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