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