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systemctl: do not suggest passing --all if the user passed --state=
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
4cc7a82c 5#include <unistd.h>
f579559b 6
b5efdb8a 7#include "alloc-util.h"
1346b1f0 8#include "bus-util.h"
27dfc982 9#include "dhcp-identifier.h"
bd91b83e 10#include "dhcp-lease-internal.h"
686d13b9 11#include "env-file.h"
3ffd4af2 12#include "fd-util.h"
cf1d700d 13#include "fileio.h"
ef118d00 14#include "missing_network.h"
4799f19e 15#include "netdev/bond.h"
9a81f119 16#include "netdev/bridge.h"
f410d463 17#include "netdev/ipvlan.h"
bdb9f580 18#include "netdev/vrf.h"
cf1d700d 19#include "netlink-util.h"
c6f7c917 20#include "network-internal.h"
3ddcbeea 21#include "networkd-can.h"
8fcf1d61 22#include "networkd-dhcp-server.h"
ca5ad760
YW		 23#include "networkd-dhcp4.h"
24#include "networkd-dhcp6.h"
25#include "networkd-ipv4ll.h"
a0e5c15d 26#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 27#include "networkd-link-bus.h"
28#include "networkd-link.h"
8e1ad1ea 29#include "networkd-lldp-tx.h"
23f53b99 30#include "networkd-manager.h"
1e7a0e21 31#include "networkd-ndisc.h"
e4a71bf3 32#include "networkd-neighbor.h"
7465dd22 33#include "networkd-radv.h"
bce67bbe 34#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 35#include "set.h"
36#include "socket-util.h"
15a5e950 37#include "stdio-util.h"
8b43440b 38#include "string-table.h"
51517f9e 39#include "strv.h"
62e021a9 40#include "sysctl-util.h"
e4de7287 41#include "tmpfile-util.h"
299ad32d 42#include "udev-util.h"
cf1d700d
TG		 43#include "util.h"
44#include "virt.h"
fc2f9534 45
bdb9f580
YW		 46uint32_t link_get_vrf_table(Link *link) {
47 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
48}
49
50uint32_t link_get_dhcp_route_table(Link *link) {
51 /* When the interface is part of an VRF use the VRFs routing table, unless
52 * another table is explicitly specified. */
53 if (link->network->dhcp_route_table_set)
54 return link->network->dhcp_route_table;
55 return link_get_vrf_table(link);
56}
57
58uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
59 if (link->network->ipv6_accept_ra_route_table_set)
60 return link->network->ipv6_accept_ra_route_table;
61 return link_get_vrf_table(link);
62}
63
f24648a6
YW		 64DUID* link_get_duid(Link *link) {
65 if (link->network->duid.type != _DUID_TYPE_INVALID)
66 return &link->network->duid;
67 else
68 return &link->manager->duid;
69}
70
bafa9641
YW		 71int link_sysctl_ipv6_enabled(Link *link) {
72 _cleanup_free_ char *value = NULL;
73 int r;
74
593aee8f
YW		 75 assert(link);
76 assert(link->ifname);
77
78 if (link->sysctl_ipv6_enabled >= 0)
79 return link->sysctl_ipv6_enabled;
80
573e9a33
ZJS		 81 const char *ifname = link->ifname; /* work around bogus gcc warning */
82 r = sysctl_read_ip_property(AF_INET6, ifname, "disable_ipv6", &value);
bafa9641
YW		 83 if (r < 0)
84 return log_link_warning_errno(link, r,
85 "Failed to read net.ipv6.conf.%s.disable_ipv6 sysctl property: %m",
573e9a33 86 ifname);
bafa9641
YW		 87
88 link->sysctl_ipv6_enabled = value[0] == '0';
89 return link->sysctl_ipv6_enabled;
90}
91
b9d74c40
LP		 92static bool link_dhcp6_enabled(Link *link) {
93 assert(link);
94
fa709992
LP		 95 if (!socket_ipv6_is_supported())
96 return false;
97
78c958f8
TG		 98 if (link->flags & IFF_LOOPBACK)
99 return false;
100
101 if (!link->network)
102 return false;
103
f2bfcdb9
YW		 104 if (link->network->bond)
105 return false;
106
cab042b8 107 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 108 return false;
109
bafa9641 110 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 111 return false;
112
e0ee46f2 113 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 114}
115
b9d74c40
LP		 116static bool link_dhcp4_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
cab042b8 128 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 129 return false;
130
e0ee46f2 131 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 132}
133
b9d74c40
LP		 134static bool link_dhcp4_server_enabled(Link *link) {
135 assert(link);
136
78c958f8
TG		 137 if (link->flags & IFF_LOOPBACK)
138 return false;
139
140 if (!link->network)
141 return false;
142
f2bfcdb9
YW		 143 if (link->network->bond)
144 return false;
145
cab042b8 146 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 147 return false;
148
78c958f8
TG		 149 return link->network->dhcp_server;
150}
151
910feb78 152bool link_ipv4ll_enabled(Link *link, AddressFamilyBoolean mask) {
b9d74c40 153 assert(link);
910feb78 154 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 155
78c958f8
TG		 156 if (link->flags & IFF_LOOPBACK)
157 return false;
158
159 if (!link->network)
160 return false;
161
98d20a17 162 if (STRPTR_IN_SET(link->kind,
163 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
164 "vti6", "can", "vcan", "vxcan", "nlmon", "xfrm"))
a8f5bba6
JD		 165 return false;
166
f410d463
YW		 167 /* L3 or L3S mode do not support ARP. */
168 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
169 return false;
170
f2bfcdb9
YW		 171 if (link->network->bond)
172 return false;
173
910feb78 174 return link->network->link_local & mask;
8bc17bb3
SS		 175}
176
b9d74c40
LP		 177static bool link_ipv6ll_enabled(Link *link) {
178 assert(link);
179
fa709992
LP		 180 if (!socket_ipv6_is_supported())
181 return false;
182
d0d6a4cd
TG		 183 if (link->flags & IFF_LOOPBACK)
184 return false;
185
186 if (!link->network)
187 return false;
188
d61e4c5b 189 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 190 return false;
191
f2bfcdb9
YW		 192 if (link->network->bond)
193 return false;
194
bafa9641 195 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 196 return false;
197
e0ee46f2 198 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 199}
200
439689c6
SS		 201static bool link_ipv6_enabled(Link *link) {
202 assert(link);
203
204 if (!socket_ipv6_is_supported())
205 return false;
206
b102cdca 207 if (link->network->bond)
2b00a4e0
TY		 208 return false;
209
bafa9641 210 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 211 return false;
212
cab042b8 213 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 214 return false;
215
4cef7fe3
TY		 216 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
217 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 218}
219
7465dd22
PF		 220static bool link_radv_enabled(Link *link) {
221 assert(link);
222
223 if (!link_ipv6ll_enabled(link))
224 return false;
225
55a7c78b 226 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 227}
228
769d324c 229static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 230 assert(link);
231
5a8bcb67
LP		 232 if (link->flags & IFF_LOOPBACK)
233 return false;
234
235 if (!link->network)
236 return false;
237
765afd5c
LP		 238 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
239 return false;
240
e0ee46f2 241 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 242}
243
244static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 245 assert(link);
765afd5c
LP		 246
247 if (!socket_ipv6_is_supported())
248 return false;
249
769d324c
LP		 250 if (link->flags & IFF_LOOPBACK)
251 return false;
252
253 if (!link->network)
254 return false;
255
765afd5c
LP		 256 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
257 return false;
258
bafa9641 259 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 260 return false;
261
e0ee46f2 262 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 263}
264
23d8b221
SS		 265static bool link_proxy_arp_enabled(Link *link) {
266 assert(link);
267
268 if (link->flags & IFF_LOOPBACK)
269 return false;
270
271 if (!link->network)
272 return false;
273
274 if (link->network->proxy_arp < 0)
275 return false;
276
277 return true;
278}
279
b9d74c40
LP		 280static bool link_ipv6_accept_ra_enabled(Link *link) {
281 assert(link);
282
fa709992
LP		 283 if (!socket_ipv6_is_supported())
284 return false;
285
f5a8c43f
TG		 286 if (link->flags & IFF_LOOPBACK)
287 return false;
288
289 if (!link->network)
290 return false;
291
702c979f
SS		 292 if (!link_ipv6ll_enabled(link))
293 return false;
294
f5a8c43f
TG		 295 /* If unset use system default (enabled if local forwarding is disabled.
296 * disabled if local forwarding is enabled).
297 * If set, ignore or enforce RA independent of local forwarding state.
298 */
299 if (link->network->ipv6_accept_ra < 0)
300 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
301 return !link_ipv6_forward_enabled(link);
302 else if (link->network->ipv6_accept_ra > 0)
303 /* accept RA even if ip_forward is enabled */
304 return true;
305 else
306 /* ignore RA */
307 return false;
308}
309
1f0d9695 310static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 311 assert(link);
d68e2e59
LP		 312
313 if (!socket_ipv6_is_supported())
314 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
315
49092e22 316 if (link->flags & IFF_LOOPBACK)
1f0d9695 317 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 318
319 if (!link->network)
1f0d9695 320 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 321
322 return link->network->ipv6_privacy_extensions;
323}
324
439689c6 325static int link_enable_ipv6(Link *link) {
439689c6
SS		 326 bool disabled;
327 int r;
328
329 if (link->flags & IFF_LOOPBACK)
330 return 0;
331
332 disabled = !link_ipv6_enabled(link);
333
62e021a9 334 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 335 if (r < 0)
c98b3545 336 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 337 else
b106c586 338 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 339
340 return 0;
341}
342
34bf3c00
YW		 343static bool link_is_enslaved(Link *link) {
344 if (link->flags & IFF_SLAVE)
345 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
346 return true;
347
34bf3c00
YW		 348 if (!link->network)
349 return false;
350
bb262ef0 351 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 352 return true;
353
bb262ef0
YW		 354 /* TODO: add conditions for other netdevs. */
355
34bf3c00
YW		 356 return false;
357}
358
45e11abf
YW		 359static void link_update_master_operstate(Link *link, NetDev *netdev) {
360 Link *master;
361
362 if (!netdev)
363 return;
364
365 if (link_get(link->manager, netdev->ifindex, &master) < 0)
366 return;
367
368 link_update_operstate(master, true);
369}
370
371void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 372 LinkOperationalState operstate;
1678fbb3
YW		 373 LinkCarrierState carrier_state;
374 LinkAddressState address_state;
35c5a9ca 375 _cleanup_strv_free_ char **p = NULL;
1678fbb3 376 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 377 bool changed = false;
1678fbb3 378 Address *address;
45e11abf 379 Iterator i;
14153d1b 380
84de38c5
TG		 381 assert(link);
382
383 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 384 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 385 else if (link_has_carrier(link)) {
1678fbb3
YW		 386 if (link_is_enslaved(link))
387 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 388 else
1678fbb3 389 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 390 } else if (link->flags & IFF_UP)
1678fbb3 391 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 392 else
1678fbb3 393 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 394
1678fbb3 395 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 396 Link *slave;
397
5f707e12 398 SET_FOREACH(slave, link->slaves, i) {
959f65d3 399 link_update_operstate(slave, false);
84de38c5 400
1678fbb3
YW		 401 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
402 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 403 }
959f65d3 404 }
84de38c5 405
1678fbb3
YW		 406 SET_FOREACH(address, link->addresses, i) {
407 if (!address_is_ready(address))
408 continue;
84de38c5 409
1678fbb3
YW		 410 if (address->scope < scope)
411 scope = address->scope;
412 }
84de38c5 413
1678fbb3
YW		 414 /* for operstate we also take foreign addresses into account */
415 SET_FOREACH(address, link->addresses_foreign, i) {
416 if (!address_is_ready(address))
417 continue;
418
419 if (address->scope < scope)
420 scope = address->scope;
421 }
422
423 if (scope < RT_SCOPE_SITE)
424 /* universally accessible addresses found */
425 address_state = LINK_ADDRESS_STATE_ROUTABLE;
426 else if (scope < RT_SCOPE_HOST)
427 /* only link or site local addresses found */
428 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 429 else
1678fbb3
YW		 430 /* no useful addresses found */
431 address_state = LINK_ADDRESS_STATE_OFF;
432
433 /* Mapping of address and carrier state vs operational state
434 * carrier state
435 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
436 * ------------------------------------------------------------------------------
437 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
438 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
439 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
440 */
84de38c5 441
1678fbb3
YW		 442 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
443 operstate = (LinkOperationalState) carrier_state;
444 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
445 operstate = LINK_OPERSTATE_ROUTABLE;
446 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
447 operstate = LINK_OPERSTATE_DEGRADED;
448 else
14153d1b
YW		 449 operstate = LINK_OPERSTATE_ENSLAVED;
450
35c5a9ca
YW		 451 if (link->carrier_state != carrier_state) {
452 link->carrier_state = carrier_state;
453 changed = true;
454 if (strv_extend(&p, "CarrierState") < 0)
455 log_oom();
456 }
959f65d3 457
35c5a9ca
YW		 458 if (link->address_state != address_state) {
459 link->address_state = address_state;
460 changed = true;
461 if (strv_extend(&p, "AddressState") < 0)
462 log_oom();
959f65d3
YW		 463 }
464
84de38c5
TG		 465 if (link->operstate != operstate) {
466 link->operstate = operstate;
35c5a9ca
YW		 467 changed = true;
468 if (strv_extend(&p, "OperationalState") < 0)
469 log_oom();
84de38c5 470 }
959f65d3 471
35c5a9ca
YW		 472 if (p)
473 link_send_changed_strv(link, p);
474 if (changed)
475 link_dirty(link);
476
45e11abf
YW		 477 if (also_update_master && link->network) {
478 link_update_master_operstate(link, link->network->bond);
479 link_update_master_operstate(link, link->network->bridge);
959f65d3 480 }
84de38c5
TG		 481}
482
51d18171
TG		 483#define FLAG_STRING(string, flag, old, new) \
484 (((old ^ new) & flag) \
485 ? ((old & flag) ? (" -" string) : (" +" string)) \
486 : "")
487
bb262ef0 488static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 489 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
490 uint8_t operstate;
491 int r;
492
493 assert(link);
494
495 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 496 if (r < 0)
497 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 498
1c4baffc 499 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 500 if (r < 0)
501 /* if we got a message without operstate, take it to mean
502 the state was unchanged */
503 operstate = link->kernel_operstate;
504
bb262ef0 505 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 506 return 0;
507
508 if (link->flags != flags) {
6a7a4e4d 509 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		 510 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
511 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
512 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
513 FLAG_STRING("UP", IFF_UP, link->flags, flags),
514 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
515 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
516 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
517 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
518 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
519 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
520 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
521 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
522 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
523 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
524 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
525 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
526 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
527 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
528 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
529
530 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
531 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
532 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
533 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
534 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
535 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
536 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
537 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
538
539 /* link flags are currently at most 18 bits, let's align to
540 * printing 20 */
541 if (unknown_flags_added)
79008bdd 542 log_link_debug(link,
6a7a4e4d 543 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 544 unknown_flags_added);
545
546 if (unknown_flags_removed)
79008bdd 547 log_link_debug(link,
6a7a4e4d 548 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 549 unknown_flags_removed);
550 }
551
552 link->flags = flags;
553 link->kernel_operstate = operstate;
554
959f65d3 555 link_update_operstate(link, true);
51d18171
TG		 556
557 return 0;
558}
559
1c4baffc 560static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 561 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 562 uint16_t type;
6cad256d 563 const char *ifname, *kind = NULL;
505f8da7 564 int r, ifindex;
b710e6b6 565 unsigned short iftype;
f579559b 566
0c2f9b84 567 assert(manager);
505f8da7 568 assert(message);
f579559b
TG		 569 assert(ret);
570
6cad256d
TJ		 571 /* check for link kind */
572 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
573 if (r == 0) {
db2f8a2e 574 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 575 r = sd_netlink_message_exit_container(message);
576 if (r < 0)
577 return r;
578 }
579
1c4baffc 580 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 581 if (r < 0)
582 return r;
583 else if (type != RTM_NEWLINK)
584 return -EINVAL;
585
586 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
587 if (r < 0)
588 return r;
589 else if (ifindex <= 0)
590 return -EINVAL;
591
b710e6b6
LP		 592 r = sd_rtnl_message_link_get_type(message, &iftype);
593 if (r < 0)
594 return r;
595
1c4baffc 596 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 597 if (r < 0)
598 return r;
599
17f9c355 600 link = new(Link, 1);
f579559b
TG		 601 if (!link)
602 return -ENOMEM;
603
17f9c355
YW		 604 *link = (Link) {
605 .n_ref = 1,
606 .manager = manager,
607 .state = LINK_STATE_PENDING,
608 .rtnl_extended_attrs = true,
609 .ifindex = ifindex,
610 .iftype = iftype,
bafa9641 611 .sysctl_ipv6_enabled = -1,
17f9c355
YW		 612 };
613
505f8da7
TG		 614 link->ifname = strdup(ifname);
615 if (!link->ifname)
616 return -ENOMEM;
f579559b 617
6cad256d
TJ		 618 if (kind) {
619 link->kind = strdup(kind);
620 if (!link->kind)
621 return -ENOMEM;
622 }
623
cbff7170
TJ		 624 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
625 if (r < 0)
626 log_link_debug_errno(link, r, "New device has no master, continuing without");
627
1c4baffc 628 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 629 if (r < 0)
34437b4f 630 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 631
34437b4f 632 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 633 return -ENOMEM;
fe8db0c5 634
34437b4f 635 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 636 return -ENOMEM;
637
34437b4f 638 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 639 return -ENOMEM;
640
d5099efc 641 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 642 if (r < 0)
643 return r;
644
645 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 646 if (r < 0)
647 return r;
648
bb262ef0 649 r = link_update_flags(link, message, false);
51d18171
TG		 650 if (r < 0)
651 return r;
652
1cc6c93a 653 *ret = TAKE_PTR(link);
f579559b
TG		 654
655 return 0;
656}
657
8301aa0b 658static Link *link_free(Link *link) {
428fd0a7
TG		 659 Address *address;
660
8301aa0b 661 assert(link);
f579559b 662
f535e354
YW		 663 link->routes = set_free_with_destructor(link->routes, route_free);
664 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 665
f535e354
YW		 666 link->addresses = set_free_with_destructor(link->addresses, address_free);
667 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 668
11bf3cce
LP		 669 while ((address = link->pool_addresses)) {
670 LIST_REMOVE(addresses, link->pool_addresses, address);
671 address_free(address);
672 }
673
bfcdba8d 674 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 675 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 676 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 677
7272b25e 678 link_lldp_emit_stop(link);
8e1ad1ea 679
68a8723c
TG		 680 free(link->lease_file);
681
4afd3348 682 sd_lldp_unref(link->lldp);
49699bac
SS		 683 free(link->lldp_file);
684
c69305ff
LP		 685 ndisc_flush(link);
686
56cd007a 687 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 688 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 689 sd_ndisc_unref(link->ndisc);
7465dd22 690 sd_radv_unref(link->radv);
1e7a0e21 691
c166a070 692 free(link->ifname);
ceac4078 693 free(link->kind);
6cad256d 694
db2f8a2e 695 (void) unlink(link->state_file);
fe8db0c5 696 free(link->state_file);
c166a070 697
51517f9e 698 sd_device_unref(link->sd_device);
b5db00e5 699
0d4ad91d 700 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 701 hashmap_free(link->bound_by_links);
702
5f707e12 703 set_free_with_destructor(link->slaves, link_unref);
033295c1 704
c9c908a6
YW		 705 network_unref(link->network);
706
8301aa0b 707 return mfree(link);
14b746f7
TG		 708}
709
8301aa0b 710DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 711
11a7f229
TG		 712int link_get(Manager *m, int ifindex, Link **ret) {
713 Link *link;
11a7f229
TG		 714
715 assert(m);
11a7f229
TG		 716 assert(ifindex);
717 assert(ret);
718
ae06ab10 719 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 720 if (!link)
721 return -ENODEV;
722
723 *ret = link;
724
725 return 0;
726}
727
af9ba57a 728void link_set_state(Link *link, LinkState state) {
e331e246
TG		 729 assert(link);
730
731 if (link->state == state)
732 return;
733
0beb9542
YW		 734 log_link_debug(link, "State changed: %s -> %s",
735 link_state_to_string(link->state),
736 link_state_to_string(state));
737
e331e246
TG		 738 link->state = state;
739
740 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 741}
742
57bd6899
TG		 743static void link_enter_unmanaged(Link *link) {
744 assert(link);
745
e331e246 746 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 747
84de38c5 748 link_dirty(link);
57bd6899
TG		 749}
750
95355a28 751int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 752 int r = 0, k;
753
754 assert(link);
755 assert(link->manager);
756 assert(link->manager->event);
757
d03073dd
YW		 758 dhcp4_release_old_lease(link);
759
95355a28
YW		 760 if (link->dhcp_client && (!may_keep_dhcp || !link->network ||
761 !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) {
111bb8f9 762 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 763 if (k < 0)
36c7d709 764 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 765 }
766
ba179154 767 if (link->ipv4ll) {
111bb8f9 768 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 769 if (k < 0)
36c7d709 770 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 771 }
772
f5a8c43f
TG		 773 if (link->dhcp6_client) {
774 k = sd_dhcp6_client_stop(link->dhcp6_client);
775 if (k < 0)
36c7d709 776 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 777 }
4138fb2c 778
1e7a0e21
LP		 779 if (link->ndisc) {
780 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 781 if (k < 0)
36c7d709 782 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 783 }
784
7465dd22
PF		 785 if (link->radv) {
786 k = sd_radv_stop(link->radv);
787 if (k < 0)
788 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
789 }
790
7272b25e 791 link_lldp_emit_stop(link);
111bb8f9
TG		 792 return r;
793}
794
b22d8a00 795void link_enter_failed(Link *link) {
ef1ba606 796 assert(link);
f882c247 797
370e9930 798 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 799 return;
800
6a7a4e4d 801 log_link_warning(link, "Failed");
449f7554 802
e331e246 803 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 804
95355a28 805 link_stop_clients(link, false);
111bb8f9 806
84de38c5 807 link_dirty(link);
f882c247
TG		 808}
809
7033af49
YW		 810static int link_join_netdevs_after_configured(Link *link) {
811 NetDev *netdev;
812 Iterator i;
813 int r;
814
815 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
816 if (netdev->ifindex > 0)
817 /* Assume already enslaved. */
818 continue;
819
820 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
821 continue;
822
823 log_struct(LOG_DEBUG,
824 LOG_LINK_INTERFACE(link),
825 LOG_NETDEV_INTERFACE(netdev),
826 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
827
828 r = netdev_join(netdev, link, NULL);
829 if (r < 0)
830 return log_struct_errno(LOG_WARNING, r,
831 LOG_LINK_INTERFACE(link),
832 LOG_NETDEV_INTERFACE(netdev),
833 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
834 }
835
836 return 0;
837}
838
e3a7b048 839static void link_enter_configured(Link *link) {
dd43110f
TG		 840 assert(link);
841 assert(link->network);
e3a7b048 842
289e6774 843 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 844 return;
dd43110f 845
6a7a4e4d 846 log_link_info(link, "Configured");
dd43110f 847
e331e246 848 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 849
7033af49
YW		 850 (void) link_join_netdevs_after_configured(link);
851
84de38c5 852 link_dirty(link);
dd43110f
TG		 853}
854
47079967 855static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 856 RoutingPolicyRule *rule, *rrule = NULL;
857 int r;
858
859 assert(link);
860 assert(link->network);
861
2428613f
YW		 862 link->routing_policy_rules_configured = false;
863
8a9b3a23 864 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 865 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 866 if (r >= 0) {
867 if (r == 0)
868 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 869 continue;
870 }
871
9f08a578 872 r = routing_policy_rule_configure(rule, link, NULL);
8a9b3a23
SS		 873 if (r < 0) {
874 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
875 link_enter_failed(link);
876 return r;
877 }
7ef7e550
YW		 878 if (r > 0)
879 link->routing_policy_rule_messages++;
8a9b3a23
SS		 880 }
881
882 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 883 if (link->routing_policy_rule_messages == 0) {
884 link->routing_policy_rules_configured = true;
885 link_check_ready(link);
b425c3ae 886 } else {
7715629e 887 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 888 link_set_state(link, LINK_STATE_CONFIGURING);
889 }
8a9b3a23
SS		 890
891 return 0;
892}
893
302a796f 894static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 895 int r;
896
1046bf9b 897 assert(link);
7715629e 898 assert(link->route_messages > 0);
289e6774
WKI		 899 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
900 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 901
7715629e 902 link->route_messages--;
f882c247 903
77a008c0 904 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 905 return 1;
906
1c4baffc 907 r = sd_netlink_message_get_errno(m);
c166a070 908 if (r < 0 && r != -EEXIST)
a2fae7bb 909 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 910
7715629e 911 if (link->route_messages == 0) {
6a7a4e4d 912 log_link_debug(link, "Routes set");
7715629e 913 link->static_routes_configured = true;
8012cd39 914 link_check_ready(link);
dd3efc09 915 }
f882c247
TG		 916
917 return 1;
918}
919
b5799eeb 920int link_request_set_routes(Link *link) {
bf61b05a
LP		 921 enum {
922 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
923 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
924 _PHASE_MAX
925 } phase;
a6cc569e 926 Route *rt;
f882c247
TG		 927 int r;
928
929 assert(link);
930 assert(link->network);
c42ff3a1
WKI		 931 assert(link->addresses_configured);
932 assert(link->address_messages == 0);
289e6774 933 assert(link->state != _LINK_STATE_INVALID);
f882c247 934
2428613f 935 link->static_routes_configured = false;
27c34f73 936
47079967 937 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 938 if (r < 0)
939 return r;
f882c247 940
bf61b05a
LP		 941 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
942 for (phase = 0; phase < _PHASE_MAX; phase++)
943 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 944
bf61b05a
LP		 945 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
946 continue;
a6cc569e 947
0d34228f
SS		 948 r = route_configure(rt, link, route_handler);
949 if (r < 0) {
950 log_link_warning_errno(link, r, "Could not set routes: %m");
951 link_enter_failed(link);
952 return r;
953 }
c4423317
YW		 954 if (r > 0)
955 link->route_messages++;
0d34228f 956 }
f5be5601 957
7715629e
ST		 958 if (link->route_messages == 0) {
959 link->static_routes_configured = true;
8012cd39 960 link_check_ready(link);
b425c3ae 961 } else {
6a7a4e4d 962 log_link_debug(link, "Setting routes");
b425c3ae
YW		 963 link_set_state(link, LINK_STATE_CONFIGURING);
964 }
f882c247
TG		 965
966 return 0;
967}
968
6accfd31
DA		 969void link_check_ready(Link *link) {
970 Address *a;
971 Iterator i;
972
973 assert(link);
974
975 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
976 return;
977
978 if (!link->network)
979 return;
980
981 if (!link->addresses_configured)
982 return;
983
984 if (!link->neighbors_configured)
985 return;
986
6aa5773b
DA		 987 SET_FOREACH(a, link->addresses, i)
988 if (!address_is_ready(a))
989 return;
990
991 if (!link->addresses_ready) {
992 link->addresses_ready = true;
993 link_request_set_routes(link);
710ce9e5 994 return;
6aa5773b
DA		 995 }
996
6accfd31
DA		 997 if (!link->static_routes_configured)
998 return;
999
1000 if (!link->routing_policy_rules_configured)
1001 return;
1002
463797c1 1003 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1004
463797c1
YW		 1005 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
1006 return;
6accfd31 1007
463797c1
YW		 1008 if (link_ipv6ll_enabled(link) &&
1009 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1010 return;
6accfd31 1011
463797c1
YW		 1012 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1013 !link->dhcp4_configured &&
1014 !link->dhcp6_configured &&
1015 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
1016 /* When DHCP is enabled, at least one protocol must provide an address, or
1017 * an IPv4ll fallback address must be configured. */
1018 return;
1019
1020 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1021 return;
1022 }
6accfd31 1023
6accfd31
DA		 1024 if (link->state != LINK_STATE_CONFIGURED)
1025 link_enter_configured(link);
1026
1027 return;
1028}
1029
e4a71bf3
WKI		 1030static int link_request_set_neighbors(Link *link) {
1031 Neighbor *neighbor;
1032 int r;
1033
1034 assert(link);
1035 assert(link->network);
1036 assert(link->state != _LINK_STATE_INVALID);
1037
2428613f 1038 link->neighbors_configured = false;
e4a71bf3
WKI		 1039
1040 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1041 r = neighbor_configure(neighbor, link, NULL);
1042 if (r < 0) {
1043 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1044 link_enter_failed(link);
1045 return r;
1046 }
1047 }
1048
1049 if (link->neighbor_messages == 0) {
1050 link->neighbors_configured = true;
1051 link_check_ready(link);
b425c3ae 1052 } else {
e4a71bf3 1053 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1054 link_set_state(link, LINK_STATE_CONFIGURING);
1055 }
e4a71bf3
WKI		 1056
1057 return 0;
1058}
1059
302a796f 1060static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1061 int r;
1062
4958aee4 1063 assert(rtnl);
f5be5601
TG		 1064 assert(m);
1065 assert(link);
1066 assert(link->ifname);
7715629e 1067 assert(link->address_messages > 0);
289e6774 1068 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1069 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1070
7715629e 1071 link->address_messages--;
f882c247 1072
5da8149f 1073 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1074 return 1;
1075
1c4baffc 1076 r = sd_netlink_message_get_errno(m);
c166a070 1077 if (r < 0 && r != -EEXIST)
a2fae7bb 1078 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1079 else if (r >= 0)
200a0868 1080 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1081
7715629e 1082 if (link->address_messages == 0) {
6a7a4e4d 1083 log_link_debug(link, "Addresses set");
c42ff3a1 1084 link->addresses_configured = true;
6aa5773b 1085 link_check_ready(link);
dd3efc09 1086 }
f882c247
TG		 1087
1088 return 1;
1089}
1090
f6bb7ac5
TJ		 1091static int link_set_bridge_fdb(Link *link) {
1092 FdbEntry *fdb_entry;
197e2809 1093 int r;
f6bb7ac5
TJ		 1094
1095 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1096 r = fdb_entry_configure(link, fdb_entry);
197e2809 1097 if (r < 0)
f6bb7ac5 1098 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1099 }
1100
197e2809 1101 return 0;
f6bb7ac5
TJ		 1102}
1103
289e6774 1104static int link_request_set_addresses(Link *link) {
95b74ef6 1105 AddressLabel *label;
a6cc569e 1106 Address *ad;
f882c247
TG		 1107 int r;
1108
1109 assert(link);
1110 assert(link->network);
f5be5601 1111 assert(link->state != _LINK_STATE_INVALID);
f882c247 1112
2428613f
YW		 1113 /* Reset all *_configured flags we are configuring. */
1114 link->addresses_configured = false;
6aa5773b 1115 link->addresses_ready = false;
2428613f
YW		 1116 link->neighbors_configured = false;
1117 link->static_routes_configured = false;
1118 link->routing_policy_rules_configured = false;
1119
f6bb7ac5
TJ		 1120 r = link_set_bridge_fdb(link);
1121 if (r < 0)
1122 return r;
1123
f3ef324d
YW		 1124 r = link_request_set_neighbors(link);
1125 if (r < 0)
1126 return r;
e4a71bf3 1127
3d3d4255 1128 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1129 bool update;
1130
1131 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1132
1133 r = address_configure(ad, link, address_handler, update);
dd3efc09 1134 if (r < 0) {
5a8bcb67 1135 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1136 link_enter_failed(link);
95b74ef6
SS		 1137 return r;
1138 }
54a1a535
YW		 1139 if (r > 0)
1140 link->address_messages++;
95b74ef6
SS		 1141 }
1142
1143 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1144 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1145 if (r < 0) {
1146 log_link_warning_errno(link, r, "Could not set address label: %m");
1147 link_enter_failed(link);
f5be5601
TG		 1148 return r;
1149 }
1150
7715629e 1151 link->address_label_messages++;
f882c247
TG		 1152 }
1153
d4cdbea5
TG		 1154 /* now that we can figure out a default address for the dhcp server,
1155 start it */
708c425d 1156 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61
YW		 1157 r = dhcp4_server_configure(link);
1158 if (r < 0) {
d4cdbea5 1159 link_enter_failed(link);
d4cdbea5 1160 return r;
586ac6f7 1161 }
6a7a4e4d 1162 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1163 }
1164
c42ff3a1
WKI		 1165 if (link->address_messages == 0) {
1166 link->addresses_configured = true;
6aa5773b 1167 link_check_ready(link);
b425c3ae 1168 } else {
6a7a4e4d 1169 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1170 link_set_state(link, LINK_STATE_CONFIGURING);
1171 }
431ca2ce 1172
f882c247
TG		 1173 return 0;
1174}
1175
13b498f9 1176static int link_set_bridge_vlan(Link *link) {
86e2be7b 1177 int r;
13b498f9
TJ		 1178
1179 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1180 if (r < 0)
1181 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1182
1183 return r;
1184}
1185
a60a720c 1186static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1187 int r;
1188
1189 if (!link_proxy_arp_enabled(link))
1190 return 0;
1191
62e021a9 1192 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1193 if (r < 0)
1194 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1195
1196 return 0;
1197}
1198
55dc8c4a
YW		 1199static int link_configure_after_setting_mtu(Link *link);
1200
302a796f 1201static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1202 int r;
1203
1204 assert(m);
1205 assert(link);
1206 assert(link->ifname);
1207
55dc8c4a
YW		 1208 link->setting_mtu = false;
1209
5da8149f 1210 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1211 return 1;
1212
1c4baffc 1213 r = sd_netlink_message_get_errno(m);
55dc8c4a 1214 if (r < 0) {
a2fae7bb 1215 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1216 return 1;
1217 }
1218
1219 log_link_debug(link, "Setting MTU done.");
1220
bd08ce56 1221 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1222 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1223
1224 return 1;
1225}
1226
933c70a0 1227int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1228 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1229 int r;
1230
1231 assert(link);
1232 assert(link->manager);
1233 assert(link->manager->rtnl);
1234
40288ece
YW		 1235 if (mtu == 0 || link->setting_mtu)
1236 return 0;
1237
933c70a0 1238 if (link->mtu == mtu)
ee493106
YW		 1239 return 0;
1240
6a7a4e4d 1241 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1242
6a7a4e4d
LP		 1243 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1244 if (r < 0)
1245 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1246
44b598a1 1247 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1248 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1249 (void) link_enable_ipv6(link);
1250
1251 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1252 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1253 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1254
1255 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1256 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1257
72c2500b 1258 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1259 }
1260
1c4baffc 1261 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1262 if (r < 0)
1263 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1264
302a796f
YW		 1265 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1266 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1267 if (r < 0)
1268 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1269
ae941762 1270 link_ref(link);
1046bf9b 1271 link->setting_mtu = true;
b226d99b 1272
4f882b2a
TG		 1273 return 0;
1274}
1275
f6fcc1c2
YW		 1276static bool link_reduces_vlan_mtu(Link *link) {
1277 /* See netif_reduces_vlan_mtu() in kernel. */
1278 return streq_ptr(link->kind, "macsec");
1279}
1280
1281static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1282 uint32_t mtu = 0;
1283 NetDev *dev;
1284 Iterator i;
1285
1286 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1287 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1288 /* See vlan_dev_change_mtu() in kernel. */
1289 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1290
1291 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1292 /* See macvlan_change_mtu() in kernel. */
1293 mtu = dev->mtu;
1294
1295 return mtu;
1296}
1297
1298static int link_configure_mtu(Link *link) {
1299 uint32_t mtu;
1300
1301 assert(link);
1302 assert(link->network);
1303
1304 if (link->network->mtu > 0)
1305 return link_set_mtu(link, link->network->mtu);
1306
1307 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1308 if (link->mtu >= mtu)
1309 return 0;
1310
1311 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1312 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1313 link->mtu, mtu);
1314
1315 return link_set_mtu(link, mtu);
1316}
1317
302a796f 1318static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1319 int r;
1320
1321 assert(m);
1322 assert(link);
1323 assert(link->ifname);
1324
1325 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1326 return 1;
1327
1328 r = sd_netlink_message_get_errno(m);
1329 if (r < 0)
1330 log_link_warning_errno(link, r, "Could not set link flags: %m");
1331
1332 return 1;
1333}
1334
1335static int link_set_flags(Link *link) {
1336 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1337 unsigned ifi_change = 0;
1338 unsigned ifi_flags = 0;
1339 int r;
1340
1341 assert(link);
1342 assert(link->manager);
1343 assert(link->manager->rtnl);
1344
1345 if (link->flags & IFF_LOOPBACK)
1346 return 0;
1347
1348 if (!link->network)
1349 return 0;
1350
866e6b7a 1351 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1352 return 0;
1353
1354 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1355 if (r < 0)
1356 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1357
1358 if (link->network->arp >= 0) {
1359 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1360 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1361 }
1362
1363 if (link->network->multicast >= 0) {
1364 ifi_change |= IFF_MULTICAST;
1365 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1366 }
1367
866e6b7a
SS		 1368 if (link->network->allmulticast >= 0) {
1369 ifi_change |= IFF_ALLMULTI;
1370 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1371 }
1372
99d2baa2
SS		 1373 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1374 if (r < 0)
1375 return log_link_error_errno(link, r, "Could not set link flags: %m");
1376
302a796f
YW		 1377 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1378 link_netlink_destroy_callback, link);
99d2baa2
SS		 1379 if (r < 0)
1380 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1381
1382 link_ref(link);
1383
1384 return 0;
1385}
1386
e7ab854c
TG		 1387static int link_acquire_ipv6_conf(Link *link) {
1388 int r;
1389
1390 assert(link);
1391
e7ab854c 1392 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1393 assert(link->ndisc);
e7ab854c
TG		 1394
1395 log_link_debug(link, "Discovering IPv6 routers");
1396
1e7a0e21 1397 r = sd_ndisc_start(link->ndisc);
63348d13 1398 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1399 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1400 }
1401
7465dd22
PF		 1402 if (link_radv_enabled(link)) {
1403 assert(link->radv);
1404 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1405
1406 log_link_debug(link, "Starting IPv6 Router Advertisements");
1407
1408 r = sd_radv_start(link->radv);
1409 if (r < 0 && r != -EBUSY)
1410 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1411 }
1412
10752343
PF		 1413 (void) dhcp6_request_prefix_delegation(link);
1414
e7ab854c
TG		 1415 return 0;
1416}
1417
6fc25497 1418static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1419 int r;
1420
1421 assert(link);
ff254138
TG		 1422 assert(link->manager);
1423 assert(link->manager->event);
1424
910feb78 1425 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1426 assert(link->ipv4ll);
ff254138 1427
6a7a4e4d 1428 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1429
1430 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1431 if (r < 0)
1432 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1433 }
1434
78c958f8 1435 if (link_dhcp4_enabled(link)) {
eb34d4af 1436 assert(link->dhcp_client);
ff254138 1437
6a7a4e4d 1438 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1439
5c1d3fc9 1440 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1441 if (r < 0)
1442 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1443 }
ff254138 1444
6fc25497
SS		 1445 return 0;
1446}
1447
1448static int link_acquire_conf(Link *link) {
1449 int r;
1450
1451 assert(link);
1452
1453 r = link_acquire_ipv4_conf(link);
1454 if (r < 0)
1455 return r;
1456
3f7cc080 1457 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1458 r = link_acquire_ipv6_conf(link);
1459 if (r < 0)
1460 return r;
1461 }
1462
7272b25e
LP		 1463 if (link_lldp_emit_enabled(link)) {
1464 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1465 if (r < 0)
1466 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1467 }
1468
ff254138
TG		 1469 return 0;
1470}
1471
a61bb41c 1472bool link_has_carrier(Link *link) {
deb2e523
TG		 1473 /* see Documentation/networking/operstates.txt in the kernel sources */
1474
a61bb41c 1475 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1476 return true;
1477
a61bb41c 1478 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1479 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1480 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1481 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1482 return true;
1483
1484 return false;
1485}
1486
0e2fdb83
SS		 1487static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1488 int r;
1489
1490 assert(link);
1491
1492 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1493 return 1;
1494
1495 r = sd_netlink_message_get_errno(m);
1496 if (r < 0)
1497 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1498
1499 return 1;
1500}
1501
1502static int link_configure_addrgen_mode(Link *link) {
1503 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1504 uint8_t ipv6ll_mode;
1505 int r;
1506
1507 assert(link);
1508 assert(link->network);
1509 assert(link->manager);
1510 assert(link->manager->rtnl);
1511
9f6e82e6
YW		 1512 if (!socket_ipv6_is_supported())
1513 return 0;
1514
0e2fdb83
SS		 1515 log_link_debug(link, "Setting address genmode for link");
1516
1517 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1518 if (r < 0)
1519 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1520
1521 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1522 if (r < 0)
1523 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1524
1525 r = sd_netlink_message_open_container(req, AF_INET6);
1526 if (r < 0)
1527 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1528
1529 if (!link_ipv6ll_enabled(link))
1530 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1531 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1532 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1533 * reading the file fails with EIO. */
1534 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1535 else
1536 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1537
1538 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1539 if (r < 0)
1540 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1541
1542 r = sd_netlink_message_close_container(req);
1543 if (r < 0)
1544 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1545
1546 r = sd_netlink_message_close_container(req);
1547 if (r < 0)
1548 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1549
1550 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1551 link_netlink_destroy_callback, link);
1552 if (r < 0)
1553 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1554
1555 link_ref(link);
1556
1557 return 0;
1558}
1559
302a796f 1560static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1561 int r;
1562
1746cf2a
TG		 1563 assert(link);
1564
5da8149f 1565 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1566 return 1;
1567
1c4baffc 1568 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1569 if (r < 0)
26d6b214 1570 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1571 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1572
f882c247
TG		 1573 return 1;
1574}
1575
1cc84f3b 1576static int link_up(Link *link) {
4afd3348 1577 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1578 int r;
1579
f882c247 1580 assert(link);
c106cc36 1581 assert(link->network);
f882c247
TG		 1582 assert(link->manager);
1583 assert(link->manager->rtnl);
1584
6a7a4e4d 1585 log_link_debug(link, "Bringing link up");
449f7554 1586
6a7a4e4d
LP		 1587 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1588 if (r < 0)
1589 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1590
2b2d8603 1591 /* set it free if not enslaved with networkd */
6cb955c6 1592 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1593 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1594 if (r < 0)
1595 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1596 }
1597
5d4795f3 1598 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1599 if (r < 0)
1600 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1601
c106cc36 1602 if (link->network->mac) {
1c4baffc 1603 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1604 if (r < 0)
1605 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1606 }
1607
302a796f
YW		 1608 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1609 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1610 if (r < 0)
1611 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1612
b226d99b
TG		 1613 link_ref(link);
1614
f882c247
TG		 1615 return 0;
1616}
1617
302a796f 1618static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1619 int r;
1620
1621 assert(link);
1622
1623 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1624 return 1;
1625
1c4baffc 1626 r = sd_netlink_message_get_errno(m);
0d4ad91d 1627 if (r < 0)
a2fae7bb 1628 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1629
1630 return 1;
1631}
1632
8e54db83 1633int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1634 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1635 int r;
1636
1637 assert(link);
1638 assert(link->manager);
1639 assert(link->manager->rtnl);
1640
6a7a4e4d 1641 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1642
1643 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1644 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1645 if (r < 0)
1646 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1647
1648 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1649 if (r < 0)
1650 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1651
8e54db83
YW		 1652 r = netlink_call_async(link->manager->rtnl, NULL, req,
1653 callback ?: link_down_handler,
302a796f 1654 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1655 if (r < 0)
1656 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1657
1658 link_ref(link);
1659
1660 return 0;
1661}
1662
1663static int link_handle_bound_to_list(Link *link) {
1664 Link *l;
1665 Iterator i;
1666 int r;
1667 bool required_up = false;
1668 bool link_is_up = false;
1669
1670 assert(link);
1671
1672 if (hashmap_isempty(link->bound_to_links))
1673 return 0;
1674
1675 if (link->flags & IFF_UP)
1676 link_is_up = true;
1677
1678 HASHMAP_FOREACH (l, link->bound_to_links, i)
1679 if (link_has_carrier(l)) {
1680 required_up = true;
1681 break;
1682 }
1683
1684 if (!required_up && link_is_up) {
8e54db83 1685 r = link_down(link, NULL);
0d4ad91d
AR		 1686 if (r < 0)
1687 return r;
1688 } else if (required_up && !link_is_up) {
1689 r = link_up(link);
1690 if (r < 0)
1691 return r;
1692 }
1693
1694 return 0;
1695}
1696
1697static int link_handle_bound_by_list(Link *link) {
1698 Iterator i;
1699 Link *l;
1700 int r;
1701
1702 assert(link);
1703
1704 if (hashmap_isempty(link->bound_by_links))
1705 return 0;
1706
1707 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1708 r = link_handle_bound_to_list(l);
1709 if (r < 0)
1710 return r;
1711 }
1712
1713 return 0;
1714}
1715
1716static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1717 int r;
1718
1719 assert(link);
1720 assert(carrier);
1721
1722 if (link == carrier)
1723 return 0;
1724
1725 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1726 return 0;
1727
1728 r = hashmap_ensure_allocated(h, NULL);
1729 if (r < 0)
1730 return r;
1731
1732 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1733 if (r < 0)
1734 return r;
1735
1736 return 0;
1737}
1738
1739static int link_new_bound_by_list(Link *link) {
1740 Manager *m;
1741 Link *carrier;
1742 Iterator i;
1743 int r;
1744 bool list_updated = false;
1745
1746 assert(link);
1747 assert(link->manager);
1748
1749 m = link->manager;
1750
b295beea 1751 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1752 if (!carrier->network)
1753 continue;
1754
1755 if (strv_isempty(carrier->network->bind_carrier))
1756 continue;
1757
1758 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1759 r = link_put_carrier(link, carrier, &link->bound_by_links);
1760 if (r < 0)
1761 return r;
1762
1763 list_updated = true;
1764 }
1765 }
1766
1767 if (list_updated)
84de38c5 1768 link_dirty(link);
0d4ad91d 1769
b295beea 1770 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1771 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1772 if (r < 0)
1773 return r;
1774
84de38c5 1775 link_dirty(carrier);
0d4ad91d
AR		 1776 }
1777
1778 return 0;
1779}
1780
1781static int link_new_bound_to_list(Link *link) {
1782 Manager *m;
1783 Link *carrier;
1784 Iterator i;
1785 int r;
1786 bool list_updated = false;
1787
1788 assert(link);
1789 assert(link->manager);
1790
1791 if (!link->network)
1792 return 0;
1793
1794 if (strv_isempty(link->network->bind_carrier))
1795 return 0;
1796
1797 m = link->manager;
1798
1799 HASHMAP_FOREACH (carrier, m->links, i) {
1800 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1801 r = link_put_carrier(link, carrier, &link->bound_to_links);
1802 if (r < 0)
1803 return r;
1804
1805 list_updated = true;
1806 }
1807 }
1808
1809 if (list_updated)
84de38c5 1810 link_dirty(link);
0d4ad91d
AR		 1811
1812 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1813 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1814 if (r < 0)
1815 return r;
1816
84de38c5 1817 link_dirty(carrier);
0d4ad91d
AR		 1818 }
1819
1820 return 0;
1821}
1822
1823static int link_new_carrier_maps(Link *link) {
1824 int r;
1825
1826 r = link_new_bound_by_list(link);
1827 if (r < 0)
1828 return r;
1829
1830 r = link_handle_bound_by_list(link);
1831 if (r < 0)
1832 return r;
1833
1834 r = link_new_bound_to_list(link);
1835 if (r < 0)
1836 return r;
1837
1838 r = link_handle_bound_to_list(link);
1839 if (r < 0)
1840 return r;
1841
1842 return 0;
1843}
1844
1845static void link_free_bound_to_list(Link *link) {
1846 Link *bound_to;
1847 Iterator i;
1848
1849 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1850 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1851
1852 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1853 link_dirty(bound_to);
0d4ad91d
AR		 1854 }
1855
1856 return;
1857}
1858
1859static void link_free_bound_by_list(Link *link) {
1860 Link *bound_by;
1861 Iterator i;
1862
1863 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1864 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1865
1866 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1867 link_dirty(bound_by);
0d4ad91d
AR		 1868 link_handle_bound_to_list(bound_by);
1869 }
1870 }
1871
1872 return;
1873}
1874
1875static void link_free_carrier_maps(Link *link) {
1876 bool list_updated = false;
1877
1878 assert(link);
1879
1880 if (!hashmap_isempty(link->bound_to_links)) {
1881 link_free_bound_to_list(link);
1882 list_updated = true;
1883 }
1884
1885 if (!hashmap_isempty(link->bound_by_links)) {
1886 link_free_bound_by_list(link);
1887 list_updated = true;
1888 }
1889
1890 if (list_updated)
84de38c5 1891 link_dirty(link);
0d4ad91d
AR		 1892
1893 return;
1894}
1895
5f707e12
YW		 1896static int link_append_to_master(Link *link, NetDev *netdev) {
1897 Link *master;
1898 int r;
1899
1900 assert(link);
1901 assert(netdev);
1902
1903 r = link_get(link->manager, netdev->ifindex, &master);
1904 if (r < 0)
1905 return r;
1906
1907 r = set_ensure_allocated(&master->slaves, NULL);
1908 if (r < 0)
1909 return r;
1910
1911 r = set_put(master->slaves, link);
1912 if (r < 0)
1913 return r;
1914
1915 link_ref(link);
1916 return 0;
1917}
1918
1919static void link_drop_from_master(Link *link, NetDev *netdev) {
1920 Link *master;
1921
1922 assert(link);
1923
1924 if (!link->manager || !netdev)
1925 return;
1926
1927 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1928 return;
1929
1930 link_unref(set_remove(master->slaves, link));
1931}
1932
1933static void link_detach_from_manager(Link *link) {
1934 if (!link || !link->manager)
1935 return;
1936
1937 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1938 link_clean(link);
1939
1940 /* The following must be called at last. */
1941 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1942 link_unref(link);
1943}
1944
0d4ad91d
AR		 1945void link_drop(Link *link) {
1946 if (!link || link->state == LINK_STATE_LINGER)
1947 return;
1948
1949 link_set_state(link, LINK_STATE_LINGER);
1950
1951 link_free_carrier_maps(link);
1952
5f707e12
YW		 1953 if (link->network) {
1954 link_drop_from_master(link, link->network->bridge);
1955 link_drop_from_master(link, link->network->bond);
1956 }
1957
6a7a4e4d 1958 log_link_debug(link, "Link removed");
0d4ad91d 1959
db2f8a2e 1960 (void) unlink(link->state_file);
c4397d94 1961 link_detach_from_manager(link);
0d4ad91d
AR		 1962}
1963
3f265037 1964static int link_joined(Link *link) {
f882c247
TG		 1965 int r;
1966
ef1ba606 1967 assert(link);
f5be5601 1968 assert(link->network);
dd3efc09 1969
0d4ad91d
AR		 1970 if (!hashmap_isempty(link->bound_to_links)) {
1971 r = link_handle_bound_to_list(link);
1972 if (r < 0)
1973 return r;
1974 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1975 r = link_up(link);
1976 if (r < 0) {
1977 link_enter_failed(link);
1978 return r;
1979 }
ef1ba606 1980 }
f882c247 1981
9ed794a3 1982 if (link->network->bridge) {
e1853b00 1983 r = link_set_bridge(link);
6a7a4e4d
LP		 1984 if (r < 0)
1985 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1986
1987 r = link_append_to_master(link, link->network->bridge);
1988 if (r < 0)
1989 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1990 }
1991
eb64b435 1992 if (link->network->bond) {
7fcee284 1993 r = link_set_bond(link);
eb64b435
SS		 1994 if (r < 0)
1995 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1996
45e11abf 1997 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1998 if (r < 0)
1999 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2000 }
2001
ffff9abe
TJ		 2002 if (link->network->use_br_vlan &&
2003 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2004 r = link_set_bridge_vlan(link);
2005 if (r < 0)
2006 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2007 }
2008
c1835a42
RM		 2009 /* Skip setting up addresses until it gets carrier,
2010 or it would try to set addresses twice,
2011 which is bad for non-idempotent steps. */
dad2d78e 2012 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2013 return 0;
2014
b425c3ae 2015 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2016 return link_request_set_addresses(link);
02b59d57
TG		 2017}
2018
302a796f 2019static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2020 int r;
2021
1746cf2a 2022 assert(link);
ef1ba606 2023 assert(link->network);
34bf3c00 2024 assert(link->enslaving > 0);
02b59d57 2025
313cefa1 2026 link->enslaving--;
52433f6b 2027
5da8149f 2028 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2029 return 1;
2030
1c4baffc 2031 r = sd_netlink_message_get_errno(m);
856f962c 2032 if (r < 0 && r != -EEXIST) {
a2fae7bb 2033 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2034 link_enter_failed(link);
2035 return 1;
ba179154 2036 } else
6a7a4e4d 2037 log_link_debug(link, "Joined netdev");
02b59d57 2038
34bf3c00 2039 if (link->enslaving == 0) {
3f265037 2040 link_joined(link);
34bf3c00 2041 }
02b59d57
TG		 2042
2043 return 1;
2044}
2045
3f265037 2046static int link_enter_join_netdev(Link *link) {
6a0a2f86 2047 NetDev *netdev;
672682a6 2048 Iterator i;
02b59d57
TG		 2049 int r;
2050
2051 assert(link);
2052 assert(link->network);
bd08ce56 2053 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2054
289e6774 2055 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2056
84de38c5 2057 link_dirty(link);
34bf3c00 2058 link->enslaving = 0;
02b59d57 2059
d9c67ea1 2060 if (link->network->bond) {
cbff7170
TJ		 2061 if (link->network->bond->state == NETDEV_STATE_READY &&
2062 link->network->bond->ifindex == link->master_ifindex)
2063 return link_joined(link);
2064
f2341e0a
LP		 2065 log_struct(LOG_DEBUG,
2066 LOG_LINK_INTERFACE(link),
2067 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2068 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2069
34bf3c00
YW		 2070 link->enslaving++;
2071
f2341e0a 2072 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2073 if (r < 0) {
f2341e0a
LP		 2074 log_struct_errno(LOG_WARNING, r,
2075 LOG_LINK_INTERFACE(link),
2076 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2077 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2078 link_enter_failed(link);
2079 return r;
2080 }
0ad6148e
MO		 2081 }
2082
d9c67ea1 2083 if (link->network->bridge) {
f2341e0a
LP		 2084 log_struct(LOG_DEBUG,
2085 LOG_LINK_INTERFACE(link),
2086 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2087 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2088
34bf3c00
YW		 2089 link->enslaving++;
2090
f2341e0a 2091 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2092 if (r < 0) {
f2341e0a
LP		 2093 log_struct_errno(LOG_WARNING, r,
2094 LOG_LINK_INTERFACE(link),
2095 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2096 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2097 link_enter_failed(link);
2098 return r;
2099 }
52433f6b
TG		 2100 }
2101
6cb955c6
AR		 2102 if (link->network->vrf) {
2103 log_struct(LOG_DEBUG,
2104 LOG_LINK_INTERFACE(link),
2105 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2106 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2107
34bf3c00
YW		 2108 link->enslaving++;
2109
6cb955c6
AR		 2110 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2111 if (r < 0) {
2112 log_struct_errno(LOG_WARNING, r,
2113 LOG_LINK_INTERFACE(link),
2114 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2115 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2116 link_enter_failed(link);
2117 return r;
2118 }
6cb955c6
AR		 2119 }
2120
6a0a2f86 2121 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2122
2b6db913
YW		 2123 if (netdev->ifindex > 0)
2124 /* Assume already enslaved. */
a63e5daa 2125 continue;
a63e5daa 2126
7033af49
YW		 2127 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2128 continue;
2129
f2341e0a
LP		 2130 log_struct(LOG_DEBUG,
2131 LOG_LINK_INTERFACE(link),
2132 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2133 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2134
34bf3c00
YW		 2135 link->enslaving++;
2136
f2341e0a 2137 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2138 if (r < 0) {
f2341e0a
LP		 2139 log_struct_errno(LOG_WARNING, r,
2140 LOG_LINK_INTERFACE(link),
2141 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2142 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2143 link_enter_failed(link);
2144 return r;
2145 }
326cb406
SS		 2146 }
2147
34bf3c00
YW		 2148 if (link->enslaving == 0)
2149 return link_joined(link);
2150
ef1ba606
TG		 2151 return 0;
2152}
2153
769d324c 2154static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2155 int r;
2156
765afd5c 2157 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2158 return 0;
2159
765afd5c
LP		 2160 /* We propagate the forwarding flag from one interface to the
2161 * global setting one way. This means: as long as at least one
2162 * interface was configured at any time that had IP forwarding
2163 * enabled the setting will stay on for good. We do this
2164 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2165 * somewhat in sync (see below). */
15dee3f0 2166
62e021a9 2167 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2168 if (r < 0)
765afd5c 2169 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2170
769d324c
LP		 2171 return 0;
2172}
2173
2174static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2175 int r;
2176
765afd5c 2177 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2178 return 0;
2179
61233823 2180 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2181 * packet forwarding setting: either packet forwarding is on
2182 * for all, or off for all. We hence don't bother with a
2183 * per-interface setting, but simply propagate the interface
2184 * flag, if it is set, to the global flag, one-way. Note that
2185 * while IPv4 would allow a per-interface flag, we expose the
2186 * same behaviour there and also propagate the setting from
2187 * one to all, to keep things simple (see above). */
15dee3f0 2188
62e021a9 2189 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2190 if (r < 0)
765afd5c 2191 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2192
2193 return 0;
2194}
2195
49092e22 2196static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2197 IPv6PrivacyExtensions s;
49092e22
SS		 2198 int r;
2199
1f0d9695 2200 s = link_ipv6_privacy_extensions(link);
66a6bd68 2201 if (s < 0)
49092e22
SS		 2202 return 0;
2203
62e021a9 2204 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2205 if (r < 0)
49092e22
SS		 2206 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2207
2208 return 0;
2209}
2210
4f2e437a 2211static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2212 int r;
2213
2214 /* Make this a NOP if IPv6 is not available */
2215 if (!socket_ipv6_is_supported())
2216 return 0;
2217
2218 if (link->flags & IFF_LOOPBACK)
2219 return 0;
2220
d68e2e59
LP		 2221 if (!link->network)
2222 return 0;
2223
62e021a9 2224 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2225 if (r < 0)
fe307276 2226 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2227
2228 return 0;
2229}
2230
8749cbcd 2231static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2232 int r;
2233
2234 /* Make this a NOP if IPv6 is not available */
2235 if (!socket_ipv6_is_supported())
2236 return 0;
2237
2238 if (link->flags & IFF_LOOPBACK)
2239 return 0;
2240
d68e2e59
LP		 2241 if (!link->network)
2242 return 0;
2243
8749cbcd
SS		 2244 if (link->network->ipv6_dad_transmits < 0)
2245 return 0;
2246
62e021a9 2247 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2248 if (r < 0)
8749cbcd 2249 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2250
2251 return 0;
2252}
2253
b69c3180 2254static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2255 int r;
2256
2257 /* Make this a NOP if IPv6 is not available */
2258 if (!socket_ipv6_is_supported())
2259 return 0;
2260
2261 if (link->flags & IFF_LOOPBACK)
2262 return 0;
2263
d68e2e59
LP		 2264 if (!link->network)
2265 return 0;
2266
b69c3180
SS		 2267 if (link->network->ipv6_hop_limit < 0)
2268 return 0;
2269
62e021a9 2270 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2271 if (r < 0)
b69c3180 2272 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2273
2274 return 0;
2275}
2276
11102cba 2277static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2278 int r;
2279
2280 /* Make this a NOP if IPv6 is not available */
2281 if (!socket_ipv6_is_supported())
2282 return 0;
2283
2284 if (link->flags & IFF_LOOPBACK)
2285 return 0;
2286
2287 if (link->network->ipv6_mtu == 0)
2288 return 0;
2289
62e021a9 2290 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2291 if (r < 0)
2292 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2293
2294 return 0;
2295}
2296
30226d27
TJ		 2297static bool link_is_static_address_configured(Link *link, Address *address) {
2298 Address *net_address;
2299
2300 assert(link);
2301 assert(address);
2302
2303 if (!link->network)
2304 return false;
2305
2306 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2307 if (address_equal(net_address, address))
2308 return true;
2309
2310 return false;
2311}
2312
7ecf0c3e
TJ		 2313static bool link_is_static_route_configured(Link *link, Route *route) {
2314 Route *net_route;
2315
2316 assert(link);
2317 assert(route);
2318
2319 if (!link->network)
2320 return false;
2321
2322 LIST_FOREACH(routes, net_route, link->network->static_routes)
2323 if (route_equal(net_route, route))
2324 return true;
2325
2326 return false;
2327}
2328
db51778f
YW		 2329static bool link_address_is_dynamic(Link *link, Address *address) {
2330 Route *route;
2331 Iterator i;
2332
2333 assert(link);
2334 assert(address);
2335
2336 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2337 return true;
2338
2339 /* Even when the address is leased from a DHCP server, networkd assign the address
2340 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2341 * corresponding routes with RTPROT_DHCP. */
2342 SET_FOREACH(route, link->routes_foreign, i) {
2343 if (route->protocol != RTPROT_DHCP)
2344 continue;
2345
2346 if (address->family != route->family)
2347 continue;
2348
2349 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2350 return true;
2351 }
2352
2353 return false;
2354}
2355
5e5b137a
TG		 2356static int link_drop_foreign_config(Link *link) {
2357 Address *address;
2358 Route *route;
2359 Iterator i;
2360 int r;
2361
2362 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2363 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2364 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2365 continue;
2366
db51778f
YW		 2367 if (link_address_is_dynamic(link, address)) {
2368 if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2369 continue;
2370 } else if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2371 continue;
2372
30226d27
TJ		 2373 if (link_is_static_address_configured(link, address)) {
2374 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2375 if (r < 0)
2376 return log_link_error_errno(link, r, "Failed to add address: %m");
2377 } else {
63ae0569 2378 r = address_remove(address, link, NULL);
30226d27
TJ		 2379 if (r < 0)
2380 return r;
2381 }
5e5b137a
TG		 2382 }
2383
2384 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2385 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2386 if (route->protocol == RTPROT_KERNEL)
2387 continue;
2388
db51778f
YW		 2389 if (route->protocol == RTPROT_STATIC &&
2390 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2391 continue;
2392
2393 if (route->protocol == RTPROT_DHCP &&
2394 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2395 continue;
2396
7ecf0c3e
TJ		 2397 if (link_is_static_route_configured(link, route)) {
2398 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2399 if (r < 0)
2400 return r;
2401 } else {
4645ad47 2402 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2403 if (r < 0)
2404 return r;
2405 }
5e5b137a
TG		 2406 }
2407
2408 return 0;
2409}
2410
3104883d 2411static int link_drop_config(Link *link) {
410a7f15 2412 Address *address, *pool_address;
3104883d
SS		 2413 Route *route;
2414 Iterator i;
2415 int r;
2416
2417 SET_FOREACH(address, link->addresses, i) {
2418 /* we consider IPv6LL addresses to be managed by the kernel */
2419 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2420 continue;
2421
63ae0569 2422 r = address_remove(address, link, NULL);
3104883d
SS		 2423 if (r < 0)
2424 return r;
410a7f15
RM		 2425
2426 /* If this address came from an address pool, clean up the pool */
2427 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2428 if (address_equal(address, pool_address)) {
2429 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2430 address_free(pool_address);
2431 break;
2432 }
2433 }
3104883d
SS		 2434 }
2435
2436 SET_FOREACH(route, link->routes, i) {
2437 /* do not touch routes managed by the kernel */
2438 if (route->protocol == RTPROT_KERNEL)
2439 continue;
2440
4645ad47 2441 r = route_remove(route, link, NULL);
3104883d
SS		 2442 if (r < 0)
2443 return r;
2444 }
2445
c69305ff
LP		 2446 ndisc_flush(link);
2447
3104883d
SS		 2448 return 0;
2449}
2450
a748b692 2451static int link_configure(Link *link) {
02b59d57
TG		 2452 int r;
2453
ef1ba606 2454 assert(link);
b22d8a00 2455 assert(link->network);
bd08ce56 2456 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2457
cab042b8 2458 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
93ea7750 2459 return link_configure_can(link);
92c918b0 2460
02e28621
ДГ		 2461 /* Drop foreign config, but ignore loopback or critical devices.
2462 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2463 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2464 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2465 r = link_drop_foreign_config(link);
2466 if (r < 0)
2467 return r;
2468 }
5e5b137a 2469
23d8b221
SS		 2470 r = link_set_proxy_arp(link);
2471 if (r < 0)
2472 return r;
2473
a0e5c15d
FK		 2474 r = ipv6_proxy_ndp_addresses_configure(link);
2475 if (r < 0)
2476 return r;
2477
769d324c
LP		 2478 r = link_set_ipv4_forward(link);
2479 if (r < 0)
2480 return r;
2481
2482 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2483 if (r < 0)
2484 return r;
2485
49092e22
SS		 2486 r = link_set_ipv6_privacy_extensions(link);
2487 if (r < 0)
2488 return r;
2489
4f2e437a
SS		 2490 r = link_set_ipv6_accept_ra(link);
2491 if (r < 0)
2492 return r;
2493
8749cbcd
SS		 2494 r = link_set_ipv6_dad_transmits(link);
2495 if (r < 0)
2496 return r;
b69c3180
SS		 2497
2498 r = link_set_ipv6_hop_limit(link);
2499 if (r < 0)
2500 return r;
8749cbcd 2501
99d2baa2
SS		 2502 r = link_set_flags(link);
2503 if (r < 0)
2504 return r;
2505
11102cba
SS		 2506 r = link_set_ipv6_mtu(link);
2507 if (r < 0)
2508 return r;
2509
910feb78 2510 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2511 r = ipv4ll_configure(link);
eb34d4af
TG		 2512 if (r < 0)
2513 return r;
2514 }
2515
78c958f8 2516 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2517 r = dhcp4_set_promote_secondaries(link);
2518 if (r < 0)
2519 return r;
2520
3c9b8860 2521 r = dhcp4_configure(link);
eb34d4af
TG		 2522 if (r < 0)
2523 return r;
eb34d4af
TG		 2524 }
2525
78c958f8 2526 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2527 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2528 if (r < 0)
2529 return r;
2530
2531 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2532 if (r < 0)
2533 return r;
dd43110f
TG		 2534 }
2535
62379e88
TG		 2536 if (link_dhcp6_enabled(link) ||
2537 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2538 r = dhcp6_configure(link);
2539 if (r < 0)
2540 return r;
2541 }
2542
2543 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2544 r = ndisc_configure(link);
4138fb2c
PF		 2545 if (r < 0)
2546 return r;
2547 }
2548
7465dd22
PF		 2549 if (link_radv_enabled(link)) {
2550 r = radv_configure(link);
2551 if (r < 0)
2552 return r;
2553 }
2554
8e1ad1ea 2555 if (link_lldp_rx_enabled(link)) {
7f853950 2556 r = link_lldp_rx_configure(link);
273eec24
LP		 2557 if (r < 0)
2558 return r;
ce43e484
SS		 2559 }
2560
f6fcc1c2 2561 r = link_configure_mtu(link);
40288ece
YW		 2562 if (r < 0)
2563 return r;
44b598a1 2564
9f6e82e6
YW		 2565 r = link_configure_addrgen_mode(link);
2566 if (r < 0)
2567 return r;
0e2fdb83 2568
55dc8c4a
YW		 2569 return link_configure_after_setting_mtu(link);
2570}
2571
2572static int link_configure_after_setting_mtu(Link *link) {
2573 int r;
2574
2575 assert(link);
2576 assert(link->network);
bd08ce56 2577 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2578
2579 if (link->setting_mtu)
2580 return 0;
2581
dad2d78e 2582 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2583 r = link_acquire_conf(link);
2584 if (r < 0)
2585 return r;
cc544d5f 2586 }
1e9be60b 2587
3f265037 2588 return link_enter_join_netdev(link);
505f8da7
TG		 2589}
2590
27dfc982
YW		 2591static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2592 assert(duid);
2593
2594 if (duid->raw_data_len > 0)
2595 return 0;
2596
2597 if (duid->type != DUID_TYPE_UUID)
2598 return -EINVAL;
2599
2600 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2601 duid->raw_data_len = sizeof(sd_id128_t);
2602
2603 return 1;
2604}
2605
2606int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2607 Manager *manager = userdata;
2608 const sd_bus_error *e;
2609 const void *a;
2610 size_t sz;
2611 DUID *duid;
2612 Link *link;
2613 int r;
2614
2615 assert(m);
2616 assert(manager);
2617
2618 e = sd_bus_message_get_error(m);
2619 if (e) {
2620 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2621 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2622 e->message);
2623 goto configure;
2624 }
2625
2626 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2627 if (r < 0)
2628 goto configure;
2629
2630 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2631 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2632 goto configure;
2633 }
2634
2635 memcpy(&manager->product_uuid, a, sz);
2636 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2637 (void) duid_set_uuid(duid, manager->product_uuid);
2638
2639 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2640
2641configure:
2642 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2643 r = link_configure(link);
2644 if (r < 0)
2645 log_link_error_errno(link, r, "Failed to configure link: %m");
2646 }
2647
2648 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2649
2650 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2651 * even if the method fails. */
2652 manager->has_product_uuid = true;
2653
2654 return 1;
2655}
2656
2657static bool link_requires_uuid(Link *link) {
2658 const DUID *duid;
2659
2660 assert(link);
2661 assert(link->manager);
2662 assert(link->network);
2663
2664 duid = link_get_duid(link);
2665 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2666 return false;
2667
2668 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2669 return true;
2670
2671 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2672 return true;
2673
2674 return false;
2675}
2676
2677static int link_configure_duid(Link *link) {
2678 Manager *m;
2679 DUID *duid;
2680 int r;
2681
2682 assert(link);
2683 assert(link->manager);
2684 assert(link->network);
2685
2686 m = link->manager;
2687 duid = link_get_duid(link);
2688
2689 if (!link_requires_uuid(link))
2690 return 1;
2691
2692 if (m->has_product_uuid) {
2693 (void) duid_set_uuid(duid, m->product_uuid);
2694 return 1;
2695 }
2696
2697 if (!m->links_requesting_uuid) {
2698 r = manager_request_product_uuid(m, link);
2699 if (r < 0) {
2700 if (r == -ENOMEM)
2701 return r;
2702
ab4dd984
ZJS		 2703 log_link_warning_errno(link, r,
2704 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2705 return 1;
2706 }
2707 } else {
2708 r = set_put(m->links_requesting_uuid, link);
2709 if (r < 0)
2710 return log_oom();
2711
2712 r = set_put(m->duids_requesting_uuid, duid);
2713 if (r < 0)
2714 return log_oom();
2715 }
2716
2717 return 0;
2718}
2719
e6bf7774 2720static int link_initialized_and_synced(Link *link) {
505f8da7 2721 Network *network;
505f8da7
TG		 2722 int r;
2723
2724 assert(link);
2725 assert(link->ifname);
2726 assert(link->manager);
2727
bd08ce56
YW		 2728 /* We may get called either from the asynchronous netlink callback,
2729 * or directly for link_add() if running in a container. See link_add(). */
2730 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2731 return 0;
505f8da7 2732
6a7a4e4d 2733 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2734 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2735
0d4ad91d
AR		 2736 r = link_new_bound_by_list(link);
2737 if (r < 0)
2738 return r;
2739
2740 r = link_handle_bound_by_list(link);
2741 if (r < 0)
2742 return r;
2743
c4a03a56 2744 if (!link->network) {
51517f9e 2745 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2746 &link->mac, &network);
2747 if (r == -ENOENT) {
2748 link_enter_unmanaged(link);
4232cf04 2749 return 0;
a09dc546
DM		 2750 } else if (r == 0 && network->unmanaged) {
2751 link_enter_unmanaged(link);
2752 return 0;
c4a03a56
TG		 2753 } else if (r < 0)
2754 return r;
505f8da7 2755
c4a03a56
TG		 2756 if (link->flags & IFF_LOOPBACK) {
2757 if (network->link_local != ADDRESS_FAMILY_NO)
2758 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2759
c4a03a56
TG		 2760 if (network->dhcp != ADDRESS_FAMILY_NO)
2761 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2762
c4a03a56
TG		 2763 if (network->dhcp_server)
2764 log_link_debug(link, "Ignoring DHCP server for loopback link");
2765 }
bd2efe92 2766
7d342c03 2767 r = network_apply(network, link);
c4a03a56
TG		 2768 if (r < 0)
2769 return r;
2770 }
505f8da7 2771
0d4ad91d
AR		 2772 r = link_new_bound_to_list(link);
2773 if (r < 0)
2774 return r;
2775
27dfc982
YW		 2776 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2777 * link_configure() is called later asynchronously. */
2778 r = link_configure_duid(link);
2779 if (r <= 0)
2780 return r;
2781
a748b692
TG		 2782 r = link_configure(link);
2783 if (r < 0)
2784 return r;
2785
4232cf04 2786 return 0;
505f8da7
TG		 2787}
2788
302a796f
YW		 2789static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2790 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2791 return 1;
2792}
2793
51517f9e 2794int link_initialized(Link *link, sd_device *device) {
4afd3348 2795 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2796 int r;
2797
2798 assert(link);
2799 assert(link->manager);
2800 assert(link->manager->rtnl);
2801 assert(device);
2802
8434fd5c 2803 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2804 return 0;
2805
51517f9e 2806 if (link->sd_device)
679b3605
TG		 2807 return 0;
2808
79008bdd 2809 log_link_debug(link, "udev initialized link");
bd08ce56 2810 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2811
51517f9e 2812 link->sd_device = sd_device_ref(device);
4f561e8e 2813
3c9b8860
TG		 2814 /* udev has initialized the link, but we don't know if we have yet
2815 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2816 * when it returns we know that the pending NEWLINKs have already been
2817 * processed and that we are up-to-date */
4f561e8e 2818
3c9b8860
TG		 2819 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2820 link->ifindex);
4f561e8e
TG		 2821 if (r < 0)
2822 return r;
2823
302a796f
YW		 2824 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2825 link_netlink_destroy_callback, link);
4f561e8e
TG		 2826 if (r < 0)
2827 return r;
2828
5da8149f
TG		 2829 link_ref(link);
2830
4f561e8e
TG		 2831 return 0;
2832}
2833
c4a03a56 2834static int link_load(Link *link) {
0bc70f1d
TG		 2835 _cleanup_free_ char *network_file = NULL,
2836 *addresses = NULL,
f703cc2c 2837 *routes = NULL,
0bc70f1d
TG		 2838 *dhcp4_address = NULL,
2839 *ipv4ll_address = NULL;
2840 union in_addr_union address;
f703cc2c 2841 union in_addr_union route_dst;
c598ac76 2842 const char *p;
c4a03a56
TG		 2843 int r;
2844
2845 assert(link);
2846
aa8fbc74 2847 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2848 "NETWORK_FILE", &network_file,
2849 "ADDRESSES", &addresses,
f703cc2c 2850 "ROUTES", &routes,
0bc70f1d 2851 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2852 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2853 if (r < 0 && r != -ENOENT)
2854 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2855
2856 if (network_file) {
2857 Network *network;
2858 char *suffix;
2859
2860 /* drop suffix */
2861 suffix = strrchr(network_file, '.');
2862 if (!suffix) {
2863 log_link_debug(link, "Failed to get network name from %s", network_file);
2864 goto network_file_fail;
2865 }
2866 *suffix = '\0';
2867
2868 r = network_get_by_name(link->manager, basename(network_file), &network);
2869 if (r < 0) {
2870 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2871 goto network_file_fail;
2872 }
2873
7d342c03 2874 r = network_apply(network, link);
c4a03a56
TG		 2875 if (r < 0)
2876 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2877 }
2878
2879network_file_fail:
2880
2881 if (addresses) {
c598ac76 2882 p = addresses;
c4a03a56 2883
c598ac76
TG		 2884 for (;;) {
2885 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2886 char *prefixlen_str;
2887 int family;
2888 unsigned char prefixlen;
c4a03a56 2889
c598ac76
TG		 2890 r = extract_first_word(&p, &address_str, NULL, 0);
2891 if (r < 0) {
2892 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2893 continue;
928bc597
TA		 2894 }
2895 if (r == 0)
c598ac76
TG		 2896 break;
2897
2898 prefixlen_str = strchr(address_str, '/');
c4a03a56 2899 if (!prefixlen_str) {
c598ac76 2900 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2901 continue;
2902 }
2903
313cefa1 2904 *prefixlen_str++ = '\0';
c4a03a56
TG		 2905
2906 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2907 if (r != 1) {
2908 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2909 continue;
2910 }
2911
c598ac76 2912 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2913 if (r < 0) {
c598ac76 2914 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2915 continue;
2916 }
2917
2918 r = address_add(link, family, &address, prefixlen, NULL);
2919 if (r < 0)
2920 return log_link_error_errno(link, r, "Failed to add address: %m");
2921 }
2922 }
2923
f703cc2c 2924 if (routes) {
74544b4e
TA		 2925 p = routes;
2926
c598ac76 2927 for (;;) {
f833694d 2928 Route *route;
c598ac76 2929 _cleanup_free_ char *route_str = NULL;
4afd3348 2930 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2931 usec_t lifetime;
f703cc2c
TG		 2932 char *prefixlen_str;
2933 int family;
2934 unsigned char prefixlen, tos, table;
2935 uint32_t priority;
2936
c598ac76
TG		 2937 r = extract_first_word(&p, &route_str, NULL, 0);
2938 if (r < 0) {
2939 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2940 continue;
928bc597
TA		 2941 }
2942 if (r == 0)
c598ac76
TG		 2943 break;
2944
2945 prefixlen_str = strchr(route_str, '/');
f703cc2c 2946 if (!prefixlen_str) {
c598ac76 2947 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2948 continue;
2949 }
2950
313cefa1 2951 *prefixlen_str++ = '\0';
f703cc2c 2952
f833694d
TG		 2953 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2954 if (r != 5) {
2955 log_link_debug(link,
2956 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2957 prefixlen_str);
f703cc2c
TG		 2958 continue;
2959 }
2960
c598ac76 2961 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2962 if (r < 0) {
c598ac76 2963 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2964 continue;
2965 }
2966
f833694d 2967 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2968 if (r < 0)
2969 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 2970
f02ba163 2971 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 2972 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2973 0, route_expire_handler, route);
2974 if (r < 0)
2975 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2976 }
2977
2978 route->lifetime = lifetime;
2979 sd_event_source_unref(route->expire);
1cc6c93a 2980 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 2981 }
2982 }
2983
0bc70f1d
TG		 2984 if (dhcp4_address) {
2985 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2986 if (r < 0) {
b68d26b8 2987 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2988 goto dhcp4_address_fail;
2989 }
2990
b1c626f6 2991 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 2992 if (r < 0)
b68d26b8 2993 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 2994
2995 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2996 if (r < 0)
b68d26b8 2997 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2998 }
2999
3000dhcp4_address_fail:
3001
3002 if (ipv4ll_address) {
3003 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3004 if (r < 0) {
b68d26b8 3005 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3006 goto ipv4ll_address_fail;
3007 }
3008
3009 r = sd_ipv4ll_new(&link->ipv4ll);
3010 if (r < 0)
b68d26b8 3011 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3012
3013 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3014 if (r < 0)
b68d26b8 3015 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3016 }
3017
3018ipv4ll_address_fail:
3019
c4a03a56
TG		 3020 return 0;
3021}
3022
1c4baffc 3023int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3024 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3025 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3026 Link *link;
5a937ea2 3027 int r;
505f8da7
TG		 3028
3029 assert(m);
fbbeb65a 3030 assert(m->rtnl);
505f8da7
TG		 3031 assert(message);
3032 assert(ret);
3033
3034 r = link_new(m, message, ret);
3035 if (r < 0)
3036 return r;
3037
3038 link = *ret;
3039
6a7a4e4d 3040 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3041
c4a03a56
TG		 3042 r = link_load(link);
3043 if (r < 0)
3044 return r;
3045
75f86906 3046 if (detect_container() <= 0) {
505f8da7 3047 /* not in a container, udev will be around */
ae06ab10 3048 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3049 r = sd_device_new_from_device_id(&device, ifindex_str);
3050 if (r < 0) {
3051 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3052 goto failed;
3053 }
505f8da7 3054
5a937ea2 3055 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3056 if (r < 0) {
3057 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3058 goto failed;
3059 }
5a937ea2 3060 if (r == 0) {
505f8da7 3061 /* not yet ready */
79008bdd 3062 log_link_debug(link, "link pending udev initialization...");
505f8da7 3063 return 0;
3c4cb064 3064 }
505f8da7 3065
299ad32d
YW		 3066 r = device_is_renaming(device);
3067 if (r < 0) {
3068 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3069 goto failed;
3070 }
3071 if (r > 0) {
3072 log_link_debug(link, "Interface is under renaming, pending initialization.");
3073 return 0;
3074 }
3075
4f561e8e
TG		 3076 r = link_initialized(link, device);
3077 if (r < 0)
5c416fc4 3078 goto failed;
4f561e8e 3079 } else {
e6bf7774 3080 r = link_initialized_and_synced(link);
4f561e8e 3081 if (r < 0)
5c416fc4 3082 goto failed;
4f561e8e 3083 }
505f8da7 3084
a748b692 3085 return 0;
5c416fc4
TG		 3086failed:
3087 link_enter_failed(link);
3088 return r;
a748b692
TG		 3089}
3090
c601ebf7 3091int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3092 int r;
3093
3094 assert(link);
3095
3096 log_link_info(link, "Gained IPv6LL");
3097
c601ebf7 3098 link->ipv6ll_address = *address;
e7ab854c
TG		 3099 link_check_ready(link);
3100
b9ea3d2e 3101 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3102 r = link_acquire_ipv6_conf(link);
3103 if (r < 0) {
3104 link_enter_failed(link);
3105 return r;
3106 }
3107 }
3108
3109 return 0;
3110}
3111
9c0a72f9
TG		 3112static int link_carrier_gained(Link *link) {
3113 int r;
3114
3115 assert(link);
3116
b9ea3d2e 3117 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3118 r = link_acquire_conf(link);
3119 if (r < 0) {
3120 link_enter_failed(link);
3121 return r;
3122 }
6fc25497 3123
b425c3ae 3124 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3125 r = link_request_set_addresses(link);
6fc25497
SS		 3126 if (r < 0)
3127 return r;
9c0a72f9
TG		 3128 }
3129
0d4ad91d
AR		 3130 r = link_handle_bound_by_list(link);
3131 if (r < 0)
3132 return r;
3133
9c0a72f9
TG		 3134 return 0;
3135}
3136
3137static int link_carrier_lost(Link *link) {
3138 int r;
3139
3140 assert(link);
3141
25e992ba 3142 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3143 return 0;
3144
fbdb6605 3145 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3146 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3147 * configuration and stop the clients as well. */
97e7fb39
SS		 3148 if (link->setting_mtu)
3149 return 0;
3150
95355a28 3151 r = link_stop_clients(link, false);
9c0a72f9
TG		 3152 if (r < 0) {
3153 link_enter_failed(link);
3154 return r;
3155 }
3156
28464ae0
SS		 3157 if (link_dhcp4_server_enabled(link))
3158 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3159
3104883d
SS		 3160 r = link_drop_config(link);
3161 if (r < 0)
3162 return r;
3163
f258e948
MP		 3164 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3165 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3166 r = link_drop_foreign_config(link);
3167 if (r < 0)
3168 return r;
3169 }
3104883d 3170
0d4ad91d
AR		 3171 r = link_handle_bound_by_list(link);
3172 if (r < 0)
3173 return r;
3174
9c0a72f9
TG		 3175 return 0;
3176}
3177
3178int link_carrier_reset(Link *link) {
3179 int r;
3180
3181 assert(link);
3182
3183 if (link_has_carrier(link)) {
3184 r = link_carrier_lost(link);
3185 if (r < 0)
3186 return r;
3187
3188 r = link_carrier_gained(link);
3189 if (r < 0)
3190 return r;
3191
6a7a4e4d 3192 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3193 }
3194
3195 return 0;
3196}
3197
1c4baffc 3198int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3199 struct ether_addr mac;
ca4e095a 3200 const char *ifname;
afe7fd56 3201 uint32_t mtu;
a61bb41c 3202 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3203 int old_master, r;
22936833 3204
dd3efc09 3205 assert(link);
b8941f74 3206 assert(link->ifname);
22936833
TG		 3207 assert(m);
3208
7619683b 3209 if (link->state == LINK_STATE_LINGER) {
5238e957 3210 log_link_info(link, "Link re-added");
289e6774 3211 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3212
3213 r = link_new_carrier_maps(link);
3214 if (r < 0)
3215 return r;
7619683b
TG		 3216 }
3217
1c4baffc 3218 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3219 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3220 Manager *manager = link->manager;
b8941f74 3221
30de2b89 3222 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3223
30de2b89
YW		 3224 link_drop(link);
3225 r = link_add(manager, m, &link);
3226 if (r < 0)
3227 return r;
b8941f74
TG		 3228 }
3229
1c4baffc 3230 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3231 if (r >= 0 && mtu > 0) {
3232 link->mtu = mtu;
4e964aa0 3233 if (link->original_mtu == 0) {
afe7fd56 3234 link->original_mtu = mtu;
6a7a4e4d 3235 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3236 }
3237
3238 if (link->dhcp_client) {
3c9b8860
TG		 3239 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3240 link->mtu);
fc95c359
YW		 3241 if (r < 0)
3242 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3243 }
7465dd22
PF		 3244
3245 if (link->radv) {
3246 r = sd_radv_set_mtu(link->radv, link->mtu);
3247 if (r < 0)
3248 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3249 }
9842de0d 3250 }
69629de9 3251
e9189a1f
TG		 3252 /* The kernel may broadcast NEWLINK messages without the MAC address
3253 set, simply ignore them. */
1c4baffc 3254 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3255 if (r >= 0) {
3c9b8860
TG		 3256 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3257 ETH_ALEN)) {
c49b33ac 3258
3c9b8860
TG		 3259 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3260 ETH_ALEN);
c49b33ac 3261
79008bdd 3262 log_link_debug(link, "MAC address: "
20861203
TG		 3263 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3264 mac.ether_addr_octet[0],
3265 mac.ether_addr_octet[1],
3266 mac.ether_addr_octet[2],
3267 mac.ether_addr_octet[3],
3268 mac.ether_addr_octet[4],
3269 mac.ether_addr_octet[5]);
c49b33ac 3270
20861203
TG		 3271 if (link->ipv4ll) {
3272 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3273 if (r < 0)
3274 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3275 }
c49b33ac 3276
20861203 3277 if (link->dhcp_client) {
3c9b8860 3278 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3279 (const uint8_t *) &link->mac,
3280 sizeof (link->mac),
3281 ARPHRD_ETHER);
6a7a4e4d
LP		 3282 if (r < 0)
3283 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3284
fff1f40c
YW		 3285 r = dhcp4_set_client_identifier(link);
3286 if (r < 0)
3287 return r;
c49b33ac 3288 }
4138fb2c
PF		 3289
3290 if (link->dhcp6_client) {
f24648a6 3291 const DUID* duid = link_get_duid(link);
8341a5c3 3292
4138fb2c 3293 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3294 (const uint8_t *) &link->mac,
3295 sizeof (link->mac),
3296 ARPHRD_ETHER);
6a7a4e4d
LP		 3297 if (r < 0)
3298 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3299
8217ed5e
TH		 3300 if (link->network->iaid_set) {
3301 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3302 link->network->iaid);
3303 if (r < 0)
3304 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3305 }
413708d1 3306
8341a5c3
ZJS		 3307 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3308 duid->type,
3309 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3310 duid->raw_data_len);
413708d1
VK		 3311 if (r < 0)
3312 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3313 }
7465dd22
PF		 3314
3315 if (link->radv) {
3316 r = sd_radv_set_mac(link->radv, &link->mac);
3317 if (r < 0)
3318 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3319 }
420d2058
SS		 3320
3321 if (link->ndisc) {
3322 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3323 if (r < 0)
3324 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3325 }
c49b33ac 3326 }
4f882b2a
TG		 3327 }
3328
bb262ef0
YW		 3329 old_master = link->master_ifindex;
3330 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3331
a61bb41c
TG		 3332 had_carrier = link_has_carrier(link);
3333
bb262ef0 3334 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3335 if (r < 0)
3336 return r;
3337
273eec24
LP		 3338 r = link_update_lldp(link);
3339 if (r < 0)
3340 return r;
3341
a61bb41c
TG		 3342 carrier_gained = !had_carrier && link_has_carrier(link);
3343 carrier_lost = had_carrier && !link_has_carrier(link);
3344
3345 if (carrier_gained) {
6a7a4e4d 3346 log_link_info(link, "Gained carrier");
a61bb41c 3347
9c0a72f9
TG		 3348 r = link_carrier_gained(link);
3349 if (r < 0)
3350 return r;
a61bb41c 3351 } else if (carrier_lost) {
6a7a4e4d 3352 log_link_info(link, "Lost carrier");
a61bb41c 3353
9c0a72f9
TG		 3354 r = link_carrier_lost(link);
3355 if (r < 0)
a61bb41c 3356 return r;
a61bb41c
TG		 3357 }
3358
3359 return 0;
dd3efc09 3360}
fe8db0c5 3361
b295beea
LP		 3362static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3363 bool space = false;
3364 Iterator i;
3365 Link *link;
3366
3367 assert(f);
3368 assert(prefix);
3369
3370 if (hashmap_isempty(h))
3371 return;
3372
0d536673 3373 fputs(prefix, f);
b295beea
LP		 3374 HASHMAP_FOREACH(link, h, i) {
3375 if (space)
0d536673 3376 fputc(' ', f);
b295beea
LP		 3377
3378 fprintf(f, "%i", link->ifindex);
3379 space = true;
3380 }
3381
0d536673 3382 fputc('\n', f);
b295beea
LP		 3383}
3384
fe8db0c5 3385int link_save(Link *link) {
68a8723c 3386 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3387 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3388 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3389 Address *a;
c1eb9872 3390 Route *route;
e7780c8d 3391 Iterator i;
fe8db0c5
TG		 3392 int r;
3393
3394 assert(link);
3395 assert(link->state_file);
68a8723c 3396 assert(link->lease_file);
bbf7c048
TG		 3397 assert(link->manager);
3398
370e9930 3399 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3400 (void) unlink(link->state_file);
370e9930
TG		 3401 return 0;
3402 }
3403
34437b4f
LP		 3404 link_lldp_save(link);
3405
deb2e523
TG		 3406 admin_state = link_state_to_string(link->state);
3407 assert(admin_state);
3408
e375dcde
TG		 3409 oper_state = link_operstate_to_string(link->operstate);
3410 assert(oper_state);
deb2e523 3411
ac999bf0
YW		 3412 carrier_state = link_carrier_state_to_string(link->carrier_state);
3413 assert(carrier_state);
3414
3415 address_state = link_address_state_to_string(link->address_state);
3416 assert(address_state);
3417
fe8db0c5
TG		 3418 r = fopen_temporary(link->state_file, &f, &temp_path);
3419 if (r < 0)
6a7a4e4d 3420 goto fail;
fe8db0c5 3421
5512a963 3422 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3423
3424 fprintf(f,
3425 "# This is private data. Do not parse.\n"
deb2e523 3426 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3427 "OPER_STATE=%s\n"
3428 "CARRIER_STATE=%s\n"
3429 "ADDRESS_STATE=%s\n",
3430 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3431
bcb7a07e 3432 if (link->network) {
fe0e16db
YW		 3433 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3434 const char *dhcp_domainname = NULL, *p;
07bdc70d 3435 sd_dhcp6_lease *dhcp6_lease = NULL;
5512a963 3436 unsigned j;
fe0e16db 3437 bool space;
07bdc70d 3438
c1a38904
MTL		 3439 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3440 yes_no(link->network->required_for_online));
3441
4ac77d63
YW		 3442 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3443 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3444
07bdc70d 3445 if (link->dhcp6_client) {
4058d339
TG		 3446 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3447 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3448 log_link_debug(link, "No DHCPv6 lease");
3449 }
b0e39c82 3450
adc5b2e2
TG		 3451 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3452
0d536673 3453 fputs("DNS=", f);
ea352b40 3454 space = false;
5512a963
LP		 3455
3456 for (j = 0; j < link->network->n_dns; j++) {
3457 _cleanup_free_ char *b = NULL;
3458
3459 r = in_addr_to_string(link->network->dns[j].family,
3460 &link->network->dns[j].address, &b);
3461 if (r < 0) {
3462 log_debug_errno(r, "Failed to format address, ignoring: %m");
3463 continue;
3464 }
3465
3466 if (space)
0d536673
LP		 3467 fputc(' ', f);
3468 fputs(b, f);
5512a963
LP		 3469 space = true;
3470 }
d5314fff 3471
27cb34f5 3472 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3473 link->dhcp_lease) {
3474 const struct in_addr *addresses;
3475
3476 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3477 if (r > 0)
3478 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3479 space = true;
07bdc70d
PF		 3480 }
3481
caa8ca42 3482 if (link->network->dhcp6_use_dns && dhcp6_lease) {
07bdc70d
PF		 3483 struct in6_addr *in6_addrs;
3484
3485 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3486 if (r > 0) {
3487 if (space)
0d536673 3488 fputc(' ', f);
07bdc70d 3489 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3490 space = true;
3491 }
3492 }
3493
3494 /* Make sure to flush out old entries before we use the NDISC data */
3495 ndisc_vacuum(link);
3496
b296797f 3497 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3498 NDiscRDNSS *dd;
3499
3500 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3501 if (space)
0d536673 3502 fputc(' ', f);
1e7a0e21
LP		 3503
3504 serialize_in6_addrs(f, &dd->address, 1);
3505 space = true;
b0e39c82
TG		 3506 }
3507 }
3508
0d536673 3509 fputc('\n', f);
b0e39c82 3510
0d536673 3511 fputs("NTP=", f);
ea352b40 3512 space = false;
3df9bec5 3513 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3514
27cb34f5 3515 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3516 link->dhcp_lease) {
3517 const struct in_addr *addresses;
3518
3519 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3520 if (r > 0)
3521 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3522 space = true;
07bdc70d
PF		 3523 }
3524
caa8ca42 3525 if (link->network->dhcp6_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3526 struct in6_addr *in6_addrs;
3527 char **hosts;
07bdc70d
PF		 3528
3529 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3530 &in6_addrs);
3531 if (r > 0) {
3532 if (space)
0d536673 3533 fputc(' ', f);
07bdc70d
PF		 3534 serialize_in6_addrs(f, in6_addrs, r);
3535 space = true;
3536 }
3537
3538 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3539 if (r > 0)
3540 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3541 }
3542
0d536673 3543 fputc('\n', f);
bd8f6538 3544
b2a81c0b 3545 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3546 if (link->dhcp_lease) {
b2a81c0b 3547 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3548 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3549 }
b2a81c0b
LP		 3550 if (dhcp6_lease)
3551 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3552 }
3553
fe0e16db
YW		 3554 fputs("DOMAINS=", f);
3555 space = false;
3556 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3557 fputs_with_space(f, p, NULL, &space);
07bdc70d 3558
1e7a0e21 3559 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3560 if (dhcp_domainname)
3561 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3562 if (dhcp_domains)
3563 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3564 if (dhcp6_domains)
3565 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3566 }
3567
3568 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3569 NDiscDNSSL *dd;
1e7a0e21
LP		 3570
3571 SET_FOREACH(dd, link->ndisc_dnssl, i)
3572 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3573 }
b2a81c0b 3574
0d536673 3575 fputc('\n', f);
6192b846 3576
fe0e16db
YW		 3577 fputs("ROUTE_DOMAINS=", f);
3578 space = false;
3579 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3580 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3581
1e7a0e21 3582 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3583 if (dhcp_domainname)
3584 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3585 if (dhcp_domains)
3586 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3587 if (dhcp6_domains)
3588 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3589 }
3590
3591 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3592 NDiscDNSSL *dd;
1e7a0e21
LP		 3593
3594 SET_FOREACH(dd, link->ndisc_dnssl, i)
3595 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3596 }
b2a81c0b 3597
0d536673 3598 fputc('\n', f);
67272d15 3599
3c9b8860 3600 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3601 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3602 fprintf(f, "MDNS=%s\n",
3603 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3604 if (link->network->dns_default_route >= 0)
3605 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3606
c9299be2
IT		 3607 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3608 fprintf(f, "DNS_OVER_TLS=%s\n",
3609 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3610
ad6c0475
LP		 3611 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3612 fprintf(f, "DNSSEC=%s\n",
3613 dnssec_mode_to_string(link->network->dnssec_mode));
3614
8a516214
LP		 3615 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3616 const char *n;
3617
0d536673 3618 fputs("DNSSEC_NTA=", f);
8a516214 3619 space = false;
d390f8ef
LP		 3620 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3621 fputs_with_space(f, n, NULL, &space);
0d536673 3622 fputc('\n', f);
8a516214
LP		 3623 }
3624
0d536673 3625 fputs("ADDRESSES=", f);
e7780c8d
TG		 3626 space = false;
3627 SET_FOREACH(a, link->addresses, i) {
3628 _cleanup_free_ char *address_str = NULL;
3629
3630 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3631 if (r < 0)
3632 goto fail;
3633
e7780c8d
TG		 3634 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3635 space = true;
3636 }
0d536673 3637 fputc('\n', f);
c1eb9872 3638
0d536673 3639 fputs("ROUTES=", f);
c1eb9872
TG		 3640 space = false;
3641 SET_FOREACH(route, link->routes, i) {
3642 _cleanup_free_ char *route_str = NULL;
3643
3644 r = in_addr_to_string(route->family, &route->dst, &route_str);
3645 if (r < 0)
3646 goto fail;
3647
ecc3f340
ZJS		 3648 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3649 space ? " " : "", route_str,
f833694d 3650 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3651 space = true;
3652 }
3653
0d536673 3654 fputc('\n', f);
bcb7a07e 3655 }
7374f9d8 3656
b295beea
LP		 3657 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3658 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3659
8eb9058d 3660 if (link->dhcp_lease) {
0bc70f1d 3661 struct in_addr address;
8eb9058d
LP		 3662 const char *tz = NULL;
3663
0bc70f1d
TG		 3664 assert(link->network);
3665
8eb9058d
LP		 3666 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3667 if (r >= 0)
3668 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3669
0bc70f1d
TG		 3670 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3671 if (r >= 0) {
0d536673 3672 fputs("DHCP4_ADDRESS=", f);
072320ea 3673 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3674 fputc('\n', f);
0bc70f1d 3675 }
d9876a52 3676
bd91b83e 3677 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3678 if (r < 0)
c2d6bd61 3679 goto fail;
fe8db0c5 3680
7374f9d8 3681 fprintf(f,
b0e39c82
TG		 3682 "DHCP_LEASE=%s\n",
3683 link->lease_file);
deb2e523 3684 } else
6990fb6b 3685 (void) unlink(link->lease_file);
fe8db0c5 3686
0bc70f1d
TG		 3687 if (link->ipv4ll) {
3688 struct in_addr address;
3689
3690 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3691 if (r >= 0) {
0d536673 3692 fputs("IPV4LL_ADDRESS=", f);
072320ea 3693 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3694 fputc('\n', f);
0bc70f1d
TG		 3695 }
3696 }
3697
c2d6bd61
LP		 3698 r = fflush_and_check(f);
3699 if (r < 0)
3700 goto fail;
fe8db0c5 3701
c2d6bd61 3702 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3703 r = -errno;
c2d6bd61 3704 goto fail;
fe8db0c5
TG		 3705 }
3706
c2d6bd61 3707 return 0;
dacd6cee 3708
c2d6bd61 3709fail:
6a7a4e4d 3710 (void) unlink(link->state_file);
6a7a4e4d
LP		 3711 if (temp_path)
3712 (void) unlink(temp_path);
3713
dacd6cee 3714 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3715}
3716
84de38c5
TG		 3717/* The serialized state in /run is no longer up-to-date. */
3718void link_dirty(Link *link) {
3719 int r;
3720
3721 assert(link);
3722
0c241a37
SS		 3723 /* mark manager dirty as link is dirty */
3724 manager_dirty(link->manager);
3725
84de38c5
TG		 3726 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3727 if (r < 0)
3728 /* allocation errors are ignored */
3729 return;
3730
3731 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3732 if (r <= 0)
3733 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3734 return;
3735
3736 link_ref(link);
3737}
3738
3739/* The serialized state in /run is up-to-date */
3740void link_clean(Link *link) {
3741 assert(link);
3742 assert(link->manager);
3743
1046bf9b 3744 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3745}
3746
fe8db0c5 3747static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3748 [LINK_STATE_PENDING] = "pending",
bd08ce56 3749 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3750 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3751 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3752 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3753 [LINK_STATE_FAILED] = "failed",
370e9930 3754 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3755};
3756
3757DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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