gio/gdbusconnection.h

   1 /* GDBus - GLib D-Bus Library
   2  *
   3  * Copyright (C) 2008-2010 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Author: David Zeuthen <davidz@redhat.com>
  21  */
  22
  23 #if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
  24 #error "Only <gio/gio.h> can be included directly."
  25 #endif
  26
  27 #ifndef __G_DBUS_CONNECTION_H__
  28 #define __G_DBUS_CONNECTION_H__
  29
  30 #include <gio/giotypes.h>
  31
  32 G_BEGIN_DECLS
  33
  34 #define G_TYPE_DBUS_CONNECTION         (g_dbus_connection_get_type ())
  35 #define G_DBUS_CONNECTION(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_DBUS_CONNECTION, GDBusConnection))
  36 #define G_IS_DBUS_CONNECTION(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_DBUS_CONNECTION))
  37
  38 GType            g_dbus_connection_get_type                   (void) G_GNUC_CONST;
  39
  40 /* ---------------------------------------------------------------------------------------------------- */
  41
  42 void              g_bus_get                    (GBusType             bus_type,
  43                                                 GCancellable        *cancellable,
  44                                                 GAsyncReadyCallback  callback,
  45                                                 gpointer             user_data);
  46 GDBusConnection  *g_bus_get_finish             (GAsyncResult        *res,
  47                                                 GError             **error);
  48 GDBusConnection  *g_bus_get_sync               (GBusType            bus_type,
  49                                                 GCancellable       *cancellable,
  50                                                 GError            **error);
  51
  52 /* ---------------------------------------------------------------------------------------------------- */
  53
  54 void             g_dbus_connection_new                        (GIOStream              *stream,
  55                                                                const gchar            *guid,
  56                                                                GDBusConnectionFlags    flags,
  57                                                                GDBusAuthObserver      *observer,
  58                                                                GCancellable           *cancellable,
  59                                                                GAsyncReadyCallback     callback,
  60                                                                gpointer                user_data);
  61 GDBusConnection *g_dbus_connection_new_finish                 (GAsyncResult           *res,
  62                                                                GError                **error);
  63 GDBusConnection *g_dbus_connection_new_sync                   (GIOStream              *stream,
  64                                                                const gchar            *guid,
  65                                                                GDBusConnectionFlags    flags,
  66                                                                GDBusAuthObserver      *observer,
  67                                                                GCancellable           *cancellable,
  68                                                                GError                **error);
  69
  70 void             g_dbus_connection_new_for_address            (const gchar            *address,
  71                                                                GDBusConnectionFlags    flags,
  72                                                                GDBusAuthObserver      *observer,
  73                                                                GCancellable           *cancellable,
  74                                                                GAsyncReadyCallback     callback,
  75                                                                gpointer                user_data);
  76 GDBusConnection *g_dbus_connection_new_for_address_finish     (GAsyncResult           *res,
  77                                                                GError                **error);
  78 GDBusConnection *g_dbus_connection_new_for_address_sync       (const gchar            *address,
  79                                                                GDBusConnectionFlags    flags,
  80                                                                GDBusAuthObserver      *observer,
  81                                                                GCancellable           *cancellable,
  82                                                                GError                **error);
  83
  84 /* ---------------------------------------------------------------------------------------------------- */
  85
  86 void             g_dbus_connection_start_message_processing   (GDBusConnection    *connection);
  87 gboolean         g_dbus_connection_is_closed                  (GDBusConnection    *connection);
  88 GIOStream       *g_dbus_connection_get_stream                 (GDBusConnection    *connection);
  89 const gchar     *g_dbus_connection_get_guid                   (GDBusConnection    *connection);
  90 const gchar     *g_dbus_connection_get_unique_name            (GDBusConnection    *connection);
  91 GCredentials    *g_dbus_connection_get_peer_credentials       (GDBusConnection    *connection);
  92 gboolean         g_dbus_connection_get_exit_on_close          (GDBusConnection    *connection);
  93 void             g_dbus_connection_set_exit_on_close          (GDBusConnection    *connection,
  94                                                                gboolean            exit_on_close);
  95 GDBusCapabilityFlags  g_dbus_connection_get_capabilities      (GDBusConnection    *connection);
  96
  97 /* ---------------------------------------------------------------------------------------------------- */
  98
  99 void             g_dbus_connection_close                          (GDBusConnection     *connection,
 100                                                                    GCancellable        *cancellable,
 101                                                                    GAsyncReadyCallback  callback,
 102                                                                    gpointer             user_data);
 103 gboolean         g_dbus_connection_close_finish                   (GDBusConnection     *connection,
 104                                                                    GAsyncResult        *res,
 105                                                                    GError             **error);
 106 gboolean         g_dbus_connection_close_sync                     (GDBusConnection     *connection,
 107                                                                    GCancellable        *cancellable,
 108                                                                    GError             **error);
 109
 110 /* ---------------------------------------------------------------------------------------------------- */
 111
 112 void             g_dbus_connection_flush                          (GDBusConnection     *connection,
 113                                                                    GCancellable        *cancellable,
 114                                                                    GAsyncReadyCallback  callback,
 115                                                                    gpointer             user_data);
 116 gboolean         g_dbus_connection_flush_finish                   (GDBusConnection     *connection,
 117                                                                    GAsyncResult        *res,
 118                                                                    GError             **error);
 119 gboolean         g_dbus_connection_flush_sync                     (GDBusConnection     *connection,
 120                                                                    GCancellable        *cancellable,
 121                                                                    GError             **error);
 122
 123 /* ---------------------------------------------------------------------------------------------------- */
 124
 125 gboolean         g_dbus_connection_send_message                   (GDBusConnection     *connection,
 126                                                                    GDBusMessage        *message,
 127                                                                    GDBusSendMessageFlags flags,
 128                                                                    volatile guint32    *out_serial,
 129                                                                    GError             **error);
 130 void             g_dbus_connection_send_message_with_reply        (GDBusConnection     *connection,
 131                                                                    GDBusMessage        *message,
 132                                                                    GDBusSendMessageFlags flags,
 133                                                                    gint                 timeout_msec,
 134                                                                    volatile guint32    *out_serial,
 135                                                                    GCancellable        *cancellable,
 136                                                                    GAsyncReadyCallback  callback,
 137                                                                    gpointer             user_data);
 138 GDBusMessage    *g_dbus_connection_send_message_with_reply_finish (GDBusConnection     *connection,
 139                                                                    GAsyncResult        *res,
 140                                                                    GError             **error);
 141 GDBusMessage    *g_dbus_connection_send_message_with_reply_sync   (GDBusConnection     *connection,
 142                                                                    GDBusMessage        *message,
 143                                                                    GDBusSendMessageFlags flags,
 144                                                                    gint                 timeout_msec,
 145                                                                    volatile guint32    *out_serial,
 146                                                                    GCancellable        *cancellable,
 147                                                                    GError             **error);
 148
 149 /* ---------------------------------------------------------------------------------------------------- */
 150
 151 gboolean  g_dbus_connection_emit_signal                       (GDBusConnection    *connection,
 152                                                                const gchar        *destination_bus_name,
 153                                                                const gchar        *object_path,
 154                                                                const gchar        *interface_name,
 155                                                                const gchar        *signal_name,
 156                                                                GVariant           *parameters,
 157                                                                GError            **error);
 158 void      g_dbus_connection_call                              (GDBusConnection    *connection,
 159                                                                const gchar        *bus_name,
 160                                                                const gchar        *object_path,
 161                                                                const gchar        *interface_name,
 162                                                                const gchar        *method_name,
 163                                                                GVariant           *parameters,
 164                                                                const GVariantType *reply_type,
 165                                                                GDBusCallFlags      flags,
 166                                                                gint                timeout_msec,
 167                                                                GCancellable       *cancellable,
 168                                                                GAsyncReadyCallback callback,
 169                                                                gpointer            user_data);
 170 GVariant *g_dbus_connection_call_finish                       (GDBusConnection    *connection,
 171                                                                GAsyncResult       *res,
 172                                                                GError            **error);
 173 GVariant *g_dbus_connection_call_sync                         (GDBusConnection    *connection,
 174                                                                const gchar        *bus_name,
 175                                                                const gchar        *object_path,
 176                                                                const gchar        *interface_name,
 177                                                                const gchar        *method_name,
 178                                                                GVariant           *parameters,
 179                                                                const GVariantType *reply_type,
 180                                                                GDBusCallFlags      flags,
 181                                                                gint                timeout_msec,
 182                                                                GCancellable       *cancellable,
 183                                                                GError            **error);
 184
 185 /* ---------------------------------------------------------------------------------------------------- */
 186
 187
 188 /**
 189  * GDBusInterfaceMethodCallFunc:
 190  * @connection: A #GDBusConnection.
 191  * @sender: The unique bus name of the remote caller.
 192  * @object_path: The object path that the method was invoked on.
 193  * @interface_name: The D-Bus interface name the method was invoked on.
 194  * @method_name: The name of the method that was invoked.
 195  * @parameters: A #GVariant tuple with parameters.
 196  * @invocation: A #GDBusMethodInvocation object that can be used to return a value or error.
 197  * @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
 198  *
 199  * The type of the @method_call function in #GDBusInterfaceVTable.
 200  *
 201  * Since: 2.26
 202  */
 203 typedef void (*GDBusInterfaceMethodCallFunc) (GDBusConnection       *connection,
 204                                               const gchar           *sender,
 205                                               const gchar           *object_path,
 206                                               const gchar           *interface_name,
 207                                               const gchar           *method_name,
 208                                               GVariant              *parameters,
 209                                               GDBusMethodInvocation *invocation,
 210                                               gpointer               user_data);
 211
 212 /**
 213  * GDBusInterfaceGetPropertyFunc:
 214  * @connection: A #GDBusConnection.
 215  * @sender: The unique bus name of the remote caller.
 216  * @object_path: The object path that the method was invoked on.
 217  * @interface_name: The D-Bus interface name for the property.
 218  * @property_name: The name of the property to get the value of.
 219  * @error: Return location for error.
 220  * @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
 221  *
 222  * The type of the @get_property function in #GDBusInterfaceVTable.
 223  *
 224  * Returns: A #GVariant with the value for @property_name or %NULL if
 225  *     @error is set. If the returned #GVariant is floating, it is
 226  *     consumed - otherwise its reference count is decreased by one.
 227  *
 228  * Since: 2.26
 229  */
 230 typedef GVariant *(*GDBusInterfaceGetPropertyFunc) (GDBusConnection       *connection,
 231                                                     const gchar           *sender,
 232                                                     const gchar           *object_path,
 233                                                     const gchar           *interface_name,
 234                                                     const gchar           *property_name,
 235                                                     GError               **error,
 236                                                     gpointer               user_data);
 237
 238 /**
 239  * GDBusInterfaceSetPropertyFunc:
 240  * @connection: A #GDBusConnection.
 241  * @sender: The unique bus name of the remote caller.
 242  * @object_path: The object path that the method was invoked on.
 243  * @interface_name: The D-Bus interface name for the property.
 244  * @property_name: The name of the property to get the value of.
 245  * @value: The value to set the property to.
 246  * @error: Return location for error.
 247  * @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
 248  *
 249  * The type of the @set_property function in #GDBusInterfaceVTable.
 250  *
 251  * Returns: %TRUE if the property was set to @value, %FALSE if @error is set.
 252  *
 253  * Since: 2.26
 254  */
 255 typedef gboolean  (*GDBusInterfaceSetPropertyFunc) (GDBusConnection       *connection,
 256                                                     const gchar           *sender,
 257                                                     const gchar           *object_path,
 258                                                     const gchar           *interface_name,
 259                                                     const gchar           *property_name,
 260                                                     GVariant              *value,
 261                                                     GError               **error,
 262                                                     gpointer               user_data);
 263
 264 /**
 265  * GDBusInterfaceVTable:
 266  * @method_call: Function for handling incoming method calls.
 267  * @get_property: Function for getting a property.
 268  * @set_property: Function for setting a property.
 269  *
 270  * Virtual table for handling properties and method calls for a D-Bus
 271  * interface.
 272  *
 273  * If you want to handle getting/setting D-Bus properties asynchronously, simply
 274  * register an object with the <literal>org.freedesktop.DBus.Properties</literal>
 275  * D-Bus interface using g_dbus_connection_register_object().
 276  *
 277  * Since: 2.26
 278  */
 279 struct _GDBusInterfaceVTable
 280 {
 281   GDBusInterfaceMethodCallFunc  method_call;
 282   GDBusInterfaceGetPropertyFunc get_property;
 283   GDBusInterfaceSetPropertyFunc set_property;
 284
 285   /*< private >*/
 286   /* Padding for future expansion - also remember to update
 287    * gdbusconnection.c:_g_dbus_interface_vtable_copy() when
 288    * changing this.
 289    */
 290   gpointer padding[8];
 291 };
 292
 293 guint            g_dbus_connection_register_object            (GDBusConnection            *connection,
 294                                                                const gchar                *object_path,
 295                                                                GDBusInterfaceInfo         *interface_info,
 296                                                                const GDBusInterfaceVTable *vtable,
 297                                                                gpointer                    user_data,
 298                                                                GDestroyNotify              user_data_free_func,
 299                                                                GError                    **error);
 300 gboolean         g_dbus_connection_unregister_object          (GDBusConnection            *connection,
 301                                                                guint                       registration_id);
 302
 303 /* ---------------------------------------------------------------------------------------------------- */
 304
 305 /**
 306  * GDBusSubtreeEnumerateFunc:
 307  * @connection: A #GDBusConnection.
 308  * @sender: The unique bus name of the remote caller.
 309  * @object_path: The object path that was registered with g_dbus_connection_register_subtree().
 310  * @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
 311  *
 312  * The type of the @enumerate function in #GDBusSubtreeVTable.
 313  *
 314  * This function is called when generating introspection data and also
 315  * when preparing to dispatch incoming messages in the event that the
 316  * %G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES flag is not
 317  * specified (ie: to verify that the object path is valid).
 318  *
 319  * Hierarchies are not supported; the items that you return should not
 320  * contain the '/' character.
 321  *
 322  * The return value will be freed with g_strfreev().
 323  *
 324  * Returns: A newly allocated array of strings for node names that are children of @object_path.
 325  *
 326  * Since: 2.26
 327  */
 328 typedef gchar** (*GDBusSubtreeEnumerateFunc) (GDBusConnection       *connection,
 329                                               const gchar           *sender,
 330                                               const gchar           *object_path,
 331                                               gpointer               user_data);
 332
 333 /**
 334  * GDBusSubtreeIntrospectFunc:
 335  * @connection: A #GDBusConnection.
 336  * @sender: The unique bus name of the remote caller.
 337  * @object_path: The object path that was registered with g_dbus_connection_register_subtree().
 338  * @node: A node that is a child of @object_path (relative to @object_path) or %NULL for the root of the subtree.
 339  * @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
 340  *
 341  * The type of the @introspect function in #GDBusSubtreeVTable.
 342  *
 343  * Subtrees are flat.  @node, if non-%NULL, is always exactly one
 344  * segment of the object path (ie: it never contains a slash).
 345  *
 346  * This function should return %NULL to indicate that there is no object
 347  * at this node.
 348  *
 349  * If this function returns non-%NULL, the return value is expected to
 350  * be a %NULL-terminated array of pointers to #GDBusInterfaceInfo
 351  * structures describing the interfaces implemented by @node.  This
 352  * array will have g_dbus_interface_info_unref() called on each item
 353  * before being freed with g_free().
 354  *
 355  * The difference between returning %NULL and an array containing zero
 356  * items is that the standard DBus interfaces will returned to the
 357  * remote introspector in the empty array case, but not in the %NULL
 358  * case.
 359  *
 360  * Returns: A %NULL-terminated array of pointers to #GDBusInterfaceInfo, or %NULL.
 361  *
 362  * Since: 2.26
 363  */
 364 typedef GDBusInterfaceInfo ** (*GDBusSubtreeIntrospectFunc) (GDBusConnection       *connection,
 365                                                              const gchar           *sender,
 366                                                              const gchar           *object_path,
 367                                                              const gchar           *node,
 368                                                              gpointer               user_data);
 369
 370 /**
 371  * GDBusSubtreeDispatchFunc:
 372  * @connection: A #GDBusConnection.
 373  * @sender: The unique bus name of the remote caller.
 374  * @object_path: The object path that was registered with g_dbus_connection_register_subtree().
 375  * @interface_name: The D-Bus interface name that the method call or property access is for.
 376  * @node: A node that is a child of @object_path (relative to @object_path) or %NULL for the root of the subtree.
 377  * @out_user_data: Return location for user data to pass to functions in the returned #GDBusInterfaceVTable (never %NULL).
 378  * @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
 379  *
 380  * The type of the @dispatch function in #GDBusSubtreeVTable.
 381  *
 382  * Subtrees are flat.  @node, if non-%NULL, is always exactly one
 383  * segment of the object path (ie: it never contains a slash).
 384  *
 385  * Returns: A #GDBusInterfaceVTable or %NULL if you don't want to handle the methods.
 386  *
 387  * Since: 2.26
 388  */
 389 typedef const GDBusInterfaceVTable * (*GDBusSubtreeDispatchFunc) (GDBusConnection             *connection,
 390                                                                   const gchar                 *sender,
 391                                                                   const gchar                 *object_path,
 392                                                                   const gchar                 *interface_name,
 393                                                                   const gchar                 *node,
 394                                                                   gpointer                    *out_user_data,
 395                                                                   gpointer                     user_data);
 396
 397 /**
 398  * GDBusSubtreeVTable:
 399  * @enumerate: Function for enumerating child nodes.
 400  * @introspect: Function for introspecting a child node.
 401  * @dispatch: Function for dispatching a remote call on a child node.
 402  *
 403  * Virtual table for handling subtrees registered with g_dbus_connection_register_subtree().
 404  *
 405  * Since: 2.26
 406  */
 407 struct _GDBusSubtreeVTable
 408 {
 409   GDBusSubtreeEnumerateFunc  enumerate;
 410   GDBusSubtreeIntrospectFunc introspect;
 411   GDBusSubtreeDispatchFunc   dispatch;
 412
 413   /*< private >*/
 414   /* Padding for future expansion - also remember to update
 415    * gdbusconnection.c:_g_dbus_subtree_vtable_copy() when
 416    * changing this.
 417    */
 418   gpointer padding[8];
 419 };
 420
 421 guint            g_dbus_connection_register_subtree           (GDBusConnection            *connection,
 422                                                                const gchar                *object_path,
 423                                                                const GDBusSubtreeVTable   *vtable,
 424                                                                GDBusSubtreeFlags           flags,
 425                                                                gpointer                    user_data,
 426                                                                GDestroyNotify              user_data_free_func,
 427                                                                GError                    **error);
 428 gboolean         g_dbus_connection_unregister_subtree         (GDBusConnection            *connection,
 429                                                                guint                       registration_id);
 430
 431 /* ---------------------------------------------------------------------------------------------------- */
 432
 433 /**
 434  * GDBusSignalCallback:
 435  * @connection: A #GDBusConnection.
 436  * @sender_name: The unique bus name of the sender of the signal.
 437  * @object_path: The object path that the signal was emitted on.
 438  * @interface_name: The name of the interface.
 439  * @signal_name: The name of the signal.
 440  * @parameters: A #GVariant tuple with parameters for the signal.
 441  * @user_data: User data passed when subscribing to the signal.
 442  *
 443  * Signature for callback function used in g_dbus_connection_signal_subscribe().
 444  *
 445  * Since: 2.26
 446  */
 447 typedef void (*GDBusSignalCallback) (GDBusConnection  *connection,
 448                                      const gchar      *sender_name,
 449                                      const gchar      *object_path,
 450                                      const gchar      *interface_name,
 451                                      const gchar      *signal_name,
 452                                      GVariant         *parameters,
 453                                      gpointer          user_data);
 454
 455 guint            g_dbus_connection_signal_subscribe           (GDBusConnection     *connection,
 456                                                                const gchar         *sender,
 457                                                                const gchar         *interface_name,
 458                                                                const gchar         *member,
 459                                                                const gchar         *object_path,
 460                                                                const gchar         *arg0,
 461                                                                GDBusSignalFlags     flags,
 462                                                                GDBusSignalCallback  callback,
 463                                                                gpointer             user_data,
 464                                                                GDestroyNotify       user_data_free_func);
 465 void             g_dbus_connection_signal_unsubscribe         (GDBusConnection     *connection,
 466                                                                guint                subscription_id);
 467
 468 /* ---------------------------------------------------------------------------------------------------- */
 469
 470 /**
 471  * GDBusMessageFilterFunction:
 472  * @connection: (transfer none): A #GDBusConnection.
 473  * @message: (transfer full): A locked #GDBusMessage that the filter function takes ownership of.
 474  * @incoming: %TRUE if it is a message received from the other peer, %FALSE if it is
 475  * a message to be sent to the other peer.
 476  * @user_data: User data passed when adding the filter.
 477  *
 478  * Signature for function used in g_dbus_connection_add_filter().
 479  *
 480  * A filter function is passed a #GDBusMessage and expected to return
 481  * a #GDBusMessage too. Passive filter functions that don't modify the
 482  * message can simply return the @message object:
 483  * |[
 484  * static GDBusMessage *
 485  * passive_filter (GDBusConnection *connection
 486  *                 GDBusMessage    *message,
 487  *                 gboolean         incoming,
 488  *                 gpointer         user_data)
 489  * {
 490  *   /<!-- -->* inspect @message *<!-- -->/
 491  *   return message;
 492  * }
 493  * ]|
 494  * Filter functions that wants to drop a message can simply return %NULL:
 495  * |[
 496  * static GDBusMessage *
 497  * drop_filter (GDBusConnection *connection
 498  *              GDBusMessage    *message,
 499  *              gboolean         incoming,
 500  *              gpointer         user_data)
 501  * {
 502  *   if (should_drop_message)
 503  *     {
 504  *       g_object_unref (message);
 505  *       message = NULL;
 506  *     }
 507  *   return message;
 508  * }
 509  * ]|
 510  * Finally, a filter function may modify a message by copying it:
 511  * |[
 512  * static GDBusMessage *
 513  * modifying_filter (GDBusConnection *connection
 514  *                   GDBusMessage    *message,
 515  *                   gboolean         incoming,
 516  *                   gpointer         user_data)
 517  * {
 518  *   GDBusMessage *copy;
 519  *   GError *error;
 520  *
 521  *   error = NULL;
 522  *   copy = g_dbus_message_copy (message, &error);
 523  *   /<!-- -->* handle @error being is set *<!-- -->/
 524  *   g_object_unref (message);
 525  *
 526  *   /<!-- -->* modify @copy *<!-- -->/
 527  *
 528  *   return copy;
 529  * }
 530  * ]|
 531  * If the returned #GDBusMessage is different from @message and the
 532  * serial number is unset (e.g. zero), then @message's serial number
 533  * will be used on the returned message (so in this case the returned
 534  * message must be unlocked). Additionally, if the returned message
 535  * cannot be sent on @connection, then a warning is logged to
 536  * <emphasis>standard error</emphasis>.
 537  *
 538  * Returns: (transfer full) (allow-none): A #GDBusMessage that will be freed with
 539  * g_object_unref() or %NULL to drop the message. Passive filter
 540  * functions can simply return the passed @message object.
 541  *
 542  * Since: 2.26
 543  */
 544 typedef GDBusMessage *(*GDBusMessageFilterFunction) (GDBusConnection *connection,
 545                                                      GDBusMessage    *message,
 546                                                      gboolean         incoming,
 547                                                      gpointer         user_data);
 548
 549 guint g_dbus_connection_add_filter (GDBusConnection            *connection,
 550                                     GDBusMessageFilterFunction  filter_function,
 551                                     gpointer                    user_data,
 552                                     GDestroyNotify              user_data_free_func);
 553
 554 void  g_dbus_connection_remove_filter (GDBusConnection    *connection,
 555                                        guint               filter_id);
 556
 557 /* ---------------------------------------------------------------------------------------------------- */
 558
 559
 560 G_END_DECLS
 561
 562 #endif /* __G_DBUS_CONNECTION_H__ */