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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 union if_addr addr_zero;
233 int addrsize = v6 ? sizeof(addr->in6) : sizeof(addr->in);
234
235 memset(&addr_zero, 0, sizeof(addr_zero));
236 if (memcmp(&addr_zero, addr, addrsize) == 0)
237 defaultroute_target = true;
238
239 if (iface) {
240 /* look for locally addressable target first */
241 if (interface_ip_find_addr_target(iface, addr, v6))
242 return iface;
243
244 /* do not stop at the first route, let the lookup compare
245 * masks to find the best match */
246 interface_ip_find_route_target(iface, addr, v6, &r_next);
247 } else {
248 vlist_for_each_element(&interfaces, iface, node) {
249 /* look for locally addressable target first */
250 if (interface_ip_find_addr_target(iface, addr, v6))
251 return iface;
252
253 /* do not stop at the first route, let the lookup compare
254 * masks to find the best match */
255 interface_ip_find_route_target(iface, addr, v6, &r_next);
256 }
257 }
258
259 if (!r_next)
260 return NULL;
261
262 iface = r_next->iface;
263 if (defaultroute_target)
264 return iface;
265
266 route = calloc(1, sizeof(*route));
267 if (!route)
268 return NULL;
269
270 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
271 route->mask = v6 ? 128 : 32;
272 memcpy(&route->addr, addr, addrsize);
273 memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
274 route->mtu = r_next->mtu;
275 route->metric = r_next->metric;
276 route->table = r_next->table;
277 route->iface = iface;
278 vlist_add(&iface->host_routes, &route->node, route);
279
280 return iface;
281 }
282
283 static void
284 interface_set_route_info(struct interface *iface, struct device_route *route)
285 {
286 bool v6 = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6);
287
288 if (!iface)
289 return;
290
291 if (!(route->flags & DEVROUTE_METRIC))
292 route->metric = iface->metric;
293
294 if (!(route->flags & DEVROUTE_TABLE)) {
295 route->table = (v6) ? iface->ip6table : iface->ip4table;
296 if (route->table)
297 route->flags |= DEVROUTE_SRCTABLE;
298 }
299 }
300
301 void
302 interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
303 {
304 struct interface_ip_settings *ip;
305 struct blob_attr *tb[__ROUTE_MAX], *cur;
306 struct device_route *route;
307 int af = v6 ? AF_INET6 : AF_INET;
308
309 blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
310
311 if (!iface) {
312 if ((cur = tb[ROUTE_INTERFACE]) == NULL)
313 return;
314
315 iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
316 if (!iface)
317 return;
318
319 ip = &iface->config_ip;
320 } else {
321 ip = &iface->proto_ip;
322 }
323
324 route = calloc(1, sizeof(*route));
325 if (!route)
326 return;
327
328 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
329 route->mask = v6 ? 128 : 32;
330 if ((cur = tb[ROUTE_MASK]) != NULL) {
331 route->mask = parse_netmask_string(blobmsg_data(cur), v6);
332 if (route->mask > (v6 ? 128 : 32))
333 goto error;
334 }
335
336 if ((cur = tb[ROUTE_TARGET]) != NULL) {
337 if (!parse_ip_and_netmask(af, blobmsg_data(cur), &route->addr, &route->mask)) {
338 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
339 goto error;
340 }
341 }
342
343 if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
344 if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
345 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
346 goto error;
347 }
348 }
349
350 if ((cur = tb[ROUTE_METRIC]) != NULL) {
351 route->metric = blobmsg_get_u32(cur);
352 route->flags |= DEVROUTE_METRIC;
353 }
354
355 if ((cur = tb[ROUTE_MTU]) != NULL) {
356 route->mtu = blobmsg_get_u32(cur);
357 route->flags |= DEVROUTE_MTU;
358 }
359
360 // Use source-based routing
361 if ((cur = tb[ROUTE_SOURCE]) != NULL) {
362 char *saveptr, *source = alloca(blobmsg_data_len(cur));
363 memcpy(source, blobmsg_data(cur), blobmsg_data_len(cur));
364
365 const char *addr = strtok_r(source, "/", &saveptr);
366 const char *mask = strtok_r(NULL, "/", &saveptr);
367
368 if (!addr || inet_pton(af, addr, &route->source) < 1) {
369 DPRINTF("Failed to parse route source: %s\n", addr ? addr : "NULL");
370 goto error;
371 }
372
373 route->sourcemask = (mask) ? atoi(mask) : ((af == AF_INET6) ? 128 : 32);
374 }
375
376 if ((cur = tb[ROUTE_ONLINK]) != NULL && blobmsg_get_bool(cur))
377 route->flags |= DEVROUTE_ONLINK;
378
379 if ((cur = tb[ROUTE_TABLE]) != NULL) {
380 if (!system_resolve_rt_table(blobmsg_data(cur), &route->table)) {
381 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
382 goto error;
383 }
384
385 /* only set the table flag if not using the main (default) table */
386 if (system_is_default_rt_table(route->table))
387 route->table = 0;
388
389 if (route->table)
390 route->flags |= DEVROUTE_TABLE;
391 }
392
393 if ((cur = tb[ROUTE_VALID]) != NULL) {
394 int64_t valid = blobmsg_get_u32(cur);
395 int64_t valid_until = valid + (int64_t)system_get_rtime();
396 if (valid_until <= LONG_MAX && valid != 0xffffffffLL) // Catch overflow
397 route->valid_until = valid_until;
398 }
399
400 if ((cur = tb[ROUTE_TYPE]) != NULL) {
401 if (!system_resolve_rt_type(blobmsg_data(cur), &route->type)) {
402 DPRINTF("Failed to resolve routing type: %s\n", (char *) blobmsg_data(cur));
403 goto error;
404 }
405 route->flags |= DEVROUTE_TYPE;
406 }
407
408 if ((cur = tb[ROUTE_PROTO]) != NULL) {
409 if (!system_resolve_rt_proto(blobmsg_data(cur), &route->proto)) {
410 DPRINTF("Failed to resolve proto type: %s\n", (char *) blobmsg_data(cur));
411 goto error;
412 }
413 route->flags |= DEVROUTE_PROTO;
414 }
415
416 interface_set_route_info(iface, route);
417 vlist_add(&ip->route, &route->node, route);
418 return;
419
420 error:
421 free(route);
422 }
423
424 static int
425 addr_cmp(const void *k1, const void *k2, void *ptr)
426 {
427 return memcmp(k1, k2, sizeof(struct device_addr) -
428 offsetof(struct device_addr, flags));
429 }
430
431 static int
432 route_cmp(const void *k1, const void *k2, void *ptr)
433 {
434 const struct device_route *r1 = k1, *r2 = k2;
435
436 if (r1->mask != r2->mask)
437 return r2->mask - r1->mask;
438
439 if (r1->metric != r2->metric)
440 return r1->metric - r2->metric;
441
442 if (r1->flags != r2->flags)
443 return r2->flags - r1->flags;
444
445 if (r1->sourcemask != r2->sourcemask)
446 return r1->sourcemask - r2->sourcemask;
447
448 if (r1->table != r2->table)
449 return r1->table - r2->table;
450
451 int maskcmp = memcmp(&r1->source, &r2->source, sizeof(r1->source));
452 if (maskcmp)
453 return maskcmp;
454
455 return memcmp(&r1->addr, &r2->addr, sizeof(r1->addr));
456 }
457
458 static int
459 prefix_cmp(const void *k1, const void *k2, void *ptr)
460 {
461 return memcmp(k1, k2, offsetof(struct device_prefix, pclass) -
462 offsetof(struct device_prefix, addr));
463 }
464
465 static void
466 interface_handle_subnet_route(struct interface *iface, struct device_addr *addr, bool add)
467 {
468 struct device *dev = iface->l3_dev.dev;
469 struct device_route *r = &addr->subnet;
470
471 if (addr->flags & DEVADDR_OFFLINK)
472 return;
473
474 if (!add) {
475 if (!addr->subnet.iface)
476 return;
477
478 system_del_route(dev, r);
479 memset(r, 0, sizeof(*r));
480 return;
481 }
482
483 r->iface = iface;
484 r->flags = addr->flags;
485 r->mask = addr->mask;
486 memcpy(&r->addr, &addr->addr, sizeof(r->addr));
487 clear_if_addr(&r->addr, r->mask);
488
489 if (!system_resolve_rt_proto("kernel", &r->proto))
490 return;
491
492 r->flags |= DEVROUTE_PROTO;
493 system_del_route(dev, r);
494
495 r->flags &= ~DEVROUTE_PROTO;
496 interface_set_route_info(iface, r);
497
498 system_add_route(dev, r);
499 }
500
501 static void
502 interface_add_addr_rules(struct device_addr *addr, bool enabled)
503 {
504 bool v6 = (addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6;
505
506 set_ip_source_policy(enabled, v6, IPRULE_PRIORITY_ADDR, &addr->addr,
507 (v6) ? 128 : 32, addr->policy_table, NULL, NULL,
508 true);
509 set_ip_source_policy(enabled, v6, IPRULE_PRIORITY_ADDR_MASK,
510 &addr->addr, addr->mask, addr->policy_table, NULL,
511 NULL, false);
512 }
513
514 static void
515 interface_update_proto_addr(struct vlist_tree *tree,
516 struct vlist_node *node_new,
517 struct vlist_node *node_old)
518 {
519 struct interface_ip_settings *ip;
520 struct interface *iface;
521 struct device *dev;
522 struct device_addr *a_new = NULL, *a_old = NULL;
523 bool replace = false;
524 bool keep = false;
525 bool v6 = false;
526
527 ip = container_of(tree, struct interface_ip_settings, addr);
528 iface = ip->iface;
529 dev = iface->l3_dev.dev;
530
531 if (!node_new || !node_old)
532 iface->updated |= IUF_ADDRESS;
533
534 if (node_new) {
535 a_new = container_of(node_new, struct device_addr, node);
536
537 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
538 !a_new->broadcast) {
539
540 /* /31 and /32 addressing need 255.255.255.255
541 * as broadcast address. */
542 if (a_new->mask >= 31) {
543 a_new->broadcast = (uint32_t) ~0;
544 } else {
545 uint32_t mask = ~0;
546 uint32_t *a = (uint32_t *) &a_new->addr;
547
548 mask >>= a_new->mask;
549 a_new->broadcast = *a | htonl(mask);
550 }
551 }
552 }
553
554 if (node_old)
555 a_old = container_of(node_old, struct device_addr, node);
556
557 if (a_new && a_old) {
558 keep = true;
559
560 if (a_old->flags != a_new->flags || a_old->failed)
561 keep = false;
562
563 if (a_old->valid_until != a_new->valid_until ||
564 a_old->preferred_until != a_new->preferred_until)
565 replace = true;
566
567 if (((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4) &&
568 (a_new->broadcast != a_old->broadcast ||
569 a_new->point_to_point != a_old->point_to_point))
570 keep = false;
571 }
572
573 if (node_old) {
574 if (a_old->enabled && !keep) {
575 //This is needed for source routing to work correctly. If a device
576 //has two connections to a network using the same subnet, adding
577 //only the network-rule will cause packets to be routed through the
578 //first matching network (source IP matches both masks).
579 if (a_old->policy_table)
580 interface_add_addr_rules(a_old, false);
581
582 if (!(a_old->flags & DEVADDR_EXTERNAL)) {
583 interface_handle_subnet_route(iface, a_old, false);
584 system_del_address(dev, a_old);
585 }
586 }
587 free(a_old->pclass);
588 free(a_old);
589 }
590
591 if (node_new) {
592 a_new->enabled = true;
593
594 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
595 v6 = true;
596
597 a_new->policy_table = (v6) ? iface->ip6table : iface->ip4table;
598
599 if (!keep || replace) {
600 if (!(a_new->flags & DEVADDR_EXTERNAL)) {
601 if (system_add_address(dev, a_new))
602 a_new->failed = true;
603
604 if (iface->metric || a_new->policy_table)
605 interface_handle_subnet_route(iface, a_new, true);
606 }
607
608 if (!keep) {
609 if (a_new->policy_table)
610 interface_add_addr_rules(a_new, true);
611 }
612 }
613 }
614 }
615
616 static bool
617 enable_route(struct interface_ip_settings *ip, struct device_route *route)
618 {
619 if (ip->no_defaultroute && !route->mask)
620 return false;
621
622 return ip->enabled;
623 }
624
625 static void
626 interface_update_proto_route(struct vlist_tree *tree,
627 struct vlist_node *node_new,
628 struct vlist_node *node_old)
629 {
630 struct interface_ip_settings *ip;
631 struct interface *iface;
632 struct device *dev;
633 struct device_route *route_old, *route_new;
634 bool keep = false;
635
636 ip = container_of(tree, struct interface_ip_settings, route);
637 iface = ip->iface;
638 dev = iface->l3_dev.dev;
639
640 if (!node_new || !node_old)
641 iface->updated |= IUF_ROUTE;
642
643 route_old = container_of(node_old, struct device_route, node);
644 route_new = container_of(node_new, struct device_route, node);
645
646 if (node_old && node_new)
647 keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop)) &&
648 (route_old->mtu == route_new->mtu) && (route_old->type == route_new->type) &&
649 (route_old->proto == route_new->proto) && !route_old->failed;
650
651 if (node_old) {
652 if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
653 system_del_route(dev, route_old);
654
655 free(route_old);
656 }
657
658 if (node_new) {
659 bool _enabled = enable_route(ip, route_new);
660
661 if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
662 if (system_add_route(dev, route_new))
663 route_new->failed = true;
664
665 route_new->iface = iface;
666 route_new->enabled = _enabled;
667 }
668 }
669
670 static void
671 interface_update_host_route(struct vlist_tree *tree,
672 struct vlist_node *node_new,
673 struct vlist_node *node_old)
674 {
675 struct interface *iface;
676 struct device *dev;
677 struct device_route *route_old, *route_new;
678
679 iface = container_of(tree, struct interface, host_routes);
680 dev = iface->l3_dev.dev;
681
682 route_old = container_of(node_old, struct device_route, node);
683 route_new = container_of(node_new, struct device_route, node);
684
685 if (node_old) {
686 system_del_route(dev, route_old);
687 free(route_old);
688 }
689
690 if (node_new) {
691 if (system_add_route(dev, route_new))
692 route_new->failed = true;
693 }
694 }
695
696 static void
697 random_ifaceid(struct in6_addr *addr)
698 {
699 static bool initialized = false;
700 struct timeval t;
701
702 if (!initialized) {
703 long int seed = 0;
704 gettimeofday(&t, NULL);
705 seed = t.tv_sec ^ t.tv_usec ^ getpid();
706 srand48(seed);
707 initialized = true;
708 }
709 addr->s6_addr32[2] = (uint32_t)mrand48();
710 addr->s6_addr32[3] = (uint32_t)mrand48();
711 }
712
713 static bool
714 eui64_ifaceid(struct interface *iface, struct in6_addr *addr)
715 {
716 struct device_settings st;
717
718 device_merge_settings(iface->l3_dev.dev, &st);
719
720 if (!(st.flags & DEV_OPT_MACADDR))
721 return false;
722
723 /* get mac address */
724 uint8_t *ifaceid = addr->s6_addr + 8;
725 memcpy(ifaceid, st.macaddr, 3);
726 memcpy(ifaceid + 5, st.macaddr + 3, 3);
727 ifaceid[3] = 0xff;
728 ifaceid[4] = 0xfe;
729 ifaceid[0] ^= 0x02;
730
731 return true;
732 }
733
734 static bool
735 generate_ifaceid(struct interface *iface, struct in6_addr *addr)
736 {
737 bool ret = true;
738
739 /* generate new iface id */
740 switch (iface->assignment_iface_id_selection) {
741 case IFID_FIXED:
742 /* fixed */
743 /* copy host part from assignment_fixed_iface_id */
744 memcpy(addr->s6_addr + 8, iface->assignment_fixed_iface_id.s6_addr + 8, 8);
745 break;
746 case IFID_RANDOM:
747 /* randomize last 64 bits */
748 random_ifaceid(addr);
749 break;
750 case IFID_EUI64:
751 /* eui64 */
752 ret = eui64_ifaceid(iface, addr);
753 break;
754 default:
755 ret = false;
756 break;
757 }
758 return ret;
759 }
760
761 static void
762 interface_set_prefix_address(struct device_prefix_assignment *assignment,
763 const struct device_prefix *prefix, struct interface *iface, bool add)
764 {
765 const struct interface *uplink = prefix->iface;
766 if (!iface->l3_dev.dev)
767 return;
768
769 struct device *l3_downlink = iface->l3_dev.dev;
770
771 struct device_addr addr;
772 struct device_route route;
773 memset(&addr, 0, sizeof(addr));
774 memset(&route, 0, sizeof(route));
775
776 addr.addr.in6 = assignment->addr;
777 addr.mask = assignment->length;
778 addr.flags = DEVADDR_INET6 | DEVADDR_OFFLINK;
779 addr.preferred_until = prefix->preferred_until;
780 addr.valid_until = prefix->valid_until;
781
782 route.flags = DEVADDR_INET6;
783 route.mask = addr.mask < 64 ? 64 : addr.mask;
784 route.addr = addr.addr;
785
786 if (!add && assignment->enabled) {
787 time_t now = system_get_rtime();
788
789 addr.preferred_until = now;
790 if (!addr.valid_until || addr.valid_until - now > 7200)
791 addr.valid_until = now + 7200;
792
793 if (iface->ip6table)
794 set_ip_source_policy(false, true, IPRULE_PRIORITY_ADDR_MASK, &addr.addr,
795 addr.mask < 64 ? 64 : addr.mask, iface->ip6table, NULL, NULL, false);
796
797 if (prefix->iface) {
798 if (prefix->iface->ip6table)
799 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW, &addr.addr,
800 addr.mask, prefix->iface->ip6table, iface, NULL, true);
801
802 set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT, &addr.addr,
803 addr.mask, 0, iface, "unreachable", true);
804 }
805
806 clear_if_addr(&route.addr, route.mask);
807 interface_set_route_info(iface, &route);
808
809 system_del_route(l3_downlink, &route);
810 system_add_address(l3_downlink, &addr);
811
812 assignment->addr = in6addr_any;
813 assignment->enabled = false;
814 } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP)) {
815 if (IN6_IS_ADDR_UNSPECIFIED(&addr.addr.in6)) {
816 addr.addr.in6 = prefix->addr;
817 addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
818 if (!generate_ifaceid(iface, &addr.addr.in6))
819 return;
820
821 assignment->addr = addr.addr.in6;
822 route.addr = addr.addr;
823 }
824
825 if (system_add_address(l3_downlink, &addr))
826 return;
827
828 if (!assignment->enabled) {
829 if (iface->ip6table)
830 set_ip_source_policy(true, true, IPRULE_PRIORITY_ADDR_MASK, &addr.addr,
831 addr.mask < 64 ? 64 : addr.mask, iface->ip6table, NULL, NULL, false);
832
833 if (prefix->iface) {
834 set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT, &addr.addr,
835 addr.mask, 0, iface, "unreachable", true);
836
837 if (prefix->iface->ip6table)
838 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW, &addr.addr,
839 addr.mask, prefix->iface->ip6table, iface, NULL, true);
840 }
841 }
842
843 clear_if_addr(&route.addr, route.mask);
844 interface_set_route_info(iface, &route);
845
846 system_add_route(l3_downlink, &route);
847
848 if (uplink && uplink->l3_dev.dev && !(l3_downlink->settings.flags & DEV_OPT_MTU6)) {
849 int mtu = system_update_ipv6_mtu(uplink->l3_dev.dev, 0);
850 int mtu_old = system_update_ipv6_mtu(l3_downlink, 0);
851
852 if (mtu > 0 && mtu_old != mtu) {
853 if (system_update_ipv6_mtu(l3_downlink, mtu) < 0)
854 netifd_log_message(L_WARNING, "Failed to set IPv6 mtu to %d"
855 "on interface '%s'\n", mtu, iface->name);
856 }
857 }
858
859 assignment->enabled = true;
860 }
861 }
862
863 static bool interface_prefix_assign(struct list_head *list,
864 struct device_prefix_assignment *assign)
865 {
866 int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
867 struct device_prefix_assignment *c;
868 list_for_each_entry(c, list, head) {
869 if (assign->assigned != -1) {
870 if (assign->assigned >= current && assign->assigned + asize < c->assigned) {
871 list_add_tail(&assign->head, &c->head);
872 return true;
873 }
874 } else if (assign->assigned == -1) {
875 current = (current + asize) & (~asize);
876 if (current + asize < c->assigned) {
877 assign->assigned = current;
878 list_add_tail(&assign->head, &c->head);
879 return true;
880 }
881 }
882 current = (c->assigned + (1 << (64 - c->length)));
883 }
884 return false;
885 }
886
887 /*
888 * Sorting of assignment entries:
889 * Primary on assignment length: smallest assignment first
890 * Secondary on assignment weight: highest weight first
891 * Finally alphabetical order of interface names
892 */
893 static int prefix_assignment_cmp(const void *k1, const void *k2, void *ptr)
894 {
895 const struct device_prefix_assignment *a1 = k1, *a2 = k2;
896
897 if (a1->length != a2->length)
898 return a1->length - a2->length;
899
900 if (a1->weight != a2->weight)
901 return a2->weight - a1->weight;
902
903 return strcmp(a1->name, a2->name);
904 }
905
906 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
907 {
908 struct device_prefix_assignment *c;
909 struct interface *iface;
910
911 // Delete all assignments
912 while (!list_empty(&prefix->assignments)) {
913 c = list_first_entry(&prefix->assignments,
914 struct device_prefix_assignment, head);
915 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
916 interface_set_prefix_address(c, prefix, iface, false);
917 list_del(&c->head);
918 free(c);
919 }
920
921 if (!setup)
922 return;
923
924 // End-of-assignment sentinel
925 c = malloc(sizeof(*c) + 1);
926 if (!c)
927 return;
928
929 c->assigned = 1 << (64 - prefix->length);
930 c->length = 64;
931 c->name[0] = 0;
932 c->addr = in6addr_any;
933 list_add(&c->head, &prefix->assignments);
934
935 // Excluded prefix
936 if (prefix->excl_length > 0) {
937 const char name[] = "!excluded";
938 c = malloc(sizeof(*c) + sizeof(name));
939 if (c) {
940 c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
941 ((1 << (64 - prefix->length)) - 1);
942 c->length = prefix->excl_length;
943 c->addr = in6addr_any;
944 memcpy(c->name, name, sizeof(name));
945 list_add(&c->head, &prefix->assignments);
946 }
947 }
948
949 bool assigned_any = false;
950 struct {
951 struct avl_node node;
952 } *entry, *n_entry;
953 struct avl_tree assign_later;
954
955 avl_init(&assign_later, prefix_assignment_cmp, false, NULL);
956
957 vlist_for_each_element(&interfaces, iface, node) {
958 if (iface->assignment_length < 48 ||
959 iface->assignment_length > 64)
960 continue;
961
962 // Test whether there is a matching class
963 if (!list_empty(&iface->assignment_classes)) {
964 bool found = false;
965
966 struct interface_assignment_class *c;
967 list_for_each_entry(c, &iface->assignment_classes, head) {
968 if (!strcmp(c->name, prefix->pclass)) {
969 found = true;
970 break;
971 }
972 }
973
974 if (!found)
975 continue;
976 }
977
978 size_t namelen = strlen(iface->name) + 1;
979 c = malloc(sizeof(*c) + namelen);
980 if (!c)
981 continue;
982
983 c->length = iface->assignment_length;
984 c->assigned = iface->assignment_hint;
985 c->weight = iface->assignment_weight;
986 c->addr = in6addr_any;
987 c->enabled = false;
988 memcpy(c->name, iface->name, namelen);
989
990 // First process all custom assignments, put all others in later-list
991 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
992 if (c->assigned != -1) {
993 c->assigned = -1;
994 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
995 "of size %hhu for %s, trying other\n", c->length, c->name);
996 }
997
998 entry = calloc(1, sizeof(*entry));
999 if (!entry) {
1000 free(c);
1001 continue;
1002 }
1003
1004 entry->node.key = c;
1005 avl_insert(&assign_later, &entry->node);
1006 }
1007
1008 if (c->assigned != -1)
1009 assigned_any = true;
1010 }
1011
1012 /* Then try to assign all other + failed custom assignments */
1013 avl_for_each_element_safe(&assign_later, entry, node, n_entry) {
1014 bool assigned = false;
1015
1016 c = (struct device_prefix_assignment *)entry->node.key;
1017 avl_delete(&assign_later, &entry->node);
1018
1019 do {
1020 assigned = interface_prefix_assign(&prefix->assignments, c);
1021 } while (!assigned && ++c->length <= 64);
1022
1023 if (!assigned) {
1024 netifd_log_message(L_WARNING, "Failed to assign subprefix "
1025 "of size %hhu for %s\n", c->length, c->name);
1026 free(c);
1027 } else
1028 assigned_any = true;
1029
1030 free(entry);
1031 }
1032
1033 list_for_each_entry(c, &prefix->assignments, head)
1034 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
1035 interface_set_prefix_address(c, prefix, iface, true);
1036
1037 if (!assigned_any)
1038 netifd_log_message(L_WARNING, "You have delegated IPv6-prefixes but haven't assigned them "
1039 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
1040 }
1041
1042
1043 void interface_refresh_assignments(bool hint)
1044 {
1045 static bool refresh = false;
1046 if (!hint && refresh) {
1047 struct device_prefix *p;
1048 list_for_each_entry(p, &prefixes, head)
1049 interface_update_prefix_assignments(p, true);
1050 }
1051 refresh = hint;
1052 }
1053
1054
1055 static void
1056 interface_update_prefix(struct vlist_tree *tree,
1057 struct vlist_node *node_new,
1058 struct vlist_node *node_old)
1059 {
1060 struct device_prefix *prefix_old, *prefix_new;
1061 prefix_old = container_of(node_old, struct device_prefix, node);
1062 prefix_new = container_of(node_new, struct device_prefix, node);
1063
1064 struct interface_ip_settings *ip = container_of(tree, struct interface_ip_settings, prefix);
1065 if (tree && (!node_new || !node_old))
1066 ip->iface->updated |= IUF_PREFIX;
1067
1068 struct device_route route;
1069 memset(&route, 0, sizeof(route));
1070 route.flags = DEVADDR_INET6;
1071 route.metric = INT32_MAX;
1072 route.mask = (node_new) ? prefix_new->length : prefix_old->length;
1073 route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
1074
1075
1076 struct device_prefix_assignment *c;
1077 struct interface *iface;
1078
1079 if (node_old && node_new) {
1080 // Move assignments and refresh addresses to update valid times
1081 list_splice(&prefix_old->assignments, &prefix_new->assignments);
1082
1083 list_for_each_entry(c, &prefix_new->assignments, head)
1084 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
1085 interface_set_prefix_address(c, prefix_new, iface, true);
1086
1087 if (prefix_new->preferred_until != prefix_old->preferred_until ||
1088 prefix_new->valid_until != prefix_old->valid_until)
1089 ip->iface->updated |= IUF_PREFIX;
1090 } else if (node_new) {
1091 // Set null-route to avoid routing loops
1092 system_add_route(NULL, &route);
1093
1094 if (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation)
1095 interface_update_prefix_assignments(prefix_new, true);
1096 } else if (node_old) {
1097 // Remove null-route
1098 interface_update_prefix_assignments(prefix_old, false);
1099 system_del_route(NULL, &route);
1100 }
1101
1102 if (node_old) {
1103 if (prefix_old->head.next)
1104 list_del(&prefix_old->head);
1105 free(prefix_old);
1106 }
1107
1108 if (node_new && (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation))
1109 list_add(&prefix_new->head, &prefixes);
1110
1111 }
1112
1113 struct device_prefix*
1114 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
1115 uint8_t length, time_t valid_until, time_t preferred_until,
1116 struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
1117 {
1118 if (!pclass)
1119 pclass = (iface) ? iface->name : "local";
1120
1121 struct device_prefix *prefix = calloc(1, sizeof(*prefix) + strlen(pclass) + 1);
1122 if (!prefix)
1123 return NULL;
1124
1125 prefix->length = length;
1126 prefix->addr = *addr;
1127 prefix->preferred_until = preferred_until;
1128 prefix->valid_until = valid_until;
1129 prefix->iface = iface;
1130 INIT_LIST_HEAD(&prefix->assignments);
1131
1132 if (excl_addr) {
1133 prefix->excl_addr = *excl_addr;
1134 prefix->excl_length = excl_length;
1135 }
1136
1137 strcpy(prefix->pclass, pclass);
1138
1139 if (iface)
1140 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
1141 else
1142 interface_update_prefix(NULL, &prefix->node, NULL);
1143
1144 return prefix;
1145 }
1146
1147 void
1148 interface_ip_set_ula_prefix(const char *prefix)
1149 {
1150 char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
1151 if (prefix)
1152 strncpy(buf, prefix, sizeof(buf) - 1);
1153 char *prefixaddr = strtok_r(buf, "/", &saveptr);
1154
1155 struct in6_addr addr;
1156 if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
1157 if (ula_prefix) {
1158 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1159 ula_prefix = NULL;
1160 }
1161 return;
1162 }
1163
1164 int length;
1165 char *prefixlen = strtok_r(NULL, ",", &saveptr);
1166 if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
1167 return;
1168
1169 if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
1170 ula_prefix->length != length) {
1171 if (ula_prefix)
1172 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1173
1174 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
1175 0, 0, NULL, 0, NULL);
1176 }
1177 }
1178
1179 static void
1180 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
1181 {
1182 struct dns_server *s;
1183
1184 s = calloc(1, sizeof(*s));
1185 if (!s)
1186 return;
1187
1188 s->af = AF_INET;
1189 if (inet_pton(s->af, str, &s->addr.in))
1190 goto add;
1191
1192 s->af = AF_INET6;
1193 if (inet_pton(s->af, str, &s->addr.in))
1194 goto add;
1195
1196 free(s);
1197 return;
1198
1199 add:
1200 D(INTERFACE, "Add IPv%c DNS server: %s\n",
1201 s->af == AF_INET6 ? '6' : '4', str);
1202 vlist_simple_add(&ip->dns_servers, &s->node);
1203 }
1204
1205 void
1206 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
1207 {
1208 struct blob_attr *cur;
1209 int rem;
1210
1211 blobmsg_for_each_attr(cur, list, rem) {
1212 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1213 continue;
1214
1215 if (!blobmsg_check_attr(cur, NULL))
1216 continue;
1217
1218 interface_add_dns_server(ip, blobmsg_data(cur));
1219 }
1220 }
1221
1222 static void
1223 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
1224 {
1225 struct dns_search_domain *s;
1226 int len = strlen(str);
1227
1228 s = calloc(1, sizeof(*s) + len + 1);
1229 if (!s)
1230 return;
1231
1232 D(INTERFACE, "Add DNS search domain: %s\n", str);
1233 memcpy(s->name, str, len);
1234 vlist_simple_add(&ip->dns_search, &s->node);
1235 }
1236
1237 void
1238 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
1239 {
1240 struct blob_attr *cur;
1241 int rem;
1242
1243 blobmsg_for_each_attr(cur, list, rem) {
1244 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1245 continue;
1246
1247 if (!blobmsg_check_attr(cur, NULL))
1248 continue;
1249
1250 interface_add_dns_search_domain(ip, blobmsg_data(cur));
1251 }
1252 }
1253
1254 static void
1255 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip, const char *dev)
1256 {
1257 struct dns_server *s;
1258 struct dns_search_domain *d;
1259 const char *str;
1260 char buf[INET6_ADDRSTRLEN];
1261
1262 vlist_simple_for_each_element(&ip->dns_servers, s, node) {
1263 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
1264 if (!str)
1265 continue;
1266
1267 if (s->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&s->addr.in6))
1268 fprintf(f, "nameserver %s%%%s\n", str, dev);
1269 else
1270 fprintf(f, "nameserver %s\n", str);
1271 }
1272
1273 vlist_simple_for_each_element(&ip->dns_search, d, node) {
1274 fprintf(f, "search %s\n", d->name);
1275 }
1276 }
1277
1278 /* Sorting of interface resolver entries : */
1279 /* Primary on interface dns_metric : lowest metric first */
1280 /* Secondary on interface metric : lowest metric first */
1281 /* Finally alphabetical order of interface names */
1282 static int resolv_conf_iface_cmp(const void *k1, const void *k2, void *ptr)
1283 {
1284 const struct interface *iface1 = k1, *iface2 = k2;
1285
1286 if (iface1->dns_metric != iface2->dns_metric)
1287 return iface1->dns_metric - iface2->dns_metric;
1288
1289 if (iface1->metric != iface2->metric)
1290 return iface1->metric - iface2->metric;
1291
1292 return strcmp(iface1->name, iface2->name);
1293 }
1294
1295 static void
1296 __interface_write_dns_entries(FILE *f)
1297 {
1298 struct interface *iface;
1299 struct {
1300 struct avl_node node;
1301 } *entry, *n_entry;
1302 struct avl_tree resolv_conf_iface_entries;
1303
1304 avl_init(&resolv_conf_iface_entries, resolv_conf_iface_cmp, false, NULL);
1305
1306 vlist_for_each_element(&interfaces, iface, node) {
1307 if (iface->state != IFS_UP)
1308 continue;
1309
1310 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
1311 vlist_simple_empty(&iface->proto_ip.dns_servers) &&
1312 vlist_simple_empty(&iface->config_ip.dns_search) &&
1313 vlist_simple_empty(&iface->config_ip.dns_servers))
1314 continue;
1315
1316 entry = calloc(1, sizeof(*entry));
1317 if (!entry)
1318 continue;
1319
1320 entry->node.key = iface;
1321 avl_insert(&resolv_conf_iface_entries, &entry->node);
1322 }
1323
1324 avl_for_each_element(&resolv_conf_iface_entries, entry, node) {
1325 iface = (struct interface *)entry->node.key;
1326 struct device *dev = iface->l3_dev.dev;
1327
1328 fprintf(f, "# Interface %s\n", iface->name);
1329
1330 write_resolv_conf_entries(f, &iface->config_ip, dev->ifname);
1331
1332 if (!iface->proto_ip.no_dns)
1333 write_resolv_conf_entries(f, &iface->proto_ip, dev->ifname);
1334 }
1335
1336 avl_remove_all_elements(&resolv_conf_iface_entries, entry, node, n_entry)
1337 free(entry);
1338 }
1339
1340 void
1341 interface_write_resolv_conf(void)
1342 {
1343 char *path = alloca(strlen(resolv_conf) + 5);
1344 FILE *f;
1345 uint32_t crcold, crcnew;
1346
1347 sprintf(path, "%s.tmp", resolv_conf);
1348 unlink(path);
1349 f = fopen(path, "w+");
1350 if (!f) {
1351 D(INTERFACE, "Failed to open %s for writing\n", path);
1352 return;
1353 }
1354
1355 __interface_write_dns_entries(f);
1356
1357 fflush(f);
1358 rewind(f);
1359 crcnew = crc32_file(f);
1360 fclose(f);
1361
1362 crcold = crcnew + 1;
1363 f = fopen(resolv_conf, "r");
1364 if (f) {
1365 crcold = crc32_file(f);
1366 fclose(f);
1367 }
1368
1369 if (crcold == crcnew) {
1370 unlink(path);
1371 } else if (rename(path, resolv_conf) < 0) {
1372 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
1373 unlink(path);
1374 }
1375 }
1376
1377 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
1378 {
1379 struct device_addr *addr;
1380 struct device_route *route;
1381 struct device *dev;
1382 struct interface *iface;
1383
1384 ip->enabled = enabled;
1385 iface = ip->iface;
1386 dev = iface->l3_dev.dev;
1387 if (!dev)
1388 return;
1389
1390 vlist_for_each_element(&ip->addr, addr, node) {
1391 bool v6 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6) ? true : false;
1392
1393 if (addr->flags & DEVADDR_EXTERNAL)
1394 continue;
1395
1396 if (addr->enabled == enabled)
1397 continue;
1398
1399 if (enabled) {
1400 system_add_address(dev, addr);
1401
1402 addr->policy_table = (v6) ? iface->ip6table : iface->ip4table;
1403 if (iface->metric || addr->policy_table)
1404 interface_handle_subnet_route(iface, addr, true);
1405
1406 if (addr->policy_table)
1407 interface_add_addr_rules(addr, true);
1408 } else {
1409 interface_handle_subnet_route(iface, addr, false);
1410 system_del_address(dev, addr);
1411
1412 if (addr->policy_table)
1413 interface_add_addr_rules(addr, false);
1414 }
1415 addr->enabled = enabled;
1416 }
1417
1418 vlist_for_each_element(&ip->route, route, node) {
1419 bool _enabled = enabled;
1420
1421 if (route->flags & DEVADDR_EXTERNAL)
1422 continue;
1423
1424 if (!enable_route(ip, route))
1425 _enabled = false;
1426
1427 if (route->enabled == _enabled)
1428 continue;
1429
1430 if (_enabled) {
1431 interface_set_route_info(ip->iface, route);
1432
1433 if (system_add_route(dev, route))
1434 route->failed = true;
1435 } else
1436 system_del_route(dev, route);
1437 route->enabled = _enabled;
1438 }
1439
1440 struct device_prefix *c;
1441 struct device_prefix_assignment *a;
1442 list_for_each_entry(c, &prefixes, head)
1443 list_for_each_entry(a, &c->assignments, head)
1444 if (!strcmp(a->name, ip->iface->name))
1445 interface_set_prefix_address(a, c, ip->iface, enabled);
1446
1447 if (ip->iface->policy_rules_set != enabled &&
1448 ip->iface->l3_dev.dev) {
1449 set_ip_lo_policy(enabled, true, ip->iface);
1450 set_ip_lo_policy(enabled, false, ip->iface);
1451
1452 set_ip_source_policy(enabled, true, IPRULE_PRIORITY_REJECT + ip->iface->l3_dev.dev->ifindex,
1453 NULL, 0, 0, ip->iface, "failed_policy", true);
1454 ip->iface->policy_rules_set = enabled;
1455 }
1456 }
1457
1458 void
1459 interface_ip_update_start(struct interface_ip_settings *ip)
1460 {
1461 if (ip != &ip->iface->config_ip) {
1462 vlist_simple_update(&ip->dns_servers);
1463 vlist_simple_update(&ip->dns_search);
1464 }
1465 vlist_update(&ip->route);
1466 vlist_update(&ip->addr);
1467 vlist_update(&ip->prefix);
1468 }
1469
1470 void
1471 interface_ip_update_complete(struct interface_ip_settings *ip)
1472 {
1473 vlist_simple_flush(&ip->dns_servers);
1474 vlist_simple_flush(&ip->dns_search);
1475 vlist_flush(&ip->route);
1476 vlist_flush(&ip->addr);
1477 vlist_flush(&ip->prefix);
1478 interface_write_resolv_conf();
1479 }
1480
1481 void
1482 interface_ip_flush(struct interface_ip_settings *ip)
1483 {
1484 if (ip == &ip->iface->proto_ip)
1485 vlist_flush_all(&ip->iface->host_routes);
1486 vlist_simple_flush_all(&ip->dns_servers);
1487 vlist_simple_flush_all(&ip->dns_search);
1488 vlist_flush_all(&ip->route);
1489 vlist_flush_all(&ip->addr);
1490 vlist_flush_all(&ip->prefix);
1491 }
1492
1493 static void
1494 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1495 {
1496 ip->iface = iface;
1497 ip->enabled = true;
1498 vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1499 vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1500 vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1501 vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1502 vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1503 }
1504
1505 void
1506 interface_ip_init(struct interface *iface)
1507 {
1508 __interface_ip_init(&iface->proto_ip, iface);
1509 __interface_ip_init(&iface->config_ip, iface);
1510 vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1511 }
1512
1513 static void
1514 interface_ip_valid_until_handler(struct uloop_timeout *t)
1515 {
1516 time_t now = system_get_rtime();
1517 struct interface *iface;
1518 vlist_for_each_element(&interfaces, iface, node) {
1519 if (iface->state != IFS_UP)
1520 continue;
1521
1522 struct device_addr *addr, *addrp;
1523 struct device_route *route, *routep;
1524 struct device_prefix *pref, *prefp;
1525
1526 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1527 if (addr->valid_until && addr->valid_until < now)
1528 vlist_delete(&iface->proto_ip.addr, &addr->node);
1529
1530 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1531 if (route->valid_until && route->valid_until < now)
1532 vlist_delete(&iface->proto_ip.route, &route->node);
1533
1534 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1535 if (pref->valid_until && pref->valid_until < now)
1536 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1537
1538 }
1539
1540 uloop_timeout_set(t, 1000);
1541 }
1542
1543 static void __init
1544 interface_ip_init_worker(void)
1545 {
1546 valid_until_timeout.cb = interface_ip_valid_until_handler;
1547 uloop_timeout_set(&valid_until_timeout, 1000);
1548 }
OpenWrt Network interface configuration daemon