vcs.maemo.org Git - connman/blob - src/element.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2009  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 #include <stdarg.h>
  28 #include <string.h>
  29
  30 #include <glib.h>
  31 #include <gdbus.h>
  32
  33 #include "connman.h"
  34
  35 static DBusConnection *connection;
  36
  37 static GNode *element_root = NULL;
  38 static GSList *driver_list = NULL;
  39 static gchar *device_filter = NULL;
  40
  41 static gboolean started = FALSE;
  42
  43 static struct {
  44         enum connman_property_id id;
  45         int type;
  46         const char *name;
  47         const void *value;
  48 } propid_table[] = {
  49         { CONNMAN_PROPERTY_ID_IPV4_METHOD,
  50                 DBUS_TYPE_STRING, "IPv4.Method", "dhcp" },
  51         { CONNMAN_PROPERTY_ID_IPV4_ADDRESS,
  52                 DBUS_TYPE_STRING, "IPv4.Address" },
  53         { CONNMAN_PROPERTY_ID_IPV4_NETMASK,
  54                 DBUS_TYPE_STRING, "IPv4.Netmask" },
  55         { CONNMAN_PROPERTY_ID_IPV4_GATEWAY,
  56                 DBUS_TYPE_STRING, "IPv4.Gateway" },
  57         { CONNMAN_PROPERTY_ID_IPV4_BROADCAST,
  58                 DBUS_TYPE_STRING, "IPv4.Broadcast" },
  59         { CONNMAN_PROPERTY_ID_IPV4_NAMESERVER,
  60                 DBUS_TYPE_STRING, "IPv4.Nameserver" },
  61         { }
  62 };
  63
  64 static int propid2type(enum connman_property_id id)
  65 {
  66         int i;
  67
  68         for (i = 0; propid_table[i].name; i++) {
  69                 if (propid_table[i].id == id)
  70                         return propid_table[i].type;
  71         }
  72
  73         return DBUS_TYPE_INVALID;
  74 }
  75
  76 static const char *propid2name(enum connman_property_id id)
  77 {
  78         int i;
  79
  80         for (i = 0; propid_table[i].name; i++) {
  81                 if (propid_table[i].id == id)
  82                         return propid_table[i].name;
  83         }
  84
  85         return NULL;
  86 }
  87
  88 static const char *type2string(enum connman_element_type type)
  89 {
  90         switch (type) {
  91         case CONNMAN_ELEMENT_TYPE_UNKNOWN:
  92                 return "unknown";
  93         case CONNMAN_ELEMENT_TYPE_ROOT:
  94                 return "root";
  95         case CONNMAN_ELEMENT_TYPE_PROFILE:
  96                 return "profile";
  97         case CONNMAN_ELEMENT_TYPE_DEVICE:
  98                 return "device";
  99         case CONNMAN_ELEMENT_TYPE_NETWORK:
 100                 return "network";
 101         case CONNMAN_ELEMENT_TYPE_SERVICE:
 102                 return "service";
 103         case CONNMAN_ELEMENT_TYPE_PPP:
 104                 return "ppp";
 105         case CONNMAN_ELEMENT_TYPE_IPV4:
 106                 return "ipv4";
 107         case CONNMAN_ELEMENT_TYPE_IPV6:
 108                 return "ipv6";
 109         case CONNMAN_ELEMENT_TYPE_DHCP:
 110                 return "dhcp";
 111         case CONNMAN_ELEMENT_TYPE_BOOTP:
 112                 return "bootp";
 113         case CONNMAN_ELEMENT_TYPE_ZEROCONF:
 114                 return "zeroconf";
 115         case CONNMAN_ELEMENT_TYPE_CONNECTION:
 116                 return "connection";
 117         case CONNMAN_ELEMENT_TYPE_VENDOR:
 118                 return "vendor";
 119         }
 120
 121         return NULL;
 122 }
 123
 124 const char *__connman_ipv4_method2string(enum connman_ipv4_method method)
 125 {
 126         switch (method) {
 127         case CONNMAN_IPV4_METHOD_UNKNOWN:
 128                 return "unknown";
 129         case CONNMAN_IPV4_METHOD_OFF:
 130                 return "off";
 131         case CONNMAN_IPV4_METHOD_STATIC:
 132                 return "static";
 133         case CONNMAN_IPV4_METHOD_DHCP:
 134                 return "dhcp";
 135         }
 136
 137         return "unknown";
 138 }
 139
 140 enum connman_ipv4_method __connman_ipv4_string2method(const char *method)
 141 {
 142         if (strcasecmp(method, "off") == 0)
 143                 return CONNMAN_IPV4_METHOD_OFF;
 144         else if (strcasecmp(method, "static") == 0)
 145                 return CONNMAN_IPV4_METHOD_STATIC;
 146         else if (strcasecmp(method, "dhcp") == 0)
 147                 return CONNMAN_IPV4_METHOD_DHCP;
 148         else
 149                 return CONNMAN_IPV4_METHOD_UNKNOWN;
 150 }
 151
 152 #if 0
 153 static void append_property(DBusMessageIter *dict,
 154                                 struct connman_property *property)
 155 {
 156         if (property->value == NULL)
 157                 return;
 158
 159         switch (property->type) {
 160         case DBUS_TYPE_ARRAY:
 161                 connman_dbus_dict_append_array(dict, property->name,
 162                         property->subtype, &property->value, property->size);
 163                 break;
 164         case DBUS_TYPE_STRING:
 165                 connman_dbus_dict_append_variant(dict, property->name,
 166                                         property->type, &property->value);
 167                 break;
 168         default:
 169                 connman_dbus_dict_append_variant(dict, property->name,
 170                                         property->type, property->value);
 171                 break;
 172         }
 173 }
 174
 175 static void add_common_properties(struct connman_element *element,
 176                                                 DBusMessageIter *dict)
 177 {
 178         const char *address = NULL, *netmask = NULL, *gateway = NULL;
 179         GSList *list;
 180
 181         connman_element_get_value(element,
 182                                 CONNMAN_PROPERTY_ID_IPV4_ADDRESS, &address);
 183         connman_element_get_value(element,
 184                                 CONNMAN_PROPERTY_ID_IPV4_NETMASK, &netmask);
 185         connman_element_get_value(element,
 186                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 187
 188         if (element->priority > 0)
 189                 connman_dbus_dict_append_variant(dict, "Priority",
 190                                         DBUS_TYPE_UINT16, &element->priority);
 191
 192         if (address != NULL)
 193                 connman_dbus_dict_append_variant(dict, "IPv4.Address",
 194                                                 DBUS_TYPE_STRING, &address);
 195         if (netmask != NULL)
 196                 connman_dbus_dict_append_variant(dict, "IPv4.Netmask",
 197                                                 DBUS_TYPE_STRING, &netmask);
 198         if (gateway != NULL)
 199                 connman_dbus_dict_append_variant(dict, "IPv4.Gateway",
 200                                                 DBUS_TYPE_STRING, &gateway);
 201
 202         if (element->wifi.security != NULL) {
 203                 const char *passphrase = "";
 204
 205                 connman_dbus_dict_append_variant(dict, "WiFi.Security",
 206                                 DBUS_TYPE_STRING, &element->wifi.security);
 207
 208                 if (element->wifi.passphrase != NULL)
 209                         passphrase = element->wifi.passphrase;
 210
 211                 connman_dbus_dict_append_variant(dict, "WiFi.Passphrase",
 212                                 DBUS_TYPE_STRING, &passphrase);
 213         }
 214
 215         __connman_element_lock(element);
 216
 217         for (list = element->properties; list; list = list->next) {
 218                 struct connman_property *property = list->data;
 219
 220                 append_property(dict, property);
 221         }
 222
 223         __connman_element_unlock(element);
 224 }
 225
 226 static void set_common_property(struct connman_element *element,
 227                                 const char *name, DBusMessageIter *value)
 228 {
 229         GSList *list;
 230
 231         if (g_str_equal(name, "Priority") == TRUE) {
 232                 dbus_message_iter_get_basic(value, &element->priority);
 233                 return;
 234         }
 235
 236         __connman_element_lock(element);
 237
 238         for (list = element->properties; list; list = list->next) {
 239                 struct connman_property *property = list->data;
 240                 const char *str;
 241
 242                 if (g_str_equal(property->name, name) == FALSE)
 243                         continue;
 244
 245                 if (property->flags & CONNMAN_PROPERTY_FLAG_STATIC)
 246                         continue;
 247
 248                 property->flags &= ~CONNMAN_PROPERTY_FLAG_REFERENCE;
 249
 250                 if (property->type == DBUS_TYPE_STRING) {
 251                         dbus_message_iter_get_basic(value, &str);
 252                         g_free(property->value);
 253                         property->value = g_strdup(str);
 254                 } else
 255                         property->value = NULL;
 256         }
 257
 258         __connman_element_unlock(element);
 259 }
 260 #endif
 261
 262 static void emit_element_signal(DBusConnection *conn, const char *member,
 263                                         struct connman_element *element)
 264 {
 265         DBusMessage *signal;
 266
 267         if (__connman_debug_enabled() == FALSE)
 268                 return;
 269
 270         DBG("conn %p member %s", conn, member);
 271
 272         if (element == NULL)
 273                 return;
 274
 275         signal = dbus_message_new_signal(element->path,
 276                                         CONNMAN_DEBUG_INTERFACE, member);
 277         if (signal == NULL)
 278                 return;
 279
 280         g_dbus_send_message(conn, signal);
 281 }
 282
 283 struct foreach_data {
 284         enum connman_element_type type;
 285         element_cb_t callback;
 286         gpointer user_data;
 287 };
 288
 289 static gboolean foreach_callback(GNode *node, gpointer user_data)
 290 {
 291         struct connman_element *element = node->data;
 292         struct foreach_data *data = user_data;
 293
 294         DBG("element %p name %s", element, element->name);
 295
 296         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 297                 return FALSE;
 298
 299         if (data->type != CONNMAN_ELEMENT_TYPE_UNKNOWN &&
 300                                         data->type != element->type)
 301                 return FALSE;
 302
 303         if (data->callback)
 304                 data->callback(element, data->user_data);
 305
 306         return FALSE;
 307 }
 308
 309 void __connman_element_foreach(struct connman_element *element,
 310                                 enum connman_element_type type,
 311                                 element_cb_t callback, gpointer user_data)
 312 {
 313         struct foreach_data data = { type, callback, user_data };
 314         GNode *node;
 315
 316         DBG("");
 317
 318         if (element != NULL) {
 319                 node = g_node_find(element_root, G_PRE_ORDER,
 320                                                 G_TRAVERSE_ALL, element);
 321                 if (node == NULL)
 322                         return;
 323         } else
 324                 node = element_root;
 325
 326         g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 327                                                 foreach_callback, &data);
 328 }
 329
 330 struct append_filter {
 331         enum connman_element_type type;
 332         DBusMessageIter *iter;
 333 };
 334
 335 static gboolean append_path(GNode *node, gpointer user_data)
 336 {
 337         struct connman_element *element = node->data;
 338         struct append_filter *filter = user_data;
 339
 340         DBG("element %p name %s", element, element->name);
 341
 342         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 343                 return FALSE;
 344
 345         if (filter->type != CONNMAN_ELEMENT_TYPE_UNKNOWN &&
 346                                         filter->type != element->type)
 347                 return FALSE;
 348
 349         if (filter->type == CONNMAN_ELEMENT_TYPE_DEVICE &&
 350                         __connman_device_has_driver(element->device) == FALSE)
 351                 return FALSE;
 352
 353         if (filter->type == CONNMAN_ELEMENT_TYPE_NETWORK &&
 354                         __connman_network_has_driver(element->network) == FALSE)
 355                 return FALSE;
 356
 357         dbus_message_iter_append_basic(filter->iter,
 358                                 DBUS_TYPE_OBJECT_PATH, &element->path);
 359
 360         return FALSE;
 361 }
 362
 363 void __connman_element_list(struct connman_element *element,
 364                                         enum connman_element_type type,
 365                                                         DBusMessageIter *iter)
 366 {
 367         struct append_filter filter = { type, iter };
 368         GNode *node;
 369
 370         DBG("");
 371
 372         if (element != NULL) {
 373                 node = g_node_find(element_root, G_PRE_ORDER,
 374                                                 G_TRAVERSE_ALL, element);
 375                 if (node == NULL)
 376                         return;
 377         } else
 378                 node = element_root;
 379
 380         g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 381                                                 append_path, &filter);
 382 }
 383
 384 struct count_data {
 385         enum connman_element_type type;
 386         int count;
 387 };
 388
 389 static gboolean count_element(GNode *node, gpointer user_data)
 390 {
 391         struct connman_element *element = node->data;
 392         struct count_data *data = user_data;
 393
 394         DBG("element %p name %s", element, element->name);
 395
 396         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 397                 return FALSE;
 398
 399         if (data->type != CONNMAN_ELEMENT_TYPE_UNKNOWN &&
 400                                         data->type != element->type)
 401                 return FALSE;
 402
 403         data->count++;
 404
 405         return FALSE;
 406 }
 407
 408 int __connman_element_count(struct connman_element *element,
 409                                         enum connman_element_type type)
 410 {
 411         struct count_data data = { type, 0 };
 412         GNode *node;
 413
 414         DBG("");
 415
 416         if (element != NULL) {
 417                 node = g_node_find(element_root, G_PRE_ORDER,
 418                                                 G_TRAVERSE_ALL, element);
 419                 if (node == NULL)
 420                         return 0;
 421         } else
 422                 node = element_root;
 423
 424         g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 425                                                 count_element, &data);
 426
 427         return data.count;
 428 }
 429
 430 const char *__connman_element_get_device(struct connman_element *element)
 431 {
 432         if (element->type == CONNMAN_ELEMENT_TYPE_DEVICE &&
 433                                                 element->device != NULL)
 434                 return element->path;
 435
 436         if (element->parent == NULL)
 437                 return NULL;
 438
 439         return __connman_element_get_device(element->parent);
 440 }
 441
 442 const char *__connman_element_get_network(struct connman_element *element)
 443 {
 444         if (element->type == CONNMAN_ELEMENT_TYPE_NETWORK &&
 445                                                 element->network != NULL)
 446                 return element->path;
 447
 448         if (element->parent == NULL)
 449                 return NULL;
 450
 451         return __connman_element_get_network(element->parent);
 452 }
 453
 454 static gint compare_priority(gconstpointer a, gconstpointer b)
 455 {
 456         const struct connman_driver *driver1 = a;
 457         const struct connman_driver *driver2 = b;
 458
 459         return driver2->priority - driver1->priority;
 460 }
 461
 462 static gboolean match_driver(struct connman_element *element,
 463                                         struct connman_driver *driver)
 464 {
 465         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 466                 return FALSE;
 467
 468         if (element->type == driver->type ||
 469                         driver->type == CONNMAN_ELEMENT_TYPE_UNKNOWN)
 470                 return TRUE;
 471
 472         return FALSE;
 473 }
 474
 475 static gboolean probe_driver(GNode *node, gpointer data)
 476 {
 477         struct connman_element *element = node->data;
 478         struct connman_driver *driver = data;
 479
 480         DBG("element %p name %s", element, element->name);
 481
 482         if (!element->driver && match_driver(element, driver) == TRUE) {
 483                 if (driver->probe(element) < 0)
 484                         return FALSE;
 485
 486                 __connman_element_lock(element);
 487                 element->driver = driver;
 488                 __connman_element_unlock(element);
 489         }
 490
 491         return FALSE;
 492 }
 493
 494 void __connman_driver_rescan(struct connman_driver *driver)
 495 {
 496         DBG("driver %p name %s", driver, driver->name);
 497
 498         if (!driver->probe)
 499                 return;
 500
 501         if (element_root != NULL)
 502                 g_node_traverse(element_root, G_PRE_ORDER,
 503                                 G_TRAVERSE_ALL, -1, probe_driver, driver);
 504 }
 505
 506 /**
 507  * connman_driver_register:
 508  * @driver: driver definition
 509  *
 510  * Register a new driver
 511  *
 512  * Returns: %0 on success
 513  */
 514 int connman_driver_register(struct connman_driver *driver)
 515 {
 516         DBG("driver %p name %s", driver, driver->name);
 517
 518         if (driver->type == CONNMAN_ELEMENT_TYPE_ROOT)
 519                 return -EINVAL;
 520
 521         if (!driver->probe)
 522                 return -EINVAL;
 523
 524         driver_list = g_slist_insert_sorted(driver_list, driver,
 525                                                         compare_priority);
 526
 527         if (started == FALSE)
 528                 return 0;
 529
 530         if (element_root != NULL)
 531                 g_node_traverse(element_root, G_PRE_ORDER,
 532                                 G_TRAVERSE_ALL, -1, probe_driver, driver);
 533
 534         return 0;
 535 }
 536
 537 static gboolean remove_driver(GNode *node, gpointer data)
 538 {
 539         struct connman_element *element = node->data;
 540         struct connman_driver *driver = data;
 541
 542         DBG("element %p name %s", element, element->name);
 543
 544         if (element->driver == driver) {
 545                 if (driver->remove)
 546                         driver->remove(element);
 547
 548                 __connman_element_lock(element);
 549                 element->driver = NULL;
 550                 __connman_element_unlock(element);
 551         }
 552
 553         return FALSE;
 554 }
 555
 556 /**
 557  * connman_driver_unregister:
 558  * @driver: driver definition
 559  *
 560  * Remove a previously registered driver
 561  */
 562 void connman_driver_unregister(struct connman_driver *driver)
 563 {
 564         DBG("driver %p name %s", driver, driver->name);
 565
 566         driver_list = g_slist_remove(driver_list, driver);
 567
 568         if (element_root != NULL)
 569                 g_node_traverse(element_root, G_POST_ORDER,
 570                                 G_TRAVERSE_ALL, -1, remove_driver, driver);
 571 }
 572
 573 /**
 574  * connman_element_create:
 575  * @name: element name
 576  *
 577  * Allocate a new element and assign the given #name to it. If the name
 578  * is #NULL, it will be later on created based on the element type.
 579  *
 580  * Returns: a newly-allocated #connman_element structure
 581  */
 582 struct connman_element *connman_element_create(const char *name)
 583 {
 584         struct connman_element *element;
 585
 586         element = g_try_new0(struct connman_element, 1);
 587         if (element == NULL)
 588                 return NULL;
 589
 590         DBG("element %p", element);
 591
 592         element->refcount = 1;
 593
 594         element->name    = g_strdup(name);
 595         element->type    = CONNMAN_ELEMENT_TYPE_UNKNOWN;
 596         element->index   = -1;
 597         element->enabled = FALSE;
 598
 599         return element;
 600 }
 601
 602 struct connman_element *connman_element_ref(struct connman_element *element)
 603 {
 604         DBG("element %p name %s refcount %d", element, element->name,
 605                                 g_atomic_int_get(&element->refcount) + 1);
 606
 607         g_atomic_int_inc(&element->refcount);
 608
 609         return element;
 610 }
 611
 612 static void free_properties(struct connman_element *element)
 613 {
 614         GSList *list;
 615
 616         DBG("element %p name %s", element, element->name);
 617
 618         __connman_element_lock(element);
 619
 620         for (list = element->properties; list; list = list->next) {
 621                 struct connman_property *property = list->data;
 622
 623                 if (!(property->flags & CONNMAN_PROPERTY_FLAG_REFERENCE))
 624                         g_free(property->value);
 625
 626                 g_free(property->name);
 627                 g_free(property);
 628         }
 629
 630         g_slist_free(element->properties);
 631
 632         element->properties = NULL;
 633
 634         __connman_element_unlock(element);
 635 }
 636
 637 void connman_element_unref(struct connman_element *element)
 638 {
 639         DBG("element %p name %s refcount %d", element, element->name,
 640                                 g_atomic_int_get(&element->refcount) - 1);
 641
 642         if (g_atomic_int_dec_and_test(&element->refcount) == TRUE) {
 643                 if (element->destruct)
 644                         element->destruct(element);
 645                 free_properties(element);
 646                 g_free(element->ipv4.address);
 647                 g_free(element->ipv4.netmask);
 648                 g_free(element->ipv4.gateway);
 649                 g_free(element->ipv4.network);
 650                 g_free(element->ipv4.broadcast);
 651                 g_free(element->ipv4.nameserver);
 652                 g_free(element->devname);
 653                 g_free(element->path);
 654                 g_free(element->name);
 655                 g_free(element);
 656         }
 657 }
 658
 659 int connman_element_add_static_property(struct connman_element *element,
 660                                 const char *name, int type, const void *value)
 661 {
 662         struct connman_property *property;
 663
 664         DBG("element %p name %s", element, element->name);
 665
 666         if (type != DBUS_TYPE_STRING && type != DBUS_TYPE_BYTE)
 667                 return -EINVAL;
 668
 669         property = g_try_new0(struct connman_property, 1);
 670         if (property == NULL)
 671                 return -ENOMEM;
 672
 673         property->flags = CONNMAN_PROPERTY_FLAG_STATIC;
 674         property->id    = CONNMAN_PROPERTY_ID_INVALID;
 675         property->name  = g_strdup(name);
 676         property->type  = type;
 677
 678         DBG("name %s type %d value %p", name, type, value);
 679
 680         switch (type) {
 681         case DBUS_TYPE_STRING:
 682                 property->value = g_strdup(*((const char **) value));
 683                 break;
 684         case DBUS_TYPE_BYTE:
 685                 property->value = g_try_malloc(1);
 686                 if (property->value != NULL)
 687                         memcpy(property->value, value, 1);
 688                 break;
 689         }
 690
 691         __connman_element_lock(element);
 692         element->properties = g_slist_append(element->properties, property);
 693         __connman_element_unlock(element);
 694
 695         return 0;
 696 }
 697
 698 int connman_element_set_static_property(struct connman_element *element,
 699                                 const char *name, int type, const void *value)
 700 {
 701         GSList *list;
 702
 703         DBG("element %p name %s", element, element->name);
 704
 705         if (type != DBUS_TYPE_STRING && type != DBUS_TYPE_BYTE)
 706                 return -EINVAL;
 707
 708         __connman_element_lock(element);
 709
 710         for (list = element->properties; list; list = list->next) {
 711                 struct connman_property *property = list->data;
 712
 713                 if (g_str_equal(property->name, name) == FALSE)
 714                         continue;
 715
 716                 if (!(property->flags & CONNMAN_PROPERTY_FLAG_STATIC))
 717                         continue;
 718
 719                 property->type = type;
 720                 g_free(property->value);
 721
 722                 switch (type) {
 723                 case DBUS_TYPE_STRING:
 724                         property->value = g_strdup(*((const char **) value));
 725                         break;
 726                 case DBUS_TYPE_BYTE:
 727                         property->value = g_try_malloc(1);
 728                         if (property->value != NULL)
 729                                 memcpy(property->value, value, 1);
 730                         break;
 731                 }
 732         }
 733
 734         __connman_element_unlock(element);
 735
 736         return 0;
 737 }
 738
 739 int connman_element_add_static_array_property(struct connman_element *element,
 740                         const char *name, int type, const void *value, int len)
 741 {
 742         struct connman_property *property;
 743
 744         DBG("element %p name %s", element, element->name);
 745
 746         if (type != DBUS_TYPE_BYTE)
 747                 return -EINVAL;
 748
 749         property = g_try_new0(struct connman_property, 1);
 750         if (property == NULL)
 751                 return -ENOMEM;
 752
 753         property->flags   = CONNMAN_PROPERTY_FLAG_STATIC;
 754         property->id      = CONNMAN_PROPERTY_ID_INVALID;
 755         property->name    = g_strdup(name);
 756         property->type    = DBUS_TYPE_ARRAY;
 757         property->subtype = type;
 758
 759         DBG("name %s type %d value %p", name, type, value);
 760
 761         switch (type) {
 762         case DBUS_TYPE_BYTE:
 763                 property->value = g_try_malloc(len);
 764                 if (property->value != NULL) {
 765                         memcpy(property->value,
 766                                 *((const unsigned char **) value), len);
 767                         property->size = len;
 768                 }
 769                 break;
 770         }
 771
 772         __connman_element_lock(element);
 773         element->properties = g_slist_append(element->properties, property);
 774         __connman_element_unlock(element);
 775
 776         return 0;
 777 }
 778
 779 static void *get_reference_value(struct connman_element *element,
 780                                                 enum connman_property_id id)
 781 {
 782         GSList *list;
 783
 784         DBG("element %p name %s", element, element->name);
 785
 786         for (list = element->properties; list; list = list->next) {
 787                 struct connman_property *property = list->data;
 788
 789                 if (property->id != id)
 790                         continue;
 791
 792                 if (!(property->flags & CONNMAN_PROPERTY_FLAG_REFERENCE))
 793                         return property->value;
 794         }
 795
 796         if (element->parent == NULL)
 797                 return NULL;
 798
 799         return get_reference_value(element->parent, id);
 800 }
 801
 802 static void set_reference_properties(struct connman_element *element)
 803 {
 804         GSList *list;
 805
 806         DBG("element %p name %s", element, element->name);
 807
 808         for (list = element->properties; list; list = list->next) {
 809                 struct connman_property *property = list->data;
 810
 811                 if (!(property->flags & CONNMAN_PROPERTY_FLAG_REFERENCE))
 812                         continue;
 813
 814                 property->value = get_reference_value(element->parent,
 815                                                                 property->id);
 816         }
 817 }
 818
 819 static struct connman_property *create_property(struct connman_element *element,
 820                                                 enum connman_property_id id)
 821 {
 822         struct connman_property *property;
 823         GSList *list;
 824
 825         DBG("element %p name %s", element, element->name);
 826
 827         __connman_element_lock(element);
 828
 829         for (list = element->properties; list; list = list->next) {
 830                 property = list->data;
 831
 832                 if (property->id == id)
 833                         goto unlock;
 834         }
 835
 836         property = g_try_new0(struct connman_property, 1);
 837         if (property == NULL)
 838                 goto unlock;
 839
 840         property->flags = CONNMAN_PROPERTY_FLAG_REFERENCE;
 841         property->id    = id;
 842         property->name  = g_strdup(propid2name(id));
 843         property->type  = propid2type(id);
 844
 845         if (property->name == NULL) {
 846                 g_free(property);
 847                 property = NULL;
 848                 goto unlock;
 849         }
 850
 851         element->properties = g_slist_append(element->properties, property);
 852
 853 unlock:
 854         __connman_element_unlock(element);
 855
 856         return property;
 857 }
 858
 859 static void create_default_properties(struct connman_element *element)
 860 {
 861         struct connman_property *property;
 862         int i;
 863
 864         DBG("element %p name %s", element, element->name);
 865
 866         for (i = 0; propid_table[i].name; i++) {
 867                 DBG("property %s", propid_table[i].name);
 868
 869                 property = create_property(element, propid_table[i].id);
 870
 871                 property->flags &= ~CONNMAN_PROPERTY_FLAG_REFERENCE;
 872
 873                 if (propid_table[i].type != DBUS_TYPE_STRING)
 874                         continue;
 875
 876                 if (propid_table[i].value)
 877                         property->value = g_strdup(propid_table[i].value);
 878                 else
 879                         property->value = g_strdup("");
 880         }
 881 }
 882
 883 static int define_properties_valist(struct connman_element *element,
 884                                                                 va_list args)
 885 {
 886         enum connman_property_id id;
 887
 888         DBG("element %p name %s", element, element->name);
 889
 890         id = va_arg(args, enum connman_property_id);
 891
 892         while (id != CONNMAN_PROPERTY_ID_INVALID) {
 893
 894                 DBG("property %d", id);
 895
 896                 create_property(element, id);
 897
 898                 id = va_arg(args, enum connman_property_id);
 899         }
 900
 901         return 0;
 902 }
 903
 904 /**
 905  * connman_element_define_properties:
 906  * @element: an element
 907  * @varargs: list of property identifiers
 908  *
 909  * Define the valid properties for an element.
 910  *
 911  * Returns: %0 on success
 912  */
 913 int connman_element_define_properties(struct connman_element *element, ...)
 914 {
 915         va_list args;
 916         int err;
 917
 918         DBG("element %p name %s", element, element->name);
 919
 920         va_start(args, element);
 921
 922         err = define_properties_valist(element, args);
 923
 924         va_end(args);
 925
 926         return err;
 927 }
 928
 929 int connman_element_create_property(struct connman_element *element,
 930                                                 const char *name, int type)
 931 {
 932         return -EIO;
 933 }
 934
 935 int connman_element_set_property(struct connman_element *element,
 936                                 enum connman_property_id id, const void *value)
 937 {
 938         switch (id) {
 939         case CONNMAN_PROPERTY_ID_IPV4_ADDRESS:
 940                 __connman_element_lock(element);
 941                 g_free(element->ipv4.address);
 942                 element->ipv4.address = g_strdup(*((const char **) value));
 943                 __connman_element_unlock(element);
 944                 break;
 945         case CONNMAN_PROPERTY_ID_IPV4_NETMASK:
 946                 __connman_element_lock(element);
 947                 g_free(element->ipv4.netmask);
 948                 element->ipv4.netmask = g_strdup(*((const char **) value));
 949                 __connman_element_unlock(element);
 950                 break;
 951         case CONNMAN_PROPERTY_ID_IPV4_GATEWAY:
 952                 __connman_element_lock(element);
 953                 g_free(element->ipv4.gateway);
 954                 element->ipv4.gateway = g_strdup(*((const char **) value));
 955                 __connman_element_unlock(element);
 956                 break;
 957         case CONNMAN_PROPERTY_ID_IPV4_BROADCAST:
 958                 __connman_element_lock(element);
 959                 g_free(element->ipv4.broadcast);
 960                 element->ipv4.broadcast = g_strdup(*((const char **) value));
 961                 __connman_element_unlock(element);
 962                 break;
 963         case CONNMAN_PROPERTY_ID_IPV4_NAMESERVER:
 964                 __connman_element_lock(element);
 965                 g_free(element->ipv4.nameserver);
 966                 element->ipv4.nameserver = g_strdup(*((const char **) value));
 967                 __connman_element_unlock(element);
 968                 break;
 969         default:
 970                 return -EINVAL;
 971         }
 972
 973         return 0;
 974 }
 975
 976 int connman_element_get_value(struct connman_element *element,
 977                                 enum connman_property_id id, void *value)
 978 {
 979         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 980                 return -EINVAL;
 981
 982         switch (id) {
 983         case CONNMAN_PROPERTY_ID_IPV4_METHOD:
 984                 if (element->ipv4.method == CONNMAN_IPV4_METHOD_UNKNOWN)
 985                         return connman_element_get_value(element->parent,
 986                                                                 id, value);
 987                 __connman_element_lock(element);
 988                 *((const char **) value) = __connman_ipv4_method2string(element->ipv4.method);
 989                 __connman_element_unlock(element);
 990                 break;
 991         case CONNMAN_PROPERTY_ID_IPV4_ADDRESS:
 992                 if (element->ipv4.address == NULL)
 993                         return connman_element_get_value(element->parent,
 994                                                                 id, value);
 995                 __connman_element_lock(element);
 996                 *((char **) value) = element->ipv4.address;
 997                 __connman_element_unlock(element);
 998                 break;
 999         case CONNMAN_PROPERTY_ID_IPV4_NETMASK:
1000                 if (element->ipv4.netmask == NULL)
1001                         return connman_element_get_value(element->parent,
1002                                                                 id, value);
1003                 __connman_element_lock(element);
1004                 *((char **) value) = element->ipv4.netmask;
1005                 __connman_element_unlock(element);
1006                 break;
1007         case CONNMAN_PROPERTY_ID_IPV4_GATEWAY:
1008                 if (element->ipv4.gateway == NULL)
1009                         return connman_element_get_value(element->parent,
1010                                                                 id, value);
1011                 __connman_element_lock(element);
1012                 *((char **) value) = element->ipv4.gateway;
1013                 __connman_element_unlock(element);
1014                 break;
1015         case CONNMAN_PROPERTY_ID_IPV4_BROADCAST:
1016                 if (element->ipv4.broadcast == NULL)
1017                         return connman_element_get_value(element->parent,
1018                                                                 id, value);
1019                 __connman_element_lock(element);
1020                 *((char **) value) = element->ipv4.broadcast;
1021                 __connman_element_unlock(element);
1022                 break;
1023         case CONNMAN_PROPERTY_ID_IPV4_NAMESERVER:
1024                 if (element->ipv4.nameserver == NULL)
1025                         return connman_element_get_value(element->parent,
1026                                                                 id, value);
1027                 __connman_element_lock(element);
1028                 *((char **) value) = element->ipv4.nameserver;
1029                 __connman_element_unlock(element);
1030                 break;
1031         default:
1032                 return -EINVAL;
1033         }
1034
1035         return 0;
1036 }
1037
1038 gboolean connman_element_get_static_property(struct connman_element *element,
1039                                                 const char *name, void *value)
1040 {
1041         GSList *list;
1042         gboolean found = FALSE;
1043
1044         DBG("element %p name %s", element, element->name);
1045
1046         __connman_element_lock(element);
1047
1048         for (list = element->properties; list; list = list->next) {
1049                 struct connman_property *property = list->data;
1050
1051                 if (!(property->flags & CONNMAN_PROPERTY_FLAG_STATIC))
1052                         continue;
1053
1054                 if (g_str_equal(property->name, name) == TRUE) {
1055                         switch (property->type) {
1056                         case DBUS_TYPE_STRING:
1057                                 *((char **) value) = property->value;
1058                                 found = TRUE;
1059                                 break;
1060                         case DBUS_TYPE_BYTE:
1061                                 memcpy(value, property->value, 1);
1062                                 found = TRUE;
1063                                 break;
1064                         }
1065                         break;
1066                 }
1067         }
1068
1069         __connman_element_unlock(element);
1070
1071         if (found == FALSE && element->parent != NULL)
1072                 return connman_element_get_static_property(element->parent,
1073                                                                 name, value);
1074
1075         return found;
1076 }
1077
1078 gboolean connman_element_get_static_array_property(struct connman_element *element,
1079                                         const char *name, void *value, int *len)
1080 {
1081         GSList *list;
1082         gboolean found = FALSE;
1083
1084         DBG("element %p name %s", element, element->name);
1085
1086         __connman_element_lock(element);
1087
1088         for (list = element->properties; list; list = list->next) {
1089                 struct connman_property *property = list->data;
1090
1091                 if (!(property->flags & CONNMAN_PROPERTY_FLAG_STATIC))
1092                         continue;
1093
1094                 if (g_str_equal(property->name, name) == TRUE) {
1095                         *((char **) value) = property->value;
1096                         *len = property->size;
1097                         found = TRUE;
1098                         break;
1099                 }
1100         }
1101
1102         __connman_element_unlock(element);
1103
1104         return found;
1105 }
1106
1107 gboolean connman_element_match_static_property(struct connman_element *element,
1108                                         const char *name, const void *value)
1109 {
1110         GSList *list;
1111         gboolean result = FALSE;
1112
1113         DBG("element %p name %s", element, element->name);
1114
1115         __connman_element_lock(element);
1116
1117         for (list = element->properties; list; list = list->next) {
1118                 struct connman_property *property = list->data;
1119
1120                 if (!(property->flags & CONNMAN_PROPERTY_FLAG_STATIC))
1121                         continue;
1122
1123                 if (g_str_equal(property->name, name) == FALSE)
1124                         continue;
1125
1126                 if (property->type == DBUS_TYPE_STRING)
1127                         result = g_str_equal(property->value,
1128                                                 *((const char **) value));
1129
1130                 if (result == TRUE)
1131                         break;
1132         }
1133
1134         __connman_element_unlock(element);
1135
1136         return result;
1137 }
1138
1139 static void append_connections(DBusMessageIter *entry)
1140 {
1141         DBusMessageIter value, iter;
1142         const char *key = "Connections";
1143
1144         dbus_message_iter_append_basic(entry, DBUS_TYPE_STRING, &key);
1145
1146         dbus_message_iter_open_container(entry, DBUS_TYPE_VARIANT,
1147                 DBUS_TYPE_ARRAY_AS_STRING DBUS_TYPE_OBJECT_PATH_AS_STRING,
1148                                                                 &value);
1149
1150         dbus_message_iter_open_container(&value, DBUS_TYPE_ARRAY,
1151                                 DBUS_TYPE_OBJECT_PATH_AS_STRING, &iter);
1152         __connman_element_list(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION, &iter);
1153         dbus_message_iter_close_container(&value, &iter);
1154
1155         dbus_message_iter_close_container(entry, &value);
1156 }
1157
1158 static void emit_connections_signal(DBusConnection *conn)
1159 {
1160         DBusMessage *signal;
1161         DBusMessageIter entry;
1162
1163         DBG("conn %p", conn);
1164
1165         signal = dbus_message_new_signal(CONNMAN_MANAGER_PATH,
1166                                 CONNMAN_MANAGER_INTERFACE, "PropertyChanged");
1167         if (signal == NULL)
1168                 return;
1169
1170         dbus_message_iter_init_append(signal, &entry);
1171
1172         append_connections(&entry);
1173
1174         g_dbus_send_message(conn, signal);
1175 }
1176
1177 static void append_state(DBusMessageIter *entry, const char *state)
1178 {
1179         DBusMessageIter value;
1180         const char *key = "State";
1181
1182         dbus_message_iter_append_basic(entry, DBUS_TYPE_STRING, &key);
1183
1184         dbus_message_iter_open_container(entry, DBUS_TYPE_VARIANT,
1185                                         DBUS_TYPE_STRING_AS_STRING, &value);
1186         dbus_message_iter_append_basic(&value, DBUS_TYPE_STRING, &state);
1187         dbus_message_iter_close_container(entry, &value);
1188 }
1189
1190 static void emit_state_change(DBusConnection *conn, const char *state)
1191 {
1192         DBusMessage *signal;
1193         DBusMessageIter entry;
1194
1195         DBG("conn %p", conn);
1196
1197         signal = dbus_message_new_signal(CONNMAN_MANAGER_PATH,
1198                                 CONNMAN_MANAGER_INTERFACE, "PropertyChanged");
1199         if (signal == NULL)
1200                 return;
1201
1202         dbus_message_iter_init_append(signal, &entry);
1203
1204         append_state(&entry, state);
1205
1206         g_dbus_send_message(conn, signal);
1207 }
1208
1209 static void probe_element(struct connman_element *element)
1210 {
1211         GSList *list;
1212
1213         DBG("element %p name %s", element, element->name);
1214
1215         for (list = driver_list; list; list = list->next) {
1216                 struct connman_driver *driver = list->data;
1217
1218                 if (match_driver(element, driver) == FALSE)
1219                         continue;
1220
1221                 DBG("driver %p name %s", driver, driver->name);
1222
1223                 if (driver->probe(element) == 0) {
1224                         __connman_element_lock(element);
1225                         element->driver = driver;
1226                         __connman_element_unlock(element);
1227                         break;
1228                 }
1229         }
1230 }
1231
1232 static void register_element(gpointer data, gpointer user_data)
1233 {
1234         struct connman_element *element = data;
1235         const gchar *basepath;
1236         GNode *node;
1237
1238         __connman_element_lock(element);
1239
1240         if (element->parent) {
1241                 node = g_node_find(element_root, G_PRE_ORDER,
1242                                         G_TRAVERSE_ALL, element->parent);
1243                 basepath = element->parent->path;
1244         } else {
1245                 element->parent = element_root->data;
1246
1247                 node = element_root;
1248                 basepath = "";
1249         }
1250
1251         element->path = g_strdup_printf("%s/%s", basepath, element->name);
1252
1253         set_reference_properties(element);
1254
1255         __connman_element_unlock(element);
1256
1257         DBG("element %p path %s", element, element->path);
1258
1259         g_node_append_data(node, element);
1260
1261         if (element->type == CONNMAN_ELEMENT_TYPE_CONNECTION) {
1262                 emit_connections_signal(connection);
1263                 emit_state_change(connection, "online");
1264         }
1265
1266         emit_element_signal(connection, "ElementAdded", element);
1267
1268         if (started == FALSE)
1269                 return;
1270
1271         probe_element(element);
1272 }
1273
1274 /**
1275  * connman_element_register:
1276  * @element: the element to register
1277  * @parent: the parent to register the element with
1278  *
1279  * Register an element with the core. It will be register under the given
1280  * parent of if %NULL is provided under the root element.
1281  *
1282  * Returns: %0 on success
1283  */
1284 int connman_element_register(struct connman_element *element,
1285                                         struct connman_element *parent)
1286 {
1287         DBG("element %p name %s parent %p", element, element->name, parent);
1288
1289         if (element->devname == NULL)
1290                 element->devname = g_strdup(element->name);
1291
1292         if (device_filter && element->type == CONNMAN_ELEMENT_TYPE_DEVICE) {
1293                 if (g_pattern_match_simple(device_filter,
1294                                                 element->devname) == FALSE) {
1295                         DBG("ignoring %s [%s] device", element->name,
1296                                                         element->devname);
1297                         return -EPERM;
1298                 }
1299         }
1300
1301         if (connman_element_ref(element) == NULL)
1302                 return -EINVAL;
1303
1304         __connman_element_lock(element);
1305
1306         if (element->name == NULL) {
1307                 element->name = g_strdup(type2string(element->type));
1308                 if (element->name == NULL) {
1309                         __connman_element_unlock(element);
1310                         return -EINVAL;
1311                 }
1312         }
1313
1314         if (element->type == CONNMAN_ELEMENT_TYPE_DHCP)
1315                 element->ipv4.method = CONNMAN_IPV4_METHOD_DHCP;
1316
1317         element->parent = parent;
1318
1319         __connman_element_unlock(element);
1320
1321         register_element(element, NULL);
1322
1323         return 0;
1324 }
1325
1326 static gboolean remove_element(GNode *node, gpointer user_data)
1327 {
1328         struct connman_element *element = node->data;
1329         struct connman_element *root = user_data;
1330
1331         DBG("element %p name %s", element, element->name);
1332
1333         if (element == root)
1334                 return FALSE;
1335
1336         if (node != NULL)
1337                 g_node_unlink(node);
1338
1339         if (element->driver) {
1340                 if (element->driver->remove)
1341                         element->driver->remove(element);
1342
1343                 __connman_element_lock(element);
1344                 element->driver = NULL;
1345                 __connman_element_unlock(element);
1346         }
1347
1348         if (node != NULL)
1349                 g_node_destroy(node);
1350
1351         if (element->type == CONNMAN_ELEMENT_TYPE_CONNECTION) {
1352                 if (__connman_element_count(NULL,
1353                                         CONNMAN_ELEMENT_TYPE_CONNECTION) == 0)
1354                         emit_state_change(connection, "offline");
1355                 emit_connections_signal(connection);
1356         }
1357
1358         emit_element_signal(connection, "ElementRemoved", element);
1359
1360         connman_element_unref(element);
1361
1362         return FALSE;
1363 }
1364
1365 void connman_element_unregister(struct connman_element *element)
1366 {
1367         GNode *node;
1368
1369         DBG("element %p name %s", element, element->name);
1370
1371         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
1372
1373         if (node != NULL)
1374                 g_node_traverse(node, G_POST_ORDER,
1375                                 G_TRAVERSE_ALL, -1, remove_element, NULL);
1376 }
1377
1378 void connman_element_unregister_children(struct connman_element *element)
1379 {
1380         GNode *node;
1381
1382         DBG("element %p name %s", element, element->name);
1383
1384         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
1385
1386         if (node != NULL)
1387                 g_node_traverse(node, G_POST_ORDER,
1388                                 G_TRAVERSE_ALL, -1, remove_element, element);
1389 }
1390
1391 static gboolean update_element(GNode *node, gpointer user_data)
1392 {
1393         struct connman_element *element = node->data;
1394
1395         DBG("element %p name %s", element, element->name);
1396
1397         if (element->driver && element->driver->update)
1398                 element->driver->update(element);
1399
1400         emit_element_signal(connection, "ElementUpdated", element);
1401
1402         return FALSE;
1403 }
1404
1405 void connman_element_update(struct connman_element *element)
1406 {
1407         GNode *node;
1408
1409         DBG("element %p name %s", element, element->name);
1410
1411         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
1412
1413         if (node != NULL)
1414                 g_node_traverse(node, G_PRE_ORDER,
1415                                 G_TRAVERSE_ALL, -1, update_element, element);
1416 }
1417
1418 int connman_element_set_enabled(struct connman_element *element,
1419                                                         gboolean enabled)
1420 {
1421         if (element->enabled == enabled)
1422                 return 0;
1423
1424         element->enabled = enabled;
1425
1426         return 0;
1427 }
1428
1429 int __connman_element_init(DBusConnection *conn, const char *device)
1430 {
1431         struct connman_element *element;
1432
1433         DBG("conn %p", conn);
1434
1435         connection = dbus_connection_ref(conn);
1436         if (connection == NULL)
1437                 return -EIO;
1438
1439         device_filter = g_strdup(device);
1440
1441         element = connman_element_create("root");
1442
1443         element->path = g_strdup("/");
1444         element->type = CONNMAN_ELEMENT_TYPE_ROOT;
1445
1446         create_default_properties(element);
1447
1448         element_root = g_node_new(element);
1449
1450         __connman_network_init();
1451         __connman_device_init();
1452
1453         return 0;
1454 }
1455
1456 static gboolean probe_node(GNode *node, gpointer data)
1457 {
1458         struct connman_element *element = node->data;
1459
1460         DBG("element %p name %s", element, element->name);
1461
1462         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
1463                 return FALSE;
1464
1465         if (element->driver)
1466                 return FALSE;
1467
1468         probe_element(element);
1469
1470         return FALSE;
1471 }
1472
1473 void __connman_element_start(void)
1474 {
1475         DBG("");
1476
1477         g_node_traverse(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
1478                                                         probe_node, NULL);
1479
1480         started = TRUE;
1481
1482         __connman_storage_init_device();
1483
1484         __connman_connection_init();
1485         __connman_ipv4_init();
1486         __connman_detect_init();
1487 }
1488
1489 void __connman_element_stop(void)
1490 {
1491         DBG("");
1492
1493         __connman_detect_cleanup();
1494         __connman_ipv4_cleanup();
1495         __connman_connection_cleanup();
1496 }
1497
1498 static gboolean free_driver(GNode *node, gpointer data)
1499 {
1500         struct connman_element *element = node->data;
1501
1502         DBG("element %p name %s", element, element->name);
1503
1504         if (element->driver) {
1505                 if (element->driver->remove)
1506                         element->driver->remove(element);
1507
1508                 __connman_element_lock(element);
1509                 element->driver = NULL;
1510                 __connman_element_unlock(element);
1511         }
1512
1513         return FALSE;
1514 }
1515
1516 static gboolean free_node(GNode *node, gpointer data)
1517 {
1518         struct connman_element *element = node->data;
1519
1520         DBG("element %p name %s", element, element->name);
1521
1522         if (g_node_depth(node) > 1)
1523                 connman_element_unregister(element);
1524
1525         return FALSE;
1526 }
1527
1528 void __connman_element_cleanup(void)
1529 {
1530         DBG("");
1531
1532         __connman_device_cleanup();
1533         __connman_network_cleanup();
1534
1535         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
1536                                                         free_driver, NULL);
1537
1538         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
1539                                                         free_node, NULL);
1540
1541         g_node_destroy(element_root);
1542         element_root = NULL;
1543
1544         g_free(device_filter);
1545
1546         dbus_connection_unref(connection);
1547 }