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interface-ip: fix route selection for host dependencies
[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 done:
266 if (!r_next) {
267 free(route);
268 return NULL;
269 }
270
271 iface = r_next->iface;
272 memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
273 route->mtu = r_next->mtu;
274 route->metric = r_next->metric;
275 route->table = r_next->table;
276 route->iface = iface;
277 if (defaultroute_target)
278 free(route);
279 else
280 vlist_add(&iface->host_routes, &route->node, route);
281 return iface;
282 }
283
284 static void
285 interface_set_route_info(struct interface *iface, struct device_route *route)
286 {
287 bool v6 = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6);
288
289 if (!iface)
290 return;
291
292 if (!(route->flags & DEVROUTE_METRIC))
293 route->metric = iface->metric;
294
295 if (!(route->flags & DEVROUTE_TABLE)) {
296 route->table = (v6) ? iface->ip6table : iface->ip4table;
297 if (route->table)
298 route->flags |= DEVROUTE_SRCTABLE;
299 }
300 }
301
302 void
303 interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
304 {
305 struct interface_ip_settings *ip;
306 struct blob_attr *tb[__ROUTE_MAX], *cur;
307 struct device_route *route;
308 int af = v6 ? AF_INET6 : AF_INET;
309
310 blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
311
312 if (!iface) {
313 if ((cur = tb[ROUTE_INTERFACE]) == NULL)
314 return;
315
316 iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
317 if (!iface)
318 return;
319
320 ip = &iface->config_ip;
321 } else {
322 ip = &iface->proto_ip;
323 }
324
325 route = calloc(1, sizeof(*route));
326 if (!route)
327 return;
328
329 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
330 route->mask = v6 ? 128 : 32;
331 if ((cur = tb[ROUTE_MASK]) != NULL) {
332 route->mask = parse_netmask_string(blobmsg_data(cur), v6);
333 if (route->mask > (v6 ? 128 : 32))
334 goto error;
335 }
336
337 if ((cur = tb[ROUTE_TARGET]) != NULL) {
338 if (!parse_ip_and_netmask(af, blobmsg_data(cur), &route->addr, &route->mask)) {
339 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
340 goto error;
341 }
342 }
343
344 if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
345 if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
346 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
347 goto error;
348 }
349 }
350
351 if ((cur = tb[ROUTE_METRIC]) != NULL) {
352 route->metric = blobmsg_get_u32(cur);
353 route->flags |= DEVROUTE_METRIC;
354 }
355
356 if ((cur = tb[ROUTE_MTU]) != NULL) {
357 route->mtu = blobmsg_get_u32(cur);
358 route->flags |= DEVROUTE_MTU;
359 }
360
361 // Use source-based routing
362 if ((cur = tb[ROUTE_SOURCE]) != NULL) {
363 char *saveptr, *source = alloca(blobmsg_data_len(cur));
364 memcpy(source, blobmsg_data(cur), blobmsg_data_len(cur));
365
366 const char *addr = strtok_r(source, "/", &saveptr);
367 const char *mask = strtok_r(NULL, "/", &saveptr);
368
369 if (!addr || inet_pton(af, addr, &route->source) < 1) {
370 DPRINTF("Failed to parse route source: %s\n", addr ? addr : "NULL");
371 goto error;
372 }
373
374 route->sourcemask = (mask) ? atoi(mask) : ((af == AF_INET6) ? 128 : 32);
375 }
376
377 if ((cur = tb[ROUTE_ONLINK]) != NULL && blobmsg_get_bool(cur))
378 route->flags |= DEVROUTE_ONLINK;
379
380 if ((cur = tb[ROUTE_TABLE]) != NULL) {
381 if (!system_resolve_rt_table(blobmsg_data(cur), &route->table)) {
382 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
383 goto error;
384 }
385
386 /* only set the table flag if not using the main (default) table */
387 if (system_is_default_rt_table(route->table))
388 route->table = 0;
389
390 if (route->table)
391 route->flags |= DEVROUTE_TABLE;
392 }
393
394 if ((cur = tb[ROUTE_VALID]) != NULL) {
395 int64_t valid = blobmsg_get_u32(cur);
396 int64_t valid_until = valid + (int64_t)system_get_rtime();
397 if (valid_until <= LONG_MAX && valid != 0xffffffffLL) // Catch overflow
398 route->valid_until = valid_until;
399 }
400
401 if ((cur = tb[ROUTE_TYPE]) != NULL) {
402 if (!system_resolve_rt_type(blobmsg_data(cur), &route->type)) {
403 DPRINTF("Failed to resolve routing type: %s\n", (char *) blobmsg_data(cur));
404 goto error;
405 }
406 route->flags |= DEVROUTE_TYPE;
407 }
408
409 if ((cur = tb[ROUTE_PROTO]) != NULL) {
410 if (!system_resolve_rt_proto(blobmsg_data(cur), &route->proto)) {
411 DPRINTF("Failed to resolve proto type: %s\n", (char *) blobmsg_data(cur));
412 goto error;
413 }
414 route->flags |= DEVROUTE_PROTO;
415 }
416
417 interface_set_route_info(iface, route);
418 vlist_add(&ip->route, &route->node, route);
419 return;
420
421 error:
422 free(route);
423 }
424
425 static int
426 addr_cmp(const void *k1, const void *k2, void *ptr)
427 {
428 return memcmp(k1, k2, sizeof(struct device_addr) -
429 offsetof(struct device_addr, flags));
430 }
431
432 static int
433 route_cmp(const void *k1, const void *k2, void *ptr)
434 {
435 const struct device_route *r1 = k1, *r2 = k2;
436
437 if (r1->mask != r2->mask)
438 return r2->mask - r1->mask;
439
440 if (r1->metric != r2->metric)
441 return r1->metric - r2->metric;
442
443 if (r1->flags != r2->flags)
444 return r2->flags - r1->flags;
445
446 if (r1->sourcemask != r2->sourcemask)
447 return r1->sourcemask - r2->sourcemask;
448
449 if (r1->table != r2->table)
450 return r1->table - r2->table;
451
452 int maskcmp = memcmp(&r1->source, &r2->source, sizeof(r1->source));
453 if (maskcmp)
454 return maskcmp;
455
456 return memcmp(&r1->addr, &r2->addr, sizeof(r1->addr));
457 }
458
459 static int
460 prefix_cmp(const void *k1, const void *k2, void *ptr)
461 {
462 return memcmp(k1, k2, offsetof(struct device_prefix, pclass) -
463 offsetof(struct device_prefix, addr));
464 }
465
466 static void
467 interface_handle_subnet_route(struct interface *iface, struct device_addr *addr, bool add)
468 {
469 struct device *dev = iface->l3_dev.dev;
470 struct device_route *r = &addr->subnet;
471
472 if (addr->flags & DEVADDR_OFFLINK)
473 return;
474
475 if (!add) {
476 if (!addr->subnet.iface)
477 return;
478
479 system_del_route(dev, r);
480 memset(r, 0, sizeof(*r));
481 return;
482 }
483
484 r->iface = iface;
485 r->flags = addr->flags;
486 r->mask = addr->mask;
487 memcpy(&r->addr, &addr->addr, sizeof(r->addr));
488 clear_if_addr(&r->addr, r->mask);
489
490 if (!system_resolve_rt_proto("kernel", &r->proto))
491 return;
492
493 r->flags |= DEVROUTE_PROTO;
494 system_del_route(dev, r);
495
496 r->flags &= ~DEVROUTE_PROTO;
497 interface_set_route_info(iface, r);
498
499 system_add_route(dev, r);
500 }
501
502 static void
503 interface_add_addr_rules(struct device_addr *addr, bool enabled)
504 {
505 bool v6 = (addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6;
506
507 set_ip_source_policy(enabled, v6, IPRULE_PRIORITY_ADDR, &addr->addr,
508 (v6) ? 128 : 32, addr->policy_table, NULL, NULL,
509 true);
510 set_ip_source_policy(enabled, v6, IPRULE_PRIORITY_ADDR_MASK,
511 &addr->addr, addr->mask, addr->policy_table, NULL,
512 NULL, false);
513 }
514
515 static void
516 interface_update_proto_addr(struct vlist_tree *tree,
517 struct vlist_node *node_new,
518 struct vlist_node *node_old)
519 {
520 struct interface_ip_settings *ip;
521 struct interface *iface;
522 struct device *dev;
523 struct device_addr *a_new = NULL, *a_old = NULL;
524 bool replace = false;
525 bool keep = false;
526 bool v6 = false;
527
528 ip = container_of(tree, struct interface_ip_settings, addr);
529 iface = ip->iface;
530 dev = iface->l3_dev.dev;
531
532 if (!node_new || !node_old)
533 iface->updated |= IUF_ADDRESS;
534
535 if (node_new) {
536 a_new = container_of(node_new, struct device_addr, node);
537
538 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
539 !a_new->broadcast) {
540
541 /* /31 and /32 addressing need 255.255.255.255
542 * as broadcast address. */
543 if (a_new->mask >= 31) {
544 a_new->broadcast = (uint32_t) ~0;
545 } else {
546 uint32_t mask = ~0;
547 uint32_t *a = (uint32_t *) &a_new->addr;
548
549 mask >>= a_new->mask;
550 a_new->broadcast = *a | htonl(mask);
551 }
552 }
553 }
554
555 if (node_old)
556 a_old = container_of(node_old, struct device_addr, node);
557
558 if (a_new && a_old) {
559 keep = true;
560
561 if (a_old->flags != a_new->flags || a_old->failed)
562 keep = false;
563
564 if (a_old->valid_until != a_new->valid_until ||
565 a_old->preferred_until != a_new->preferred_until)
566 replace = true;
567
568 if (((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4) &&
569 (a_new->broadcast != a_old->broadcast ||
570 a_new->point_to_point != a_old->point_to_point))
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 bool
715 eui64_ifaceid(struct interface *iface, struct in6_addr *addr)
716 {
717 struct device_settings st;
718
719 device_merge_settings(iface->l3_dev.dev, &st);
720
721 if (!(st.flags & DEV_OPT_MACADDR))
722 return false;
723
724 /* get mac address */
725 uint8_t *macaddr = iface->l3_dev.dev->settings.macaddr;
726 uint8_t *ifaceid = addr->s6_addr + 8;
727 memcpy(ifaceid,macaddr,3);
728 memcpy(ifaceid + 5,macaddr + 3, 3);
729 ifaceid[3] = 0xff;
730 ifaceid[4] = 0xfe;
731 ifaceid[0] ^= 0x02;
732
733 return true;
734 }
735
736 static bool
737 generate_ifaceid(struct interface *iface, struct in6_addr *addr)
738 {
739 bool ret = true;
740
741 /* generate new iface id */
742 switch (iface->assignment_iface_id_selection) {
743 case IFID_FIXED:
744 /* fixed */
745 /* copy host part from assignment_fixed_iface_id */
746 memcpy(addr->s6_addr + 8, iface->assignment_fixed_iface_id.s6_addr + 8, 8);
747 break;
748 case IFID_RANDOM:
749 /* randomize last 64 bits */
750 random_ifaceid(addr);
751 break;
752 case IFID_EUI64:
753 /* eui64 */
754 ret = eui64_ifaceid(iface, addr);
755 break;
756 default:
757 ret = false;
758 break;
759 }
760 return ret;
761 }
762
763 static void
764 interface_set_prefix_address(struct device_prefix_assignment *assignment,
765 const struct device_prefix *prefix, struct interface *iface, bool add)
766 {
767 const struct interface *uplink = prefix->iface;
768 if (!iface->l3_dev.dev)
769 return;
770
771 struct device *l3_downlink = iface->l3_dev.dev;
772
773 struct device_addr addr;
774 struct device_route route;
775 memset(&addr, 0, sizeof(addr));
776 memset(&route, 0, sizeof(route));
777
778 addr.addr.in6 = assignment->addr;
779 addr.mask = assignment->length;
780 addr.flags = DEVADDR_INET6 | DEVADDR_OFFLINK;
781 addr.preferred_until = prefix->preferred_until;
782 addr.valid_until = prefix->valid_until;
783
784 route.flags = DEVADDR_INET6;
785 route.mask = addr.mask < 64 ? 64 : addr.mask;
786 route.addr = addr.addr;
787
788 if (!add && assignment->enabled) {
789 time_t now = system_get_rtime();
790
791 addr.preferred_until = now;
792 if (!addr.valid_until || addr.valid_until - now > 7200)
793 addr.valid_until = now + 7200;
794
795 if (iface->ip6table)
796 set_ip_source_policy(false, true, IPRULE_PRIORITY_ADDR_MASK, &addr.addr,
797 addr.mask < 64 ? 64 : addr.mask, iface->ip6table, NULL, NULL, false);
798
799 if (prefix->iface) {
800 if (prefix->iface->ip6table)
801 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW, &addr.addr,
802 addr.mask, prefix->iface->ip6table, iface, NULL, true);
803
804 set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT, &addr.addr,
805 addr.mask, 0, iface, "unreachable", true);
806 }
807
808 clear_if_addr(&route.addr, route.mask);
809 interface_set_route_info(iface, &route);
810
811 system_del_route(l3_downlink, &route);
812 system_add_address(l3_downlink, &addr);
813
814 assignment->addr = in6addr_any;
815 assignment->enabled = false;
816 } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP)) {
817 if (IN6_IS_ADDR_UNSPECIFIED(&addr.addr.in6)) {
818 addr.addr.in6 = prefix->addr;
819 addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
820 if (!generate_ifaceid(iface, &addr.addr.in6))
821 return;
822
823 assignment->addr = addr.addr.in6;
824 route.addr = addr.addr;
825 }
826
827 if (system_add_address(l3_downlink, &addr))
828 return;
829
830 if (!assignment->enabled) {
831 if (iface->ip6table)
832 set_ip_source_policy(true, true, IPRULE_PRIORITY_ADDR_MASK, &addr.addr,
833 addr.mask < 64 ? 64 : addr.mask, iface->ip6table, NULL, NULL, false);
834
835 if (prefix->iface) {
836 set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT, &addr.addr,
837 addr.mask, 0, iface, "unreachable", true);
838
839 if (prefix->iface->ip6table)
840 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW, &addr.addr,
841 addr.mask, prefix->iface->ip6table, iface, NULL, true);
842 }
843 }
844
845 clear_if_addr(&route.addr, route.mask);
846 interface_set_route_info(iface, &route);
847
848 system_add_route(l3_downlink, &route);
849
850 if (uplink && uplink->l3_dev.dev && !(l3_downlink->settings.flags & DEV_OPT_MTU6)) {
851 int mtu = system_update_ipv6_mtu(uplink->l3_dev.dev, 0);
852 int mtu_old = system_update_ipv6_mtu(l3_downlink, 0);
853
854 if (mtu > 0 && mtu_old > mtu)
855 system_update_ipv6_mtu(l3_downlink, mtu);
856 }
857
858 assignment->enabled = true;
859 }
860 }
861
862 static bool interface_prefix_assign(struct list_head *list,
863 struct device_prefix_assignment *assign)
864 {
865 int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
866 struct device_prefix_assignment *c;
867 list_for_each_entry(c, list, head) {
868 if (assign->assigned != -1) {
869 if (assign->assigned >= current && assign->assigned + asize < c->assigned) {
870 list_add_tail(&assign->head, &c->head);
871 return true;
872 }
873 } else if (assign->assigned == -1) {
874 current = (current + asize) & (~asize);
875 if (current + asize < c->assigned) {
876 assign->assigned = current;
877 list_add_tail(&assign->head, &c->head);
878 return true;
879 }
880 }
881 current = (c->assigned + (1 << (64 - c->length)));
882 }
883 return false;
884 }
885
886 /*
887 * Sorting of assignment entries:
888 * Primary on assignment length: smallest assignment first
889 * Secondary on assignment weight: highest weight first
890 * Finally alphabetical order of interface names
891 */
892 static int prefix_assignment_cmp(const void *k1, const void *k2, void *ptr)
893 {
894 const struct device_prefix_assignment *a1 = k1, *a2 = k2;
895
896 if (a1->length != a2->length)
897 return a1->length - a2->length;
898
899 if (a1->weight != a2->weight)
900 return a2->weight - a1->weight;
901
902 return strcmp(a1->name, a2->name);
903 }
904
905 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
906 {
907 struct device_prefix_assignment *c;
908 struct interface *iface;
909
910 // Delete all assignments
911 while (!list_empty(&prefix->assignments)) {
912 c = list_first_entry(&prefix->assignments,
913 struct device_prefix_assignment, head);
914 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
915 interface_set_prefix_address(c, prefix, iface, false);
916 list_del(&c->head);
917 free(c);
918 }
919
920 if (!setup)
921 return;
922
923 // End-of-assignment sentinel
924 c = malloc(sizeof(*c) + 1);
925 if (!c)
926 return;
927
928 c->assigned = 1 << (64 - prefix->length);
929 c->length = 64;
930 c->name[0] = 0;
931 c->addr = in6addr_any;
932 list_add(&c->head, &prefix->assignments);
933
934 // Excluded prefix
935 if (prefix->excl_length > 0) {
936 const char name[] = "!excluded";
937 c = malloc(sizeof(*c) + sizeof(name));
938 if (c) {
939 c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
940 ((1 << (64 - prefix->length)) - 1);
941 c->length = prefix->excl_length;
942 c->addr = in6addr_any;
943 memcpy(c->name, name, sizeof(name));
944 list_add(&c->head, &prefix->assignments);
945 }
946 }
947
948 bool assigned_any = false;
949 struct {
950 struct avl_node node;
951 } *entry, *n_entry;
952 struct avl_tree assign_later;
953
954 avl_init(&assign_later, prefix_assignment_cmp, false, NULL);
955
956 vlist_for_each_element(&interfaces, iface, node) {
957 if (iface->assignment_length < 48 ||
958 iface->assignment_length > 64)
959 continue;
960
961 // Test whether there is a matching class
962 if (!list_empty(&iface->assignment_classes)) {
963 bool found = false;
964
965 struct interface_assignment_class *c;
966 list_for_each_entry(c, &iface->assignment_classes, head) {
967 if (!strcmp(c->name, prefix->pclass)) {
968 found = true;
969 break;
970 }
971 }
972
973 if (!found)
974 continue;
975 }
976
977 size_t namelen = strlen(iface->name) + 1;
978 c = malloc(sizeof(*c) + namelen);
979 if (!c)
980 continue;
981
982 c->length = iface->assignment_length;
983 c->assigned = iface->assignment_hint;
984 c->weight = iface->assignment_weight;
985 c->addr = in6addr_any;
986 c->enabled = false;
987 memcpy(c->name, iface->name, namelen);
988
989 // First process all custom assignments, put all others in later-list
990 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
991 if (c->assigned != -1) {
992 c->assigned = -1;
993 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
994 "of size %hhu for %s, trying other\n", c->length, c->name);
995 }
996
997 entry = calloc(1, sizeof(*entry));
998 if (!entry)
999 continue;
1000
1001 entry->node.key = c;
1002 avl_insert(&assign_later, &entry->node);
1003 }
1004
1005 if (c->assigned != -1)
1006 assigned_any = true;
1007 }
1008
1009 /* Then try to assign all other + failed custom assignments */
1010 avl_for_each_element_safe(&assign_later, entry, node, n_entry) {
1011 bool assigned = false;
1012
1013 c = (struct device_prefix_assignment *)entry->node.key;
1014 avl_delete(&assign_later, &entry->node);
1015
1016 do {
1017 assigned = interface_prefix_assign(&prefix->assignments, c);
1018 } while (!assigned && ++c->length <= 64);
1019
1020 if (!assigned) {
1021 netifd_log_message(L_WARNING, "Failed to assign subprefix "
1022 "of size %hhu for %s\n", c->length, c->name);
1023 free(c);
1024 } else
1025 assigned_any = true;
1026
1027 free(entry);
1028 }
1029
1030 list_for_each_entry(c, &prefix->assignments, head)
1031 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
1032 interface_set_prefix_address(c, prefix, iface, true);
1033
1034 if (!assigned_any)
1035 netifd_log_message(L_WARNING, "You have delegated IPv6-prefixes but haven't assigned them "
1036 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
1037 }
1038
1039
1040 void interface_refresh_assignments(bool hint)
1041 {
1042 static bool refresh = false;
1043 if (!hint && refresh) {
1044 struct device_prefix *p;
1045 list_for_each_entry(p, &prefixes, head)
1046 interface_update_prefix_assignments(p, true);
1047 }
1048 refresh = hint;
1049 }
1050
1051
1052 static void
1053 interface_update_prefix(struct vlist_tree *tree,
1054 struct vlist_node *node_new,
1055 struct vlist_node *node_old)
1056 {
1057 struct device_prefix *prefix_old, *prefix_new;
1058 prefix_old = container_of(node_old, struct device_prefix, node);
1059 prefix_new = container_of(node_new, struct device_prefix, node);
1060
1061 struct interface_ip_settings *ip = container_of(tree, struct interface_ip_settings, prefix);
1062 if (tree && (!node_new || !node_old))
1063 ip->iface->updated |= IUF_PREFIX;
1064
1065 struct device_route route;
1066 memset(&route, 0, sizeof(route));
1067 route.flags = DEVADDR_INET6;
1068 route.metric = INT32_MAX;
1069 route.mask = (node_new) ? prefix_new->length : prefix_old->length;
1070 route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
1071
1072
1073 struct device_prefix_assignment *c;
1074 struct interface *iface;
1075
1076 if (node_old && node_new) {
1077 // Move assignments and refresh addresses to update valid times
1078 list_splice(&prefix_old->assignments, &prefix_new->assignments);
1079
1080 list_for_each_entry(c, &prefix_new->assignments, head)
1081 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
1082 interface_set_prefix_address(c, prefix_new, iface, true);
1083
1084 if (prefix_new->preferred_until != prefix_old->preferred_until ||
1085 prefix_new->valid_until != prefix_old->valid_until)
1086 ip->iface->updated |= IUF_PREFIX;
1087 } else if (node_new) {
1088 // Set null-route to avoid routing loops
1089 system_add_route(NULL, &route);
1090
1091 if (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation)
1092 interface_update_prefix_assignments(prefix_new, true);
1093 } else if (node_old) {
1094 // Remove null-route
1095 interface_update_prefix_assignments(prefix_old, false);
1096 system_del_route(NULL, &route);
1097 }
1098
1099 if (node_old) {
1100 if (prefix_old->head.next)
1101 list_del(&prefix_old->head);
1102 free(prefix_old);
1103 }
1104
1105 if (node_new && (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation))
1106 list_add(&prefix_new->head, &prefixes);
1107
1108 }
1109
1110 struct device_prefix*
1111 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
1112 uint8_t length, time_t valid_until, time_t preferred_until,
1113 struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
1114 {
1115 if (!pclass)
1116 pclass = (iface) ? iface->name : "local";
1117
1118 struct device_prefix *prefix = calloc(1, sizeof(*prefix) + strlen(pclass) + 1);
1119 if (!prefix)
1120 return NULL;
1121
1122 prefix->length = length;
1123 prefix->addr = *addr;
1124 prefix->preferred_until = preferred_until;
1125 prefix->valid_until = valid_until;
1126 prefix->iface = iface;
1127 INIT_LIST_HEAD(&prefix->assignments);
1128
1129 if (excl_addr) {
1130 prefix->excl_addr = *excl_addr;
1131 prefix->excl_length = excl_length;
1132 }
1133
1134 strcpy(prefix->pclass, pclass);
1135
1136 if (iface)
1137 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
1138 else
1139 interface_update_prefix(NULL, &prefix->node, NULL);
1140
1141 return prefix;
1142 }
1143
1144 void
1145 interface_ip_set_ula_prefix(const char *prefix)
1146 {
1147 char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
1148 if (prefix)
1149 strncpy(buf, prefix, sizeof(buf) - 1);
1150 char *prefixaddr = strtok_r(buf, "/", &saveptr);
1151
1152 struct in6_addr addr;
1153 if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
1154 if (ula_prefix) {
1155 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1156 ula_prefix = NULL;
1157 }
1158 return;
1159 }
1160
1161 int length;
1162 char *prefixlen = strtok_r(NULL, ",", &saveptr);
1163 if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
1164 return;
1165
1166 if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
1167 ula_prefix->length != length) {
1168 if (ula_prefix)
1169 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1170
1171 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
1172 0, 0, NULL, 0, NULL);
1173 }
1174 }
1175
1176 void
1177 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
1178 {
1179 struct dns_server *s;
1180
1181 s = calloc(1, sizeof(*s));
1182 if (!s)
1183 return;
1184
1185 s->af = AF_INET;
1186 if (inet_pton(s->af, str, &s->addr.in))
1187 goto add;
1188
1189 s->af = AF_INET6;
1190 if (inet_pton(s->af, str, &s->addr.in))
1191 goto add;
1192
1193 free(s);
1194 return;
1195
1196 add:
1197 D(INTERFACE, "Add IPv%c DNS server: %s\n",
1198 s->af == AF_INET6 ? '6' : '4', str);
1199 vlist_simple_add(&ip->dns_servers, &s->node);
1200 }
1201
1202 void
1203 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
1204 {
1205 struct blob_attr *cur;
1206 int rem;
1207
1208 blobmsg_for_each_attr(cur, list, rem) {
1209 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1210 continue;
1211
1212 if (!blobmsg_check_attr(cur, NULL))
1213 continue;
1214
1215 interface_add_dns_server(ip, blobmsg_data(cur));
1216 }
1217 }
1218
1219 static void
1220 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
1221 {
1222 struct dns_search_domain *s;
1223 int len = strlen(str);
1224
1225 s = calloc(1, sizeof(*s) + len + 1);
1226 if (!s)
1227 return;
1228
1229 D(INTERFACE, "Add DNS search domain: %s\n", str);
1230 memcpy(s->name, str, len);
1231 vlist_simple_add(&ip->dns_search, &s->node);
1232 }
1233
1234 void
1235 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
1236 {
1237 struct blob_attr *cur;
1238 int rem;
1239
1240 blobmsg_for_each_attr(cur, list, rem) {
1241 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1242 continue;
1243
1244 if (!blobmsg_check_attr(cur, NULL))
1245 continue;
1246
1247 interface_add_dns_search_domain(ip, blobmsg_data(cur));
1248 }
1249 }
1250
1251 static void
1252 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip, const char *dev)
1253 {
1254 struct dns_server *s;
1255 struct dns_search_domain *d;
1256 const char *str;
1257 char buf[INET6_ADDRSTRLEN];
1258
1259 vlist_simple_for_each_element(&ip->dns_servers, s, node) {
1260 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
1261 if (!str)
1262 continue;
1263
1264 if (s->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&s->addr.in6))
1265 fprintf(f, "nameserver %s%%%s\n", str, dev);
1266 else
1267 fprintf(f, "nameserver %s\n", str);
1268 }
1269
1270 vlist_simple_for_each_element(&ip->dns_search, d, node) {
1271 fprintf(f, "search %s\n", d->name);
1272 }
1273 }
1274
1275 /* Sorting of interface resolver entries : */
1276 /* Primary on interface dns_metric : lowest metric first */
1277 /* Secondary on interface metric : lowest metric first */
1278 /* Finally alphabetical order of interface names */
1279 static int resolv_conf_iface_cmp(const void *k1, const void *k2, void *ptr)
1280 {
1281 const struct interface *iface1 = k1, *iface2 = k2;
1282
1283 if (iface1->dns_metric != iface2->dns_metric)
1284 return iface1->dns_metric - iface2->dns_metric;
1285
1286 if (iface1->metric != iface2->metric)
1287 return iface1->metric - iface2->metric;
1288
1289 return strcmp(iface1->name, iface2->name);
1290 }
1291
1292 static void
1293 __interface_write_dns_entries(FILE *f)
1294 {
1295 struct interface *iface;
1296 struct {
1297 struct avl_node node;
1298 } *entry, *n_entry;
1299 struct avl_tree resolv_conf_iface_entries;
1300
1301 avl_init(&resolv_conf_iface_entries, resolv_conf_iface_cmp, false, NULL);
1302
1303 vlist_for_each_element(&interfaces, iface, node) {
1304 if (iface->state != IFS_UP)
1305 continue;
1306
1307 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
1308 vlist_simple_empty(&iface->proto_ip.dns_servers) &&
1309 vlist_simple_empty(&iface->config_ip.dns_search) &&
1310 vlist_simple_empty(&iface->config_ip.dns_servers))
1311 continue;
1312
1313 entry = calloc(1, sizeof(*entry));
1314 if (!entry)
1315 continue;
1316
1317 entry->node.key = iface;
1318 avl_insert(&resolv_conf_iface_entries, &entry->node);
1319 }
1320
1321 avl_for_each_element(&resolv_conf_iface_entries, entry, node) {
1322 iface = (struct interface *)entry->node.key;
1323 struct device *dev = iface->l3_dev.dev;
1324
1325 fprintf(f, "# Interface %s\n", iface->name);
1326
1327 write_resolv_conf_entries(f, &iface->config_ip, dev->ifname);
1328
1329 if (!iface->proto_ip.no_dns)
1330 write_resolv_conf_entries(f, &iface->proto_ip, dev->ifname);
1331 }
1332
1333 avl_remove_all_elements(&resolv_conf_iface_entries, entry, node, n_entry)
1334 free(entry);
1335 }
1336
1337 void
1338 interface_write_resolv_conf(void)
1339 {
1340 char *path = alloca(strlen(resolv_conf) + 5);
1341 FILE *f;
1342 uint32_t crcold, crcnew;
1343
1344 sprintf(path, "%s.tmp", resolv_conf);
1345 unlink(path);
1346 f = fopen(path, "w+");
1347 if (!f) {
1348 D(INTERFACE, "Failed to open %s for writing\n", path);
1349 return;
1350 }
1351
1352 __interface_write_dns_entries(f);
1353
1354 fflush(f);
1355 rewind(f);
1356 crcnew = crc32_file(f);
1357 fclose(f);
1358
1359 crcold = crcnew + 1;
1360 f = fopen(resolv_conf, "r");
1361 if (f) {
1362 crcold = crc32_file(f);
1363 fclose(f);
1364 }
1365
1366 if (crcold == crcnew) {
1367 unlink(path);
1368 } else if (rename(path, resolv_conf) < 0) {
1369 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
1370 unlink(path);
1371 }
1372 }
1373
1374 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
1375 {
1376 struct device_addr *addr;
1377 struct device_route *route;
1378 struct device *dev;
1379 struct interface *iface;
1380
1381 ip->enabled = enabled;
1382 iface = ip->iface;
1383 dev = iface->l3_dev.dev;
1384 if (!dev)
1385 return;
1386
1387 vlist_for_each_element(&ip->addr, addr, node) {
1388 bool v6 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6) ? true : false;
1389
1390 if (addr->flags & DEVADDR_EXTERNAL)
1391 continue;
1392
1393 if (addr->enabled == enabled)
1394 continue;
1395
1396 if (enabled) {
1397 system_add_address(dev, addr);
1398
1399 addr->policy_table = (v6) ? iface->ip6table : iface->ip4table;
1400 if (iface->metric || addr->policy_table)
1401 interface_handle_subnet_route(iface, addr, true);
1402
1403 if (addr->policy_table)
1404 interface_add_addr_rules(addr, true);
1405 } else {
1406 interface_handle_subnet_route(iface, addr, false);
1407 system_del_address(dev, addr);
1408
1409 if (addr->policy_table)
1410 interface_add_addr_rules(addr, false);
1411 }
1412 addr->enabled = enabled;
1413 }
1414
1415 vlist_for_each_element(&ip->route, route, node) {
1416 bool _enabled = enabled;
1417
1418 if (route->flags & DEVADDR_EXTERNAL)
1419 continue;
1420
1421 if (!enable_route(ip, route))
1422 _enabled = false;
1423
1424 if (route->enabled == _enabled)
1425 continue;
1426
1427 if (_enabled) {
1428 interface_set_route_info(ip->iface, route);
1429
1430 if (system_add_route(dev, route))
1431 route->failed = true;
1432 } else
1433 system_del_route(dev, route);
1434 route->enabled = _enabled;
1435 }
1436
1437 struct device_prefix *c;
1438 struct device_prefix_assignment *a;
1439 list_for_each_entry(c, &prefixes, head)
1440 list_for_each_entry(a, &c->assignments, head)
1441 if (!strcmp(a->name, ip->iface->name))
1442 interface_set_prefix_address(a, c, ip->iface, enabled);
1443
1444 if (ip->iface && ip->iface->policy_rules_set != enabled &&
1445 ip->iface->l3_dev.dev) {
1446 set_ip_lo_policy(enabled, true, ip->iface);
1447 set_ip_lo_policy(enabled, false, ip->iface);
1448
1449 set_ip_source_policy(enabled, true, IPRULE_PRIORITY_REJECT + ip->iface->l3_dev.dev->ifindex,
1450 NULL, 0, 0, ip->iface, "failed_policy", true);
1451 ip->iface->policy_rules_set = enabled;
1452 }
1453 }
1454
1455 void
1456 interface_ip_update_start(struct interface_ip_settings *ip)
1457 {
1458 if (ip != &ip->iface->config_ip) {
1459 vlist_simple_update(&ip->dns_servers);
1460 vlist_simple_update(&ip->dns_search);
1461 }
1462 vlist_update(&ip->route);
1463 vlist_update(&ip->addr);
1464 vlist_update(&ip->prefix);
1465 }
1466
1467 void
1468 interface_ip_update_complete(struct interface_ip_settings *ip)
1469 {
1470 vlist_simple_flush(&ip->dns_servers);
1471 vlist_simple_flush(&ip->dns_search);
1472 vlist_flush(&ip->route);
1473 vlist_flush(&ip->addr);
1474 vlist_flush(&ip->prefix);
1475 interface_write_resolv_conf();
1476 }
1477
1478 void
1479 interface_ip_flush(struct interface_ip_settings *ip)
1480 {
1481 if (ip == &ip->iface->proto_ip)
1482 vlist_flush_all(&ip->iface->host_routes);
1483 vlist_simple_flush_all(&ip->dns_servers);
1484 vlist_simple_flush_all(&ip->dns_search);
1485 vlist_flush_all(&ip->route);
1486 vlist_flush_all(&ip->addr);
1487 vlist_flush_all(&ip->prefix);
1488 }
1489
1490 static void
1491 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1492 {
1493 ip->iface = iface;
1494 ip->enabled = true;
1495 vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1496 vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1497 vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1498 vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1499 vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1500 }
1501
1502 void
1503 interface_ip_init(struct interface *iface)
1504 {
1505 __interface_ip_init(&iface->proto_ip, iface);
1506 __interface_ip_init(&iface->config_ip, iface);
1507 vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1508 }
1509
1510 static void
1511 interface_ip_valid_until_handler(struct uloop_timeout *t)
1512 {
1513 time_t now = system_get_rtime();
1514 struct interface *iface;
1515 vlist_for_each_element(&interfaces, iface, node) {
1516 if (iface->state != IFS_UP)
1517 continue;
1518
1519 struct device_addr *addr, *addrp;
1520 struct device_route *route, *routep;
1521 struct device_prefix *pref, *prefp;
1522
1523 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1524 if (addr->valid_until && addr->valid_until < now)
1525 vlist_delete(&iface->proto_ip.addr, &addr->node);
1526
1527 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1528 if (route->valid_until && route->valid_until < now)
1529 vlist_delete(&iface->proto_ip.route, &route->node);
1530
1531 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1532 if (pref->valid_until && pref->valid_until < now)
1533 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1534
1535 }
1536
1537 uloop_timeout_set(t, 1000);
1538 }
1539
1540 static void __init
1541 interface_ip_init_worker(void)
1542 {
1543 valid_until_timeout.cb = interface_ip_valid_until_handler;
1544 uloop_timeout_set(&valid_until_timeout, 1000);
1545 }
OpenWrt Network interface configuration daemon