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_BOOLEAN:
 106                 signature = DBUS_TYPE_BOOLEAN_AS_STRING;
 107                 break;
 108         case DBUS_TYPE_STRING:
 109                 signature = DBUS_TYPE_STRING_AS_STRING;
 110                 break;
 111         case DBUS_TYPE_UINT16:
 112                 signature = DBUS_TYPE_UINT16_AS_STRING;
 113                 break;
 114         case DBUS_TYPE_UINT32:
 115                 signature = DBUS_TYPE_UINT32_AS_STRING;
 116                 break;
 117         case DBUS_TYPE_OBJECT_PATH:
 118                 signature = DBUS_TYPE_OBJECT_PATH_AS_STRING;
 119                 break;
 120         default:
 121                 signature = DBUS_TYPE_VARIANT_AS_STRING;
 122                 break;
 123         }
 124
 125         dbus_message_iter_open_container(&entry, DBUS_TYPE_VARIANT,
 126                                                         signature, &value);
 127         dbus_message_iter_append_basic(&value, type, val);
 128         dbus_message_iter_close_container(&entry, &value);
 129
 130         dbus_message_iter_close_container(dict, &entry);
 131 }
 132
 133 static void append_property(DBusMessageIter *dict,
 134                                 struct connman_property *property)
 135 {
 136         if (property->flags & CONNMAN_PROPERTY_FLAG_STATIC) {
 137                 append_entry(dict, property->name, property->type,
 138                                                         &property->value);
 139                 return;
 140         }
 141 }
 142
 143 static DBusMessage *get_properties(DBusConnection *conn,
 144                                         DBusMessage *msg, void *data)
 145 {
 146         struct connman_element *element = data;
 147         GSList *list;
 148         DBusMessage *reply;
 149         DBusMessageIter array, dict;
 150         const char *str;
 151
 152         DBG("conn %p", conn);
 153
 154         reply = dbus_message_new_method_return(msg);
 155         if (reply == NULL)
 156                 return NULL;
 157
 158         dbus_message_iter_init_append(reply, &array);
 159
 160         dbus_message_iter_open_container(&array, DBUS_TYPE_ARRAY,
 161                         DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
 162                         DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
 163                         DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
 164
 165         if (element->parent != NULL)
 166                 append_entry(&dict, "Parent",
 167                                 DBUS_TYPE_OBJECT_PATH, &element->parent->path);
 168
 169         str = type2string(element->type);
 170         if (str != NULL)
 171                 append_entry(&dict, "Type", DBUS_TYPE_STRING, &str);
 172         str = subtype2string(element->subtype);
 173         if (str != NULL)
 174                 append_entry(&dict, "Subtype", DBUS_TYPE_STRING, &str);
 175
 176         append_entry(&dict, "Connected",
 177                                 DBUS_TYPE_BOOLEAN, &element->connected);
 178
 179         if (element->priority > 0)
 180                 append_entry(&dict, "Priority",
 181                                 DBUS_TYPE_UINT16, &element->priority);
 182
 183         if (element->network.identifier != NULL)
 184                 append_entry(&dict, "Identifier",
 185                                 DBUS_TYPE_STRING, &element->network.identifier);
 186
 187         if (element->ipv4.address != NULL)
 188                 append_entry(&dict, "IPv4.Address",
 189                                 DBUS_TYPE_STRING, &element->ipv4.address);
 190         if (element->ipv4.netmask != NULL)
 191                 append_entry(&dict, "IPv4.Netmask",
 192                                 DBUS_TYPE_STRING, &element->ipv4.netmask);
 193         if (element->ipv4.gateway != NULL)
 194                 append_entry(&dict, "IPv4.Gateway",
 195                                 DBUS_TYPE_STRING, &element->ipv4.gateway);
 196
 197         for (list = element->properties; list; list = list->next) {
 198                 struct connman_property *property = list->data;
 199
 200                 append_property(&dict, property);
 201         }
 202
 203         dbus_message_iter_close_container(&array, &dict);
 204
 205         return reply;
 206 }
 207
 208 static DBusMessage *set_property(DBusConnection *conn,
 209                                         DBusMessage *msg, void *data)
 210 {
 211         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 212 }
 213
 214 static DBusMessage *do_update(DBusConnection *conn,
 215                                         DBusMessage *msg, void *data)
 216 {
 217         struct connman_element *element = data;
 218
 219         DBG("conn %p", conn);
 220
 221         if (element->driver == NULL)
 222                 return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 223
 224         if (element->driver->update) {
 225                 DBG("Calling update callback");
 226                 element->driver->update(element);
 227         }
 228
 229         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 230 }
 231
 232 static DBusMessage *do_connect(DBusConnection *conn,
 233                                         DBusMessage *msg, void *data)
 234 {
 235         struct connman_element *element = data;
 236
 237         DBG("conn %p", conn);
 238
 239         if (element->driver == NULL)
 240                 return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 241
 242         if (element->driver->connect) {
 243                 DBG("Calling connect callback");
 244                 element->driver->connect(element);
 245         }
 246
 247         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 248 }
 249
 250 static DBusMessage *do_disconnect(DBusConnection *conn,
 251                                         DBusMessage *msg, void *data)
 252 {
 253         struct connman_element *element = data;
 254
 255         DBG("conn %p", conn);
 256
 257         if (element->driver == NULL)
 258                 return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 259
 260         if (element->driver->disconnect) {
 261                 DBG("Calling disconnect callback");
 262                 element->driver->disconnect(element);
 263         }
 264
 265         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 266 }
 267
 268 static GDBusMethodTable element_methods[] = {
 269         { "GetProperties", "",   "a{sv}", get_properties },
 270         { "SetProperty",   "sv", "",      set_property   },
 271         { "Update",        "",   "",      do_update      },
 272         { "Connect",       "",   "",      do_connect     },
 273         { "Disconnect",    "",   "",      do_disconnect  },
 274         { },
 275 };
 276
 277 struct append_filter {
 278         enum connman_element_type type;
 279         DBusMessageIter *iter;
 280 };
 281
 282 static gboolean append_path(GNode *node, gpointer data)
 283 {
 284         struct connman_element *element = node->data;
 285         struct append_filter *filter = data;
 286
 287         DBG("element %p name %s", element, element->name);
 288
 289         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 290                 return FALSE;
 291
 292         if (filter->type != CONNMAN_ELEMENT_TYPE_UNKNOWN &&
 293                                         filter->type != element->type)
 294                 return FALSE;
 295
 296         dbus_message_iter_append_basic(filter->iter,
 297                                 DBUS_TYPE_OBJECT_PATH, &element->path);
 298
 299         return FALSE;
 300 }
 301
 302 void __connman_element_list(enum connman_element_type type,
 303                                                 DBusMessageIter *iter)
 304 {
 305         struct append_filter filter = { type, iter };
 306
 307         DBG("");
 308
 309         g_static_rw_lock_reader_lock(&element_lock);
 310         g_node_traverse(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 311                                                         append_path, &filter);
 312         g_static_rw_lock_reader_unlock(&element_lock);
 313 }
 314
 315 static gint compare_priority(gconstpointer a, gconstpointer b)
 316 {
 317         const struct connman_driver *driver1 = a;
 318         const struct connman_driver *driver2 = b;
 319
 320         return driver2->priority - driver1->priority;
 321 }
 322
 323 static gboolean match_driver(struct connman_element *element,
 324                                         struct connman_driver *driver)
 325 {
 326         if (element->type != driver->type &&
 327                         driver->type != CONNMAN_ELEMENT_TYPE_UNKNOWN)
 328                 return FALSE;
 329
 330         if (element->subtype == driver->subtype ||
 331                         driver->subtype == CONNMAN_ELEMENT_SUBTYPE_UNKNOWN)
 332                 return TRUE;
 333
 334         return FALSE;
 335 }
 336
 337 static gboolean probe_driver(GNode *node, gpointer data)
 338 {
 339         struct connman_element *element = node->data;
 340         struct connman_driver *driver = data;
 341
 342         DBG("element %p name %s", element, element->name);
 343
 344         if (!element->driver && match_driver(element, driver) == TRUE) {
 345                 if (driver->probe(element) < 0)
 346                         return FALSE;
 347
 348                 connman_element_lock(element);
 349                 element->driver = driver;
 350                 connman_element_unlock(element);
 351         }
 352
 353         return FALSE;
 354 }
 355
 356 int connman_driver_register(struct connman_driver *driver)
 357 {
 358         DBG("driver %p name %s", driver, driver->name);
 359
 360         if (driver->type == CONNMAN_ELEMENT_TYPE_ROOT)
 361                 return -EINVAL;
 362
 363         if (!driver->probe)
 364                 return -EINVAL;
 365
 366         g_static_rw_lock_writer_lock(&element_lock);
 367
 368         driver_list = g_slist_insert_sorted(driver_list, driver,
 369                                                         compare_priority);
 370
 371         if (element_root != NULL)
 372                 g_node_traverse(element_root, G_PRE_ORDER,
 373                                 G_TRAVERSE_ALL, -1, probe_driver, driver);
 374
 375         g_static_rw_lock_writer_unlock(&element_lock);
 376
 377         return 0;
 378 }
 379
 380 static gboolean remove_driver(GNode *node, gpointer data)
 381 {
 382         struct connman_element *element = node->data;
 383         struct connman_driver *driver = data;
 384
 385         DBG("element %p name %s", element, element->name);
 386
 387         if (element->driver == driver) {
 388                 if (driver->remove)
 389                         driver->remove(element);
 390
 391                 connman_element_lock(element);
 392                 element->driver = NULL;
 393                 connman_element_unlock(element);
 394         }
 395
 396         return FALSE;
 397 }
 398
 399 void connman_driver_unregister(struct connman_driver *driver)
 400 {
 401         DBG("driver %p name %s", driver, driver->name);
 402
 403         g_static_rw_lock_writer_lock(&element_lock);
 404
 405         driver_list = g_slist_remove(driver_list, driver);
 406
 407         if (element_root != NULL)
 408                 g_node_traverse(element_root, G_POST_ORDER,
 409                                 G_TRAVERSE_ALL, -1, remove_driver, driver);
 410
 411         g_static_rw_lock_writer_unlock(&element_lock);
 412 }
 413
 414 struct connman_element *connman_element_create(void)
 415 {
 416         struct connman_element *element;
 417
 418         element = g_new0(struct connman_element, 1);
 419
 420         DBG("element %p", element);
 421
 422         element->refcount = 1;
 423
 424         g_static_mutex_init(&element->mutex);
 425
 426         element->type    = CONNMAN_ELEMENT_TYPE_UNKNOWN;
 427         element->subtype = CONNMAN_ELEMENT_SUBTYPE_UNKNOWN;
 428         element->state   = CONNMAN_ELEMENT_STATE_CLOSED;
 429
 430         element->connected = FALSE;
 431
 432         element->netdev.index = -1;
 433
 434         return element;
 435 }
 436
 437 struct connman_element *connman_element_ref(struct connman_element *element)
 438 {
 439         DBG("element %p name %s refcount %d", element, element->name,
 440                                 g_atomic_int_get(&element->refcount) + 1);
 441
 442         g_atomic_int_inc(&element->refcount);
 443
 444         return element;
 445 }
 446
 447 void connman_element_unref(struct connman_element *element)
 448 {
 449         DBG("element %p name %s refcount %d", element, element->name,
 450                                 g_atomic_int_get(&element->refcount) - 1);
 451
 452         if (g_atomic_int_dec_and_test(&element->refcount) == TRUE) {
 453                 GSList *list;
 454
 455                 for (list = element->properties; list; list = list->next) {
 456                         struct connman_property *property = list->data;
 457                         if ((property->flags & CONNMAN_PROPERTY_FLAG_STATIC) &&
 458                                         property->type == DBUS_TYPE_STRING)
 459                                 g_free(property->value);
 460                         g_free(property);
 461                         list->data = NULL;
 462                 }
 463                 g_slist_free(element->properties);
 464
 465                 g_free(element->ipv4.address);
 466                 g_free(element->ipv4.netmask);
 467                 g_free(element->ipv4.gateway);
 468                 g_free(element->ipv4.network);
 469                 g_free(element->ipv4.broadcast);
 470                 g_free(element->ipv4.nameserver);
 471                 g_free(element->network.identifier);
 472                 g_free(element->netdev.name);
 473                 g_free(element->path);
 474                 g_free(element->name);
 475                 g_free(element);
 476         }
 477 }
 478
 479 int connman_element_add_static_property(struct connman_element *element,
 480                                 const char *name, int type, const void *value)
 481 {
 482         struct connman_property *property;
 483
 484         DBG("element %p name %s", element, element->name);
 485
 486         if (type != DBUS_TYPE_STRING)
 487                 return -EINVAL;
 488
 489         property = g_try_new0(struct connman_property, 1);
 490         if (property == NULL)
 491                 return -ENOMEM;
 492
 493         property->flags = CONNMAN_PROPERTY_FLAG_STATIC;
 494
 495         property->name = g_strdup(name);
 496         property->type = type;
 497
 498         DBG("name %s type %d value %p", name, type, value);
 499
 500         switch (type) {
 501         case DBUS_TYPE_STRING:
 502                 property->value = g_strdup(*((const char **) value));
 503                 break;
 504         }
 505
 506         connman_element_lock(element);
 507         element->properties = g_slist_append(element->properties, property);
 508         connman_element_unlock(element);
 509
 510         return 0;
 511 }
 512
 513 int connman_element_set_property(struct connman_element *element,
 514                         enum connman_property_type type, const void *value)
 515 {
 516         switch (type) {
 517         case CONNMAN_PROPERTY_TYPE_INVALID:
 518                 return -EINVAL;
 519         case CONNMAN_PROPERTY_TYPE_IPV4_ADDRESS:
 520                 connman_element_lock(element);
 521                 g_free(element->ipv4.address);
 522                 element->ipv4.address = g_strdup(*((const char **) value));
 523                 connman_element_unlock(element);
 524                 break;
 525         case CONNMAN_PROPERTY_TYPE_IPV4_NETMASK:
 526                 connman_element_lock(element);
 527                 g_free(element->ipv4.netmask);
 528                 element->ipv4.netmask = g_strdup(*((const char **) value));
 529                 connman_element_unlock(element);
 530                 break;
 531         case CONNMAN_PROPERTY_TYPE_IPV4_GATEWAY:
 532                 connman_element_lock(element);
 533                 g_free(element->ipv4.gateway);
 534                 element->ipv4.gateway = g_strdup(*((const char **) value));
 535                 connman_element_unlock(element);
 536                 break;
 537         case CONNMAN_PROPERTY_TYPE_IPV4_NAMESERVER:
 538                 connman_element_lock(element);
 539                 g_free(element->ipv4.nameserver);
 540                 element->ipv4.nameserver = g_strdup(*((const char **) value));
 541                 connman_element_unlock(element);
 542                 break;
 543         }
 544
 545         g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 546                                 CONNMAN_MANAGER_INTERFACE, "ElementUpdated",
 547                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 548                                                         DBUS_TYPE_INVALID);
 549
 550         return 0;
 551 }
 552
 553 int connman_element_get_value(struct connman_element *element,
 554                                 enum connman_property_type type, void *value)
 555 {
 556         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 557                 return -EINVAL;
 558
 559         switch (type) {
 560         case CONNMAN_PROPERTY_TYPE_INVALID:
 561                 return -EINVAL;
 562         case CONNMAN_PROPERTY_TYPE_IPV4_ADDRESS:
 563                 if (element->ipv4.address == NULL)
 564                         return connman_element_get_value(element->parent,
 565                                                                 type, value);
 566                 connman_element_lock(element);
 567                 *((char **) value) = element->ipv4.address;
 568                 connman_element_unlock(element);
 569                 break;
 570         case CONNMAN_PROPERTY_TYPE_IPV4_NETMASK:
 571                 if (element->ipv4.netmask == NULL)
 572                         return connman_element_get_value(element->parent,
 573                                                                 type, value);
 574                 connman_element_lock(element);
 575                 *((char **) value) = element->ipv4.netmask;
 576                 connman_element_unlock(element);
 577                 break;
 578         case CONNMAN_PROPERTY_TYPE_IPV4_GATEWAY:
 579                 if (element->ipv4.gateway == NULL)
 580                         return connman_element_get_value(element->parent,
 581                                                                 type, value);
 582                 connman_element_lock(element);
 583                 *((char **) value) = element->ipv4.gateway;
 584                 connman_element_unlock(element);
 585                 break;
 586         case CONNMAN_PROPERTY_TYPE_IPV4_NAMESERVER:
 587                 if (element->ipv4.nameserver == NULL)
 588                         return connman_element_get_value(element->parent,
 589                                                                 type, value);
 590                 connman_element_lock(element);
 591                 *((char **) value) = element->ipv4.nameserver;
 592                 connman_element_unlock(element);
 593                 break;
 594         }
 595
 596         return 0;
 597 }
 598
 599 int connman_element_register(struct connman_element *element,
 600                                         struct connman_element *parent)
 601 {
 602         DBG("element %p name %s parent %p", element, element->name, parent);
 603
 604         if (connman_element_ref(element) == NULL)
 605                 return -EINVAL;
 606
 607         connman_element_lock(element);
 608
 609         __connman_element_load(element);
 610
 611         if (element->name == NULL) {
 612                 switch (element->type) {
 613                 case CONNMAN_ELEMENT_TYPE_IPV4:
 614                         element->name = g_strdup("ipv4");
 615                         break;
 616                 case CONNMAN_ELEMENT_TYPE_IPV6:
 617                         element->name = g_strdup("ipv6");
 618                         break;
 619                 case CONNMAN_ELEMENT_TYPE_DHCP:
 620                         element->name = g_strdup("dhcp");
 621                         break;
 622                 case CONNMAN_ELEMENT_TYPE_BOOTP:
 623                         element->name = g_strdup("bootp");
 624                         break;
 625                 case CONNMAN_ELEMENT_TYPE_ZEROCONF:
 626                         element->name = g_strdup("zeroconf");
 627                         break;
 628                 case CONNMAN_ELEMENT_TYPE_RESOLVER:
 629                         element->name = g_strdup("resolver");
 630                         break;
 631                 case CONNMAN_ELEMENT_TYPE_INTERNET:
 632                         element->name = g_strdup("internet");
 633                         break;
 634                 default:
 635                         break;
 636                 }
 637         }
 638
 639         element->parent = parent;
 640
 641         connman_element_unlock(element);
 642
 643         if (thread_register != NULL)
 644                 g_thread_pool_push(thread_register, element, NULL);
 645
 646         return 0;
 647 }
 648
 649 void connman_element_unregister(struct connman_element *element)
 650 {
 651         DBG("element %p name %s", element, element->name);
 652
 653         if (thread_unregister != NULL)
 654                 g_thread_pool_push(thread_unregister, element, NULL);
 655 }
 656
 657 void connman_element_update(struct connman_element *element)
 658 {
 659         DBG("element %p name %s", element, element->name);
 660
 661         g_static_rw_lock_reader_lock(&element_lock);
 662
 663         if (element->driver && element->driver->update)
 664                 element->driver->update(element);
 665
 666         g_static_rw_lock_reader_unlock(&element_lock);
 667
 668         g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 669                                 CONNMAN_MANAGER_INTERFACE, "ElementUpdated",
 670                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 671                                                         DBUS_TYPE_INVALID);
 672 }
 673
 674 static void register_element(gpointer data, gpointer user_data)
 675 {
 676         struct connman_element *element = data;
 677         const gchar *basepath;
 678         GSList *list;
 679         GNode *node;
 680
 681         g_static_rw_lock_writer_lock(&element_lock);
 682
 683         connman_element_lock(element);
 684
 685         if (element->parent) {
 686                 node = g_node_find(element_root, G_PRE_ORDER,
 687                                         G_TRAVERSE_ALL, element->parent);
 688                 basepath = element->parent->path;
 689
 690                 if (element->subtype == CONNMAN_ELEMENT_SUBTYPE_UNKNOWN)
 691                         element->subtype = element->parent->subtype;
 692         } else {
 693                 node = element_root;
 694                 basepath = "";
 695         }
 696
 697         element->path = g_strdup_printf("%s/%s", basepath, element->name);
 698
 699         connman_element_unlock(element);
 700
 701         DBG("element %p path %s", element, element->path);
 702
 703         g_node_append_data(node, element);
 704
 705         g_static_rw_lock_writer_unlock(&element_lock);
 706
 707         __connman_element_store(element);
 708
 709         if (g_dbus_register_interface(connection, element->path,
 710                                         CONNMAN_ELEMENT_INTERFACE,
 711                                         element_methods, NULL, NULL,
 712                                                 element, NULL) == FALSE)
 713                 connman_error("Failed to register %s", element->path);
 714
 715         g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 716                                 CONNMAN_MANAGER_INTERFACE, "ElementAdded",
 717                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 718                                                         DBUS_TYPE_INVALID);
 719
 720         if (element->type == CONNMAN_ELEMENT_TYPE_DEVICE)
 721                 g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 722                                 CONNMAN_MANAGER_INTERFACE, "DeviceAdded",
 723                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 724                                                         DBUS_TYPE_INVALID);
 725
 726         g_static_rw_lock_writer_lock(&element_lock);
 727
 728         for (list = driver_list; list; list = list->next) {
 729                 struct connman_driver *driver = list->data;
 730
 731                 if (match_driver(element, driver) == FALSE)
 732                         continue;
 733
 734                 DBG("driver %p name %s", driver, driver->name);
 735
 736                 if (driver->probe(element) < 0)
 737                         continue;
 738
 739                 connman_element_lock(element);
 740                 element->driver = driver;
 741                 connman_element_unlock(element);
 742         }
 743
 744         g_static_rw_lock_writer_unlock(&element_lock);
 745 }
 746
 747 static void unregister_element(gpointer data, gpointer user_data)
 748 {
 749         struct connman_element *element = data;
 750         GNode *node;
 751
 752         DBG("element %p name %s", element, element->name);
 753
 754         g_static_rw_lock_writer_lock(&element_lock);
 755
 756         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
 757
 758         if (element->driver) {
 759                 if (element->driver->remove)
 760                         element->driver->remove(element);
 761
 762                 connman_element_lock(element);
 763                 element->driver = NULL;
 764                 connman_element_unlock(element);
 765         }
 766
 767         if (node != NULL) {
 768                 g_node_unlink(node);
 769                 g_node_destroy(node);
 770         }
 771
 772         g_static_rw_lock_writer_unlock(&element_lock);
 773
 774         if (element->type == CONNMAN_ELEMENT_TYPE_DEVICE)
 775                 g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 776                                 CONNMAN_MANAGER_INTERFACE, "DeviceRemoved",
 777                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 778                                                         DBUS_TYPE_INVALID);
 779
 780         g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 781                                 CONNMAN_MANAGER_INTERFACE, "ElementRemoved",
 782                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 783                                                         DBUS_TYPE_INVALID);
 784
 785         g_dbus_unregister_interface(connection, element->path,
 786                                                 CONNMAN_ELEMENT_INTERFACE);
 787
 788         connman_element_unref(element);
 789 }
 790
 791 int __connman_element_init(DBusConnection *conn)
 792 {
 793         struct connman_element *element;
 794
 795         DBG("conn %p", conn);
 796
 797         connection = dbus_connection_ref(conn);
 798         if (connection == NULL)
 799                 return -EIO;
 800
 801         g_static_rw_lock_writer_lock(&element_lock);
 802
 803         element = connman_element_create();
 804
 805         element->name = g_strdup("root");
 806         element->path = g_strdup("/");
 807         element->type = CONNMAN_ELEMENT_TYPE_ROOT;
 808
 809         element_root = g_node_new(element);
 810
 811         g_static_rw_lock_writer_unlock(&element_lock);
 812
 813         thread_register = g_thread_pool_new(register_element,
 814                                                         NULL, 1, FALSE, NULL);
 815         thread_unregister = g_thread_pool_new(unregister_element,
 816                                                         NULL, 1, FALSE, NULL);
 817
 818         return 0;
 819 }
 820
 821 static gboolean free_driver(GNode *node, gpointer data)
 822 {
 823         struct connman_element *element = node->data;
 824
 825         DBG("element %p name %s", element, element->name);
 826
 827         if (element->driver) {
 828                 if (element->driver->remove)
 829                         element->driver->remove(element);
 830
 831                 connman_element_lock(element);
 832                 element->driver = NULL;
 833                 connman_element_unlock(element);
 834         }
 835
 836         return FALSE;
 837 }
 838
 839 static gboolean free_node(GNode *node, gpointer data)
 840 {
 841         struct connman_element *element = node->data;
 842
 843         DBG("element %p name %s", element, element->name);
 844
 845         if (g_node_depth(node) > 1)
 846                 g_thread_pool_push(thread_unregister, element, NULL);
 847
 848         return FALSE;
 849 }
 850
 851 void __connman_element_cleanup(void)
 852 {
 853         DBG("");
 854
 855         g_thread_pool_free(thread_register, TRUE, TRUE);
 856         thread_register = NULL;
 857
 858         g_static_rw_lock_writer_lock(&element_lock);
 859         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
 860                                                         free_driver, NULL);
 861         g_static_rw_lock_writer_unlock(&element_lock);
 862
 863         g_static_rw_lock_writer_lock(&element_lock);
 864         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
 865                                                         free_node, NULL);
 866         g_static_rw_lock_writer_unlock(&element_lock);
 867
 868         g_thread_pool_free(thread_unregister, FALSE, TRUE);
 869         thread_unregister = NULL;
 870
 871         g_static_rw_lock_writer_lock(&element_lock);
 872         g_node_destroy(element_root);
 873         element_root = NULL;
 874         g_static_rw_lock_writer_unlock(&element_lock);
 875
 876         dbus_connection_unref(connection);
 877 }