git.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 const char *type2string(enum connman_element_type type)
  44 {
  45         switch (type) {
  46         case CONNMAN_ELEMENT_TYPE_UNKNOWN:
  47                 return "unknown";
  48         case CONNMAN_ELEMENT_TYPE_ROOT:
  49                 return "root";
  50         case CONNMAN_ELEMENT_TYPE_PROFILE:
  51                 return "profile";
  52         case CONNMAN_ELEMENT_TYPE_DEVICE:
  53                 return "device";
  54         case CONNMAN_ELEMENT_TYPE_NETWORK:
  55                 return "network";
  56         case CONNMAN_ELEMENT_TYPE_SERVICE:
  57                 return "service";
  58         case CONNMAN_ELEMENT_TYPE_PPP:
  59                 return "ppp";
  60         case CONNMAN_ELEMENT_TYPE_IPV4:
  61                 return "ipv4";
  62         case CONNMAN_ELEMENT_TYPE_IPV6:
  63                 return "ipv6";
  64         case CONNMAN_ELEMENT_TYPE_DHCP:
  65                 return "dhcp";
  66         case CONNMAN_ELEMENT_TYPE_BOOTP:
  67                 return "bootp";
  68         case CONNMAN_ELEMENT_TYPE_ZEROCONF:
  69                 return "zeroconf";
  70         case CONNMAN_ELEMENT_TYPE_CONNECTION:
  71                 return "connection";
  72         case CONNMAN_ELEMENT_TYPE_VENDOR:
  73                 return "vendor";
  74         }
  75
  76         return NULL;
  77 }
  78
  79 const char *__connman_ipv4_method2string(enum connman_ipv4_method method)
  80 {
  81         switch (method) {
  82         case CONNMAN_IPV4_METHOD_UNKNOWN:
  83                 return "unknown";
  84         case CONNMAN_IPV4_METHOD_OFF:
  85                 return "off";
  86         case CONNMAN_IPV4_METHOD_STATIC:
  87                 return "static";
  88         case CONNMAN_IPV4_METHOD_DHCP:
  89                 return "dhcp";
  90         }
  91
  92         return "unknown";
  93 }
  94
  95 enum connman_ipv4_method __connman_ipv4_string2method(const char *method)
  96 {
  97         if (strcasecmp(method, "off") == 0)
  98                 return CONNMAN_IPV4_METHOD_OFF;
  99         else if (strcasecmp(method, "static") == 0)
 100                 return CONNMAN_IPV4_METHOD_STATIC;
 101         else if (strcasecmp(method, "dhcp") == 0)
 102                 return CONNMAN_IPV4_METHOD_DHCP;
 103         else
 104                 return CONNMAN_IPV4_METHOD_UNKNOWN;
 105 }
 106
 107 static void emit_element_signal(DBusConnection *conn, const char *member,
 108                                         struct connman_element *element)
 109 {
 110         DBusMessage *signal;
 111
 112         if (__connman_debug_enabled() == FALSE)
 113                 return;
 114
 115         DBG("conn %p member %s", conn, member);
 116
 117         if (element == NULL)
 118                 return;
 119
 120         signal = dbus_message_new_signal(element->path,
 121                                         CONNMAN_DEBUG_INTERFACE, member);
 122         if (signal == NULL)
 123                 return;
 124
 125         g_dbus_send_message(conn, signal);
 126 }
 127
 128 struct foreach_data {
 129         enum connman_element_type type;
 130         element_cb_t callback;
 131         gpointer user_data;
 132 };
 133
 134 static gboolean foreach_callback(GNode *node, gpointer user_data)
 135 {
 136         struct connman_element *element = node->data;
 137         struct foreach_data *data = user_data;
 138
 139         DBG("element %p name %s", element, element->name);
 140
 141         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 142                 return FALSE;
 143
 144         if (data->type != CONNMAN_ELEMENT_TYPE_UNKNOWN &&
 145                                         data->type != element->type)
 146                 return FALSE;
 147
 148         if (data->callback)
 149                 data->callback(element, data->user_data);
 150
 151         return FALSE;
 152 }
 153
 154 void __connman_element_foreach(struct connman_element *element,
 155                                 enum connman_element_type type,
 156                                 element_cb_t callback, gpointer user_data)
 157 {
 158         struct foreach_data data = { type, callback, user_data };
 159         GNode *node;
 160
 161         DBG("");
 162
 163         if (element != NULL) {
 164                 node = g_node_find(element_root, G_PRE_ORDER,
 165                                                 G_TRAVERSE_ALL, element);
 166                 if (node == NULL)
 167                         return;
 168         } else
 169                 node = element_root;
 170
 171         g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 172                                                 foreach_callback, &data);
 173 }
 174
 175 struct append_filter {
 176         enum connman_element_type type;
 177         DBusMessageIter *iter;
 178 };
 179
 180 static gboolean append_path(GNode *node, gpointer user_data)
 181 {
 182         struct connman_element *element = node->data;
 183         struct append_filter *filter = user_data;
 184
 185         DBG("element %p name %s", element, element->name);
 186
 187         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 188                 return FALSE;
 189
 190         if (filter->type != CONNMAN_ELEMENT_TYPE_UNKNOWN &&
 191                                         filter->type != element->type)
 192                 return FALSE;
 193
 194         if (filter->type == CONNMAN_ELEMENT_TYPE_DEVICE &&
 195                         __connman_device_has_driver(element->device) == FALSE)
 196                 return FALSE;
 197
 198         if (filter->type == CONNMAN_ELEMENT_TYPE_NETWORK &&
 199                         __connman_network_has_driver(element->network) == FALSE)
 200                 return FALSE;
 201
 202         dbus_message_iter_append_basic(filter->iter,
 203                                 DBUS_TYPE_OBJECT_PATH, &element->path);
 204
 205         return FALSE;
 206 }
 207
 208 void __connman_element_list(struct connman_element *element,
 209                                         enum connman_element_type type,
 210                                                         DBusMessageIter *iter)
 211 {
 212         struct append_filter filter = { type, iter };
 213         GNode *node;
 214
 215         DBG("");
 216
 217         if (element != NULL) {
 218                 node = g_node_find(element_root, G_PRE_ORDER,
 219                                                 G_TRAVERSE_ALL, element);
 220                 if (node == NULL)
 221                         return;
 222         } else
 223                 node = element_root;
 224
 225         g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 226                                                 append_path, &filter);
 227 }
 228
 229 struct count_data {
 230         enum connman_element_type type;
 231         int count;
 232 };
 233
 234 static gboolean count_element(GNode *node, gpointer user_data)
 235 {
 236         struct connman_element *element = node->data;
 237         struct count_data *data = user_data;
 238
 239         DBG("element %p name %s", element, element->name);
 240
 241         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 242                 return FALSE;
 243
 244         if (data->type != CONNMAN_ELEMENT_TYPE_UNKNOWN &&
 245                                         data->type != element->type)
 246                 return FALSE;
 247
 248         data->count++;
 249
 250         return FALSE;
 251 }
 252
 253 int __connman_element_count(struct connman_element *element,
 254                                         enum connman_element_type type)
 255 {
 256         struct count_data data = { type, 0 };
 257         GNode *node;
 258
 259         DBG("");
 260
 261         if (element != NULL) {
 262                 node = g_node_find(element_root, G_PRE_ORDER,
 263                                                 G_TRAVERSE_ALL, element);
 264                 if (node == NULL)
 265                         return 0;
 266         } else
 267                 node = element_root;
 268
 269         g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 270                                                 count_element, &data);
 271
 272         return data.count;
 273 }
 274
 275 const char *__connman_element_get_device(struct connman_element *element)
 276 {
 277         if (element->type == CONNMAN_ELEMENT_TYPE_DEVICE &&
 278                                                 element->device != NULL)
 279                 return element->path;
 280
 281         if (element->parent == NULL)
 282                 return NULL;
 283
 284         return __connman_element_get_device(element->parent);
 285 }
 286
 287 const char *__connman_element_get_network(struct connman_element *element)
 288 {
 289         if (element->type == CONNMAN_ELEMENT_TYPE_NETWORK &&
 290                                                 element->network != NULL)
 291                 return element->path;
 292
 293         if (element->parent == NULL)
 294                 return NULL;
 295
 296         return __connman_element_get_network(element->parent);
 297 }
 298
 299 static gint compare_priority(gconstpointer a, gconstpointer b)
 300 {
 301         const struct connman_driver *driver1 = a;
 302         const struct connman_driver *driver2 = b;
 303
 304         return driver2->priority - driver1->priority;
 305 }
 306
 307 static gboolean match_driver(struct connman_element *element,
 308                                         struct connman_driver *driver)
 309 {
 310         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 311                 return FALSE;
 312
 313         if (element->type == driver->type ||
 314                         driver->type == CONNMAN_ELEMENT_TYPE_UNKNOWN)
 315                 return TRUE;
 316
 317         return FALSE;
 318 }
 319
 320 static gboolean probe_driver(GNode *node, gpointer data)
 321 {
 322         struct connman_element *element = node->data;
 323         struct connman_driver *driver = data;
 324
 325         DBG("element %p name %s", element, element->name);
 326
 327         if (!element->driver && match_driver(element, driver) == TRUE) {
 328                 if (driver->probe(element) < 0)
 329                         return FALSE;
 330
 331                 __connman_element_lock(element);
 332                 element->driver = driver;
 333                 __connman_element_unlock(element);
 334         }
 335
 336         return FALSE;
 337 }
 338
 339 void __connman_driver_rescan(struct connman_driver *driver)
 340 {
 341         DBG("driver %p name %s", driver, driver->name);
 342
 343         if (!driver->probe)
 344                 return;
 345
 346         if (element_root != NULL)
 347                 g_node_traverse(element_root, G_PRE_ORDER,
 348                                 G_TRAVERSE_ALL, -1, probe_driver, driver);
 349 }
 350
 351 /**
 352  * connman_driver_register:
 353  * @driver: driver definition
 354  *
 355  * Register a new driver
 356  *
 357  * Returns: %0 on success
 358  */
 359 int connman_driver_register(struct connman_driver *driver)
 360 {
 361         DBG("driver %p name %s", driver, driver->name);
 362
 363         if (driver->type == CONNMAN_ELEMENT_TYPE_ROOT)
 364                 return -EINVAL;
 365
 366         if (!driver->probe)
 367                 return -EINVAL;
 368
 369         driver_list = g_slist_insert_sorted(driver_list, driver,
 370                                                         compare_priority);
 371
 372         if (started == FALSE)
 373                 return 0;
 374
 375         if (element_root != NULL)
 376                 g_node_traverse(element_root, G_PRE_ORDER,
 377                                 G_TRAVERSE_ALL, -1, probe_driver, driver);
 378
 379         return 0;
 380 }
 381
 382 static gboolean remove_driver(GNode *node, gpointer data)
 383 {
 384         struct connman_element *element = node->data;
 385         struct connman_driver *driver = data;
 386
 387         DBG("element %p name %s", element, element->name);
 388
 389         if (element->driver == driver) {
 390                 if (driver->remove)
 391                         driver->remove(element);
 392
 393                 __connman_element_lock(element);
 394                 element->driver = NULL;
 395                 __connman_element_unlock(element);
 396         }
 397
 398         return FALSE;
 399 }
 400
 401 /**
 402  * connman_driver_unregister:
 403  * @driver: driver definition
 404  *
 405  * Remove a previously registered driver
 406  */
 407 void connman_driver_unregister(struct connman_driver *driver)
 408 {
 409         DBG("driver %p name %s", driver, driver->name);
 410
 411         driver_list = g_slist_remove(driver_list, driver);
 412
 413         if (element_root != NULL)
 414                 g_node_traverse(element_root, G_POST_ORDER,
 415                                 G_TRAVERSE_ALL, -1, remove_driver, driver);
 416 }
 417
 418 static void unregister_property(gpointer data)
 419 {
 420         struct connman_property *property = data;
 421
 422         DBG("property %p", property);
 423
 424         g_free(property->value);
 425         g_free(property);
 426 }
 427
 428 void __connman_element_initialize(struct connman_element *element)
 429 {
 430         DBG("element %p", element);
 431
 432         element->refcount = 1;
 433
 434         element->name    = NULL;
 435         element->type    = CONNMAN_ELEMENT_TYPE_UNKNOWN;
 436         element->state   = CONNMAN_ELEMENT_STATE_UNKNOWN;
 437         element->error   = CONNMAN_ELEMENT_ERROR_UNKNOWN;
 438         element->index   = -1;
 439         element->enabled = FALSE;
 440
 441         element->configuring = FALSE;
 442
 443         element->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
 444                                                 g_free, unregister_property);
 445 }
 446
 447 /**
 448  * connman_element_create:
 449  * @name: element name
 450  *
 451  * Allocate a new element and assign the given #name to it. If the name
 452  * is #NULL, it will be later on created based on the element type.
 453  *
 454  * Returns: a newly-allocated #connman_element structure
 455  */
 456 struct connman_element *connman_element_create(const char *name)
 457 {
 458         struct connman_element *element;
 459
 460         element = g_try_new0(struct connman_element, 1);
 461         if (element == NULL)
 462                 return NULL;
 463
 464         DBG("element %p", element);
 465
 466         __connman_element_initialize(element);
 467
 468         return element;
 469 }
 470
 471 struct connman_element *connman_element_ref(struct connman_element *element)
 472 {
 473         DBG("element %p name %s refcount %d", element, element->name,
 474                                 g_atomic_int_get(&element->refcount) + 1);
 475
 476         g_atomic_int_inc(&element->refcount);
 477
 478         return element;
 479 }
 480
 481 static void free_properties(struct connman_element *element)
 482 {
 483         DBG("element %p name %s", element, element->name);
 484
 485         __connman_element_lock(element);
 486
 487         g_hash_table_destroy(element->properties);
 488         element->properties = NULL;
 489
 490         __connman_element_unlock(element);
 491 }
 492
 493 void connman_element_unref(struct connman_element *element)
 494 {
 495         DBG("element %p name %s refcount %d", element, element->name,
 496                                 g_atomic_int_get(&element->refcount) - 1);
 497
 498         if (g_atomic_int_dec_and_test(&element->refcount) == TRUE) {
 499                 if (element->destruct)
 500                         element->destruct(element);
 501                 free_properties(element);
 502                 g_free(element->ipv4.address);
 503                 g_free(element->ipv4.netmask);
 504                 g_free(element->ipv4.gateway);
 505                 g_free(element->ipv4.network);
 506                 g_free(element->ipv4.broadcast);
 507                 g_free(element->ipv4.nameserver);
 508                 g_free(element->devname);
 509                 g_free(element->path);
 510                 g_free(element->name);
 511                 g_free(element);
 512         }
 513 }
 514
 515 static int set_static_property(struct connman_element *element,
 516                                 const char *name, int type, const void *value)
 517 {
 518         struct connman_property *property;
 519
 520         DBG("element %p name %s", element, element->name);
 521
 522         if (type != DBUS_TYPE_STRING && type != DBUS_TYPE_BYTE)
 523                 return -EINVAL;
 524
 525         property = g_try_new0(struct connman_property, 1);
 526         if (property == NULL)
 527                 return -ENOMEM;
 528
 529         property->id   = CONNMAN_PROPERTY_ID_INVALID;
 530         property->type = type;
 531
 532         DBG("name %s type %d value %p", name, type, value);
 533
 534         switch (type) {
 535         case DBUS_TYPE_STRING:
 536                 property->value = g_strdup(*((const char **) value));
 537                 break;
 538         case DBUS_TYPE_BYTE:
 539                 property->value = g_try_malloc(1);
 540                 if (property->value != NULL)
 541                         memcpy(property->value, value, 1);
 542                 break;
 543         }
 544
 545         __connman_element_lock(element);
 546
 547         g_hash_table_replace(element->properties, g_strdup(name), property);
 548
 549         __connman_element_unlock(element);
 550
 551         return 0;
 552 }
 553
 554 static int set_static_array_property(struct connman_element *element,
 555                         const char *name, int type, const void *value, int len)
 556 {
 557         struct connman_property *property;
 558
 559         DBG("element %p name %s", element, element->name);
 560
 561         if (type != DBUS_TYPE_BYTE)
 562                 return -EINVAL;
 563
 564         property = g_try_new0(struct connman_property, 1);
 565         if (property == NULL)
 566                 return -ENOMEM;
 567
 568         property->id      = CONNMAN_PROPERTY_ID_INVALID;
 569         property->type    = DBUS_TYPE_ARRAY;
 570         property->subtype = type;
 571
 572         DBG("name %s type %d value %p", name, type, value);
 573
 574         switch (type) {
 575         case DBUS_TYPE_BYTE:
 576                 property->value = g_try_malloc(len);
 577                 if (property->value != NULL) {
 578                         memcpy(property->value,
 579                                 *((const unsigned char **) value), len);
 580                         property->size = len;
 581                 }
 582                 break;
 583         }
 584
 585         __connman_element_lock(element);
 586
 587         g_hash_table_replace(element->properties, g_strdup(name), property);
 588
 589         __connman_element_unlock(element);
 590
 591         return 0;
 592 }
 593
 594 #if 0
 595 static int set_property(struct connman_element *element,
 596                                 enum connman_property_id id, const void *value)
 597 {
 598         switch (id) {
 599         case CONNMAN_PROPERTY_ID_IPV4_ADDRESS:
 600                 __connman_element_lock(element);
 601                 g_free(element->ipv4.address);
 602                 element->ipv4.address = g_strdup(*((const char **) value));
 603                 __connman_element_unlock(element);
 604                 break;
 605         case CONNMAN_PROPERTY_ID_IPV4_NETMASK:
 606                 __connman_element_lock(element);
 607                 g_free(element->ipv4.netmask);
 608                 element->ipv4.netmask = g_strdup(*((const char **) value));
 609                 __connman_element_unlock(element);
 610                 break;
 611         case CONNMAN_PROPERTY_ID_IPV4_GATEWAY:
 612                 __connman_element_lock(element);
 613                 g_free(element->ipv4.gateway);
 614                 element->ipv4.gateway = g_strdup(*((const char **) value));
 615                 __connman_element_unlock(element);
 616                 break;
 617         case CONNMAN_PROPERTY_ID_IPV4_BROADCAST:
 618                 __connman_element_lock(element);
 619                 g_free(element->ipv4.broadcast);
 620                 element->ipv4.broadcast = g_strdup(*((const char **) value));
 621                 __connman_element_unlock(element);
 622                 break;
 623         case CONNMAN_PROPERTY_ID_IPV4_NAMESERVER:
 624                 __connman_element_lock(element);
 625                 g_free(element->ipv4.nameserver);
 626                 element->ipv4.nameserver = g_strdup(*((const char **) value));
 627                 __connman_element_unlock(element);
 628                 break;
 629         default:
 630                 return -EINVAL;
 631         }
 632
 633         return 0;
 634 }
 635 #endif
 636
 637 int connman_element_get_value(struct connman_element *element,
 638                                 enum connman_property_id id, void *value)
 639 {
 640         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 641                 return -EINVAL;
 642
 643         switch (id) {
 644         case CONNMAN_PROPERTY_ID_IPV4_METHOD:
 645                 if (element->ipv4.method == CONNMAN_IPV4_METHOD_UNKNOWN)
 646                         return connman_element_get_value(element->parent,
 647                                                                 id, value);
 648                 __connman_element_lock(element);
 649                 *((const char **) value) = __connman_ipv4_method2string(element->ipv4.method);
 650                 __connman_element_unlock(element);
 651                 break;
 652         case CONNMAN_PROPERTY_ID_IPV4_ADDRESS:
 653                 if (element->ipv4.address == NULL)
 654                         return connman_element_get_value(element->parent,
 655                                                                 id, value);
 656                 __connman_element_lock(element);
 657                 *((char **) value) = element->ipv4.address;
 658                 __connman_element_unlock(element);
 659                 break;
 660         case CONNMAN_PROPERTY_ID_IPV4_NETMASK:
 661                 if (element->ipv4.netmask == NULL)
 662                         return connman_element_get_value(element->parent,
 663                                                                 id, value);
 664                 __connman_element_lock(element);
 665                 *((char **) value) = element->ipv4.netmask;
 666                 __connman_element_unlock(element);
 667                 break;
 668         case CONNMAN_PROPERTY_ID_IPV4_GATEWAY:
 669                 if (element->ipv4.gateway == NULL)
 670                         return connman_element_get_value(element->parent,
 671                                                                 id, value);
 672                 __connman_element_lock(element);
 673                 *((char **) value) = element->ipv4.gateway;
 674                 __connman_element_unlock(element);
 675                 break;
 676         case CONNMAN_PROPERTY_ID_IPV4_BROADCAST:
 677                 if (element->ipv4.broadcast == NULL)
 678                         return connman_element_get_value(element->parent,
 679                                                                 id, value);
 680                 __connman_element_lock(element);
 681                 *((char **) value) = element->ipv4.broadcast;
 682                 __connman_element_unlock(element);
 683                 break;
 684         case CONNMAN_PROPERTY_ID_IPV4_NAMESERVER:
 685                 if (element->ipv4.nameserver == NULL)
 686                         return connman_element_get_value(element->parent,
 687                                                                 id, value);
 688                 __connman_element_lock(element);
 689                 *((char **) value) = element->ipv4.nameserver;
 690                 __connman_element_unlock(element);
 691                 break;
 692         default:
 693                 return -EINVAL;
 694         }
 695
 696         return 0;
 697 }
 698
 699 static gboolean get_static_property(struct connman_element *element,
 700                                                 const char *name, void *value)
 701 {
 702         struct connman_property *property;
 703         gboolean found = FALSE;
 704
 705         DBG("element %p name %s", element, element->name);
 706
 707         __connman_element_lock(element);
 708
 709         property = g_hash_table_lookup(element->properties, name);
 710         if (property != NULL) {
 711                 switch (property->type) {
 712                 case DBUS_TYPE_STRING:
 713                         *((char **) value) = property->value;
 714                         found = TRUE;
 715                         break;
 716                 case DBUS_TYPE_BYTE:
 717                         memcpy(value, property->value, 1);
 718                         found = TRUE;
 719                         break;
 720                 }
 721         }
 722
 723         __connman_element_unlock(element);
 724
 725         if (found == FALSE && element->parent != NULL)
 726                 return get_static_property(element->parent, name, value);
 727
 728         return found;
 729 }
 730
 731 static gboolean get_static_array_property(struct connman_element *element,
 732                         const char *name, void *value, unsigned int *len)
 733 {
 734         struct connman_property *property;
 735         gboolean found = FALSE;
 736
 737         DBG("element %p name %s", element, element->name);
 738
 739         __connman_element_lock(element);
 740
 741         property = g_hash_table_lookup(element->properties, name);
 742         if (property != NULL) {
 743                 *((char **) value) = property->value;
 744                 *len = property->size;
 745                 found = TRUE;
 746         }
 747
 748         __connman_element_unlock(element);
 749
 750         return found;
 751 }
 752
 753 #if 0
 754 static gboolean match_static_property(struct connman_element *element,
 755                                         const char *name, const void *value)
 756 {
 757         struct connman_property *property;
 758         gboolean result = FALSE;
 759
 760         DBG("element %p name %s", element, element->name);
 761
 762         __connman_element_lock(element);
 763
 764         property = g_hash_table_lookup(element->properties, name);
 765         if (property != NULL) {
 766                 if (property->type == DBUS_TYPE_STRING)
 767                         result = g_str_equal(property->value,
 768                                                 *((const char **) value));
 769         }
 770
 771         __connman_element_unlock(element);
 772
 773         return result;
 774 }
 775 #endif
 776
 777 /**
 778  * connman_element_set_string:
 779  * @element: element structure
 780  * @key: unique identifier
 781  * @value: string value
 782  *
 783  * Set string value for specific key
 784  */
 785 int connman_element_set_string(struct connman_element *element,
 786                                         const char *key, const char *value)
 787 {
 788         return set_static_property(element, key, DBUS_TYPE_STRING, &value);
 789 }
 790
 791 /**
 792  * connman_element_get_string:
 793  * @element: element structure
 794  * @key: unique identifier
 795  *
 796  * Get string value for specific key
 797  */
 798 const char *connman_element_get_string(struct connman_element *element,
 799                                                         const char *key)
 800 {
 801         const char *value;
 802
 803         if (get_static_property(element, key, &value) == FALSE)
 804                 return NULL;
 805
 806         return value;
 807 }
 808
 809 /**
 810  * connman_element_set_uint8:
 811  * @element: element structure
 812  * @key: unique identifier
 813  * @value: integer value
 814  *
 815  * Set integer value for specific key
 816  */
 817 int connman_element_set_uint8(struct connman_element *element,
 818                                         const char *key, connman_uint8_t value)
 819 {
 820         return set_static_property(element, key, DBUS_TYPE_BYTE, &value);
 821 }
 822
 823 /**
 824  * connman_element_get_uint8:
 825  * @element: element structure
 826  * @key: unique identifier
 827  *
 828  * Get integer value for specific key
 829  */
 830 connman_uint8_t connman_element_get_uint8(struct connman_element *element,
 831                                                         const char *key)
 832 {
 833         connman_uint8_t value;
 834
 835         if (get_static_property(element, key, &value) == FALSE)
 836                 return 0;
 837
 838         return value;
 839 }
 840
 841 /**
 842  * connman_element_set_blob:
 843  * @element: element structure
 844  * @key: unique identifier
 845  * @data: blob data
 846  * @size: blob size
 847  *
 848  * Set binary blob value for specific key
 849  */
 850 int connman_element_set_blob(struct connman_element *element,
 851                         const char *key, const void *data, unsigned int size)
 852 {
 853         return set_static_array_property(element, key,
 854                                                 DBUS_TYPE_BYTE, &data, size);
 855 }
 856
 857 /**
 858  * connman_element_get_blob:
 859  * @element: element structure
 860  * @key: unique identifier
 861  * @size: pointer to blob size
 862  *
 863  * Get binary blob value for specific key
 864  */
 865 const void *connman_element_get_blob(struct connman_element *element,
 866                                         const char *key, unsigned int *size)
 867 {
 868         void *value;
 869
 870         if (get_static_array_property(element, key, &value, size) == FALSE)
 871                 return NULL;
 872
 873         return value;
 874 }
 875
 876 int __connman_element_append_ipv4(struct connman_element *element,
 877                                                 DBusMessageIter *dict)
 878 {
 879         const char *method = NULL;
 880         const char *address = NULL, *netmask = NULL, *gateway = NULL;
 881
 882         connman_element_get_value(element,
 883                                 CONNMAN_PROPERTY_ID_IPV4_METHOD, &method);
 884
 885         connman_element_get_value(element,
 886                                 CONNMAN_PROPERTY_ID_IPV4_ADDRESS, &address);
 887         connman_element_get_value(element,
 888                                 CONNMAN_PROPERTY_ID_IPV4_NETMASK, &netmask);
 889         connman_element_get_value(element,
 890                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 891
 892         if (method != NULL)
 893                 connman_dbus_dict_append_variant(dict, "IPv4.Method",
 894                                                 DBUS_TYPE_STRING, &method);
 895
 896         if (address != NULL)
 897                 connman_dbus_dict_append_variant(dict, "IPv4.Address",
 898                                                 DBUS_TYPE_STRING, &address);
 899
 900         if (netmask != NULL)
 901                 connman_dbus_dict_append_variant(dict, "IPv4.Netmask",
 902                                                 DBUS_TYPE_STRING, &netmask);
 903
 904         if (gateway != NULL)
 905                 connman_dbus_dict_append_variant(dict, "IPv4.Gateway",
 906                                                 DBUS_TYPE_STRING, &gateway);
 907
 908         return 0;
 909 }
 910
 911 int __connman_element_set_ipv4(struct connman_element *element,
 912                                 const char *name, DBusMessageIter *value)
 913 {
 914         int type;
 915
 916         type = dbus_message_iter_get_arg_type(value);
 917
 918         if (g_str_equal(name, "IPv4.Method") == TRUE) {
 919                 enum connman_ipv4_method method;
 920                 const char *str;
 921
 922                 if (type != DBUS_TYPE_STRING)
 923                         return -EINVAL;
 924
 925                 dbus_message_iter_get_basic(value, &str);
 926                 method = __connman_ipv4_string2method(str);
 927                 if (method == CONNMAN_IPV4_METHOD_UNKNOWN)
 928                         return -EINVAL;
 929
 930                 if (method == element->ipv4.method)
 931                         return -EALREADY;
 932
 933                 element->ipv4.method = method;
 934
 935                 connman_element_update(element);
 936         } else if (g_str_equal(name, "IPv4.Address") == TRUE) {
 937                 const char *address;
 938
 939                 if (type != DBUS_TYPE_STRING)
 940                         return -EINVAL;
 941
 942                 dbus_message_iter_get_basic(value, &address);
 943
 944                 g_free(element->ipv4.address);
 945                 element->ipv4.address = g_strdup(address);
 946
 947                 connman_element_update(element);
 948         } else if (g_str_equal(name, "IPv4.Netmask") == TRUE) {
 949                 const char *netmask;
 950
 951                 if (type != DBUS_TYPE_STRING)
 952                         return -EINVAL;
 953
 954                 dbus_message_iter_get_basic(value, &netmask);
 955
 956                 g_free(element->ipv4.netmask);
 957                 element->ipv4.netmask = g_strdup(netmask);
 958
 959                 connman_element_update(element);
 960         } else if (g_str_equal(name, "IPv4.Gateway") == TRUE) {
 961                 const char *gateway;
 962
 963                 if (type != DBUS_TYPE_STRING)
 964                         return -EINVAL;
 965
 966                 dbus_message_iter_get_basic(value, &gateway);
 967
 968                 g_free(element->ipv4.gateway);
 969                 element->ipv4.gateway = g_strdup(gateway);
 970
 971                 connman_element_update(element);
 972         }
 973
 974         return 0;
 975 }
 976
 977 static void append_state(DBusMessageIter *entry, const char *state)
 978 {
 979         DBusMessageIter value;
 980         const char *key = "State";
 981
 982         dbus_message_iter_append_basic(entry, DBUS_TYPE_STRING, &key);
 983
 984         dbus_message_iter_open_container(entry, DBUS_TYPE_VARIANT,
 985                                         DBUS_TYPE_STRING_AS_STRING, &value);
 986         dbus_message_iter_append_basic(&value, DBUS_TYPE_STRING, &state);
 987         dbus_message_iter_close_container(entry, &value);
 988 }
 989
 990 static void emit_state_change(DBusConnection *conn, const char *state)
 991 {
 992         DBusMessage *signal;
 993         DBusMessageIter entry;
 994
 995         DBG("conn %p", conn);
 996
 997         signal = dbus_message_new_signal(CONNMAN_MANAGER_PATH,
 998                                 CONNMAN_MANAGER_INTERFACE, "PropertyChanged");
 999         if (signal == NULL)
1000                 return;
1001
1002         dbus_message_iter_init_append(signal, &entry);
1003
1004         append_state(&entry, state);
1005
1006         g_dbus_send_message(conn, signal);
1007 }
1008
1009 static void probe_element(struct connman_element *element)
1010 {
1011         GSList *list;
1012
1013         DBG("element %p name %s", element, element->name);
1014
1015         for (list = driver_list; list; list = list->next) {
1016                 struct connman_driver *driver = list->data;
1017
1018                 if (match_driver(element, driver) == FALSE)
1019                         continue;
1020
1021                 DBG("driver %p name %s", driver, driver->name);
1022
1023                 if (driver->probe(element) == 0) {
1024                         __connman_element_lock(element);
1025                         element->driver = driver;
1026                         __connman_element_unlock(element);
1027                         break;
1028                 }
1029         }
1030 }
1031
1032 static void register_element(gpointer data, gpointer user_data)
1033 {
1034         struct connman_element *element = data;
1035         const gchar *basepath;
1036         GNode *node;
1037
1038         __connman_element_lock(element);
1039
1040         if (element->parent) {
1041                 node = g_node_find(element_root, G_PRE_ORDER,
1042                                         G_TRAVERSE_ALL, element->parent);
1043                 basepath = element->parent->path;
1044         } else {
1045                 element->parent = element_root->data;
1046
1047                 node = element_root;
1048                 basepath = "";
1049         }
1050
1051         element->path = g_strdup_printf("%s/%s", basepath, element->name);
1052
1053         __connman_element_unlock(element);
1054
1055         DBG("element %p path %s", element, element->path);
1056
1057         g_node_append_data(node, element);
1058
1059         if (element->type == CONNMAN_ELEMENT_TYPE_DHCP) {
1060                 element->parent->configuring = TRUE;
1061
1062                 if (__connman_element_count(NULL,
1063                                         CONNMAN_ELEMENT_TYPE_CONNECTION) == 0)
1064                         emit_state_change(connection, "connecting");
1065         }
1066
1067         if (element->type == CONNMAN_ELEMENT_TYPE_CONNECTION) {
1068                 struct connman_element *parent = element->parent;
1069
1070                 while (parent) {
1071                         parent->configuring = FALSE;
1072                         parent = parent->parent;
1073                 }
1074
1075                 if (__connman_element_count(NULL,
1076                                         CONNMAN_ELEMENT_TYPE_CONNECTION) == 1)
1077                         emit_state_change(connection, "online");
1078         }
1079
1080         emit_element_signal(connection, "ElementAdded", element);
1081
1082         if (started == FALSE)
1083                 return;
1084
1085         probe_element(element);
1086 }
1087
1088 /**
1089  * connman_element_register:
1090  * @element: the element to register
1091  * @parent: the parent to register the element with
1092  *
1093  * Register an element with the core. It will be register under the given
1094  * parent of if %NULL is provided under the root element.
1095  *
1096  * Returns: %0 on success
1097  */
1098 int connman_element_register(struct connman_element *element,
1099                                         struct connman_element *parent)
1100 {
1101         DBG("element %p name %s parent %p", element, element->name, parent);
1102
1103         if (element->devname == NULL)
1104                 element->devname = g_strdup(element->name);
1105
1106         if (device_filter && element->type == CONNMAN_ELEMENT_TYPE_DEVICE) {
1107                 if (g_pattern_match_simple(device_filter,
1108                                                 element->devname) == FALSE) {
1109                         DBG("ignoring %s [%s] device", element->name,
1110                                                         element->devname);
1111                         return -EPERM;
1112                 }
1113         }
1114
1115         if (connman_element_ref(element) == NULL)
1116                 return -EINVAL;
1117
1118         __connman_element_lock(element);
1119
1120         if (element->name == NULL) {
1121                 element->name = g_strdup(type2string(element->type));
1122                 if (element->name == NULL) {
1123                         __connman_element_unlock(element);
1124                         return -EINVAL;
1125                 }
1126         }
1127
1128         if (element->type == CONNMAN_ELEMENT_TYPE_DHCP)
1129                 element->ipv4.method = CONNMAN_IPV4_METHOD_DHCP;
1130
1131         element->parent = parent;
1132
1133         __connman_element_unlock(element);
1134
1135         register_element(element, NULL);
1136
1137         return 0;
1138 }
1139
1140 static gboolean remove_element(GNode *node, gpointer user_data)
1141 {
1142         struct connman_element *element = node->data;
1143         struct connman_element *root = user_data;
1144
1145         DBG("element %p name %s", element, element->name);
1146
1147         if (element == root)
1148                 return FALSE;
1149
1150         if (node != NULL)
1151                 g_node_unlink(node);
1152
1153         if (element->driver) {
1154                 if (element->driver->remove)
1155                         element->driver->remove(element);
1156
1157                 __connman_element_lock(element);
1158                 element->driver = NULL;
1159                 __connman_element_unlock(element);
1160         }
1161
1162         if (node != NULL)
1163                 g_node_destroy(node);
1164
1165         if (element->type == CONNMAN_ELEMENT_TYPE_CONNECTION) {
1166                 if (__connman_element_count(NULL,
1167                                         CONNMAN_ELEMENT_TYPE_CONNECTION) == 0)
1168                         emit_state_change(connection, "offline");
1169         }
1170
1171         emit_element_signal(connection, "ElementRemoved", element);
1172
1173         connman_element_unref(element);
1174
1175         return FALSE;
1176 }
1177
1178 void connman_element_unregister(struct connman_element *element)
1179 {
1180         GNode *node;
1181
1182         DBG("element %p name %s", element, element->name);
1183
1184         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
1185
1186         if (node != NULL)
1187                 g_node_traverse(node, G_POST_ORDER,
1188                                 G_TRAVERSE_ALL, -1, remove_element, NULL);
1189 }
1190
1191 void connman_element_unregister_children(struct connman_element *element)
1192 {
1193         GNode *node;
1194
1195         DBG("element %p name %s", element, element->name);
1196
1197         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
1198
1199         if (node != NULL)
1200                 g_node_traverse(node, G_POST_ORDER,
1201                                 G_TRAVERSE_ALL, -1, remove_element, element);
1202 }
1203
1204 static gboolean update_element(GNode *node, gpointer user_data)
1205 {
1206         struct connman_element *element = node->data;
1207
1208         DBG("element %p name %s", element, element->name);
1209
1210         if (element->driver && element->driver->update)
1211                 element->driver->update(element);
1212
1213         emit_element_signal(connection, "ElementUpdated", element);
1214
1215         return FALSE;
1216 }
1217
1218 void connman_element_update(struct connman_element *element)
1219 {
1220         GNode *node;
1221
1222         DBG("element %p name %s", element, element->name);
1223
1224         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
1225
1226         if (node != NULL)
1227                 g_node_traverse(node, G_PRE_ORDER,
1228                                 G_TRAVERSE_ALL, -1, update_element, element);
1229 }
1230
1231 int connman_element_set_enabled(struct connman_element *element,
1232                                                         gboolean enabled)
1233 {
1234         if (element->enabled == enabled)
1235                 return 0;
1236
1237         element->enabled = enabled;
1238
1239         connman_element_update(element);
1240
1241         return 0;
1242 }
1243
1244 /**
1245  * connman_element_set_error:
1246  * @element: element structure
1247  * @error: error identifier
1248  *
1249  * Set error state and specific error identifier
1250  */
1251 void connman_element_set_error(struct connman_element *element,
1252                                         enum connman_element_error error)
1253 {
1254         DBG("element %p error %d", element, error);
1255
1256         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
1257                 return;
1258
1259         element->state = CONNMAN_ELEMENT_STATE_ERROR;
1260         element->error = error;
1261
1262         if (element->driver && element->driver->change)
1263                 element->driver->change(element);
1264 }
1265
1266 int __connman_element_init(DBusConnection *conn, const char *device,
1267                                                         const char *nodevice)
1268 {
1269         struct connman_element *element;
1270
1271         DBG("conn %p", conn);
1272
1273         connection = dbus_connection_ref(conn);
1274         if (connection == NULL)
1275                 return -EIO;
1276
1277         device_filter = g_strdup(device);
1278
1279         element = connman_element_create("root");
1280
1281         element->path = g_strdup("/");
1282         element->type = CONNMAN_ELEMENT_TYPE_ROOT;
1283
1284         element_root = g_node_new(element);
1285
1286         __connman_notifier_init();
1287         __connman_service_init();
1288         __connman_network_init();
1289         __connman_device_init();
1290
1291         return 0;
1292 }
1293
1294 static gboolean probe_node(GNode *node, gpointer data)
1295 {
1296         struct connman_element *element = node->data;
1297
1298         DBG("element %p name %s", element, element->name);
1299
1300         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
1301                 return FALSE;
1302
1303         if (element->driver)
1304                 return FALSE;
1305
1306         probe_element(element);
1307
1308         return FALSE;
1309 }
1310
1311 void __connman_element_start(void)
1312 {
1313         DBG("");
1314
1315         g_node_traverse(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
1316                                                         probe_node, NULL);
1317
1318         started = TRUE;
1319
1320         __connman_storage_init_device();
1321
1322         __connman_connection_init();
1323         __connman_ipv4_init();
1324         __connman_detect_init();
1325 }
1326
1327 void __connman_element_stop(void)
1328 {
1329         DBG("");
1330
1331         __connman_detect_cleanup();
1332         __connman_ipv4_cleanup();
1333         __connman_connection_cleanup();
1334 }
1335
1336 static gboolean free_driver(GNode *node, gpointer data)
1337 {
1338         struct connman_element *element = node->data;
1339
1340         DBG("element %p name %s", element, element->name);
1341
1342         if (element->driver) {
1343                 if (element->driver->remove)
1344                         element->driver->remove(element);
1345
1346                 __connman_element_lock(element);
1347                 element->driver = NULL;
1348                 __connman_element_unlock(element);
1349         }
1350
1351         return FALSE;
1352 }
1353
1354 static gboolean free_node(GNode *node, gpointer data)
1355 {
1356         struct connman_element *element = node->data;
1357
1358         DBG("element %p name %s", element, element->name);
1359
1360         if (g_node_depth(node) > 1)
1361                 connman_element_unregister(element);
1362
1363         return FALSE;
1364 }
1365
1366 void __connman_element_cleanup(void)
1367 {
1368         DBG("");
1369
1370         __connman_device_cleanup();
1371         __connman_network_cleanup();
1372         __connman_service_cleanup();
1373         __connman_notifier_cleanup();
1374
1375         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
1376                                                         free_driver, NULL);
1377
1378         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
1379                                                         free_node, NULL);
1380
1381         g_node_destroy(element_root);
1382         element_root = NULL;
1383
1384         g_free(device_filter);
1385
1386         dbus_connection_unref(connection);
1387 }