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 * - Validate all data (e.g. UTF-8) and check all the required D-Bus headers
27 * are present and forbidden ones aren't
28 * - When writing: g_dbus_message_to_blob()
29 * - When reading: g_dbus_message_new_from_blob()
31 * - would be nice to expose GDBusAuthMechanism and an extension point
33 * - Need to rewrite GDBusAuth and rework GDBusAuthMechanism. In particular
34 * the mechanism VFuncs need to be able to set an error.
36 * - Need to document other mechanisms/sources for determining the D-Bus
37 * address of a well-known bus.
39 * - e.g. on Win32 we need code like from here
41 * http://cgit.freedesktop.org/~david/gdbus-standalone/tree/gdbus/gdbusaddress.c#n900
43 * that was never copied over here because it originally was copy-paste
44 * from the GPLv2 / AFL 2.1 libdbus sources.
46 * - on OS X we need to look in launchd for the address
48 * https://bugs.freedesktop.org/show_bug.cgi?id=14259
50 * - on X11 we need to look in a X11 property on the X server
51 * - (we can also just use dbus-launch(1) from the D-Bus
54 * - (ideally) this requires D-Bus spec work because none of
55 * this has never really been specced out properly (excect
58 * - Related to the above, we also need to be able to launch a message bus
59 * instance.... Since we don't want to write our own bus daemon we should
60 * launch dbus-daemon(1) (thus: Win32 and OS X need to bundle it)
62 * - probably want a G_DBUS_NONCE_TCP_TMPDIR environment variable
63 * to specify where the nonce is stored. This will allow people to use
64 * G_DBUS_NONCE_TCP_TMPDIR=/mnt/secure.company.server/dbus-nonce-dir
65 * to easily acheive secure RPC via nonce-tcp.
67 * - need to expose an extension point for resolving D-Bus address and
68 * turning them into GIOStream objects. This will allow us to implement
69 * e.g. X11 D-Bus transports without dlopen()'ing or linking against
71 * - see g_dbus_address_connect() in gdbusaddress.c
73 * - would be cute to use kernel-specific APIs to resolve fds for
74 * debug output when using G_DBUS_DEBUG=messages, e.g. in addition to
76 * fd 21: dev=8:1,mode=0100644,ino=1171231,uid=0,gid=0,rdev=0:0,size=234,atime=1273070640,mtime=1267126160,ctime=1267126160
78 * maybe we can show more information about what fd 21 really is.
79 * Ryan suggests looking in /proc/self/fd for clues / symlinks!
80 * Initial experiments on Linux 2.6 suggests that the symlink looks
85 * e.g. not of much use.
87 * - GDBus High-Level docs
88 * - Proxy: properties, signals...
89 * - Connection: IOStream based, ::close, connection setup steps
90 * mainloop integration, threading
91 * - Differences from libdbus (extend "Migrating from")
92 * - the message handling thread
93 * - Using GVariant instead of GValue
94 * - Explain why the high-level API is a good thing and what
95 * kind of pitfalls it avoids
96 * - Export objects before claiming names
97 * - Talk about auto-starting services (cf. GBusNameWatcherFlags)
99 * - Mention in all API that the GVariant is sunk. Also mention
100 * when the returned GVariant is floating.
102 * - Consistent timeout handling (25s vs 30s?)
104 * - Update GDBusAuthObserver (s/deny/authorize/)
112 #include "gdbusauth.h"
113 #include "gdbusutils.h"
114 #include "gdbusaddress.h"
115 #include "gdbusmessage.h"
116 #include "gdbusconnection.h"
117 #include "gdbuserror.h"
118 #include "gioenumtypes.h"
119 #include "gdbusintrospection.h"
120 #include "gdbusmethodinvocation.h"
121 #include "gdbusprivate.h"
122 #include "gdbusauthobserver.h"
123 #include "gio-marshal.h"
124 #include "ginitable.h"
125 #include "gasyncinitable.h"
126 #include "giostream.h"
127 #include "gasyncresult.h"
128 #include "gsimpleasyncresult.h"
131 #include <gio/gunixconnection.h>
132 #include <gio/gunixfdmessage.h>
134 #include <sys/types.h>
137 #include "glibintl.h"
138 #include "gioalias.h"
141 * SECTION:gdbusconnection
142 * @short_description: D-Bus Connections
143 * @include: gio/gio.h
145 * The #GDBusConnection type is used for D-Bus connections to remote
146 * peers such as a message buses. It is a low-level API that offers a
147 * lot of flexibility. For instance, it lets you establish a connection
148 * over any transport that can by represented as an #GIOStream.
150 * This class is rarely used directly in D-Bus clients. If you are writing
151 * an D-Bus client, it is often easier to use the g_bus_own_name(),
152 * g_bus_watch_name() or g_bus_watch_proxy() APIs.
154 * <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>
156 * <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>
158 * <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>
161 /* ---------------------------------------------------------------------------------------------------- */
163 G_LOCK_DEFINE_STATIC (message_bus_lock);
165 static GDBusConnection *the_session_bus = NULL;
166 static GDBusConnection *the_system_bus = NULL;
168 /* ---------------------------------------------------------------------------------------------------- */
171 _g_strv_has_string (const gchar* const *haystack,
176 for (n = 0; haystack != NULL && haystack[n] != NULL; n++)
178 if (g_strcmp0 (haystack[n], needle) == 0)
184 /* ---------------------------------------------------------------------------------------------------- */
187 #define CONNECTION_ENSURE_LOCK(obj) do { ; } while (FALSE)
189 // TODO: for some reason this doesn't work on Windows
190 #define CONNECTION_ENSURE_LOCK(obj) do { \
191 if (G_UNLIKELY (g_mutex_trylock((obj)->priv->lock))) \
193 g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
194 "CONNECTION_ENSURE_LOCK: GDBusConnection object lock is not locked"); \
199 #define CONNECTION_LOCK(obj) do { \
200 g_mutex_lock ((obj)->priv->lock); \
203 #define CONNECTION_UNLOCK(obj) do { \
204 g_mutex_unlock ((obj)->priv->lock); \
207 struct _GDBusConnectionPrivate
209 /* ------------------------------------------------------------------------ */
210 /* -- General object state ------------------------------------------------ */
211 /* ------------------------------------------------------------------------ */
213 /* object-wide lock */
216 /* A lock used in the init() method of the GInitable interface - see comments
217 * in initable_init() for why a separate lock is needed
221 /* Set (by loading the contents of /var/lib/dbus/machine-id) the first time
222 * someone calls org.freedesktop.DBus.GetMachineId()
226 /* The underlying stream used for communication */
229 /* The object used for authentication (if any) */
232 /* Set to TRUE if the connection has been closed */
235 /* Last serial used */
238 /* The object used to send/receive message */
241 /* If connected to a message bus, this contains the unique name assigned to
242 * us by the bus (e.g. ":1.42")
244 gchar *bus_unique_name;
246 /* The GUID returned by the other side if we authenticed as a client or
247 * the GUID to use if authenticating as a server
251 /* set to TRUE exactly when initable_init() has finished running */
252 gboolean is_initialized;
254 /* If the connection could not be established during initable_init(), this GError will set */
255 GError *initialization_error;
257 /* The result of g_main_context_get_thread_default() when the object
258 * was created (the GObject _init() function) - this is used for delivery
259 * of the :closed GObject signal.
261 GMainContext *main_context_at_construction;
263 /* construct properties */
265 GDBusConnectionFlags flags;
267 /* Map used for managing method replies */
268 GHashTable *map_method_serial_to_send_message_data; /* guint32 -> SendMessageData* */
270 /* Maps used for managing signal subscription */
271 GHashTable *map_rule_to_signal_data; /* gchar* -> SignalData */
272 GHashTable *map_id_to_signal_data; /* guint -> SignalData */
273 GHashTable *map_sender_to_signal_data_array; /* gchar* -> GPtrArray* of SignalData */
275 /* Maps used for managing exported objects and subtrees */
276 GHashTable *map_object_path_to_eo; /* gchar* -> ExportedObject* */
277 GHashTable *map_id_to_ei; /* guint -> ExportedInterface* */
278 GHashTable *map_object_path_to_es; /* gchar* -> ExportedSubtree* */
279 GHashTable *map_id_to_es; /* guint -> ExportedSubtree* */
281 /* Structure used for message filters */
284 /* Whether to exit on close */
285 gboolean exit_on_close;
287 /* Capabilities negotiated during authentication */
288 GDBusCapabilityFlags capabilities;
290 GDBusAuthObserver *authentication_observer;
291 GCredentials *crendentials;
294 typedef struct ExportedObject ExportedObject;
295 static void exported_object_free (ExportedObject *eo);
297 typedef struct ExportedSubtree ExportedSubtree;
298 static void exported_subtree_free (ExportedSubtree *es);
316 PROP_CAPABILITY_FLAGS,
317 PROP_AUTHENTICATION_OBSERVER,
320 static void distribute_signals (GDBusConnection *connection,
321 GDBusMessage *message);
323 static void distribute_method_call (GDBusConnection *connection,
324 GDBusMessage *message);
326 static gboolean handle_generic_unlocked (GDBusConnection *connection,
327 GDBusMessage *message);
330 static void purge_all_signal_subscriptions (GDBusConnection *connection);
331 static void purge_all_filters (GDBusConnection *connection);
333 #define _G_ENSURE_LOCK(name) do { \
334 if (G_UNLIKELY (G_TRYLOCK(name))) \
336 g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
337 "_G_ENSURE_LOCK: Lock `" #name "' is not locked"); \
341 static guint signals[LAST_SIGNAL] = { 0 };
343 static void initable_iface_init (GInitableIface *initable_iface);
344 static void async_initable_iface_init (GAsyncInitableIface *async_initable_iface);
346 G_DEFINE_TYPE_WITH_CODE (GDBusConnection, g_dbus_connection, G_TYPE_OBJECT,
347 G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, initable_iface_init)
348 G_IMPLEMENT_INTERFACE (G_TYPE_ASYNC_INITABLE, async_initable_iface_init)
352 g_dbus_connection_dispose (GObject *object)
354 GDBusConnection *connection = G_DBUS_CONNECTION (object);
356 G_LOCK (message_bus_lock);
357 //g_debug ("disposing %p", connection);
358 if (connection == the_session_bus)
360 the_session_bus = NULL;
362 else if (connection == the_system_bus)
364 the_system_bus = NULL;
366 if (connection->priv->worker != NULL)
368 _g_dbus_worker_stop (connection->priv->worker);
369 connection->priv->worker = NULL;
371 G_UNLOCK (message_bus_lock);
373 if (G_OBJECT_CLASS (g_dbus_connection_parent_class)->dispose != NULL)
374 G_OBJECT_CLASS (g_dbus_connection_parent_class)->dispose (object);
378 g_dbus_connection_finalize (GObject *object)
380 GDBusConnection *connection = G_DBUS_CONNECTION (object);
382 if (connection->priv->authentication_observer != NULL)
383 g_object_unref (connection->priv->authentication_observer);
385 if (connection->priv->auth != NULL)
386 g_object_unref (connection->priv->auth);
388 //g_debug ("finalizing %p", connection);
389 if (connection->priv->stream != NULL)
391 /* We don't really care if closing the stream succeeds or not */
392 g_io_stream_close_async (connection->priv->stream,
394 NULL, /* GCancellable */
395 NULL, /* GAsyncReadyCallback */
396 NULL); /* userdata */
397 g_object_unref (connection->priv->stream);
398 connection->priv->stream = NULL;
401 g_free (connection->priv->address);
403 g_free (connection->priv->guid);
404 g_free (connection->priv->bus_unique_name);
406 if (connection->priv->initialization_error != NULL)
407 g_error_free (connection->priv->initialization_error);
409 g_hash_table_unref (connection->priv->map_method_serial_to_send_message_data);
411 purge_all_signal_subscriptions (connection);
412 g_hash_table_unref (connection->priv->map_rule_to_signal_data);
413 g_hash_table_unref (connection->priv->map_id_to_signal_data);
414 g_hash_table_unref (connection->priv->map_sender_to_signal_data_array);
416 g_hash_table_unref (connection->priv->map_id_to_ei);
417 g_hash_table_unref (connection->priv->map_object_path_to_eo);
418 g_hash_table_unref (connection->priv->map_id_to_es);
419 g_hash_table_unref (connection->priv->map_object_path_to_es);
421 purge_all_filters (connection);
422 g_ptr_array_unref (connection->priv->filters);
424 if (connection->priv->main_context_at_construction != NULL)
425 g_main_context_unref (connection->priv->main_context_at_construction);
427 g_free (connection->priv->machine_id);
429 g_mutex_free (connection->priv->init_lock);
430 g_mutex_free (connection->priv->lock);
432 G_OBJECT_CLASS (g_dbus_connection_parent_class)->finalize (object);
436 g_dbus_connection_get_property (GObject *object,
441 GDBusConnection *connection = G_DBUS_CONNECTION (object);
446 g_value_set_object (value, g_dbus_connection_get_stream (connection));
450 g_value_set_string (value, g_dbus_connection_get_guid (connection));
453 case PROP_UNIQUE_NAME:
454 g_value_set_string (value, g_dbus_connection_get_unique_name (connection));
458 g_value_set_boolean (value, g_dbus_connection_is_closed (connection));
461 case PROP_EXIT_ON_CLOSE:
462 g_value_set_boolean (value, g_dbus_connection_get_exit_on_close (connection));
465 case PROP_CAPABILITY_FLAGS:
466 g_value_set_flags (value, g_dbus_connection_get_capabilities (connection));
470 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
476 g_dbus_connection_set_property (GObject *object,
481 GDBusConnection *connection = G_DBUS_CONNECTION (object);
486 connection->priv->stream = g_value_dup_object (value);
490 connection->priv->guid = g_value_dup_string (value);
494 connection->priv->address = g_value_dup_string (value);
498 connection->priv->flags = g_value_get_flags (value);
501 case PROP_EXIT_ON_CLOSE:
502 g_dbus_connection_set_exit_on_close (connection, g_value_get_boolean (value));
505 case PROP_AUTHENTICATION_OBSERVER:
506 connection->priv->authentication_observer = g_value_dup_object (value);
510 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
516 g_dbus_connection_real_closed (GDBusConnection *connection,
517 gboolean remote_peer_vanished,
520 if (remote_peer_vanished && connection->priv->exit_on_close)
522 g_print ("%s: Remote peer vanished. Exiting.\n", G_STRFUNC);
528 g_dbus_connection_class_init (GDBusConnectionClass *klass)
530 GObjectClass *gobject_class;
532 g_type_class_add_private (klass, sizeof (GDBusConnectionPrivate));
534 gobject_class = G_OBJECT_CLASS (klass);
536 gobject_class->finalize = g_dbus_connection_finalize;
537 gobject_class->dispose = g_dbus_connection_dispose;
538 gobject_class->set_property = g_dbus_connection_set_property;
539 gobject_class->get_property = g_dbus_connection_get_property;
541 klass->closed = g_dbus_connection_real_closed;
544 * GDBusConnection:stream:
546 * The underlying #GIOStream used for I/O.
550 g_object_class_install_property (gobject_class,
552 g_param_spec_object ("stream",
554 P_("The underlying streams used for I/O"),
558 G_PARAM_CONSTRUCT_ONLY |
559 G_PARAM_STATIC_NAME |
560 G_PARAM_STATIC_BLURB |
561 G_PARAM_STATIC_NICK));
564 * GDBusConnection:address:
566 * A D-Bus address specifying potential endpoints that can be used
567 * when establishing the connection.
571 g_object_class_install_property (gobject_class,
573 g_param_spec_string ("address",
575 P_("D-Bus address specifying potential socket endpoints"),
578 G_PARAM_CONSTRUCT_ONLY |
579 G_PARAM_STATIC_NAME |
580 G_PARAM_STATIC_BLURB |
581 G_PARAM_STATIC_NICK));
584 * GDBusConnection:flags:
586 * Flags from the #GDBusConnectionFlags enumeration.
590 g_object_class_install_property (gobject_class,
592 g_param_spec_flags ("flags",
595 G_TYPE_DBUS_CONNECTION_FLAGS,
596 G_DBUS_CONNECTION_FLAGS_NONE,
598 G_PARAM_CONSTRUCT_ONLY |
599 G_PARAM_STATIC_NAME |
600 G_PARAM_STATIC_BLURB |
601 G_PARAM_STATIC_NICK));
604 * GDBusConnection:guid:
606 * The GUID of the peer performing the role of server when
609 * If you are constructing a #GDBusConnection and pass
610 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER in the
611 * #GDBusConnection:flags property then you MUST also set this
612 * property to a valid guid.
614 * If you are constructing a #GDBusConnection and pass
615 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT in the
616 * #GDBusConnection:flags property you will be able to read the GUID
617 * of the other peer here after the connection has been successfully
622 g_object_class_install_property (gobject_class,
624 g_param_spec_string ("guid",
626 P_("GUID of the server peer"),
630 G_PARAM_CONSTRUCT_ONLY |
631 G_PARAM_STATIC_NAME |
632 G_PARAM_STATIC_BLURB |
633 G_PARAM_STATIC_NICK));
636 * GDBusConnection:unique-name:
638 * The unique name as assigned by the message bus or %NULL if the
639 * connection is not open or not a message bus connection.
643 g_object_class_install_property (gobject_class,
645 g_param_spec_string ("unique-name",
647 P_("Unique name of bus connection"),
650 G_PARAM_STATIC_NAME |
651 G_PARAM_STATIC_BLURB |
652 G_PARAM_STATIC_NICK));
655 * GDBusConnection:closed:
657 * A boolean specifying whether the connection has been closed.
661 g_object_class_install_property (gobject_class,
663 g_param_spec_boolean ("closed",
665 P_("Whether the connection is closed"),
668 G_PARAM_STATIC_NAME |
669 G_PARAM_STATIC_BLURB |
670 G_PARAM_STATIC_NICK));
673 * GDBusConnection:exit-on-close:
675 * A boolean specifying whether the process will be terminated (by
676 * calling <literal>raise(SIGTERM)</literal>) if the connection
677 * is closed by the remote peer.
681 g_object_class_install_property (gobject_class,
683 g_param_spec_boolean ("exit-on-close",
685 P_("Whether the process is terminated when the connection is closed"),
689 G_PARAM_STATIC_NAME |
690 G_PARAM_STATIC_BLURB |
691 G_PARAM_STATIC_NICK));
694 * GDBusConnection:capabilities:
696 * Flags from the #GDBusCapabilityFlags enumeration
697 * representing connection features negotiated with the other peer.
701 g_object_class_install_property (gobject_class,
702 PROP_CAPABILITY_FLAGS,
703 g_param_spec_flags ("capabilities",
706 G_TYPE_DBUS_CAPABILITY_FLAGS,
707 G_DBUS_CAPABILITY_FLAGS_NONE,
709 G_PARAM_STATIC_NAME |
710 G_PARAM_STATIC_BLURB |
711 G_PARAM_STATIC_NICK));
714 * GDBusConnection:authentication-observer:
716 * A #GDBusAuthObserver object to assist in the authentication process or %NULL.
720 g_object_class_install_property (gobject_class,
721 PROP_AUTHENTICATION_OBSERVER,
722 g_param_spec_object ("authentication-observer",
723 P_("Authentication Observer"),
724 P_("Object used to assist in the authentication process"),
725 G_TYPE_DBUS_AUTH_OBSERVER,
727 G_PARAM_CONSTRUCT_ONLY |
728 G_PARAM_STATIC_NAME |
729 G_PARAM_STATIC_BLURB |
730 G_PARAM_STATIC_NICK));
733 * GDBusConnection::closed:
734 * @connection: The #GDBusConnection emitting the signal.
735 * @remote_peer_vanished: %TRUE if @connection is closed because the
736 * remote peer closed its end of the connection.
737 * @error: A #GError with more details about the event or %NULL.
739 * Emitted when the connection is closed.
741 * The cause of this event can be
744 * If g_dbus_connection_close() is called. In this case
745 * @remote_peer_vanished is set to %FALSE and @error is %NULL.
748 * If the remote peer closes the connection. In this case
749 * @remote_peer_vanished is set to %TRUE and @error is set.
752 * If the remote peer sends invalid or malformed data. In this
753 * case @remote_peer_vanished is set to %FALSE and @error
758 * Upon receiving this signal, you should give up your reference to
759 * @connection. You are guaranteed that this signal is emitted only
764 signals[CLOSED_SIGNAL] = g_signal_new ("closed",
765 G_TYPE_DBUS_CONNECTION,
767 G_STRUCT_OFFSET (GDBusConnectionClass, closed),
770 _gio_marshal_VOID__BOOLEAN_BOXED,
778 g_dbus_connection_init (GDBusConnection *connection)
780 connection->priv = G_TYPE_INSTANCE_GET_PRIVATE (connection, G_TYPE_DBUS_CONNECTION, GDBusConnectionPrivate);
782 connection->priv->lock = g_mutex_new ();
783 connection->priv->init_lock = g_mutex_new ();
785 connection->priv->map_method_serial_to_send_message_data = g_hash_table_new (g_direct_hash, g_direct_equal);
787 connection->priv->map_rule_to_signal_data = g_hash_table_new (g_str_hash,
789 connection->priv->map_id_to_signal_data = g_hash_table_new (g_direct_hash,
791 connection->priv->map_sender_to_signal_data_array = g_hash_table_new_full (g_str_hash,
796 connection->priv->map_object_path_to_eo = g_hash_table_new_full (g_str_hash,
799 (GDestroyNotify) exported_object_free);
801 connection->priv->map_id_to_ei = g_hash_table_new (g_direct_hash,
804 connection->priv->map_object_path_to_es = g_hash_table_new_full (g_str_hash,
807 (GDestroyNotify) exported_subtree_free);
809 connection->priv->map_id_to_es = g_hash_table_new (g_direct_hash,
812 connection->priv->main_context_at_construction = g_main_context_get_thread_default ();
813 if (connection->priv->main_context_at_construction != NULL)
814 g_main_context_ref (connection->priv->main_context_at_construction);
816 connection->priv->filters = g_ptr_array_new ();
820 * g_dbus_connection_get_stream:
821 * @connection: a #GDBusConnection
823 * Gets the underlying stream used for IO.
825 * Returns: the stream used for IO
830 g_dbus_connection_get_stream (GDBusConnection *connection)
832 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
833 return connection->priv->stream;
838 * g_dbus_connection_is_closed:
839 * @connection: A #GDBusConnection.
841 * Gets whether @connection is closed.
843 * Returns: %TRUE if the connection is closed, %FALSE otherwise.
848 g_dbus_connection_is_closed (GDBusConnection *connection)
850 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
851 return connection->priv->closed;
855 * g_dbus_connection_get_capabilities:
856 * @connection: A #GDBusConnection.
858 * Gets the capabilities negotiated with the remote peer
860 * Returns: Zero or more flags from the #GDBusCapabilityFlags enumeration.
865 g_dbus_connection_get_capabilities (GDBusConnection *connection)
867 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), G_DBUS_CAPABILITY_FLAGS_NONE);
868 return connection->priv->capabilities;
872 /* ---------------------------------------------------------------------------------------------------- */
876 GDBusConnection *connection;
878 gboolean remote_peer_vanished;
882 emit_closed_data_free (EmitClosedData *data)
884 g_object_unref (data->connection);
885 if (data->error != NULL)
886 g_error_free (data->error);
891 emit_closed_in_idle (gpointer user_data)
893 EmitClosedData *data = user_data;
896 g_object_notify (G_OBJECT (data->connection), "closed");
897 g_signal_emit (data->connection,
898 signals[CLOSED_SIGNAL],
900 data->remote_peer_vanished,
906 /* Can be called from any thread, must hold lock */
908 set_closed_unlocked (GDBusConnection *connection,
909 gboolean remote_peer_vanished,
912 GSource *idle_source;
913 EmitClosedData *data;
915 CONNECTION_ENSURE_LOCK (connection);
917 g_assert (!connection->priv->closed);
919 connection->priv->closed = TRUE;
921 data = g_new0 (EmitClosedData, 1);
922 data->connection = g_object_ref (connection);
923 data->remote_peer_vanished = remote_peer_vanished;
924 data->error = error != NULL ? g_error_copy (error) : NULL;
926 idle_source = g_idle_source_new ();
927 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
928 g_source_set_callback (idle_source,
931 (GDestroyNotify) emit_closed_data_free);
932 g_source_attach (idle_source, connection->priv->main_context_at_construction);
933 g_source_unref (idle_source);
936 /* ---------------------------------------------------------------------------------------------------- */
939 * g_dbus_connection_close:
940 * @connection: A #GDBusConnection.
942 * Closes @connection. Note that this never causes the process to
943 * exit (this might only happen if the other end of a shared message
944 * bus connection disconnects).
946 * If @connection is already closed, this method does nothing.
951 g_dbus_connection_close (GDBusConnection *connection)
953 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
955 CONNECTION_LOCK (connection);
956 if (!connection->priv->closed)
958 GError *error = NULL;
960 /* TODO: do this async */
961 //g_debug ("closing connection %p's stream %p", connection, connection->priv->stream);
962 if (!g_io_stream_close (connection->priv->stream, NULL, &error))
964 g_warning ("Error closing stream: %s", error->message);
965 g_error_free (error);
968 set_closed_unlocked (connection, FALSE, NULL);
970 CONNECTION_UNLOCK (connection);
973 /* ---------------------------------------------------------------------------------------------------- */
976 g_dbus_connection_send_message_unlocked (GDBusConnection *connection,
977 GDBusMessage *message,
978 volatile guint32 *out_serial,
983 guint32 serial_to_use;
986 CONNECTION_ENSURE_LOCK (connection);
988 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
989 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), FALSE);
991 /* TODO: check all necessary headers are present */
996 if (out_serial != NULL)
999 if (connection->priv->closed)
1001 g_set_error_literal (error,
1004 _("The connection is closed"));
1008 blob = g_dbus_message_to_blob (message,
1014 serial_to_use = ++connection->priv->last_serial; /* TODO: handle overflow */
1019 ((guint32 *) blob)[2] = GUINT32_TO_LE (serial_to_use);
1022 ((guint32 *) blob)[2] = GUINT32_TO_BE (serial_to_use);
1025 g_assert_not_reached ();
1030 g_printerr ("Writing message of %" G_GSIZE_FORMAT " bytes (serial %d) on %p:\n",
1031 blob_size, serial_to_use, connection);
1032 g_printerr ("----\n");
1033 hexdump (blob, blob_size);
1034 g_printerr ("----\n");
1037 /* TODO: use connection->priv->auth to encode the blob */
1039 if (out_serial != NULL)
1040 *out_serial = serial_to_use;
1042 g_dbus_message_set_serial (message, serial_to_use);
1044 _g_dbus_worker_send_message (connection->priv->worker,
1048 blob = NULL; /* since _g_dbus_worker_send_message() steals the blob */
1059 * g_dbus_connection_send_message:
1060 * @connection: A #GDBusConnection.
1061 * @message: A #GDBusMessage
1062 * @out_serial: Return location for serial number assigned to @message when sending it or %NULL.
1063 * @error: Return location for error or %NULL.
1065 * Asynchronously sends @message to the peer represented by @connection.
1067 * If @out_serial is not %NULL, then the serial number assigned to
1068 * @message by @connection will be written to this location prior to
1069 * submitting the message to the underlying transport.
1071 * If @connection is closed then the operation will fail with
1072 * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the operation will
1073 * fail with %G_IO_ERROR_CANCELLED. If @message is not well-formed,
1074 * the operation fails with %G_IO_ERROR_INVALID_ARGUMENT.
1076 * See <xref linkend="gdbus-server"/> and <xref
1077 * linkend="gdbus-unix-fd-client"/> for an example of how to use this
1078 * low-level API to send and receive UNIX file descriptors.
1080 * Returns: %TRUE if the message was well-formed and queued for
1081 * transmission, %FALSE if @error is set.
1086 g_dbus_connection_send_message (GDBusConnection *connection,
1087 GDBusMessage *message,
1088 volatile guint32 *out_serial,
1093 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
1094 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), FALSE);
1095 g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
1097 CONNECTION_LOCK (connection);
1098 ret = g_dbus_connection_send_message_unlocked (connection, message, out_serial, error);
1099 CONNECTION_UNLOCK (connection);
1103 /* ---------------------------------------------------------------------------------------------------- */
1107 volatile gint ref_count;
1108 GDBusConnection *connection;
1110 GSimpleAsyncResult *simple;
1112 GMainContext *main_context;
1114 GCancellable *cancellable;
1116 gulong cancellable_handler_id;
1118 GSource *timeout_source;
1123 static SendMessageData *
1124 send_message_data_ref (SendMessageData *data)
1126 g_atomic_int_inc (&data->ref_count);
1131 send_message_data_unref (SendMessageData *data)
1133 if (g_atomic_int_dec_and_test (&data->ref_count))
1135 g_assert (data->timeout_source == NULL);
1136 g_assert (data->simple == NULL);
1137 g_assert (data->cancellable_handler_id == 0);
1138 g_object_unref (data->connection);
1139 if (data->cancellable != NULL)
1140 g_object_unref (data->cancellable);
1141 if (data->main_context != NULL)
1142 g_main_context_unref (data->main_context);
1147 /* ---------------------------------------------------------------------------------------------------- */
1149 /* can be called from any thread with lock held - caller must have prepared GSimpleAsyncResult already */
1151 send_message_with_reply_deliver (SendMessageData *data)
1153 CONNECTION_ENSURE_LOCK (data->connection);
1155 g_assert (!data->delivered);
1157 data->delivered = TRUE;
1159 g_simple_async_result_complete_in_idle (data->simple);
1160 g_object_unref (data->simple);
1161 data->simple = NULL;
1163 if (data->timeout_source != NULL)
1165 g_source_destroy (data->timeout_source);
1166 data->timeout_source = NULL;
1168 if (data->cancellable_handler_id > 0)
1170 g_cancellable_disconnect (data->cancellable, data->cancellable_handler_id);
1171 data->cancellable_handler_id = 0;
1174 g_warn_if_fail (g_hash_table_remove (data->connection->priv->map_method_serial_to_send_message_data,
1175 GUINT_TO_POINTER (data->serial)));
1177 send_message_data_unref (data);
1180 /* ---------------------------------------------------------------------------------------------------- */
1182 /* must hold lock */
1184 send_message_data_deliver_reply_unlocked (SendMessageData *data,
1185 GDBusMessage *reply)
1187 if (data->delivered)
1190 g_simple_async_result_set_op_res_gpointer (data->simple,
1191 g_object_ref (reply),
1194 send_message_with_reply_deliver (data);
1200 /* ---------------------------------------------------------------------------------------------------- */
1203 send_message_with_reply_cancelled_idle_cb (gpointer user_data)
1205 SendMessageData *data = user_data;
1207 CONNECTION_LOCK (data->connection);
1208 if (data->delivered)
1211 g_simple_async_result_set_error (data->simple,
1213 G_IO_ERROR_CANCELLED,
1214 _("Operation was cancelled"));
1216 send_message_with_reply_deliver (data);
1219 CONNECTION_UNLOCK (data->connection);
1223 /* Can be called from any thread with or without lock held */
1225 send_message_with_reply_cancelled_cb (GCancellable *cancellable,
1228 SendMessageData *data = user_data;
1229 GSource *idle_source;
1231 /* postpone cancellation to idle handler since we may be called directly
1232 * via g_cancellable_connect() (e.g. holding lock)
1234 idle_source = g_idle_source_new ();
1235 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
1236 g_source_set_callback (idle_source,
1237 send_message_with_reply_cancelled_idle_cb,
1238 send_message_data_ref (data),
1239 (GDestroyNotify) send_message_data_unref);
1240 g_source_attach (idle_source, data->main_context);
1241 g_source_unref (idle_source);
1244 /* ---------------------------------------------------------------------------------------------------- */
1247 send_message_with_reply_timeout_cb (gpointer user_data)
1249 SendMessageData *data = user_data;
1251 CONNECTION_LOCK (data->connection);
1252 if (data->delivered)
1255 g_simple_async_result_set_error (data->simple,
1257 G_IO_ERROR_TIMED_OUT,
1258 _("Timeout was reached"));
1260 send_message_with_reply_deliver (data);
1263 CONNECTION_UNLOCK (data->connection);
1268 /* ---------------------------------------------------------------------------------------------------- */
1271 g_dbus_connection_send_message_with_reply_unlocked (GDBusConnection *connection,
1272 GDBusMessage *message,
1274 volatile guint32 *out_serial,
1275 GCancellable *cancellable,
1276 GAsyncReadyCallback callback,
1279 GSimpleAsyncResult *simple;
1280 SendMessageData *data;
1282 volatile guint32 serial;
1286 if (out_serial == NULL)
1287 out_serial = &serial;
1289 if (timeout_msec == -1)
1290 timeout_msec = 30 * 1000; /* TODO: check 30 secs is the default timeout */
1292 simple = g_simple_async_result_new (G_OBJECT (connection),
1295 g_dbus_connection_send_message_with_reply);
1297 if (g_cancellable_is_cancelled (cancellable))
1299 g_simple_async_result_set_error (simple,
1301 G_IO_ERROR_CANCELLED,
1302 _("Operation was cancelled"));
1303 g_simple_async_result_complete_in_idle (simple);
1304 g_object_unref (simple);
1308 if (connection->priv->closed)
1310 g_simple_async_result_set_error (simple,
1313 _("The connection is closed"));
1314 g_simple_async_result_complete_in_idle (simple);
1315 g_object_unref (simple);
1320 if (!g_dbus_connection_send_message_unlocked (connection, message, out_serial, &error))
1322 g_simple_async_result_set_from_error (simple, error);
1323 g_simple_async_result_complete_in_idle (simple);
1324 g_object_unref (simple);
1328 data = g_new0 (SendMessageData, 1);
1329 data->ref_count = 1;
1330 data->connection = g_object_ref (connection);
1331 data->simple = simple;
1332 data->serial = *out_serial;
1333 data->main_context = g_main_context_get_thread_default ();
1334 if (data->main_context != NULL)
1335 g_main_context_ref (data->main_context);
1337 if (cancellable != NULL)
1339 data->cancellable = g_object_ref (cancellable);
1340 data->cancellable_handler_id = g_cancellable_connect (cancellable,
1341 G_CALLBACK (send_message_with_reply_cancelled_cb),
1342 send_message_data_ref (data),
1343 (GDestroyNotify) send_message_data_unref);
1344 g_object_set_data_full (G_OBJECT (simple),
1346 g_object_ref (cancellable),
1347 (GDestroyNotify) g_object_unref);
1350 data->timeout_source = g_timeout_source_new (timeout_msec);
1351 g_source_set_priority (data->timeout_source, G_PRIORITY_DEFAULT);
1352 g_source_set_callback (data->timeout_source,
1353 send_message_with_reply_timeout_cb,
1354 send_message_data_ref (data),
1355 (GDestroyNotify) send_message_data_unref);
1356 g_source_attach (data->timeout_source, data->main_context);
1357 g_source_unref (data->timeout_source);
1359 g_hash_table_insert (connection->priv->map_method_serial_to_send_message_data,
1360 GUINT_TO_POINTER (*out_serial),
1368 * g_dbus_connection_send_message_with_reply:
1369 * @connection: A #GDBusConnection.
1370 * @message: A #GDBusMessage.
1371 * @timeout_msec: The timeout in milliseconds or -1 to use the default timeout.
1372 * @out_serial: Return location for serial number assigned to @message when sending it or %NULL.
1373 * @cancellable: A #GCancellable or %NULL.
1374 * @callback: A #GAsyncReadyCallback to call when the request is satisfied or %NULL if you don't
1375 * care about the result.
1376 * @user_data: The data to pass to @callback.
1378 * Asynchronously sends @message to the peer represented by @connection.
1380 * If @out_serial is not %NULL, then the serial number assigned to
1381 * @message by @connection will be written to this location prior to
1382 * submitting the message to the underlying transport.
1384 * If @connection is closed then the operation will fail with
1385 * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the operation will
1386 * fail with %G_IO_ERROR_CANCELLED. If @message is not well-formed,
1387 * the operation fails with %G_IO_ERROR_INVALID_ARGUMENT.
1389 * This is an asynchronous method. When the operation is finished, @callback will be invoked
1390 * in the <link linkend="g-main-context-push-thread-default">thread-default main loop</link>
1391 * of the thread you are calling this method from. You can then call
1392 * g_dbus_connection_send_message_with_reply_finish() to get the result of the operation.
1393 * See g_dbus_connection_send_message_with_reply_sync() for the synchronous version.
1395 * See <xref linkend="gdbus-server"/> and <xref
1396 * linkend="gdbus-unix-fd-client"/> for an example of how to use this
1397 * low-level API to send and receive UNIX file descriptors.
1402 g_dbus_connection_send_message_with_reply (GDBusConnection *connection,
1403 GDBusMessage *message,
1405 volatile guint32 *out_serial,
1406 GCancellable *cancellable,
1407 GAsyncReadyCallback callback,
1410 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
1411 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
1412 g_return_if_fail (timeout_msec >= 0 || timeout_msec == -1);
1414 CONNECTION_LOCK (connection);
1415 g_dbus_connection_send_message_with_reply_unlocked (connection,
1422 CONNECTION_UNLOCK (connection);
1426 * g_dbus_connection_send_message_with_reply_finish:
1427 * @connection: a #GDBusConnection
1428 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_send_message_with_reply().
1429 * @error: Return location for error or %NULL.
1431 * Finishes an operation started with g_dbus_connection_send_message_with_reply().
1433 * Note that @error is only set if a local in-process error
1434 * occured. That is to say that the returned #GDBusMessage object may
1435 * be of type %G_DBUS_MESSAGE_TYPE_ERROR. Use
1436 * g_dbus_message_to_gerror() to transcode this to a #GError.
1438 * See <xref linkend="gdbus-server"/> and <xref
1439 * linkend="gdbus-unix-fd-client"/> for an example of how to use this
1440 * low-level API to send and receive UNIX file descriptors.
1442 * Returns: A #GDBusMessage or %NULL if @error is set.
1447 g_dbus_connection_send_message_with_reply_finish (GDBusConnection *connection,
1451 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
1452 GDBusMessage *reply;
1453 GCancellable *cancellable;
1455 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
1456 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
1460 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_dbus_connection_send_message_with_reply);
1462 if (g_simple_async_result_propagate_error (simple, error))
1465 reply = g_object_ref (g_simple_async_result_get_op_res_gpointer (simple));
1466 cancellable = g_object_get_data (G_OBJECT (simple), "cancellable");
1467 if (cancellable != NULL && g_cancellable_is_cancelled (cancellable))
1469 g_object_unref (reply);
1471 g_set_error_literal (error,
1473 G_IO_ERROR_CANCELLED,
1474 _("Operation was cancelled"));
1480 /* ---------------------------------------------------------------------------------------------------- */
1485 GMainContext *context;
1487 } SendMessageSyncData;
1490 send_message_with_reply_sync_cb (GDBusConnection *connection,
1494 SendMessageSyncData *data = user_data;
1495 data->res = g_object_ref (res);
1496 g_main_loop_quit (data->loop);
1500 * g_dbus_connection_send_message_with_reply_sync:
1501 * @connection: A #GDBusConnection.
1502 * @message: A #GDBusMessage.
1503 * @timeout_msec: The timeout in milliseconds or -1 to use the default timeout.
1504 * @out_serial: Return location for serial number assigned to @message when sending it or %NULL.
1505 * @cancellable: A #GCancellable or %NULL.
1506 * @error: Return location for error or %NULL.
1508 * Synchronously sends @message to the peer represented by @connection
1509 * and blocks the calling thread until a reply is received or the
1510 * timeout is reached. See g_dbus_connection_send_message_with_reply()
1511 * for the asynchronous version of this method.
1513 * If @out_serial is not %NULL, then the serial number assigned to
1514 * @message by @connection will be written to this location prior to
1515 * submitting the message to the underlying transport.
1517 * If @connection is closed then the operation will fail with
1518 * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the operation will
1519 * fail with %G_IO_ERROR_CANCELLED. If @message is not well-formed,
1520 * the operation fails with %G_IO_ERROR_INVALID_ARGUMENT.
1522 * Note that @error is only set if a local in-process error
1523 * occured. That is to say that the returned #GDBusMessage object may
1524 * be of type %G_DBUS_MESSAGE_TYPE_ERROR. Use
1525 * g_dbus_message_to_gerror() to transcode this to a #GError.
1527 * See <xref linkend="gdbus-server"/> and <xref
1528 * linkend="gdbus-unix-fd-client"/> for an example of how to use this
1529 * low-level API to send and receive UNIX file descriptors.
1531 * Returns: A #GDBusMessage that is the reply to @message or %NULL if @error is set.
1536 g_dbus_connection_send_message_with_reply_sync (GDBusConnection *connection,
1537 GDBusMessage *message,
1539 volatile guint32 *out_serial,
1540 GCancellable *cancellable,
1543 SendMessageSyncData *data;
1544 GDBusMessage *reply;
1546 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
1547 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
1548 g_return_val_if_fail (timeout_msec >= 0 || timeout_msec == -1, NULL);
1549 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
1551 data = g_new0 (SendMessageSyncData, 1);
1552 data->context = g_main_context_new ();
1553 data->loop = g_main_loop_new (data->context, FALSE);
1555 g_main_context_push_thread_default (data->context);
1557 g_dbus_connection_send_message_with_reply (connection,
1562 (GAsyncReadyCallback) send_message_with_reply_sync_cb,
1564 g_main_loop_run (data->loop);
1565 reply = g_dbus_connection_send_message_with_reply_finish (connection,
1569 g_main_context_pop_thread_default (data->context);
1571 g_main_context_unref (data->context);
1572 g_main_loop_unref (data->loop);
1573 g_object_unref (data->res);
1579 /* ---------------------------------------------------------------------------------------------------- */
1583 GDBusMessageFilterFunction func;
1590 GDBusMessageFilterFunction filter_function;
1592 GDestroyNotify user_data_free_func;
1595 /* Called in worker's thread - we must not block */
1597 on_worker_message_received (GDBusWorker *worker,
1598 GDBusMessage *message,
1601 GDBusConnection *connection = G_DBUS_CONNECTION (user_data);
1602 FilterCallback *filters;
1603 gboolean consumed_by_filter;
1607 //g_debug ("in on_worker_message_received");
1609 g_object_ref (connection);
1611 /* First collect the set of callback functions */
1612 CONNECTION_LOCK (connection);
1613 num_filters = connection->priv->filters->len;
1614 filters = g_new0 (FilterCallback, num_filters);
1615 for (n = 0; n < num_filters; n++)
1617 FilterData *data = connection->priv->filters->pdata[n];
1618 filters[n].func = data->filter_function;
1619 filters[n].user_data = data->user_data;
1621 CONNECTION_UNLOCK (connection);
1623 /* the call the filters in order (without holding the lock) */
1624 consumed_by_filter = FALSE;
1625 for (n = 0; n < num_filters; n++)
1627 consumed_by_filter = filters[n].func (connection,
1629 filters[n].user_data);
1630 if (consumed_by_filter)
1634 /* Standard dispatch unless the filter ate the message */
1635 if (!consumed_by_filter)
1637 GDBusMessageType message_type;
1639 message_type = g_dbus_message_get_message_type (message);
1640 if (message_type == G_DBUS_MESSAGE_TYPE_METHOD_RETURN || message_type == G_DBUS_MESSAGE_TYPE_ERROR)
1642 guint32 reply_serial;
1643 SendMessageData *send_message_data;
1645 reply_serial = g_dbus_message_get_reply_serial (message);
1646 CONNECTION_LOCK (connection);
1647 send_message_data = g_hash_table_lookup (connection->priv->map_method_serial_to_send_message_data,
1648 GUINT_TO_POINTER (reply_serial));
1649 if (send_message_data != NULL)
1651 //g_debug ("delivering reply/error for serial %d for %p", reply_serial, connection);
1652 send_message_data_deliver_reply_unlocked (send_message_data, message);
1656 //g_debug ("message reply/error for serial %d but no SendMessageData found for %p", reply_serial, connection);
1658 CONNECTION_UNLOCK (connection);
1660 else if (message_type == G_DBUS_MESSAGE_TYPE_SIGNAL)
1662 CONNECTION_LOCK (connection);
1663 distribute_signals (connection, message);
1664 CONNECTION_UNLOCK (connection);
1666 else if (message_type == G_DBUS_MESSAGE_TYPE_METHOD_CALL)
1668 CONNECTION_LOCK (connection);
1669 distribute_method_call (connection, message);
1670 CONNECTION_UNLOCK (connection);
1674 g_object_unref (connection);
1678 /* Called in worker's thread - we must not block */
1680 on_worker_closed (GDBusWorker *worker,
1681 gboolean remote_peer_vanished,
1685 GDBusConnection *connection = G_DBUS_CONNECTION (user_data);
1687 //g_debug ("in on_worker_closed: %s", error->message);
1689 CONNECTION_LOCK (connection);
1690 if (!connection->priv->closed)
1691 set_closed_unlocked (connection, remote_peer_vanished, error);
1692 CONNECTION_UNLOCK (connection);
1695 /* ---------------------------------------------------------------------------------------------------- */
1697 /* Determines the biggest set of capabilities we can support on this connection */
1698 static GDBusCapabilityFlags
1699 get_offered_capabilities_max (GDBusConnection *connection)
1701 GDBusCapabilityFlags ret;
1702 ret = G_DBUS_CAPABILITY_FLAGS_NONE;
1704 if (G_IS_UNIX_CONNECTION (connection->priv->stream))
1705 ret |= G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING;
1711 initable_init (GInitable *initable,
1712 GCancellable *cancellable,
1715 GDBusConnection *connection = G_DBUS_CONNECTION (initable);
1718 /* This method needs to be idempotent to work with the singleton
1719 * pattern. See the docs for g_initable_init(). We implement this by
1722 * Unfortunately we can't use the main lock since the on_worker_*()
1723 * callbacks above needs the lock during initialization (for message
1724 * bus connections we do a synchronous Hello() call on the bus).
1726 g_mutex_lock (connection->priv->init_lock);
1730 if (connection->priv->is_initialized)
1732 if (connection->priv->stream != NULL)
1735 g_assert (connection->priv->initialization_error != NULL);
1738 g_assert (connection->priv->initialization_error == NULL);
1740 /* The user can pass multiple (but mutally exclusive) construct
1743 * - stream (of type GIOStream)
1744 * - address (of type gchar*)
1746 * At the end of the day we end up with a non-NULL GIOStream
1747 * object in connection->priv->stream.
1749 if (connection->priv->address != NULL)
1751 g_assert (connection->priv->stream == NULL);
1753 if ((connection->priv->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER) ||
1754 (connection->priv->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS))
1756 g_set_error_literal (error,
1758 G_IO_ERROR_INVALID_ARGUMENT,
1759 _("Unsupported flags encountered when constructing a client-side connection"));
1763 connection->priv->stream = g_dbus_address_get_stream_sync (connection->priv->address,
1764 NULL, /* TODO: out_guid */
1766 &connection->priv->initialization_error);
1767 if (connection->priv->stream == NULL)
1770 else if (connection->priv->stream != NULL)
1776 g_assert_not_reached ();
1779 /* Authenticate the connection */
1780 if (connection->priv->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER)
1782 g_assert (!(connection->priv->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT));
1783 g_assert (connection->priv->guid != NULL);
1784 connection->priv->auth = _g_dbus_auth_new (connection->priv->stream);
1785 if (!_g_dbus_auth_run_server (connection->priv->auth,
1786 connection->priv->authentication_observer,
1787 connection->priv->guid,
1788 (connection->priv->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS),
1789 get_offered_capabilities_max (connection),
1790 &connection->priv->capabilities,
1791 &connection->priv->crendentials,
1793 &connection->priv->initialization_error))
1796 else if (connection->priv->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT)
1798 g_assert (!(connection->priv->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER));
1799 g_assert (connection->priv->guid == NULL);
1800 connection->priv->auth = _g_dbus_auth_new (connection->priv->stream);
1801 connection->priv->guid = _g_dbus_auth_run_client (connection->priv->auth,
1802 get_offered_capabilities_max (connection),
1803 &connection->priv->capabilities,
1805 &connection->priv->initialization_error);
1806 if (connection->priv->guid == NULL)
1810 if (connection->priv->authentication_observer != NULL)
1812 g_object_unref (connection->priv->authentication_observer);
1813 connection->priv->authentication_observer = NULL;
1816 //g_output_stream_flush (G_SOCKET_CONNECTION (connection->priv->stream)
1818 //g_debug ("haz unix fd passing powers: %d", connection->priv->capabilities & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING);
1822 * https://bugzilla.gnome.org/show_bug.cgi?id=616458
1826 if (G_IS_SOCKET_CONNECTION (connection->priv->stream))
1828 g_socket_set_blocking (g_socket_connection_get_socket (G_SOCKET_CONNECTION (connection->priv->stream)), FALSE);
1831 connection->priv->worker = _g_dbus_worker_new (connection->priv->stream,
1832 connection->priv->capabilities,
1833 on_worker_message_received,
1837 /* if a bus connection, invoke org.freedesktop.DBus.Hello - this is how we're getting a name */
1838 if (connection->priv->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION)
1840 GVariant *hello_result;
1843 hello_result = g_dbus_connection_call_sync (connection,
1844 "org.freedesktop.DBus", /* name */
1845 "/org/freedesktop/DBus", /* path */
1846 "org.freedesktop.DBus", /* interface */
1848 NULL, /* parameters */
1849 G_DBUS_CALL_FLAGS_NONE,
1851 NULL, /* TODO: cancellable */
1852 &connection->priv->initialization_error);
1853 if (hello_result == NULL)
1856 g_variant_get (hello_result, "(s)", &s);
1857 connection->priv->bus_unique_name = g_strdup (s);
1858 g_variant_unref (hello_result);
1859 //g_debug ("unique name is `%s'", connection->priv->bus_unique_name);
1862 connection->priv->is_initialized = TRUE;
1868 g_assert (connection->priv->initialization_error != NULL);
1869 g_propagate_error (error, g_error_copy (connection->priv->initialization_error));
1872 g_mutex_unlock (connection->priv->init_lock);
1878 initable_iface_init (GInitableIface *initable_iface)
1880 initable_iface->init = initable_init;
1883 /* ---------------------------------------------------------------------------------------------------- */
1886 async_init_thread (GSimpleAsyncResult *res,
1888 GCancellable *cancellable)
1890 GError *error = NULL;
1892 if (!g_initable_init (G_INITABLE (object), cancellable, &error))
1894 g_simple_async_result_set_from_error (res, error);
1895 g_error_free (error);
1900 async_initable_init_async (GAsyncInitable *initable,
1902 GCancellable *cancellable,
1903 GAsyncReadyCallback callback,
1906 GSimpleAsyncResult *res;
1908 g_return_if_fail (G_IS_INITABLE (initable));
1910 res = g_simple_async_result_new (G_OBJECT (initable), callback, user_data,
1911 async_initable_init_async);
1912 g_simple_async_result_run_in_thread (res, async_init_thread,
1913 io_priority, cancellable);
1914 g_object_unref (res);
1918 async_initable_init_finish (GAsyncInitable *initable,
1922 return TRUE; /* Errors handled by base impl */
1926 async_initable_iface_init (GAsyncInitableIface *async_initable_iface)
1928 /* We basically just want to use GIO's default implementation - though that one is
1929 * unfortunately broken, see #615111. So we copy-paste a fixed-up version.
1931 async_initable_iface->init_async = async_initable_init_async;
1932 async_initable_iface->init_finish = async_initable_init_finish;
1935 /* ---------------------------------------------------------------------------------------------------- */
1938 * g_dbus_connection_new:
1939 * @stream: A #GIOStream.
1940 * @guid: The GUID to use if a authenticating as a server or %NULL.
1941 * @flags: Flags describing how to make the connection.
1942 * @observer: A #GDBusAuthObserver or %NULL.
1943 * @cancellable: A #GCancellable or %NULL.
1944 * @callback: A #GAsyncReadyCallback to call when the request is satisfied.
1945 * @user_data: The data to pass to @callback.
1947 * Asynchronously sets up a D-Bus connection for exchanging D-Bus messages
1948 * with the end represented by @stream.
1950 * If %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER is set in @flags,
1951 * @observer (if not %NULL) is used to assist in the client
1952 * authentication process.
1954 * When the operation is finished, @callback will be invoked. You can
1955 * then call g_dbus_connection_new_finish() to get the result of the
1958 * This is a asynchronous failable constructor. See
1959 * g_dbus_connection_new_sync() for the synchronous
1965 g_dbus_connection_new (GIOStream *stream,
1967 GDBusConnectionFlags flags,
1968 GDBusAuthObserver *observer,
1969 GCancellable *cancellable,
1970 GAsyncReadyCallback callback,
1973 g_return_if_fail (G_IS_IO_STREAM (stream));
1974 g_async_initable_new_async (G_TYPE_DBUS_CONNECTION,
1982 "authentication-observer", observer,
1987 * g_dbus_connection_new_finish:
1988 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_new().
1989 * @error: Return location for error or %NULL.
1991 * Finishes an operation started with g_dbus_connection_new().
1993 * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
1998 g_dbus_connection_new_finish (GAsyncResult *res,
2002 GObject *source_object;
2004 g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
2005 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
2007 source_object = g_async_result_get_source_object (res);
2008 g_assert (source_object != NULL);
2009 object = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object),
2012 g_object_unref (source_object);
2014 return G_DBUS_CONNECTION (object);
2020 * g_dbus_connection_new_sync:
2021 * @stream: A #GIOStream.
2022 * @guid: The GUID to use if a authenticating as a server or %NULL.
2023 * @flags: Flags describing how to make the connection.
2024 * @observer: A #GDBusAuthObserver or %NULL.
2025 * @cancellable: A #GCancellable or %NULL.
2026 * @error: Return location for error or %NULL.
2028 * Synchronously sets up a D-Bus connection for exchanging D-Bus messages
2029 * with the end represented by @stream.
2031 * If %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER is set in @flags,
2032 * @observer (if not %NULL) is used to assist in the client
2033 * authentication process.
2035 * This is a synchronous failable constructor. See
2036 * g_dbus_connection_new() for the asynchronous version.
2038 * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
2043 g_dbus_connection_new_sync (GIOStream *stream,
2045 GDBusConnectionFlags flags,
2046 GDBusAuthObserver *observer,
2047 GCancellable *cancellable,
2050 g_return_val_if_fail (G_IS_IO_STREAM (stream), NULL);
2051 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
2052 return g_initable_new (G_TYPE_DBUS_CONNECTION,
2058 "authentication-observer", observer,
2062 /* ---------------------------------------------------------------------------------------------------- */
2065 * g_dbus_connection_new_for_address:
2066 * @address: A D-Bus address.
2067 * @flags: Flags describing how to make the connection.
2068 * @cancellable: A #GCancellable or %NULL.
2069 * @callback: A #GAsyncReadyCallback to call when the request is satisfied.
2070 * @user_data: The data to pass to @callback.
2072 * Asynchronously connects and sets up a D-Bus client connection for
2073 * exchanging D-Bus messages with an endpoint specified by @address
2074 * which must be in the D-Bus address format.
2076 * This constructor can only be used to initiate client-side
2077 * connections - use g_dbus_connection_new() if you need to act as the
2078 * server. In particular, @flags cannot contain the
2079 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER or
2080 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS flags.
2082 * When the operation is finished, @callback will be invoked. You can
2083 * then call g_dbus_connection_new_finish() to get the result of the
2086 * This is a asynchronous failable constructor. See
2087 * g_dbus_connection_new_for_address_sync() for the synchronous
2093 g_dbus_connection_new_for_address (const gchar *address,
2094 GDBusConnectionFlags flags,
2095 GCancellable *cancellable,
2096 GAsyncReadyCallback callback,
2099 g_return_if_fail (address != NULL);
2100 g_async_initable_new_async (G_TYPE_DBUS_CONNECTION,
2111 * g_dbus_connection_new_for_address_finish:
2112 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_new().
2113 * @error: Return location for error or %NULL.
2115 * Finishes an operation started with g_dbus_connection_new_for_address().
2117 * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
2122 g_dbus_connection_new_for_address_finish (GAsyncResult *res,
2126 GObject *source_object;
2128 g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
2129 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
2131 source_object = g_async_result_get_source_object (res);
2132 g_assert (source_object != NULL);
2133 object = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object),
2136 g_object_unref (source_object);
2138 return G_DBUS_CONNECTION (object);
2144 * g_dbus_connection_new_for_address_sync:
2145 * @address: A D-Bus address.
2146 * @flags: Flags describing how to make the connection.
2147 * @cancellable: A #GCancellable or %NULL.
2148 * @error: Return location for error or %NULL.
2150 * Synchronously connects and sets up a D-Bus client connection for
2151 * exchanging D-Bus messages with an endpoint specified by @address
2152 * which must be in the D-Bus address format.
2154 * This constructor can only be used to initiate client-side
2155 * connections - use g_dbus_connection_new_sync() if you need to act
2156 * as the server. In particular, @flags cannot contain the
2157 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER or
2158 * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS flags.
2160 * This is a synchronous failable constructor. See
2161 * g_dbus_connection_new_for_address() for the asynchronous version.
2163 * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
2168 g_dbus_connection_new_for_address_sync (const gchar *address,
2169 GDBusConnectionFlags flags,
2170 GCancellable *cancellable,
2173 g_return_val_if_fail (address != NULL, NULL);
2174 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
2175 return g_initable_new (G_TYPE_DBUS_CONNECTION,
2183 /* ---------------------------------------------------------------------------------------------------- */
2186 * g_dbus_connection_set_exit_on_close:
2187 * @connection: A #GDBusConnection.
2188 * @exit_on_close: Whether the process should be terminated
2189 * when @connection is closed by the remote peer.
2191 * Sets whether the process should be terminated when @connection is
2192 * closed by the remote peer. See #GDBusConnection:exit-on-close for
2198 g_dbus_connection_set_exit_on_close (GDBusConnection *connection,
2199 gboolean exit_on_close)
2201 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
2202 connection->priv->exit_on_close = exit_on_close;
2206 * g_dbus_connection_get_exit_on_close:
2207 * @connection: A #GDBusConnection.
2209 * Gets whether the process is terminated when @connection is
2210 * closed by the remote peer. See
2211 * #GDBusConnection:exit-on-close for more details.
2213 * Returns: Whether the process is terminated when @connection is
2214 * closed by the remote peer.
2219 g_dbus_connection_get_exit_on_close (GDBusConnection *connection)
2221 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
2222 return connection->priv->exit_on_close;
2226 * g_dbus_connection_get_guid:
2227 * @connection: A #GDBusConnection.
2229 * The GUID of the peer performing the role of server when
2230 * authenticating. See #GDBusConnection:guid for more details.
2232 * Returns: The GUID. Do not free this string, it is owned by
2238 g_dbus_connection_get_guid (GDBusConnection *connection)
2240 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
2241 return connection->priv->guid;
2245 * g_dbus_connection_get_unique_name:
2246 * @connection: A #GDBusConnection.
2248 * Gets the unique name of @connection as assigned by the message
2249 * bus. This can also be used to figure out if @connection is a
2250 * message bus connection.
2252 * Returns: The unique name or %NULL if @connection is not a message
2253 * bus connection. Do not free this string, it is owned by
2259 g_dbus_connection_get_unique_name (GDBusConnection *connection)
2261 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
2262 return connection->priv->bus_unique_name;
2266 * g_dbus_connection_get_peer_credentials:
2267 * @connection: A #GDBusConnection.
2269 * Gets the credentials of the authenticated peer. This will always
2270 * return %NULL unless @connection acted as a server
2271 * (e.g. %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER was passed)
2272 * when set up and the client passed credentials as part of the
2273 * authentication process.
2275 * In a message bus setup, the message bus is always the server and
2276 * each application is a client. So this method will always return
2277 * %NULL for message bus clients.
2279 * Returns: A #GCredentials or %NULL if not available. Do not free
2280 * this object, it is owned by @connection.
2285 g_dbus_connection_get_peer_credentials (GDBusConnection *connection)
2287 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
2288 return connection->priv->crendentials;
2291 /* ---------------------------------------------------------------------------------------------------- */
2293 static guint _global_filter_id = 1;
2296 * g_dbus_connection_add_filter:
2297 * @connection: A #GDBusConnection.
2298 * @filter_function: A filter function.
2299 * @user_data: User data to pass to @filter_function.
2300 * @user_data_free_func: Function to free @user_data with when filter
2301 * is removed or %NULL.
2303 * Adds a message filter. Filters are handlers that are run on all
2304 * incoming messages, prior to standard dispatch. Filters are run in
2305 * the order that they were added. The same handler can be added as a
2306 * filter more than once, in which case it will be run more than once.
2307 * Filters added during a filter callback won't be run on the message
2310 * Note that filters are run in a dedicated message handling thread so
2311 * they can't block and, generally, can't do anything but signal a
2312 * worker thread. Also note that filters are rarely needed - use API
2313 * such as g_dbus_connection_send_message_with_reply(),
2314 * g_dbus_connection_signal_subscribe() or
2315 * g_dbus_connection_call() instead.
2317 * Returns: A filter identifier that can be used with
2318 * g_dbus_connection_remove_filter().
2323 g_dbus_connection_add_filter (GDBusConnection *connection,
2324 GDBusMessageFilterFunction filter_function,
2326 GDestroyNotify user_data_free_func)
2330 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
2331 g_return_val_if_fail (filter_function != NULL, 0);
2333 CONNECTION_LOCK (connection);
2334 data = g_new0 (FilterData, 1);
2335 data->id = _global_filter_id++; /* TODO: overflow etc. */
2336 data->filter_function = filter_function;
2337 data->user_data = user_data;
2338 data->user_data_free_func = user_data_free_func;
2339 g_ptr_array_add (connection->priv->filters, data);
2340 CONNECTION_UNLOCK (connection);
2345 /* only called from finalize(), removes all filters */
2347 purge_all_filters (GDBusConnection *connection)
2350 for (n = 0; n < connection->priv->filters->len; n++)
2352 FilterData *data = connection->priv->filters->pdata[n];
2353 if (data->user_data_free_func != NULL)
2354 data->user_data_free_func (data->user_data);
2360 * g_dbus_connection_remove_filter:
2361 * @connection: a #GDBusConnection
2362 * @filter_id: an identifier obtained from g_dbus_connection_add_filter()
2369 g_dbus_connection_remove_filter (GDBusConnection *connection,
2373 FilterData *to_destroy;
2375 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
2377 CONNECTION_LOCK (connection);
2379 for (n = 0; n < connection->priv->filters->len; n++)
2381 FilterData *data = connection->priv->filters->pdata[n];
2382 if (data->id == filter_id)
2384 g_ptr_array_remove_index (connection->priv->filters, n);
2389 CONNECTION_UNLOCK (connection);
2391 /* do free without holding lock */
2392 if (to_destroy != NULL)
2394 if (to_destroy->user_data_free_func != NULL)
2395 to_destroy->user_data_free_func (to_destroy->user_data);
2396 g_free (to_destroy);
2400 g_warning ("g_dbus_connection_remove_filter: No filter found for filter_id %d", filter_id);
2404 /* ---------------------------------------------------------------------------------------------------- */
2410 gchar *interface_name;
2414 GArray *subscribers;
2419 GDBusSignalCallback callback;
2421 GDestroyNotify user_data_free_func;
2423 GMainContext *context;
2427 signal_data_free (SignalData *data)
2429 g_free (data->rule);
2430 g_free (data->sender);
2431 g_free (data->interface_name);
2432 g_free (data->member);
2433 g_free (data->object_path);
2434 g_free (data->arg0);
2435 g_array_free (data->subscribers, TRUE);
2440 args_to_rule (const gchar *sender,
2441 const gchar *interface_name,
2442 const gchar *member,
2443 const gchar *object_path,
2448 rule = g_string_new ("type='signal'");
2450 g_string_append_printf (rule, ",sender='%s'", sender);
2451 if (interface_name != NULL)
2452 g_string_append_printf (rule, ",interface='%s'", interface_name);
2454 g_string_append_printf (rule, ",member='%s'", member);
2455 if (object_path != NULL)
2456 g_string_append_printf (rule, ",path='%s'", object_path);
2458 g_string_append_printf (rule, ",arg0='%s'", arg0);
2460 return g_string_free (rule, FALSE);
2463 static guint _global_subscriber_id = 1;
2464 static guint _global_registration_id = 1;
2465 static guint _global_subtree_registration_id = 1;
2467 /* ---------------------------------------------------------------------------------------------------- */
2469 /* must hold lock when calling */
2471 add_match_rule (GDBusConnection *connection,
2472 const gchar *match_rule)
2475 GDBusMessage *message;
2477 message = g_dbus_message_new_method_call ("org.freedesktop.DBus", /* name */
2478 "/org/freedesktop/DBus", /* path */
2479 "org.freedesktop.DBus", /* interface */
2481 g_dbus_message_set_body (message, g_variant_new ("(s)", match_rule));
2484 if (!g_dbus_connection_send_message_unlocked (connection,
2489 g_critical ("Error while sending AddMatch() message: %s", error->message);
2490 g_error_free (error);
2492 g_object_unref (message);
2495 /* ---------------------------------------------------------------------------------------------------- */
2497 /* must hold lock when calling */
2499 remove_match_rule (GDBusConnection *connection,
2500 const gchar *match_rule)
2503 GDBusMessage *message;
2505 message = g_dbus_message_new_method_call ("org.freedesktop.DBus", /* name */
2506 "/org/freedesktop/DBus", /* path */
2507 "org.freedesktop.DBus", /* interface */
2509 g_dbus_message_set_body (message, g_variant_new ("(s)", match_rule));
2512 if (!g_dbus_connection_send_message_unlocked (connection,
2517 g_critical ("Error while sending RemoveMatch() message: %s", error->message);
2518 g_error_free (error);
2520 g_object_unref (message);
2523 /* ---------------------------------------------------------------------------------------------------- */
2526 is_signal_data_for_name_lost_or_acquired (SignalData *signal_data)
2528 return g_strcmp0 (signal_data->sender, "org.freedesktop.DBus") == 0 &&
2529 g_strcmp0 (signal_data->interface_name, "org.freedesktop.DBus") == 0 &&
2530 g_strcmp0 (signal_data->object_path, "/org/freedesktop/DBus") == 0 &&
2531 (g_strcmp0 (signal_data->member, "NameLost") == 0 ||
2532 g_strcmp0 (signal_data->member, "NameAcquired") == 0);
2535 /* ---------------------------------------------------------------------------------------------------- */
2538 * g_dbus_connection_signal_subscribe:
2539 * @connection: A #GDBusConnection.
2540 * @sender: Sender name to match on. Must be either <literal>org.freedesktop.DBus</literal> (for listening to signals from the message bus daemon) or a unique name or %NULL to listen from all senders.
2541 * @interface_name: D-Bus interface name to match on or %NULL to match on all interfaces.
2542 * @member: D-Bus signal name to match on or %NULL to match on all signals.
2543 * @object_path: Object path to match on or %NULL to match on all object paths.
2544 * @arg0: Contents of first string argument to match on or %NULL to match on all kinds of arguments.
2545 * @callback: Callback to invoke when there is a signal matching the requested data.
2546 * @user_data: User data to pass to @callback.
2547 * @user_data_free_func: Function to free @user_data with when subscription is removed or %NULL.
2549 * Subscribes to signals on @connection and invokes @callback with a
2550 * whenever the signal is received. Note that @callback
2551 * will be invoked in the <link
2552 * linkend="g-main-context-push-thread-default">thread-default main
2553 * loop</link> of the thread you are calling this method from.
2555 * It is considered a programming error to use this function if @connection is closed.
2557 * Note that if @sender is not <literal>org.freedesktop.DBus</literal> (for listening to signals from the
2558 * message bus daemon), then it needs to be a unique bus name or %NULL (for listening to signals from any
2559 * name) - you cannot pass a name like <literal>com.example.MyApp</literal>.
2560 * Use e.g. g_bus_watch_name() to find the unique name for the owner of the name you are interested in. Also note
2561 * that this function does not remove a subscription if @sender vanishes from the bus. You have to manually
2562 * call g_dbus_connection_signal_unsubscribe() to remove a subscription.
2564 * Returns: A subscription identifier that can be used with g_dbus_connection_signal_unsubscribe().
2569 g_dbus_connection_signal_subscribe (GDBusConnection *connection,
2570 const gchar *sender,
2571 const gchar *interface_name,
2572 const gchar *member,
2573 const gchar *object_path,
2575 GDBusSignalCallback callback,
2577 GDestroyNotify user_data_free_func)
2580 SignalData *signal_data;
2581 SignalSubscriber subscriber;
2582 GPtrArray *signal_data_array;
2584 /* Right now we abort if AddMatch() fails since it can only fail with the bus being in
2585 * an OOM condition. We might want to change that but that would involve making
2586 * g_dbus_connection_signal_subscribe() asynchronous and having the call sites
2587 * handle that. And there's really no sensible way of handling this short of retrying
2588 * to add the match rule... and then there's the little thing that, hey, maybe there's
2589 * a reason the bus in an OOM condition.
2591 * Doable, but not really sure it's worth it...
2594 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
2595 g_return_val_if_fail (!g_dbus_connection_is_closed (connection), 0);
2596 g_return_val_if_fail (sender == NULL || ((strcmp (sender, "org.freedesktop.DBus") == 0 || sender[0] == ':') &&
2597 (connection->priv->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION)), 0);
2598 g_return_val_if_fail (interface_name == NULL || g_dbus_is_interface_name (interface_name), 0);
2599 g_return_val_if_fail (member == NULL || g_dbus_is_member_name (member), 0);
2600 g_return_val_if_fail (object_path == NULL || g_variant_is_object_path (object_path), 0);
2601 g_return_val_if_fail (callback != NULL, 0);
2603 CONNECTION_LOCK (connection);
2605 rule = args_to_rule (sender, interface_name, member, object_path, arg0);
2610 subscriber.callback = callback;
2611 subscriber.user_data = user_data;
2612 subscriber.user_data_free_func = user_data_free_func;
2613 subscriber.id = _global_subscriber_id++; /* TODO: overflow etc. */
2614 subscriber.context = g_main_context_get_thread_default ();
2615 if (subscriber.context != NULL)
2616 g_main_context_ref (subscriber.context);
2618 /* see if we've already have this rule */
2619 signal_data = g_hash_table_lookup (connection->priv->map_rule_to_signal_data, rule);
2620 if (signal_data != NULL)
2622 g_array_append_val (signal_data->subscribers, subscriber);
2627 signal_data = g_new0 (SignalData, 1);
2628 signal_data->rule = rule;
2629 signal_data->sender = g_strdup (sender);
2630 signal_data->interface_name = g_strdup (interface_name);
2631 signal_data->member = g_strdup (member);
2632 signal_data->object_path = g_strdup (object_path);
2633 signal_data->arg0 = g_strdup (arg0);
2634 signal_data->subscribers = g_array_new (FALSE, FALSE, sizeof (SignalSubscriber));
2635 g_array_append_val (signal_data->subscribers, subscriber);
2637 g_hash_table_insert (connection->priv->map_rule_to_signal_data,
2641 /* Add the match rule to the bus...
2643 * Avoid adding match rules for NameLost and NameAcquired messages - the bus will
2644 * always send such messages to us.
2646 if (connection->priv->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION)
2648 if (!is_signal_data_for_name_lost_or_acquired (signal_data))
2649 add_match_rule (connection, signal_data->rule);
2653 g_hash_table_insert (connection->priv->map_id_to_signal_data,
2654 GUINT_TO_POINTER (subscriber.id),
2657 signal_data_array = g_hash_table_lookup (connection->priv->map_sender_to_signal_data_array,
2658 signal_data->sender);
2659 if (signal_data_array == NULL)
2661 signal_data_array = g_ptr_array_new ();
2662 g_hash_table_insert (connection->priv->map_sender_to_signal_data_array,
2663 g_strdup (signal_data->sender),
2666 g_ptr_array_add (signal_data_array, signal_data);
2668 CONNECTION_UNLOCK (connection);
2670 return subscriber.id;
2673 /* ---------------------------------------------------------------------------------------------------- */
2675 /* must hold lock when calling this */
2677 unsubscribe_id_internal (GDBusConnection *connection,
2678 guint subscription_id,
2679 GArray *out_removed_subscribers)
2681 SignalData *signal_data;
2682 GPtrArray *signal_data_array;
2685 signal_data = g_hash_table_lookup (connection->priv->map_id_to_signal_data,
2686 GUINT_TO_POINTER (subscription_id));
2687 if (signal_data == NULL)
2689 /* Don't warn here, we may have thrown all subscriptions out when the connection was closed */
2693 for (n = 0; n < signal_data->subscribers->len; n++)
2695 SignalSubscriber *subscriber;
2697 subscriber = &(g_array_index (signal_data->subscribers, SignalSubscriber, n));
2698 if (subscriber->id != subscription_id)
2701 g_warn_if_fail (g_hash_table_remove (connection->priv->map_id_to_signal_data,
2702 GUINT_TO_POINTER (subscription_id)));
2703 g_array_append_val (out_removed_subscribers, *subscriber);
2704 g_array_remove_index (signal_data->subscribers, n);
2706 if (signal_data->subscribers->len == 0)
2707 g_warn_if_fail (g_hash_table_remove (connection->priv->map_rule_to_signal_data, signal_data->rule));
2709 signal_data_array = g_hash_table_lookup (connection->priv->map_sender_to_signal_data_array,
2710 signal_data->sender);
2711 g_warn_if_fail (signal_data_array != NULL);
2712 g_warn_if_fail (g_ptr_array_remove (signal_data_array, signal_data));
2714 if (signal_data_array->len == 0)
2716 g_warn_if_fail (g_hash_table_remove (connection->priv->map_sender_to_signal_data_array, signal_data->sender));
2718 /* remove the match rule from the bus unless NameLost or NameAcquired (see subscribe()) */
2719 if (connection->priv->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION)
2721 if (!is_signal_data_for_name_lost_or_acquired (signal_data))
2722 remove_match_rule (connection, signal_data->rule);
2725 signal_data_free (signal_data);
2731 g_assert_not_reached ();
2738 * g_dbus_connection_signal_unsubscribe:
2739 * @connection: A #GDBusConnection.
2740 * @subscription_id: A subscription id obtained from g_dbus_connection_signal_subscribe().
2742 * Unsubscribes from signals.
2747 g_dbus_connection_signal_unsubscribe (GDBusConnection *connection,
2748 guint subscription_id)
2750 GArray *subscribers;
2753 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
2755 subscribers = g_array_new (FALSE, FALSE, sizeof (SignalSubscriber));
2757 CONNECTION_LOCK (connection);
2758 unsubscribe_id_internal (connection,
2761 CONNECTION_UNLOCK (connection);
2764 g_assert (subscribers->len == 0 || subscribers->len == 1);
2766 /* call GDestroyNotify without lock held */
2767 for (n = 0; n < subscribers->len; n++)
2769 SignalSubscriber *subscriber;
2770 subscriber = &(g_array_index (subscribers, SignalSubscriber, n));
2771 if (subscriber->user_data_free_func != NULL)
2772 subscriber->user_data_free_func (subscriber->user_data);
2773 if (subscriber->context != NULL)
2774 g_main_context_unref (subscriber->context);
2777 g_array_free (subscribers, TRUE);
2780 /* ---------------------------------------------------------------------------------------------------- */
2784 guint subscription_id;
2785 GDBusSignalCallback callback;
2787 GDBusMessage *message;
2788 GDBusConnection *connection;
2789 const gchar *sender;
2791 const gchar *interface;
2792 const gchar *member;
2795 /* called on delivery thread (e.g. where g_dbus_connection_signal_subscribe() was called) with
2799 emit_signal_instance_in_idle_cb (gpointer data)
2801 SignalInstance *signal_instance = data;
2802 GVariant *parameters;
2803 gboolean has_subscription;
2805 parameters = g_dbus_message_get_body (signal_instance->message);
2806 if (parameters == NULL)
2808 parameters = g_variant_new ("()");
2809 g_variant_ref_sink (parameters);
2813 g_variant_ref_sink (parameters);
2817 g_debug ("in emit_signal_instance_in_idle_cb (sender=%s path=%s interface=%s member=%s params=%s)",
2818 signal_instance->sender,
2819 signal_instance->path,
2820 signal_instance->interface,
2821 signal_instance->member,
2822 g_variant_print (parameters, TRUE));
2825 /* Careful here, don't do the callback if we no longer has the subscription */
2826 CONNECTION_LOCK (signal_instance->connection);
2827 has_subscription = FALSE;
2828 if (g_hash_table_lookup (signal_instance->connection->priv->map_id_to_signal_data,
2829 GUINT_TO_POINTER (signal_instance->subscription_id)) != NULL)
2830 has_subscription = TRUE;
2831 CONNECTION_UNLOCK (signal_instance->connection);
2833 if (has_subscription)
2834 signal_instance->callback (signal_instance->connection,
2835 signal_instance->sender,
2836 signal_instance->path,
2837 signal_instance->interface,
2838 signal_instance->member,
2840 signal_instance->user_data);
2842 if (parameters != NULL)
2843 g_variant_unref (parameters);
2849 signal_instance_free (SignalInstance *signal_instance)
2851 g_object_unref (signal_instance->message);
2852 g_object_unref (signal_instance->connection);
2853 g_free (signal_instance);
2856 /* called in message handler thread WITH lock held */
2858 schedule_callbacks (GDBusConnection *connection,
2859 GPtrArray *signal_data_array,
2860 GDBusMessage *message,
2861 const gchar *sender)
2864 const gchar *interface;
2865 const gchar *member;
2874 interface = g_dbus_message_get_interface (message);
2875 member = g_dbus_message_get_member (message);
2876 path = g_dbus_message_get_path (message);
2877 arg0 = g_dbus_message_get_arg0 (message);
2880 g_debug ("sender = `%s'", sender);
2881 g_debug ("interface = `%s'", interface);
2882 g_debug ("member = `%s'", member);
2883 g_debug ("path = `%s'", path);
2884 g_debug ("arg0 = `%s'", arg0);
2887 /* TODO: if this is slow, then we can change signal_data_array into
2888 * map_object_path_to_signal_data_array or something.
2890 for (n = 0; n < signal_data_array->len; n++)
2892 SignalData *signal_data = signal_data_array->pdata[n];
2894 if (signal_data->interface_name != NULL && g_strcmp0 (signal_data->interface_name, interface) != 0)
2897 if (signal_data->member != NULL && g_strcmp0 (signal_data->member, member) != 0)
2900 if (signal_data->object_path != NULL && g_strcmp0 (signal_data->object_path, path) != 0)
2903 if (signal_data->arg0 != NULL && g_strcmp0 (signal_data->arg0, arg0) != 0)
2906 for (m = 0; m < signal_data->subscribers->len; m++)
2908 SignalSubscriber *subscriber;
2909 GSource *idle_source;
2910 SignalInstance *signal_instance;
2912 subscriber = &(g_array_index (signal_data->subscribers, SignalSubscriber, m));
2914 signal_instance = g_new0 (SignalInstance, 1);
2915 signal_instance->subscription_id = subscriber->id;
2916 signal_instance->callback = subscriber->callback;
2917 signal_instance->user_data = subscriber->user_data;
2918 signal_instance->message = g_object_ref (message);
2919 signal_instance->connection = g_object_ref (connection);
2920 signal_instance->sender = sender;
2921 signal_instance->path = path;
2922 signal_instance->interface = interface;
2923 signal_instance->member = member;
2925 idle_source = g_idle_source_new ();
2926 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
2927 g_source_set_callback (idle_source,
2928 emit_signal_instance_in_idle_cb,
2930 (GDestroyNotify) signal_instance_free);
2931 g_source_attach (idle_source, subscriber->context);
2932 g_source_unref (idle_source);
2937 /* called in message handler thread with lock held */
2939 distribute_signals (GDBusConnection *connection,
2940 GDBusMessage *message)
2942 GPtrArray *signal_data_array;
2943 const gchar *sender;
2945 sender = g_dbus_message_get_sender (message);
2947 /* collect subscribers that match on sender */
2950 signal_data_array = g_hash_table_lookup (connection->priv->map_sender_to_signal_data_array, sender);
2951 if (signal_data_array != NULL)
2952 schedule_callbacks (connection, signal_data_array, message, sender);
2955 /* collect subscribers not matching on sender */
2956 signal_data_array = g_hash_table_lookup (connection->priv->map_sender_to_signal_data_array, "");
2957 if (signal_data_array != NULL)
2958 schedule_callbacks (connection, signal_data_array, message, sender);
2961 /* ---------------------------------------------------------------------------------------------------- */
2963 /* only called from finalize(), removes all subscriptions */
2965 purge_all_signal_subscriptions (GDBusConnection *connection)
2967 GHashTableIter iter;
2970 GArray *subscribers;
2973 ids = g_array_new (FALSE, FALSE, sizeof (guint));
2974 g_hash_table_iter_init (&iter, connection->priv->map_id_to_signal_data);
2975 while (g_hash_table_iter_next (&iter, &key, NULL))
2977 guint subscription_id = GPOINTER_TO_UINT (key);
2978 g_array_append_val (ids, subscription_id);
2981 subscribers = g_array_new (FALSE, FALSE, sizeof (SignalSubscriber));
2982 for (n = 0; n < ids->len; n++)
2984 guint subscription_id = g_array_index (ids, guint, n);
2985 unsubscribe_id_internal (connection,
2989 g_array_free (ids, TRUE);
2991 /* call GDestroyNotify without lock held */
2992 for (n = 0; n < subscribers->len; n++)
2994 SignalSubscriber *subscriber;
2995 subscriber = &(g_array_index (subscribers, SignalSubscriber, n));
2996 if (subscriber->user_data_free_func != NULL)
2997 subscriber->user_data_free_func (subscriber->user_data);
2998 if (subscriber->context != NULL)
2999 g_main_context_unref (subscriber->context);
3002 g_array_free (subscribers, TRUE);
3005 /* ---------------------------------------------------------------------------------------------------- */
3007 struct ExportedObject
3010 GDBusConnection *connection;
3012 /* maps gchar* -> ExportedInterface* */
3013 GHashTable *map_if_name_to_ei;
3016 /* only called with lock held */
3018 exported_object_free (ExportedObject *eo)
3020 g_free (eo->object_path);
3021 g_hash_table_unref (eo->map_if_name_to_ei);
3030 gchar *interface_name;
3031 const GDBusInterfaceVTable *vtable;
3032 const GDBusInterfaceInfo *introspection_data;
3034 GMainContext *context;
3036 GDestroyNotify user_data_free_func;
3037 } ExportedInterface;
3039 /* called with lock held */
3041 exported_interface_free (ExportedInterface *ei)
3043 if (ei->user_data_free_func != NULL)
3044 /* TODO: push to thread-default mainloop */
3045 ei->user_data_free_func (ei->user_data);
3047 if (ei->context != NULL)
3048 g_main_context_unref (ei->context);
3050 g_free (ei->interface_name);
3054 /* ---------------------------------------------------------------------------------------------------- */
3058 GDBusConnection *connection;
3059 GDBusMessage *message;
3061 const char *property_name;
3062 const GDBusInterfaceVTable *vtable;
3063 const GDBusInterfaceInfo *interface_info;
3064 const GDBusPropertyInfo *property_info;
3068 property_data_free (PropertyData *data)
3070 g_object_unref (data->connection);
3071 g_object_unref (data->message);
3075 /* called in thread where object was registered - no locks held */
3077 invoke_get_property_in_idle_cb (gpointer _data)
3079 PropertyData *data = _data;
3082 GDBusMessage *reply;
3085 value = data->vtable->get_property (data->connection,
3086 g_dbus_message_get_sender (data->message),
3087 g_dbus_message_get_path (data->message),
3088 data->interface_info->name,
3089 data->property_name,
3096 g_assert_no_error (error);
3098 g_variant_ref_sink (value);
3099 reply = g_dbus_message_new_method_reply (data->message);
3100 g_dbus_message_set_body (reply, g_variant_new ("(v)", value));
3101 g_dbus_connection_send_message (data->connection, reply, NULL, NULL);
3102 g_variant_unref (value);
3103 g_object_unref (reply);
3107 gchar *dbus_error_name;
3109 g_assert (error != NULL);
3111 dbus_error_name = g_dbus_error_encode_gerror (error);
3112 reply = g_dbus_message_new_method_error_literal (data->message,
3115 g_dbus_connection_send_message (data->connection, reply, NULL, NULL);
3116 g_free (dbus_error_name);
3117 g_error_free (error);
3118 g_object_unref (reply);
3124 /* called in thread where object was registered - no locks held */
3126 invoke_set_property_in_idle_cb (gpointer _data)
3128 PropertyData *data = _data;
3130 GDBusMessage *reply;
3136 g_variant_get (g_dbus_message_get_body (data->message),
3142 /* Fail with org.freedesktop.DBus.Error.InvalidArgs if the type
3143 * of the given value is wrong
3145 if (g_strcmp0 (g_variant_get_type_string (value), data->property_info->signature) != 0)
3147 reply = g_dbus_message_new_method_error (data->message,
3148 "org.freedesktop.DBus.Error.InvalidArgs",
3149 _("Error setting property `%s': Expected type `%s' but got `%s'"),
3150 data->property_info->name,
3151 data->property_info->signature,
3152 g_variant_get_type_string (value));
3156 if (!data->vtable->set_property (data->connection,
3157 g_dbus_message_get_sender (data->message),
3158 g_dbus_message_get_path (data->message),
3159 data->interface_info->name,
3160 data->property_name,
3165 gchar *dbus_error_name;
3166 g_assert (error != NULL);
3167 dbus_error_name = g_dbus_error_encode_gerror (error);
3168 reply = g_dbus_message_new_method_error_literal (data->message,
3171 g_free (dbus_error_name);
3172 g_error_free (error);
3176 reply = g_dbus_message_new_method_reply (data->message);
3180 g_assert (reply != NULL);
3181 g_dbus_connection_send_message (data->connection, reply, NULL, NULL);
3182 g_object_unref (reply);
3187 /* called with lock held */
3189 validate_and_maybe_schedule_property_getset (GDBusConnection *connection,
3190 GDBusMessage *message,
3192 const GDBusInterfaceInfo *introspection_data,
3193 const GDBusInterfaceVTable *vtable,
3194 GMainContext *main_context,
3198 const char *interface_name;
3199 const char *property_name;
3200 const GDBusPropertyInfo *property_info;
3201 GSource *idle_source;
3202 PropertyData *property_data;
3203 GDBusMessage *reply;
3208 g_variant_get (g_dbus_message_get_body (message),
3213 g_variant_get (g_dbus_message_get_body (message),
3222 if (vtable == NULL || vtable->get_property == NULL)
3227 if (vtable == NULL || vtable->set_property == NULL)
3231 /* Check that the property exists - if not fail with org.freedesktop.DBus.Error.InvalidArgs
3233 property_info = NULL;
3235 /* TODO: the cost of this is O(n) - it might be worth caching the result */
3236 property_info = g_dbus_interface_info_lookup_property (introspection_data, property_name);
3237 if (property_info == NULL)
3239 reply = g_dbus_message_new_method_error (message,
3240 "org.freedesktop.DBus.Error.InvalidArgs",
3241 _("No such property `%s'"),
3243 g_dbus_connection_send_message_unlocked (connection, reply, NULL, NULL);
3244 g_object_unref (reply);
3249 if (is_get && !(property_info->flags & G_DBUS_PROPERTY_INFO_FLAGS_READABLE))
3251 reply = g_dbus_message_new_method_error (message,
3252 "org.freedesktop.DBus.Error.InvalidArgs",
3253 _("Property `%s' is not readable"),
3255 g_dbus_connection_send_message_unlocked (connection, reply, NULL, NULL);
3256 g_object_unref (reply);
3260 else if (!is_get && !(property_info->flags & G_DBUS_PROPERTY_INFO_FLAGS_WRITABLE))
3262 reply = g_dbus_message_new_method_error (message,
3263 "org.freedesktop.DBus.Error.InvalidArgs",
3264 _("Property `%s' is not writable"),
3266 g_dbus_connection_send_message_unlocked (connection, reply, NULL, NULL);
3267 g_object_unref (reply);
3272 /* ok, got the property info - call user code in an idle handler */
3273 property_data = g_new0 (PropertyData, 1);
3274 property_data->connection = g_object_ref (connection);
3275 property_data->message = g_object_ref (message);
3276 property_data->user_data = user_data;
3277 property_data->property_name = property_name;
3278 property_data->vtable = vtable;
3279 property_data->interface_info = introspection_data;
3280 property_data->property_info = property_info;
3282 idle_source = g_idle_source_new ();
3283 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
3284 g_source_set_callback (idle_source,
3285 is_get ? invoke_get_property_in_idle_cb : invoke_set_property_in_idle_cb,
3287 (GDestroyNotify) property_data_free);
3288 g_source_attach (idle_source, main_context);
3289 g_source_unref (idle_source);
3297 /* called with lock held */
3299 handle_getset_property (GDBusConnection *connection,
3301 GDBusMessage *message,
3304 ExportedInterface *ei;
3306 const char *interface_name;
3307 const char *property_name;
3312 g_variant_get (g_dbus_message_get_body (message),
3317 g_variant_get (g_dbus_message_get_body (message),
3323 /* Fail with org.freedesktop.DBus.Error.InvalidArgs if there is
3324 * no such interface registered
3326 ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_name);
3329 GDBusMessage *reply;
3330 reply = g_dbus_message_new_method_error (message,
3331 "org.freedesktop.DBus.Error.InvalidArgs",
3332 _("No such interface `%s'"),
3334 g_dbus_connection_send_message_unlocked (eo->connection, reply, NULL, NULL);
3335 g_object_unref (reply);
3340 handled = validate_and_maybe_schedule_property_getset (eo->connection,
3343 ei->introspection_data,
3351 /* ---------------------------------------------------------------------------------------------------- */
3355 GDBusConnection *connection;
3356 GDBusMessage *message;
3358 const GDBusInterfaceVTable *vtable;
3359 const GDBusInterfaceInfo *interface_info;
3360 } PropertyGetAllData;
3363 property_get_all_data_free (PropertyData *data)
3365 g_object_unref (data->connection);
3366 g_object_unref (data->message);
3370 /* called in thread where object was registered - no locks held */
3372 invoke_get_all_properties_in_idle_cb (gpointer _data)
3374 PropertyGetAllData *data = _data;
3375 GVariantBuilder *builder;
3379 GDBusMessage *reply;
3384 /* TODO: Right now we never fail this call - we just omit values if
3385 * a get_property() call is failing.
3387 * We could fail the whole call if just a single get_property() call
3388 * returns an error. We need clarification in the D-Bus spec about this.
3390 builder = g_variant_builder_new (G_VARIANT_TYPE_ARRAY);
3391 for (n = 0; data->interface_info->properties != NULL && data->interface_info->properties[n] != NULL; n++)
3393 const GDBusPropertyInfo *property_info = data->interface_info->properties[n];
3396 if (!(property_info->flags & G_DBUS_PROPERTY_INFO_FLAGS_READABLE))
3399 value = data->vtable->get_property (data->connection,
3400 g_dbus_message_get_sender (data->message),
3401 g_dbus_message_get_path (data->message),
3402 data->interface_info->name,
3403 property_info->name,
3410 g_variant_ref_sink (value);
3411 g_variant_builder_add (builder,
3413 property_info->name,
3415 g_variant_unref (value);
3417 result = g_variant_builder_end (builder);
3419 builder = g_variant_builder_new (G_VARIANT_TYPE_TUPLE);
3420 g_variant_builder_add_value (builder, result); /* steals result since result is floating */
3421 packed = g_variant_builder_end (builder);
3423 reply = g_dbus_message_new_method_reply (data->message);
3424 g_dbus_message_set_body (reply, packed);
3425 g_dbus_connection_send_message (data->connection, reply, NULL, NULL);
3426 g_object_unref (reply);
3431 /* called with lock held */
3433 validate_and_maybe_schedule_property_get_all (GDBusConnection *connection,
3434 GDBusMessage *message,
3435 const GDBusInterfaceInfo *introspection_data,
3436 const GDBusInterfaceVTable *vtable,
3437 GMainContext *main_context,
3441 const char *interface_name;
3442 GSource *idle_source;
3443 PropertyGetAllData *property_get_all_data;
3447 g_variant_get (g_dbus_message_get_body (message),
3451 if (vtable == NULL || vtable->get_property == NULL)
3454 /* ok, got the property info - call user in an idle handler */
3455 property_get_all_data = g_new0 (PropertyGetAllData, 1);
3456 property_get_all_data->connection = g_object_ref (connection);
3457 property_get_all_data->message = g_object_ref (message);
3458 property_get_all_data->user_data = user_data;
3459 property_get_all_data->vtable = vtable;
3460 property_get_all_data->interface_info = introspection_data;
3462 idle_source = g_idle_source_new ();
3463 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
3464 g_source_set_callback (idle_source,
3465 invoke_get_all_properties_in_idle_cb,
3466 property_get_all_data,
3467 (GDestroyNotify) property_get_all_data_free);
3468 g_source_attach (idle_source, main_context);
3469 g_source_unref (idle_source);
3477 /* called with lock held */
3479 handle_get_all_properties (GDBusConnection *connection,
3481 GDBusMessage *message)
3483 ExportedInterface *ei;
3485 const char *interface_name;
3489 g_variant_get (g_dbus_message_get_body (message),
3493 /* Fail with org.freedesktop.DBus.Error.InvalidArgs if there is
3494 * no such interface registered
3496 ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_name);
3499 GDBusMessage *reply;
3500 reply = g_dbus_message_new_method_error (message,
3501 "org.freedesktop.DBus.Error.InvalidArgs",
3502 _("No such interface"),
3504 g_dbus_connection_send_message_unlocked (eo->connection, reply, NULL, NULL);
3505 g_object_unref (reply);
3510 handled = validate_and_maybe_schedule_property_get_all (eo->connection,
3512 ei->introspection_data,
3520 /* ---------------------------------------------------------------------------------------------------- */
3522 static const gchar introspect_header[] =
3523 "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\"\n"
3524 " \"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
3525 "<!-- GDBus " PACKAGE_VERSION " -->\n"
3528 static const gchar introspect_tail[] =
3531 static const gchar introspect_standard_interfaces[] =
3532 " <interface name=\"org.freedesktop.DBus.Properties\">\n"
3533 " <method name=\"Get\">\n"
3534 " <arg type=\"s\" name=\"interface_name\" direction=\"in\"/>\n"
3535 " <arg type=\"s\" name=\"property_name\" direction=\"in\"/>\n"
3536 " <arg type=\"v\" name=\"value\" direction=\"out\"/>\n"
3538 " <method name=\"GetAll\">\n"
3539 " <arg type=\"s\" name=\"interface_name\" direction=\"in\"/>\n"
3540 " <arg type=\"a{sv}\" name=\"properties\" direction=\"out\"/>\n"
3542 " <method name=\"Set\">\n"
3543 " <arg type=\"s\" name=\"interface_name\" direction=\"in\"/>\n"
3544 " <arg type=\"s\" name=\"property_name\" direction=\"in\"/>\n"
3545 " <arg type=\"v\" name=\"value\" direction=\"in\"/>\n"
3547 " <signal name=\"PropertiesChanged\">\n"
3548 " <arg type=\"s\" name=\"interface_name\"/>\n"
3549 " <arg type=\"a{sv}\" name=\"changed_properties\"/>\n"
3552 " <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
3553 " <method name=\"Introspect\">\n"
3554 " <arg type=\"s\" name=\"xml_data\" direction=\"out\"/>\n"
3557 " <interface name=\"org.freedesktop.DBus.Peer\">\n"
3558 " <method name=\"Ping\"/>\n"
3559 " <method name=\"GetMachineId\">\n"
3560 " <arg type=\"s\" name=\"machine_uuid\" direction=\"out\"/>\n"
3565 introspect_append_header (GString *s)
3567 g_string_append (s, introspect_header);
3571 introspect_append_standard_interfaces (GString *s)
3573 g_string_append (s, introspect_standard_interfaces);
3577 maybe_add_path (const gchar *path, gsize path_len, const gchar *object_path, GHashTable *set)
3579 if (g_str_has_prefix (object_path, path) && strlen (object_path) >= path_len)
3585 begin = object_path + path_len;
3586 end = strchr (begin, '/');
3589 s = g_strndup (begin, end - begin);
3591 s = g_strdup (begin);
3593 if (g_hash_table_lookup (set, s) == NULL)
3594 g_hash_table_insert (set, s, GUINT_TO_POINTER (1));
3600 /* TODO: we want a nicer public interface for this */
3602 g_dbus_connection_list_registered_unlocked (GDBusConnection *connection,
3607 GHashTableIter hash_iter;
3608 const gchar *object_path;
3614 CONNECTION_ENSURE_LOCK (connection);
3616 path_len = strlen (path);
3620 set = g_hash_table_new (g_str_hash, g_str_equal);
3622 g_hash_table_iter_init (&hash_iter, connection->priv->map_object_path_to_eo);
3623 while (g_hash_table_iter_next (&hash_iter, (gpointer) &object_path, NULL))
3624 maybe_add_path (path, path_len, object_path, set);
3626 g_hash_table_iter_init (&hash_iter, connection->priv->map_object_path_to_es);
3627 while (g_hash_table_iter_next (&hash_iter, (gpointer) &object_path, NULL))
3628 maybe_add_path (path, path_len, object_path, set);
3630 p = g_ptr_array_new ();
3631 keys = g_hash_table_get_keys (set);
3632 for (l = keys; l != NULL; l = l->next)
3633 g_ptr_array_add (p, l->data);
3634 g_hash_table_unref (set);
3637 g_ptr_array_add (p, NULL);
3638 ret = (gchar **) g_ptr_array_free (p, FALSE);
3643 g_dbus_connection_list_registered (GDBusConnection *connection,
3647 CONNECTION_LOCK (connection);
3648 ret = g_dbus_connection_list_registered_unlocked (connection, path);
3649 CONNECTION_UNLOCK (connection);
3653 /* called in message handler thread with lock held */
3655 handle_introspect (GDBusConnection *connection,
3657 GDBusMessage *message)
3661 GDBusMessage *reply;
3662 GHashTableIter hash_iter;
3663 ExportedInterface *ei;
3666 /* first the header with the standard interfaces */
3667 s = g_string_sized_new (sizeof (introspect_header) +
3668 sizeof (introspect_standard_interfaces) +
3669 sizeof (introspect_tail));
3670 introspect_append_header (s);
3671 introspect_append_standard_interfaces (s);
3673 /* then include the registered interfaces */
3674 g_hash_table_iter_init (&hash_iter, eo->map_if_name_to_ei);
3675 while (g_hash_table_iter_next (&hash_iter, NULL, (gpointer) &ei))
3676 g_dbus_interface_info_generate_xml (ei->introspection_data, 2, s);
3678 /* finally include nodes registered below us */
3679 registered = g_dbus_connection_list_registered_unlocked (connection, eo->object_path);
3680 for (n = 0; registered != NULL && registered[n] != NULL; n++)
3681 g_string_append_printf (s, " <node name=\"%s\"/>\n", registered[n]);
3682 g_strfreev (registered);
3683 g_string_append (s, introspect_tail);
3685 reply = g_dbus_message_new_method_reply (message);
3686 g_dbus_message_set_body (reply, g_variant_new ("(s)", s->str));
3687 g_dbus_connection_send_message_unlocked (connection, reply, NULL, NULL);
3688 g_object_unref (reply);
3689 g_string_free (s, TRUE);
3694 /* called in thread where object was registered - no locks held */
3696 call_in_idle_cb (gpointer user_data)
3698 GDBusMethodInvocation *invocation = G_DBUS_METHOD_INVOCATION (user_data);
3699 GDBusInterfaceVTable *vtable;
3701 vtable = g_object_get_data (G_OBJECT (invocation), "g-dbus-interface-vtable");
3702 g_assert (vtable != NULL && vtable->method_call != NULL);
3704 vtable->method_call (g_dbus_method_invocation_get_connection (invocation),
3705 g_dbus_method_invocation_get_sender (invocation),
3706 g_dbus_method_invocation_get_object_path (invocation),
3707 g_dbus_method_invocation_get_interface_name (invocation),
3708 g_dbus_method_invocation_get_method_name (invocation),
3709 g_dbus_method_invocation_get_parameters (invocation),
3710 g_object_ref (invocation),
3711 g_dbus_method_invocation_get_user_data (invocation));
3716 /* called in message handler thread with lock held */
3718 validate_and_maybe_schedule_method_call (GDBusConnection *connection,
3719 GDBusMessage *message,
3720 const GDBusInterfaceInfo *introspection_data,
3721 const GDBusInterfaceVTable *vtable,
3722 GMainContext *main_context,
3725 GDBusMethodInvocation *invocation;
3726 const GDBusMethodInfo *method_info;
3727 GDBusMessage *reply;
3728 GVariant *parameters;
3729 GSource *idle_source;
3731 gchar *in_signature;
3735 /* TODO: the cost of this is O(n) - it might be worth caching the result */
3736 method_info = g_dbus_interface_info_lookup_method (introspection_data, g_dbus_message_get_member (message));
3738 /* if the method doesn't exist, return the org.freedesktop.DBus.Error.UnknownMethod
3739 * error to the caller
3741 if (method_info == NULL)
3743 reply = g_dbus_message_new_method_error (message,
3744 "org.freedesktop.DBus.Error.UnknownMethod",
3745 _("No such method `%s'"),
3746 g_dbus_message_get_member (message));
3747 g_dbus_connection_send_message_unlocked (connection, reply, NULL, NULL);
3748 g_object_unref (reply);
3753 /* Check that the incoming args are of the right type - if they are not, return
3754 * the org.freedesktop.DBus.Error.InvalidArgs error to the caller
3756 * TODO: might also be worth caching the combined signature.
3758 in_signature = _g_dbus_compute_complete_signature (method_info->in_args, FALSE);
3759 if (g_strcmp0 (g_dbus_message_get_signature (message), in_signature) != 0)
3761 reply = g_dbus_message_new_method_error (message,
3762 "org.freedesktop.DBus.Error.InvalidArgs",
3763 _("Signature of message, `%s', does not match expected signature `%s'"),
3764 g_dbus_message_get_signature (message),
3766 g_dbus_connection_send_message_unlocked (connection, reply, NULL, NULL);
3767 g_object_unref (reply);
3768 g_free (in_signature);
3772 g_free (in_signature);
3774 parameters = g_dbus_message_get_body (message);
3775 if (parameters == NULL)
3777 parameters = g_variant_new ("()");
3778 g_variant_ref_sink (parameters);
3782 g_variant_ref (parameters);
3785 /* schedule the call in idle */
3786 invocation = g_dbus_method_invocation_new (g_dbus_message_get_sender (message),
3787 g_dbus_message_get_path (message),
3788 g_dbus_message_get_interface (message),
3789 g_dbus_message_get_member (message),
3795 g_variant_unref (parameters);
3796 g_object_set_data (G_OBJECT (invocation),
3797 "g-dbus-interface-vtable",
3800 idle_source = g_idle_source_new ();
3801 g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
3802 g_source_set_callback (idle_source,
3806 g_source_attach (idle_source, main_context);
3807 g_source_unref (idle_source);
3815 /* ---------------------------------------------------------------------------------------------------- */
3817 /* called in message handler thread with lock held */
3819 obj_message_func (GDBusConnection *connection,
3821 GDBusMessage *message)
3823 const gchar *interface_name;
3824 const gchar *member;
3825 const gchar *signature;
3830 interface_name = g_dbus_message_get_interface (message);
3831 member = g_dbus_message_get_member (message);
3832 signature = g_dbus_message_get_signature (message);
3834 /* see if we have an interface for handling this call */
3835 if (interface_name != NULL)
3837 ExportedInterface *ei;
3838 ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_name);
3841 /* we do - invoke the handler in idle in the right thread */
3843 /* handle no vtable or handler being present */
3844 if (ei->vtable == NULL || ei->vtable->method_call == NULL)
3847 handled = validate_and_maybe_schedule_method_call (connection,
3849 ei->introspection_data,
3857 if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Introspectable") == 0 &&
3858 g_strcmp0 (member, "Introspect") == 0 &&
3859 g_strcmp0 (signature, "") == 0)
3861 handled = handle_introspect (connection, eo, message);
3864 else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0 &&
3865 g_strcmp0 (member, "Get") == 0 &&
3866 g_strcmp0 (signature, "ss") == 0)
3868 handled = handle_getset_property (connection, eo, message, TRUE);
3871 else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0 &&
3872 g_strcmp0 (member, "Set") == 0 &&
3873 g_strcmp0 (signature, "ssv") == 0)
3875 handled = handle_getset_property (connection, eo, message, FALSE);
3878 else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0 &&
3879 g_strcmp0 (member, "GetAll") == 0 &&
3880 g_strcmp0 (signature, "s") == 0)
3882 handled = handle_get_all_properties (connection, eo, message);
3891 * g_dbus_connection_register_object:
3892 * @connection: A #GDBusConnection.
3893 * @object_path: The object path to register at.
3894 * @interface_name: The D-Bus interface to register.
3895 * @introspection_data: Introspection data for the interface.
3896 * @vtable: A #GDBusInterfaceVTable to call into or %NULL.
3897 * @user_data: Data to pass to functions in @vtable.
3898 * @user_data_free_func: Function to call when the object path is unregistered.
3899 * @error: Return location for error or %NULL.
3901 * Registers callbacks for exported objects at @object_path with the
3902 * D-Bus interface @interface_name.
3904 * Calls to functions in @vtable (and @user_data_free_func) will
3905 * happen in the <link linkend="g-main-context-push-thread-default">thread-default main
3906 * loop</link> of the thread you are calling this method from.
3908 * Note that all #GVariant values passed to functions in @vtable will match
3909 * the signature given in @introspection_data - if a remote caller passes
3910 * incorrect values, the <literal>org.freedesktop.DBus.Error.InvalidArgs</literal>
3911 * is returned to the remote caller.
3913 * Additionally, if the remote caller attempts to invoke methods or
3914 * access properties not mentioned in @introspection_data the
3915 * <literal>org.freedesktop.DBus.Error.UnknownMethod</literal> resp.
3916 * <literal>org.freedesktop.DBus.Error.InvalidArgs</literal> errors
3917 * are returned to the caller.
3919 * It is considered a programming error if the
3920 * #GDBusInterfaceGetPropertyFunc function in @vtable returns a
3921 * #GVariant of incorrect type.
3923 * If an existing callback is already registered at @object_path and
3924 * @interface_name, then @error is set to #G_IO_ERROR_EXISTS.
3926 * See <xref linkend="gdbus-server"/> for an example of how to use this method.
3928 * Returns: 0 if @error is set, otherwise a registration id (never 0)
3929 * that can be used with g_dbus_connection_unregister_object() .
3934 g_dbus_connection_register_object (GDBusConnection *connection,
3935 const gchar *object_path,
3936 const gchar *interface_name,
3937 const GDBusInterfaceInfo *introspection_data,
3938 const GDBusInterfaceVTable *vtable,
3940 GDestroyNotify user_data_free_func,
3944 ExportedInterface *ei;
3947 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
3948 g_return_val_if_fail (!g_dbus_connection_is_closed (connection), 0);
3949 g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), 0);
3950 g_return_val_if_fail (interface_name == NULL || g_dbus_is_interface_name (interface_name), 0);
3951 g_return_val_if_fail (introspection_data != NULL, 0);
3952 g_return_val_if_fail (error == NULL || *error == NULL, 0);
3956 CONNECTION_LOCK (connection);
3958 eo = g_hash_table_lookup (connection->priv->map_object_path_to_eo, object_path);
3961 eo = g_new0 (ExportedObject, 1);
3962 eo->object_path = g_strdup (object_path);
3963 eo->connection = connection;
3964 eo->map_if_name_to_ei = g_hash_table_new_full (g_str_hash,
3967 (GDestroyNotify) exported_interface_free);
3968 g_hash_table_insert (connection->priv->map_object_path_to_eo, eo->object_path, eo);
3971 ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_name);
3977 _("An object is already exported for the interface %s at %s"),
3983 ei = g_new0 (ExportedInterface, 1);
3984 ei->id = _global_registration_id++; /* TODO: overflow etc. */
3986 ei->user_data = user_data;
3987 ei->user_data_free_func = user_data_free_func;
3988 ei->vtable = vtable;
3989 ei->introspection_data = introspection_data;
3990 ei->interface_name = g_strdup (interface_name);
3991 ei->context = g_main_context_get_thread_default ();
3992 if (ei->context != NULL)
3993 g_main_context_ref (ei->context);
3995 g_hash_table_insert (eo->map_if_name_to_ei,
3996 (gpointer) ei->interface_name,
3998 g_hash_table_insert (connection->priv->map_id_to_ei,
3999 GUINT_TO_POINTER (ei->id),
4005 CONNECTION_UNLOCK (connection);
4011 * g_dbus_connection_unregister_object:
4012 * @connection: A #GDBusConnection.
4013 * @registration_id: A registration id obtained from g_dbus_connection_register_object().
4015 * Unregisters an object.
4017 * Returns: %TRUE if the object was unregistered, %FALSE otherwise.
4022 g_dbus_connection_unregister_object (GDBusConnection *connection,
4023 guint registration_id)
4025 ExportedInterface *ei;
4029 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
4033 CONNECTION_LOCK (connection);
4035 ei = g_hash_table_lookup (connection->priv->map_id_to_ei,
4036 GUINT_TO_POINTER (registration_id));
4042 g_warn_if_fail (g_hash_table_remove (connection->priv->map_id_to_ei, GUINT_TO_POINTER (ei->id)));
4043 g_warn_if_fail (g_hash_table_remove (eo->map_if_name_to_ei, ei->interface_name));
4044 /* unregister object path if we have no more exported interfaces */
4045 if (g_hash_table_size (eo->map_if_name_to_ei) == 0)
4046 g_warn_if_fail (g_hash_table_remove (connection->priv->map_object_path_to_eo,
4052 CONNECTION_UNLOCK (connection);
4057 /* ---------------------------------------------------------------------------------------------------- */
4060 * g_dbus_connection_emit_signal:
4061 * @connection: A #GDBusConnection.
4062 * @destination_bus_name: The unique bus name for the destination for the signal or %NULL to emit to all listeners.
4063 * @object_path: Path of remote object.
4064 * @interface_name: D-Bus interface to emit a signal on.
4065 * @signal_name: The name of the signal to emit.
4066 * @parameters: A #GVariant tuple with parameters for the signal or %NULL if not passing parameters.
4067 * @error: Return location for error or %NULL.
4071 * This can only fail if @parameters is not compatible with the D-Bus protocol.
4073 * Returns: %TRUE unless @error is set.
4078 g_dbus_connection_emit_signal (GDBusConnection *connection,
4079 const gchar *destination_bus_name,
4080 const gchar *object_path,
4081 const gchar *interface_name,
4082 const gchar *signal_name,
4083 GVariant *parameters,
4086 GDBusMessage *message;
4092 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
4093 g_return_val_if_fail (destination_bus_name == NULL || g_dbus_is_name (destination_bus_name), FALSE);
4094 g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), FALSE);
4095 g_return_val_if_fail (interface_name != NULL && g_dbus_is_interface_name (interface_name), FALSE);
4096 g_return_val_if_fail (signal_name != NULL && g_dbus_is_member_name (signal_name), FALSE);
4097 g_return_val_if_fail (parameters == NULL || g_variant_is_of_type (parameters, G_VARIANT_TYPE_TUPLE), FALSE);
4099 message = g_dbus_message_new_signal (object_path,
4103 if (destination_bus_name != NULL)
4104 g_dbus_message_set_header (message,
4105 G_DBUS_MESSAGE_HEADER_FIELD_DESTINATION,
4106 g_variant_new_string (destination_bus_name));
4108 if (parameters != NULL)
4109 g_dbus_message_set_body (message, parameters);
4111 ret = g_dbus_connection_send_message (connection, message, NULL, error);
4112 g_object_unref (message);
4118 add_call_flags (GDBusMessage *message,
4119 GDBusCallFlags flags)
4121 if (flags & G_DBUS_CALL_FLAGS_NO_AUTO_START)
4122 g_dbus_message_set_flags (message, G_DBUS_MESSAGE_FLAGS_NO_AUTO_START);
4126 * g_dbus_connection_call:
4127 * @connection: A #GDBusConnection.
4128 * @bus_name: A unique or well-known bus name or %NULL if @connection is not a message bus connection.
4129 * @object_path: Path of remote object.
4130 * @interface_name: D-Bus interface to invoke method on.
4131 * @method_name: The name of the method to invoke.
4132 * @parameters: A #GVariant tuple with parameters for the method or %NULL if not passing parameters.
4133 * @flags: Flags from the #GDBusCallFlags enumeration.
4134 * @timeout_msec: The timeout in milliseconds or -1 to use the default timeout.
4135 * @cancellable: A #GCancellable or %NULL.
4136 * @callback: A #GAsyncReadyCallback to call when the request is satisfied or %NULL if you don't
4137 * care about the result of the method invocation.
4138 * @user_data: The data to pass to @callback.
4140 * Asynchronously invokes the @method_name method on the
4141 * @interface_name D-Bus interface on the remote object at
4142 * @object_path owned by @bus_name.
4144 * If @connection is closed then the operation will fail with
4145 * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the operation will
4146 * fail with %G_IO_ERROR_CANCELLED. If @parameters contains a value
4147 * not compatible with the D-Bus protocol, the operation fails with
4148 * %G_IO_ERROR_INVALID_ARGUMENT.
4150 * If the @parameters #GVariant is floating, it is consumed. This allows
4151 * convenient 'inline' use of g_variant_new(), e.g.:
4153 * g_dbus_connection_call (connection,
4154 * "org.freedesktop.StringThings",
4155 * "/org/freedesktop/StringThings",
4156 * "org.freedesktop.StringThings",
4158 * g_variant_new ("(ss)",
4161 * G_DBUS_CALL_FLAGS_NONE,
4164 * (GAsyncReadyCallback) two_strings_done,
4168 * This is an asynchronous method. When the operation is finished, @callback will be invoked
4169 * in the <link linkend="g-main-context-push-thread-default">thread-default main loop</link>
4170 * of the thread you are calling this method from. You can then call
4171 * g_dbus_connection_call_finish() to get the result of the operation.
4172 * See g_dbus_connection_call_sync() for the synchronous version of this
4178 g_dbus_connection_call (GDBusConnection *connection,
4179 const gchar *bus_name,
4180 const gchar *object_path,
4181 const gchar *interface_name,
4182 const gchar *method_name,
4183 GVariant *parameters,
4184 GDBusCallFlags flags,
4186 GCancellable *cancellable,
4187 GAsyncReadyCallback callback,
4190 GDBusMessage *message;
4192 g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
4193 g_return_if_fail (bus_name == NULL || g_dbus_is_name (bus_name));
4194 g_return_if_fail (object_path != NULL && g_variant_is_object_path (object_path));
4195 g_return_if_fail (interface_name != NULL && g_dbus_is_interface_name (interface_name));
4196 g_return_if_fail (method_name != NULL && g_dbus_is_member_name (method_name));
4197 g_return_if_fail (timeout_msec >= 0 || timeout_msec == -1);
4198 g_return_if_fail ((parameters == NULL) || g_variant_is_of_type (parameters, G_VARIANT_TYPE_TUPLE));
4200 message = g_dbus_message_new_method_call (bus_name,
4204 add_call_flags (message, flags);
4205 if (parameters != NULL)
4206 g_dbus_message_set_body (message, parameters);
4208 g_dbus_connection_send_message_with_reply (connection,
4211 NULL, /* volatile guint32 *out_serial */
4216 if (message != NULL)
4217 g_object_unref (message);
4221 decode_method_reply (GDBusMessage *reply,
4227 switch (g_dbus_message_get_message_type (reply))
4229 case G_DBUS_MESSAGE_TYPE_METHOD_RETURN:
4230 result = g_dbus_message_get_body (reply);
4233 result = g_variant_new ("()");
4234 g_variant_ref_sink (result);
4238 g_variant_ref (result);
4242 case G_DBUS_MESSAGE_TYPE_ERROR:
4243 g_dbus_message_to_gerror (reply, error);
4247 g_assert_not_reached ();
4255 * g_dbus_connection_call_finish:
4256 * @connection: A #GDBusConnection.
4257 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_call().
4258 * @error: Return location for error or %NULL.
4260 * Finishes an operation started with g_dbus_connection_call().
4262 * Returns: %NULL if @error is set. Otherwise a #GVariant tuple with
4263 * return values. Free with g_variant_unref().
4268 g_dbus_connection_call_finish (GDBusConnection *connection,
4272 GDBusMessage *reply;
4275 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
4276 g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
4277 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
4281 reply = g_dbus_connection_send_message_with_reply_finish (connection, res, error);
4285 result = decode_method_reply (reply, error);
4287 g_object_unref (reply);
4293 /* ---------------------------------------------------------------------------------------------------- */
4296 * g_dbus_connection_call_sync:
4297 * @connection: A #GDBusConnection.
4298 * @bus_name: A unique or well-known bus name.
4299 * @object_path: Path of remote object.
4300 * @interface_name: D-Bus interface to invoke method on.
4301 * @method_name: The name of the method to invoke.
4302 * @parameters: A #GVariant tuple with parameters for the method or %NULL if not passing parameters.
4303 * @flags: Flags from the #GDBusCallFlags enumeration.
4304 * @timeout_msec: The timeout in milliseconds or -1 to use the default timeout.
4305 * @cancellable: A #GCancellable or %NULL.
4306 * @error: Return location for error or %NULL.
4308 * Synchronously invokes the @method_name method on the
4309 * @interface_name D-Bus interface on the remote object at
4310 * @object_path owned by @bus_name.
4312 * If @connection is closed then the operation will fail with
4313 * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the
4314 * operation will fail with %G_IO_ERROR_CANCELLED. If @parameters
4315 * contains a value not compatible with the D-Bus protocol, the operation
4316 * fails with %G_IO_ERROR_INVALID_ARGUMENT.
4318 * If the @parameters #GVariant is floating, it is consumed.
4319 * This allows convenient 'inline' use of g_variant_new(), e.g.:
4321 * g_dbus_connection_call_sync (connection,
4322 * "org.freedesktop.StringThings",
4323 * "/org/freedesktop/StringThings",
4324 * "org.freedesktop.StringThings",
4326 * g_variant_new ("(ss)",
4329 * G_DBUS_CALL_FLAGS_NONE,
4335 * The calling thread is blocked until a reply is received. See
4336 * g_dbus_connection_call() for the asynchronous version of
4339 * Returns: %NULL if @error is set. Otherwise a #GVariant tuple with
4340 * return values. Free with g_variant_unref().
4345 g_dbus_connection_call_sync (GDBusConnection *connection,
4346 const gchar *bus_name,
4347 const gchar *object_path,
4348 const gchar *interface_name,
4349 const gchar *method_name,
4350 GVariant *parameters,
4351 GDBusCallFlags flags,
4353 GCancellable *cancellable,
4356 GDBusMessage *message;
4357 GDBusMessage *reply;
4364 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
4365 g_return_val_if_fail (bus_name == NULL || g_dbus_is_name (bus_name), NULL);
4366 g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), NULL);
4367 g_return_val_if_fail (interface_name != NULL && g_dbus_is_interface_name (interface_name), NULL);
4368 g_return_val_if_fail (method_name != NULL && g_dbus_is_member_name (method_name), NULL);
4369 g_return_val_if_fail (timeout_msec >= 0 || timeout_msec == -1, NULL);
4370 g_return_val_if_fail ((parameters == NULL) || g_variant_is_of_type (parameters, G_VARIANT_TYPE_TUPLE), NULL);
4372 message = g_dbus_message_new_method_call (bus_name,
4376 add_call_flags (message, flags);
4377 if (parameters != NULL)
4378 g_dbus_message_set_body (message, parameters);
4380 reply = g_dbus_connection_send_message_with_reply_sync (connection,
4383 NULL, /* volatile guint32 *out_serial */
4390 result = decode_method_reply (reply, error);
4393 if (message != NULL)
4394 g_object_unref (message);
4396 g_object_unref (reply);
4401 /* ---------------------------------------------------------------------------------------------------- */
4403 struct ExportedSubtree
4407 GDBusConnection *connection;
4408 const GDBusSubtreeVTable *vtable;
4409 GDBusSubtreeFlags flags;
4411 GMainContext *context;
4413 GDestroyNotify user_data_free_func;
4417 exported_subtree_free (ExportedSubtree *es)
4419 if (es->user_data_free_func != NULL)
4420 /* TODO: push to thread-default mainloop */
4421 es->user_data_free_func (es->user_data);
4423 if (es->context != NULL)
4424 g_main_context_unref (es->context);
4426 g_free (es->object_path);
4430 /* called without lock held */
4432 handle_subtree_introspect (GDBusConnection *connection,
4433 ExportedSubtree *es,
4434 GDBusMessage *message)
4438 GDBusMessage *reply;
4441 const gchar *sender;
4442 const gchar *requested_object_path;
4443 const gchar *requested_node;
4444 GPtrArray *interfaces;
4446 gchar **subnode_paths;
4450 requested_object_path = g_dbus_message_get_path (message);
4451 sender = g_dbus_message_get_sender (message);
4452 is_root = (g_strcmp0 (requested_object_path, es->object_path) == 0);
4454 s = g_string_new (NULL);
4455 introspect_append_header (s);
4457 /* Strictly we don't need the children in dynamic mode, but we avoid the
4458 * conditionals to preserve code clarity
4460 children = es->vtable->enumerate (es->connection,
4467 requested_node = strrchr (requested_object_path, '/') + 1;
4469 /* Assert existence of object if we are not dynamic */
4470 if (!(es->flags & G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES) &&
4471 !_g_strv_has_string ((const gchar * const *) children, requested_node))
4476 requested_node = "/";
4479 interfaces = es->vtable->introspect (es->connection,
4484 if (interfaces != NULL)
4486 if (interfaces->len > 0)
4488 /* we're in business */
4489 introspect_append_standard_interfaces (s);
4491 for (n = 0; n < interfaces->len; n++)
4493 const GDBusInterfaceInfo *interface_info = interfaces->pdata[n];
4494 g_dbus_interface_info_generate_xml (interface_info, 2, s);
4497 g_ptr_array_unref (interfaces);
4500 /* then include <node> entries from the Subtree for the root */
4503 for (n = 0; children != NULL && children[n] != NULL; n++)
4504 g_string_append_printf (s, " <node name=\"%s\"/>\n", children[n]);
4507 /* finally include nodes registered below us */
4508 subnode_paths = g_dbus_connection_list_registered (es->connection, requested_object_path);
4509 for (n = 0; subnode_paths != NULL && subnode_paths[n] != NULL; n++)
4510 g_string_append_printf (s, " <node name=\"%s\"/>\n", subnode_paths[n]);
4511 g_strfreev (subnode_paths);
4513 g_string_append (s, "</node>\n");
4515 reply = g_dbus_message_new_method_reply (message);
4516 g_dbus_message_set_body (reply, g_variant_new ("(s)", s->str));
4517 g_dbus_connection_send_message (connection, reply, NULL, NULL);
4518 g_object_unref (reply);
4523 g_string_free (s, TRUE);
4524 g_strfreev (children);
4528 /* called without lock held */
4530 handle_subtree_method_invocation (GDBusConnection *connection,
4531 ExportedSubtree *es,
4532 GDBusMessage *message)
4535 const gchar *sender;
4536 const gchar *interface_name;
4537 const gchar *member;
4538 const gchar *signature;
4539 const gchar *requested_object_path;
4540 const gchar *requested_node;
4543 const GDBusInterfaceInfo *introspection_data;
4544 const GDBusInterfaceVTable *interface_vtable;
4545 gpointer interface_user_data;
4547 GPtrArray *interfaces;
4548 gboolean is_property_get;
4549 gboolean is_property_set;
4550 gboolean is_property_get_all;
4555 requested_object_path = g_dbus_message_get_path (message);
4556 sender = g_dbus_message_get_sender (message);
4557 interface_name = g_dbus_message_get_interface (message);
4558 member = g_dbus_message_get_member (message);
4559 signature = g_dbus_message_get_signature (message);
4560 is_root = (g_strcmp0 (requested_object_path, es->object_path) == 0);
4562 is_property_get = FALSE;
4563 is_property_set = FALSE;
4564 is_property_get_all = FALSE;
4565 if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0)
4567 if (g_strcmp0 (member, "Get") == 0 && g_strcmp0 (signature, "ss") == 0)
4568 is_property_get = TRUE;
4569 else if (g_strcmp0 (member, "Set") == 0 && g_strcmp0 (signature, "ssv") == 0)
4570 is_property_set = TRUE;
4571 else if (g_strcmp0 (member, "GetAll") == 0 && g_strcmp0 (signature, "s") == 0)
4572 is_property_get_all = TRUE;
4575 children = es->vtable->enumerate (es->connection,
4582 requested_node = strrchr (requested_object_path, '/') + 1;
4584 /* If not dynamic, skip if requested node is not part of children */
4585 if (!(es->flags & G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES) &&
4586 !_g_strv_has_string ((const gchar * const *) children, requested_node))
4591 requested_node = "/";
4594 /* get introspection data for the node */
4595 interfaces = es->vtable->introspect (es->connection,
4597 requested_object_path,
4600 g_assert (interfaces != NULL);
4601 introspection_data = NULL;
4602 for (n = 0; n < interfaces->len; n++)
4604 const GDBusInterfaceInfo *id_n = (const GDBusInterfaceInfo *) interfaces->pdata[n];
4605 if (g_strcmp0 (id_n->name, interface_name) == 0)
4606 introspection_data = id_n;
4609 /* dispatch the call if the user wants to handle it */
4610 if (introspection_data != NULL)
4612 /* figure out where to dispatch the method call */
4613 interface_user_data = NULL;
4614 interface_vtable = es->vtable->dispatch (es->connection,
4619 &interface_user_data,
4621 if (interface_vtable == NULL)
4624 CONNECTION_LOCK (connection);
4625 handled = validate_and_maybe_schedule_method_call (es->connection,
4630 interface_user_data);
4631 CONNECTION_UNLOCK (connection);
4633 /* handle org.freedesktop.DBus.Properties interface if not explicitly handled */
4634 else if (is_property_get || is_property_set || is_property_get_all)
4636 if (is_property_get)
4637 g_variant_get (g_dbus_message_get_body (message), "(ss)", &interface_name, NULL);
4638 else if (is_property_set)
4639 g_variant_get (g_dbus_message_get_body (message), "(ssv)", &interface_name, NULL, NULL);
4640 else if (is_property_get_all)
4641 g_variant_get (g_dbus_message_get_body (message), "(s)", &interface_name, NULL, NULL);
4643 g_assert_not_reached ();
4645 /* see if the object supports this interface at all */
4646 for (n = 0; n < interfaces->len; n++)
4648 const GDBusInterfaceInfo *id_n = (const GDBusInterfaceInfo *) interfaces->pdata[n];
4649 if (g_strcmp0 (id_n->name, interface_name) == 0)
4650 introspection_data = id_n;
4653 /* Fail with org.freedesktop.DBus.Error.InvalidArgs if the user-code
4654 * claims it won't support the interface
4656 if (introspection_data == NULL)
4658 GDBusMessage *reply;
4659 reply = g_dbus_message_new_method_error (message,
4660 "org.freedesktop.DBus.Error.InvalidArgs",
4661 _("No such interface `%s'"),
4663 g_dbus_connection_send_message (es->connection, reply, NULL, NULL);
4664 g_object_unref (reply);
4669 /* figure out where to dispatch the property get/set/getall calls */
4670 interface_user_data = NULL;
4671 interface_vtable = es->vtable->dispatch (es->connection,
4676 &interface_user_data,
4678 if (interface_vtable == NULL)
4681 if (is_property_get || is_property_set)
4683 CONNECTION_LOCK (connection);
4684 handled = validate_and_maybe_schedule_property_getset (es->connection,
4690 interface_user_data);
4691 CONNECTION_UNLOCK (connection);
4693 else if (is_property_get_all)
4695 CONNECTION_LOCK (connection);
4696 handled = validate_and_maybe_schedule_property_get_all (es->connection,
4701 interface_user_data);
4702 CONNECTION_UNLOCK (connection);
4707 if (interfaces != NULL)
4708 g_ptr_array_unref (interfaces);
4709 g_strfreev (children);
4715 GDBusMessage *message;
4716 ExportedSubtree *es;
4717 } SubtreeDeferredData;
4720 subtree_deferred_data_free (SubtreeDeferredData *data)
4722 g_object_unref (data->message);
4726 /* called without lock held in the thread where the caller registered the subtree */
4728 process_subtree_vtable_message_in_idle_cb (gpointer _data)
4730 SubtreeDeferredData *data = _data;
4735 if (g_strcmp0 (g_dbus_message_get_interface (data->message), "org.freedesktop.DBus.Introspectable") == 0 &&
4736 g_strcmp0 (g_dbus_message_get_member (data->message), "Introspect") == 0 &&
4737 g_strcmp0 (g_dbus_message_get_signature (data->message), "") == 0)
4738 handled = handle_subtree_introspect (data->es->connection,
4742 handled = handle_subtree_method_invocation (data->es->connection,
4748 CONNECTION_LOCK (data->es->connection);
4749 handled = handle_generic_unlocked (data->es->connection, data->message);
4750 CONNECTION_UNLOCK (data->es->connection);
4753 /* if we couldn't handle the request, just bail with the UnknownMethod error */
4756 GDBusMessage *reply;
4757 reply = g_dbus_message_new_method_error (data->message,
4758 "org.freedesktop.DBus.Error.UnknownMethod",
4759 _("Method `%s' on interface `%s' with signature `%s' does not exist"),
4760 g_dbus_message_get_member (data->message),
4761 g_dbus_message_get_interface (data->message),
4762 g_dbus_message_get_signature (data->message));
4763 g_dbus_connection_send_message (data->es->connection, reply, NULL, NULL);
4764 g_object_unref (reply);
4770 /* called in message handler thread with lock held */
4772 subtree_message_func (GDBusConnection *connection,
4773 ExportedSubtree *es,
4774 GDBusMessage *message)
4776 GSource *idle_source;
4777 SubtreeDeferredData *data;
4779 data = g_new0 (SubtreeDeferredData, 1);
4780 data->message = g_object_ref (message);
4783 /* defer this call to an idle handler in the right thread */
4784 idle_source = g_idle_source_new ();
4785 g_source_set_priority (idle_source, G_PRIORITY_HIGH);
4786 g_source_set_callback (idle_source,
4787 process_subtree_vtable_message_in_idle_cb,
4789 (GDestroyNotify) subtree_deferred_data_free);
4790 g_source_attach (idle_source, es->context);
4791 g_source_unref (idle_source);
4793 /* since we own the entire subtree, handlers for objects not in the subtree have been
4794 * tried already by libdbus-1 - so we just need to ensure that we're always going
4795 * to reply to the message
4801 * g_dbus_connection_register_subtree:
4802 * @connection: A #GDBusConnection.
4803 * @object_path: The object path to register the subtree at.
4804 * @vtable: A #GDBusSubtreeVTable to enumerate, introspect and dispatch nodes in the subtree.
4805 * @flags: Flags used to fine tune the behavior of the subtree.
4806 * @user_data: Data to pass to functions in @vtable.
4807 * @user_data_free_func: Function to call when the subtree is unregistered.
4808 * @error: Return location for error or %NULL.
4810 * Registers a whole subtree of <quote>dynamic</quote> objects.
4812 * The @enumerate and @introspection functions in @vtable are used to
4813 * convey, to remote callers, what nodes exist in the subtree rooted
4816 * When handling remote calls into any node in the subtree, first the
4817 * @enumerate function is used to check if the node exists. If the node exists
4818 * or the #G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES flag is set
4819 * the @introspection function is used to check if the node supports the
4820 * requested method. If so, the @dispatch function is used to determine
4821 * where to dispatch the call. The collected #GDBusInterfaceVTable and
4822 * #gpointer will be used to call into the interface vtable for processing
4825 * All calls into user-provided code will be invoked in the <link
4826 * linkend="g-main-context-push-thread-default">thread-default main
4827 * loop</link> of the thread you are calling this method from.
4829 * If an existing subtree is already registered at @object_path or
4830 * then @error is set to #G_IO_ERROR_EXISTS.
4832 * Note that it is valid to register regular objects (using
4833 * g_dbus_connection_register_object()) in a subtree registered with
4834 * g_dbus_connection_register_subtree() - if so, the subtree handler
4835 * is tried as the last resort. One way to think about a subtree
4836 * handler is to consider it a <quote>fallback handler</quote>
4837 * for object paths not registered via g_dbus_connection_register_object()
4838 * or other bindings.
4840 * See <xref linkend="gdbus-subtree-server"/> for an example of how to use this method.
4842 * Returns: 0 if @error is set, otherwise a subtree registration id (never 0)
4843 * that can be used with g_dbus_connection_unregister_subtree() .
4848 g_dbus_connection_register_subtree (GDBusConnection *connection,
4849 const gchar *object_path,
4850 const GDBusSubtreeVTable *vtable,
4851 GDBusSubtreeFlags flags,
4853 GDestroyNotify user_data_free_func,
4857 ExportedSubtree *es;
4859 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
4860 g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), 0);
4861 g_return_val_if_fail (vtable != NULL, 0);
4862 g_return_val_if_fail (error == NULL || *error == NULL, 0);
4866 CONNECTION_LOCK (connection);
4868 es = g_hash_table_lookup (connection->priv->map_object_path_to_es, object_path);
4874 _("A subtree is already exported for %s"),
4879 es = g_new0 (ExportedSubtree, 1);
4880 es->object_path = g_strdup (object_path);
4881 es->connection = connection;
4883 es->vtable = vtable;
4885 es->id = _global_subtree_registration_id++; /* TODO: overflow etc. */
4886 es->user_data = user_data;
4887 es->user_data_free_func = user_data_free_func;
4888 es->context = g_main_context_get_thread_default ();
4889 if (es->context != NULL)
4890 g_main_context_ref (es->context);
4892 g_hash_table_insert (connection->priv->map_object_path_to_es, es->object_path, es);
4893 g_hash_table_insert (connection->priv->map_id_to_es,
4894 GUINT_TO_POINTER (es->id),
4900 CONNECTION_UNLOCK (connection);
4905 /* ---------------------------------------------------------------------------------------------------- */
4908 * g_dbus_connection_unregister_subtree:
4909 * @connection: A #GDBusConnection.
4910 * @registration_id: A subtree registration id obtained from g_dbus_connection_register_subtree().
4912 * Unregisters a subtree.
4914 * Returns: %TRUE if the subtree was unregistered, %FALSE otherwise.
4919 g_dbus_connection_unregister_subtree (GDBusConnection *connection,
4920 guint registration_id)
4922 ExportedSubtree *es;
4925 g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
4929 CONNECTION_LOCK (connection);
4931 es = g_hash_table_lookup (connection->priv->map_id_to_es,
4932 GUINT_TO_POINTER (registration_id));
4936 g_warn_if_fail (g_hash_table_remove (connection->priv->map_id_to_es, GUINT_TO_POINTER (es->id)));
4937 g_warn_if_fail (g_hash_table_remove (connection->priv->map_object_path_to_es, es->object_path));
4942 CONNECTION_UNLOCK (connection);
4947 /* ---------------------------------------------------------------------------------------------------- */
4949 /* must be called with lock held */
4951 handle_generic_ping_unlocked (GDBusConnection *connection,
4952 const gchar *object_path,
4953 GDBusMessage *message)
4955 GDBusMessage *reply;
4956 reply = g_dbus_message_new_method_reply (message);
4957 g_dbus_connection_send_message_unlocked (connection, reply, NULL, NULL);
4958 g_object_unref (reply);
4961 /* must be called with lock held */
4963 handle_generic_get_machine_id_unlocked (GDBusConnection *connection,
4964 const gchar *object_path,
4965 GDBusMessage *message)
4967 GDBusMessage *reply;
4970 if (connection->priv->machine_id == NULL)
4974 /* TODO: use PACKAGE_LOCALSTATEDIR ? */
4975 if (!g_file_get_contents ("/var/lib/dbus/machine-id",
4976 &connection->priv->machine_id,
4980 reply = g_dbus_message_new_method_error (message,
4981 "org.freedesktop.DBus.Error.Failed",
4982 _("Unable to load /var/lib/dbus/machine-id: %s"),
4984 g_error_free (error);
4988 g_strstrip (connection->priv->machine_id);
4989 /* TODO: validate value */
4995 reply = g_dbus_message_new_method_reply (message);
4996 g_dbus_message_set_body (reply, g_variant_new ("(s)", connection->priv->machine_id));
4998 g_dbus_connection_send_message_unlocked (connection, reply, NULL, NULL);
4999 g_object_unref (reply);
5002 /* must be called with lock held */
5004 handle_generic_introspect_unlocked (GDBusConnection *connection,
5005 const gchar *object_path,
5006 GDBusMessage *message)
5011 GDBusMessage *reply;
5013 /* first the header */
5014 s = g_string_new (NULL);
5015 introspect_append_header (s);
5017 registered = g_dbus_connection_list_registered_unlocked (connection, object_path);
5018 for (n = 0; registered != NULL && registered[n] != NULL; n++)
5019 g_string_append_printf (s, " <node name=\"%s\"/>\n", registered[n]);
5020 g_strfreev (registered);
5021 g_string_append (s, "</node>\n");
5023 reply = g_dbus_message_new_method_reply (message);
5024 g_dbus_message_set_body (reply, g_variant_new ("(s)", s->str));
5025 g_dbus_connection_send_message_unlocked (connection, reply, NULL, NULL);
5026 g_object_unref (reply);
5027 g_string_free (s, TRUE);
5030 /* must be called with lock held */
5032 handle_generic_unlocked (GDBusConnection *connection,
5033 GDBusMessage *message)
5036 const gchar *interface_name;
5037 const gchar *member;
5038 const gchar *signature;
5041 CONNECTION_ENSURE_LOCK (connection);
5045 interface_name = g_dbus_message_get_interface (message);
5046 member = g_dbus_message_get_member (message);
5047 signature = g_dbus_message_get_signature (message);
5048 path = g_dbus_message_get_path (message);
5050 if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Introspectable") == 0 &&
5051 g_strcmp0 (member, "Introspect") == 0 &&
5052 g_strcmp0 (signature, "") == 0)
5054 handle_generic_introspect_unlocked (connection, path, message);
5057 else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Peer") == 0 &&
5058 g_strcmp0 (member, "Ping") == 0 &&
5059 g_strcmp0 (signature, "") == 0)
5061 handle_generic_ping_unlocked (connection, path, message);
5064 else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Peer") == 0 &&
5065 g_strcmp0 (member, "GetMachineId") == 0 &&
5066 g_strcmp0 (signature, "") == 0)
5068 handle_generic_get_machine_id_unlocked (connection, path, message);
5075 /* ---------------------------------------------------------------------------------------------------- */
5077 /* called in message handler thread with lock held */
5079 distribute_method_call (GDBusConnection *connection,
5080 GDBusMessage *message)
5083 ExportedSubtree *es;
5084 const gchar *object_path;
5085 const gchar *interface_name;
5086 const gchar *member;
5087 const gchar *signature;
5089 gchar *subtree_path;
5092 g_assert (g_dbus_message_get_message_type (message) == G_DBUS_MESSAGE_TYPE_METHOD_CALL);
5094 interface_name = g_dbus_message_get_interface (message);
5095 member = g_dbus_message_get_member (message);
5096 signature = g_dbus_message_get_signature (message);
5097 path = g_dbus_message_get_path (message);
5098 subtree_path = g_strdup (path);
5099 needle = strrchr (subtree_path, '/');
5100 if (needle != NULL && needle != subtree_path)
5106 g_free (subtree_path);
5107 subtree_path = NULL;
5111 g_debug ("interface = `%s'", interface_name);
5112 g_debug ("member = `%s'", member);
5113 g_debug ("signature = `%s'", signature);
5114 g_debug ("path = `%s'", path);
5115 g_debug ("subtree_path = `%s'", subtree_path != NULL ? subtree_path : "N/A");
5118 object_path = g_dbus_message_get_path (message);
5119 g_assert (object_path != NULL);
5121 eo = g_hash_table_lookup (connection->priv->map_object_path_to_eo, object_path);
5124 if (obj_message_func (connection, eo, message))
5128 es = g_hash_table_lookup (connection->priv->map_object_path_to_es, object_path);
5131 if (subtree_message_func (connection, es, message))
5135 if (subtree_path != NULL)
5137 es = g_hash_table_lookup (connection->priv->map_object_path_to_es, subtree_path);
5140 if (subtree_message_func (connection, es, message))
5145 if (handle_generic_unlocked (connection, message))
5148 /* if we end up here, the message has not been not handled */
5151 g_free (subtree_path);
5154 /* ---------------------------------------------------------------------------------------------------- */
5156 static GDBusConnection **
5157 message_bus_get_singleton (GBusType bus_type,
5160 GDBusConnection **ret;
5161 const gchar *starter_bus;
5167 case G_BUS_TYPE_SESSION:
5168 ret = &the_session_bus;
5171 case G_BUS_TYPE_SYSTEM:
5172 ret = &the_system_bus;
5175 case G_BUS_TYPE_STARTER:
5176 starter_bus = g_getenv ("DBUS_STARTER_BUS_TYPE");
5177 if (g_strcmp0 (starter_bus, "session") == 0)
5179 ret = message_bus_get_singleton (G_BUS_TYPE_SESSION, error);
5182 else if (g_strcmp0 (starter_bus, "system") == 0)
5184 ret = message_bus_get_singleton (G_BUS_TYPE_SYSTEM, error);
5189 if (starter_bus != NULL)
5193 G_IO_ERROR_INVALID_ARGUMENT,
5194 _("Cannot determine bus address from DBUS_STARTER_BUS_TYPE environment variable"
5195 " - unknown value `%s'"),
5200 g_set_error_literal (error,
5202 G_IO_ERROR_INVALID_ARGUMENT,
5203 _("Cannot determine bus address because the DBUS_STARTER_BUS_TYPE environment "
5204 "variable is not set"));
5210 g_assert_not_reached ();
5218 static GDBusConnection *
5219 get_uninitialized_connection (GBusType bus_type,
5220 GCancellable *cancellable,
5223 GDBusConnection **singleton;
5224 GDBusConnection *ret;
5228 G_LOCK (message_bus_lock);
5229 singleton = message_bus_get_singleton (bus_type, error);
5230 if (singleton == NULL)
5233 if (*singleton == NULL)
5236 address = g_dbus_address_get_for_bus_sync (bus_type, cancellable, error);
5237 if (address == NULL)
5239 ret = *singleton = g_object_new (G_TYPE_DBUS_CONNECTION,
5241 "flags", G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT |
5242 G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION,
5243 "exit-on-close", TRUE,
5248 ret = g_object_ref (*singleton);
5251 g_assert (ret != NULL);
5254 G_UNLOCK (message_bus_lock);
5260 * @bus_type: A #GBusType.
5261 * @cancellable: A #GCancellable or %NULL.
5262 * @error: Return location for error or %NULL.
5264 * Synchronously connects to the message bus specified by @bus_type.
5265 * Note that the returned object may shared with other callers,
5266 * e.g. if two separate parts of a process calls this function with
5267 * the same @bus_type, they will share the same object.
5269 * This is a synchronous failable function. See g_bus_get() and
5270 * g_bus_get_finish() for the asynchronous version.
5272 * The returned object is a singleton, that is, shared with other
5273 * callers of g_bus_get() and g_bus_get_sync() for @bus_type. In the
5274 * event that you need a private message bus connection, use
5275 * g_dbus_address_get_for_bus_sync() and
5276 * g_dbus_connection_new_for_address().
5278 * Note that the returned #GDBusConnection object will (usually) have
5279 * the #GDBusConnection:exit-on-close property set to %TRUE.
5281 * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
5286 g_bus_get_sync (GBusType bus_type,
5287 GCancellable *cancellable,
5290 GDBusConnection *connection;
5292 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
5294 connection = get_uninitialized_connection (bus_type, cancellable, error);
5295 if (connection == NULL)
5298 if (!g_initable_init (G_INITABLE (connection), cancellable, error))
5300 g_object_unref (connection);
5309 bus_get_async_initable_cb (GObject *source_object,
5313 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
5317 if (!g_async_initable_init_finish (G_ASYNC_INITABLE (source_object),
5321 g_assert (error != NULL);
5322 g_simple_async_result_set_from_error (simple, error);
5323 g_error_free (error);
5324 g_object_unref (source_object);
5328 g_simple_async_result_set_op_res_gpointer (simple,
5332 g_simple_async_result_complete_in_idle (simple);
5333 g_object_unref (simple);
5338 * @bus_type: A #GBusType.
5339 * @cancellable: A #GCancellable or %NULL.
5340 * @callback: A #GAsyncReadyCallback to call when the request is satisfied.
5341 * @user_data: The data to pass to @callback.
5343 * Asynchronously connects to the message bus specified by @bus_type.
5345 * When the operation is finished, @callback will be invoked. You can
5346 * then call g_bus_get_finish() to get the result of the operation.
5348 * This is a asynchronous failable function. See g_bus_get_sync() for
5349 * the synchronous version.
5354 g_bus_get (GBusType bus_type,
5355 GCancellable *cancellable,
5356 GAsyncReadyCallback callback,
5359 GDBusConnection *connection;
5360 GSimpleAsyncResult *simple;
5363 simple = g_simple_async_result_new (NULL,
5369 connection = get_uninitialized_connection (bus_type, cancellable, &error);
5370 if (connection == NULL)
5372 g_assert (error != NULL);
5373 g_simple_async_result_set_from_error (simple, error);
5374 g_error_free (error);
5375 g_simple_async_result_complete_in_idle (simple);
5376 g_object_unref (simple);
5380 g_async_initable_init_async (G_ASYNC_INITABLE (connection),
5383 bus_get_async_initable_cb,
5390 * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_bus_get().
5391 * @error: Return location for error or %NULL.
5393 * Finishes an operation started with g_bus_get().
5395 * The returned object is a singleton, that is, shared with other
5396 * callers of g_bus_get() and g_bus_get_sync() for @bus_type. In the
5397 * event that you need a private message bus connection, use
5398 * g_dbus_address_get_for_bus() and
5399 * g_dbus_connection_new_for_address().
5401 * Note that the returned #GDBusConnection object will (usually) have
5402 * the #GDBusConnection:exit-on-close property set to %TRUE.
5404 * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
5409 g_bus_get_finish (GAsyncResult *res,
5412 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
5414 GDBusConnection *ret;
5416 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
5418 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_bus_get);
5422 if (g_simple_async_result_propagate_error (simple, error))
5425 object = g_simple_async_result_get_op_res_gpointer (simple);
5426 g_assert (object != NULL);
5427 ret = g_object_ref (G_DBUS_CONNECTION (object));
5433 /* ---------------------------------------------------------------------------------------------------- */
5435 #define __G_DBUS_CONNECTION_C__
5436 #include "gioaliasdef.c"