mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2024-09-20 09:16:15 +02:00
7d02e32644
Right now this can only be set at construction but not read back. That seems unnecessarily restrictive, and we'll need to read these flags from outside of gdbusconnection.c in the next commit, so let's just make it public. https://gitlab.gnome.org/GNOME/glib/issues/1620
684 lines
38 KiB
C
684 lines
38 KiB
C
/* GDBus - GLib D-Bus Library
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*
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* Copyright (C) 2008-2010 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: David Zeuthen <davidz@redhat.com>
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*/
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#ifndef __G_DBUS_CONNECTION_H__
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#define __G_DBUS_CONNECTION_H__
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#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
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#error "Only <gio/gio.h> can be included directly."
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#endif
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#include <gio/giotypes.h>
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G_BEGIN_DECLS
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#define G_TYPE_DBUS_CONNECTION (g_dbus_connection_get_type ())
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#define G_DBUS_CONNECTION(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_DBUS_CONNECTION, GDBusConnection))
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#define G_IS_DBUS_CONNECTION(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_DBUS_CONNECTION))
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GLIB_AVAILABLE_IN_ALL
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GType g_dbus_connection_get_type (void) G_GNUC_CONST;
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/* ---------------------------------------------------------------------------------------------------- */
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GLIB_AVAILABLE_IN_ALL
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void g_bus_get (GBusType bus_type,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_ALL
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GDBusConnection *g_bus_get_finish (GAsyncResult *res,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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GDBusConnection *g_bus_get_sync (GBusType bus_type,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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GLIB_AVAILABLE_IN_ALL
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void g_dbus_connection_new (GIOStream *stream,
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const gchar *guid,
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GDBusConnectionFlags flags,
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GDBusAuthObserver *observer,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_ALL
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GDBusConnection *g_dbus_connection_new_finish (GAsyncResult *res,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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GDBusConnection *g_dbus_connection_new_sync (GIOStream *stream,
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const gchar *guid,
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GDBusConnectionFlags flags,
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GDBusAuthObserver *observer,
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GCancellable *cancellable,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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void g_dbus_connection_new_for_address (const gchar *address,
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GDBusConnectionFlags flags,
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GDBusAuthObserver *observer,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_ALL
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GDBusConnection *g_dbus_connection_new_for_address_finish (GAsyncResult *res,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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GDBusConnection *g_dbus_connection_new_for_address_sync (const gchar *address,
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GDBusConnectionFlags flags,
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GDBusAuthObserver *observer,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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GLIB_AVAILABLE_IN_ALL
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void g_dbus_connection_start_message_processing (GDBusConnection *connection);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_dbus_connection_is_closed (GDBusConnection *connection);
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GLIB_AVAILABLE_IN_ALL
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GIOStream *g_dbus_connection_get_stream (GDBusConnection *connection);
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GLIB_AVAILABLE_IN_ALL
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const gchar *g_dbus_connection_get_guid (GDBusConnection *connection);
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GLIB_AVAILABLE_IN_ALL
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const gchar *g_dbus_connection_get_unique_name (GDBusConnection *connection);
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GLIB_AVAILABLE_IN_ALL
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GCredentials *g_dbus_connection_get_peer_credentials (GDBusConnection *connection);
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GLIB_AVAILABLE_IN_2_34
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guint32 g_dbus_connection_get_last_serial (GDBusConnection *connection);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_dbus_connection_get_exit_on_close (GDBusConnection *connection);
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GLIB_AVAILABLE_IN_ALL
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void g_dbus_connection_set_exit_on_close (GDBusConnection *connection,
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gboolean exit_on_close);
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GLIB_AVAILABLE_IN_ALL
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GDBusCapabilityFlags g_dbus_connection_get_capabilities (GDBusConnection *connection);
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GLIB_AVAILABLE_IN_2_60
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GDBusConnectionFlags g_dbus_connection_get_flags (GDBusConnection *connection);
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/* ---------------------------------------------------------------------------------------------------- */
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GLIB_AVAILABLE_IN_ALL
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void g_dbus_connection_close (GDBusConnection *connection,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_dbus_connection_close_finish (GDBusConnection *connection,
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GAsyncResult *res,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_dbus_connection_close_sync (GDBusConnection *connection,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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GLIB_AVAILABLE_IN_ALL
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void g_dbus_connection_flush (GDBusConnection *connection,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_dbus_connection_flush_finish (GDBusConnection *connection,
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GAsyncResult *res,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_dbus_connection_flush_sync (GDBusConnection *connection,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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GLIB_AVAILABLE_IN_ALL
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gboolean g_dbus_connection_send_message (GDBusConnection *connection,
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GDBusMessage *message,
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GDBusSendMessageFlags flags,
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volatile guint32 *out_serial,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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void g_dbus_connection_send_message_with_reply (GDBusConnection *connection,
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GDBusMessage *message,
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GDBusSendMessageFlags flags,
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gint timeout_msec,
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volatile guint32 *out_serial,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_ALL
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GDBusMessage *g_dbus_connection_send_message_with_reply_finish (GDBusConnection *connection,
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GAsyncResult *res,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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GDBusMessage *g_dbus_connection_send_message_with_reply_sync (GDBusConnection *connection,
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GDBusMessage *message,
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GDBusSendMessageFlags flags,
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gint timeout_msec,
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volatile guint32 *out_serial,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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GLIB_AVAILABLE_IN_ALL
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gboolean g_dbus_connection_emit_signal (GDBusConnection *connection,
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const gchar *destination_bus_name,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *signal_name,
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GVariant *parameters,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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void g_dbus_connection_call (GDBusConnection *connection,
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const gchar *bus_name,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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const GVariantType *reply_type,
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GDBusCallFlags flags,
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gint timeout_msec,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_ALL
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GVariant *g_dbus_connection_call_finish (GDBusConnection *connection,
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GAsyncResult *res,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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GVariant *g_dbus_connection_call_sync (GDBusConnection *connection,
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const gchar *bus_name,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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const GVariantType *reply_type,
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GDBusCallFlags flags,
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gint timeout_msec,
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GCancellable *cancellable,
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GError **error);
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GLIB_AVAILABLE_IN_2_30
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void g_dbus_connection_call_with_unix_fd_list (GDBusConnection *connection,
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const gchar *bus_name,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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const GVariantType *reply_type,
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GDBusCallFlags flags,
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gint timeout_msec,
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GUnixFDList *fd_list,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_2_30
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GVariant *g_dbus_connection_call_with_unix_fd_list_finish (GDBusConnection *connection,
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GUnixFDList **out_fd_list,
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GAsyncResult *res,
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GError **error);
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GLIB_AVAILABLE_IN_2_30
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GVariant *g_dbus_connection_call_with_unix_fd_list_sync (GDBusConnection *connection,
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const gchar *bus_name,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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const GVariantType *reply_type,
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GDBusCallFlags flags,
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gint timeout_msec,
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GUnixFDList *fd_list,
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GUnixFDList **out_fd_list,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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/**
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* GDBusInterfaceMethodCallFunc:
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* @connection: A #GDBusConnection.
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* @sender: The unique bus name of the remote caller.
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* @object_path: The object path that the method was invoked on.
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* @interface_name: The D-Bus interface name the method was invoked on.
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* @method_name: The name of the method that was invoked.
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* @parameters: A #GVariant tuple with parameters.
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* @invocation: (transfer full): A #GDBusMethodInvocation object that must be used to return a value or error.
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* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
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*
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* The type of the @method_call function in #GDBusInterfaceVTable.
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*
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* Since: 2.26
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*/
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typedef void (*GDBusInterfaceMethodCallFunc) (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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GDBusMethodInvocation *invocation,
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gpointer user_data);
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/**
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* GDBusInterfaceGetPropertyFunc:
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* @connection: A #GDBusConnection.
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* @sender: The unique bus name of the remote caller.
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* @object_path: The object path that the method was invoked on.
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* @interface_name: The D-Bus interface name for the property.
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* @property_name: The name of the property to get the value of.
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* @error: Return location for error.
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* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
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*
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* The type of the @get_property function in #GDBusInterfaceVTable.
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*
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* Returns: A #GVariant with the value for @property_name or %NULL if
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* @error is set. If the returned #GVariant is floating, it is
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* consumed - otherwise its reference count is decreased by one.
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*
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* Since: 2.26
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*/
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typedef GVariant *(*GDBusInterfaceGetPropertyFunc) (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *property_name,
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GError **error,
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gpointer user_data);
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/**
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* GDBusInterfaceSetPropertyFunc:
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* @connection: A #GDBusConnection.
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* @sender: The unique bus name of the remote caller.
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* @object_path: The object path that the method was invoked on.
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* @interface_name: The D-Bus interface name for the property.
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* @property_name: The name of the property to get the value of.
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* @value: The value to set the property to.
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* @error: Return location for error.
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* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
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*
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* The type of the @set_property function in #GDBusInterfaceVTable.
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*
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* Returns: %TRUE if the property was set to @value, %FALSE if @error is set.
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*
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* Since: 2.26
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*/
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typedef gboolean (*GDBusInterfaceSetPropertyFunc) (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *property_name,
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GVariant *value,
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GError **error,
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gpointer user_data);
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/**
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* GDBusInterfaceVTable:
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* @method_call: Function for handling incoming method calls.
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* @get_property: Function for getting a property.
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* @set_property: Function for setting a property.
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*
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* Virtual table for handling properties and method calls for a D-Bus
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* interface.
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*
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* Since 2.38, if you want to handle getting/setting D-Bus properties
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* asynchronously, give %NULL as your get_property() or set_property()
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* function. The D-Bus call will be directed to your @method_call function,
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* with the provided @interface_name set to "org.freedesktop.DBus.Properties".
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*
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* Ownership of the #GDBusMethodInvocation object passed to the
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* method_call() function is transferred to your handler; you must
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* call one of the methods of #GDBusMethodInvocation to return a reply
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* (possibly empty), or an error. These functions also take ownership
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* of the passed-in invocation object, so unless the invocation
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* object has otherwise been referenced, it will be then be freed.
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* Calling one of these functions may be done within your
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* method_call() implementation but it also can be done at a later
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* point to handle the method asynchronously.
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*
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* The usual checks on the validity of the calls is performed. For
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* `Get` calls, an error is automatically returned if the property does
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* not exist or the permissions do not allow access. The same checks are
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* performed for `Set` calls, and the provided value is also checked for
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* being the correct type.
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*
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* For both `Get` and `Set` calls, the #GDBusMethodInvocation
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* passed to the @method_call handler can be queried with
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* g_dbus_method_invocation_get_property_info() to get a pointer
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* to the #GDBusPropertyInfo of the property.
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*
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* If you have readable properties specified in your interface info,
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* you must ensure that you either provide a non-%NULL @get_property()
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* function or provide implementations of both the `Get` and `GetAll`
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* methods on org.freedesktop.DBus.Properties interface in your @method_call
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* function. Note that the required return type of the `Get` call is
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* `(v)`, not the type of the property. `GetAll` expects a return value
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* of type `a{sv}`.
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*
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* If you have writable properties specified in your interface info,
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* you must ensure that you either provide a non-%NULL @set_property()
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* function or provide an implementation of the `Set` call. If implementing
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* the call, you must return the value of type %G_VARIANT_TYPE_UNIT.
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*
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* Since: 2.26
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*/
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struct _GDBusInterfaceVTable
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{
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GDBusInterfaceMethodCallFunc method_call;
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GDBusInterfaceGetPropertyFunc get_property;
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GDBusInterfaceSetPropertyFunc set_property;
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/*< private >*/
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/* Padding for future expansion - also remember to update
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* gdbusconnection.c:_g_dbus_interface_vtable_copy() when
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* changing this.
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*/
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gpointer padding[8];
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};
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GLIB_AVAILABLE_IN_ALL
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guint g_dbus_connection_register_object (GDBusConnection *connection,
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const gchar *object_path,
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GDBusInterfaceInfo *interface_info,
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const GDBusInterfaceVTable *vtable,
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gpointer user_data,
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GDestroyNotify user_data_free_func,
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GError **error);
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GLIB_AVAILABLE_IN_2_46
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guint g_dbus_connection_register_object_with_closures (GDBusConnection *connection,
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const gchar *object_path,
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GDBusInterfaceInfo *interface_info,
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GClosure *method_call_closure,
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GClosure *get_property_closure,
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GClosure *set_property_closure,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_dbus_connection_unregister_object (GDBusConnection *connection,
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guint registration_id);
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/* ---------------------------------------------------------------------------------------------------- */
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/**
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* GDBusSubtreeEnumerateFunc:
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* @connection: A #GDBusConnection.
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* @sender: The unique bus name of the remote caller.
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* @object_path: The object path that was registered with g_dbus_connection_register_subtree().
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* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
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*
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* The type of the @enumerate function in #GDBusSubtreeVTable.
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*
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* This function is called when generating introspection data and also
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* when preparing to dispatch incoming messages in the event that the
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* %G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES flag is not
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* specified (ie: to verify that the object path is valid).
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*
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* Hierarchies are not supported; the items that you return should not
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* contain the '/' character.
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*
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* The return value will be freed with g_strfreev().
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*
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* Returns: A newly allocated array of strings for node names that are children of @object_path.
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*
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* Since: 2.26
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*/
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typedef gchar** (*GDBusSubtreeEnumerateFunc) (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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gpointer user_data);
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/**
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* GDBusSubtreeIntrospectFunc:
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* @connection: A #GDBusConnection.
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* @sender: The unique bus name of the remote caller.
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* @object_path: The object path that was registered with g_dbus_connection_register_subtree().
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* @node: A node that is a child of @object_path (relative to @object_path) or %NULL for the root of the subtree.
|
|
* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
|
|
*
|
|
* The type of the @introspect function in #GDBusSubtreeVTable.
|
|
*
|
|
* Subtrees are flat. @node, if non-%NULL, is always exactly one
|
|
* segment of the object path (ie: it never contains a slash).
|
|
*
|
|
* This function should return %NULL to indicate that there is no object
|
|
* at this node.
|
|
*
|
|
* If this function returns non-%NULL, the return value is expected to
|
|
* be a %NULL-terminated array of pointers to #GDBusInterfaceInfo
|
|
* structures describing the interfaces implemented by @node. This
|
|
* array will have g_dbus_interface_info_unref() called on each item
|
|
* before being freed with g_free().
|
|
*
|
|
* The difference between returning %NULL and an array containing zero
|
|
* items is that the standard DBus interfaces will returned to the
|
|
* remote introspector in the empty array case, but not in the %NULL
|
|
* case.
|
|
*
|
|
* Returns: A %NULL-terminated array of pointers to #GDBusInterfaceInfo, or %NULL.
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
typedef GDBusInterfaceInfo ** (*GDBusSubtreeIntrospectFunc) (GDBusConnection *connection,
|
|
const gchar *sender,
|
|
const gchar *object_path,
|
|
const gchar *node,
|
|
gpointer user_data);
|
|
|
|
/**
|
|
* GDBusSubtreeDispatchFunc:
|
|
* @connection: A #GDBusConnection.
|
|
* @sender: The unique bus name of the remote caller.
|
|
* @object_path: The object path that was registered with g_dbus_connection_register_subtree().
|
|
* @interface_name: The D-Bus interface name that the method call or property access is for.
|
|
* @node: A node that is a child of @object_path (relative to @object_path) or %NULL for the root of the subtree.
|
|
* @out_user_data: (nullable) (not optional): Return location for user data to pass to functions in the returned #GDBusInterfaceVTable (never %NULL).
|
|
* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
|
|
*
|
|
* The type of the @dispatch function in #GDBusSubtreeVTable.
|
|
*
|
|
* Subtrees are flat. @node, if non-%NULL, is always exactly one
|
|
* segment of the object path (ie: it never contains a slash).
|
|
*
|
|
* Returns: A #GDBusInterfaceVTable or %NULL if you don't want to handle the methods.
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
typedef const GDBusInterfaceVTable * (*GDBusSubtreeDispatchFunc) (GDBusConnection *connection,
|
|
const gchar *sender,
|
|
const gchar *object_path,
|
|
const gchar *interface_name,
|
|
const gchar *node,
|
|
gpointer *out_user_data,
|
|
gpointer user_data);
|
|
|
|
/**
|
|
* GDBusSubtreeVTable:
|
|
* @enumerate: Function for enumerating child nodes.
|
|
* @introspect: Function for introspecting a child node.
|
|
* @dispatch: Function for dispatching a remote call on a child node.
|
|
*
|
|
* Virtual table for handling subtrees registered with g_dbus_connection_register_subtree().
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
struct _GDBusSubtreeVTable
|
|
{
|
|
GDBusSubtreeEnumerateFunc enumerate;
|
|
GDBusSubtreeIntrospectFunc introspect;
|
|
GDBusSubtreeDispatchFunc dispatch;
|
|
|
|
/*< private >*/
|
|
/* Padding for future expansion - also remember to update
|
|
* gdbusconnection.c:_g_dbus_subtree_vtable_copy() when
|
|
* changing this.
|
|
*/
|
|
gpointer padding[8];
|
|
};
|
|
|
|
GLIB_AVAILABLE_IN_ALL
|
|
guint g_dbus_connection_register_subtree (GDBusConnection *connection,
|
|
const gchar *object_path,
|
|
const GDBusSubtreeVTable *vtable,
|
|
GDBusSubtreeFlags flags,
|
|
gpointer user_data,
|
|
GDestroyNotify user_data_free_func,
|
|
GError **error);
|
|
GLIB_AVAILABLE_IN_ALL
|
|
gboolean g_dbus_connection_unregister_subtree (GDBusConnection *connection,
|
|
guint registration_id);
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/**
|
|
* GDBusSignalCallback:
|
|
* @connection: A #GDBusConnection.
|
|
* @sender_name: The unique bus name of the sender of the signal.
|
|
* @object_path: The object path that the signal was emitted on.
|
|
* @interface_name: The name of the interface.
|
|
* @signal_name: The name of the signal.
|
|
* @parameters: A #GVariant tuple with parameters for the signal.
|
|
* @user_data: User data passed when subscribing to the signal.
|
|
*
|
|
* Signature for callback function used in g_dbus_connection_signal_subscribe().
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
typedef void (*GDBusSignalCallback) (GDBusConnection *connection,
|
|
const gchar *sender_name,
|
|
const gchar *object_path,
|
|
const gchar *interface_name,
|
|
const gchar *signal_name,
|
|
GVariant *parameters,
|
|
gpointer user_data);
|
|
|
|
GLIB_AVAILABLE_IN_ALL
|
|
guint g_dbus_connection_signal_subscribe (GDBusConnection *connection,
|
|
const gchar *sender,
|
|
const gchar *interface_name,
|
|
const gchar *member,
|
|
const gchar *object_path,
|
|
const gchar *arg0,
|
|
GDBusSignalFlags flags,
|
|
GDBusSignalCallback callback,
|
|
gpointer user_data,
|
|
GDestroyNotify user_data_free_func);
|
|
GLIB_AVAILABLE_IN_ALL
|
|
void g_dbus_connection_signal_unsubscribe (GDBusConnection *connection,
|
|
guint subscription_id);
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/**
|
|
* GDBusMessageFilterFunction:
|
|
* @connection: (transfer none): A #GDBusConnection.
|
|
* @message: (transfer full): A locked #GDBusMessage that the filter function takes ownership of.
|
|
* @incoming: %TRUE if it is a message received from the other peer, %FALSE if it is
|
|
* a message to be sent to the other peer.
|
|
* @user_data: User data passed when adding the filter.
|
|
*
|
|
* Signature for function used in g_dbus_connection_add_filter().
|
|
*
|
|
* A filter function is passed a #GDBusMessage and expected to return
|
|
* a #GDBusMessage too. Passive filter functions that don't modify the
|
|
* message can simply return the @message object:
|
|
* |[
|
|
* static GDBusMessage *
|
|
* passive_filter (GDBusConnection *connection
|
|
* GDBusMessage *message,
|
|
* gboolean incoming,
|
|
* gpointer user_data)
|
|
* {
|
|
* // inspect @message
|
|
* return message;
|
|
* }
|
|
* ]|
|
|
* Filter functions that wants to drop a message can simply return %NULL:
|
|
* |[
|
|
* static GDBusMessage *
|
|
* drop_filter (GDBusConnection *connection
|
|
* GDBusMessage *message,
|
|
* gboolean incoming,
|
|
* gpointer user_data)
|
|
* {
|
|
* if (should_drop_message)
|
|
* {
|
|
* g_object_unref (message);
|
|
* message = NULL;
|
|
* }
|
|
* return message;
|
|
* }
|
|
* ]|
|
|
* Finally, a filter function may modify a message by copying it:
|
|
* |[
|
|
* static GDBusMessage *
|
|
* modifying_filter (GDBusConnection *connection
|
|
* GDBusMessage *message,
|
|
* gboolean incoming,
|
|
* gpointer user_data)
|
|
* {
|
|
* GDBusMessage *copy;
|
|
* GError *error;
|
|
*
|
|
* error = NULL;
|
|
* copy = g_dbus_message_copy (message, &error);
|
|
* // handle @error being set
|
|
* g_object_unref (message);
|
|
*
|
|
* // modify @copy
|
|
*
|
|
* return copy;
|
|
* }
|
|
* ]|
|
|
* If the returned #GDBusMessage is different from @message and cannot
|
|
* be sent on @connection (it could use features, such as file
|
|
* descriptors, not compatible with @connection), then a warning is
|
|
* logged to standard error. Applications can
|
|
* check this ahead of time using g_dbus_message_to_blob() passing a
|
|
* #GDBusCapabilityFlags value obtained from @connection.
|
|
*
|
|
* Returns: (transfer full) (nullable): A #GDBusMessage that will be freed with
|
|
* g_object_unref() or %NULL to drop the message. Passive filter
|
|
* functions can simply return the passed @message object.
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
typedef GDBusMessage *(*GDBusMessageFilterFunction) (GDBusConnection *connection,
|
|
GDBusMessage *message,
|
|
gboolean incoming,
|
|
gpointer user_data);
|
|
|
|
GLIB_AVAILABLE_IN_ALL
|
|
guint g_dbus_connection_add_filter (GDBusConnection *connection,
|
|
GDBusMessageFilterFunction filter_function,
|
|
gpointer user_data,
|
|
GDestroyNotify user_data_free_func);
|
|
|
|
GLIB_AVAILABLE_IN_ALL
|
|
void g_dbus_connection_remove_filter (GDBusConnection *connection,
|
|
guint filter_id);
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __G_DBUS_CONNECTION_H__ */
|