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|
/* GDBus - GLib D-Bus Library
*
* Copyright (C) 2008-2010 Red Hat, Inc.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: David Zeuthen <davidz@redhat.com>
*/
#ifndef __G_DBUS_CONNECTION_H__
#define __G_DBUS_CONNECTION_H__
#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
#error "Only <gio/gio.h> can be included directly."
#endif
#include <gio/giotypes.h>
G_BEGIN_DECLS
#define G_TYPE_DBUS_CONNECTION (g_dbus_connection_get_type ())
#define G_DBUS_CONNECTION(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_DBUS_CONNECTION, GDBusConnection))
#define G_IS_DBUS_CONNECTION(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_DBUS_CONNECTION))
GIO_AVAILABLE_IN_ALL
GType g_dbus_connection_get_type (void) G_GNUC_CONST;
/* ---------------------------------------------------------------------------------------------------- */
GIO_AVAILABLE_IN_ALL
void g_bus_get (GBusType bus_type,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GIO_AVAILABLE_IN_ALL
GDBusConnection *g_bus_get_finish (GAsyncResult *res,
GError **error);
GIO_AVAILABLE_IN_ALL
GDBusConnection *g_bus_get_sync (GBusType bus_type,
GCancellable *cancellable,
GError **error);
/* ---------------------------------------------------------------------------------------------------- */
GIO_AVAILABLE_IN_ALL
void g_dbus_connection_new (GIOStream *stream,
const gchar *guid,
GDBusConnectionFlags flags,
GDBusAuthObserver *observer,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GIO_AVAILABLE_IN_ALL
GDBusConnection *g_dbus_connection_new_finish (GAsyncResult *res,
GError **error);
GIO_AVAILABLE_IN_ALL
GDBusConnection *g_dbus_connection_new_sync (GIOStream *stream,
const gchar *guid,
GDBusConnectionFlags flags,
GDBusAuthObserver *observer,
GCancellable *cancellable,
GError **error);
GIO_AVAILABLE_IN_ALL
void g_dbus_connection_new_for_address (const gchar *address,
GDBusConnectionFlags flags,
GDBusAuthObserver *observer,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GIO_AVAILABLE_IN_ALL
GDBusConnection *g_dbus_connection_new_for_address_finish (GAsyncResult *res,
GError **error);
GIO_AVAILABLE_IN_ALL
GDBusConnection *g_dbus_connection_new_for_address_sync (const gchar *address,
GDBusConnectionFlags flags,
GDBusAuthObserver *observer,
GCancellable *cancellable,
GError **error);
/* ---------------------------------------------------------------------------------------------------- */
GIO_AVAILABLE_IN_ALL
void g_dbus_connection_start_message_processing (GDBusConnection *connection);
GIO_AVAILABLE_IN_ALL
gboolean g_dbus_connection_is_closed (GDBusConnection *connection);
GIO_AVAILABLE_IN_ALL
GIOStream *g_dbus_connection_get_stream (GDBusConnection *connection);
GIO_AVAILABLE_IN_ALL
const gchar *g_dbus_connection_get_guid (GDBusConnection *connection);
GIO_AVAILABLE_IN_ALL
const gchar *g_dbus_connection_get_unique_name (GDBusConnection *connection);
GIO_AVAILABLE_IN_ALL
GCredentials *g_dbus_connection_get_peer_credentials (GDBusConnection *connection);
GIO_AVAILABLE_IN_2_34
guint32 g_dbus_connection_get_last_serial (GDBusConnection *connection);
GIO_AVAILABLE_IN_ALL
gboolean g_dbus_connection_get_exit_on_close (GDBusConnection *connection);
GIO_AVAILABLE_IN_ALL
void g_dbus_connection_set_exit_on_close (GDBusConnection *connection,
gboolean exit_on_close);
GIO_AVAILABLE_IN_ALL
GDBusCapabilityFlags g_dbus_connection_get_capabilities (GDBusConnection *connection);
GIO_AVAILABLE_IN_2_60
GDBusConnectionFlags g_dbus_connection_get_flags (GDBusConnection *connection);
/* ---------------------------------------------------------------------------------------------------- */
GIO_AVAILABLE_IN_ALL
void g_dbus_connection_close (GDBusConnection *connection,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GIO_AVAILABLE_IN_ALL
gboolean g_dbus_connection_close_finish (GDBusConnection *connection,
GAsyncResult *res,
GError **error);
GIO_AVAILABLE_IN_ALL
gboolean g_dbus_connection_close_sync (GDBusConnection *connection,
GCancellable *cancellable,
GError **error);
/* ---------------------------------------------------------------------------------------------------- */
GIO_AVAILABLE_IN_ALL
void g_dbus_connection_flush (GDBusConnection *connection,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GIO_AVAILABLE_IN_ALL
gboolean g_dbus_connection_flush_finish (GDBusConnection *connection,
GAsyncResult *res,
GError **error);
GIO_AVAILABLE_IN_ALL
gboolean g_dbus_connection_flush_sync (GDBusConnection *connection,
GCancellable *cancellable,
GError **error);
/* ---------------------------------------------------------------------------------------------------- */
GIO_AVAILABLE_IN_ALL
gboolean g_dbus_connection_send_message (GDBusConnection *connection,
GDBusMessage *message,
GDBusSendMessageFlags flags,
volatile guint32 *out_serial,
GError **error);
GIO_AVAILABLE_IN_ALL
void g_dbus_connection_send_message_with_reply (GDBusConnection *connection,
GDBusMessage *message,
GDBusSendMessageFlags flags,
gint timeout_msec,
volatile guint32 *out_serial,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GIO_AVAILABLE_IN_ALL
GDBusMessage *g_dbus_connection_send_message_with_reply_finish (GDBusConnection *connection,
GAsyncResult *res,
GError **error);
GIO_AVAILABLE_IN_ALL
GDBusMessage *g_dbus_connection_send_message_with_reply_sync (GDBusConnection *connection,
GDBusMessage *message,
GDBusSendMessageFlags flags,
gint timeout_msec,
volatile guint32 *out_serial,
GCancellable *cancellable,
GError **error);
/* ---------------------------------------------------------------------------------------------------- */
GIO_AVAILABLE_IN_ALL
gboolean g_dbus_connection_emit_signal (GDBusConnection *connection,
const gchar *destination_bus_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *signal_name,
GVariant *parameters,
GError **error);
GIO_AVAILABLE_IN_ALL
void g_dbus_connection_call (GDBusConnection *connection,
const gchar *bus_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *method_name,
GVariant *parameters,
const GVariantType *reply_type,
GDBusCallFlags flags,
gint timeout_msec,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GIO_AVAILABLE_IN_ALL
GVariant *g_dbus_connection_call_finish (GDBusConnection *connection,
GAsyncResult *res,
GError **error);
GIO_AVAILABLE_IN_ALL
GVariant *g_dbus_connection_call_sync (GDBusConnection *connection,
const gchar *bus_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *method_name,
GVariant *parameters,
const GVariantType *reply_type,
GDBusCallFlags flags,
gint timeout_msec,
GCancellable *cancellable,
GError **error);
#ifdef G_OS_UNIX
GIO_AVAILABLE_IN_2_30
void g_dbus_connection_call_with_unix_fd_list (GDBusConnection *connection,
const gchar *bus_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *method_name,
GVariant *parameters,
const GVariantType *reply_type,
GDBusCallFlags flags,
gint timeout_msec,
GUnixFDList *fd_list,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GIO_AVAILABLE_IN_2_30
GVariant *g_dbus_connection_call_with_unix_fd_list_finish (GDBusConnection *connection,
GUnixFDList **out_fd_list,
GAsyncResult *res,
GError **error);
GIO_AVAILABLE_IN_2_30
GVariant *g_dbus_connection_call_with_unix_fd_list_sync (GDBusConnection *connection,
const gchar *bus_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *method_name,
GVariant *parameters,
const GVariantType *reply_type,
GDBusCallFlags flags,
gint timeout_msec,
GUnixFDList *fd_list,
GUnixFDList **out_fd_list,
GCancellable *cancellable,
GError **error);
#endif /* G_OS_UNIX */
/* ---------------------------------------------------------------------------------------------------- */
/**
* GDBusInterfaceMethodCallFunc:
* @connection: A #GDBusConnection.
* @sender: The unique bus name of the remote caller.
* @object_path: The object path that the method was invoked on.
* @interface_name: The D-Bus interface name the method was invoked on.
* @method_name: The name of the method that was invoked.
* @parameters: A #GVariant tuple with parameters.
* @invocation: (transfer full): A #GDBusMethodInvocation object that must be used to return a value or error.
* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
*
* The type of the @method_call function in #GDBusInterfaceVTable.
*
* Since: 2.26
*/
typedef void (*GDBusInterfaceMethodCallFunc) (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *method_name,
GVariant *parameters,
GDBusMethodInvocation *invocation,
gpointer user_data);
/**
* GDBusInterfaceGetPropertyFunc:
* @connection: A #GDBusConnection.
* @sender: The unique bus name of the remote caller.
* @object_path: The object path that the method was invoked on.
* @interface_name: The D-Bus interface name for the property.
* @property_name: The name of the property to get the value of.
* @error: Return location for error.
* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
*
* The type of the @get_property function in #GDBusInterfaceVTable.
*
* Returns: A #GVariant with the value for @property_name or %NULL if
* @error is set. If the returned #GVariant is floating, it is
* consumed - otherwise its reference count is decreased by one.
*
* Since: 2.26
*/
typedef GVariant *(*GDBusInterfaceGetPropertyFunc) (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *property_name,
GError **error,
gpointer user_data);
/**
* GDBusInterfaceSetPropertyFunc:
* @connection: A #GDBusConnection.
* @sender: The unique bus name of the remote caller.
* @object_path: The object path that the method was invoked on.
* @interface_name: The D-Bus interface name for the property.
* @property_name: The name of the property to get the value of.
* @value: The value to set the property to.
* @error: Return location for error.
* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
*
* The type of the @set_property function in #GDBusInterfaceVTable.
*
* Returns: %TRUE if the property was set to @value, %FALSE if @error is set.
*
* Since: 2.26
*/
typedef gboolean (*GDBusInterfaceSetPropertyFunc) (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *property_name,
GVariant *value,
GError **error,
gpointer user_data);
/**
* GDBusInterfaceVTable:
* @method_call: Function for handling incoming method calls.
* @get_property: Function for getting a property.
* @set_property: Function for setting a property.
*
* Virtual table for handling properties and method calls for a D-Bus
* interface.
*
* Since 2.38, if you want to handle getting/setting D-Bus properties
* asynchronously, give %NULL as your get_property() or set_property()
* function. The D-Bus call will be directed to your @method_call function,
* with the provided @interface_name set to "org.freedesktop.DBus.Properties".
*
* Ownership of the #GDBusMethodInvocation object passed to the
* method_call() function is transferred to your handler; you must
* call one of the methods of #GDBusMethodInvocation to return a reply
* (possibly empty), or an error. These functions also take ownership
* of the passed-in invocation object, so unless the invocation
* object has otherwise been referenced, it will be then be freed.
* Calling one of these functions may be done within your
* method_call() implementation but it also can be done at a later
* point to handle the method asynchronously.
*
* The usual checks on the validity of the calls is performed. For
* `Get` calls, an error is automatically returned if the property does
* not exist or the permissions do not allow access. The same checks are
* performed for `Set` calls, and the provided value is also checked for
* being the correct type.
*
* For both `Get` and `Set` calls, the #GDBusMethodInvocation
* passed to the @method_call handler can be queried with
* g_dbus_method_invocation_get_property_info() to get a pointer
* to the #GDBusPropertyInfo of the property.
*
* If you have readable properties specified in your interface info,
* you must ensure that you either provide a non-%NULL @get_property()
* function or provide implementations of both the `Get` and `GetAll`
* methods on org.freedesktop.DBus.Properties interface in your @method_call
* function. Note that the required return type of the `Get` call is
* `(v)`, not the type of the property. `GetAll` expects a return value
* of type `a{sv}`.
*
* If you have writable properties specified in your interface info,
* you must ensure that you either provide a non-%NULL @set_property()
* function or provide an implementation of the `Set` call. If implementing
* the call, you must return the value of type %G_VARIANT_TYPE_UNIT.
*
* Since: 2.26
*/
struct _GDBusInterfaceVTable
{
GDBusInterfaceMethodCallFunc method_call;
GDBusInterfaceGetPropertyFunc get_property;
GDBusInterfaceSetPropertyFunc set_property;
/*< private >*/
/* Padding for future expansion - also remember to update
* gdbusconnection.c:_g_dbus_interface_vtable_copy() when
* changing this.
*/
gpointer padding[8];
};
GIO_AVAILABLE_IN_ALL
guint g_dbus_connection_register_object (GDBusConnection *connection,
const gchar *object_path,
GDBusInterfaceInfo *interface_info,
const GDBusInterfaceVTable *vtable,
gpointer user_data,
GDestroyNotify user_data_free_func,
GError **error);
GIO_AVAILABLE_IN_2_46
guint g_dbus_connection_register_object_with_closures (GDBusConnection *connection,
const gchar *object_path,
GDBusInterfaceInfo *interface_info,
GClosure *method_call_closure,
GClosure *get_property_closure,
GClosure *set_property_closure,
GError **error);
GIO_AVAILABLE_IN_ALL
gboolean g_dbus_connection_unregister_object (GDBusConnection *connection,
guint registration_id);
/* ---------------------------------------------------------------------------------------------------- */
/**
* GDBusSubtreeEnumerateFunc:
* @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().
* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
*
* The type of the @enumerate function in #GDBusSubtreeVTable.
*
* This function is called when generating introspection data and also
* when preparing to dispatch incoming messages in the event that the
* %G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES flag is not
* specified (ie: to verify that the object path is valid).
*
* Hierarchies are not supported; the items that you return should not
* contain the `/` character.
*
* The return value will be freed with g_strfreev().
*
* Returns: (array zero-terminated=1) (transfer full): A newly allocated array of strings for node names that are children of @object_path.
*
* Since: 2.26
*/
typedef gchar** (*GDBusSubtreeEnumerateFunc) (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
gpointer user_data);
/**
* GDBusSubtreeIntrospectFunc:
* @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().
* @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: (array zero-terminated=1) (nullable) (transfer full): 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.
* @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: (nullable): 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];
};
GIO_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);
GIO_AVAILABLE_IN_ALL
gboolean g_dbus_connection_unregister_subtree (GDBusConnection *connection,
guint registration_id);
/* ---------------------------------------------------------------------------------------------------- */
/**
* GDBusSignalCallback:
* @connection: A #GDBusConnection.
* @sender_name: (nullable): The unique bus name of the sender of the signal,
or %NULL on a peer-to-peer D-Bus connection.
* @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);
GIO_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);
GIO_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);
GIO_AVAILABLE_IN_ALL
guint g_dbus_connection_add_filter (GDBusConnection *connection,
GDBusMessageFilterFunction filter_function,
gpointer user_data,
GDestroyNotify user_data_free_func);
GIO_AVAILABLE_IN_ALL
void g_dbus_connection_remove_filter (GDBusConnection *connection,
guint filter_id);
/* ---------------------------------------------------------------------------------------------------- */
G_END_DECLS
#endif /* __G_DBUS_CONNECTION_H__ */
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