interface.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14 #include <string.h>
  15 #include <stdlib.h>
  16 #include <stdio.h>
  17 #include <sys/types.h>
  18 #include <sys/wait.h>
  19
  20 #include "netifd.h"
  21 #include "device.h"
  22 #include "interface.h"
  23 #include "interface-ip.h"
  24 #include "proto.h"
  25 #include "ubus.h"
  26 #include "config.h"
  27 #include "system.h"
  28
  29 struct vlist_tree interfaces;
  30 static LIST_HEAD(iface_all_users);
  31
  32 enum {
  33         IFACE_ATTR_IFNAME,
  34         IFACE_ATTR_PROTO,
  35         IFACE_ATTR_AUTO,
  36         IFACE_ATTR_JAIL,
  37         IFACE_ATTR_DEFAULTROUTE,
  38         IFACE_ATTR_PEERDNS,
  39         IFACE_ATTR_DNS,
  40         IFACE_ATTR_DNS_SEARCH,
  41         IFACE_ATTR_DNS_METRIC,
  42         IFACE_ATTR_METRIC,
  43         IFACE_ATTR_INTERFACE,
  44         IFACE_ATTR_IP6ASSIGN,
  45         IFACE_ATTR_IP6HINT,
  46         IFACE_ATTR_IP4TABLE,
  47         IFACE_ATTR_IP6TABLE,
  48         IFACE_ATTR_IP6CLASS,
  49         IFACE_ATTR_DELEGATE,
  50         IFACE_ATTR_IP6IFACEID,
  51         IFACE_ATTR_FORCE_LINK,
  52         IFACE_ATTR_IP6WEIGHT,
  53         IFACE_ATTR_MAX
  54 };
  55
  56 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
  57         [IFACE_ATTR_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
  58         [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
  59         [IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
  60         [IFACE_ATTR_JAIL] = { .name = "jail", .type = BLOBMSG_TYPE_STRING },
  61         [IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
  62         [IFACE_ATTR_PEERDNS] = { .name = "peerdns", .type = BLOBMSG_TYPE_BOOL },
  63         [IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
  64         [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
  65         [IFACE_ATTR_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
  66         [IFACE_ATTR_DNS_METRIC] = { .name = "dns_metric", .type = BLOBMSG_TYPE_INT32 },
  67         [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
  68         [IFACE_ATTR_IP6ASSIGN] = { .name = "ip6assign", .type = BLOBMSG_TYPE_INT32 },
  69         [IFACE_ATTR_IP6HINT] = { .name = "ip6hint", .type = BLOBMSG_TYPE_STRING },
  70         [IFACE_ATTR_IP4TABLE] = { .name = "ip4table", .type = BLOBMSG_TYPE_STRING },
  71         [IFACE_ATTR_IP6TABLE] = { .name = "ip6table", .type = BLOBMSG_TYPE_STRING },
  72         [IFACE_ATTR_IP6CLASS] = { .name = "ip6class", .type = BLOBMSG_TYPE_ARRAY },
  73         [IFACE_ATTR_DELEGATE] = { .name = "delegate", .type = BLOBMSG_TYPE_BOOL },
  74         [IFACE_ATTR_IP6IFACEID] = { .name = "ip6ifaceid", .type = BLOBMSG_TYPE_STRING },
  75         [IFACE_ATTR_FORCE_LINK] = { .name = "force_link", .type = BLOBMSG_TYPE_BOOL },
  76         [IFACE_ATTR_IP6WEIGHT] = { .name = "ip6weight", .type = BLOBMSG_TYPE_INT32 },
  77 };
  78
  79 const struct uci_blob_param_list interface_attr_list = {
  80         .n_params = IFACE_ATTR_MAX,
  81         .params = iface_attrs,
  82 };
  83
  84 static void
  85 interface_set_main_dev(struct interface *iface, struct device *dev);
  86 static void
  87 interface_event(struct interface *iface, enum interface_event ev);
  88
  89 static void
  90 interface_error_flush(struct interface *iface)
  91 {
  92         struct interface_error *error, *tmp;
  93
  94         list_for_each_entry_safe(error, tmp, &iface->errors, list) {
  95                 list_del(&error->list);
  96                 free(error);
  97         }
  98 }
  99
 100 static void
 101 interface_clear_errors(struct interface *iface)
 102 {
 103         /* don't flush the errors in case the configured protocol handler matches the
 104            running protocol handler and is having the last error capability */
 105         if (!(iface->proto &&
 106               (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
 107               (iface->proto->handler->name == iface->proto_handler->name)))
 108                 interface_error_flush(iface);
 109 }
 110
 111 void interface_add_error(struct interface *iface, const char *subsystem,
 112                          const char *code, const char **data, int n_data)
 113 {
 114         struct interface_error *error;
 115         int i, len = 0;
 116         int *datalen = NULL;
 117         char *dest, *d_subsys, *d_code;
 118
 119         /* if the configured protocol handler has the last error support capability,
 120            errors should only be added if the running protocol handler matches the
 121            configured one */
 122         if (iface->proto &&
 123             (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
 124             (iface->proto->handler->name != iface->proto_handler->name))
 125                 return;
 126
 127         if (n_data) {
 128                 len = n_data * sizeof(char *);
 129                 datalen = alloca(len);
 130                 for (i = 0; i < n_data; i++) {
 131                         datalen[i] = strlen(data[i]) + 1;
 132                         len += datalen[i];
 133                 }
 134         }
 135
 136         error = calloc_a(sizeof(*error) + sizeof(char *) + len,
 137                 &d_subsys, subsystem ? strlen(subsystem) + 1 : 0,
 138                 &d_code, code ? strlen(code) + 1 : 0);
 139         if (!error)
 140                 return;
 141
 142         /* Only keep the last flagged error, prevent this list grows unlimitted in case the
 143            protocol can't be established (e.g auth failure) */
 144         if (iface->proto_handler->flags & PROTO_FLAG_LASTERROR)
 145                 interface_error_flush(iface);
 146
 147         list_add_tail(&error->list, &iface->errors);
 148
 149         dest = (char *) &error->data[n_data + 1];
 150         for (i = 0; i < n_data; i++) {
 151                 error->data[i] = dest;
 152                 memcpy(dest, data[i], datalen[i]);
 153                 dest += datalen[i];
 154         }
 155         error->data[n_data] = NULL;
 156
 157         if (subsystem)
 158                 error->subsystem = strcpy(d_subsys, subsystem);
 159
 160         if (code)
 161                 error->code = strcpy(d_code, code);
 162 }
 163
 164 static void
 165 interface_data_del(struct interface *iface, struct interface_data *data)
 166 {
 167         avl_delete(&iface->data, &data->node);
 168         free(data);
 169 }
 170
 171 static void
 172 interface_data_flush(struct interface *iface)
 173 {
 174         struct interface_data *d, *tmp;
 175
 176         avl_for_each_element_safe(&iface->data, d, node, tmp)
 177                 interface_data_del(iface, d);
 178 }
 179
 180 int
 181 interface_add_data(struct interface *iface, const struct blob_attr *data)
 182 {
 183         struct interface_data *n, *o;
 184
 185         if (!blobmsg_check_attr(data, true))
 186                 return UBUS_STATUS_INVALID_ARGUMENT;
 187
 188         const char *name = blobmsg_name(data);
 189         unsigned len = blob_pad_len(data);
 190
 191         o = avl_find_element(&iface->data, name, o, node);
 192         if (o) {
 193                 if (blob_pad_len(o->data) == len && !memcmp(o->data, data, len))
 194                         return 0;
 195
 196                 interface_data_del(iface, o);
 197         }
 198
 199         n = calloc(1, sizeof(*n) + len);
 200         if (!n)
 201                 return UBUS_STATUS_UNKNOWN_ERROR;
 202
 203         memcpy(n->data, data, len);
 204         n->node.key = blobmsg_name(n->data);
 205         avl_insert(&iface->data, &n->node);
 206
 207         iface->updated |= IUF_DATA;
 208         return 0;
 209 }
 210
 211 int interface_parse_data(struct interface *iface, const struct blob_attr *attr)
 212 {
 213         struct blob_attr *cur;
 214         int rem, ret;
 215
 216         iface->updated = 0;
 217
 218         blob_for_each_attr(cur, attr, rem) {
 219                 ret = interface_add_data(iface, cur);
 220                 if (ret)
 221                         return ret;
 222         }
 223
 224         if (iface->updated && iface->state == IFS_UP)
 225                 interface_event(iface, IFEV_UPDATE);
 226
 227         return 0;
 228 }
 229
 230 static void
 231 interface_event(struct interface *iface, enum interface_event ev)
 232 {
 233         struct interface_user *dep, *tmp;
 234         struct device *adev = NULL;
 235
 236         list_for_each_entry_safe(dep, tmp, &iface->users, list)
 237                 dep->cb(dep, iface, ev);
 238
 239         list_for_each_entry_safe(dep, tmp, &iface_all_users, list)
 240                 dep->cb(dep, iface, ev);
 241
 242         switch (ev) {
 243         case IFEV_UP:
 244                 interface_error_flush(iface);
 245                 adev = iface->l3_dev.dev;
 246                 /* fall through */
 247         case IFEV_DOWN:
 248         case IFEV_UP_FAILED:
 249                 alias_notify_device(iface->name, adev);
 250                 break;
 251         default:
 252                 break;
 253         }
 254 }
 255
 256 static void
 257 interface_flush_state(struct interface *iface)
 258 {
 259         if (iface->l3_dev.dev)
 260                 device_release(&iface->l3_dev);
 261         interface_data_flush(iface);
 262 }
 263
 264 static void
 265 mark_interface_down(struct interface *iface)
 266 {
 267         enum interface_state state = iface->state;
 268
 269         if (state == IFS_DOWN)
 270                 return;
 271
 272         iface->link_up_event = false;
 273         iface->state = IFS_DOWN;
 274         switch (state) {
 275         case IFS_UP:
 276         case IFS_TEARDOWN:
 277                 interface_event(iface, IFEV_DOWN);
 278                 break;
 279         case IFS_SETUP:
 280                 interface_event(iface, IFEV_UP_FAILED);
 281                 break;
 282         default:
 283                 break;
 284         }
 285         interface_ip_set_enabled(&iface->config_ip, false);
 286         interface_ip_set_enabled(&iface->proto_ip, false);
 287         interface_ip_flush(&iface->proto_ip);
 288         interface_flush_state(iface);
 289         system_flush_routes();
 290 }
 291
 292 static inline void
 293 __set_config_state(struct interface *iface, enum interface_config_state s)
 294 {
 295         iface->config_state = s;
 296 }
 297
 298 static void
 299 __interface_set_down(struct interface *iface, bool force)
 300 {
 301         enum interface_state state = iface->state;
 302         switch (state) {
 303         case IFS_UP:
 304         case IFS_SETUP:
 305                 iface->state = IFS_TEARDOWN;
 306                 if (iface->dynamic)
 307                         __set_config_state(iface, IFC_REMOVE);
 308
 309                 if (state == IFS_UP)
 310                         interface_event(iface, IFEV_DOWN);
 311
 312                 interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
 313                 if (force)
 314                         interface_flush_state(iface);
 315                 break;
 316
 317         case IFS_DOWN:
 318                 if (iface->main_dev.dev)
 319                         device_release(&iface->main_dev);
 320         case IFS_TEARDOWN:
 321         default:
 322                 break;
 323         }
 324 }
 325
 326 static int
 327 __interface_set_up(struct interface *iface)
 328 {
 329         int ret;
 330
 331         netifd_log_message(L_NOTICE, "Interface '%s' is setting up now\n", iface->name);
 332
 333         iface->state = IFS_SETUP;
 334         ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
 335         if (ret)
 336                 mark_interface_down(iface);
 337
 338         return ret;
 339 }
 340
 341 static void
 342 interface_check_state(struct interface *iface)
 343 {
 344         bool link_state = iface->link_state || iface->force_link;
 345
 346         switch (iface->state) {
 347         case IFS_UP:
 348         case IFS_SETUP:
 349                 if (!iface->enabled || !link_state) {
 350                         iface->state = IFS_TEARDOWN;
 351                         if (iface->dynamic)
 352                                 __set_config_state(iface, IFC_REMOVE);
 353
 354                         interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
 355                 }
 356                 break;
 357         case IFS_DOWN:
 358                 if (!iface->available)
 359                         return;
 360
 361                 if (iface->autostart && iface->enabled && link_state && !config_init)
 362                         __interface_set_up(iface);
 363                 break;
 364         default:
 365                 break;
 366         }
 367 }
 368
 369 static void
 370 interface_set_enabled(struct interface *iface, bool new_state)
 371 {
 372         if (iface->enabled == new_state)
 373                 return;
 374
 375         netifd_log_message(L_NOTICE, "Interface '%s' is %s\n", iface->name, new_state ? "enabled" : "disabled");
 376         iface->enabled = new_state;
 377         interface_check_state(iface);
 378 }
 379
 380 static void
 381 interface_set_link_state(struct interface *iface, bool new_state)
 382 {
 383         if (iface->link_state == new_state)
 384                 return;
 385
 386         netifd_log_message(L_NOTICE, "Interface '%s' has link connectivity %s\n", iface->name, new_state ? "" : "loss");
 387         iface->link_state = new_state;
 388         interface_check_state(iface);
 389
 390         if (new_state && iface->force_link && iface->state == IFS_UP && !iface->link_up_event) {
 391                 interface_event(iface, IFEV_LINK_UP);
 392                 iface->link_up_event = true;
 393         }
 394 }
 395
 396 static void
 397 interface_ext_dev_cb(struct device_user *dep, enum device_event ev)
 398 {
 399         if (ev == DEV_EVENT_REMOVE)
 400                 device_remove_user(dep);
 401 }
 402
 403 static void
 404 interface_main_dev_cb(struct device_user *dep, enum device_event ev)
 405 {
 406         struct interface *iface;
 407
 408         iface = container_of(dep, struct interface, main_dev);
 409         switch (ev) {
 410         case DEV_EVENT_ADD:
 411                 interface_set_available(iface, true);
 412                 break;
 413         case DEV_EVENT_REMOVE:
 414                 interface_set_available(iface, false);
 415                 if (dep->dev && dep->dev->external)
 416                         interface_set_main_dev(iface, NULL);
 417                 break;
 418         case DEV_EVENT_UP:
 419                 interface_set_enabled(iface, true);
 420                 break;
 421         case DEV_EVENT_DOWN:
 422                 interface_set_enabled(iface, false);
 423                 break;
 424         case DEV_EVENT_LINK_UP:
 425                 interface_set_link_state(iface, true);
 426                 break;
 427         case DEV_EVENT_LINK_DOWN:
 428                 interface_set_link_state(iface, false);
 429                 break;
 430         case DEV_EVENT_TOPO_CHANGE:
 431                 interface_proto_event(iface->proto, PROTO_CMD_RENEW, false);
 432                 return;
 433         default:
 434                 break;
 435         }
 436 }
 437
 438 static void
 439 interface_l3_dev_cb(struct device_user *dep, enum device_event ev)
 440 {
 441         struct interface *iface;
 442
 443         iface = container_of(dep, struct interface, l3_dev);
 444         if (iface->l3_dev.dev == iface->main_dev.dev)
 445                 return;
 446
 447         switch (ev) {
 448         case DEV_EVENT_LINK_DOWN:
 449                 if (iface->proto_handler->flags & PROTO_FLAG_TEARDOWN_ON_L3_LINK_DOWN)
 450                         interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
 451                 break;
 452         default:
 453                 break;
 454         }
 455 }
 456
 457 void
 458 interface_set_available(struct interface *iface, bool new_state)
 459 {
 460         if (iface->available == new_state)
 461                 return;
 462
 463         D(INTERFACE, "Interface '%s', available=%d\n", iface->name, new_state);
 464         iface->available = new_state;
 465
 466         if (new_state) {
 467                 if (iface->autostart && !config_init)
 468                         interface_set_up(iface);
 469         } else
 470                 __interface_set_down(iface, true);
 471 }
 472
 473 void
 474 interface_add_user(struct interface_user *dep, struct interface *iface)
 475 {
 476         if (!iface) {
 477                 list_add(&dep->list, &iface_all_users);
 478                 return;
 479         }
 480
 481         dep->iface = iface;
 482         list_add(&dep->list, &iface->users);
 483         if (iface->state == IFS_UP)
 484                 dep->cb(dep, iface, IFEV_UP);
 485 }
 486
 487 void
 488 interface_remove_user(struct interface_user *dep)
 489 {
 490         list_del_init(&dep->list);
 491         dep->iface = NULL;
 492 }
 493
 494 static void
 495 interface_add_assignment_classes(struct interface *iface, struct blob_attr *list)
 496 {
 497         struct blob_attr *cur;
 498         int rem;
 499
 500         blobmsg_for_each_attr(cur, list, rem) {
 501                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 502                         continue;
 503
 504                 if (!blobmsg_check_attr(cur, false))
 505                         continue;
 506
 507                 struct interface_assignment_class *c = malloc(sizeof(*c) + blobmsg_data_len(cur));
 508                 memcpy(c->name, blobmsg_data(cur), blobmsg_data_len(cur));
 509                 list_add(&c->head, &iface->assignment_classes);
 510         }
 511 }
 512
 513 static void
 514 interface_clear_assignment_classes(struct interface *iface)
 515 {
 516         while (!list_empty(&iface->assignment_classes)) {
 517                 struct interface_assignment_class *c = list_first_entry(&iface->assignment_classes,
 518                                 struct interface_assignment_class, head);
 519                 list_del(&c->head);
 520                 free(c);
 521         }
 522 }
 523
 524 static void
 525 interface_merge_assignment_data(struct interface *old, struct interface *new)
 526 {
 527         bool changed = (old->assignment_hint != new->assignment_hint ||
 528                         old->assignment_length != new->assignment_length ||
 529                         old->assignment_iface_id_selection != new->assignment_iface_id_selection ||
 530                         old->assignment_weight != new->assignment_weight ||
 531                         (old->assignment_iface_id_selection == IFID_FIXED &&
 532                          memcmp(&old->assignment_fixed_iface_id, &new->assignment_fixed_iface_id,
 533                                 sizeof(old->assignment_fixed_iface_id))) ||
 534                         list_empty(&old->assignment_classes) != list_empty(&new->assignment_classes));
 535
 536         struct interface_assignment_class *c;
 537         list_for_each_entry(c, &new->assignment_classes, head) {
 538                 /* Compare list entries one-by-one to see if there was a change */
 539                 if (list_empty(&old->assignment_classes)) /* The new list is longer */
 540                         changed = true;
 541
 542                 if (changed)
 543                         break;
 544
 545                 struct interface_assignment_class *c_old = list_first_entry(&old->assignment_classes,
 546                                 struct interface_assignment_class, head);
 547
 548                 if (strcmp(c_old->name, c->name)) /* An entry didn't match */
 549                         break;
 550
 551                 list_del(&c_old->head);
 552                 free(c_old);
 553         }
 554
 555         /* The old list was longer than the new one or the last entry didn't match */
 556         if (!list_empty(&old->assignment_classes)) {
 557                 interface_clear_assignment_classes(old);
 558                 changed = true;
 559         }
 560
 561         list_splice_init(&new->assignment_classes, &old->assignment_classes);
 562
 563         if (changed) {
 564                 old->assignment_hint = new->assignment_hint;
 565                 old->assignment_length = new->assignment_length;
 566                 old->assignment_iface_id_selection = new->assignment_iface_id_selection;
 567                 old->assignment_fixed_iface_id = new->assignment_fixed_iface_id;
 568                 old->assignment_weight = new->assignment_weight;
 569                 interface_refresh_assignments(true);
 570         }
 571 }
 572
 573 static void
 574 interface_alias_cb(struct interface_user *dep, struct interface *iface, enum interface_event ev)
 575 {
 576         struct interface *alias = container_of(dep, struct interface, parent_iface);
 577         struct device *dev = iface->l3_dev.dev;
 578
 579         switch (ev) {
 580         case IFEV_UP:
 581                 if (!dev)
 582                         return;
 583
 584                 interface_set_main_dev(alias, dev);
 585                 interface_set_available(alias, true);
 586                 break;
 587         case IFEV_DOWN:
 588         case IFEV_UP_FAILED:
 589                 interface_set_available(alias, false);
 590                 interface_set_main_dev(alias, NULL);
 591                 break;
 592         case IFEV_FREE:
 593                 interface_remove_user(dep);
 594                 break;
 595         default:
 596                 break;
 597         }
 598 }
 599
 600 static void
 601 interface_set_device_config(struct interface *iface, struct device *dev)
 602 {
 603         if (!dev || !dev->default_config)
 604                 return;
 605
 606         if (!iface->device_config &&
 607             (!dev->iface_config || dev->config_iface != iface))
 608                 return;
 609
 610         dev->config_iface = iface;
 611         dev->iface_config = iface->device_config;
 612         device_apply_config(dev, dev->type, iface->config);
 613 }
 614
 615 static void
 616 interface_claim_device(struct interface *iface)
 617 {
 618         struct interface *parent;
 619         struct device *dev = NULL;
 620
 621         if (iface->parent_iface.iface)
 622                 interface_remove_user(&iface->parent_iface);
 623
 624         device_lock();
 625
 626         if (iface->parent_ifname) {
 627                 parent = vlist_find(&interfaces, iface->parent_ifname, parent, node);
 628                 iface->parent_iface.cb = interface_alias_cb;
 629                 interface_add_user(&iface->parent_iface, parent);
 630         } else if (iface->ifname &&
 631                 !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
 632                 dev = device_get(iface->ifname, true);
 633                 interface_set_device_config(iface, dev);
 634         } else {
 635                 dev = iface->ext_dev.dev;
 636         }
 637
 638         if (dev)
 639                 interface_set_main_dev(iface, dev);
 640
 641         device_unlock();
 642
 643         if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
 644                 interface_set_available(iface, true);
 645 }
 646
 647 static void
 648 interface_cleanup_state(struct interface *iface)
 649 {
 650         interface_set_available(iface, false);
 651
 652         interface_flush_state(iface);
 653         interface_clear_errors(iface);
 654         interface_set_proto_state(iface, NULL);
 655
 656         interface_set_main_dev(iface, NULL);
 657         interface_set_l3_dev(iface, NULL);
 658 }
 659
 660 static void
 661 interface_cleanup(struct interface *iface)
 662 {
 663         struct interface_user *dep, *tmp;
 664
 665         uloop_timeout_cancel(&iface->remove_timer);
 666         device_remove_user(&iface->ext_dev);
 667
 668         if (iface->parent_iface.iface)
 669                 interface_remove_user(&iface->parent_iface);
 670
 671         list_for_each_entry_safe(dep, tmp, &iface->users, list)
 672                 interface_remove_user(dep);
 673
 674         interface_clear_assignment_classes(iface);
 675         interface_ip_flush(&iface->config_ip);
 676         interface_cleanup_state(iface);
 677 }
 678
 679 static void
 680 interface_do_free(struct interface *iface)
 681 {
 682         interface_event(iface, IFEV_FREE);
 683         interface_cleanup(iface);
 684         free(iface->config);
 685         netifd_ubus_remove_interface(iface);
 686         avl_delete(&interfaces.avl, &iface->node.avl);
 687         free(iface);
 688 }
 689
 690 static void
 691 interface_do_reload(struct interface *iface)
 692 {
 693         interface_event(iface, IFEV_RELOAD);
 694         interface_cleanup_state(iface);
 695         proto_init_interface(iface, iface->config);
 696         interface_claim_device(iface);
 697 }
 698
 699 static void
 700 interface_handle_config_change(struct interface *iface)
 701 {
 702         enum interface_config_state state = iface->config_state;
 703
 704         iface->config_state = IFC_NORMAL;
 705         switch(state) {
 706         case IFC_NORMAL:
 707                 break;
 708         case IFC_RELOAD:
 709                 interface_do_reload(iface);
 710                 break;
 711         case IFC_REMOVE:
 712                 interface_do_free(iface);
 713                 return;
 714         }
 715         if (iface->autostart)
 716                 interface_set_up(iface);
 717 }
 718
 719 static void
 720 interface_proto_event_cb(struct interface_proto_state *state, enum interface_proto_event ev)
 721 {
 722         struct interface *iface = state->iface;
 723
 724         switch (ev) {
 725         case IFPEV_UP:
 726                 if (iface->state != IFS_SETUP) {
 727                         if (iface->state == IFS_UP && iface->updated)
 728                                 interface_event(iface, IFEV_UPDATE);
 729                         return;
 730                 }
 731
 732                 if (!iface->l3_dev.dev)
 733                         interface_set_l3_dev(iface, iface->main_dev.dev);
 734
 735                 interface_ip_set_enabled(&iface->config_ip, true);
 736                 interface_ip_set_enabled(&iface->proto_ip, true);
 737                 system_flush_routes();
 738                 iface->state = IFS_UP;
 739                 iface->start_time = system_get_rtime();
 740                 interface_event(iface, IFEV_UP);
 741                 netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
 742                 break;
 743         case IFPEV_DOWN:
 744                 if (iface->state == IFS_DOWN)
 745                         return;
 746
 747                 netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
 748                 mark_interface_down(iface);
 749                 if (iface->main_dev.dev)
 750                         device_release(&iface->main_dev);
 751                 if (iface->l3_dev.dev)
 752                         device_remove_user(&iface->l3_dev);
 753                 interface_handle_config_change(iface);
 754                 break;
 755         case IFPEV_LINK_LOST:
 756                 if (iface->state != IFS_UP)
 757                         return;
 758
 759                 netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
 760                 mark_interface_down(iface);
 761                 iface->state = IFS_SETUP;
 762                 break;
 763         default:
 764                 return;
 765         }
 766
 767         interface_write_resolv_conf(iface->jail);
 768 }
 769
 770 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
 771 {
 772         if (iface->proto) {
 773                 iface->proto->free(iface->proto);
 774                 iface->proto = NULL;
 775         }
 776         iface->state = IFS_DOWN;
 777         iface->proto = state;
 778         if (!state)
 779                 return;
 780
 781         state->proto_event = interface_proto_event_cb;
 782         state->iface = iface;
 783 }
 784
 785 struct interface *
 786 interface_alloc(const char *name, struct blob_attr *config, bool dynamic)
 787 {
 788         struct interface *iface;
 789         struct blob_attr *tb[IFACE_ATTR_MAX];
 790         struct blob_attr *cur;
 791         const char *proto_name = NULL;
 792         char *iface_name;
 793         bool force_link = false;
 794
 795         iface = calloc_a(sizeof(*iface), &iface_name, strlen(name) + 1);
 796         iface->name = strcpy(iface_name, name);
 797         INIT_LIST_HEAD(&iface->errors);
 798         INIT_LIST_HEAD(&iface->users);
 799         INIT_LIST_HEAD(&iface->hotplug_list);
 800         INIT_LIST_HEAD(&iface->assignment_classes);
 801         interface_ip_init(iface);
 802         avl_init(&iface->data, avl_strcmp, false, NULL);
 803         iface->config_ip.enabled = false;
 804
 805         iface->main_dev.cb = interface_main_dev_cb;
 806         iface->l3_dev.cb = interface_l3_dev_cb;
 807         iface->ext_dev.cb = interface_ext_dev_cb;
 808
 809         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
 810                       blob_data(config), blob_len(config));
 811
 812         if ((cur = tb[IFACE_ATTR_PROTO]))
 813                 proto_name = blobmsg_data(cur);
 814
 815         proto_attach_interface(iface, proto_name);
 816         if (iface->proto_handler->flags & PROTO_FLAG_FORCE_LINK_DEFAULT)
 817                 force_link = true;
 818
 819         iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
 820         iface->force_link = blobmsg_get_bool_default(tb[IFACE_ATTR_FORCE_LINK], force_link);
 821         iface->dynamic = dynamic;
 822         iface->proto_ip.no_defaultroute =
 823                 !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
 824         iface->proto_ip.no_dns =
 825                 !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
 826
 827         if ((cur = tb[IFACE_ATTR_DNS]))
 828                 interface_add_dns_server_list(&iface->config_ip, cur);
 829
 830         if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
 831                 interface_add_dns_search_list(&iface->config_ip, cur);
 832
 833         if ((cur = tb[IFACE_ATTR_DNS_METRIC]))
 834                 iface->dns_metric = blobmsg_get_u32(cur);
 835
 836         if ((cur = tb[IFACE_ATTR_METRIC]))
 837                 iface->metric = blobmsg_get_u32(cur);
 838
 839         if ((cur = tb[IFACE_ATTR_IP6ASSIGN]))
 840                 iface->assignment_length = blobmsg_get_u32(cur);
 841
 842         /* defaults */
 843         iface->assignment_iface_id_selection = IFID_FIXED;
 844         iface->assignment_fixed_iface_id = in6addr_any;
 845         iface->assignment_fixed_iface_id.s6_addr[15] = 1;
 846
 847         if ((cur = tb[IFACE_ATTR_IP6IFACEID])) {
 848                 const char *ifaceid = blobmsg_data(cur);
 849                 if (!strcmp(ifaceid, "random")) {
 850                         iface->assignment_iface_id_selection = IFID_RANDOM;
 851                 }
 852                 else if (!strcmp(ifaceid, "eui64")) {
 853                         iface->assignment_iface_id_selection = IFID_EUI64;
 854                 }
 855                 else {
 856                         /* we expect an IPv6 address with network id zero here -> fixed iface id
 857                            if we cannot parse -> revert to iface id 1 */
 858                         if (inet_pton(AF_INET6,ifaceid,&iface->assignment_fixed_iface_id) != 1 ||
 859                                         iface->assignment_fixed_iface_id.s6_addr32[0] != 0 ||
 860                                         iface->assignment_fixed_iface_id.s6_addr32[1] != 0) {
 861                                 iface->assignment_fixed_iface_id = in6addr_any;
 862                                 iface->assignment_fixed_iface_id.s6_addr[15] = 1;
 863                                 netifd_log_message(L_WARNING, "Failed to parse ip6ifaceid for interface '%s', \
 864                                                         falling back to iface id 1.\n", iface->name);
 865                         }
 866                 }
 867         }
 868
 869         iface->assignment_hint = -1;
 870         if ((cur = tb[IFACE_ATTR_IP6HINT]))
 871                 iface->assignment_hint = strtol(blobmsg_get_string(cur), NULL, 16) &
 872                                 ~((1 << (64 - iface->assignment_length)) - 1);
 873
 874         if ((cur = tb[IFACE_ATTR_IP6CLASS]))
 875                 interface_add_assignment_classes(iface, cur);
 876
 877         if ((cur = tb[IFACE_ATTR_IP6WEIGHT]))
 878                 iface->assignment_weight = blobmsg_get_u32(cur);
 879
 880         if ((cur = tb[IFACE_ATTR_IP4TABLE])) {
 881                 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip4table))
 882                         DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
 883         }
 884
 885         if ((cur = tb[IFACE_ATTR_IP6TABLE])) {
 886                 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip6table))
 887                         DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
 888         }
 889
 890         iface->proto_ip.no_delegation = !blobmsg_get_bool_default(tb[IFACE_ATTR_DELEGATE], true);
 891
 892         iface->config_autostart = iface->autostart;
 893         iface->jail = NULL;
 894
 895         if ((cur = tb[IFACE_ATTR_JAIL])) {
 896                 iface->jail = blobmsg_get_string(cur);
 897                 iface->autostart = false;
 898         }
 899
 900         return iface;
 901 }
 902
 903 static bool __interface_add(struct interface *iface, struct blob_attr *config, bool alias)
 904 {
 905         struct blob_attr *tb[IFACE_ATTR_MAX];
 906         struct blob_attr *cur;
 907         char *name = NULL;
 908
 909         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
 910                       blob_data(config), blob_len(config));
 911
 912         if (alias) {
 913                 if ((cur = tb[IFACE_ATTR_INTERFACE]))
 914                         iface->parent_ifname = blobmsg_data(cur);
 915
 916                 if (!iface->parent_ifname)
 917                         return false;
 918         } else {
 919                 if ((cur = tb[IFACE_ATTR_IFNAME]))
 920                         iface->ifname = blobmsg_data(cur);
 921         }
 922
 923         if (iface->dynamic) {
 924                 name = strdup(iface->name);
 925
 926                 if (!name)
 927                         return false;
 928         }
 929
 930         iface->config = config;
 931         vlist_add(&interfaces, &iface->node, iface->name);
 932
 933         if (name) {
 934                 iface = vlist_find(&interfaces, name, iface, node);
 935                 free(name);
 936
 937                 /* Don't delete dynamic interface on reload */
 938                 if (iface)
 939                         iface->node.version = -1;
 940         }
 941
 942         return true;
 943 }
 944
 945 bool
 946 interface_add(struct interface *iface, struct blob_attr *config)
 947 {
 948         return __interface_add(iface, config, false);
 949 }
 950
 951 bool
 952 interface_add_alias(struct interface *iface, struct blob_attr *config)
 953 {
 954         if (iface->proto_handler->flags & PROTO_FLAG_NODEV)
 955                 return false;
 956
 957         return __interface_add(iface, config, true);
 958 }
 959
 960 void
 961 interface_set_l3_dev(struct interface *iface, struct device *dev)
 962 {
 963         bool enabled = iface->config_ip.enabled;
 964         bool claimed = iface->l3_dev.claimed;
 965
 966         if (iface->l3_dev.dev == dev)
 967                 return;
 968
 969         interface_ip_set_enabled(&iface->config_ip, false);
 970         interface_ip_set_enabled(&iface->proto_ip, false);
 971         interface_ip_flush(&iface->proto_ip);
 972         device_add_user(&iface->l3_dev, dev);
 973
 974         if (dev) {
 975                 if (claimed) {
 976                         if (device_claim(&iface->l3_dev) < 0)
 977                                 return;
 978                 }
 979                 interface_ip_set_enabled(&iface->config_ip, enabled);
 980                 interface_ip_set_enabled(&iface->proto_ip, enabled);
 981         }
 982 }
 983
 984 static void
 985 interface_set_main_dev(struct interface *iface, struct device *dev)
 986 {
 987         bool claimed = iface->l3_dev.claimed;
 988
 989         if (iface->main_dev.dev == dev)
 990                 return;
 991
 992         interface_set_available(iface, false);
 993         device_add_user(&iface->main_dev, dev);
 994         if (!dev) {
 995                 interface_set_link_state(iface, false);
 996                 return;
 997         }
 998
 999         if (claimed) {
1000                 if (device_claim(&iface->l3_dev) < 0)
1001                         return;
1002         }
1003
1004         if (!iface->l3_dev.dev)
1005                 interface_set_l3_dev(iface, dev);
1006 }
1007
1008 static int
1009 interface_remove_link(struct interface *iface, struct device *dev)
1010 {
1011         struct device *mdev = iface->main_dev.dev;
1012
1013         if (mdev && mdev->hotplug_ops)
1014                 return mdev->hotplug_ops->del(mdev, dev);
1015
1016         if (dev == iface->ext_dev.dev)
1017                 device_remove_user(&iface->ext_dev);
1018
1019         if (!iface->main_dev.hotplug)
1020                 return UBUS_STATUS_INVALID_ARGUMENT;
1021
1022         if (dev != iface->main_dev.dev)
1023                 return UBUS_STATUS_INVALID_ARGUMENT;
1024
1025         interface_set_main_dev(iface, NULL);
1026         return 0;
1027 }
1028
1029 static int
1030 interface_add_link(struct interface *iface, struct device *dev, bool link_ext)
1031 {
1032         struct device *mdev = iface->main_dev.dev;
1033
1034         if (mdev == dev)
1035                 return 0;
1036
1037         if (iface->main_dev.hotplug)
1038                 device_remove_user(&iface->main_dev);
1039
1040         if (mdev) {
1041                 if (mdev->hotplug_ops)
1042                         return mdev->hotplug_ops->add(mdev, dev);
1043                 else
1044                         return UBUS_STATUS_NOT_SUPPORTED;
1045         }
1046
1047         if (link_ext)
1048                 device_add_user(&iface->ext_dev, dev);
1049
1050         interface_set_main_dev(iface, dev);
1051         iface->main_dev.hotplug = true;
1052         return 0;
1053 }
1054
1055 int
1056 interface_handle_link(struct interface *iface, const char *name, bool add, bool link_ext)
1057 {
1058         struct device *dev;
1059         int ret;
1060
1061         device_lock();
1062
1063         dev = device_get(name, add ? (link_ext ? 2 : 1) : 0);
1064         if (!dev) {
1065                 ret = UBUS_STATUS_NOT_FOUND;
1066                 goto out;
1067         }
1068
1069         if (add) {
1070                 interface_set_device_config(iface, dev);
1071                 device_set_present(dev, true);
1072
1073                 ret = interface_add_link(iface, dev, link_ext);
1074         } else {
1075                 ret = interface_remove_link(iface, dev);
1076         }
1077
1078 out:
1079         device_unlock();
1080
1081         return ret;
1082 }
1083
1084 void
1085 interface_set_up(struct interface *iface)
1086 {
1087         int ret;
1088         const char *error = NULL;
1089
1090         iface->autostart = true;
1091
1092         if (iface->state != IFS_DOWN)
1093                 return;
1094
1095         interface_clear_errors(iface);
1096         if (iface->available) {
1097                 if (iface->main_dev.dev) {
1098                         ret = device_claim(&iface->main_dev);
1099                         if (!ret)
1100                                 interface_check_state(iface);
1101                         else
1102                                 error = "DEVICE_CLAIM_FAILED";
1103                 } else {
1104                         ret = __interface_set_up(iface);
1105                         if (ret)
1106                                 error = "SETUP_FAILED";
1107                 }
1108         } else
1109                 error = "NO_DEVICE";
1110
1111         if (error)
1112                 interface_add_error(iface, "interface", error, NULL, 0);
1113 }
1114
1115 void
1116 interface_set_down(struct interface *iface)
1117 {
1118         if (!iface) {
1119                 vlist_for_each_element(&interfaces, iface, node)
1120                         __interface_set_down(iface, false);
1121         } else {
1122                 iface->autostart = false;
1123                 __interface_set_down(iface, false);
1124         }
1125 }
1126
1127 int
1128 interface_renew(struct interface *iface)
1129 {
1130         if (iface->state == IFS_TEARDOWN || iface->state == IFS_DOWN)
1131                 return -1;
1132
1133         return interface_proto_event(iface->proto, PROTO_CMD_RENEW, false);
1134 }
1135
1136 void
1137 interface_start_pending(void)
1138 {
1139         struct interface *iface;
1140
1141         vlist_for_each_element(&interfaces, iface, node) {
1142                 if (iface->autostart)
1143                         interface_set_up(iface);
1144         }
1145 }
1146
1147 void
1148 interface_start_jail(const char *jail, const pid_t netns_pid)
1149 {
1150         struct interface *iface;
1151         int netns_fd;
1152         int wstatus;
1153         pid_t pr = 0;
1154
1155         netns_fd = system_netns_open(netns_pid);
1156         if (netns_fd < 0)
1157                 return;
1158
1159         vlist_for_each_element(&interfaces, iface, node) {
1160                 if (!iface->jail || strcmp(iface->jail, jail))
1161                         continue;
1162
1163                 system_link_netns_move(iface->ifname, netns_fd);
1164         }
1165
1166         pr = fork();
1167         if (pr) {
1168                 waitpid(pr, &wstatus, WUNTRACED | WCONTINUED);
1169                 close(netns_fd);
1170                 return;
1171         }
1172
1173         system_netns_set(netns_fd);
1174         system_init();
1175         vlist_for_each_element(&interfaces, iface, node) {
1176                 if (!iface->jail || strcmp(iface->jail, jail))
1177                         continue;
1178
1179                 interface_set_up(iface);
1180         }
1181         _exit(0);
1182 }
1183
1184 void
1185 interface_stop_jail(const char *jail, const pid_t netns_pid)
1186 {
1187         struct interface *iface;
1188         int netns_fd, root_netns;
1189         int wstatus;
1190         pid_t pr = 0;
1191
1192         netns_fd = system_netns_open(netns_pid);
1193         if (netns_fd < 0)
1194                 return;
1195
1196         root_netns = system_netns_open(getpid());
1197         if (root_netns < 0)
1198                 return;
1199
1200         pr = fork();
1201         if (pr) {
1202                 waitpid(pr, &wstatus, WUNTRACED | WCONTINUED);
1203                 close(netns_fd);
1204                 close(root_netns);
1205                 return;
1206         }
1207
1208         system_netns_set(netns_fd);
1209         system_init();
1210         vlist_for_each_element(&interfaces, iface, node) {
1211                 if (!iface->jail || strcmp(iface->jail, jail))
1212                         continue;
1213
1214                 interface_set_down(iface);
1215                 system_link_netns_move(iface->ifname, root_netns);
1216         }
1217         _exit(0);
1218 }
1219
1220 static void
1221 set_config_state(struct interface *iface, enum interface_config_state s)
1222 {
1223         __set_config_state(iface, s);
1224         if (iface->state == IFS_DOWN)
1225                 interface_handle_config_change(iface);
1226         else
1227                 __interface_set_down(iface, false);
1228 }
1229
1230 void
1231 interface_update_start(struct interface *iface, const bool keep_old)
1232 {
1233         iface->updated = 0;
1234
1235         if (!keep_old)
1236                 interface_ip_update_start(&iface->proto_ip);
1237 }
1238
1239 void
1240 interface_update_complete(struct interface *iface)
1241 {
1242         interface_ip_update_complete(&iface->proto_ip);
1243 }
1244
1245 static void
1246 interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
1247 {
1248         vlist_simple_replace(&new->dns_servers, &old->dns_servers);
1249         vlist_simple_replace(&new->dns_search, &old->dns_search);
1250 }
1251
1252 static bool
1253 interface_device_config_changed(struct interface *if_old, struct interface *if_new)
1254 {
1255         struct blob_attr *ntb[__DEV_ATTR_MAX];
1256         struct blob_attr *otb[__DEV_ATTR_MAX];
1257         struct device *dev = if_old->main_dev.dev;
1258         unsigned long diff = 0;
1259
1260         BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
1261
1262         if (!dev)
1263                 return false;
1264
1265         if (if_old->device_config != if_new->device_config)
1266                 return true;
1267
1268         if (!if_new->device_config)
1269                 return false;
1270
1271         blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb,
1272                 blob_data(if_old->config), blob_len(if_old->config));
1273
1274         blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, ntb,
1275                 blob_data(if_new->config), blob_len(if_new->config));
1276
1277         uci_blob_diff(ntb, otb, &device_attr_list, &diff);
1278         return diff;
1279 }
1280
1281 static void
1282 interface_change_config(struct interface *if_old, struct interface *if_new)
1283 {
1284         struct blob_attr *old_config = if_old->config;
1285         bool reload = false, reload_ip = false, update_prefix_delegation = false;
1286
1287 #define FIELD_CHANGED_STR(field)                                        \
1288                 ((!!if_old->field != !!if_new->field) ||                \
1289                  (if_old->field &&                                      \
1290                   strcmp(if_old->field, if_new->field) != 0))
1291
1292         if (FIELD_CHANGED_STR(parent_ifname)) {
1293                 if (if_old->parent_iface.iface)
1294                         interface_remove_user(&if_old->parent_iface);
1295                 reload = true;
1296         }
1297
1298         if (!reload && interface_device_config_changed(if_old, if_new))
1299                 reload = true;
1300
1301         if (FIELD_CHANGED_STR(ifname) ||
1302             if_old->proto_handler != if_new->proto_handler)
1303                 reload = true;
1304
1305         if (!if_old->proto_handler->config_params)
1306                 D(INTERFACE, "No config parameters for interface '%s'\n",
1307                   if_old->name);
1308         else if (!uci_blob_check_equal(if_old->config, if_new->config,
1309                                        if_old->proto_handler->config_params))
1310                 reload = true;
1311
1312 #define UPDATE(field, __var) ({                                         \
1313                 bool __changed = (if_old->field != if_new->field);      \
1314                 if_old->field = if_new->field;                          \
1315                 __var |= __changed;                                     \
1316         })
1317
1318         if_old->config = if_new->config;
1319         if (if_old->config_autostart != if_new->config_autostart) {
1320                 if (if_old->config_autostart)
1321                         reload = true;
1322
1323                 if_old->autostart = if_new->config_autostart;
1324         }
1325
1326         if_old->device_config = if_new->device_config;
1327         if_old->config_autostart = if_new->config_autostart;
1328         if_old->jail = if_new->jail;
1329         if (if_old->jail)
1330                 if_old->autostart = false;
1331
1332         if_old->ifname = if_new->ifname;
1333         if_old->parent_ifname = if_new->parent_ifname;
1334         if_old->dynamic = if_new->dynamic;
1335         if_old->proto_handler = if_new->proto_handler;
1336         if_old->force_link = if_new->force_link;
1337         if_old->dns_metric = if_new->dns_metric;
1338
1339         if (if_old->proto_ip.no_delegation != if_new->proto_ip.no_delegation) {
1340                 if_old->proto_ip.no_delegation = if_new->proto_ip.no_delegation;
1341                 update_prefix_delegation = true;
1342         }
1343
1344         if_old->proto_ip.no_dns = if_new->proto_ip.no_dns;
1345         interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
1346
1347         UPDATE(metric, reload_ip);
1348         UPDATE(proto_ip.no_defaultroute, reload_ip);
1349         UPDATE(ip4table, reload_ip);
1350         UPDATE(ip6table, reload_ip);
1351         interface_merge_assignment_data(if_old, if_new);
1352
1353 #undef UPDATE
1354
1355         if (reload) {
1356                 D(INTERFACE, "Reload interface '%s' because of config changes\n",
1357                   if_old->name);
1358                 interface_clear_errors(if_old);
1359                 set_config_state(if_old, IFC_RELOAD);
1360                 goto out;
1361         }
1362
1363         if (reload_ip) {
1364                 bool config_ip_enabled = if_old->config_ip.enabled;
1365                 bool proto_ip_enabled = if_old->proto_ip.enabled;
1366
1367                 interface_ip_set_enabled(&if_old->config_ip, false);
1368                 interface_ip_set_enabled(&if_old->proto_ip, false);
1369                 interface_ip_set_enabled(&if_old->proto_ip, proto_ip_enabled);
1370                 interface_ip_set_enabled(&if_old->config_ip, config_ip_enabled);
1371         }
1372
1373         if (update_prefix_delegation)
1374                 interface_update_prefix_delegation(&if_old->proto_ip);
1375
1376         interface_write_resolv_conf(if_old->jail);
1377         if (if_old->main_dev.dev)
1378                 interface_check_state(if_old);
1379
1380 out:
1381         if_new->config = NULL;
1382         interface_cleanup(if_new);
1383         free(old_config);
1384         free(if_new);
1385 }
1386
1387 static void
1388 interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
1389                  struct vlist_node *node_old)
1390 {
1391         struct interface *if_old = container_of(node_old, struct interface, node);
1392         struct interface *if_new = container_of(node_new, struct interface, node);
1393
1394         if (node_old && node_new) {
1395                 D(INTERFACE, "Update interface '%s'\n", if_new->name);
1396                 interface_change_config(if_old, if_new);
1397         } else if (node_old) {
1398                 D(INTERFACE, "Remove interface '%s'\n", if_old->name);
1399                 set_config_state(if_old, IFC_REMOVE);
1400         } else if (node_new) {
1401                 D(INTERFACE, "Create interface '%s'\n", if_new->name);
1402                 interface_event(if_new, IFEV_CREATE);
1403                 proto_init_interface(if_new, if_new->config);
1404                 interface_claim_device(if_new);
1405                 netifd_ubus_add_interface(if_new);
1406         }
1407 }
1408
1409
1410 static void __init
1411 interface_init_list(void)
1412 {
1413         vlist_init(&interfaces, avl_strcmp, interface_update);
1414         interfaces.keep_old = true;
1415         interfaces.no_delete = true;
1416 }