1 /* GDBus - GLib D-Bus Library
3 * Copyright (C) 2008-2010 Red Hat, Inc.
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.
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.
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.
20 * Author: David Zeuthen <davidz@redhat.com>
26 * - would be nice to expose GDBusAuthMechanism and an extension point
28 * - Need to rewrite GDBusAuth and rework GDBusAuthMechanism. In particular
29 * the mechanism VFuncs need to be able to set an error.
31 * - Need to document other mechanisms/sources for determining the D-Bus
32 * address of a well-known bus.
34 * - e.g. on Win32 we need code like from here
36 * http://cgit.freedesktop.org/~david/gdbus-standalone/tree/gdbus/gdbusaddress.c#n900
38 * that was never copied over here because it originally was copy-paste
39 * from the GPLv2 / AFL 2.1 libdbus sources.
41 * - on OS X we need to look in launchd for the address
43 * https://bugs.freedesktop.org/show_bug.cgi?id=14259
45 * - on X11 we need to look in a X11 property on the X server
46 * - (we can also just use dbus-launch(1) from the D-Bus
49 * - (ideally) this requires D-Bus spec work because none of
50 * this has never really been specced out properly (excect
53 * - Related to the above, we also need to be able to launch a message bus
54 * instance.... Since we don't want to write our own bus daemon we should
55 * launch dbus-daemon(1) (thus: Win32 and OS X need to bundle it)
57 * - probably want a G_DBUS_NONCE_TCP_TMPDIR environment variable
58 * to specify where the nonce is stored. This will allow people to use
59 * G_DBUS_NONCE_TCP_TMPDIR=/mnt/secure.company.server/dbus-nonce-dir
60 * to easily acheive secure RPC via nonce-tcp.
62 * - need to expose an extension point for resolving D-Bus address and
63 * turning them into GIOStream objects. This will allow us to implement
64 * e.g. X11 D-Bus transports without dlopen()'ing or linking against
66 * - see g_dbus_address_connect() in gdbusaddress.c
68 * - would be cute to use kernel-specific APIs to resolve fds for
69 * debug output when using G_DBUS_DEBUG=message, e.g. in addition to
71 * fd 21: dev=8:1,mode=0100644,ino=1171231,uid=0,gid=0,rdev=0:0,size=234,atime=1273070640,mtime=1267126160,ctime=1267126160
73 * maybe we can show more information about what fd 21 really is.
74 * Ryan suggests looking in /proc/self/fd for clues / symlinks!
75 * Initial experiments on Linux 2.6 suggests that the symlink looks
80 * e.g. not of much use.
82 * - GDBus High-Level docs
83 * - Proxy: properties, signals...
84 * - Connection: IOStream based, ::close, connection setup steps
85 * mainloop integration, threading
86 * - Differences from libdbus (extend "Migrating from")
87 * - the message handling thread
88 * - Using GVariant instead of GValue
89 * - Explain why the high-level API is a good thing and what
90 * kind of pitfalls it avoids
91 * - Export objects before claiming names
92 * - Talk about auto-starting services (cf. GBusNameWatcherFlags)
94 * - use abstract sockets in test code
95 * - right now it doesn't work, dbus-daemon(1) fails with
97 * /gdbus/connection/filter: Failed to start message bus: Failed to bind
98 * socket "/tmp/g-dbus-tests-pid-28531": Address already in use
99 * ** WARNING **: Error reading address from dbus daemon, 0 bytes read
108 #include <sys/types.h>
113 #include "gdbusauth.h"
114 #include "gdbusutils.h"
115 #include "gdbusaddress.h"
116 #include "gdbusmessage.h"
117 #include "gdbusconnection.h"
118 #include "gdbuserror.h"
119 #include "gioenumtypes.h"
120 #include "gdbusintrospection.h"
121 #include "gdbusmethodinvocation.h"
122 #include "gdbusprivate.h"
123 #include "gdbusauthobserver.h"
124 #include "gio-marshal.h"
125 #include "ginitable.h"
126 #include "gasyncinitable.h"
127 #include "giostream.h"
128 #include "gasyncresult.h"
129 #include "gsimpleasyncresult.h"
132 #include "gunixconnection.h"
133 #include "gunixfdmessage.h"
136 #include "glibintl.h"
139 * SECTION:gdbusconnection
140 * @short_description: D-Bus Connections
141 * @include: gio/gio.h
143 * The #GDBusConnection type is used for D-Bus connections to remote
144 * peers such as a message buses. It is a low-level API that offers a
145 * lot of flexibility. For instance, it lets you establish a connection
146 * over any transport that can by represented as an #GIOStream.
148 * This class is rarely used directly in D-Bus clients. If you are writing
149 * an D-Bus client, it is often easier to use the g_bus_own_name(),
150 * g_bus_watch_name() or g_dbus_proxy_new_for_bus() APIs.
152 * <example id="gdbus-server"><title>D-Bus server example</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-server.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
154 * <example id="gdbus-subtree-server"><title>D-Bus subtree example</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-subtree.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
156 * <example id="gdbus-unix-fd-client"><title>D-Bus UNIX File Descriptor example</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-unix-fd-client.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
158 * <example id="gdbus-export"><title>Exporting a GObject</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-export.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
161 /* ---------------------------------------------------------------------------------------------------- */
163 typedef struct _GDBusConnectionClass GDBusConnectionClass;
166 * GDBusConnectionClass:
167 * @closed: Signal class handler for the #GDBusConnection::closed signal.
169 * Class structure for #GDBusConnection.
173 struct _GDBusConnectionClass
176 GObjectClass parent_class;
180 void (*closed) (GDBusConnection *connection,
181 gboolean remote_peer_vanished,
185 G_LOCK_DEFINE_STATIC (message_bus_lock);
187 static GDBusConnection *the_session_bus = NULL;
188 static GDBusConnection *the_system_bus = NULL;
190 /* ---------------------------------------------------------------------------------------------------- */
194 GDestroyNotify callback;
196 GMainContext *context;
197 } CallDestroyNotifyData;
200 call_destroy_notify_data_in_idle (gpointer user_data)
202 CallDestroyNotifyData *data = user_data;
203 data->callback (data->user_data);
208 call_destroy_notify_data_free (CallDestroyNotifyData *data)
210 if (data->context != NULL)
211 g_main_context_unref (data->context);
216 * call_destroy_notify: <internal>
217 * @context: A #GMainContext or %NULL.
218 * @callback: A #GDestroyNotify or %NULL.
219 * @user_data: Data to pass to @callback.
221 * Schedules @callback to run in @context.
224 call_destroy_notify (GMainContext *context,
225 GDestroyNotify callback,
228 if (callback == NULL)
231 if (context == g_main_context_get_thread_default ())
233 callback (user_data);
237 GSource *idle_source;
238 CallDestroyNotifyData *data;
240 data = g_new0 (CallDestroyNotifyData, 1);
241 data->callback = callback;
242 data->user_data = user_data;
243 data->context = context;
244 if (data->context != NULL)
245 g_main_context_ref (data->context);
247 idle_source = g_idle_source_new ();
248 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
249 g_source_set_callback (idle_source,
250 call_destroy_notify_data_in_idle,
252 (GDestroyNotify) call_destroy_notify_data_free);
253 g_source_attach (idle_source, data->context);
254 g_source_unref (idle_source);
261 /* ---------------------------------------------------------------------------------------------------- */
264 _g_strv_has_string (const gchar* const *haystack,
269 for (n = 0; haystack != NULL && haystack[n] != NULL; n++)
271 if (g_strcmp0 (haystack[n], needle) == 0)
277 /* ---------------------------------------------------------------------------------------------------- */
280 #define CONNECTION_ENSURE_LOCK(obj) do { ; } while (FALSE)
282 // TODO: for some reason this doesn't work on Windows
283 #define CONNECTION_ENSURE_LOCK(obj) do { \
284 if (G_UNLIKELY (g_mutex_trylock((obj)->lock))) \
286 g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
287 "CONNECTION_ENSURE_LOCK: GDBusConnection object lock is not locked"); \
292 #define CONNECTION_LOCK(obj) do { \
293 g_mutex_lock ((obj)->lock); \
296 #define CONNECTION_UNLOCK(obj) do { \
297 g_mutex_unlock ((obj)->lock); \
303 * The #GDBusConnection structure contains only private data and
304 * should only be accessed using the provided API.
308 struct _GDBusConnection
311 GObject parent_instance;
313 /* ------------------------------------------------------------------------ */
314 /* -- General object state ------------------------------------------------ */
315 /* ------------------------------------------------------------------------ */
317 /* object-wide lock */
320 /* A lock used in the init() method of the GInitable interface - see comments
321 * in initable_init() for why a separate lock is needed
325 /* Set (by loading the contents of /var/lib/dbus/machine-id) the first time
326 * someone calls org.freedesktop.DBus.GetMachineId()
330 /* The underlying stream used for communication */
333 /* The object used for authentication (if any) */
336 /* Set to TRUE if the connection has been closed */
339 /* Last serial used */
342 /* The object used to send/receive message */
345 /* If connected to a message bus, this contains the unique name assigned to
346 * us by the bus (e.g. ":1.42")
348 gchar *bus_unique_name;
350 /* The GUID returned by the other side if we authenticed as a client or
351 * the GUID to use if authenticating as a server
355 /* set to TRUE exactly when initable_init() has finished running */
356 gboolean is_initialized;
358 /* If the connection could not be established during initable_init(), this GError will set */
359 GError *initialization_error;
361 /* The result of g_main_context_get_thread_default() when the object
362 * was created (the GObject _init() function) - this is used for delivery
363 * of the :closed GObject signal.
365 GMainContext *main_context_at_construction;
367 /* construct properties */
369 GDBusConnectionFlags flags;
371 /* Map used for managing method replies */
372 GHashTable *map_method_serial_to_send_message_data; /* guint32 -> SendMessageData* */
374 /* Maps used for managing signal subscription */
375 GHashTable *map_rule_to_signal_data; /* match rule (gchar*) -> SignalData */
376 GHashTable *map_id_to_signal_data; /* id (guint) -> SignalData */
377 GHashTable *map_sender_unique_name_to_signal_data_array; /* unique sender (gchar*) -> GPtrArray* of SignalData */
379 /* Maps used for managing exported objects and subtrees */
380 GHashTable *map_object_path_to_eo; /* gchar* -> ExportedObject* */
381 GHashTable *map_id_to_ei; /* guint -> ExportedInterface* */
382 GHashTable *map_object_path_to_es; /* gchar* -> ExportedSubtree* */
383 GHashTable *map_id_to_es; /* guint -> ExportedSubtree* */
385 /* Structure used for message filters */
388 /* Whether to exit on close */
389 gboolean exit_on_close;
391 /* Capabilities negotiated during authentication */
392 GDBusCapabilityFlags capabilities;
394 GDBusAuthObserver *authentication_observer;
395 GCredentials *credentials;
397 /* set to TRUE when finalizing */
401 typedef struct ExportedObject ExportedObject;
402 static void exported_object_free (ExportedObject *eo);
404 typedef struct ExportedSubtree ExportedSubtree;
405 static void exported_subtree_free (ExportedSubtree *es);
423 PROP_CAPABILITY_FLAGS,
424 PROP_AUTHENTICATION_OBSERVER,
427 static void distribute_signals (GDBusConnection *connection,
428 GDBusMessage *message);
430 static void distribute_method_call (GDBusConnection *connection,
431 GDBusMessage *message);
433 static gboolean handle_generic_unlocked (GDBusConnection *connection,
434 GDBusMessage *message);
437 static void purge_all_signal_subscriptions (GDBusConnection *connection);
438 static void purge_all_filters (GDBusConnection *connection);
440 #define _G_ENSURE_LOCK(name) do { \
441 if (G_UNLIKELY (G_TRYLOCK(name))) \
443 g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
444 "_G_ENSURE_LOCK: Lock `" #name "' is not locked"); \
448 static guint signals[LAST_SIGNAL] = { 0 };
450 static void initable_iface_init (GInitableIface *initable_iface);
451 static void async_initable_iface_init (GAsyncInitableIface *async_initable_iface);
453 G_DEFINE_TYPE_WITH_CODE (GDBusConnection, g_dbus_connection, G_TYPE_OBJECT,
454 G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, initable_iface_init)
455 G_IMPLEMENT_INTERFACE (G_TYPE_ASYNC_INITABLE, async_initable_iface_init)
458 static GHashTable *alive_connections = NULL;
461 g_dbus_connection_dispose (GObject *object)
463 GDBusConnection *connection = G_DBUS_CONNECTION (object);
465 G_LOCK (message_bus_lock);
466 if (connection == the_session_bus)
468 the_session_bus = NULL;
470 else if (connection == the_system_bus)
472 the_system_bus = NULL;
474 CONNECTION_LOCK (connection);
475 if (connection->worker != NULL)
477 _g_dbus_worker_stop (connection->worker);
478 connection->worker = NULL;
479 if (alive_connections != NULL)
480 g_warn_if_fail (g_hash_table_remove (alive_connections, connection));
484 if (alive_connections != NULL)
485 g_warn_if_fail (g_hash_table_lookup (alive_connections, connection) == NULL);
487 CONNECTION_UNLOCK (connection);
488 G_UNLOCK (message_bus_lock);
490 if (G_OBJECT_CLASS (g_dbus_connection_parent_class)->dispose != NULL)
491 G_OBJECT_CLASS (g_dbus_connection_parent_class)->dispose (object);
495 g_dbus_connection_finalize (GObject *object)
497 GDBusConnection *connection = G_DBUS_CONNECTION (object);
499 connection->finalizing = TRUE;
501 purge_all_signal_subscriptions (connection);
503 purge_all_filters (connection);
504 g_ptr_array_unref (connection->filters);
506 if (connection->authentication_observer != NULL)
507 g_object_unref (connection->authentication_observer);
509 if (connection->auth != NULL)
510 g_object_unref (connection->auth);
512 if (connection->credentials)
513 g_object_unref (connection->credentials);
515 if (connection->stream != NULL)
517 /* We don't really care if closing the stream succeeds or not */
518 g_io_stream_close_async (connection->stream,
520 NULL, /* GCancellable */
521 NULL, /* GAsyncReadyCallback */
522 NULL); /* userdata */
523 g_object_unref (connection->stream);
524 connection->stream = NULL;
527 g_free (connection->address);
529 g_free (connection->guid);
530 g_free (connection->bus_unique_name);
532 if (connection->initialization_error != NULL)
533 g_error_free (connection->initialization_error);
535 g_hash_table_unref (connection->map_method_serial_to_send_message_data);
537 g_hash_table_unref (connection->map_rule_to_signal_data);
538 g_hash_table_unref (connection->map_id_to_signal_data);
539 g_hash_table_unref (connection->map_sender_unique_name_to_signal_data_array);
541 g_hash_table_unref (connection->map_id_to_ei);
542 g_hash_table_unref (connection->map_object_path_to_eo);
543 g_hash_table_unref (connection->map_id_to_es);
544 g_hash_table_unref (connection->map_object_path_to_es);
546 if (connection->main_context_at_construction != NULL)
547 g_main_context_unref (connection->main_context_at_construction);
549 g_free (connection->machine_id);
551 g_mutex_free (connection->init_lock);
552 g_mutex_free (connection->lock);
554 G_OBJECT_CLASS (g_dbus_connection_parent_class)->finalize (object);
558 g_dbus_connection_get_property (GObject *object,
563 GDBusConnection *connection = G_DBUS_CONNECTION (object);
568 g_value_set_object (value, g_dbus_connection_get_stream (connection));
572 g_value_set_string (value, g_dbus_connection_get_guid (connection));
575 case PROP_UNIQUE_NAME:
576 g_value_set_string (value, g_dbus_connection_get_unique_name (connection));
580 g_value_set_boolean (value, g_dbus_connection_is_closed (connection));
583 case PROP_EXIT_ON_CLOSE:
584 g_value_set_boolean (value, g_dbus_connection_get_exit_on_close (connection));
587 case PROP_CAPABILITY_FLAGS:
588 g_value_set_flags (value, g_dbus_connection_get_capabilities (connection));
592 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
598 g_dbus_connection_set_property (GObject *object,
603 GDBusConnection *connection = G_DBUS_CONNECTION (object);
608 connection->stream = g_value_dup_object (value);
612 connection->guid = g_value_dup_string (value);
616 connection->address = g_value_dup_string (value);
620 connection->flags = g_value_get_flags (value);
623 case PROP_EXIT_ON_CLOSE:
624 g_dbus_connection_set_exit_on_close (connection, g_value_get_boolean (value));
627 case PROP_AUTHENTICATION_OBSERVER:
628 connection->authentication_observer = g_value_dup_object (value);
632 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
638 g_dbus_connection_real_closed (GDBusConnection *connection,
639 gboolean remote_peer_vanished,
642 if (remote_peer_vanished && connection->exit_on_close)
646 g_print ("%s: Remote peer vanished with error: %s (%s, %d). Exiting.\n",
649 g_quark_to_string (error->domain), error->code);
653 g_print ("%s: Remote peer vanished. Exiting.\n", G_STRFUNC);
660 g_dbus_connection_class_init (GDBusConnectionClass *klass)
662 GObjectClass *gobject_class;
664 gobject_class = G_OBJECT_CLASS (klass);
666 gobject_class->finalize = g_dbus_connection_finalize;
667 gobject_class->dispose = g_dbus_connection_dispose;
668 gobject_class->set_property = g_dbus_connection_set_property;
669 gobject_class->get_property = g_dbus_connection_get_property;
671 klass->closed = g_dbus_connection_real_closed;
674 * GDBusConnection:stream:
676 * The underlying #GIOStream used for I/O.
678 * If this is passed on construction and is a #GSocketConnection,
679 * then the corresponding #GSocket will be put into non-blocking mode.
683 g_object_class_install_property (gobject_class,
685 g_param_spec_object ("stream",
687 P_("The underlying streams used for I/O"),
691 G_PARAM_CONSTRUCT_ONLY |
692 G_PARAM_STATIC_NAME |
693 G_PARAM_STATIC_BLURB |
694 G_PARAM_STATIC_NICK));
697 * GDBusConnection:address:
699 * A D-Bus address specifying potential endpoints that can be used
700 * when establishing the connection.
704 g_object_class_install_property (gobject_class,
706 g_param_spec_string ("address",
708 P_("D-Bus address specifying potential socket endpoints"),
711 G_PARAM_CONSTRUCT_ONLY |
712 G_PARAM_STATIC_NAME |
713 G_PARAM_STATIC_BLURB |
714 G_PARAM_STATIC_NICK));
717 * GDBusConnection:flags:
719 * Flags from the #GDBusConnectionFlags enumeration.
723 g_object_class_install_property (gobject_class,
725 g_param_spec_flags ("flags",
728 G_TYPE_DBUS_CONNECTION_FLAGS,
729 G_DBUS_CONNECTION_FLAGS_NONE,
731 G_PARAM_CONSTRUCT_ONLY |
732 G_PARAM_STATIC_NAME |
733 G_PARAM_STATIC_BLURB |
734 G_PARAM_STATIC_NICK));
737 * GDBusConnection:guid:
739 * The GUID of the peer performing the role of server when
742 * If you are constructing a #GDBusConnection and pass
743 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER in the
744 * #GDBusConnection:flags property then you MUST also set this
745 * property to a valid guid.
747 * If you are constructing a #GDBusConnection and pass
748 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT in the
749 * #GDBusConnection:flags property you will be able to read the GUID
750 * of the other peer here after the connection has been successfully
755 g_object_class_install_property (gobject_class,
757 g_param_spec_string ("guid",
759 P_("GUID of the server peer"),
763 G_PARAM_CONSTRUCT_ONLY |
764 G_PARAM_STATIC_NAME |
765 G_PARAM_STATIC_BLURB |
766 G_PARAM_STATIC_NICK));
769 * GDBusConnection:unique-name:
771 * The unique name as assigned by the message bus or %NULL if the
772 * connection is not open or not a message bus connection.
776 g_object_class_install_property (gobject_class,
778 g_param_spec_string ("unique-name",
780 P_("Unique name of bus connection"),
783 G_PARAM_STATIC_NAME |
784 G_PARAM_STATIC_BLURB |
785 G_PARAM_STATIC_NICK));
788 * GDBusConnection:closed:
790 * A boolean specifying whether the connection has been closed.
794 g_object_class_install_property (gobject_class,
796 g_param_spec_boolean ("closed",
798 P_("Whether the connection is closed"),
801 G_PARAM_STATIC_NAME |
802 G_PARAM_STATIC_BLURB |
803 G_PARAM_STATIC_NICK));
806 * GDBusConnection:exit-on-close:
808 * A boolean specifying whether the process will be terminated (by
809 * calling <literal>raise(SIGTERM)</literal>) if the connection
810 * is closed by the remote peer.
814 g_object_class_install_property (gobject_class,
816 g_param_spec_boolean ("exit-on-close",
818 P_("Whether the process is terminated when the connection is closed"),
822 G_PARAM_STATIC_NAME |
823 G_PARAM_STATIC_BLURB |
824 G_PARAM_STATIC_NICK));
827 * GDBusConnection:capabilities:
829 * Flags from the #GDBusCapabilityFlags enumeration
830 * representing connection features negotiated with the other peer.
834 g_object_class_install_property (gobject_class,
835 PROP_CAPABILITY_FLAGS,
836 g_param_spec_flags ("capabilities",
839 G_TYPE_DBUS_CAPABILITY_FLAGS,
840 G_DBUS_CAPABILITY_FLAGS_NONE,
842 G_PARAM_STATIC_NAME |
843 G_PARAM_STATIC_BLURB |
844 G_PARAM_STATIC_NICK));
847 * GDBusConnection:authentication-observer:
849 * A #GDBusAuthObserver object to assist in the authentication process or %NULL.
853 g_object_class_install_property (gobject_class,
854 PROP_AUTHENTICATION_OBSERVER,
855 g_param_spec_object ("authentication-observer",
856 P_("Authentication Observer"),
857 P_("Object used to assist in the authentication process"),
858 G_TYPE_DBUS_AUTH_OBSERVER,
860 G_PARAM_CONSTRUCT_ONLY |
861 G_PARAM_STATIC_NAME |
862 G_PARAM_STATIC_BLURB |
863 G_PARAM_STATIC_NICK));
866 * GDBusConnection::closed:
867 * @connection: The #GDBusConnection emitting the signal.
868 * @remote_peer_vanished: %TRUE if @connection is closed because the
869 * remote peer closed its end of the connection.
870 * @error: A #GError with more details about the event or %NULL.
872 * Emitted when the connection is closed.
874 * The cause of this event can be
877 * If g_dbus_connection_close() is called. In this case
878 * @remote_peer_vanished is set to %FALSE and @error is %NULL.
881 * If the remote peer closes the connection. In this case
882 * @remote_peer_vanished is set to %TRUE and @error is set.
885 * If the remote peer sends invalid or malformed data. In this
886 * case @remote_peer_vanished is set to %FALSE and @error
891 * Upon receiving this signal, you should give up your reference to
892 * @connection. You are guaranteed that this signal is emitted only
897 signals[CLOSED_SIGNAL] = g_signal_new ("closed",
898 G_TYPE_DBUS_CONNECTION,
900 G_STRUCT_OFFSET (GDBusConnectionClass, closed),
903 _gio_marshal_VOID__BOOLEAN_BOXED,
911 g_dbus_connection_init (GDBusConnection *connection)
913 connection->lock = g_mutex_new ();
914 connection->init_lock = g_mutex_new ();
916 connection->map_method_serial_to_send_message_data = g_hash_table_new (g_direct_hash, g_direct_equal);
918 connection->map_rule_to_signal_data = g_hash_table_new (g_str_hash,
920 connection->map_id_to_signal_data = g_hash_table_new (g_direct_hash,
922 connection->map_sender_unique_name_to_signal_data_array = g_hash_table_new_full (g_str_hash,
925 (GDestroyNotify) g_ptr_array_unref);
927 connection->map_object_path_to_eo = g_hash_table_new_full (g_str_hash,
930 (GDestroyNotify) exported_object_free);
932 connection->map_id_to_ei = g_hash_table_new (g_direct_hash,
935 connection->map_object_path_to_es = g_hash_table_new_full (g_str_hash,
938 (GDestroyNotify) exported_subtree_free);
940 connection->map_id_to_es = g_hash_table_new (g_direct_hash,
943 connection->main_context_at_construction = g_main_context_get_thread_default ();
944 if (connection->main_context_at_construction != NULL)
945 g_main_context_ref (connection->main_context_at_construction);
947 connection->filters = g_ptr_array_new ();
951 * g_dbus_connection_get_stream:
952 * @connection: a #GDBusConnection
954 * Gets the underlying stream used for IO.
956 * Returns: (transfer none): the stream used for IO
961 g_dbus_connection_get_stream (GDBusConnection *connection)
963 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
964 return connection->stream;
968 * g_dbus_connection_start_message_processing:
969 * @connection: A #GDBusConnection.
971 * If @connection was created with
972 * %G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING, this method
973 * starts processing messages. Does nothing on if @connection wasn't
974 * created with this flag or if the method has already been called.
979 g_dbus_connection_start_message_processing (GDBusConnection *connection)
981 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
982 _g_dbus_worker_unfreeze (connection->worker);
986 * g_dbus_connection_is_closed:
987 * @connection: A #GDBusConnection.
989 * Gets whether @connection is closed.
991 * Returns: %TRUE if the connection is closed, %FALSE otherwise.
996 g_dbus_connection_is_closed (GDBusConnection *connection)
998 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
999 return connection->closed;
1003 * g_dbus_connection_get_capabilities:
1004 * @connection: A #GDBusConnection.
1006 * Gets the capabilities negotiated with the remote peer
1008 * Returns: Zero or more flags from the #GDBusCapabilityFlags enumeration.
1012 GDBusCapabilityFlags
1013 g_dbus_connection_get_capabilities (GDBusConnection *connection)
1015 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), G_DBUS_CAPABILITY_FLAGS_NONE);
1016 return connection->capabilities;
1019 /* ---------------------------------------------------------------------------------------------------- */
1022 flush_in_thread_func (GSimpleAsyncResult *res,
1024 GCancellable *cancellable)
1029 if (!g_dbus_connection_flush_sync (G_DBUS_CONNECTION (object),
1032 g_simple_async_result_take_error (res, error);
1036 * g_dbus_connection_flush:
1037 * @connection: A #GDBusConnection.
1038 * @cancellable: A #GCancellable or %NULL.
1039 * @callback: (allow-none): A #GAsyncReadyCallback to call when the request is
1040 * satisfied or %NULL if you don't care about the result.
1041 * @user_data: The data to pass to @callback.
1043 * Asynchronously flushes @connection, that is, writes all queued
1044 * outgoing message to the transport and then flushes the transport
1045 * (using g_output_stream_flush_async()). This is useful in programs
1046 * that wants to emit a D-Bus signal and then exit
1047 * immediately. Without flushing the connection, there is no guarantee
1048 * that the message has been sent to the networking buffers in the OS
1051 * This is an asynchronous method. When the operation is finished,
1052 * @callback will be invoked in the <link
1053 * linkend="g-main-context-push-thread-default">thread-default main
1054 * loop</link> of the thread you are calling this method from. You can
1055 * then call g_dbus_connection_flush_finish() to get the result of the
1056 * operation. See g_dbus_connection_flush_sync() for the synchronous
1062 g_dbus_connection_flush (GDBusConnection *connection,
1063 GCancellable *cancellable,
1064 GAsyncReadyCallback callback,
1067 GSimpleAsyncResult *simple;
1069 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
1071 simple = g_simple_async_result_new (G_OBJECT (connection),
1074 g_dbus_connection_flush);
1075 g_simple_async_result_run_in_thread (simple,
1076 flush_in_thread_func,
1079 g_object_unref (simple);
1083 * g_dbus_connection_flush_finish:
1084 * @connection: A #GDBusConnection.
1085 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_flush().
1086 * @error: Return location for error or %NULL.
1088 * Finishes an operation started with g_dbus_connection_flush().
1090 * Returns: %TRUE if the operation succeeded, %FALSE if @error is set.
1095 g_dbus_connection_flush_finish (GDBusConnection *connection,
1099 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
1104 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
1105 g_return_val_if_fail (G_IS_ASYNC_RESULT (res), FALSE);
1106 g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
1108 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_dbus_connection_flush);
1110 if (g_simple_async_result_propagate_error (simple, error))
1120 * g_dbus_connection_flush_sync:
1121 * @connection: A #GDBusConnection.
1122 * @cancellable: A #GCancellable or %NULL.
1123 * @error: Return location for error or %NULL.
1125 * Synchronously flushes @connection. The calling thread is blocked
1126 * until this is done. See g_dbus_connection_flush() for the
1127 * asynchronous version of this method and more details about what it
1130 * Returns: %TRUE if the operation succeeded, %FALSE if @error is set.
1135 g_dbus_connection_flush_sync (GDBusConnection *connection,
1136 GCancellable *cancellable,
1141 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
1142 g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
1146 if (connection->closed)
1148 g_set_error_literal (error,
1151 _("The connection is closed"));
1155 ret = _g_dbus_worker_flush_sync (connection->worker,
1163 /* ---------------------------------------------------------------------------------------------------- */
1167 GDBusConnection *connection;
1169 gboolean remote_peer_vanished;
1173 emit_closed_data_free (EmitClosedData *data)
1175 g_object_unref (data->connection);
1176 if (data->error != NULL)
1177 g_error_free (data->error);
1182 emit_closed_in_idle (gpointer user_data)
1184 EmitClosedData *data = user_data;
1187 g_object_notify (G_OBJECT (data->connection), "closed");
1188 g_signal_emit (data->connection,
1189 signals[CLOSED_SIGNAL],
1191 data->remote_peer_vanished,
1197 /* Can be called from any thread, must hold lock */
1199 set_closed_unlocked (GDBusConnection *connection,
1200 gboolean remote_peer_vanished,
1203 GSource *idle_source;
1204 EmitClosedData *data;
1206 CONNECTION_ENSURE_LOCK (connection);
1208 g_assert (!connection->closed);
1210 connection->closed = TRUE;
1212 data = g_new0 (EmitClosedData, 1);
1213 data->connection = g_object_ref (connection);
1214 data->remote_peer_vanished = remote_peer_vanished;
1215 data->error = error != NULL ? g_error_copy (error) : NULL;
1217 idle_source = g_idle_source_new ();
1218 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
1219 g_source_set_callback (idle_source,
1220 emit_closed_in_idle,
1222 (GDestroyNotify) emit_closed_data_free);
1223 g_source_attach (idle_source, connection->main_context_at_construction);
1224 g_source_unref (idle_source);
1227 /* ---------------------------------------------------------------------------------------------------- */
1230 close_in_thread_func (GSimpleAsyncResult *res,
1232 GCancellable *cancellable)
1237 if (!g_dbus_connection_close_sync (G_DBUS_CONNECTION (object),
1240 g_simple_async_result_take_error (res, error);
1244 * g_dbus_connection_close:
1245 * @connection: A #GDBusConnection.
1246 * @cancellable: A #GCancellable or %NULL.
1247 * @callback: (allow-none): A #GAsyncReadyCallback to call when the request is
1248 * satisfied or %NULL if you don't care about the result.
1249 * @user_data: The data to pass to @callback.
1251 * Closes @connection. Note that this never causes the process to
1252 * exit (this might only happen if the other end of a shared message
1253 * bus connection disconnects, see #GDBusConnection:exit-on-close).
1255 * Once the connection is closed, operations such as sending a message
1256 * will return with the error %G_IO_ERROR_CLOSED. Closing a connection
1257 * will not automatically flush the connection so queued messages may
1258 * be lost. Use g_dbus_connection_flush() if you need such guarantees.
1260 * If @connection is already closed, this method fails with
1261 * %G_IO_ERROR_CLOSED.
1263 * When @connection has been closed, the #GDBusConnection::closed
1264 * signal is emitted in the <link
1265 * linkend="g-main-context-push-thread-default">thread-default main
1266 * loop</link> of the thread that @connection was constructed in.
1268 * This is an asynchronous method. When the operation is finished,
1269 * @callback will be invoked in the <link
1270 * linkend="g-main-context-push-thread-default">thread-default main
1271 * loop</link> of the thread you are calling this method from. You can
1272 * then call g_dbus_connection_close_finish() to get the result of the
1273 * operation. See g_dbus_connection_close_sync() for the synchronous
1279 g_dbus_connection_close (GDBusConnection *connection,
1280 GCancellable *cancellable,
1281 GAsyncReadyCallback callback,
1284 GSimpleAsyncResult *simple;
1286 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
1288 simple = g_simple_async_result_new (G_OBJECT (connection),
1291 g_dbus_connection_close);
1292 g_simple_async_result_run_in_thread (simple,
1293 close_in_thread_func,
1296 g_object_unref (simple);
1300 * g_dbus_connection_close_finish:
1301 * @connection: A #GDBusConnection.
1302 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_close().
1303 * @error: Return location for error or %NULL.
1305 * Finishes an operation started with g_dbus_connection_close().
1307 * Returns: %TRUE if the operation succeeded, %FALSE if @error is set.
1312 g_dbus_connection_close_finish (GDBusConnection *connection,
1316 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
1321 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
1322 g_return_val_if_fail (G_IS_ASYNC_RESULT (res), FALSE);
1323 g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
1325 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_dbus_connection_close);
1327 if (g_simple_async_result_propagate_error (simple, error))
1337 * g_dbus_connection_close_sync:
1338 * @connection: A #GDBusConnection.
1339 * @cancellable: A #GCancellable or %NULL.
1340 * @error: Return location for error or %NULL.
1342 * Synchronously closees @connection. The calling thread is blocked
1343 * until this is done. See g_dbus_connection_close() for the
1344 * asynchronous version of this method and more details about what it
1347 * Returns: %TRUE if the operation succeeded, %FALSE if @error is set.
1352 g_dbus_connection_close_sync (GDBusConnection *connection,
1353 GCancellable *cancellable,
1358 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
1359 g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
1363 CONNECTION_LOCK (connection);
1364 if (!connection->closed)
1366 ret = g_io_stream_close (connection->stream,
1370 set_closed_unlocked (connection, FALSE, NULL);
1374 g_set_error_literal (error,
1377 _("The connection is closed"));
1379 CONNECTION_UNLOCK (connection);
1384 /* ---------------------------------------------------------------------------------------------------- */
1387 g_dbus_connection_send_message_unlocked (GDBusConnection *connection,
1388 GDBusMessage *message,
1389 GDBusSendMessageFlags flags,
1390 volatile guint32 *out_serial,
1395 guint32 serial_to_use;
1398 CONNECTION_ENSURE_LOCK (connection);
1400 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
1401 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), FALSE);
1403 /* TODO: check all necessary headers are present */
1408 if (out_serial != NULL)
1411 if (connection->closed)
1413 g_set_error_literal (error,
1416 _("The connection is closed"));
1420 blob = g_dbus_message_to_blob (message,
1422 connection->capabilities,
1427 if (flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL)
1428 serial_to_use = g_dbus_message_get_serial (message);
1430 serial_to_use = ++connection->last_serial; /* TODO: handle overflow */
1435 ((guint32 *) blob)[2] = GUINT32_TO_LE (serial_to_use);
1438 ((guint32 *) blob)[2] = GUINT32_TO_BE (serial_to_use);
1441 g_assert_not_reached ();
1446 g_printerr ("Writing message of %" G_GSIZE_FORMAT " bytes (serial %d) on %p:\n",
1447 blob_size, serial_to_use, connection);
1448 g_printerr ("----\n");
1449 hexdump (blob, blob_size);
1450 g_printerr ("----\n");
1453 /* TODO: use connection->auth to encode the blob */
1455 if (out_serial != NULL)
1456 *out_serial = serial_to_use;
1458 if (!(flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL))
1459 g_dbus_message_set_serial (message, serial_to_use);
1461 g_dbus_message_lock (message);
1462 _g_dbus_worker_send_message (connection->worker,
1466 blob = NULL; /* since _g_dbus_worker_send_message() steals the blob */
1477 * g_dbus_connection_send_message:
1478 * @connection: A #GDBusConnection.
1479 * @message: A #GDBusMessage
1480 * @flags: Flags affecting how the message is sent.
1481 * @out_serial: (out) (allow-none): Return location for serial number assigned
1482 * to @message when sending it or %NULL.
1483 * @error: Return location for error or %NULL.
1485 * Asynchronously sends @message to the peer represented by @connection.
1487 * Unless @flags contain the
1488 * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag, the serial number
1489 * will be assigned by @connection and set on @message via
1490 * g_dbus_message_set_serial(). If @out_serial is not %NULL, then the
1491 * serial number used will be written to this location prior to
1492 * submitting the message to the underlying transport.
1494 * If @connection is closed then the operation will fail with
1495 * %G_IO_ERROR_CLOSED. If @message is not well-formed,
1496 * the operation fails with %G_IO_ERROR_INVALID_ARGUMENT.
1498 * See <xref linkend="gdbus-server"/> and <xref
1499 * linkend="gdbus-unix-fd-client"/> for an example of how to use this
1500 * low-level API to send and receive UNIX file descriptors.
1502 * Note that @message must be unlocked, unless @flags contain the
1503 * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag.
1505 * Returns: %TRUE if the message was well-formed and queued for
1506 * transmission, %FALSE if @error is set.
1511 g_dbus_connection_send_message (GDBusConnection *connection,
1512 GDBusMessage *message,
1513 GDBusSendMessageFlags flags,
1514 volatile guint32 *out_serial,
1519 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
1520 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), FALSE);
1521 g_return_val_if_fail ((flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL) || !g_dbus_message_get_locked (message), FALSE);
1522 g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
1524 CONNECTION_LOCK (connection);
1525 ret = g_dbus_connection_send_message_unlocked (connection, message, flags, out_serial, error);
1526 CONNECTION_UNLOCK (connection);
1530 /* ---------------------------------------------------------------------------------------------------- */
1534 volatile gint ref_count;
1535 GDBusConnection *connection;
1537 GSimpleAsyncResult *simple;
1539 GMainContext *main_context;
1541 GCancellable *cancellable;
1543 gulong cancellable_handler_id;
1545 GSource *timeout_source;
1550 static SendMessageData *
1551 send_message_data_ref (SendMessageData *data)
1553 g_atomic_int_inc (&data->ref_count);
1558 send_message_data_unref (SendMessageData *data)
1560 if (g_atomic_int_dec_and_test (&data->ref_count))
1562 g_assert (data->timeout_source == NULL);
1563 g_assert (data->simple == NULL);
1564 g_assert (data->cancellable_handler_id == 0);
1565 g_object_unref (data->connection);
1566 if (data->cancellable != NULL)
1567 g_object_unref (data->cancellable);
1568 if (data->main_context != NULL)
1569 g_main_context_unref (data->main_context);
1574 /* ---------------------------------------------------------------------------------------------------- */
1576 /* can be called from any thread with lock held - caller must have prepared GSimpleAsyncResult already */
1578 send_message_with_reply_deliver (SendMessageData *data)
1580 CONNECTION_ENSURE_LOCK (data->connection);
1582 g_assert (!data->delivered);
1584 data->delivered = TRUE;
1586 g_simple_async_result_complete_in_idle (data->simple);
1587 g_object_unref (data->simple);
1588 data->simple = NULL;
1590 if (data->timeout_source != NULL)
1592 g_source_destroy (data->timeout_source);
1593 data->timeout_source = NULL;
1595 if (data->cancellable_handler_id > 0)
1597 g_cancellable_disconnect (data->cancellable, data->cancellable_handler_id);
1598 data->cancellable_handler_id = 0;
1601 g_warn_if_fail (g_hash_table_remove (data->connection->map_method_serial_to_send_message_data,
1602 GUINT_TO_POINTER (data->serial)));
1604 send_message_data_unref (data);
1607 /* ---------------------------------------------------------------------------------------------------- */
1609 /* must hold lock */
1611 send_message_data_deliver_reply_unlocked (SendMessageData *data,
1612 GDBusMessage *reply)
1614 if (data->delivered)
1617 g_simple_async_result_set_op_res_gpointer (data->simple,
1618 g_object_ref (reply),
1621 send_message_with_reply_deliver (data);
1627 /* ---------------------------------------------------------------------------------------------------- */
1630 send_message_with_reply_cancelled_idle_cb (gpointer user_data)
1632 SendMessageData *data = user_data;
1634 CONNECTION_LOCK (data->connection);
1635 if (data->delivered)
1638 g_simple_async_result_set_error (data->simple,
1640 G_IO_ERROR_CANCELLED,
1641 _("Operation was cancelled"));
1643 send_message_with_reply_deliver (data);
1646 CONNECTION_UNLOCK (data->connection);
1650 /* Can be called from any thread with or without lock held */
1652 send_message_with_reply_cancelled_cb (GCancellable *cancellable,
1655 SendMessageData *data = user_data;
1656 GSource *idle_source;
1658 /* postpone cancellation to idle handler since we may be called directly
1659 * via g_cancellable_connect() (e.g. holding lock)
1661 idle_source = g_idle_source_new ();
1662 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
1663 g_source_set_callback (idle_source,
1664 send_message_with_reply_cancelled_idle_cb,
1665 send_message_data_ref (data),
1666 (GDestroyNotify) send_message_data_unref);
1667 g_source_attach (idle_source, data->main_context);
1668 g_source_unref (idle_source);
1671 /* ---------------------------------------------------------------------------------------------------- */
1674 send_message_with_reply_timeout_cb (gpointer user_data)
1676 SendMessageData *data = user_data;
1678 CONNECTION_LOCK (data->connection);
1679 if (data->delivered)
1682 g_simple_async_result_set_error (data->simple,
1684 G_IO_ERROR_TIMED_OUT,
1685 _("Timeout was reached"));
1687 send_message_with_reply_deliver (data);
1690 CONNECTION_UNLOCK (data->connection);
1695 /* ---------------------------------------------------------------------------------------------------- */
1698 g_dbus_connection_send_message_with_reply_unlocked (GDBusConnection *connection,
1699 GDBusMessage *message,
1700 GDBusSendMessageFlags flags,
1702 volatile guint32 *out_serial,
1703 GCancellable *cancellable,
1704 GAsyncReadyCallback callback,
1707 GSimpleAsyncResult *simple;
1708 SendMessageData *data;
1710 volatile guint32 serial;
1714 if (out_serial == NULL)
1715 out_serial = &serial;
1717 if (timeout_msec == -1)
1718 timeout_msec = 25 * 1000;
1720 simple = g_simple_async_result_new (G_OBJECT (connection),
1723 g_dbus_connection_send_message_with_reply);
1725 if (g_cancellable_is_cancelled (cancellable))
1727 g_simple_async_result_set_error (simple,
1729 G_IO_ERROR_CANCELLED,
1730 _("Operation was cancelled"));
1731 g_simple_async_result_complete_in_idle (simple);
1732 g_object_unref (simple);
1736 if (connection->closed)
1738 g_simple_async_result_set_error (simple,
1741 _("The connection is closed"));
1742 g_simple_async_result_complete_in_idle (simple);
1743 g_object_unref (simple);
1748 if (!g_dbus_connection_send_message_unlocked (connection, message, flags, out_serial, &error))
1750 g_simple_async_result_take_error (simple, error);
1751 g_simple_async_result_complete_in_idle (simple);
1752 g_object_unref (simple);
1756 data = g_new0 (SendMessageData, 1);
1757 data->ref_count = 1;
1758 data->connection = g_object_ref (connection);
1759 data->simple = simple;
1760 data->serial = *out_serial;
1761 data->main_context = g_main_context_get_thread_default ();
1762 if (data->main_context != NULL)
1763 g_main_context_ref (data->main_context);
1765 if (cancellable != NULL)
1767 data->cancellable = g_object_ref (cancellable);
1768 data->cancellable_handler_id = g_cancellable_connect (cancellable,
1769 G_CALLBACK (send_message_with_reply_cancelled_cb),
1770 send_message_data_ref (data),
1771 (GDestroyNotify) send_message_data_unref);
1772 g_object_set_data_full (G_OBJECT (simple),
1774 g_object_ref (cancellable),
1775 (GDestroyNotify) g_object_unref);
1778 if (timeout_msec != G_MAXINT)
1780 data->timeout_source = g_timeout_source_new (timeout_msec);
1781 g_source_set_priority (data->timeout_source, G_PRIORITY_DEFAULT);
1782 g_source_set_callback (data->timeout_source,
1783 send_message_with_reply_timeout_cb,
1784 send_message_data_ref (data),
1785 (GDestroyNotify) send_message_data_unref);
1786 g_source_attach (data->timeout_source, data->main_context);
1787 g_source_unref (data->timeout_source);
1790 g_hash_table_insert (connection->map_method_serial_to_send_message_data,
1791 GUINT_TO_POINTER (*out_serial),
1799 * g_dbus_connection_send_message_with_reply:
1800 * @connection: A #GDBusConnection.
1801 * @message: A #GDBusMessage.
1802 * @flags: Flags affecting how the message is sent.
1803 * @timeout_msec: The timeout in milliseconds, -1 to use the default
1804 * timeout or %G_MAXINT for no timeout.
1805 * @out_serial: (out) (allow-none): Return location for serial number assigned
1806 * to @message when sending it or %NULL.
1807 * @cancellable: A #GCancellable or %NULL.
1808 * @callback: (allow-none): A #GAsyncReadyCallback to call when the request is
1809 * satisfied or %NULL if you don't care about the result.
1810 * @user_data: The data to pass to @callback.
1812 * Asynchronously sends @message to the peer represented by @connection.
1814 * Unless @flags contain the
1815 * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag, the serial number
1816 * will be assigned by @connection and set on @message via
1817 * g_dbus_message_set_serial(). If @out_serial is not %NULL, then the
1818 * serial number used will be written to this location prior to
1819 * submitting the message to the underlying transport.
1821 * If @connection is closed then the operation will fail with
1822 * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the operation will
1823 * fail with %G_IO_ERROR_CANCELLED. If @message is not well-formed,
1824 * the operation fails with %G_IO_ERROR_INVALID_ARGUMENT.
1826 * This is an asynchronous method. When the operation is finished, @callback will be invoked
1827 * in the <link linkend="g-main-context-push-thread-default">thread-default main loop</link>
1828 * of the thread you are calling this method from. You can then call
1829 * g_dbus_connection_send_message_with_reply_finish() to get the result of the operation.
1830 * See g_dbus_connection_send_message_with_reply_sync() for the synchronous version.
1832 * Note that @message must be unlocked, unless @flags contain the
1833 * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag.
1835 * See <xref linkend="gdbus-server"/> and <xref
1836 * linkend="gdbus-unix-fd-client"/> for an example of how to use this
1837 * low-level API to send and receive UNIX file descriptors.
1842 g_dbus_connection_send_message_with_reply (GDBusConnection *connection,
1843 GDBusMessage *message,
1844 GDBusSendMessageFlags flags,
1846 volatile guint32 *out_serial,
1847 GCancellable *cancellable,
1848 GAsyncReadyCallback callback,
1851 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
1852 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
1853 g_return_if_fail ((flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL) || !g_dbus_message_get_locked (message));
1854 g_return_if_fail (timeout_msec >= 0 || timeout_msec == -1);
1856 CONNECTION_LOCK (connection);
1857 g_dbus_connection_send_message_with_reply_unlocked (connection,
1865 CONNECTION_UNLOCK (connection);
1869 * g_dbus_connection_send_message_with_reply_finish:
1870 * @connection: a #GDBusConnection
1871 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_send_message_with_reply().
1872 * @error: Return location for error or %NULL.
1874 * Finishes an operation started with g_dbus_connection_send_message_with_reply().
1876 * Note that @error is only set if a local in-process error
1877 * occured. That is to say that the returned #GDBusMessage object may
1878 * be of type %G_DBUS_MESSAGE_TYPE_ERROR. Use
1879 * g_dbus_message_to_gerror() to transcode this to a #GError.
1881 * See <xref linkend="gdbus-server"/> and <xref
1882 * linkend="gdbus-unix-fd-client"/> for an example of how to use this
1883 * low-level API to send and receive UNIX file descriptors.
1885 * Returns: (transfer full): A locked #GDBusMessage or %NULL if @error is set.
1890 g_dbus_connection_send_message_with_reply_finish (GDBusConnection *connection,
1894 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
1895 GDBusMessage *reply;
1896 GCancellable *cancellable;
1898 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
1899 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
1903 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_dbus_connection_send_message_with_reply);
1905 if (g_simple_async_result_propagate_error (simple, error))
1908 reply = g_object_ref (g_simple_async_result_get_op_res_gpointer (simple));
1909 cancellable = g_object_get_data (G_OBJECT (simple), "cancellable");
1910 if (cancellable != NULL && g_cancellable_is_cancelled (cancellable))
1912 g_object_unref (reply);
1914 g_set_error_literal (error,
1916 G_IO_ERROR_CANCELLED,
1917 _("Operation was cancelled"));
1923 /* ---------------------------------------------------------------------------------------------------- */
1928 GMainContext *context;
1930 } SendMessageSyncData;
1933 send_message_with_reply_sync_cb (GDBusConnection *connection,
1937 SendMessageSyncData *data = user_data;
1938 data->res = g_object_ref (res);
1939 g_main_loop_quit (data->loop);
1943 * g_dbus_connection_send_message_with_reply_sync:
1944 * @connection: A #GDBusConnection.
1945 * @message: A #GDBusMessage.
1946 * @flags: Flags affecting how the message is sent.
1947 * @timeout_msec: The timeout in milliseconds, -1 to use the default
1948 * timeout or %G_MAXINT for no timeout.
1949 * @out_serial: (out) (allow-none): Return location for serial number assigned
1950 * to @message when sending it or %NULL.
1951 * @cancellable: A #GCancellable or %NULL.
1952 * @error: Return location for error or %NULL.
1954 * Synchronously sends @message to the peer represented by @connection
1955 * and blocks the calling thread until a reply is received or the
1956 * timeout is reached. See g_dbus_connection_send_message_with_reply()
1957 * for the asynchronous version of this method.
1959 * Unless @flags contain the
1960 * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag, the serial number
1961 * will be assigned by @connection and set on @message via
1962 * g_dbus_message_set_serial(). If @out_serial is not %NULL, then the
1963 * serial number used will be written to this location prior to
1964 * submitting the message to the underlying transport.
1966 * If @connection is closed then the operation will fail with
1967 * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the operation will
1968 * fail with %G_IO_ERROR_CANCELLED. If @message is not well-formed,
1969 * the operation fails with %G_IO_ERROR_INVALID_ARGUMENT.
1971 * Note that @error is only set if a local in-process error
1972 * occured. That is to say that the returned #GDBusMessage object may
1973 * be of type %G_DBUS_MESSAGE_TYPE_ERROR. Use
1974 * g_dbus_message_to_gerror() to transcode this to a #GError.
1976 * See <xref linkend="gdbus-server"/> and <xref
1977 * linkend="gdbus-unix-fd-client"/> for an example of how to use this
1978 * low-level API to send and receive UNIX file descriptors.
1980 * Note that @message must be unlocked, unless @flags contain the
1981 * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag.
1983 * Returns: (transfer full): A locked #GDBusMessage that is the reply to @message or %NULL if @error is set.
1988 g_dbus_connection_send_message_with_reply_sync (GDBusConnection *connection,
1989 GDBusMessage *message,
1990 GDBusSendMessageFlags flags,
1992 volatile guint32 *out_serial,
1993 GCancellable *cancellable,
1996 SendMessageSyncData *data;
1997 GDBusMessage *reply;
1999 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
2000 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2001 g_return_val_if_fail ((flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL) || !g_dbus_message_get_locked (message), NULL);
2002 g_return_val_if_fail (timeout_msec >= 0 || timeout_msec == -1, NULL);
2003 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
2005 data = g_new0 (SendMessageSyncData, 1);
2006 data->context = g_main_context_new ();
2007 data->loop = g_main_loop_new (data->context, FALSE);
2009 g_main_context_push_thread_default (data->context);
2011 g_dbus_connection_send_message_with_reply (connection,
2017 (GAsyncReadyCallback) send_message_with_reply_sync_cb,
2019 g_main_loop_run (data->loop);
2020 reply = g_dbus_connection_send_message_with_reply_finish (connection,
2024 g_main_context_pop_thread_default (data->context);
2026 g_main_context_unref (data->context);
2027 g_main_loop_unref (data->loop);
2028 g_object_unref (data->res);
2034 /* ---------------------------------------------------------------------------------------------------- */
2038 GDBusMessageFilterFunction func;
2045 GDBusMessageFilterFunction filter_function;
2047 GDestroyNotify user_data_free_func;
2050 /* Called in worker's thread - we must not block */
2052 on_worker_message_received (GDBusWorker *worker,
2053 GDBusMessage *message,
2056 GDBusConnection *connection;
2057 FilterCallback *filters;
2062 G_LOCK (message_bus_lock);
2063 alive = (g_hash_table_lookup (alive_connections, user_data) != NULL);
2066 G_UNLOCK (message_bus_lock);
2069 connection = G_DBUS_CONNECTION (user_data);
2070 g_object_ref (connection);
2071 G_UNLOCK (message_bus_lock);
2073 //g_debug ("in on_worker_message_received");
2075 g_object_ref (message);
2076 g_dbus_message_lock (message);
2078 //g_debug ("boo ref_count = %d %p %p", G_OBJECT (connection)->ref_count, connection, connection->worker);
2080 /* First collect the set of callback functions */
2081 CONNECTION_LOCK (connection);
2082 num_filters = connection->filters->len;
2083 filters = g_new0 (FilterCallback, num_filters);
2084 for (n = 0; n < num_filters; n++)
2086 FilterData *data = connection->filters->pdata[n];
2087 filters[n].func = data->filter_function;
2088 filters[n].user_data = data->user_data;
2090 CONNECTION_UNLOCK (connection);
2092 /* then call the filters in order (without holding the lock) */
2093 for (n = 0; n < num_filters; n++)
2095 message = filters[n].func (connection,
2098 filters[n].user_data);
2099 if (message == NULL)
2101 g_dbus_message_lock (message);
2104 /* Standard dispatch unless the filter ate the message - no need to
2105 * do anything if the message was altered
2107 if (message != NULL)
2109 GDBusMessageType message_type;
2111 message_type = g_dbus_message_get_message_type (message);
2112 if (message_type == G_DBUS_MESSAGE_TYPE_METHOD_RETURN || message_type == G_DBUS_MESSAGE_TYPE_ERROR)
2114 guint32 reply_serial;
2115 SendMessageData *send_message_data;
2117 reply_serial = g_dbus_message_get_reply_serial (message);
2118 CONNECTION_LOCK (connection);
2119 send_message_data = g_hash_table_lookup (connection->map_method_serial_to_send_message_data,
2120 GUINT_TO_POINTER (reply_serial));
2121 if (send_message_data != NULL)
2123 //g_debug ("delivering reply/error for serial %d for %p", reply_serial, connection);
2124 send_message_data_deliver_reply_unlocked (send_message_data, message);
2128 //g_debug ("message reply/error for serial %d but no SendMessageData found for %p", reply_serial, connection);
2130 CONNECTION_UNLOCK (connection);
2132 else if (message_type == G_DBUS_MESSAGE_TYPE_SIGNAL)
2134 CONNECTION_LOCK (connection);
2135 distribute_signals (connection, message);
2136 CONNECTION_UNLOCK (connection);
2138 else if (message_type == G_DBUS_MESSAGE_TYPE_METHOD_CALL)
2140 CONNECTION_LOCK (connection);
2141 distribute_method_call (connection, message);
2142 CONNECTION_UNLOCK (connection);
2146 if (message != NULL)
2147 g_object_unref (message);
2148 g_object_unref (connection);
2152 /* Called in worker's thread */
2153 static GDBusMessage *
2154 on_worker_message_about_to_be_sent (GDBusWorker *worker,
2155 GDBusMessage *message,
2158 GDBusConnection *connection;
2159 FilterCallback *filters;
2164 G_LOCK (message_bus_lock);
2165 alive = (g_hash_table_lookup (alive_connections, user_data) != NULL);
2168 G_UNLOCK (message_bus_lock);
2171 connection = G_DBUS_CONNECTION (user_data);
2172 g_object_ref (connection);
2173 G_UNLOCK (message_bus_lock);
2175 //g_debug ("in on_worker_message_about_to_be_sent");
2177 /* First collect the set of callback functions */
2178 CONNECTION_LOCK (connection);
2179 num_filters = connection->filters->len;
2180 filters = g_new0 (FilterCallback, num_filters);
2181 for (n = 0; n < num_filters; n++)
2183 FilterData *data = connection->filters->pdata[n];
2184 filters[n].func = data->filter_function;
2185 filters[n].user_data = data->user_data;
2187 CONNECTION_UNLOCK (connection);
2189 /* then call the filters in order (without holding the lock) */
2190 for (n = 0; n < num_filters; n++)
2192 g_dbus_message_lock (message);
2193 message = filters[n].func (connection,
2196 filters[n].user_data);
2197 if (message == NULL)
2201 g_object_unref (connection);
2207 /* Called in worker's thread - we must not block */
2209 on_worker_closed (GDBusWorker *worker,
2210 gboolean remote_peer_vanished,
2214 GDBusConnection *connection;
2217 G_LOCK (message_bus_lock);
2218 alive = (g_hash_table_lookup (alive_connections, user_data) != NULL);
2221 G_UNLOCK (message_bus_lock);
2224 connection = G_DBUS_CONNECTION (user_data);
2225 g_object_ref (connection);
2226 G_UNLOCK (message_bus_lock);
2228 //g_debug ("in on_worker_closed: %s", error->message);
2230 CONNECTION_LOCK (connection);
2231 if (!connection->closed)
2232 set_closed_unlocked (connection, remote_peer_vanished, error);
2233 CONNECTION_UNLOCK (connection);
2235 g_object_unref (connection);
2238 /* ---------------------------------------------------------------------------------------------------- */
2240 /* Determines the biggest set of capabilities we can support on this connection */
2241 static GDBusCapabilityFlags
2242 get_offered_capabilities_max (GDBusConnection *connection)
2244 GDBusCapabilityFlags ret;
2245 ret = G_DBUS_CAPABILITY_FLAGS_NONE;
2247 if (G_IS_UNIX_CONNECTION (connection->stream))
2248 ret |= G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING;
2254 initable_init (GInitable *initable,
2255 GCancellable *cancellable,
2258 GDBusConnection *connection = G_DBUS_CONNECTION (initable);
2261 /* This method needs to be idempotent to work with the singleton
2262 * pattern. See the docs for g_initable_init(). We implement this by
2265 * Unfortunately we can't use the main lock since the on_worker_*()
2266 * callbacks above needs the lock during initialization (for message
2267 * bus connections we do a synchronous Hello() call on the bus).
2269 g_mutex_lock (connection->init_lock);
2273 /* First, handle the case where the connection already has an
2274 * initialization error set.
2276 if (connection->initialization_error != NULL)
2279 /* Also make this a no-op if we're already initialized fine */
2280 if (connection->is_initialized)
2286 g_assert (connection->initialization_error == NULL && !connection->is_initialized);
2288 /* The user can pass multiple (but mutally exclusive) construct
2291 * - stream (of type GIOStream)
2292 * - address (of type gchar*)
2294 * At the end of the day we end up with a non-NULL GIOStream
2295 * object in connection->stream.
2297 if (connection->address != NULL)
2299 g_assert (connection->stream == NULL);
2301 if ((connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER) ||
2302 (connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS))
2304 g_set_error_literal (error,
2306 G_IO_ERROR_INVALID_ARGUMENT,
2307 _("Unsupported flags encountered when constructing a client-side connection"));
2311 connection->stream = g_dbus_address_get_stream_sync (connection->address,
2312 NULL, /* TODO: out_guid */
2314 &connection->initialization_error);
2315 if (connection->stream == NULL)
2318 else if (connection->stream != NULL)
2324 g_assert_not_reached ();
2327 /* Authenticate the connection */
2328 if (connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER)
2330 g_assert (!(connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT));
2331 g_assert (connection->guid != NULL);
2332 connection->auth = _g_dbus_auth_new (connection->stream);
2333 if (!_g_dbus_auth_run_server (connection->auth,
2334 connection->authentication_observer,
2336 (connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS),
2337 get_offered_capabilities_max (connection),
2338 &connection->capabilities,
2339 &connection->credentials,
2341 &connection->initialization_error))
2344 else if (connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT)
2346 g_assert (!(connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER));
2347 g_assert (connection->guid == NULL);
2348 connection->auth = _g_dbus_auth_new (connection->stream);
2349 connection->guid = _g_dbus_auth_run_client (connection->auth,
2350 get_offered_capabilities_max (connection),
2351 &connection->capabilities,
2353 &connection->initialization_error);
2354 if (connection->guid == NULL)
2358 if (connection->authentication_observer != NULL)
2360 g_object_unref (connection->authentication_observer);
2361 connection->authentication_observer = NULL;
2364 //g_output_stream_flush (G_SOCKET_CONNECTION (connection->stream)
2366 //g_debug ("haz unix fd passing powers: %d", connection->capabilities & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING);
2369 /* We want all IO operations to be non-blocking since they happen in
2370 * the worker thread which is shared by _all_ connections.
2372 if (G_IS_SOCKET_CONNECTION (connection->stream))
2374 g_socket_set_blocking (g_socket_connection_get_socket (G_SOCKET_CONNECTION (connection->stream)), FALSE);
2378 G_LOCK (message_bus_lock);
2379 if (alive_connections == NULL)
2380 alive_connections = g_hash_table_new (g_direct_hash, g_direct_equal);
2381 g_hash_table_insert (alive_connections, connection, connection);
2382 G_UNLOCK (message_bus_lock);
2384 connection->worker = _g_dbus_worker_new (connection->stream,
2385 connection->capabilities,
2386 (connection->flags & G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING),
2387 on_worker_message_received,
2388 on_worker_message_about_to_be_sent,
2392 /* if a bus connection, call org.freedesktop.DBus.Hello - this is how we're getting a name */
2393 if (connection->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION)
2395 GVariant *hello_result;
2397 /* we could lift this restriction by adding code in gdbusprivate.c */
2398 if (connection->flags & G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING)
2400 g_set_error_literal (&connection->initialization_error,
2403 "Cannot use DELAY_MESSAGE_PROCESSING with MESSAGE_BUS_CONNECTION");
2407 hello_result = g_dbus_connection_call_sync (connection,
2408 "org.freedesktop.DBus", /* name */
2409 "/org/freedesktop/DBus", /* path */
2410 "org.freedesktop.DBus", /* interface */
2412 NULL, /* parameters */
2413 G_VARIANT_TYPE ("(s)"),
2414 G_DBUS_CALL_FLAGS_NONE,
2416 NULL, /* TODO: cancellable */
2417 &connection->initialization_error);
2418 if (hello_result == NULL)
2421 g_variant_get (hello_result, "(s)", &connection->bus_unique_name);
2422 g_variant_unref (hello_result);
2423 //g_debug ("unique name is `%s'", connection->bus_unique_name);
2426 connection->is_initialized = TRUE;
2432 g_assert (connection->initialization_error != NULL);
2433 g_propagate_error (error, g_error_copy (connection->initialization_error));
2436 g_mutex_unlock (connection->init_lock);
2442 initable_iface_init (GInitableIface *initable_iface)
2444 initable_iface->init = initable_init;
2447 /* ---------------------------------------------------------------------------------------------------- */
2450 async_initable_iface_init (GAsyncInitableIface *async_initable_iface)
2455 /* ---------------------------------------------------------------------------------------------------- */
2458 * g_dbus_connection_new:
2459 * @stream: A #GIOStream.
2460 * @guid: (allow-none): The GUID to use if a authenticating as a server or %NULL.
2461 * @flags: Flags describing how to make the connection.
2462 * @observer: (allow-none): A #GDBusAuthObserver or %NULL.
2463 * @cancellable: A #GCancellable or %NULL.
2464 * @callback: A #GAsyncReadyCallback to call when the request is satisfied.
2465 * @user_data: The data to pass to @callback.
2467 * Asynchronously sets up a D-Bus connection for exchanging D-Bus messages
2468 * with the end represented by @stream.
2470 * If @stream is a #GSocketConnection, then the corresponding #GSocket
2471 * will be put into non-blocking mode.
2473 * If @observer is not %NULL it may be used to control the
2474 * authentication process.
2476 * When the operation is finished, @callback will be invoked. You can
2477 * then call g_dbus_connection_new_finish() to get the result of the
2480 * This is a asynchronous failable constructor. See
2481 * g_dbus_connection_new_sync() for the synchronous
2487 g_dbus_connection_new (GIOStream *stream,
2489 GDBusConnectionFlags flags,
2490 GDBusAuthObserver *observer,
2491 GCancellable *cancellable,
2492 GAsyncReadyCallback callback,
2495 g_return_if_fail (G_IS_IO_STREAM (stream));
2496 g_async_initable_new_async (G_TYPE_DBUS_CONNECTION,
2504 "authentication-observer", observer,
2509 * g_dbus_connection_new_finish:
2510 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_new().
2511 * @error: Return location for error or %NULL.
2513 * Finishes an operation started with g_dbus_connection_new().
2515 * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
2520 g_dbus_connection_new_finish (GAsyncResult *res,
2524 GObject *source_object;
2526 g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
2527 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
2529 source_object = g_async_result_get_source_object (res);
2530 g_assert (source_object != NULL);
2531 object = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object),
2534 g_object_unref (source_object);
2536 return G_DBUS_CONNECTION (object);
2542 * g_dbus_connection_new_sync:
2543 * @stream: A #GIOStream.
2544 * @guid: (allow-none): The GUID to use if a authenticating as a server or %NULL.
2545 * @flags: Flags describing how to make the connection.
2546 * @observer: (allow-none): A #GDBusAuthObserver or %NULL.
2547 * @cancellable: A #GCancellable or %NULL.
2548 * @error: Return location for error or %NULL.
2550 * Synchronously sets up a D-Bus connection for exchanging D-Bus messages
2551 * with the end represented by @stream.
2553 * If @stream is a #GSocketConnection, then the corresponding #GSocket
2554 * will be put into non-blocking mode.
2556 * If @observer is not %NULL it may be used to control the
2557 * authentication process.
2559 * This is a synchronous failable constructor. See
2560 * g_dbus_connection_new() for the asynchronous version.
2562 * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
2567 g_dbus_connection_new_sync (GIOStream *stream,
2569 GDBusConnectionFlags flags,
2570 GDBusAuthObserver *observer,
2571 GCancellable *cancellable,
2574 g_return_val_if_fail (G_IS_IO_STREAM (stream), NULL);
2575 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
2576 return g_initable_new (G_TYPE_DBUS_CONNECTION,
2582 "authentication-observer", observer,
2586 /* ---------------------------------------------------------------------------------------------------- */
2589 * g_dbus_connection_new_for_address:
2590 * @address: A D-Bus address.
2591 * @flags: Flags describing how to make the connection.
2592 * @observer: (allow-none): A #GDBusAuthObserver or %NULL.
2593 * @cancellable: A #GCancellable or %NULL.
2594 * @callback: A #GAsyncReadyCallback to call when the request is satisfied.
2595 * @user_data: The data to pass to @callback.
2597 * Asynchronously connects and sets up a D-Bus client connection for
2598 * exchanging D-Bus messages with an endpoint specified by @address
2599 * which must be in the D-Bus address format.
2601 * This constructor can only be used to initiate client-side
2602 * connections - use g_dbus_connection_new() if you need to act as the
2603 * server. In particular, @flags cannot contain the
2604 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER or
2605 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS flags.
2607 * When the operation is finished, @callback will be invoked. You can
2608 * then call g_dbus_connection_new_finish() to get the result of the
2611 * If @observer is not %NULL it may be used to control the
2612 * authentication process.
2614 * This is a asynchronous failable constructor. See
2615 * g_dbus_connection_new_for_address_sync() for the synchronous
2621 g_dbus_connection_new_for_address (const gchar *address,
2622 GDBusConnectionFlags flags,
2623 GDBusAuthObserver *observer,
2624 GCancellable *cancellable,
2625 GAsyncReadyCallback callback,
2628 g_return_if_fail (address != NULL);
2629 g_async_initable_new_async (G_TYPE_DBUS_CONNECTION,
2636 "authentication-observer", observer,
2641 * g_dbus_connection_new_for_address_finish:
2642 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_new().
2643 * @error: Return location for error or %NULL.
2645 * Finishes an operation started with g_dbus_connection_new_for_address().
2647 * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
2652 g_dbus_connection_new_for_address_finish (GAsyncResult *res,
2656 GObject *source_object;
2658 g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
2659 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
2661 source_object = g_async_result_get_source_object (res);
2662 g_assert (source_object != NULL);
2663 object = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object),
2666 g_object_unref (source_object);
2668 return G_DBUS_CONNECTION (object);
2674 * g_dbus_connection_new_for_address_sync:
2675 * @address: A D-Bus address.
2676 * @flags: Flags describing how to make the connection.
2677 * @observer: (allow-none): A #GDBusAuthObserver or %NULL.
2678 * @cancellable: A #GCancellable or %NULL.
2679 * @error: Return location for error or %NULL.
2681 * Synchronously connects and sets up a D-Bus client connection for
2682 * exchanging D-Bus messages with an endpoint specified by @address
2683 * which must be in the D-Bus address format.
2685 * This constructor can only be used to initiate client-side
2686 * connections - use g_dbus_connection_new_sync() if you need to act
2687 * as the server. In particular, @flags cannot contain the
2688 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER or
2689 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS flags.
2691 * This is a synchronous failable constructor. See
2692 * g_dbus_connection_new_for_address() for the asynchronous version.
2694 * If @observer is not %NULL it may be used to control the
2695 * authentication process.
2697 * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
2702 g_dbus_connection_new_for_address_sync (const gchar *address,
2703 GDBusConnectionFlags flags,
2704 GDBusAuthObserver *observer,
2705 GCancellable *cancellable,
2708 g_return_val_if_fail (address != NULL, NULL);
2709 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
2710 return g_initable_new (G_TYPE_DBUS_CONNECTION,
2715 "authentication-observer", observer,
2719 /* ---------------------------------------------------------------------------------------------------- */
2722 * g_dbus_connection_set_exit_on_close:
2723 * @connection: A #GDBusConnection.
2724 * @exit_on_close: Whether the process should be terminated
2725 * when @connection is closed by the remote peer.
2727 * Sets whether the process should be terminated when @connection is
2728 * closed by the remote peer. See #GDBusConnection:exit-on-close for
2731 * Note that this function should be used with care. Most modern UNIX
2732 * desktops tie the notion of a user session the session bus, and expect
2733 * all of a users applications to quit when their bus connection goes away.
2734 * If you are setting @exit_on_close to %FALSE for the shared session
2735 * bus connection, you should make sure that your application exits
2736 * when the user session ends.
2741 g_dbus_connection_set_exit_on_close (GDBusConnection *connection,
2742 gboolean exit_on_close)
2744 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
2745 connection->exit_on_close = exit_on_close;
2749 * g_dbus_connection_get_exit_on_close:
2750 * @connection: A #GDBusConnection.
2752 * Gets whether the process is terminated when @connection is
2753 * closed by the remote peer. See
2754 * #GDBusConnection:exit-on-close for more details.
2756 * Returns: Whether the process is terminated when @connection is
2757 * closed by the remote peer.
2762 g_dbus_connection_get_exit_on_close (GDBusConnection *connection)
2764 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
2765 return connection->exit_on_close;
2769 * g_dbus_connection_get_guid:
2770 * @connection: A #GDBusConnection.
2772 * The GUID of the peer performing the role of server when
2773 * authenticating. See #GDBusConnection:guid for more details.
2775 * Returns: The GUID. Do not free this string, it is owned by
2781 g_dbus_connection_get_guid (GDBusConnection *connection)
2783 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
2784 return connection->guid;
2788 * g_dbus_connection_get_unique_name:
2789 * @connection: A #GDBusConnection.
2791 * Gets the unique name of @connection as assigned by the message
2792 * bus. This can also be used to figure out if @connection is a
2793 * message bus connection.
2795 * Returns: The unique name or %NULL if @connection is not a message
2796 * bus connection. Do not free this string, it is owned by
2802 g_dbus_connection_get_unique_name (GDBusConnection *connection)
2804 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
2805 return connection->bus_unique_name;
2809 * g_dbus_connection_get_peer_credentials:
2810 * @connection: A #GDBusConnection.
2812 * Gets the credentials of the authenticated peer. This will always
2813 * return %NULL unless @connection acted as a server
2814 * (e.g. %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER was passed)
2815 * when set up and the client passed credentials as part of the
2816 * authentication process.
2818 * In a message bus setup, the message bus is always the server and
2819 * each application is a client. So this method will always return
2820 * %NULL for message bus clients.
2822 * Returns: (transfer none): A #GCredentials or %NULL if not available. Do not free
2823 * this object, it is owned by @connection.
2828 g_dbus_connection_get_peer_credentials (GDBusConnection *connection)
2830 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
2831 return connection->credentials;
2834 /* ---------------------------------------------------------------------------------------------------- */
2836 static guint _global_filter_id = 1;
2839 * g_dbus_connection_add_filter:
2840 * @connection: A #GDBusConnection.
2841 * @filter_function: A filter function.
2842 * @user_data: User data to pass to @filter_function.
2843 * @user_data_free_func: Function to free @user_data with when filter
2844 * is removed or %NULL.
2846 * Adds a message filter. Filters are handlers that are run on all
2847 * incoming and outgoing messages, prior to standard dispatch. Filters
2848 * are run in the order that they were added. The same handler can be
2849 * added as a filter more than once, in which case it will be run more
2850 * than once. Filters added during a filter callback won't be run on
2851 * the message being processed. Filter functions are allowed to modify
2852 * and even drop messages - see the #GDBusMessageFilterResult
2853 * enumeration for details.
2855 * Note that filters are run in a dedicated message handling thread so
2856 * they can't block and, generally, can't do anything but signal a
2857 * worker thread. Also note that filters are rarely needed - use API
2858 * such as g_dbus_connection_send_message_with_reply(),
2859 * g_dbus_connection_signal_subscribe() or
2860 * g_dbus_connection_call() instead.
2862 * If a filter consumes an incoming message the message is not
2863 * dispatched anywhere else - not even the standard dispatch machinery
2864 * (that API such as g_dbus_connection_signal_subscribe() and
2865 * g_dbus_connection_send_message_with_reply() relies on) will see the
2866 * message. Similary, if a filter consumes an outgoing message, the
2867 * message will not be sent to the other peer.
2869 * Returns: A filter identifier that can be used with
2870 * g_dbus_connection_remove_filter().
2875 g_dbus_connection_add_filter (GDBusConnection *connection,
2876 GDBusMessageFilterFunction filter_function,
2878 GDestroyNotify user_data_free_func)
2882 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
2883 g_return_val_if_fail (filter_function != NULL, 0);
2885 CONNECTION_LOCK (connection);
2886 data = g_new0 (FilterData, 1);
2887 data->id = _global_filter_id++; /* TODO: overflow etc. */
2888 data->filter_function = filter_function;
2889 data->user_data = user_data;
2890 data->user_data_free_func = user_data_free_func;
2891 g_ptr_array_add (connection->filters, data);
2892 CONNECTION_UNLOCK (connection);
2897 /* only called from finalize(), removes all filters */
2899 purge_all_filters (GDBusConnection *connection)
2902 for (n = 0; n < connection->filters->len; n++)
2904 FilterData *data = connection->filters->pdata[n];
2905 if (data->user_data_free_func != NULL)
2906 data->user_data_free_func (data->user_data);
2912 * g_dbus_connection_remove_filter:
2913 * @connection: a #GDBusConnection
2914 * @filter_id: an identifier obtained from g_dbus_connection_add_filter()
2921 g_dbus_connection_remove_filter (GDBusConnection *connection,
2925 FilterData *to_destroy;
2927 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
2929 CONNECTION_LOCK (connection);
2931 for (n = 0; n < connection->filters->len; n++)
2933 FilterData *data = connection->filters->pdata[n];
2934 if (data->id == filter_id)
2936 g_ptr_array_remove_index (connection->filters, n);
2941 CONNECTION_UNLOCK (connection);
2943 /* do free without holding lock */
2944 if (to_destroy != NULL)
2946 if (to_destroy->user_data_free_func != NULL)
2947 to_destroy->user_data_free_func (to_destroy->user_data);
2948 g_free (to_destroy);
2952 g_warning ("g_dbus_connection_remove_filter: No filter found for filter_id %d", filter_id);
2956 /* ---------------------------------------------------------------------------------------------------- */
2962 gchar *sender_unique_name; /* if sender is unique or org.freedesktop.DBus, then that name... otherwise blank */
2963 gchar *interface_name;
2967 GArray *subscribers;
2972 GDBusSignalCallback callback;
2974 GDestroyNotify user_data_free_func;
2976 GMainContext *context;
2980 signal_data_free (SignalData *signal_data)
2982 g_free (signal_data->rule);
2983 g_free (signal_data->sender);
2984 g_free (signal_data->sender_unique_name);
2985 g_free (signal_data->interface_name);
2986 g_free (signal_data->member);
2987 g_free (signal_data->object_path);
2988 g_free (signal_data->arg0);
2989 g_array_free (signal_data->subscribers, TRUE);
2990 g_free (signal_data);
2994 args_to_rule (const gchar *sender,
2995 const gchar *interface_name,
2996 const gchar *member,
2997 const gchar *object_path,
3003 rule = g_string_new ("type='signal'");
3005 g_string_prepend_c (rule, '-');
3007 g_string_append_printf (rule, ",sender='%s'", sender);
3008 if (interface_name != NULL)
3009 g_string_append_printf (rule, ",interface='%s'", interface_name);
3011 g_string_append_printf (rule, ",member='%s'", member);
3012 if (object_path != NULL)
3013 g_string_append_printf (rule, ",path='%s'", object_path);
3015 g_string_append_printf (rule, ",arg0='%s'", arg0);
3017 return g_string_free (rule, FALSE);
3020 static guint _global_subscriber_id = 1;
3021 static guint _global_registration_id = 1;
3022 static guint _global_subtree_registration_id = 1;
3024 /* ---------------------------------------------------------------------------------------------------- */
3026 /* must hold lock when calling */
3028 add_match_rule (GDBusConnection *connection,
3029 const gchar *match_rule)
3032 GDBusMessage *message;
3034 if (match_rule[0] == '-')
3037 message = g_dbus_message_new_method_call ("org.freedesktop.DBus", /* name */
3038 "/org/freedesktop/DBus", /* path */
3039 "org.freedesktop.DBus", /* interface */
3041 g_dbus_message_set_body (message, g_variant_new ("(s)", match_rule));
3043 if (!g_dbus_connection_send_message_unlocked (connection,
3045 G_DBUS_SEND_MESSAGE_FLAGS_NONE,
3049 g_critical ("Error while sending AddMatch() message: %s", error->message);
3050 g_error_free (error);
3052 g_object_unref (message);
3055 /* ---------------------------------------------------------------------------------------------------- */
3057 /* must hold lock when calling */
3059 remove_match_rule (GDBusConnection *connection,
3060 const gchar *match_rule)
3063 GDBusMessage *message;
3065 if (match_rule[0] == '-')
3068 message = g_dbus_message_new_method_call ("org.freedesktop.DBus", /* name */
3069 "/org/freedesktop/DBus", /* path */
3070 "org.freedesktop.DBus", /* interface */
3072 g_dbus_message_set_body (message, g_variant_new ("(s)", match_rule));
3075 if (!g_dbus_connection_send_message_unlocked (connection,
3077 G_DBUS_SEND_MESSAGE_FLAGS_NONE,
3081 g_critical ("Error while sending RemoveMatch() message: %s", error->message);
3082 g_error_free (error);
3084 g_object_unref (message);
3087 /* ---------------------------------------------------------------------------------------------------- */
3090 is_signal_data_for_name_lost_or_acquired (SignalData *signal_data)
3092 return g_strcmp0 (signal_data->sender_unique_name, "org.freedesktop.DBus") == 0 &&
3093 g_strcmp0 (signal_data->interface_name, "org.freedesktop.DBus") == 0 &&
3094 g_strcmp0 (signal_data->object_path, "/org/freedesktop/DBus") == 0 &&
3095 (g_strcmp0 (signal_data->member, "NameLost") == 0 ||
3096 g_strcmp0 (signal_data->member, "NameAcquired") == 0);
3099 /* ---------------------------------------------------------------------------------------------------- */
3102 * g_dbus_connection_signal_subscribe:
3103 * @connection: A #GDBusConnection.
3104 * @sender: (allow-none): Sender name to match on (unique or well-known name)
3105 * or %NULL to listen from all senders.
3106 * @interface_name: (allow-none): D-Bus interface name to match on or %NULL to
3107 * match on all interfaces.
3108 * @member: (allow-none): D-Bus signal name to match on or %NULL to match on all signals.
3109 * @object_path: (allow-none): Object path to match on or %NULL to match on all object paths.
3110 * @arg0: (allow-none): Contents of first string argument to match on or %NULL
3111 * to match on all kinds of arguments.
3112 * @flags: Flags describing how to subscribe to the signal (currently unused).
3113 * @callback: Callback to invoke when there is a signal matching the requested data.
3114 * @user_data: User data to pass to @callback.
3115 * @user_data_free_func: Function to free @user_data with when subscription is removed or %NULL.
3117 * Subscribes to signals on @connection and invokes @callback with a
3118 * whenever the signal is received. Note that @callback
3119 * will be invoked in the <link
3120 * linkend="g-main-context-push-thread-default">thread-default main
3121 * loop</link> of the thread you are calling this method from.
3123 * If @connection is not a message bus connection, @sender must be
3126 * If @sender is a well-known name note that @callback is invoked with
3127 * the unique name for the owner of @sender, not the well-known name
3128 * as one would expect. This is because the message bus rewrites the
3129 * name. As such, to avoid certain race conditions, users should be
3130 * tracking the name owner of the well-known name and use that when
3131 * processing the received signal.
3133 * Returns: A subscription identifier that can be used with g_dbus_connection_signal_unsubscribe().
3138 g_dbus_connection_signal_subscribe (GDBusConnection *connection,
3139 const gchar *sender,
3140 const gchar *interface_name,
3141 const gchar *member,
3142 const gchar *object_path,
3144 GDBusSignalFlags flags,
3145 GDBusSignalCallback callback,
3147 GDestroyNotify user_data_free_func)
3150 SignalData *signal_data;
3151 SignalSubscriber subscriber;
3152 GPtrArray *signal_data_array;
3153 const gchar *sender_unique_name;
3155 /* Right now we abort if AddMatch() fails since it can only fail with the bus being in
3156 * an OOM condition. We might want to change that but that would involve making
3157 * g_dbus_connection_signal_subscribe() asynchronous and having the call sites
3158 * handle that. And there's really no sensible way of handling this short of retrying
3159 * to add the match rule... and then there's the little thing that, hey, maybe there's
3160 * a reason the bus in an OOM condition.
3162 * Doable, but not really sure it's worth it...
3165 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
3166 g_return_val_if_fail (sender == NULL || (g_dbus_is_name (sender) && (connection->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION)), 0);
3167 g_return_val_if_fail (interface_name == NULL || g_dbus_is_interface_name (interface_name), 0);
3168 g_return_val_if_fail (member == NULL || g_dbus_is_member_name (member), 0);
3169 g_return_val_if_fail (object_path == NULL || g_variant_is_object_path (object_path), 0);
3170 g_return_val_if_fail (callback != NULL, 0);
3172 CONNECTION_LOCK (connection);
3174 /* If G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE was specified, we will end up
3175 * with a '-' character to prefix the rule (which will otherwise be
3178 * This allows us to hash the rule and do our lifecycle tracking in
3179 * the usual way, but the '-' prevents the match rule from ever
3180 * actually being send to the bus (either for add or remove).
3182 rule = args_to_rule (sender, interface_name, member, object_path, arg0,
3183 (flags & G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE) != 0);
3185 if (sender != NULL && (g_dbus_is_unique_name (sender) || g_strcmp0 (sender, "org.freedesktop.DBus") == 0))
3186 sender_unique_name = sender;
3188 sender_unique_name = "";
3190 subscriber.callback = callback;
3191 subscriber.user_data = user_data;
3192 subscriber.user_data_free_func = user_data_free_func;
3193 subscriber.id = _global_subscriber_id++; /* TODO: overflow etc. */
3194 subscriber.context = g_main_context_get_thread_default ();
3195 if (subscriber.context != NULL)
3196 g_main_context_ref (subscriber.context);
3198 /* see if we've already have this rule */
3199 signal_data = g_hash_table_lookup (connection->map_rule_to_signal_data, rule);
3200 if (signal_data != NULL)
3202 g_array_append_val (signal_data->subscribers, subscriber);
3207 signal_data = g_new0 (SignalData, 1);
3208 signal_data->rule = rule;
3209 signal_data->sender = g_strdup (sender);
3210 signal_data->sender_unique_name = g_strdup (sender_unique_name);
3211 signal_data->interface_name = g_strdup (interface_name);
3212 signal_data->member = g_strdup (member);
3213 signal_data->object_path = g_strdup (object_path);
3214 signal_data->arg0 = g_strdup (arg0);
3215 signal_data->subscribers = g_array_new (FALSE, FALSE, sizeof (SignalSubscriber));
3216 g_array_append_val (signal_data->subscribers, subscriber);
3218 g_hash_table_insert (connection->map_rule_to_signal_data,
3222 /* Add the match rule to the bus...
3224 * Avoid adding match rules for NameLost and NameAcquired messages - the bus will
3225 * always send such messages to us.
3227 if (connection->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION)
3229 if (!is_signal_data_for_name_lost_or_acquired (signal_data))
3230 add_match_rule (connection, signal_data->rule);
3233 signal_data_array = g_hash_table_lookup (connection->map_sender_unique_name_to_signal_data_array,
3234 signal_data->sender_unique_name);
3235 if (signal_data_array == NULL)
3237 signal_data_array = g_ptr_array_new ();
3238 g_hash_table_insert (connection->map_sender_unique_name_to_signal_data_array,
3239 g_strdup (signal_data->sender_unique_name),
3242 g_ptr_array_add (signal_data_array, signal_data);
3245 g_hash_table_insert (connection->map_id_to_signal_data,
3246 GUINT_TO_POINTER (subscriber.id),
3249 CONNECTION_UNLOCK (connection);
3251 return subscriber.id;
3254 /* ---------------------------------------------------------------------------------------------------- */
3256 /* must hold lock when calling this (except if connection->finalizing is TRUE) */
3258 unsubscribe_id_internal (GDBusConnection *connection,
3259 guint subscription_id,
3260 GArray *out_removed_subscribers)
3262 SignalData *signal_data;
3263 GPtrArray *signal_data_array;
3266 signal_data = g_hash_table_lookup (connection->map_id_to_signal_data,
3267 GUINT_TO_POINTER (subscription_id));
3268 if (signal_data == NULL)
3270 /* Don't warn here, we may have thrown all subscriptions out when the connection was closed */
3274 for (n = 0; n < signal_data->subscribers->len; n++)
3276 SignalSubscriber *subscriber;
3278 subscriber = &(g_array_index (signal_data->subscribers, SignalSubscriber, n));
3279 if (subscriber->id != subscription_id)
3282 g_warn_if_fail (g_hash_table_remove (connection->map_id_to_signal_data,
3283 GUINT_TO_POINTER (subscription_id)));
3284 g_array_append_val (out_removed_subscribers, *subscriber);
3285 g_array_remove_index (signal_data->subscribers, n);
3287 if (signal_data->subscribers->len == 0)
3289 g_warn_if_fail (g_hash_table_remove (connection->map_rule_to_signal_data, signal_data->rule));
3291 signal_data_array = g_hash_table_lookup (connection->map_sender_unique_name_to_signal_data_array,
3292 signal_data->sender_unique_name);
3293 g_warn_if_fail (signal_data_array != NULL);
3294 g_warn_if_fail (g_ptr_array_remove (signal_data_array, signal_data));
3296 if (signal_data_array->len == 0)
3298 g_warn_if_fail (g_hash_table_remove (connection->map_sender_unique_name_to_signal_data_array,
3299 signal_data->sender_unique_name));
3302 /* remove the match rule from the bus unless NameLost or NameAcquired (see subscribe()) */
3303 if (connection->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION)
3305 if (!is_signal_data_for_name_lost_or_acquired (signal_data))
3306 if (!connection->closed && !connection->finalizing)
3307 remove_match_rule (connection, signal_data->rule);
3309 signal_data_free (signal_data);
3315 g_assert_not_reached ();
3322 * g_dbus_connection_signal_unsubscribe:
3323 * @connection: A #GDBusConnection.
3324 * @subscription_id: A subscription id obtained from g_dbus_connection_signal_subscribe().
3326 * Unsubscribes from signals.
3331 g_dbus_connection_signal_unsubscribe (GDBusConnection *connection,
3332 guint subscription_id)
3334 GArray *subscribers;
3337 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
3339 subscribers = g_array_new (FALSE, FALSE, sizeof (SignalSubscriber));
3341 CONNECTION_LOCK (connection);
3342 unsubscribe_id_internal (connection,
3345 CONNECTION_UNLOCK (connection);
3348 g_assert (subscribers->len == 0 || subscribers->len == 1);
3350 /* call GDestroyNotify without lock held */
3351 for (n = 0; n < subscribers->len; n++)
3353 SignalSubscriber *subscriber;
3354 subscriber = &(g_array_index (subscribers, SignalSubscriber, n));
3355 call_destroy_notify (subscriber->context,
3356 subscriber->user_data_free_func,
3357 subscriber->user_data);
3358 if (subscriber->context != NULL)
3359 g_main_context_unref (subscriber->context);
3362 g_array_free (subscribers, TRUE);
3365 /* ---------------------------------------------------------------------------------------------------- */
3369 guint subscription_id;
3370 GDBusSignalCallback callback;
3372 GDBusMessage *message;
3373 GDBusConnection *connection;
3374 const gchar *sender;
3376 const gchar *interface;
3377 const gchar *member;
3380 /* called on delivery thread (e.g. where g_dbus_connection_signal_subscribe() was called) with
3384 emit_signal_instance_in_idle_cb (gpointer data)
3386 SignalInstance *signal_instance = data;
3387 GVariant *parameters;
3388 gboolean has_subscription;
3390 parameters = g_dbus_message_get_body (signal_instance->message);
3391 if (parameters == NULL)
3393 parameters = g_variant_new ("()");
3394 g_variant_ref_sink (parameters);
3398 g_variant_ref_sink (parameters);
3402 g_print ("in emit_signal_instance_in_idle_cb (id=%d sender=%s path=%s interface=%s member=%s params=%s)\n",
3403 signal_instance->subscription_id,
3404 signal_instance->sender,
3405 signal_instance->path,
3406 signal_instance->interface,
3407 signal_instance->member,
3408 g_variant_print (parameters, TRUE));
3411 /* Careful here, don't do the callback if we no longer has the subscription */
3412 CONNECTION_LOCK (signal_instance->connection);
3413 has_subscription = FALSE;
3414 if (g_hash_table_lookup (signal_instance->connection->map_id_to_signal_data,
3415 GUINT_TO_POINTER (signal_instance->subscription_id)) != NULL)
3416 has_subscription = TRUE;
3417 CONNECTION_UNLOCK (signal_instance->connection);
3419 if (has_subscription)
3420 signal_instance->callback (signal_instance->connection,
3421 signal_instance->sender,
3422 signal_instance->path,
3423 signal_instance->interface,
3424 signal_instance->member,
3426 signal_instance->user_data);
3428 if (parameters != NULL)
3429 g_variant_unref (parameters);
3435 signal_instance_free (SignalInstance *signal_instance)
3437 g_object_unref (signal_instance->message);
3438 g_object_unref (signal_instance->connection);
3439 g_free (signal_instance);
3442 /* called in message handler thread WITH lock held */
3444 schedule_callbacks (GDBusConnection *connection,
3445 GPtrArray *signal_data_array,
3446 GDBusMessage *message,
3447 const gchar *sender)
3450 const gchar *interface;
3451 const gchar *member;
3460 interface = g_dbus_message_get_interface (message);
3461 member = g_dbus_message_get_member (message);
3462 path = g_dbus_message_get_path (message);
3463 arg0 = g_dbus_message_get_arg0 (message);
3466 g_print ("In schedule_callbacks:\n"
3468 " interface = `%s'\n"
3479 /* TODO: if this is slow, then we can change signal_data_array into
3480 * map_object_path_to_signal_data_array or something.
3482 for (n = 0; n < signal_data_array->len; n++)
3484 SignalData *signal_data = signal_data_array->pdata[n];
3486 if (signal_data->interface_name != NULL && g_strcmp0 (signal_data->interface_name, interface) != 0)
3489 if (signal_data->member != NULL && g_strcmp0 (signal_data->member, member) != 0)
3492 if (signal_data->object_path != NULL && g_strcmp0 (signal_data->object_path, path) != 0)
3495 if (signal_data->arg0 != NULL && g_strcmp0 (signal_data->arg0, arg0) != 0)
3498 for (m = 0; m < signal_data->subscribers->len; m++)
3500 SignalSubscriber *subscriber;
3501 GSource *idle_source;
3502 SignalInstance *signal_instance;
3504 subscriber = &(g_array_index (signal_data->subscribers, SignalSubscriber, m));
3506 signal_instance = g_new0 (SignalInstance, 1);
3507 signal_instance->subscription_id = subscriber->id;
3508 signal_instance->callback = subscriber->callback;
3509 signal_instance->user_data = subscriber->user_data;
3510 signal_instance->message = g_object_ref (message);
3511 signal_instance->connection = g_object_ref (connection);
3512 signal_instance->sender = sender;
3513 signal_instance->path = path;
3514 signal_instance->interface = interface;
3515 signal_instance->member = member;
3517 idle_source = g_idle_source_new ();
3518 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
3519 g_source_set_callback (idle_source,
3520 emit_signal_instance_in_idle_cb,
3522 (GDestroyNotify) signal_instance_free);
3523 g_source_attach (idle_source, subscriber->context);
3524 g_source_unref (idle_source);
3529 /* called in message handler thread with lock held */
3531 distribute_signals (GDBusConnection *connection,
3532 GDBusMessage *message)
3534 GPtrArray *signal_data_array;
3535 const gchar *sender;
3537 sender = g_dbus_message_get_sender (message);
3539 if (G_UNLIKELY (_g_dbus_debug_signal ()))
3541 _g_dbus_debug_print_lock ();
3542 g_print ("========================================================================\n"
3543 "GDBus-debug:Signal:\n"
3544 " <<<< RECEIVED SIGNAL %s.%s\n"
3546 " sent by name %s\n",
3547 g_dbus_message_get_interface (message),
3548 g_dbus_message_get_member (message),
3549 g_dbus_message_get_path (message),
3550 sender != NULL ? sender : "(none)");
3551 _g_dbus_debug_print_unlock ();
3554 /* collect subscribers that match on sender */
3557 signal_data_array = g_hash_table_lookup (connection->map_sender_unique_name_to_signal_data_array, sender);
3558 if (signal_data_array != NULL)
3559 schedule_callbacks (connection, signal_data_array, message, sender);
3562 /* collect subscribers not matching on sender */
3563 signal_data_array = g_hash_table_lookup (connection->map_sender_unique_name_to_signal_data_array, "");
3564 if (signal_data_array != NULL)
3565 schedule_callbacks (connection, signal_data_array, message, sender);
3568 /* ---------------------------------------------------------------------------------------------------- */
3570 /* only called from finalize(), removes all subscriptions */
3572 purge_all_signal_subscriptions (GDBusConnection *connection)
3574 GHashTableIter iter;
3577 GArray *subscribers;
3580 ids = g_array_new (FALSE, FALSE, sizeof (guint));
3581 g_hash_table_iter_init (&iter, connection->map_id_to_signal_data);
3582 while (g_hash_table_iter_next (&iter, &key, NULL))
3584 guint subscription_id = GPOINTER_TO_UINT (key);
3585 g_array_append_val (ids, subscription_id);
3588 subscribers = g_array_new (FALSE, FALSE, sizeof (SignalSubscriber));
3589 for (n = 0; n < ids->len; n++)
3591 guint subscription_id = g_array_index (ids, guint, n);
3592 unsubscribe_id_internal (connection,
3596 g_array_free (ids, TRUE);
3598 /* call GDestroyNotify without lock held */
3599 for (n = 0; n < subscribers->len; n++)
3601 SignalSubscriber *subscriber;
3602 subscriber = &(g_array_index (subscribers, SignalSubscriber, n));
3603 call_destroy_notify (subscriber->context,
3604 subscriber->user_data_free_func,
3605 subscriber->user_data);
3606 if (subscriber->context != NULL)
3607 g_main_context_unref (subscriber->context);
3610 g_array_free (subscribers, TRUE);
3613 /* ---------------------------------------------------------------------------------------------------- */
3615 static GDBusInterfaceVTable *
3616 _g_dbus_interface_vtable_copy (const GDBusInterfaceVTable *vtable)
3618 /* Don't waste memory by copying padding - remember to update this
3619 * when changing struct _GDBusInterfaceVTable in gdbusconnection.h
3621 return g_memdup ((gconstpointer) vtable, 3 * sizeof (gpointer));
3625 _g_dbus_interface_vtable_free (GDBusInterfaceVTable *vtable)
3630 /* ---------------------------------------------------------------------------------------------------- */
3632 static GDBusSubtreeVTable *
3633 _g_dbus_subtree_vtable_copy (const GDBusSubtreeVTable *vtable)
3635 /* Don't waste memory by copying padding - remember to update this
3636 * when changing struct _GDBusSubtreeVTable in gdbusconnection.h
3638 return g_memdup ((gconstpointer) vtable, 3 * sizeof (gpointer));
3642 _g_dbus_subtree_vtable_free (GDBusSubtreeVTable *vtable)
3647 /* ---------------------------------------------------------------------------------------------------- */
3649 struct ExportedObject
3652 GDBusConnection *connection;
3654 /* maps gchar* -> ExportedInterface* */
3655 GHashTable *map_if_name_to_ei;
3658 /* only called with lock held */
3660 exported_object_free (ExportedObject *eo)
3662 g_free (eo->object_path);
3663 g_hash_table_unref (eo->map_if_name_to_ei);
3672 gchar *interface_name;
3673 GDBusInterfaceVTable *vtable;
3674 GDBusInterfaceInfo *interface_info;
3676 GMainContext *context;
3678 GDestroyNotify user_data_free_func;
3679 } ExportedInterface;
3681 /* called with lock held */
3683 exported_interface_free (ExportedInterface *ei)
3685 g_dbus_interface_info_cache_release (ei->interface_info);
3686 g_dbus_interface_info_unref ((GDBusInterfaceInfo *) ei->interface_info);
3688 call_destroy_notify (ei->context,
3689 ei->user_data_free_func,
3692 if (ei->context != NULL)
3693 g_main_context_unref (ei->context);
3695 g_free (ei->interface_name);
3696 _g_dbus_interface_vtable_free (ei->vtable);
3700 /* ---------------------------------------------------------------------------------------------------- */
3702 /* Convenience function to check if @registration_id (if not zero) or
3703 * @subtree_registration_id (if not zero) has been unregistered. If
3704 * so, returns %TRUE.
3706 * Caller must *not* hold lock.
3709 has_object_been_unregistered (GDBusConnection *connection,
3710 guint registration_id,
3711 guint subtree_registration_id)
3715 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
3719 CONNECTION_LOCK (connection);
3720 if (registration_id != 0 && g_hash_table_lookup (connection->map_id_to_ei,
3721 GUINT_TO_POINTER (registration_id)) == NULL)
3725 else if (subtree_registration_id != 0 && g_hash_table_lookup (connection->map_id_to_es,
3726 GUINT_TO_POINTER (subtree_registration_id)) == NULL)
3730 CONNECTION_UNLOCK (connection);
3735 /* ---------------------------------------------------------------------------------------------------- */
3739 GDBusConnection *connection;
3740 GDBusMessage *message;
3742 const gchar *property_name;
3743 const GDBusInterfaceVTable *vtable;
3744 GDBusInterfaceInfo *interface_info;
3745 const GDBusPropertyInfo *property_info;
3746 guint registration_id;
3747 guint subtree_registration_id;
3751 property_data_free (PropertyData *data)
3753 g_object_unref (data->connection);
3754 g_object_unref (data->message);
3758 /* called in thread where object was registered - no locks held */
3760 invoke_get_property_in_idle_cb (gpointer _data)
3762 PropertyData *data = _data;
3765 GDBusMessage *reply;
3767 if (has_object_been_unregistered (data->connection,
3768 data->registration_id,
3769 data->subtree_registration_id))
3771 reply = g_dbus_message_new_method_error (data->message,
3772 "org.freedesktop.DBus.Error.UnknownMethod",
3773 _("No such interface `org.freedesktop.DBus.Properties' on object at path %s"),
3774 g_dbus_message_get_path (data->message));
3775 g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
3776 g_object_unref (reply);
3781 value = data->vtable->get_property (data->connection,
3782 g_dbus_message_get_sender (data->message),
3783 g_dbus_message_get_path (data->message),
3784 data->interface_info->name,
3785 data->property_name,
3792 g_assert_no_error (error);
3794 if (g_variant_is_floating (value))
3795 g_variant_ref_sink (value);
3796 reply = g_dbus_message_new_method_reply (data->message);
3797 g_dbus_message_set_body (reply, g_variant_new ("(v)", value));
3798 g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
3799 g_variant_unref (value);
3800 g_object_unref (reply);
3804 gchar *dbus_error_name;
3805 g_assert (error != NULL);
3806 dbus_error_name = g_dbus_error_encode_gerror (error);
3807 reply = g_dbus_message_new_method_error_literal (data->message,
3810 g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
3811 g_free (dbus_error_name);
3812 g_error_free (error);
3813 g_object_unref (reply);
3820 /* called in thread where object was registered - no locks held */
3822 invoke_set_property_in_idle_cb (gpointer _data)
3824 PropertyData *data = _data;
3826 GDBusMessage *reply;
3832 g_variant_get (g_dbus_message_get_body (data->message),
3838 /* Fail with org.freedesktop.DBus.Error.InvalidArgs if the type
3839 * of the given value is wrong
3841 if (g_strcmp0 (g_variant_get_type_string (value), data->property_info->signature) != 0)
3843 reply = g_dbus_message_new_method_error (data->message,
3844 "org.freedesktop.DBus.Error.InvalidArgs",
3845 _("Error setting property `%s': Expected type `%s' but got `%s'"),
3846 data->property_info->name,
3847 data->property_info->signature,
3848 g_variant_get_type_string (value));
3852 if (!data->vtable->set_property (data->connection,
3853 g_dbus_message_get_sender (data->message),
3854 g_dbus_message_get_path (data->message),
3855 data->interface_info->name,
3856 data->property_name,
3861 gchar *dbus_error_name;
3862 g_assert (error != NULL);
3863 dbus_error_name = g_dbus_error_encode_gerror (error);
3864 reply = g_dbus_message_new_method_error_literal (data->message,
3867 g_free (dbus_error_name);
3868 g_error_free (error);
3872 reply = g_dbus_message_new_method_reply (data->message);
3876 g_assert (reply != NULL);
3877 g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
3878 g_object_unref (reply);
3879 g_variant_unref (value);
3884 /* called with lock held */
3886 validate_and_maybe_schedule_property_getset (GDBusConnection *connection,
3887 GDBusMessage *message,
3888 guint registration_id,
3889 guint subtree_registration_id,
3891 GDBusInterfaceInfo *interface_info,
3892 const GDBusInterfaceVTable *vtable,
3893 GMainContext *main_context,
3897 const char *interface_name;
3898 const char *property_name;
3899 const GDBusPropertyInfo *property_info;
3900 GSource *idle_source;
3901 PropertyData *property_data;
3902 GDBusMessage *reply;
3907 g_variant_get (g_dbus_message_get_body (message),
3912 g_variant_get (g_dbus_message_get_body (message),
3921 if (vtable == NULL || vtable->get_property == NULL)
3926 if (vtable == NULL || vtable->set_property == NULL)
3930 /* Check that the property exists - if not fail with org.freedesktop.DBus.Error.InvalidArgs
3932 property_info = NULL;
3934 /* TODO: the cost of this is O(n) - it might be worth caching the result */
3935 property_info = g_dbus_interface_info_lookup_property (interface_info, property_name);
3936 if (property_info == NULL)
3938 reply = g_dbus_message_new_method_error (message,
3939 "org.freedesktop.DBus.Error.InvalidArgs",
3940 _("No such property `%s'"),
3942 g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
3943 g_object_unref (reply);
3948 if (is_get && !(property_info->flags & G_DBUS_PROPERTY_INFO_FLAGS_READABLE))
3950 reply = g_dbus_message_new_method_error (message,
3951 "org.freedesktop.DBus.Error.InvalidArgs",
3952 _("Property `%s' is not readable"),
3954 g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
3955 g_object_unref (reply);
3959 else if (!is_get && !(property_info->flags & G_DBUS_PROPERTY_INFO_FLAGS_WRITABLE))
3961 reply = g_dbus_message_new_method_error (message,
3962 "org.freedesktop.DBus.Error.InvalidArgs",
3963 _("Property `%s' is not writable"),
3965 g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
3966 g_object_unref (reply);
3971 /* ok, got the property info - call user code in an idle handler */
3972 property_data = g_new0 (PropertyData, 1);
3973 property_data->connection = g_object_ref (connection);
3974 property_data->message = g_object_ref (message);
3975 property_data->user_data = user_data;
3976 property_data->property_name = property_name;
3977 property_data->vtable = vtable;
3978 property_data->interface_info = interface_info;
3979 property_data->property_info = property_info;
3980 property_data->registration_id = registration_id;
3981 property_data->subtree_registration_id = subtree_registration_id;
3983 idle_source = g_idle_source_new ();
3984 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
3985 g_source_set_callback (idle_source,
3986 is_get ? invoke_get_property_in_idle_cb : invoke_set_property_in_idle_cb,
3988 (GDestroyNotify) property_data_free);
3989 g_source_attach (idle_source, main_context);
3990 g_source_unref (idle_source);
3998 /* called with lock held */
4000 handle_getset_property (GDBusConnection *connection,
4002 GDBusMessage *message,
4005 ExportedInterface *ei;
4007 const char *interface_name;
4008 const char *property_name;
4013 g_variant_get (g_dbus_message_get_body (message),
4018 g_variant_get (g_dbus_message_get_body (message),
4024 /* Fail with org.freedesktop.DBus.Error.InvalidArgs if there is
4025 * no such interface registered
4027 ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_name);
4030 GDBusMessage *reply;
4031 reply = g_dbus_message_new_method_error (message,
4032 "org.freedesktop.DBus.Error.InvalidArgs",
4033 _("No such interface `%s'"),
4035 g_dbus_connection_send_message_unlocked (eo->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
4036 g_object_unref (reply);
4041 handled = validate_and_maybe_schedule_property_getset (eo->connection,
4054 /* ---------------------------------------------------------------------------------------------------- */
4058 GDBusConnection *connection;
4059 GDBusMessage *message;
4061 const GDBusInterfaceVTable *vtable;
4062 GDBusInterfaceInfo *interface_info;
4063 guint registration_id;
4064 guint subtree_registration_id;
4065 } PropertyGetAllData;
4068 property_get_all_data_free (PropertyData *data)
4070 g_object_unref (data->connection);
4071 g_object_unref (data->message);
4075 /* called in thread where object was registered - no locks held */
4077 invoke_get_all_properties_in_idle_cb (gpointer _data)
4079 PropertyGetAllData *data = _data;
4080 GVariantBuilder builder;
4081 GDBusMessage *reply;
4084 if (has_object_been_unregistered (data->connection,
4085 data->registration_id,
4086 data->subtree_registration_id))
4088 reply = g_dbus_message_new_method_error (data->message,
4089 "org.freedesktop.DBus.Error.UnknownMethod",
4090 _("No such interface `org.freedesktop.DBus.Properties' on object at path %s"),
4091 g_dbus_message_get_path (data->message));
4092 g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
4093 g_object_unref (reply);
4097 /* TODO: Right now we never fail this call - we just omit values if
4098 * a get_property() call is failing.
4100 * We could fail the whole call if just a single get_property() call
4101 * returns an error. We need clarification in the D-Bus spec about this.
4103 g_variant_builder_init (&builder, G_VARIANT_TYPE ("(a{sv})"));
4104 g_variant_builder_open (&builder, G_VARIANT_TYPE ("a{sv}"));
4105 for (n = 0; data->interface_info->properties != NULL && data->interface_info->properties[n] != NULL; n++)
4107 const GDBusPropertyInfo *property_info = data->interface_info->properties[n];
4110 if (!(property_info->flags & G_DBUS_PROPERTY_INFO_FLAGS_READABLE))
4113 value = data->vtable->get_property (data->connection,
4114 g_dbus_message_get_sender (data->message),
4115 g_dbus_message_get_path (data->message),
4116 data->interface_info->name,
4117 property_info->name,
4124 if (g_variant_is_floating (value))
4125 g_variant_ref_sink (value);
4126 g_variant_builder_add (&builder,
4128 property_info->name,
4130 g_variant_unref (value);
4132 g_variant_builder_close (&builder);
4134 reply = g_dbus_message_new_method_reply (data->message);
4135 g_dbus_message_set_body (reply, g_variant_builder_end (&builder));
4136 g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
4137 g_object_unref (reply);
4143 /* called with lock held */
4145 validate_and_maybe_schedule_property_get_all (GDBusConnection *connection,
4146 GDBusMessage *message,
4147 guint registration_id,
4148 guint subtree_registration_id,
4149 GDBusInterfaceInfo *interface_info,
4150 const GDBusInterfaceVTable *vtable,
4151 GMainContext *main_context,
4155 const char *interface_name;
4156 GSource *idle_source;
4157 PropertyGetAllData *property_get_all_data;
4161 g_variant_get (g_dbus_message_get_body (message),
4165 if (vtable == NULL || vtable->get_property == NULL)
4168 /* ok, got the property info - call user in an idle handler */
4169 property_get_all_data = g_new0 (PropertyGetAllData, 1);
4170 property_get_all_data->connection = g_object_ref (connection);
4171 property_get_all_data->message = g_object_ref (message);
4172 property_get_all_data->user_data = user_data;
4173 property_get_all_data->vtable = vtable;
4174 property_get_all_data->interface_info = interface_info;
4175 property_get_all_data->registration_id = registration_id;
4176 property_get_all_data->subtree_registration_id = subtree_registration_id;
4178 idle_source = g_idle_source_new ();
4179 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
4180 g_source_set_callback (idle_source,
4181 invoke_get_all_properties_in_idle_cb,
4182 property_get_all_data,
4183 (GDestroyNotify) property_get_all_data_free);
4184 g_source_attach (idle_source, main_context);
4185 g_source_unref (idle_source);
4193 /* called with lock held */
4195 handle_get_all_properties (GDBusConnection *connection,
4197 GDBusMessage *message)
4199 ExportedInterface *ei;
4201 const char *interface_name;
4205 g_variant_get (g_dbus_message_get_body (message),
4209 /* Fail with org.freedesktop.DBus.Error.InvalidArgs if there is
4210 * no such interface registered
4212 ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_name);
4215 GDBusMessage *reply;
4216 reply = g_dbus_message_new_method_error (message,
4217 "org.freedesktop.DBus.Error.InvalidArgs",
4218 _("No such interface"),
4220 g_dbus_connection_send_message_unlocked (eo->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
4221 g_object_unref (reply);
4226 handled = validate_and_maybe_schedule_property_get_all (eo->connection,
4238 /* ---------------------------------------------------------------------------------------------------- */
4240 static const gchar introspect_header[] =
4241 "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\"\n"
4242 " \"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
4243 "<!-- GDBus " PACKAGE_VERSION " -->\n"
4246 static const gchar introspect_tail[] =
4249 static const gchar introspect_properties_interface[] =
4250 " <interface name=\"org.freedesktop.DBus.Properties\">\n"
4251 " <method name=\"Get\">\n"
4252 " <arg type=\"s\" name=\"interface_name\" direction=\"in\"/>\n"
4253 " <arg type=\"s\" name=\"property_name\" direction=\"in\"/>\n"
4254 " <arg type=\"v\" name=\"value\" direction=\"out\"/>\n"
4256 " <method name=\"GetAll\">\n"
4257 " <arg type=\"s\" name=\"interface_name\" direction=\"in\"/>\n"
4258 " <arg type=\"a{sv}\" name=\"properties\" direction=\"out\"/>\n"
4260 " <method name=\"Set\">\n"
4261 " <arg type=\"s\" name=\"interface_name\" direction=\"in\"/>\n"
4262 " <arg type=\"s\" name=\"property_name\" direction=\"in\"/>\n"
4263 " <arg type=\"v\" name=\"value\" direction=\"in\"/>\n"
4265 " <signal name=\"PropertiesChanged\">\n"
4266 " <arg type=\"s\" name=\"interface_name\"/>\n"
4267 " <arg type=\"a{sv}\" name=\"changed_properties\"/>\n"
4268 " <arg type=\"as\" name=\"invalidated_properties\"/>\n"
4272 static const gchar introspect_introspectable_interface[] =
4273 " <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
4274 " <method name=\"Introspect\">\n"
4275 " <arg type=\"s\" name=\"xml_data\" direction=\"out\"/>\n"
4278 " <interface name=\"org.freedesktop.DBus.Peer\">\n"
4279 " <method name=\"Ping\"/>\n"
4280 " <method name=\"GetMachineId\">\n"
4281 " <arg type=\"s\" name=\"machine_uuid\" direction=\"out\"/>\n"
4286 introspect_append_header (GString *s)
4288 g_string_append (s, introspect_header);
4292 maybe_add_path (const gchar *path, gsize path_len, const gchar *object_path, GHashTable *set)
4294 if (g_str_has_prefix (object_path, path) && strlen (object_path) > path_len && object_path[path_len-1] == '/')
4300 begin = object_path + path_len;
4301 end = strchr (begin, '/');
4303 s = g_strndup (begin, end - begin);
4305 s = g_strdup (begin);
4307 if (g_hash_table_lookup (set, s) == NULL)
4308 g_hash_table_insert (set, s, GUINT_TO_POINTER (1));
4314 /* TODO: we want a nicer public interface for this */
4316 g_dbus_connection_list_registered_unlocked (GDBusConnection *connection,
4321 GHashTableIter hash_iter;
4322 const gchar *object_path;
4328 CONNECTION_ENSURE_LOCK (connection);
4330 path_len = strlen (path);
4334 set = g_hash_table_new (g_str_hash, g_str_equal);
4336 g_hash_table_iter_init (&hash_iter, connection->map_object_path_to_eo);
4337 while (g_hash_table_iter_next (&hash_iter, (gpointer) &object_path, NULL))
4338 maybe_add_path (path, path_len, object_path, set);
4340 g_hash_table_iter_init (&hash_iter, connection->map_object_path_to_es);
4341 while (g_hash_table_iter_next (&hash_iter, (gpointer) &object_path, NULL))
4342 maybe_add_path (path, path_len, object_path, set);
4344 p = g_ptr_array_new ();
4345 keys = g_hash_table_get_keys (set);
4346 for (l = keys; l != NULL; l = l->next)
4347 g_ptr_array_add (p, l->data);
4348 g_hash_table_unref (set);
4351 g_ptr_array_add (p, NULL);
4352 ret = (gchar **) g_ptr_array_free (p, FALSE);
4357 g_dbus_connection_list_registered (GDBusConnection *connection,
4361 CONNECTION_LOCK (connection);
4362 ret = g_dbus_connection_list_registered_unlocked (connection, path);
4363 CONNECTION_UNLOCK (connection);
4367 /* called in message handler thread with lock held */
4369 handle_introspect (GDBusConnection *connection,
4371 GDBusMessage *message)
4375 GDBusMessage *reply;
4376 GHashTableIter hash_iter;
4377 ExportedInterface *ei;
4380 /* first the header with the standard interfaces */
4381 s = g_string_sized_new (sizeof (introspect_header) +
4382 sizeof (introspect_properties_interface) +
4383 sizeof (introspect_introspectable_interface) +
4384 sizeof (introspect_tail));
4385 introspect_append_header (s);
4386 if (!g_hash_table_lookup (eo->map_if_name_to_ei,
4387 "org.freedesktop.DBus.Properties"))
4388 g_string_append (s, introspect_properties_interface);
4390 if (!g_hash_table_lookup (eo->map_if_name_to_ei,
4391 "org.freedesktop.DBus.Introspectable"))
4392 g_string_append (s, introspect_introspectable_interface);
4394 /* then include the registered interfaces */
4395 g_hash_table_iter_init (&hash_iter, eo->map_if_name_to_ei);
4396 while (g_hash_table_iter_next (&hash_iter, NULL, (gpointer) &ei))
4397 g_dbus_interface_info_generate_xml (ei->interface_info, 2, s);
4399 /* finally include nodes registered below us */
4400 registered = g_dbus_connection_list_registered_unlocked (connection, eo->object_path);
4401 for (n = 0; registered != NULL && registered[n] != NULL; n++)
4402 g_string_append_printf (s, " <node name=\"%s\"/>\n", registered[n]);
4403 g_strfreev (registered);
4404 g_string_append (s, introspect_tail);
4406 reply = g_dbus_message_new_method_reply (message);
4407 g_dbus_message_set_body (reply, g_variant_new ("(s)", s->str));
4408 g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
4409 g_object_unref (reply);
4410 g_string_free (s, TRUE);
4415 /* called in thread where object was registered - no locks held */
4417 call_in_idle_cb (gpointer user_data)
4419 GDBusMethodInvocation *invocation = G_DBUS_METHOD_INVOCATION (user_data);
4420 GDBusInterfaceVTable *vtable;
4421 guint registration_id;
4422 guint subtree_registration_id;
4424 vtable = g_object_get_data (G_OBJECT (invocation), "g-dbus-interface-vtable");
4425 g_assert (vtable != NULL && vtable->method_call != NULL);
4427 registration_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (invocation), "g-dbus-registration-id"));
4428 subtree_registration_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (invocation), "g-dbus-subtree-registration-id"));
4430 if (has_object_been_unregistered (g_dbus_method_invocation_get_connection (invocation),
4432 subtree_registration_id))
4434 GDBusMessage *reply;
4435 reply = g_dbus_message_new_method_error (g_dbus_method_invocation_get_message (invocation),
4436 "org.freedesktop.DBus.Error.UnknownMethod",
4437 _("No such interface `%s' on object at path %s"),
4438 g_dbus_method_invocation_get_interface_name (invocation),
4439 g_dbus_method_invocation_get_object_path (invocation));
4440 g_dbus_connection_send_message (g_dbus_method_invocation_get_connection (invocation), reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
4441 g_object_unref (reply);
4445 vtable->method_call (g_dbus_method_invocation_get_connection (invocation),
4446 g_dbus_method_invocation_get_sender (invocation),
4447 g_dbus_method_invocation_get_object_path (invocation),
4448 g_dbus_method_invocation_get_interface_name (invocation),
4449 g_dbus_method_invocation_get_method_name (invocation),
4450 g_dbus_method_invocation_get_parameters (invocation),
4451 g_object_ref (invocation),
4452 g_dbus_method_invocation_get_user_data (invocation));
4458 /* called in message handler thread with lock held */
4460 validate_and_maybe_schedule_method_call (GDBusConnection *connection,
4461 GDBusMessage *message,
4462 guint registration_id,
4463 guint subtree_registration_id,
4464 GDBusInterfaceInfo *interface_info,
4465 const GDBusInterfaceVTable *vtable,
4466 GMainContext *main_context,
4469 GDBusMethodInvocation *invocation;
4470 const GDBusMethodInfo *method_info;
4471 GDBusMessage *reply;
4472 GVariant *parameters;
4473 GSource *idle_source;
4475 GVariantType *in_type;
4479 /* TODO: the cost of this is O(n) - it might be worth caching the result */
4480 method_info = g_dbus_interface_info_lookup_method (interface_info, g_dbus_message_get_member (message));
4482 /* if the method doesn't exist, return the org.freedesktop.DBus.Error.UnknownMethod
4483 * error to the caller
4485 if (method_info == NULL)
4487 reply = g_dbus_message_new_method_error (message,
4488 "org.freedesktop.DBus.Error.UnknownMethod",
4489 _("No such method `%s'"),
4490 g_dbus_message_get_member (message));
4491 g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
4492 g_object_unref (reply);
4497 parameters = g_dbus_message_get_body (message);
4498 if (parameters == NULL)
4500 parameters = g_variant_new ("()");
4501 g_variant_ref_sink (parameters);
4505 g_variant_ref (parameters);
4508 /* Check that the incoming args are of the right type - if they are not, return
4509 * the org.freedesktop.DBus.Error.InvalidArgs error to the caller
4511 in_type = _g_dbus_compute_complete_signature (method_info->in_args);
4512 if (!g_variant_is_of_type (parameters, in_type))
4516 type_string = g_variant_type_dup_string (in_type);
4518 reply = g_dbus_message_new_method_error (message,
4519 "org.freedesktop.DBus.Error.InvalidArgs",
4520 _("Type of message, `%s', does not match expected type `%s'"),
4521 g_variant_get_type_string (parameters),
4523 g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
4524 g_variant_type_free (in_type);
4525 g_variant_unref (parameters);
4526 g_object_unref (reply);
4527 g_free (type_string);
4531 g_variant_type_free (in_type);
4533 /* schedule the call in idle */
4534 invocation = _g_dbus_method_invocation_new (g_dbus_message_get_sender (message),
4535 g_dbus_message_get_path (message),
4536 g_dbus_message_get_interface (message),
4537 g_dbus_message_get_member (message),
4543 g_variant_unref (parameters);
4545 /* TODO: would be nicer with a real MethodData like we already
4546 * have PropertyData and PropertyGetAllData... */
4547 g_object_set_data (G_OBJECT (invocation), "g-dbus-interface-vtable", (gpointer) vtable);
4548 g_object_set_data (G_OBJECT (invocation), "g-dbus-registration-id", GUINT_TO_POINTER (registration_id));
4549 g_object_set_data (G_OBJECT (invocation), "g-dbus-subtree-registration-id", GUINT_TO_POINTER (subtree_registration_id));
4551 idle_source = g_idle_source_new ();
4552 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
4553 g_source_set_callback (idle_source,
4557 g_source_attach (idle_source, main_context);
4558 g_source_unref (idle_source);
4566 /* ---------------------------------------------------------------------------------------------------- */
4568 /* called in message handler thread with lock held */
4570 obj_message_func (GDBusConnection *connection,
4572 GDBusMessage *message)
4574 const gchar *interface_name;
4575 const gchar *member;
4576 const gchar *signature;
4581 interface_name = g_dbus_message_get_interface (message);
4582 member = g_dbus_message_get_member (message);
4583 signature = g_dbus_message_get_signature (message);
4585 /* see if we have an interface for handling this call */
4586 if (interface_name != NULL)
4588 ExportedInterface *ei;
4589 ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_name);
4592 /* we do - invoke the handler in idle in the right thread */
4594 /* handle no vtable or handler being present */
4595 if (ei->vtable == NULL || ei->vtable->method_call == NULL)
4598 handled = validate_and_maybe_schedule_method_call (connection,
4610 if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Introspectable") == 0 &&
4611 g_strcmp0 (member, "Introspect") == 0 &&
4612 g_strcmp0 (signature, "") == 0)
4614 handled = handle_introspect (connection, eo, message);
4617 else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0 &&
4618 g_strcmp0 (member, "Get") == 0 &&
4619 g_strcmp0 (signature, "ss") == 0)
4621 handled = handle_getset_property (connection, eo, message, TRUE);
4624 else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0 &&
4625 g_strcmp0 (member, "Set") == 0 &&
4626 g_strcmp0 (signature, "ssv") == 0)
4628 handled = handle_getset_property (connection, eo, message, FALSE);
4631 else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0 &&
4632 g_strcmp0 (member, "GetAll") == 0 &&
4633 g_strcmp0 (signature, "s") == 0)
4635 handled = handle_get_all_properties (connection, eo, message);
4644 * g_dbus_connection_register_object:
4645 * @connection: A #GDBusConnection.
4646 * @object_path: The object path to register at.
4647 * @interface_info: Introspection data for the interface.
4648 * @vtable: (allow-none): A #GDBusInterfaceVTable to call into or %NULL.
4649 * @user_data: Data to pass to functions in @vtable.
4650 * @user_data_free_func: Function to call when the object path is unregistered.
4651 * @error: Return location for error or %NULL.
4653 * Registers callbacks for exported objects at @object_path with the
4654 * D-Bus interface that is described in @interface_info.
4656 * Calls to functions in @vtable (and @user_data_free_func) will
4657 * happen in the <link linkend="g-main-context-push-thread-default">thread-default main
4658 * loop</link> of the thread you are calling this method from.
4660 * Note that all #GVariant values passed to functions in @vtable will match
4661 * the signature given in @interface_info - if a remote caller passes
4662 * incorrect values, the <literal>org.freedesktop.DBus.Error.InvalidArgs</literal>
4663 * is returned to the remote caller.
4665 * Additionally, if the remote caller attempts to invoke methods or
4666 * access properties not mentioned in @interface_info the
4667 * <literal>org.freedesktop.DBus.Error.UnknownMethod</literal> resp.
4668 * <literal>org.freedesktop.DBus.Error.InvalidArgs</literal> errors
4669 * are returned to the caller.
4671 * It is considered a programming error if the
4672 * #GDBusInterfaceGetPropertyFunc function in @vtable returns a
4673 * #GVariant of incorrect type.
4675 * If an existing callback is already registered at @object_path and
4676 * @interface_name, then @error is set to #G_IO_ERROR_EXISTS.
4678 * GDBus automatically implements the standard D-Bus interfaces
4679 * org.freedesktop.DBus.Properties, org.freedesktop.DBus.Introspectable
4680 * and org.freedesktop.Peer, so you don't have to implement those for
4681 * the objects you export. You <emphasis>can</emphasis> implement
4682 * org.freedesktop.DBus.Properties yourself, e.g. to handle getting
4683 * and setting of properties asynchronously.
4685 * Note that the reference count on @interface_info will be
4686 * incremented by 1 (unless allocated statically, e.g. if the
4687 * reference count is -1, see g_dbus_interface_info_ref()) for as long
4688 * as the object is exported. Also note that @vtable will be copied.
4690 * See <xref linkend="gdbus-server"/> for an example of how to use this method.
4692 * Returns: 0 if @error is set, otherwise a registration id (never 0)
4693 * that can be used with g_dbus_connection_unregister_object() .
4698 g_dbus_connection_register_object (GDBusConnection *connection,
4699 const gchar *object_path,
4700 GDBusInterfaceInfo *interface_info,
4701 const GDBusInterfaceVTable *vtable,
4703 GDestroyNotify user_data_free_func,
4707 ExportedInterface *ei;
4710 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
4711 g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), 0);
4712 g_return_val_if_fail (interface_info != NULL, 0);
4713 g_return_val_if_fail (g_dbus_is_interface_name (interface_info->name), 0);
4714 g_return_val_if_fail (error == NULL || *error == NULL, 0);
4718 CONNECTION_LOCK (connection);
4720 eo = g_hash_table_lookup (connection->map_object_path_to_eo, object_path);
4723 eo = g_new0 (ExportedObject, 1);
4724 eo->object_path = g_strdup (object_path);
4725 eo->connection = connection;
4726 eo->map_if_name_to_ei = g_hash_table_new_full (g_str_hash,
4729 (GDestroyNotify) exported_interface_free);
4730 g_hash_table_insert (connection->map_object_path_to_eo, eo->object_path, eo);
4733 ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_info->name);
4739 _("An object is already exported for the interface %s at %s"),
4740 interface_info->name,
4745 ei = g_new0 (ExportedInterface, 1);
4746 ei->id = _global_registration_id++; /* TODO: overflow etc. */
4748 ei->user_data = user_data;
4749 ei->user_data_free_func = user_data_free_func;
4750 ei->vtable = _g_dbus_interface_vtable_copy (vtable);
4751 ei->interface_info = g_dbus_interface_info_ref (interface_info);
4752 g_dbus_interface_info_cache_build (ei->interface_info);
4753 ei->interface_name = g_strdup (interface_info->name);
4754 ei->context = g_main_context_get_thread_default ();
4755 if (ei->context != NULL)
4756 g_main_context_ref (ei->context);
4758 g_hash_table_insert (eo->map_if_name_to_ei,
4759 (gpointer) ei->interface_name,
4761 g_hash_table_insert (connection->map_id_to_ei,
4762 GUINT_TO_POINTER (ei->id),
4768 CONNECTION_UNLOCK (connection);
4774 * g_dbus_connection_unregister_object:
4775 * @connection: A #GDBusConnection.
4776 * @registration_id: A registration id obtained from g_dbus_connection_register_object().
4778 * Unregisters an object.
4780 * Returns: %TRUE if the object was unregistered, %FALSE otherwise.
4785 g_dbus_connection_unregister_object (GDBusConnection *connection,
4786 guint registration_id)
4788 ExportedInterface *ei;
4792 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
4796 CONNECTION_LOCK (connection);
4798 ei = g_hash_table_lookup (connection->map_id_to_ei,
4799 GUINT_TO_POINTER (registration_id));
4805 g_warn_if_fail (g_hash_table_remove (connection->map_id_to_ei, GUINT_TO_POINTER (ei->id)));
4806 g_warn_if_fail (g_hash_table_remove (eo->map_if_name_to_ei, ei->interface_name));
4807 /* unregister object path if we have no more exported interfaces */
4808 if (g_hash_table_size (eo->map_if_name_to_ei) == 0)
4809 g_warn_if_fail (g_hash_table_remove (connection->map_object_path_to_eo,
4815 CONNECTION_UNLOCK (connection);
4820 /* ---------------------------------------------------------------------------------------------------- */
4823 * g_dbus_connection_emit_signal:
4824 * @connection: A #GDBusConnection.
4825 * @destination_bus_name: (allow-none): The unique bus name for the destination
4826 * for the signal or %NULL to emit to all listeners.
4827 * @object_path: Path of remote object.
4828 * @interface_name: D-Bus interface to emit a signal on.
4829 * @signal_name: The name of the signal to emit.
4830 * @parameters: (allow-none): A #GVariant tuple with parameters for the signal
4831 * or %NULL if not passing parameters.
4832 * @error: Return location for error or %NULL.
4836 * If the parameters GVariant is floating, it is consumed.
4838 * This can only fail if @parameters is not compatible with the D-Bus protocol.
4840 * Returns: %TRUE unless @error is set.
4845 g_dbus_connection_emit_signal (GDBusConnection *connection,
4846 const gchar *destination_bus_name,
4847 const gchar *object_path,
4848 const gchar *interface_name,
4849 const gchar *signal_name,
4850 GVariant *parameters,
4853 GDBusMessage *message;
4859 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
4860 g_return_val_if_fail (destination_bus_name == NULL || g_dbus_is_name (destination_bus_name), FALSE);
4861 g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), FALSE);
4862 g_return_val_if_fail (interface_name != NULL && g_dbus_is_interface_name (interface_name), FALSE);
4863 g_return_val_if_fail (signal_name != NULL && g_dbus_is_member_name (signal_name), FALSE);
4864 g_return_val_if_fail (parameters == NULL || g_variant_is_of_type (parameters, G_VARIANT_TYPE_TUPLE), FALSE);
4866 if (G_UNLIKELY (_g_dbus_debug_emission ()))
4868 _g_dbus_debug_print_lock ();
4869 g_print ("========================================================================\n"
4870 "GDBus-debug:Emission:\n"
4871 " >>>> SIGNAL EMISSION %s.%s()\n"
4873 " destination %s\n",
4874 interface_name, signal_name,
4876 destination_bus_name != NULL ? destination_bus_name : "(none)");
4877 _g_dbus_debug_print_unlock ();
4880 message = g_dbus_message_new_signal (object_path,
4884 if (destination_bus_name != NULL)
4885 g_dbus_message_set_header (message,
4886 G_DBUS_MESSAGE_HEADER_FIELD_DESTINATION,
4887 g_variant_new_string (destination_bus_name));
4889 if (parameters != NULL)
4890 g_dbus_message_set_body (message, parameters);
4892 ret = g_dbus_connection_send_message (connection, message, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, error);
4893 g_object_unref (message);
4899 add_call_flags (GDBusMessage *message,
4900 GDBusCallFlags flags)
4902 if (flags & G_DBUS_CALL_FLAGS_NO_AUTO_START)
4903 g_dbus_message_set_flags (message, G_DBUS_MESSAGE_FLAGS_NO_AUTO_START);
4907 decode_method_reply (GDBusMessage *reply,
4908 const gchar *method_name,
4909 const GVariantType *reply_type,
4915 switch (g_dbus_message_get_message_type (reply))
4917 case G_DBUS_MESSAGE_TYPE_METHOD_RETURN:
4918 result = g_dbus_message_get_body (reply);
4921 result = g_variant_new ("()");
4922 g_variant_ref_sink (result);
4926 g_variant_ref (result);
4929 if (!g_variant_is_of_type (result, reply_type))
4931 gchar *type_string = g_variant_type_dup_string (reply_type);
4935 G_IO_ERROR_INVALID_ARGUMENT,
4936 _("Method `%s' returned type `%s', but expected `%s'"),
4937 method_name, g_variant_get_type_string (result), type_string);
4939 g_variant_unref (result);
4940 g_free (type_string);
4945 case G_DBUS_MESSAGE_TYPE_ERROR:
4946 g_dbus_message_to_gerror (reply, error);
4950 g_assert_not_reached ();
4960 GSimpleAsyncResult *simple;
4961 GVariantType *reply_type;
4962 gchar *method_name; /* for error message */
4967 g_dbus_connection_call_done (GObject *source,
4968 GAsyncResult *result,
4971 GDBusConnection *connection = G_DBUS_CONNECTION (source);
4972 CallState *state = user_data;
4974 GDBusMessage *reply;
4978 reply = g_dbus_connection_send_message_with_reply_finish (connection,
4982 if (G_UNLIKELY (_g_dbus_debug_call ()))
4984 _g_dbus_debug_print_lock ();
4985 g_print ("========================================================================\n"
4986 "GDBus-debug:Call:\n"
4987 " <<<< ASYNC COMPLETE %s() (serial %d)\n"
4993 g_print ("SUCCESS\n");
4997 g_print ("FAILED: %s\n",
5000 _g_dbus_debug_print_unlock ();
5006 value = decode_method_reply (reply, state->method_name,
5007 state->reply_type, &error);
5008 g_object_unref (reply);
5014 g_simple_async_result_take_error (state->simple, error);
5016 g_simple_async_result_set_op_res_gpointer (state->simple, value,
5017 (GDestroyNotify) g_variant_unref);
5019 g_simple_async_result_complete (state->simple);
5020 g_variant_type_free (state->reply_type);
5021 g_object_unref (state->simple);
5022 g_free (state->method_name);
5024 g_slice_free (CallState, state);
5028 * g_dbus_connection_call:
5029 * @connection: A #GDBusConnection.
5030 * @bus_name: (allow-none): A unique or well-known bus name or %NULL if
5031 * @connection is not a message bus connection.
5032 * @object_path: Path of remote object.
5033 * @interface_name: D-Bus interface to invoke method on.
5034 * @method_name: The name of the method to invoke.
5035 * @parameters: (allow-none): A #GVariant tuple with parameters for the method
5036 * or %NULL if not passing parameters.
5037 * @reply_type: (allow-none): The expected type of the reply, or %NULL.
5038 * @flags: Flags from the #GDBusCallFlags enumeration.
5039 * @timeout_msec: The timeout in milliseconds, -1 to use the default
5040 * timeout or %G_MAXINT for no timeout.
5041 * @cancellable: A #GCancellable or %NULL.
5042 * @callback: (allow-none): A #GAsyncReadyCallback to call when the request is
5043 * satisfied or %NULL if you don't * care about the result of the
5044 * method invocation.
5045 * @user_data: The data to pass to @callback.
5047 * Asynchronously invokes the @method_name method on the
5048 * @interface_name D-Bus interface on the remote object at
5049 * @object_path owned by @bus_name.
5051 * If @connection is closed then the operation will fail with
5052 * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the operation will
5053 * fail with %G_IO_ERROR_CANCELLED. If @parameters contains a value
5054 * not compatible with the D-Bus protocol, the operation fails with
5055 * %G_IO_ERROR_INVALID_ARGUMENT.
5057 * If @reply_type is non-%NULL then the reply will be checked for having this type and an
5058 * error will be raised if it does not match. Said another way, if you give a @reply_type
5059 * then any non-%NULL return value will be of this type.
5061 * If the @parameters #GVariant is floating, it is consumed. This allows
5062 * convenient 'inline' use of g_variant_new(), e.g.:
5064 * g_dbus_connection_call (connection,
5065 * "org.freedesktop.StringThings",
5066 * "/org/freedesktop/StringThings",
5067 * "org.freedesktop.StringThings",
5069 * g_variant_new ("(ss)",
5073 * G_DBUS_CALL_FLAGS_NONE,
5076 * (GAsyncReadyCallback) two_strings_done,
5080 * This is an asynchronous method. When the operation is finished, @callback will be invoked
5081 * in the <link linkend="g-main-context-push-thread-default">thread-default main loop</link>
5082 * of the thread you are calling this method from. You can then call
5083 * g_dbus_connection_call_finish() to get the result of the operation.
5084 * See g_dbus_connection_call_sync() for the synchronous version of this
5090 g_dbus_connection_call (GDBusConnection *connection,
5091 const gchar *bus_name,
5092 const gchar *object_path,
5093 const gchar *interface_name,
5094 const gchar *method_name,
5095 GVariant *parameters,
5096 const GVariantType *reply_type,
5097 GDBusCallFlags flags,
5099 GCancellable *cancellable,
5100 GAsyncReadyCallback callback,
5103 GDBusMessage *message;
5106 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
5107 g_return_if_fail (bus_name == NULL || g_dbus_is_name (bus_name));
5108 g_return_if_fail (object_path != NULL && g_variant_is_object_path (object_path));
5109 g_return_if_fail (interface_name != NULL && g_dbus_is_interface_name (interface_name));
5110 g_return_if_fail (method_name != NULL && g_dbus_is_member_name (method_name));
5111 g_return_if_fail (timeout_msec >= 0 || timeout_msec == -1);
5112 g_return_if_fail ((parameters == NULL) || g_variant_is_of_type (parameters, G_VARIANT_TYPE_TUPLE));
5114 state = g_slice_new (CallState);
5115 state->simple = g_simple_async_result_new (G_OBJECT (connection),
5116 callback, user_data,
5117 g_dbus_connection_call);
5118 state->method_name = g_strjoin (".", interface_name, method_name, NULL);
5120 if (reply_type == NULL)
5121 reply_type = G_VARIANT_TYPE_ANY;
5123 state->reply_type = g_variant_type_copy (reply_type);
5125 message = g_dbus_message_new_method_call (bus_name,
5129 add_call_flags (message, flags);
5130 if (parameters != NULL)
5131 g_dbus_message_set_body (message, parameters);
5133 g_dbus_connection_send_message_with_reply (connection,
5135 G_DBUS_SEND_MESSAGE_FLAGS_NONE,
5139 g_dbus_connection_call_done,
5142 if (G_UNLIKELY (_g_dbus_debug_call ()))
5144 _g_dbus_debug_print_lock ();
5145 g_print ("========================================================================\n"
5146 "GDBus-debug:Call:\n"
5147 " >>>> ASYNC %s.%s()\n"
5149 " owned by name %s (serial %d)\n",
5153 bus_name != NULL ? bus_name : "(none)",
5155 _g_dbus_debug_print_unlock ();
5158 if (message != NULL)
5159 g_object_unref (message);
5163 * g_dbus_connection_call_finish:
5164 * @connection: A #GDBusConnection.
5165 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_call().
5166 * @error: Return location for error or %NULL.
5168 * Finishes an operation started with g_dbus_connection_call().
5170 * Returns: %NULL if @error is set. Otherwise a #GVariant tuple with
5171 * return values. Free with g_variant_unref().
5176 g_dbus_connection_call_finish (GDBusConnection *connection,
5180 GSimpleAsyncResult *simple;
5182 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
5183 g_return_val_if_fail (g_simple_async_result_is_valid (res, G_OBJECT (connection),
5184 g_dbus_connection_call), NULL);
5185 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
5187 simple = G_SIMPLE_ASYNC_RESULT (res);
5189 if (g_simple_async_result_propagate_error (simple, error))
5192 return g_variant_ref (g_simple_async_result_get_op_res_gpointer (simple));
5195 /* ---------------------------------------------------------------------------------------------------- */
5198 * g_dbus_connection_call_sync:
5199 * @connection: A #GDBusConnection.
5200 * @bus_name: A unique or well-known bus name.
5201 * @object_path: Path of remote object.
5202 * @interface_name: D-Bus interface to invoke method on.
5203 * @method_name: The name of the method to invoke.
5204 * @parameters: (allow-none): A #GVariant tuple with parameters for the method
5205 * or %NULL if not passing parameters.
5206 * @reply_type: (allow-none): The expected type of the reply, or %NULL.
5207 * @flags: Flags from the #GDBusCallFlags enumeration.
5208 * @timeout_msec: The timeout in milliseconds, -1 to use the default
5209 * timeout or %G_MAXINT for no timeout.
5210 * @cancellable: A #GCancellable or %NULL.
5211 * @error: Return location for error or %NULL.
5213 * Synchronously invokes the @method_name method on the
5214 * @interface_name D-Bus interface on the remote object at
5215 * @object_path owned by @bus_name.
5217 * If @connection is closed then the operation will fail with
5218 * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the
5219 * operation will fail with %G_IO_ERROR_CANCELLED. If @parameters
5220 * contains a value not compatible with the D-Bus protocol, the operation
5221 * fails with %G_IO_ERROR_INVALID_ARGUMENT.
5223 * If @reply_type is non-%NULL then the reply will be checked for having
5224 * this type and an error will be raised if it does not match. Said
5225 * another way, if you give a @reply_type then any non-%NULL return
5226 * value will be of this type.
5228 * If the @parameters #GVariant is floating, it is consumed.
5229 * This allows convenient 'inline' use of g_variant_new(), e.g.:
5231 * g_dbus_connection_call_sync (connection,
5232 * "org.freedesktop.StringThings",
5233 * "/org/freedesktop/StringThings",
5234 * "org.freedesktop.StringThings",
5236 * g_variant_new ("(ss)",
5240 * G_DBUS_CALL_FLAGS_NONE,
5246 * The calling thread is blocked until a reply is received. See
5247 * g_dbus_connection_call() for the asynchronous version of
5250 * Returns: %NULL if @error is set. Otherwise a #GVariant tuple with
5251 * return values. Free with g_variant_unref().
5256 g_dbus_connection_call_sync (GDBusConnection *connection,
5257 const gchar *bus_name,
5258 const gchar *object_path,
5259 const gchar *interface_name,
5260 const gchar *method_name,
5261 GVariant *parameters,
5262 const GVariantType *reply_type,
5263 GDBusCallFlags flags,
5265 GCancellable *cancellable,
5268 GDBusMessage *message;
5269 GDBusMessage *reply;
5271 GError *local_error;
5277 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
5278 g_return_val_if_fail (bus_name == NULL || g_dbus_is_name (bus_name), NULL);
5279 g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), NULL);
5280 g_return_val_if_fail (interface_name != NULL && g_dbus_is_interface_name (interface_name), NULL);
5281 g_return_val_if_fail (method_name != NULL && g_dbus_is_member_name (method_name), NULL);
5282 g_return_val_if_fail (timeout_msec >= 0 || timeout_msec == -1, NULL);
5283 g_return_val_if_fail ((parameters == NULL) || g_variant_is_of_type (parameters, G_VARIANT_TYPE_TUPLE), NULL);
5285 if (reply_type == NULL)
5286 reply_type = G_VARIANT_TYPE_ANY;
5288 message = g_dbus_message_new_method_call (bus_name,
5292 add_call_flags (message, flags);
5293 if (parameters != NULL)
5294 g_dbus_message_set_body (message, parameters);
5296 if (G_UNLIKELY (_g_dbus_debug_call ()))
5298 _g_dbus_debug_print_lock ();
5299 g_print ("========================================================================\n"
5300 "GDBus-debug:Call:\n"
5301 " >>>> SYNC %s.%s()\n"
5303 " owned by name %s\n",
5307 bus_name != NULL ? bus_name : "(none)");
5308 _g_dbus_debug_print_unlock ();
5312 reply = g_dbus_connection_send_message_with_reply_sync (connection,
5314 G_DBUS_SEND_MESSAGE_FLAGS_NONE,
5316 NULL, /* volatile guint32 *out_serial */
5320 if (G_UNLIKELY (_g_dbus_debug_call ()))
5322 _g_dbus_debug_print_lock ();
5323 g_print ("========================================================================\n"
5324 "GDBus-debug:Call:\n"
5325 " <<<< SYNC COMPLETE %s.%s()\n"
5331 g_print ("SUCCESS\n");
5335 g_print ("FAILED: %s\n",
5336 local_error->message);
5338 _g_dbus_debug_print_unlock ();
5344 *error = local_error;
5346 g_error_free (local_error);
5350 result = decode_method_reply (reply, method_name, reply_type, error);
5353 if (message != NULL)
5354 g_object_unref (message);
5356 g_object_unref (reply);
5361 /* ---------------------------------------------------------------------------------------------------- */
5363 struct ExportedSubtree
5367 GDBusConnection *connection;
5368 GDBusSubtreeVTable *vtable;
5369 GDBusSubtreeFlags flags;
5371 GMainContext *context;
5373 GDestroyNotify user_data_free_func;
5377 exported_subtree_free (ExportedSubtree *es)
5379 call_destroy_notify (es->context,
5380 es->user_data_free_func,
5383 if (es->context != NULL)
5384 g_main_context_unref (es->context);
5386 _g_dbus_subtree_vtable_free (es->vtable);
5387 g_free (es->object_path);
5391 /* called without lock held */
5393 handle_subtree_introspect (GDBusConnection *connection,
5394 ExportedSubtree *es,
5395 GDBusMessage *message)
5399 GDBusMessage *reply;
5402 const gchar *sender;
5403 const gchar *requested_object_path;
5404 const gchar *requested_node;
5405 GDBusInterfaceInfo **interfaces;
5407 gchar **subnode_paths;
5408 gboolean has_properties_interface;
5409 gboolean has_introspectable_interface;
5413 requested_object_path = g_dbus_message_get_path (message);
5414 sender = g_dbus_message_get_sender (message);
5415 is_root = (g_strcmp0 (requested_object_path, es->object_path) == 0);
5417 s = g_string_new (NULL);
5418 introspect_append_header (s);
5420 /* Strictly we don't need the children in dynamic mode, but we avoid the
5421 * conditionals to preserve code clarity
5423 children = es->vtable->enumerate (es->connection,
5430 requested_node = strrchr (requested_object_path, '/') + 1;
5432 /* Assert existence of object if we are not dynamic */
5433 if (!(es->flags & G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES) &&
5434 !_g_strv_has_string ((const gchar * const *) children, requested_node))
5439 requested_node = NULL;
5442 interfaces = es->vtable->introspect (es->connection,
5447 if (interfaces != NULL)
5449 has_properties_interface = FALSE;
5450 has_introspectable_interface = FALSE;
5452 for (n = 0; interfaces[n] != NULL; n++)
5454 if (strcmp (interfaces[n]->name, "org.freedesktop.DBus.Properties") == 0)
5455 has_properties_interface = TRUE;
5456 else if (strcmp (interfaces[n]->name, "org.freedesktop.DBus.Introspectable") == 0)
5457 has_introspectable_interface = TRUE;
5459 if (!has_properties_interface)
5460 g_string_append (s, introspect_properties_interface);
5461 if (!has_introspectable_interface)
5462 g_string_append (s, introspect_introspectable_interface);
5464 for (n = 0; interfaces[n] != NULL; n++)
5466 g_dbus_interface_info_generate_xml (interfaces[n], 2, s);
5467 g_dbus_interface_info_unref (interfaces[n]);
5469 g_free (interfaces);
5472 /* then include <node> entries from the Subtree for the root */
5475 for (n = 0; children != NULL && children[n] != NULL; n++)
5476 g_string_append_printf (s, " <node name=\"%s\"/>\n", children[n]);
5479 /* finally include nodes registered below us */
5480 subnode_paths = g_dbus_connection_list_registered (es->connection, requested_object_path);
5481 for (n = 0; subnode_paths != NULL && subnode_paths[n] != NULL; n++)
5482 g_string_append_printf (s, " <node name=\"%s\"/>\n", subnode_paths[n]);
5483 g_strfreev (subnode_paths);
5485 g_string_append (s, "</node>\n");
5487 reply = g_dbus_message_new_method_reply (message);
5488 g_dbus_message_set_body (reply, g_variant_new ("(s)", s->str));
5489 g_dbus_connection_send_message (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
5490 g_object_unref (reply);
5495 g_string_free (s, TRUE);
5496 g_strfreev (children);
5500 /* called without lock held */
5502 handle_subtree_method_invocation (GDBusConnection *connection,
5503 ExportedSubtree *es,
5504 GDBusMessage *message)
5507 const gchar *sender;
5508 const gchar *interface_name;
5509 const gchar *member;
5510 const gchar *signature;
5511 const gchar *requested_object_path;
5512 const gchar *requested_node;
5514 GDBusInterfaceInfo *interface_info;
5515 const GDBusInterfaceVTable *interface_vtable;
5516 gpointer interface_user_data;
5518 GDBusInterfaceInfo **interfaces;
5519 gboolean is_property_get;
5520 gboolean is_property_set;
5521 gboolean is_property_get_all;
5526 requested_object_path = g_dbus_message_get_path (message);
5527 sender = g_dbus_message_get_sender (message);
5528 interface_name = g_dbus_message_get_interface (message);
5529 member = g_dbus_message_get_member (message);
5530 signature = g_dbus_message_get_signature (message);
5531 is_root = (g_strcmp0 (requested_object_path, es->object_path) == 0);
5533 is_property_get = FALSE;
5534 is_property_set = FALSE;
5535 is_property_get_all = FALSE;
5536 if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0)
5538 if (g_strcmp0 (member, "Get") == 0 && g_strcmp0 (signature, "ss") == 0)
5539 is_property_get = TRUE;
5540 else if (g_strcmp0 (member, "Set") == 0 && g_strcmp0 (signature, "ssv") == 0)
5541 is_property_set = TRUE;
5542 else if (g_strcmp0 (member, "GetAll") == 0 && g_strcmp0 (signature, "s") == 0)
5543 is_property_get_all = TRUE;
5548 requested_node = strrchr (requested_object_path, '/') + 1;
5550 if (~es->flags & G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES)
5552 /* We don't want to dispatch to unenumerated
5553 * nodes, so ensure that the child exists.
5558 children = es->vtable->enumerate (es->connection,
5563 exists = _g_strv_has_string ((const gchar * const *) children, requested_node);
5564 g_strfreev (children);
5572 requested_node = NULL;
5575 /* get introspection data for the node */
5576 interfaces = es->vtable->introspect (es->connection,
5578 requested_object_path,
5582 if (interfaces == NULL)
5585 interface_info = NULL;
5586 for (n = 0; interfaces[n] != NULL; n++)
5588 if (g_strcmp0 (interfaces[n]->name, interface_name) == 0)
5589 interface_info = interfaces[n];
5592 /* dispatch the call if the user wants to handle it */
5593 if (interface_info != NULL)
5595 /* figure out where to dispatch the method call */
5596 interface_user_data = NULL;
5597 interface_vtable = es->vtable->dispatch (es->connection,
5602 &interface_user_data,
5604 if (interface_vtable == NULL)
5607 CONNECTION_LOCK (connection);
5608 handled = validate_and_maybe_schedule_method_call (es->connection,
5615 interface_user_data);
5616 CONNECTION_UNLOCK (connection);
5618 /* handle org.freedesktop.DBus.Properties interface if not explicitly handled */
5619 else if (is_property_get || is_property_set || is_property_get_all)
5621 if (is_property_get)
5622 g_variant_get (g_dbus_message_get_body (message), "(&s&s)", &interface_name, NULL);
5623 else if (is_property_set)
5624 g_variant_get (g_dbus_message_get_body (message), "(&s&sv)", &interface_name, NULL, NULL);
5625 else if (is_property_get_all)
5626 g_variant_get (g_dbus_message_get_body (message), "(&s)", &interface_name, NULL, NULL);
5628 g_assert_not_reached ();
5630 /* see if the object supports this interface at all */
5631 for (n = 0; interfaces[n] != NULL; n++)
5633 if (g_strcmp0 (interfaces[n]->name, interface_name) == 0)
5634 interface_info = interfaces[n];
5637 /* Fail with org.freedesktop.DBus.Error.InvalidArgs if the user-code
5638 * claims it won't support the interface
5640 if (interface_info == NULL)
5642 GDBusMessage *reply;
5643 reply = g_dbus_message_new_method_error (message,
5644 "org.freedesktop.DBus.Error.InvalidArgs",
5645 _("No such interface `%s'"),
5647 g_dbus_connection_send_message (es->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
5648 g_object_unref (reply);
5653 /* figure out where to dispatch the property get/set/getall calls */
5654 interface_user_data = NULL;
5655 interface_vtable = es->vtable->dispatch (es->connection,
5660 &interface_user_data,
5662 if (interface_vtable == NULL)
5664 g_warning ("The subtree introspection function indicates that '%s' "
5665 "is a valid interface name, but calling the dispatch "
5666 "function on that interface gave us NULL", interface_name);
5670 if (is_property_get || is_property_set)
5672 CONNECTION_LOCK (connection);
5673 handled = validate_and_maybe_schedule_property_getset (es->connection,
5681 interface_user_data);
5682 CONNECTION_UNLOCK (connection);
5684 else if (is_property_get_all)
5686 CONNECTION_LOCK (connection);
5687 handled = validate_and_maybe_schedule_property_get_all (es->connection,
5694 interface_user_data);
5695 CONNECTION_UNLOCK (connection);
5700 if (interfaces != NULL)
5702 for (n = 0; interfaces[n] != NULL; n++)
5703 g_dbus_interface_info_unref (interfaces[n]);
5704 g_free (interfaces);
5712 GDBusMessage *message;
5713 ExportedSubtree *es;
5714 } SubtreeDeferredData;
5717 subtree_deferred_data_free (SubtreeDeferredData *data)
5719 g_object_unref (data->message);
5723 /* called without lock held in the thread where the caller registered the subtree */
5725 process_subtree_vtable_message_in_idle_cb (gpointer _data)
5727 SubtreeDeferredData *data = _data;
5732 if (g_strcmp0 (g_dbus_message_get_interface (data->message), "org.freedesktop.DBus.Introspectable") == 0 &&
5733 g_strcmp0 (g_dbus_message_get_member (data->message), "Introspect") == 0 &&
5734 g_strcmp0 (g_dbus_message_get_signature (data->message), "") == 0)
5735 handled = handle_subtree_introspect (data->es->connection,
5739 handled = handle_subtree_method_invocation (data->es->connection,
5745 CONNECTION_LOCK (data->es->connection);
5746 handled = handle_generic_unlocked (data->es->connection, data->message);
5747 CONNECTION_UNLOCK (data->es->connection);
5750 /* if we couldn't handle the request, just bail with the UnknownMethod error */
5753 GDBusMessage *reply;
5754 reply = g_dbus_message_new_method_error (data->message,
5755 "org.freedesktop.DBus.Error.UnknownMethod",
5756 _("Method `%s' on interface `%s' with signature `%s' does not exist"),
5757 g_dbus_message_get_member (data->message),
5758 g_dbus_message_get_interface (data->message),
5759 g_dbus_message_get_signature (data->message));
5760 g_dbus_connection_send_message (data->es->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
5761 g_object_unref (reply);
5767 /* called in message handler thread with lock held */
5769 subtree_message_func (GDBusConnection *connection,
5770 ExportedSubtree *es,
5771 GDBusMessage *message)
5773 GSource *idle_source;
5774 SubtreeDeferredData *data;
5776 data = g_new0 (SubtreeDeferredData, 1);
5777 data->message = g_object_ref (message);
5780 /* defer this call to an idle handler in the right thread */
5781 idle_source = g_idle_source_new ();
5782 g_source_set_priority (idle_source, G_PRIORITY_HIGH);
5783 g_source_set_callback (idle_source,
5784 process_subtree_vtable_message_in_idle_cb,
5786 (GDestroyNotify) subtree_deferred_data_free);
5787 g_source_attach (idle_source, es->context);
5788 g_source_unref (idle_source);
5790 /* since we own the entire subtree, handlers for objects not in the subtree have been
5791 * tried already by libdbus-1 - so we just need to ensure that we're always going
5792 * to reply to the message
5798 * g_dbus_connection_register_subtree:
5799 * @connection: A #GDBusConnection.
5800 * @object_path: The object path to register the subtree at.
5801 * @vtable: A #GDBusSubtreeVTable to enumerate, introspect and dispatch nodes in the subtree.
5802 * @flags: Flags used to fine tune the behavior of the subtree.
5803 * @user_data: Data to pass to functions in @vtable.
5804 * @user_data_free_func: Function to call when the subtree is unregistered.
5805 * @error: Return location for error or %NULL.
5807 * Registers a whole subtree of <quote>dynamic</quote> objects.
5809 * The @enumerate and @introspection functions in @vtable are used to
5810 * convey, to remote callers, what nodes exist in the subtree rooted
5813 * When handling remote calls into any node in the subtree, first the
5814 * @enumerate function is used to check if the node exists. If the node exists
5815 * or the #G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES flag is set
5816 * the @introspection function is used to check if the node supports the
5817 * requested method. If so, the @dispatch function is used to determine
5818 * where to dispatch the call. The collected #GDBusInterfaceVTable and
5819 * #gpointer will be used to call into the interface vtable for processing
5822 * All calls into user-provided code will be invoked in the <link
5823 * linkend="g-main-context-push-thread-default">thread-default main
5824 * loop</link> of the thread you are calling this method from.
5826 * If an existing subtree is already registered at @object_path or
5827 * then @error is set to #G_IO_ERROR_EXISTS.
5829 * Note that it is valid to register regular objects (using
5830 * g_dbus_connection_register_object()) in a subtree registered with
5831 * g_dbus_connection_register_subtree() - if so, the subtree handler
5832 * is tried as the last resort. One way to think about a subtree
5833 * handler is to consider it a <quote>fallback handler</quote>
5834 * for object paths not registered via g_dbus_connection_register_object()
5835 * or other bindings.
5837 * Note that @vtable will be copied so you cannot change it after
5840 * See <xref linkend="gdbus-subtree-server"/> for an example of how to use this method.
5842 * Returns: 0 if @error is set, otherwise a subtree registration id (never 0)
5843 * that can be used with g_dbus_connection_unregister_subtree() .
5848 g_dbus_connection_register_subtree (GDBusConnection *connection,
5849 const gchar *object_path,
5850 const GDBusSubtreeVTable *vtable,
5851 GDBusSubtreeFlags flags,
5853 GDestroyNotify user_data_free_func,
5857 ExportedSubtree *es;
5859 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
5860 g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), 0);
5861 g_return_val_if_fail (vtable != NULL, 0);
5862 g_return_val_if_fail (error == NULL || *error == NULL, 0);
5866 CONNECTION_LOCK (connection);
5868 es = g_hash_table_lookup (connection->map_object_path_to_es, object_path);
5874 _("A subtree is already exported for %s"),
5879 es = g_new0 (ExportedSubtree, 1);
5880 es->object_path = g_strdup (object_path);
5881 es->connection = connection;
5883 es->vtable = _g_dbus_subtree_vtable_copy (vtable);
5885 es->id = _global_subtree_registration_id++; /* TODO: overflow etc. */
5886 es->user_data = user_data;
5887 es->user_data_free_func = user_data_free_func;
5888 es->context = g_main_context_get_thread_default ();
5889 if (es->context != NULL)
5890 g_main_context_ref (es->context);
5892 g_hash_table_insert (connection->map_object_path_to_es, es->object_path, es);
5893 g_hash_table_insert (connection->map_id_to_es,
5894 GUINT_TO_POINTER (es->id),
5900 CONNECTION_UNLOCK (connection);
5905 /* ---------------------------------------------------------------------------------------------------- */
5908 * g_dbus_connection_unregister_subtree:
5909 * @connection: A #GDBusConnection.
5910 * @registration_id: A subtree registration id obtained from g_dbus_connection_register_subtree().
5912 * Unregisters a subtree.
5914 * Returns: %TRUE if the subtree was unregistered, %FALSE otherwise.
5919 g_dbus_connection_unregister_subtree (GDBusConnection *connection,
5920 guint registration_id)
5922 ExportedSubtree *es;
5925 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
5929 CONNECTION_LOCK (connection);
5931 es = g_hash_table_lookup (connection->map_id_to_es,
5932 GUINT_TO_POINTER (registration_id));
5936 g_warn_if_fail (g_hash_table_remove (connection->map_id_to_es, GUINT_TO_POINTER (es->id)));
5937 g_warn_if_fail (g_hash_table_remove (connection->map_object_path_to_es, es->object_path));
5942 CONNECTION_UNLOCK (connection);
5947 /* ---------------------------------------------------------------------------------------------------- */
5949 /* must be called with lock held */
5951 handle_generic_ping_unlocked (GDBusConnection *connection,
5952 const gchar *object_path,
5953 GDBusMessage *message)
5955 GDBusMessage *reply;
5956 reply = g_dbus_message_new_method_reply (message);
5957 g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
5958 g_object_unref (reply);
5961 /* must be called with lock held */
5963 handle_generic_get_machine_id_unlocked (GDBusConnection *connection,
5964 const gchar *object_path,
5965 GDBusMessage *message)
5967 GDBusMessage *reply;
5970 if (connection->machine_id == NULL)
5975 connection->machine_id = _g_dbus_get_machine_id (&error);
5976 if (connection->machine_id == NULL)
5978 reply = g_dbus_message_new_method_error_literal (message,
5979 "org.freedesktop.DBus.Error.Failed",
5981 g_error_free (error);
5987 reply = g_dbus_message_new_method_reply (message);
5988 g_dbus_message_set_body (reply, g_variant_new ("(s)", connection->machine_id));
5990 g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
5991 g_object_unref (reply);
5994 /* must be called with lock held */
5996 handle_generic_introspect_unlocked (GDBusConnection *connection,
5997 const gchar *object_path,
5998 GDBusMessage *message)
6003 GDBusMessage *reply;
6005 /* first the header */
6006 s = g_string_new (NULL);
6007 introspect_append_header (s);
6009 registered = g_dbus_connection_list_registered_unlocked (connection, object_path);
6010 for (n = 0; registered != NULL && registered[n] != NULL; n++)
6011 g_string_append_printf (s, " <node name=\"%s\"/>\n", registered[n]);
6012 g_strfreev (registered);
6013 g_string_append (s, "</node>\n");
6015 reply = g_dbus_message_new_method_reply (message);
6016 g_dbus_message_set_body (reply, g_variant_new ("(s)", s->str));
6017 g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
6018 g_object_unref (reply);
6019 g_string_free (s, TRUE);
6022 /* must be called with lock held */
6024 handle_generic_unlocked (GDBusConnection *connection,
6025 GDBusMessage *message)
6028 const gchar *interface_name;
6029 const gchar *member;
6030 const gchar *signature;
6033 CONNECTION_ENSURE_LOCK (connection);
6037 interface_name = g_dbus_message_get_interface (message);
6038 member = g_dbus_message_get_member (message);
6039 signature = g_dbus_message_get_signature (message);
6040 path = g_dbus_message_get_path (message);
6042 if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Introspectable") == 0 &&
6043 g_strcmp0 (member, "Introspect") == 0 &&
6044 g_strcmp0 (signature, "") == 0)
6046 handle_generic_introspect_unlocked (connection, path, message);
6049 else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Peer") == 0 &&
6050 g_strcmp0 (member, "Ping") == 0 &&
6051 g_strcmp0 (signature, "") == 0)
6053 handle_generic_ping_unlocked (connection, path, message);
6056 else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Peer") == 0 &&
6057 g_strcmp0 (member, "GetMachineId") == 0 &&
6058 g_strcmp0 (signature, "") == 0)
6060 handle_generic_get_machine_id_unlocked (connection, path, message);
6067 /* ---------------------------------------------------------------------------------------------------- */
6069 /* called in message handler thread with lock held */
6071 distribute_method_call (GDBusConnection *connection,
6072 GDBusMessage *message)
6074 GDBusMessage *reply;
6076 ExportedSubtree *es;
6077 const gchar *object_path;
6078 const gchar *interface_name;
6079 const gchar *member;
6081 gchar *subtree_path;
6084 g_assert (g_dbus_message_get_message_type (message) == G_DBUS_MESSAGE_TYPE_METHOD_CALL);
6086 interface_name = g_dbus_message_get_interface (message);
6087 member = g_dbus_message_get_member (message);
6088 path = g_dbus_message_get_path (message);
6089 subtree_path = g_strdup (path);
6090 needle = strrchr (subtree_path, '/');
6091 if (needle != NULL && needle != subtree_path)
6097 g_free (subtree_path);
6098 subtree_path = NULL;
6102 if (G_UNLIKELY (_g_dbus_debug_incoming ()))
6104 _g_dbus_debug_print_lock ();
6105 g_print ("========================================================================\n"
6106 "GDBus-debug:Incoming:\n"
6107 " <<<< METHOD INVOCATION %s.%s()\n"
6109 " invoked by name %s\n"
6111 interface_name, member,
6113 g_dbus_message_get_sender (message) != NULL ? g_dbus_message_get_sender (message) : "(none)",
6114 g_dbus_message_get_serial (message));
6115 _g_dbus_debug_print_unlock ();
6118 object_path = g_dbus_message_get_path (message);
6119 g_assert (object_path != NULL);
6121 eo = g_hash_table_lookup (connection->map_object_path_to_eo, object_path);
6124 if (obj_message_func (connection, eo, message))
6128 es = g_hash_table_lookup (connection->map_object_path_to_es, object_path);
6131 if (subtree_message_func (connection, es, message))
6135 if (subtree_path != NULL)
6137 es = g_hash_table_lookup (connection->map_object_path_to_es, subtree_path);
6140 if (subtree_message_func (connection, es, message))
6145 if (handle_generic_unlocked (connection, message))
6148 /* if we end up here, the message has not been not handled - so return an error saying this */
6149 reply = g_dbus_message_new_method_error (message,
6150 "org.freedesktop.DBus.Error.UnknownMethod",
6151 _("No such interface `%s' on object at path %s"),
6154 g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
6155 g_object_unref (reply);
6158 g_free (subtree_path);
6161 /* ---------------------------------------------------------------------------------------------------- */
6163 static GDBusConnection **
6164 message_bus_get_singleton (GBusType bus_type,
6167 GDBusConnection **ret;
6168 const gchar *starter_bus;
6174 case G_BUS_TYPE_SESSION:
6175 ret = &the_session_bus;
6178 case G_BUS_TYPE_SYSTEM:
6179 ret = &the_system_bus;
6182 case G_BUS_TYPE_STARTER:
6183 starter_bus = g_getenv ("DBUS_STARTER_BUS_TYPE");
6184 if (g_strcmp0 (starter_bus, "session") == 0)
6186 ret = message_bus_get_singleton (G_BUS_TYPE_SESSION, error);
6189 else if (g_strcmp0 (starter_bus, "system") == 0)
6191 ret = message_bus_get_singleton (G_BUS_TYPE_SYSTEM, error);
6196 if (starter_bus != NULL)
6200 G_IO_ERROR_INVALID_ARGUMENT,
6201 _("Cannot determine bus address from DBUS_STARTER_BUS_TYPE environment variable"
6202 " - unknown value `%s'"),
6207 g_set_error_literal (error,
6209 G_IO_ERROR_INVALID_ARGUMENT,
6210 _("Cannot determine bus address because the DBUS_STARTER_BUS_TYPE environment "
6211 "variable is not set"));
6217 g_assert_not_reached ();
6225 static GDBusConnection *
6226 get_uninitialized_connection (GBusType bus_type,
6227 GCancellable *cancellable,
6230 GDBusConnection **singleton;
6231 GDBusConnection *ret;
6235 G_LOCK (message_bus_lock);
6236 singleton = message_bus_get_singleton (bus_type, error);
6237 if (singleton == NULL)
6240 if (*singleton == NULL)
6243 address = g_dbus_address_get_for_bus_sync (bus_type, cancellable, error);
6244 if (address == NULL)
6246 ret = *singleton = g_object_new (G_TYPE_DBUS_CONNECTION,
6248 "flags", G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT |
6249 G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION,
6250 "exit-on-close", TRUE,
6256 ret = g_object_ref (*singleton);
6259 g_assert (ret != NULL);
6262 G_UNLOCK (message_bus_lock);
6268 * @bus_type: A #GBusType.
6269 * @cancellable: A #GCancellable or %NULL.
6270 * @error: Return location for error or %NULL.
6272 * Synchronously connects to the message bus specified by @bus_type.
6273 * Note that the returned object may shared with other callers,
6274 * e.g. if two separate parts of a process calls this function with
6275 * the same @bus_type, they will share the same object.
6277 * This is a synchronous failable function. See g_bus_get() and
6278 * g_bus_get_finish() for the asynchronous version.
6280 * The returned object is a singleton, that is, shared with other
6281 * callers of g_bus_get() and g_bus_get_sync() for @bus_type. In the
6282 * event that you need a private message bus connection, use
6283 * g_dbus_address_get_for_bus_sync() and
6284 * g_dbus_connection_new_for_address().
6286 * Note that the returned #GDBusConnection object will (usually) have
6287 * the #GDBusConnection:exit-on-close property set to %TRUE.
6289 * Returns: (transfer full): A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
6294 g_bus_get_sync (GBusType bus_type,
6295 GCancellable *cancellable,
6298 GDBusConnection *connection;
6300 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
6302 connection = get_uninitialized_connection (bus_type, cancellable, error);
6303 if (connection == NULL)
6306 if (!g_initable_init (G_INITABLE (connection), cancellable, error))
6308 g_object_unref (connection);
6317 bus_get_async_initable_cb (GObject *source_object,
6321 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
6325 if (!g_async_initable_init_finish (G_ASYNC_INITABLE (source_object),
6329 g_assert (error != NULL);
6330 g_simple_async_result_take_error (simple, error);
6331 g_object_unref (source_object);
6335 g_simple_async_result_set_op_res_gpointer (simple,
6339 g_simple_async_result_complete_in_idle (simple);
6340 g_object_unref (simple);
6345 * @bus_type: A #GBusType.
6346 * @cancellable: A #GCancellable or %NULL.
6347 * @callback: A #GAsyncReadyCallback to call when the request is satisfied.
6348 * @user_data: The data to pass to @callback.
6350 * Asynchronously connects to the message bus specified by @bus_type.
6352 * When the operation is finished, @callback will be invoked. You can
6353 * then call g_bus_get_finish() to get the result of the operation.
6355 * This is a asynchronous failable function. See g_bus_get_sync() for
6356 * the synchronous version.
6361 g_bus_get (GBusType bus_type,
6362 GCancellable *cancellable,
6363 GAsyncReadyCallback callback,
6366 GDBusConnection *connection;
6367 GSimpleAsyncResult *simple;
6370 simple = g_simple_async_result_new (NULL,
6376 connection = get_uninitialized_connection (bus_type, cancellable, &error);
6377 if (connection == NULL)
6379 g_assert (error != NULL);
6380 g_simple_async_result_take_error (simple, error);
6381 g_simple_async_result_complete_in_idle (simple);
6382 g_object_unref (simple);
6386 g_async_initable_init_async (G_ASYNC_INITABLE (connection),
6389 bus_get_async_initable_cb,
6396 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_bus_get().
6397 * @error: Return location for error or %NULL.
6399 * Finishes an operation started with g_bus_get().
6401 * The returned object is a singleton, that is, shared with other
6402 * callers of g_bus_get() and g_bus_get_sync() for @bus_type. In the
6403 * event that you need a private message bus connection, use
6404 * g_dbus_address_get_for_bus() and
6405 * g_dbus_connection_new_for_address().
6407 * Note that the returned #GDBusConnection object will (usually) have
6408 * the #GDBusConnection:exit-on-close property set to %TRUE.
6410 * Returns: (transfer full): A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
6415 g_bus_get_finish (GAsyncResult *res,
6418 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
6420 GDBusConnection *ret;
6422 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
6424 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_bus_get);
6428 if (g_simple_async_result_propagate_error (simple, error))
6431 object = g_simple_async_result_get_op_res_gpointer (simple);
6432 g_assert (object != NULL);
6433 ret = g_object_ref (G_DBUS_CONNECTION (object));
6439 /* ---------------------------------------------------------------------------------------------------- */