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Merge pull request #179 from l10n-tw/master
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
f579559b
TG		 1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3/***
4 This file is part of systemd.
5
6 Copyright 2013 Tom Gundersen <teg@jklm.no>
7
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20***/
21
22#include <netinet/ether.h>
23#include <linux/if.h>
4cc7a82c 24#include <unistd.h>
f579559b 25
f579559b 26#include "util.h"
505f8da7 27#include "virt.h"
5a8bcb67 28#include "fileio.h"
fe027299 29#include "socket-util.h"
1346b1f0 30#include "bus-util.h"
5a8bcb67 31#include "udev-util.h"
c6f7c917 32#include "network-internal.h"
5a8bcb67
LP		 33#include "networkd-link.h"
34#include "networkd-netdev.h"
fe8db0c5 35
a97dcc12 36bool link_dhcp6_enabled(Link *link) {
78c958f8
TG		 37 if (link->flags & IFF_LOOPBACK)
38 return false;
39
40 if (!link->network)
41 return false;
42
e0ee46f2 43 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 44}
45
a97dcc12 46bool link_dhcp4_enabled(Link *link) {
78c958f8
TG		 47 if (link->flags & IFF_LOOPBACK)
48 return false;
49
50 if (!link->network)
51 return false;
52
e0ee46f2 53 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 54}
55
a97dcc12 56bool link_dhcp4_server_enabled(Link *link) {
78c958f8
TG		 57 if (link->flags & IFF_LOOPBACK)
58 return false;
59
60 if (!link->network)
61 return false;
62
63 return link->network->dhcp_server;
64}
65
a97dcc12 66bool link_ipv4ll_enabled(Link *link) {
78c958f8
TG		 67 if (link->flags & IFF_LOOPBACK)
68 return false;
69
70 if (!link->network)
71 return false;
72
e0ee46f2 73 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 74}
75
76bool link_ipv6ll_enabled(Link *link) {
77 if (link->flags & IFF_LOOPBACK)
78 return false;
79
80 if (!link->network)
81 return false;
82
e0ee46f2 83 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 84}
85
a97dcc12 86bool link_lldp_enabled(Link *link) {
ce43e484
SS		 87 if (link->flags & IFF_LOOPBACK)
88 return false;
89
90 if (!link->network)
91 return false;
92
5a8bcb67 93 if (link->network->bridge)
ce43e484
SS		 94 return false;
95
96 return link->network->lldp;
97}
98
769d324c 99static bool link_ipv4_forward_enabled(Link *link) {
5a8bcb67
LP		 100 if (link->flags & IFF_LOOPBACK)
101 return false;
102
103 if (!link->network)
104 return false;
105
e0ee46f2 106 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 107}
108
109static bool link_ipv6_forward_enabled(Link *link) {
110 if (link->flags & IFF_LOOPBACK)
111 return false;
112
113 if (!link->network)
114 return false;
115
e0ee46f2 116 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 117}
118
51d18171
TG		 119#define FLAG_STRING(string, flag, old, new) \
120 (((old ^ new) & flag) \
121 ? ((old & flag) ? (" -" string) : (" +" string)) \
122 : "")
123
124static int link_update_flags(Link *link, sd_rtnl_message *m) {
125 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
126 uint8_t operstate;
127 int r;
128
129 assert(link);
130
131 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 132 if (r < 0)
133 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171
TG		 134
135 r = sd_rtnl_message_read_u8(m, IFLA_OPERSTATE, &operstate);
136 if (r < 0)
137 /* if we got a message without operstate, take it to mean
138 the state was unchanged */
139 operstate = link->kernel_operstate;
140
141 if ((link->flags == flags) && (link->kernel_operstate == operstate))
142 return 0;
143
144 if (link->flags != flags) {
6a7a4e4d 145 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		 146 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
147 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
148 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
149 FLAG_STRING("UP", IFF_UP, link->flags, flags),
150 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
151 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
152 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
153 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
154 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
155 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
156 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
157 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
158 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
159 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
160 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
161 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
162 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
163 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
164 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
165
166 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
167 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
168 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
169 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
170 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
171 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
172 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
173 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
174
175 /* link flags are currently at most 18 bits, let's align to
176 * printing 20 */
177 if (unknown_flags_added)
79008bdd 178 log_link_debug(link,
6a7a4e4d 179 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 180 unknown_flags_added);
181
182 if (unknown_flags_removed)
79008bdd 183 log_link_debug(link,
6a7a4e4d 184 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 185 unknown_flags_removed);
186 }
187
188 link->flags = flags;
189 link->kernel_operstate = operstate;
190
191 link_save(link);
192
193 return 0;
194}
195
505f8da7 196static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) {
14b746f7 197 _cleanup_link_unref_ Link *link = NULL;
505f8da7 198 uint16_t type;
ca4e095a 199 const char *ifname;
505f8da7 200 int r, ifindex;
f579559b 201
0c2f9b84 202 assert(manager);
505f8da7 203 assert(message);
f579559b
TG		 204 assert(ret);
205
505f8da7
TG		 206 r = sd_rtnl_message_get_type(message, &type);
207 if (r < 0)
208 return r;
209 else if (type != RTM_NEWLINK)
210 return -EINVAL;
211
212 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
213 if (r < 0)
214 return r;
215 else if (ifindex <= 0)
216 return -EINVAL;
217
218 r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &ifname);
219 if (r < 0)
220 return r;
221
f579559b
TG		 222 link = new0(Link, 1);
223 if (!link)
224 return -ENOMEM;
225
14b746f7 226 link->n_ref = 1;
5a3eb5a7 227 link->manager = manager;
8434fd5c 228 link->state = LINK_STATE_PENDING;
be3a09b7 229 link->rtnl_extended_attrs = true;
505f8da7
TG		 230 link->ifindex = ifindex;
231 link->ifname = strdup(ifname);
232 if (!link->ifname)
233 return -ENOMEM;
f579559b 234
512922f8
TG		 235 r = sd_rtnl_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
236 if (r < 0)
79008bdd 237 log_link_debug(link, "MAC address not found for new device, continuing without");
512922f8 238
3c9b8860
TG		 239 r = asprintf(&link->state_file, "/run/systemd/netif/links/%d",
240 link->ifindex);
fe8db0c5 241 if (r < 0)
315db1a8 242 return -ENOMEM;
fe8db0c5 243
3c9b8860
TG		 244 r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%d",
245 link->ifindex);
68a8723c
TG		 246 if (r < 0)
247 return -ENOMEM;
248
49699bac
SS		 249 r = asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d",
250 link->ifindex);
251 if (r < 0)
252 return -ENOMEM;
253
254
d5099efc 255 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 256 if (r < 0)
257 return r;
258
259 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 260 if (r < 0)
261 return r;
262
51d18171
TG		 263 r = link_update_flags(link, message);
264 if (r < 0)
265 return r;
266
f579559b
TG		 267 *ret = link;
268 link = NULL;
269
270 return 0;
271}
272
14b746f7 273static void link_free(Link *link) {
428fd0a7 274 Address *address;
0d4ad91d
AR		 275 Iterator i;
276 Link *carrier;
428fd0a7 277
f579559b
TG		 278 if (!link)
279 return;
280
428fd0a7
TG		 281 while ((address = link->addresses)) {
282 LIST_REMOVE(addresses, link->addresses, address);
283 address_free(address);
284 }
285
11bf3cce
LP		 286 while ((address = link->pool_addresses)) {
287 LIST_REMOVE(addresses, link->pool_addresses, address);
288 address_free(address);
289 }
290
bfcdba8d 291 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 292 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 293 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 294
68a8723c
TG		 295 free(link->lease_file);
296
07e10d1a
TG		 297 sd_lldp_free(link->lldp);
298
49699bac
SS		 299 free(link->lldp_file);
300
56cd007a 301 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 302 sd_dhcp6_client_unref(link->dhcp6_client);
6b66097b 303 sd_icmp6_nd_unref(link->icmp6_router_discovery);
4138fb2c 304
28aeb07f 305 if (link->manager)
ae06ab10 306 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 307
c166a070 308 free(link->ifname);
68a8723c 309
fe8db0c5 310 free(link->state_file);
c166a070 311
b5db00e5
UTL		 312 udev_device_unref(link->udev_device);
313
0d4ad91d
AR		 314 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
315 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
316 hashmap_free(link->bound_to_links);
317
318 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
319 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
320 hashmap_free(link->bound_by_links);
321
f579559b
TG		 322 free(link);
323}
324
14b746f7
TG		 325Link *link_unref(Link *link) {
326 if (link && (-- link->n_ref <= 0))
327 link_free(link);
328
329 return NULL;
330}
331
332Link *link_ref(Link *link) {
333 if (link)
334 assert_se(++ link->n_ref >= 2);
335
336 return link;
337}
338
11a7f229
TG		 339int link_get(Manager *m, int ifindex, Link **ret) {
340 Link *link;
11a7f229
TG		 341
342 assert(m);
11a7f229
TG		 343 assert(ifindex);
344 assert(ret);
345
ae06ab10 346 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 347 if (!link)
348 return -ENODEV;
349
350 *ret = link;
351
352 return 0;
353}
354
e331e246
TG		 355static void link_set_state(Link *link, LinkState state) {
356 assert(link);
357
358 if (link->state == state)
359 return;
360
361 link->state = state;
362
363 link_send_changed(link, "AdministrativeState", NULL);
364
365 return;
366}
367
57bd6899
TG		 368static void link_enter_unmanaged(Link *link) {
369 assert(link);
370
6a7a4e4d 371 log_link_debug(link, "Unmanaged");
57bd6899 372
e331e246 373 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899
TG		 374
375 link_save(link);
376}
377
111bb8f9
TG		 378static int link_stop_clients(Link *link) {
379 int r = 0, k;
380
381 assert(link);
382 assert(link->manager);
383 assert(link->manager->event);
384
385 if (!link->network)
386 return 0;
387
ba179154 388 if (link->dhcp_client) {
111bb8f9 389 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d
LP		 390 if (k < 0)
391 r = log_link_warning_errno(link, r, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 392 }
393
ba179154 394 if (link->ipv4ll) {
111bb8f9 395 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d
LP		 396 if (k < 0)
397 r = log_link_warning_errno(link, r, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 398 }
399
ba179154 400 if(link->icmp6_router_discovery) {
1873a3d3
PF		 401 if (link->dhcp6_client) {
402 k = sd_dhcp6_client_stop(link->dhcp6_client);
6a7a4e4d
LP		 403 if (k < 0)
404 r = log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
1873a3d3 405 }
4138fb2c 406
1873a3d3 407 k = sd_icmp6_nd_stop(link->icmp6_router_discovery);
6a7a4e4d
LP		 408 if (k < 0)
409 r = log_link_warning_errno(link, r, "Could not stop ICMPv6 router discovery: %m");
4138fb2c
PF		 410 }
411
ce43e484 412 if (link->lldp) {
ce43e484 413 k = sd_lldp_stop(link->lldp);
6a7a4e4d
LP		 414 if (k < 0)
415 r = log_link_warning_errno(link, r, "Could not stop LLDP: %m");
ce43e484
SS		 416 }
417
111bb8f9
TG		 418 return r;
419}
420
b22d8a00 421void link_enter_failed(Link *link) {
ef1ba606 422 assert(link);
f882c247 423
370e9930 424 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 425 return;
426
6a7a4e4d 427 log_link_warning(link, "Failed");
449f7554 428
e331e246 429 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 430
111bb8f9
TG		 431 link_stop_clients(link);
432
fe8db0c5 433 link_save(link);
f882c247
TG		 434}
435
4f434938
LP		 436static Address* link_find_dhcp_server_address(Link *link) {
437 Address *address;
438
439 assert(link);
440 assert(link->network);
441
d4cdbea5 442 /* The first statically configured address if there is any */
4f434938
LP		 443 LIST_FOREACH(addresses, address, link->network->static_addresses) {
444
445 if (address->family != AF_INET)
446 continue;
447
af93291c 448 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 449 continue;
450
451 return address;
452 }
453
454 /* If that didn't work, find a suitable address we got from the pool */
455 LIST_FOREACH(addresses, address, link->pool_addresses) {
456 if (address->family != AF_INET)
457 continue;
458
459 return address;
460 }
461
462 return NULL;
463}
464
dd43110f 465static int link_enter_configured(Link *link) {
dd43110f
TG		 466 assert(link);
467 assert(link->network);
468 assert(link->state == LINK_STATE_SETTING_ROUTES);
469
6a7a4e4d 470 log_link_info(link, "Configured");
dd43110f 471
e331e246 472 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f
TG		 473
474 link_save(link);
475
476 return 0;
477}
478
3c9b8860
TG		 479void link_client_handler(Link *link) {
480 assert(link);
481 assert(link->network);
482
483 if (!link->static_configured)
484 return;
485
78c958f8 486 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 487 if (!link->ipv4ll_address ||
488 !link->ipv4ll_route)
489 return;
490
78c958f8 491 if (link_dhcp4_enabled(link) && !link->dhcp4_configured)
3c9b8860
TG		 492 return;
493
9fdaa992
TG		 494 if (link->state != LINK_STATE_CONFIGURED)
495 link_enter_configured(link);
3c9b8860
TG		 496
497 return;
498}
499
f882c247 500static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
5da8149f 501 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 502 int r;
503
3c9b8860 504 assert(link->link_messages > 0);
370e9930
TG		 505 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
506 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
507 LINK_STATE_LINGER));
f882c247 508
3c9b8860 509 link->link_messages --;
f882c247 510
77a008c0 511 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 512 return 1;
513
514 r = sd_rtnl_message_get_errno(m);
c166a070 515 if (r < 0 && r != -EEXIST)
6a7a4e4d 516 log_link_warning_errno(link, r, "%-*s: could not set route: %m", IFNAMSIZ, link->ifname);
f882c247 517
3c9b8860 518 if (link->link_messages == 0) {
6a7a4e4d 519 log_link_debug(link, "Routes set");
3c9b8860
TG		 520 link->static_configured = true;
521 link_client_handler(link);
dd3efc09 522 }
f882c247
TG		 523
524 return 1;
525}
526
527static int link_enter_set_routes(Link *link) {
a6cc569e 528 Route *rt;
f882c247
TG		 529 int r;
530
531 assert(link);
532 assert(link->network);
ef1ba606 533 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 534
e331e246 535 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 536
3d3d4255 537 LIST_FOREACH(routes, rt, link->network->static_routes) {
a6cc569e 538 r = route_configure(rt, link, &route_handler);
dd3efc09 539 if (r < 0) {
6a7a4e4d 540 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 541 link_enter_failed(link);
a6cc569e
TG		 542 return r;
543 }
544
3c9b8860 545 link->link_messages ++;
8ddbeaa2 546 }
f5be5601 547
3c9b8860
TG		 548 if (link->link_messages == 0) {
549 link->static_configured = true;
550 link_client_handler(link);
431ca2ce 551 } else
6a7a4e4d 552 log_link_debug(link, "Setting routes");
f882c247
TG		 553
554 return 0;
555}
556
b22d8a00 557int link_route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
5da8149f 558 _cleanup_link_unref_ Link *link = userdata;
5c1d3fc9
UTL		 559 int r;
560
561 assert(m);
562 assert(link);
563 assert(link->ifname);
564
5da8149f 565 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 566 return 1;
567
568 r = sd_rtnl_message_get_errno(m);
b90b025a 569 if (r < 0 && r != -ESRCH)
6a7a4e4d 570 log_link_warning_errno(link, r, "%-*s: could not drop route: %m", IFNAMSIZ, link->ifname);
5c1d3fc9 571
5bdd314c 572 return 1;
5c1d3fc9
UTL		 573}
574
f882c247 575static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
5da8149f 576 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 577 int r;
578
4958aee4 579 assert(rtnl);
f5be5601
TG		 580 assert(m);
581 assert(link);
582 assert(link->ifname);
3c9b8860 583 assert(link->link_messages > 0);
370e9930
TG		 584 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
585 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 586
3c9b8860 587 link->link_messages --;
f882c247 588
5da8149f 589 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 590 return 1;
591
592 r = sd_rtnl_message_get_errno(m);
c166a070 593 if (r < 0 && r != -EEXIST)
6a7a4e4d 594 log_link_warning_errno(link, r, "%-*s: could not set address: %m", IFNAMSIZ, link->ifname);
45af44d4
TG		 595 else if (r >= 0)
596 link_rtnl_process_address(rtnl, m, link->manager);
f882c247 597
3c9b8860 598 if (link->link_messages == 0) {
6a7a4e4d 599 log_link_debug(link, "Addresses set");
ef1ba606 600 link_enter_set_routes(link);
dd3efc09 601 }
f882c247
TG		 602
603 return 1;
604}
605
606static int link_enter_set_addresses(Link *link) {
a6cc569e 607 Address *ad;
f882c247
TG		 608 int r;
609
610 assert(link);
611 assert(link->network);
f5be5601 612 assert(link->state != _LINK_STATE_INVALID);
f882c247 613
e331e246 614 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 615
3d3d4255 616 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a6cc569e 617 r = address_configure(ad, link, &address_handler);
dd3efc09 618 if (r < 0) {
5a8bcb67 619 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601
TG		 620 link_enter_failed(link);
621 return r;
622 }
623
3c9b8860 624 link->link_messages ++;
f882c247
TG		 625 }
626
d4cdbea5
TG		 627 /* now that we can figure out a default address for the dhcp server,
628 start it */
629 if (link_dhcp4_server_enabled(link)) {
630 struct in_addr pool_start;
631 Address *address;
632
633 address = link_find_dhcp_server_address(link);
634 if (!address) {
6a7a4e4d 635 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 636 link_enter_failed(link);
637 return 0;
638 }
639
640 r = sd_dhcp_server_set_address(link->dhcp_server,
641 &address->in_addr.in,
642 address->prefixlen);
643 if (r < 0)
644 return r;
645
646 /* offer 32 addresses starting from the address following the server address */
647 pool_start.s_addr = htobe32(be32toh(address->in_addr.in.s_addr) + 1);
648 r = sd_dhcp_server_set_lease_pool(link->dhcp_server,
649 &pool_start, 32);
650 if (r < 0)
651 return r;
652
653 /* TODO:
654 r = sd_dhcp_server_set_router(link->dhcp_server,
655 &main_address->in_addr.in);
656 if (r < 0)
657 return r;
658
659 r = sd_dhcp_server_set_prefixlen(link->dhcp_server,
660 main_address->prefixlen);
661 if (r < 0)
662 return r;
663 */
664
665 r = sd_dhcp_server_start(link->dhcp_server);
666 if (r < 0) {
6a7a4e4d 667 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 668
669 link_enter_failed(link);
670
671 return 0;
672 }
673
6a7a4e4d 674 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 675 }
676
6a7a4e4d 677 if (link->link_messages == 0)
431ca2ce 678 link_enter_set_routes(link);
6a7a4e4d
LP		 679 else
680 log_link_debug(link, "Setting addresses");
431ca2ce 681
f882c247
TG		 682 return 0;
683}
684
b22d8a00 685int link_address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
5da8149f 686 _cleanup_link_unref_ Link *link = userdata;
ff254138
TG		 687 int r;
688
689 assert(m);
690 assert(link);
691 assert(link->ifname);
692
5da8149f 693 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 694 return 1;
695
696 r = sd_rtnl_message_get_errno(m);
b90b025a 697 if (r < 0 && r != -EADDRNOTAVAIL)
6a7a4e4d 698 log_link_warning_errno(link, r, "%-*s: could not drop address: %m", IFNAMSIZ, link->ifname);
ff254138 699
5bdd314c 700 return 1;
ff254138
TG		 701}
702
a245ced0 703static int link_set_bridge_fdb(Link *const link) {
b98b483b
AR		 704 FdbEntry *fdb_entry;
705 int r = 0;
706
707 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
ea6ec096 708 r = fdb_entry_configure(link, fdb_entry);
b98b483b 709 if(r < 0) {
6a7a4e4d 710 log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
b98b483b
AR		 711 break;
712 }
713 }
714
715 return r;
716}
717
e1853b00
SS		 718static int link_set_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
719 _cleanup_link_unref_ Link *link = userdata;
720 int r;
721
6a7a4e4d 722 log_link_debug(link, "Set link");
e1853b00
SS		 723
724 r = sd_rtnl_message_get_errno(m);
725 if (r < 0 && r != -EEXIST) {
f2341e0a 726 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 727 link_enter_failed(link);
728 return 1;
729 }
730
731 return 0;
732}
733
19070062 734static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
5da8149f 735 _cleanup_link_unref_ Link *link = userdata;
1346b1f0
TG		 736 int r;
737
19070062 738 assert(m);
b226d99b
TG		 739 assert(link);
740
5da8149f 741 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
370e9930 742 return 1;
370e9930 743
1346b1f0 744 r = sd_bus_message_get_errno(m);
70b34f5d 745 if (r > 0)
6a7a4e4d 746 log_link_warning_errno(link, r, "Could not set hostname: %m");
1346b1f0
TG		 747
748 return 1;
749}
750
3c9b8860 751int link_set_hostname(Link *link, const char *hostname) {
1346b1f0
TG		 752 int r = 0;
753
b226d99b
TG		 754 assert(link);
755 assert(link->manager);
1346b1f0
TG		 756 assert(hostname);
757
79008bdd 758 log_link_debug(link, "Setting transient hostname: '%s'", hostname);
1346b1f0 759
3c9b8860
TG		 760 if (!link->manager->bus) {
761 /* TODO: replace by assert when we can rely on kdbus */
6a7a4e4d 762 log_link_info(link, "Not connected to system bus, ignoring transient hostname.");
bcbca829
TG		 763 return 0;
764 }
765
9c34154a 766 r = sd_bus_call_method_async(
b226d99b 767 link->manager->bus,
9c34154a 768 NULL,
1346b1f0
TG		 769 "org.freedesktop.hostname1",
770 "/org/freedesktop/hostname1",
771 "org.freedesktop.hostname1",
9c34154a
UTL		 772 "SetHostname",
773 set_hostname_handler,
774 link,
775 "sb",
776 hostname,
777 false);
1346b1f0 778
6a7a4e4d
LP		 779 if (r < 0)
780 return log_link_error_errno(link, r, "Could not set transient hostname: %m");
b226d99b
TG		 781
782 link_ref(link);
1346b1f0 783
5da8149f 784 return 0;
1346b1f0
TG		 785}
786
4f882b2a 787static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
5da8149f 788 _cleanup_link_unref_ Link *link = userdata;
4f882b2a
TG		 789 int r;
790
791 assert(m);
792 assert(link);
793 assert(link->ifname);
794
5da8149f 795 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 796 return 1;
797
798 r = sd_rtnl_message_get_errno(m);
c9ccc19f 799 if (r < 0)
6a7a4e4d 800 log_link_warning_errno(link, r, "%-*s: could not set MTU: %m", IFNAMSIZ, link->ifname);
4f882b2a
TG		 801
802 return 1;
803}
804
3c9b8860 805int link_set_mtu(Link *link, uint32_t mtu) {
cf6a8911 806 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
4f882b2a
TG		 807 int r;
808
809 assert(link);
810 assert(link->manager);
811 assert(link->manager->rtnl);
812
6a7a4e4d 813 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 814
6a7a4e4d
LP		 815 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
816 if (r < 0)
817 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a
TG		 818
819 r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 820 if (r < 0)
821 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 822
6a7a4e4d
LP		 823 r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
824 if (r < 0)
825 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 826
ae941762 827 link_ref(link);
b226d99b 828
4f882b2a
TG		 829 return 0;
830}
831
e1853b00
SS		 832static int link_set_bridge(Link *link) {
833 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
834 int r;
835
836 assert(link);
837 assert(link->network);
838
839 if(link->network->cost == 0)
840 return 0;
841
6a7a4e4d
LP		 842 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
843 if (r < 0)
844 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 845
846 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 847 if (r < 0)
848 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00
SS		 849
850 r = sd_rtnl_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 851 if (r < 0)
852 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00
SS		 853
854 if(link->network->cost != 0) {
855 r = sd_rtnl_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 856 if (r < 0)
857 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00
SS		 858 }
859
860 r = sd_rtnl_message_close_container(req);
6a7a4e4d
LP		 861 if (r < 0)
862 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00
SS		 863
864 r = sd_rtnl_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 865 if (r < 0)
866 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 867
868 link_ref(link);
869
870 return r;
871}
872
49699bac
SS		 873static void lldp_handler(sd_lldp *lldp, int event, void *userdata) {
874 Link *link = userdata;
875 int r;
876
877 assert(link);
878 assert(link->network);
879 assert(link->manager);
880
881 if (event != UPDATE_INFO)
882 return;
883
884 r = sd_lldp_save(link->lldp, link->lldp_file);
885 if (r < 0)
6a7a4e4d 886 log_link_warning_errno(link, r, "Could not save LLDP: %m");
49699bac
SS		 887
888}
889
ff254138
TG		 890static int link_acquire_conf(Link *link) {
891 int r;
892
893 assert(link);
894 assert(link->network);
ff254138
TG		 895 assert(link->manager);
896 assert(link->manager->event);
897
78c958f8 898 if (link_ipv4ll_enabled(link)) {
eb34d4af 899 assert(link->ipv4ll);
ff254138 900
6a7a4e4d 901 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 902
903 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 904 if (r < 0)
905 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 906 }
907
78c958f8 908 if (link_dhcp4_enabled(link)) {
eb34d4af 909 assert(link->dhcp_client);
ff254138 910
6a7a4e4d 911 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 912
5c1d3fc9 913 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 914 if (r < 0)
915 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 916 }
ff254138 917
78c958f8 918 if (link_dhcp6_enabled(link)) {
4138fb2c
PF		 919 assert(link->icmp6_router_discovery);
920
6a7a4e4d 921 log_link_debug(link, "Discovering IPv6 routers");
4138fb2c
PF		 922
923 r = sd_icmp6_router_solicitation_start(link->icmp6_router_discovery);
6a7a4e4d
LP		 924 if (r < 0)
925 return log_link_warning_errno(link, r, "Could not start IPv6 router discovery: %m");
4138fb2c
PF		 926 }
927
ce43e484
SS		 928 if (link_lldp_enabled(link)) {
929 assert(link->lldp);
930
931 log_link_debug(link, "Starting LLDP");
932
933 r = sd_lldp_start(link->lldp);
6a7a4e4d
LP		 934 if (r < 0)
935 return log_link_warning_errno(link, r, "Could not start LLDP: %m");
ce43e484
SS		 936 }
937
ff254138
TG		 938 return 0;
939}
940
a61bb41c 941bool link_has_carrier(Link *link) {
deb2e523
TG		 942 /* see Documentation/networking/operstates.txt in the kernel sources */
943
a61bb41c 944 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 945 return true;
946
a61bb41c 947 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 948 /* operstate may not be implemented, so fall back to flags */
a61bb41c 949 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 950 return true;
951
952 return false;
953}
954
dd3efc09 955static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
5da8149f 956 _cleanup_link_unref_ Link *link = userdata;
dd3efc09
TG		 957 int r;
958
1746cf2a
TG		 959 assert(link);
960
5da8149f 961 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 962 return 1;
963
dd3efc09 964 r = sd_rtnl_message_get_errno(m);
6a7a4e4d
LP		 965 if (r < 0)
966 /* we warn but don't fail the link, as it may be
967 brought up later */
968 log_link_warning_errno(link, r, "%-*s: could not bring up interface: %m", IFNAMSIZ, link->ifname);
45ad2c13 969
f882c247
TG		 970 return 1;
971}
972
973static int link_up(Link *link) {
cf6a8911 974 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
5c3072ea 975 uint8_t ipv6ll_mode;
f579559b
TG		 976 int r;
977
f882c247 978 assert(link);
c106cc36 979 assert(link->network);
f882c247
TG		 980 assert(link->manager);
981 assert(link->manager->rtnl);
982
6a7a4e4d 983 log_link_debug(link, "Bringing link up");
449f7554 984
6a7a4e4d
LP		 985 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
986 if (r < 0)
987 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 988
5d4795f3 989 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 990 if (r < 0)
991 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 992
c106cc36
TG		 993 if (link->network->mac) {
994 r = sd_rtnl_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 995 if (r < 0)
996 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 997 }
998
999 if (link->network->mtu) {
1000 r = sd_rtnl_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1001 if (r < 0)
1002 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1003 }
1004
7f77697a 1005 r = sd_rtnl_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1006 if (r < 0)
1007 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1008
01d28f81
TG		 1009 if (socket_ipv6_is_supported()) {
1010 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1011 r = sd_rtnl_message_open_container(req, AF_INET6);
1012 if (r < 0)
1013 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1014
01d28f81
TG		 1015 ipv6ll_mode = link_ipv6ll_enabled(link) ? IN6_ADDR_GEN_MODE_EUI64 : IN6_ADDR_GEN_MODE_NONE;
1016 r = sd_rtnl_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1017 if (r < 0)
1018 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1019
01d28f81
TG		 1020 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1021 r = sd_rtnl_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
1022 if (r < 0)
1023 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1024 }
1025
1026 r = sd_rtnl_message_close_container(req);
6a7a4e4d 1027 if (r < 0)
01d28f81 1028 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1029 }
d0d6a4cd 1030
7f77697a 1031 r = sd_rtnl_message_close_container(req);
6a7a4e4d
LP		 1032 if (r < 0)
1033 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1034
6a7a4e4d
LP		 1035 r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1036 if (r < 0)
1037 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1038
b226d99b
TG		 1039 link_ref(link);
1040
f882c247
TG		 1041 return 0;
1042}
1043
0d4ad91d
AR		 1044static int link_down_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
1045 _cleanup_link_unref_ Link *link = userdata;
1046 int r;
1047
1048 assert(link);
1049
1050 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1051 return 1;
1052
1053 r = sd_rtnl_message_get_errno(m);
1054 if (r < 0)
6a7a4e4d 1055 log_link_warning_errno(link, r, "%-*s: could not bring down interface: %m", IFNAMSIZ, link->ifname);
0d4ad91d
AR		 1056
1057 return 1;
1058}
1059
1060static int link_down(Link *link) {
1061 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
1062 int r;
1063
1064 assert(link);
1065 assert(link->manager);
1066 assert(link->manager->rtnl);
1067
6a7a4e4d 1068 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1069
1070 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1071 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1072 if (r < 0)
1073 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1074
1075 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1076 if (r < 0)
1077 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1078
6a7a4e4d
LP		 1079 r = sd_rtnl_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
1080 if (r < 0)
1081 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1082
1083 link_ref(link);
1084
1085 return 0;
1086}
1087
1088static int link_handle_bound_to_list(Link *link) {
1089 Link *l;
1090 Iterator i;
1091 int r;
1092 bool required_up = false;
1093 bool link_is_up = false;
1094
1095 assert(link);
1096
1097 if (hashmap_isempty(link->bound_to_links))
1098 return 0;
1099
1100 if (link->flags & IFF_UP)
1101 link_is_up = true;
1102
1103 HASHMAP_FOREACH (l, link->bound_to_links, i)
1104 if (link_has_carrier(l)) {
1105 required_up = true;
1106 break;
1107 }
1108
1109 if (!required_up && link_is_up) {
1110 r = link_down(link);
1111 if (r < 0)
1112 return r;
1113 } else if (required_up && !link_is_up) {
1114 r = link_up(link);
1115 if (r < 0)
1116 return r;
1117 }
1118
1119 return 0;
1120}
1121
1122static int link_handle_bound_by_list(Link *link) {
1123 Iterator i;
1124 Link *l;
1125 int r;
1126
1127 assert(link);
1128
1129 if (hashmap_isempty(link->bound_by_links))
1130 return 0;
1131
1132 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1133 r = link_handle_bound_to_list(l);
1134 if (r < 0)
1135 return r;
1136 }
1137
1138 return 0;
1139}
1140
1141static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1142 int r;
1143
1144 assert(link);
1145 assert(carrier);
1146
1147 if (link == carrier)
1148 return 0;
1149
1150 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1151 return 0;
1152
1153 r = hashmap_ensure_allocated(h, NULL);
1154 if (r < 0)
1155 return r;
1156
1157 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1158 if (r < 0)
1159 return r;
1160
1161 return 0;
1162}
1163
1164static int link_new_bound_by_list(Link *link) {
1165 Manager *m;
1166 Link *carrier;
1167 Iterator i;
1168 int r;
1169 bool list_updated = false;
1170
1171 assert(link);
1172 assert(link->manager);
1173
1174 m = link->manager;
1175
1176 HASHMAP_FOREACH (carrier, m->links, i) {
1177 if (!carrier->network)
1178 continue;
1179
1180 if (strv_isempty(carrier->network->bind_carrier))
1181 continue;
1182
1183 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1184 r = link_put_carrier(link, carrier, &link->bound_by_links);
1185 if (r < 0)
1186 return r;
1187
1188 list_updated = true;
1189 }
1190 }
1191
1192 if (list_updated)
1193 link_save(link);
1194
1195 HASHMAP_FOREACH (carrier, link->bound_by_links, i) {
1196 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1197 if (r < 0)
1198 return r;
1199
1200 link_save(carrier);
1201 }
1202
1203 return 0;
1204}
1205
1206static int link_new_bound_to_list(Link *link) {
1207 Manager *m;
1208 Link *carrier;
1209 Iterator i;
1210 int r;
1211 bool list_updated = false;
1212
1213 assert(link);
1214 assert(link->manager);
1215
1216 if (!link->network)
1217 return 0;
1218
1219 if (strv_isempty(link->network->bind_carrier))
1220 return 0;
1221
1222 m = link->manager;
1223
1224 HASHMAP_FOREACH (carrier, m->links, i) {
1225 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1226 r = link_put_carrier(link, carrier, &link->bound_to_links);
1227 if (r < 0)
1228 return r;
1229
1230 list_updated = true;
1231 }
1232 }
1233
1234 if (list_updated)
1235 link_save(link);
1236
1237 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1238 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1239 if (r < 0)
1240 return r;
1241
1242 link_save(carrier);
1243 }
1244
1245 return 0;
1246}
1247
1248static int link_new_carrier_maps(Link *link) {
1249 int r;
1250
1251 r = link_new_bound_by_list(link);
1252 if (r < 0)
1253 return r;
1254
1255 r = link_handle_bound_by_list(link);
1256 if (r < 0)
1257 return r;
1258
1259 r = link_new_bound_to_list(link);
1260 if (r < 0)
1261 return r;
1262
1263 r = link_handle_bound_to_list(link);
1264 if (r < 0)
1265 return r;
1266
1267 return 0;
1268}
1269
1270static void link_free_bound_to_list(Link *link) {
1271 Link *bound_to;
1272 Iterator i;
1273
1274 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1275 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1276
1277 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
1278 link_save(bound_to);
1279 }
1280
1281 return;
1282}
1283
1284static void link_free_bound_by_list(Link *link) {
1285 Link *bound_by;
1286 Iterator i;
1287
1288 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1289 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1290
1291 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
1292 link_save(bound_by);
1293 link_handle_bound_to_list(bound_by);
1294 }
1295 }
1296
1297 return;
1298}
1299
1300static void link_free_carrier_maps(Link *link) {
1301 bool list_updated = false;
1302
1303 assert(link);
1304
1305 if (!hashmap_isempty(link->bound_to_links)) {
1306 link_free_bound_to_list(link);
1307 list_updated = true;
1308 }
1309
1310 if (!hashmap_isempty(link->bound_by_links)) {
1311 link_free_bound_by_list(link);
1312 list_updated = true;
1313 }
1314
1315 if (list_updated)
1316 link_save(link);
1317
1318 return;
1319}
1320
1321void link_drop(Link *link) {
1322 if (!link || link->state == LINK_STATE_LINGER)
1323 return;
1324
1325 link_set_state(link, LINK_STATE_LINGER);
1326
1327 link_free_carrier_maps(link);
1328
6a7a4e4d 1329 log_link_debug(link, "Link removed");
0d4ad91d
AR		 1330
1331 link_unref(link);
1332
1333 return;
1334}
1335
3f265037 1336static int link_joined(Link *link) {
f882c247
TG		 1337 int r;
1338
ef1ba606 1339 assert(link);
f5be5601 1340 assert(link->network);
dd3efc09 1341
0d4ad91d
AR		 1342 if (!hashmap_isempty(link->bound_to_links)) {
1343 r = link_handle_bound_to_list(link);
1344 if (r < 0)
1345 return r;
1346 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1347 r = link_up(link);
1348 if (r < 0) {
1349 link_enter_failed(link);
1350 return r;
1351 }
ef1ba606 1352 }
f882c247 1353
e1853b00
SS		 1354 if(link->network->bridge) {
1355 r = link_set_bridge(link);
6a7a4e4d
LP		 1356 if (r < 0)
1357 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 1358 }
1359
fb6730c4 1360 return link_enter_set_addresses(link);
02b59d57
TG		 1361}
1362
3c9b8860
TG		 1363static int netdev_join_handler(sd_rtnl *rtnl, sd_rtnl_message *m,
1364 void *userdata) {
5da8149f 1365 _cleanup_link_unref_ Link *link = userdata;
02b59d57
TG		 1366 int r;
1367
1746cf2a 1368 assert(link);
ef1ba606 1369 assert(link->network);
02b59d57 1370
52433f6b
TG		 1371 link->enslaving --;
1372
5da8149f 1373 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1374 return 1;
1375
1376 r = sd_rtnl_message_get_errno(m);
856f962c 1377 if (r < 0 && r != -EEXIST) {
6a7a4e4d 1378 log_link_error_errno(link, r, "%-*s: could not join netdev: %m", IFNAMSIZ, link->ifname);
ef1ba606
TG		 1379 link_enter_failed(link);
1380 return 1;
ba179154 1381 } else
6a7a4e4d 1382 log_link_debug(link, "Joined netdev");
02b59d57 1383
856f962c 1384 if (link->enslaving <= 0)
3f265037 1385 link_joined(link);
02b59d57
TG		 1386
1387 return 1;
1388}
1389
3f265037 1390static int link_enter_join_netdev(Link *link) {
6a0a2f86 1391 NetDev *netdev;
672682a6 1392 Iterator i;
02b59d57
TG		 1393 int r;
1394
1395 assert(link);
1396 assert(link->network);
8434fd5c 1397 assert(link->state == LINK_STATE_PENDING);
02b59d57 1398
e331e246 1399 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 1400
fe8db0c5
TG		 1401 link_save(link);
1402
7951dea2
SS		 1403 if (!link->network->bridge &&
1404 !link->network->bond &&
6a0a2f86 1405 hashmap_isempty(link->network->stacked_netdevs))
3f265037 1406 return link_joined(link);
02b59d57 1407
d9c67ea1 1408 if (link->network->bond) {
f2341e0a
LP		 1409 log_struct(LOG_DEBUG,
1410 LOG_LINK_INTERFACE(link),
1411 LOG_NETDEV_INTERFACE(link->network->bond),
1412 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
1413 NULL);
1414
1415 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1416 if (r < 0) {
f2341e0a
LP		 1417 log_struct_errno(LOG_WARNING, r,
1418 LOG_LINK_INTERFACE(link),
1419 LOG_NETDEV_INTERFACE(link->network->bond),
1420 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
1421 NULL);
1422
52433f6b
TG		 1423 link_enter_failed(link);
1424 return r;
1425 }
1426
0ad6148e
MO		 1427 link->enslaving ++;
1428 }
1429
d9c67ea1 1430 if (link->network->bridge) {
f2341e0a
LP		 1431 log_struct(LOG_DEBUG,
1432 LOG_LINK_INTERFACE(link),
1433 LOG_NETDEV_INTERFACE(link->network->bridge),
1434 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
1435 NULL);
1436
1437 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1438 if (r < 0) {
f2341e0a
LP		 1439 log_struct_errno(LOG_WARNING, r,
1440 LOG_LINK_INTERFACE(link),
1441 LOG_NETDEV_INTERFACE(link->network->bridge),
1442 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
1443 NULL),
0ad6148e
MO		 1444 link_enter_failed(link);
1445 return r;
1446 }
1447
52433f6b
TG		 1448 link->enslaving ++;
1449 }
1450
6a0a2f86 1451 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 1452
f2341e0a
LP		 1453 log_struct(LOG_DEBUG,
1454 LOG_LINK_INTERFACE(link),
1455 LOG_NETDEV_INTERFACE(netdev),
1456 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
1457 NULL);
1458
1459 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1460 if (r < 0) {
f2341e0a
LP		 1461 log_struct_errno(LOG_WARNING, r,
1462 LOG_LINK_INTERFACE(link),
1463 LOG_NETDEV_INTERFACE(netdev),
1464 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
1465 NULL);
326cb406
SS		 1466 link_enter_failed(link);
1467 return r;
1468 }
1469
326cb406
SS		 1470 link->enslaving ++;
1471 }
1472
ef1ba606
TG		 1473 return 0;
1474}
1475
769d324c 1476static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 1477 const char *p = NULL;
1478 int r;
1479
8add5f79
NO		 1480 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
1481 return 0;
1482
63c372cb 1483 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/forwarding");
505c5f6d 1484 r = write_string_file_no_create(p, one_zero(link_ipv4_forward_enabled(link)));
5a8bcb67 1485 if (r < 0)
43c6d5ab
LP		 1486 log_link_warning_errno(link, r, "Cannot configure IPv4 forwarding for interface %s: %m", link->ifname);
1487
769d324c
LP		 1488 return 0;
1489}
1490
1491static int link_set_ipv6_forward(Link *link) {
1492 const char *p = NULL;
1493 int r;
1494
fe027299
LP		 1495 /* Make this a NOP if IPv6 is not available */
1496 if (!socket_ipv6_is_supported())
1497 return 0;
1498
8add5f79
NO		 1499 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
1500 return 0;
1501
63c372cb 1502 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/forwarding");
769d324c
LP		 1503 r = write_string_file_no_create(p, one_zero(link_ipv6_forward_enabled(link)));
1504 if (r < 0)
1505 log_link_warning_errno(link, r, "Cannot configure IPv6 forwarding for interface: %m");
5a8bcb67
LP		 1506
1507 return 0;
1508}
1509
a748b692 1510static int link_configure(Link *link) {
02b59d57
TG		 1511 int r;
1512
ef1ba606 1513 assert(link);
b22d8a00 1514 assert(link->network);
8434fd5c 1515 assert(link->state == LINK_STATE_PENDING);
a748b692 1516
b98b483b
AR		 1517 r = link_set_bridge_fdb(link);
1518 if (r < 0)
1519 return r;
1520
769d324c
LP		 1521 r = link_set_ipv4_forward(link);
1522 if (r < 0)
1523 return r;
1524
1525 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 1526 if (r < 0)
1527 return r;
1528
78c958f8 1529 if (link_ipv4ll_enabled(link)) {
b22d8a00 1530 r = ipv4ll_configure(link);
eb34d4af
TG		 1531 if (r < 0)
1532 return r;
1533 }
1534
78c958f8 1535 if (link_dhcp4_enabled(link)) {
3c9b8860 1536 r = dhcp4_configure(link);
eb34d4af
TG		 1537 if (r < 0)
1538 return r;
eb34d4af
TG		 1539 }
1540
78c958f8 1541 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 1542 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
1543 if (r < 0)
1544 return r;
1545
1546 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
1547 if (r < 0)
1548 return r;
dd43110f
TG		 1549 }
1550
78c958f8 1551 if (link_dhcp6_enabled(link)) {
5c79bd79 1552 r = icmp6_configure(link);
4138fb2c
PF		 1553 if (r < 0)
1554 return r;
1555 }
1556
ce43e484
SS		 1557 if (link_lldp_enabled(link)) {
1558 r = sd_lldp_new(link->ifindex, link->ifname, &link->mac, &link->lldp);
1559 if (r < 0)
1560 return r;
1561
1562 r = sd_lldp_attach_event(link->lldp, NULL, 0);
1563 if (r < 0)
1564 return r;
49699bac
SS		 1565
1566 r = sd_lldp_set_callback(link->lldp,
1567 lldp_handler, link);
1568 if (r < 0)
1569 return r;
ce43e484
SS		 1570 }
1571
a61bb41c 1572 if (link_has_carrier(link)) {
1e9be60b
TG		 1573 r = link_acquire_conf(link);
1574 if (r < 0)
1575 return r;
cc544d5f 1576 }
1e9be60b 1577
3f265037 1578 return link_enter_join_netdev(link);
505f8da7
TG		 1579}
1580
3c9b8860
TG		 1581static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m,
1582 void *userdata) {
5da8149f 1583 _cleanup_link_unref_ Link *link = userdata;
505f8da7 1584 Network *network;
505f8da7
TG		 1585 int r;
1586
1587 assert(link);
1588 assert(link->ifname);
1589 assert(link->manager);
1590
8434fd5c 1591 if (link->state != LINK_STATE_PENDING)
5da8149f 1592 return 1;
505f8da7 1593
6a7a4e4d 1594 log_link_debug(link, "Link state is up-to-date");
505f8da7 1595
0d4ad91d
AR		 1596 r = link_new_bound_by_list(link);
1597 if (r < 0)
1598 return r;
1599
1600 r = link_handle_bound_by_list(link);
1601 if (r < 0)
1602 return r;
1603
3c9b8860
TG		 1604 r = network_get(link->manager, link->udev_device, link->ifname,
1605 &link->mac, &network);
57bd6899
TG		 1606 if (r == -ENOENT) {
1607 link_enter_unmanaged(link);
5da8149f 1608 return 1;
57bd6899
TG		 1609 } else if (r < 0)
1610 return r;
505f8da7 1611
bd2efe92 1612 if (link->flags & IFF_LOOPBACK) {
d0d6a4cd 1613 if (network->link_local != ADDRESS_FAMILY_NO)
6a7a4e4d 1614 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 1615
cb9fc36a 1616 if (network->dhcp != ADDRESS_FAMILY_NO)
6a7a4e4d 1617 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8
TG		 1618
1619 if (network->dhcp_server)
6a7a4e4d 1620 log_link_debug(link, "Ignoring DHCP server for loopback link");
bd2efe92
TG		 1621 }
1622
505f8da7
TG		 1623 r = network_apply(link->manager, network, link);
1624 if (r < 0)
1625 return r;
1626
0d4ad91d
AR		 1627 r = link_new_bound_to_list(link);
1628 if (r < 0)
1629 return r;
1630
a748b692
TG		 1631 r = link_configure(link);
1632 if (r < 0)
1633 return r;
1634
5da8149f 1635 return 1;
505f8da7
TG		 1636}
1637
4f561e8e
TG		 1638int link_initialized(Link *link, struct udev_device *device) {
1639 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
1640 int r;
1641
1642 assert(link);
1643 assert(link->manager);
1644 assert(link->manager->rtnl);
1645 assert(device);
1646
8434fd5c 1647 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 1648 return 0;
1649
679b3605
TG		 1650 if (link->udev_device)
1651 return 0;
1652
79008bdd 1653 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 1654
1655 link->udev_device = udev_device_ref(device);
1656
3c9b8860
TG		 1657 /* udev has initialized the link, but we don't know if we have yet
1658 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1659 * when it returns we know that the pending NEWLINKs have already been
1660 * processed and that we are up-to-date */
4f561e8e 1661
3c9b8860
TG		 1662 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
1663 link->ifindex);
4f561e8e
TG		 1664 if (r < 0)
1665 return r;
1666
3c9b8860
TG		 1667 r = sd_rtnl_call_async(link->manager->rtnl, req,
1668 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 1669 if (r < 0)
1670 return r;
1671
5da8149f
TG		 1672 link_ref(link);
1673
4f561e8e
TG		 1674 return 0;
1675}
1676
5a8bcb67
LP		 1677static Address* link_get_equal_address(Link *link, Address *needle) {
1678 Address *i;
1679
1680 assert(link);
1681 assert(needle);
1682
1683 LIST_FOREACH(addresses, i, link->addresses)
1684 if (address_equal(i, needle))
1685 return i;
1686
1687 return NULL;
1688}
1689
45af44d4 1690int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
fbbeb65a
TG		 1691 Manager *m = userdata;
1692 Link *link = NULL;
1693 uint16_t type;
1694 _cleanup_address_free_ Address *address = NULL;
851c9f82 1695 unsigned char flags;
5a8bcb67
LP		 1696 Address *existing;
1697 char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX];
c6d3b303 1698 const char *valid_str = NULL;
fbbeb65a
TG		 1699 int r, ifindex;
1700
1701 assert(rtnl);
1702 assert(message);
1703 assert(m);
1704
45af44d4
TG		 1705 if (sd_rtnl_message_is_error(message)) {
1706 r = sd_rtnl_message_get_errno(message);
1707 if (r < 0)
1708 log_warning_errno(r, "rtnl: failed to receive address: %m");
1709
1710 return 0;
1711 }
1712
fbbeb65a
TG		 1713 r = sd_rtnl_message_get_type(message, &type);
1714 if (r < 0) {
6a7a4e4d 1715 log_warning_errno(r, "rtnl: could not get message type: %m");
fbbeb65a 1716 return 0;
cdfee943
TG		 1717 } else if (type != RTM_NEWADDR && type != RTM_DELADDR) {
1718 log_warning("rtnl: received unexpected message type when processing address");
1719 return 0;
fbbeb65a
TG		 1720 }
1721
1722 r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
45af44d4 1723 if (r < 0) {
cdfee943 1724 log_warning_errno(r, "rtnl: could not get ifindex from address: %m");
45af44d4
TG		 1725 return 0;
1726 } else if (ifindex <= 0) {
1727 log_warning("rtnl: received address message with invalid ifindex: %d", ifindex);
fbbeb65a
TG		 1728 return 0;
1729 } else {
1730 r = link_get(m, ifindex, &link);
1731 if (r < 0 || !link) {
6a24f148
TG		 1732 /* when enumerating we might be out of sync, but we will
1733 * get the address again, so just ignore it */
1734 if (!m->enumerating)
1735 log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex);
fbbeb65a
TG		 1736 return 0;
1737 }
1738 }
1739
1740 r = address_new_dynamic(&address);
1741 if (r < 0)
393c0c5e 1742 return r;
fbbeb65a
TG		 1743
1744 r = sd_rtnl_message_addr_get_family(message, &address->family);
1745 if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) {
6a7a4e4d 1746 log_link_warning(link, "rtnl: received address with invalid family, ignoring.");
fbbeb65a
TG		 1747 return 0;
1748 }
1749
1750 r = sd_rtnl_message_addr_get_prefixlen(message, &address->prefixlen);
1751 if (r < 0) {
6a7a4e4d 1752 log_link_warning_errno(link, r, "rtnl: received address with invalid prefixlen, ignoring: %m");
e375dcde
TG		 1753 return 0;
1754 }
1755
1756 r = sd_rtnl_message_addr_get_scope(message, &address->scope);
1757 if (r < 0) {
6a7a4e4d 1758 log_link_warning_errno(link, r, "rtnl: received address with invalid scope, ignoring: %m");
fbbeb65a
TG		 1759 return 0;
1760 }
1761
851c9f82 1762 r = sd_rtnl_message_addr_get_flags(message, &flags);
81163121 1763 if (r < 0) {
6a7a4e4d 1764 log_link_warning_errno(link, r, "rtnl: received address with invalid flags, ignoring: %m");
81163121
TG		 1765 return 0;
1766 }
851c9f82 1767 address->flags = flags;
81163121 1768
fbbeb65a
TG		 1769 switch (address->family) {
1770 case AF_INET:
5a8bcb67 1771 r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL, &address->in_addr.in);
fbbeb65a 1772 if (r < 0) {
6a7a4e4d 1773 log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
fbbeb65a
TG		 1774 return 0;
1775 }
1776
1777 break;
1778
1779 case AF_INET6:
5a8bcb67 1780 r = sd_rtnl_message_read_in6_addr(message, IFA_ADDRESS, &address->in_addr.in6);
fbbeb65a 1781 if (r < 0) {
6a7a4e4d 1782 log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
fbbeb65a
TG		 1783 return 0;
1784 }
1785
1786 break;
1787
1788 default:
1789 assert_not_reached("invalid address family");
1790 }
1791
5a8bcb67 1792 if (!inet_ntop(address->family, &address->in_addr, buf, INET6_ADDRSTRLEN)) {
6a7a4e4d 1793 log_link_warning(link, "Could not print address");
fbbeb65a
TG		 1794 return 0;
1795 }
1796
5a8bcb67 1797 r = sd_rtnl_message_read_cache_info(message, IFA_CACHEINFO, &address->cinfo);
c6d3b303
TG		 1798 if (r >= 0) {
1799 if (address->cinfo.ifa_valid == CACHE_INFO_INFINITY_LIFE_TIME)
1800 valid_str = "ever";
1801 else
1802 valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
1803 address->cinfo.ifa_valid * USEC_PER_SEC,
1804 USEC_PER_SEC);
1805 }
1806
5a8bcb67
LP		 1807 existing = link_get_equal_address(link, address);
1808
1809 switch (type) {
1810 case RTM_NEWADDR:
1811 if (existing) {
1812 log_link_debug(link, "Updating address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
428fd0a7 1813
428fd0a7 1814
5a8bcb67
LP		 1815 existing->scope = address->scope;
1816 existing->flags = address->flags;
1817 existing->cinfo = address->cinfo;
428fd0a7 1818
5a8bcb67
LP		 1819 } else {
1820 log_link_debug(link, "Adding address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
428fd0a7 1821
5a8bcb67
LP		 1822 LIST_PREPEND(addresses, link->addresses, address);
1823 address_establish(address, link);
fbbeb65a 1824
5a8bcb67 1825 address = NULL;
428fd0a7 1826
5a8bcb67
LP		 1827 link_save(link);
1828 }
f5602be9 1829
428fd0a7 1830 break;
5a8bcb67 1831
fbbeb65a 1832 case RTM_DELADDR:
428fd0a7 1833
5a8bcb67
LP		 1834 if (existing) {
1835 log_link_debug(link, "Removing address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
1836 address_release(existing, link);
1837 LIST_REMOVE(addresses, link->addresses, existing);
1838 address_free(existing);
393c0c5e 1839 } else
5a8bcb67 1840 log_link_warning(link, "Removing non-existent address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
f5602be9 1841
fbbeb65a
TG		 1842 break;
1843 default:
1844 assert_not_reached("Received invalid RTNL message type");
1845 }
1846
1847 return 1;
1848}
1849
505f8da7
TG		 1850int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
1851 Link *link;
1852 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
1853 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
1854 int r;
1855
1856 assert(m);
fbbeb65a 1857 assert(m->rtnl);
505f8da7
TG		 1858 assert(message);
1859 assert(ret);
1860
1861 r = link_new(m, message, ret);
1862 if (r < 0)
1863 return r;
1864
1865 link = *ret;
1866
6a7a4e4d 1867 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7
TG		 1868
1869 if (detect_container(NULL) <= 0) {
1870 /* not in a container, udev will be around */
ae06ab10 1871 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 1872 device = udev_device_new_from_device_id(m->udev, ifindex_str);
6a7a4e4d
LP		 1873 if (!device)
1874 return log_link_warning_errno(link, errno, "Could not find udev device: %m");
505f8da7 1875
3c4cb064 1876 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 1877 /* not yet ready */
79008bdd 1878 log_link_debug(link, "link pending udev initialization...");
505f8da7 1879 return 0;
3c4cb064 1880 }
505f8da7 1881
4f561e8e
TG		 1882 r = link_initialized(link, device);
1883 if (r < 0)
1884 return r;
1885 } else {
5da8149f
TG		 1886 /* we are calling a callback directly, so must take a ref */
1887 link_ref(link);
1888
4f561e8e
TG		 1889 r = link_initialized_and_synced(m->rtnl, NULL, link);
1890 if (r < 0)
1891 return r;
1892 }
505f8da7 1893
a748b692
TG		 1894 return 0;
1895}
1896
9c0a72f9
TG		 1897static int link_carrier_gained(Link *link) {
1898 int r;
1899
1900 assert(link);
1901
1902 if (link->network) {
1903 r = link_acquire_conf(link);
1904 if (r < 0) {
1905 link_enter_failed(link);
1906 return r;
1907 }
1908 }
1909
0d4ad91d
AR		 1910 r = link_handle_bound_by_list(link);
1911 if (r < 0)
1912 return r;
1913
9c0a72f9
TG		 1914 return 0;
1915}
1916
1917static int link_carrier_lost(Link *link) {
1918 int r;
1919
1920 assert(link);
1921
1922 r = link_stop_clients(link);
1923 if (r < 0) {
1924 link_enter_failed(link);
1925 return r;
1926 }
1927
0d4ad91d
AR		 1928 r = link_handle_bound_by_list(link);
1929 if (r < 0)
1930 return r;
1931
9c0a72f9
TG		 1932 return 0;
1933}
1934
1935int link_carrier_reset(Link *link) {
1936 int r;
1937
1938 assert(link);
1939
1940 if (link_has_carrier(link)) {
1941 r = link_carrier_lost(link);
1942 if (r < 0)
1943 return r;
1944
1945 r = link_carrier_gained(link);
1946 if (r < 0)
1947 return r;
1948
6a7a4e4d 1949 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 1950 }
1951
1952 return 0;
1953}
1954
1955
22936833 1956int link_update(Link *link, sd_rtnl_message *m) {
c49b33ac 1957 struct ether_addr mac;
ca4e095a 1958 const char *ifname;
afe7fd56 1959 uint32_t mtu;
a61bb41c 1960 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 1961 int r;
1962
dd3efc09 1963 assert(link);
b8941f74 1964 assert(link->ifname);
22936833
TG		 1965 assert(m);
1966
7619683b
TG		 1967 if (link->state == LINK_STATE_LINGER) {
1968 link_ref(link);
6a7a4e4d 1969 log_link_info(link, "Link readded");
e331e246 1970 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 1971
1972 r = link_new_carrier_maps(link);
1973 if (r < 0)
1974 return r;
7619683b
TG		 1975 }
1976
b8941f74
TG		 1977 r = sd_rtnl_message_read_string(m, IFLA_IFNAME, &ifname);
1978 if (r >= 0 && !streq(ifname, link->ifname)) {
6a7a4e4d 1979 log_link_info(link, "Renamed to %s", ifname);
b8941f74 1980
0d4ad91d
AR		 1981 link_free_carrier_maps(link);
1982
b8941f74
TG		 1983 free(link->ifname);
1984 link->ifname = strdup(ifname);
1985 if (!link->ifname)
1986 return -ENOMEM;
0d4ad91d
AR		 1987
1988 r = link_new_carrier_maps(link);
1989 if (r < 0)
1990 return r;
b8941f74
TG		 1991 }
1992
afe7fd56
TG		 1993 r = sd_rtnl_message_read_u32(m, IFLA_MTU, &mtu);
1994 if (r >= 0 && mtu > 0) {
1995 link->mtu = mtu;
1996 if (!link->original_mtu) {
1997 link->original_mtu = mtu;
6a7a4e4d 1998 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 1999 }
2000
2001 if (link->dhcp_client) {
3c9b8860
TG		 2002 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2003 link->mtu);
afe7fd56 2004 if (r < 0) {
6a7a4e4d 2005 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 2006 return r;
2007 }
2008 }
9842de0d 2009 }
69629de9 2010
e9189a1f
TG		 2011 /* The kernel may broadcast NEWLINK messages without the MAC address
2012 set, simply ignore them. */
c49b33ac 2013 r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 2014 if (r >= 0) {
3c9b8860
TG		 2015 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
2016 ETH_ALEN)) {
c49b33ac 2017
3c9b8860
TG		 2018 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
2019 ETH_ALEN);
c49b33ac 2020
79008bdd 2021 log_link_debug(link, "MAC address: "
20861203
TG		 2022 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
2023 mac.ether_addr_octet[0],
2024 mac.ether_addr_octet[1],
2025 mac.ether_addr_octet[2],
2026 mac.ether_addr_octet[3],
2027 mac.ether_addr_octet[4],
2028 mac.ether_addr_octet[5]);
c49b33ac 2029
20861203
TG		 2030 if (link->ipv4ll) {
2031 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 2032 if (r < 0)
2033 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 2034 }
c49b33ac 2035
20861203 2036 if (link->dhcp_client) {
3c9b8860 2037 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 2038 (const uint8_t *) &link->mac,
2039 sizeof (link->mac),
2040 ARPHRD_ETHER);
6a7a4e4d
LP		 2041 if (r < 0)
2042 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
c49b33ac 2043 }
4138fb2c
PF		 2044
2045 if (link->dhcp6_client) {
2046 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 2047 (const uint8_t *) &link->mac,
2048 sizeof (link->mac),
2049 ARPHRD_ETHER);
6a7a4e4d
LP		 2050 if (r < 0)
2051 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
4138fb2c 2052 }
c49b33ac 2053 }
4f882b2a
TG		 2054 }
2055
a61bb41c
TG		 2056 had_carrier = link_has_carrier(link);
2057
2058 r = link_update_flags(link, m);
2059 if (r < 0)
2060 return r;
2061
2062 carrier_gained = !had_carrier && link_has_carrier(link);
2063 carrier_lost = had_carrier && !link_has_carrier(link);
2064
2065 if (carrier_gained) {
6a7a4e4d 2066 log_link_info(link, "Gained carrier");
a61bb41c 2067
9c0a72f9
TG		 2068 r = link_carrier_gained(link);
2069 if (r < 0)
2070 return r;
a61bb41c 2071 } else if (carrier_lost) {
6a7a4e4d 2072 log_link_info(link, "Lost carrier");
a61bb41c 2073
9c0a72f9
TG		 2074 r = link_carrier_lost(link);
2075 if (r < 0)
a61bb41c 2076 return r;
9c0a72f9 2077
a61bb41c
TG		 2078 }
2079
2080 return 0;
dd3efc09 2081}
fe8db0c5 2082
e375dcde 2083static void link_update_operstate(Link *link) {
e331e246 2084 LinkOperationalState operstate;
e375dcde
TG		 2085 assert(link);
2086
2087 if (link->kernel_operstate == IF_OPER_DORMANT)
e331e246 2088 operstate = LINK_OPERSTATE_DORMANT;
a61bb41c 2089 else if (link_has_carrier(link)) {
e375dcde
TG		 2090 Address *address;
2091 uint8_t scope = RT_SCOPE_NOWHERE;
2092
2093 /* if we have carrier, check what addresses we have */
2094 LIST_FOREACH(addresses, address, link->addresses) {
81163121
TG		 2095 if (address->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED))
2096 continue;
2097
e375dcde
TG		 2098 if (address->scope < scope)
2099 scope = address->scope;
2100 }
2101
2102 if (scope < RT_SCOPE_SITE)
2103 /* universally accessible addresses found */
e331e246 2104 operstate = LINK_OPERSTATE_ROUTABLE;
e375dcde
TG		 2105 else if (scope < RT_SCOPE_HOST)
2106 /* only link or site local addresses found */
e331e246 2107 operstate = LINK_OPERSTATE_DEGRADED;
e375dcde
TG		 2108 else
2109 /* no useful addresses found */
e331e246 2110 operstate = LINK_OPERSTATE_CARRIER;
54cba0b1 2111 } else if (link->flags & IFF_UP)
e331e246 2112 operstate = LINK_OPERSTATE_NO_CARRIER;
54cba0b1 2113 else
e331e246
TG		 2114 operstate = LINK_OPERSTATE_OFF;
2115
2116 if (link->operstate != operstate) {
2117 link->operstate = operstate;
2118 link_send_changed(link, "OperationalState", NULL);
2119 }
e375dcde
TG		 2120}
2121
fe8db0c5 2122int link_save(Link *link) {
68a8723c 2123 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 2124 _cleanup_fclose_ FILE *f = NULL;
e375dcde 2125 const char *admin_state, *oper_state;
fe8db0c5
TG		 2126 int r;
2127
2128 assert(link);
2129 assert(link->state_file);
68a8723c 2130 assert(link->lease_file);
bbf7c048
TG		 2131 assert(link->manager);
2132
e375dcde
TG		 2133 link_update_operstate(link);
2134
bbf7c048
TG		 2135 r = manager_save(link->manager);
2136 if (r < 0)
2137 return r;
fe8db0c5 2138
370e9930
TG		 2139 if (link->state == LINK_STATE_LINGER) {
2140 unlink(link->state_file);
2141 return 0;
2142 }
2143
deb2e523
TG		 2144 admin_state = link_state_to_string(link->state);
2145 assert(admin_state);
2146
e375dcde
TG		 2147 oper_state = link_operstate_to_string(link->operstate);
2148 assert(oper_state);
deb2e523 2149
fe8db0c5
TG		 2150 r = fopen_temporary(link->state_file, &f, &temp_path);
2151 if (r < 0)
6a7a4e4d 2152 goto fail;
fe8db0c5
TG		 2153
2154 fchmod(fileno(f), 0644);
2155
2156 fprintf(f,
2157 "# This is private data. Do not parse.\n"
deb2e523 2158 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 2159 "OPER_STATE=%s\n",
2160 admin_state, oper_state);
fe8db0c5 2161
bcb7a07e 2162 if (link->network) {
ea352b40
LP		 2163 char **address, **domain;
2164 bool space;
b0e39c82 2165
adc5b2e2
TG		 2166 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2167
b0e39c82 2168 fputs("DNS=", f);
ea352b40
LP		 2169 space = false;
2170 STRV_FOREACH(address, link->network->dns) {
2171 if (space)
2172 fputc(' ', f);
2173 fputs(*address, f);
2174 space = true;
2175 }
d5314fff 2176
b0e39c82
TG		 2177 if (link->network->dhcp_dns &&
2178 link->dhcp_lease) {
2179 const struct in_addr *addresses;
2180
2181 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
2182 if (r > 0) {
ea352b40
LP		 2183 if (space)
2184 fputc(' ', f);
b0e39c82 2185 serialize_in_addrs(f, addresses, r);
b0e39c82
TG		 2186 }
2187 }
2188
b0e39c82
TG		 2189 fputs("\n", f);
2190
2191 fprintf(f, "NTP=");
ea352b40
LP		 2192 space = false;
2193 STRV_FOREACH(address, link->network->ntp) {
2194 if (space)
2195 fputc(' ', f);
2196 fputs(*address, f);
2197 space = true;
2198 }
d5314fff 2199
b0e39c82
TG		 2200 if (link->network->dhcp_ntp &&
2201 link->dhcp_lease) {
2202 const struct in_addr *addresses;
2203
2204 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
2205 if (r > 0) {
ea352b40
LP		 2206 if (space)
2207 fputc(' ', f);
b0e39c82 2208 serialize_in_addrs(f, addresses, r);
b0e39c82
TG		 2209 }
2210 }
2211
b0e39c82 2212 fputs("\n", f);
bd8f6538 2213
6192b846 2214 fprintf(f, "DOMAINS=");
ea352b40
LP		 2215 space = false;
2216 STRV_FOREACH(domain, link->network->domains) {
2217 if (space)
2218 fputc(' ', f);
2219 fputs(*domain, f);
2220 space = true;
2221 }
d5314fff 2222
ad0734e8 2223 if (link->network->dhcp_domains &&
9b4d1882
TG		 2224 link->dhcp_lease) {
2225 const char *domainname;
2226
2227 r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
6192b846 2228 if (r >= 0) {
ea352b40
LP		 2229 if (space)
2230 fputc(' ', f);
6192b846 2231 fputs(domainname, f);
6192b846 2232 }
9b4d1882
TG		 2233 }
2234
6192b846
TG		 2235 fputs("\n", f);
2236
67272d15
TG		 2237 fprintf(f, "WILDCARD_DOMAIN=%s\n",
2238 yes_no(link->network->wildcard_domain));
2239
3c9b8860
TG		 2240 fprintf(f, "LLMNR=%s\n",
2241 llmnr_support_to_string(link->network->llmnr));
bcb7a07e 2242 }
7374f9d8 2243
0d4ad91d
AR		 2244 if (!hashmap_isempty(link->bound_to_links)) {
2245 Link *carrier;
2246 Iterator i;
2247 bool space = false;
2248
2249 fputs("CARRIER_BOUND_TO=", f);
2250 HASHMAP_FOREACH(carrier, link->bound_to_links, i) {
2251 if (space)
2252 fputc(' ', f);
2253 fputs(carrier->ifname, f);
2254 space = true;
2255 }
2256
2257 fputs("\n", f);
2258 }
2259
2260 if (!hashmap_isempty(link->bound_by_links)) {
2261 Link *carrier;
2262 Iterator i;
2263 bool space = false;
2264
2265 fputs("CARRIER_BOUND_BY=", f);
0d4ad91d
AR		 2266 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
2267 if (space)
2268 fputc(' ', f);
2269 fputs(carrier->ifname, f);
2270 space = true;
2271 }
2272
2273 fputs("\n", f);
2274 }
2275
fe8db0c5 2276 if (link->dhcp_lease) {
d9876a52
TG		 2277 assert(link->network);
2278
1dc24d5f 2279 r = sd_dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 2280 if (r < 0)
c2d6bd61 2281 goto fail;
fe8db0c5 2282
7374f9d8 2283 fprintf(f,
b0e39c82
TG		 2284 "DHCP_LEASE=%s\n",
2285 link->lease_file);
deb2e523 2286 } else
68a8723c 2287 unlink(link->lease_file);
fe8db0c5 2288
49699bac
SS		 2289 if (link->lldp) {
2290 assert(link->network);
2291
2292 r = sd_lldp_save(link->lldp, link->lldp_file);
2293 if (r < 0)
2294 goto fail;
2295
2296 fprintf(f,
2297 "LLDP_FILE=%s\n",
2298 link->lldp_file);
2299 } else
2300 unlink(link->lldp_file);
2301
c2d6bd61
LP		 2302 r = fflush_and_check(f);
2303 if (r < 0)
2304 goto fail;
fe8db0c5 2305
c2d6bd61 2306 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 2307 r = -errno;
c2d6bd61 2308 goto fail;
fe8db0c5
TG		 2309 }
2310
c2d6bd61 2311 return 0;
c2d6bd61 2312fail:
6a7a4e4d
LP		 2313 log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
2314 (void) unlink(link->state_file);
2315
2316 if (temp_path)
2317 (void) unlink(temp_path);
2318
fe8db0c5
TG		 2319 return r;
2320}
2321
2322static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 2323 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 2324 [LINK_STATE_ENSLAVING] = "configuring",
2325 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
2326 [LINK_STATE_SETTING_ROUTES] = "configuring",
2327 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 2328 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 2329 [LINK_STATE_FAILED] = "failed",
370e9930 2330 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2331};
2332
2333DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 2334
2335static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 2336 [LINK_OPERSTATE_OFF] = "off",
2337 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
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TG		 2338 [LINK_OPERSTATE_DORMANT] = "dormant",
2339 [LINK_OPERSTATE_CARRIER] = "carrier",
2340 [LINK_OPERSTATE_DEGRADED] = "degraded",
2341 [LINK_OPERSTATE_ROUTABLE] = "routable",
2342};
2343
2344DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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