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