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, bool src)
 103 {
 104         struct iprule rule = {
 105                 .flags = IPRULE_PRIORITY,
 106                 .priority = priority
 107         };
 108
 109         if (addr) {
 110                 if (src) {
 111                         rule.flags |= IPRULE_SRC;
 112                         rule.src_addr = *addr;
 113                         rule.src_mask = mask;
 114                 } else {
 115                         rule.flags |= IPRULE_DEST;
 116                         rule.dest_addr = *addr;
 117                         rule.dest_mask = mask;
 118                 }
 119         }
 120
 121         if (table) {
 122                 rule.flags |= IPRULE_LOOKUP;
 123                 rule.lookup = table;
 124
 125                 if (!rule.lookup)
 126                         return 0;
 127         } else if (action) {
 128                 rule.flags |= IPRULE_ACTION;
 129                 system_resolve_iprule_action(action, &rule.action);
 130         }
 131
 132         if (in_iface && in_iface->l3_dev.dev) {
 133                 rule.flags |= IPRULE_IN;
 134                 strcpy(rule.in_dev, in_iface->l3_dev.dev->ifname);
 135         }
 136
 137         rule.flags |= (v6) ? IPRULE_INET6 : IPRULE_INET4;
 138
 139         return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
 140 }
 141
 142 static int set_ip_lo_policy(bool add, bool v6, struct interface *iface)
 143 {
 144         struct iprule rule = {
 145                 .flags = IPRULE_IN | IPRULE_LOOKUP | IPRULE_PRIORITY,
 146                 .priority = IPRULE_PRIORITY_NW + iface->l3_dev.dev->ifindex,
 147                 .lookup = (v6) ? iface->ip6table : iface->ip4table,
 148                 .in_dev = "lo"
 149         };
 150
 151         if (!rule.lookup)
 152                 return 0;
 153
 154         rule.flags |= (v6) ? IPRULE_INET6 : IPRULE_INET4;
 155
 156         return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
 157 }
 158
 159 static bool
 160 __find_ip_addr_target(struct interface_ip_settings *ip, union if_addr *a, bool v6)
 161 {
 162         struct device_addr *addr;
 163
 164         vlist_for_each_element(&ip->addr, addr, node) {
 165                 if (!addr->enabled)
 166                         continue;
 167
 168                 if (v6 != ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
 169                         continue;
 170
 171                 // Handle offlink addresses correctly
 172                 unsigned int mask = addr->mask;
 173                 if ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6 &&
 174                                 (addr->flags & DEVADDR_OFFLINK))
 175                         mask = 128;
 176
 177                 if (!match_if_addr(&addr->addr, a, mask))
 178                         continue;
 179
 180                 return true;
 181         }
 182
 183         return false;
 184 }
 185
 186 static void
 187 __find_ip_route_target(struct interface_ip_settings *ip, union if_addr *a,
 188                        bool v6, struct device_route **res)
 189 {
 190         struct device_route *route;
 191
 192         vlist_for_each_element(&ip->route, route, node) {
 193                 if (!route->enabled)
 194                         continue;
 195
 196                 if (v6 != ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
 197                         continue;
 198
 199                 if (!match_if_addr(&route->addr, a, route->mask))
 200                         continue;
 201
 202                 if (route->flags & DEVROUTE_TABLE)
 203                         continue;
 204
 205                 if (!*res || route->mask < (*res)->mask)
 206                         *res = route;
 207         }
 208 }
 209
 210 static bool
 211 interface_ip_find_addr_target(struct interface *iface, union if_addr *a, bool v6)
 212 {
 213         return __find_ip_addr_target(&iface->proto_ip, a, v6) ||
 214                __find_ip_addr_target(&iface->config_ip, a, v6);
 215 }
 216
 217 static void
 218 interface_ip_find_route_target(struct interface *iface, union if_addr *a,
 219                                bool v6, struct device_route **route)
 220 {
 221         __find_ip_route_target(&iface->proto_ip, a, v6, route);
 222         __find_ip_route_target(&iface->config_ip, a, v6, route);
 223 }
 224
 225 struct interface *
 226 interface_ip_add_target_route(union if_addr *addr, bool v6, struct interface *iface)
 227 {
 228         struct device_route *route, *r_next = NULL;
 229         bool defaultroute_target = false;
 230         int addrsize = v6 ? sizeof(addr->in6) : sizeof(addr->in);
 231
 232         route = calloc(1, sizeof(*route));
 233         if (!route)
 234                 return NULL;
 235
 236         route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
 237         route->mask = v6 ? 128 : 32;
 238         if (memcmp(&route->addr, addr, addrsize) == 0)
 239                 defaultroute_target = true;
 240         else
 241                 memcpy(&route->addr, addr, addrsize);
 242
 243         if (iface) {
 244                 /* look for locally addressable target first */
 245                 if (interface_ip_find_addr_target(iface, addr, v6))
 246                         goto done;
 247
 248                 /* do not stop at the first route, let the lookup compare
 249                  * masks to find the best match */
 250                 interface_ip_find_route_target(iface, addr, v6, &r_next);
 251         } else {
 252                 vlist_for_each_element(&interfaces, iface, node) {
 253                         /* look for locally addressable target first */
 254                         if (interface_ip_find_addr_target(iface, addr, v6))
 255                                 goto done;
 256
 257                         /* do not stop at the first route, let the lookup compare
 258                          * masks to find the best match */
 259                         interface_ip_find_route_target(iface, addr, v6, &r_next);
 260                 }
 261         }
 262
 263         if (!r_next) {
 264                 free(route);
 265                 return NULL;
 266         }
 267
 268         iface = r_next->iface;
 269         memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
 270         route->mtu = r_next->mtu;
 271         route->metric = r_next->metric;
 272         route->table = r_next->table;
 273
 274 done:
 275         route->iface = iface;
 276         if (defaultroute_target)
 277                 free(route);
 278         else
 279                 vlist_add(&iface->host_routes, &route->node, route);
 280         return iface;
 281 }
 282
 283 static void
 284 interface_set_route_info(struct interface *iface, struct device_route *route)
 285 {
 286         bool v6 = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6);
 287
 288         if (!iface)
 289                 return;
 290
 291         if (!(route->flags & DEVROUTE_METRIC))
 292                 route->metric = iface->metric;
 293
 294         if (!(route->flags & DEVROUTE_TABLE)) {
 295                 route->table = (v6) ? iface->ip6table : iface->ip4table;
 296                 if (route->table)
 297                         route->flags |= DEVROUTE_SRCTABLE;
 298         }
 299 }
 300
 301 void
 302 interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
 303 {
 304         struct interface_ip_settings *ip;
 305         struct blob_attr *tb[__ROUTE_MAX], *cur;
 306         struct device_route *route;
 307         int af = v6 ? AF_INET6 : AF_INET;
 308
 309         blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
 310
 311         if (!iface) {
 312                 if ((cur = tb[ROUTE_INTERFACE]) == NULL)
 313                         return;
 314
 315                 iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
 316                 if (!iface)
 317                         return;
 318
 319                 ip = &iface->config_ip;
 320         } else {
 321                 ip = &iface->proto_ip;
 322         }
 323
 324         route = calloc(1, sizeof(*route));
 325         if (!route)
 326                 return;
 327
 328         route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
 329         route->mask = v6 ? 128 : 32;
 330         if ((cur = tb[ROUTE_MASK]) != NULL) {
 331                 route->mask = parse_netmask_string(blobmsg_data(cur), v6);
 332                 if (route->mask > (v6 ? 128 : 32))
 333                         goto error;
 334         }
 335
 336         if ((cur = tb[ROUTE_TARGET]) != NULL) {
 337                 if (!parse_ip_and_netmask(af, blobmsg_data(cur), &route->addr, &route->mask)) {
 338                         DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
 339                         goto error;
 340                 }
 341         }
 342
 343         if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
 344                 if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
 345                         DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
 346                         goto error;
 347                 }
 348         }
 349
 350         if ((cur = tb[ROUTE_METRIC]) != NULL) {
 351                 route->metric = blobmsg_get_u32(cur);
 352                 route->flags |= DEVROUTE_METRIC;
 353         }
 354
 355         if ((cur = tb[ROUTE_MTU]) != NULL) {
 356                 route->mtu = blobmsg_get_u32(cur);
 357                 route->flags |= DEVROUTE_MTU;
 358         }
 359
 360         // Use source-based routing
 361         if ((cur = tb[ROUTE_SOURCE]) != NULL) {
 362                 char *saveptr, *source = alloca(blobmsg_data_len(cur));
 363                 memcpy(source, blobmsg_data(cur), blobmsg_data_len(cur));
 364
 365                 const char *addr = strtok_r(source, "/", &saveptr);
 366                 const char *mask = strtok_r(NULL, "/", &saveptr);
 367
 368                 if (!addr || inet_pton(af, addr, &route->source) < 1) {
 369                         DPRINTF("Failed to parse route source: %s\n", addr ? addr : "NULL");
 370                         goto error;
 371                 }
 372
 373                 route->sourcemask = (mask) ? atoi(mask) : ((af == AF_INET6) ? 128 : 32);
 374         }
 375
 376         if ((cur = tb[ROUTE_ONLINK]) != NULL && blobmsg_get_bool(cur))
 377                 route->flags |= DEVROUTE_ONLINK;
 378
 379         if ((cur = tb[ROUTE_TABLE]) != NULL) {
 380                 if (!system_resolve_rt_table(blobmsg_data(cur), &route->table)) {
 381                         DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
 382                         goto error;
 383                 }
 384
 385                 /* only set the table flag if not using the main (default) table */
 386                 if (system_is_default_rt_table(route->table))
 387                         route->table = 0;
 388
 389                 if (route->table)
 390                         route->flags |= DEVROUTE_TABLE;
 391         }
 392
 393         if ((cur = tb[ROUTE_VALID]) != NULL) {
 394                 int64_t valid = blobmsg_get_u32(cur);
 395                 int64_t valid_until = valid + (int64_t)system_get_rtime();
 396                 if (valid_until <= LONG_MAX && valid != 0xffffffffLL) // Catch overflow
 397                         route->valid_until = valid_until;
 398         }
 399
 400         if ((cur = tb[ROUTE_TYPE]) != NULL) {
 401                 if (!system_resolve_rt_type(blobmsg_data(cur), &route->type)) {
 402                         DPRINTF("Failed to resolve routing type: %s\n", (char *) blobmsg_data(cur));
 403                         goto error;
 404                 }
 405                 route->flags |= DEVROUTE_TYPE;
 406         }
 407
 408         interface_set_route_info(iface, route);
 409         vlist_add(&ip->route, &route->node, route);
 410         return;
 411
 412 error:
 413         free(route);
 414 }
 415
 416 static int
 417 addr_cmp(const void *k1, const void *k2, void *ptr)
 418 {
 419         return memcmp(k1, k2, sizeof(struct device_addr) -
 420                       offsetof(struct device_addr, flags));
 421 }
 422
 423 static int
 424 route_cmp(const void *k1, const void *k2, void *ptr)
 425 {
 426         const struct device_route *r1 = k1, *r2 = k2;
 427
 428         if (r1->mask != r2->mask)
 429                 return r2->mask - r1->mask;
 430
 431         if (r1->metric != r2->metric)
 432                 return r1->metric - r2->metric;
 433
 434         if (r1->flags != r2->flags)
 435                 return r2->flags - r1->flags;
 436
 437         if (r1->sourcemask != r2->sourcemask)
 438                 return r1->sourcemask - r2->sourcemask;
 439
 440         if (r1->table != r2->table)
 441                 return r1->table - r2->table;
 442
 443         int maskcmp = memcmp(&r1->source, &r2->source, sizeof(r1->source));
 444         if (maskcmp)
 445                 return maskcmp;
 446
 447         return memcmp(&r1->addr, &r2->addr, sizeof(r1->addr));
 448 }
 449
 450 static int
 451 prefix_cmp(const void *k1, const void *k2, void *ptr)
 452 {
 453         return memcmp(k1, k2, offsetof(struct device_prefix, pclass) -
 454                         offsetof(struct device_prefix, addr));
 455 }
 456
 457 static void
 458 interface_handle_subnet_route(struct interface *iface, struct device_addr *addr, bool add)
 459 {
 460         struct device *dev = iface->l3_dev.dev;
 461         struct device_route *r = &addr->subnet;
 462
 463         if (addr->flags & DEVADDR_OFFLINK)
 464                 return;
 465
 466         if (!add) {
 467                 if (!addr->subnet.iface)
 468                         return;
 469
 470                 system_del_route(dev, r);
 471                 memset(r, 0, sizeof(*r));
 472                 return;
 473         }
 474
 475         r->iface = iface;
 476         r->flags = addr->flags;
 477         r->mask = addr->mask;
 478         memcpy(&r->addr, &addr->addr, sizeof(r->addr));
 479         clear_if_addr(&r->addr, r->mask);
 480
 481         r->flags |= DEVADDR_KERNEL;
 482         system_del_route(dev, r);
 483
 484         r->flags &= ~DEVADDR_KERNEL;
 485         interface_set_route_info(iface, r);
 486
 487         system_add_route(dev, r);
 488 }
 489
 490 static void
 491 interface_add_addr_rules(struct device_addr *addr, bool enabled)
 492 {
 493         bool v6 = (addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6;
 494
 495         set_ip_source_policy(enabled, v6, IPRULE_PRIORITY_ADDR, &addr->addr,
 496                              (v6) ? 128 : 32, addr->policy_table, NULL, NULL,
 497                              true);
 498         set_ip_source_policy(enabled, v6, IPRULE_PRIORITY_ADDR_MASK,
 499                              &addr->addr, addr->mask, addr->policy_table, NULL,
 500                              NULL, false);
 501 }
 502
 503 static void
 504 interface_update_proto_addr(struct vlist_tree *tree,
 505                             struct vlist_node *node_new,
 506                             struct vlist_node *node_old)
 507 {
 508         struct interface_ip_settings *ip;
 509         struct interface *iface;
 510         struct device *dev;
 511         struct device_addr *a_new = NULL, *a_old = NULL;
 512         bool replace = false;
 513         bool keep = false;
 514         bool v6 = false;
 515
 516         ip = container_of(tree, struct interface_ip_settings, addr);
 517         iface = ip->iface;
 518         dev = iface->l3_dev.dev;
 519
 520         if (!node_new || !node_old)
 521                 iface->updated |= IUF_ADDRESS;
 522
 523         if (node_new) {
 524                 a_new = container_of(node_new, struct device_addr, node);
 525
 526                 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
 527                     !a_new->broadcast) {
 528
 529                         /* /31 and /32 addressing need 255.255.255.255
 530                          * as broadcast address. */
 531                         if (a_new->mask >= 31) {
 532                                 a_new->broadcast = (uint32_t) ~0;
 533                         } else {
 534                                 uint32_t mask = ~0;
 535                                 uint32_t *a = (uint32_t *) &a_new->addr;
 536
 537                                 mask >>= a_new->mask;
 538                                 a_new->broadcast = *a | htonl(mask);
 539                         }
 540                 }
 541         }
 542
 543         if (node_old)
 544                 a_old = container_of(node_old, struct device_addr, node);
 545
 546         if (a_new && a_old) {
 547                 keep = true;
 548
 549                 if (a_old->flags != a_new->flags || a_old->failed)
 550                         keep = false;
 551
 552                 if (a_old->valid_until != a_new->valid_until ||
 553                                 a_old->preferred_until != a_new->preferred_until)
 554                         replace = true;
 555
 556                 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
 557                     a_new->broadcast != a_old->broadcast)
 558                         keep = false;
 559         }
 560
 561         if (node_old) {
 562                 if (a_old->enabled && !keep) {
 563                         //This is needed for source routing to work correctly. If a device
 564                         //has two connections to a network using the same subnet, adding
 565                         //only the network-rule will cause packets to be routed through the
 566                         //first matching network (source IP matches both masks).
 567                         if (a_old->policy_table)
 568                                 interface_add_addr_rules(a_old, false);
 569
 570                         if (!(a_old->flags & DEVADDR_EXTERNAL)) {
 571                                 interface_handle_subnet_route(iface, a_old, false);
 572                                 system_del_address(dev, a_old);
 573                         }
 574                 }
 575                 free(a_old->pclass);
 576                 free(a_old);
 577         }
 578
 579         if (node_new) {
 580                 a_new->enabled = true;
 581
 582                 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
 583                                 v6 = true;
 584
 585                 a_new->policy_table = (v6) ? iface->ip6table : iface->ip4table;
 586
 587                 if (!keep || replace) {
 588                         if (!(a_new->flags & DEVADDR_EXTERNAL)) {
 589                                 if (system_add_address(dev, a_new))
 590                                         a_new->failed = true;
 591
 592                                 if (iface->metric || a_new->policy_table)
 593                                         interface_handle_subnet_route(iface, a_new, true);
 594                         }
 595
 596                         if (!keep) {
 597                                 if (a_new->policy_table)
 598                                         interface_add_addr_rules(a_new, true);
 599                         }
 600                 }
 601         }
 602 }
 603
 604 static bool
 605 enable_route(struct interface_ip_settings *ip, struct device_route *route)
 606 {
 607         if (ip->no_defaultroute && !route->mask)
 608                 return false;
 609
 610         return ip->enabled;
 611 }
 612
 613 static void
 614 interface_update_proto_route(struct vlist_tree *tree,
 615                              struct vlist_node *node_new,
 616                              struct vlist_node *node_old)
 617 {
 618         struct interface_ip_settings *ip;
 619         struct interface *iface;
 620         struct device *dev;
 621         struct device_route *route_old, *route_new;
 622         bool keep = false;
 623
 624         ip = container_of(tree, struct interface_ip_settings, route);
 625         iface = ip->iface;
 626         dev = iface->l3_dev.dev;
 627
 628         if (!node_new || !node_old)
 629                 iface->updated |= IUF_ROUTE;
 630
 631         route_old = container_of(node_old, struct device_route, node);
 632         route_new = container_of(node_new, struct device_route, node);
 633
 634         if (node_old && node_new)
 635                 keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop)) &&
 636                         (route_old->mtu == route_new->mtu) && (route_old->type == route_new->type) &&
 637                         !route_old->failed;
 638
 639         if (node_old) {
 640                 if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
 641                         system_del_route(dev, route_old);
 642
 643                 free(route_old);
 644         }
 645
 646         if (node_new) {
 647                 bool _enabled = enable_route(ip, route_new);
 648
 649                 if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
 650                         if (system_add_route(dev, route_new))
 651                                 route_new->failed = true;
 652
 653                 route_new->iface = iface;
 654                 route_new->enabled = _enabled;
 655         }
 656 }
 657
 658 static void
 659 interface_update_host_route(struct vlist_tree *tree,
 660                              struct vlist_node *node_new,
 661                              struct vlist_node *node_old)
 662 {
 663         struct interface *iface;
 664         struct device *dev;
 665         struct device_route *route_old, *route_new;
 666
 667         iface = container_of(tree, struct interface, host_routes);
 668         dev = iface->l3_dev.dev;
 669
 670         route_old = container_of(node_old, struct device_route, node);
 671         route_new = container_of(node_new, struct device_route, node);
 672
 673         if (node_old) {
 674                 system_del_route(dev, route_old);
 675                 free(route_old);
 676         }
 677
 678         if (node_new) {
 679                 if (system_add_route(dev, route_new))
 680                         route_new->failed = true;
 681         }
 682 }
 683
 684 static void
 685 random_ifaceid(struct in6_addr *addr)
 686 {
 687         static bool initialized = false;
 688         struct timeval t;
 689
 690         if (!initialized) {
 691                 long int seed = 0;
 692                 gettimeofday(&t, NULL);
 693                 seed = t.tv_sec ^ t.tv_usec ^ getpid();
 694                 srand48(seed);
 695                 initialized = true;
 696         }
 697         addr->s6_addr32[2] = (uint32_t)mrand48();
 698         addr->s6_addr32[3] = (uint32_t)mrand48();
 699 }
 700
 701 static void
 702 eui64_ifaceid(struct interface *iface, struct in6_addr *addr)
 703 {
 704         /* get mac address */
 705         uint8_t *macaddr = iface->l3_dev.dev->settings.macaddr;
 706         uint8_t *ifaceid = addr->s6_addr + 8;
 707         memcpy(ifaceid,macaddr,3);
 708         memcpy(ifaceid + 5,macaddr + 3, 3);
 709         ifaceid[3] = 0xff;
 710         ifaceid[4] = 0xfe;
 711         ifaceid[0] ^= 0x02;
 712 }
 713
 714 static void
 715 generate_ifaceid(struct interface *iface, struct in6_addr *addr)
 716 {
 717         /* generate new iface id */
 718         switch (iface->assignment_iface_id_selection) {
 719         case IFID_FIXED:
 720                 /* fixed */
 721                 /* copy host part from assignment_fixed_iface_id */
 722                 memcpy(addr->s6_addr + 8, iface->assignment_fixed_iface_id.s6_addr + 8, 8);
 723                 break;
 724         case IFID_RANDOM:
 725                 /* randomize last 64 bits */
 726                 random_ifaceid(addr);
 727                 break;
 728         case IFID_EUI64:
 729                 /* eui64 */
 730                 eui64_ifaceid(iface, addr);
 731                 break;
 732         }
 733 }
 734
 735 static void
 736 interface_set_prefix_address(struct device_prefix_assignment *assignment,
 737                 const struct device_prefix *prefix, struct interface *iface, bool add)
 738 {
 739         const struct interface *uplink = prefix->iface;
 740         if (!iface->l3_dev.dev)
 741                 return;
 742
 743         struct device *l3_downlink = iface->l3_dev.dev;
 744
 745         struct device_addr addr;
 746         struct device_route route;
 747         memset(&addr, 0, sizeof(addr));
 748         memset(&route, 0, sizeof(route));
 749
 750         if (IN6_IS_ADDR_UNSPECIFIED(&assignment->addr)) {
 751                 addr.addr.in6 = prefix->addr;
 752                 addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
 753                 generate_ifaceid(iface, &addr.addr.in6);
 754                 assignment->addr = addr.addr.in6;
 755         }
 756         else
 757                 addr.addr.in6 = assignment->addr;
 758
 759         addr.mask = assignment->length;
 760         addr.flags = DEVADDR_INET6 | DEVADDR_OFFLINK;
 761         addr.preferred_until = prefix->preferred_until;
 762         addr.valid_until = prefix->valid_until;
 763
 764         route.flags = DEVADDR_INET6;
 765         route.mask = addr.mask < 64 ? 64 : addr.mask;
 766         route.addr = addr.addr;
 767         clear_if_addr(&route.addr, route.mask);
 768         interface_set_route_info(iface, &route);
 769
 770         if (!add && assignment->enabled) {
 771                 time_t now = system_get_rtime();
 772                 addr.preferred_until = now;
 773                 if (!addr.valid_until || addr.valid_until - now > 7200)
 774                         addr.valid_until = now + 7200;
 775
 776                 if (prefix->iface) {
 777                         if (prefix->iface->ip6table)
 778                                 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW, &addr.addr,
 779                                                 addr.mask, prefix->iface->ip6table, iface, NULL, true);
 780
 781                         set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT, &addr.addr,
 782                                                         addr.mask, 0, iface, "unreachable", true);
 783                 }
 784
 785                 system_del_route(l3_downlink, &route);
 786                 system_add_address(l3_downlink, &addr);
 787
 788                 assignment->enabled = false;
 789         } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP) &&
 790                         !system_add_address(l3_downlink, &addr)) {
 791
 792                 if (prefix->iface && !assignment->enabled) {
 793                         set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT, &addr.addr,
 794                                         addr.mask, 0, iface, "unreachable", true);
 795
 796                         if (prefix->iface->ip6table)
 797                                 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW, &addr.addr,
 798                                                 addr.mask, prefix->iface->ip6table, iface, NULL, true);
 799                 }
 800
 801                 route.metric = iface->metric;
 802                 system_add_route(l3_downlink, &route);
 803
 804                 if (uplink && uplink->l3_dev.dev && !(l3_downlink->settings.flags & DEV_OPT_MTU6)) {
 805                         int mtu = system_update_ipv6_mtu(uplink->l3_dev.dev, 0);
 806                         int mtu_old = system_update_ipv6_mtu(l3_downlink, 0);
 807
 808                         if (mtu > 0 && mtu_old > mtu)
 809                                 system_update_ipv6_mtu(l3_downlink, mtu);
 810                 }
 811
 812                 assignment->enabled = true;
 813         }
 814 }
 815
 816 static bool interface_prefix_assign(struct list_head *list,
 817                 struct device_prefix_assignment *assign)
 818 {
 819         int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
 820         struct device_prefix_assignment *c;
 821         list_for_each_entry(c, list, head) {
 822                 if (assign->assigned != -1) {
 823                         if (assign->assigned >= current && assign->assigned + asize < c->assigned) {
 824                                 list_add_tail(&assign->head, &c->head);
 825                                 return true;
 826                         }
 827                 } else if (assign->assigned == -1) {
 828                         current = (current + asize) & (~asize);
 829                         if (current + asize < c->assigned) {
 830                                 assign->assigned = current;
 831                                 list_add_tail(&assign->head, &c->head);
 832                                 return true;
 833                         }
 834                 }
 835                 current = (c->assigned + (1 << (64 - c->length)));
 836         }
 837         return false;
 838 }
 839
 840 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
 841 {
 842         struct device_prefix_assignment *c;
 843         struct interface *iface;
 844
 845         // Delete all assignments
 846         while (!list_empty(&prefix->assignments)) {
 847                 c = list_first_entry(&prefix->assignments,
 848                                 struct device_prefix_assignment, head);
 849                 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
 850                         interface_set_prefix_address(c, prefix, iface, false);
 851                 list_del(&c->head);
 852                 free(c);
 853         }
 854
 855         if (!setup)
 856                 return;
 857
 858         // End-of-assignment sentinel
 859         c = malloc(sizeof(*c) + 1);
 860         if (!c)
 861                 return;
 862
 863         c->assigned = 1 << (64 - prefix->length);
 864         c->length = 64;
 865         c->name[0] = 0;
 866         c->addr = in6addr_any;
 867         list_add(&c->head, &prefix->assignments);
 868
 869         // Excluded prefix
 870         if (prefix->excl_length > 0) {
 871                 const char name[] = "!excluded";
 872                 c = malloc(sizeof(*c) + sizeof(name));
 873                 if (c) {
 874                         c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
 875                                         ((1 << (64 - prefix->length)) - 1);
 876                         c->length = prefix->excl_length;
 877                         c->addr = in6addr_any;
 878                         memcpy(c->name, name, sizeof(name));
 879                         list_add(&c->head, &prefix->assignments);
 880                 }
 881         }
 882
 883         bool assigned_any = false;
 884         struct list_head assign_later = LIST_HEAD_INIT(assign_later);
 885         vlist_for_each_element(&interfaces, iface, node) {
 886                 if (iface->assignment_length < 48 ||
 887                                 iface->assignment_length > 64)
 888                         continue;
 889
 890                 // Test whether there is a matching class
 891                 if (!list_empty(&iface->assignment_classes)) {
 892                         bool found = false;
 893
 894                         struct interface_assignment_class *c;
 895                         list_for_each_entry(c, &iface->assignment_classes, head) {
 896                                 if (!strcmp(c->name, prefix->pclass)) {
 897                                         found = true;
 898                                         break;
 899                                 }
 900                         }
 901
 902                         if (!found)
 903                                 continue;
 904                 }
 905
 906                 size_t namelen = strlen(iface->name) + 1;
 907                 c = malloc(sizeof(*c) + namelen);
 908                 if (!c)
 909                         continue;
 910
 911                 c->length = iface->assignment_length;
 912                 c->assigned = iface->assignment_hint;
 913                 c->addr = in6addr_any;
 914                 c->enabled = false;
 915                 memcpy(c->name, iface->name, namelen);
 916
 917                 // First process all custom assignments, put all others in later-list
 918                 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
 919                         if (c->assigned != -1) {
 920                                 c->assigned = -1;
 921                                 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
 922                                                 "of size %hhu for %s, trying other\n", c->length, c->name);
 923                         }
 924
 925                         struct list_head *next = &assign_later;
 926                         struct device_prefix_assignment *n;
 927                         list_for_each_entry(n, &assign_later, head) {
 928                                 if (n->length < c->length) {
 929                                         next = &n->head;
 930                                         break;
 931                                 }
 932                         }
 933                         list_add_tail(&c->head, next);
 934                 }
 935
 936                 if (c->assigned != -1)
 937                         assigned_any = true;
 938         }
 939
 940         // Then try to assign all other + failed custom assignments
 941         while (!list_empty(&assign_later)) {
 942                 c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
 943                 list_del(&c->head);
 944
 945                 bool assigned = false;
 946                 do {
 947                         assigned = interface_prefix_assign(&prefix->assignments, c);
 948                 } while (!assigned && ++c->length <= 64);
 949
 950                 if (!assigned) {
 951                         netifd_log_message(L_WARNING, "Failed to assign subprefix "
 952                                         "of size %hhu for %s\n", c->length, c->name);
 953                         free(c);
 954                 } else {
 955                         assigned_any = true;
 956                 }
 957         }
 958
 959         list_for_each_entry(c, &prefix->assignments, head)
 960                 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
 961                         interface_set_prefix_address(c, prefix, iface, true);
 962
 963         if (!assigned_any)
 964                 netifd_log_message(L_WARNING, "You have delegated IPv6-prefixes but haven't assigned them "
 965                                 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
 966 }
 967
 968
 969 void interface_refresh_assignments(bool hint)
 970 {
 971         static bool refresh = false;
 972         if (!hint && refresh) {
 973                 struct device_prefix *p;
 974                 list_for_each_entry(p, &prefixes, head)
 975                         interface_update_prefix_assignments(p, true);
 976         }
 977         refresh = hint;
 978 }
 979
 980
 981 static void
 982 interface_update_prefix(struct vlist_tree *tree,
 983                              struct vlist_node *node_new,
 984                              struct vlist_node *node_old)
 985 {
 986         struct device_prefix *prefix_old, *prefix_new;
 987         prefix_old = container_of(node_old, struct device_prefix, node);
 988         prefix_new = container_of(node_new, struct device_prefix, node);
 989
 990         struct interface_ip_settings *ip = container_of(tree, struct interface_ip_settings, prefix);
 991         if (tree && (!node_new || !node_old))
 992                 ip->iface->updated |= IUF_PREFIX;
 993
 994         struct device_route route;
 995         memset(&route, 0, sizeof(route));
 996         route.flags = DEVADDR_INET6;
 997         route.metric = INT32_MAX;
 998         route.mask = (node_new) ? prefix_new->length : prefix_old->length;
 999         route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
1000
1001
1002         struct device_prefix_assignment *c;
1003         struct interface *iface;
1004
1005         if (node_old && node_new) {
1006                 // Move assignments and refresh addresses to update valid times
1007                 list_splice(&prefix_old->assignments, &prefix_new->assignments);
1008
1009                 list_for_each_entry(c, &prefix_new->assignments, head)
1010                         if ((iface = vlist_find(&interfaces, c->name, iface, node)))
1011                                 interface_set_prefix_address(c, prefix_new, iface, true);
1012         } else if (node_new) {
1013                 // Set null-route to avoid routing loops
1014                 system_add_route(NULL, &route);
1015
1016                 if (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation)
1017                         interface_update_prefix_assignments(prefix_new, true);
1018         } else if (node_old) {
1019                 // Remove null-route
1020                 interface_update_prefix_assignments(prefix_old, false);
1021                 system_del_route(NULL, &route);
1022         }
1023
1024         if (node_old) {
1025                 if (prefix_old->head.next)
1026                         list_del(&prefix_old->head);
1027                 free(prefix_old);
1028         }
1029
1030         if (node_new && (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation))
1031                 list_add(&prefix_new->head, &prefixes);
1032
1033 }
1034
1035 struct device_prefix*
1036 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
1037                 uint8_t length, time_t valid_until, time_t preferred_until,
1038                 struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
1039 {
1040         if (!pclass)
1041                 pclass = (iface) ? iface->name : "local";
1042
1043         struct device_prefix *prefix = calloc(1, sizeof(*prefix) + strlen(pclass) + 1);
1044         if (!prefix)
1045                 return NULL;
1046
1047         prefix->length = length;
1048         prefix->addr = *addr;
1049         prefix->preferred_until = preferred_until;
1050         prefix->valid_until = valid_until;
1051         prefix->iface = iface;
1052         INIT_LIST_HEAD(&prefix->assignments);
1053
1054         if (excl_addr) {
1055                 prefix->excl_addr = *excl_addr;
1056                 prefix->excl_length = excl_length;
1057         }
1058
1059         strcpy(prefix->pclass, pclass);
1060
1061         if (iface)
1062                 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
1063         else
1064                 interface_update_prefix(NULL, &prefix->node, NULL);
1065
1066         return prefix;
1067 }
1068
1069 void
1070 interface_ip_set_ula_prefix(const char *prefix)
1071 {
1072         char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
1073         if (prefix)
1074                 strncpy(buf, prefix, sizeof(buf) - 1);
1075         char *prefixaddr = strtok_r(buf, "/", &saveptr);
1076
1077         struct in6_addr addr;
1078         if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
1079                 if (ula_prefix) {
1080                         interface_update_prefix(NULL, NULL, &ula_prefix->node);
1081                         ula_prefix = NULL;
1082                 }
1083                 return;
1084         }
1085
1086         int length;
1087         char *prefixlen = strtok_r(NULL, ",", &saveptr);
1088         if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
1089                 return;
1090
1091         if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
1092                         ula_prefix->length != length) {
1093                 if (ula_prefix)
1094                         interface_update_prefix(NULL, NULL, &ula_prefix->node);
1095
1096                 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
1097                                 0, 0, NULL, 0, NULL);
1098         }
1099 }
1100
1101 void
1102 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
1103 {
1104         struct dns_server *s;
1105
1106         s = calloc(1, sizeof(*s));
1107         if (!s)
1108                 return;
1109
1110         s->af = AF_INET;
1111         if (inet_pton(s->af, str, &s->addr.in))
1112                 goto add;
1113
1114         s->af = AF_INET6;
1115         if (inet_pton(s->af, str, &s->addr.in))
1116                 goto add;
1117
1118         free(s);
1119         return;
1120
1121 add:
1122         D(INTERFACE, "Add IPv%c DNS server: %s\n",
1123           s->af == AF_INET6 ? '6' : '4', str);
1124         vlist_simple_add(&ip->dns_servers, &s->node);
1125 }
1126
1127 void
1128 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
1129 {
1130         struct blob_attr *cur;
1131         int rem;
1132
1133         blobmsg_for_each_attr(cur, list, rem) {
1134                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1135                         continue;
1136
1137                 if (!blobmsg_check_attr(cur, NULL))
1138                         continue;
1139
1140                 interface_add_dns_server(ip, blobmsg_data(cur));
1141         }
1142 }
1143
1144 static void
1145 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
1146 {
1147         struct dns_search_domain *s;
1148         int len = strlen(str);
1149
1150         s = calloc(1, sizeof(*s) + len + 1);
1151         if (!s)
1152                 return;
1153
1154         D(INTERFACE, "Add DNS search domain: %s\n", str);
1155         memcpy(s->name, str, len);
1156         vlist_simple_add(&ip->dns_search, &s->node);
1157 }
1158
1159 void
1160 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
1161 {
1162         struct blob_attr *cur;
1163         int rem;
1164
1165         blobmsg_for_each_attr(cur, list, rem) {
1166                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1167                         continue;
1168
1169                 if (!blobmsg_check_attr(cur, NULL))
1170                         continue;
1171
1172                 interface_add_dns_search_domain(ip, blobmsg_data(cur));
1173         }
1174 }
1175
1176 static void
1177 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip, const char *dev)
1178 {
1179         struct dns_server *s;
1180         struct dns_search_domain *d;
1181         const char *str;
1182         char buf[INET6_ADDRSTRLEN];
1183
1184         vlist_simple_for_each_element(&ip->dns_servers, s, node) {
1185                 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
1186                 if (!str)
1187                         continue;
1188
1189                 if (s->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&s->addr.in6))
1190                         fprintf(f, "nameserver %s%%%s\n", str, dev);
1191                 else
1192                         fprintf(f, "nameserver %s\n", str);
1193         }
1194
1195         vlist_simple_for_each_element(&ip->dns_search, d, node) {
1196                 fprintf(f, "search %s\n", d->name);
1197         }
1198 }
1199
1200 /* Sorting of interface resolver entries :               */
1201 /* Primary on interface dns_metric : lowest metric first */
1202 /* Secondary on interface metric : lowest metric first   */
1203 /* Finally alphabetical order of interface names         */
1204 static int resolv_conf_iface_cmp(const void *k1, const void *k2, void *ptr)
1205 {
1206         const struct interface *iface1 = k1, *iface2 = k2;
1207
1208         if (iface1->dns_metric != iface2->dns_metric)
1209                 return iface1->dns_metric - iface2->dns_metric;
1210
1211         if (iface1->metric != iface2->metric)
1212                 return iface1->metric - iface2->metric;
1213
1214         return strcmp(iface1->name, iface2->name);
1215 }
1216
1217 static void
1218 __interface_write_dns_entries(FILE *f)
1219 {
1220         struct interface *iface;
1221         struct {
1222                 struct avl_node node;
1223         } *entry, *n_entry;
1224         struct avl_tree resolv_conf_iface_entries;
1225
1226         avl_init(&resolv_conf_iface_entries, resolv_conf_iface_cmp, false, NULL);
1227
1228         vlist_for_each_element(&interfaces, iface, node) {
1229                 if (iface->state != IFS_UP)
1230                         continue;
1231
1232                 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
1233                     vlist_simple_empty(&iface->proto_ip.dns_servers) &&
1234                     vlist_simple_empty(&iface->config_ip.dns_search) &&
1235                     vlist_simple_empty(&iface->config_ip.dns_servers))
1236                         continue;
1237
1238                 entry = calloc(1, sizeof(*entry));
1239                 if (!entry)
1240                         continue;
1241
1242                 entry->node.key = iface;
1243                 avl_insert(&resolv_conf_iface_entries, &entry->node);
1244         }
1245
1246         avl_for_each_element(&resolv_conf_iface_entries, entry, node) {
1247                 iface = (struct interface *)entry->node.key;
1248
1249                 fprintf(f, "# Interface %s\n", iface->name);
1250
1251                 write_resolv_conf_entries(f, &iface->config_ip, iface->ifname);
1252
1253                 if (!iface->proto_ip.no_dns)
1254                         write_resolv_conf_entries(f, &iface->proto_ip, iface->ifname);
1255         }
1256
1257         avl_remove_all_elements(&resolv_conf_iface_entries, entry, node, n_entry)
1258                 free(entry);
1259 }
1260
1261 void
1262 interface_write_resolv_conf(void)
1263 {
1264         char *path = alloca(strlen(resolv_conf) + 5);
1265         FILE *f;
1266         uint32_t crcold, crcnew;
1267
1268         sprintf(path, "%s.tmp", resolv_conf);
1269         unlink(path);
1270         f = fopen(path, "w+");
1271         if (!f) {
1272                 D(INTERFACE, "Failed to open %s for writing\n", path);
1273                 return;
1274         }
1275
1276         __interface_write_dns_entries(f);
1277
1278         fflush(f);
1279         rewind(f);
1280         crcnew = crc32_file(f);
1281         fclose(f);
1282
1283         crcold = crcnew + 1;
1284         f = fopen(resolv_conf, "r");
1285         if (f) {
1286                 crcold = crc32_file(f);
1287                 fclose(f);
1288         }
1289
1290         if (crcold == crcnew) {
1291                 unlink(path);
1292         } else if (rename(path, resolv_conf) < 0) {
1293                 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
1294                 unlink(path);
1295         }
1296 }
1297
1298 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
1299 {
1300         struct device_addr *addr;
1301         struct device_route *route;
1302         struct device *dev;
1303         struct interface *iface;
1304
1305         ip->enabled = enabled;
1306         iface = ip->iface;
1307         dev = iface->l3_dev.dev;
1308         if (!dev)
1309                 return;
1310
1311         vlist_for_each_element(&ip->addr, addr, node) {
1312                 bool v6 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6) ? true : false;
1313
1314                 if (addr->flags & DEVADDR_EXTERNAL)
1315                         continue;
1316
1317                 if (addr->enabled == enabled)
1318                         continue;
1319
1320                 if (enabled) {
1321                         system_add_address(dev, addr);
1322
1323                         addr->policy_table = (v6) ? iface->ip6table : iface->ip4table;
1324                         if (iface->metric || addr->policy_table)
1325                                 interface_handle_subnet_route(iface, addr, true);
1326
1327                         if (addr->policy_table)
1328                                 interface_add_addr_rules(addr, true);
1329                 } else {
1330                         interface_handle_subnet_route(iface, addr, false);
1331                         system_del_address(dev, addr);
1332
1333                         if (addr->policy_table)
1334                                 interface_add_addr_rules(addr, false);
1335                 }
1336                 addr->enabled = enabled;
1337         }
1338
1339         vlist_for_each_element(&ip->route, route, node) {
1340                 bool _enabled = enabled;
1341
1342                 if (route->flags & DEVADDR_EXTERNAL)
1343                         continue;
1344
1345                 if (!enable_route(ip, route))
1346                         _enabled = false;
1347
1348                 if (route->enabled == _enabled)
1349                         continue;
1350
1351                 if (_enabled) {
1352                         interface_set_route_info(ip->iface, route);
1353
1354                         if (system_add_route(dev, route))
1355                                 route->failed = true;
1356                 } else
1357                         system_del_route(dev, route);
1358                 route->enabled = _enabled;
1359         }
1360
1361         struct device_prefix *c;
1362         struct device_prefix_assignment *a;
1363         list_for_each_entry(c, &prefixes, head)
1364                 list_for_each_entry(a, &c->assignments, head)
1365                         if (!strcmp(a->name, ip->iface->name))
1366                                 interface_set_prefix_address(a, c, ip->iface, enabled);
1367
1368         if (ip->iface && ip->iface->policy_rules_set != enabled &&
1369             ip->iface->l3_dev.dev) {
1370                 set_ip_lo_policy(enabled, true, ip->iface);
1371                 set_ip_lo_policy(enabled, false, ip->iface);
1372
1373                 set_ip_source_policy(enabled, true, IPRULE_PRIORITY_REJECT + ip->iface->l3_dev.dev->ifindex,
1374                         NULL, 0, 0, ip->iface, "failed_policy", true);
1375                 ip->iface->policy_rules_set = enabled;
1376         }
1377 }
1378
1379 void
1380 interface_ip_update_start(struct interface_ip_settings *ip)
1381 {
1382         if (ip != &ip->iface->config_ip) {
1383                 vlist_simple_update(&ip->dns_servers);
1384                 vlist_simple_update(&ip->dns_search);
1385         }
1386         vlist_update(&ip->route);
1387         vlist_update(&ip->addr);
1388         vlist_update(&ip->prefix);
1389 }
1390
1391 void
1392 interface_ip_update_complete(struct interface_ip_settings *ip)
1393 {
1394         vlist_simple_flush(&ip->dns_servers);
1395         vlist_simple_flush(&ip->dns_search);
1396         vlist_flush(&ip->route);
1397         vlist_flush(&ip->addr);
1398         vlist_flush(&ip->prefix);
1399         interface_write_resolv_conf();
1400 }
1401
1402 void
1403 interface_ip_flush(struct interface_ip_settings *ip)
1404 {
1405         if (ip == &ip->iface->proto_ip)
1406                 vlist_flush_all(&ip->iface->host_routes);
1407         vlist_simple_flush_all(&ip->dns_servers);
1408         vlist_simple_flush_all(&ip->dns_search);
1409         vlist_flush_all(&ip->route);
1410         vlist_flush_all(&ip->addr);
1411         vlist_flush_all(&ip->prefix);
1412 }
1413
1414 static void
1415 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1416 {
1417         ip->iface = iface;
1418         ip->enabled = true;
1419         vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1420         vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1421         vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1422         vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1423         vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1424 }
1425
1426 void
1427 interface_ip_init(struct interface *iface)
1428 {
1429         __interface_ip_init(&iface->proto_ip, iface);
1430         __interface_ip_init(&iface->config_ip, iface);
1431         vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1432 }
1433
1434 static void
1435 interface_ip_valid_until_handler(struct uloop_timeout *t)
1436 {
1437         time_t now = system_get_rtime();
1438         struct interface *iface;
1439         vlist_for_each_element(&interfaces, iface, node) {
1440                 if (iface->state != IFS_UP)
1441                         continue;
1442
1443                 struct device_addr *addr, *addrp;
1444                 struct device_route *route, *routep;
1445                 struct device_prefix *pref, *prefp;
1446
1447                 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1448                         if (addr->valid_until && addr->valid_until < now)
1449                                 vlist_delete(&iface->proto_ip.addr, &addr->node);
1450
1451                 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1452                         if (route->valid_until && route->valid_until < now)
1453                                 vlist_delete(&iface->proto_ip.route, &route->node);
1454
1455                 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1456                         if (pref->valid_until && pref->valid_until < now)
1457                                 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1458
1459         }
1460
1461         uloop_timeout_set(t, 1000);
1462 }
1463
1464 static void __init
1465 interface_ip_init_worker(void)
1466 {
1467         valid_until_timeout.cb = interface_ip_valid_until_handler;
1468         uloop_timeout_set(&valid_until_timeout, 1000);
1469 }