address_messages--;
f882c247 1215
5da8149f 1216 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1217 return 1;
1218
1c4baffc 1219 r = sd_netlink_message_get_errno(m);
4ff296b0 1220 if (r < 0 && r != -EEXIST) {
5ecb131d 1221 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1222 link_enter_failed(link);
1223 return 1;
1224 } else if (r >= 0)
1225 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1226
7715629e 1227 if (link->address_messages == 0) {
e5526518
YW		 1228 Address *a;
1229
6a7a4e4d 1230 log_link_debug(link, "Addresses set");
c42ff3a1 1231 link->addresses_configured = true;
e5526518
YW		 1232
1233 /* When all static addresses are already ready, then static_address_ready_callback()
1234 * will not be called automatically. So, call it here. */
1235 a = set_first(link->static_addresses);
1236 if (!a) {
1237 log_link_warning(link, "No static address is stored.");
1238 link_enter_failed(link);
1239 return 1;
1240 }
1241 if (!a->callback) {
1242 log_link_warning(link, "Address ready callback is not set.");
1243 link_enter_failed(link);
1244 return 1;
1245 }
1246 r = a->callback(a);
1247 if (r < 0)
1248 link_enter_failed(link);
dd3efc09 1249 }
f882c247
TG		 1250
1251 return 1;
1252}
1253
e5526518
YW		 1254static int static_address_configure(Address *address, Link *link, bool update) {
1255 Address *ret;
197e2809 1256 int r;
f6bb7ac5 1257
e5526518
YW		 1258 assert(address);
1259 assert(link);
1260
1261 r = address_configure(address, link, address_handler, update, &ret);
1262 if (r < 0)
1263 return log_link_warning_errno(link, r, "Could not configure static address: %m");
1264
1265 link->address_messages++;
1266
1267 r = set_ensure_put(&link->static_addresses, &address_hash_ops, ret);
1268 if (r < 0)
1269 return log_link_warning_errno(link, r, "Failed to store static address: %m");
1270
1271 ret->callback = static_address_ready_callback;
f6bb7ac5 1272
197e2809 1273 return 0;
f6bb7ac5
TJ		 1274}
1275
289e6774 1276static int link_request_set_addresses(Link *link) {
95b74ef6 1277 AddressLabel *label;
a6cc569e 1278 Address *ad;
bd6379ec 1279 Prefix *p;
f882c247
TG		 1280 int r;
1281
1282 assert(link);
1283 assert(link->network);
f5be5601 1284 assert(link->state != _LINK_STATE_INVALID);
f882c247 1285
9b966cee
YW		 1286 if (link->address_remove_messages != 0) {
1287 log_link_debug(link, "Removing old addresses, new addresses will be configured later.");
1288 link->request_static_addresses = true;
1289 return 0;
1290 }
1291
2428613f 1292 /* Reset all *_configured flags we are configuring. */
9b966cee 1293 link->request_static_addresses = false;
2428613f 1294 link->addresses_configured = false;
6aa5773b 1295 link->addresses_ready = false;
2428613f
YW		 1296 link->neighbors_configured = false;
1297 link->static_routes_configured = false;
c16c7808 1298 link->static_nexthops_configured = false;
2428613f
YW		 1299 link->routing_policy_rules_configured = false;
1300
f6bb7ac5
TJ		 1301 r = link_set_bridge_fdb(link);
1302 if (r < 0)
1303 return r;
1304
1f241589
YW		 1305 r = link_set_bridge_mdb(link);
1306 if (r < 0)
1307 return r;
1308
f3ef324d
YW		 1309 r = link_request_set_neighbors(link);
1310 if (r < 0)
1311 return r;
e4a71bf3 1312
3d3d4255 1313 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1314 bool update;
1315
6f5d73ab
YW		 1316 if (ad->family == AF_INET6 && !in_addr_is_null(ad->family, &ad->in_addr_peer))
1317 update = address_get(link, ad->family, &ad->in_addr_peer, ad->prefixlen, NULL) > 0;
1318 else
1319 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
a47a6dae 1320
e5526518 1321 r = static_address_configure(ad, link, update);
4ff296b0 1322 if (r < 0)
e5526518 1323 return r;
95b74ef6
SS		 1324 }
1325
61c0ef4f 1326 if (link->network->router_prefix_delegation & RADV_PREFIX_DELEGATION_STATIC)
bd6379ec
SS		 1327 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1328 _cleanup_(address_freep) Address *address = NULL;
1329
1330 if (!p->assign)
1331 continue;
1332
1333 r = address_new(&address);
1334 if (r < 0)
e5526518 1335 return log_oom();
bd6379ec
SS		 1336
1337 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1338 if (r < 0)
e5526518 1339 return log_link_warning_errno(link, r, "Could not get RA prefix: %m");
bd6379ec
SS		 1340
1341 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1342 if (r < 0)
e5526518 1343 return log_link_warning_errno(link, r, "Could not generate EUI64 address: %m");
bd6379ec
SS		 1344
1345 address->family = AF_INET6;
e5526518 1346 r = static_address_configure(address, link, true);
bd6379ec 1347 if (r < 0)
e5526518 1348 return r;
bd6379ec
SS		 1349 }
1350
95b74ef6 1351 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1352 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1353 if (r < 0)
1354 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1355
7715629e 1356 link->address_label_messages++;
f882c247
TG		 1357 }
1358
e5526518 1359 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 1360 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1361 r = dhcp4_server_configure(link);
4ff296b0 1362 if (r < 0)
d4cdbea5 1363 return r;
6a7a4e4d 1364 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1365 }
1366
c42ff3a1
WKI		 1367 if (link->address_messages == 0) {
1368 link->addresses_configured = true;
e5526518
YW		 1369 link->addresses_ready = true;
1370 r = link_request_set_routes(link);
1371 if (r < 0)
1372 return r;
b425c3ae 1373 } else {
6a7a4e4d 1374 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1375 link_set_state(link, LINK_STATE_CONFIGURING);
1376 }
431ca2ce 1377
f882c247
TG		 1378 return 0;
1379}
1380
13b498f9 1381static int link_set_bridge_vlan(Link *link) {
86e2be7b 1382 int r;
13b498f9
TJ		 1383
1384 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1385 if (r < 0)
1386 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1387
1388 return r;
1389}
1390
a60a720c 1391static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1392 int r;
1393
1394 if (!link_proxy_arp_enabled(link))
1395 return 0;
1396
62e021a9 1397 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1398 if (r < 0)
1399 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1400
1401 return 0;
1402}
1403
3a390124 1404static int link_configure_continue(Link *link);
55dc8c4a 1405
302a796f 1406static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1407 int r;
1408
1409 assert(m);
1410 assert(link);
1411 assert(link->ifname);
1412
55dc8c4a
YW		 1413 link->setting_mtu = false;
1414
5da8149f 1415 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1416 return 1;
1417
1c4baffc 1418 r = sd_netlink_message_get_errno(m);
4ff296b0 1419 if (r < 0)
5ecb131d 1420 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1421 else
1422 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1423
4ff296b0 1424 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1425 r = link_configure_continue(link);
4ff296b0
YW		 1426 if (r < 0)
1427 link_enter_failed(link);
1428 }
4f882b2a
TG		 1429
1430 return 1;
1431}
1432
933c70a0 1433int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1434 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1435 int r;
1436
1437 assert(link);
1438 assert(link->manager);
1439 assert(link->manager->rtnl);
1440
40288ece
YW		 1441 if (mtu == 0 || link->setting_mtu)
1442 return 0;
1443
933c70a0 1444 if (link->mtu == mtu)
ee493106
YW		 1445 return 0;
1446
6a7a4e4d 1447 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1448
6a7a4e4d
LP		 1449 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1450 if (r < 0)
1451 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1452
44b598a1 1453 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1454 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1455 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1456
1457 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1458 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1459
72c2500b 1460 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1461 }
1462
1c4baffc 1463 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1466
302a796f
YW		 1467 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1468 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1469 if (r < 0)
1470 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1471
ae941762 1472 link_ref(link);
1046bf9b 1473 link->setting_mtu = true;
b226d99b 1474
4f882b2a
TG		 1475 return 0;
1476}
1477
f6fcc1c2
YW		 1478static bool link_reduces_vlan_mtu(Link *link) {
1479 /* See netif_reduces_vlan_mtu() in kernel. */
1480 return streq_ptr(link->kind, "macsec");
1481}
1482
1483static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1484 uint32_t mtu = 0;
1485 NetDev *dev;
f6fcc1c2 1486
90e74a66 1487 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1488 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1489 /* See vlan_dev_change_mtu() in kernel. */
1490 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1491
1492 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1493 /* See macvlan_change_mtu() in kernel. */
1494 mtu = dev->mtu;
1495
1496 return mtu;
1497}
1498
1499static int link_configure_mtu(Link *link) {
1500 uint32_t mtu;
1501
1502 assert(link);
1503 assert(link->network);
1504
1505 if (link->network->mtu > 0)
1506 return link_set_mtu(link, link->network->mtu);
1507
1508 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1509 if (link->mtu >= mtu)
1510 return 0;
1511
1512 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1513 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1514 link->mtu, mtu);
1515
1516 return link_set_mtu(link, mtu);
1517}
1518
302a796f 1519static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1520 int r;
1521
1522 assert(m);
1523 assert(link);
1524 assert(link->ifname);
1525
1526 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1527 return 1;
1528
1529 r = sd_netlink_message_get_errno(m);
1530 if (r < 0)
5ecb131d 1531 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1532
1533 return 1;
1534}
1535
1536static int link_set_flags(Link *link) {
1537 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1538 unsigned ifi_change = 0;
1539 unsigned ifi_flags = 0;
1540 int r;
1541
1542 assert(link);
1543 assert(link->manager);
1544 assert(link->manager->rtnl);
1545
1546 if (link->flags & IFF_LOOPBACK)
1547 return 0;
1548
1549 if (!link->network)
1550 return 0;
1551
866e6b7a 1552 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1553 return 0;
1554
1555 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1556 if (r < 0)
1557 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1558
1559 if (link->network->arp >= 0) {
1560 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1561 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1562 }
1563
1564 if (link->network->multicast >= 0) {
1565 ifi_change |= IFF_MULTICAST;
1566 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1567 }
1568
866e6b7a
SS		 1569 if (link->network->allmulticast >= 0) {
1570 ifi_change |= IFF_ALLMULTI;
1571 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1572 }
1573
99d2baa2
SS		 1574 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1575 if (r < 0)
1576 return log_link_error_errno(link, r, "Could not set link flags: %m");
1577
302a796f
YW		 1578 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1579 link_netlink_destroy_callback, link);
99d2baa2
SS		 1580 if (r < 0)
1581 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1582
1583 link_ref(link);
1584
1585 return 0;
1586}
1587
e7ab854c
TG		 1588static int link_acquire_ipv6_conf(Link *link) {
1589 int r;
1590
1591 assert(link);
1592
e7ab854c 1593 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1594 assert(link->ndisc);
e7ab854c
TG		 1595
1596 log_link_debug(link, "Discovering IPv6 routers");
1597
1e7a0e21 1598 r = sd_ndisc_start(link->ndisc);
63348d13 1599 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1600 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1601 }
1602
7465dd22
PF		 1603 if (link_radv_enabled(link)) {
1604 assert(link->radv);
1605 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1606
1607 log_link_debug(link, "Starting IPv6 Router Advertisements");
1608
fd3ef936
YW		 1609 r = radv_emit_dns(link);
1610 if (r < 0)
1611 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1612
7465dd22
PF		 1613 r = sd_radv_start(link->radv);
1614 if (r < 0 && r != -EBUSY)
1615 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1616 }
1617
838d39af
SS		 1618 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1619 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1620 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1621 assert(link->dhcp6_client);
1622 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1623
838d39af 1624 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1625 if (r < 0 && r != -EBUSY)
1633c457 1626 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1627 else
1628 log_link_debug(link, "Acquiring DHCPv6 lease");
1629 }
1630
1633c457
YW		 1631 r = dhcp6_request_prefix_delegation(link);
1632 if (r < 0)
1633 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1634
e7ab854c
TG		 1635 return 0;
1636}
1637
6fc25497 1638static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1639 int r;
1640
1641 assert(link);
ff254138
TG		 1642 assert(link->manager);
1643 assert(link->manager->event);
1644
910feb78 1645 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1646 assert(link->ipv4ll);
ff254138 1647
6a7a4e4d 1648 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1649
1650 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1651 if (r < 0)
1652 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1653 }
1654
78c958f8 1655 if (link_dhcp4_enabled(link)) {
eb34d4af 1656 assert(link->dhcp_client);
ff254138 1657
6a7a4e4d 1658 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1659
5c1d3fc9 1660 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1661 if (r < 0)
1662 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1663 }
ff254138 1664
6fc25497
SS		 1665 return 0;
1666}
1667
1668static int link_acquire_conf(Link *link) {
1669 int r;
1670
1671 assert(link);
1672
1673 r = link_acquire_ipv4_conf(link);
1674 if (r < 0)
1675 return r;
1676
3f7cc080 1677 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1678 r = link_acquire_ipv6_conf(link);
1679 if (r < 0)
1680 return r;
1681 }
1682
7272b25e
LP		 1683 if (link_lldp_emit_enabled(link)) {
1684 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1685 if (r < 0)
1686 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1687 }
1688
ff254138
TG		 1689 return 0;
1690}
1691
a61bb41c 1692bool link_has_carrier(Link *link) {
deb2e523
TG		 1693 /* see Documentation/networking/operstates.txt in the kernel sources */
1694
a61bb41c 1695 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1696 return true;
1697
a61bb41c 1698 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1699 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1700 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1701 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1702 return true;
1703
1704 return false;
1705}
1706
0e2fdb83
SS		 1707static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1708 int r;
1709
1710 assert(link);
1711
9524014e
DS		 1712 link->setting_genmode = false;
1713
0e2fdb83
SS		 1714 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1715 return 1;
1716
1717 r = sd_netlink_message_get_errno(m);
1718 if (r < 0)
5ecb131d 1719 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1720 else
1721 log_link_debug(link, "Setting address genmode done.");
1722
1723 if (link->state == LINK_STATE_INITIALIZED) {
1724 r = link_configure_continue(link);
1725 if (r < 0)
1726 link_enter_failed(link);
1727 }
0e2fdb83
SS		 1728
1729 return 1;
1730}
1731
1732static int link_configure_addrgen_mode(Link *link) {
1733 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1734 uint8_t ipv6ll_mode;
1735 int r;
1736
1737 assert(link);
1738 assert(link->network);
1739 assert(link->manager);
1740 assert(link->manager->rtnl);
1741
9524014e 1742 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1743 return 0;
1744
0e2fdb83
SS		 1745 log_link_debug(link, "Setting address genmode for link");
1746
1747 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1748 if (r < 0)
1749 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1750
1751 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1752 if (r < 0)
1753 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1754
1755 r = sd_netlink_message_open_container(req, AF_INET6);
1756 if (r < 0)
1757 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1758
1759 if (!link_ipv6ll_enabled(link))
1760 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1761 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1762 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1763 if (r < 0) {
1764 /* The file may not exist. And even if it exists, when stable_secret is unset,
1765 * reading the file fails with EIO. */
1766 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1767
1768 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1769 } else
1770 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1771 } else
6f6296b9 1772 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1773
1774 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1777
1778 r = sd_netlink_message_close_container(req);
1779 if (r < 0)
1780 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1781
1782 r = sd_netlink_message_close_container(req);
1783 if (r < 0)
1784 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1785
1786 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1787 link_netlink_destroy_callback, link);
1788 if (r < 0)
1789 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1790
1791 link_ref(link);
9524014e 1792 link->setting_genmode = true;
0e2fdb83
SS		 1793
1794 return 0;
1795}
1796
302a796f 1797static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1798 int r;
1799
1746cf2a
TG		 1800 assert(link);
1801
5da8149f 1802 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1803 return 1;
1804
1c4baffc 1805 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1806 if (r < 0)
26d6b214 1807 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1808 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1809
f882c247
TG		 1810 return 1;
1811}
1812
1cc84f3b 1813static int link_up(Link *link) {
4afd3348 1814 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1815 int r;
1816
f882c247 1817 assert(link);
c106cc36 1818 assert(link->network);
f882c247
TG		 1819 assert(link->manager);
1820 assert(link->manager->rtnl);
1821
6a7a4e4d 1822 log_link_debug(link, "Bringing link up");
449f7554 1823
6a7a4e4d
LP		 1824 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1825 if (r < 0)
1826 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1827
2b2d8603 1828 /* set it free if not enslaved with networkd */
6cb955c6 1829 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1830 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1831 if (r < 0)
1832 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1833 }
1834
5d4795f3 1835 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1836 if (r < 0)
1837 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1838
c106cc36 1839 if (link->network->mac) {
1c4baffc 1840 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1841 if (r < 0)
1842 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1843 }
1844
302a796f
YW		 1845 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1846 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1847 if (r < 0)
1848 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1849
b226d99b
TG		 1850 link_ref(link);
1851
f882c247
TG		 1852 return 0;
1853}
1854
302a796f 1855static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1856 int r;
1857
1858 assert(link);
1859
1860 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1861 return 1;
1862
1c4baffc 1863 r = sd_netlink_message_get_errno(m);
0d4ad91d 1864 if (r < 0)
5ecb131d 1865 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1866
1867 return 1;
1868}
1869
8e54db83 1870int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1871 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1872 int r;
1873
1874 assert(link);
1875 assert(link->manager);
1876 assert(link->manager->rtnl);
1877
6a7a4e4d 1878 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1879
1880 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1881 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1882 if (r < 0)
1883 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1884
1885 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1886 if (r < 0)
1887 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1888
8e54db83
YW		 1889 r = netlink_call_async(link->manager->rtnl, NULL, req,
1890 callback ?: link_down_handler,
302a796f 1891 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1892 if (r < 0)
1893 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1894
1895 link_ref(link);
1896
1897 return 0;
1898}
1899
89fe6535
SS		 1900static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1901 int r;
1902
1903 assert(link);
1904
1905 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1906 return 1;
1907
1908 r = sd_netlink_message_get_errno(m);
1909 if (r < 0)
1910 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1911
1912 return 1;
1913}
1914
1915static int link_set_group(Link *link) {
1916 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1917 int r;
1918
1919 assert(link);
1920 assert(link->network);
1921 assert(link->manager);
1922 assert(link->manager->rtnl);
1923
1924 if (link->network->group <= 0)
1925 return 0;
1926
1927 log_link_debug(link, "Setting group");
1928
1929 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1930 if (r < 0)
1931 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1932
1933 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1934 if (r < 0)
1935 return log_link_error_errno(link, r, "Could not set link group: %m");
1936
1937 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1938 link_netlink_destroy_callback, link);
1939 if (r < 0)
1940 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1941
1942 link_ref(link);
1943
1944 return 0;
1945}
1946
0d4ad91d
AR		 1947static int link_handle_bound_to_list(Link *link) {
1948 Link *l;
0d4ad91d
AR		 1949 int r;
1950 bool required_up = false;
1951 bool link_is_up = false;
1952
1953 assert(link);
1954
1955 if (hashmap_isempty(link->bound_to_links))
1956 return 0;
1957
1958 if (link->flags & IFF_UP)
1959 link_is_up = true;
1960
90e74a66 1961 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1962 if (link_has_carrier(l)) {
1963 required_up = true;
1964 break;
1965 }
1966
1967 if (!required_up && link_is_up) {
8e54db83 1968 r = link_down(link, NULL);
0d4ad91d
AR		 1969 if (r < 0)
1970 return r;
1971 } else if (required_up && !link_is_up) {
1972 r = link_up(link);
1973 if (r < 0)
1974 return r;
1975 }
1976
1977 return 0;
1978}
1979
1980static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1981 Link *l;
1982 int r;
1983
1984 assert(link);
1985
1986 if (hashmap_isempty(link->bound_by_links))
1987 return 0;
1988
90e74a66 1989 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1990 r = link_handle_bound_to_list(l);
1991 if (r < 0)
1992 return r;
1993 }
1994
1995 return 0;
1996}
1997
1998static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1999 int r;
2000
2001 assert(link);
2002 assert(carrier);
2003
2004 if (link == carrier)
2005 return 0;
2006
2007 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2008 return 0;
2009
2010 r = hashmap_ensure_allocated(h, NULL);
2011 if (r < 0)
2012 return r;
2013
2014 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2015 if (r < 0)
2016 return r;
2017
2018 return 0;
2019}
2020
2021static int link_new_bound_by_list(Link *link) {
2022 Manager *m;
2023 Link *carrier;
0d4ad91d
AR		 2024 int r;
2025 bool list_updated = false;
2026
2027 assert(link);
2028 assert(link->manager);
2029
2030 m = link->manager;
2031
90e74a66 2032 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 2033 if (!carrier->network)
2034 continue;
2035
2036 if (strv_isempty(carrier->network->bind_carrier))
2037 continue;
2038
191a3f16 2039 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 2040 r = link_put_carrier(link, carrier, &link->bound_by_links);
2041 if (r < 0)
2042 return r;
2043
2044 list_updated = true;
2045 }
2046 }
2047
2048 if (list_updated)
84de38c5 2049 link_dirty(link);
0d4ad91d 2050
90e74a66 2051 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 2052 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2053 if (r < 0)
2054 return r;
2055
84de38c5 2056 link_dirty(carrier);
0d4ad91d
AR		 2057 }
2058
2059 return 0;
2060}
2061
2062static int link_new_bound_to_list(Link *link) {
2063 Manager *m;
2064 Link *carrier;
0d4ad91d
AR		 2065 int r;
2066 bool list_updated = false;
2067
2068 assert(link);
2069 assert(link->manager);
2070
2071 if (!link->network)
2072 return 0;
2073
2074 if (strv_isempty(link->network->bind_carrier))
2075 return 0;
2076
2077 m = link->manager;
2078
90e74a66 2079 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 2080 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2081 r = link_put_carrier(link, carrier, &link->bound_to_links);
2082 if (r < 0)
2083 return r;
2084
2085 list_updated = true;
2086 }
2087 }
2088
2089 if (list_updated)
84de38c5 2090 link_dirty(link);
0d4ad91d 2091
90e74a66 2092 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 2093 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2094 if (r < 0)
2095 return r;
2096
84de38c5 2097 link_dirty(carrier);
0d4ad91d
AR		 2098 }
2099
2100 return 0;
2101}
2102
2103static int link_new_carrier_maps(Link *link) {
2104 int r;
2105
2106 r = link_new_bound_by_list(link);
2107 if (r < 0)
2108 return r;
2109
2110 r = link_handle_bound_by_list(link);
2111 if (r < 0)
2112 return r;
2113
2114 r = link_new_bound_to_list(link);
2115 if (r < 0)
2116 return r;
2117
2118 r = link_handle_bound_to_list(link);
2119 if (r < 0)
2120 return r;
2121
2122 return 0;
2123}
2124
2125static void link_free_bound_to_list(Link *link) {
2126 Link *bound_to;
0d4ad91d 2127
90e74a66 2128 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 2129 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2130
2131 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2132 link_dirty(bound_to);
0d4ad91d
AR		 2133 }
2134
2135 return;
2136}
2137
2138static void link_free_bound_by_list(Link *link) {
2139 Link *bound_by;
0d4ad91d 2140
90e74a66 2141 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 2142 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2143
2144 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2145 link_dirty(bound_by);
0d4ad91d
AR		 2146 link_handle_bound_to_list(bound_by);
2147 }
2148 }
2149
2150 return;
2151}
2152
2153static void link_free_carrier_maps(Link *link) {
2154 bool list_updated = false;
2155
2156 assert(link);
2157
2158 if (!hashmap_isempty(link->bound_to_links)) {
2159 link_free_bound_to_list(link);
2160 list_updated = true;
2161 }
2162
2163 if (!hashmap_isempty(link->bound_by_links)) {
2164 link_free_bound_by_list(link);
2165 list_updated = true;
2166 }
2167
2168 if (list_updated)
84de38c5 2169 link_dirty(link);
0d4ad91d
AR		 2170
2171 return;
2172}
2173
5f707e12
YW		 2174static int link_append_to_master(Link *link, NetDev *netdev) {
2175 Link *master;
2176 int r;
2177
2178 assert(link);
2179 assert(netdev);
2180
2181 r = link_get(link->manager, netdev->ifindex, &master);
2182 if (r < 0)
2183 return r;
2184
de7fef4b 2185 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2186 if (r <= 0)
5f707e12
YW		 2187 return r;
2188
2189 link_ref(link);
2190 return 0;
2191}
2192
2193static void link_drop_from_master(Link *link, NetDev *netdev) {
2194 Link *master;
2195
2196 assert(link);
2197
2198 if (!link->manager || !netdev)
2199 return;
2200
2201 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2202 return;
2203
2204 link_unref(set_remove(master->slaves, link));
2205}
2206
2207static void link_detach_from_manager(Link *link) {
2208 if (!link || !link->manager)
2209 return;
2210
2211 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2212 link_clean(link);
2213
2214 /* The following must be called at last. */
2215 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2216 link_unref(link);
2217}
2218
0d4ad91d
AR		 2219void link_drop(Link *link) {
2220 if (!link || link->state == LINK_STATE_LINGER)
2221 return;
2222
2223 link_set_state(link, LINK_STATE_LINGER);
2224
2225 link_free_carrier_maps(link);
2226
5f707e12
YW		 2227 if (link->network) {
2228 link_drop_from_master(link, link->network->bridge);
2229 link_drop_from_master(link, link->network->bond);
2230 }
2231
6a7a4e4d 2232 log_link_debug(link, "Link removed");
0d4ad91d 2233
db2f8a2e 2234 (void) unlink(link->state_file);
c4397d94 2235 link_detach_from_manager(link);
0d4ad91d
AR		 2236}
2237
3f265037 2238static int link_joined(Link *link) {
f882c247
TG		 2239 int r;
2240
ef1ba606 2241 assert(link);
f5be5601 2242 assert(link->network);
dd3efc09 2243
0d4ad91d
AR		 2244 if (!hashmap_isempty(link->bound_to_links)) {
2245 r = link_handle_bound_to_list(link);
2246 if (r < 0)
2247 return r;
2248 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2249 r = link_up(link);
2250 if (r < 0) {
2251 link_enter_failed(link);
2252 return r;
2253 }
ef1ba606 2254 }
f882c247 2255
9ed794a3 2256 if (link->network->bridge) {
e1853b00 2257 r = link_set_bridge(link);
6a7a4e4d
LP		 2258 if (r < 0)
2259 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2260
2261 r = link_append_to_master(link, link->network->bridge);
2262 if (r < 0)
2263 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2264 }
2265
eb64b435 2266 if (link->network->bond) {
7fcee284 2267 r = link_set_bond(link);
eb64b435
SS		 2268 if (r < 0)
2269 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2270
45e11abf 2271 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2272 if (r < 0)
2273 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2274 }
2275
ffff9abe
TJ		 2276 if (link->network->use_br_vlan &&
2277 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2278 r = link_set_bridge_vlan(link);
2279 if (r < 0)
2280 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2281 }
2282
c1835a42
RM		 2283 /* Skip setting up addresses until it gets carrier,
2284 or it would try to set addresses twice,
2285 which is bad for non-idempotent steps. */
dad2d78e 2286 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2287 return 0;
2288
b425c3ae 2289 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2290 return link_request_set_addresses(link);
02b59d57
TG		 2291}
2292
302a796f 2293static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2294 int r;
2295
1746cf2a 2296 assert(link);
ef1ba606 2297 assert(link->network);
34bf3c00 2298 assert(link->enslaving > 0);
02b59d57 2299
313cefa1 2300 link->enslaving--;
52433f6b 2301
5da8149f 2302 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2303 return 1;
2304
1c4baffc 2305 r = sd_netlink_message_get_errno(m);
856f962c 2306 if (r < 0 && r != -EEXIST) {
5ecb131d 2307 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2308 link_enter_failed(link);
2309 return 1;
4ff296b0
YW		 2310 }
2311
2312 log_link_debug(link, "Joined netdev");
02b59d57 2313
34bf3c00 2314 if (link->enslaving == 0) {
4ff296b0
YW		 2315 r = link_joined(link);
2316 if (r < 0)
2317 link_enter_failed(link);
34bf3c00 2318 }
02b59d57
TG		 2319
2320 return 1;
2321}
2322
3f265037 2323static int link_enter_join_netdev(Link *link) {
6a0a2f86 2324 NetDev *netdev;
02b59d57
TG		 2325 int r;
2326
2327 assert(link);
2328 assert(link->network);
bd08ce56 2329 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2330
289e6774 2331 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2332
84de38c5 2333 link_dirty(link);
34bf3c00 2334 link->enslaving = 0;
02b59d57 2335
d9c67ea1 2336 if (link->network->bond) {
cbff7170
TJ		 2337 if (link->network->bond->state == NETDEV_STATE_READY &&
2338 link->network->bond->ifindex == link->master_ifindex)
2339 return link_joined(link);
2340
f2341e0a
LP		 2341 log_struct(LOG_DEBUG,
2342 LOG_LINK_INTERFACE(link),
2343 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2344 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2345
34bf3c00
YW		 2346 link->enslaving++;
2347
f2341e0a 2348 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2349 if (r < 0) {
f2341e0a
LP		 2350 log_struct_errno(LOG_WARNING, r,
2351 LOG_LINK_INTERFACE(link),
2352 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2353 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2354 link_enter_failed(link);
2355 return r;
2356 }
0ad6148e
MO		 2357 }
2358
d9c67ea1 2359 if (link->network->bridge) {
f2341e0a
LP		 2360 log_struct(LOG_DEBUG,
2361 LOG_LINK_INTERFACE(link),
2362 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2363 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2364
34bf3c00
YW		 2365 link->enslaving++;
2366
f2341e0a 2367 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2368 if (r < 0) {
f2341e0a
LP		 2369 log_struct_errno(LOG_WARNING, r,
2370 LOG_LINK_INTERFACE(link),
2371 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2372 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2373 link_enter_failed(link);
2374 return r;
2375 }
52433f6b
TG		 2376 }
2377
6cb955c6
AR		 2378 if (link->network->vrf) {
2379 log_struct(LOG_DEBUG,
2380 LOG_LINK_INTERFACE(link),
2381 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2382 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2383
34bf3c00
YW		 2384 link->enslaving++;
2385
6cb955c6
AR		 2386 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2387 if (r < 0) {
2388 log_struct_errno(LOG_WARNING, r,
2389 LOG_LINK_INTERFACE(link),
2390 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2391 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2392 link_enter_failed(link);
2393 return r;
2394 }
6cb955c6
AR		 2395 }
2396
90e74a66 2397 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2398
2b6db913
YW		 2399 if (netdev->ifindex > 0)
2400 /* Assume already enslaved. */
a63e5daa 2401 continue;
a63e5daa 2402
7033af49
YW		 2403 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2404 continue;
2405
f2341e0a
LP		 2406 log_struct(LOG_DEBUG,
2407 LOG_LINK_INTERFACE(link),
2408 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2409 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2410
34bf3c00
YW		 2411 link->enslaving++;
2412
f2341e0a 2413 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2414 if (r < 0) {
f2341e0a
LP		 2415 log_struct_errno(LOG_WARNING, r,
2416 LOG_LINK_INTERFACE(link),
2417 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2418 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2419 link_enter_failed(link);
2420 return r;
2421 }
326cb406
SS		 2422 }
2423
34bf3c00
YW		 2424 if (link->enslaving == 0)
2425 return link_joined(link);
2426
ef1ba606
TG		 2427 return 0;
2428}
2429
769d324c 2430static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2431 int r;
2432
765afd5c 2433 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2434 return 0;
2435
765afd5c
LP		 2436 /* We propagate the forwarding flag from one interface to the
2437 * global setting one way. This means: as long as at least one
2438 * interface was configured at any time that had IP forwarding
2439 * enabled the setting will stay on for good. We do this
2440 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2441 * somewhat in sync (see below). */
15dee3f0 2442
62e021a9 2443 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2444 if (r < 0)
765afd5c 2445 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2446
769d324c
LP		 2447 return 0;
2448}
2449
2450static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2451 int r;
2452
765afd5c 2453 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2454 return 0;
2455
61233823 2456 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2457 * packet forwarding setting: either packet forwarding is on
2458 * for all, or off for all. We hence don't bother with a
2459 * per-interface setting, but simply propagate the interface
2460 * flag, if it is set, to the global flag, one-way. Note that
2461 * while IPv4 would allow a per-interface flag, we expose the
2462 * same behaviour there and also propagate the setting from
2463 * one to all, to keep things simple (see above). */
15dee3f0 2464
62e021a9 2465 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2466 if (r < 0)
765afd5c 2467 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2468
2469 return 0;
2470}
2471
49092e22 2472static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2473 IPv6PrivacyExtensions s;
49092e22
SS		 2474 int r;
2475
1f0d9695 2476 s = link_ipv6_privacy_extensions(link);
66a6bd68 2477 if (s < 0)
49092e22
SS		 2478 return 0;
2479
62e021a9 2480 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2481 if (r < 0)
49092e22
SS		 2482 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2483
2484 return 0;
2485}
2486
4f2e437a 2487static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2488 int r;
2489
2490 /* Make this a NOP if IPv6 is not available */
2491 if (!socket_ipv6_is_supported())
2492 return 0;
2493
2494 if (link->flags & IFF_LOOPBACK)
2495 return 0;
2496
d68e2e59
LP		 2497 if (!link->network)
2498 return 0;
2499
62e021a9 2500 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2501 if (r < 0)
fe307276 2502 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2503
2504 return 0;
2505}
2506
8749cbcd 2507static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2508 int r;
2509
2510 /* Make this a NOP if IPv6 is not available */
2511 if (!socket_ipv6_is_supported())
2512 return 0;
2513
2514 if (link->flags & IFF_LOOPBACK)
2515 return 0;
2516
d68e2e59
LP		 2517 if (!link->network)
2518 return 0;
2519
8749cbcd
SS		 2520 if (link->network->ipv6_dad_transmits < 0)
2521 return 0;
2522
62e021a9 2523 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2524 if (r < 0)
8749cbcd 2525 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2526
2527 return 0;
2528}
2529
b69c3180 2530static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2531 int r;
2532
2533 /* Make this a NOP if IPv6 is not available */
2534 if (!socket_ipv6_is_supported())
2535 return 0;
2536
2537 if (link->flags & IFF_LOOPBACK)
2538 return 0;
2539
d68e2e59
LP		 2540 if (!link->network)
2541 return 0;
2542
b69c3180
SS		 2543 if (link->network->ipv6_hop_limit < 0)
2544 return 0;
2545
62e021a9 2546 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2547 if (r < 0)
b69c3180 2548 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2549
2550 return 0;
2551}
2552
11102cba 2553static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2554 int r;
2555
2556 /* Make this a NOP if IPv6 is not available */
2557 if (!socket_ipv6_is_supported())
2558 return 0;
2559
2560 if (link->flags & IFF_LOOPBACK)
2561 return 0;
2562
2563 if (link->network->ipv6_mtu == 0)
2564 return 0;
2565
d236718c
DS		 2566 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2567 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2568 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2569 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2570 link->network->ipv6_mtu = IPV6_MIN_MTU;
2571 }
2572
62e021a9 2573 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2574 if (r < 0) {
2575 if (link->mtu < link->network->ipv6_mtu)
2576 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2577 link->network->ipv6_mtu, link->mtu);
2578 else
2579 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2580 }
2581
2582 link->ipv6_mtu_set = true;
11102cba
SS		 2583
2584 return 0;
2585}
2586
94d76d07
YW		 2587static int link_set_ipv4_accept_local(Link *link) {
2588 int r;
2589
2590 if (link->flags & IFF_LOOPBACK)
2591 return 0;
2592
2593 if (link->network->ipv4_accept_local < 0)
2594 return 0;
2595
2596 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2597 if (r < 0)
2598 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2599
2600 return 0;
2601}
2602
30226d27
TJ		 2603static bool link_is_static_address_configured(Link *link, Address *address) {
2604 Address *net_address;
2605
2606 assert(link);
2607 assert(address);
2608
2609 if (!link->network)
2610 return false;
2611
2612 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2613 if (address_equal(net_address, address))
2614 return true;
6f5d73ab
YW		 2615 else if (address->family == AF_INET6 && net_address->family == AF_INET6 &&
2616 in_addr_equal(AF_INET6, &address->in_addr, &net_address->in_addr_peer) > 0)
2617 return true;
30226d27
TJ		 2618
2619 return false;
2620}
2621
d1bdafd2
WKI		 2622static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2623 Neighbor *net_neighbor;
2624
2625 assert(link);
2626 assert(neighbor);
2627
2628 if (!link->network)
2629 return false;
2630
2631 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2632 if (neighbor_equal(net_neighbor, neighbor))
2633 return true;
2634
2635 return false;
2636}
2637
7ecf0c3e
TJ		 2638static bool link_is_static_route_configured(Link *link, Route *route) {
2639 Route *net_route;
2640
2641 assert(link);
2642 assert(route);
2643
2644 if (!link->network)
2645 return false;
2646
2647 LIST_FOREACH(routes, net_route, link->network->static_routes)
2648 if (route_equal(net_route, route))
2649 return true;
2650
2651 return false;
2652}
2653
db51778f
YW		 2654static bool link_address_is_dynamic(Link *link, Address *address) {
2655 Route *route;
db51778f
YW		 2656
2657 assert(link);
2658 assert(address);
2659
2660 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2661 return true;
2662
2663 /* Even when the address is leased from a DHCP server, networkd assign the address
2664 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2665 * corresponding routes with RTPROT_DHCP. */
90e74a66 2666 SET_FOREACH(route, link->routes_foreign) {
db51778f
YW		 2667 if (route->protocol != RTPROT_DHCP)
2668 continue;
2669
2670 if (address->family != route->family)
2671 continue;
2672
2673 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2674 return true;
2675 }
2676
2677 return false;
2678}
2679
0917a271
DS		 2680static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2681 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2682 sd_netlink_message *addr;
2683 int r;
2684
2685 assert(link);
2686 assert(link->manager);
2687 assert(link->manager->rtnl);
2688
2689 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2690 if (r < 0)
2691 return r;
2692
2693 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2694 if (r < 0)
2695 return r;
2696
2697 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2698 unsigned char flags;
2699 int ifindex;
2700
2701 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2702 if (r < 0) {
2703 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2704 continue;
2705 } else if (link->ifindex != ifindex)
2706 continue;
2707
2708 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2709 if (r < 0) {
2710 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2711 continue;
2712 } else if (!(flags & IFA_F_TENTATIVE))
2713 continue;
2714
2715 log_link_debug(link, "Found tentative ipv6 link-local address");
2716 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2717 }
2718
2719 return 0;
2720}
2721
5e5b137a
TG		 2722static int link_drop_foreign_config(Link *link) {
2723 Address *address;
d1bdafd2 2724 Neighbor *neighbor;
5e5b137a 2725 Route *route;
5e5b137a
TG		 2726 int r;
2727
0917a271
DS		 2728 /* The kernel doesn't notify us about tentative addresses;
2729 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2730 if (!link_ipv6ll_enabled(link)) {
2731 r = link_enumerate_ipv6_tentative_addresses(link);
2732 if (r < 0)
2733 return r;
2734 }
2735
90e74a66 2736 SET_FOREACH(address, link->addresses_foreign) {
fe307276 2737 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2738 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2739 continue;
2740
db51778f 2741 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2742 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2743 continue;
b1b0b42e 2744 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2745 continue;
2746
30226d27
TJ		 2747 if (link_is_static_address_configured(link, address)) {
2748 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2749 if (r < 0)
2750 return log_link_error_errno(link, r, "Failed to add address: %m");
2751 } else {
63ae0569 2752 r = address_remove(address, link, NULL);
30226d27
TJ		 2753 if (r < 0)
2754 return r;
2755 }
5e5b137a
TG		 2756 }
2757
90e74a66 2758 SET_FOREACH(neighbor, link->neighbors_foreign) {
d1bdafd2
WKI		 2759 if (link_is_neighbor_configured(link, neighbor)) {
2760 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2761 if (r < 0)
2762 return r;
2763 } else {
2764 r = neighbor_remove(neighbor, link, NULL);
2765 if (r < 0)
2766 return r;
2767 }
2768 }
2769
90e74a66 2770 SET_FOREACH(route, link->routes_foreign) {
fe307276 2771 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2772 if (route->protocol == RTPROT_KERNEL)
2773 continue;
2774
bd7d6cec
YW		 2775 /* do not touch multicast route added by kernel */
2776 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2777 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2778 if (route->protocol == RTPROT_BOOT &&
2779 route->family == AF_INET6 &&
2780 route->dst_prefixlen == 8 &&
2781 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 }}} }))
2782 continue;
2783
b1b0b42e 2784 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2785 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2786 continue;
2787
b1b0b42e 2788 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2789 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2790 continue;
2791
7ecf0c3e 2792 if (link_is_static_route_configured(link, route)) {
f1368755 2793 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2794 if (r < 0)
2795 return r;
2796 } else {
4645ad47 2797 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2798 if (r < 0)
2799 return r;
2800 }
5e5b137a
TG		 2801 }
2802
2803 return 0;
2804}
2805
9b966cee
YW		 2806static int remove_static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2807 int r;
2808
2809 assert(m);
2810 assert(link);
2811 assert(link->ifname);
2812 assert(link->address_remove_messages > 0);
2813
2814 link->address_remove_messages--;
2815
2816 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2817 return 1;
2818
2819 r = sd_netlink_message_get_errno(m);
2820 if (r < 0 && r != -EADDRNOTAVAIL)
2821 log_link_message_warning_errno(link, m, r, "Could not drop address");
2822 else if (r >= 0)
2823 (void) manager_rtnl_process_address(rtnl, m, link->manager);
2824
2825 if (link->address_remove_messages == 0 && link->request_static_addresses) {
2826 link_set_state(link, LINK_STATE_CONFIGURING);
2827 r = link_request_set_addresses(link);
2828 if (r < 0)
2829 link_enter_failed(link);
2830 }
2831
2832 return 1;
2833}
2834
3104883d 2835static int link_drop_config(Link *link) {
410a7f15 2836 Address *address, *pool_address;
d1bdafd2 2837 Neighbor *neighbor;
3104883d 2838 Route *route;
3104883d
SS		 2839 int r;
2840
90e74a66 2841 SET_FOREACH(address, link->addresses) {
3104883d 2842 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2843 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2844 continue;
2845
9b966cee 2846 r = address_remove(address, link, remove_static_address_handler);
3104883d
SS		 2847 if (r < 0)
2848 return r;
410a7f15 2849
9b966cee
YW		 2850 link->address_remove_messages++;
2851
410a7f15 2852 /* If this address came from an address pool, clean up the pool */
b6766fb1 2853 LIST_FOREACH(addresses, pool_address, link->pool_addresses)
410a7f15
RM		 2854 if (address_equal(address, pool_address)) {
2855 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2856 address_free(pool_address);
2857 break;
2858 }
3104883d
SS		 2859 }
2860
90e74a66 2861 SET_FOREACH(neighbor, link->neighbors) {
d1bdafd2
WKI		 2862 r = neighbor_remove(neighbor, link, NULL);
2863 if (r < 0)
2864 return r;
2865 }
2866
90e74a66 2867 SET_FOREACH(route, link->routes) {
3104883d
SS		 2868 /* do not touch routes managed by the kernel */
2869 if (route->protocol == RTPROT_KERNEL)
2870 continue;
2871
4645ad47 2872 r = route_remove(route, link, NULL);
3104883d
SS		 2873 if (r < 0)
2874 return r;
2875 }
2876
c69305ff
LP		 2877 ndisc_flush(link);
2878
3104883d
SS		 2879 return 0;
2880}
2881
051e77ca
SS		 2882static int link_configure_ipv4_dad(Link *link) {
2883 Address *address;
2884 int r;
2885
2886 assert(link);
2887 assert(link->network);
2888
2889 LIST_FOREACH(addresses, address, link->network->static_addresses)
2890 if (address->family == AF_INET &&
2891 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2892 r = configure_ipv4_duplicate_address_detection(link, address);
2893 if (r < 0)
2894 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2895 }
2896
2897 return 0;
2898}
2899
34658df2
YW		 2900static int link_configure_traffic_control(Link *link) {
2901 TrafficControl *tc;
02b59d57
TG		 2902 int r;
2903
34658df2
YW		 2904 link->tc_configured = false;
2905 link->tc_messages = 0;
4ecdcb07 2906
90e74a66 2907 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2908 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2909 if (r < 0)
2910 return r;
2911 }
2912
34658df2
YW		 2913 if (link->tc_messages == 0)
2914 link->tc_configured = true;
4ecdcb07 2915 else
34658df2 2916 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2917
2918 return 0;
2919}
2920
518cd6b5
SS		 2921static int link_configure_sr_iov(Link *link) {
2922 SRIOV *sr_iov;
518cd6b5
SS		 2923 int r;
2924
2925 link->sr_iov_configured = false;
2926 link->sr_iov_messages = 0;
2927
90e74a66 2928 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 2929 r = sr_iov_configure(link, sr_iov);
2930 if (r < 0)
2931 return r;
2932 }
2933
2934 if (link->sr_iov_messages == 0)
2935 link->sr_iov_configured = true;
2936 else
2937 log_link_debug(link, "Configuring SR-IOV");
2938
2939 return 0;
2940}
2941
4ecdcb07
YW		 2942static int link_configure(Link *link) {
2943 int r;
2944
ef1ba606 2945 assert(link);
b22d8a00 2946 assert(link->network);
bd08ce56 2947 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2948
34658df2 2949 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2950 if (r < 0)
2951 return r;
2952
518cd6b5
SS		 2953 r = link_configure_sr_iov(link);
2954 if (r < 0)
2955 return r;
2956
500b96eb 2957 if (link->iftype == ARPHRD_CAN)
93ea7750 2958 return link_configure_can(link);
92c918b0 2959
482efedc
SS		 2960 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2961 * for this interface, then enable IPv6 */
57ad7607 2962 (void) link_update_ipv6_sysctl(link);
482efedc 2963
23d8b221
SS		 2964 r = link_set_proxy_arp(link);
2965 if (r < 0)
2966 return r;
2967
a0e5c15d
FK		 2968 r = ipv6_proxy_ndp_addresses_configure(link);
2969 if (r < 0)
2970 return r;
2971
769d324c
LP		 2972 r = link_set_ipv4_forward(link);
2973 if (r < 0)
2974 return r;
2975
2976 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2977 if (r < 0)
2978 return r;
2979
49092e22
SS		 2980 r = link_set_ipv6_privacy_extensions(link);
2981 if (r < 0)
2982 return r;
2983
4f2e437a
SS		 2984 r = link_set_ipv6_accept_ra(link);
2985 if (r < 0)
2986 return r;
2987
8749cbcd
SS		 2988 r = link_set_ipv6_dad_transmits(link);
2989 if (r < 0)
2990 return r;
b69c3180
SS		 2991
2992 r = link_set_ipv6_hop_limit(link);
2993 if (r < 0)
2994 return r;
8749cbcd 2995
94d76d07
YW		 2996 r = link_set_ipv4_accept_local(link);
2997 if (r < 0)
2998 return r;
2999
99d2baa2
SS		 3000 r = link_set_flags(link);
3001 if (r < 0)
3002 return r;
3003
89fe6535
SS		 3004 r = link_set_group(link);
3005 if (r < 0)
3006 return r;
3007
910feb78 3008 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 3009 r = ipv4ll_configure(link);
eb34d4af
TG		 3010 if (r < 0)
3011 return r;
3012 }
3013
78c958f8 3014 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3015 r = dhcp4_set_promote_secondaries(link);
3016 if (r < 0)
3017 return r;
3018
3c9b8860 3019 r = dhcp4_configure(link);
eb34d4af
TG		 3020 if (r < 0)
3021 return r;
eb34d4af
TG		 3022 }
3023
78c958f8 3024 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3025 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3026 if (r < 0)
3027 return r;
3028
3029 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3030 if (r < 0)
3031 return r;
dd43110f
TG		 3032 }
3033
62379e88
TG		 3034 if (link_dhcp6_enabled(link) ||
3035 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3036 r = dhcp6_configure(link);
3037 if (r < 0)
3038 return r;
3039 }
3040
3041 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3042 r = ndisc_configure(link);
4138fb2c
PF		 3043 if (r < 0)
3044 return r;
3045 }
3046
7465dd22
PF		 3047 if (link_radv_enabled(link)) {
3048 r = radv_configure(link);
3049 if (r < 0)
3050 return r;
3051 }
3052
8e1ad1ea 3053 if (link_lldp_rx_enabled(link)) {
7f853950 3054 r = link_lldp_rx_configure(link);
273eec24
LP		 3055 if (r < 0)
3056 return r;
ce43e484
SS		 3057 }
3058
f6fcc1c2 3059 r = link_configure_mtu(link);
40288ece
YW		 3060 if (r < 0)
3061 return r;
44b598a1 3062
9f6e82e6
YW		 3063 r = link_configure_addrgen_mode(link);
3064 if (r < 0)
3065 return r;
0e2fdb83 3066
051e77ca
SS		 3067 r = link_configure_ipv4_dad(link);
3068 if (r < 0)
3069 return r;
3070
3a390124
DS		 3071 return link_configure_continue(link);
3072}
3073
3074/* The configuration continues in this separate function, instead of
3075 * including this in the above link_configure() function, for two
3076 * reasons:
3077 * 1) some devices reset the link when the mtu is set, which caused
3078 * an infinite loop here in networkd; see:
3079 * https://github.com/systemd/systemd/issues/6593
3080 * https://github.com/systemd/systemd/issues/9831
3081 * 2) if ipv6ll is disabled, then bringing the interface up must be
3082 * delayed until after we get confirmation from the kernel that
3083 * the addr_gen_mode parameter has been set (via netlink), see:
3084 * https://github.com/systemd/systemd/issues/13882
3085 */
3086static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3087 int r;
3088
3089 assert(link);
3090 assert(link->network);
bd08ce56 3091 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3092
9524014e 3093 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3094 return 0;
3095
4c649652
DS		 3096 /* Drop foreign config, but ignore loopback or critical devices.
3097 * We do not want to remove loopback address or addresses used for root NFS. */
3098 if (!(link->flags & IFF_LOOPBACK) &&
3099 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3100 r = link_drop_foreign_config(link);
3101 if (r < 0)
3102 return r;
3103 }
3104
d236718c
DS		 3105 /* The kernel resets ipv6 mtu after changing device mtu;
3106 * we must set this here, after we've set device mtu */
3107 r = link_set_ipv6_mtu(link);
3108 if (r < 0)
3109 return r;
3110
dad2d78e 3111 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3112 r = link_acquire_conf(link);
3113 if (r < 0)
3114 return r;
cc544d5f 3115 }
1e9be60b 3116
3f265037 3117 return link_enter_join_netdev(link);
505f8da7
TG		 3118}
3119
27dfc982
YW		 3120static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3121 assert(duid);
3122
3123 if (duid->raw_data_len > 0)
3124 return 0;
3125
3126 if (duid->type != DUID_TYPE_UUID)
3127 return -EINVAL;
3128
3129 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3130 duid->raw_data_len = sizeof(sd_id128_t);
3131
3132 return 1;
3133}
3134
3135int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3136 Manager *manager = userdata;
3137 const sd_bus_error *e;
3138 const void *a;
3139 size_t sz;
3140 DUID *duid;
3141 Link *link;
3142 int r;
3143
3144 assert(m);
3145 assert(manager);
3146
3147 e = sd_bus_message_get_error(m);
3148 if (e) {
3149 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3150 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3151 e->message);
3152 goto configure;
3153 }
3154
3155 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3156 if (r < 0)
3157 goto configure;
3158
3159 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3160 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3161 goto configure;
3162 }
3163
3164 memcpy(&manager->product_uuid, a, sz);
3165 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3166 (void) duid_set_uuid(duid, manager->product_uuid);
3167
3168 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3169
3170configure:
3171 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3172 link_unref(link);
3173
27dfc982
YW		 3174 r = link_configure(link);
3175 if (r < 0)
4ff296b0 3176 link_enter_failed(link);
27dfc982
YW		 3177 }
3178
3179 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3180
3181 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3182 * even if the method fails. */
3183 manager->has_product_uuid = true;
3184
3185 return 1;
3186}
3187
3188static bool link_requires_uuid(Link *link) {
3189 const DUID *duid;
3190
3191 assert(link);
3192 assert(link->manager);
3193 assert(link->network);
3194
3195 duid = link_get_duid(link);
3196 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3197 return false;
3198
3199 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3200 return true;
3201
3202 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3203 return true;
3204
3205 return false;
3206}
3207
3208static int link_configure_duid(Link *link) {
3209 Manager *m;
3210 DUID *duid;
3211 int r;
3212
3213 assert(link);
3214 assert(link->manager);
3215 assert(link->network);
3216
3217 m = link->manager;
3218 duid = link_get_duid(link);
3219
3220 if (!link_requires_uuid(link))
3221 return 1;
3222
3223 if (m->has_product_uuid) {
3224 (void) duid_set_uuid(duid, m->product_uuid);
3225 return 1;
3226 }
3227
3228 if (!m->links_requesting_uuid) {
3229 r = manager_request_product_uuid(m, link);
3230 if (r < 0) {
3231 if (r == -ENOMEM)
3232 return r;
3233
ab4dd984
ZJS		 3234 log_link_warning_errno(link, r,
3235 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3236 return 1;
3237 }
3238 } else {
3239 r = set_put(m->links_requesting_uuid, link);
3240 if (r < 0)
3241 return log_oom();
39dbd0c7
ZJS		 3242 if (r > 0)
3243 link_ref(link);
27dfc982
YW		 3244
3245 r = set_put(m->duids_requesting_uuid, duid);
3246 if (r < 0)
3247 return log_oom();
3248 }
3249
3250 return 0;
3251}
3252
572b21d9 3253static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3254 Network *network;
3255 int r;
3256
572b21d9
YW		 3257 if (m) {
3258 _cleanup_strv_free_ char **s = NULL;
3259
3260 r = sd_netlink_message_get_errno(m);
3261 if (r < 0)
3262 return r;
3263
3264 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3265 if (r < 0 && r != -ENODATA)
3266 return r;
3267
3268 strv_free_and_replace(link->alternative_names, s);
3269 }
3270
c643bda5
YW		 3271 r = network_get(link->manager, link->iftype, link->sd_device,
3272 link->ifname, link->alternative_names, link->driver,
3273 &link->mac, &link->permanent_mac,
3274 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3275 if (r == -ENOENT) {
3276 link_enter_unmanaged(link);
3277 return 0;
3278 } else if (r == 0 && network->unmanaged) {
3279 link_enter_unmanaged(link);
3280 return 0;
3281 } else if (r < 0)
3282 return r;
3283
99b8517c 3284 if (link->network == network && !force)
ad932b15
YW		 3285 return 0;
3286
3287 log_link_info(link, "Re-configuring with %s", network->filename);
3288
3289 /* Dropping old .network file */
3290 r = link_stop_clients(link, false);
572b21d9 3291 if (r < 0)
ad932b15 3292 return r;
ad932b15
YW		 3293
3294 if (link_dhcp4_server_enabled(link))
3295 (void) sd_dhcp_server_stop(link->dhcp_server);
3296
3297 r = link_drop_config(link);
3298 if (r < 0)
3299 return r;
3300
2c7b826d 3301 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3302 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3303 r = link_drop_foreign_config(link);
3304 if (r < 0)
3305 return r;
3306 }
3307
3308 link_free_carrier_maps(link);
3309 link_free_engines(link);
3310 link->network = network_unref(link->network);
3311
3312 /* Then, apply new .network file */
3313 r = network_apply(network, link);
3314 if (r < 0)
3315 return r;
3316
3317 r = link_new_carrier_maps(link);
3318 if (r < 0)
3319 return r;
3320
3321 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3322 link_dirty(link);
ad932b15
YW		 3323
3324 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3325 * link_configure() is called later asynchronously. */
3326 r = link_configure_duid(link);
3327 if (r <= 0)
3328 return r;
3329
3330 r = link_configure(link);
3331 if (r < 0)
3332 return r;
3333
3334 return 0;
3335}
3336
572b21d9
YW		 3337static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3338 int r;
3339
3340 r = link_reconfigure_internal(link, m, false);
3341 if (r < 0)
3342 link_enter_failed(link);
3343
3344 return 1;
3345}
3346
3347static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3348 int r;
3349
3350 r = link_reconfigure_internal(link, m, true);
3351 if (r < 0)
3352 link_enter_failed(link);
3353
3354 return 1;
3355}
3356
3357int link_reconfigure(Link *link, bool force) {
3358 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3359 int r;
3360
2c0d7ed3
YW		 3361 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3362 return 0;
3363
572b21d9
YW		 3364 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3365 link->ifindex);
3366 if (r < 0)
3367 return r;
3368
3369 r = netlink_call_async(link->manager->rtnl, NULL, req,
3370 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3371 link_netlink_destroy_callback, link);
3372 if (r < 0)
3373 return r;
3374
3375 link_ref(link);
3376
3377 return 0;
3378}
3379
e6bf7774 3380static int link_initialized_and_synced(Link *link) {
505f8da7 3381 Network *network;
505f8da7
TG		 3382 int r;
3383
3384 assert(link);
3385 assert(link->ifname);
3386 assert(link->manager);
3387
bd08ce56
YW		 3388 /* We may get called either from the asynchronous netlink callback,
3389 * or directly for link_add() if running in a container. See link_add(). */
3390 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3391 return 0;
505f8da7 3392
6a7a4e4d 3393 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3394 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3395
0d4ad91d
AR		 3396 r = link_new_bound_by_list(link);
3397 if (r < 0)
3398 return r;
3399
3400 r = link_handle_bound_by_list(link);
3401 if (r < 0)
3402 return r;
3403
c4a03a56 3404 if (!link->network) {
0894cfe4 3405 r = wifi_get_info(link);
8d968fdd
YW		 3406 if (r < 0)
3407 return r;
3408
c643bda5
YW		 3409 r = network_get(link->manager, link->iftype, link->sd_device,
3410 link->ifname, link->alternative_names, link->driver,
3411 &link->mac, &link->permanent_mac,
3412 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3413 if (r == -ENOENT) {
3414 link_enter_unmanaged(link);
4232cf04 3415 return 0;
a09dc546
DM		 3416 } else if (r == 0 && network->unmanaged) {
3417 link_enter_unmanaged(link);
3418 return 0;
c4a03a56
TG		 3419 } else if (r < 0)
3420 return r;
505f8da7 3421
c4a03a56
TG		 3422 if (link->flags & IFF_LOOPBACK) {
3423 if (network->link_local != ADDRESS_FAMILY_NO)
3424 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3425
c4a03a56
TG		 3426 if (network->dhcp != ADDRESS_FAMILY_NO)
3427 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3428
c4a03a56
TG		 3429 if (network->dhcp_server)
3430 log_link_debug(link, "Ignoring DHCP server for loopback link");
3431 }
bd2efe92 3432
7d342c03 3433 r = network_apply(network, link);
c4a03a56
TG		 3434 if (r < 0)
3435 return r;
3436 }
505f8da7 3437
0d4ad91d
AR		 3438 r = link_new_bound_to_list(link);
3439 if (r < 0)
3440 return r;
3441
27dfc982
YW		 3442 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3443 * link_configure() is called later asynchronously. */
3444 r = link_configure_duid(link);
3445 if (r <= 0)
3446 return r;
3447
a748b692
TG		 3448 r = link_configure(link);
3449 if (r < 0)
3450 return r;
3451
4232cf04 3452 return 0;
505f8da7
TG		 3453}
3454
302a796f 3455static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3456 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3457 int r;
3458
572b21d9
YW		 3459 r = sd_netlink_message_get_errno(m);
3460 if (r < 0) {
40681e5c 3461 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3462 link_enter_failed(link);
3463 return 0;
3464 }
3465
3466 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3467 if (r < 0 && r != -ENODATA) {
3468 link_enter_failed(link);
3469 return 0;
3470 }
3471
3472 strv_free_and_replace(link->alternative_names, s);
3473
4ff296b0
YW		 3474 r = link_initialized_and_synced(link);
3475 if (r < 0)
3476 link_enter_failed(link);
e6bf7774
YW		 3477 return 1;
3478}
3479
51517f9e 3480int link_initialized(Link *link, sd_device *device) {
4afd3348 3481 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3482 int r;
3483
3484 assert(link);
3485 assert(link->manager);
3486 assert(link->manager->rtnl);
3487 assert(device);
3488
8434fd5c 3489 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3490 return 0;
3491
51517f9e 3492 if (link->sd_device)
679b3605
TG		 3493 return 0;
3494
79008bdd 3495 log_link_debug(link, "udev initialized link");
bd08ce56 3496 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3497
51517f9e 3498 link->sd_device = sd_device_ref(device);
4f561e8e 3499
3c9b8860
TG		 3500 /* udev has initialized the link, but we don't know if we have yet
3501 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3502 * when it returns we know that the pending NEWLINKs have already been
3503 * processed and that we are up-to-date */
4f561e8e 3504
3c9b8860
TG		 3505 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3506 link->ifindex);
4f561e8e
TG		 3507 if (r < 0)
3508 return r;
3509
302a796f
YW		 3510 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3511 link_netlink_destroy_callback, link);
4f561e8e
TG		 3512 if (r < 0)
3513 return r;
3514
5da8149f
TG		 3515 link_ref(link);
3516
4f561e8e
TG		 3517 return 0;
3518}
3519
c4a03a56 3520static int link_load(Link *link) {
0bc70f1d
TG		 3521 _cleanup_free_ char *network_file = NULL,
3522 *addresses = NULL,
f703cc2c 3523 *routes = NULL,
0bc70f1d
TG		 3524 *dhcp4_address = NULL,
3525 *ipv4ll_address = NULL;
3526 union in_addr_union address;
c4a03a56
TG		 3527 int r;
3528
3529 assert(link);
3530
aa8fbc74 3531 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3532 "NETWORK_FILE", &network_file,
3533 "ADDRESSES", &addresses,
f703cc2c 3534 "ROUTES", &routes,
0bc70f1d 3535 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3536 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3537 if (r < 0 && r != -ENOENT)
3538 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3539
3540 if (network_file) {
3541 Network *network;
3542 char *suffix;
3543
3544 /* drop suffix */
3545 suffix = strrchr(network_file, '.');
3546 if (!suffix) {
3547 log_link_debug(link, "Failed to get network name from %s", network_file);
3548 goto network_file_fail;
3549 }
3550 *suffix = '\0';
3551
3552 r = network_get_by_name(link->manager, basename(network_file), &network);
3553 if (r < 0) {
3554 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3555 goto network_file_fail;
3556 }
3557
7d342c03 3558 r = network_apply(network, link);
c4a03a56
TG		 3559 if (r < 0)
3560 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3561 }
3562
3563network_file_fail:
3564
1f68f772
ZJS		 3565 for (const char *p = addresses; p; ) {
3566 _cleanup_free_ char *address_str = NULL;
3567 char *prefixlen_str;
3568 int family;
3569 unsigned char prefixlen;
c4a03a56 3570
1f68f772
ZJS		 3571 r = extract_first_word(&p, &address_str, NULL, 0);
3572 if (r < 0)
3573 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3574 if (r <= 0)
3575 break;
c4a03a56 3576
1f68f772
ZJS		 3577 prefixlen_str = strchr(address_str, '/');
3578 if (!prefixlen_str) {
3579 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3580 continue;
3581 }
3582 *prefixlen_str++ = '\0';
c4a03a56 3583
1f68f772
ZJS		 3584 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3585 if (r != 1) {
3586 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3587 continue;
3588 }
c4a03a56 3589
1f68f772
ZJS		 3590 r = in_addr_from_string_auto(address_str, &family, &address);
3591 if (r < 0) {
3592 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3593 continue;
c4a03a56 3594 }
c4a03a56 3595
1f68f772
ZJS		 3596 r = address_add(link, family, &address, prefixlen, NULL);
3597 if (r < 0)
3598 return log_link_error_errno(link, r, "Failed to add address: %m");
3599 }
74544b4e 3600
1f68f772
ZJS		 3601 for (const char *p = routes; p; ) {
3602 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3603 _cleanup_(route_freep) Route *tmp = NULL;
3604 _cleanup_free_ char *route_str = NULL;
3605 char *prefixlen_str;
3606 Route *route;
f703cc2c 3607
1f68f772
ZJS		 3608 r = extract_first_word(&p, &route_str, NULL, 0);
3609 if (r < 0)
3610 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3611 if (r <= 0)
3612 break;
c598ac76 3613
1f68f772
ZJS		 3614 prefixlen_str = strchr(route_str, '/');
3615 if (!prefixlen_str) {
3616 log_link_debug(link, "Failed to parse route %s", route_str);
3617 continue;
3618 }
3619 *prefixlen_str++ = '\0';
f703cc2c 3620
1f68f772
ZJS		 3621 r = route_new(&tmp);
3622 if (r < 0)
3623 return log_oom();
f703cc2c 3624
1f68f772
ZJS		 3625 r = sscanf(prefixlen_str,
3626 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3627 &tmp->dst_prefixlen,
3628 &tmp->tos,
3629 &tmp->priority,
3630 &tmp->table,
3631 &tmp->lifetime);
3632 if (r != 5) {
3633 log_link_debug(link,
3634 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3635 prefixlen_str);
3636 continue;
3637 }
f1368755 3638
1f68f772
ZJS		 3639 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3640 if (r < 0) {
3641 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3642 continue;
3643 }
f703cc2c 3644
1f68f772
ZJS		 3645 r = route_add(link, tmp, &route);
3646 if (r < 0)
3647 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3648
1f68f772
ZJS		 3649 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3650 r = sd_event_add_time(link->manager->event, &expire,
3651 clock_boottime_or_monotonic(),
3652 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3653 if (r < 0)
1f68f772 3654 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3655 }
1f68f772
ZJS		 3656
3657 sd_event_source_unref(route->expire);
3658 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3659 }
3660
0bc70f1d
TG		 3661 if (dhcp4_address) {
3662 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3663 if (r < 0) {
b68d26b8 3664 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3665 goto dhcp4_address_fail;
3666 }
3667
b1c626f6 3668 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3669 if (r < 0)
b68d26b8 3670 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3671
1b43e246
DS		 3672 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3673 if (r < 0)
3674 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3675
0bc70f1d
TG		 3676 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3677 if (r < 0)
b68d26b8 3678 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3679 }
3680
3681dhcp4_address_fail:
3682
3683 if (ipv4ll_address) {
3684 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3685 if (r < 0) {
b68d26b8 3686 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3687 goto ipv4ll_address_fail;
3688 }
3689
3690 r = sd_ipv4ll_new(&link->ipv4ll);
3691 if (r < 0)
b68d26b8 3692 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3693
1b43e246
DS		 3694 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3695 if (r < 0)
3696 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3697
0bc70f1d
TG		 3698 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3699 if (r < 0)
b68d26b8 3700 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3701 }
3702
3703ipv4ll_address_fail:
3704
c4a03a56
TG		 3705 return 0;
3706}
3707
1c4baffc 3708int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3709 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3710 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3711 Link *link;
5a937ea2 3712 int r;
505f8da7
TG		 3713
3714 assert(m);
fbbeb65a 3715 assert(m->rtnl);
505f8da7
TG		 3716 assert(message);
3717 assert(ret);
3718
3719 r = link_new(m, message, ret);
3720 if (r < 0)
3721 return r;
3722
3723 link = *ret;
3724
6a7a4e4d 3725 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3726
c4a03a56
TG		 3727 r = link_load(link);
3728 if (r < 0)
3729 return r;
3730
bf331d87
YW		 3731 if (path_is_read_only_fs("/sys") <= 0) {
3732 /* udev should be around */
ae06ab10 3733 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3734 r = sd_device_new_from_device_id(&device, ifindex_str);
3735 if (r < 0) {
4d59e14f
YW		 3736 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3737 return 0;
5c416fc4 3738 }
505f8da7 3739
5a937ea2 3740 r = sd_device_get_is_initialized(device);
51517f9e 3741 if (r < 0) {
bf331d87 3742 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3743 goto failed;
3744 }
5a937ea2 3745 if (r == 0) {
505f8da7 3746 /* not yet ready */
79008bdd 3747 log_link_debug(link, "link pending udev initialization...");
505f8da7 3748 return 0;
3c4cb064 3749 }
505f8da7 3750
299ad32d
YW		 3751 r = device_is_renaming(device);
3752 if (r < 0) {
bf331d87 3753 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3754 goto failed;
3755 }
3756 if (r > 0) {
bf331d87 3757 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3758 return 0;
3759 }
3760
4f561e8e
TG		 3761 r = link_initialized(link, device);
3762 if (r < 0)
5c416fc4 3763 goto failed;
4f561e8e 3764 } else {
e6bf7774 3765 r = link_initialized_and_synced(link);
4f561e8e 3766 if (r < 0)
5c416fc4 3767 goto failed;
4f561e8e 3768 }
505f8da7 3769
a748b692 3770 return 0;
5c416fc4
TG		 3771failed:
3772 link_enter_failed(link);
3773 return r;
a748b692
TG		 3774}
3775
c601ebf7 3776int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3777 int r;
3778
3779 assert(link);
3780
3781 log_link_info(link, "Gained IPv6LL");
3782
c601ebf7 3783 link->ipv6ll_address = *address;
e7ab854c
TG		 3784 link_check_ready(link);
3785
b9ea3d2e 3786 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3787 r = link_acquire_ipv6_conf(link);
3788 if (r < 0) {
3789 link_enter_failed(link);
3790 return r;
3791 }
3792 }
3793
3794 return 0;
3795}
3796
9c0a72f9
TG		 3797static int link_carrier_gained(Link *link) {
3798 int r;
3799
3800 assert(link);
3801
0894cfe4 3802 r = wifi_get_info(link);
8d968fdd
YW		 3803 if (r < 0)
3804 return r;
3805 if (r > 0) {
572b21d9
YW		 3806 r = link_reconfigure_internal(link, NULL, false);
3807 if (r < 0) {
3808 link_enter_failed(link);
8d968fdd 3809 return r;
572b21d9 3810 }
8d968fdd
YW		 3811 }
3812
b9ea3d2e 3813 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3814 r = link_acquire_conf(link);
3815 if (r < 0) {
3816 link_enter_failed(link);
3817 return r;
3818 }
6fc25497 3819
b425c3ae 3820 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3821 r = link_request_set_addresses(link);
6fc25497
SS		 3822 if (r < 0)
3823 return r;
9c0a72f9
TG		 3824 }
3825
0d4ad91d
AR		 3826 r = link_handle_bound_by_list(link);
3827 if (r < 0)
3828 return r;
3829
1f241589
YW		 3830 if (!link->bridge_mdb_configured) {
3831 r = link_set_bridge_mdb(link);
3832 if (r < 0)
3833 return r;
3834 }
3835
3836 if (streq_ptr(link->kind, "bridge")) {
3837 Link *slave;
3838
3839 SET_FOREACH(slave, link->slaves) {
3840 if (slave->bridge_mdb_configured)
3841 continue;
3842
3843 r = link_set_bridge_mdb(slave);
3844 if (r < 0)
3845 link_enter_failed(slave);
3846 }
3847 }
3db468ea 3848
9c0a72f9
TG		 3849 return 0;
3850}
3851
3852static int link_carrier_lost(Link *link) {
3853 int r;
3854
3855 assert(link);
3856
25e992ba 3857 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3858 return 0;
3859
fbdb6605 3860 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3861 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3862 * configuration and stop the clients as well. */
97e7fb39
SS		 3863 if (link->setting_mtu)
3864 return 0;
3865
95355a28 3866 r = link_stop_clients(link, false);
9c0a72f9
TG		 3867 if (r < 0) {
3868 link_enter_failed(link);
3869 return r;
3870 }
3871
28464ae0
SS		 3872 if (link_dhcp4_server_enabled(link))
3873 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3874
3104883d
SS		 3875 r = link_drop_config(link);
3876 if (r < 0)
3877 return r;
3878
2c7b826d 3879 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3880 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3881 r = link_drop_foreign_config(link);
3882 if (r < 0)
3883 return r;
3884 }
3104883d 3885
0d4ad91d
AR		 3886 r = link_handle_bound_by_list(link);
3887 if (r < 0)
3888 return r;
3889
9c0a72f9
TG		 3890 return 0;
3891}
3892
3893int link_carrier_reset(Link *link) {
3894 int r;
3895
3896 assert(link);
3897
3898 if (link_has_carrier(link)) {
3899 r = link_carrier_lost(link);
3900 if (r < 0)
3901 return r;
3902
3903 r = link_carrier_gained(link);
3904 if (r < 0)
3905 return r;
3906
6a7a4e4d 3907 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3908 }
3909
3910 return 0;
3911}
3912
d236718c
DS		 3913/* This is called every time an interface admin state changes to up;
3914 * specifically, when IFF_UP flag changes from unset to set */
3915static int link_admin_state_up(Link *link) {
3916 int r;
3917
3918 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3919 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3920 * ipv6_mtu_set prevents this from trying to set it too early before
3921 * the link->network has been setup; we only need to reset it
3922 * here if we've already set it during normal initialization. */
3923 if (link->ipv6_mtu_set) {
3924 r = link_set_ipv6_mtu(link);
3925 if (r < 0)
3926 return r;
3927 }
3928
3929 return 0;
3930}
3931
1c4baffc 3932int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3933 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3934 struct ether_addr mac;
ca4e095a 3935 const char *ifname;
afe7fd56 3936 uint32_t mtu;
d236718c 3937 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3938 int old_master, r;
22936833 3939
dd3efc09 3940 assert(link);
b8941f74 3941 assert(link->ifname);
22936833
TG		 3942 assert(m);
3943
7619683b 3944 if (link->state == LINK_STATE_LINGER) {
5238e957 3945 log_link_info(link, "Link re-added");
289e6774 3946 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3947
3948 r = link_new_carrier_maps(link);
3949 if (r < 0)
3950 return r;
7619683b
TG		 3951 }
3952
1c4baffc 3953 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3954 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3955 Manager *manager = link->manager;
b8941f74 3956
30de2b89 3957 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3958
30de2b89
YW		 3959 link_drop(link);
3960 r = link_add(manager, m, &link);
3961 if (r < 0)
3962 return r;
b8941f74
TG		 3963 }
3964
572b21d9
YW		 3965 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3966 if (r >= 0)
3967 strv_free_and_replace(link->alternative_names, s);
3968
1c4baffc 3969 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3970 if (r >= 0 && mtu > 0) {
3971 link->mtu = mtu;
4e964aa0 3972 if (link->original_mtu == 0) {
afe7fd56 3973 link->original_mtu = mtu;
6a7a4e4d 3974 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3975 }
3976
3977 if (link->dhcp_client) {
3c9b8860
TG		 3978 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3979 link->mtu);
fc95c359
YW		 3980 if (r < 0)
3981 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3982 }
7465dd22
PF		 3983
3984 if (link->radv) {
3985 r = sd_radv_set_mtu(link->radv, link->mtu);
3986 if (r < 0)
3987 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3988 }
9842de0d 3989 }
69629de9 3990
e9189a1f
TG		 3991 /* The kernel may broadcast NEWLINK messages without the MAC address
3992 set, simply ignore them. */
1c4baffc 3993 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 3994 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3995
3996 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3997
3998 log_link_debug(link, "Gained new MAC address: "
3999 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
4000 mac.ether_addr_octet[0],
4001 mac.ether_addr_octet[1],
4002 mac.ether_addr_octet[2],
4003 mac.ether_addr_octet[3],
4004 mac.ether_addr_octet[4],
4005 mac.ether_addr_octet[5]);
4006
4007 if (link->ipv4ll) {
4008 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
4009
4010 if (restart) {
4011 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 4012 if (r < 0)
807667f7 4013 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 4014 }
c49b33ac 4015
807667f7
YW		 4016 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
4017 if (r < 0)
4018 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
4019
4020 if (restart) {
4021 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 4022 if (r < 0)
807667f7
YW		 4023 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
4024 }
4025 }
4026
4027 if (link->dhcp_client) {
4028 r = sd_dhcp_client_set_mac(link->dhcp_client,
4029 (const uint8_t *) &link->mac,
4030 sizeof (link->mac),
4031 ARPHRD_ETHER);
4032 if (r < 0)
4033 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
4034
4035 r = dhcp4_set_client_identifier(link);
4036 if (r < 0)
4037 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
4038 }
413708d1 4039
807667f7
YW		 4040 if (link->dhcp6_client) {
4041 const DUID* duid = link_get_duid(link);
4042 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
4043
4044 if (restart) {
4045 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 4046 if (r < 0)
807667f7 4047 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 4048 }
4138fb2c 4049
807667f7
YW		 4050 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
4051 (const uint8_t *) &link->mac,
4052 sizeof (link->mac),
4053 ARPHRD_ETHER);
4054 if (r < 0)
4055 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 4056
807667f7
YW		 4057 if (link->network->iaid_set) {
4058 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 4059 if (r < 0)
807667f7
YW		 4060 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
4061 }
4062
4063 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
4064 duid->type,
4065 duid->raw_data_len > 0 ? duid->raw_data : NULL,
4066 duid->raw_data_len);
4067 if (r < 0)
4068 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4069
4070 if (restart) {
4071 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 4072 if (r < 0)
807667f7 4073 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 4074 }
807667f7 4075 }
7465dd22 4076
807667f7
YW		 4077 if (link->radv) {
4078 bool restart = sd_radv_is_running(link->radv);
4079
4080 if (restart) {
4081 r = sd_radv_stop(link->radv);
7465dd22 4082 if (r < 0)
807667f7 4083 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 4084 }
420d2058 4085
807667f7
YW		 4086 r = sd_radv_set_mac(link->radv, &link->mac);
4087 if (r < 0)
4088 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
4089
4090 if (restart) {
4091 r = sd_radv_start(link->radv);
420d2058 4092 if (r < 0)
807667f7 4093 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 4094 }
c49b33ac 4095 }
807667f7
YW		 4096
4097 if (link->ndisc) {
4098 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4099 if (r < 0)
4100 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
4101 }
4f882b2a
TG		 4102 }
4103
bb262ef0
YW		 4104 old_master = link->master_ifindex;
4105 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4106
d236718c 4107 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 4108 had_carrier = link_has_carrier(link);
4109
bb262ef0 4110 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 4111 if (r < 0)
4112 return r;
4113
d236718c
DS		 4114 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4115 log_link_info(link, "Link UP");
4116
4117 r = link_admin_state_up(link);
4118 if (r < 0)
4119 return r;
4120 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4121 log_link_info(link, "Link DOWN");
4122
273eec24
LP		 4123 r = link_update_lldp(link);
4124 if (r < 0)
4125 return r;
4126
a61bb41c
TG		 4127 carrier_gained = !had_carrier && link_has_carrier(link);
4128 carrier_lost = had_carrier && !link_has_carrier(link);
4129
4130 if (carrier_gained) {
6a7a4e4d 4131 log_link_info(link, "Gained carrier");
a61bb41c 4132
9c0a72f9
TG		 4133 r = link_carrier_gained(link);
4134 if (r < 0)
4135 return r;
a61bb41c 4136 } else if (carrier_lost) {
6a7a4e4d 4137 log_link_info(link, "Lost carrier");
a61bb41c 4138
9c0a72f9
TG		 4139 r = link_carrier_lost(link);
4140 if (r < 0)
a61bb41c 4141 return r;
a61bb41c
TG		 4142 }
4143
4144 return 0;
dd3efc09 4145}
fe8db0c5 4146
b295beea
LP		 4147static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4148 bool space = false;
b295beea
LP		 4149 Link *link;
4150
4151 assert(f);
4152 assert(prefix);
4153
4154 if (hashmap_isempty(h))
4155 return;
4156
0d536673 4157 fputs(prefix, f);
90e74a66 4158 HASHMAP_FOREACH(link, h) {
b295beea 4159 if (space)
0d536673 4160 fputc(' ', f);
b295beea
LP		 4161
4162 fprintf(f, "%i", link->ifindex);
4163 space = true;
4164 }
4165
0d536673 4166 fputc('\n', f);
b295beea
LP		 4167}
4168
64581765 4169static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 4170 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 4171 const char *str;
15761549 4172
64581765
YW		 4173 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
4174 continue;
4175
e77bd3fd
YW		 4176 str = in_addr_full_to_string(dns[j]);
4177 if (!str)
15761549 4178 continue;
15761549
YW		 4179
4180 if (*space)
4181 fputc(' ', f);
e77bd3fd 4182 fputs(str, f);
15761549
YW		 4183 *space = true;
4184 }
4185}
4186
d5e172d2
ZJS		 4187static void serialize_addresses(
4188 FILE *f,
4189 const char *lvalue,
4190 bool *space,
4191 char **addresses,
4192 sd_dhcp_lease *lease,
4193 bool conditional,
ddb82ec2 4194 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4195 sd_dhcp6_lease *lease6,
4196 bool conditional6,
4197 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4198 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4199 int r;
4200
4201 bool _space = false;
4202 if (!space)
4203 space = &_space;
4204
4205 if (lvalue)
4206 fprintf(f, "%s=", lvalue);
4207 fputstrv(f, addresses, NULL, space);
4208
4209 if (lease && conditional) {
4210 const struct in_addr *lease_addresses;
4211
4212 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4213 if (r > 0)
d8bff5cc 4214 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4215 }
4216
4217 if (lease6 && conditional6 && lease6_get_addr) {
4218 const struct in6_addr *in6_addrs;
4219
4220 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4221 if (r > 0)
4222 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4223 }
4224
4225 if (lease6 && conditional6 && lease6_get_fqdn) {
4226 char **in6_hosts;
4227
4228 r = lease6_get_fqdn(lease6, &in6_hosts);
4229 if (r > 0)
4230 fputstrv(f, in6_hosts, NULL, space);
4231 }
4232
4233 if (lvalue)
4234 fputc('\n', f);
4235}
4236
fe8db0c5 4237int link_save(Link *link) {
d361b373 4238 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4239 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4240 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4241 Route *route;
18d8a2cf 4242 Address *a;
fe8db0c5
TG		 4243 int r;
4244
4245 assert(link);
4246 assert(link->state_file);
68a8723c 4247 assert(link->lease_file);
bbf7c048
TG		 4248 assert(link->manager);
4249
370e9930 4250 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4251 (void) unlink(link->state_file);
370e9930
TG		 4252 return 0;
4253 }
4254
34437b4f
LP		 4255 link_lldp_save(link);
4256
deb2e523
TG		 4257 admin_state = link_state_to_string(link->state);
4258 assert(admin_state);
4259
e375dcde
TG		 4260 oper_state = link_operstate_to_string(link->operstate);
4261 assert(oper_state);
deb2e523 4262
ac999bf0
YW		 4263 carrier_state = link_carrier_state_to_string(link->carrier_state);
4264 assert(carrier_state);
4265
4266 address_state = link_address_state_to_string(link->address_state);
4267 assert(address_state);
4268
fe8db0c5
TG		 4269 r = fopen_temporary(link->state_file, &f, &temp_path);
4270 if (r < 0)
6a7a4e4d 4271 goto fail;
fe8db0c5 4272
5512a963 4273 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4274
4275 fprintf(f,
4276 "# This is private data. Do not parse.\n"
deb2e523 4277 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4278 "OPER_STATE=%s\n"
4279 "CARRIER_STATE=%s\n"
4280 "ADDRESS_STATE=%s\n",
4281 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4282
bcb7a07e 4283 if (link->network) {
fe0e16db
YW		 4284 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4285 const char *dhcp_domainname = NULL, *p;
fe0e16db 4286 bool space;
07bdc70d 4287
c1a38904
MTL		 4288 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4289 yes_no(link->network->required_for_online));
4290
d5e172d2
ZJS		 4291 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4292 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4293 strempty(link_operstate_to_string(st.min)),
4294 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4295 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4296
adc5b2e2
TG		 4297 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4298
d5e172d2
ZJS		 4299 /************************************************************/
4300
0d536673 4301 fputs("DNS=", f);
ea352b40 4302 space = false;
15761549 4303 if (link->n_dns != (unsigned) -1)
64581765 4304 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 4305 else
64581765 4306 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 4307
d5e172d2
ZJS		 4308 serialize_addresses(f, NULL, &space,
4309 NULL,
4310 link->dhcp_lease,
4311 link->network->dhcp_use_dns,
ddb82ec2 4312 SD_DHCP_LEASE_DNS,
1633c457 4313 link->dhcp6_lease,
d5e172d2
ZJS		 4314 link->network->dhcp6_use_dns,
4315 sd_dhcp6_lease_get_dns,
4316 NULL);
1e7a0e21 4317
a8c10331 4318 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 4319 ndisc_vacuum(link);
4320
b296797f 4321 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4322 NDiscRDNSS *dd;
4323
90e74a66 4324 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 4325 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4326 }
4327
4328 fputc('\n', f);
4329
d5e172d2
ZJS		 4330 /************************************************************/
4331
4332 serialize_addresses(f, "NTP", NULL,
4333 link->ntp ?: link->network->ntp,
4334 link->dhcp_lease,
4335 link->network->dhcp_use_ntp,
ddb82ec2 4336 SD_DHCP_LEASE_NTP,
1633c457 4337 link->dhcp6_lease,
d5e172d2
ZJS		 4338 link->network->dhcp6_use_ntp,
4339 sd_dhcp6_lease_get_ntp_addrs,
4340 sd_dhcp6_lease_get_ntp_fqdn);
4341
4342 serialize_addresses(f, "SIP", NULL,
2a71d57f 4343 NULL,
d5e172d2
ZJS		 4344 link->dhcp_lease,
4345 link->network->dhcp_use_sip,
ddb82ec2 4346 SD_DHCP_LEASE_SIP,
2a71d57f 4347 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4348
4349 /************************************************************/
bd8f6538 4350
b2a81c0b 4351 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4352 if (link->dhcp_lease) {
b2a81c0b 4353 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4354 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4355 }
1633c457
YW		 4356 if (link->dhcp6_lease)
4357 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4358 }
4359
fe0e16db
YW		 4360 fputs("DOMAINS=", f);
4361 space = false;
90e74a66 4362 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 4363 fputs_with_space(f, p, NULL, &space);
07bdc70d 4364
1e7a0e21 4365 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4366 if (dhcp_domainname)
4367 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4368 if (dhcp_domains)
4369 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4370 if (dhcp6_domains)
4371 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4372 }
4373
4374 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4375 NDiscDNSSL *dd;
1e7a0e21 4376
90e74a66 4377 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4378 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4379 }
b2a81c0b 4380
0d536673 4381 fputc('\n', f);
6192b846 4382
d5e172d2
ZJS		 4383 /************************************************************/
4384
fe0e16db
YW		 4385 fputs("ROUTE_DOMAINS=", f);
4386 space = false;
90e74a66 4387 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 4388 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4389
1e7a0e21 4390 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4391 if (dhcp_domainname)
4392 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4393 if (dhcp_domains)
4394 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4395 if (dhcp6_domains)
4396 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4397 }
4398
4399 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4400 NDiscDNSSL *dd;
1e7a0e21 4401
90e74a66 4402 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4403 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4404 }
b2a81c0b 4405
0d536673 4406 fputc('\n', f);
67272d15 4407
d5e172d2
ZJS		 4408 /************************************************************/
4409
3c9b8860 4410 fprintf(f, "LLMNR=%s\n",
15761549 4411 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4412
4413 /************************************************************/
4414
aaa297d4 4415 fprintf(f, "MDNS=%s\n",
15761549 4416 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4417
d5e172d2
ZJS		 4418 /************************************************************/
4419
4420 int dns_default_route =
4421 link->dns_default_route >= 0 ? link->dns_default_route :
4422 link->network->dns_default_route;
4423 if (dns_default_route >= 0)
4424 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4425
4426 /************************************************************/
4427
4428 DnsOverTlsMode dns_over_tls_mode =
4429 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4430 link->network->dns_over_tls_mode;
4431 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4432 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4433
4434 /************************************************************/
4435
4436 DnssecMode dnssec_mode =
4437 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4438 link->network->dnssec_mode;
4439 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4440 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4441
4442 /************************************************************/
4443
4444 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4445 if (set_isempty(nta_anchors))
4446 nta_anchors = link->network->dnssec_negative_trust_anchors;
4447
4448 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4449 const char *n;
4450
0d536673 4451 fputs("DNSSEC_NTA=", f);
8a516214 4452 space = false;
90e74a66 4453 SET_FOREACH(n, nta_anchors)
d390f8ef 4454 fputs_with_space(f, n, NULL, &space);
0d536673 4455 fputc('\n', f);
8a516214
LP		 4456 }
4457
d5e172d2
ZJS		 4458 /************************************************************/
4459
0d536673 4460 fputs("ADDRESSES=", f);
e7780c8d 4461 space = false;
90e74a66 4462 SET_FOREACH(a, link->addresses) {
e7780c8d
TG		 4463 _cleanup_free_ char *address_str = NULL;
4464
4465 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4466 if (r < 0)
4467 goto fail;
4468
e7780c8d
TG		 4469 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4470 space = true;
4471 }
0d536673 4472 fputc('\n', f);
c1eb9872 4473
d5e172d2
ZJS		 4474 /************************************************************/
4475
0d536673 4476 fputs("ROUTES=", f);
c1eb9872 4477 space = false;
90e74a66 4478 SET_FOREACH(route, link->routes) {
c1eb9872
TG		 4479 _cleanup_free_ char *route_str = NULL;
4480
4481 r = in_addr_to_string(route->family, &route->dst, &route_str);
4482 if (r < 0)
4483 goto fail;
4484
ecc3f340
ZJS		 4485 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4486 space ? " " : "", route_str,
f833694d 4487 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4488 space = true;
4489 }
4490
0d536673 4491 fputc('\n', f);
bcb7a07e 4492 }
7374f9d8 4493
b295beea
LP		 4494 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4495 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4496
8eb9058d 4497 if (link->dhcp_lease) {
bd91b83e 4498 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4499 if (r < 0)
c2d6bd61 4500 goto fail;
fe8db0c5 4501
7374f9d8 4502 fprintf(f,
b0e39c82
TG		 4503 "DHCP_LEASE=%s\n",
4504 link->lease_file);
deb2e523 4505 } else
6990fb6b 4506 (void) unlink(link->lease_file);
fe8db0c5 4507
0bc70f1d
TG		 4508 if (link->ipv4ll) {
4509 struct in_addr address;
4510
4511 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4512 if (r >= 0) {
0d536673 4513 fputs("IPV4LL_ADDRESS=", f);
072320ea 4514 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4515 fputc('\n', f);
0bc70f1d
TG		 4516 }
4517 }
4518
7e738e7b
SS		 4519 if (link->dhcp6_client) {
4520 _cleanup_free_ char *duid = NULL;
4521 uint32_t iaid;
4522
4523 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4524 if (r >= 0)
4525 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4526
4527 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4528 if (r >= 0)
4529 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4530 }
18d8a2cf 4531
c2d6bd61
LP		 4532 r = fflush_and_check(f);
4533 if (r < 0)
4534 goto fail;
fe8db0c5 4535
c2d6bd61 4536 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4537 r = -errno;
c2d6bd61 4538 goto fail;
fe8db0c5
TG		 4539 }
4540
c2d6bd61 4541 return 0;
dacd6cee 4542
c2d6bd61 4543fail:
6a7a4e4d 4544 (void) unlink(link->state_file);
6a7a4e4d
LP		 4545 if (temp_path)
4546 (void) unlink(temp_path);
4547
dacd6cee 4548 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4549}
4550
84de38c5
TG		 4551/* The serialized state in /run is no longer up-to-date. */
4552void link_dirty(Link *link) {
4553 int r;
4554
4555 assert(link);
4556
0c241a37
SS		 4557 /* mark manager dirty as link is dirty */
4558 manager_dirty(link->manager);
4559
de7fef4b 4560 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4561 if (r <= 0)
de7fef4b 4562 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4563 return;
84de38c5
TG		 4564 link_ref(link);
4565}
4566
4567/* The serialized state in /run is up-to-date */
4568void link_clean(Link *link) {
4569 assert(link);
4570 assert(link->manager);
4571
1046bf9b 4572 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4573}
4574
c2a65950
YW		 4575int link_save_and_clean(Link *link) {
4576 int r;
4577
4578 r = link_save(link);
4579 if (r < 0)
4580 return r;
4581
4582 link_clean(link);
4583 return 0;
4584}
4585
fe8db0c5 4586static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4587 [LINK_STATE_PENDING] = "pending",
bd08ce56 4588 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4589 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4590 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4591 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4592 [LINK_STATE_FAILED] = "failed",
370e9930 4593 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4594};
4595
4596DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4597
4598int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4599 const char *err_msg = NULL;
4600
4601 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 4602 return log_link_full_errno(link, level, err,
4603 "%s: %s%s%s%m",
4604 msg,
4605 strempty(err_msg),
4606 err_msg && !endswith(err_msg, ".") ? "." : "",
4607 err_msg ? " " : "");
5ecb131d 4608}
Unnamed repository; edit this file 'description' to name the repository.