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Merge pull request #16219 from ssahani/network-sr-iov
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
3ddcbeea 23#include "networkd-can.h"
8fcf1d61 24#include "networkd-dhcp-server.h"
ca5ad760
YW		 25#include "networkd-dhcp4.h"
26#include "networkd-dhcp6.h"
27#include "networkd-ipv4ll.h"
a0e5c15d 28#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 29#include "networkd-link-bus.h"
30#include "networkd-link.h"
8e1ad1ea 31#include "networkd-lldp-tx.h"
23f53b99 32#include "networkd-manager.h"
1e7a0e21 33#include "networkd-ndisc.h"
e4a71bf3 34#include "networkd-neighbor.h"
518cd6b5 35#include "networkd-sriov.h"
7465dd22 36#include "networkd-radv.h"
bce67bbe 37#include "networkd-routing-policy-rule.h"
8d968fdd 38#include "networkd-wifi.h"
cf1d700d
TG		 39#include "set.h"
40#include "socket-util.h"
bf331d87 41#include "stat-util.h"
15a5e950 42#include "stdio-util.h"
8b43440b 43#include "string-table.h"
51517f9e 44#include "strv.h"
62e021a9 45#include "sysctl-util.h"
34658df2 46#include "tc.h"
e4de7287 47#include "tmpfile-util.h"
299ad32d 48#include "udev-util.h"
cf1d700d 49#include "util.h"
737f1405 50#include "vrf.h"
fc2f9534 51
bdb9f580
YW		 52uint32_t link_get_vrf_table(Link *link) {
53 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
54}
55
56uint32_t link_get_dhcp_route_table(Link *link) {
57 /* When the interface is part of an VRF use the VRFs routing table, unless
58 * another table is explicitly specified. */
59 if (link->network->dhcp_route_table_set)
60 return link->network->dhcp_route_table;
61 return link_get_vrf_table(link);
62}
63
64uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
65 if (link->network->ipv6_accept_ra_route_table_set)
66 return link->network->ipv6_accept_ra_route_table;
67 return link_get_vrf_table(link);
68}
69
f24648a6
YW		 70DUID* link_get_duid(Link *link) {
71 if (link->network->duid.type != _DUID_TYPE_INVALID)
72 return &link->network->duid;
73 else
74 return &link->manager->duid;
75}
76
b9d74c40
LP		 77static bool link_dhcp6_enabled(Link *link) {
78 assert(link);
79
fa709992
LP		 80 if (!socket_ipv6_is_supported())
81 return false;
82
78c958f8
TG		 83 if (link->flags & IFF_LOOPBACK)
84 return false;
85
86 if (!link->network)
87 return false;
88
f2bfcdb9
YW		 89 if (link->network->bond)
90 return false;
91
500b96eb 92 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 93 return false;
94
e0ee46f2 95 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 96}
97
b9d74c40
LP		 98static bool link_dhcp4_enabled(Link *link) {
99 assert(link);
100
78c958f8
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
500b96eb 110 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 111 return false;
112
e0ee46f2 113 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 114}
115
b9d74c40
LP		 116static bool link_dhcp4_server_enabled(Link *link) {
117 assert(link);
118
78c958f8
TG		 119 if (link->flags & IFF_LOOPBACK)
120 return false;
121
122 if (!link->network)
123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
500b96eb 128 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 129 return false;
130
78c958f8
TG		 131 return link->network->dhcp_server;
132}
133
2d792895 134bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 135 assert(link);
910feb78 136 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 137
78c958f8
TG		 138 if (link->flags & IFF_LOOPBACK)
139 return false;
140
141 if (!link->network)
142 return false;
143
500b96eb 144 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 145 return false;
146
98d20a17 147 if (STRPTR_IN_SET(link->kind,
148 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 149 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 150 return false;
151
f410d463
YW		 152 /* L3 or L3S mode do not support ARP. */
153 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
154 return false;
155
f2bfcdb9
YW		 156 if (link->network->bond)
157 return false;
158
910feb78 159 return link->network->link_local & mask;
8bc17bb3
SS		 160}
161
b9d74c40
LP		 162static bool link_ipv6ll_enabled(Link *link) {
163 assert(link);
164
fa709992
LP		 165 if (!socket_ipv6_is_supported())
166 return false;
167
d0d6a4cd
TG		 168 if (link->flags & IFF_LOOPBACK)
169 return false;
170
171 if (!link->network)
172 return false;
173
500b96eb 174 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 175 return false;
176
177 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 178 return false;
179
f2bfcdb9
YW		 180 if (link->network->bond)
181 return false;
182
e0ee46f2 183 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 184}
185
439689c6
SS		 186static bool link_ipv6_enabled(Link *link) {
187 assert(link);
188
189 if (!socket_ipv6_is_supported())
190 return false;
191
b102cdca 192 if (link->network->bond)
2b00a4e0
TY		 193 return false;
194
500b96eb 195 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 196 return false;
197
4cef7fe3 198 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 199 if (link_ipv6ll_enabled(link))
200 return true;
201
202 if (network_has_static_ipv6_configurations(link->network))
203 return true;
204
205 return false;
439689c6
SS		 206}
207
7465dd22
PF		 208static bool link_radv_enabled(Link *link) {
209 assert(link);
210
211 if (!link_ipv6ll_enabled(link))
212 return false;
213
55a7c78b 214 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 215}
216
769d324c 217static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 218 assert(link);
219
5a8bcb67
LP		 220 if (link->flags & IFF_LOOPBACK)
221 return false;
222
223 if (!link->network)
224 return false;
225
2d792895 226 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 227 return false;
228
e0ee46f2 229 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 230}
231
232static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 233 assert(link);
765afd5c
LP		 234
235 if (!socket_ipv6_is_supported())
236 return false;
237
769d324c
LP		 238 if (link->flags & IFF_LOOPBACK)
239 return false;
240
241 if (!link->network)
242 return false;
243
2d792895 244 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 245 return false;
246
e0ee46f2 247 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 248}
249
23d8b221
SS		 250static bool link_proxy_arp_enabled(Link *link) {
251 assert(link);
252
253 if (link->flags & IFF_LOOPBACK)
254 return false;
255
256 if (!link->network)
257 return false;
258
259 if (link->network->proxy_arp < 0)
260 return false;
261
262 return true;
263}
264
b9d74c40
LP		 265static bool link_ipv6_accept_ra_enabled(Link *link) {
266 assert(link);
267
fa709992
LP		 268 if (!socket_ipv6_is_supported())
269 return false;
270
f5a8c43f
TG		 271 if (link->flags & IFF_LOOPBACK)
272 return false;
273
274 if (!link->network)
275 return false;
276
702c979f
SS		 277 if (!link_ipv6ll_enabled(link))
278 return false;
279
f5a8c43f
TG		 280 /* If unset use system default (enabled if local forwarding is disabled.
281 * disabled if local forwarding is enabled).
282 * If set, ignore or enforce RA independent of local forwarding state.
283 */
284 if (link->network->ipv6_accept_ra < 0)
285 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
286 return !link_ipv6_forward_enabled(link);
287 else if (link->network->ipv6_accept_ra > 0)
288 /* accept RA even if ip_forward is enabled */
289 return true;
290 else
291 /* ignore RA */
292 return false;
293}
294
1f0d9695 295static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 296 assert(link);
d68e2e59
LP		 297
298 if (!socket_ipv6_is_supported())
299 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
300
49092e22 301 if (link->flags & IFF_LOOPBACK)
1f0d9695 302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 303
304 if (!link->network)
1f0d9695 305 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 306
307 return link->network->ipv6_privacy_extensions;
308}
309
57ad7607 310static int link_update_ipv6_sysctl(Link *link) {
482efedc 311 bool enabled;
439689c6
SS		 312 int r;
313
314 if (link->flags & IFF_LOOPBACK)
315 return 0;
316
482efedc
SS		 317 enabled = link_ipv6_enabled(link);
318 if (enabled) {
319 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
320 if (r < 0)
57ad7607
ZJS		 321 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
322
323 log_link_info(link, "IPv6 successfully enabled");
482efedc 324 }
439689c6
SS		 325
326 return 0;
327}
328
34bf3c00
YW		 329static bool link_is_enslaved(Link *link) {
330 if (link->flags & IFF_SLAVE)
331 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
332 return true;
333
34bf3c00
YW		 334 if (!link->network)
335 return false;
336
bb262ef0 337 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 338 return true;
339
bb262ef0
YW		 340 /* TODO: add conditions for other netdevs. */
341
34bf3c00
YW		 342 return false;
343}
344
45e11abf
YW		 345static void link_update_master_operstate(Link *link, NetDev *netdev) {
346 Link *master;
347
348 if (!netdev)
349 return;
350
7936917e
YW		 351 if (netdev->ifindex <= 0)
352 return;
353
45e11abf
YW		 354 if (link_get(link->manager, netdev->ifindex, &master) < 0)
355 return;
356
357 link_update_operstate(master, true);
358}
359
360void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 361 LinkOperationalState operstate;
1678fbb3
YW		 362 LinkCarrierState carrier_state;
363 LinkAddressState address_state;
35c5a9ca 364 _cleanup_strv_free_ char **p = NULL;
1678fbb3 365 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 366 bool changed = false;
1678fbb3 367 Address *address;
45e11abf 368 Iterator i;
14153d1b 369
84de38c5
TG		 370 assert(link);
371
372 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 373 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 374 else if (link_has_carrier(link)) {
1678fbb3
YW		 375 if (link_is_enslaved(link))
376 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 377 else
1678fbb3 378 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 379 } else if (link->flags & IFF_UP)
1678fbb3 380 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 381 else
1678fbb3 382 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 383
1678fbb3 384 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 385 Link *slave;
386
5f707e12 387 SET_FOREACH(slave, link->slaves, i) {
959f65d3 388 link_update_operstate(slave, false);
84de38c5 389
1678fbb3
YW		 390 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
391 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 392 }
959f65d3 393 }
84de38c5 394
1678fbb3
YW		 395 SET_FOREACH(address, link->addresses, i) {
396 if (!address_is_ready(address))
397 continue;
84de38c5 398
1678fbb3
YW		 399 if (address->scope < scope)
400 scope = address->scope;
401 }
84de38c5 402
1678fbb3
YW		 403 /* for operstate we also take foreign addresses into account */
404 SET_FOREACH(address, link->addresses_foreign, i) {
405 if (!address_is_ready(address))
406 continue;
407
408 if (address->scope < scope)
409 scope = address->scope;
410 }
411
412 if (scope < RT_SCOPE_SITE)
413 /* universally accessible addresses found */
414 address_state = LINK_ADDRESS_STATE_ROUTABLE;
415 else if (scope < RT_SCOPE_HOST)
416 /* only link or site local addresses found */
417 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 418 else
1678fbb3
YW		 419 /* no useful addresses found */
420 address_state = LINK_ADDRESS_STATE_OFF;
421
422 /* Mapping of address and carrier state vs operational state
423 * carrier state
424 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
425 * ------------------------------------------------------------------------------
426 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
427 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
428 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
429 */
84de38c5 430
1678fbb3
YW		 431 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
432 operstate = (LinkOperationalState) carrier_state;
433 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
434 operstate = LINK_OPERSTATE_ROUTABLE;
435 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
436 operstate = LINK_OPERSTATE_DEGRADED;
437 else
14153d1b
YW		 438 operstate = LINK_OPERSTATE_ENSLAVED;
439
35c5a9ca
YW		 440 if (link->carrier_state != carrier_state) {
441 link->carrier_state = carrier_state;
442 changed = true;
443 if (strv_extend(&p, "CarrierState") < 0)
444 log_oom();
445 }
959f65d3 446
35c5a9ca
YW		 447 if (link->address_state != address_state) {
448 link->address_state = address_state;
449 changed = true;
450 if (strv_extend(&p, "AddressState") < 0)
451 log_oom();
959f65d3
YW		 452 }
453
84de38c5
TG		 454 if (link->operstate != operstate) {
455 link->operstate = operstate;
35c5a9ca
YW		 456 changed = true;
457 if (strv_extend(&p, "OperationalState") < 0)
458 log_oom();
84de38c5 459 }
959f65d3 460
35c5a9ca
YW		 461 if (p)
462 link_send_changed_strv(link, p);
463 if (changed)
464 link_dirty(link);
465
45e11abf
YW		 466 if (also_update_master && link->network) {
467 link_update_master_operstate(link, link->network->bond);
468 link_update_master_operstate(link, link->network->bridge);
959f65d3 469 }
84de38c5
TG		 470}
471
51d18171
TG		 472#define FLAG_STRING(string, flag, old, new) \
473 (((old ^ new) & flag) \
474 ? ((old & flag) ? (" -" string) : (" +" string)) \
475 : "")
476
bb262ef0 477static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 478 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
479 uint8_t operstate;
480 int r;
481
482 assert(link);
483
484 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 485 if (r < 0)
486 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 487
1c4baffc 488 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 489 if (r < 0)
490 /* if we got a message without operstate, take it to mean
491 the state was unchanged */
492 operstate = link->kernel_operstate;
493
bb262ef0 494 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 495 return 0;
496
497 if (link->flags != flags) {
6a7a4e4d 498 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 499 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
500 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
501 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
502 FLAG_STRING("UP", IFF_UP, link->flags, flags),
503 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
504 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
505 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
506 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
507 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
508 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
509 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
510 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
511 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
512 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
513 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
514 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
515 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
516 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
517 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
518
519 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
520 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
521 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
522 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
523 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
524 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
525 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
526 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
527
528 /* link flags are currently at most 18 bits, let's align to
529 * printing 20 */
530 if (unknown_flags_added)
79008bdd 531 log_link_debug(link,
6a7a4e4d 532 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 533 unknown_flags_added);
534
535 if (unknown_flags_removed)
79008bdd 536 log_link_debug(link,
6a7a4e4d 537 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 538 unknown_flags_removed);
539 }
540
541 link->flags = flags;
542 link->kernel_operstate = operstate;
543
959f65d3 544 link_update_operstate(link, true);
51d18171
TG		 545
546 return 0;
547}
548
1c4baffc 549static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 550 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 551 const char *ifname, *kind = NULL;
b710e6b6 552 unsigned short iftype;
572b21d9
YW		 553 int r, ifindex;
554 uint16_t type;
f579559b 555
0c2f9b84 556 assert(manager);
505f8da7 557 assert(message);
f579559b
TG		 558 assert(ret);
559
6cad256d
TJ		 560 /* check for link kind */
561 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
562 if (r == 0) {
db2f8a2e 563 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 564 r = sd_netlink_message_exit_container(message);
565 if (r < 0)
566 return r;
567 }
568
1c4baffc 569 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 570 if (r < 0)
571 return r;
572 else if (type != RTM_NEWLINK)
573 return -EINVAL;
574
575 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
576 if (r < 0)
577 return r;
578 else if (ifindex <= 0)
579 return -EINVAL;
580
b710e6b6
LP		 581 r = sd_rtnl_message_link_get_type(message, &iftype);
582 if (r < 0)
583 return r;
584
1c4baffc 585 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 586 if (r < 0)
587 return r;
588
17f9c355 589 link = new(Link, 1);
f579559b
TG		 590 if (!link)
591 return -ENOMEM;
592
17f9c355
YW		 593 *link = (Link) {
594 .n_ref = 1,
595 .manager = manager,
596 .state = LINK_STATE_PENDING,
17f9c355
YW		 597 .ifindex = ifindex,
598 .iftype = iftype,
15761549
YW		 599
600 .n_dns = (unsigned) -1,
601 .dns_default_route = -1,
602 .llmnr = _RESOLVE_SUPPORT_INVALID,
603 .mdns = _RESOLVE_SUPPORT_INVALID,
604 .dnssec_mode = _DNSSEC_MODE_INVALID,
605 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 606 };
607
505f8da7
TG		 608 link->ifname = strdup(ifname);
609 if (!link->ifname)
610 return -ENOMEM;
f579559b 611
6cad256d
TJ		 612 if (kind) {
613 link->kind = strdup(kind);
614 if (!link->kind)
615 return -ENOMEM;
616 }
617
cbff7170
TJ		 618 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
619 if (r < 0)
620 log_link_debug_errno(link, r, "New device has no master, continuing without");
621
1c4baffc 622 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 623 if (r < 0)
34437b4f 624 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 625
c643bda5 626 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 627 if (r < 0)
628 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
629
c643bda5
YW		 630 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
631 if (r < 0)
632 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
633
572b21d9
YW		 634 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
635 if (r < 0 && r != -ENODATA)
636 return r;
637
34437b4f 638 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 639 return -ENOMEM;
fe8db0c5 640
34437b4f 641 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 642 return -ENOMEM;
643
34437b4f 644 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 645 return -ENOMEM;
646
d5099efc 647 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 648 if (r < 0)
649 return r;
650
651 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 652 if (r < 0)
653 return r;
654
bb262ef0 655 r = link_update_flags(link, message, false);
51d18171
TG		 656 if (r < 0)
657 return r;
658
1cc6c93a 659 *ret = TAKE_PTR(link);
f579559b
TG		 660
661 return 0;
662}
663
15761549
YW		 664void link_ntp_settings_clear(Link *link) {
665 link->ntp = strv_free(link->ntp);
666}
667
668void link_dns_settings_clear(Link *link) {
669 link->dns = mfree(link->dns);
670 link->n_dns = (unsigned) -1;
671
672 link->search_domains = ordered_set_free_free(link->search_domains);
673 link->route_domains = ordered_set_free_free(link->route_domains);
674
675 link->dns_default_route = -1;
676 link->llmnr = _RESOLVE_SUPPORT_INVALID;
677 link->mdns = _RESOLVE_SUPPORT_INVALID;
678 link->dnssec_mode = _DNSSEC_MODE_INVALID;
679 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
680
681 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
682}
683
1a6bb31f
YW		 684static void link_free_engines(Link *link) {
685 if (!link)
686 return;
687
688 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
689 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
690 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
691 link->dhcp_routes = set_free(link->dhcp_routes);
692
693 link->lldp = sd_lldp_unref(link->lldp);
694
695 ndisc_flush(link);
696
697 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
698 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
699 link->ndisc = sd_ndisc_unref(link->ndisc);
700 link->radv = sd_radv_unref(link->radv);
701}
702
8301aa0b 703static Link *link_free(Link *link) {
428fd0a7
TG		 704 Address *address;
705
8301aa0b 706 assert(link);
f579559b 707
15761549
YW		 708 link_ntp_settings_clear(link);
709 link_dns_settings_clear(link);
710
f535e354
YW		 711 link->routes = set_free_with_destructor(link->routes, route_free);
712 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 713
c16c7808
SS		 714 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
715 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
716
d1bdafd2
WKI		 717 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
718 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
719
f535e354
YW		 720 link->addresses = set_free_with_destructor(link->addresses, address_free);
721 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 722
11bf3cce
LP		 723 while ((address = link->pool_addresses)) {
724 LIST_REMOVE(addresses, link->pool_addresses, address);
725 address_free(address);
726 }
727
7272b25e 728 link_lldp_emit_stop(link);
1a6bb31f 729 link_free_engines(link);
68a8723c 730 free(link->lease_file);
49699bac
SS		 731 free(link->lldp_file);
732
c166a070 733 free(link->ifname);
572b21d9 734 strv_free(link->alternative_names);
ceac4078 735 free(link->kind);
8d968fdd 736 free(link->ssid);
c643bda5 737 free(link->driver);
6cad256d 738
db2f8a2e 739 (void) unlink(link->state_file);
fe8db0c5 740 free(link->state_file);
c166a070 741
51517f9e 742 sd_device_unref(link->sd_device);
b5db00e5 743
0d4ad91d 744 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 745 hashmap_free(link->bound_by_links);
746
5f707e12 747 set_free_with_destructor(link->slaves, link_unref);
033295c1 748
c9c908a6
YW		 749 network_unref(link->network);
750
8301aa0b 751 return mfree(link);
14b746f7
TG		 752}
753
8301aa0b 754DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 755
11a7f229
TG		 756int link_get(Manager *m, int ifindex, Link **ret) {
757 Link *link;
11a7f229
TG		 758
759 assert(m);
e856ed00 760 assert(ifindex > 0);
11a7f229
TG		 761 assert(ret);
762
ae06ab10 763 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 764 if (!link)
765 return -ENODEV;
766
767 *ret = link;
768
769 return 0;
770}
771
af9ba57a 772void link_set_state(Link *link, LinkState state) {
e331e246
TG		 773 assert(link);
774
775 if (link->state == state)
776 return;
777
0beb9542
YW		 778 log_link_debug(link, "State changed: %s -> %s",
779 link_state_to_string(link->state),
780 link_state_to_string(state));
781
e331e246
TG		 782 link->state = state;
783
784 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 785}
786
57bd6899
TG		 787static void link_enter_unmanaged(Link *link) {
788 assert(link);
789
e331e246 790 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 791
84de38c5 792 link_dirty(link);
57bd6899
TG		 793}
794
95355a28 795int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 796 int r = 0, k;
051e77ca 797 Address *ad;
111bb8f9
TG		 798
799 assert(link);
800 assert(link->manager);
801 assert(link->manager->event);
802
d03073dd
YW		 803 dhcp4_release_old_lease(link);
804
80060352
ZJS		 805 bool keep_dhcp = may_keep_dhcp &&
806 link->network &&
807 (link->manager->restarting ||
808 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
809
810 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 811 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 812 if (k < 0)
36c7d709 813 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 814 }
815
ba179154 816 if (link->ipv4ll) {
111bb8f9 817 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 818 if (k < 0)
36c7d709 819 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 820 }
821
051e77ca
SS		 822 if (link->network)
823 LIST_FOREACH(addresses, ad, link->network->static_addresses)
824 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
825 k = sd_ipv4acd_stop(ad->acd);
826 if (k < 0)
827 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
828 }
829
f5a8c43f
TG		 830 if (link->dhcp6_client) {
831 k = sd_dhcp6_client_stop(link->dhcp6_client);
832 if (k < 0)
36c7d709 833 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 834 }
4138fb2c 835
1e7a0e21
LP		 836 if (link->ndisc) {
837 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 838 if (k < 0)
36c7d709 839 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 840 }
841
7465dd22
PF		 842 if (link->radv) {
843 k = sd_radv_stop(link->radv);
844 if (k < 0)
845 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
846 }
847
7272b25e 848 link_lldp_emit_stop(link);
111bb8f9
TG		 849 return r;
850}
851
b22d8a00 852void link_enter_failed(Link *link) {
ef1ba606 853 assert(link);
f882c247 854
370e9930 855 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 856 return;
857
6a7a4e4d 858 log_link_warning(link, "Failed");
449f7554 859
e331e246 860 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 861
95355a28 862 link_stop_clients(link, false);
111bb8f9 863
84de38c5 864 link_dirty(link);
f882c247
TG		 865}
866
7033af49
YW		 867static int link_join_netdevs_after_configured(Link *link) {
868 NetDev *netdev;
869 Iterator i;
870 int r;
871
872 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
873 if (netdev->ifindex > 0)
874 /* Assume already enslaved. */
875 continue;
876
877 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
878 continue;
879
880 log_struct(LOG_DEBUG,
881 LOG_LINK_INTERFACE(link),
882 LOG_NETDEV_INTERFACE(netdev),
883 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
884
885 r = netdev_join(netdev, link, NULL);
886 if (r < 0)
887 return log_struct_errno(LOG_WARNING, r,
888 LOG_LINK_INTERFACE(link),
889 LOG_NETDEV_INTERFACE(netdev),
890 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
891 }
892
893 return 0;
894}
895
e3a7b048 896static void link_enter_configured(Link *link) {
dd43110f
TG		 897 assert(link);
898 assert(link->network);
e3a7b048 899
289e6774 900 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 901 return;
dd43110f 902
e331e246 903 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 904
7033af49
YW		 905 (void) link_join_netdevs_after_configured(link);
906
84de38c5 907 link_dirty(link);
dd43110f
TG		 908}
909
47079967 910static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 911 RoutingPolicyRule *rule, *rrule = NULL;
912 int r;
913
914 assert(link);
915 assert(link->network);
916
2428613f
YW		 917 link->routing_policy_rules_configured = false;
918
8a9b3a23 919 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 920 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 921 if (r >= 0) {
922 if (r == 0)
923 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 924 continue;
925 }
926
9f08a578 927 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 928 if (r < 0)
929 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 930 if (r > 0)
931 link->routing_policy_rule_messages++;
8a9b3a23
SS		 932 }
933
934 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 935 if (link->routing_policy_rule_messages == 0) {
936 link->routing_policy_rules_configured = true;
937 link_check_ready(link);
b425c3ae 938 } else {
7715629e 939 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 940 link_set_state(link, LINK_STATE_CONFIGURING);
941 }
8a9b3a23
SS		 942
943 return 0;
944}
945
c16c7808
SS		 946static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
947 int r;
948
949 assert(link);
950 assert(link->nexthop_messages > 0);
951 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
952 LINK_STATE_FAILED, LINK_STATE_LINGER));
953
954 link->nexthop_messages--;
955
956 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
957 return 1;
958
959 r = sd_netlink_message_get_errno(m);
960 if (r < 0 && r != -EEXIST) {
5ecb131d 961 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 962 link_enter_failed(link);
963 return 1;
964 }
965
966 if (link->nexthop_messages == 0) {
967 log_link_debug(link, "Nexthop set");
968 link->static_nexthops_configured = true;
969 link_check_ready(link);
970 }
971
972 return 1;
973}
974
975int link_request_set_nexthop(Link *link) {
976 NextHop *nh;
977 int r;
978
979 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
980 r = nexthop_configure(nh, link, nexthop_handler);
981 if (r < 0)
982 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
983 if (r > 0)
984 link->nexthop_messages++;
985 }
986
987 if (link->nexthop_messages == 0) {
988 link->static_nexthops_configured = true;
989 link_check_ready(link);
990 } else {
991 log_link_debug(link, "Setting nexthop");
992 link_set_state(link, LINK_STATE_CONFIGURING);
993 }
994
995 return 1;
996}
997
302a796f 998static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 999 int r;
1000
1046bf9b 1001 assert(link);
7715629e 1002 assert(link->route_messages > 0);
289e6774
WKI		 1003 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1004 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1005
7715629e 1006 link->route_messages--;
f882c247 1007
77a008c0 1008 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1009 return 1;
1010
1c4baffc 1011 r = sd_netlink_message_get_errno(m);
4ff296b0 1012 if (r < 0 && r != -EEXIST) {
5ecb131d 1013 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1014 link_enter_failed(link);
1015 return 1;
1016 }
f882c247 1017
7715629e 1018 if (link->route_messages == 0) {
6a7a4e4d 1019 log_link_debug(link, "Routes set");
7715629e 1020 link->static_routes_configured = true;
8012cd39 1021 link_check_ready(link);
dd3efc09 1022 }
f882c247
TG		 1023
1024 return 1;
1025}
1026
b5799eeb 1027int link_request_set_routes(Link *link) {
bf61b05a
LP		 1028 enum {
1029 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1030 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1031 _PHASE_MAX
1032 } phase;
a6cc569e 1033 Route *rt;
f882c247
TG		 1034 int r;
1035
1036 assert(link);
1037 assert(link->network);
c42ff3a1
WKI		 1038 assert(link->addresses_configured);
1039 assert(link->address_messages == 0);
289e6774 1040 assert(link->state != _LINK_STATE_INVALID);
f882c247 1041
2428613f 1042 link->static_routes_configured = false;
c16c7808 1043 link->static_routes_ready = false;
27c34f73 1044
4e2ef9d9
YW		 1045 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1046 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1047 * the addresses now, let's not configure the routes either. */
1048 return 0;
1049
47079967 1050 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1051 if (r < 0)
1052 return r;
f882c247 1053
bf61b05a
LP		 1054 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1055 for (phase = 0; phase < _PHASE_MAX; phase++)
1056 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1057 if (rt->gateway_from_dhcp)
1058 continue;
0d34228f 1059
6ff5cc6b 1060 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1061 continue;
a6cc569e 1062
0d34228f 1063 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1064 if (r < 0)
1065 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1066 if (r > 0)
1067 link->route_messages++;
0d34228f 1068 }
f5be5601 1069
7715629e
ST		 1070 if (link->route_messages == 0) {
1071 link->static_routes_configured = true;
8012cd39 1072 link_check_ready(link);
b425c3ae 1073 } else {
6a7a4e4d 1074 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1075 link_set_state(link, LINK_STATE_CONFIGURING);
1076 }
f882c247
TG		 1077
1078 return 0;
1079}
1080
6accfd31
DA		 1081void link_check_ready(Link *link) {
1082 Address *a;
1083 Iterator i;
4ff296b0 1084 int r;
6accfd31
DA		 1085
1086 assert(link);
1087
1088 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1089 return;
1090
1091 if (!link->network)
1092 return;
1093
1094 if (!link->addresses_configured)
1095 return;
1096
1097 if (!link->neighbors_configured)
1098 return;
1099
6aa5773b
DA		 1100 SET_FOREACH(a, link->addresses, i)
1101 if (!address_is_ready(a))
1102 return;
1103
1104 if (!link->addresses_ready) {
1105 link->addresses_ready = true;
4ff296b0
YW		 1106 r = link_request_set_routes(link);
1107 if (r < 0)
1108 link_enter_failed(link);
710ce9e5 1109 return;
6aa5773b
DA		 1110 }
1111
6accfd31
DA		 1112 if (!link->static_routes_configured)
1113 return;
1114
c16c7808
SS		 1115 if (!link->static_routes_ready) {
1116 link->static_routes_ready = true;
1117 r = link_request_set_nexthop(link);
1118 if (r < 0)
1119 link_enter_failed(link);
1120 return;
1121 }
1122
1123 if (!link->static_nexthops_configured)
1124 return;
1125
6accfd31
DA		 1126 if (!link->routing_policy_rules_configured)
1127 return;
1128
34658df2 1129 if (!link->tc_configured)
4ecdcb07
YW		 1130 return;
1131
518cd6b5
SS		 1132 if (!link->sr_iov_configured)
1133 return;
1134
463797c1 1135 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1136
2aa7d367 1137 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address)
463797c1 1138 return;
6accfd31 1139
463797c1
YW		 1140 if (link_ipv6ll_enabled(link) &&
1141 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1142 return;
6accfd31 1143
3cd5924c 1144 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link)) &&
463797c1
YW		 1145 !link->dhcp4_configured &&
1146 !link->dhcp6_configured &&
3cd5924c 1147 !link->ndisc_configured &&
2aa7d367 1148 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address))
3cd5924c 1149 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
463797c1
YW		 1150 * an IPv4ll fallback address must be configured. */
1151 return;
463797c1 1152 }
6accfd31 1153
6accfd31
DA		 1154 if (link->state != LINK_STATE_CONFIGURED)
1155 link_enter_configured(link);
1156
1157 return;
1158}
1159
e4a71bf3
WKI		 1160static int link_request_set_neighbors(Link *link) {
1161 Neighbor *neighbor;
1162 int r;
1163
1164 assert(link);
1165 assert(link->network);
1166 assert(link->state != _LINK_STATE_INVALID);
1167
2428613f 1168 link->neighbors_configured = false;
e4a71bf3
WKI		 1169
1170 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1171 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1172 if (r < 0)
1173 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1174 }
1175
1176 if (link->neighbor_messages == 0) {
1177 link->neighbors_configured = true;
1178 link_check_ready(link);
b425c3ae 1179 } else {
e4a71bf3 1180 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1181 link_set_state(link, LINK_STATE_CONFIGURING);
1182 }
e4a71bf3
WKI		 1183
1184 return 0;
1185}
1186
9efa8a3c 1187int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1188 int r;
1189
4958aee4 1190 assert(rtnl);
f5be5601
TG		 1191 assert(m);
1192 assert(link);
1193 assert(link->ifname);
7715629e 1194 assert(link->address_messages > 0);
289e6774 1195 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1196 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1197
7715629e 1198 link->address_messages--;
f882c247 1199
5da8149f 1200 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1201 return 1;
1202
1c4baffc 1203 r = sd_netlink_message_get_errno(m);
4ff296b0 1204 if (r < 0 && r != -EEXIST) {
5ecb131d 1205 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1206 link_enter_failed(link);
1207 return 1;
1208 } else if (r >= 0)
1209 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1210
7715629e 1211 if (link->address_messages == 0) {
6a7a4e4d 1212 log_link_debug(link, "Addresses set");
c42ff3a1 1213 link->addresses_configured = true;
6aa5773b 1214 link_check_ready(link);
dd3efc09 1215 }
f882c247
TG		 1216
1217 return 1;
1218}
1219
f6bb7ac5
TJ		 1220static int link_set_bridge_fdb(Link *link) {
1221 FdbEntry *fdb_entry;
197e2809 1222 int r;
f6bb7ac5
TJ		 1223
1224 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1225 r = fdb_entry_configure(link, fdb_entry);
197e2809 1226 if (r < 0)
f6bb7ac5 1227 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1228 }
1229
197e2809 1230 return 0;
f6bb7ac5
TJ		 1231}
1232
289e6774 1233static int link_request_set_addresses(Link *link) {
95b74ef6 1234 AddressLabel *label;
a6cc569e 1235 Address *ad;
bd6379ec 1236 Prefix *p;
f882c247
TG		 1237 int r;
1238
1239 assert(link);
1240 assert(link->network);
f5be5601 1241 assert(link->state != _LINK_STATE_INVALID);
f882c247 1242
2428613f
YW		 1243 /* Reset all *_configured flags we are configuring. */
1244 link->addresses_configured = false;
6aa5773b 1245 link->addresses_ready = false;
2428613f
YW		 1246 link->neighbors_configured = false;
1247 link->static_routes_configured = false;
c16c7808
SS		 1248 link->static_routes_ready = false;
1249 link->static_nexthops_configured = false;
2428613f
YW		 1250 link->routing_policy_rules_configured = false;
1251
f6bb7ac5
TJ		 1252 r = link_set_bridge_fdb(link);
1253 if (r < 0)
1254 return r;
1255
f3ef324d
YW		 1256 r = link_request_set_neighbors(link);
1257 if (r < 0)
1258 return r;
e4a71bf3 1259
3d3d4255 1260 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1261 bool update;
1262
1263 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1264
1265 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1266 if (r < 0)
1267 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1268 if (r > 0)
1269 link->address_messages++;
95b74ef6
SS		 1270 }
1271
bd6379ec
SS		 1272 if (IN_SET(link->network->router_prefix_delegation,
1273 RADV_PREFIX_DELEGATION_STATIC,
1274 RADV_PREFIX_DELEGATION_BOTH))
1275 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1276 _cleanup_(address_freep) Address *address = NULL;
1277
1278 if (!p->assign)
1279 continue;
1280
1281 r = address_new(&address);
1282 if (r < 0)
1283 return log_link_error_errno(link, r, "Could not allocate address: %m");
1284
1285 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1286 if (r < 0)
1287 return r;
1288
1289 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1290 if (r < 0)
1291 return r;
1292
1293 address->family = AF_INET6;
1294 r = address_configure(address, link, address_handler, true);
1295 if (r < 0)
1296 return log_link_warning_errno(link, r, "Could not set addresses: %m");
1297 if (r > 0)
1298 link->address_messages++;
1299 }
1300
95b74ef6 1301 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1302 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1303 if (r < 0)
1304 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1305
7715629e 1306 link->address_label_messages++;
f882c247
TG		 1307 }
1308
d4cdbea5
TG		 1309 /* now that we can figure out a default address for the dhcp server,
1310 start it */
708c425d 1311 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1312 r = dhcp4_server_configure(link);
4ff296b0 1313 if (r < 0)
d4cdbea5 1314 return r;
6a7a4e4d 1315 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1316 }
1317
c42ff3a1
WKI		 1318 if (link->address_messages == 0) {
1319 link->addresses_configured = true;
6aa5773b 1320 link_check_ready(link);
b425c3ae 1321 } else {
6a7a4e4d 1322 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1323 link_set_state(link, LINK_STATE_CONFIGURING);
1324 }
431ca2ce 1325
f882c247
TG		 1326 return 0;
1327}
1328
13b498f9 1329static int link_set_bridge_vlan(Link *link) {
86e2be7b 1330 int r;
13b498f9
TJ		 1331
1332 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1333 if (r < 0)
1334 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1335
1336 return r;
1337}
1338
a60a720c 1339static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1340 int r;
1341
1342 if (!link_proxy_arp_enabled(link))
1343 return 0;
1344
62e021a9 1345 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1346 if (r < 0)
1347 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1348
1349 return 0;
1350}
1351
3a390124 1352static int link_configure_continue(Link *link);
55dc8c4a 1353
302a796f 1354static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1355 int r;
1356
1357 assert(m);
1358 assert(link);
1359 assert(link->ifname);
1360
55dc8c4a
YW		 1361 link->setting_mtu = false;
1362
5da8149f 1363 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1364 return 1;
1365
1c4baffc 1366 r = sd_netlink_message_get_errno(m);
4ff296b0 1367 if (r < 0)
5ecb131d 1368 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1369 else
1370 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1371
4ff296b0 1372 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1373 r = link_configure_continue(link);
4ff296b0
YW		 1374 if (r < 0)
1375 link_enter_failed(link);
1376 }
4f882b2a
TG		 1377
1378 return 1;
1379}
1380
933c70a0 1381int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1382 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1383 int r;
1384
1385 assert(link);
1386 assert(link->manager);
1387 assert(link->manager->rtnl);
1388
40288ece
YW		 1389 if (mtu == 0 || link->setting_mtu)
1390 return 0;
1391
933c70a0 1392 if (link->mtu == mtu)
ee493106
YW		 1393 return 0;
1394
6a7a4e4d 1395 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1396
6a7a4e4d
LP		 1397 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1398 if (r < 0)
1399 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1400
44b598a1 1401 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1402 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1403 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1404
1405 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1406 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1407
72c2500b 1408 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1409 }
1410
1c4baffc 1411 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1412 if (r < 0)
1413 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1414
302a796f
YW		 1415 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1416 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1417 if (r < 0)
1418 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1419
ae941762 1420 link_ref(link);
1046bf9b 1421 link->setting_mtu = true;
b226d99b 1422
4f882b2a
TG		 1423 return 0;
1424}
1425
f6fcc1c2
YW		 1426static bool link_reduces_vlan_mtu(Link *link) {
1427 /* See netif_reduces_vlan_mtu() in kernel. */
1428 return streq_ptr(link->kind, "macsec");
1429}
1430
1431static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1432 uint32_t mtu = 0;
1433 NetDev *dev;
1434 Iterator i;
1435
1436 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1437 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1438 /* See vlan_dev_change_mtu() in kernel. */
1439 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1440
1441 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1442 /* See macvlan_change_mtu() in kernel. */
1443 mtu = dev->mtu;
1444
1445 return mtu;
1446}
1447
1448static int link_configure_mtu(Link *link) {
1449 uint32_t mtu;
1450
1451 assert(link);
1452 assert(link->network);
1453
1454 if (link->network->mtu > 0)
1455 return link_set_mtu(link, link->network->mtu);
1456
1457 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1458 if (link->mtu >= mtu)
1459 return 0;
1460
1461 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1462 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1463 link->mtu, mtu);
1464
1465 return link_set_mtu(link, mtu);
1466}
1467
302a796f 1468static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1469 int r;
1470
1471 assert(m);
1472 assert(link);
1473 assert(link->ifname);
1474
1475 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1476 return 1;
1477
1478 r = sd_netlink_message_get_errno(m);
1479 if (r < 0)
5ecb131d 1480 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1481
1482 return 1;
1483}
1484
1485static int link_set_flags(Link *link) {
1486 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1487 unsigned ifi_change = 0;
1488 unsigned ifi_flags = 0;
1489 int r;
1490
1491 assert(link);
1492 assert(link->manager);
1493 assert(link->manager->rtnl);
1494
1495 if (link->flags & IFF_LOOPBACK)
1496 return 0;
1497
1498 if (!link->network)
1499 return 0;
1500
866e6b7a 1501 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1502 return 0;
1503
1504 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1505 if (r < 0)
1506 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1507
1508 if (link->network->arp >= 0) {
1509 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1510 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1511 }
1512
1513 if (link->network->multicast >= 0) {
1514 ifi_change |= IFF_MULTICAST;
1515 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1516 }
1517
866e6b7a
SS		 1518 if (link->network->allmulticast >= 0) {
1519 ifi_change |= IFF_ALLMULTI;
1520 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1521 }
1522
99d2baa2
SS		 1523 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1524 if (r < 0)
1525 return log_link_error_errno(link, r, "Could not set link flags: %m");
1526
302a796f
YW		 1527 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1528 link_netlink_destroy_callback, link);
99d2baa2
SS		 1529 if (r < 0)
1530 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1531
1532 link_ref(link);
1533
1534 return 0;
1535}
1536
e7ab854c
TG		 1537static int link_acquire_ipv6_conf(Link *link) {
1538 int r;
1539
1540 assert(link);
1541
e7ab854c 1542 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1543 assert(link->ndisc);
e7ab854c
TG		 1544
1545 log_link_debug(link, "Discovering IPv6 routers");
1546
1e7a0e21 1547 r = sd_ndisc_start(link->ndisc);
63348d13 1548 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1549 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1550 }
1551
7465dd22
PF		 1552 if (link_radv_enabled(link)) {
1553 assert(link->radv);
1554 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1555
1556 log_link_debug(link, "Starting IPv6 Router Advertisements");
1557
fd3ef936
YW		 1558 r = radv_emit_dns(link);
1559 if (r < 0)
1560 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1561
7465dd22
PF		 1562 r = sd_radv_start(link->radv);
1563 if (r < 0 && r != -EBUSY)
1564 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1565 }
1566
838d39af
SS		 1567 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1568 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1569 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1570 assert(link->dhcp6_client);
1571 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1572
838d39af 1573 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1
SS		 1574 if (r < 0 && r != -EBUSY)
1575 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
1576 else
1577 log_link_debug(link, "Acquiring DHCPv6 lease");
1578 }
1579
10752343
PF		 1580 (void) dhcp6_request_prefix_delegation(link);
1581
e7ab854c
TG		 1582 return 0;
1583}
1584
6fc25497 1585static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1586 int r;
1587
1588 assert(link);
ff254138
TG		 1589 assert(link->manager);
1590 assert(link->manager->event);
1591
910feb78 1592 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1593 assert(link->ipv4ll);
ff254138 1594
6a7a4e4d 1595 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1596
1597 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1598 if (r < 0)
1599 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1600 }
1601
78c958f8 1602 if (link_dhcp4_enabled(link)) {
eb34d4af 1603 assert(link->dhcp_client);
ff254138 1604
6a7a4e4d 1605 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1606
5c1d3fc9 1607 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1608 if (r < 0)
1609 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1610 }
ff254138 1611
6fc25497
SS		 1612 return 0;
1613}
1614
1615static int link_acquire_conf(Link *link) {
1616 int r;
1617
1618 assert(link);
1619
1620 r = link_acquire_ipv4_conf(link);
1621 if (r < 0)
1622 return r;
1623
3f7cc080 1624 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1625 r = link_acquire_ipv6_conf(link);
1626 if (r < 0)
1627 return r;
1628 }
1629
7272b25e
LP		 1630 if (link_lldp_emit_enabled(link)) {
1631 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1632 if (r < 0)
1633 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1634 }
1635
ff254138
TG		 1636 return 0;
1637}
1638
a61bb41c 1639bool link_has_carrier(Link *link) {
deb2e523
TG		 1640 /* see Documentation/networking/operstates.txt in the kernel sources */
1641
a61bb41c 1642 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1643 return true;
1644
a61bb41c 1645 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1646 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1647 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1648 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1649 return true;
1650
1651 return false;
1652}
1653
0e2fdb83
SS		 1654static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1655 int r;
1656
1657 assert(link);
1658
9524014e
DS		 1659 link->setting_genmode = false;
1660
0e2fdb83
SS		 1661 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1662 return 1;
1663
1664 r = sd_netlink_message_get_errno(m);
1665 if (r < 0)
5ecb131d 1666 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1667 else
1668 log_link_debug(link, "Setting address genmode done.");
1669
1670 if (link->state == LINK_STATE_INITIALIZED) {
1671 r = link_configure_continue(link);
1672 if (r < 0)
1673 link_enter_failed(link);
1674 }
0e2fdb83
SS		 1675
1676 return 1;
1677}
1678
1679static int link_configure_addrgen_mode(Link *link) {
1680 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1681 uint8_t ipv6ll_mode;
1682 int r;
1683
1684 assert(link);
1685 assert(link->network);
1686 assert(link->manager);
1687 assert(link->manager->rtnl);
1688
9524014e 1689 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1690 return 0;
1691
0e2fdb83
SS		 1692 log_link_debug(link, "Setting address genmode for link");
1693
1694 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1695 if (r < 0)
1696 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1697
1698 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1699 if (r < 0)
1700 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1701
1702 r = sd_netlink_message_open_container(req, AF_INET6);
1703 if (r < 0)
1704 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1705
1706 if (!link_ipv6ll_enabled(link))
1707 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1708 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1709 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1710 if (r < 0) {
1711 /* The file may not exist. And even if it exists, when stable_secret is unset,
1712 * reading the file fails with EIO. */
1713 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1714
1715 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1716 } else
1717 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1718 } else
6f6296b9 1719 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1720
1721 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1722 if (r < 0)
1723 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1724
1725 r = sd_netlink_message_close_container(req);
1726 if (r < 0)
1727 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1728
1729 r = sd_netlink_message_close_container(req);
1730 if (r < 0)
1731 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1732
1733 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1734 link_netlink_destroy_callback, link);
1735 if (r < 0)
1736 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1737
1738 link_ref(link);
9524014e 1739 link->setting_genmode = true;
0e2fdb83
SS		 1740
1741 return 0;
1742}
1743
302a796f 1744static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1745 int r;
1746
1746cf2a
TG		 1747 assert(link);
1748
5da8149f 1749 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1750 return 1;
1751
1c4baffc 1752 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1753 if (r < 0)
26d6b214 1754 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1755 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1756
f882c247
TG		 1757 return 1;
1758}
1759
1cc84f3b 1760static int link_up(Link *link) {
4afd3348 1761 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1762 int r;
1763
f882c247 1764 assert(link);
c106cc36 1765 assert(link->network);
f882c247
TG		 1766 assert(link->manager);
1767 assert(link->manager->rtnl);
1768
6a7a4e4d 1769 log_link_debug(link, "Bringing link up");
449f7554 1770
6a7a4e4d
LP		 1771 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1772 if (r < 0)
1773 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1774
2b2d8603 1775 /* set it free if not enslaved with networkd */
6cb955c6 1776 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1777 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1778 if (r < 0)
1779 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1780 }
1781
5d4795f3 1782 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1783 if (r < 0)
1784 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1785
c106cc36 1786 if (link->network->mac) {
1c4baffc 1787 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1788 if (r < 0)
1789 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1790 }
1791
302a796f
YW		 1792 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1793 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1794 if (r < 0)
1795 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1796
b226d99b
TG		 1797 link_ref(link);
1798
f882c247
TG		 1799 return 0;
1800}
1801
302a796f 1802static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1803 int r;
1804
1805 assert(link);
1806
1807 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1808 return 1;
1809
1c4baffc 1810 r = sd_netlink_message_get_errno(m);
0d4ad91d 1811 if (r < 0)
5ecb131d 1812 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1813
1814 return 1;
1815}
1816
8e54db83 1817int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1818 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1819 int r;
1820
1821 assert(link);
1822 assert(link->manager);
1823 assert(link->manager->rtnl);
1824
6a7a4e4d 1825 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1826
1827 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1828 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1829 if (r < 0)
1830 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1831
1832 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1833 if (r < 0)
1834 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1835
8e54db83
YW		 1836 r = netlink_call_async(link->manager->rtnl, NULL, req,
1837 callback ?: link_down_handler,
302a796f 1838 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1839 if (r < 0)
1840 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1841
1842 link_ref(link);
1843
1844 return 0;
1845}
1846
89fe6535
SS		 1847static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1848 int r;
1849
1850 assert(link);
1851
1852 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1853 return 1;
1854
1855 r = sd_netlink_message_get_errno(m);
1856 if (r < 0)
1857 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1858
1859 return 1;
1860}
1861
1862static int link_set_group(Link *link) {
1863 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1864 int r;
1865
1866 assert(link);
1867 assert(link->network);
1868 assert(link->manager);
1869 assert(link->manager->rtnl);
1870
1871 if (link->network->group <= 0)
1872 return 0;
1873
1874 log_link_debug(link, "Setting group");
1875
1876 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1877 if (r < 0)
1878 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1879
1880 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1881 if (r < 0)
1882 return log_link_error_errno(link, r, "Could not set link group: %m");
1883
1884 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1885 link_netlink_destroy_callback, link);
1886 if (r < 0)
1887 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1888
1889 link_ref(link);
1890
1891 return 0;
1892}
1893
0d4ad91d
AR		 1894static int link_handle_bound_to_list(Link *link) {
1895 Link *l;
1896 Iterator i;
1897 int r;
1898 bool required_up = false;
1899 bool link_is_up = false;
1900
1901 assert(link);
1902
1903 if (hashmap_isempty(link->bound_to_links))
1904 return 0;
1905
1906 if (link->flags & IFF_UP)
1907 link_is_up = true;
1908
1909 HASHMAP_FOREACH (l, link->bound_to_links, i)
1910 if (link_has_carrier(l)) {
1911 required_up = true;
1912 break;
1913 }
1914
1915 if (!required_up && link_is_up) {
8e54db83 1916 r = link_down(link, NULL);
0d4ad91d
AR		 1917 if (r < 0)
1918 return r;
1919 } else if (required_up && !link_is_up) {
1920 r = link_up(link);
1921 if (r < 0)
1922 return r;
1923 }
1924
1925 return 0;
1926}
1927
1928static int link_handle_bound_by_list(Link *link) {
1929 Iterator i;
1930 Link *l;
1931 int r;
1932
1933 assert(link);
1934
1935 if (hashmap_isempty(link->bound_by_links))
1936 return 0;
1937
1938 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1939 r = link_handle_bound_to_list(l);
1940 if (r < 0)
1941 return r;
1942 }
1943
1944 return 0;
1945}
1946
1947static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1948 int r;
1949
1950 assert(link);
1951 assert(carrier);
1952
1953 if (link == carrier)
1954 return 0;
1955
1956 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1957 return 0;
1958
1959 r = hashmap_ensure_allocated(h, NULL);
1960 if (r < 0)
1961 return r;
1962
1963 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1964 if (r < 0)
1965 return r;
1966
1967 return 0;
1968}
1969
1970static int link_new_bound_by_list(Link *link) {
1971 Manager *m;
1972 Link *carrier;
1973 Iterator i;
1974 int r;
1975 bool list_updated = false;
1976
1977 assert(link);
1978 assert(link->manager);
1979
1980 m = link->manager;
1981
b295beea 1982 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1983 if (!carrier->network)
1984 continue;
1985
1986 if (strv_isempty(carrier->network->bind_carrier))
1987 continue;
1988
191a3f16 1989 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1990 r = link_put_carrier(link, carrier, &link->bound_by_links);
1991 if (r < 0)
1992 return r;
1993
1994 list_updated = true;
1995 }
1996 }
1997
1998 if (list_updated)
84de38c5 1999 link_dirty(link);
0d4ad91d 2000
b295beea 2001 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2002 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2003 if (r < 0)
2004 return r;
2005
84de38c5 2006 link_dirty(carrier);
0d4ad91d
AR		 2007 }
2008
2009 return 0;
2010}
2011
2012static int link_new_bound_to_list(Link *link) {
2013 Manager *m;
2014 Link *carrier;
2015 Iterator i;
2016 int r;
2017 bool list_updated = false;
2018
2019 assert(link);
2020 assert(link->manager);
2021
2022 if (!link->network)
2023 return 0;
2024
2025 if (strv_isempty(link->network->bind_carrier))
2026 return 0;
2027
2028 m = link->manager;
2029
2030 HASHMAP_FOREACH (carrier, m->links, i) {
191a3f16 2031 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2032 r = link_put_carrier(link, carrier, &link->bound_to_links);
2033 if (r < 0)
2034 return r;
2035
2036 list_updated = true;
2037 }
2038 }
2039
2040 if (list_updated)
84de38c5 2041 link_dirty(link);
0d4ad91d
AR		 2042
2043 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2044 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2045 if (r < 0)
2046 return r;
2047
84de38c5 2048 link_dirty(carrier);
0d4ad91d
AR		 2049 }
2050
2051 return 0;
2052}
2053
2054static int link_new_carrier_maps(Link *link) {
2055 int r;
2056
2057 r = link_new_bound_by_list(link);
2058 if (r < 0)
2059 return r;
2060
2061 r = link_handle_bound_by_list(link);
2062 if (r < 0)
2063 return r;
2064
2065 r = link_new_bound_to_list(link);
2066 if (r < 0)
2067 return r;
2068
2069 r = link_handle_bound_to_list(link);
2070 if (r < 0)
2071 return r;
2072
2073 return 0;
2074}
2075
2076static void link_free_bound_to_list(Link *link) {
2077 Link *bound_to;
2078 Iterator i;
2079
2080 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2081 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2082
2083 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2084 link_dirty(bound_to);
0d4ad91d
AR		 2085 }
2086
2087 return;
2088}
2089
2090static void link_free_bound_by_list(Link *link) {
2091 Link *bound_by;
2092 Iterator i;
2093
2094 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2095 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2096
2097 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2098 link_dirty(bound_by);
0d4ad91d
AR		 2099 link_handle_bound_to_list(bound_by);
2100 }
2101 }
2102
2103 return;
2104}
2105
2106static void link_free_carrier_maps(Link *link) {
2107 bool list_updated = false;
2108
2109 assert(link);
2110
2111 if (!hashmap_isempty(link->bound_to_links)) {
2112 link_free_bound_to_list(link);
2113 list_updated = true;
2114 }
2115
2116 if (!hashmap_isempty(link->bound_by_links)) {
2117 link_free_bound_by_list(link);
2118 list_updated = true;
2119 }
2120
2121 if (list_updated)
84de38c5 2122 link_dirty(link);
0d4ad91d
AR		 2123
2124 return;
2125}
2126
5f707e12
YW		 2127static int link_append_to_master(Link *link, NetDev *netdev) {
2128 Link *master;
2129 int r;
2130
2131 assert(link);
2132 assert(netdev);
2133
2134 r = link_get(link->manager, netdev->ifindex, &master);
2135 if (r < 0)
2136 return r;
2137
de7fef4b 2138 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2139 if (r <= 0)
5f707e12
YW		 2140 return r;
2141
2142 link_ref(link);
2143 return 0;
2144}
2145
2146static void link_drop_from_master(Link *link, NetDev *netdev) {
2147 Link *master;
2148
2149 assert(link);
2150
2151 if (!link->manager || !netdev)
2152 return;
2153
2154 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2155 return;
2156
2157 link_unref(set_remove(master->slaves, link));
2158}
2159
2160static void link_detach_from_manager(Link *link) {
2161 if (!link || !link->manager)
2162 return;
2163
2164 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2165 link_clean(link);
2166
2167 /* The following must be called at last. */
2168 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2169 link_unref(link);
2170}
2171
0d4ad91d
AR		 2172void link_drop(Link *link) {
2173 if (!link || link->state == LINK_STATE_LINGER)
2174 return;
2175
2176 link_set_state(link, LINK_STATE_LINGER);
2177
2178 link_free_carrier_maps(link);
2179
5f707e12
YW		 2180 if (link->network) {
2181 link_drop_from_master(link, link->network->bridge);
2182 link_drop_from_master(link, link->network->bond);
2183 }
2184
6a7a4e4d 2185 log_link_debug(link, "Link removed");
0d4ad91d 2186
db2f8a2e 2187 (void) unlink(link->state_file);
c4397d94 2188 link_detach_from_manager(link);
0d4ad91d
AR		 2189}
2190
3f265037 2191static int link_joined(Link *link) {
f882c247
TG		 2192 int r;
2193
ef1ba606 2194 assert(link);
f5be5601 2195 assert(link->network);
dd3efc09 2196
0d4ad91d
AR		 2197 if (!hashmap_isempty(link->bound_to_links)) {
2198 r = link_handle_bound_to_list(link);
2199 if (r < 0)
2200 return r;
2201 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2202 r = link_up(link);
2203 if (r < 0) {
2204 link_enter_failed(link);
2205 return r;
2206 }
ef1ba606 2207 }
f882c247 2208
9ed794a3 2209 if (link->network->bridge) {
e1853b00 2210 r = link_set_bridge(link);
6a7a4e4d
LP		 2211 if (r < 0)
2212 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2213
2214 r = link_append_to_master(link, link->network->bridge);
2215 if (r < 0)
2216 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2217 }
2218
eb64b435 2219 if (link->network->bond) {
7fcee284 2220 r = link_set_bond(link);
eb64b435
SS		 2221 if (r < 0)
2222 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2223
45e11abf 2224 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2225 if (r < 0)
2226 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2227 }
2228
ffff9abe
TJ		 2229 if (link->network->use_br_vlan &&
2230 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2231 r = link_set_bridge_vlan(link);
2232 if (r < 0)
2233 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2234 }
2235
c1835a42
RM		 2236 /* Skip setting up addresses until it gets carrier,
2237 or it would try to set addresses twice,
2238 which is bad for non-idempotent steps. */
dad2d78e 2239 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2240 return 0;
2241
b425c3ae 2242 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2243 return link_request_set_addresses(link);
02b59d57
TG		 2244}
2245
302a796f 2246static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2247 int r;
2248
1746cf2a 2249 assert(link);
ef1ba606 2250 assert(link->network);
34bf3c00 2251 assert(link->enslaving > 0);
02b59d57 2252
313cefa1 2253 link->enslaving--;
52433f6b 2254
5da8149f 2255 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2256 return 1;
2257
1c4baffc 2258 r = sd_netlink_message_get_errno(m);
856f962c 2259 if (r < 0 && r != -EEXIST) {
5ecb131d 2260 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2261 link_enter_failed(link);
2262 return 1;
4ff296b0
YW		 2263 }
2264
2265 log_link_debug(link, "Joined netdev");
02b59d57 2266
34bf3c00 2267 if (link->enslaving == 0) {
4ff296b0
YW		 2268 r = link_joined(link);
2269 if (r < 0)
2270 link_enter_failed(link);
34bf3c00 2271 }
02b59d57
TG		 2272
2273 return 1;
2274}
2275
3f265037 2276static int link_enter_join_netdev(Link *link) {
6a0a2f86 2277 NetDev *netdev;
672682a6 2278 Iterator i;
02b59d57
TG		 2279 int r;
2280
2281 assert(link);
2282 assert(link->network);
bd08ce56 2283 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2284
289e6774 2285 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2286
84de38c5 2287 link_dirty(link);
34bf3c00 2288 link->enslaving = 0;
02b59d57 2289
d9c67ea1 2290 if (link->network->bond) {
cbff7170
TJ		 2291 if (link->network->bond->state == NETDEV_STATE_READY &&
2292 link->network->bond->ifindex == link->master_ifindex)
2293 return link_joined(link);
2294
f2341e0a
LP		 2295 log_struct(LOG_DEBUG,
2296 LOG_LINK_INTERFACE(link),
2297 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2298 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2299
34bf3c00
YW		 2300 link->enslaving++;
2301
f2341e0a 2302 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2303 if (r < 0) {
f2341e0a
LP		 2304 log_struct_errno(LOG_WARNING, r,
2305 LOG_LINK_INTERFACE(link),
2306 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2307 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2308 link_enter_failed(link);
2309 return r;
2310 }
0ad6148e
MO		 2311 }
2312
d9c67ea1 2313 if (link->network->bridge) {
f2341e0a
LP		 2314 log_struct(LOG_DEBUG,
2315 LOG_LINK_INTERFACE(link),
2316 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2317 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2318
34bf3c00
YW		 2319 link->enslaving++;
2320
f2341e0a 2321 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2322 if (r < 0) {
f2341e0a
LP		 2323 log_struct_errno(LOG_WARNING, r,
2324 LOG_LINK_INTERFACE(link),
2325 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2326 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2327 link_enter_failed(link);
2328 return r;
2329 }
52433f6b
TG		 2330 }
2331
6cb955c6
AR		 2332 if (link->network->vrf) {
2333 log_struct(LOG_DEBUG,
2334 LOG_LINK_INTERFACE(link),
2335 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2336 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2337
34bf3c00
YW		 2338 link->enslaving++;
2339
6cb955c6
AR		 2340 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2341 if (r < 0) {
2342 log_struct_errno(LOG_WARNING, r,
2343 LOG_LINK_INTERFACE(link),
2344 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2345 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2346 link_enter_failed(link);
2347 return r;
2348 }
6cb955c6
AR		 2349 }
2350
6a0a2f86 2351 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2352
2b6db913
YW		 2353 if (netdev->ifindex > 0)
2354 /* Assume already enslaved. */
a63e5daa 2355 continue;
a63e5daa 2356
7033af49
YW		 2357 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2358 continue;
2359
f2341e0a
LP		 2360 log_struct(LOG_DEBUG,
2361 LOG_LINK_INTERFACE(link),
2362 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2363 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2364
34bf3c00
YW		 2365 link->enslaving++;
2366
f2341e0a 2367 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2368 if (r < 0) {
f2341e0a
LP		 2369 log_struct_errno(LOG_WARNING, r,
2370 LOG_LINK_INTERFACE(link),
2371 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2372 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2373 link_enter_failed(link);
2374 return r;
2375 }
326cb406
SS		 2376 }
2377
34bf3c00
YW		 2378 if (link->enslaving == 0)
2379 return link_joined(link);
2380
ef1ba606
TG		 2381 return 0;
2382}
2383
769d324c 2384static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2385 int r;
2386
765afd5c 2387 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2388 return 0;
2389
765afd5c
LP		 2390 /* We propagate the forwarding flag from one interface to the
2391 * global setting one way. This means: as long as at least one
2392 * interface was configured at any time that had IP forwarding
2393 * enabled the setting will stay on for good. We do this
2394 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2395 * somewhat in sync (see below). */
15dee3f0 2396
62e021a9 2397 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2398 if (r < 0)
765afd5c 2399 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2400
769d324c
LP		 2401 return 0;
2402}
2403
2404static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2405 int r;
2406
765afd5c 2407 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2408 return 0;
2409
61233823 2410 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2411 * packet forwarding setting: either packet forwarding is on
2412 * for all, or off for all. We hence don't bother with a
2413 * per-interface setting, but simply propagate the interface
2414 * flag, if it is set, to the global flag, one-way. Note that
2415 * while IPv4 would allow a per-interface flag, we expose the
2416 * same behaviour there and also propagate the setting from
2417 * one to all, to keep things simple (see above). */
15dee3f0 2418
62e021a9 2419 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2420 if (r < 0)
765afd5c 2421 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2422
2423 return 0;
2424}
2425
49092e22 2426static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2427 IPv6PrivacyExtensions s;
49092e22
SS		 2428 int r;
2429
1f0d9695 2430 s = link_ipv6_privacy_extensions(link);
66a6bd68 2431 if (s < 0)
49092e22
SS		 2432 return 0;
2433
62e021a9 2434 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2435 if (r < 0)
49092e22
SS		 2436 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2437
2438 return 0;
2439}
2440
4f2e437a 2441static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2442 int r;
2443
2444 /* Make this a NOP if IPv6 is not available */
2445 if (!socket_ipv6_is_supported())
2446 return 0;
2447
2448 if (link->flags & IFF_LOOPBACK)
2449 return 0;
2450
d68e2e59
LP		 2451 if (!link->network)
2452 return 0;
2453
62e021a9 2454 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2455 if (r < 0)
fe307276 2456 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2457
2458 return 0;
2459}
2460
8749cbcd 2461static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2462 int r;
2463
2464 /* Make this a NOP if IPv6 is not available */
2465 if (!socket_ipv6_is_supported())
2466 return 0;
2467
2468 if (link->flags & IFF_LOOPBACK)
2469 return 0;
2470
d68e2e59
LP		 2471 if (!link->network)
2472 return 0;
2473
8749cbcd
SS		 2474 if (link->network->ipv6_dad_transmits < 0)
2475 return 0;
2476
62e021a9 2477 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2478 if (r < 0)
8749cbcd 2479 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2480
2481 return 0;
2482}
2483
b69c3180 2484static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2485 int r;
2486
2487 /* Make this a NOP if IPv6 is not available */
2488 if (!socket_ipv6_is_supported())
2489 return 0;
2490
2491 if (link->flags & IFF_LOOPBACK)
2492 return 0;
2493
d68e2e59
LP		 2494 if (!link->network)
2495 return 0;
2496
b69c3180
SS		 2497 if (link->network->ipv6_hop_limit < 0)
2498 return 0;
2499
62e021a9 2500 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2501 if (r < 0)
b69c3180 2502 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2503
2504 return 0;
2505}
2506
11102cba 2507static int link_set_ipv6_mtu(Link *link) {
11102cba
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
2517 if (link->network->ipv6_mtu == 0)
2518 return 0;
2519
d236718c
DS		 2520 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2521 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2522 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2523 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2524 link->network->ipv6_mtu = IPV6_MIN_MTU;
2525 }
2526
62e021a9 2527 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2528 if (r < 0) {
2529 if (link->mtu < link->network->ipv6_mtu)
2530 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2531 link->network->ipv6_mtu, link->mtu);
2532 else
2533 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2534 }
2535
2536 link->ipv6_mtu_set = true;
11102cba
SS		 2537
2538 return 0;
2539}
2540
94d76d07
YW		 2541static int link_set_ipv4_accept_local(Link *link) {
2542 int r;
2543
2544 if (link->flags & IFF_LOOPBACK)
2545 return 0;
2546
2547 if (link->network->ipv4_accept_local < 0)
2548 return 0;
2549
2550 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2551 if (r < 0)
2552 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2553
2554 return 0;
2555}
2556
30226d27
TJ		 2557static bool link_is_static_address_configured(Link *link, Address *address) {
2558 Address *net_address;
2559
2560 assert(link);
2561 assert(address);
2562
2563 if (!link->network)
2564 return false;
2565
2566 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2567 if (address_equal(net_address, address))
2568 return true;
2569
2570 return false;
2571}
2572
d1bdafd2
WKI		 2573static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2574 Neighbor *net_neighbor;
2575
2576 assert(link);
2577 assert(neighbor);
2578
2579 if (!link->network)
2580 return false;
2581
2582 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2583 if (neighbor_equal(net_neighbor, neighbor))
2584 return true;
2585
2586 return false;
2587}
2588
7ecf0c3e
TJ		 2589static bool link_is_static_route_configured(Link *link, Route *route) {
2590 Route *net_route;
2591
2592 assert(link);
2593 assert(route);
2594
2595 if (!link->network)
2596 return false;
2597
2598 LIST_FOREACH(routes, net_route, link->network->static_routes)
2599 if (route_equal(net_route, route))
2600 return true;
2601
2602 return false;
2603}
2604
db51778f
YW		 2605static bool link_address_is_dynamic(Link *link, Address *address) {
2606 Route *route;
2607 Iterator i;
2608
2609 assert(link);
2610 assert(address);
2611
2612 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2613 return true;
2614
2615 /* Even when the address is leased from a DHCP server, networkd assign the address
2616 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2617 * corresponding routes with RTPROT_DHCP. */
2618 SET_FOREACH(route, link->routes_foreign, i) {
2619 if (route->protocol != RTPROT_DHCP)
2620 continue;
2621
2622 if (address->family != route->family)
2623 continue;
2624
2625 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2626 return true;
2627 }
2628
2629 return false;
2630}
2631
0917a271
DS		 2632static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2633 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2634 sd_netlink_message *addr;
2635 int r;
2636
2637 assert(link);
2638 assert(link->manager);
2639 assert(link->manager->rtnl);
2640
2641 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2642 if (r < 0)
2643 return r;
2644
2645 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2646 if (r < 0)
2647 return r;
2648
2649 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2650 unsigned char flags;
2651 int ifindex;
2652
2653 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2654 if (r < 0) {
2655 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2656 continue;
2657 } else if (link->ifindex != ifindex)
2658 continue;
2659
2660 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2661 if (r < 0) {
2662 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2663 continue;
2664 } else if (!(flags & IFA_F_TENTATIVE))
2665 continue;
2666
2667 log_link_debug(link, "Found tentative ipv6 link-local address");
2668 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2669 }
2670
2671 return 0;
2672}
2673
5e5b137a
TG		 2674static int link_drop_foreign_config(Link *link) {
2675 Address *address;
d1bdafd2 2676 Neighbor *neighbor;
5e5b137a
TG		 2677 Route *route;
2678 Iterator i;
2679 int r;
2680
0917a271
DS		 2681 /* The kernel doesn't notify us about tentative addresses;
2682 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2683 if (!link_ipv6ll_enabled(link)) {
2684 r = link_enumerate_ipv6_tentative_addresses(link);
2685 if (r < 0)
2686 return r;
2687 }
2688
5e5b137a 2689 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2690 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2691 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2692 continue;
2693
db51778f 2694 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2695 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2696 continue;
b1b0b42e 2697 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2698 continue;
2699
30226d27
TJ		 2700 if (link_is_static_address_configured(link, address)) {
2701 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2702 if (r < 0)
2703 return log_link_error_errno(link, r, "Failed to add address: %m");
2704 } else {
63ae0569 2705 r = address_remove(address, link, NULL);
30226d27
TJ		 2706 if (r < 0)
2707 return r;
2708 }
5e5b137a
TG		 2709 }
2710
d1bdafd2
WKI		 2711 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2712 if (link_is_neighbor_configured(link, neighbor)) {
2713 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2714 if (r < 0)
2715 return r;
2716 } else {
2717 r = neighbor_remove(neighbor, link, NULL);
2718 if (r < 0)
2719 return r;
2720 }
2721 }
2722
5e5b137a 2723 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2724 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2725 if (route->protocol == RTPROT_KERNEL)
2726 continue;
2727
bd7d6cec
YW		 2728 /* do not touch multicast route added by kernel */
2729 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2730 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2731 if (route->protocol == RTPROT_BOOT &&
2732 route->family == AF_INET6 &&
2733 route->dst_prefixlen == 8 &&
2734 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 }}} }))
2735 continue;
2736
b1b0b42e 2737 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2738 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2739 continue;
2740
b1b0b42e 2741 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2742 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2743 continue;
2744
7ecf0c3e 2745 if (link_is_static_route_configured(link, route)) {
f1368755 2746 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2747 if (r < 0)
2748 return r;
2749 } else {
4645ad47 2750 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2751 if (r < 0)
2752 return r;
2753 }
5e5b137a
TG		 2754 }
2755
2756 return 0;
2757}
2758
3104883d 2759static int link_drop_config(Link *link) {
410a7f15 2760 Address *address, *pool_address;
d1bdafd2 2761 Neighbor *neighbor;
3104883d
SS		 2762 Route *route;
2763 Iterator i;
2764 int r;
2765
2766 SET_FOREACH(address, link->addresses, i) {
2767 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2768 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2769 continue;
2770
63ae0569 2771 r = address_remove(address, link, NULL);
3104883d
SS		 2772 if (r < 0)
2773 return r;
410a7f15
RM		 2774
2775 /* If this address came from an address pool, clean up the pool */
2776 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2777 if (address_equal(address, pool_address)) {
2778 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2779 address_free(pool_address);
2780 break;
2781 }
2782 }
3104883d
SS		 2783 }
2784
d1bdafd2
WKI		 2785 SET_FOREACH(neighbor, link->neighbors, i) {
2786 r = neighbor_remove(neighbor, link, NULL);
2787 if (r < 0)
2788 return r;
2789 }
2790
3104883d
SS		 2791 SET_FOREACH(route, link->routes, i) {
2792 /* do not touch routes managed by the kernel */
2793 if (route->protocol == RTPROT_KERNEL)
2794 continue;
2795
4645ad47 2796 r = route_remove(route, link, NULL);
3104883d
SS		 2797 if (r < 0)
2798 return r;
2799 }
2800
c69305ff
LP		 2801 ndisc_flush(link);
2802
3104883d
SS		 2803 return 0;
2804}
2805
051e77ca
SS		 2806static int link_configure_ipv4_dad(Link *link) {
2807 Address *address;
2808 int r;
2809
2810 assert(link);
2811 assert(link->network);
2812
2813 LIST_FOREACH(addresses, address, link->network->static_addresses)
2814 if (address->family == AF_INET &&
2815 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2816 r = configure_ipv4_duplicate_address_detection(link, address);
2817 if (r < 0)
2818 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2819 }
2820
2821 return 0;
2822}
2823
34658df2
YW		 2824static int link_configure_traffic_control(Link *link) {
2825 TrafficControl *tc;
0f5bd7fe 2826 Iterator i;
02b59d57
TG		 2827 int r;
2828
34658df2
YW		 2829 link->tc_configured = false;
2830 link->tc_messages = 0;
4ecdcb07 2831
34658df2
YW		 2832 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section, i) {
2833 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2834 if (r < 0)
2835 return r;
2836 }
2837
34658df2
YW		 2838 if (link->tc_messages == 0)
2839 link->tc_configured = true;
4ecdcb07 2840 else
34658df2 2841 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2842
2843 return 0;
2844}
2845
518cd6b5
SS		 2846static int link_configure_sr_iov(Link *link) {
2847 SRIOV *sr_iov;
2848 Iterator i;
2849 int r;
2850
2851 link->sr_iov_configured = false;
2852 link->sr_iov_messages = 0;
2853
2854 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section, i) {
2855 r = sr_iov_configure(link, sr_iov);
2856 if (r < 0)
2857 return r;
2858 }
2859
2860 if (link->sr_iov_messages == 0)
2861 link->sr_iov_configured = true;
2862 else
2863 log_link_debug(link, "Configuring SR-IOV");
2864
2865 return 0;
2866}
2867
4ecdcb07
YW		 2868static int link_configure(Link *link) {
2869 int r;
2870
ef1ba606 2871 assert(link);
b22d8a00 2872 assert(link->network);
bd08ce56 2873 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2874
34658df2 2875 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2876 if (r < 0)
2877 return r;
2878
518cd6b5
SS		 2879 r = link_configure_sr_iov(link);
2880 if (r < 0)
2881 return r;
2882
500b96eb 2883 if (link->iftype == ARPHRD_CAN)
93ea7750 2884 return link_configure_can(link);
92c918b0 2885
482efedc
SS		 2886 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2887 * for this interface, then enable IPv6 */
57ad7607 2888 (void) link_update_ipv6_sysctl(link);
482efedc 2889
23d8b221
SS		 2890 r = link_set_proxy_arp(link);
2891 if (r < 0)
2892 return r;
2893
a0e5c15d
FK		 2894 r = ipv6_proxy_ndp_addresses_configure(link);
2895 if (r < 0)
2896 return r;
2897
769d324c
LP		 2898 r = link_set_ipv4_forward(link);
2899 if (r < 0)
2900 return r;
2901
2902 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2903 if (r < 0)
2904 return r;
2905
49092e22
SS		 2906 r = link_set_ipv6_privacy_extensions(link);
2907 if (r < 0)
2908 return r;
2909
4f2e437a
SS		 2910 r = link_set_ipv6_accept_ra(link);
2911 if (r < 0)
2912 return r;
2913
8749cbcd
SS		 2914 r = link_set_ipv6_dad_transmits(link);
2915 if (r < 0)
2916 return r;
b69c3180
SS		 2917
2918 r = link_set_ipv6_hop_limit(link);
2919 if (r < 0)
2920 return r;
8749cbcd 2921
94d76d07
YW		 2922 r = link_set_ipv4_accept_local(link);
2923 if (r < 0)
2924 return r;
2925
99d2baa2
SS		 2926 r = link_set_flags(link);
2927 if (r < 0)
2928 return r;
2929
89fe6535
SS		 2930 r = link_set_group(link);
2931 if (r < 0)
2932 return r;
2933
910feb78 2934 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2935 r = ipv4ll_configure(link);
eb34d4af
TG		 2936 if (r < 0)
2937 return r;
2938 }
2939
78c958f8 2940 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2941 r = dhcp4_set_promote_secondaries(link);
2942 if (r < 0)
2943 return r;
2944
3c9b8860 2945 r = dhcp4_configure(link);
eb34d4af
TG		 2946 if (r < 0)
2947 return r;
eb34d4af
TG		 2948 }
2949
78c958f8 2950 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2951 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2952 if (r < 0)
2953 return r;
2954
2955 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2956 if (r < 0)
2957 return r;
dd43110f
TG		 2958 }
2959
62379e88
TG		 2960 if (link_dhcp6_enabled(link) ||
2961 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2962 r = dhcp6_configure(link);
2963 if (r < 0)
2964 return r;
2965 }
2966
2967 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2968 r = ndisc_configure(link);
4138fb2c
PF		 2969 if (r < 0)
2970 return r;
2971 }
2972
7465dd22
PF		 2973 if (link_radv_enabled(link)) {
2974 r = radv_configure(link);
2975 if (r < 0)
2976 return r;
2977 }
2978
8e1ad1ea 2979 if (link_lldp_rx_enabled(link)) {
7f853950 2980 r = link_lldp_rx_configure(link);
273eec24
LP		 2981 if (r < 0)
2982 return r;
ce43e484
SS		 2983 }
2984
f6fcc1c2 2985 r = link_configure_mtu(link);
40288ece
YW		 2986 if (r < 0)
2987 return r;
44b598a1 2988
9f6e82e6
YW		 2989 r = link_configure_addrgen_mode(link);
2990 if (r < 0)
2991 return r;
0e2fdb83 2992
051e77ca
SS		 2993 r = link_configure_ipv4_dad(link);
2994 if (r < 0)
2995 return r;
2996
3a390124
DS		 2997 return link_configure_continue(link);
2998}
2999
3000/* The configuration continues in this separate function, instead of
3001 * including this in the above link_configure() function, for two
3002 * reasons:
3003 * 1) some devices reset the link when the mtu is set, which caused
3004 * an infinite loop here in networkd; see:
3005 * https://github.com/systemd/systemd/issues/6593
3006 * https://github.com/systemd/systemd/issues/9831
3007 * 2) if ipv6ll is disabled, then bringing the interface up must be
3008 * delayed until after we get confirmation from the kernel that
3009 * the addr_gen_mode parameter has been set (via netlink), see:
3010 * https://github.com/systemd/systemd/issues/13882
3011 */
3012static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3013 int r;
3014
3015 assert(link);
3016 assert(link->network);
bd08ce56 3017 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3018
9524014e 3019 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3020 return 0;
3021
4c649652
DS		 3022 /* Drop foreign config, but ignore loopback or critical devices.
3023 * We do not want to remove loopback address or addresses used for root NFS. */
3024 if (!(link->flags & IFF_LOOPBACK) &&
3025 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3026 r = link_drop_foreign_config(link);
3027 if (r < 0)
3028 return r;
3029 }
3030
d236718c
DS		 3031 /* The kernel resets ipv6 mtu after changing device mtu;
3032 * we must set this here, after we've set device mtu */
3033 r = link_set_ipv6_mtu(link);
3034 if (r < 0)
3035 return r;
3036
dad2d78e 3037 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3038 r = link_acquire_conf(link);
3039 if (r < 0)
3040 return r;
cc544d5f 3041 }
1e9be60b 3042
3f265037 3043 return link_enter_join_netdev(link);
505f8da7
TG		 3044}
3045
27dfc982
YW		 3046static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3047 assert(duid);
3048
3049 if (duid->raw_data_len > 0)
3050 return 0;
3051
3052 if (duid->type != DUID_TYPE_UUID)
3053 return -EINVAL;
3054
3055 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3056 duid->raw_data_len = sizeof(sd_id128_t);
3057
3058 return 1;
3059}
3060
3061int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3062 Manager *manager = userdata;
3063 const sd_bus_error *e;
3064 const void *a;
3065 size_t sz;
3066 DUID *duid;
3067 Link *link;
3068 int r;
3069
3070 assert(m);
3071 assert(manager);
3072
3073 e = sd_bus_message_get_error(m);
3074 if (e) {
3075 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3076 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3077 e->message);
3078 goto configure;
3079 }
3080
3081 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3082 if (r < 0)
3083 goto configure;
3084
3085 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3086 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3087 goto configure;
3088 }
3089
3090 memcpy(&manager->product_uuid, a, sz);
3091 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3092 (void) duid_set_uuid(duid, manager->product_uuid);
3093
3094 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3095
3096configure:
3097 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3098 link_unref(link);
3099
27dfc982
YW		 3100 r = link_configure(link);
3101 if (r < 0)
4ff296b0 3102 link_enter_failed(link);
27dfc982
YW		 3103 }
3104
3105 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3106
3107 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3108 * even if the method fails. */
3109 manager->has_product_uuid = true;
3110
3111 return 1;
3112}
3113
3114static bool link_requires_uuid(Link *link) {
3115 const DUID *duid;
3116
3117 assert(link);
3118 assert(link->manager);
3119 assert(link->network);
3120
3121 duid = link_get_duid(link);
3122 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3123 return false;
3124
3125 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3126 return true;
3127
3128 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3129 return true;
3130
3131 return false;
3132}
3133
3134static int link_configure_duid(Link *link) {
3135 Manager *m;
3136 DUID *duid;
3137 int r;
3138
3139 assert(link);
3140 assert(link->manager);
3141 assert(link->network);
3142
3143 m = link->manager;
3144 duid = link_get_duid(link);
3145
3146 if (!link_requires_uuid(link))
3147 return 1;
3148
3149 if (m->has_product_uuid) {
3150 (void) duid_set_uuid(duid, m->product_uuid);
3151 return 1;
3152 }
3153
3154 if (!m->links_requesting_uuid) {
3155 r = manager_request_product_uuid(m, link);
3156 if (r < 0) {
3157 if (r == -ENOMEM)
3158 return r;
3159
ab4dd984
ZJS		 3160 log_link_warning_errno(link, r,
3161 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3162 return 1;
3163 }
3164 } else {
3165 r = set_put(m->links_requesting_uuid, link);
3166 if (r < 0)
3167 return log_oom();
39dbd0c7
ZJS		 3168 if (r > 0)
3169 link_ref(link);
27dfc982
YW		 3170
3171 r = set_put(m->duids_requesting_uuid, duid);
3172 if (r < 0)
3173 return log_oom();
3174 }
3175
3176 return 0;
3177}
3178
572b21d9 3179static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3180 Network *network;
3181 int r;
3182
572b21d9
YW		 3183 if (m) {
3184 _cleanup_strv_free_ char **s = NULL;
3185
3186 r = sd_netlink_message_get_errno(m);
3187 if (r < 0)
3188 return r;
3189
3190 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3191 if (r < 0 && r != -ENODATA)
3192 return r;
3193
3194 strv_free_and_replace(link->alternative_names, s);
3195 }
3196
c643bda5
YW		 3197 r = network_get(link->manager, link->iftype, link->sd_device,
3198 link->ifname, link->alternative_names, link->driver,
3199 &link->mac, &link->permanent_mac,
3200 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3201 if (r == -ENOENT) {
3202 link_enter_unmanaged(link);
3203 return 0;
3204 } else if (r == 0 && network->unmanaged) {
3205 link_enter_unmanaged(link);
3206 return 0;
3207 } else if (r < 0)
3208 return r;
3209
99b8517c 3210 if (link->network == network && !force)
ad932b15
YW		 3211 return 0;
3212
3213 log_link_info(link, "Re-configuring with %s", network->filename);
3214
3215 /* Dropping old .network file */
3216 r = link_stop_clients(link, false);
572b21d9 3217 if (r < 0)
ad932b15 3218 return r;
ad932b15
YW		 3219
3220 if (link_dhcp4_server_enabled(link))
3221 (void) sd_dhcp_server_stop(link->dhcp_server);
3222
3223 r = link_drop_config(link);
3224 if (r < 0)
3225 return r;
3226
2c7b826d 3227 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3228 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3229 r = link_drop_foreign_config(link);
3230 if (r < 0)
3231 return r;
3232 }
3233
3234 link_free_carrier_maps(link);
3235 link_free_engines(link);
3236 link->network = network_unref(link->network);
3237
3238 /* Then, apply new .network file */
3239 r = network_apply(network, link);
3240 if (r < 0)
3241 return r;
3242
3243 r = link_new_carrier_maps(link);
3244 if (r < 0)
3245 return r;
3246
3247 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3248 link_dirty(link);
ad932b15
YW		 3249
3250 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3251 * link_configure() is called later asynchronously. */
3252 r = link_configure_duid(link);
3253 if (r <= 0)
3254 return r;
3255
3256 r = link_configure(link);
3257 if (r < 0)
3258 return r;
3259
3260 return 0;
3261}
3262
572b21d9
YW		 3263static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3264 int r;
3265
3266 r = link_reconfigure_internal(link, m, false);
3267 if (r < 0)
3268 link_enter_failed(link);
3269
3270 return 1;
3271}
3272
3273static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3274 int r;
3275
3276 r = link_reconfigure_internal(link, m, true);
3277 if (r < 0)
3278 link_enter_failed(link);
3279
3280 return 1;
3281}
3282
3283int link_reconfigure(Link *link, bool force) {
3284 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3285 int r;
3286
2c0d7ed3
YW		 3287 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3288 return 0;
3289
572b21d9
YW		 3290 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3291 link->ifindex);
3292 if (r < 0)
3293 return r;
3294
3295 r = netlink_call_async(link->manager->rtnl, NULL, req,
3296 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3297 link_netlink_destroy_callback, link);
3298 if (r < 0)
3299 return r;
3300
3301 link_ref(link);
3302
3303 return 0;
3304}
3305
e6bf7774 3306static int link_initialized_and_synced(Link *link) {
505f8da7 3307 Network *network;
505f8da7
TG		 3308 int r;
3309
3310 assert(link);
3311 assert(link->ifname);
3312 assert(link->manager);
3313
bd08ce56
YW		 3314 /* We may get called either from the asynchronous netlink callback,
3315 * or directly for link_add() if running in a container. See link_add(). */
3316 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3317 return 0;
505f8da7 3318
6a7a4e4d 3319 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3320 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3321
0d4ad91d
AR		 3322 r = link_new_bound_by_list(link);
3323 if (r < 0)
3324 return r;
3325
3326 r = link_handle_bound_by_list(link);
3327 if (r < 0)
3328 return r;
3329
c4a03a56 3330 if (!link->network) {
0894cfe4 3331 r = wifi_get_info(link);
8d968fdd
YW		 3332 if (r < 0)
3333 return r;
3334
c643bda5
YW		 3335 r = network_get(link->manager, link->iftype, link->sd_device,
3336 link->ifname, link->alternative_names, link->driver,
3337 &link->mac, &link->permanent_mac,
3338 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3339 if (r == -ENOENT) {
3340 link_enter_unmanaged(link);
4232cf04 3341 return 0;
a09dc546
DM		 3342 } else if (r == 0 && network->unmanaged) {
3343 link_enter_unmanaged(link);
3344 return 0;
c4a03a56
TG		 3345 } else if (r < 0)
3346 return r;
505f8da7 3347
c4a03a56
TG		 3348 if (link->flags & IFF_LOOPBACK) {
3349 if (network->link_local != ADDRESS_FAMILY_NO)
3350 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3351
c4a03a56
TG		 3352 if (network->dhcp != ADDRESS_FAMILY_NO)
3353 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3354
c4a03a56
TG		 3355 if (network->dhcp_server)
3356 log_link_debug(link, "Ignoring DHCP server for loopback link");
3357 }
bd2efe92 3358
7d342c03 3359 r = network_apply(network, link);
c4a03a56
TG		 3360 if (r < 0)
3361 return r;
3362 }
505f8da7 3363
0d4ad91d
AR		 3364 r = link_new_bound_to_list(link);
3365 if (r < 0)
3366 return r;
3367
27dfc982
YW		 3368 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3369 * link_configure() is called later asynchronously. */
3370 r = link_configure_duid(link);
3371 if (r <= 0)
3372 return r;
3373
a748b692
TG		 3374 r = link_configure(link);
3375 if (r < 0)
3376 return r;
3377
4232cf04 3378 return 0;
505f8da7
TG		 3379}
3380
302a796f 3381static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3382 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3383 int r;
3384
572b21d9
YW		 3385 r = sd_netlink_message_get_errno(m);
3386 if (r < 0) {
40681e5c 3387 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3388 link_enter_failed(link);
3389 return 0;
3390 }
3391
3392 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3393 if (r < 0 && r != -ENODATA) {
3394 link_enter_failed(link);
3395 return 0;
3396 }
3397
3398 strv_free_and_replace(link->alternative_names, s);
3399
4ff296b0
YW		 3400 r = link_initialized_and_synced(link);
3401 if (r < 0)
3402 link_enter_failed(link);
e6bf7774
YW		 3403 return 1;
3404}
3405
51517f9e 3406int link_initialized(Link *link, sd_device *device) {
4afd3348 3407 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3408 int r;
3409
3410 assert(link);
3411 assert(link->manager);
3412 assert(link->manager->rtnl);
3413 assert(device);
3414
8434fd5c 3415 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3416 return 0;
3417
51517f9e 3418 if (link->sd_device)
679b3605
TG		 3419 return 0;
3420
79008bdd 3421 log_link_debug(link, "udev initialized link");
bd08ce56 3422 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3423
51517f9e 3424 link->sd_device = sd_device_ref(device);
4f561e8e 3425
3c9b8860
TG		 3426 /* udev has initialized the link, but we don't know if we have yet
3427 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3428 * when it returns we know that the pending NEWLINKs have already been
3429 * processed and that we are up-to-date */
4f561e8e 3430
3c9b8860
TG		 3431 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3432 link->ifindex);
4f561e8e
TG		 3433 if (r < 0)
3434 return r;
3435
302a796f
YW		 3436 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3437 link_netlink_destroy_callback, link);
4f561e8e
TG		 3438 if (r < 0)
3439 return r;
3440
5da8149f
TG		 3441 link_ref(link);
3442
4f561e8e
TG		 3443 return 0;
3444}
3445
c4a03a56 3446static int link_load(Link *link) {
0bc70f1d
TG		 3447 _cleanup_free_ char *network_file = NULL,
3448 *addresses = NULL,
f703cc2c 3449 *routes = NULL,
0bc70f1d
TG		 3450 *dhcp4_address = NULL,
3451 *ipv4ll_address = NULL;
3452 union in_addr_union address;
c598ac76 3453 const char *p;
c4a03a56
TG		 3454 int r;
3455
3456 assert(link);
3457
aa8fbc74 3458 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3459 "NETWORK_FILE", &network_file,
3460 "ADDRESSES", &addresses,
f703cc2c 3461 "ROUTES", &routes,
0bc70f1d 3462 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3463 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3464 if (r < 0 && r != -ENOENT)
3465 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3466
3467 if (network_file) {
3468 Network *network;
3469 char *suffix;
3470
3471 /* drop suffix */
3472 suffix = strrchr(network_file, '.');
3473 if (!suffix) {
3474 log_link_debug(link, "Failed to get network name from %s", network_file);
3475 goto network_file_fail;
3476 }
3477 *suffix = '\0';
3478
3479 r = network_get_by_name(link->manager, basename(network_file), &network);
3480 if (r < 0) {
3481 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3482 goto network_file_fail;
3483 }
3484
7d342c03 3485 r = network_apply(network, link);
c4a03a56
TG		 3486 if (r < 0)
3487 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3488 }
3489
3490network_file_fail:
3491
3492 if (addresses) {
c598ac76 3493 p = addresses;
c4a03a56 3494
c598ac76
TG		 3495 for (;;) {
3496 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3497 char *prefixlen_str;
3498 int family;
3499 unsigned char prefixlen;
c4a03a56 3500
c598ac76
TG		 3501 r = extract_first_word(&p, &address_str, NULL, 0);
3502 if (r < 0) {
3503 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3504 continue;
928bc597
TA		 3505 }
3506 if (r == 0)
c598ac76
TG		 3507 break;
3508
3509 prefixlen_str = strchr(address_str, '/');
c4a03a56 3510 if (!prefixlen_str) {
c598ac76 3511 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3512 continue;
3513 }
3514
313cefa1 3515 *prefixlen_str++ = '\0';
c4a03a56
TG		 3516
3517 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3518 if (r != 1) {
3519 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3520 continue;
3521 }
3522
c598ac76 3523 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3524 if (r < 0) {
c598ac76 3525 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3526 continue;
3527 }
3528
3529 r = address_add(link, family, &address, prefixlen, NULL);
3530 if (r < 0)
3531 return log_link_error_errno(link, r, "Failed to add address: %m");
3532 }
3533 }
3534
f703cc2c 3535 if (routes) {
74544b4e
TA		 3536 p = routes;
3537
c598ac76 3538 for (;;) {
4afd3348 3539 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f1368755
YW		 3540 _cleanup_(route_freep) Route *tmp = NULL;
3541 _cleanup_free_ char *route_str = NULL;
f703cc2c 3542 char *prefixlen_str;
f1368755 3543 Route *route;
f703cc2c 3544
c598ac76
TG		 3545 r = extract_first_word(&p, &route_str, NULL, 0);
3546 if (r < 0) {
3547 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3548 continue;
928bc597
TA		 3549 }
3550 if (r == 0)
c598ac76
TG		 3551 break;
3552
3553 prefixlen_str = strchr(route_str, '/');
f703cc2c 3554 if (!prefixlen_str) {
c598ac76 3555 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3556 continue;
3557 }
3558
313cefa1 3559 *prefixlen_str++ = '\0';
f703cc2c 3560
f1368755
YW		 3561 r = route_new(&tmp);
3562 if (r < 0)
3563 return log_oom();
3564
3565 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT, &tmp->dst_prefixlen, &tmp->tos, &tmp->priority, &tmp->table, &tmp->lifetime);
f833694d
TG		 3566 if (r != 5) {
3567 log_link_debug(link,
3568 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3569 prefixlen_str);
f703cc2c
TG		 3570 continue;
3571 }
3572
f1368755 3573 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
f703cc2c 3574 if (r < 0) {
c598ac76 3575 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3576 continue;
3577 }
3578
f1368755 3579 r = route_add(link, tmp, &route);
f703cc2c
TG		 3580 if (r < 0)
3581 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3582
f1368755
YW		 3583 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3584 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), route->lifetime,
f833694d
TG		 3585 0, route_expire_handler, route);
3586 if (r < 0)
3587 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3588 }
3589
f833694d 3590 sd_event_source_unref(route->expire);
1cc6c93a 3591 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3592 }
3593 }
3594
0bc70f1d
TG		 3595 if (dhcp4_address) {
3596 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3597 if (r < 0) {
b68d26b8 3598 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3599 goto dhcp4_address_fail;
3600 }
3601
b1c626f6 3602 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3603 if (r < 0)
b68d26b8 3604 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3605
1b43e246
DS		 3606 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3607 if (r < 0)
3608 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3609
0bc70f1d
TG		 3610 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3611 if (r < 0)
b68d26b8 3612 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3613 }
3614
3615dhcp4_address_fail:
3616
3617 if (ipv4ll_address) {
3618 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3619 if (r < 0) {
b68d26b8 3620 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3621 goto ipv4ll_address_fail;
3622 }
3623
3624 r = sd_ipv4ll_new(&link->ipv4ll);
3625 if (r < 0)
b68d26b8 3626 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3627
1b43e246
DS		 3628 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3629 if (r < 0)
3630 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3631
0bc70f1d
TG		 3632 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3633 if (r < 0)
b68d26b8 3634 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3635 }
3636
3637ipv4ll_address_fail:
3638
c4a03a56
TG		 3639 return 0;
3640}
3641
1c4baffc 3642int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3643 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3644 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3645 Link *link;
5a937ea2 3646 int r;
505f8da7
TG		 3647
3648 assert(m);
fbbeb65a 3649 assert(m->rtnl);
505f8da7
TG		 3650 assert(message);
3651 assert(ret);
3652
3653 r = link_new(m, message, ret);
3654 if (r < 0)
3655 return r;
3656
3657 link = *ret;
3658
6a7a4e4d 3659 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3660
c4a03a56
TG		 3661 r = link_load(link);
3662 if (r < 0)
3663 return r;
3664
bf331d87
YW		 3665 if (path_is_read_only_fs("/sys") <= 0) {
3666 /* udev should be around */
ae06ab10 3667 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3668 r = sd_device_new_from_device_id(&device, ifindex_str);
3669 if (r < 0) {
4d59e14f
YW		 3670 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3671 return 0;
5c416fc4 3672 }
505f8da7 3673
5a937ea2 3674 r = sd_device_get_is_initialized(device);
51517f9e 3675 if (r < 0) {
bf331d87 3676 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3677 goto failed;
3678 }
5a937ea2 3679 if (r == 0) {
505f8da7 3680 /* not yet ready */
79008bdd 3681 log_link_debug(link, "link pending udev initialization...");
505f8da7 3682 return 0;
3c4cb064 3683 }
505f8da7 3684
299ad32d
YW		 3685 r = device_is_renaming(device);
3686 if (r < 0) {
bf331d87 3687 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3688 goto failed;
3689 }
3690 if (r > 0) {
bf331d87 3691 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3692 return 0;
3693 }
3694
4f561e8e
TG		 3695 r = link_initialized(link, device);
3696 if (r < 0)
5c416fc4 3697 goto failed;
4f561e8e 3698 } else {
e6bf7774 3699 r = link_initialized_and_synced(link);
4f561e8e 3700 if (r < 0)
5c416fc4 3701 goto failed;
4f561e8e 3702 }
505f8da7 3703
a748b692 3704 return 0;
5c416fc4
TG		 3705failed:
3706 link_enter_failed(link);
3707 return r;
a748b692
TG		 3708}
3709
c601ebf7 3710int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3711 int r;
3712
3713 assert(link);
3714
3715 log_link_info(link, "Gained IPv6LL");
3716
c601ebf7 3717 link->ipv6ll_address = *address;
e7ab854c
TG		 3718 link_check_ready(link);
3719
b9ea3d2e 3720 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3721 r = link_acquire_ipv6_conf(link);
3722 if (r < 0) {
3723 link_enter_failed(link);
3724 return r;
3725 }
3726 }
3727
3728 return 0;
3729}
3730
9c0a72f9
TG		 3731static int link_carrier_gained(Link *link) {
3732 int r;
3733
3734 assert(link);
3735
0894cfe4 3736 r = wifi_get_info(link);
8d968fdd
YW		 3737 if (r < 0)
3738 return r;
3739 if (r > 0) {
572b21d9
YW		 3740 r = link_reconfigure_internal(link, NULL, false);
3741 if (r < 0) {
3742 link_enter_failed(link);
8d968fdd 3743 return r;
572b21d9 3744 }
8d968fdd
YW		 3745 }
3746
b9ea3d2e 3747 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3748 r = link_acquire_conf(link);
3749 if (r < 0) {
3750 link_enter_failed(link);
3751 return r;
3752 }
6fc25497 3753
b425c3ae 3754 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3755 r = link_request_set_addresses(link);
6fc25497
SS		 3756 if (r < 0)
3757 return r;
9c0a72f9
TG		 3758 }
3759
0d4ad91d
AR		 3760 r = link_handle_bound_by_list(link);
3761 if (r < 0)
3762 return r;
3763
9c0a72f9
TG		 3764 return 0;
3765}
3766
3767static int link_carrier_lost(Link *link) {
3768 int r;
3769
3770 assert(link);
3771
25e992ba 3772 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3773 return 0;
3774
fbdb6605 3775 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3776 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3777 * configuration and stop the clients as well. */
97e7fb39
SS		 3778 if (link->setting_mtu)
3779 return 0;
3780
95355a28 3781 r = link_stop_clients(link, false);
9c0a72f9
TG		 3782 if (r < 0) {
3783 link_enter_failed(link);
3784 return r;
3785 }
3786
28464ae0
SS		 3787 if (link_dhcp4_server_enabled(link))
3788 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3789
3104883d
SS		 3790 r = link_drop_config(link);
3791 if (r < 0)
3792 return r;
3793
2c7b826d 3794 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3795 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3796 r = link_drop_foreign_config(link);
3797 if (r < 0)
3798 return r;
3799 }
3104883d 3800
0d4ad91d
AR		 3801 r = link_handle_bound_by_list(link);
3802 if (r < 0)
3803 return r;
3804
9c0a72f9
TG		 3805 return 0;
3806}
3807
3808int link_carrier_reset(Link *link) {
3809 int r;
3810
3811 assert(link);
3812
3813 if (link_has_carrier(link)) {
3814 r = link_carrier_lost(link);
3815 if (r < 0)
3816 return r;
3817
3818 r = link_carrier_gained(link);
3819 if (r < 0)
3820 return r;
3821
6a7a4e4d 3822 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3823 }
3824
3825 return 0;
3826}
3827
d236718c
DS		 3828/* This is called every time an interface admin state changes to up;
3829 * specifically, when IFF_UP flag changes from unset to set */
3830static int link_admin_state_up(Link *link) {
3831 int r;
3832
3833 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3834 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3835 * ipv6_mtu_set prevents this from trying to set it too early before
3836 * the link->network has been setup; we only need to reset it
3837 * here if we've already set it during normal initialization. */
3838 if (link->ipv6_mtu_set) {
3839 r = link_set_ipv6_mtu(link);
3840 if (r < 0)
3841 return r;
3842 }
3843
3844 return 0;
3845}
3846
1c4baffc 3847int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3848 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3849 struct ether_addr mac;
ca4e095a 3850 const char *ifname;
afe7fd56 3851 uint32_t mtu;
d236718c 3852 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3853 int old_master, r;
22936833 3854
dd3efc09 3855 assert(link);
b8941f74 3856 assert(link->ifname);
22936833
TG		 3857 assert(m);
3858
7619683b 3859 if (link->state == LINK_STATE_LINGER) {
5238e957 3860 log_link_info(link, "Link re-added");
289e6774 3861 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3862
3863 r = link_new_carrier_maps(link);
3864 if (r < 0)
3865 return r;
7619683b
TG		 3866 }
3867
1c4baffc 3868 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3869 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3870 Manager *manager = link->manager;
b8941f74 3871
30de2b89 3872 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3873
30de2b89
YW		 3874 link_drop(link);
3875 r = link_add(manager, m, &link);
3876 if (r < 0)
3877 return r;
b8941f74
TG		 3878 }
3879
572b21d9
YW		 3880 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3881 if (r >= 0)
3882 strv_free_and_replace(link->alternative_names, s);
3883
1c4baffc 3884 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3885 if (r >= 0 && mtu > 0) {
3886 link->mtu = mtu;
4e964aa0 3887 if (link->original_mtu == 0) {
afe7fd56 3888 link->original_mtu = mtu;
6a7a4e4d 3889 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3890 }
3891
3892 if (link->dhcp_client) {
3c9b8860
TG		 3893 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3894 link->mtu);
fc95c359
YW		 3895 if (r < 0)
3896 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3897 }
7465dd22
PF		 3898
3899 if (link->radv) {
3900 r = sd_radv_set_mtu(link->radv, link->mtu);
3901 if (r < 0)
3902 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3903 }
9842de0d 3904 }
69629de9 3905
e9189a1f
TG		 3906 /* The kernel may broadcast NEWLINK messages without the MAC address
3907 set, simply ignore them. */
1c4baffc 3908 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3909 if (r >= 0) {
3c9b8860
TG		 3910 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3911 ETH_ALEN)) {
c49b33ac 3912
3c9b8860
TG		 3913 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3914 ETH_ALEN);
c49b33ac 3915
79008bdd 3916 log_link_debug(link, "MAC address: "
20861203
TG		 3917 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3918 mac.ether_addr_octet[0],
3919 mac.ether_addr_octet[1],
3920 mac.ether_addr_octet[2],
3921 mac.ether_addr_octet[3],
3922 mac.ether_addr_octet[4],
3923 mac.ether_addr_octet[5]);
c49b33ac 3924
20861203
TG		 3925 if (link->ipv4ll) {
3926 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3927 if (r < 0)
3928 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3929 }
c49b33ac 3930
20861203 3931 if (link->dhcp_client) {
3c9b8860 3932 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3933 (const uint8_t *) &link->mac,
3934 sizeof (link->mac),
3935 ARPHRD_ETHER);
6a7a4e4d
LP		 3936 if (r < 0)
3937 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3938
fff1f40c
YW		 3939 r = dhcp4_set_client_identifier(link);
3940 if (r < 0)
3941 return r;
c49b33ac 3942 }
4138fb2c
PF		 3943
3944 if (link->dhcp6_client) {
f24648a6 3945 const DUID* duid = link_get_duid(link);
8341a5c3 3946
4138fb2c 3947 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3948 (const uint8_t *) &link->mac,
3949 sizeof (link->mac),
3950 ARPHRD_ETHER);
6a7a4e4d
LP		 3951 if (r < 0)
3952 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3953
8217ed5e
TH		 3954 if (link->network->iaid_set) {
3955 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3956 link->network->iaid);
3957 if (r < 0)
3958 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3959 }
413708d1 3960
8341a5c3
ZJS		 3961 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3962 duid->type,
3963 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3964 duid->raw_data_len);
413708d1
VK		 3965 if (r < 0)
3966 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3967 }
7465dd22
PF		 3968
3969 if (link->radv) {
3970 r = sd_radv_set_mac(link->radv, &link->mac);
3971 if (r < 0)
3972 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3973 }
420d2058
SS		 3974
3975 if (link->ndisc) {
3976 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3977 if (r < 0)
3978 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3979 }
c49b33ac 3980 }
4f882b2a
TG		 3981 }
3982
bb262ef0
YW		 3983 old_master = link->master_ifindex;
3984 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3985
d236718c 3986 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3987 had_carrier = link_has_carrier(link);
3988
bb262ef0 3989 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3990 if (r < 0)
3991 return r;
3992
d236718c
DS		 3993 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3994 log_link_info(link, "Link UP");
3995
3996 r = link_admin_state_up(link);
3997 if (r < 0)
3998 return r;
3999 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4000 log_link_info(link, "Link DOWN");
4001
273eec24
LP		 4002 r = link_update_lldp(link);
4003 if (r < 0)
4004 return r;
4005
a61bb41c
TG		 4006 carrier_gained = !had_carrier && link_has_carrier(link);
4007 carrier_lost = had_carrier && !link_has_carrier(link);
4008
4009 if (carrier_gained) {
6a7a4e4d 4010 log_link_info(link, "Gained carrier");
a61bb41c 4011
9c0a72f9
TG		 4012 r = link_carrier_gained(link);
4013 if (r < 0)
4014 return r;
a61bb41c 4015 } else if (carrier_lost) {
6a7a4e4d 4016 log_link_info(link, "Lost carrier");
a61bb41c 4017
9c0a72f9
TG		 4018 r = link_carrier_lost(link);
4019 if (r < 0)
a61bb41c 4020 return r;
a61bb41c
TG		 4021 }
4022
4023 return 0;
dd3efc09 4024}
fe8db0c5 4025
b295beea
LP		 4026static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4027 bool space = false;
4028 Iterator i;
4029 Link *link;
4030
4031 assert(f);
4032 assert(prefix);
4033
4034 if (hashmap_isempty(h))
4035 return;
4036
0d536673 4037 fputs(prefix, f);
b295beea
LP		 4038 HASHMAP_FOREACH(link, h, i) {
4039 if (space)
0d536673 4040 fputc(' ', f);
b295beea
LP		 4041
4042 fprintf(f, "%i", link->ifindex);
4043 space = true;
4044 }
4045
0d536673 4046 fputc('\n', f);
b295beea
LP		 4047}
4048
15761549 4049static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
dddc8d1e 4050 for (unsigned j = 0; j < n_dns; j++) {
15761549 4051 _cleanup_free_ char *b = NULL;
dddc8d1e 4052 int r;
15761549
YW		 4053
4054 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
4055 if (r < 0) {
4056 log_debug_errno(r, "Failed to format address, ignoring: %m");
4057 continue;
4058 }
4059
4060 if (*space)
4061 fputc(' ', f);
4062 fputs(b, f);
4063 *space = true;
4064 }
4065}
4066
d5e172d2
ZJS		 4067static void serialize_addresses(
4068 FILE *f,
4069 const char *lvalue,
4070 bool *space,
4071 char **addresses,
4072 sd_dhcp_lease *lease,
4073 bool conditional,
ddb82ec2 4074 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4075 sd_dhcp6_lease *lease6,
4076 bool conditional6,
4077 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4078 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4079 int r;
4080
4081 bool _space = false;
4082 if (!space)
4083 space = &_space;
4084
4085 if (lvalue)
4086 fprintf(f, "%s=", lvalue);
4087 fputstrv(f, addresses, NULL, space);
4088
4089 if (lease && conditional) {
4090 const struct in_addr *lease_addresses;
4091
4092 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4093 if (r > 0)
d8bff5cc 4094 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4095 }
4096
4097 if (lease6 && conditional6 && lease6_get_addr) {
4098 const struct in6_addr *in6_addrs;
4099
4100 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4101 if (r > 0)
4102 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4103 }
4104
4105 if (lease6 && conditional6 && lease6_get_fqdn) {
4106 char **in6_hosts;
4107
4108 r = lease6_get_fqdn(lease6, &in6_hosts);
4109 if (r > 0)
4110 fputstrv(f, in6_hosts, NULL, space);
4111 }
4112
4113 if (lvalue)
4114 fputc('\n', f);
4115}
4116
fe8db0c5 4117int link_save(Link *link) {
d361b373 4118 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4119 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4120 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4121 Route *route;
18d8a2cf 4122 Address *a;
e7780c8d 4123 Iterator i;
fe8db0c5
TG		 4124 int r;
4125
4126 assert(link);
4127 assert(link->state_file);
68a8723c 4128 assert(link->lease_file);
bbf7c048
TG		 4129 assert(link->manager);
4130
370e9930 4131 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4132 (void) unlink(link->state_file);
370e9930
TG		 4133 return 0;
4134 }
4135
34437b4f
LP		 4136 link_lldp_save(link);
4137
deb2e523
TG		 4138 admin_state = link_state_to_string(link->state);
4139 assert(admin_state);
4140
e375dcde
TG		 4141 oper_state = link_operstate_to_string(link->operstate);
4142 assert(oper_state);
deb2e523 4143
ac999bf0
YW		 4144 carrier_state = link_carrier_state_to_string(link->carrier_state);
4145 assert(carrier_state);
4146
4147 address_state = link_address_state_to_string(link->address_state);
4148 assert(address_state);
4149
fe8db0c5
TG		 4150 r = fopen_temporary(link->state_file, &f, &temp_path);
4151 if (r < 0)
6a7a4e4d 4152 goto fail;
fe8db0c5 4153
5512a963 4154 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4155
4156 fprintf(f,
4157 "# This is private data. Do not parse.\n"
deb2e523 4158 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4159 "OPER_STATE=%s\n"
4160 "CARRIER_STATE=%s\n"
4161 "ADDRESS_STATE=%s\n",
4162 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4163
bcb7a07e 4164 if (link->network) {
fe0e16db
YW		 4165 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4166 const char *dhcp_domainname = NULL, *p;
07bdc70d 4167 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 4168 bool space;
07bdc70d 4169
c1a38904
MTL		 4170 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4171 yes_no(link->network->required_for_online));
4172
d5e172d2
ZJS		 4173 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4174 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4175 strempty(link_operstate_to_string(st.min)),
4176 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4177 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4178
07bdc70d 4179 if (link->dhcp6_client) {
4058d339
TG		 4180 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4181 if (r < 0 && r != -ENOMSG)
2206aa5c 4182 log_link_debug_errno(link, r, "Failed to get DHCPv6 lease: %m");
07bdc70d 4183 }
b0e39c82 4184
adc5b2e2
TG		 4185 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4186
d5e172d2
ZJS		 4187 /************************************************************/
4188
0d536673 4189 fputs("DNS=", f);
ea352b40 4190 space = false;
15761549
YW		 4191 if (link->n_dns != (unsigned) -1)
4192 link_save_dns(f, link->dns, link->n_dns, &space);
4193 else
4194 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 4195
d5e172d2
ZJS		 4196 serialize_addresses(f, NULL, &space,
4197 NULL,
4198 link->dhcp_lease,
4199 link->network->dhcp_use_dns,
ddb82ec2 4200 SD_DHCP_LEASE_DNS,
d5e172d2
ZJS		 4201 dhcp6_lease,
4202 link->network->dhcp6_use_dns,
4203 sd_dhcp6_lease_get_dns,
4204 NULL);
1e7a0e21
LP		 4205
4206 /* Make sure to flush out old entries before we use the NDISC data */
4207 ndisc_vacuum(link);
4208
b296797f 4209 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4210 NDiscRDNSS *dd;
4211
d8bff5cc
ZJS		 4212 SET_FOREACH(dd, link->ndisc_rdnss, i)
4213 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4214 }
4215
4216 fputc('\n', f);
4217
d5e172d2
ZJS		 4218 /************************************************************/
4219
4220 serialize_addresses(f, "NTP", NULL,
4221 link->ntp ?: link->network->ntp,
4222 link->dhcp_lease,
4223 link->network->dhcp_use_ntp,
ddb82ec2 4224 SD_DHCP_LEASE_NTP,
d5e172d2
ZJS		 4225 dhcp6_lease,
4226 link->network->dhcp6_use_ntp,
4227 sd_dhcp6_lease_get_ntp_addrs,
4228 sd_dhcp6_lease_get_ntp_fqdn);
4229
4230 serialize_addresses(f, "SIP", NULL,
2a71d57f 4231 NULL,
d5e172d2
ZJS		 4232 link->dhcp_lease,
4233 link->network->dhcp_use_sip,
ddb82ec2 4234 SD_DHCP_LEASE_SIP,
2a71d57f 4235 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4236
4237 /************************************************************/
bd8f6538 4238
b2a81c0b 4239 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4240 if (link->dhcp_lease) {
b2a81c0b 4241 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4242 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4243 }
b2a81c0b
LP		 4244 if (dhcp6_lease)
4245 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4246 }
4247
fe0e16db
YW		 4248 fputs("DOMAINS=", f);
4249 space = false;
15761549 4250 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 4251 fputs_with_space(f, p, NULL, &space);
07bdc70d 4252
1e7a0e21 4253 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4254 if (dhcp_domainname)
4255 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4256 if (dhcp_domains)
4257 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4258 if (dhcp6_domains)
4259 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4260 }
4261
4262 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4263 NDiscDNSSL *dd;
1e7a0e21
LP		 4264
4265 SET_FOREACH(dd, link->ndisc_dnssl, i)
4266 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4267 }
b2a81c0b 4268
0d536673 4269 fputc('\n', f);
6192b846 4270
d5e172d2
ZJS		 4271 /************************************************************/
4272
fe0e16db
YW		 4273 fputs("ROUTE_DOMAINS=", f);
4274 space = false;
15761549 4275 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 4276 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4277
1e7a0e21 4278 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4279 if (dhcp_domainname)
4280 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4281 if (dhcp_domains)
4282 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4283 if (dhcp6_domains)
4284 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4285 }
4286
4287 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4288 NDiscDNSSL *dd;
1e7a0e21
LP		 4289
4290 SET_FOREACH(dd, link->ndisc_dnssl, i)
4291 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4292 }
b2a81c0b 4293
0d536673 4294 fputc('\n', f);
67272d15 4295
d5e172d2
ZJS		 4296 /************************************************************/
4297
3c9b8860 4298 fprintf(f, "LLMNR=%s\n",
15761549 4299 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4300
4301 /************************************************************/
4302
aaa297d4 4303 fprintf(f, "MDNS=%s\n",
15761549 4304 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4305
d5e172d2
ZJS		 4306 /************************************************************/
4307
4308 int dns_default_route =
4309 link->dns_default_route >= 0 ? link->dns_default_route :
4310 link->network->dns_default_route;
4311 if (dns_default_route >= 0)
4312 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4313
4314 /************************************************************/
4315
4316 DnsOverTlsMode dns_over_tls_mode =
4317 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4318 link->network->dns_over_tls_mode;
4319 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4320 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4321
4322 /************************************************************/
4323
4324 DnssecMode dnssec_mode =
4325 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4326 link->network->dnssec_mode;
4327 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4328 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4329
4330 /************************************************************/
4331
4332 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4333 if (set_isempty(nta_anchors))
4334 nta_anchors = link->network->dnssec_negative_trust_anchors;
4335
4336 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4337 const char *n;
4338
0d536673 4339 fputs("DNSSEC_NTA=", f);
8a516214 4340 space = false;
d5e172d2 4341 SET_FOREACH(n, nta_anchors, i)
d390f8ef 4342 fputs_with_space(f, n, NULL, &space);
0d536673 4343 fputc('\n', f);
8a516214
LP		 4344 }
4345
d5e172d2
ZJS		 4346 /************************************************************/
4347
0d536673 4348 fputs("ADDRESSES=", f);
e7780c8d
TG		 4349 space = false;
4350 SET_FOREACH(a, link->addresses, i) {
4351 _cleanup_free_ char *address_str = NULL;
4352
4353 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4354 if (r < 0)
4355 goto fail;
4356
e7780c8d
TG		 4357 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4358 space = true;
4359 }
0d536673 4360 fputc('\n', f);
c1eb9872 4361
d5e172d2
ZJS		 4362 /************************************************************/
4363
0d536673 4364 fputs("ROUTES=", f);
c1eb9872
TG		 4365 space = false;
4366 SET_FOREACH(route, link->routes, i) {
4367 _cleanup_free_ char *route_str = NULL;
4368
4369 r = in_addr_to_string(route->family, &route->dst, &route_str);
4370 if (r < 0)
4371 goto fail;
4372
ecc3f340
ZJS		 4373 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4374 space ? " " : "", route_str,
f833694d 4375 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4376 space = true;
4377 }
4378
0d536673 4379 fputc('\n', f);
bcb7a07e 4380 }
7374f9d8 4381
b295beea
LP		 4382 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4383 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4384
8eb9058d 4385 if (link->dhcp_lease) {
bd91b83e 4386 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4387 if (r < 0)
c2d6bd61 4388 goto fail;
fe8db0c5 4389
7374f9d8 4390 fprintf(f,
b0e39c82
TG		 4391 "DHCP_LEASE=%s\n",
4392 link->lease_file);
deb2e523 4393 } else
6990fb6b 4394 (void) unlink(link->lease_file);
fe8db0c5 4395
0bc70f1d
TG		 4396 if (link->ipv4ll) {
4397 struct in_addr address;
4398
4399 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4400 if (r >= 0) {
0d536673 4401 fputs("IPV4LL_ADDRESS=", f);
072320ea 4402 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4403 fputc('\n', f);
0bc70f1d
TG		 4404 }
4405 }
4406
7e738e7b
SS		 4407 if (link->dhcp6_client) {
4408 _cleanup_free_ char *duid = NULL;
4409 uint32_t iaid;
4410
4411 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4412 if (r >= 0)
4413 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4414
4415 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4416 if (r >= 0)
4417 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4418 }
18d8a2cf 4419
c2d6bd61
LP		 4420 r = fflush_and_check(f);
4421 if (r < 0)
4422 goto fail;
fe8db0c5 4423
c2d6bd61 4424 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4425 r = -errno;
c2d6bd61 4426 goto fail;
fe8db0c5
TG		 4427 }
4428
c2d6bd61 4429 return 0;
dacd6cee 4430
c2d6bd61 4431fail:
6a7a4e4d 4432 (void) unlink(link->state_file);
6a7a4e4d
LP		 4433 if (temp_path)
4434 (void) unlink(temp_path);
4435
dacd6cee 4436 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4437}
4438
84de38c5
TG		 4439/* The serialized state in /run is no longer up-to-date. */
4440void link_dirty(Link *link) {
4441 int r;
4442
4443 assert(link);
4444
0c241a37
SS		 4445 /* mark manager dirty as link is dirty */
4446 manager_dirty(link->manager);
4447
de7fef4b 4448 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4449 if (r <= 0)
de7fef4b 4450 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4451 return;
84de38c5
TG		 4452 link_ref(link);
4453}
4454
4455/* The serialized state in /run is up-to-date */
4456void link_clean(Link *link) {
4457 assert(link);
4458 assert(link->manager);
4459
1046bf9b 4460 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4461}
4462
fe8db0c5 4463static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4464 [LINK_STATE_PENDING] = "pending",
bd08ce56 4465 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4466 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4467 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4468 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4469 [LINK_STATE_FAILED] = "failed",
370e9930 4470 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4471};
4472
4473DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4474
4475int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4476 const char *err_msg = NULL;
4477
4478 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
ab119e63
YW		 4479 return log_link_full(link, level, err,
4480 "%s: %s%s%s%m",
4481 msg,
4482 strempty(err_msg),
4483 err_msg && !endswith(err_msg, ".") ? "." : "",
4484 err_msg ? " " : "");
5ecb131d 4485}
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