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 #include "wireless.h"
  29
  30 struct vlist_tree interfaces;
  31 static LIST_HEAD(iface_all_users);
  32
  33 enum {
  34         IFACE_ATTR_DEVICE,
  35         IFACE_ATTR_IFNAME, /* Backward compatibility */
  36         IFACE_ATTR_PROTO,
  37         IFACE_ATTR_AUTO,
  38         IFACE_ATTR_ZONE,
  39         IFACE_ATTR_JAIL,
  40         IFACE_ATTR_JAIL_DEVICE,
  41         IFACE_ATTR_JAIL_IFNAME,
  42         IFACE_ATTR_HOST_DEVICE,
  43         IFACE_ATTR_DEFAULTROUTE,
  44         IFACE_ATTR_PEERDNS,
  45         IFACE_ATTR_DNS,
  46         IFACE_ATTR_DNS_SEARCH,
  47         IFACE_ATTR_DNS_METRIC,
  48         IFACE_ATTR_METRIC,
  49         IFACE_ATTR_INTERFACE,
  50         IFACE_ATTR_IP6ASSIGN,
  51         IFACE_ATTR_IP6HINT,
  52         IFACE_ATTR_IP4TABLE,
  53         IFACE_ATTR_IP6TABLE,
  54         IFACE_ATTR_IP6CLASS,
  55         IFACE_ATTR_DELEGATE,
  56         IFACE_ATTR_IP6IFACEID,
  57         IFACE_ATTR_FORCE_LINK,
  58         IFACE_ATTR_IP6WEIGHT,
  59         IFACE_ATTR_MAX
  60 };
  61
  62 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
  63         [IFACE_ATTR_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
  64         [IFACE_ATTR_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
  65         [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
  66         [IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
  67         [IFACE_ATTR_ZONE] = { .name = "zone", .type = BLOBMSG_TYPE_STRING },
  68         [IFACE_ATTR_JAIL] = { .name = "jail", .type = BLOBMSG_TYPE_STRING },
  69         [IFACE_ATTR_JAIL_DEVICE] = { .name = "jail_device", .type = BLOBMSG_TYPE_STRING },
  70         [IFACE_ATTR_JAIL_IFNAME] = { .name = "jail_ifname", .type = BLOBMSG_TYPE_STRING },
  71         [IFACE_ATTR_HOST_DEVICE] = { .name = "host_device", .type = BLOBMSG_TYPE_STRING },
  72         [IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
  73         [IFACE_ATTR_PEERDNS] = { .name = "peerdns", .type = BLOBMSG_TYPE_BOOL },
  74         [IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
  75         [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
  76         [IFACE_ATTR_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
  77         [IFACE_ATTR_DNS_METRIC] = { .name = "dns_metric", .type = BLOBMSG_TYPE_INT32 },
  78         [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
  79         [IFACE_ATTR_IP6ASSIGN] = { .name = "ip6assign", .type = BLOBMSG_TYPE_INT32 },
  80         [IFACE_ATTR_IP6HINT] = { .name = "ip6hint", .type = BLOBMSG_TYPE_STRING },
  81         [IFACE_ATTR_IP4TABLE] = { .name = "ip4table", .type = BLOBMSG_TYPE_STRING },
  82         [IFACE_ATTR_IP6TABLE] = { .name = "ip6table", .type = BLOBMSG_TYPE_STRING },
  83         [IFACE_ATTR_IP6CLASS] = { .name = "ip6class", .type = BLOBMSG_TYPE_ARRAY },
  84         [IFACE_ATTR_DELEGATE] = { .name = "delegate", .type = BLOBMSG_TYPE_BOOL },
  85         [IFACE_ATTR_IP6IFACEID] = { .name = "ip6ifaceid", .type = BLOBMSG_TYPE_STRING },
  86         [IFACE_ATTR_FORCE_LINK] = { .name = "force_link", .type = BLOBMSG_TYPE_BOOL },
  87         [IFACE_ATTR_IP6WEIGHT] = { .name = "ip6weight", .type = BLOBMSG_TYPE_INT32 },
  88 };
  89
  90 const struct uci_blob_param_list interface_attr_list = {
  91         .n_params = IFACE_ATTR_MAX,
  92         .params = iface_attrs,
  93 };
  94
  95 static void
  96 interface_set_main_dev(struct interface *iface, struct device *dev);
  97 static void
  98 interface_event(struct interface *iface, enum interface_event ev);
  99
 100 static void
 101 interface_error_flush(struct interface *iface)
 102 {
 103         struct interface_error *error, *tmp;
 104
 105         list_for_each_entry_safe(error, tmp, &iface->errors, list) {
 106                 list_del(&error->list);
 107                 free(error);
 108         }
 109 }
 110
 111 static bool
 112 interface_force_link(struct interface *iface)
 113 {
 114         struct device *dev = iface->main_dev.dev;
 115
 116         if (dev && dev->settings.auth)
 117                 return false;
 118
 119         return iface->force_link;
 120 }
 121
 122 static void
 123 interface_clear_errors(struct interface *iface)
 124 {
 125         /* don't flush the errors in case the configured protocol handler matches the
 126            running protocol handler and is having the last error capability */
 127         if (!(iface->proto &&
 128               (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
 129               (iface->proto->handler->name == iface->proto_handler->name)))
 130                 interface_error_flush(iface);
 131 }
 132
 133 void interface_add_error(struct interface *iface, const char *subsystem,
 134                          const char *code, const char **data, int n_data)
 135 {
 136         struct interface_error *error;
 137         int i, len = 0;
 138         int *datalen = NULL;
 139         char *dest, *d_subsys, *d_code;
 140
 141         /* if the configured protocol handler has the last error support capability,
 142            errors should only be added if the running protocol handler matches the
 143            configured one */
 144         if (iface->proto &&
 145             (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
 146             (iface->proto->handler->name != iface->proto_handler->name))
 147                 return;
 148
 149         if (n_data) {
 150                 len = n_data * sizeof(char *);
 151                 datalen = alloca(len);
 152                 for (i = 0; i < n_data; i++) {
 153                         datalen[i] = strlen(data[i]) + 1;
 154                         len += datalen[i];
 155                 }
 156         }
 157
 158         error = calloc_a(sizeof(*error) + sizeof(char *) + len,
 159                 &d_subsys, subsystem ? strlen(subsystem) + 1 : 0,
 160                 &d_code, code ? strlen(code) + 1 : 0);
 161         if (!error)
 162                 return;
 163
 164         /* Only keep the last flagged error, prevent this list grows unlimitted in case the
 165            protocol can't be established (e.g auth failure) */
 166         if (iface->proto_handler->flags & PROTO_FLAG_LASTERROR)
 167                 interface_error_flush(iface);
 168
 169         list_add_tail(&error->list, &iface->errors);
 170
 171         dest = (char *) &error->data[n_data + 1];
 172         for (i = 0; i < n_data; i++) {
 173                 error->data[i] = dest;
 174                 memcpy(dest, data[i], datalen[i]);
 175                 dest += datalen[i];
 176         }
 177         error->data[n_data] = NULL;
 178
 179         if (subsystem)
 180                 error->subsystem = strcpy(d_subsys, subsystem);
 181
 182         if (code)
 183                 error->code = strcpy(d_code, code);
 184 }
 185
 186 static void
 187 interface_data_del(struct interface *iface, struct interface_data *data)
 188 {
 189         avl_delete(&iface->data, &data->node);
 190         free(data);
 191 }
 192
 193 static void
 194 interface_data_flush(struct interface *iface)
 195 {
 196         struct interface_data *d, *tmp;
 197
 198         avl_for_each_element_safe(&iface->data, d, node, tmp)
 199                 interface_data_del(iface, d);
 200 }
 201
 202 int
 203 interface_add_data(struct interface *iface, const struct blob_attr *data)
 204 {
 205         struct interface_data *n, *o;
 206
 207         if (!blobmsg_check_attr(data, true))
 208                 return UBUS_STATUS_INVALID_ARGUMENT;
 209
 210         const char *name = blobmsg_name(data);
 211         unsigned len = blob_pad_len(data);
 212
 213         o = avl_find_element(&iface->data, name, o, node);
 214         if (o) {
 215                 if (blob_pad_len(o->data) == len && !memcmp(o->data, data, len))
 216                         return 0;
 217
 218                 interface_data_del(iface, o);
 219         }
 220
 221         n = calloc(1, sizeof(*n) + len);
 222         if (!n)
 223                 return UBUS_STATUS_UNKNOWN_ERROR;
 224
 225         memcpy(n->data, data, len);
 226         n->node.key = blobmsg_name(n->data);
 227         avl_insert(&iface->data, &n->node);
 228
 229         iface->updated |= IUF_DATA;
 230         return 0;
 231 }
 232
 233 int interface_parse_data(struct interface *iface, const struct blob_attr *attr)
 234 {
 235         struct blob_attr *cur;
 236         size_t rem;
 237         int ret;
 238
 239         iface->updated = 0;
 240
 241         blob_for_each_attr(cur, attr, rem) {
 242                 ret = interface_add_data(iface, cur);
 243                 if (ret)
 244                         return ret;
 245         }
 246
 247         if (iface->updated && iface->state == IFS_UP)
 248                 interface_event(iface, IFEV_UPDATE);
 249
 250         return 0;
 251 }
 252
 253 static void
 254 interface_event(struct interface *iface, enum interface_event ev)
 255 {
 256         struct interface_user *dep, *tmp;
 257         struct device *adev = NULL;
 258
 259         list_for_each_entry_safe(dep, tmp, &iface->users, list)
 260                 dep->cb(dep, iface, ev);
 261
 262         list_for_each_entry_safe(dep, tmp, &iface_all_users, list)
 263                 dep->cb(dep, iface, ev);
 264
 265         switch (ev) {
 266         case IFEV_UP:
 267                 interface_error_flush(iface);
 268                 adev = iface->l3_dev.dev;
 269                 fallthrough;
 270         case IFEV_DOWN:
 271         case IFEV_UP_FAILED:
 272                 alias_notify_device(iface->name, adev);
 273                 break;
 274         default:
 275                 break;
 276         }
 277 }
 278
 279 static void
 280 interface_flush_state(struct interface *iface)
 281 {
 282         if (iface->l3_dev.dev)
 283                 device_release(&iface->l3_dev);
 284         interface_data_flush(iface);
 285 }
 286
 287 static void
 288 mark_interface_down(struct interface *iface)
 289 {
 290         enum interface_state state = iface->state;
 291
 292         if (state == IFS_DOWN)
 293                 return;
 294
 295         iface->link_up_event = false;
 296         iface->state = IFS_DOWN;
 297         switch (state) {
 298         case IFS_UP:
 299         case IFS_TEARDOWN:
 300                 interface_event(iface, IFEV_DOWN);
 301                 break;
 302         case IFS_SETUP:
 303                 interface_event(iface, IFEV_UP_FAILED);
 304                 break;
 305         default:
 306                 break;
 307         }
 308         interface_ip_set_enabled(&iface->config_ip, false);
 309         interface_ip_set_enabled(&iface->proto_ip, false);
 310         interface_ip_flush(&iface->proto_ip);
 311         interface_flush_state(iface);
 312         system_flush_routes();
 313 }
 314
 315 static inline void
 316 __set_config_state(struct interface *iface, enum interface_config_state s)
 317 {
 318         iface->config_state = s;
 319 }
 320
 321 static void
 322 __interface_set_down(struct interface *iface, bool force)
 323 {
 324         enum interface_state state = iface->state;
 325         switch (state) {
 326         case IFS_UP:
 327         case IFS_SETUP:
 328                 iface->state = IFS_TEARDOWN;
 329                 if (iface->dynamic)
 330                         __set_config_state(iface, IFC_REMOVE);
 331
 332                 if (state == IFS_UP)
 333                         interface_event(iface, IFEV_DOWN);
 334
 335                 interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
 336                 if (force)
 337                         interface_flush_state(iface);
 338                 break;
 339
 340         case IFS_DOWN:
 341                 if (iface->main_dev.dev)
 342                         device_release(&iface->main_dev);
 343                 break;
 344         case IFS_TEARDOWN:
 345         default:
 346                 break;
 347         }
 348 }
 349
 350 static int
 351 __interface_set_up(struct interface *iface)
 352 {
 353         int ret;
 354
 355         netifd_log_message(L_NOTICE, "Interface '%s' is setting up now\n", iface->name);
 356
 357         iface->state = IFS_SETUP;
 358         ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
 359         if (ret)
 360                 mark_interface_down(iface);
 361
 362         return ret;
 363 }
 364
 365 static void
 366 interface_check_state(struct interface *iface)
 367 {
 368         bool link_state = iface->link_state || interface_force_link(iface);
 369
 370         switch (iface->state) {
 371         case IFS_UP:
 372         case IFS_SETUP:
 373                 if (!iface->enabled || !link_state) {
 374                         iface->state = IFS_TEARDOWN;
 375                         if (iface->dynamic)
 376                                 __set_config_state(iface, IFC_REMOVE);
 377
 378                         interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
 379                 }
 380                 break;
 381         case IFS_DOWN:
 382                 if (!iface->available)
 383                         return;
 384
 385                 if (iface->autostart && iface->enabled && link_state && !config_init)
 386                         __interface_set_up(iface);
 387                 break;
 388         default:
 389                 break;
 390         }
 391 }
 392
 393 static void
 394 interface_set_enabled(struct interface *iface, bool new_state)
 395 {
 396         if (iface->enabled == new_state)
 397                 return;
 398
 399         netifd_log_message(L_NOTICE, "Interface '%s' is %s\n", iface->name, new_state ? "enabled" : "disabled");
 400         iface->enabled = new_state;
 401         interface_check_state(iface);
 402 }
 403
 404 static void
 405 interface_set_link_state(struct interface *iface, bool new_state)
 406 {
 407         if (iface->link_state == new_state)
 408                 return;
 409
 410         netifd_log_message(L_NOTICE, "Interface '%s' has link connectivity %s\n", iface->name, new_state ? "" : "loss");
 411         iface->link_state = new_state;
 412         interface_check_state(iface);
 413
 414         if (new_state && interface_force_link(iface) &&
 415             iface->state == IFS_UP && !iface->link_up_event) {
 416                 interface_event(iface, IFEV_LINK_UP);
 417                 iface->link_up_event = true;
 418         }
 419 }
 420
 421 static void
 422 interface_ext_dev_cb(struct device_user *dep, enum device_event ev)
 423 {
 424         if (ev == DEV_EVENT_REMOVE)
 425                 device_remove_user(dep);
 426 }
 427
 428 static void
 429 interface_main_dev_cb(struct device_user *dep, enum device_event ev)
 430 {
 431         struct interface *iface;
 432
 433         iface = container_of(dep, struct interface, main_dev);
 434         switch (ev) {
 435         case DEV_EVENT_ADD:
 436                 interface_set_available(iface, true);
 437                 break;
 438         case DEV_EVENT_REMOVE:
 439                 interface_set_available(iface, false);
 440                 if (dep->dev && dep->dev->external && !dep->dev->sys_present)
 441                         interface_set_main_dev(iface, NULL);
 442                 break;
 443         case DEV_EVENT_UP:
 444                 interface_set_enabled(iface, true);
 445                 break;
 446         case DEV_EVENT_DOWN:
 447                 interface_set_enabled(iface, false);
 448                 break;
 449         case DEV_EVENT_AUTH_UP:
 450         case DEV_EVENT_LINK_UP:
 451         case DEV_EVENT_LINK_DOWN:
 452                 interface_set_link_state(iface, device_link_active(dep->dev));
 453                 break;
 454         case DEV_EVENT_TOPO_CHANGE:
 455                 interface_proto_event(iface->proto, PROTO_CMD_RENEW, false);
 456                 return;
 457         default:
 458                 break;
 459         }
 460 }
 461
 462 static void
 463 interface_l3_dev_cb(struct device_user *dep, enum device_event ev)
 464 {
 465         struct interface *iface;
 466
 467         iface = container_of(dep, struct interface, l3_dev);
 468         if (iface->l3_dev.dev == iface->main_dev.dev)
 469                 return;
 470
 471         switch (ev) {
 472         case DEV_EVENT_LINK_DOWN:
 473                 if (iface->proto_handler->flags & PROTO_FLAG_TEARDOWN_ON_L3_LINK_DOWN)
 474                         interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
 475                 break;
 476         default:
 477                 break;
 478         }
 479 }
 480
 481 void
 482 interface_set_available(struct interface *iface, bool new_state)
 483 {
 484         if (iface->available == new_state)
 485                 return;
 486
 487         D(INTERFACE, "Interface '%s', available=%d", iface->name, new_state);
 488         iface->available = new_state;
 489
 490         if (new_state) {
 491                 if (iface->autostart && !config_init)
 492                         interface_set_up(iface);
 493         } else
 494                 __interface_set_down(iface, true);
 495 }
 496
 497 void
 498 interface_add_user(struct interface_user *dep, struct interface *iface)
 499 {
 500         if (!iface) {
 501                 list_add(&dep->list, &iface_all_users);
 502                 return;
 503         }
 504
 505         dep->iface = iface;
 506         list_add(&dep->list, &iface->users);
 507         if (iface->state == IFS_UP)
 508                 dep->cb(dep, iface, IFEV_UP);
 509 }
 510
 511 void
 512 interface_remove_user(struct interface_user *dep)
 513 {
 514         list_del_init(&dep->list);
 515         dep->iface = NULL;
 516 }
 517
 518 static void
 519 interface_add_assignment_classes(struct interface *iface, struct blob_attr *list)
 520 {
 521         struct blob_attr *cur;
 522         size_t rem;
 523
 524         blobmsg_for_each_attr(cur, list, rem) {
 525                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 526                         continue;
 527
 528                 if (!blobmsg_check_attr(cur, false))
 529                         continue;
 530
 531                 struct interface_assignment_class *c = malloc(sizeof(*c) + blobmsg_data_len(cur));
 532                 memcpy(c->name, blobmsg_data(cur), blobmsg_data_len(cur));
 533                 list_add(&c->head, &iface->assignment_classes);
 534         }
 535 }
 536
 537 static void
 538 interface_clear_assignment_classes(struct interface *iface)
 539 {
 540         while (!list_empty(&iface->assignment_classes)) {
 541                 struct interface_assignment_class *c = list_first_entry(&iface->assignment_classes,
 542                                 struct interface_assignment_class, head);
 543                 list_del(&c->head);
 544                 free(c);
 545         }
 546 }
 547
 548 static void
 549 interface_merge_assignment_data(struct interface *old, struct interface *new)
 550 {
 551         bool changed = (old->assignment_hint != new->assignment_hint ||
 552                         old->assignment_length != new->assignment_length ||
 553                         old->assignment_iface_id_selection != new->assignment_iface_id_selection ||
 554                         old->assignment_weight != new->assignment_weight ||
 555                         (old->assignment_iface_id_selection == IFID_FIXED &&
 556                          memcmp(&old->assignment_fixed_iface_id, &new->assignment_fixed_iface_id,
 557                                 sizeof(old->assignment_fixed_iface_id))) ||
 558                         list_empty(&old->assignment_classes) != list_empty(&new->assignment_classes));
 559
 560         struct interface_assignment_class *c;
 561         list_for_each_entry(c, &new->assignment_classes, head) {
 562                 /* Compare list entries one-by-one to see if there was a change */
 563                 if (list_empty(&old->assignment_classes)) /* The new list is longer */
 564                         changed = true;
 565
 566                 if (changed)
 567                         break;
 568
 569                 struct interface_assignment_class *c_old = list_first_entry(&old->assignment_classes,
 570                                 struct interface_assignment_class, head);
 571
 572                 if (strcmp(c_old->name, c->name)) /* An entry didn't match */
 573                         break;
 574
 575                 list_del(&c_old->head);
 576                 free(c_old);
 577         }
 578
 579         /* The old list was longer than the new one or the last entry didn't match */
 580         if (!list_empty(&old->assignment_classes)) {
 581                 interface_clear_assignment_classes(old);
 582                 changed = true;
 583         }
 584
 585         list_splice_init(&new->assignment_classes, &old->assignment_classes);
 586
 587         if (changed) {
 588                 old->assignment_hint = new->assignment_hint;
 589                 old->assignment_length = new->assignment_length;
 590                 old->assignment_iface_id_selection = new->assignment_iface_id_selection;
 591                 old->assignment_fixed_iface_id = new->assignment_fixed_iface_id;
 592                 old->assignment_weight = new->assignment_weight;
 593                 interface_refresh_assignments(true);
 594         }
 595 }
 596
 597 static void
 598 interface_alias_cb(struct interface_user *dep, struct interface *iface, enum interface_event ev)
 599 {
 600         struct interface *alias = container_of(dep, struct interface, parent_iface);
 601         struct device *dev = iface->l3_dev.dev;
 602
 603         switch (ev) {
 604         case IFEV_UP:
 605                 if (!dev)
 606                         return;
 607
 608                 interface_set_main_dev(alias, dev);
 609                 interface_set_available(alias, true);
 610                 break;
 611         case IFEV_DOWN:
 612         case IFEV_UP_FAILED:
 613                 interface_set_available(alias, false);
 614                 interface_set_main_dev(alias, NULL);
 615                 break;
 616         case IFEV_FREE:
 617                 interface_remove_user(dep);
 618                 break;
 619         default:
 620                 break;
 621         }
 622 }
 623
 624 static void
 625 interface_set_device_config(struct interface *iface, struct device *dev)
 626 {
 627         if (!dev || !dev->default_config)
 628                 return;
 629
 630         if (!iface->device_config &&
 631             (!dev->iface_config || dev->config_iface != iface))
 632                 return;
 633
 634         dev->config_iface = iface;
 635         dev->iface_config = iface->device_config;
 636         device_apply_config(dev, dev->type, iface->config);
 637 }
 638
 639 static void
 640 interface_claim_device(struct interface *iface)
 641 {
 642         struct interface *parent;
 643         struct device *dev = NULL;
 644
 645         if (iface->parent_iface.iface)
 646                 interface_remove_user(&iface->parent_iface);
 647
 648         if (iface->parent_ifname) {
 649                 parent = vlist_find(&interfaces, iface->parent_ifname, parent, node);
 650                 iface->parent_iface.cb = interface_alias_cb;
 651                 interface_add_user(&iface->parent_iface, parent);
 652         } else if (iface->device &&
 653                 !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
 654                 dev = device_get(iface->device, true);
 655                 interface_set_device_config(iface, dev);
 656         } else {
 657                 dev = iface->ext_dev.dev;
 658         }
 659
 660         if (dev)
 661                 interface_set_main_dev(iface, dev);
 662
 663         if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
 664                 interface_set_available(iface, true);
 665 }
 666
 667 static void
 668 interface_cleanup_state(struct interface *iface)
 669 {
 670         interface_set_available(iface, false);
 671
 672         interface_flush_state(iface);
 673         interface_clear_errors(iface);
 674         interface_set_proto_state(iface, NULL);
 675
 676         interface_set_main_dev(iface, NULL);
 677         interface_set_l3_dev(iface, NULL);
 678 }
 679
 680 static void
 681 interface_cleanup(struct interface *iface)
 682 {
 683         struct interface_user *dep, *tmp;
 684
 685         uloop_timeout_cancel(&iface->remove_timer);
 686         device_remove_user(&iface->ext_dev);
 687
 688         if (iface->parent_iface.iface)
 689                 interface_remove_user(&iface->parent_iface);
 690
 691         list_for_each_entry_safe(dep, tmp, &iface->users, list)
 692                 interface_remove_user(dep);
 693
 694         interface_clear_assignment_classes(iface);
 695         interface_ip_flush(&iface->config_ip);
 696         interface_cleanup_state(iface);
 697 }
 698
 699 static void
 700 interface_do_free(struct interface *iface)
 701 {
 702         interface_event(iface, IFEV_FREE);
 703         interface_cleanup(iface);
 704         free(iface->config);
 705         netifd_ubus_remove_interface(iface);
 706         avl_delete(&interfaces.avl, &iface->node.avl);
 707         if (iface->jail)
 708                 free(iface->jail);
 709         if (iface->jail_device)
 710                 free(iface->jail_device);
 711         if (iface->host_device)
 712                 free(iface->host_device);
 713
 714         free(iface);
 715 }
 716
 717 static void
 718 interface_do_reload(struct interface *iface)
 719 {
 720         interface_event(iface, IFEV_RELOAD);
 721         interface_cleanup_state(iface);
 722         proto_init_interface(iface, iface->config);
 723         interface_claim_device(iface);
 724 }
 725
 726 static void
 727 interface_handle_config_change(struct interface *iface)
 728 {
 729         enum interface_config_state state = iface->config_state;
 730
 731         iface->config_state = IFC_NORMAL;
 732         switch(state) {
 733         case IFC_NORMAL:
 734                 break;
 735         case IFC_RELOAD:
 736                 interface_do_reload(iface);
 737                 break;
 738         case IFC_REMOVE:
 739                 interface_do_free(iface);
 740                 return;
 741         }
 742         if (iface->autostart)
 743                 interface_set_up(iface);
 744 }
 745
 746 static void
 747 interface_proto_event_cb(struct interface_proto_state *state, enum interface_proto_event ev)
 748 {
 749         struct interface *iface = state->iface;
 750
 751         switch (ev) {
 752         case IFPEV_UP:
 753                 if (iface->state != IFS_SETUP) {
 754                         if (iface->state == IFS_UP && iface->updated)
 755                                 interface_event(iface, IFEV_UPDATE);
 756                         return;
 757                 }
 758
 759                 if (!iface->l3_dev.dev)
 760                         interface_set_l3_dev(iface, iface->main_dev.dev);
 761
 762                 interface_ip_set_enabled(&iface->config_ip, true);
 763                 interface_ip_set_enabled(&iface->proto_ip, true);
 764                 system_flush_routes();
 765                 iface->state = IFS_UP;
 766                 iface->start_time = system_get_rtime();
 767                 interface_event(iface, IFEV_UP);
 768                 netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
 769                 break;
 770         case IFPEV_DOWN:
 771                 if (iface->state == IFS_DOWN)
 772                         return;
 773
 774                 netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
 775                 mark_interface_down(iface);
 776                 interface_write_resolv_conf(iface->jail);
 777                 if (iface->main_dev.dev && !(iface->config_state == IFC_NORMAL && iface->autostart && iface->available))
 778                         device_release(&iface->main_dev);
 779                 if (iface->l3_dev.dev)
 780                         device_remove_user(&iface->l3_dev);
 781                 interface_handle_config_change(iface);
 782                 return;
 783         case IFPEV_LINK_LOST:
 784                 if (iface->state != IFS_UP)
 785                         return;
 786
 787                 netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
 788                 mark_interface_down(iface);
 789                 iface->state = IFS_SETUP;
 790                 break;
 791         default:
 792                 return;
 793         }
 794
 795         interface_write_resolv_conf(iface->jail);
 796 }
 797
 798 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
 799 {
 800         if (iface->proto) {
 801                 iface->proto->free(iface->proto);
 802                 iface->proto = NULL;
 803         }
 804         iface->state = IFS_DOWN;
 805         iface->proto = state;
 806         if (!state)
 807                 return;
 808
 809         state->proto_event = interface_proto_event_cb;
 810         state->iface = iface;
 811 }
 812
 813 struct interface *
 814 interface_alloc(const char *name, struct blob_attr *config, bool dynamic)
 815 {
 816         struct interface *iface;
 817         struct blob_attr *tb[IFACE_ATTR_MAX];
 818         struct blob_attr *cur;
 819         const char *proto_name = NULL;
 820         char *iface_name;
 821         bool force_link = false;
 822
 823         iface = calloc_a(sizeof(*iface), &iface_name, strlen(name) + 1);
 824         iface->name = strcpy(iface_name, name);
 825         INIT_LIST_HEAD(&iface->errors);
 826         INIT_LIST_HEAD(&iface->users);
 827         INIT_LIST_HEAD(&iface->hotplug_list);
 828         INIT_LIST_HEAD(&iface->assignment_classes);
 829         interface_ip_init(iface);
 830         avl_init(&iface->data, avl_strcmp, false, NULL);
 831         iface->config_ip.enabled = false;
 832
 833         iface->main_dev.cb = interface_main_dev_cb;
 834         iface->l3_dev.cb = interface_l3_dev_cb;
 835         iface->ext_dev.cb = interface_ext_dev_cb;
 836
 837         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
 838                       blob_data(config), blob_len(config));
 839
 840         iface->zone = NULL;
 841         if ((cur = tb[IFACE_ATTR_ZONE]))
 842                 iface->zone = strdup(blobmsg_get_string(cur));
 843
 844         if ((cur = tb[IFACE_ATTR_PROTO]))
 845                 proto_name = blobmsg_data(cur);
 846
 847         proto_attach_interface(iface, proto_name);
 848         if (iface->proto_handler->flags & PROTO_FLAG_FORCE_LINK_DEFAULT)
 849                 force_link = true;
 850
 851         iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
 852         iface->force_link = blobmsg_get_bool_default(tb[IFACE_ATTR_FORCE_LINK], force_link);
 853         iface->dynamic = dynamic;
 854         iface->proto_ip.no_defaultroute =
 855                 !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
 856         iface->proto_ip.no_dns =
 857                 !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
 858
 859         if ((cur = tb[IFACE_ATTR_DNS]))
 860                 interface_add_dns_server_list(&iface->config_ip, cur);
 861
 862         if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
 863                 interface_add_dns_search_list(&iface->config_ip, cur);
 864
 865         if ((cur = tb[IFACE_ATTR_DNS_METRIC]))
 866                 iface->dns_metric = blobmsg_get_u32(cur);
 867
 868         if ((cur = tb[IFACE_ATTR_METRIC]))
 869                 iface->metric = blobmsg_get_u32(cur);
 870
 871         if ((cur = tb[IFACE_ATTR_IP6ASSIGN]))
 872                 iface->assignment_length = blobmsg_get_u32(cur);
 873
 874         /* defaults */
 875         iface->assignment_iface_id_selection = IFID_FIXED;
 876         iface->assignment_fixed_iface_id = in6addr_any;
 877         iface->assignment_fixed_iface_id.s6_addr[15] = 1;
 878
 879         if ((cur = tb[IFACE_ATTR_IP6IFACEID])) {
 880                 const char *ifaceid = blobmsg_data(cur);
 881                 if (!strcmp(ifaceid, "random")) {
 882                         iface->assignment_iface_id_selection = IFID_RANDOM;
 883                 }
 884                 else if (!strcmp(ifaceid, "eui64")) {
 885                         iface->assignment_iface_id_selection = IFID_EUI64;
 886                 }
 887                 else {
 888                         /* we expect an IPv6 address with network id zero here -> fixed iface id
 889                            if we cannot parse -> revert to iface id 1 */
 890                         if (inet_pton(AF_INET6,ifaceid,&iface->assignment_fixed_iface_id) != 1 ||
 891                                         iface->assignment_fixed_iface_id.s6_addr32[0] != 0 ||
 892                                         iface->assignment_fixed_iface_id.s6_addr32[1] != 0) {
 893                                 iface->assignment_fixed_iface_id = in6addr_any;
 894                                 iface->assignment_fixed_iface_id.s6_addr[15] = 1;
 895                                 netifd_log_message(L_WARNING, "Failed to parse ip6ifaceid for interface '%s', \
 896                                                         falling back to iface id 1.\n", iface->name);
 897                         }
 898                 }
 899         }
 900
 901         iface->assignment_hint = -1;
 902         if ((cur = tb[IFACE_ATTR_IP6HINT]))
 903                 iface->assignment_hint = strtol(blobmsg_get_string(cur), NULL, 16) &
 904                                 ~((1 << (64 - iface->assignment_length)) - 1);
 905
 906         if ((cur = tb[IFACE_ATTR_IP6CLASS]))
 907                 interface_add_assignment_classes(iface, cur);
 908
 909         if ((cur = tb[IFACE_ATTR_IP6WEIGHT]))
 910                 iface->assignment_weight = blobmsg_get_u32(cur);
 911
 912         if ((cur = tb[IFACE_ATTR_IP4TABLE])) {
 913                 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip4table))
 914                         D(INTERFACE, "Failed to resolve routing table: %s", (char *) blobmsg_data(cur));
 915         }
 916
 917         if ((cur = tb[IFACE_ATTR_IP6TABLE])) {
 918                 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip6table))
 919                         D(INTERFACE, "Failed to resolve routing table: %s", (char *) blobmsg_data(cur));
 920         }
 921
 922         iface->proto_ip.no_delegation = !blobmsg_get_bool_default(tb[IFACE_ATTR_DELEGATE], true);
 923
 924         iface->config_autostart = iface->autostart;
 925         iface->jail = NULL;
 926
 927         if ((cur = tb[IFACE_ATTR_JAIL])) {
 928                 iface->jail = strdup(blobmsg_get_string(cur));
 929                 iface->autostart = false;
 930         }
 931
 932         iface->jail_device = NULL;
 933         if ((cur = tb[IFACE_ATTR_JAIL_DEVICE]))
 934                 iface->jail_device = strdup(blobmsg_get_string(cur));
 935         else if ((cur = tb[IFACE_ATTR_JAIL_IFNAME]))
 936                 iface->jail_device = strdup(blobmsg_get_string(cur));
 937
 938         iface->host_device = NULL;
 939         if ((cur = tb[IFACE_ATTR_HOST_DEVICE]))
 940                 iface->host_device = strdup(blobmsg_get_string(cur));
 941
 942         return iface;
 943 }
 944
 945 static bool __interface_add(struct interface *iface, struct blob_attr *config, bool alias)
 946 {
 947         struct blob_attr *tb[IFACE_ATTR_MAX];
 948         struct blob_attr *cur;
 949         char *name = NULL;
 950
 951         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
 952                       blob_data(config), blob_len(config));
 953
 954         if (alias) {
 955                 if ((cur = tb[IFACE_ATTR_INTERFACE]))
 956                         iface->parent_ifname = blobmsg_data(cur);
 957
 958                 if (!iface->parent_ifname)
 959                         return false;
 960         } else {
 961                 cur = tb[IFACE_ATTR_DEVICE];
 962                 if (!cur)
 963                         cur = tb[IFACE_ATTR_IFNAME];
 964                 if (cur)
 965                         iface->device = blobmsg_data(cur);
 966         }
 967
 968         if (iface->dynamic) {
 969                 name = strdup(iface->name);
 970
 971                 if (!name)
 972                         return false;
 973         }
 974
 975         iface->config = config;
 976         vlist_add(&interfaces, &iface->node, iface->name);
 977
 978         if (name) {
 979                 iface = vlist_find(&interfaces, name, iface, node);
 980                 free(name);
 981
 982                 /* Don't delete dynamic interface on reload */
 983                 if (iface)
 984                         iface->node.version = -1;
 985         }
 986
 987         return true;
 988 }
 989
 990 bool
 991 interface_add(struct interface *iface, struct blob_attr *config)
 992 {
 993         return __interface_add(iface, config, false);
 994 }
 995
 996 bool
 997 interface_add_alias(struct interface *iface, struct blob_attr *config)
 998 {
 999         if (iface->proto_handler->flags & PROTO_FLAG_NODEV)
1000                 return false;
1001
1002         return __interface_add(iface, config, true);
1003 }
1004
1005 void
1006 interface_set_l3_dev(struct interface *iface, struct device *dev)
1007 {
1008         bool enabled = iface->config_ip.enabled;
1009         bool claimed = iface->l3_dev.claimed;
1010
1011         if (iface->l3_dev.dev == dev)
1012                 return;
1013
1014         interface_ip_set_enabled(&iface->config_ip, false);
1015         interface_ip_set_enabled(&iface->proto_ip, false);
1016         interface_ip_flush(&iface->proto_ip);
1017         device_add_user(&iface->l3_dev, dev);
1018
1019         if (dev) {
1020                 if (claimed) {
1021                         if (device_claim(&iface->l3_dev) < 0)
1022                                 return;
1023                 }
1024                 interface_ip_set_enabled(&iface->config_ip, enabled);
1025                 interface_ip_set_enabled(&iface->proto_ip, enabled);
1026         }
1027 }
1028
1029 static void
1030 interface_set_main_dev(struct interface *iface, struct device *dev)
1031 {
1032         bool claimed = iface->l3_dev.claimed;
1033
1034         if (iface->main_dev.dev == dev)
1035                 return;
1036
1037         interface_set_available(iface, false);
1038         device_add_user(&iface->main_dev, dev);
1039         if (!dev) {
1040                 interface_set_link_state(iface, false);
1041                 return;
1042         }
1043
1044         if (claimed) {
1045                 if (device_claim(&iface->l3_dev) < 0)
1046                         return;
1047         }
1048
1049         if (!iface->l3_dev.dev)
1050                 interface_set_l3_dev(iface, dev);
1051 }
1052
1053 static int
1054 interface_remove_link(struct interface *iface, struct device *dev,
1055                       struct blob_attr *vlan)
1056 {
1057         struct device *mdev = iface->main_dev.dev;
1058
1059         if (mdev && mdev->hotplug_ops)
1060                 return mdev->hotplug_ops->del(mdev, dev, vlan);
1061
1062         if (dev == iface->ext_dev.dev)
1063                 device_remove_user(&iface->ext_dev);
1064
1065         if (!iface->main_dev.hotplug)
1066                 return UBUS_STATUS_INVALID_ARGUMENT;
1067
1068         if (dev != iface->main_dev.dev)
1069                 return UBUS_STATUS_INVALID_ARGUMENT;
1070
1071         interface_set_main_dev(iface, NULL);
1072         return 0;
1073 }
1074
1075 static int
1076 interface_add_link(struct interface *iface, struct device *dev,
1077                    struct blob_attr *vlan, bool link_ext)
1078 {
1079         struct device *mdev = iface->main_dev.dev;
1080
1081         if (mdev == dev)
1082                 return 0;
1083
1084         if (iface->main_dev.hotplug)
1085                 device_remove_user(&iface->main_dev);
1086
1087         if (mdev) {
1088                 if (mdev->hotplug_ops)
1089                         return mdev->hotplug_ops->add(mdev, dev, vlan);
1090                 else
1091                         return UBUS_STATUS_NOT_SUPPORTED;
1092         }
1093
1094         if (link_ext)
1095                 device_add_user(&iface->ext_dev, dev);
1096
1097         interface_set_main_dev(iface, dev);
1098         iface->main_dev.hotplug = true;
1099         return 0;
1100 }
1101
1102 int
1103 interface_handle_link(struct interface *iface, const char *name,
1104                       struct blob_attr *vlan, bool add, bool link_ext)
1105 {
1106         struct device *dev;
1107
1108         dev = device_get(name, add ? (link_ext ? 2 : 1) : 0);
1109         if (!dev)
1110                 return UBUS_STATUS_NOT_FOUND;
1111
1112         if (!add)
1113                 return interface_remove_link(iface, dev, vlan);
1114
1115         interface_set_device_config(iface, dev);
1116         if (!link_ext)
1117                 device_set_present(dev, true);
1118
1119         return interface_add_link(iface, dev, vlan, link_ext);
1120 }
1121
1122 void
1123 interface_set_up(struct interface *iface)
1124 {
1125         int ret;
1126         const char *error = NULL;
1127
1128         iface->autostart = true;
1129         wireless_check_network_enabled();
1130
1131         if (iface->state != IFS_DOWN)
1132                 return;
1133
1134         interface_clear_errors(iface);
1135         if (iface->available) {
1136                 if (iface->main_dev.dev) {
1137                         ret = device_claim(&iface->main_dev);
1138                         if (!ret)
1139                                 interface_check_state(iface);
1140                         else
1141                                 error = "DEVICE_CLAIM_FAILED";
1142                 } else {
1143                         ret = __interface_set_up(iface);
1144                         if (ret)
1145                                 error = "SETUP_FAILED";
1146                 }
1147         } else
1148                 error = "NO_DEVICE";
1149
1150         if (error)
1151                 interface_add_error(iface, "interface", error, NULL, 0);
1152 }
1153
1154 void
1155 interface_set_down(struct interface *iface)
1156 {
1157         if (!iface) {
1158                 vlist_for_each_element(&interfaces, iface, node)
1159                         __interface_set_down(iface, false);
1160         } else {
1161                 iface->autostart = false;
1162                 wireless_check_network_enabled();
1163                 __interface_set_down(iface, false);
1164         }
1165 }
1166
1167 int
1168 interface_renew(struct interface *iface)
1169 {
1170         if (iface->state == IFS_TEARDOWN || iface->state == IFS_DOWN)
1171                 return -1;
1172
1173         return interface_proto_event(iface->proto, PROTO_CMD_RENEW, false);
1174 }
1175
1176 void
1177 interface_start_pending(void)
1178 {
1179         struct interface *iface;
1180
1181         vlist_for_each_element(&interfaces, iface, node) {
1182                 if (iface->autostart)
1183                         interface_set_up(iface);
1184         }
1185 }
1186
1187 void
1188 interface_start_jail(int netns_fd, const char *jail)
1189 {
1190         struct interface *iface;
1191
1192         vlist_for_each_element(&interfaces, iface, node) {
1193                 if (!iface->jail || strcmp(iface->jail, jail))
1194                         continue;
1195
1196                 system_link_netns_move(iface->main_dev.dev, netns_fd, iface->jail_device);
1197         }
1198 }
1199
1200 void
1201 interface_stop_jail(int netns_fd)
1202 {
1203         struct interface *iface;
1204         char *orig_ifname;
1205
1206         vlist_for_each_element(&interfaces, iface, node) {
1207                 orig_ifname = iface->host_device;
1208                 interface_set_down(iface);
1209                 system_link_netns_move(iface->main_dev.dev, netns_fd, orig_ifname);
1210         }
1211 }
1212
1213 static void
1214 set_config_state(struct interface *iface, enum interface_config_state s)
1215 {
1216         __set_config_state(iface, s);
1217         if (iface->state == IFS_DOWN)
1218                 interface_handle_config_change(iface);
1219         else
1220                 __interface_set_down(iface, false);
1221 }
1222
1223 void
1224 interface_update_start(struct interface *iface, const bool keep_old)
1225 {
1226         iface->updated = 0;
1227
1228         if (!keep_old)
1229                 interface_ip_update_start(&iface->proto_ip);
1230 }
1231
1232 void
1233 interface_update_complete(struct interface *iface)
1234 {
1235         interface_ip_update_complete(&iface->proto_ip);
1236 }
1237
1238 static void
1239 interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
1240 {
1241         vlist_simple_replace(&new->dns_servers, &old->dns_servers);
1242         vlist_simple_replace(&new->dns_search, &old->dns_search);
1243 }
1244
1245 static bool
1246 interface_device_config_changed(struct interface *if_old, struct interface *if_new)
1247 {
1248         struct blob_attr *ntb[__DEV_ATTR_MAX];
1249         struct blob_attr *otb[__DEV_ATTR_MAX];
1250         struct device *dev = if_old->main_dev.dev;
1251         unsigned long diff[2] = {};
1252
1253         BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
1254
1255         if (!dev)
1256                 return false;
1257
1258         if (if_old->device_config != if_new->device_config)
1259                 return true;
1260
1261         if (!if_new->device_config)
1262                 return false;
1263
1264         blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb,
1265                 blob_data(if_old->config), blob_len(if_old->config));
1266
1267         blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, ntb,
1268                 blob_data(if_new->config), blob_len(if_new->config));
1269
1270         uci_blob_diff(ntb, otb, &device_attr_list, diff);
1271
1272         return diff[0] | diff[1];
1273 }
1274
1275 static void
1276 interface_change_config(struct interface *if_old, struct interface *if_new)
1277 {
1278         struct blob_attr *old_config = if_old->config;
1279         bool reload = false, reload_ip = false, update_prefix_delegation = false;
1280
1281 #define FIELD_CHANGED_STR(field)                                        \
1282                 ((!!if_old->field != !!if_new->field) ||                \
1283                  (if_old->field &&                                      \
1284                   strcmp(if_old->field, if_new->field) != 0))
1285
1286         if (FIELD_CHANGED_STR(parent_ifname)) {
1287                 if (if_old->parent_iface.iface)
1288                         interface_remove_user(&if_old->parent_iface);
1289                 reload = true;
1290         }
1291
1292         if (!reload && interface_device_config_changed(if_old, if_new))
1293                 reload = true;
1294
1295         if (FIELD_CHANGED_STR(device) ||
1296             if_old->proto_handler != if_new->proto_handler)
1297                 reload = true;
1298
1299         if (!if_old->proto_handler->config_params)
1300                 D(INTERFACE, "No config parameters for interface '%s'",
1301                   if_old->name);
1302         else if (!uci_blob_check_equal(if_old->config, if_new->config,
1303                                        if_old->proto_handler->config_params))
1304                 reload = true;
1305
1306 #define UPDATE(field, __var) ({                                         \
1307                 bool __changed = (if_old->field != if_new->field);      \
1308                 if_old->field = if_new->field;                          \
1309                 __var |= __changed;                                     \
1310         })
1311
1312         if_old->config = if_new->config;
1313         if (if_old->config_autostart != if_new->config_autostart) {
1314                 if (if_old->config_autostart)
1315                         reload = true;
1316
1317                 if_old->autostart = if_new->config_autostart;
1318         }
1319
1320         if_old->device_config = if_new->device_config;
1321         if_old->config_autostart = if_new->config_autostart;
1322         if (if_old->jail)
1323                 free(if_old->jail);
1324
1325         if_old->jail = if_new->jail;
1326         if (if_old->jail)
1327                 if_old->autostart = false;
1328
1329         if (if_old->jail_device)
1330                 free(if_old->jail_device);
1331
1332         if_old->jail_device = if_new->jail_device;
1333
1334         if (if_old->host_device)
1335                 free(if_old->host_device);
1336
1337         if_old->host_device = if_new->host_device;
1338
1339         if_old->device = if_new->device;
1340         if_old->parent_ifname = if_new->parent_ifname;
1341         if_old->dynamic = if_new->dynamic;
1342         if_old->proto_handler = if_new->proto_handler;
1343         if_old->force_link = if_new->force_link;
1344         if_old->dns_metric = if_new->dns_metric;
1345
1346         if (if_old->proto_ip.no_delegation != if_new->proto_ip.no_delegation) {
1347                 if_old->proto_ip.no_delegation = if_new->proto_ip.no_delegation;
1348                 update_prefix_delegation = true;
1349         }
1350
1351         if_old->proto_ip.no_dns = if_new->proto_ip.no_dns;
1352         interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
1353
1354         UPDATE(metric, reload_ip);
1355         UPDATE(proto_ip.no_defaultroute, reload_ip);
1356         UPDATE(ip4table, reload_ip);
1357         UPDATE(ip6table, reload_ip);
1358         interface_merge_assignment_data(if_old, if_new);
1359
1360 #undef UPDATE
1361
1362         if (reload) {
1363                 D(INTERFACE, "Reload interface '%s' because of config changes",
1364                   if_old->name);
1365                 interface_clear_errors(if_old);
1366                 set_config_state(if_old, IFC_RELOAD);
1367                 goto out;
1368         }
1369
1370         if (reload_ip) {
1371                 bool config_ip_enabled = if_old->config_ip.enabled;
1372                 bool proto_ip_enabled = if_old->proto_ip.enabled;
1373
1374                 interface_ip_set_enabled(&if_old->config_ip, false);
1375                 interface_ip_set_enabled(&if_old->proto_ip, false);
1376                 interface_ip_set_enabled(&if_old->proto_ip, proto_ip_enabled);
1377                 interface_ip_set_enabled(&if_old->config_ip, config_ip_enabled);
1378         }
1379
1380         if (update_prefix_delegation)
1381                 interface_update_prefix_delegation(&if_old->proto_ip);
1382
1383         interface_write_resolv_conf(if_old->jail);
1384         if (if_old->main_dev.dev)
1385                 interface_check_state(if_old);
1386
1387 out:
1388         if_new->config = NULL;
1389         interface_cleanup(if_new);
1390         free(old_config);
1391         free(if_new);
1392 }
1393
1394 static void
1395 interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
1396                  struct vlist_node *node_old)
1397 {
1398         struct interface *if_old = container_of(node_old, struct interface, node);
1399         struct interface *if_new = container_of(node_new, struct interface, node);
1400
1401         if (node_old && node_new) {
1402                 D(INTERFACE, "Update interface '%s'", if_new->name);
1403                 interface_change_config(if_old, if_new);
1404         } else if (node_old) {
1405                 D(INTERFACE, "Remove interface '%s'", if_old->name);
1406                 set_config_state(if_old, IFC_REMOVE);
1407         } else if (node_new) {
1408                 D(INTERFACE, "Create interface '%s'", if_new->name);
1409                 interface_event(if_new, IFEV_CREATE);
1410                 proto_init_interface(if_new, if_new->config);
1411                 interface_claim_device(if_new);
1412                 netifd_ubus_add_interface(if_new);
1413         }
1414 }
1415
1416
1417 static void __init
1418 interface_init_list(void)
1419 {
1420         vlist_init(&interfaces, avl_strcmp, interface_update);
1421         interfaces.keep_old = true;
1422         interfaces.no_delete = true;
1423 }