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 int set_ip_lo_policy(bool add, bool v6, struct interface *iface)
 137 {
 138         struct iprule rule = {
 139                 .flags = IPRULE_IN | IPRULE_LOOKUP | IPRULE_PRIORITY,
 140                 .priority = IPRULE_PRIORITY_NW + iface->l3_dev.dev->ifindex,
 141                 .lookup = (v6) ? iface->ip6table : iface->ip4table,
 142                 .in_dev = "lo"
 143         };
 144
 145         if (!rule.lookup)
 146                 return 0;
 147
 148         rule.flags |= (v6) ? IPRULE_INET6 : IPRULE_INET4;
 149
 150         return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
 151 }
 152
 153 static bool
 154 __find_ip_addr_target(struct interface_ip_settings *ip, union if_addr *a, bool v6)
 155 {
 156         struct device_addr *addr;
 157
 158         vlist_for_each_element(&ip->addr, addr, node) {
 159                 if (!addr->enabled)
 160                         continue;
 161
 162                 if (v6 != ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
 163                         continue;
 164
 165                 // Handle offlink addresses correctly
 166                 unsigned int mask = addr->mask;
 167                 if ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6 &&
 168                                 (addr->flags & DEVADDR_OFFLINK))
 169                         mask = 128;
 170
 171                 if (!match_if_addr(&addr->addr, a, mask))
 172                         continue;
 173
 174                 return true;
 175         }
 176
 177         return false;
 178 }
 179
 180 static void
 181 __find_ip_route_target(struct interface_ip_settings *ip, union if_addr *a,
 182                        bool v6, struct device_route **res)
 183 {
 184         struct device_route *route;
 185
 186         vlist_for_each_element(&ip->route, route, node) {
 187                 if (!route->enabled)
 188                         continue;
 189
 190                 if (v6 != ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
 191                         continue;
 192
 193                 if (!match_if_addr(&route->addr, a, route->mask))
 194                         continue;
 195
 196                 if (route->flags & DEVROUTE_TABLE)
 197                         continue;
 198
 199                 if (!*res || route->mask < (*res)->mask)
 200                         *res = route;
 201         }
 202 }
 203
 204 static bool
 205 interface_ip_find_addr_target(struct interface *iface, union if_addr *a, bool v6)
 206 {
 207         return __find_ip_addr_target(&iface->proto_ip, a, v6) ||
 208                __find_ip_addr_target(&iface->config_ip, a, v6);
 209 }
 210
 211 static void
 212 interface_ip_find_route_target(struct interface *iface, union if_addr *a,
 213                                bool v6, struct device_route **route)
 214 {
 215         __find_ip_route_target(&iface->proto_ip, a, v6, route);
 216         __find_ip_route_target(&iface->config_ip, a, v6, route);
 217 }
 218
 219 struct interface *
 220 interface_ip_add_target_route(union if_addr *addr, bool v6, struct interface *iface)
 221 {
 222         struct device_route *route, *r_next = NULL;
 223         bool defaultroute_target = false;
 224         int addrsize = v6 ? sizeof(addr->in6) : sizeof(addr->in);
 225
 226         route = calloc(1, sizeof(*route));
 227         if (!route)
 228                 return NULL;
 229
 230         route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
 231         route->mask = v6 ? 128 : 32;
 232         if (memcmp(&route->addr, addr, addrsize) == 0)
 233                 defaultroute_target = true;
 234         else
 235                 memcpy(&route->addr, addr, addrsize);
 236
 237         if (iface) {
 238                 /* look for locally addressable target first */
 239                 if (interface_ip_find_addr_target(iface, addr, v6))
 240                         goto done;
 241
 242                 /* do not stop at the first route, let the lookup compare
 243                  * masks to find the best match */
 244                 interface_ip_find_route_target(iface, addr, v6, &r_next);
 245         } else {
 246                 vlist_for_each_element(&interfaces, iface, node) {
 247                         /* look for locally addressable target first */
 248                         if (interface_ip_find_addr_target(iface, addr, v6))
 249                                 goto done;
 250
 251                         /* do not stop at the first route, let the lookup compare
 252                          * masks to find the best match */
 253                         interface_ip_find_route_target(iface, addr, v6, &r_next);
 254                 }
 255         }
 256
 257         if (!r_next) {
 258                 free(route);
 259                 return NULL;
 260         }
 261
 262         iface = r_next->iface;
 263         memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
 264         route->mtu = r_next->mtu;
 265         route->metric = r_next->metric;
 266         route->table = r_next->table;
 267
 268 done:
 269         route->iface = iface;
 270         if (defaultroute_target)
 271                 free(route);
 272         else
 273                 vlist_add(&iface->host_routes, &route->node, route);
 274         return iface;
 275 }
 276
 277 static void
 278 interface_set_route_info(struct interface *iface, struct device_route *route)
 279 {
 280         bool v6 = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6);
 281
 282         if (!iface)
 283                 return;
 284
 285         if (!(route->flags & DEVROUTE_METRIC))
 286                 route->metric = iface->metric;
 287
 288         if (!(route->flags & DEVROUTE_TABLE)) {
 289                 route->table = (v6) ? iface->ip6table : iface->ip4table;
 290                 if (route->table)
 291                         route->flags |= DEVROUTE_SRCTABLE;
 292         }
 293 }
 294
 295 void
 296 interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
 297 {
 298         struct interface_ip_settings *ip;
 299         struct blob_attr *tb[__ROUTE_MAX], *cur;
 300         struct device_route *route;
 301         int af = v6 ? AF_INET6 : AF_INET;
 302
 303         blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
 304
 305         if (!iface) {
 306                 if ((cur = tb[ROUTE_INTERFACE]) == NULL)
 307                         return;
 308
 309                 iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
 310                 if (!iface)
 311                         return;
 312
 313                 ip = &iface->config_ip;
 314         } else {
 315                 ip = &iface->proto_ip;
 316         }
 317
 318         route = calloc(1, sizeof(*route));
 319         if (!route)
 320                 return;
 321
 322         route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
 323         route->mask = v6 ? 128 : 32;
 324         if ((cur = tb[ROUTE_MASK]) != NULL) {
 325                 route->mask = parse_netmask_string(blobmsg_data(cur), v6);
 326                 if (route->mask > (v6 ? 128 : 32))
 327                         goto error;
 328         }
 329
 330         if ((cur = tb[ROUTE_TARGET]) != NULL) {
 331                 if (!parse_ip_and_netmask(af, blobmsg_data(cur), &route->addr, &route->mask)) {
 332                         DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
 333                         goto error;
 334                 }
 335         }
 336
 337         if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
 338                 if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
 339                         DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
 340                         goto error;
 341                 }
 342         }
 343
 344         if ((cur = tb[ROUTE_METRIC]) != NULL) {
 345                 route->metric = blobmsg_get_u32(cur);
 346                 route->flags |= DEVROUTE_METRIC;
 347         }
 348
 349         if ((cur = tb[ROUTE_MTU]) != NULL) {
 350                 route->mtu = blobmsg_get_u32(cur);
 351                 route->flags |= DEVROUTE_MTU;
 352         }
 353
 354         // Use source-based routing
 355         if ((cur = tb[ROUTE_SOURCE]) != NULL) {
 356                 char *saveptr, *source = alloca(blobmsg_data_len(cur));
 357                 memcpy(source, blobmsg_data(cur), blobmsg_data_len(cur));
 358
 359                 const char *addr = strtok_r(source, "/", &saveptr);
 360                 const char *mask = strtok_r(NULL, "/", &saveptr);
 361
 362                 if (!addr || inet_pton(af, addr, &route->source) < 1) {
 363                         DPRINTF("Failed to parse route source: %s\n", addr);
 364                         goto error;
 365                 }
 366
 367                 route->sourcemask = (mask) ? atoi(mask) : ((af == AF_INET6) ? 128 : 32);
 368         }
 369
 370         if ((cur = tb[ROUTE_ONLINK]) != NULL && blobmsg_get_bool(cur))
 371                 route->flags |= DEVROUTE_ONLINK;
 372
 373         if ((cur = tb[ROUTE_TABLE]) != NULL) {
 374                 if (!system_resolve_rt_table(blobmsg_data(cur), &route->table)) {
 375                         DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
 376                         goto error;
 377                 }
 378
 379                 /* only set the table flag if not using the main (default) table */
 380                 if (system_is_default_rt_table(route->table))
 381                         route->table = 0;
 382
 383                 if (route->table)
 384                         route->flags |= DEVROUTE_TABLE;
 385         }
 386
 387         if ((cur = tb[ROUTE_VALID]) != NULL) {
 388                 int64_t valid = blobmsg_get_u32(cur);
 389                 int64_t valid_until = valid + (int64_t)system_get_rtime();
 390                 if (valid_until <= LONG_MAX && valid != 0xffffffffLL) // Catch overflow
 391                         route->valid_until = valid_until;
 392         }
 393
 394         if ((cur = tb[ROUTE_TYPE]) != NULL) {
 395                 if (!system_resolve_rt_type(blobmsg_data(cur), &route->type)) {
 396                         DPRINTF("Failed to resolve routing type: %s\n", (char *) blobmsg_data(cur));
 397                         goto error;
 398                 }
 399                 route->flags |= DEVROUTE_TYPE;
 400         }
 401
 402         interface_set_route_info(iface, route);
 403         vlist_add(&ip->route, &route->node, route);
 404         return;
 405
 406 error:
 407         free(route);
 408 }
 409
 410 static int
 411 addr_cmp(const void *k1, const void *k2, void *ptr)
 412 {
 413         return memcmp(k1, k2, sizeof(struct device_addr) -
 414                       offsetof(struct device_addr, flags));
 415 }
 416
 417 static int
 418 route_cmp(const void *k1, const void *k2, void *ptr)
 419 {
 420         const struct device_route *r1 = k1, *r2 = k2;
 421
 422         if (r1->mask != r2->mask)
 423                 return r2->mask - r1->mask;
 424
 425         if (r1->metric != r2->metric)
 426                 return r1->metric - r2->metric;
 427
 428         if (r1->flags != r2->flags)
 429                 return r2->flags - r1->flags;
 430
 431         if (r1->sourcemask != r2->sourcemask)
 432                 return r1->sourcemask - r2->sourcemask;
 433
 434         if (r1->table != r2->table)
 435                 return r1->table - r2->table;
 436
 437         int maskcmp = memcmp(&r1->source, &r2->source, sizeof(r1->source));
 438         if (maskcmp)
 439                 return maskcmp;
 440
 441         return memcmp(&r1->addr, &r2->addr, sizeof(r1->addr));
 442 }
 443
 444 static int
 445 prefix_cmp(const void *k1, const void *k2, void *ptr)
 446 {
 447         return memcmp(k1, k2, offsetof(struct device_prefix, pclass) -
 448                         offsetof(struct device_prefix, addr));
 449 }
 450
 451 static void
 452 interface_handle_subnet_route(struct interface *iface, struct device_addr *addr, bool add)
 453 {
 454         struct device *dev = iface->l3_dev.dev;
 455         struct device_route *r = &addr->subnet;
 456
 457         if (addr->flags & DEVADDR_OFFLINK)
 458                 return;
 459
 460         if (!add) {
 461                 if (!addr->subnet.iface)
 462                         return;
 463
 464                 system_del_route(dev, r);
 465                 memset(r, 0, sizeof(*r));
 466                 return;
 467         }
 468
 469         r->iface = iface;
 470         r->flags = addr->flags;
 471         r->mask = addr->mask;
 472         memcpy(&r->addr, &addr->addr, sizeof(r->addr));
 473         clear_if_addr(&r->addr, r->mask);
 474
 475         r->flags |= DEVADDR_KERNEL;
 476         system_del_route(dev, r);
 477
 478         r->flags &= ~DEVADDR_KERNEL;
 479         interface_set_route_info(iface, r);
 480
 481         system_add_route(dev, r);
 482 }
 483
 484 static void
 485 interface_update_proto_addr(struct vlist_tree *tree,
 486                             struct vlist_node *node_new,
 487                             struct vlist_node *node_old)
 488 {
 489         struct interface_ip_settings *ip;
 490         struct interface *iface;
 491         struct device *dev;
 492         struct device_addr *a_new = NULL, *a_old = NULL;
 493         bool replace = false;
 494         bool keep = false;
 495         bool v6 = false;
 496
 497         ip = container_of(tree, struct interface_ip_settings, addr);
 498         iface = ip->iface;
 499         dev = iface->l3_dev.dev;
 500
 501         if (!node_new || !node_old)
 502                 iface->updated |= IUF_ADDRESS;
 503
 504         if (node_new) {
 505                 a_new = container_of(node_new, struct device_addr, node);
 506
 507                 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
 508                     !a_new->broadcast) {
 509
 510                         /* /31 and /32 addressing need 255.255.255.255
 511                          * as broadcast address. */
 512                         if (a_new->mask >= 31) {
 513                                 a_new->broadcast = (uint32_t) ~0;
 514                         } else {
 515                                 uint32_t mask = ~0;
 516                                 uint32_t *a = (uint32_t *) &a_new->addr;
 517
 518                                 mask >>= a_new->mask;
 519                                 a_new->broadcast = *a | htonl(mask);
 520                         }
 521                 }
 522         }
 523
 524         if (node_old)
 525                 a_old = container_of(node_old, struct device_addr, node);
 526
 527         if (a_new && a_old) {
 528                 keep = true;
 529
 530                 if (a_old->flags != a_new->flags || a_old->failed)
 531                         keep = false;
 532
 533                 if (a_old->valid_until != a_new->valid_until ||
 534                                 a_old->preferred_until != a_new->preferred_until)
 535                         replace = true;
 536
 537                 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
 538                     a_new->broadcast != a_old->broadcast)
 539                         keep = false;
 540         }
 541
 542         if (node_old) {
 543                 if (a_old->enabled && !keep) {
 544                         if ((a_old->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
 545                                 v6 = true;
 546
 547                         //This is needed for source routing to work correctly. If a device
 548                         //has two connections to a network using the same subnet, adding
 549                         //only the network-rule will cause packets to be routed through the
 550                         //first matching network (source IP matches both masks).
 551                         if (a_old->policy_table)
 552                                 set_ip_source_policy(false, v6, IPRULE_PRIORITY_ADDR, &a_old->addr,
 553                                                 (v6) ? 128 : 32, a_old->policy_table, NULL, NULL);
 554
 555                         if (!(a_old->flags & DEVADDR_EXTERNAL)) {
 556                                 interface_handle_subnet_route(iface, a_old, false);
 557                                 system_del_address(dev, a_old);
 558                         }
 559                 }
 560                 free(a_old->pclass);
 561                 free(a_old);
 562         }
 563
 564         if (node_new) {
 565                 a_new->enabled = true;
 566
 567                 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
 568                                 v6 = true;
 569
 570                 a_new->policy_table = (v6) ? iface->ip6table : iface->ip4table;
 571
 572                 if (!keep || replace) {
 573                         if (!(a_new->flags & DEVADDR_EXTERNAL)) {
 574                                 if (system_add_address(dev, a_new))
 575                                         a_new->failed = true;
 576
 577                                 if (iface->metric || a_new->policy_table)
 578                                         interface_handle_subnet_route(iface, a_new, true);
 579                         }
 580
 581                         if (!keep) {
 582                                 if (a_new->policy_table)
 583                                         set_ip_source_policy(true, v6, IPRULE_PRIORITY_ADDR, &a_new->addr,
 584                                                         (v6) ? 128 : 32, a_new->policy_table, NULL, NULL);
 585                         }
 586                 }
 587         }
 588 }
 589
 590 static bool
 591 enable_route(struct interface_ip_settings *ip, struct device_route *route)
 592 {
 593         if (ip->no_defaultroute && !route->mask)
 594                 return false;
 595
 596         return ip->enabled;
 597 }
 598
 599 static void
 600 interface_update_proto_route(struct vlist_tree *tree,
 601                              struct vlist_node *node_new,
 602                              struct vlist_node *node_old)
 603 {
 604         struct interface_ip_settings *ip;
 605         struct interface *iface;
 606         struct device *dev;
 607         struct device_route *route_old, *route_new;
 608         bool keep = false;
 609
 610         ip = container_of(tree, struct interface_ip_settings, route);
 611         iface = ip->iface;
 612         dev = iface->l3_dev.dev;
 613
 614         if (!node_new || !node_old)
 615                 iface->updated |= IUF_ROUTE;
 616
 617         route_old = container_of(node_old, struct device_route, node);
 618         route_new = container_of(node_new, struct device_route, node);
 619
 620         if (node_old && node_new)
 621                 keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop)) &&
 622                         (route_old->mtu == route_new->mtu) && (route_old->type == route_new->type) &&
 623                         !route_old->failed;
 624
 625         if (node_old) {
 626                 if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
 627                         system_del_route(dev, route_old);
 628
 629                 free(route_old);
 630         }
 631
 632         if (node_new) {
 633                 bool _enabled = enable_route(ip, route_new);
 634
 635                 if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
 636                         if (system_add_route(dev, route_new))
 637                                 route_new->failed = true;
 638
 639                 route_new->iface = iface;
 640                 route_new->enabled = _enabled;
 641         }
 642 }
 643
 644 static void
 645 interface_update_host_route(struct vlist_tree *tree,
 646                              struct vlist_node *node_new,
 647                              struct vlist_node *node_old)
 648 {
 649         struct interface *iface;
 650         struct device *dev;
 651         struct device_route *route_old, *route_new;
 652
 653         iface = container_of(tree, struct interface, host_routes);
 654         dev = iface->l3_dev.dev;
 655
 656         route_old = container_of(node_old, struct device_route, node);
 657         route_new = container_of(node_new, struct device_route, node);
 658
 659         if (node_old) {
 660                 system_del_route(dev, route_old);
 661                 free(route_old);
 662         }
 663
 664         if (node_new) {
 665                 if (system_add_route(dev, route_new))
 666                         route_new->failed = true;
 667         }
 668 }
 669
 670 static void
 671 random_ifaceid(struct in6_addr *addr)
 672 {
 673         static bool initialized = false;
 674         struct timeval t;
 675
 676         if (!initialized) {
 677                 long int seed = 0;
 678                 gettimeofday(&t, NULL);
 679                 seed = t.tv_sec ^ t.tv_usec ^ getpid();
 680                 srand48(seed);
 681                 initialized = true;
 682         }
 683         addr->s6_addr32[2] = (uint32_t)mrand48();
 684         addr->s6_addr32[3] = (uint32_t)mrand48();
 685 }
 686
 687 static void
 688 eui64_ifaceid(struct interface *iface, struct in6_addr *addr)
 689 {
 690         /* get mac address */
 691         uint8_t *macaddr = iface->l3_dev.dev->settings.macaddr;
 692         uint8_t *ifaceid = addr->s6_addr + 8;
 693         memcpy(ifaceid,macaddr,3);
 694         memcpy(ifaceid + 5,macaddr + 3, 3);
 695         ifaceid[3] = 0xff;
 696         ifaceid[4] = 0xfe;
 697         ifaceid[0] ^= 0x02;
 698 }
 699
 700 static void
 701 generate_ifaceid(struct interface *iface, struct in6_addr *addr)
 702 {
 703         /* generate new iface id */
 704         switch (iface->assignment_iface_id_selection) {
 705         case IFID_FIXED:
 706                 /* fixed */
 707                 /* copy host part from assignment_fixed_iface_id */
 708                 memcpy(addr->s6_addr + 8, iface->assignment_fixed_iface_id.s6_addr + 8, 8);
 709                 break;
 710         case IFID_RANDOM:
 711                 /* randomize last 64 bits */
 712                 random_ifaceid(addr);
 713                 break;
 714         case IFID_EUI64:
 715                 /* eui64 */
 716                 eui64_ifaceid(iface, addr);
 717                 break;
 718         }
 719 }
 720
 721 static void
 722 interface_set_prefix_address(struct device_prefix_assignment *assignment,
 723                 const struct device_prefix *prefix, struct interface *iface, bool add)
 724 {
 725         const struct interface *uplink = prefix->iface;
 726         if (!iface->l3_dev.dev)
 727                 return;
 728
 729         struct device *l3_downlink = iface->l3_dev.dev;
 730
 731         struct device_addr addr;
 732         struct device_route route;
 733         memset(&addr, 0, sizeof(addr));
 734         memset(&route, 0, sizeof(route));
 735
 736         if (IN6_IS_ADDR_UNSPECIFIED(&assignment->addr)) {
 737                 addr.addr.in6 = prefix->addr;
 738                 addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
 739                 generate_ifaceid(iface, &addr.addr.in6);
 740                 assignment->addr = addr.addr.in6;
 741         }
 742         else
 743                 addr.addr.in6 = assignment->addr;
 744
 745         addr.mask = assignment->length;
 746         addr.flags = DEVADDR_INET6 | DEVADDR_OFFLINK;
 747         addr.preferred_until = prefix->preferred_until;
 748         addr.valid_until = prefix->valid_until;
 749
 750         route.flags = DEVADDR_INET6;
 751         route.mask = addr.mask < 64 ? 64 : addr.mask;
 752         route.addr = addr.addr;
 753         clear_if_addr(&route.addr, route.mask);
 754         interface_set_route_info(iface, &route);
 755
 756         if (!add && assignment->enabled) {
 757                 time_t now = system_get_rtime();
 758                 addr.preferred_until = now;
 759                 if (!addr.valid_until || addr.valid_until - now > 7200)
 760                         addr.valid_until = now + 7200;
 761
 762                 if (prefix->iface) {
 763                         if (prefix->iface->ip6table)
 764                                 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW, &addr.addr,
 765                                                 addr.mask, prefix->iface->ip6table, iface, NULL);
 766
 767                         set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT, &addr.addr,
 768                                                         addr.mask, 0, iface, "unreachable");
 769                 }
 770
 771                 system_del_route(l3_downlink, &route);
 772                 system_add_address(l3_downlink, &addr);
 773
 774                 assignment->enabled = false;
 775         } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP) &&
 776                         !system_add_address(l3_downlink, &addr)) {
 777
 778                 if (prefix->iface && !assignment->enabled) {
 779                         set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT, &addr.addr,
 780                                         addr.mask, 0, iface, "unreachable");
 781
 782                         if (prefix->iface->ip6table)
 783                                 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW, &addr.addr,
 784                                                 addr.mask, prefix->iface->ip6table, iface, NULL);
 785                 }
 786
 787                 route.metric = iface->metric;
 788                 system_add_route(l3_downlink, &route);
 789
 790                 if (uplink && uplink->l3_dev.dev && !(l3_downlink->settings.flags & DEV_OPT_MTU6)) {
 791                         int mtu = system_update_ipv6_mtu(uplink->l3_dev.dev, 0);
 792                         int mtu_old = system_update_ipv6_mtu(l3_downlink, 0);
 793
 794                         if (mtu > 0 && mtu_old > mtu)
 795                                 system_update_ipv6_mtu(l3_downlink, mtu);
 796                 }
 797
 798                 assignment->enabled = true;
 799         }
 800 }
 801
 802 static bool interface_prefix_assign(struct list_head *list,
 803                 struct device_prefix_assignment *assign)
 804 {
 805         int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
 806         struct device_prefix_assignment *c;
 807         list_for_each_entry(c, list, head) {
 808                 if (assign->assigned != -1) {
 809                         if (assign->assigned >= current && assign->assigned + asize < c->assigned) {
 810                                 list_add_tail(&assign->head, &c->head);
 811                                 return true;
 812                         }
 813                 } else if (assign->assigned == -1) {
 814                         current = (current + asize) & (~asize);
 815                         if (current + asize < c->assigned) {
 816                                 assign->assigned = current;
 817                                 list_add_tail(&assign->head, &c->head);
 818                                 return true;
 819                         }
 820                 }
 821                 current = (c->assigned + (1 << (64 - c->length)));
 822         }
 823         return false;
 824 }
 825
 826 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
 827 {
 828         struct device_prefix_assignment *c;
 829         struct interface *iface;
 830
 831         // Delete all assignments
 832         while (!list_empty(&prefix->assignments)) {
 833                 c = list_first_entry(&prefix->assignments,
 834                                 struct device_prefix_assignment, head);
 835                 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
 836                         interface_set_prefix_address(c, prefix, iface, false);
 837                 list_del(&c->head);
 838                 free(c);
 839         }
 840
 841         if (!setup)
 842                 return;
 843
 844         // End-of-assignment sentinel
 845         c = malloc(sizeof(*c) + 1);
 846         c->assigned = 1 << (64 - prefix->length);
 847         c->length = 64;
 848         c->name[0] = 0;
 849         c->addr = in6addr_any;
 850         list_add(&c->head, &prefix->assignments);
 851
 852         // Excluded prefix
 853         if (prefix->excl_length > 0) {
 854                 const char name[] = "!excluded";
 855                 c = malloc(sizeof(*c) + sizeof(name));
 856                 c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
 857                                 ((1 << (64 - prefix->length)) - 1);
 858                 c->length = prefix->excl_length;
 859                 c->addr = in6addr_any;
 860                 memcpy(c->name, name, sizeof(name));
 861                 list_add(&c->head, &prefix->assignments);
 862         }
 863
 864         bool assigned_any = false;
 865         struct list_head assign_later = LIST_HEAD_INIT(assign_later);
 866         vlist_for_each_element(&interfaces, iface, node) {
 867                 if (iface->assignment_length < 48 ||
 868                                 iface->assignment_length > 64)
 869                         continue;
 870
 871                 // Test whether there is a matching class
 872                 if (!list_empty(&iface->assignment_classes)) {
 873                         bool found = false;
 874
 875                         struct interface_assignment_class *c;
 876                         list_for_each_entry(c, &iface->assignment_classes, head) {
 877                                 if (!strcmp(c->name, prefix->pclass)) {
 878                                         found = true;
 879                                         break;
 880                                 }
 881                         }
 882
 883                         if (!found)
 884                                 continue;
 885                 }
 886
 887                 size_t namelen = strlen(iface->name) + 1;
 888                 c = malloc(sizeof(*c) + namelen);
 889                 c->length = iface->assignment_length;
 890                 c->assigned = iface->assignment_hint;
 891                 c->addr = in6addr_any;
 892                 c->enabled = false;
 893                 memcpy(c->name, iface->name, namelen);
 894
 895                 // First process all custom assignments, put all others in later-list
 896                 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
 897                         if (c->assigned != -1) {
 898                                 c->assigned = -1;
 899                                 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
 900                                                 "of size %hhu for %s, trying other\n", c->length, c->name);
 901                         }
 902
 903                         struct list_head *next = &assign_later;
 904                         struct device_prefix_assignment *n;
 905                         list_for_each_entry(n, &assign_later, head) {
 906                                 if (n->length < c->length) {
 907                                         next = &n->head;
 908                                         break;
 909                                 }
 910                         }
 911                         list_add_tail(&c->head, next);
 912                 }
 913
 914                 if (c->assigned != -1)
 915                         assigned_any = true;
 916         }
 917
 918         // Then try to assign all other + failed custom assignments
 919         while (!list_empty(&assign_later)) {
 920                 c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
 921                 list_del(&c->head);
 922
 923                 bool assigned = false;
 924                 do {
 925                         assigned = interface_prefix_assign(&prefix->assignments, c);
 926                 } while (!assigned && ++c->length <= 64);
 927
 928                 if (!assigned) {
 929                         netifd_log_message(L_WARNING, "Failed to assign subprefix "
 930                                         "of size %hhu for %s\n", c->length, c->name);
 931                         free(c);
 932                 } else {
 933                         assigned_any = true;
 934                 }
 935         }
 936
 937         list_for_each_entry(c, &prefix->assignments, head)
 938                 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
 939                         interface_set_prefix_address(c, prefix, iface, true);
 940
 941         if (!assigned_any)
 942                 netifd_log_message(L_WARNING, "You have delegated IPv6-prefixes but haven't assigned them "
 943                                 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
 944 }
 945
 946
 947 void interface_refresh_assignments(bool hint)
 948 {
 949         static bool refresh = false;
 950         if (!hint && refresh) {
 951                 struct device_prefix *p;
 952                 list_for_each_entry(p, &prefixes, head)
 953                         interface_update_prefix_assignments(p, true);
 954         }
 955         refresh = hint;
 956 }
 957
 958
 959 static void
 960 interface_update_prefix(struct vlist_tree *tree,
 961                              struct vlist_node *node_new,
 962                              struct vlist_node *node_old)
 963 {
 964         struct device_prefix *prefix_old, *prefix_new;
 965         prefix_old = container_of(node_old, struct device_prefix, node);
 966         prefix_new = container_of(node_new, struct device_prefix, node);
 967
 968         struct interface_ip_settings *ip = container_of(tree, struct interface_ip_settings, prefix);
 969         if (tree && (!node_new || !node_old))
 970                 ip->iface->updated |= IUF_PREFIX;
 971
 972         struct device_route route;
 973         memset(&route, 0, sizeof(route));
 974         route.flags = DEVADDR_INET6;
 975         route.metric = INT32_MAX;
 976         route.mask = (node_new) ? prefix_new->length : prefix_old->length;
 977         route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
 978
 979
 980         struct device_prefix_assignment *c;
 981         struct interface *iface;
 982
 983         if (node_old && node_new) {
 984                 // Move assignments and refresh addresses to update valid times
 985                 list_splice(&prefix_old->assignments, &prefix_new->assignments);
 986
 987                 list_for_each_entry(c, &prefix_new->assignments, head)
 988                         if ((iface = vlist_find(&interfaces, c->name, iface, node)))
 989                                 interface_set_prefix_address(c, prefix_new, iface, true);
 990         } else if (node_new) {
 991                 // Set null-route to avoid routing loops
 992                 system_add_route(NULL, &route);
 993
 994                 if (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation)
 995                         interface_update_prefix_assignments(prefix_new, true);
 996         } else if (node_old) {
 997                 // Remove null-route
 998                 interface_update_prefix_assignments(prefix_old, false);
 999                 system_del_route(NULL, &route);
1000         }
1001
1002         if (node_old) {
1003                 if (prefix_old->head.next)
1004                         list_del(&prefix_old->head);
1005                 free(prefix_old);
1006         }
1007
1008         if (node_new && (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation))
1009                 list_add(&prefix_new->head, &prefixes);
1010
1011 }
1012
1013 struct device_prefix*
1014 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
1015                 uint8_t length, time_t valid_until, time_t preferred_until,
1016                 struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
1017 {
1018         if (!pclass)
1019                 pclass = (iface) ? iface->name : "local";
1020
1021         struct device_prefix *prefix = calloc(1, sizeof(*prefix) + strlen(pclass) + 1);
1022         prefix->length = length;
1023         prefix->addr = *addr;
1024         prefix->preferred_until = preferred_until;
1025         prefix->valid_until = valid_until;
1026         prefix->iface = iface;
1027         INIT_LIST_HEAD(&prefix->assignments);
1028
1029         if (excl_addr) {
1030                 prefix->excl_addr = *excl_addr;
1031                 prefix->excl_length = excl_length;
1032         }
1033
1034         strcpy(prefix->pclass, pclass);
1035
1036         if (iface)
1037                 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
1038         else
1039                 interface_update_prefix(NULL, &prefix->node, NULL);
1040
1041         return prefix;
1042 }
1043
1044 void
1045 interface_ip_set_ula_prefix(const char *prefix)
1046 {
1047         char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
1048         if (prefix)
1049                 strncpy(buf, prefix, sizeof(buf) - 1);
1050         char *prefixaddr = strtok_r(buf, "/", &saveptr);
1051
1052         struct in6_addr addr;
1053         if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
1054                 if (ula_prefix) {
1055                         interface_update_prefix(NULL, NULL, &ula_prefix->node);
1056                         ula_prefix = NULL;
1057                 }
1058                 return;
1059         }
1060
1061         int length;
1062         char *prefixlen = strtok_r(NULL, ",", &saveptr);
1063         if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
1064                 return;
1065
1066         if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
1067                         ula_prefix->length != length) {
1068                 if (ula_prefix)
1069                         interface_update_prefix(NULL, NULL, &ula_prefix->node);
1070
1071                 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
1072                                 0, 0, NULL, 0, NULL);
1073         }
1074 }
1075
1076 void
1077 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
1078 {
1079         struct dns_server *s;
1080
1081         s = calloc(1, sizeof(*s));
1082         if (!s)
1083                 return;
1084
1085         s->af = AF_INET;
1086         if (inet_pton(s->af, str, &s->addr.in))
1087                 goto add;
1088
1089         s->af = AF_INET6;
1090         if (inet_pton(s->af, str, &s->addr.in))
1091                 goto add;
1092
1093         free(s);
1094         return;
1095
1096 add:
1097         D(INTERFACE, "Add IPv%c DNS server: %s\n",
1098           s->af == AF_INET6 ? '6' : '4', str);
1099         vlist_simple_add(&ip->dns_servers, &s->node);
1100 }
1101
1102 void
1103 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
1104 {
1105         struct blob_attr *cur;
1106         int rem;
1107
1108         blobmsg_for_each_attr(cur, list, rem) {
1109                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1110                         continue;
1111
1112                 if (!blobmsg_check_attr(cur, NULL))
1113                         continue;
1114
1115                 interface_add_dns_server(ip, blobmsg_data(cur));
1116         }
1117 }
1118
1119 static void
1120 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
1121 {
1122         struct dns_search_domain *s;
1123         int len = strlen(str);
1124
1125         s = calloc(1, sizeof(*s) + len + 1);
1126         if (!s)
1127                 return;
1128
1129         D(INTERFACE, "Add DNS search domain: %s\n", str);
1130         memcpy(s->name, str, len);
1131         vlist_simple_add(&ip->dns_search, &s->node);
1132 }
1133
1134 void
1135 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
1136 {
1137         struct blob_attr *cur;
1138         int rem;
1139
1140         blobmsg_for_each_attr(cur, list, rem) {
1141                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1142                         continue;
1143
1144                 if (!blobmsg_check_attr(cur, NULL))
1145                         continue;
1146
1147                 interface_add_dns_search_domain(ip, blobmsg_data(cur));
1148         }
1149 }
1150
1151 static void
1152 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip, const char *dev)
1153 {
1154         struct dns_server *s;
1155         struct dns_search_domain *d;
1156         const char *str;
1157         char buf[INET6_ADDRSTRLEN];
1158
1159         vlist_simple_for_each_element(&ip->dns_servers, s, node) {
1160                 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
1161                 if (!str)
1162                         continue;
1163
1164                 if (s->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&s->addr.in6))
1165                         fprintf(f, "nameserver %s%%%s\n", str, dev);
1166                 else
1167                         fprintf(f, "nameserver %s\n", str);
1168         }
1169
1170         vlist_simple_for_each_element(&ip->dns_search, d, node) {
1171                 fprintf(f, "search %s\n", d->name);
1172         }
1173 }
1174
1175 void
1176 interface_write_resolv_conf(void)
1177 {
1178         struct interface *iface;
1179         char *path = alloca(strlen(resolv_conf) + 5);
1180         FILE *f;
1181         uint32_t crcold, crcnew;
1182
1183         sprintf(path, "%s.tmp", resolv_conf);
1184         unlink(path);
1185         f = fopen(path, "w+");
1186         if (!f) {
1187                 D(INTERFACE, "Failed to open %s for writing\n", path);
1188                 return;
1189         }
1190
1191         vlist_for_each_element(&interfaces, iface, node) {
1192                 if (iface->state != IFS_UP)
1193                         continue;
1194
1195                 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
1196                     vlist_simple_empty(&iface->proto_ip.dns_servers) &&
1197                         vlist_simple_empty(&iface->config_ip.dns_search) &&
1198                     vlist_simple_empty(&iface->config_ip.dns_servers))
1199                         continue;
1200
1201                 fprintf(f, "# Interface %s\n", iface->name);
1202                 write_resolv_conf_entries(f, &iface->config_ip, iface->ifname);
1203                 if (!iface->proto_ip.no_dns)
1204                         write_resolv_conf_entries(f, &iface->proto_ip, iface->ifname);
1205         }
1206         fflush(f);
1207         rewind(f);
1208         crcnew = crc32_file(f);
1209         fclose(f);
1210
1211         crcold = crcnew + 1;
1212         f = fopen(resolv_conf, "r");
1213         if (f) {
1214                 crcold = crc32_file(f);
1215                 fclose(f);
1216         }
1217
1218         if (crcold == crcnew) {
1219                 unlink(path);
1220         } else if (rename(path, resolv_conf) < 0) {
1221                 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
1222                 unlink(path);
1223         }
1224 }
1225
1226 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
1227 {
1228         struct device_addr *addr;
1229         struct device_route *route;
1230         struct device *dev;
1231         struct interface *iface;
1232
1233         ip->enabled = enabled;
1234         iface = ip->iface;
1235         dev = iface->l3_dev.dev;
1236         if (!dev)
1237                 return;
1238
1239         vlist_for_each_element(&ip->addr, addr, node) {
1240                 bool v6 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6) ? true : false;
1241
1242                 if (addr->enabled == enabled)
1243                         continue;
1244
1245                 if (enabled) {
1246                         system_add_address(dev, addr);
1247
1248                         addr->policy_table = (v6) ? iface->ip6table : iface->ip4table;
1249                         if (iface->metric || addr->policy_table)
1250                                 interface_handle_subnet_route(iface, addr, true);
1251
1252                         if (addr->policy_table)
1253                                 set_ip_source_policy(true, v6, IPRULE_PRIORITY_ADDR, &addr->addr,
1254                                                 (v6) ? 128 : 32, addr->policy_table, NULL, NULL);
1255                 } else {
1256                         interface_handle_subnet_route(iface, addr, false);
1257                         system_del_address(dev, addr);
1258
1259                         if (addr->policy_table)
1260                                 set_ip_source_policy(false, v6, IPRULE_PRIORITY_ADDR, &addr->addr,
1261                                                 (v6) ? 128 : 32, addr->policy_table, NULL, NULL);
1262                 }
1263                 addr->enabled = enabled;
1264         }
1265
1266         vlist_for_each_element(&ip->route, route, node) {
1267                 bool _enabled = enabled;
1268
1269                 if (!enable_route(ip, route))
1270                         _enabled = false;
1271
1272                 if (route->enabled == _enabled)
1273                         continue;
1274
1275                 if (_enabled) {
1276                         interface_set_route_info(ip->iface, route);
1277
1278                         if (system_add_route(dev, route))
1279                                 route->failed = true;
1280                 } else
1281                         system_del_route(dev, route);
1282                 route->enabled = _enabled;
1283         }
1284
1285         struct device_prefix *c;
1286         struct device_prefix_assignment *a;
1287         list_for_each_entry(c, &prefixes, head)
1288                 list_for_each_entry(a, &c->assignments, head)
1289                         if (!strcmp(a->name, ip->iface->name))
1290                                 interface_set_prefix_address(a, c, ip->iface, enabled);
1291
1292         if (ip->iface && ip->iface->policy_rules_set != enabled &&
1293             ip->iface->l3_dev.dev) {
1294                 set_ip_lo_policy(enabled, true, ip->iface);
1295                 set_ip_lo_policy(enabled, false, ip->iface);
1296
1297                 set_ip_source_policy(enabled, true, IPRULE_PRIORITY_REJECT + ip->iface->l3_dev.dev->ifindex,
1298                         NULL, 0, 0, ip->iface, "failed_policy");
1299                 ip->iface->policy_rules_set = enabled;
1300         }
1301 }
1302
1303 void
1304 interface_ip_update_start(struct interface_ip_settings *ip)
1305 {
1306         if (ip != &ip->iface->config_ip) {
1307                 vlist_simple_update(&ip->dns_servers);
1308                 vlist_simple_update(&ip->dns_search);
1309         }
1310         vlist_update(&ip->route);
1311         vlist_update(&ip->addr);
1312         vlist_update(&ip->prefix);
1313 }
1314
1315 void
1316 interface_ip_update_complete(struct interface_ip_settings *ip)
1317 {
1318         vlist_simple_flush(&ip->dns_servers);
1319         vlist_simple_flush(&ip->dns_search);
1320         vlist_flush(&ip->route);
1321         vlist_flush(&ip->addr);
1322         vlist_flush(&ip->prefix);
1323         interface_write_resolv_conf();
1324 }
1325
1326 void
1327 interface_ip_flush(struct interface_ip_settings *ip)
1328 {
1329         if (ip == &ip->iface->proto_ip)
1330                 vlist_flush_all(&ip->iface->host_routes);
1331         vlist_simple_flush_all(&ip->dns_servers);
1332         vlist_simple_flush_all(&ip->dns_search);
1333         vlist_flush_all(&ip->route);
1334         vlist_flush_all(&ip->addr);
1335         vlist_flush_all(&ip->prefix);
1336 }
1337
1338 static void
1339 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1340 {
1341         ip->iface = iface;
1342         ip->enabled = true;
1343         vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1344         vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1345         vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1346         vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1347         vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1348 }
1349
1350 void
1351 interface_ip_init(struct interface *iface)
1352 {
1353         __interface_ip_init(&iface->proto_ip, iface);
1354         __interface_ip_init(&iface->config_ip, iface);
1355         vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1356 }
1357
1358 static void
1359 interface_ip_valid_until_handler(struct uloop_timeout *t)
1360 {
1361         time_t now = system_get_rtime();
1362         struct interface *iface;
1363         vlist_for_each_element(&interfaces, iface, node) {
1364                 if (iface->state != IFS_UP)
1365                         continue;
1366
1367                 struct device_addr *addr, *addrp;
1368                 struct device_route *route, *routep;
1369                 struct device_prefix *pref, *prefp;
1370
1371                 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1372                         if (addr->valid_until && addr->valid_until < now)
1373                                 vlist_delete(&iface->proto_ip.addr, &addr->node);
1374
1375                 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1376                         if (route->valid_until && route->valid_until < now)
1377                                 vlist_delete(&iface->proto_ip.route, &route->node);
1378
1379                 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1380                         if (pref->valid_until && pref->valid_until < now)
1381                                 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1382
1383         }
1384
1385         uloop_timeout_set(t, 1000);
1386 }
1387
1388 static void __init
1389 interface_ip_init_worker(void)
1390 {
1391         valid_until_timeout.cb = interface_ip_valid_until_handler;
1392         uloop_timeout_set(&valid_until_timeout, 1000);
1393 }