netifd: Fix printf calls + function declarations.
[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 /*
854  * Sorting of assignment entries:
855  * Primary on assignment length: smallest assignment first
856  * Secondary on assignment weight: highest weight first
857  * Finally alphabetical order of interface names
858  */
859 static int prefix_assignment_cmp(const void *k1, const void *k2, void *ptr)
860 {
861         const struct device_prefix_assignment *a1 = k1, *a2 = k2;
862
863         if (a1->length != a2->length)
864                 return a1->length - a2->length;
865
866         if (a1->weight != a2->weight)
867                 return a2->weight - a1->weight;
868
869         return strcmp(a1->name, a2->name);
870 }
871
872 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
873 {
874         struct device_prefix_assignment *c;
875         struct interface *iface;
876
877         // Delete all assignments
878         while (!list_empty(&prefix->assignments)) {
879                 c = list_first_entry(&prefix->assignments,
880                                 struct device_prefix_assignment, head);
881                 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
882                         interface_set_prefix_address(c, prefix, iface, false);
883                 list_del(&c->head);
884                 free(c);
885         }
886
887         if (!setup)
888                 return;
889
890         // End-of-assignment sentinel
891         c = malloc(sizeof(*c) + 1);
892         if (!c)
893                 return;
894
895         c->assigned = 1 << (64 - prefix->length);
896         c->length = 64;
897         c->name[0] = 0;
898         c->addr = in6addr_any;
899         list_add(&c->head, &prefix->assignments);
900
901         // Excluded prefix
902         if (prefix->excl_length > 0) {
903                 const char name[] = "!excluded";
904                 c = malloc(sizeof(*c) + sizeof(name));
905                 if (c) {
906                         c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
907                                         ((1 << (64 - prefix->length)) - 1);
908                         c->length = prefix->excl_length;
909                         c->addr = in6addr_any;
910                         memcpy(c->name, name, sizeof(name));
911                         list_add(&c->head, &prefix->assignments);
912                 }
913         }
914
915         bool assigned_any = false;
916         struct {
917                 struct avl_node node;
918         } *entry, *n_entry;
919         struct avl_tree assign_later;
920
921         avl_init(&assign_later, prefix_assignment_cmp, false, NULL);
922
923         vlist_for_each_element(&interfaces, iface, node) {
924                 if (iface->assignment_length < 48 ||
925                                 iface->assignment_length > 64)
926                         continue;
927
928                 // Test whether there is a matching class
929                 if (!list_empty(&iface->assignment_classes)) {
930                         bool found = false;
931
932                         struct interface_assignment_class *c;
933                         list_for_each_entry(c, &iface->assignment_classes, head) {
934                                 if (!strcmp(c->name, prefix->pclass)) {
935                                         found = true;
936                                         break;
937                                 }
938                         }
939
940                         if (!found)
941                                 continue;
942                 }
943
944                 size_t namelen = strlen(iface->name) + 1;
945                 c = malloc(sizeof(*c) + namelen);
946                 if (!c)
947                         continue;
948
949                 c->length = iface->assignment_length;
950                 c->assigned = iface->assignment_hint;
951                 c->weight = iface->assignment_weight;
952                 c->addr = in6addr_any;
953                 c->enabled = false;
954                 memcpy(c->name, iface->name, namelen);
955
956                 // First process all custom assignments, put all others in later-list
957                 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
958                         if (c->assigned != -1) {
959                                 c->assigned = -1;
960                                 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
961                                                 "of size %hhu for %s, trying other\n", c->length, c->name);
962                         }
963
964                         entry = calloc(1, sizeof(*entry));
965                         if (!entry)
966                                 continue;
967
968                         entry->node.key = c;
969                         avl_insert(&assign_later, &entry->node);
970                 }
971
972                 if (c->assigned != -1)
973                         assigned_any = true;
974         }
975
976         /* Then try to assign all other + failed custom assignments */
977         avl_for_each_element_safe(&assign_later, entry, node, n_entry) {
978                 bool assigned = false;
979
980                 c = (struct device_prefix_assignment *)entry->node.key;
981                 avl_delete(&assign_later, &entry->node);
982
983                 do {
984                         assigned = interface_prefix_assign(&prefix->assignments, c);
985                 } while (!assigned && ++c->length <= 64);
986
987                 if (!assigned) {
988                         netifd_log_message(L_WARNING, "Failed to assign subprefix "
989                                         "of size %hhu for %s\n", c->length, c->name);
990                         free(c);
991                 } else
992                         assigned_any = true;
993
994                 free(entry);
995         }
996
997         list_for_each_entry(c, &prefix->assignments, head)
998                 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
999                         interface_set_prefix_address(c, prefix, iface, true);
1000
1001         if (!assigned_any)
1002                 netifd_log_message(L_WARNING, "You have delegated IPv6-prefixes but haven't assigned them "
1003                                 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
1004 }
1005
1006
1007 void interface_refresh_assignments(bool hint)
1008 {
1009         static bool refresh = false;
1010         if (!hint && refresh) {
1011                 struct device_prefix *p;
1012                 list_for_each_entry(p, &prefixes, head)
1013                         interface_update_prefix_assignments(p, true);
1014         }
1015         refresh = hint;
1016 }
1017
1018
1019 static void
1020 interface_update_prefix(struct vlist_tree *tree,
1021                              struct vlist_node *node_new,
1022                              struct vlist_node *node_old)
1023 {
1024         struct device_prefix *prefix_old, *prefix_new;
1025         prefix_old = container_of(node_old, struct device_prefix, node);
1026         prefix_new = container_of(node_new, struct device_prefix, node);
1027
1028         struct interface_ip_settings *ip = container_of(tree, struct interface_ip_settings, prefix);
1029         if (tree && (!node_new || !node_old))
1030                 ip->iface->updated |= IUF_PREFIX;
1031
1032         struct device_route route;
1033         memset(&route, 0, sizeof(route));
1034         route.flags = DEVADDR_INET6;
1035         route.metric = INT32_MAX;
1036         route.mask = (node_new) ? prefix_new->length : prefix_old->length;
1037         route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
1038
1039
1040         struct device_prefix_assignment *c;
1041         struct interface *iface;
1042
1043         if (node_old && node_new) {
1044                 // Move assignments and refresh addresses to update valid times
1045                 list_splice(&prefix_old->assignments, &prefix_new->assignments);
1046
1047                 list_for_each_entry(c, &prefix_new->assignments, head)
1048                         if ((iface = vlist_find(&interfaces, c->name, iface, node)))
1049                                 interface_set_prefix_address(c, prefix_new, iface, true);
1050
1051                 if (prefix_new->preferred_until != prefix_old->preferred_until ||
1052                                 prefix_new->valid_until != prefix_old->valid_until)
1053                         ip->iface->updated |= IUF_PREFIX;
1054         } else if (node_new) {
1055                 // Set null-route to avoid routing loops
1056                 system_add_route(NULL, &route);
1057
1058                 if (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation)
1059                         interface_update_prefix_assignments(prefix_new, true);
1060         } else if (node_old) {
1061                 // Remove null-route
1062                 interface_update_prefix_assignments(prefix_old, false);
1063                 system_del_route(NULL, &route);
1064         }
1065
1066         if (node_old) {
1067                 if (prefix_old->head.next)
1068                         list_del(&prefix_old->head);
1069                 free(prefix_old);
1070         }
1071
1072         if (node_new && (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation))
1073                 list_add(&prefix_new->head, &prefixes);
1074
1075 }
1076
1077 struct device_prefix*
1078 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
1079                 uint8_t length, time_t valid_until, time_t preferred_until,
1080                 struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
1081 {
1082         if (!pclass)
1083                 pclass = (iface) ? iface->name : "local";
1084
1085         struct device_prefix *prefix = calloc(1, sizeof(*prefix) + strlen(pclass) + 1);
1086         if (!prefix)
1087                 return NULL;
1088
1089         prefix->length = length;
1090         prefix->addr = *addr;
1091         prefix->preferred_until = preferred_until;
1092         prefix->valid_until = valid_until;
1093         prefix->iface = iface;
1094         INIT_LIST_HEAD(&prefix->assignments);
1095
1096         if (excl_addr) {
1097                 prefix->excl_addr = *excl_addr;
1098                 prefix->excl_length = excl_length;
1099         }
1100
1101         strcpy(prefix->pclass, pclass);
1102
1103         if (iface)
1104                 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
1105         else
1106                 interface_update_prefix(NULL, &prefix->node, NULL);
1107
1108         return prefix;
1109 }
1110
1111 void
1112 interface_ip_set_ula_prefix(const char *prefix)
1113 {
1114         char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
1115         if (prefix)
1116                 strncpy(buf, prefix, sizeof(buf) - 1);
1117         char *prefixaddr = strtok_r(buf, "/", &saveptr);
1118
1119         struct in6_addr addr;
1120         if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
1121                 if (ula_prefix) {
1122                         interface_update_prefix(NULL, NULL, &ula_prefix->node);
1123                         ula_prefix = NULL;
1124                 }
1125                 return;
1126         }
1127
1128         int length;
1129         char *prefixlen = strtok_r(NULL, ",", &saveptr);
1130         if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
1131                 return;
1132
1133         if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
1134                         ula_prefix->length != length) {
1135                 if (ula_prefix)
1136                         interface_update_prefix(NULL, NULL, &ula_prefix->node);
1137
1138                 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
1139                                 0, 0, NULL, 0, NULL);
1140         }
1141 }
1142
1143 void
1144 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
1145 {
1146         struct dns_server *s;
1147
1148         s = calloc(1, sizeof(*s));
1149         if (!s)
1150                 return;
1151
1152         s->af = AF_INET;
1153         if (inet_pton(s->af, str, &s->addr.in))
1154                 goto add;
1155
1156         s->af = AF_INET6;
1157         if (inet_pton(s->af, str, &s->addr.in))
1158                 goto add;
1159
1160         free(s);
1161         return;
1162
1163 add:
1164         D(INTERFACE, "Add IPv%c DNS server: %s\n",
1165           s->af == AF_INET6 ? '6' : '4', str);
1166         vlist_simple_add(&ip->dns_servers, &s->node);
1167 }
1168
1169 void
1170 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
1171 {
1172         struct blob_attr *cur;
1173         int rem;
1174
1175         blobmsg_for_each_attr(cur, list, rem) {
1176                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1177                         continue;
1178
1179                 if (!blobmsg_check_attr(cur, NULL))
1180                         continue;
1181
1182                 interface_add_dns_server(ip, blobmsg_data(cur));
1183         }
1184 }
1185
1186 static void
1187 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
1188 {
1189         struct dns_search_domain *s;
1190         int len = strlen(str);
1191
1192         s = calloc(1, sizeof(*s) + len + 1);
1193         if (!s)
1194                 return;
1195
1196         D(INTERFACE, "Add DNS search domain: %s\n", str);
1197         memcpy(s->name, str, len);
1198         vlist_simple_add(&ip->dns_search, &s->node);
1199 }
1200
1201 void
1202 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
1203 {
1204         struct blob_attr *cur;
1205         int rem;
1206
1207         blobmsg_for_each_attr(cur, list, rem) {
1208                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1209                         continue;
1210
1211                 if (!blobmsg_check_attr(cur, NULL))
1212                         continue;
1213
1214                 interface_add_dns_search_domain(ip, blobmsg_data(cur));
1215         }
1216 }
1217
1218 static void
1219 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip, const char *dev)
1220 {
1221         struct dns_server *s;
1222         struct dns_search_domain *d;
1223         const char *str;
1224         char buf[INET6_ADDRSTRLEN];
1225
1226         vlist_simple_for_each_element(&ip->dns_servers, s, node) {
1227                 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
1228                 if (!str)
1229                         continue;
1230
1231                 if (s->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&s->addr.in6))
1232                         fprintf(f, "nameserver %s%%%s\n", str, dev);
1233                 else
1234                         fprintf(f, "nameserver %s\n", str);
1235         }
1236
1237         vlist_simple_for_each_element(&ip->dns_search, d, node) {
1238                 fprintf(f, "search %s\n", d->name);
1239         }
1240 }
1241
1242 /* Sorting of interface resolver entries :               */
1243 /* Primary on interface dns_metric : lowest metric first */
1244 /* Secondary on interface metric : lowest metric first   */
1245 /* Finally alphabetical order of interface names         */
1246 static int resolv_conf_iface_cmp(const void *k1, const void *k2, void *ptr)
1247 {
1248         const struct interface *iface1 = k1, *iface2 = k2;
1249
1250         if (iface1->dns_metric != iface2->dns_metric)
1251                 return iface1->dns_metric - iface2->dns_metric;
1252
1253         if (iface1->metric != iface2->metric)
1254                 return iface1->metric - iface2->metric;
1255
1256         return strcmp(iface1->name, iface2->name);
1257 }
1258
1259 static void
1260 __interface_write_dns_entries(FILE *f)
1261 {
1262         struct interface *iface;
1263         struct {
1264                 struct avl_node node;
1265         } *entry, *n_entry;
1266         struct avl_tree resolv_conf_iface_entries;
1267
1268         avl_init(&resolv_conf_iface_entries, resolv_conf_iface_cmp, false, NULL);
1269
1270         vlist_for_each_element(&interfaces, iface, node) {
1271                 if (iface->state != IFS_UP)
1272                         continue;
1273
1274                 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
1275                     vlist_simple_empty(&iface->proto_ip.dns_servers) &&
1276                     vlist_simple_empty(&iface->config_ip.dns_search) &&
1277                     vlist_simple_empty(&iface->config_ip.dns_servers))
1278                         continue;
1279
1280                 entry = calloc(1, sizeof(*entry));
1281                 if (!entry)
1282                         continue;
1283
1284                 entry->node.key = iface;
1285                 avl_insert(&resolv_conf_iface_entries, &entry->node);
1286         }
1287
1288         avl_for_each_element(&resolv_conf_iface_entries, entry, node) {
1289                 iface = (struct interface *)entry->node.key;
1290                 struct device *dev = iface->l3_dev.dev;
1291
1292                 fprintf(f, "# Interface %s\n", iface->name);
1293
1294                 write_resolv_conf_entries(f, &iface->config_ip, dev->ifname);
1295
1296                 if (!iface->proto_ip.no_dns)
1297                         write_resolv_conf_entries(f, &iface->proto_ip, dev->ifname);
1298         }
1299
1300         avl_remove_all_elements(&resolv_conf_iface_entries, entry, node, n_entry)
1301                 free(entry);
1302 }
1303
1304 void
1305 interface_write_resolv_conf(void)
1306 {
1307         char *path = alloca(strlen(resolv_conf) + 5);
1308         FILE *f;
1309         uint32_t crcold, crcnew;
1310
1311         sprintf(path, "%s.tmp", resolv_conf);
1312         unlink(path);
1313         f = fopen(path, "w+");
1314         if (!f) {
1315                 D(INTERFACE, "Failed to open %s for writing\n", path);
1316                 return;
1317         }
1318
1319         __interface_write_dns_entries(f);
1320
1321         fflush(f);
1322         rewind(f);
1323         crcnew = crc32_file(f);
1324         fclose(f);
1325
1326         crcold = crcnew + 1;
1327         f = fopen(resolv_conf, "r");
1328         if (f) {
1329                 crcold = crc32_file(f);
1330                 fclose(f);
1331         }
1332
1333         if (crcold == crcnew) {
1334                 unlink(path);
1335         } else if (rename(path, resolv_conf) < 0) {
1336                 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
1337                 unlink(path);
1338         }
1339 }
1340
1341 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
1342 {
1343         struct device_addr *addr;
1344         struct device_route *route;
1345         struct device *dev;
1346         struct interface *iface;
1347
1348         ip->enabled = enabled;
1349         iface = ip->iface;
1350         dev = iface->l3_dev.dev;
1351         if (!dev)
1352                 return;
1353
1354         vlist_for_each_element(&ip->addr, addr, node) {
1355                 bool v6 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6) ? true : false;
1356
1357                 if (addr->flags & DEVADDR_EXTERNAL)
1358                         continue;
1359
1360                 if (addr->enabled == enabled)
1361                         continue;
1362
1363                 if (enabled) {
1364                         system_add_address(dev, addr);
1365
1366                         addr->policy_table = (v6) ? iface->ip6table : iface->ip4table;
1367                         if (iface->metric || addr->policy_table)
1368                                 interface_handle_subnet_route(iface, addr, true);
1369
1370                         if (addr->policy_table)
1371                                 interface_add_addr_rules(addr, true);
1372                 } else {
1373                         interface_handle_subnet_route(iface, addr, false);
1374                         system_del_address(dev, addr);
1375
1376                         if (addr->policy_table)
1377                                 interface_add_addr_rules(addr, false);
1378                 }
1379                 addr->enabled = enabled;
1380         }
1381
1382         vlist_for_each_element(&ip->route, route, node) {
1383                 bool _enabled = enabled;
1384
1385                 if (route->flags & DEVADDR_EXTERNAL)
1386                         continue;
1387
1388                 if (!enable_route(ip, route))
1389                         _enabled = false;
1390
1391                 if (route->enabled == _enabled)
1392                         continue;
1393
1394                 if (_enabled) {
1395                         interface_set_route_info(ip->iface, route);
1396
1397                         if (system_add_route(dev, route))
1398                                 route->failed = true;
1399                 } else
1400                         system_del_route(dev, route);
1401                 route->enabled = _enabled;
1402         }
1403
1404         struct device_prefix *c;
1405         struct device_prefix_assignment *a;
1406         list_for_each_entry(c, &prefixes, head)
1407                 list_for_each_entry(a, &c->assignments, head)
1408                         if (!strcmp(a->name, ip->iface->name))
1409                                 interface_set_prefix_address(a, c, ip->iface, enabled);
1410
1411         if (ip->iface && ip->iface->policy_rules_set != enabled &&
1412             ip->iface->l3_dev.dev) {
1413                 set_ip_lo_policy(enabled, true, ip->iface);
1414                 set_ip_lo_policy(enabled, false, ip->iface);
1415
1416                 set_ip_source_policy(enabled, true, IPRULE_PRIORITY_REJECT + ip->iface->l3_dev.dev->ifindex,
1417                         NULL, 0, 0, ip->iface, "failed_policy", true);
1418                 ip->iface->policy_rules_set = enabled;
1419         }
1420 }
1421
1422 void
1423 interface_ip_update_start(struct interface_ip_settings *ip)
1424 {
1425         if (ip != &ip->iface->config_ip) {
1426                 vlist_simple_update(&ip->dns_servers);
1427                 vlist_simple_update(&ip->dns_search);
1428         }
1429         vlist_update(&ip->route);
1430         vlist_update(&ip->addr);
1431         vlist_update(&ip->prefix);
1432 }
1433
1434 void
1435 interface_ip_update_complete(struct interface_ip_settings *ip)
1436 {
1437         vlist_simple_flush(&ip->dns_servers);
1438         vlist_simple_flush(&ip->dns_search);
1439         vlist_flush(&ip->route);
1440         vlist_flush(&ip->addr);
1441         vlist_flush(&ip->prefix);
1442         interface_write_resolv_conf();
1443 }
1444
1445 void
1446 interface_ip_flush(struct interface_ip_settings *ip)
1447 {
1448         if (ip == &ip->iface->proto_ip)
1449                 vlist_flush_all(&ip->iface->host_routes);
1450         vlist_simple_flush_all(&ip->dns_servers);
1451         vlist_simple_flush_all(&ip->dns_search);
1452         vlist_flush_all(&ip->route);
1453         vlist_flush_all(&ip->addr);
1454         vlist_flush_all(&ip->prefix);
1455 }
1456
1457 static void
1458 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1459 {
1460         ip->iface = iface;
1461         ip->enabled = true;
1462         vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1463         vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1464         vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1465         vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1466         vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1467 }
1468
1469 void
1470 interface_ip_init(struct interface *iface)
1471 {
1472         __interface_ip_init(&iface->proto_ip, iface);
1473         __interface_ip_init(&iface->config_ip, iface);
1474         vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1475 }
1476
1477 static void
1478 interface_ip_valid_until_handler(struct uloop_timeout *t)
1479 {
1480         time_t now = system_get_rtime();
1481         struct interface *iface;
1482         vlist_for_each_element(&interfaces, iface, node) {
1483                 if (iface->state != IFS_UP)
1484                         continue;
1485
1486                 struct device_addr *addr, *addrp;
1487                 struct device_route *route, *routep;
1488                 struct device_prefix *pref, *prefp;
1489
1490                 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1491                         if (addr->valid_until && addr->valid_until < now)
1492                                 vlist_delete(&iface->proto_ip.addr, &addr->node);
1493
1494                 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1495                         if (route->valid_until && route->valid_until < now)
1496                                 vlist_delete(&iface->proto_ip.route, &route->node);
1497
1498                 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1499                         if (pref->valid_until && pref->valid_until < now)
1500                                 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1501
1502         }
1503
1504         uloop_timeout_set(t, 1000);
1505 }
1506
1507 static void __init
1508 interface_ip_init_worker(void)
1509 {
1510         valid_until_timeout.cb = interface_ip_valid_until_handler;
1511         uloop_timeout_set(&valid_until_timeout, 1000);
1512 }