src/element.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  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 static gchar **nodevice_filter = NULL;
  41
  42 static gboolean started = FALSE;
  43
  44 static const char *type2string(enum connman_element_type type)
  45 {
  46         switch (type) {
  47         case CONNMAN_ELEMENT_TYPE_UNKNOWN:
  48                 return "unknown";
  49         case CONNMAN_ELEMENT_TYPE_ROOT:
  50                 return "root";
  51         case CONNMAN_ELEMENT_TYPE_PROFILE:
  52                 return "profile";
  53         case CONNMAN_ELEMENT_TYPE_DEVICE:
  54                 return "device";
  55         case CONNMAN_ELEMENT_TYPE_NETWORK:
  56                 return "network";
  57         case CONNMAN_ELEMENT_TYPE_SERVICE:
  58                 return "service";
  59         case CONNMAN_ELEMENT_TYPE_IPV4:
  60                 return "ipv4";
  61         case CONNMAN_ELEMENT_TYPE_IPV6:
  62                 return "ipv6";
  63         case CONNMAN_ELEMENT_TYPE_DHCP:
  64                 return "dhcp";
  65         case CONNMAN_ELEMENT_TYPE_BOOTP:
  66                 return "bootp";
  67         case CONNMAN_ELEMENT_TYPE_ZEROCONF:
  68                 return "zeroconf";
  69         case CONNMAN_ELEMENT_TYPE_CONNECTION:
  70                 return "connection";
  71         case CONNMAN_ELEMENT_TYPE_VENDOR:
  72                 return "vendor";
  73         }
  74
  75         return NULL;
  76 }
  77
  78 struct foreach_data {
  79         enum connman_element_type type;
  80         element_cb_t callback;
  81         gpointer user_data;
  82 };
  83
  84 static gboolean foreach_callback(GNode *node, gpointer user_data)
  85 {
  86         struct connman_element *element = node->data;
  87         struct foreach_data *data = user_data;
  88
  89         DBG("element %p name %s", element, element->name);
  90
  91         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
  92                 return FALSE;
  93
  94         if (data->type != CONNMAN_ELEMENT_TYPE_UNKNOWN &&
  95                                         data->type != element->type)
  96                 return FALSE;
  97
  98         if (data->callback)
  99                 data->callback(element, data->user_data);
 100
 101         return FALSE;
 102 }
 103
 104 void __connman_element_foreach(struct connman_element *element,
 105                                 enum connman_element_type type,
 106                                 element_cb_t callback, gpointer user_data)
 107 {
 108         struct foreach_data data = { type, callback, user_data };
 109         GNode *node;
 110
 111         DBG("");
 112
 113         if (element != NULL) {
 114                 node = g_node_find(element_root, G_PRE_ORDER,
 115                                                 G_TRAVERSE_ALL, element);
 116                 if (node == NULL)
 117                         return;
 118         } else
 119                 node = element_root;
 120
 121         g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 122                                                 foreach_callback, &data);
 123 }
 124
 125 struct append_filter {
 126         enum connman_element_type type;
 127         DBusMessageIter *iter;
 128 };
 129
 130 static gboolean append_path(GNode *node, gpointer user_data)
 131 {
 132         struct connman_element *element = node->data;
 133         struct append_filter *filter = user_data;
 134
 135         DBG("element %p name %s", element, element->name);
 136
 137         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 138                 return FALSE;
 139
 140         if (filter->type != CONNMAN_ELEMENT_TYPE_UNKNOWN &&
 141                                         filter->type != element->type)
 142                 return FALSE;
 143
 144         if (filter->type == CONNMAN_ELEMENT_TYPE_DEVICE &&
 145                         __connman_device_has_driver(element->device) == FALSE)
 146                 return FALSE;
 147
 148         if (filter->type == CONNMAN_ELEMENT_TYPE_NETWORK &&
 149                         __connman_network_has_driver(element->network) == FALSE)
 150                 return FALSE;
 151
 152         dbus_message_iter_append_basic(filter->iter,
 153                                 DBUS_TYPE_OBJECT_PATH, &element->path);
 154
 155         return FALSE;
 156 }
 157
 158 void __connman_element_list(struct connman_element *element,
 159                                         enum connman_element_type type,
 160                                                         DBusMessageIter *iter)
 161 {
 162         struct append_filter filter = { type, iter };
 163         GNode *node;
 164
 165         DBG("");
 166
 167         if (element != NULL) {
 168                 node = g_node_find(element_root, G_PRE_ORDER,
 169                                                 G_TRAVERSE_ALL, element);
 170                 if (node == NULL)
 171                         return;
 172         } else
 173                 node = element_root;
 174
 175         g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 176                                                 append_path, &filter);
 177 }
 178
 179 static struct connman_network *get_network(struct connman_element *element)
 180 {
 181         if (element->type == CONNMAN_ELEMENT_TYPE_NETWORK &&
 182                                                 element->network != NULL)
 183                 return element->network;
 184
 185         if (element->parent == NULL)
 186                 return NULL;
 187
 188         return get_network(element->parent);
 189 }
 190
 191 struct connman_service *__connman_element_get_service(struct connman_element *element)
 192 {
 193         struct connman_service *service = NULL;
 194         struct connman_network *network;
 195         struct connman_device *device;
 196         enum connman_device_type type;
 197
 198         device = __connman_element_get_device(element);
 199         if (device == NULL)
 200                 return NULL;
 201
 202         type = connman_device_get_type(device);
 203
 204         switch (type) {
 205         case CONNMAN_DEVICE_TYPE_UNKNOWN:
 206         case CONNMAN_DEVICE_TYPE_VENDOR:
 207         case CONNMAN_DEVICE_TYPE_GPS:
 208         case CONNMAN_DEVICE_TYPE_GADGET:
 209                 break;
 210         case CONNMAN_DEVICE_TYPE_ETHERNET:
 211         case CONNMAN_DEVICE_TYPE_WIFI:
 212         case CONNMAN_DEVICE_TYPE_WIMAX:
 213         case CONNMAN_DEVICE_TYPE_BLUETOOTH:
 214         case CONNMAN_DEVICE_TYPE_CELLULAR:
 215                 network = get_network(element);
 216                 if (network == NULL)
 217                         return NULL;
 218                 service = __connman_service_lookup_from_network(network);
 219                 break;
 220         }
 221
 222         return service;
 223 }
 224
 225 struct connman_device *__connman_element_get_device(struct connman_element *element)
 226 {
 227         if (element->type == CONNMAN_ELEMENT_TYPE_DEVICE &&
 228                                                 element->device != NULL)
 229                 return element->device;
 230
 231         if (element->parent == NULL)
 232                 return NULL;
 233
 234         return __connman_element_get_device(element->parent);
 235 }
 236
 237 struct find_data {
 238         enum connman_service_type type;
 239         struct connman_device *device;
 240         connman_bool_t error;
 241 };
 242
 243 static gboolean find_device(GNode *node, gpointer user_data)
 244 {
 245         struct connman_element *element = node->data;
 246         struct find_data *data = user_data;
 247
 248         if (element->type != CONNMAN_ELEMENT_TYPE_DEVICE)
 249                 return FALSE;
 250
 251         if (element->device == NULL)
 252                 return FALSE;
 253
 254         if (data->type != __connman_device_get_service_type(element->device))
 255                 return FALSE;
 256
 257         data->device = element->device;
 258
 259         return TRUE;
 260 }
 261
 262 struct connman_device *__connman_element_find_device(enum connman_service_type type)
 263 {
 264         struct find_data data = { .type = type, .device = NULL };
 265
 266         g_node_traverse(element_root, G_PRE_ORDER,
 267                                 G_TRAVERSE_ALL, -1, find_device, &data);
 268
 269         return data.device;
 270 }
 271
 272 static gboolean request_scan(GNode *node, gpointer user_data)
 273 {
 274         struct connman_element *element = node->data;
 275         struct find_data *data = user_data;
 276         enum connman_service_type type;
 277
 278         if (element->type != CONNMAN_ELEMENT_TYPE_DEVICE)
 279                 return FALSE;
 280
 281         if (element->device == NULL)
 282                 return FALSE;
 283
 284         type = __connman_device_get_service_type(element->device);
 285
 286         switch (type) {
 287         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 288         case CONNMAN_SERVICE_TYPE_SYSTEM:
 289         case CONNMAN_SERVICE_TYPE_ETHERNET:
 290         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 291         case CONNMAN_SERVICE_TYPE_CELLULAR:
 292         case CONNMAN_SERVICE_TYPE_GPS:
 293         case CONNMAN_SERVICE_TYPE_VPN:
 294         case CONNMAN_SERVICE_TYPE_GADGET:
 295                 return FALSE;
 296         case CONNMAN_SERVICE_TYPE_WIFI:
 297         case CONNMAN_SERVICE_TYPE_WIMAX:
 298                 if (data->type != CONNMAN_SERVICE_TYPE_UNKNOWN &&
 299                                                         data->type != type)
 300                         return FALSE;
 301                 break;
 302         }
 303
 304         __connman_device_scan(element->device);
 305
 306         return FALSE;
 307 }
 308
 309 int __connman_element_request_scan(enum connman_service_type type)
 310 {
 311         struct find_data data = { .type = type, .device = NULL };
 312
 313         g_node_traverse(element_root, G_PRE_ORDER,
 314                                 G_TRAVERSE_ALL, -1, request_scan, &data);
 315
 316         return 0;
 317 }
 318
 319 static gboolean enable_technology(GNode *node, gpointer user_data)
 320 {
 321         struct connman_element *element = node->data;
 322         struct find_data *data = user_data;
 323         enum connman_service_type type;
 324         int err;
 325
 326         if (element->type != CONNMAN_ELEMENT_TYPE_DEVICE)
 327                 return FALSE;
 328
 329         if (element->device == NULL)
 330                 return FALSE;
 331
 332         type = __connman_device_get_service_type(element->device);
 333
 334         switch (type) {
 335         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 336         case CONNMAN_SERVICE_TYPE_SYSTEM:
 337         case CONNMAN_SERVICE_TYPE_GPS:
 338         case CONNMAN_SERVICE_TYPE_VPN:
 339         case CONNMAN_SERVICE_TYPE_GADGET:
 340                 return FALSE;
 341         case CONNMAN_SERVICE_TYPE_ETHERNET:
 342         case CONNMAN_SERVICE_TYPE_WIFI:
 343         case CONNMAN_SERVICE_TYPE_WIMAX:
 344         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 345         case CONNMAN_SERVICE_TYPE_CELLULAR:
 346                 if (data->type != CONNMAN_SERVICE_TYPE_UNKNOWN &&
 347                                                         data->type != type)
 348                         return FALSE;
 349                 break;
 350         }
 351
 352         err = __connman_device_enable_persistent(element->device);
 353         if (err == 0 || (err < 0 && err == -EINPROGRESS))
 354                 data->error = FALSE;
 355
 356         return FALSE;
 357 }
 358
 359 int __connman_element_enable_technology(enum connman_service_type type)
 360 {
 361         struct find_data data = { .type = type, .device = NULL, .error = TRUE };
 362
 363         g_node_traverse(element_root, G_PRE_ORDER,
 364                                 G_TRAVERSE_ALL, -1, enable_technology, &data);
 365
 366         if (data.error == TRUE)
 367                 return -ENODEV;
 368
 369         return 0;
 370 }
 371
 372 static gboolean disable_technology(GNode *node, gpointer user_data)
 373 {
 374         struct connman_element *element = node->data;
 375         struct find_data *data = user_data;
 376         enum connman_service_type type;
 377         int err;
 378
 379         if (element->type != CONNMAN_ELEMENT_TYPE_DEVICE)
 380                 return FALSE;
 381
 382         if (element->device == NULL)
 383                 return FALSE;
 384
 385         type = __connman_device_get_service_type(element->device);
 386
 387         switch (type) {
 388         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 389         case CONNMAN_SERVICE_TYPE_SYSTEM:
 390         case CONNMAN_SERVICE_TYPE_GPS:
 391         case CONNMAN_SERVICE_TYPE_VPN:
 392         case CONNMAN_SERVICE_TYPE_GADGET:
 393                 return FALSE;
 394         case CONNMAN_SERVICE_TYPE_ETHERNET:
 395         case CONNMAN_SERVICE_TYPE_WIFI:
 396         case CONNMAN_SERVICE_TYPE_WIMAX:
 397         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 398         case CONNMAN_SERVICE_TYPE_CELLULAR:
 399                 if (data->type != CONNMAN_SERVICE_TYPE_UNKNOWN &&
 400                                                         data->type != type)
 401                         return FALSE;
 402                 break;
 403         }
 404
 405         err = __connman_device_disable_persistent(element->device);
 406         if (err == 0 || (err < 0 && err == -EINPROGRESS))
 407                 data->error = FALSE;
 408
 409         return FALSE;
 410 }
 411
 412 int __connman_element_disable_technology(enum connman_service_type type)
 413 {
 414         struct find_data data = { .type = type, .device = NULL, .error = TRUE };
 415
 416         g_node_traverse(element_root, G_PRE_ORDER,
 417                                 G_TRAVERSE_ALL, -1, disable_technology, &data);
 418
 419         if (data.error == TRUE)
 420                 return -ENODEV;
 421
 422         return 0;
 423 }
 424
 425 static gint compare_priority(gconstpointer a, gconstpointer b)
 426 {
 427         const struct connman_driver *driver1 = a;
 428         const struct connman_driver *driver2 = b;
 429
 430         return driver2->priority - driver1->priority;
 431 }
 432
 433 static gboolean match_driver(struct connman_element *element,
 434                                         struct connman_driver *driver)
 435 {
 436         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 437                 return FALSE;
 438
 439         if (element->type == driver->type ||
 440                         driver->type == CONNMAN_ELEMENT_TYPE_UNKNOWN)
 441                 return TRUE;
 442
 443         return FALSE;
 444 }
 445
 446 static gboolean probe_driver(GNode *node, gpointer data)
 447 {
 448         struct connman_element *element = node->data;
 449         struct connman_driver *driver = data;
 450
 451         DBG("element %p name %s", element, element->name);
 452
 453         if (!element->driver && match_driver(element, driver) == TRUE) {
 454                 if (driver->probe(element) < 0)
 455                         return FALSE;
 456
 457                 element->driver = driver;
 458         }
 459
 460         return FALSE;
 461 }
 462
 463 void __connman_driver_rescan(struct connman_driver *driver)
 464 {
 465         DBG("driver %p name %s", driver, driver->name);
 466
 467         if (!driver->probe)
 468                 return;
 469
 470         if (element_root != NULL)
 471                 g_node_traverse(element_root, G_PRE_ORDER,
 472                                 G_TRAVERSE_ALL, -1, probe_driver, driver);
 473 }
 474
 475 /**
 476  * connman_driver_register:
 477  * @driver: driver definition
 478  *
 479  * Register a new driver
 480  *
 481  * Returns: %0 on success
 482  */
 483 int connman_driver_register(struct connman_driver *driver)
 484 {
 485         DBG("driver %p name %s", driver, driver->name);
 486
 487         if (driver->type == CONNMAN_ELEMENT_TYPE_ROOT)
 488                 return -EINVAL;
 489
 490         if (!driver->probe)
 491                 return -EINVAL;
 492
 493         driver_list = g_slist_insert_sorted(driver_list, driver,
 494                                                         compare_priority);
 495
 496         if (started == FALSE)
 497                 return 0;
 498
 499         if (element_root != NULL)
 500                 g_node_traverse(element_root, G_PRE_ORDER,
 501                                 G_TRAVERSE_ALL, -1, probe_driver, driver);
 502
 503         return 0;
 504 }
 505
 506 static gboolean remove_driver(GNode *node, gpointer data)
 507 {
 508         struct connman_element *element = node->data;
 509         struct connman_driver *driver = data;
 510
 511         DBG("element %p name %s", element, element->name);
 512
 513         if (element->driver == driver) {
 514                 if (driver->remove)
 515                         driver->remove(element);
 516
 517                 element->driver = NULL;
 518         }
 519
 520         return FALSE;
 521 }
 522
 523 /**
 524  * connman_driver_unregister:
 525  * @driver: driver definition
 526  *
 527  * Remove a previously registered driver
 528  */
 529 void connman_driver_unregister(struct connman_driver *driver)
 530 {
 531         DBG("driver %p name %s", driver, driver->name);
 532
 533         driver_list = g_slist_remove(driver_list, driver);
 534
 535         if (element_root != NULL)
 536                 g_node_traverse(element_root, G_POST_ORDER,
 537                                 G_TRAVERSE_ALL, -1, remove_driver, driver);
 538 }
 539
 540 static void unregister_property(gpointer data)
 541 {
 542         struct connman_property *property = data;
 543
 544         DBG("property %p", property);
 545
 546         g_free(property->value);
 547         g_free(property);
 548 }
 549
 550 static void unregister_child(gpointer data)
 551 {
 552         struct connman_element *element = data;
 553
 554         DBG("element %p", element);
 555
 556         connman_element_unref(element);
 557 }
 558
 559 void __connman_element_initialize(struct connman_element *element)
 560 {
 561         DBG("element %p", element);
 562
 563         element->refcount = 1;
 564
 565         element->name    = NULL;
 566         element->type    = CONNMAN_ELEMENT_TYPE_UNKNOWN;
 567         element->state   = CONNMAN_ELEMENT_STATE_UNKNOWN;
 568         element->error   = CONNMAN_ELEMENT_ERROR_UNKNOWN;
 569         element->index   = -1;
 570         element->enabled = FALSE;
 571
 572         element->children = g_hash_table_new_full(g_str_hash, g_str_equal,
 573                                                 NULL, unregister_child);
 574
 575         element->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
 576                                                 g_free, unregister_property);
 577 }
 578
 579 /**
 580  * connman_element_create:
 581  * @name: element name
 582  *
 583  * Allocate a new element and assign the given #name to it. If the name
 584  * is #NULL, it will be later on created based on the element type.
 585  *
 586  * Returns: a newly-allocated #connman_element structure
 587  */
 588 struct connman_element *connman_element_create(const char *name)
 589 {
 590         struct connman_element *element;
 591
 592         element = g_try_new0(struct connman_element, 1);
 593         if (element == NULL)
 594                 return NULL;
 595
 596         DBG("element %p", element);
 597
 598         __connman_element_initialize(element);
 599
 600         element->name = g_strdup(name);
 601
 602         return element;
 603 }
 604
 605 struct connman_element *connman_element_ref(struct connman_element *element)
 606 {
 607         DBG("element %p name %s refcount %d", element, element->name,
 608                                 g_atomic_int_get(&element->refcount) + 1);
 609
 610         g_atomic_int_inc(&element->refcount);
 611
 612         return element;
 613 }
 614
 615 static void free_properties(struct connman_element *element)
 616 {
 617         DBG("element %p name %s", element, element->name);
 618
 619         g_hash_table_destroy(element->properties);
 620         element->properties = NULL;
 621 }
 622
 623 static void free_children(struct connman_element *element)
 624 {
 625         DBG("element %p name %s", element, element->name);
 626
 627         g_hash_table_destroy(element->children);
 628         element->children = NULL;
 629 }
 630
 631 void connman_element_unref(struct connman_element *element)
 632 {
 633         DBG("element %p name %s refcount %d", element, element->name,
 634                                 g_atomic_int_get(&element->refcount) - 1);
 635
 636         if (g_atomic_int_dec_and_test(&element->refcount) == TRUE) {
 637                 if (element->destruct)
 638                         element->destruct(element);
 639                 free_children(element);
 640                 free_properties(element);
 641                 g_free(element->hostname);
 642                 g_free(element->domainname);
 643                 g_free(element->ipv4.address);
 644                 g_free(element->ipv4.netmask);
 645                 g_free(element->ipv4.gateway);
 646                 g_free(element->ipv4.network);
 647                 g_free(element->ipv4.broadcast);
 648                 g_free(element->ipv4.nameserver);
 649                 g_free(element->ipv4.timeserver);
 650                 g_free(element->ipv4.pac);
 651                 g_free(element->ipv6.address);
 652                 g_free(element->ipv6.network);
 653                 g_free(element->devname);
 654                 g_free(element->path);
 655                 g_free(element->name);
 656                 g_free(element);
 657         }
 658 }
 659
 660 static int set_static_property(struct connman_element *element,
 661                                 const char *name, int type, const void *value)
 662 {
 663         struct connman_property *property;
 664
 665         DBG("element %p name %s", element, element->name);
 666
 667         if (type != DBUS_TYPE_STRING && type != DBUS_TYPE_BYTE)
 668                 return -EINVAL;
 669
 670         property = g_try_new0(struct connman_property, 1);
 671         if (property == NULL)
 672                 return -ENOMEM;
 673
 674         property->id   = CONNMAN_PROPERTY_ID_INVALID;
 675         property->type = type;
 676
 677         DBG("name %s type %d value %p", name, type, value);
 678
 679         switch (type) {
 680         case DBUS_TYPE_STRING:
 681                 property->value = g_strdup(*((const char **) value));
 682                 break;
 683         case DBUS_TYPE_BOOLEAN:
 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         g_hash_table_replace(element->properties, g_strdup(name), property);
 692
 693         return 0;
 694 }
 695
 696 static int set_static_array_property(struct connman_element *element,
 697                         const char *name, int type, const void *value, int len)
 698 {
 699         struct connman_property *property;
 700
 701         DBG("element %p name %s", element, element->name);
 702
 703         if (type != DBUS_TYPE_BYTE)
 704                 return -EINVAL;
 705
 706         property = g_try_new0(struct connman_property, 1);
 707         if (property == NULL)
 708                 return -ENOMEM;
 709
 710         property->id      = CONNMAN_PROPERTY_ID_INVALID;
 711         property->type    = DBUS_TYPE_ARRAY;
 712         property->subtype = type;
 713
 714         DBG("name %s type %d value %p", name, type, value);
 715
 716         switch (type) {
 717         case DBUS_TYPE_BYTE:
 718                 property->value = g_try_malloc(len);
 719                 if (property->value != NULL) {
 720                         memcpy(property->value,
 721                                 *((const unsigned char **) value), len);
 722                         property->size = len;
 723                 }
 724                 break;
 725         }
 726
 727         g_hash_table_replace(element->properties, g_strdup(name), property);
 728
 729         return 0;
 730 }
 731
 732 int connman_element_get_value(struct connman_element *element,
 733                                 enum connman_property_id id, void *value)
 734 {
 735         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 736                 return -EINVAL;
 737
 738         switch (id) {
 739         case CONNMAN_PROPERTY_ID_HOSTNAME:
 740                 if (element->hostname == NULL)
 741                         return connman_element_get_value(element->parent,
 742                                                                 id, value);
 743                 *((char **) value) = element->hostname;
 744                 break;
 745         case CONNMAN_PROPERTY_ID_DOMAINNAME:
 746                 if (element->domainname == NULL)
 747                         return connman_element_get_value(element->parent,
 748                                                                 id, value);
 749                 *((char **) value) = element->domainname;
 750                 break;
 751         case CONNMAN_PROPERTY_ID_IPV4_METHOD:
 752                 if (element->ipv4.method == CONNMAN_IPCONFIG_METHOD_UNKNOWN)
 753                         return connman_element_get_value(element->parent,
 754                                                                 id, value);
 755                 *((const char **) value) = __connman_ipconfig_method2string(element->ipv4.method);
 756                 break;
 757         case CONNMAN_PROPERTY_ID_IPV4_ADDRESS:
 758                 if (element->ipv4.address == NULL)
 759                         return connman_element_get_value(element->parent,
 760                                                                 id, value);
 761                 *((char **) value) = element->ipv4.address;
 762                 break;
 763         case CONNMAN_PROPERTY_ID_IPV4_PEER:
 764                 if (element->ipv4.peer == NULL)
 765                         return connman_element_get_value(element->parent,
 766                                                                 id, value);
 767                 *((char **) value) = element->ipv4.peer;
 768                 break;
 769         case CONNMAN_PROPERTY_ID_IPV4_NETMASK:
 770                 if (element->ipv4.netmask == NULL)
 771                         return connman_element_get_value(element->parent,
 772                                                                 id, value);
 773                 *((char **) value) = element->ipv4.netmask;
 774                 break;
 775         case CONNMAN_PROPERTY_ID_IPV4_GATEWAY:
 776                 if (element->ipv4.gateway == NULL)
 777                         return connman_element_get_value(element->parent,
 778                                                                 id, value);
 779                 *((char **) value) = element->ipv4.gateway;
 780                 break;
 781         case CONNMAN_PROPERTY_ID_IPV4_BROADCAST:
 782                 if (element->ipv4.broadcast == NULL)
 783                         return connman_element_get_value(element->parent,
 784                                                                 id, value);
 785                 *((char **) value) = element->ipv4.broadcast;
 786                 break;
 787         case CONNMAN_PROPERTY_ID_IPV4_NAMESERVER:
 788                 if (element->ipv4.nameserver == NULL)
 789                         return connman_element_get_value(element->parent,
 790                                                                 id, value);
 791                 *((char **) value) = element->ipv4.nameserver;
 792                 break;
 793         case CONNMAN_PROPERTY_ID_IPV4_TIMESERVER:
 794                 if (element->ipv4.timeserver == NULL)
 795                         return connman_element_get_value(element->parent,
 796                                                                 id, value);
 797                 *((char **) value) = element->ipv4.timeserver;
 798                 break;
 799         case CONNMAN_PROPERTY_ID_IPV4_PAC:
 800                 if (element->ipv4.pac == NULL)
 801                         return connman_element_get_value(element->parent,
 802                                                                 id, value);
 803                 *((char **) value) = element->ipv4.pac;
 804                 break;
 805         case CONNMAN_PROPERTY_ID_IPV6_GATEWAY:
 806                 if (element->ipv6.gateway == NULL)
 807                         return connman_element_get_value(element->parent,
 808                                                                 id, value);
 809                 *((char **) value) = element->ipv6.gateway;
 810                 break;
 811
 812         default:
 813                 return -EINVAL;
 814         }
 815
 816         return 0;
 817 }
 818
 819 static gboolean get_static_property(struct connman_element *element,
 820                                                 const char *name, void *value)
 821 {
 822         struct connman_property *property;
 823         gboolean found = FALSE;
 824
 825         DBG("element %p name %s", element, element->name);
 826
 827         property = g_hash_table_lookup(element->properties, name);
 828         if (property != NULL) {
 829                 switch (property->type) {
 830                 case DBUS_TYPE_STRING:
 831                         *((char **) value) = property->value;
 832                         found = TRUE;
 833                         break;
 834                 case DBUS_TYPE_BOOLEAN:
 835                 case DBUS_TYPE_BYTE:
 836                         memcpy(value, property->value, 1);
 837                         found = TRUE;
 838                         break;
 839                 }
 840         }
 841
 842         if (found == FALSE && element->parent != NULL)
 843                 return get_static_property(element->parent, name, value);
 844
 845         return found;
 846 }
 847
 848 static gboolean get_static_array_property(struct connman_element *element,
 849                         const char *name, void *value, unsigned int *len)
 850 {
 851         struct connman_property *property;
 852         gboolean found = FALSE;
 853
 854         DBG("element %p name %s", element, element->name);
 855
 856         property = g_hash_table_lookup(element->properties, name);
 857         if (property != NULL) {
 858                 *((void **) value) = property->value;
 859                 *len = property->size;
 860                 found = TRUE;
 861         }
 862
 863         return found;
 864 }
 865
 866 /**
 867  * connman_element_set_string:
 868  * @element: element structure
 869  * @key: unique identifier
 870  * @value: string value
 871  *
 872  * Set string value for specific key
 873  */
 874 int connman_element_set_string(struct connman_element *element,
 875                                         const char *key, const char *value)
 876 {
 877         return set_static_property(element, key, DBUS_TYPE_STRING, &value);
 878 }
 879
 880 /**
 881  * connman_element_get_string:
 882  * @element: element structure
 883  * @key: unique identifier
 884  *
 885  * Get string value for specific key
 886  */
 887 const char *connman_element_get_string(struct connman_element *element,
 888                                                         const char *key)
 889 {
 890         const char *value;
 891
 892         if (get_static_property(element, key, &value) == FALSE)
 893                 return NULL;
 894
 895         return value;
 896 }
 897
 898 /**
 899  * connman_element_set_bool:
 900  * @element: element structure
 901  * @key: unique identifier
 902  * @value: boolean value
 903  *
 904  * Set boolean value for specific key
 905  */
 906 int connman_element_set_bool(struct connman_element *element,
 907                                         const char *key, connman_bool_t value)
 908 {
 909         return set_static_property(element, key, DBUS_TYPE_BOOLEAN, &value);
 910 }
 911
 912 /**
 913  * connman_element_get_bool:
 914  * @element: element structure
 915  * @key: unique identifier
 916  *
 917  * Get boolean value for specific key
 918  */
 919 connman_bool_t connman_element_get_bool(struct connman_element *element,
 920                                                         const char *key)
 921 {
 922         connman_bool_t value;
 923
 924         if (get_static_property(element, key, &value) == FALSE)
 925                 return FALSE;
 926
 927         return value;
 928 }
 929
 930 /**
 931  * connman_element_set_uint8:
 932  * @element: element structure
 933  * @key: unique identifier
 934  * @value: integer value
 935  *
 936  * Set integer value for specific key
 937  */
 938 int connman_element_set_uint8(struct connman_element *element,
 939                                         const char *key, connman_uint8_t value)
 940 {
 941         return set_static_property(element, key, DBUS_TYPE_BYTE, &value);
 942 }
 943
 944 /**
 945  * connman_element_get_uint8:
 946  * @element: element structure
 947  * @key: unique identifier
 948  *
 949  * Get integer value for specific key
 950  */
 951 connman_uint8_t connman_element_get_uint8(struct connman_element *element,
 952                                                         const char *key)
 953 {
 954         connman_uint8_t value;
 955
 956         if (get_static_property(element, key, &value) == FALSE)
 957                 return 0;
 958
 959         return value;
 960 }
 961
 962 /**
 963  * connman_element_set_blob:
 964  * @element: element structure
 965  * @key: unique identifier
 966  * @data: blob data
 967  * @size: blob size
 968  *
 969  * Set binary blob value for specific key
 970  */
 971 int connman_element_set_blob(struct connman_element *element,
 972                         const char *key, const void *data, unsigned int size)
 973 {
 974         return set_static_array_property(element, key,
 975                                                 DBUS_TYPE_BYTE, &data, size);
 976 }
 977
 978 /**
 979  * connman_element_get_blob:
 980  * @element: element structure
 981  * @key: unique identifier
 982  * @size: pointer to blob size
 983  *
 984  * Get binary blob value for specific key
 985  */
 986 const void *connman_element_get_blob(struct connman_element *element,
 987                                         const char *key, unsigned int *size)
 988 {
 989         void *value;
 990
 991         if (get_static_array_property(element, key, &value, size) == FALSE)
 992                 return NULL;
 993
 994         return value;
 995 }
 996
 997 static void probe_element(struct connman_element *element)
 998 {
 999         GSList *list;
1000
1001         DBG("element %p name %s", element, element->name);
1002
1003         for (list = driver_list; list; list = list->next) {
1004                 struct connman_driver *driver = list->data;
1005
1006                 if (match_driver(element, driver) == FALSE)
1007                         continue;
1008
1009                 DBG("driver %p name %s", driver, driver->name);
1010
1011                 if (driver->probe(element) == 0) {
1012                         element->driver = driver;
1013                         break;
1014                 }
1015         }
1016 }
1017
1018 static void register_element(gpointer data, gpointer user_data)
1019 {
1020         struct connman_element *element = data;
1021         const gchar *basepath;
1022         GNode *node;
1023
1024         if (element->parent) {
1025                 node = g_node_find(element_root, G_PRE_ORDER,
1026                                         G_TRAVERSE_ALL, element->parent);
1027                 basepath = element->parent->path;
1028         } else {
1029                 element->parent = element_root->data;
1030
1031                 node = element_root;
1032                 basepath = CONNMAN_PATH "/device";
1033         }
1034
1035         element->path = g_strdup_printf("%s/%s", basepath, element->name);
1036
1037         if (node == NULL) {
1038                 connman_error("Element registration for %s failed",
1039                                                         element->path);
1040                 return;
1041         }
1042
1043         DBG("element %p path %s", element, element->path);
1044
1045         g_node_append_data(node, element);
1046
1047         if (started == FALSE)
1048                 return;
1049
1050         probe_element(element);
1051 }
1052
1053 gboolean __connman_element_device_isfiltered(const char *devname)
1054 {
1055         char **pattern;
1056
1057         if (device_filter == NULL)
1058                 goto nodevice;
1059
1060         for (pattern = device_filter; *pattern; pattern++) {
1061                 if (g_pattern_match_simple(*pattern, devname) == FALSE) {
1062                         DBG("ignoring device %s (match)", devname);
1063                         return TRUE;
1064                 }
1065         }
1066
1067 nodevice:
1068         if (nodevice_filter == NULL)
1069                 return FALSE;
1070
1071         for (pattern = nodevice_filter; *pattern; pattern++) {
1072                 if (g_pattern_match_simple(*pattern, devname) == TRUE) {
1073                         DBG("ignoring device %s (no match)", devname);
1074                         return TRUE;
1075                 }
1076         }
1077
1078         return FALSE;
1079 }
1080
1081 /**
1082  * connman_element_register:
1083  * @element: the element to register
1084  * @parent: the parent to register the element with
1085  *
1086  * Register an element with the core. It will be register under the given
1087  * parent of if %NULL is provided under the root element.
1088  *
1089  * Returns: %0 on success
1090  */
1091 int connman_element_register(struct connman_element *element,
1092                                         struct connman_element *parent)
1093 {
1094         DBG("element %p name %s parent %p", element, element->name, parent);
1095
1096         if (element->devname == NULL)
1097                 element->devname = g_strdup(element->name);
1098
1099         if (element->type != CONNMAN_ELEMENT_TYPE_DEVICE)
1100                 goto setup;
1101
1102         if (__connman_element_device_isfiltered(element->devname) == TRUE)
1103                 return -EPERM;
1104
1105 setup:
1106         if (connman_element_ref(element) == NULL)
1107                 return -EINVAL;
1108
1109         if (element->name == NULL) {
1110                 element->name = g_strdup(type2string(element->type));
1111                 if (element->name == NULL) {
1112                         return -EINVAL;
1113                 }
1114         }
1115
1116         if (element->type == CONNMAN_ELEMENT_TYPE_DHCP)
1117                 element->ipv4.method = CONNMAN_IPCONFIG_METHOD_DHCP;
1118
1119         element->parent = parent;
1120
1121         register_element(element, NULL);
1122
1123         return 0;
1124 }
1125
1126 static gboolean remove_element(GNode *node, gpointer user_data)
1127 {
1128         struct connman_element *element = node->data;
1129         struct connman_element *root = user_data;
1130
1131         DBG("element %p name %s", element, element->name);
1132
1133         if (element == root)
1134                 return FALSE;
1135
1136         g_node_unlink(node);
1137
1138         if (element->driver) {
1139                 if (element->driver->remove)
1140                         element->driver->remove(element);
1141
1142                 element->driver = NULL;
1143         }
1144
1145         g_node_destroy(node);
1146
1147         connman_element_unref(element);
1148
1149         return FALSE;
1150 }
1151
1152 struct unregister_type {
1153         struct connman_element *root;
1154         enum connman_element_type type;
1155 };
1156
1157 static gboolean remove_element_type(GNode *node, gpointer user_data)
1158 {
1159         struct unregister_type *children_type = user_data;
1160         struct connman_element *root = children_type->root;
1161         struct connman_element *element = node->data;
1162         enum connman_element_type type = children_type->type;
1163
1164         DBG("element %p name %s", element, element->name);
1165
1166         if (element == root)
1167                 return FALSE;
1168
1169         if(element->type != type)
1170                 return FALSE;
1171
1172         g_node_unlink(node);
1173
1174         if (element->driver) {
1175                 if (element->driver->remove)
1176                         element->driver->remove(element);
1177
1178                 element->driver = NULL;
1179         }
1180
1181         g_node_destroy(node);
1182
1183         connman_element_unref(element);
1184
1185         return FALSE;
1186 }
1187
1188
1189 void connman_element_unregister(struct connman_element *element)
1190 {
1191         GNode *node;
1192
1193         DBG("element %p name %s", element, element->name);
1194
1195         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
1196
1197         if (node != NULL)
1198                 g_node_traverse(node, G_POST_ORDER,
1199                                 G_TRAVERSE_ALL, -1, remove_element, NULL);
1200 }
1201
1202 void connman_element_unregister_children(struct connman_element *element)
1203 {
1204         GNode *node;
1205
1206         DBG("element %p name %s", element, element->name);
1207
1208         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
1209
1210         if (node != NULL)
1211                 g_node_traverse(node, G_POST_ORDER,
1212                                 G_TRAVERSE_ALL, -1, remove_element, element);
1213 }
1214
1215 void connman_element_unregister_children_type(struct connman_element *element, enum connman_element_type type)
1216 {
1217         GNode *node;
1218
1219         DBG("element %p name %s", element, element->name);
1220
1221         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
1222
1223         if (node != NULL) {
1224                 struct unregister_type children_type;
1225
1226                 children_type.root = element;
1227                 children_type.type = type;
1228                 g_node_traverse(node, G_POST_ORDER,
1229                                 G_TRAVERSE_ALL, -1, remove_element_type, &children_type);
1230         }
1231 }
1232
1233
1234 static gboolean update_element(GNode *node, gpointer user_data)
1235 {
1236         struct connman_element *element = node->data;
1237
1238         DBG("element %p name %s", element, element->name);
1239
1240         if (element->driver && element->driver->update)
1241                 element->driver->update(element);
1242
1243         return FALSE;
1244 }
1245
1246 void connman_element_update(struct connman_element *element)
1247 {
1248         GNode *node;
1249
1250         DBG("element %p name %s", element, element->name);
1251
1252         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
1253
1254         if (node != NULL)
1255                 g_node_traverse(node, G_PRE_ORDER,
1256                                 G_TRAVERSE_ALL, -1, update_element, element);
1257 }
1258
1259 int connman_element_set_enabled(struct connman_element *element,
1260                                                         gboolean enabled)
1261 {
1262         if (element->enabled == enabled)
1263                 return 0;
1264
1265         element->enabled = enabled;
1266
1267         connman_element_update(element);
1268
1269         return 0;
1270 }
1271
1272 static enum connman_service_error convert_error(enum connman_element_error error)
1273 {
1274         switch (error) {
1275         case CONNMAN_ELEMENT_ERROR_UNKNOWN:
1276         case CONNMAN_ELEMENT_ERROR_FAILED:
1277                 break;
1278         case CONNMAN_ELEMENT_ERROR_DHCP_FAILED:
1279                 return CONNMAN_SERVICE_ERROR_DHCP_FAILED;
1280         case CONNMAN_ELEMENT_ERROR_CONNECT_FAILED:
1281                 return CONNMAN_SERVICE_ERROR_CONNECT_FAILED;
1282         }
1283
1284         return CONNMAN_SERVICE_ERROR_UNKNOWN;
1285 }
1286
1287 /**
1288  * connman_element_set_error:
1289  * @element: element structure
1290  * @error: error identifier
1291  *
1292  * Set error state and specific error identifier
1293  */
1294 void connman_element_set_error(struct connman_element *element,
1295                                         enum connman_element_error error)
1296 {
1297         struct connman_service *service;
1298
1299         DBG("element %p error %d", element, error);
1300
1301         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
1302                 return;
1303
1304         element->state = CONNMAN_ELEMENT_STATE_ERROR;
1305         element->error = error;
1306
1307         if (element->driver && element->driver->change)
1308                 element->driver->change(element);
1309
1310         service = __connman_element_get_service(element);
1311         __connman_service_indicate_error(service, convert_error(error));
1312 }
1313
1314 void __connman_element_set_driver(struct connman_element *element)
1315 {
1316         GSList *list;
1317
1318         DBG("element %p name %s driver %p", element, element->name,
1319                                                 element->driver);
1320
1321         if (element->driver)
1322                 return;
1323
1324         for (list = driver_list; list; list = list->next) {
1325                 struct connman_driver *driver = list->data;
1326
1327                 if (match_driver(element, driver) == FALSE)
1328                         continue;
1329
1330                 element->driver = driver;
1331
1332                 break;
1333         }
1334 }
1335
1336 int __connman_element_init(const char *device, const char *nodevice)
1337 {
1338         struct connman_element *element;
1339
1340         DBG("");
1341
1342         connection = connman_dbus_get_connection();
1343         if (connection == NULL)
1344                 return -EIO;
1345
1346         if (device)
1347                 device_filter = g_strsplit(device, ",", -1);
1348
1349         if (nodevice)
1350                 nodevice_filter = g_strsplit(nodevice, ",", -1);
1351
1352         element = connman_element_create("root");
1353
1354         element->path = g_strdup("/");
1355         element->type = CONNMAN_ELEMENT_TYPE_ROOT;
1356
1357         element_root = g_node_new(element);
1358
1359         __connman_technology_init();
1360         __connman_notifier_init();
1361         __connman_location_init();
1362         __connman_service_init();
1363         __connman_provider_init();
1364         __connman_network_init();
1365         __connman_device_init();
1366
1367         return 0;
1368 }
1369
1370 static gboolean probe_node(GNode *node, gpointer data)
1371 {
1372         struct connman_element *element = node->data;
1373
1374         DBG("element %p name %s", element, element->name);
1375
1376         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
1377                 return FALSE;
1378
1379         if (element->driver)
1380                 return FALSE;
1381
1382         probe_element(element);
1383
1384         return FALSE;
1385 }
1386
1387 void __connman_element_start(void)
1388 {
1389         DBG("");
1390
1391         __connman_storage_init_profile();
1392
1393         g_node_traverse(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
1394                                                         probe_node, NULL);
1395
1396         started = TRUE;
1397
1398         __connman_rtnl_start();
1399
1400         __connman_connection_init();
1401         __connman_ipv4_init();
1402         __connman_dhcp_init();
1403         __connman_wpad_init();
1404         __connman_wispr_init();
1405
1406         __connman_rfkill_init();
1407 }
1408
1409 void __connman_element_stop(void)
1410 {
1411         DBG("");
1412
1413         __connman_rfkill_cleanup();
1414
1415         __connman_wispr_cleanup();
1416         __connman_wpad_cleanup();
1417         __connman_dhcp_cleanup();
1418         __connman_ipv4_cleanup();
1419         __connman_provider_cleanup();
1420         __connman_connection_cleanup();
1421 }
1422
1423 static gboolean free_driver(GNode *node, gpointer data)
1424 {
1425         struct connman_element *element = node->data;
1426
1427         DBG("element %p name %s", element, element->name);
1428
1429         if (element->driver) {
1430                 if (element->driver->remove)
1431                         element->driver->remove(element);
1432
1433                 element->driver = NULL;
1434         }
1435
1436         return FALSE;
1437 }
1438
1439 static gboolean free_node(GNode *node, gpointer data)
1440 {
1441         struct connman_element *element = node->data;
1442
1443         DBG("element %p name %s", element, element->name);
1444
1445         if (g_node_depth(node) > 1)
1446                 connman_element_unregister(element);
1447
1448         return FALSE;
1449 }
1450
1451 void __connman_element_cleanup(void)
1452 {
1453         DBG("");
1454
1455         __connman_device_cleanup();
1456         __connman_network_cleanup();
1457         __connman_service_cleanup();
1458         __connman_location_cleanup();
1459         __connman_notifier_cleanup();
1460         __connman_technology_cleanup();
1461
1462         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
1463                                                         free_driver, NULL);
1464
1465         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
1466                                                         free_node, NULL);
1467
1468         connman_element_unref(element_root->data);
1469
1470         g_node_destroy(element_root);
1471         element_root = NULL;
1472
1473         g_strfreev(nodevice_filter);
1474         g_strfreev(device_filter);
1475
1476         if (connection == NULL)
1477                 return;
1478
1479         dbus_connection_unref(connection);
1480 }