src/element.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2008  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <errno.h>
  27
  28 #include <glib.h>
  29 #include <gdbus.h>
  30
  31 #include "connman.h"
  32
  33 static DBusConnection *connection;
  34
  35 static GStaticRWLock element_lock = G_STATIC_RW_LOCK_INIT;
  36 static GNode *element_root = NULL;
  37
  38 static GSList *driver_list = NULL;
  39
  40 static GThreadPool *thread_register = NULL;
  41 static GThreadPool *thread_unregister = NULL;
  42
  43 static const char *type2string(enum connman_element_type type)
  44 {
  45         switch (type) {
  46         case CONNMAN_ELEMENT_TYPE_UNKNOWN:
  47                 return "unknown";
  48         case CONNMAN_ELEMENT_TYPE_ROOT:
  49                 return "root";
  50         case CONNMAN_ELEMENT_TYPE_DEVICE:
  51                 return "device";
  52         case CONNMAN_ELEMENT_TYPE_NETWORK:
  53                 return "network";
  54         case CONNMAN_ELEMENT_TYPE_IPV4:
  55                 return "ipv4";
  56         case CONNMAN_ELEMENT_TYPE_IPV6:
  57                 return "ipv6";
  58         case CONNMAN_ELEMENT_TYPE_DHCP:
  59                 return "dhcp";
  60         case CONNMAN_ELEMENT_TYPE_BOOTP:
  61                 return "bootp";
  62         case CONNMAN_ELEMENT_TYPE_ZEROCONF:
  63                 return "zeroconf";
  64         case CONNMAN_ELEMENT_TYPE_RESOLVER:
  65                 return "resolver";
  66         case CONNMAN_ELEMENT_TYPE_INTERNET:
  67                 return "internet";
  68         }
  69
  70         return NULL;
  71 }
  72
  73 static const char *subtype2string(enum connman_element_subtype type)
  74 {
  75         switch (type) {
  76         case CONNMAN_ELEMENT_SUBTYPE_UNKNOWN:
  77                 return "unknown";
  78         case CONNMAN_ELEMENT_SUBTYPE_ETHERNET:
  79                 return "ethernet";
  80         case CONNMAN_ELEMENT_SUBTYPE_WIFI:
  81                 return "wifi";
  82         case CONNMAN_ELEMENT_SUBTYPE_WIMAX:
  83                 return "wimax";
  84         case CONNMAN_ELEMENT_SUBTYPE_MODEM:
  85                 return "modem";
  86         case CONNMAN_ELEMENT_SUBTYPE_BLUETOOTH:
  87                 return "bluetooth";
  88         }
  89
  90         return NULL;
  91 }
  92
  93 static void append_entry(DBusMessageIter *dict,
  94                                 const char *key, int type, void *val)
  95 {
  96         DBusMessageIter entry, value;
  97         const char *signature;
  98
  99         dbus_message_iter_open_container(dict, DBUS_TYPE_DICT_ENTRY,
 100                                                                 NULL, &entry);
 101
 102         dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &key);
 103
 104         switch (type) {
 105         case DBUS_TYPE_STRING:
 106                 signature = DBUS_TYPE_STRING_AS_STRING;
 107                 break;
 108         case DBUS_TYPE_UINT16:
 109                 signature = DBUS_TYPE_UINT16_AS_STRING;
 110                 break;
 111         case DBUS_TYPE_UINT32:
 112                 signature = DBUS_TYPE_UINT32_AS_STRING;
 113                 break;
 114         case DBUS_TYPE_OBJECT_PATH:
 115                 signature = DBUS_TYPE_OBJECT_PATH_AS_STRING;
 116                 break;
 117         default:
 118                 signature = DBUS_TYPE_VARIANT_AS_STRING;
 119                 break;
 120         }
 121
 122         dbus_message_iter_open_container(&entry, DBUS_TYPE_VARIANT,
 123                                                         signature, &value);
 124         dbus_message_iter_append_basic(&value, type, val);
 125         dbus_message_iter_close_container(&entry, &value);
 126
 127         dbus_message_iter_close_container(dict, &entry);
 128 }
 129
 130 static void append_property(DBusMessageIter *dict,
 131                                 struct connman_property *property)
 132 {
 133         if (property->flags & CONNMAN_PROPERTY_FLAG_STATIC) {
 134                 append_entry(dict, property->name, property->type,
 135                                                         &property->value);
 136                 return;
 137         }
 138 }
 139
 140 static DBusMessage *get_properties(DBusConnection *conn,
 141                                         DBusMessage *msg, void *data)
 142 {
 143         struct connman_element *element = data;
 144         GSList *list;
 145         DBusMessage *reply;
 146         DBusMessageIter array, dict;
 147         const char *str;
 148
 149         DBG("conn %p", conn);
 150
 151         reply = dbus_message_new_method_return(msg);
 152         if (reply == NULL)
 153                 return NULL;
 154
 155         dbus_message_iter_init_append(reply, &array);
 156
 157         dbus_message_iter_open_container(&array, DBUS_TYPE_ARRAY,
 158                         DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
 159                         DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
 160                         DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
 161
 162         if (element->parent != NULL)
 163                 append_entry(&dict, "Parent",
 164                                 DBUS_TYPE_OBJECT_PATH, &element->parent->path);
 165
 166         str = type2string(element->type);
 167         if (str != NULL)
 168                 append_entry(&dict, "Type", DBUS_TYPE_STRING, &str);
 169         str = subtype2string(element->subtype);
 170         if (str != NULL)
 171                 append_entry(&dict, "Subtype", DBUS_TYPE_STRING, &str);
 172
 173         if (element->priority > 0)
 174                 append_entry(&dict, "Priority",
 175                                 DBUS_TYPE_UINT16, &element->priority);
 176
 177         if (element->network.identifier != NULL)
 178                 append_entry(&dict, "Identifier",
 179                                 DBUS_TYPE_STRING, &element->network.identifier);
 180
 181         if (element->ipv4.address != NULL)
 182                 append_entry(&dict, "IPv4.Address",
 183                                 DBUS_TYPE_STRING, &element->ipv4.address);
 184         if (element->ipv4.netmask != NULL)
 185                 append_entry(&dict, "IPv4.Netmask",
 186                                 DBUS_TYPE_STRING, &element->ipv4.netmask);
 187         if (element->ipv4.gateway != NULL)
 188                 append_entry(&dict, "IPv4.Gateway",
 189                                 DBUS_TYPE_STRING, &element->ipv4.gateway);
 190
 191         for (list = element->properties; list; list = list->next) {
 192                 struct connman_property *property = list->data;
 193
 194                 append_property(&dict, property);
 195         }
 196
 197         dbus_message_iter_close_container(&array, &dict);
 198
 199         return reply;
 200 }
 201
 202 static GDBusMethodTable element_methods[] = {
 203         { "GetProperties", "", "a{sv}", get_properties },
 204         { },
 205 };
 206
 207 struct append_filter {
 208         enum connman_element_type type;
 209         DBusMessageIter *iter;
 210 };
 211
 212 static gboolean append_path(GNode *node, gpointer data)
 213 {
 214         struct connman_element *element = node->data;
 215         struct append_filter *filter = data;
 216
 217         DBG("element %p name %s", element, element->name);
 218
 219         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 220                 return FALSE;
 221
 222         if (filter->type != CONNMAN_ELEMENT_TYPE_UNKNOWN &&
 223                                         filter->type != element->type)
 224                 return FALSE;
 225
 226         dbus_message_iter_append_basic(filter->iter,
 227                                 DBUS_TYPE_OBJECT_PATH, &element->path);
 228
 229         return FALSE;
 230 }
 231
 232 void __connman_element_list(enum connman_element_type type,
 233                                                 DBusMessageIter *iter)
 234 {
 235         struct append_filter filter = { type, iter };
 236
 237         DBG("");
 238
 239         g_static_rw_lock_reader_lock(&element_lock);
 240         g_node_traverse(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 241                                                         append_path, &filter);
 242         g_static_rw_lock_reader_unlock(&element_lock);
 243 }
 244
 245 static gint compare_priority(gconstpointer a, gconstpointer b)
 246 {
 247         const struct connman_driver *driver1 = a;
 248         const struct connman_driver *driver2 = b;
 249
 250         return driver2->priority - driver1->priority;
 251 }
 252
 253 static gboolean match_driver(struct connman_element *element,
 254                                         struct connman_driver *driver)
 255 {
 256         if (element->type != driver->type &&
 257                         driver->type != CONNMAN_ELEMENT_TYPE_UNKNOWN)
 258                 return FALSE;
 259
 260         if (element->subtype == driver->subtype ||
 261                         driver->subtype == CONNMAN_ELEMENT_SUBTYPE_UNKNOWN)
 262                 return TRUE;
 263
 264         return FALSE;
 265 }
 266
 267 static gboolean probe_driver(GNode *node, gpointer data)
 268 {
 269         struct connman_element *element = node->data;
 270         struct connman_driver *driver = data;
 271
 272         DBG("element %p name %s", element, element->name);
 273
 274         if (!element->driver && match_driver(element, driver) == TRUE) {
 275                 if (driver->probe(element) < 0)
 276                         return FALSE;
 277
 278                 connman_element_lock(element);
 279                 element->driver = driver;
 280                 connman_element_unlock(element);
 281         }
 282
 283         return FALSE;
 284 }
 285
 286 int connman_driver_register(struct connman_driver *driver)
 287 {
 288         DBG("driver %p name %s", driver, driver->name);
 289
 290         if (driver->type == CONNMAN_ELEMENT_TYPE_ROOT)
 291                 return -EINVAL;
 292
 293         if (!driver->probe)
 294                 return -EINVAL;
 295
 296         g_static_rw_lock_writer_lock(&element_lock);
 297
 298         driver_list = g_slist_insert_sorted(driver_list, driver,
 299                                                         compare_priority);
 300
 301         if (element_root != NULL)
 302                 g_node_traverse(element_root, G_PRE_ORDER,
 303                                 G_TRAVERSE_ALL, -1, probe_driver, driver);
 304
 305         g_static_rw_lock_writer_unlock(&element_lock);
 306
 307         return 0;
 308 }
 309
 310 static gboolean remove_driver(GNode *node, gpointer data)
 311 {
 312         struct connman_element *element = node->data;
 313         struct connman_driver *driver = data;
 314
 315         DBG("element %p name %s", element, element->name);
 316
 317         if (element->driver == driver) {
 318                 if (driver->remove)
 319                         driver->remove(element);
 320
 321                 connman_element_lock(element);
 322                 element->driver = NULL;
 323                 connman_element_unlock(element);
 324         }
 325
 326         return FALSE;
 327 }
 328
 329 void connman_driver_unregister(struct connman_driver *driver)
 330 {
 331         DBG("driver %p name %s", driver, driver->name);
 332
 333         g_static_rw_lock_writer_lock(&element_lock);
 334
 335         driver_list = g_slist_remove(driver_list, driver);
 336
 337         if (element_root != NULL)
 338                 g_node_traverse(element_root, G_POST_ORDER,
 339                                 G_TRAVERSE_ALL, -1, remove_driver, driver);
 340
 341         g_static_rw_lock_writer_unlock(&element_lock);
 342 }
 343
 344 struct connman_element *connman_element_create(void)
 345 {
 346         struct connman_element *element;
 347
 348         element = g_new0(struct connman_element, 1);
 349
 350         DBG("element %p", element);
 351
 352         element->refcount = 1;
 353
 354         g_static_mutex_init(&element->mutex);
 355
 356         element->type    = CONNMAN_ELEMENT_TYPE_UNKNOWN;
 357         element->subtype = CONNMAN_ELEMENT_SUBTYPE_UNKNOWN;
 358         element->state   = CONNMAN_ELEMENT_STATE_CLOSED;
 359
 360         element->netdev.index = -1;
 361
 362         return element;
 363 }
 364
 365 struct connman_element *connman_element_ref(struct connman_element *element)
 366 {
 367         DBG("element %p name %s refcount %d", element, element->name,
 368                                 g_atomic_int_get(&element->refcount) + 1);
 369
 370         g_atomic_int_inc(&element->refcount);
 371
 372         return element;
 373 }
 374
 375 void connman_element_unref(struct connman_element *element)
 376 {
 377         DBG("element %p name %s refcount %d", element, element->name,
 378                                 g_atomic_int_get(&element->refcount) - 1);
 379
 380         if (g_atomic_int_dec_and_test(&element->refcount) == TRUE) {
 381                 GSList *list;
 382
 383                 for (list = element->properties; list; list = list->next) {
 384                         struct connman_property *property = list->data;
 385                         if ((property->flags & CONNMAN_PROPERTY_FLAG_STATIC) &&
 386                                         property->type == DBUS_TYPE_STRING)
 387                                 g_free(property->value);
 388                         g_free(property);
 389                         list->data = NULL;
 390                 }
 391                 g_slist_free(element->properties);
 392
 393                 g_free(element->ipv4.address);
 394                 g_free(element->ipv4.netmask);
 395                 g_free(element->ipv4.gateway);
 396                 g_free(element->ipv4.network);
 397                 g_free(element->ipv4.broadcast);
 398                 g_free(element->ipv4.nameserver);
 399                 g_free(element->network.identifier);
 400                 g_free(element->netdev.name);
 401                 g_free(element->path);
 402                 g_free(element->name);
 403                 g_free(element);
 404         }
 405 }
 406
 407 int connman_element_add_static_property(struct connman_element *element,
 408                                 const char *name, int type, const void *value)
 409 {
 410         struct connman_property *property;
 411
 412         DBG("element %p name %s", element, element->name);
 413
 414         if (type != DBUS_TYPE_STRING)
 415                 return -EINVAL;
 416
 417         property = g_try_new0(struct connman_property, 1);
 418         if (property == NULL)
 419                 return -ENOMEM;
 420
 421         property->flags = CONNMAN_PROPERTY_FLAG_STATIC;
 422
 423         property->name = g_strdup(name);
 424         property->type = type;
 425
 426         DBG("name %s type %d value %p", name, type, value);
 427
 428         switch (type) {
 429         case DBUS_TYPE_STRING:
 430                 property->value = g_strdup(*((const char **) value));
 431                 break;
 432         }
 433
 434         connman_element_lock(element);
 435         element->properties = g_slist_append(element->properties, property);
 436         connman_element_unlock(element);
 437
 438         return 0;
 439 }
 440
 441 int connman_element_set_property(struct connman_element *element,
 442                         enum connman_property_type type, const void *value)
 443 {
 444         switch (type) {
 445         case CONNMAN_PROPERTY_TYPE_INVALID:
 446                 return -EINVAL;
 447         case CONNMAN_PROPERTY_TYPE_IPV4_ADDRESS:
 448                 connman_element_lock(element);
 449                 g_free(element->ipv4.address);
 450                 element->ipv4.address = g_strdup(*((const char **) value));
 451                 connman_element_unlock(element);
 452                 break;
 453         case CONNMAN_PROPERTY_TYPE_IPV4_NETMASK:
 454                 connman_element_lock(element);
 455                 g_free(element->ipv4.netmask);
 456                 element->ipv4.netmask = g_strdup(*((const char **) value));
 457                 connman_element_unlock(element);
 458                 break;
 459         case CONNMAN_PROPERTY_TYPE_IPV4_GATEWAY:
 460                 connman_element_lock(element);
 461                 g_free(element->ipv4.gateway);
 462                 element->ipv4.gateway = g_strdup(*((const char **) value));
 463                 connman_element_unlock(element);
 464                 break;
 465         case CONNMAN_PROPERTY_TYPE_IPV4_NAMESERVER:
 466                 connman_element_lock(element);
 467                 g_free(element->ipv4.nameserver);
 468                 element->ipv4.nameserver = g_strdup(*((const char **) value));
 469                 connman_element_unlock(element);
 470                 break;
 471         }
 472
 473         g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 474                                 CONNMAN_MANAGER_INTERFACE, "ElementUpdated",
 475                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 476                                                         DBUS_TYPE_INVALID);
 477
 478         return 0;
 479 }
 480
 481 int connman_element_get_value(struct connman_element *element,
 482                                 enum connman_property_type type, void *value)
 483 {
 484         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 485                 return -EINVAL;
 486
 487         switch (type) {
 488         case CONNMAN_PROPERTY_TYPE_INVALID:
 489                 return -EINVAL;
 490         case CONNMAN_PROPERTY_TYPE_IPV4_ADDRESS:
 491                 if (element->ipv4.address == NULL)
 492                         return connman_element_get_value(element->parent,
 493                                                                 type, value);
 494                 connman_element_lock(element);
 495                 *((char **) value) = element->ipv4.address;
 496                 connman_element_unlock(element);
 497                 break;
 498         case CONNMAN_PROPERTY_TYPE_IPV4_NETMASK:
 499                 if (element->ipv4.netmask == NULL)
 500                         return connman_element_get_value(element->parent,
 501                                                                 type, value);
 502                 connman_element_lock(element);
 503                 *((char **) value) = element->ipv4.netmask;
 504                 connman_element_unlock(element);
 505                 break;
 506         case CONNMAN_PROPERTY_TYPE_IPV4_GATEWAY:
 507                 if (element->ipv4.gateway == NULL)
 508                         return connman_element_get_value(element->parent,
 509                                                                 type, value);
 510                 connman_element_lock(element);
 511                 *((char **) value) = element->ipv4.gateway;
 512                 connman_element_unlock(element);
 513                 break;
 514         case CONNMAN_PROPERTY_TYPE_IPV4_NAMESERVER:
 515                 if (element->ipv4.nameserver == NULL)
 516                         return connman_element_get_value(element->parent,
 517                                                                 type, value);
 518                 connman_element_lock(element);
 519                 *((char **) value) = element->ipv4.nameserver;
 520                 connman_element_unlock(element);
 521                 break;
 522         }
 523
 524         return 0;
 525 }
 526
 527 int connman_element_register(struct connman_element *element,
 528                                         struct connman_element *parent)
 529 {
 530         DBG("element %p name %s parent %p", element, element->name, parent);
 531
 532         if (connman_element_ref(element) == NULL)
 533                 return -EINVAL;
 534
 535         connman_element_lock(element);
 536
 537         __connman_element_load(element);
 538
 539         if (element->name == NULL) {
 540                 switch (element->type) {
 541                 case CONNMAN_ELEMENT_TYPE_IPV4:
 542                         element->name = g_strdup("ipv4");
 543                         break;
 544                 case CONNMAN_ELEMENT_TYPE_IPV6:
 545                         element->name = g_strdup("ipv6");
 546                         break;
 547                 case CONNMAN_ELEMENT_TYPE_DHCP:
 548                         element->name = g_strdup("dhcp");
 549                         break;
 550                 case CONNMAN_ELEMENT_TYPE_BOOTP:
 551                         element->name = g_strdup("bootp");
 552                         break;
 553                 case CONNMAN_ELEMENT_TYPE_ZEROCONF:
 554                         element->name = g_strdup("zeroconf");
 555                         break;
 556                 case CONNMAN_ELEMENT_TYPE_RESOLVER:
 557                         element->name = g_strdup("resolver");
 558                         break;
 559                 default:
 560                         break;
 561                 }
 562         }
 563
 564         element->parent = parent;
 565
 566         connman_element_unlock(element);
 567
 568         if (thread_register != NULL)
 569                 g_thread_pool_push(thread_register, element, NULL);
 570
 571         return 0;
 572 }
 573
 574 void connman_element_unregister(struct connman_element *element)
 575 {
 576         DBG("element %p name %s", element, element->name);
 577
 578         if (thread_unregister != NULL)
 579                 g_thread_pool_push(thread_unregister, element, NULL);
 580 }
 581
 582 void connman_element_update(struct connman_element *element)
 583 {
 584         DBG("element %p name %s", element, element->name);
 585
 586         g_static_rw_lock_reader_lock(&element_lock);
 587
 588         if (element->driver && element->driver->update)
 589                 element->driver->update(element);
 590
 591         g_static_rw_lock_reader_unlock(&element_lock);
 592
 593         g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 594                                 CONNMAN_MANAGER_INTERFACE, "ElementUpdated",
 595                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 596                                                         DBUS_TYPE_INVALID);
 597 }
 598
 599 static void register_element(gpointer data, gpointer user_data)
 600 {
 601         struct connman_element *element = data;
 602         const gchar *basepath;
 603         GSList *list;
 604         GNode *node;
 605
 606         g_static_rw_lock_writer_lock(&element_lock);
 607
 608         connman_element_lock(element);
 609
 610         if (element->parent) {
 611                 node = g_node_find(element_root, G_PRE_ORDER,
 612                                         G_TRAVERSE_ALL, element->parent);
 613                 basepath = element->parent->path;
 614
 615                 if (element->subtype == CONNMAN_ELEMENT_SUBTYPE_UNKNOWN)
 616                         element->subtype = element->parent->subtype;
 617         } else {
 618                 node = element_root;
 619                 basepath = "";
 620         }
 621
 622         element->path = g_strdup_printf("%s/%s", basepath, element->name);
 623
 624         connman_element_unlock(element);
 625
 626         DBG("element %p path %s", element, element->path);
 627
 628         g_node_append_data(node, element);
 629
 630         g_static_rw_lock_writer_unlock(&element_lock);
 631
 632         __connman_element_store(element);
 633
 634         g_dbus_register_interface(connection, element->path,
 635                                         CONNMAN_ELEMENT_INTERFACE,
 636                                         element_methods, NULL, NULL,
 637                                                         element, NULL);
 638
 639         g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 640                                 CONNMAN_MANAGER_INTERFACE, "ElementAdded",
 641                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 642                                                         DBUS_TYPE_INVALID);
 643
 644         if (element->type == CONNMAN_ELEMENT_TYPE_DEVICE)
 645                 g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 646                                 CONNMAN_MANAGER_INTERFACE, "DeviceAdded",
 647                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 648                                                         DBUS_TYPE_INVALID);
 649
 650         g_static_rw_lock_writer_lock(&element_lock);
 651
 652         for (list = driver_list; list; list = list->next) {
 653                 struct connman_driver *driver = list->data;
 654
 655                 if (match_driver(element, driver) == FALSE)
 656                         continue;
 657
 658                 DBG("driver %p name %s", driver, driver->name);
 659
 660                 if (driver->probe(element) < 0)
 661                         continue;
 662
 663                 connman_element_lock(element);
 664                 element->driver = driver;
 665                 connman_element_unlock(element);
 666         }
 667
 668         g_static_rw_lock_writer_unlock(&element_lock);
 669 }
 670
 671 static void unregister_element(gpointer data, gpointer user_data)
 672 {
 673         struct connman_element *element = data;
 674         GNode *node;
 675
 676         DBG("element %p name %s", element, element->name);
 677
 678         g_static_rw_lock_writer_lock(&element_lock);
 679
 680         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
 681
 682         if (element->driver) {
 683                 if (element->driver->remove)
 684                         element->driver->remove(element);
 685
 686                 connman_element_lock(element);
 687                 element->driver = NULL;
 688                 connman_element_unlock(element);
 689         }
 690
 691         if (node != NULL) {
 692                 g_node_unlink(node);
 693                 g_node_destroy(node);
 694         }
 695
 696         g_static_rw_lock_writer_unlock(&element_lock);
 697
 698         if (element->type == CONNMAN_ELEMENT_TYPE_DEVICE)
 699                 g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 700                                 CONNMAN_MANAGER_INTERFACE, "DeviceRemoved",
 701                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 702                                                         DBUS_TYPE_INVALID);
 703
 704         g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 705                                 CONNMAN_MANAGER_INTERFACE, "ElementRemoved",
 706                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 707                                                         DBUS_TYPE_INVALID);
 708
 709         g_dbus_unregister_interface(connection, element->path,
 710                                                 CONNMAN_ELEMENT_INTERFACE);
 711
 712         connman_element_unref(element);
 713 }
 714
 715 int __connman_element_init(DBusConnection *conn)
 716 {
 717         struct connman_element *element;
 718
 719         DBG("conn %p", conn);
 720
 721         connection = dbus_connection_ref(conn);
 722         if (connection == NULL)
 723                 return -EIO;
 724
 725         g_static_rw_lock_writer_lock(&element_lock);
 726
 727         element = connman_element_create();
 728
 729         element->name = g_strdup("root");
 730         element->path = g_strdup("/");
 731         element->type = CONNMAN_ELEMENT_TYPE_ROOT;
 732
 733         element_root = g_node_new(element);
 734
 735         g_static_rw_lock_writer_unlock(&element_lock);
 736
 737         thread_register = g_thread_pool_new(register_element,
 738                                                         NULL, 1, FALSE, NULL);
 739         thread_unregister = g_thread_pool_new(unregister_element,
 740                                                         NULL, 1, FALSE, NULL);
 741
 742         return 0;
 743 }
 744
 745 static gboolean free_driver(GNode *node, gpointer data)
 746 {
 747         struct connman_element *element = node->data;
 748
 749         DBG("element %p name %s", element, element->name);
 750
 751         if (element->driver) {
 752                 if (element->driver->remove)
 753                         element->driver->remove(element);
 754
 755                 connman_element_lock(element);
 756                 element->driver = NULL;
 757                 connman_element_unlock(element);
 758         }
 759
 760         return FALSE;
 761 }
 762
 763 static gboolean free_node(GNode *node, gpointer data)
 764 {
 765         struct connman_element *element = node->data;
 766
 767         DBG("element %p name %s", element, element->name);
 768
 769         if (g_node_depth(node) > 1)
 770                 g_thread_pool_push(thread_unregister, element, NULL);
 771
 772         return FALSE;
 773 }
 774
 775 void __connman_element_cleanup(void)
 776 {
 777         DBG("");
 778
 779         g_thread_pool_free(thread_register, TRUE, TRUE);
 780         thread_register = NULL;
 781
 782         g_static_rw_lock_writer_lock(&element_lock);
 783         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
 784                                                         free_driver, NULL);
 785         g_static_rw_lock_writer_unlock(&element_lock);
 786
 787         g_static_rw_lock_writer_lock(&element_lock);
 788         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
 789                                                         free_node, NULL);
 790         g_static_rw_lock_writer_unlock(&element_lock);
 791
 792         g_thread_pool_free(thread_unregister, FALSE, TRUE);
 793         thread_unregister = NULL;
 794
 795         g_static_rw_lock_writer_lock(&element_lock);
 796         g_node_destroy(element_root);
 797         element_root = NULL;
 798         g_static_rw_lock_writer_unlock(&element_lock);
 799
 800         dbus_connection_unref(connection);
 801 }