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                 if (!(iface->proto_handler->flags & PROTO_FLAG_NODEV_CONFIG))
 656                         interface_set_device_config(iface, dev);
 657         } else {
 658                 dev = iface->ext_dev.dev;
 659         }
 660
 661         if (dev)
 662                 interface_set_main_dev(iface, dev);
 663
 664         if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
 665                 interface_set_available(iface, true);
 666 }
 667
 668 static void
 669 interface_cleanup_state(struct interface *iface)
 670 {
 671         interface_set_available(iface, false);
 672
 673         interface_flush_state(iface);
 674         interface_clear_errors(iface);
 675         interface_set_proto_state(iface, NULL);
 676
 677         interface_set_main_dev(iface, NULL);
 678         interface_set_l3_dev(iface, NULL);
 679 }
 680
 681 static void
 682 interface_cleanup(struct interface *iface)
 683 {
 684         struct interface_user *dep, *tmp;
 685
 686         uloop_timeout_cancel(&iface->remove_timer);
 687         device_remove_user(&iface->ext_dev);
 688
 689         if (iface->parent_iface.iface)
 690                 interface_remove_user(&iface->parent_iface);
 691
 692         list_for_each_entry_safe(dep, tmp, &iface->users, list)
 693                 interface_remove_user(dep);
 694
 695         interface_clear_assignment_classes(iface);
 696         interface_ip_flush(&iface->config_ip);
 697         interface_cleanup_state(iface);
 698 }
 699
 700 static void
 701 interface_do_free(struct interface *iface)
 702 {
 703         interface_event(iface, IFEV_FREE);
 704         interface_cleanup(iface);
 705         free(iface->config);
 706         netifd_ubus_remove_interface(iface);
 707         avl_delete(&interfaces.avl, &iface->node.avl);
 708         if (iface->jail)
 709                 free(iface->jail);
 710         if (iface->jail_device)
 711                 free(iface->jail_device);
 712         if (iface->host_device)
 713                 free(iface->host_device);
 714
 715         free(iface);
 716 }
 717
 718 static void
 719 interface_do_reload(struct interface *iface)
 720 {
 721         interface_event(iface, IFEV_RELOAD);
 722         interface_cleanup_state(iface);
 723         proto_init_interface(iface, iface->config);
 724         interface_claim_device(iface);
 725 }
 726
 727 static void
 728 interface_handle_config_change(struct interface *iface)
 729 {
 730         enum interface_config_state state = iface->config_state;
 731
 732         iface->config_state = IFC_NORMAL;
 733         switch(state) {
 734         case IFC_NORMAL:
 735                 break;
 736         case IFC_RELOAD:
 737                 interface_do_reload(iface);
 738                 break;
 739         case IFC_REMOVE:
 740                 interface_do_free(iface);
 741                 return;
 742         }
 743         if (iface->autostart)
 744                 interface_set_up(iface);
 745 }
 746
 747 static void
 748 interface_proto_event_cb(struct interface_proto_state *state, enum interface_proto_event ev)
 749 {
 750         struct interface *iface = state->iface;
 751
 752         switch (ev) {
 753         case IFPEV_UP:
 754                 if (iface->state != IFS_SETUP) {
 755                         if (iface->state == IFS_UP && iface->updated)
 756                                 interface_event(iface, IFEV_UPDATE);
 757                         return;
 758                 }
 759
 760                 if (!iface->l3_dev.dev)
 761                         interface_set_l3_dev(iface, iface->main_dev.dev);
 762
 763                 interface_ip_set_enabled(&iface->config_ip, true);
 764                 interface_ip_set_enabled(&iface->proto_ip, true);
 765                 system_flush_routes();
 766                 iface->state = IFS_UP;
 767                 iface->start_time = system_get_rtime();
 768                 interface_event(iface, IFEV_UP);
 769                 netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
 770                 break;
 771         case IFPEV_DOWN:
 772                 if (iface->state == IFS_DOWN)
 773                         return;
 774
 775                 netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
 776                 mark_interface_down(iface);
 777                 interface_write_resolv_conf(iface->jail);
 778                 if (iface->main_dev.dev && !(iface->config_state == IFC_NORMAL && iface->autostart && iface->available))
 779                         device_release(&iface->main_dev);
 780                 if (iface->l3_dev.dev)
 781                         device_remove_user(&iface->l3_dev);
 782                 interface_handle_config_change(iface);
 783                 return;
 784         case IFPEV_LINK_LOST:
 785                 if (iface->state != IFS_UP)
 786                         return;
 787
 788                 netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
 789                 mark_interface_down(iface);
 790                 iface->state = IFS_SETUP;
 791                 break;
 792         default:
 793                 return;
 794         }
 795
 796         interface_write_resolv_conf(iface->jail);
 797 }
 798
 799 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
 800 {
 801         if (iface->proto) {
 802                 iface->proto->free(iface->proto);
 803                 iface->proto = NULL;
 804         }
 805         iface->state = IFS_DOWN;
 806         iface->proto = state;
 807         if (!state)
 808                 return;
 809
 810         state->proto_event = interface_proto_event_cb;
 811         state->iface = iface;
 812 }
 813
 814 struct interface *
 815 interface_alloc(const char *name, struct blob_attr *config, bool dynamic)
 816 {
 817         struct interface *iface;
 818         struct blob_attr *tb[IFACE_ATTR_MAX];
 819         struct blob_attr *cur;
 820         const char *proto_name = NULL;
 821         char *iface_name;
 822         bool force_link = false;
 823
 824         iface = calloc_a(sizeof(*iface), &iface_name, strlen(name) + 1);
 825         iface->name = strcpy(iface_name, name);
 826         INIT_LIST_HEAD(&iface->errors);
 827         INIT_LIST_HEAD(&iface->users);
 828         INIT_LIST_HEAD(&iface->hotplug_list);
 829         INIT_LIST_HEAD(&iface->assignment_classes);
 830         interface_ip_init(iface);
 831         avl_init(&iface->data, avl_strcmp, false, NULL);
 832         iface->config_ip.enabled = false;
 833
 834         iface->main_dev.cb = interface_main_dev_cb;
 835         iface->l3_dev.cb = interface_l3_dev_cb;
 836         iface->ext_dev.cb = interface_ext_dev_cb;
 837
 838         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
 839                       blob_data(config), blob_len(config));
 840
 841         iface->zone = NULL;
 842         if ((cur = tb[IFACE_ATTR_ZONE]))
 843                 iface->zone = strdup(blobmsg_get_string(cur));
 844
 845         if ((cur = tb[IFACE_ATTR_PROTO]))
 846                 proto_name = blobmsg_data(cur);
 847
 848         proto_attach_interface(iface, proto_name);
 849         if (iface->proto_handler->flags & PROTO_FLAG_FORCE_LINK_DEFAULT)
 850                 force_link = true;
 851
 852         iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
 853         iface->force_link = blobmsg_get_bool_default(tb[IFACE_ATTR_FORCE_LINK], force_link);
 854         iface->dynamic = dynamic;
 855         iface->proto_ip.no_defaultroute =
 856                 !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
 857         iface->proto_ip.no_dns =
 858                 !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
 859
 860         if ((cur = tb[IFACE_ATTR_DNS]))
 861                 interface_add_dns_server_list(&iface->config_ip, cur);
 862
 863         if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
 864                 interface_add_dns_search_list(&iface->config_ip, cur);
 865
 866         if ((cur = tb[IFACE_ATTR_DNS_METRIC]))
 867                 iface->dns_metric = blobmsg_get_u32(cur);
 868
 869         if ((cur = tb[IFACE_ATTR_METRIC]))
 870                 iface->metric = blobmsg_get_u32(cur);
 871
 872         if ((cur = tb[IFACE_ATTR_IP6ASSIGN]))
 873                 iface->assignment_length = blobmsg_get_u32(cur);
 874
 875         /* defaults */
 876         iface->assignment_iface_id_selection = IFID_FIXED;
 877         iface->assignment_fixed_iface_id = in6addr_any;
 878         iface->assignment_fixed_iface_id.s6_addr[15] = 1;
 879
 880         if ((cur = tb[IFACE_ATTR_IP6IFACEID])) {
 881                 const char *ifaceid = blobmsg_data(cur);
 882                 if (!strcmp(ifaceid, "random")) {
 883                         iface->assignment_iface_id_selection = IFID_RANDOM;
 884                 }
 885                 else if (!strcmp(ifaceid, "eui64")) {
 886                         iface->assignment_iface_id_selection = IFID_EUI64;
 887                 }
 888                 else {
 889                         /* we expect an IPv6 address with network id zero here -> fixed iface id
 890                            if we cannot parse -> revert to iface id 1 */
 891                         if (inet_pton(AF_INET6,ifaceid,&iface->assignment_fixed_iface_id) != 1 ||
 892                                         iface->assignment_fixed_iface_id.s6_addr32[0] != 0 ||
 893                                         iface->assignment_fixed_iface_id.s6_addr32[1] != 0) {
 894                                 iface->assignment_fixed_iface_id = in6addr_any;
 895                                 iface->assignment_fixed_iface_id.s6_addr[15] = 1;
 896                                 netifd_log_message(L_WARNING, "Failed to parse ip6ifaceid for interface '%s', \
 897                                                         falling back to iface id 1.\n", iface->name);
 898                         }
 899                 }
 900         }
 901
 902         iface->assignment_hint = -1;
 903         if ((cur = tb[IFACE_ATTR_IP6HINT]))
 904                 iface->assignment_hint = strtol(blobmsg_get_string(cur), NULL, 16) &
 905                                 ~((1 << (64 - iface->assignment_length)) - 1);
 906
 907         if ((cur = tb[IFACE_ATTR_IP6CLASS]))
 908                 interface_add_assignment_classes(iface, cur);
 909
 910         if ((cur = tb[IFACE_ATTR_IP6WEIGHT]))
 911                 iface->assignment_weight = blobmsg_get_u32(cur);
 912
 913         if ((cur = tb[IFACE_ATTR_IP4TABLE])) {
 914                 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip4table))
 915                         D(INTERFACE, "Failed to resolve routing table: %s", (char *) blobmsg_data(cur));
 916         }
 917
 918         if ((cur = tb[IFACE_ATTR_IP6TABLE])) {
 919                 if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip6table))
 920                         D(INTERFACE, "Failed to resolve routing table: %s", (char *) blobmsg_data(cur));
 921         }
 922
 923         iface->proto_ip.no_delegation = !blobmsg_get_bool_default(tb[IFACE_ATTR_DELEGATE], true);
 924
 925         iface->config_autostart = iface->autostart;
 926         iface->jail = NULL;
 927
 928         if ((cur = tb[IFACE_ATTR_JAIL])) {
 929                 iface->jail = strdup(blobmsg_get_string(cur));
 930                 iface->autostart = false;
 931         }
 932
 933         iface->jail_device = NULL;
 934         if ((cur = tb[IFACE_ATTR_JAIL_DEVICE]))
 935                 iface->jail_device = strdup(blobmsg_get_string(cur));
 936         else if ((cur = tb[IFACE_ATTR_JAIL_IFNAME]))
 937                 iface->jail_device = strdup(blobmsg_get_string(cur));
 938
 939         iface->host_device = NULL;
 940         if ((cur = tb[IFACE_ATTR_HOST_DEVICE]))
 941                 iface->host_device = strdup(blobmsg_get_string(cur));
 942
 943         return iface;
 944 }
 945
 946 static bool __interface_add(struct interface *iface, struct blob_attr *config, bool alias)
 947 {
 948         struct blob_attr *tb[IFACE_ATTR_MAX];
 949         struct blob_attr *cur;
 950         char *name = NULL;
 951
 952         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
 953                       blob_data(config), blob_len(config));
 954
 955         if (alias) {
 956                 if ((cur = tb[IFACE_ATTR_INTERFACE]))
 957                         iface->parent_ifname = blobmsg_data(cur);
 958
 959                 if (!iface->parent_ifname)
 960                         return false;
 961         } else {
 962                 cur = tb[IFACE_ATTR_DEVICE];
 963                 if (!cur)
 964                         cur = tb[IFACE_ATTR_IFNAME];
 965                 if (cur)
 966                         iface->device = blobmsg_data(cur);
 967         }
 968
 969         if (iface->dynamic) {
 970                 name = strdup(iface->name);
 971
 972                 if (!name)
 973                         return false;
 974         }
 975
 976         iface->config = config;
 977         vlist_add(&interfaces, &iface->node, iface->name);
 978
 979         if (name) {
 980                 iface = vlist_find(&interfaces, name, iface, node);
 981                 free(name);
 982
 983                 /* Don't delete dynamic interface on reload */
 984                 if (iface)
 985                         iface->node.version = -1;
 986         }
 987
 988         return true;
 989 }
 990
 991 bool
 992 interface_add(struct interface *iface, struct blob_attr *config)
 993 {
 994         return __interface_add(iface, config, false);
 995 }
 996
 997 bool
 998 interface_add_alias(struct interface *iface, struct blob_attr *config)
 999 {
1000         if (iface->proto_handler->flags & PROTO_FLAG_NODEV)
1001                 return false;
1002
1003         return __interface_add(iface, config, true);
1004 }
1005
1006 void
1007 interface_set_l3_dev(struct interface *iface, struct device *dev)
1008 {
1009         bool enabled = iface->config_ip.enabled;
1010         bool claimed = iface->l3_dev.claimed;
1011
1012         if (iface->l3_dev.dev == dev)
1013                 return;
1014
1015         interface_ip_set_enabled(&iface->config_ip, false);
1016         interface_ip_set_enabled(&iface->proto_ip, false);
1017         interface_ip_flush(&iface->proto_ip);
1018         device_add_user(&iface->l3_dev, dev);
1019
1020         if (dev) {
1021                 if (claimed) {
1022                         if (device_claim(&iface->l3_dev) < 0)
1023                                 return;
1024                 }
1025                 interface_ip_set_enabled(&iface->config_ip, enabled);
1026                 interface_ip_set_enabled(&iface->proto_ip, enabled);
1027         }
1028 }
1029
1030 static void
1031 interface_set_main_dev(struct interface *iface, struct device *dev)
1032 {
1033         bool claimed = iface->l3_dev.claimed;
1034
1035         if (iface->main_dev.dev == dev)
1036                 return;
1037
1038         interface_set_available(iface, false);
1039         device_add_user(&iface->main_dev, dev);
1040         if (!dev) {
1041                 interface_set_link_state(iface, false);
1042                 return;
1043         }
1044
1045         if (claimed) {
1046                 if (device_claim(&iface->l3_dev) < 0)
1047                         return;
1048         }
1049
1050         if (!iface->l3_dev.dev)
1051                 interface_set_l3_dev(iface, dev);
1052 }
1053
1054 static int
1055 interface_remove_link(struct interface *iface, struct device *dev,
1056                       struct blob_attr *vlan)
1057 {
1058         struct device *mdev = iface->main_dev.dev;
1059
1060         if (mdev && mdev->hotplug_ops)
1061                 return mdev->hotplug_ops->del(mdev, dev, vlan);
1062
1063         if (dev == iface->ext_dev.dev)
1064                 device_remove_user(&iface->ext_dev);
1065
1066         if (!iface->main_dev.hotplug)
1067                 return UBUS_STATUS_INVALID_ARGUMENT;
1068
1069         if (dev != iface->main_dev.dev)
1070                 return UBUS_STATUS_INVALID_ARGUMENT;
1071
1072         interface_set_main_dev(iface, NULL);
1073         return 0;
1074 }
1075
1076 static int
1077 interface_add_link(struct interface *iface, struct device *dev,
1078                    struct blob_attr *vlan, bool link_ext)
1079 {
1080         struct device *mdev = iface->main_dev.dev;
1081
1082         if (mdev == dev)
1083                 return 0;
1084
1085         if (iface->main_dev.hotplug)
1086                 device_remove_user(&iface->main_dev);
1087
1088         if (mdev) {
1089                 if (mdev->hotplug_ops)
1090                         return mdev->hotplug_ops->add(mdev, dev, vlan);
1091                 else
1092                         return UBUS_STATUS_NOT_SUPPORTED;
1093         }
1094
1095         if (link_ext)
1096                 device_add_user(&iface->ext_dev, dev);
1097
1098         interface_set_main_dev(iface, dev);
1099         iface->main_dev.hotplug = true;
1100         return 0;
1101 }
1102
1103 int
1104 interface_handle_link(struct interface *iface, const char *name,
1105                       struct blob_attr *vlan, bool add, bool link_ext)
1106 {
1107         struct device *dev;
1108
1109         dev = device_get(name, add ? (link_ext ? 2 : 1) : 0);
1110         if (!dev)
1111                 return UBUS_STATUS_NOT_FOUND;
1112
1113         if (!add)
1114                 return interface_remove_link(iface, dev, vlan);
1115
1116         interface_set_device_config(iface, dev);
1117         if (!link_ext)
1118                 device_set_present(dev, true);
1119
1120         return interface_add_link(iface, dev, vlan, link_ext);
1121 }
1122
1123 void
1124 interface_set_up(struct interface *iface)
1125 {
1126         int ret;
1127         const char *error = NULL;
1128
1129         iface->autostart = true;
1130         wireless_check_network_enabled();
1131
1132         if (iface->state != IFS_DOWN)
1133                 return;
1134
1135         interface_clear_errors(iface);
1136         if (iface->available) {
1137                 if (iface->main_dev.dev) {
1138                         ret = device_claim(&iface->main_dev);
1139                         if (!ret)
1140                                 interface_check_state(iface);
1141                         else
1142                                 error = "DEVICE_CLAIM_FAILED";
1143                 } else {
1144                         ret = __interface_set_up(iface);
1145                         if (ret)
1146                                 error = "SETUP_FAILED";
1147                 }
1148         } else
1149                 error = "NO_DEVICE";
1150
1151         if (error)
1152                 interface_add_error(iface, "interface", error, NULL, 0);
1153 }
1154
1155 void
1156 interface_set_down(struct interface *iface)
1157 {
1158         if (!iface) {
1159                 vlist_for_each_element(&interfaces, iface, node)
1160                         __interface_set_down(iface, false);
1161         } else {
1162                 iface->autostart = false;
1163                 wireless_check_network_enabled();
1164                 __interface_set_down(iface, false);
1165         }
1166 }
1167
1168 int
1169 interface_renew(struct interface *iface)
1170 {
1171         if (iface->state == IFS_TEARDOWN || iface->state == IFS_DOWN)
1172                 return -1;
1173
1174         return interface_proto_event(iface->proto, PROTO_CMD_RENEW, false);
1175 }
1176
1177 void
1178 interface_start_pending(void)
1179 {
1180         struct interface *iface;
1181
1182         vlist_for_each_element(&interfaces, iface, node) {
1183                 if (iface->autostart)
1184                         interface_set_up(iface);
1185         }
1186 }
1187
1188 void
1189 interface_start_jail(int netns_fd, const char *jail)
1190 {
1191         struct interface *iface;
1192
1193         vlist_for_each_element(&interfaces, iface, node) {
1194                 if (!iface->jail || strcmp(iface->jail, jail))
1195                         continue;
1196
1197                 system_link_netns_move(iface->main_dev.dev, netns_fd, iface->jail_device);
1198         }
1199 }
1200
1201 void
1202 interface_stop_jail(int netns_fd)
1203 {
1204         struct interface *iface;
1205         char *orig_ifname;
1206
1207         vlist_for_each_element(&interfaces, iface, node) {
1208                 orig_ifname = iface->host_device;
1209                 interface_set_down(iface);
1210                 system_link_netns_move(iface->main_dev.dev, netns_fd, orig_ifname);
1211         }
1212 }
1213
1214 static void
1215 set_config_state(struct interface *iface, enum interface_config_state s)
1216 {
1217         __set_config_state(iface, s);
1218         if (iface->state == IFS_DOWN)
1219                 interface_handle_config_change(iface);
1220         else
1221                 __interface_set_down(iface, false);
1222 }
1223
1224 void
1225 interface_update_start(struct interface *iface, const bool keep_old)
1226 {
1227         iface->updated = 0;
1228
1229         if (!keep_old)
1230                 interface_ip_update_start(&iface->proto_ip);
1231 }
1232
1233 void
1234 interface_update_complete(struct interface *iface)
1235 {
1236         interface_ip_update_complete(&iface->proto_ip);
1237 }
1238
1239 static void
1240 interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
1241 {
1242         vlist_simple_replace(&new->dns_servers, &old->dns_servers);
1243         vlist_simple_replace(&new->dns_search, &old->dns_search);
1244 }
1245
1246 static bool
1247 interface_device_config_changed(struct interface *if_old, struct interface *if_new)
1248 {
1249         struct blob_attr *ntb[__DEV_ATTR_MAX];
1250         struct blob_attr *otb[__DEV_ATTR_MAX];
1251         struct device *dev = if_old->main_dev.dev;
1252         unsigned long diff[2] = {};
1253
1254         BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
1255
1256         if (!dev)
1257                 return false;
1258
1259         if (if_old->device_config != if_new->device_config)
1260                 return true;
1261
1262         if (!if_new->device_config)
1263                 return false;
1264
1265         blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb,
1266                 blob_data(if_old->config), blob_len(if_old->config));
1267
1268         blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, ntb,
1269                 blob_data(if_new->config), blob_len(if_new->config));
1270
1271         uci_blob_diff(ntb, otb, &device_attr_list, diff);
1272
1273         return diff[0] | diff[1];
1274 }
1275
1276 static void
1277 interface_change_config(struct interface *if_old, struct interface *if_new)
1278 {
1279         struct blob_attr *old_config = if_old->config;
1280         bool reload = false, reload_ip = false, update_prefix_delegation = false;
1281
1282 #define FIELD_CHANGED_STR(field)                                        \
1283                 ((!!if_old->field != !!if_new->field) ||                \
1284                  (if_old->field &&                                      \
1285                   strcmp(if_old->field, if_new->field) != 0))
1286
1287         if (FIELD_CHANGED_STR(parent_ifname)) {
1288                 if (if_old->parent_iface.iface)
1289                         interface_remove_user(&if_old->parent_iface);
1290                 reload = true;
1291         }
1292
1293         if (!reload && interface_device_config_changed(if_old, if_new))
1294                 reload = true;
1295
1296         if (FIELD_CHANGED_STR(device) ||
1297             if_old->proto_handler != if_new->proto_handler)
1298                 reload = true;
1299
1300         if (!if_old->proto_handler->config_params)
1301                 D(INTERFACE, "No config parameters for interface '%s'",
1302                   if_old->name);
1303         else if (!uci_blob_check_equal(if_old->config, if_new->config,
1304                                        if_old->proto_handler->config_params))
1305                 reload = true;
1306
1307 #define UPDATE(field, __var) ({                                         \
1308                 bool __changed = (if_old->field != if_new->field);      \
1309                 if_old->field = if_new->field;                          \
1310                 __var |= __changed;                                     \
1311         })
1312
1313         if_old->config = if_new->config;
1314         if (if_old->config_autostart != if_new->config_autostart) {
1315                 if (if_old->config_autostart)
1316                         reload = true;
1317
1318                 if_old->autostart = if_new->config_autostart;
1319         }
1320
1321         if_old->device_config = if_new->device_config;
1322         if_old->config_autostart = if_new->config_autostart;
1323         if (if_old->jail)
1324                 free(if_old->jail);
1325
1326         if_old->jail = if_new->jail;
1327         if (if_old->jail)
1328                 if_old->autostart = false;
1329
1330         if (if_old->jail_device)
1331                 free(if_old->jail_device);
1332
1333         if_old->jail_device = if_new->jail_device;
1334
1335         if (if_old->host_device)
1336                 free(if_old->host_device);
1337
1338         if_old->host_device = if_new->host_device;
1339
1340         if_old->device = if_new->device;
1341         if_old->parent_ifname = if_new->parent_ifname;
1342         if_old->dynamic = if_new->dynamic;
1343         if_old->proto_handler = if_new->proto_handler;
1344         if_old->force_link = if_new->force_link;
1345         if_old->dns_metric = if_new->dns_metric;
1346
1347         if (if_old->proto_ip.no_delegation != if_new->proto_ip.no_delegation) {
1348                 if_old->proto_ip.no_delegation = if_new->proto_ip.no_delegation;
1349                 update_prefix_delegation = true;
1350         }
1351
1352         if_old->proto_ip.no_dns = if_new->proto_ip.no_dns;
1353         interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
1354
1355         UPDATE(metric, reload_ip);
1356         UPDATE(proto_ip.no_defaultroute, reload_ip);
1357         UPDATE(ip4table, reload_ip);
1358         UPDATE(ip6table, reload_ip);
1359         interface_merge_assignment_data(if_old, if_new);
1360
1361 #undef UPDATE
1362
1363         if (reload) {
1364                 D(INTERFACE, "Reload interface '%s' because of config changes",
1365                   if_old->name);
1366                 interface_clear_errors(if_old);
1367                 set_config_state(if_old, IFC_RELOAD);
1368                 goto out;
1369         }
1370
1371         if (reload_ip) {
1372                 bool config_ip_enabled = if_old->config_ip.enabled;
1373                 bool proto_ip_enabled = if_old->proto_ip.enabled;
1374
1375                 interface_ip_set_enabled(&if_old->config_ip, false);
1376                 interface_ip_set_enabled(&if_old->proto_ip, false);
1377                 interface_ip_set_enabled(&if_old->proto_ip, proto_ip_enabled);
1378                 interface_ip_set_enabled(&if_old->config_ip, config_ip_enabled);
1379         }
1380
1381         if (update_prefix_delegation)
1382                 interface_update_prefix_delegation(&if_old->proto_ip);
1383
1384         interface_write_resolv_conf(if_old->jail);
1385         if (if_old->main_dev.dev)
1386                 interface_check_state(if_old);
1387
1388 out:
1389         if_new->config = NULL;
1390         interface_cleanup(if_new);
1391         free(old_config);
1392         free(if_new);
1393 }
1394
1395 static void
1396 interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
1397                  struct vlist_node *node_old)
1398 {
1399         struct interface *if_old = container_of(node_old, struct interface, node);
1400         struct interface *if_new = container_of(node_new, struct interface, node);
1401
1402         if (node_old && node_new) {
1403                 D(INTERFACE, "Update interface '%s'", if_new->name);
1404                 interface_change_config(if_old, if_new);
1405         } else if (node_old) {
1406                 D(INTERFACE, "Remove interface '%s'", if_old->name);
1407                 set_config_state(if_old, IFC_REMOVE);
1408         } else if (node_new) {
1409                 D(INTERFACE, "Create interface '%s'", if_new->name);
1410                 interface_event(if_new, IFEV_CREATE);
1411                 proto_init_interface(if_new, if_new->config);
1412                 interface_claim_device(if_new);
1413                 netifd_ubus_add_interface(if_new);
1414         }
1415 }
1416
1417
1418 static void __init
1419 interface_init_list(void)
1420 {
1421         vlist_init(&interfaces, avl_strcmp, interface_update);
1422         interfaces.keep_old = true;
1423         interfaces.no_delete = true;
1424 }