plugins/bluetooth.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2008  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <errno.h>
  27
  28 #include <gdbus.h>
  29
  30 #include <connman/plugin.h>
  31 #include <connman/driver.h>
  32 #include <connman/log.h>
  33
  34 #define BLUEZ_SERVICE                   "org.bluez"
  35 #define BLUEZ_MANAGER_INTERFACE         BLUEZ_SERVICE ".Manager"
  36 #define BLUEZ_ADAPTER_INTERFACE         BLUEZ_SERVICE ".Adapter"
  37
  38 #define ADAPTER_ADDED                   "AdapterAdded"
  39 #define ADAPTER_REMOVED                 "AdapterRemoved"
  40 #define PROPERTY_CHANGED                "PropertyChanged"
  41
  42 #define TIMEOUT 5000
  43
  44 static int bluetooth_probe(struct connman_element *device)
  45 {
  46         DBG("device %p name %s", device, device->name);
  47
  48         return 0;
  49 }
  50
  51 static void bluetooth_remove(struct connman_element *device)
  52 {
  53         DBG("device %p name %s", device, device->name);
  54 }
  55
  56 static int bluetooth_enable(struct connman_element *device)
  57 {
  58         DBG("device %p name %s", device, device->name);
  59
  60         return -EINVAL;
  61 }
  62
  63 static int bluetooth_disable(struct connman_element *device)
  64 {
  65         DBG("device %p name %s", device, device->name);
  66
  67         return 0;
  68 }
  69
  70 static struct connman_driver bluetooth_driver = {
  71         .name           = "bluetooth",
  72         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
  73         .subtype        = CONNMAN_ELEMENT_SUBTYPE_BLUETOOTH,
  74         .probe          = bluetooth_probe,
  75         .remove         = bluetooth_remove,
  76         .enable         = bluetooth_enable,
  77         .disable        = bluetooth_disable,
  78 };
  79
  80 static GSList *device_list = NULL;
  81
  82 static struct connman_element *find_adapter(const char *path)
  83 {
  84         const char *devname = g_basename(path);
  85         GSList *list;
  86
  87         DBG("path %s", path);
  88
  89         for (list = device_list; list; list = list->next) {
  90                 struct connman_element *device = list->data;
  91
  92                 if (g_str_equal(device->devname, devname) == TRUE)
  93                         return device;
  94         }
  95
  96         return NULL;
  97 }
  98
  99 static void property_changed(DBusConnection *connection, DBusMessage *message)
 100 {
 101         const char *path = dbus_message_get_path(message);
 102         struct connman_element *device;
 103         DBusMessageIter iter, value;
 104         const char *key;
 105
 106         DBG("path %s", path);
 107
 108         device = find_adapter(path);
 109         if (device == NULL)
 110                 return;
 111
 112         if (dbus_message_iter_init(message, &iter) == FALSE)
 113                 return;
 114
 115         dbus_message_iter_get_basic(&iter, &key);
 116
 117         dbus_message_iter_next(&iter);
 118         dbus_message_iter_recurse(&iter, &value);
 119
 120         if (g_str_equal(key, "Powered") == TRUE) {
 121                 gboolean val;
 122
 123                 dbus_message_iter_get_basic(&value, &val);
 124                 connman_element_set_enabled(device, val);
 125         } else if (g_str_equal(key, "Discovering") == TRUE) {
 126                 gboolean val;
 127
 128                 dbus_message_iter_get_basic(&value, &val);
 129                 connman_element_set_scanning(device, val);
 130         }
 131 }
 132
 133 static void properties_reply(DBusPendingCall *call, void *user_data)
 134 {
 135         DBusMessage *message = user_data;
 136         const char *path = dbus_message_get_path(message);
 137         struct connman_element *device;
 138         DBusMessageIter array, dict;
 139         DBusMessage *reply;
 140
 141         DBG("path %s", path);
 142
 143         device = find_adapter(path);
 144
 145         dbus_message_unref(message);
 146
 147         reply = dbus_pending_call_steal_reply(call);
 148
 149         if (device == NULL)
 150                 goto done;
 151
 152         if (dbus_message_iter_init(reply, &array) == FALSE)
 153                 goto done;
 154
 155         if (dbus_message_iter_get_arg_type(&array) != DBUS_TYPE_ARRAY)
 156                 goto done;
 157
 158         dbus_message_iter_recurse(&array, &dict);
 159         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 160                 DBusMessageIter entry, value;
 161                 const char *key;
 162
 163                 dbus_message_iter_recurse(&dict, &entry);
 164                 dbus_message_iter_get_basic(&entry, &key);
 165
 166                 dbus_message_iter_next(&entry);
 167                 dbus_message_iter_recurse(&entry, &value);
 168
 169                 if (g_str_equal(key, "Powered") == TRUE) {
 170                         gboolean val;
 171
 172                         dbus_message_iter_get_basic(&value, &val);
 173                         connman_element_set_enabled(device, val);
 174                 } else if (g_str_equal(key, "Discovering") == TRUE) {
 175                         gboolean val;
 176
 177                         dbus_message_iter_get_basic(&value, &val);
 178                         connman_element_set_scanning(device, val);
 179                 }
 180
 181                 dbus_message_iter_next(&dict);
 182         }
 183
 184 done:
 185         dbus_message_unref(reply);
 186 }
 187
 188 static void devices_reply(DBusPendingCall *call, void *user_data)
 189 {
 190         DBusMessage *message = user_data;
 191         const char *path = dbus_message_get_path(message);
 192         DBusMessage *reply;
 193         DBusError error;
 194         char **devices;
 195         int i, num_devices;
 196
 197         DBG("path %s", path);
 198
 199         dbus_message_unref(message);
 200
 201         reply = dbus_pending_call_steal_reply(call);
 202
 203         dbus_error_init(&error);
 204
 205         if (dbus_message_get_args(reply, &error,
 206                                 DBUS_TYPE_ARRAY, DBUS_TYPE_OBJECT_PATH,
 207                                                 &devices, &num_devices,
 208                                                 DBUS_TYPE_INVALID) == FALSE) {
 209                 if (dbus_error_is_set(&error) == TRUE) {
 210                         connman_error("%s", error.message);
 211                         dbus_error_free(&error);
 212                 } else
 213                         connman_error("Wrong arguments for device list");
 214                 goto done;
 215         }
 216
 217         for (i = 0; i < num_devices; i++) {
 218                 DBG("device %s", devices[i]);
 219         }
 220
 221         g_strfreev(devices);
 222
 223 done:
 224         dbus_message_unref(reply);
 225 }
 226
 227 static void add_adapter(DBusConnection *connection, const char *path)
 228 {
 229         struct connman_element *device;
 230         DBusMessage *message;
 231         DBusPendingCall *call;
 232
 233         DBG("path %s", path);
 234
 235         device = find_adapter(path);
 236         if (device != NULL)
 237                 return;
 238
 239         device = connman_element_create(NULL);
 240         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 241         device->subtype = CONNMAN_ELEMENT_SUBTYPE_BLUETOOTH;
 242         device->policy = CONNMAN_ELEMENT_POLICY_IGNORE;
 243
 244         device->name = g_path_get_basename(path);
 245
 246         if (connman_element_register(device, NULL) < 0) {
 247                 connman_element_unref(device);
 248                 return;
 249         }
 250
 251         device_list = g_slist_append(device_list, device);
 252
 253         message = dbus_message_new_method_call(BLUEZ_SERVICE, path,
 254                                 BLUEZ_ADAPTER_INTERFACE, "GetProperties");
 255         if (message == NULL)
 256                 return;
 257
 258         if (dbus_connection_send_with_reply(connection, message,
 259                                                 &call, TIMEOUT) == FALSE) {
 260                 connman_error("Failed to get adapter properties");
 261                 dbus_message_unref(message);
 262                 return;
 263         }
 264
 265         dbus_pending_call_set_notify(call, properties_reply, message, NULL);
 266
 267         message = dbus_message_new_method_call(BLUEZ_SERVICE, path,
 268                                 BLUEZ_ADAPTER_INTERFACE, "ListDevices");
 269         if (message == NULL)
 270                 return;
 271
 272         if (dbus_connection_send_with_reply(connection, message,
 273                                                 &call, TIMEOUT) == FALSE) {
 274                 connman_error("Failed to get Bluetooth devices");
 275                 dbus_message_unref(message);
 276                 return;
 277         }
 278
 279         dbus_pending_call_set_notify(call, devices_reply, message, NULL);
 280 }
 281
 282 static void remove_adapter(DBusConnection *connection, const char *path)
 283 {
 284         struct connman_element *device;
 285
 286         DBG("path %s", path);
 287
 288         device = find_adapter(path);
 289         if (device == NULL)
 290                 return;
 291
 292         device_list = g_slist_remove(device_list, device);
 293
 294         connman_element_unregister(device);
 295         connman_element_unref(device);
 296 }
 297
 298 static void adapters_reply(DBusPendingCall *call, void *user_data)
 299 {
 300         DBusConnection *connection = user_data;
 301         DBusMessage *reply;
 302         DBusError error;
 303         char **adapters;
 304         int i, num_adapters;
 305
 306         DBG("");
 307
 308         reply = dbus_pending_call_steal_reply(call);
 309
 310         dbus_error_init(&error);
 311
 312         if (dbus_message_get_args(reply, &error,
 313                                 DBUS_TYPE_ARRAY, DBUS_TYPE_OBJECT_PATH,
 314                                                 &adapters, &num_adapters,
 315                                                 DBUS_TYPE_INVALID) == FALSE) {
 316                 if (dbus_error_is_set(&error) == TRUE) {
 317                         connman_error("%s", error.message);
 318                         dbus_error_free(&error);
 319                 } else
 320                         connman_error("Wrong arguments for adapter list");
 321                 goto done;
 322         }
 323
 324         for (i = 0; i < num_adapters; i++)
 325                 add_adapter(connection, adapters[i]);
 326
 327         g_strfreev(adapters);
 328
 329 done:
 330         dbus_message_unref(reply);
 331 }
 332
 333 static void bluetooth_connect(DBusConnection *connection, void *user_data)
 334 {
 335         DBusMessage *message;
 336         DBusPendingCall *call;
 337
 338         DBG("connection %p", connection);
 339
 340         message = dbus_message_new_method_call(BLUEZ_SERVICE, "/",
 341                                 BLUEZ_MANAGER_INTERFACE, "ListAdapters");
 342         if (message == NULL)
 343                 return;
 344
 345         if (dbus_connection_send_with_reply(connection, message,
 346                                                 &call, TIMEOUT) == FALSE) {
 347                 connman_error("Failed to get Bluetooth adapters");
 348                 dbus_message_unref(message);
 349                 return;
 350         }
 351
 352         dbus_pending_call_set_notify(call, adapters_reply, connection, NULL);
 353
 354         dbus_message_unref(message);
 355 }
 356
 357 static void bluetooth_disconnect(DBusConnection *connection, void *user_data)
 358 {
 359         GSList *list;
 360
 361         DBG("connection %p", connection);
 362
 363         for (list = device_list; list; list = list->next) {
 364                 struct connman_element *device = list->data;
 365
 366                 connman_element_unregister(device);
 367                 connman_element_unref(device);
 368         }
 369
 370         g_slist_free(device_list);
 371         device_list = NULL;
 372 }
 373
 374 static DBusHandlerResult bluetooth_signal(DBusConnection *connection,
 375                                         DBusMessage *message, void *user_data)
 376 {
 377         DBG("connection %p", connection);
 378
 379         if (dbus_message_is_signal(message, BLUEZ_ADAPTER_INTERFACE,
 380                                                 PROPERTY_CHANGED) == TRUE) {
 381                 property_changed(connection, message);
 382         } else if (dbus_message_is_signal(message, BLUEZ_MANAGER_INTERFACE,
 383                                                 ADAPTER_ADDED) == TRUE) {
 384                 const char *path;
 385                 dbus_message_get_args(message, NULL,
 386                                         DBUS_TYPE_OBJECT_PATH, &path,
 387                                                         DBUS_TYPE_INVALID);
 388                 add_adapter(connection, path);
 389         } else if (dbus_message_is_signal(message, BLUEZ_MANAGER_INTERFACE,
 390                                                 ADAPTER_REMOVED) == TRUE) {
 391                 const char *path;
 392                 dbus_message_get_args(message, NULL,
 393                                         DBUS_TYPE_OBJECT_PATH, &path,
 394                                                         DBUS_TYPE_INVALID);
 395                 remove_adapter(connection, path);
 396         }
 397
 398         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 399 }
 400
 401 static DBusConnection *connection;
 402 static guint watch;
 403
 404 static const char *added_rule = "type=signal,member=" ADAPTER_ADDED
 405                                         ",interface=" BLUEZ_MANAGER_INTERFACE;
 406 static const char *removed_rule = "type=signal,member=" ADAPTER_REMOVED
 407                                         ",interface=" BLUEZ_MANAGER_INTERFACE;
 408
 409 static const char *adapter_rule = "type=signal,member=" PROPERTY_CHANGED
 410                                         ",interface=" BLUEZ_ADAPTER_INTERFACE;
 411
 412 static int bluetooth_init(void)
 413 {
 414         int err = -EIO;
 415
 416         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 417         if (connection == NULL)
 418                 return -EIO;
 419
 420         if (dbus_connection_add_filter(connection, bluetooth_signal,
 421                                                         NULL, NULL) == FALSE)
 422                 goto unref;
 423
 424         err = connman_driver_register(&bluetooth_driver);
 425         if (err < 0)
 426                 goto remove;
 427
 428         watch = g_dbus_add_service_watch(connection, BLUEZ_SERVICE,
 429                         bluetooth_connect, bluetooth_disconnect, NULL, NULL);
 430         if (watch == 0) {
 431                 connman_driver_unregister(&bluetooth_driver);
 432                 err = -EIO;
 433                 goto remove;
 434         }
 435
 436         if (g_dbus_check_service(connection, BLUEZ_SERVICE) == TRUE)
 437                 bluetooth_connect(connection, NULL);
 438
 439         dbus_bus_add_match(connection, added_rule, NULL);
 440         dbus_bus_add_match(connection, removed_rule, NULL);
 441         dbus_bus_add_match(connection, adapter_rule, NULL);
 442         dbus_connection_flush(connection);
 443
 444         return 0;
 445
 446 remove:
 447         dbus_connection_remove_filter(connection, bluetooth_signal, NULL);
 448
 449 unref:
 450         dbus_connection_unref(connection);
 451
 452         return err;
 453 }
 454
 455 static void bluetooth_exit(void)
 456 {
 457         dbus_bus_remove_match(connection, adapter_rule, NULL);
 458         dbus_bus_remove_match(connection, removed_rule, NULL);
 459         dbus_bus_remove_match(connection, added_rule, NULL);
 460         dbus_connection_flush(connection);
 461
 462         g_dbus_remove_watch(connection, watch);
 463
 464         bluetooth_disconnect(connection, NULL);
 465
 466         connman_driver_unregister(&bluetooth_driver);
 467
 468         dbus_connection_remove_filter(connection, bluetooth_signal, NULL);
 469
 470         dbus_connection_unref(connection);
 471 }
 472
 473 CONNMAN_PLUGIN_DEFINE(bluetooth, "Bluetooth technology plugin", VERSION,
 474                                                 bluetooth_init, bluetooth_exit)