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                         unsigned int table = (v6) ? iface->ip6table : iface->ip4table;
 514
 515                         //This is needed for source routing to work correctly. If a device
 516                         //has two connections to a network using the same subnet, adding
 517                         //only the network-rule will cause packets to be routed through the
 518                         //first matching network (source IP matches both masks).
 519                         if (table) {
 520                                 set_ip_source_policy(false, v6, IPRULE_PRIORITY_ADDR, &a_old->addr,
 521                                                 (v6) ? 128 : 32, table, NULL, NULL);
 522
 523                                 if (a_old->mask != ((v6) ? 128 : 32))
 524                                         set_ip_source_policy(false, v6, IPRULE_PRIORITY_NW, &a_old->addr,
 525                                                         a_old->mask, table, NULL, NULL);
 526                         }
 527
 528                         if (!(a_old->flags & DEVADDR_EXTERNAL)) {
 529                                 interface_handle_subnet_route(iface, a_old, false);
 530                                 system_del_address(dev, a_old);
 531                         }
 532                 }
 533                 free(a_old->pclass);
 534                 free(a_old);
 535         }
 536
 537         if (node_new) {
 538                 a_new->enabled = true;
 539                 if (!keep || replace) {
 540                         if (!(a_new->flags & DEVADDR_EXTERNAL)) {
 541                                 if (system_add_address(dev, a_new))
 542                                         a_new->failed = true;
 543
 544                                 if (iface->metric)
 545                                         interface_handle_subnet_route(iface, a_new, true);
 546                         }
 547
 548                         if (!keep) {
 549                                 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
 550                                         v6 = true;
 551
 552                                 unsigned int table = (v6) ? iface->ip6table : iface->ip4table;
 553
 554                                 if (table) {
 555                                         set_ip_source_policy(true, v6, IPRULE_PRIORITY_ADDR, &a_new->addr,
 556                                                         (v6) ? 128 : 32, table, NULL, NULL);
 557
 558                                         if (a_new->mask != ((v6) ? 128 : 32))
 559                                                 set_ip_source_policy(true, v6, IPRULE_PRIORITY_NW, &a_new->addr,
 560                                                                 a_new->mask, table, NULL, NULL);
 561                                 }
 562                         }
 563                 }
 564         }
 565 }
 566
 567 static bool
 568 enable_route(struct interface_ip_settings *ip, struct device_route *route)
 569 {
 570         if (ip->no_defaultroute && !route->mask)
 571                 return false;
 572
 573         return ip->enabled;
 574 }
 575
 576 static void
 577 interface_update_proto_route(struct vlist_tree *tree,
 578                              struct vlist_node *node_new,
 579                              struct vlist_node *node_old)
 580 {
 581         struct interface_ip_settings *ip;
 582         struct interface *iface;
 583         struct device *dev;
 584         struct device_route *route_old, *route_new;
 585         bool keep = false;
 586
 587         ip = container_of(tree, struct interface_ip_settings, route);
 588         iface = ip->iface;
 589         dev = iface->l3_dev.dev;
 590
 591         if (!node_new || !node_old)
 592                 iface->updated |= IUF_ROUTE;
 593
 594         route_old = container_of(node_old, struct device_route, node);
 595         route_new = container_of(node_new, struct device_route, node);
 596
 597         if (node_old && node_new)
 598                 keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop)) &&
 599                         (route_old->mtu == route_new->mtu) && (route_old->type == route_new->type) &&
 600                         !route_old->failed;
 601
 602         if (node_old) {
 603                 if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
 604                         system_del_route(dev, route_old);
 605
 606                 free(route_old);
 607         }
 608
 609         if (node_new) {
 610                 bool _enabled = enable_route(ip, route_new);
 611
 612                 if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
 613                         if (system_add_route(dev, route_new))
 614                                 route_new->failed = true;
 615
 616                 route_new->iface = iface;
 617                 route_new->enabled = _enabled;
 618         }
 619 }
 620
 621 static void
 622 interface_update_host_route(struct vlist_tree *tree,
 623                              struct vlist_node *node_new,
 624                              struct vlist_node *node_old)
 625 {
 626         struct interface *iface;
 627         struct device *dev;
 628         struct device_route *route_old, *route_new;
 629
 630         iface = container_of(tree, struct interface, host_routes);
 631         dev = iface->l3_dev.dev;
 632
 633         route_old = container_of(node_old, struct device_route, node);
 634         route_new = container_of(node_new, struct device_route, node);
 635
 636         if (node_old) {
 637                 system_del_route(dev, route_old);
 638                 free(route_old);
 639         }
 640
 641         if (node_new) {
 642                 if (system_add_route(dev, route_new))
 643                         route_new->failed = true;
 644         }
 645 }
 646
 647 static void
 648 random_ifaceid(struct in6_addr *addr)
 649 {
 650         static bool initialized = false;
 651         struct timeval t;
 652
 653         if (!initialized) {
 654                 long int seed = 0;
 655                 gettimeofday(&t, NULL);
 656                 seed = t.tv_sec ^ t.tv_usec ^ getpid();
 657                 srand48(seed);
 658                 initialized = true;
 659         }
 660         addr->s6_addr32[2] = (uint32_t)mrand48();
 661         addr->s6_addr32[3] = (uint32_t)mrand48();
 662 }
 663
 664 static void
 665 eui64_ifaceid(struct interface *iface, struct in6_addr *addr)
 666 {
 667         /* get mac address */
 668         uint8_t *macaddr = iface->l3_dev.dev->settings.macaddr;
 669         uint8_t *ifaceid = addr->s6_addr + 8;
 670         memcpy(ifaceid,macaddr,3);
 671         memcpy(ifaceid + 5,macaddr + 3, 3);
 672         ifaceid[3] = 0xff;
 673         ifaceid[4] = 0xfe;
 674         ifaceid[0] ^= 0x02;
 675 }
 676
 677 static void
 678 generate_ifaceid(struct interface *iface, struct in6_addr *addr)
 679 {
 680         /* generate new iface id */
 681         switch (iface->assignment_iface_id_selection) {
 682         case IFID_FIXED:
 683                 /* fixed */
 684                 /* copy host part from assignment_fixed_iface_id */
 685                 memcpy(addr->s6_addr + 8, iface->assignment_fixed_iface_id.s6_addr + 8, 8);
 686                 break;
 687         case IFID_RANDOM:
 688                 /* randomize last 64 bits */
 689                 random_ifaceid(addr);
 690                 break;
 691         case IFID_EUI64:
 692                 /* eui64 */
 693                 eui64_ifaceid(iface, addr);
 694                 break;
 695         }
 696 }
 697
 698 static void
 699 interface_set_prefix_address(struct device_prefix_assignment *assignment,
 700                 const struct device_prefix *prefix, struct interface *iface, bool add)
 701 {
 702         const struct interface *uplink = prefix->iface;
 703         if (!iface->l3_dev.dev)
 704                 return;
 705
 706         struct device *l3_downlink = iface->l3_dev.dev;
 707
 708         struct device_addr addr;
 709         struct device_route route;
 710         memset(&addr, 0, sizeof(addr));
 711         memset(&route, 0, sizeof(route));
 712
 713         if (IN6_IS_ADDR_UNSPECIFIED(&assignment->addr)) {
 714                 addr.addr.in6 = prefix->addr;
 715                 addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
 716                 generate_ifaceid(iface, &addr.addr.in6);
 717                 assignment->addr = addr.addr.in6;
 718         }
 719         else
 720                 addr.addr.in6 = assignment->addr;
 721
 722         addr.mask = assignment->length;
 723         addr.flags = DEVADDR_INET6 | DEVADDR_OFFLINK;
 724         addr.preferred_until = prefix->preferred_until;
 725         addr.valid_until = prefix->valid_until;
 726
 727         route.flags = DEVADDR_INET6;
 728         route.mask = addr.mask < 64 ? 64 : addr.mask;
 729         route.addr = addr.addr;
 730         clear_if_addr(&route.addr, route.mask);
 731
 732         if (!add && assignment->enabled) {
 733                 time_t now = system_get_rtime();
 734                 addr.preferred_until = now;
 735                 if (!addr.valid_until || addr.valid_until - now > 7200)
 736                         addr.valid_until = now + 7200;
 737
 738                 if (prefix->iface) {
 739                         if (prefix->iface->ip6table)
 740                                 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW, &addr.addr,
 741                                                 addr.mask, prefix->iface->ip6table, iface, NULL);
 742
 743                         set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT, &addr.addr,
 744                                                         addr.mask, 0, iface, "unreachable");
 745                 }
 746
 747                 system_del_route(l3_downlink, &route);
 748                 system_add_address(l3_downlink, &addr);
 749
 750                 assignment->enabled = false;
 751         } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP) &&
 752                         !system_add_address(l3_downlink, &addr)) {
 753
 754                 if (prefix->iface && !assignment->enabled) {
 755                         set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT, &addr.addr,
 756                                         addr.mask, 0, iface, "unreachable");
 757
 758                         if (prefix->iface->ip6table)
 759                                 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW, &addr.addr,
 760                                                 addr.mask, prefix->iface->ip6table, iface, NULL);
 761                 }
 762
 763                 route.metric = iface->metric;
 764                 system_add_route(l3_downlink, &route);
 765
 766                 if (uplink && uplink->l3_dev.dev && !(l3_downlink->settings.flags & DEV_OPT_MTU6)) {
 767                         int mtu = system_update_ipv6_mtu(uplink->l3_dev.dev, 0);
 768                         int mtu_old = system_update_ipv6_mtu(l3_downlink, 0);
 769
 770                         if (mtu > 0 && mtu_old > mtu)
 771                                 system_update_ipv6_mtu(l3_downlink, mtu);
 772                 }
 773
 774                 assignment->enabled = true;
 775         }
 776 }
 777
 778 static bool interface_prefix_assign(struct list_head *list,
 779                 struct device_prefix_assignment *assign)
 780 {
 781         int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
 782         struct device_prefix_assignment *c;
 783         list_for_each_entry(c, list, head) {
 784                 if (assign->assigned != -1) {
 785                         if (assign->assigned >= current && assign->assigned + asize < c->assigned) {
 786                                 list_add_tail(&assign->head, &c->head);
 787                                 return true;
 788                         }
 789                 } else if (assign->assigned == -1) {
 790                         current = (current + asize) & (~asize);
 791                         if (current + asize < c->assigned) {
 792                                 assign->assigned = current;
 793                                 list_add_tail(&assign->head, &c->head);
 794                                 return true;
 795                         }
 796                 }
 797                 current = (c->assigned + (1 << (64 - c->length)));
 798         }
 799         return false;
 800 }
 801
 802 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
 803 {
 804         struct device_prefix_assignment *c;
 805         struct interface *iface;
 806
 807         // Delete all assignments
 808         while (!list_empty(&prefix->assignments)) {
 809                 c = list_first_entry(&prefix->assignments,
 810                                 struct device_prefix_assignment, head);
 811                 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
 812                         interface_set_prefix_address(c, prefix, iface, false);
 813                 list_del(&c->head);
 814                 free(c);
 815         }
 816
 817         if (!setup)
 818                 return;
 819
 820         // End-of-assignment sentinel
 821         c = malloc(sizeof(*c) + 1);
 822         c->assigned = 1 << (64 - prefix->length);
 823         c->length = 64;
 824         c->name[0] = 0;
 825         c->addr = in6addr_any;
 826         list_add(&c->head, &prefix->assignments);
 827
 828         // Excluded prefix
 829         if (prefix->excl_length > 0) {
 830                 const char name[] = "!excluded";
 831                 c = malloc(sizeof(*c) + sizeof(name));
 832                 c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
 833                                 ((1 << (64 - prefix->length)) - 1);
 834                 c->length = prefix->excl_length;
 835                 c->addr = in6addr_any;
 836                 memcpy(c->name, name, sizeof(name));
 837                 list_add(&c->head, &prefix->assignments);
 838         }
 839
 840         bool assigned_any = false;
 841         struct list_head assign_later = LIST_HEAD_INIT(assign_later);
 842         vlist_for_each_element(&interfaces, iface, node) {
 843                 if (iface->assignment_length < 48 ||
 844                                 iface->assignment_length > 64)
 845                         continue;
 846
 847                 // Test whether there is a matching class
 848                 if (!list_empty(&iface->assignment_classes)) {
 849                         bool found = false;
 850
 851                         struct interface_assignment_class *c;
 852                         list_for_each_entry(c, &iface->assignment_classes, head) {
 853                                 if (!strcmp(c->name, prefix->pclass)) {
 854                                         found = true;
 855                                         break;
 856                                 }
 857                         }
 858
 859                         if (!found)
 860                                 continue;
 861                 }
 862
 863                 size_t namelen = strlen(iface->name) + 1;
 864                 c = malloc(sizeof(*c) + namelen);
 865                 c->length = iface->assignment_length;
 866                 c->assigned = iface->assignment_hint;
 867                 c->addr = in6addr_any;
 868                 c->enabled = false;
 869                 memcpy(c->name, iface->name, namelen);
 870
 871                 // First process all custom assignments, put all others in later-list
 872                 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
 873                         if (c->assigned != -1) {
 874                                 c->assigned = -1;
 875                                 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
 876                                                 "of size %hhu for %s, trying other\n", c->length, c->name);
 877                         }
 878
 879                         struct list_head *next = &assign_later;
 880                         struct device_prefix_assignment *n;
 881                         list_for_each_entry(n, &assign_later, head) {
 882                                 if (n->length < c->length) {
 883                                         next = &n->head;
 884                                         break;
 885                                 }
 886                         }
 887                         list_add_tail(&c->head, next);
 888                 }
 889
 890                 if (c->assigned != -1)
 891                         assigned_any = true;
 892         }
 893
 894         // Then try to assign all other + failed custom assignments
 895         while (!list_empty(&assign_later)) {
 896                 c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
 897                 list_del(&c->head);
 898
 899                 bool assigned = false;
 900                 do {
 901                         assigned = interface_prefix_assign(&prefix->assignments, c);
 902                 } while (!assigned && ++c->length <= 64);
 903
 904                 if (!assigned) {
 905                         netifd_log_message(L_WARNING, "Failed to assign subprefix "
 906                                         "of size %hhu for %s\n", c->length, c->name);
 907                         free(c);
 908                 } else {
 909                         assigned_any = true;
 910                 }
 911         }
 912
 913         list_for_each_entry(c, &prefix->assignments, head)
 914                 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
 915                         interface_set_prefix_address(c, prefix, iface, true);
 916
 917         if (!assigned_any)
 918                 netifd_log_message(L_WARNING, "You have delegated IPv6-prefixes but haven't assigned them "
 919                                 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
 920 }
 921
 922
 923 void interface_refresh_assignments(bool hint)
 924 {
 925         static bool refresh = false;
 926         if (!hint && refresh) {
 927                 struct device_prefix *p;
 928                 list_for_each_entry(p, &prefixes, head)
 929                         interface_update_prefix_assignments(p, true);
 930         }
 931         refresh = hint;
 932 }
 933
 934
 935 static void
 936 interface_update_prefix(struct vlist_tree *tree,
 937                              struct vlist_node *node_new,
 938                              struct vlist_node *node_old)
 939 {
 940         struct device_prefix *prefix_old, *prefix_new;
 941         prefix_old = container_of(node_old, struct device_prefix, node);
 942         prefix_new = container_of(node_new, struct device_prefix, node);
 943
 944         struct interface_ip_settings *ip = container_of(tree, struct interface_ip_settings, prefix);
 945         if (tree && (!node_new || !node_old))
 946                 ip->iface->updated |= IUF_PREFIX;
 947
 948         struct device_route route;
 949         memset(&route, 0, sizeof(route));
 950         route.flags = DEVADDR_INET6;
 951         route.metric = INT32_MAX;
 952         route.mask = (node_new) ? prefix_new->length : prefix_old->length;
 953         route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
 954
 955
 956         struct device_prefix_assignment *c;
 957         struct interface *iface;
 958
 959         if (node_old && node_new) {
 960                 // Move assignments and refresh addresses to update valid times
 961                 list_splice(&prefix_old->assignments, &prefix_new->assignments);
 962
 963                 list_for_each_entry(c, &prefix_new->assignments, head)
 964                         if ((iface = vlist_find(&interfaces, c->name, iface, node)))
 965                                 interface_set_prefix_address(c, prefix_new, iface, true);
 966         } else if (node_new) {
 967                 // Set null-route to avoid routing loops
 968                 system_add_route(NULL, &route);
 969
 970                 if (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation)
 971                         interface_update_prefix_assignments(prefix_new, true);
 972         } else if (node_old) {
 973                 // Remove null-route
 974                 interface_update_prefix_assignments(prefix_old, false);
 975                 system_del_route(NULL, &route);
 976         }
 977
 978         if (node_old) {
 979                 if (prefix_old->head.next)
 980                         list_del(&prefix_old->head);
 981                 free(prefix_old);
 982         }
 983
 984         if (node_new && (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation))
 985                 list_add(&prefix_new->head, &prefixes);
 986
 987 }
 988
 989 struct device_prefix*
 990 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
 991                 uint8_t length, time_t valid_until, time_t preferred_until,
 992                 struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
 993 {
 994         if (!pclass)
 995                 pclass = (iface) ? iface->name : "local";
 996
 997         struct device_prefix *prefix = calloc(1, sizeof(*prefix) + strlen(pclass) + 1);
 998         prefix->length = length;
 999         prefix->addr = *addr;
1000         prefix->preferred_until = preferred_until;
1001         prefix->valid_until = valid_until;
1002         prefix->iface = iface;
1003         INIT_LIST_HEAD(&prefix->assignments);
1004
1005         if (excl_addr) {
1006                 prefix->excl_addr = *excl_addr;
1007                 prefix->excl_length = excl_length;
1008         }
1009
1010         strcpy(prefix->pclass, pclass);
1011
1012         if (iface)
1013                 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
1014         else
1015                 interface_update_prefix(NULL, &prefix->node, NULL);
1016
1017         return prefix;
1018 }
1019
1020 void
1021 interface_ip_set_ula_prefix(const char *prefix)
1022 {
1023         char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
1024         if (prefix)
1025                 strncpy(buf, prefix, sizeof(buf) - 1);
1026         char *prefixaddr = strtok_r(buf, "/", &saveptr);
1027
1028         struct in6_addr addr;
1029         if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
1030                 if (ula_prefix) {
1031                         interface_update_prefix(NULL, NULL, &ula_prefix->node);
1032                         ula_prefix = NULL;
1033                 }
1034                 return;
1035         }
1036
1037         int length;
1038         char *prefixlen = strtok_r(NULL, ",", &saveptr);
1039         if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
1040                 return;
1041
1042         if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
1043                         ula_prefix->length != length) {
1044                 if (ula_prefix)
1045                         interface_update_prefix(NULL, NULL, &ula_prefix->node);
1046
1047                 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
1048                                 0, 0, NULL, 0, NULL);
1049         }
1050 }
1051
1052 void
1053 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
1054 {
1055         struct dns_server *s;
1056
1057         s = calloc(1, sizeof(*s));
1058         if (!s)
1059                 return;
1060
1061         s->af = AF_INET;
1062         if (inet_pton(s->af, str, &s->addr.in))
1063                 goto add;
1064
1065         s->af = AF_INET6;
1066         if (inet_pton(s->af, str, &s->addr.in))
1067                 goto add;
1068
1069         free(s);
1070         return;
1071
1072 add:
1073         D(INTERFACE, "Add IPv%c DNS server: %s\n",
1074           s->af == AF_INET6 ? '6' : '4', str);
1075         vlist_simple_add(&ip->dns_servers, &s->node);
1076 }
1077
1078 void
1079 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
1080 {
1081         struct blob_attr *cur;
1082         int rem;
1083
1084         blobmsg_for_each_attr(cur, list, rem) {
1085                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1086                         continue;
1087
1088                 if (!blobmsg_check_attr(cur, NULL))
1089                         continue;
1090
1091                 interface_add_dns_server(ip, blobmsg_data(cur));
1092         }
1093 }
1094
1095 static void
1096 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
1097 {
1098         struct dns_search_domain *s;
1099         int len = strlen(str);
1100
1101         s = calloc(1, sizeof(*s) + len + 1);
1102         if (!s)
1103                 return;
1104
1105         D(INTERFACE, "Add DNS search domain: %s\n", str);
1106         memcpy(s->name, str, len);
1107         vlist_simple_add(&ip->dns_search, &s->node);
1108 }
1109
1110 void
1111 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
1112 {
1113         struct blob_attr *cur;
1114         int rem;
1115
1116         blobmsg_for_each_attr(cur, list, rem) {
1117                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1118                         continue;
1119
1120                 if (!blobmsg_check_attr(cur, NULL))
1121                         continue;
1122
1123                 interface_add_dns_search_domain(ip, blobmsg_data(cur));
1124         }
1125 }
1126
1127 static void
1128 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip, const char *dev)
1129 {
1130         struct dns_server *s;
1131         struct dns_search_domain *d;
1132         const char *str;
1133         char buf[INET6_ADDRSTRLEN];
1134
1135         vlist_simple_for_each_element(&ip->dns_servers, s, node) {
1136                 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
1137                 if (!str)
1138                         continue;
1139
1140                 if (s->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&s->addr.in6))
1141                         fprintf(f, "nameserver %s%%%s\n", str, dev);
1142                 else
1143                         fprintf(f, "nameserver %s\n", str);
1144         }
1145
1146         vlist_simple_for_each_element(&ip->dns_search, d, node) {
1147                 fprintf(f, "search %s\n", d->name);
1148         }
1149 }
1150
1151 void
1152 interface_write_resolv_conf(void)
1153 {
1154         struct interface *iface;
1155         char *path = alloca(strlen(resolv_conf) + 5);
1156         FILE *f;
1157         uint32_t crcold, crcnew;
1158
1159         sprintf(path, "%s.tmp", resolv_conf);
1160         unlink(path);
1161         f = fopen(path, "w+");
1162         if (!f) {
1163                 D(INTERFACE, "Failed to open %s for writing\n", path);
1164                 return;
1165         }
1166
1167         vlist_for_each_element(&interfaces, iface, node) {
1168                 if (iface->state != IFS_UP)
1169                         continue;
1170
1171                 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
1172                     vlist_simple_empty(&iface->proto_ip.dns_servers) &&
1173                         vlist_simple_empty(&iface->config_ip.dns_search) &&
1174                     vlist_simple_empty(&iface->config_ip.dns_servers))
1175                         continue;
1176
1177                 fprintf(f, "# Interface %s\n", iface->name);
1178                 write_resolv_conf_entries(f, &iface->config_ip, iface->ifname);
1179                 if (!iface->proto_ip.no_dns)
1180                         write_resolv_conf_entries(f, &iface->proto_ip, iface->ifname);
1181         }
1182         fflush(f);
1183         rewind(f);
1184         crcnew = crc32_file(f);
1185         fclose(f);
1186
1187         crcold = crcnew + 1;
1188         f = fopen(resolv_conf, "r");
1189         if (f) {
1190                 crcold = crc32_file(f);
1191                 fclose(f);
1192         }
1193
1194         if (crcold == crcnew) {
1195                 unlink(path);
1196         } else if (rename(path, resolv_conf) < 0) {
1197                 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
1198                 unlink(path);
1199         }
1200 }
1201
1202 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
1203 {
1204         struct device_addr *addr;
1205         struct device_route *route;
1206         struct device *dev;
1207         struct interface *iface;
1208
1209         ip->enabled = enabled;
1210         iface = ip->iface;
1211         dev = iface->l3_dev.dev;
1212         if (!dev)
1213                 return;
1214
1215         vlist_for_each_element(&ip->addr, addr, node) {
1216                 if (addr->enabled == enabled)
1217                         continue;
1218
1219                 if (enabled) {
1220                         system_add_address(dev, addr);
1221                         if (iface->metric)
1222                                 interface_handle_subnet_route(iface, addr, true);
1223                 } else {
1224                         interface_handle_subnet_route(iface, addr, false);
1225                         system_del_address(dev, addr);
1226                 }
1227                 addr->enabled = enabled;
1228         }
1229
1230         vlist_for_each_element(&ip->route, route, node) {
1231                 bool _enabled = enabled;
1232
1233                 if (!enable_route(ip, route))
1234                         _enabled = false;
1235
1236                 if (route->enabled == _enabled)
1237                         continue;
1238
1239                 if (_enabled) {
1240                         if (!(route->flags & DEVROUTE_METRIC))
1241                                 route->metric = ip->iface->metric;
1242
1243                         if (!(route->flags & DEVROUTE_TABLE)) {
1244                                 route->flags &= ~DEVROUTE_SRCTABLE;
1245                                 route->table = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6) ?
1246                                                         iface->ip6table : iface->ip4table;
1247
1248                                 if (route->table)
1249                                         route->flags |= DEVROUTE_SRCTABLE;
1250                         }
1251
1252                         if (system_add_route(dev, route))
1253                                 route->failed = true;
1254                 } else
1255                         system_del_route(dev, route);
1256                 route->enabled = _enabled;
1257         }
1258
1259         struct device_prefix *c;
1260         struct device_prefix_assignment *a;
1261         list_for_each_entry(c, &prefixes, head)
1262                 list_for_each_entry(a, &c->assignments, head)
1263                         if (!strcmp(a->name, ip->iface->name))
1264                                 interface_set_prefix_address(a, c, ip->iface, enabled);
1265
1266         if (ip->iface && ip->iface->l3_dev.dev)
1267                 set_ip_source_policy(enabled, true, IPRULE_PRIORITY_REJECT + ip->iface->l3_dev.dev->ifindex,
1268                         NULL, 0, 0, ip->iface, "failed_policy");
1269 }
1270
1271 void
1272 interface_ip_update_start(struct interface_ip_settings *ip)
1273 {
1274         if (ip != &ip->iface->config_ip) {
1275                 vlist_simple_update(&ip->dns_servers);
1276                 vlist_simple_update(&ip->dns_search);
1277         }
1278         vlist_update(&ip->route);
1279         vlist_update(&ip->addr);
1280         vlist_update(&ip->prefix);
1281 }
1282
1283 void
1284 interface_ip_update_complete(struct interface_ip_settings *ip)
1285 {
1286         vlist_simple_flush(&ip->dns_servers);
1287         vlist_simple_flush(&ip->dns_search);
1288         vlist_flush(&ip->route);
1289         vlist_flush(&ip->addr);
1290         vlist_flush(&ip->prefix);
1291         interface_write_resolv_conf();
1292 }
1293
1294 void
1295 interface_ip_flush(struct interface_ip_settings *ip)
1296 {
1297         if (ip == &ip->iface->proto_ip)
1298                 vlist_flush_all(&ip->iface->host_routes);
1299         vlist_simple_flush_all(&ip->dns_servers);
1300         vlist_simple_flush_all(&ip->dns_search);
1301         vlist_flush_all(&ip->route);
1302         vlist_flush_all(&ip->addr);
1303         vlist_flush_all(&ip->prefix);
1304 }
1305
1306 static void
1307 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1308 {
1309         ip->iface = iface;
1310         ip->enabled = true;
1311         vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1312         vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1313         vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1314         vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1315         vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1316 }
1317
1318 void
1319 interface_ip_init(struct interface *iface)
1320 {
1321         __interface_ip_init(&iface->proto_ip, iface);
1322         __interface_ip_init(&iface->config_ip, iface);
1323         vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1324 }
1325
1326 static void
1327 interface_ip_valid_until_handler(struct uloop_timeout *t)
1328 {
1329         time_t now = system_get_rtime();
1330         struct interface *iface;
1331         vlist_for_each_element(&interfaces, iface, node) {
1332                 if (iface->state != IFS_UP)
1333                         continue;
1334
1335                 struct device_addr *addr, *addrp;
1336                 struct device_route *route, *routep;
1337                 struct device_prefix *pref, *prefp;
1338
1339                 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1340                         if (addr->valid_until && addr->valid_until < now)
1341                                 vlist_delete(&iface->proto_ip.addr, &addr->node);
1342
1343                 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1344                         if (route->valid_until && route->valid_until < now)
1345                                 vlist_delete(&iface->proto_ip.route, &route->node);
1346
1347                 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1348                         if (pref->valid_until && pref->valid_until < now)
1349                                 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1350
1351         }
1352
1353         uloop_timeout_set(t, 1000);
1354 }
1355
1356 static void __init
1357 interface_ip_init_worker(void)
1358 {
1359         valid_until_timeout.cb = interface_ip_valid_until_handler;
1360         uloop_timeout_set(&valid_until_timeout, 1000);
1361 }