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_JAIL_IFNAME,
  38         IFACE_ATTR_DEFAULTROUTE,
  39         IFACE_ATTR_PEERDNS,
  40         IFACE_ATTR_DNS,
  41         IFACE_ATTR_DNS_SEARCH,
  42         IFACE_ATTR_DNS_METRIC,
  43         IFACE_ATTR_METRIC,
  44         IFACE_ATTR_INTERFACE,
  45         IFACE_ATTR_IP6ASSIGN,
  46         IFACE_ATTR_IP6HINT,
  47         IFACE_ATTR_IP4TABLE,
  48         IFACE_ATTR_IP6TABLE,
  49         IFACE_ATTR_IP6CLASS,
  50         IFACE_ATTR_DELEGATE,
  51         IFACE_ATTR_IP6IFACEID,
  52         IFACE_ATTR_FORCE_LINK,
  53         IFACE_ATTR_IP6WEIGHT,
  54         IFACE_ATTR_MAX
  55 };
  56
  57 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
  58         [IFACE_ATTR_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
  59         [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
  60         [IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
  61         [IFACE_ATTR_JAIL] = { .name = "jail", .type = BLOBMSG_TYPE_STRING },
  62         [IFACE_ATTR_JAIL_IFNAME] = { .name = "jail_ifname", .type = BLOBMSG_TYPE_STRING },
  63         [IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
  64         [IFACE_ATTR_PEERDNS] = { .name = "peerdns", .type = BLOBMSG_TYPE_BOOL },
  65         [IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
  66         [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
  67         [IFACE_ATTR_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
  68         [IFACE_ATTR_DNS_METRIC] = { .name = "dns_metric", .type = BLOBMSG_TYPE_INT32 },
  69         [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
  70         [IFACE_ATTR_IP6ASSIGN] = { .name = "ip6assign", .type = BLOBMSG_TYPE_INT32 },
  71         [IFACE_ATTR_IP6HINT] = { .name = "ip6hint", .type = BLOBMSG_TYPE_STRING },
  72         [IFACE_ATTR_IP4TABLE] = { .name = "ip4table", .type = BLOBMSG_TYPE_STRING },
  73         [IFACE_ATTR_IP6TABLE] = { .name = "ip6table", .type = BLOBMSG_TYPE_STRING },
  74         [IFACE_ATTR_IP6CLASS] = { .name = "ip6class", .type = BLOBMSG_TYPE_ARRAY },
  75         [IFACE_ATTR_DELEGATE] = { .name = "delegate", .type = BLOBMSG_TYPE_BOOL },
  76         [IFACE_ATTR_IP6IFACEID] = { .name = "ip6ifaceid", .type = BLOBMSG_TYPE_STRING },
  77         [IFACE_ATTR_FORCE_LINK] = { .name = "force_link", .type = BLOBMSG_TYPE_BOOL },
  78         [IFACE_ATTR_IP6WEIGHT] = { .name = "ip6weight", .type = BLOBMSG_TYPE_INT32 },
  79 };
  80
  81 const struct uci_blob_param_list interface_attr_list = {
  82         .n_params = IFACE_ATTR_MAX,
  83         .params = iface_attrs,
  84 };
  85
  86 static void
  87 interface_set_main_dev(struct interface *iface, struct device *dev);
  88 static void
  89 interface_event(struct interface *iface, enum interface_event ev);
  90
  91 static void
  92 interface_error_flush(struct interface *iface)
  93 {
  94         struct interface_error *error, *tmp;
  95
  96         list_for_each_entry_safe(error, tmp, &iface->errors, list) {
  97                 list_del(&error->list);
  98                 free(error);
  99         }
 100 }
 101
 102 static bool
 103 interface_force_link(struct interface *iface)
 104 {
 105         struct device *dev = iface->main_dev.dev;
 106
 107         if (dev && dev->settings.auth)
 108                 return false;
 109
 110         return iface->force_link;
 111 }
 112
 113 static void
 114 interface_clear_errors(struct interface *iface)
 115 {
 116         /* don't flush the errors in case the configured protocol handler matches the
 117            running protocol handler and is having the last error capability */
 118         if (!(iface->proto &&
 119               (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
 120               (iface->proto->handler->name == iface->proto_handler->name)))
 121                 interface_error_flush(iface);
 122 }
 123
 124 void interface_add_error(struct interface *iface, const char *subsystem,
 125                          const char *code, const char **data, int n_data)
 126 {
 127         struct interface_error *error;
 128         int i, len = 0;
 129         int *datalen = NULL;
 130         char *dest, *d_subsys, *d_code;
 131
 132         /* if the configured protocol handler has the last error support capability,
 133            errors should only be added if the running protocol handler matches the
 134            configured one */
 135         if (iface->proto &&
 136             (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
 137             (iface->proto->handler->name != iface->proto_handler->name))
 138                 return;
 139
 140         if (n_data) {
 141                 len = n_data * sizeof(char *);
 142                 datalen = alloca(len);
 143                 for (i = 0; i < n_data; i++) {
 144                         datalen[i] = strlen(data[i]) + 1;
 145                         len += datalen[i];
 146                 }
 147         }
 148
 149         error = calloc_a(sizeof(*error) + sizeof(char *) + len,
 150                 &d_subsys, subsystem ? strlen(subsystem) + 1 : 0,
 151                 &d_code, code ? strlen(code) + 1 : 0);
 152         if (!error)
 153                 return;
 154
 155         /* Only keep the last flagged error, prevent this list grows unlimitted in case the
 156            protocol can't be established (e.g auth failure) */
 157         if (iface->proto_handler->flags & PROTO_FLAG_LASTERROR)
 158                 interface_error_flush(iface);
 159
 160         list_add_tail(&error->list, &iface->errors);
 161
 162         dest = (char *) &error->data[n_data + 1];
 163         for (i = 0; i < n_data; i++) {
 164                 error->data[i] = dest;
 165                 memcpy(dest, data[i], datalen[i]);
 166                 dest += datalen[i];
 167         }
 168         error->data[n_data] = NULL;
 169
 170         if (subsystem)
 171                 error->subsystem = strcpy(d_subsys, subsystem);
 172
 173         if (code)
 174                 error->code = strcpy(d_code, code);
 175 }
 176
 177 static void
 178 interface_data_del(struct interface *iface, struct interface_data *data)
 179 {
 180         avl_delete(&iface->data, &data->node);
 181         free(data);
 182 }
 183
 184 static void
 185 interface_data_flush(struct interface *iface)
 186 {
 187         struct interface_data *d, *tmp;
 188
 189         avl_for_each_element_safe(&iface->data, d, node, tmp)
 190                 interface_data_del(iface, d);
 191 }
 192
 193 int
 194 interface_add_data(struct interface *iface, const struct blob_attr *data)
 195 {
 196         struct interface_data *n, *o;
 197
 198         if (!blobmsg_check_attr(data, true))
 199                 return UBUS_STATUS_INVALID_ARGUMENT;
 200
 201         const char *name = blobmsg_name(data);
 202         unsigned len = blob_pad_len(data);
 203
 204         o = avl_find_element(&iface->data, name, o, node);
 205         if (o) {
 206                 if (blob_pad_len(o->data) == len && !memcmp(o->data, data, len))
 207                         return 0;
 208
 209                 interface_data_del(iface, o);
 210         }
 211
 212         n = calloc(1, sizeof(*n) + len);
 213         if (!n)
 214                 return UBUS_STATUS_UNKNOWN_ERROR;
 215
 216         memcpy(n->data, data, len);
 217         n->node.key = blobmsg_name(n->data);
 218         avl_insert(&iface->data, &n->node);
 219
 220         iface->updated |= IUF_DATA;
 221         return 0;
 222 }
 223
 224 int interface_parse_data(struct interface *iface, const struct blob_attr *attr)
 225 {
 226         struct blob_attr *cur;
 227         int rem, ret;
 228
 229         iface->updated = 0;
 230
 231         blob_for_each_attr(cur, attr, rem) {
 232                 ret = interface_add_data(iface, cur);
 233                 if (ret)
 234                         return ret;
 235         }
 236
 237         if (iface->updated && iface->state == IFS_UP)
 238                 interface_event(iface, IFEV_UPDATE);
 239
 240         return 0;
 241 }
 242
 243 static void
 244 interface_event(struct interface *iface, enum interface_event ev)
 245 {
 246         struct interface_user *dep, *tmp;
 247         struct device *adev = NULL;
 248
 249         list_for_each_entry_safe(dep, tmp, &iface->users, list)
 250                 dep->cb(dep, iface, ev);
 251
 252         list_for_each_entry_safe(dep, tmp, &iface_all_users, list)
 253                 dep->cb(dep, iface, ev);
 254
 255         switch (ev) {
 256         case IFEV_UP:
 257                 interface_error_flush(iface);
 258                 adev = iface->l3_dev.dev;
 259                 fallthrough;
 260         case IFEV_DOWN:
 261         case IFEV_UP_FAILED:
 262                 alias_notify_device(iface->name, adev);
 263                 break;
 264         default:
 265                 break;
 266         }
 267 }
 268
 269 static void
 270 interface_flush_state(struct interface *iface)
 271 {
 272         if (iface->l3_dev.dev)
 273                 device_release(&iface->l3_dev);
 274         interface_data_flush(iface);
 275 }
 276
 277 static void
 278 mark_interface_down(struct interface *iface)
 279 {
 280         enum interface_state state = iface->state;
 281
 282         if (state == IFS_DOWN)
 283                 return;
 284
 285         iface->link_up_event = false;
 286         iface->state = IFS_DOWN;
 287         switch (state) {
 288         case IFS_UP:
 289         case IFS_TEARDOWN:
 290                 interface_event(iface, IFEV_DOWN);
 291                 break;
 292         case IFS_SETUP:
 293                 interface_event(iface, IFEV_UP_FAILED);
 294                 break;
 295         default:
 296                 break;
 297         }
 298         interface_ip_set_enabled(&iface->config_ip, false);
 299         interface_ip_set_enabled(&iface->proto_ip, false);
 300         interface_ip_flush(&iface->proto_ip);
 301         interface_flush_state(iface);
 302         system_flush_routes();
 303 }
 304
 305 static inline void
 306 __set_config_state(struct interface *iface, enum interface_config_state s)
 307 {
 308         iface->config_state = s;
 309 }
 310
 311 static void
 312 __interface_set_down(struct interface *iface, bool force)
 313 {
 314         enum interface_state state = iface->state;
 315         switch (state) {
 316         case IFS_UP:
 317         case IFS_SETUP:
 318                 iface->state = IFS_TEARDOWN;
 319                 if (iface->dynamic)
 320                         __set_config_state(iface, IFC_REMOVE);
 321
 322                 if (state == IFS_UP)
 323                         interface_event(iface, IFEV_DOWN);
 324
 325                 interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
 326                 if (force)
 327                         interface_flush_state(iface);
 328                 break;
 329
 330         case IFS_DOWN:
 331                 if (iface->main_dev.dev)
 332                         device_release(&iface->main_dev);
 333                 break;
 334         case IFS_TEARDOWN:
 335         default:
 336                 break;
 337         }
 338 }
 339
 340 static int
 341 __interface_set_up(struct interface *iface)
 342 {
 343         int ret;
 344
 345         netifd_log_message(L_NOTICE, "Interface '%s' is setting up now\n", iface->name);
 346
 347         iface->state = IFS_SETUP;
 348         ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
 349         if (ret)
 350                 mark_interface_down(iface);
 351
 352         return ret;
 353 }
 354
 355 static void
 356 interface_check_state(struct interface *iface)
 357 {
 358         bool link_state = iface->link_state || interface_force_link(iface);
 359
 360         switch (iface->state) {
 361         case IFS_UP:
 362         case IFS_SETUP:
 363                 if (!iface->enabled || !link_state) {
 364                         iface->state = IFS_TEARDOWN;
 365                         if (iface->dynamic)
 366                                 __set_config_state(iface, IFC_REMOVE);
 367
 368                         interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
 369                 }
 370                 break;
 371         case IFS_DOWN:
 372                 if (!iface->available)
 373                         return;
 374
 375                 if (iface->autostart && iface->enabled && link_state && !config_init)
 376                         __interface_set_up(iface);
 377                 break;
 378         default:
 379                 break;
 380         }
 381 }
 382
 383 static void
 384 interface_set_enabled(struct interface *iface, bool new_state)
 385 {
 386         if (iface->enabled == new_state)
 387                 return;
 388
 389         netifd_log_message(L_NOTICE, "Interface '%s' is %s\n", iface->name, new_state ? "enabled" : "disabled");
 390         iface->enabled = new_state;
 391         interface_check_state(iface);
 392 }
 393
 394 static void
 395 interface_set_link_state(struct interface *iface, bool new_state)
 396 {
 397         if (iface->link_state == new_state)
 398                 return;
 399
 400         netifd_log_message(L_NOTICE, "Interface '%s' has link connectivity %s\n", iface->name, new_state ? "" : "loss");
 401         iface->link_state = new_state;
 402         interface_check_state(iface);
 403
 404         if (new_state && interface_force_link(iface) &&
 405             iface->state == IFS_UP && !iface->link_up_event) {
 406                 interface_event(iface, IFEV_LINK_UP);
 407                 iface->link_up_event = true;
 408         }
 409 }
 410
 411 static void
 412 interface_ext_dev_cb(struct device_user *dep, enum device_event ev)
 413 {
 414         if (ev == DEV_EVENT_REMOVE)
 415                 device_remove_user(dep);
 416 }
 417
 418 static void
 419 interface_main_dev_cb(struct device_user *dep, enum device_event ev)
 420 {
 421         struct interface *iface;
 422
 423         iface = container_of(dep, struct interface, main_dev);
 424         switch (ev) {
 425         case DEV_EVENT_ADD:
 426                 interface_set_available(iface, true);
 427                 break;
 428         case DEV_EVENT_REMOVE:
 429                 interface_set_available(iface, false);
 430                 if (dep->dev && dep->dev->external)
 431                         interface_set_main_dev(iface, NULL);
 432                 break;
 433         case DEV_EVENT_UP:
 434                 interface_set_enabled(iface, true);
 435                 break;
 436         case DEV_EVENT_DOWN:
 437                 interface_set_enabled(iface, false);
 438                 break;
 439         case DEV_EVENT_AUTH_UP:
 440         case DEV_EVENT_LINK_UP:
 441         case DEV_EVENT_LINK_DOWN:
 442                 interface_set_link_state(iface, device_link_active(dep->dev));
 443                 break;
 444         case DEV_EVENT_TOPO_CHANGE:
 445                 interface_proto_event(iface->proto, PROTO_CMD_RENEW, false);
 446                 return;
 447         default:
 448                 break;
 449         }
 450 }
 451
 452 static void
 453 interface_l3_dev_cb(struct device_user *dep, enum device_event ev)
 454 {
 455         struct interface *iface;
 456
 457         iface = container_of(dep, struct interface, l3_dev);
 458         if (iface->l3_dev.dev == iface->main_dev.dev)
 459                 return;
 460
 461         switch (ev) {
 462         case DEV_EVENT_LINK_DOWN:
 463                 if (iface->proto_handler->flags & PROTO_FLAG_TEARDOWN_ON_L3_LINK_DOWN)
 464                         interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
 465                 break;
 466         default:
 467                 break;
 468         }
 469 }
 470
 471 void
 472 interface_set_available(struct interface *iface, bool new_state)
 473 {
 474         if (iface->available == new_state)
 475                 return;
 476
 477         D(INTERFACE, "Interface '%s', available=%d\n", iface->name, new_state);
 478         iface->available = new_state;
 479
 480         if (new_state) {
 481                 if (iface->autostart && !config_init)
 482                         interface_set_up(iface);
 483         } else
 484                 __interface_set_down(iface, true);
 485 }
 486
 487 void
 488 interface_add_user(struct interface_user *dep, struct interface *iface)
 489 {
 490         if (!iface) {
 491                 list_add(&dep->list, &iface_all_users);
 492                 return;
 493         }
 494
 495         dep->iface = iface;
 496         list_add(&dep->list, &iface->users);
 497         if (iface->state == IFS_UP)
 498                 dep->cb(dep, iface, IFEV_UP);
 499 }
 500
 501 void
 502 interface_remove_user(struct interface_user *dep)
 503 {
 504         list_del_init(&dep->list);
 505         dep->iface = NULL;
 506 }
 507
 508 static void
 509 interface_add_assignment_classes(struct interface *iface, struct blob_attr *list)
 510 {
 511         struct blob_attr *cur;
 512         int rem;
 513
 514         blobmsg_for_each_attr(cur, list, rem) {
 515                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 516                         continue;
 517
 518                 if (!blobmsg_check_attr(cur, false))
 519                         continue;
 520
 521                 struct interface_assignment_class *c = malloc(sizeof(*c) + blobmsg_data_len(cur));
 522                 memcpy(c->name, blobmsg_data(cur), blobmsg_data_len(cur));
 523                 list_add(&c->head, &iface->assignment_classes);
 524         }
 525 }
 526
 527 static void
 528 interface_clear_assignment_classes(struct interface *iface)
 529 {
 530         while (!list_empty(&iface->assignment_classes)) {
 531                 struct interface_assignment_class *c = list_first_entry(&iface->assignment_classes,
 532                                 struct interface_assignment_class, head);
 533                 list_del(&c->head);
 534                 free(c);
 535         }
 536 }
 537
 538 static void
 539 interface_merge_assignment_data(struct interface *old, struct interface *new)
 540 {
 541         bool changed = (old->assignment_hint != new->assignment_hint ||
 542                         old->assignment_length != new->assignment_length ||
 543                         old->assignment_iface_id_selection != new->assignment_iface_id_selection ||
 544                         old->assignment_weight != new->assignment_weight ||
 545                         (old->assignment_iface_id_selection == IFID_FIXED &&
 546                          memcmp(&old->assignment_fixed_iface_id, &new->assignment_fixed_iface_id,
 547                                 sizeof(old->assignment_fixed_iface_id))) ||
 548                         list_empty(&old->assignment_classes) != list_empty(&new->assignment_classes));
 549
 550         struct interface_assignment_class *c;
 551         list_for_each_entry(c, &new->assignment_classes, head) {
 552                 /* Compare list entries one-by-one to see if there was a change */
 553                 if (list_empty(&old->assignment_classes)) /* The new list is longer */
 554                         changed = true;
 555
 556                 if (changed)
 557                         break;
 558
 559                 struct interface_assignment_class *c_old = list_first_entry(&old->assignment_classes,
 560                                 struct interface_assignment_class, head);
 561
 562                 if (strcmp(c_old->name, c->name)) /* An entry didn't match */
 563                         break;
 564
 565                 list_del(&c_old->head);
 566                 free(c_old);
 567         }
 568
 569         /* The old list was longer than the new one or the last entry didn't match */
 570         if (!list_empty(&old->assignment_classes)) {
 571                 interface_clear_assignment_classes(old);
 572                 changed = true;
 573         }
 574
 575         list_splice_init(&new->assignment_classes, &old->assignment_classes);
 576
 577         if (changed) {
 578                 old->assignment_hint = new->assignment_hint;
 579                 old->assignment_length = new->assignment_length;
 580                 old->assignment_iface_id_selection = new->assignment_iface_id_selection;
 581                 old->assignment_fixed_iface_id = new->assignment_fixed_iface_id;
 582                 old->assignment_weight = new->assignment_weight;
 583                 interface_refresh_assignments(true);
 584         }
 585 }
 586
 587 static void
 588 interface_alias_cb(struct interface_user *dep, struct interface *iface, enum interface_event ev)
 589 {
 590         struct interface *alias = container_of(dep, struct interface, parent_iface);
 591         struct device *dev = iface->l3_dev.dev;
 592
 593         switch (ev) {
 594         case IFEV_UP:
 595                 if (!dev)
 596                         return;
 597
 598                 interface_set_main_dev(alias, dev);
 599                 interface_set_available(alias, true);
 600                 break;
 601         case IFEV_DOWN:
 602         case IFEV_UP_FAILED:
 603                 interface_set_available(alias, false);
 604                 interface_set_main_dev(alias, NULL);
 605                 break;
 606         case IFEV_FREE:
 607                 interface_remove_user(dep);
 608                 break;
 609         default:
 610                 break;
 611         }
 612 }
 613
 614 static void
 615 interface_set_device_config(struct interface *iface, struct device *dev)
 616 {
 617         if (!dev || !dev->default_config)
 618                 return;
 619
 620         if (!iface->device_config &&
 621             (!dev->iface_config || dev->config_iface != iface))
 622                 return;
 623
 624         dev->config_iface = iface;
 625         dev->iface_config = iface->device_config;
 626         device_apply_config(dev, dev->type, iface->config);
 627 }
 628
 629 static void
 630 interface_claim_device(struct interface *iface)
 631 {
 632         struct interface *parent;
 633         struct device *dev = NULL;
 634
 635         if (iface->parent_iface.iface)
 636                 interface_remove_user(&iface->parent_iface);
 637
 638         device_lock();
 639
 640         if (iface->parent_ifname) {
 641                 parent = vlist_find(&interfaces, iface->parent_ifname, parent, node);
 642                 iface->parent_iface.cb = interface_alias_cb;
 643                 interface_add_user(&iface->parent_iface, parent);
 644         } else if (iface->ifname &&
 645                 !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
 646                 dev = device_get(iface->ifname, true);
 647                 interface_set_device_config(iface, dev);
 648         } else {
 649                 dev = iface->ext_dev.dev;
 650         }
 651
 652         if (dev)
 653                 interface_set_main_dev(iface, dev);
 654
 655         device_unlock();
 656
 657         if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
 658                 interface_set_available(iface, true);
 659 }
 660
 661 static void
 662 interface_cleanup_state(struct interface *iface)
 663 {
 664         interface_set_available(iface, false);
 665
 666         interface_flush_state(iface);
 667         interface_clear_errors(iface);
 668         interface_set_proto_state(iface, NULL);
 669
 670         interface_set_main_dev(iface, NULL);
 671         interface_set_l3_dev(iface, NULL);
 672 }
 673
 674 static void
 675 interface_cleanup(struct interface *iface)
 676 {
 677         struct interface_user *dep, *tmp;
 678
 679         uloop_timeout_cancel(&iface->remove_timer);
 680         device_remove_user(&iface->ext_dev);
 681
 682         if (iface->parent_iface.iface)
 683                 interface_remove_user(&iface->parent_iface);
 684
 685         list_for_each_entry_safe(dep, tmp, &iface->users, list)
 686                 interface_remove_user(dep);
 687
 688         interface_clear_assignment_classes(iface);
 689         interface_ip_flush(&iface->config_ip);
 690         interface_cleanup_state(iface);
 691 }
 692
 693 static void
 694 interface_do_free(struct interface *iface)
 695 {
 696         interface_event(iface, IFEV_FREE);
 697         interface_cleanup(iface);
 698         free(iface->config);
 699         netifd_ubus_remove_interface(iface);
 700         avl_delete(&interfaces.avl, &iface->node.avl);
 701         if (iface->jail)
 702                 free(iface->jail);
 703         if (iface->jail_ifname)
 704                 free(iface->jail_ifname);
 705
 706         free(iface);
 707 }
 708
 709 static void
 710 interface_do_reload(struct interface *iface)
 711 {
 712         interface_event(iface, IFEV_RELOAD);
 713         interface_cleanup_state(iface);
 714         proto_init_interface(iface, iface->config);
 715         interface_claim_device(iface);
 716 }
 717
 718 static void
 719 interface_handle_config_change(struct interface *iface)
 720 {
 721         enum interface_config_state state = iface->config_state;
 722
 723         iface->config_state = IFC_NORMAL;
 724         switch(state) {
 725         case IFC_NORMAL:
 726                 break;
 727         case IFC_RELOAD:
 728                 interface_do_reload(iface);
 729                 break;
 730         case IFC_REMOVE:
 731                 interface_do_free(iface);
 732                 return;
 733         }
 734         if (iface->autostart)
 735                 interface_set_up(iface);
 736 }
 737
 738 static void
 739 interface_proto_event_cb(struct interface_proto_state *state, enum interface_proto_event ev)
 740 {
 741         struct interface *iface = state->iface;
 742
 743         switch (ev) {
 744         case IFPEV_UP:
 745                 if (iface->state != IFS_SETUP) {
 746                         if (iface->state == IFS_UP && iface->updated)
 747                                 interface_event(iface, IFEV_UPDATE);
 748                         return;
 749                 }
 750
 751                 if (!iface->l3_dev.dev)
 752                         interface_set_l3_dev(iface, iface->main_dev.dev);
 753
 754                 interface_ip_set_enabled(&iface->config_ip, true);
 755                 interface_ip_set_enabled(&iface->proto_ip, true);
 756                 system_flush_routes();
 757                 iface->state = IFS_UP;
 758                 iface->start_time = system_get_rtime();
 759                 interface_event(iface, IFEV_UP);
 760                 netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
 761                 break;
 762         case IFPEV_DOWN:
 763                 if (iface->state == IFS_DOWN)
 764                         return;
 765
 766                 netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
 767                 mark_interface_down(iface);
 768                 if (iface->main_dev.dev)
 769                         device_release(&iface->main_dev);
 770                 if (iface->l3_dev.dev)
 771                         device_remove_user(&iface->l3_dev);
 772                 interface_handle_config_change(iface);
 773                 break;
 774         case IFPEV_LINK_LOST:
 775                 if (iface->state != IFS_UP)
 776                         return;
 777
 778                 netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
 779                 mark_interface_down(iface);
 780                 iface->state = IFS_SETUP;
 781                 break;
 782         default:
 783                 return;
 784         }
 785
 786         interface_write_resolv_conf(iface->jail);
 787 }
 788
 789 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
 790 {
 791         if (iface->proto) {
 792                 iface->proto->free(iface->proto);
 793                 iface->proto = NULL;
 794         }
 795         iface->state = IFS_DOWN;
 796         iface->proto = state;
 797         if (!state)
 798                 return;
 799
 800         state->proto_event = interface_proto_event_cb;
 801         state->iface = iface;
 802 }
 803
 804 struct interface *
 805 interface_alloc(const char *name, struct blob_attr *config, bool dynamic)
 806 {
 807         struct interface *iface;
 808         struct blob_attr *tb[IFACE_ATTR_MAX];
 809         struct blob_attr *cur;
 810         const char *proto_name = NULL;
 811         char *iface_name;
 812         bool force_link = false;
 813
 814         iface = calloc_a(sizeof(*iface), &iface_name, strlen(name) + 1);
 815         iface->name = strcpy(iface_name, name);
 816         INIT_LIST_HEAD(&iface->errors);
 817         INIT_LIST_HEAD(&iface->users);
 818         INIT_LIST_HEAD(&iface->hotplug_list);
 819         INIT_LIST_HEAD(&iface->assignment_classes);
 820         interface_ip_init(iface);
 821         avl_init(&iface->data, avl_strcmp, false, NULL);
 822         iface->config_ip.enabled = false;
 823
 824         iface->main_dev.cb = interface_main_dev_cb;
 825         iface->l3_dev.cb = interface_l3_dev_cb;
 826         iface->ext_dev.cb = interface_ext_dev_cb;
 827
 828         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
 829                       blob_data(config), blob_len(config));
 830
 831         if ((cur = tb[IFACE_ATTR_PROTO]))
 832                 proto_name = blobmsg_data(cur);
 833
 834         proto_attach_interface(iface, proto_name);
 835         if (iface->proto_handler->flags & PROTO_FLAG_FORCE_LINK_DEFAULT)
 836                 force_link = true;
 837
 838         iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
 839         iface->force_link = blobmsg_get_bool_default(tb[IFACE_ATTR_FORCE_LINK], force_link);
 840         iface->dynamic = dynamic;
 841         iface->proto_ip.no_defaultroute =
 842                 !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
 843         iface->proto_ip.no_dns =
 844                 !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
 845
 846         if ((cur = tb[IFACE_ATTR_DNS]))
 847                 interface_add_dns_server_list(&iface->config_ip, cur);
 848
 849         if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
 850                 interface_add_dns_search_list(&iface->config_ip, cur);
 851
 852         if ((cur = tb[IFACE_ATTR_DNS_METRIC]))
 853                 iface->dns_metric = blobmsg_get_u32(cur);
 854
 855         if ((cur = tb[IFACE_ATTR_METRIC]))
 856                 iface->metric = blobmsg_get_u32(cur);
 857
 858         if ((cur = tb[IFACE_ATTR_IP6ASSIGN]))
 859                 iface->assignment_length = blobmsg_get_u32(cur);
 860
 861         /* defaults */
 862         iface->assignment_iface_id_selection = IFID_FIXED;
 863         iface->assignment_fixed_iface_id = in6addr_any;
 864         iface->assignment_fixed_iface_id.s6_addr[15] = 1;
 865
 866         if ((cur = tb[IFACE_ATTR_IP6IFACEID])) {
 867                 const char *ifaceid = blobmsg_data(cur);
 868                 if (!strcmp(ifaceid, "random")) {
 869                         iface->assignment_iface_id_selection = IFID_RANDOM;
 870                 }
 871                 else if (!strcmp(ifaceid, "eui64")) {
 872                         iface->assignment_iface_id_selection = IFID_EUI64;
 873                 }
 874                 else {
 875                         /* we expect an IPv6 address with network id zero here -> fixed iface id
 876                            if we cannot parse -> revert to iface id 1 */
 877                         if (inet_pton(AF_INET6,ifaceid,&iface->assignment_fixed_iface_id) != 1 ||
 878                                         iface->assignment_fixed_iface_id.s6_addr32[0] != 0 ||
 879                                         iface->assignment_fixed_iface_id.s6_addr32[1] != 0) {
 880                                 iface->assignment_fixed_iface_id = in6addr_any;
 881                                 iface->assignment_fixed_iface_id.s6_addr[15] = 1;
 882                                 netifd_log_message(L_WARNING, "Failed to parse ip6ifaceid for interface '%s', \
 883                                                         falling back to iface id 1.\n", iface->name);
 884                         }
 885                 }
 886         }
 887
 888         iface->assignment_hint = -1;
 889         if ((cur = tb[IFACE_ATTR_IP6HINT]))
 890                 iface->assignment_hint = strtol(blobmsg_get_string(cur), NULL, 16) &
 891                                 ~((1 << (64 - iface->assignment_length)) - 1);
 892
 893         if ((cur = tb[IFACE_ATTR_IP6CLASS]))
 894                 interface_add_assignment_classes(iface, cur);
 895
 896         if ((cur = tb[IFACE_ATTR_IP6WEIGHT]))
 897                 iface->assignment_weight = blobmsg_get_u32(cur);
 898
 899         if ((cur = tb[IFACE_ATTR_IP4TABLE])) {
 900                 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip4table))
 901                         DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
 902         }
 903
 904         if ((cur = tb[IFACE_ATTR_IP6TABLE])) {
 905                 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip6table))
 906                         DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
 907         }
 908
 909         iface->proto_ip.no_delegation = !blobmsg_get_bool_default(tb[IFACE_ATTR_DELEGATE], true);
 910
 911         iface->config_autostart = iface->autostart;
 912         iface->jail = NULL;
 913
 914         if ((cur = tb[IFACE_ATTR_JAIL])) {
 915                 iface->jail = strdup(blobmsg_get_string(cur));
 916                 iface->autostart = false;
 917         }
 918
 919         iface->jail_ifname = NULL;
 920         if ((cur = tb[IFACE_ATTR_JAIL_IFNAME]))
 921                 iface->jail_ifname = strdup(blobmsg_get_string(cur));
 922
 923         return iface;
 924 }
 925
 926 static bool __interface_add(struct interface *iface, struct blob_attr *config, bool alias)
 927 {
 928         struct blob_attr *tb[IFACE_ATTR_MAX];
 929         struct blob_attr *cur;
 930         char *name = NULL;
 931
 932         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
 933                       blob_data(config), blob_len(config));
 934
 935         if (alias) {
 936                 if ((cur = tb[IFACE_ATTR_INTERFACE]))
 937                         iface->parent_ifname = blobmsg_data(cur);
 938
 939                 if (!iface->parent_ifname)
 940                         return false;
 941         } else {
 942                 if ((cur = tb[IFACE_ATTR_IFNAME]))
 943                         iface->ifname = blobmsg_data(cur);
 944         }
 945
 946         if (iface->dynamic) {
 947                 name = strdup(iface->name);
 948
 949                 if (!name)
 950                         return false;
 951         }
 952
 953         iface->config = config;
 954         vlist_add(&interfaces, &iface->node, iface->name);
 955
 956         if (name) {
 957                 iface = vlist_find(&interfaces, name, iface, node);
 958                 free(name);
 959
 960                 /* Don't delete dynamic interface on reload */
 961                 if (iface)
 962                         iface->node.version = -1;
 963         }
 964
 965         return true;
 966 }
 967
 968 bool
 969 interface_add(struct interface *iface, struct blob_attr *config)
 970 {
 971         return __interface_add(iface, config, false);
 972 }
 973
 974 bool
 975 interface_add_alias(struct interface *iface, struct blob_attr *config)
 976 {
 977         if (iface->proto_handler->flags & PROTO_FLAG_NODEV)
 978                 return false;
 979
 980         return __interface_add(iface, config, true);
 981 }
 982
 983 void
 984 interface_set_l3_dev(struct interface *iface, struct device *dev)
 985 {
 986         bool enabled = iface->config_ip.enabled;
 987         bool claimed = iface->l3_dev.claimed;
 988
 989         if (iface->l3_dev.dev == dev)
 990                 return;
 991
 992         interface_ip_set_enabled(&iface->config_ip, false);
 993         interface_ip_set_enabled(&iface->proto_ip, false);
 994         interface_ip_flush(&iface->proto_ip);
 995         device_add_user(&iface->l3_dev, dev);
 996
 997         if (dev) {
 998                 if (claimed) {
 999                         if (device_claim(&iface->l3_dev) < 0)
1000                                 return;
1001                 }
1002                 interface_ip_set_enabled(&iface->config_ip, enabled);
1003                 interface_ip_set_enabled(&iface->proto_ip, enabled);
1004         }
1005 }
1006
1007 static void
1008 interface_set_main_dev(struct interface *iface, struct device *dev)
1009 {
1010         bool claimed = iface->l3_dev.claimed;
1011
1012         if (iface->main_dev.dev == dev)
1013                 return;
1014
1015         interface_set_available(iface, false);
1016         device_add_user(&iface->main_dev, dev);
1017         if (!dev) {
1018                 interface_set_link_state(iface, false);
1019                 return;
1020         }
1021
1022         if (claimed) {
1023                 if (device_claim(&iface->l3_dev) < 0)
1024                         return;
1025         }
1026
1027         if (!iface->l3_dev.dev)
1028                 interface_set_l3_dev(iface, dev);
1029 }
1030
1031 static int
1032 interface_remove_link(struct interface *iface, struct device *dev)
1033 {
1034         struct device *mdev = iface->main_dev.dev;
1035
1036         if (mdev && mdev->hotplug_ops)
1037                 return mdev->hotplug_ops->del(mdev, dev);
1038
1039         if (dev == iface->ext_dev.dev)
1040                 device_remove_user(&iface->ext_dev);
1041
1042         if (!iface->main_dev.hotplug)
1043                 return UBUS_STATUS_INVALID_ARGUMENT;
1044
1045         if (dev != iface->main_dev.dev)
1046                 return UBUS_STATUS_INVALID_ARGUMENT;
1047
1048         interface_set_main_dev(iface, NULL);
1049         return 0;
1050 }
1051
1052 static int
1053 interface_add_link(struct interface *iface, struct device *dev,
1054                    struct blob_attr *vlan, bool link_ext)
1055 {
1056         struct device *mdev = iface->main_dev.dev;
1057
1058         if (mdev == dev)
1059                 return 0;
1060
1061         if (iface->main_dev.hotplug)
1062                 device_remove_user(&iface->main_dev);
1063
1064         if (mdev) {
1065                 if (mdev->hotplug_ops)
1066                         return mdev->hotplug_ops->add(mdev, dev, vlan);
1067                 else
1068                         return UBUS_STATUS_NOT_SUPPORTED;
1069         }
1070
1071         if (link_ext)
1072                 device_add_user(&iface->ext_dev, dev);
1073
1074         interface_set_main_dev(iface, dev);
1075         iface->main_dev.hotplug = true;
1076         return 0;
1077 }
1078
1079 int
1080 interface_handle_link(struct interface *iface, const char *name,
1081                       struct blob_attr *vlan, bool add, bool link_ext)
1082 {
1083         struct device *dev;
1084         int ret;
1085
1086         device_lock();
1087
1088         dev = device_get(name, add ? (link_ext ? 2 : 1) : 0);
1089         if (!dev) {
1090                 ret = UBUS_STATUS_NOT_FOUND;
1091                 goto out;
1092         }
1093
1094         if (add) {
1095                 interface_set_device_config(iface, dev);
1096                 if (!link_ext)
1097                         device_set_present(dev, true);
1098
1099                 ret = interface_add_link(iface, dev, vlan, link_ext);
1100         } else {
1101                 ret = interface_remove_link(iface, dev);
1102         }
1103
1104 out:
1105         device_unlock();
1106
1107         return ret;
1108 }
1109
1110 void
1111 interface_set_up(struct interface *iface)
1112 {
1113         int ret;
1114         const char *error = NULL;
1115
1116         iface->autostart = true;
1117
1118         if (iface->state != IFS_DOWN)
1119                 return;
1120
1121         interface_clear_errors(iface);
1122         if (iface->available) {
1123                 if (iface->main_dev.dev) {
1124                         ret = device_claim(&iface->main_dev);
1125                         if (!ret)
1126                                 interface_check_state(iface);
1127                         else
1128                                 error = "DEVICE_CLAIM_FAILED";
1129                 } else {
1130                         ret = __interface_set_up(iface);
1131                         if (ret)
1132                                 error = "SETUP_FAILED";
1133                 }
1134         } else
1135                 error = "NO_DEVICE";
1136
1137         if (error)
1138                 interface_add_error(iface, "interface", error, NULL, 0);
1139 }
1140
1141 void
1142 interface_set_down(struct interface *iface)
1143 {
1144         if (!iface) {
1145                 vlist_for_each_element(&interfaces, iface, node)
1146                         __interface_set_down(iface, false);
1147         } else {
1148                 iface->autostart = false;
1149                 __interface_set_down(iface, false);
1150         }
1151 }
1152
1153 int
1154 interface_renew(struct interface *iface)
1155 {
1156         if (iface->state == IFS_TEARDOWN || iface->state == IFS_DOWN)
1157                 return -1;
1158
1159         return interface_proto_event(iface->proto, PROTO_CMD_RENEW, false);
1160 }
1161
1162 void
1163 interface_start_pending(void)
1164 {
1165         struct interface *iface;
1166
1167         vlist_for_each_element(&interfaces, iface, node) {
1168                 if (iface->autostart)
1169                         interface_set_up(iface);
1170         }
1171 }
1172
1173 void
1174 interface_start_jail(const char *jail, const pid_t netns_pid)
1175 {
1176         struct interface *iface;
1177         int netns_fd;
1178         int wstatus;
1179         pid_t pr = 0;
1180
1181         netns_fd = system_netns_open(netns_pid);
1182         if (netns_fd < 0)
1183                 return;
1184
1185         vlist_for_each_element(&interfaces, iface, node) {
1186                 if (!iface->jail || strcmp(iface->jail, jail))
1187                         continue;
1188
1189                 system_link_netns_move(iface->main_dev.dev, netns_fd, iface->jail_ifname);
1190         }
1191
1192         close(netns_fd);
1193
1194         pr = fork();
1195         if (pr) {
1196                 waitpid(pr, &wstatus, WUNTRACED | WCONTINUED);
1197                 return;
1198         }
1199
1200         /* child process */
1201         netns_fd = system_netns_open(netns_pid);
1202         if (netns_fd < 0)
1203                 return;
1204
1205         system_netns_set(netns_fd);
1206         system_init();
1207         vlist_for_each_element(&interfaces, iface, node) {
1208                 if (!iface->jail || strcmp(iface->jail, jail))
1209                         continue;
1210
1211                 /*
1212                  * The interface has already been renamed and is inside target
1213                  * namespace, hence overwrite ifname with jail_ifname for
1214                  * interface_set_up().
1215                  * We are inside a fork which got it's own copy of the interfaces
1216                  * list, so we can mess with it :)
1217                  */
1218                 if (iface->jail_ifname)
1219                         iface->ifname = iface->jail_ifname;
1220
1221                 interface_do_reload(iface);
1222                 interface_set_up(iface);
1223         }
1224
1225         close(netns_fd);
1226         _exit(0);
1227 }
1228
1229 void
1230 interface_stop_jail(const char *jail, const pid_t netns_pid)
1231 {
1232         struct interface *iface;
1233         int netns_fd, root_netns;
1234         int wstatus;
1235         pid_t parent_pid = getpid();
1236         pid_t pr = 0;
1237         const char *orig_ifname;
1238
1239         pr = fork();
1240         if (pr) {
1241                 waitpid(pr, &wstatus, WUNTRACED | WCONTINUED);
1242                 return;
1243         }
1244
1245         /* child process */
1246         root_netns = system_netns_open(parent_pid);
1247         if (root_netns < 0)
1248                 return;
1249
1250         netns_fd = system_netns_open(netns_pid);
1251         if (netns_fd < 0)
1252                 return;
1253
1254         system_netns_set(netns_fd);
1255         system_init();
1256         vlist_for_each_element(&interfaces, iface, node) {
1257                 if (!iface->jail || strcmp(iface->jail, jail))
1258                         continue;
1259
1260                 orig_ifname = iface->ifname;
1261                 if (iface->jail_ifname)
1262                         iface->ifname = iface->jail_ifname;
1263
1264                 interface_do_reload(iface);
1265                 interface_set_down(iface);
1266                 system_link_netns_move(iface->main_dev.dev, root_netns, orig_ifname);
1267         }
1268
1269         close(root_netns);
1270         close(netns_fd);
1271         _exit(0);
1272 }
1273
1274 static void
1275 set_config_state(struct interface *iface, enum interface_config_state s)
1276 {
1277         __set_config_state(iface, s);
1278         if (iface->state == IFS_DOWN)
1279                 interface_handle_config_change(iface);
1280         else
1281                 __interface_set_down(iface, false);
1282 }
1283
1284 void
1285 interface_update_start(struct interface *iface, const bool keep_old)
1286 {
1287         iface->updated = 0;
1288
1289         if (!keep_old)
1290                 interface_ip_update_start(&iface->proto_ip);
1291 }
1292
1293 void
1294 interface_update_complete(struct interface *iface)
1295 {
1296         interface_ip_update_complete(&iface->proto_ip);
1297 }
1298
1299 static void
1300 interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
1301 {
1302         vlist_simple_replace(&new->dns_servers, &old->dns_servers);
1303         vlist_simple_replace(&new->dns_search, &old->dns_search);
1304 }
1305
1306 static bool
1307 interface_device_config_changed(struct interface *if_old, struct interface *if_new)
1308 {
1309         struct blob_attr *ntb[__DEV_ATTR_MAX];
1310         struct blob_attr *otb[__DEV_ATTR_MAX];
1311         struct device *dev = if_old->main_dev.dev;
1312         unsigned long diff = 0;
1313
1314         BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
1315
1316         if (!dev)
1317                 return false;
1318
1319         if (if_old->device_config != if_new->device_config)
1320                 return true;
1321
1322         if (!if_new->device_config)
1323                 return false;
1324
1325         blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb,
1326                 blob_data(if_old->config), blob_len(if_old->config));
1327
1328         blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, ntb,
1329                 blob_data(if_new->config), blob_len(if_new->config));
1330
1331         uci_blob_diff(ntb, otb, &device_attr_list, &diff);
1332         return diff;
1333 }
1334
1335 static void
1336 interface_change_config(struct interface *if_old, struct interface *if_new)
1337 {
1338         struct blob_attr *old_config = if_old->config;
1339         bool reload = false, reload_ip = false, update_prefix_delegation = false;
1340
1341 #define FIELD_CHANGED_STR(field)                                        \
1342                 ((!!if_old->field != !!if_new->field) ||                \
1343                  (if_old->field &&                                      \
1344                   strcmp(if_old->field, if_new->field) != 0))
1345
1346         if (FIELD_CHANGED_STR(parent_ifname)) {
1347                 if (if_old->parent_iface.iface)
1348                         interface_remove_user(&if_old->parent_iface);
1349                 reload = true;
1350         }
1351
1352         if (!reload && interface_device_config_changed(if_old, if_new))
1353                 reload = true;
1354
1355         if (FIELD_CHANGED_STR(ifname) ||
1356             if_old->proto_handler != if_new->proto_handler)
1357                 reload = true;
1358
1359         if (!if_old->proto_handler->config_params)
1360                 D(INTERFACE, "No config parameters for interface '%s'\n",
1361                   if_old->name);
1362         else if (!uci_blob_check_equal(if_old->config, if_new->config,
1363                                        if_old->proto_handler->config_params))
1364                 reload = true;
1365
1366 #define UPDATE(field, __var) ({                                         \
1367                 bool __changed = (if_old->field != if_new->field);      \
1368                 if_old->field = if_new->field;                          \
1369                 __var |= __changed;                                     \
1370         })
1371
1372         if_old->config = if_new->config;
1373         if (if_old->config_autostart != if_new->config_autostart) {
1374                 if (if_old->config_autostart)
1375                         reload = true;
1376
1377                 if_old->autostart = if_new->config_autostart;
1378         }
1379
1380         if_old->device_config = if_new->device_config;
1381         if_old->config_autostart = if_new->config_autostart;
1382         if (if_old->jail)
1383                 free(if_old->jail);
1384
1385         if_old->jail = if_new->jail;
1386         if (if_old->jail)
1387                 if_old->autostart = false;
1388
1389         if (if_old->jail_ifname)
1390                 free(if_old->jail_ifname);
1391
1392         if_old->jail_ifname = if_new->jail_ifname;
1393
1394         if_old->ifname = if_new->ifname;
1395         if_old->parent_ifname = if_new->parent_ifname;
1396         if_old->dynamic = if_new->dynamic;
1397         if_old->proto_handler = if_new->proto_handler;
1398         if_old->force_link = if_new->force_link;
1399         if_old->dns_metric = if_new->dns_metric;
1400
1401         if (if_old->proto_ip.no_delegation != if_new->proto_ip.no_delegation) {
1402                 if_old->proto_ip.no_delegation = if_new->proto_ip.no_delegation;
1403                 update_prefix_delegation = true;
1404         }
1405
1406         if_old->proto_ip.no_dns = if_new->proto_ip.no_dns;
1407         interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
1408
1409         UPDATE(metric, reload_ip);
1410         UPDATE(proto_ip.no_defaultroute, reload_ip);
1411         UPDATE(ip4table, reload_ip);
1412         UPDATE(ip6table, reload_ip);
1413         interface_merge_assignment_data(if_old, if_new);
1414
1415 #undef UPDATE
1416
1417         if (reload) {
1418                 D(INTERFACE, "Reload interface '%s' because of config changes\n",
1419                   if_old->name);
1420                 interface_clear_errors(if_old);
1421                 set_config_state(if_old, IFC_RELOAD);
1422                 goto out;
1423         }
1424
1425         if (reload_ip) {
1426                 bool config_ip_enabled = if_old->config_ip.enabled;
1427                 bool proto_ip_enabled = if_old->proto_ip.enabled;
1428
1429                 interface_ip_set_enabled(&if_old->config_ip, false);
1430                 interface_ip_set_enabled(&if_old->proto_ip, false);
1431                 interface_ip_set_enabled(&if_old->proto_ip, proto_ip_enabled);
1432                 interface_ip_set_enabled(&if_old->config_ip, config_ip_enabled);
1433         }
1434
1435         if (update_prefix_delegation)
1436                 interface_update_prefix_delegation(&if_old->proto_ip);
1437
1438         interface_write_resolv_conf(if_old->jail);
1439         if (if_old->main_dev.dev)
1440                 interface_check_state(if_old);
1441
1442 out:
1443         if_new->config = NULL;
1444         interface_cleanup(if_new);
1445         free(old_config);
1446         free(if_new);
1447 }
1448
1449 static void
1450 interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
1451                  struct vlist_node *node_old)
1452 {
1453         struct interface *if_old = container_of(node_old, struct interface, node);
1454         struct interface *if_new = container_of(node_new, struct interface, node);
1455
1456         if (node_old && node_new) {
1457                 D(INTERFACE, "Update interface '%s'\n", if_new->name);
1458                 interface_change_config(if_old, if_new);
1459         } else if (node_old) {
1460                 D(INTERFACE, "Remove interface '%s'\n", if_old->name);
1461                 set_config_state(if_old, IFC_REMOVE);
1462         } else if (node_new) {
1463                 D(INTERFACE, "Create interface '%s'\n", if_new->name);
1464                 interface_event(if_new, IFEV_CREATE);
1465                 proto_init_interface(if_new, if_new->config);
1466                 interface_claim_device(if_new);
1467                 netifd_ubus_add_interface(if_new);
1468         }
1469 }
1470
1471
1472 static void __init
1473 interface_init_list(void)
1474 {
1475         vlist_init(&interfaces, avl_strcmp, interface_update);
1476         interfaces.keep_old = true;
1477         interfaces.no_delete = true;
1478 }