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[project/netifd.git] / interface-ip.c
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2012 Steven Barth <steven@midlink.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15 #include <string.h>
16 #include <stdlib.h>
17 #include <stdio.h>
18
19 #include <limits.h>
20 #include <arpa/inet.h>
21 #include <netinet/in.h>
22
23 #include "netifd.h"
24 #include "device.h"
25 #include "interface.h"
26 #include "interface-ip.h"
27 #include "proto.h"
28 #include "ubus.h"
29 #include "system.h"
30
31 enum {
32 ROUTE_INTERFACE,
33 ROUTE_TARGET,
34 ROUTE_MASK,
35 ROUTE_GATEWAY,
36 ROUTE_METRIC,
37 ROUTE_MTU,
38 ROUTE_VALID,
39 ROUTE_TABLE,
40 ROUTE_SOURCE,
41 ROUTE_ONLINK,
42 ROUTE_TYPE,
43 ROUTE_PROTO,
44 __ROUTE_MAX
45 };
46
47 static const struct blobmsg_policy route_attr[__ROUTE_MAX] = {
48 [ROUTE_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
49 [ROUTE_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
50 [ROUTE_MASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
51 [ROUTE_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
52 [ROUTE_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
53 [ROUTE_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
54 [ROUTE_TABLE] = { .name = "table", .type = BLOBMSG_TYPE_STRING },
55 [ROUTE_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_INT32 },
56 [ROUTE_SOURCE] = { .name = "source", .type = BLOBMSG_TYPE_STRING },
57 [ROUTE_ONLINK] = { .name = "onlink", .type = BLOBMSG_TYPE_BOOL },
58 [ROUTE_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
59 [ROUTE_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
60 };
61
62 const struct uci_blob_param_list route_attr_list = {
63 .n_params = __ROUTE_MAX,
64 .params = route_attr,
65 };
66
67
68 struct list_head prefixes = LIST_HEAD_INIT(prefixes);
69 static struct device_prefix *ula_prefix = NULL;
70 static struct uloop_timeout valid_until_timeout;
71
72
73 static void
74 clear_if_addr(union if_addr *a, int mask)
75 {
76 int m_bytes = (mask + 7) / 8;
77 uint8_t m_clear = (1 << (m_bytes * 8 - mask)) - 1;
78 uint8_t *p = (uint8_t *) a;
79
80 if (m_bytes < sizeof(*a))
81 memset(p + m_bytes, 0, sizeof(*a) - m_bytes);
82
83 p[m_bytes - 1] &= ~m_clear;
84 }
85
86 static bool
87 match_if_addr(union if_addr *a1, union if_addr *a2, int mask)
88 {
89 union if_addr *p1, *p2;
90
91 p1 = alloca(sizeof(*a1));
92 p2 = alloca(sizeof(*a2));
93
94 memcpy(p1, a1, sizeof(*a1));
95 clear_if_addr(p1, mask);
96 memcpy(p2, a2, sizeof(*a2));
97 clear_if_addr(p2, mask);
98
99 return !memcmp(p1, p2, sizeof(*p1));
100 }
101
102 static int set_ip_source_policy(bool add, bool v6, unsigned int priority,
103 const union if_addr *addr, uint8_t mask, unsigned int table,
104 struct interface *in_iface, const char *action, bool src)
105 {
106 struct iprule rule = {
107 .flags = IPRULE_PRIORITY,
108 .priority = priority
109 };
110
111 if (addr) {
112 if (src) {
113 rule.flags |= IPRULE_SRC;
114 rule.src_addr = *addr;
115 rule.src_mask = mask;
116 } else {
117 rule.flags |= IPRULE_DEST;
118 rule.dest_addr = *addr;
119 rule.dest_mask = mask;
120 }
121 }
122
123 if (table) {
124 rule.flags |= IPRULE_LOOKUP;
125 rule.lookup = table;
126
127 if (!rule.lookup)
128 return 0;
129 } else if (action) {
130 rule.flags |= IPRULE_ACTION;
131 system_resolve_iprule_action(action, &rule.action);
132 }
133
134 if (in_iface && in_iface->l3_dev.dev) {
135 rule.flags |= IPRULE_IN;
136 strcpy(rule.in_dev, in_iface->l3_dev.dev->ifname);
137 }
138
139 rule.flags |= (v6) ? IPRULE_INET6 : IPRULE_INET4;
140
141 return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
142 }
143
144 static int set_ip_lo_policy(bool add, bool v6, struct interface *iface)
145 {
146 struct iprule rule = {
147 .flags = IPRULE_IN | IPRULE_LOOKUP | IPRULE_PRIORITY,
148 .priority = IPRULE_PRIORITY_NW + iface->l3_dev.dev->ifindex,
149 .lookup = (v6) ? iface->ip6table : iface->ip4table,
150 .in_dev = "lo"
151 };
152
153 if (!rule.lookup)
154 return 0;
155
156 rule.flags |= (v6) ? IPRULE_INET6 : IPRULE_INET4;
157
158 return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
159 }
160
161 static bool
162 __find_ip_addr_target(struct interface_ip_settings *ip, union if_addr *a, bool v6)
163 {
164 struct device_addr *addr;
165
166 vlist_for_each_element(&ip->addr, addr, node) {
167 if (!addr->enabled)
168 continue;
169
170 if (v6 != ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
171 continue;
172
173 // Handle offlink addresses correctly
174 unsigned int mask = addr->mask;
175 if ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6 &&
176 (addr->flags & DEVADDR_OFFLINK))
177 mask = 128;
178
179 if (!match_if_addr(&addr->addr, a, mask))
180 continue;
181
182 return true;
183 }
184
185 return false;
186 }
187
188 static void
189 __find_ip_route_target(struct interface_ip_settings *ip, union if_addr *a,
190 bool v6, struct device_route **res)
191 {
192 struct device_route *route;
193
194 vlist_for_each_element(&ip->route, route, node) {
195 if (!route->enabled)
196 continue;
197
198 if (v6 != ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
199 continue;
200
201 if (!match_if_addr(&route->addr, a, route->mask))
202 continue;
203
204 if (route->flags & DEVROUTE_TABLE)
205 continue;
206
207 if (!*res || route->mask < (*res)->mask)
208 *res = route;
209 }
210 }
211
212 static bool
213 interface_ip_find_addr_target(struct interface *iface, union if_addr *a, bool v6)
214 {
215 return __find_ip_addr_target(&iface->proto_ip, a, v6) ||
216 __find_ip_addr_target(&iface->config_ip, a, v6);
217 }
218
219 static void
220 interface_ip_find_route_target(struct interface *iface, union if_addr *a,
221 bool v6, struct device_route **route)
222 {
223 __find_ip_route_target(&iface->proto_ip, a, v6, route);
224 __find_ip_route_target(&iface->config_ip, a, v6, route);
225 }
226
227 struct interface *
228 interface_ip_add_target_route(union if_addr *addr, bool v6, struct interface *iface)
229 {
230 struct device_route *route, *r_next = NULL;
231 bool defaultroute_target = false;
232 int addrsize = v6 ? sizeof(addr->in6) : sizeof(addr->in);
233
234 route = calloc(1, sizeof(*route));
235 if (!route)
236 return NULL;
237
238 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
239 route->mask = v6 ? 128 : 32;
240 if (memcmp(&route->addr, addr, addrsize) == 0)
241 defaultroute_target = true;
242 else
243 memcpy(&route->addr, addr, addrsize);
244
245 if (iface) {
246 /* look for locally addressable target first */
247 if (interface_ip_find_addr_target(iface, addr, v6))
248 goto done;
249
250 /* do not stop at the first route, let the lookup compare
251 * masks to find the best match */
252 interface_ip_find_route_target(iface, addr, v6, &r_next);
253 } else {
254 vlist_for_each_element(&interfaces, iface, node) {
255 /* look for locally addressable target first */
256 if (interface_ip_find_addr_target(iface, addr, v6))
257 goto done;
258
259 /* do not stop at the first route, let the lookup compare
260 * masks to find the best match */
261 interface_ip_find_route_target(iface, addr, v6, &r_next);
262 }
263 }
264
265 if (!r_next) {
266 free(route);
267 return NULL;
268 }
269
270 iface = r_next->iface;
271 memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
272 route->mtu = r_next->mtu;
273 route->metric = r_next->metric;
274 route->table = r_next->table;
275
276 done:
277 route->iface = iface;
278 if (defaultroute_target)
279 free(route);
280 else
281 vlist_add(&iface->host_routes, &route->node, route);
282 return iface;
283 }
284
285 static void
286 interface_set_route_info(struct interface *iface, struct device_route *route)
287 {
288 bool v6 = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6);
289
290 if (!iface)
291 return;
292
293 if (!(route->flags & DEVROUTE_METRIC))
294 route->metric = iface->metric;
295
296 if (!(route->flags & DEVROUTE_TABLE)) {
297 route->table = (v6) ? iface->ip6table : iface->ip4table;
298 if (route->table)
299 route->flags |= DEVROUTE_SRCTABLE;
300 }
301 }
302
303 void
304 interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
305 {
306 struct interface_ip_settings *ip;
307 struct blob_attr *tb[__ROUTE_MAX], *cur;
308 struct device_route *route;
309 int af = v6 ? AF_INET6 : AF_INET;
310
311 blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
312
313 if (!iface) {
314 if ((cur = tb[ROUTE_INTERFACE]) == NULL)
315 return;
316
317 iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
318 if (!iface)
319 return;
320
321 ip = &iface->config_ip;
322 } else {
323 ip = &iface->proto_ip;
324 }
325
326 route = calloc(1, sizeof(*route));
327 if (!route)
328 return;
329
330 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
331 route->mask = v6 ? 128 : 32;
332 if ((cur = tb[ROUTE_MASK]) != NULL) {
333 route->mask = parse_netmask_string(blobmsg_data(cur), v6);
334 if (route->mask > (v6 ? 128 : 32))
335 goto error;
336 }
337
338 if ((cur = tb[ROUTE_TARGET]) != NULL) {
339 if (!parse_ip_and_netmask(af, blobmsg_data(cur), &route->addr, &route->mask)) {
340 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
341 goto error;
342 }
343 }
344
345 if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
346 if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
347 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
348 goto error;
349 }
350 }
351
352 if ((cur = tb[ROUTE_METRIC]) != NULL) {
353 route->metric = blobmsg_get_u32(cur);
354 route->flags |= DEVROUTE_METRIC;
355 }
356
357 if ((cur = tb[ROUTE_MTU]) != NULL) {
358 route->mtu = blobmsg_get_u32(cur);
359 route->flags |= DEVROUTE_MTU;
360 }
361
362 // Use source-based routing
363 if ((cur = tb[ROUTE_SOURCE]) != NULL) {
364 char *saveptr, *source = alloca(blobmsg_data_len(cur));
365 memcpy(source, blobmsg_data(cur), blobmsg_data_len(cur));
366
367 const char *addr = strtok_r(source, "/", &saveptr);
368 const char *mask = strtok_r(NULL, "/", &saveptr);
369
370 if (!addr || inet_pton(af, addr, &route->source) < 1) {
371 DPRINTF("Failed to parse route source: %s\n", addr ? addr : "NULL");
372 goto error;
373 }
374
375 route->sourcemask = (mask) ? atoi(mask) : ((af == AF_INET6) ? 128 : 32);
376 }
377
378 if ((cur = tb[ROUTE_ONLINK]) != NULL && blobmsg_get_bool(cur))
379 route->flags |= DEVROUTE_ONLINK;
380
381 if ((cur = tb[ROUTE_TABLE]) != NULL) {
382 if (!system_resolve_rt_table(blobmsg_data(cur), &route->table)) {
383 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
384 goto error;
385 }
386
387 /* only set the table flag if not using the main (default) table */
388 if (system_is_default_rt_table(route->table))
389 route->table = 0;
390
391 if (route->table)
392 route->flags |= DEVROUTE_TABLE;
393 }
394
395 if ((cur = tb[ROUTE_VALID]) != NULL) {
396 int64_t valid = blobmsg_get_u32(cur);
397 int64_t valid_until = valid + (int64_t)system_get_rtime();
398 if (valid_until <= LONG_MAX && valid != 0xffffffffLL) // Catch overflow
399 route->valid_until = valid_until;
400 }
401
402 if ((cur = tb[ROUTE_TYPE]) != NULL) {
403 if (!system_resolve_rt_type(blobmsg_data(cur), &route->type)) {
404 DPRINTF("Failed to resolve routing type: %s\n", (char *) blobmsg_data(cur));
405 goto error;
406 }
407 route->flags |= DEVROUTE_TYPE;
408 }
409
410 if ((cur = tb[ROUTE_PROTO]) != NULL) {
411 if (!system_resolve_rt_proto(blobmsg_data(cur), &route->proto)) {
412 DPRINTF("Failed to resolve proto type: %s\n", (char *) blobmsg_data(cur));
413 goto error;
414 }
415 route->flags |= DEVROUTE_PROTO;
416 }
417
418 interface_set_route_info(iface, route);
419 vlist_add(&ip->route, &route->node, route);
420 return;
421
422 error:
423 free(route);
424 }
425
426 static int
427 addr_cmp(const void *k1, const void *k2, void *ptr)
428 {
429 return memcmp(k1, k2, sizeof(struct device_addr) -
430 offsetof(struct device_addr, flags));
431 }
432
433 static int
434 route_cmp(const void *k1, const void *k2, void *ptr)
435 {
436 const struct device_route *r1 = k1, *r2 = k2;
437
438 if (r1->mask != r2->mask)
439 return r2->mask - r1->mask;
440
441 if (r1->metric != r2->metric)
442 return r1->metric - r2->metric;
443
444 if (r1->flags != r2->flags)
445 return r2->flags - r1->flags;
446
447 if (r1->sourcemask != r2->sourcemask)
448 return r1->sourcemask - r2->sourcemask;
449
450 if (r1->table != r2->table)
451 return r1->table - r2->table;
452
453 int maskcmp = memcmp(&r1->source, &r2->source, sizeof(r1->source));
454 if (maskcmp)
455 return maskcmp;
456
457 return memcmp(&r1->addr, &r2->addr, sizeof(r1->addr));
458 }
459
460 static int
461 prefix_cmp(const void *k1, const void *k2, void *ptr)
462 {
463 return memcmp(k1, k2, offsetof(struct device_prefix, pclass) -
464 offsetof(struct device_prefix, addr));
465 }
466
467 static void
468 interface_handle_subnet_route(struct interface *iface, struct device_addr *addr, bool add)
469 {
470 struct device *dev = iface->l3_dev.dev;
471 struct device_route *r = &addr->subnet;
472
473 if (addr->flags & DEVADDR_OFFLINK)
474 return;
475
476 if (!add) {
477 if (!addr->subnet.iface)
478 return;
479
480 system_del_route(dev, r);
481 memset(r, 0, sizeof(*r));
482 return;
483 }
484
485 r->iface = iface;
486 r->flags = addr->flags;
487 r->mask = addr->mask;
488 memcpy(&r->addr, &addr->addr, sizeof(r->addr));
489 clear_if_addr(&r->addr, r->mask);
490
491 if (!system_resolve_rt_proto("kernel", &r->proto))
492 return;
493
494 r->flags |= DEVROUTE_PROTO;
495 system_del_route(dev, r);
496
497 r->flags &= ~DEVROUTE_PROTO;
498 interface_set_route_info(iface, r);
499
500 system_add_route(dev, r);
501 }
502
503 static void
504 interface_add_addr_rules(struct device_addr *addr, bool enabled)
505 {
506 bool v6 = (addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6;
507
508 set_ip_source_policy(enabled, v6, IPRULE_PRIORITY_ADDR, &addr->addr,
509 (v6) ? 128 : 32, addr->policy_table, NULL, NULL,
510 true);
511 set_ip_source_policy(enabled, v6, IPRULE_PRIORITY_ADDR_MASK,
512 &addr->addr, addr->mask, addr->policy_table, NULL,
513 NULL, false);
514 }
515
516 static void
517 interface_update_proto_addr(struct vlist_tree *tree,
518 struct vlist_node *node_new,
519 struct vlist_node *node_old)
520 {
521 struct interface_ip_settings *ip;
522 struct interface *iface;
523 struct device *dev;
524 struct device_addr *a_new = NULL, *a_old = NULL;
525 bool replace = false;
526 bool keep = false;
527 bool v6 = false;
528
529 ip = container_of(tree, struct interface_ip_settings, addr);
530 iface = ip->iface;
531 dev = iface->l3_dev.dev;
532
533 if (!node_new || !node_old)
534 iface->updated |= IUF_ADDRESS;
535
536 if (node_new) {
537 a_new = container_of(node_new, struct device_addr, node);
538
539 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
540 !a_new->broadcast) {
541
542 /* /31 and /32 addressing need 255.255.255.255
543 * as broadcast address. */
544 if (a_new->mask >= 31) {
545 a_new->broadcast = (uint32_t) ~0;
546 } else {
547 uint32_t mask = ~0;
548 uint32_t *a = (uint32_t *) &a_new->addr;
549
550 mask >>= a_new->mask;
551 a_new->broadcast = *a | htonl(mask);
552 }
553 }
554 }
555
556 if (node_old)
557 a_old = container_of(node_old, struct device_addr, node);
558
559 if (a_new && a_old) {
560 keep = true;
561
562 if (a_old->flags != a_new->flags || a_old->failed)
563 keep = false;
564
565 if (a_old->valid_until != a_new->valid_until ||
566 a_old->preferred_until != a_new->preferred_until)
567 replace = true;
568
569 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
570 a_new->broadcast != a_old->broadcast)
571 keep = false;
572 }
573
574 if (node_old) {
575 if (a_old->enabled && !keep) {
576 //This is needed for source routing to work correctly. If a device
577 //has two connections to a network using the same subnet, adding
578 //only the network-rule will cause packets to be routed through the
579 //first matching network (source IP matches both masks).
580 if (a_old->policy_table)
581 interface_add_addr_rules(a_old, false);
582
583 if (!(a_old->flags & DEVADDR_EXTERNAL)) {
584 interface_handle_subnet_route(iface, a_old, false);
585 system_del_address(dev, a_old);
586 }
587 }
588 free(a_old->pclass);
589 free(a_old);
590 }
591
592 if (node_new) {
593 a_new->enabled = true;
594
595 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
596 v6 = true;
597
598 a_new->policy_table = (v6) ? iface->ip6table : iface->ip4table;
599
600 if (!keep || replace) {
601 if (!(a_new->flags & DEVADDR_EXTERNAL)) {
602 if (system_add_address(dev, a_new))
603 a_new->failed = true;
604
605 if (iface->metric || a_new->policy_table)
606 interface_handle_subnet_route(iface, a_new, true);
607 }
608
609 if (!keep) {
610 if (a_new->policy_table)
611 interface_add_addr_rules(a_new, true);
612 }
613 }
614 }
615 }
616
617 static bool
618 enable_route(struct interface_ip_settings *ip, struct device_route *route)
619 {
620 if (ip->no_defaultroute && !route->mask)
621 return false;
622
623 return ip->enabled;
624 }
625
626 static void
627 interface_update_proto_route(struct vlist_tree *tree,
628 struct vlist_node *node_new,
629 struct vlist_node *node_old)
630 {
631 struct interface_ip_settings *ip;
632 struct interface *iface;
633 struct device *dev;
634 struct device_route *route_old, *route_new;
635 bool keep = false;
636
637 ip = container_of(tree, struct interface_ip_settings, route);
638 iface = ip->iface;
639 dev = iface->l3_dev.dev;
640
641 if (!node_new || !node_old)
642 iface->updated |= IUF_ROUTE;
643
644 route_old = container_of(node_old, struct device_route, node);
645 route_new = container_of(node_new, struct device_route, node);
646
647 if (node_old && node_new)
648 keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop)) &&
649 (route_old->mtu == route_new->mtu) && (route_old->type == route_new->type) &&
650 (route_old->proto == route_new->proto) && !route_old->failed;
651
652 if (node_old) {
653 if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
654 system_del_route(dev, route_old);
655
656 free(route_old);
657 }
658
659 if (node_new) {
660 bool _enabled = enable_route(ip, route_new);
661
662 if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
663 if (system_add_route(dev, route_new))
664 route_new->failed = true;
665
666 route_new->iface = iface;
667 route_new->enabled = _enabled;
668 }
669 }
670
671 static void
672 interface_update_host_route(struct vlist_tree *tree,
673 struct vlist_node *node_new,
674 struct vlist_node *node_old)
675 {
676 struct interface *iface;
677 struct device *dev;
678 struct device_route *route_old, *route_new;
679
680 iface = container_of(tree, struct interface, host_routes);
681 dev = iface->l3_dev.dev;
682
683 route_old = container_of(node_old, struct device_route, node);
684 route_new = container_of(node_new, struct device_route, node);
685
686 if (node_old) {
687 system_del_route(dev, route_old);
688 free(route_old);
689 }
690
691 if (node_new) {
692 if (system_add_route(dev, route_new))
693 route_new->failed = true;
694 }
695 }
696
697 static void
698 random_ifaceid(struct in6_addr *addr)
699 {
700 static bool initialized = false;
701 struct timeval t;
702
703 if (!initialized) {
704 long int seed = 0;
705 gettimeofday(&t, NULL);
706 seed = t.tv_sec ^ t.tv_usec ^ getpid();
707 srand48(seed);
708 initialized = true;
709 }
710 addr->s6_addr32[2] = (uint32_t)mrand48();
711 addr->s6_addr32[3] = (uint32_t)mrand48();
712 }
713
714 static void
715 eui64_ifaceid(struct interface *iface, struct in6_addr *addr)
716 {
717 /* get mac address */
718 uint8_t *macaddr = iface->l3_dev.dev->settings.macaddr;
719 uint8_t *ifaceid = addr->s6_addr + 8;
720 memcpy(ifaceid,macaddr,3);
721 memcpy(ifaceid + 5,macaddr + 3, 3);
722 ifaceid[3] = 0xff;
723 ifaceid[4] = 0xfe;
724 ifaceid[0] ^= 0x02;
725 }
726
727 static void
728 generate_ifaceid(struct interface *iface, struct in6_addr *addr)
729 {
730 /* generate new iface id */
731 switch (iface->assignment_iface_id_selection) {
732 case IFID_FIXED:
733 /* fixed */
734 /* copy host part from assignment_fixed_iface_id */
735 memcpy(addr->s6_addr + 8, iface->assignment_fixed_iface_id.s6_addr + 8, 8);
736 break;
737 case IFID_RANDOM:
738 /* randomize last 64 bits */
739 random_ifaceid(addr);
740 break;
741 case IFID_EUI64:
742 /* eui64 */
743 eui64_ifaceid(iface, addr);
744 break;
745 }
746 }
747
748 static void
749 interface_set_prefix_address(struct device_prefix_assignment *assignment,
750 const struct device_prefix *prefix, struct interface *iface, bool add)
751 {
752 const struct interface *uplink = prefix->iface;
753 if (!iface->l3_dev.dev)
754 return;
755
756 struct device *l3_downlink = iface->l3_dev.dev;
757
758 struct device_addr addr;
759 struct device_route route;
760 memset(&addr, 0, sizeof(addr));
761 memset(&route, 0, sizeof(route));
762
763 if (IN6_IS_ADDR_UNSPECIFIED(&assignment->addr)) {
764 addr.addr.in6 = prefix->addr;
765 addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
766 generate_ifaceid(iface, &addr.addr.in6);
767 assignment->addr = addr.addr.in6;
768 }
769 else
770 addr.addr.in6 = assignment->addr;
771
772 addr.mask = assignment->length;
773 addr.flags = DEVADDR_INET6 | DEVADDR_OFFLINK;
774 addr.preferred_until = prefix->preferred_until;
775 addr.valid_until = prefix->valid_until;
776
777 route.flags = DEVADDR_INET6;
778 route.mask = addr.mask < 64 ? 64 : addr.mask;
779 route.addr = addr.addr;
780 clear_if_addr(&route.addr, route.mask);
781 interface_set_route_info(iface, &route);
782
783 if (!add && assignment->enabled) {
784 time_t now = system_get_rtime();
785 addr.preferred_until = now;
786 if (!addr.valid_until || addr.valid_until - now > 7200)
787 addr.valid_until = now + 7200;
788
789 if (prefix->iface) {
790 if (prefix->iface->ip6table)
791 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW, &addr.addr,
792 addr.mask, prefix->iface->ip6table, iface, NULL, true);
793
794 set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT, &addr.addr,
795 addr.mask, 0, iface, "unreachable", true);
796 }
797
798 system_del_route(l3_downlink, &route);
799 system_add_address(l3_downlink, &addr);
800
801 assignment->enabled = false;
802 } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP) &&
803 !system_add_address(l3_downlink, &addr)) {
804
805 if (prefix->iface && !assignment->enabled) {
806 set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT, &addr.addr,
807 addr.mask, 0, iface, "unreachable", true);
808
809 if (prefix->iface->ip6table)
810 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW, &addr.addr,
811 addr.mask, prefix->iface->ip6table, iface, NULL, true);
812 }
813
814 route.metric = iface->metric;
815 system_add_route(l3_downlink, &route);
816
817 if (uplink && uplink->l3_dev.dev && !(l3_downlink->settings.flags & DEV_OPT_MTU6)) {
818 int mtu = system_update_ipv6_mtu(uplink->l3_dev.dev, 0);
819 int mtu_old = system_update_ipv6_mtu(l3_downlink, 0);
820
821 if (mtu > 0 && mtu_old > mtu)
822 system_update_ipv6_mtu(l3_downlink, mtu);
823 }
824
825 assignment->enabled = true;
826 }
827 }
828
829 static bool interface_prefix_assign(struct list_head *list,
830 struct device_prefix_assignment *assign)
831 {
832 int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
833 struct device_prefix_assignment *c;
834 list_for_each_entry(c, list, head) {
835 if (assign->assigned != -1) {
836 if (assign->assigned >= current && assign->assigned + asize < c->assigned) {
837 list_add_tail(&assign->head, &c->head);
838 return true;
839 }
840 } else if (assign->assigned == -1) {
841 current = (current + asize) & (~asize);
842 if (current + asize < c->assigned) {
843 assign->assigned = current;
844 list_add_tail(&assign->head, &c->head);
845 return true;
846 }
847 }
848 current = (c->assigned + (1 << (64 - c->length)));
849 }
850 return false;
851 }
852
853 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
854 {
855 struct device_prefix_assignment *c;
856 struct interface *iface;
857
858 // Delete all assignments
859 while (!list_empty(&prefix->assignments)) {
860 c = list_first_entry(&prefix->assignments,
861 struct device_prefix_assignment, head);
862 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
863 interface_set_prefix_address(c, prefix, iface, false);
864 list_del(&c->head);
865 free(c);
866 }
867
868 if (!setup)
869 return;
870
871 // End-of-assignment sentinel
872 c = malloc(sizeof(*c) + 1);
873 if (!c)
874 return;
875
876 c->assigned = 1 << (64 - prefix->length);
877 c->length = 64;
878 c->name[0] = 0;
879 c->addr = in6addr_any;
880 list_add(&c->head, &prefix->assignments);
881
882 // Excluded prefix
883 if (prefix->excl_length > 0) {
884 const char name[] = "!excluded";
885 c = malloc(sizeof(*c) + sizeof(name));
886 if (c) {
887 c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
888 ((1 << (64 - prefix->length)) - 1);
889 c->length = prefix->excl_length;
890 c->addr = in6addr_any;
891 memcpy(c->name, name, sizeof(name));
892 list_add(&c->head, &prefix->assignments);
893 }
894 }
895
896 bool assigned_any = false;
897 struct list_head assign_later = LIST_HEAD_INIT(assign_later);
898 vlist_for_each_element(&interfaces, iface, node) {
899 if (iface->assignment_length < 48 ||
900 iface->assignment_length > 64)
901 continue;
902
903 // Test whether there is a matching class
904 if (!list_empty(&iface->assignment_classes)) {
905 bool found = false;
906
907 struct interface_assignment_class *c;
908 list_for_each_entry(c, &iface->assignment_classes, head) {
909 if (!strcmp(c->name, prefix->pclass)) {
910 found = true;
911 break;
912 }
913 }
914
915 if (!found)
916 continue;
917 }
918
919 size_t namelen = strlen(iface->name) + 1;
920 c = malloc(sizeof(*c) + namelen);
921 if (!c)
922 continue;
923
924 c->length = iface->assignment_length;
925 c->assigned = iface->assignment_hint;
926 c->addr = in6addr_any;
927 c->enabled = false;
928 memcpy(c->name, iface->name, namelen);
929
930 // First process all custom assignments, put all others in later-list
931 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
932 if (c->assigned != -1) {
933 c->assigned = -1;
934 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
935 "of size %hhu for %s, trying other\n", c->length, c->name);
936 }
937
938 struct list_head *next = &assign_later;
939 struct device_prefix_assignment *n;
940 list_for_each_entry(n, &assign_later, head) {
941 if (n->length < c->length) {
942 next = &n->head;
943 break;
944 }
945 }
946 list_add_tail(&c->head, next);
947 }
948
949 if (c->assigned != -1)
950 assigned_any = true;
951 }
952
953 // Then try to assign all other + failed custom assignments
954 while (!list_empty(&assign_later)) {
955 c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
956 list_del(&c->head);
957
958 bool assigned = false;
959 do {
960 assigned = interface_prefix_assign(&prefix->assignments, c);
961 } while (!assigned && ++c->length <= 64);
962
963 if (!assigned) {
964 netifd_log_message(L_WARNING, "Failed to assign subprefix "
965 "of size %hhu for %s\n", c->length, c->name);
966 free(c);
967 } else {
968 assigned_any = true;
969 }
970 }
971
972 list_for_each_entry(c, &prefix->assignments, head)
973 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
974 interface_set_prefix_address(c, prefix, iface, true);
975
976 if (!assigned_any)
977 netifd_log_message(L_WARNING, "You have delegated IPv6-prefixes but haven't assigned them "
978 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
979 }
980
981
982 void interface_refresh_assignments(bool hint)
983 {
984 static bool refresh = false;
985 if (!hint && refresh) {
986 struct device_prefix *p;
987 list_for_each_entry(p, &prefixes, head)
988 interface_update_prefix_assignments(p, true);
989 }
990 refresh = hint;
991 }
992
993
994 static void
995 interface_update_prefix(struct vlist_tree *tree,
996 struct vlist_node *node_new,
997 struct vlist_node *node_old)
998 {
999 struct device_prefix *prefix_old, *prefix_new;
1000 prefix_old = container_of(node_old, struct device_prefix, node);
1001 prefix_new = container_of(node_new, struct device_prefix, node);
1002
1003 struct interface_ip_settings *ip = container_of(tree, struct interface_ip_settings, prefix);
1004 if (tree && (!node_new || !node_old))
1005 ip->iface->updated |= IUF_PREFIX;
1006
1007 struct device_route route;
1008 memset(&route, 0, sizeof(route));
1009 route.flags = DEVADDR_INET6;
1010 route.metric = INT32_MAX;
1011 route.mask = (node_new) ? prefix_new->length : prefix_old->length;
1012 route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
1013
1014
1015 struct device_prefix_assignment *c;
1016 struct interface *iface;
1017
1018 if (node_old && node_new) {
1019 // Move assignments and refresh addresses to update valid times
1020 list_splice(&prefix_old->assignments, &prefix_new->assignments);
1021
1022 list_for_each_entry(c, &prefix_new->assignments, head)
1023 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
1024 interface_set_prefix_address(c, prefix_new, iface, true);
1025 } else if (node_new) {
1026 // Set null-route to avoid routing loops
1027 system_add_route(NULL, &route);
1028
1029 if (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation)
1030 interface_update_prefix_assignments(prefix_new, true);
1031 } else if (node_old) {
1032 // Remove null-route
1033 interface_update_prefix_assignments(prefix_old, false);
1034 system_del_route(NULL, &route);
1035 }
1036
1037 if (node_old) {
1038 if (prefix_old->head.next)
1039 list_del(&prefix_old->head);
1040 free(prefix_old);
1041 }
1042
1043 if (node_new && (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation))
1044 list_add(&prefix_new->head, &prefixes);
1045
1046 }
1047
1048 struct device_prefix*
1049 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
1050 uint8_t length, time_t valid_until, time_t preferred_until,
1051 struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
1052 {
1053 if (!pclass)
1054 pclass = (iface) ? iface->name : "local";
1055
1056 struct device_prefix *prefix = calloc(1, sizeof(*prefix) + strlen(pclass) + 1);
1057 if (!prefix)
1058 return NULL;
1059
1060 prefix->length = length;
1061 prefix->addr = *addr;
1062 prefix->preferred_until = preferred_until;
1063 prefix->valid_until = valid_until;
1064 prefix->iface = iface;
1065 INIT_LIST_HEAD(&prefix->assignments);
1066
1067 if (excl_addr) {
1068 prefix->excl_addr = *excl_addr;
1069 prefix->excl_length = excl_length;
1070 }
1071
1072 strcpy(prefix->pclass, pclass);
1073
1074 if (iface)
1075 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
1076 else
1077 interface_update_prefix(NULL, &prefix->node, NULL);
1078
1079 return prefix;
1080 }
1081
1082 void
1083 interface_ip_set_ula_prefix(const char *prefix)
1084 {
1085 char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
1086 if (prefix)
1087 strncpy(buf, prefix, sizeof(buf) - 1);
1088 char *prefixaddr = strtok_r(buf, "/", &saveptr);
1089
1090 struct in6_addr addr;
1091 if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
1092 if (ula_prefix) {
1093 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1094 ula_prefix = NULL;
1095 }
1096 return;
1097 }
1098
1099 int length;
1100 char *prefixlen = strtok_r(NULL, ",", &saveptr);
1101 if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
1102 return;
1103
1104 if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
1105 ula_prefix->length != length) {
1106 if (ula_prefix)
1107 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1108
1109 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
1110 0, 0, NULL, 0, NULL);
1111 }
1112 }
1113
1114 void
1115 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
1116 {
1117 struct dns_server *s;
1118
1119 s = calloc(1, sizeof(*s));
1120 if (!s)
1121 return;
1122
1123 s->af = AF_INET;
1124 if (inet_pton(s->af, str, &s->addr.in))
1125 goto add;
1126
1127 s->af = AF_INET6;
1128 if (inet_pton(s->af, str, &s->addr.in))
1129 goto add;
1130
1131 free(s);
1132 return;
1133
1134 add:
1135 D(INTERFACE, "Add IPv%c DNS server: %s\n",
1136 s->af == AF_INET6 ? '6' : '4', str);
1137 vlist_simple_add(&ip->dns_servers, &s->node);
1138 }
1139
1140 void
1141 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
1142 {
1143 struct blob_attr *cur;
1144 int rem;
1145
1146 blobmsg_for_each_attr(cur, list, rem) {
1147 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1148 continue;
1149
1150 if (!blobmsg_check_attr(cur, NULL))
1151 continue;
1152
1153 interface_add_dns_server(ip, blobmsg_data(cur));
1154 }
1155 }
1156
1157 static void
1158 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
1159 {
1160 struct dns_search_domain *s;
1161 int len = strlen(str);
1162
1163 s = calloc(1, sizeof(*s) + len + 1);
1164 if (!s)
1165 return;
1166
1167 D(INTERFACE, "Add DNS search domain: %s\n", str);
1168 memcpy(s->name, str, len);
1169 vlist_simple_add(&ip->dns_search, &s->node);
1170 }
1171
1172 void
1173 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
1174 {
1175 struct blob_attr *cur;
1176 int rem;
1177
1178 blobmsg_for_each_attr(cur, list, rem) {
1179 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1180 continue;
1181
1182 if (!blobmsg_check_attr(cur, NULL))
1183 continue;
1184
1185 interface_add_dns_search_domain(ip, blobmsg_data(cur));
1186 }
1187 }
1188
1189 static void
1190 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip, const char *dev)
1191 {
1192 struct dns_server *s;
1193 struct dns_search_domain *d;
1194 const char *str;
1195 char buf[INET6_ADDRSTRLEN];
1196
1197 vlist_simple_for_each_element(&ip->dns_servers, s, node) {
1198 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
1199 if (!str)
1200 continue;
1201
1202 if (s->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&s->addr.in6))
1203 fprintf(f, "nameserver %s%%%s\n", str, dev);
1204 else
1205 fprintf(f, "nameserver %s\n", str);
1206 }
1207
1208 vlist_simple_for_each_element(&ip->dns_search, d, node) {
1209 fprintf(f, "search %s\n", d->name);
1210 }
1211 }
1212
1213 /* Sorting of interface resolver entries : */
1214 /* Primary on interface dns_metric : lowest metric first */
1215 /* Secondary on interface metric : lowest metric first */
1216 /* Finally alphabetical order of interface names */
1217 static int resolv_conf_iface_cmp(const void *k1, const void *k2, void *ptr)
1218 {
1219 const struct interface *iface1 = k1, *iface2 = k2;
1220
1221 if (iface1->dns_metric != iface2->dns_metric)
1222 return iface1->dns_metric - iface2->dns_metric;
1223
1224 if (iface1->metric != iface2->metric)
1225 return iface1->metric - iface2->metric;
1226
1227 return strcmp(iface1->name, iface2->name);
1228 }
1229
1230 static void
1231 __interface_write_dns_entries(FILE *f)
1232 {
1233 struct interface *iface;
1234 struct {
1235 struct avl_node node;
1236 } *entry, *n_entry;
1237 struct avl_tree resolv_conf_iface_entries;
1238
1239 avl_init(&resolv_conf_iface_entries, resolv_conf_iface_cmp, false, NULL);
1240
1241 vlist_for_each_element(&interfaces, iface, node) {
1242 if (iface->state != IFS_UP)
1243 continue;
1244
1245 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
1246 vlist_simple_empty(&iface->proto_ip.dns_servers) &&
1247 vlist_simple_empty(&iface->config_ip.dns_search) &&
1248 vlist_simple_empty(&iface->config_ip.dns_servers))
1249 continue;
1250
1251 entry = calloc(1, sizeof(*entry));
1252 if (!entry)
1253 continue;
1254
1255 entry->node.key = iface;
1256 avl_insert(&resolv_conf_iface_entries, &entry->node);
1257 }
1258
1259 avl_for_each_element(&resolv_conf_iface_entries, entry, node) {
1260 iface = (struct interface *)entry->node.key;
1261
1262 fprintf(f, "# Interface %s\n", iface->name);
1263
1264 write_resolv_conf_entries(f, &iface->config_ip, iface->ifname);
1265
1266 if (!iface->proto_ip.no_dns)
1267 write_resolv_conf_entries(f, &iface->proto_ip, iface->ifname);
1268 }
1269
1270 avl_remove_all_elements(&resolv_conf_iface_entries, entry, node, n_entry)
1271 free(entry);
1272 }
1273
1274 void
1275 interface_write_resolv_conf(void)
1276 {
1277 char *path = alloca(strlen(resolv_conf) + 5);
1278 FILE *f;
1279 uint32_t crcold, crcnew;
1280
1281 sprintf(path, "%s.tmp", resolv_conf);
1282 unlink(path);
1283 f = fopen(path, "w+");
1284 if (!f) {
1285 D(INTERFACE, "Failed to open %s for writing\n", path);
1286 return;
1287 }
1288
1289 __interface_write_dns_entries(f);
1290
1291 fflush(f);
1292 rewind(f);
1293 crcnew = crc32_file(f);
1294 fclose(f);
1295
1296 crcold = crcnew + 1;
1297 f = fopen(resolv_conf, "r");
1298 if (f) {
1299 crcold = crc32_file(f);
1300 fclose(f);
1301 }
1302
1303 if (crcold == crcnew) {
1304 unlink(path);
1305 } else if (rename(path, resolv_conf) < 0) {
1306 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
1307 unlink(path);
1308 }
1309 }
1310
1311 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
1312 {
1313 struct device_addr *addr;
1314 struct device_route *route;
1315 struct device *dev;
1316 struct interface *iface;
1317
1318 ip->enabled = enabled;
1319 iface = ip->iface;
1320 dev = iface->l3_dev.dev;
1321 if (!dev)
1322 return;
1323
1324 vlist_for_each_element(&ip->addr, addr, node) {
1325 bool v6 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6) ? true : false;
1326
1327 if (addr->flags & DEVADDR_EXTERNAL)
1328 continue;
1329
1330 if (addr->enabled == enabled)
1331 continue;
1332
1333 if (enabled) {
1334 system_add_address(dev, addr);
1335
1336 addr->policy_table = (v6) ? iface->ip6table : iface->ip4table;
1337 if (iface->metric || addr->policy_table)
1338 interface_handle_subnet_route(iface, addr, true);
1339
1340 if (addr->policy_table)
1341 interface_add_addr_rules(addr, true);
1342 } else {
1343 interface_handle_subnet_route(iface, addr, false);
1344 system_del_address(dev, addr);
1345
1346 if (addr->policy_table)
1347 interface_add_addr_rules(addr, false);
1348 }
1349 addr->enabled = enabled;
1350 }
1351
1352 vlist_for_each_element(&ip->route, route, node) {
1353 bool _enabled = enabled;
1354
1355 if (route->flags & DEVADDR_EXTERNAL)
1356 continue;
1357
1358 if (!enable_route(ip, route))
1359 _enabled = false;
1360
1361 if (route->enabled == _enabled)
1362 continue;
1363
1364 if (_enabled) {
1365 interface_set_route_info(ip->iface, route);
1366
1367 if (system_add_route(dev, route))
1368 route->failed = true;
1369 } else
1370 system_del_route(dev, route);
1371 route->enabled = _enabled;
1372 }
1373
1374 struct device_prefix *c;
1375 struct device_prefix_assignment *a;
1376 list_for_each_entry(c, &prefixes, head)
1377 list_for_each_entry(a, &c->assignments, head)
1378 if (!strcmp(a->name, ip->iface->name))
1379 interface_set_prefix_address(a, c, ip->iface, enabled);
1380
1381 if (ip->iface && ip->iface->policy_rules_set != enabled &&
1382 ip->iface->l3_dev.dev) {
1383 set_ip_lo_policy(enabled, true, ip->iface);
1384 set_ip_lo_policy(enabled, false, ip->iface);
1385
1386 set_ip_source_policy(enabled, true, IPRULE_PRIORITY_REJECT + ip->iface->l3_dev.dev->ifindex,
1387 NULL, 0, 0, ip->iface, "failed_policy", true);
1388 ip->iface->policy_rules_set = enabled;
1389 }
1390 }
1391
1392 void
1393 interface_ip_update_start(struct interface_ip_settings *ip)
1394 {
1395 if (ip != &ip->iface->config_ip) {
1396 vlist_simple_update(&ip->dns_servers);
1397 vlist_simple_update(&ip->dns_search);
1398 }
1399 vlist_update(&ip->route);
1400 vlist_update(&ip->addr);
1401 vlist_update(&ip->prefix);
1402 }
1403
1404 void
1405 interface_ip_update_complete(struct interface_ip_settings *ip)
1406 {
1407 vlist_simple_flush(&ip->dns_servers);
1408 vlist_simple_flush(&ip->dns_search);
1409 vlist_flush(&ip->route);
1410 vlist_flush(&ip->addr);
1411 vlist_flush(&ip->prefix);
1412 interface_write_resolv_conf();
1413 }
1414
1415 void
1416 interface_ip_flush(struct interface_ip_settings *ip)
1417 {
1418 if (ip == &ip->iface->proto_ip)
1419 vlist_flush_all(&ip->iface->host_routes);
1420 vlist_simple_flush_all(&ip->dns_servers);
1421 vlist_simple_flush_all(&ip->dns_search);
1422 vlist_flush_all(&ip->route);
1423 vlist_flush_all(&ip->addr);
1424 vlist_flush_all(&ip->prefix);
1425 }
1426
1427 static void
1428 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1429 {
1430 ip->iface = iface;
1431 ip->enabled = true;
1432 vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1433 vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1434 vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1435 vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1436 vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1437 }
1438
1439 void
1440 interface_ip_init(struct interface *iface)
1441 {
1442 __interface_ip_init(&iface->proto_ip, iface);
1443 __interface_ip_init(&iface->config_ip, iface);
1444 vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1445 }
1446
1447 static void
1448 interface_ip_valid_until_handler(struct uloop_timeout *t)
1449 {
1450 time_t now = system_get_rtime();
1451 struct interface *iface;
1452 vlist_for_each_element(&interfaces, iface, node) {
1453 if (iface->state != IFS_UP)
1454 continue;
1455
1456 struct device_addr *addr, *addrp;
1457 struct device_route *route, *routep;
1458 struct device_prefix *pref, *prefp;
1459
1460 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1461 if (addr->valid_until && addr->valid_until < now)
1462 vlist_delete(&iface->proto_ip.addr, &addr->node);
1463
1464 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1465 if (route->valid_until && route->valid_until < now)
1466 vlist_delete(&iface->proto_ip.route, &route->node);
1467
1468 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1469 if (pref->valid_until && pref->valid_until < now)
1470 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1471
1472 }
1473
1474 uloop_timeout_set(t, 1000);
1475 }
1476
1477 static void __init
1478 interface_ip_init_worker(void)
1479 {
1480 valid_until_timeout.cb = interface_ip_valid_until_handler;
1481 uloop_timeout_set(&valid_until_timeout, 1000);
1482 }
OpenWrt Network interface configuration daemon