GDBus - GLib D-Bus Library
D:\code\glib-master\gio\gdbusconnection.c
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6422 6423 6424 | /* GDBus - GLib D-Bus Library * * Copyright (C) 2008-2010 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General * Public License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place, Suite 330, * Boston, MA 02111-1307, USA. * * Author: David Zeuthen <davidz@redhat.com> *//* * TODO for GDBus: * * - would be nice to expose GDBusAuthMechanism and an extension point * * - Need to rewrite GDBusAuth and rework GDBusAuthMechanism. In particular * the mechanism VFuncs need to be able to set an error. * * - Need to document other mechanisms/sources for determining the D-Bus * address of a well-known bus. * * - e.g. on Win32 we need code like from here * * http://cgit.freedesktop.org/~david/gdbus-standalone/tree/gdbus/gdbusaddress.c#n900 * * that was never copied over here because it originally was copy-paste * from the GPLv2 / AFL 2.1 libdbus sources. * * - on OS X we need to look in launchd for the address * * https://bugs.freedesktop.org/show_bug.cgi?id=14259 * * - on X11 we need to look in a X11 property on the X server * - (we can also just use dbus-launch(1) from the D-Bus * distribution) * * - (ideally) this requires D-Bus spec work because none of * this has never really been specced out properly (excect * the X11 bits) * * - Related to the above, we also need to be able to launch a message bus * instance.... Since we don't want to write our own bus daemon we should * launch dbus-daemon(1) (thus: Win32 and OS X need to bundle it) * * - probably want a G_DBUS_NONCE_TCP_TMPDIR environment variable * to specify where the nonce is stored. This will allow people to use * G_DBUS_NONCE_TCP_TMPDIR=/mnt/secure.company.server/dbus-nonce-dir * to easily acheive secure RPC via nonce-tcp. * * - need to expose an extension point for resolving D-Bus address and * turning them into GIOStream objects. This will allow us to implement * e.g. X11 D-Bus transports without dlopen()'ing or linking against * libX11 from libgio. * - see g_dbus_address_connect() in gdbusaddress.c * * - would be cute to use kernel-specific APIs to resolve fds for * debug output when using G_DBUS_DEBUG=message, e.g. in addition to * * fd 21: dev=8:1,mode=0100644,ino=1171231,uid=0,gid=0,rdev=0:0,size=234,atime=1273070640,mtime=1267126160,ctime=1267126160 * * maybe we can show more information about what fd 21 really is. * Ryan suggests looking in /proc/self/fd for clues / symlinks! * Initial experiments on Linux 2.6 suggests that the symlink looks * like this: * * 3 -> /proc/18068/fd * * e.g. not of much use. * * - GDBus High-Level docs * - Proxy: properties, signals... * - Connection: IOStream based, ::close, connection setup steps * mainloop integration, threading * - Differences from libdbus (extend "Migrating from") * - the message handling thread * - Using GVariant instead of GValue * - Explain why the high-level API is a good thing and what * kind of pitfalls it avoids * - Export objects before claiming names * - Talk about auto-starting services (cf. GBusNameWatcherFlags) * * - use abstract sockets in test code * - right now it doesn't work, dbus-daemon(1) fails with * * /gdbus/connection/filter: Failed to start message bus: Failed to bind * socket "/tmp/g-dbus-tests-pid-28531": Address already in use * ** WARNING **: Error reading address from dbus daemon, 0 bytes read * * or similar. */#include "config.h"#include <stdlib.h>#include <string.h>#include <sys/types.h>#ifdef HAVE_UNISTD_H#include <unistd.h>#endif#include "gdbusauth.h"#include "gdbusutils.h"#include "gdbusaddress.h"#include "gdbusmessage.h"#include "gdbusconnection.h"#include "gdbuserror.h"#include "gioenumtypes.h"#include "gdbusintrospection.h"#include "gdbusmethodinvocation.h"#include "gdbusprivate.h"#include "gdbusauthobserver.h"#include "gio-marshal.h"#include "ginitable.h"#include "gasyncinitable.h"#include "giostream.h"#include "gasyncresult.h"#include "gsimpleasyncresult.h"#ifdef G_OS_UNIX#include "gunixconnection.h"#include "gunixfdmessage.h"#endif#include "glibintl.h"/** * SECTION:gdbusconnection * @short_description: D-Bus Connections * @include: gio/gio.h * * The #GDBusConnection type is used for D-Bus connections to remote * peers such as a message buses. It is a low-level API that offers a * lot of flexibility. For instance, it lets you establish a connection * over any transport that can by represented as an #GIOStream. * * This class is rarely used directly in D-Bus clients. If you are writing * an D-Bus client, it is often easier to use the g_bus_own_name(), * g_bus_watch_name() or g_dbus_proxy_new_for_bus() APIs. * * <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> * * <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> * * <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> * * <example id="gdbus-export"><title>Exporting a GObject</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-export.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example> *//* ---------------------------------------------------------------------------------------------------- */typedef struct _GDBusConnectionClass GDBusConnectionClass;/** * GDBusConnectionClass: * @closed: Signal class handler for the #GDBusConnection::closed signal. * * Class structure for #GDBusConnection. * * Since: 2.26 */struct _GDBusConnectionClass{ /*< private >*/ GObjectClass parent_class; /*< public >*/ /* Signals */ void (*closed) (GDBusConnection *connection, gboolean remote_peer_vanished, GError *error);};G_LOCK_DEFINE_STATIC (message_bus_lock);static GDBusConnection *the_session_bus = NULL;static GDBusConnection *the_system_bus = NULL;/* ---------------------------------------------------------------------------------------------------- */typedef struct{ GDestroyNotify callback; gpointer user_data; GMainContext *context;} CallDestroyNotifyData;static gbooleancall_destroy_notify_data_in_idle (gpointer user_data){ CallDestroyNotifyData *data = user_data; data->callback (data->user_data); return FALSE;}static voidcall_destroy_notify_data_free (CallDestroyNotifyData *data){ if (data->context != NULL) g_main_context_unref (data->context); g_free (data);}/* * call_destroy_notify: <internal> * @context: A #GMainContext or %NULL. * @callback: A #GDestroyNotify or %NULL. * @user_data: Data to pass to @callback. * * Schedules @callback to run in @context. */static voidcall_destroy_notify (GMainContext *context, GDestroyNotify callback, gpointer user_data){ if (callback == NULL) goto out; if (context == g_main_context_get_thread_default ()) { callback (user_data); } else { GSource *idle_source; CallDestroyNotifyData *data; data = g_new0 (CallDestroyNotifyData, 1); data->callback = callback; data->user_data = user_data; data->context = context; if (data->context != NULL) g_main_context_ref (data->context); idle_source = g_idle_source_new (); g_source_set_priority (idle_source, G_PRIORITY_DEFAULT); g_source_set_callback (idle_source, call_destroy_notify_data_in_idle, data, (GDestroyNotify) call_destroy_notify_data_free); g_source_attach (idle_source, data->context); g_source_unref (idle_source); } out: ;}/* ---------------------------------------------------------------------------------------------------- */static gboolean_g_strv_has_string (const gchar* const *haystack, const gchar *needle){ guint n; for (n = 0; haystack != NULL && haystack[n] != NULL; n++) { if (g_strcmp0 (haystack[n], needle) == 0) return TRUE; } return FALSE;}/* ---------------------------------------------------------------------------------------------------- */#ifdef G_OS_WIN32#define CONNECTION_ENSURE_LOCK(obj) do { ; } while (FALSE)#else// TODO: for some reason this doesn't work on Windows#define CONNECTION_ENSURE_LOCK(obj) do { \ if (G_UNLIKELY (g_mutex_trylock((obj)->lock))) \ { \ g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \ "CONNECTION_ENSURE_LOCK: GDBusConnection object lock is not locked"); \ } \ } while (FALSE)#endif#define CONNECTION_LOCK(obj) do { \ g_mutex_lock ((obj)->lock); \ } while (FALSE)#define CONNECTION_UNLOCK(obj) do { \ g_mutex_unlock ((obj)->lock); \ } while (FALSE)/** * GDBusConnection: * * The #GDBusConnection structure contains only private data and * should only be accessed using the provided API. * * Since: 2.26 */struct _GDBusConnection{ /*< private >*/ GObject parent_instance; /* ------------------------------------------------------------------------ */ /* -- General object state ------------------------------------------------ */ /* ------------------------------------------------------------------------ */ /* object-wide lock */ GMutex *lock; /* A lock used in the init() method of the GInitable interface - see comments * in initable_init() for why a separate lock is needed */ GMutex *init_lock; /* Set (by loading the contents of /var/lib/dbus/machine-id) the first time * someone calls org.freedesktop.DBus.GetMachineId() */ gchar *machine_id; /* The underlying stream used for communication */ GIOStream *stream; /* The object used for authentication (if any) */ GDBusAuth *auth; /* Set to TRUE if the connection has been closed */ gboolean closed; /* Last serial used */ guint32 last_serial; /* The object used to send/receive message */ GDBusWorker *worker; /* If connected to a message bus, this contains the unique name assigned to * us by the bus (e.g. ":1.42") */ gchar *bus_unique_name; /* The GUID returned by the other side if we authenticed as a client or * the GUID to use if authenticating as a server */ gchar *guid; /* set to TRUE exactly when initable_init() has finished running */ gboolean is_initialized; /* If the connection could not be established during initable_init(), this GError will set */ GError *initialization_error; /* The result of g_main_context_get_thread_default() when the object * was created (the GObject _init() function) - this is used for delivery * of the :closed GObject signal. */ GMainContext *main_context_at_construction; /* construct properties */ gchar *address; GDBusConnectionFlags flags; /* Map used for managing method replies */ GHashTable *map_method_serial_to_send_message_data; /* guint32 -> SendMessageData* */ /* Maps used for managing signal subscription */ GHashTable *map_rule_to_signal_data; /* match rule (gchar*) -> SignalData */ GHashTable *map_id_to_signal_data; /* id (guint) -> SignalData */ GHashTable *map_sender_unique_name_to_signal_data_array; /* unique sender (gchar*) -> GPtrArray* of SignalData */ /* Maps used for managing exported objects and subtrees */ GHashTable *map_object_path_to_eo; /* gchar* -> ExportedObject* */ GHashTable *map_id_to_ei; /* guint -> ExportedInterface* */ GHashTable *map_object_path_to_es; /* gchar* -> ExportedSubtree* */ GHashTable *map_id_to_es; /* guint -> ExportedSubtree* */ /* Structure used for message filters */ GPtrArray *filters; /* Whether to exit on close */ gboolean exit_on_close; /* Capabilities negotiated during authentication */ GDBusCapabilityFlags capabilities; GDBusAuthObserver *authentication_observer; GCredentials *credentials; /* set to TRUE when finalizing */ gboolean finalizing;};typedef struct ExportedObject ExportedObject;static void exported_object_free (ExportedObject *eo);typedef struct ExportedSubtree ExportedSubtree;static void exported_subtree_free (ExportedSubtree *es);enum{ CLOSED_SIGNAL, LAST_SIGNAL,};enum{ PROP_0, PROP_STREAM, PROP_ADDRESS, PROP_FLAGS, PROP_GUID, PROP_UNIQUE_NAME, PROP_CLOSED, PROP_EXIT_ON_CLOSE, PROP_CAPABILITY_FLAGS, PROP_AUTHENTICATION_OBSERVER,};static void distribute_signals (GDBusConnection *connection, GDBusMessage *message);static void distribute_method_call (GDBusConnection *connection, GDBusMessage *message);static gboolean handle_generic_unlocked (GDBusConnection *connection, GDBusMessage *message);static void purge_all_signal_subscriptions (GDBusConnection *connection);static void purge_all_filters (GDBusConnection *connection);#define _G_ENSURE_LOCK(name) do { \ if (G_UNLIKELY (G_TRYLOCK(name))) \ { \ g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \ "_G_ENSURE_LOCK: Lock `" #name "' is not locked"); \ } \ } while (FALSE) \static guint signals[LAST_SIGNAL] = { 0 };static void initable_iface_init (GInitableIface *initable_iface);static void async_initable_iface_init (GAsyncInitableIface *async_initable_iface);G_DEFINE_TYPE_WITH_CODE (GDBusConnection, g_dbus_connection, G_TYPE_OBJECT, G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, initable_iface_init) G_IMPLEMENT_INTERFACE (G_TYPE_ASYNC_INITABLE, async_initable_iface_init) );static GHashTable *alive_connections = NULL;static voidg_dbus_connection_dispose (GObject *object){ GDBusConnection *connection = G_DBUS_CONNECTION (object); G_LOCK (message_bus_lock); if (connection == the_session_bus) { the_session_bus = NULL; } else if (connection == the_system_bus) { the_system_bus = NULL; } CONNECTION_LOCK (connection); if (connection->worker != NULL) { _g_dbus_worker_stop (connection->worker); connection->worker = NULL; if (alive_connections != NULL) g_warn_if_fail (g_hash_table_remove (alive_connections, connection)); } else { if (alive_connections != NULL) g_warn_if_fail (g_hash_table_lookup (alive_connections, connection) == NULL); } CONNECTION_UNLOCK (connection); G_UNLOCK (message_bus_lock); if (G_OBJECT_CLASS (g_dbus_connection_parent_class)->dispose != NULL) G_OBJECT_CLASS (g_dbus_connection_parent_class)->dispose (object);}static voidg_dbus_connection_finalize (GObject *object){ GDBusConnection *connection = G_DBUS_CONNECTION (object); connection->finalizing = TRUE; purge_all_signal_subscriptions (connection); purge_all_filters (connection); g_ptr_array_unref (connection->filters); if (connection->authentication_observer != NULL) g_object_unref (connection->authentication_observer); if (connection->auth != NULL) g_object_unref (connection->auth); if (connection->credentials) g_object_unref (connection->credentials); if (connection->stream != NULL) { /* We don't really care if closing the stream succeeds or not */ g_io_stream_close_async (connection->stream, G_PRIORITY_DEFAULT, NULL, /* GCancellable */ NULL, /* GAsyncReadyCallback */ NULL); /* userdata */ g_object_unref (connection->stream); connection->stream = NULL; } g_free (connection->address); g_free (connection->guid); g_free (connection->bus_unique_name); if (connection->initialization_error != NULL) g_error_free (connection->initialization_error); g_hash_table_unref (connection->map_method_serial_to_send_message_data); g_hash_table_unref (connection->map_rule_to_signal_data); g_hash_table_unref (connection->map_id_to_signal_data); g_hash_table_unref (connection->map_sender_unique_name_to_signal_data_array); g_hash_table_unref (connection->map_id_to_ei); g_hash_table_unref (connection->map_object_path_to_eo); g_hash_table_unref (connection->map_id_to_es); g_hash_table_unref (connection->map_object_path_to_es); if (connection->main_context_at_construction != NULL) g_main_context_unref (connection->main_context_at_construction); g_free (connection->machine_id); g_mutex_free (connection->init_lock); g_mutex_free (connection->lock); G_OBJECT_CLASS (g_dbus_connection_parent_class)->finalize (object);}static voidg_dbus_connection_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec){ GDBusConnection *connection = G_DBUS_CONNECTION (object); switch (prop_id) { case PROP_STREAM: g_value_set_object (value, g_dbus_connection_get_stream (connection)); break; case PROP_GUID: g_value_set_string (value, g_dbus_connection_get_guid (connection)); break; case PROP_UNIQUE_NAME: g_value_set_string (value, g_dbus_connection_get_unique_name (connection)); break; case PROP_CLOSED: g_value_set_boolean (value, g_dbus_connection_is_closed (connection)); break; case PROP_EXIT_ON_CLOSE: g_value_set_boolean (value, g_dbus_connection_get_exit_on_close (connection)); break; case PROP_CAPABILITY_FLAGS: g_value_set_flags (value, g_dbus_connection_get_capabilities (connection)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; }}static voidg_dbus_connection_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec){ GDBusConnection *connection = G_DBUS_CONNECTION (object); switch (prop_id) { case PROP_STREAM: connection->stream = g_value_dup_object (value); break; case PROP_GUID: connection->guid = g_value_dup_string (value); break; case PROP_ADDRESS: connection->address = g_value_dup_string (value); break; case PROP_FLAGS: connection->flags = g_value_get_flags (value); break; case PROP_EXIT_ON_CLOSE: g_dbus_connection_set_exit_on_close (connection, g_value_get_boolean (value)); break; case PROP_AUTHENTICATION_OBSERVER: connection->authentication_observer = g_value_dup_object (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; }}static voidg_dbus_connection_real_closed (GDBusConnection *connection, gboolean remote_peer_vanished, GError *error){ if (remote_peer_vanished && connection->exit_on_close) { if (error != NULL) { g_print ("%s: Remote peer vanished with error: %s (%s, %d). Exiting.\n", G_STRFUNC, error->message, g_quark_to_string (error->domain), error->code); } else { g_print ("%s: Remote peer vanished. Exiting.\n", G_STRFUNC); } raise (SIGTERM); }}static voidg_dbus_connection_class_init (GDBusConnectionClass *klass){ GObjectClass *gobject_class; gobject_class = G_OBJECT_CLASS (klass); gobject_class->finalize = g_dbus_connection_finalize; gobject_class->dispose = g_dbus_connection_dispose; gobject_class->set_property = g_dbus_connection_set_property; gobject_class->get_property = g_dbus_connection_get_property; klass->closed = g_dbus_connection_real_closed; /** * GDBusConnection:stream: * * The underlying #GIOStream used for I/O. * * Since: 2.26 */ g_object_class_install_property (gobject_class, PROP_STREAM, g_param_spec_object ("stream", P_("IO Stream"), P_("The underlying streams used for I/O"), G_TYPE_IO_STREAM, G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK)); /** * GDBusConnection:address: * * A D-Bus address specifying potential endpoints that can be used * when establishing the connection. * * Since: 2.26 */ g_object_class_install_property (gobject_class, PROP_ADDRESS, g_param_spec_string ("address", P_("Address"), P_("D-Bus address specifying potential socket endpoints"), NULL, G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK)); /** * GDBusConnection:flags: * * Flags from the #GDBusConnectionFlags enumeration. * * Since: 2.26 */ g_object_class_install_property (gobject_class, PROP_FLAGS, g_param_spec_flags ("flags", P_("Flags"), P_("Flags"), G_TYPE_DBUS_CONNECTION_FLAGS, G_DBUS_CONNECTION_FLAGS_NONE, G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK)); /** * GDBusConnection:guid: * * The GUID of the peer performing the role of server when * authenticating. * * If you are constructing a #GDBusConnection and pass * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER in the * #GDBusConnection:flags property then you MUST also set this * property to a valid guid. * * If you are constructing a #GDBusConnection and pass * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT in the * #GDBusConnection:flags property you will be able to read the GUID * of the other peer here after the connection has been successfully * initialized. * * Since: 2.26 */ g_object_class_install_property (gobject_class, PROP_GUID, g_param_spec_string ("guid", P_("GUID"), P_("GUID of the server peer"), NULL, G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK)); /** * GDBusConnection:unique-name: * * The unique name as assigned by the message bus or %NULL if the * connection is not open or not a message bus connection. * * Since: 2.26 */ g_object_class_install_property (gobject_class, PROP_UNIQUE_NAME, g_param_spec_string ("unique-name", P_("unique-name"), P_("Unique name of bus connection"), NULL, G_PARAM_READABLE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK)); /** * GDBusConnection:closed: * * A boolean specifying whether the connection has been closed. * * Since: 2.26 */ g_object_class_install_property (gobject_class, PROP_CLOSED, g_param_spec_boolean ("closed", P_("Closed"), P_("Whether the connection is closed"), FALSE, G_PARAM_READABLE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK)); /** * GDBusConnection:exit-on-close: * * A boolean specifying whether the process will be terminated (by * calling <literal>raise(SIGTERM)</literal>) if the connection * is closed by the remote peer. * * Since: 2.26 */ g_object_class_install_property (gobject_class, PROP_EXIT_ON_CLOSE, g_param_spec_boolean ("exit-on-close", P_("Exit on close"), P_("Whether the process is terminated when the connection is closed"), FALSE, G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK)); /** * GDBusConnection:capabilities: * * Flags from the #GDBusCapabilityFlags enumeration * representing connection features negotiated with the other peer. * * Since: 2.26 */ g_object_class_install_property (gobject_class, PROP_CAPABILITY_FLAGS, g_param_spec_flags ("capabilities", P_("Capabilities"), P_("Capabilities"), G_TYPE_DBUS_CAPABILITY_FLAGS, G_DBUS_CAPABILITY_FLAGS_NONE, G_PARAM_READABLE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK)); /** * GDBusConnection:authentication-observer: * * A #GDBusAuthObserver object to assist in the authentication process or %NULL. * * Since: 2.26 */ g_object_class_install_property (gobject_class, PROP_AUTHENTICATION_OBSERVER, g_param_spec_object ("authentication-observer", P_("Authentication Observer"), P_("Object used to assist in the authentication process"), G_TYPE_DBUS_AUTH_OBSERVER, G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK)); /** * GDBusConnection::closed: * @connection: The #GDBusConnection emitting the signal. * @remote_peer_vanished: %TRUE if @connection is closed because the * remote peer closed its end of the connection. * @error: A #GError with more details about the event or %NULL. * * Emitted when the connection is closed. * * The cause of this event can be * <itemizedlist> * <listitem><para> * If g_dbus_connection_close() is called. In this case * @remote_peer_vanished is set to %FALSE and @error is %NULL. * </para></listitem> * <listitem><para> * If the remote peer closes the connection. In this case * @remote_peer_vanished is set to %TRUE and @error is set. * </para></listitem> * <listitem><para> * If the remote peer sends invalid or malformed data. In this * case @remote_peer_vanished is set to %FALSE and @error * is set. * </para></listitem> * </itemizedlist> * * Upon receiving this signal, you should give up your reference to * @connection. You are guaranteed that this signal is emitted only * once. * * Since: 2.26 */ signals[CLOSED_SIGNAL] = g_signal_new ("closed", G_TYPE_DBUS_CONNECTION, G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GDBusConnectionClass, closed), NULL, NULL, _gio_marshal_VOID__BOOLEAN_BOXED, G_TYPE_NONE, 2, G_TYPE_BOOLEAN, G_TYPE_ERROR);}static voidg_dbus_connection_init (GDBusConnection *connection){ connection->lock = g_mutex_new (); connection->init_lock = g_mutex_new (); connection->map_method_serial_to_send_message_data = g_hash_table_new (g_direct_hash, g_direct_equal); connection->map_rule_to_signal_data = g_hash_table_new (g_str_hash, g_str_equal); connection->map_id_to_signal_data = g_hash_table_new (g_direct_hash, g_direct_equal); connection->map_sender_unique_name_to_signal_data_array = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, (GDestroyNotify) g_ptr_array_unref); connection->map_object_path_to_eo = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, (GDestroyNotify) exported_object_free); connection->map_id_to_ei = g_hash_table_new (g_direct_hash, g_direct_equal); connection->map_object_path_to_es = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, (GDestroyNotify) exported_subtree_free); connection->map_id_to_es = g_hash_table_new (g_direct_hash, g_direct_equal); connection->main_context_at_construction = g_main_context_get_thread_default (); if (connection->main_context_at_construction != NULL) g_main_context_ref (connection->main_context_at_construction); connection->filters = g_ptr_array_new ();}/** * g_dbus_connection_get_stream: * @connection: a #GDBusConnection * * Gets the underlying stream used for IO. * * Returns: (transfer none): the stream used for IO * * Since: 2.26 */GIOStream *g_dbus_connection_get_stream (GDBusConnection *connection){ g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL); return connection->stream;}/** * g_dbus_connection_start_message_processing: * @connection: A #GDBusConnection. * * If @connection was created with * %G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING, this method * starts processing messages. Does nothing on if @connection wasn't * created with this flag or if the method has already been called. * * Since: 2.26 */voidg_dbus_connection_start_message_processing (GDBusConnection *connection){ g_return_if_fail (G_IS_DBUS_CONNECTION (connection)); _g_dbus_worker_unfreeze (connection->worker);}/** * g_dbus_connection_is_closed: * @connection: A #GDBusConnection. * * Gets whether @connection is closed. * * Returns: %TRUE if the connection is closed, %FALSE otherwise. * * Since: 2.26 */gbooleang_dbus_connection_is_closed (GDBusConnection *connection){ g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); return connection->closed;}/** * g_dbus_connection_get_capabilities: * @connection: A #GDBusConnection. * * Gets the capabilities negotiated with the remote peer * * Returns: Zero or more flags from the #GDBusCapabilityFlags enumeration. * * Since: 2.26 */GDBusCapabilityFlagsg_dbus_connection_get_capabilities (GDBusConnection *connection){ g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), G_DBUS_CAPABILITY_FLAGS_NONE); return connection->capabilities;}/* ---------------------------------------------------------------------------------------------------- */static voidflush_in_thread_func (GSimpleAsyncResult *res, GObject *object, GCancellable *cancellable){ GError *error; error = NULL; if (!g_dbus_connection_flush_sync (G_DBUS_CONNECTION (object), cancellable, &error)) g_simple_async_result_take_error (res, error);}/** * g_dbus_connection_flush: * @connection: A #GDBusConnection. * @cancellable: A #GCancellable or %NULL. * @callback: A #GAsyncReadyCallback to call when the request is satisfied or %NULL if you don't * care about the result. * @user_data: The data to pass to @callback. * * Asynchronously flushes @connection, that is, writes all queued * outgoing message to the transport and then flushes the transport * (using g_output_stream_flush_async()). This is useful in programs * that wants to emit a D-Bus signal and then exit * immediately. Without flushing the connection, there is no guarantee * that the message has been sent to the networking buffers in the OS * kernel. * * This is an asynchronous method. When the operation is finished, * @callback will be invoked in the <link * linkend="g-main-context-push-thread-default">thread-default main * loop</link> of the thread you are calling this method from. You can * then call g_dbus_connection_flush_finish() to get the result of the * operation. See g_dbus_connection_flush_sync() for the synchronous * version. * * Since: 2.26 */voidg_dbus_connection_flush (GDBusConnection *connection, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data){ GSimpleAsyncResult *simple; g_return_if_fail (G_IS_DBUS_CONNECTION (connection)); simple = g_simple_async_result_new (G_OBJECT (connection), callback, user_data, g_dbus_connection_flush); g_simple_async_result_run_in_thread (simple, flush_in_thread_func, G_PRIORITY_DEFAULT, cancellable); g_object_unref (simple);}/** * g_dbus_connection_flush_finish: * @connection: A #GDBusConnection. * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_flush(). * @error: Return location for error or %NULL. * * Finishes an operation started with g_dbus_connection_flush(). * * Returns: %TRUE if the operation succeeded, %FALSE if @error is set. * * Since: 2.26 */gbooleang_dbus_connection_flush_finish (GDBusConnection *connection, GAsyncResult *res, GError **error){ GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res); gboolean ret; ret = FALSE; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); g_return_val_if_fail (G_IS_ASYNC_RESULT (res), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_dbus_connection_flush); if (g_simple_async_result_propagate_error (simple, error)) goto out; ret = TRUE; out: return ret;}/** * g_dbus_connection_flush_sync: * @connection: A #GDBusConnection. * @cancellable: A #GCancellable or %NULL. * @error: Return location for error or %NULL. * * Synchronously flushes @connection. The calling thread is blocked * until this is done. See g_dbus_connection_flush() for the * asynchronous version of this method and more details about what it * does. * * Returns: %TRUE if the operation succeeded, %FALSE if @error is set. * * Since: 2.26 */gbooleang_dbus_connection_flush_sync (GDBusConnection *connection, GCancellable *cancellable, GError **error){ gboolean ret; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); ret = FALSE; if (connection->closed) { g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CLOSED, _("The connection is closed")); goto out; } ret = _g_dbus_worker_flush_sync (connection->worker, cancellable, error); out: return ret;}/* ---------------------------------------------------------------------------------------------------- */typedef struct{ GDBusConnection *connection; GError *error; gboolean remote_peer_vanished;} EmitClosedData;static voidemit_closed_data_free (EmitClosedData *data){ g_object_unref (data->connection); if (data->error != NULL) g_error_free (data->error); g_free (data);}static gbooleanemit_closed_in_idle (gpointer user_data){ EmitClosedData *data = user_data; gboolean result; g_object_notify (G_OBJECT (data->connection), "closed"); g_signal_emit (data->connection, signals[CLOSED_SIGNAL], 0, data->remote_peer_vanished, data->error, &result); return FALSE;}/* Can be called from any thread, must hold lock */static voidset_closed_unlocked (GDBusConnection *connection, gboolean remote_peer_vanished, GError *error){ GSource *idle_source; EmitClosedData *data; CONNECTION_ENSURE_LOCK (connection); g_assert (!connection->closed); connection->closed = TRUE; data = g_new0 (EmitClosedData, 1); data->connection = g_object_ref (connection); data->remote_peer_vanished = remote_peer_vanished; data->error = error != NULL ? g_error_copy (error) : NULL; idle_source = g_idle_source_new (); g_source_set_priority (idle_source, G_PRIORITY_DEFAULT); g_source_set_callback (idle_source, emit_closed_in_idle, data, (GDestroyNotify) emit_closed_data_free); g_source_attach (idle_source, connection->main_context_at_construction); g_source_unref (idle_source);}/* ---------------------------------------------------------------------------------------------------- */static voidclose_in_thread_func (GSimpleAsyncResult *res, GObject *object, GCancellable *cancellable){ GError *error; error = NULL; if (!g_dbus_connection_close_sync (G_DBUS_CONNECTION (object), cancellable, &error)) g_simple_async_result_take_error (res, error);}/** * g_dbus_connection_close: * @connection: A #GDBusConnection. * @cancellable: A #GCancellable or %NULL. * @callback: A #GAsyncReadyCallback to call when the request is satisfied or %NULL if you don't * care about the result. * @user_data: The data to pass to @callback. * * Closes @connection. Note that this never causes the process to * exit (this might only happen if the other end of a shared message * bus connection disconnects, see #GDBusConnection:exit-on-close). * * Once the connection is closed, operations such as sending a message * will return with the error %G_IO_ERROR_CLOSED. Closing a connection * will not automatically flush the connection so queued messages may * be lost. Use g_dbus_connection_flush() if you need such guarantees. * * If @connection is already closed, this method fails with * %G_IO_ERROR_CLOSED. * * When @connection has been closed, the #GDBusConnection::closed * signal is emitted in the <link * linkend="g-main-context-push-thread-default">thread-default main * loop</link> of the thread that @connection was constructed in. * * This is an asynchronous method. When the operation is finished, * @callback will be invoked in the <link * linkend="g-main-context-push-thread-default">thread-default main * loop</link> of the thread you are calling this method from. You can * then call g_dbus_connection_close_finish() to get the result of the * operation. See g_dbus_connection_close_sync() for the synchronous * version. * * Since: 2.26 */voidg_dbus_connection_close (GDBusConnection *connection, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data){ GSimpleAsyncResult *simple; g_return_if_fail (G_IS_DBUS_CONNECTION (connection)); simple = g_simple_async_result_new (G_OBJECT (connection), callback, user_data, g_dbus_connection_close); g_simple_async_result_run_in_thread (simple, close_in_thread_func, G_PRIORITY_DEFAULT, cancellable); g_object_unref (simple);}/** * g_dbus_connection_close_finish: * @connection: A #GDBusConnection. * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_close(). * @error: Return location for error or %NULL. * * Finishes an operation started with g_dbus_connection_close(). * * Returns: %TRUE if the operation succeeded, %FALSE if @error is set. * * Since: 2.26 */gbooleang_dbus_connection_close_finish (GDBusConnection *connection, GAsyncResult *res, GError **error){ GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res); gboolean ret; ret = FALSE; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); g_return_val_if_fail (G_IS_ASYNC_RESULT (res), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_dbus_connection_close); if (g_simple_async_result_propagate_error (simple, error)) goto out; ret = TRUE; out: return ret;}/** * g_dbus_connection_close_sync: * @connection: A #GDBusConnection. * @cancellable: A #GCancellable or %NULL. * @error: Return location for error or %NULL. * * Synchronously closees @connection. The calling thread is blocked * until this is done. See g_dbus_connection_close() for the * asynchronous version of this method and more details about what it * does. * * Returns: %TRUE if the operation succeeded, %FALSE if @error is set. * * Since: 2.26 */gbooleang_dbus_connection_close_sync (GDBusConnection *connection, GCancellable *cancellable, GError **error){ gboolean ret; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); ret = FALSE; CONNECTION_LOCK (connection); if (!connection->closed) { ret = g_io_stream_close (connection->stream, cancellable, error); if (ret) set_closed_unlocked (connection, FALSE, NULL); } else { g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CLOSED, _("The connection is closed")); } CONNECTION_UNLOCK (connection); return ret;}/* ---------------------------------------------------------------------------------------------------- */static gbooleang_dbus_connection_send_message_unlocked (GDBusConnection *connection, GDBusMessage *message, GDBusSendMessageFlags flags, volatile guint32 *out_serial, GError **error){ guchar *blob; gsize blob_size; guint32 serial_to_use; gboolean ret; CONNECTION_ENSURE_LOCK (connection); g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), FALSE); /* TODO: check all necessary headers are present */ ret = FALSE; blob = NULL; if (out_serial != NULL) *out_serial = 0; if (connection->closed) { g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CLOSED, _("The connection is closed")); goto out; } blob = g_dbus_message_to_blob (message, &blob_size, connection->capabilities, error); if (blob == NULL) goto out; if (flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL) serial_to_use = g_dbus_message_get_serial (message); else serial_to_use = ++connection->last_serial; /* TODO: handle overflow */ switch (blob[0]) { case 'l': ((guint32 *) blob)[2] = GUINT32_TO_LE (serial_to_use); break; case 'B': ((guint32 *) blob)[2] = GUINT32_TO_BE (serial_to_use); break; default: g_assert_not_reached (); break; }#if 0 g_printerr ("Writing message of %" G_GSIZE_FORMAT " bytes (serial %d) on %p:\n", blob_size, serial_to_use, connection); g_printerr ("----\n"); hexdump (blob, blob_size); g_printerr ("----\n");#endif /* TODO: use connection->auth to encode the blob */ if (out_serial != NULL) *out_serial = serial_to_use; if (!(flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL)) g_dbus_message_set_serial (message, serial_to_use); g_dbus_message_lock (message); _g_dbus_worker_send_message (connection->worker, message, (gchar*) blob, blob_size); blob = NULL; /* since _g_dbus_worker_send_message() steals the blob */ ret = TRUE; out: g_free (blob); return ret;}/** * g_dbus_connection_send_message: * @connection: A #GDBusConnection. * @message: A #GDBusMessage * @flags: Flags affecting how the message is sent. * @out_serial: Return location for serial number assigned to @message when sending it or %NULL. * @error: Return location for error or %NULL. * * Asynchronously sends @message to the peer represented by @connection. * * Unless @flags contain the * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag, the serial number * will be assigned by @connection and set on @message via * g_dbus_message_set_serial(). If @out_serial is not %NULL, then the * serial number used will be written to this location prior to * submitting the message to the underlying transport. * * If @connection is closed then the operation will fail with * %G_IO_ERROR_CLOSED. If @message is not well-formed, * the operation fails with %G_IO_ERROR_INVALID_ARGUMENT. * * See <xref linkend="gdbus-server"/> and <xref * linkend="gdbus-unix-fd-client"/> for an example of how to use this * low-level API to send and receive UNIX file descriptors. * * Note that @message must be unlocked, unless @flags contain the * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag. * * Returns: %TRUE if the message was well-formed and queued for * transmission, %FALSE if @error is set. * * Since: 2.26 */gbooleang_dbus_connection_send_message (GDBusConnection *connection, GDBusMessage *message, GDBusSendMessageFlags flags, volatile guint32 *out_serial, GError **error){ gboolean ret; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), FALSE); g_return_val_if_fail ((flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL) || !g_dbus_message_get_locked (message), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); CONNECTION_LOCK (connection); ret = g_dbus_connection_send_message_unlocked (connection, message, flags, out_serial, error); CONNECTION_UNLOCK (connection); return ret;}/* ---------------------------------------------------------------------------------------------------- */typedef struct{ volatile gint ref_count; GDBusConnection *connection; guint32 serial; GSimpleAsyncResult *simple; GMainContext *main_context; GCancellable *cancellable; gulong cancellable_handler_id; GSource *timeout_source; gboolean delivered;} SendMessageData;static SendMessageData *send_message_data_ref (SendMessageData *data){ g_atomic_int_inc (&data->ref_count); return data;}static voidsend_message_data_unref (SendMessageData *data){ if (g_atomic_int_dec_and_test (&data->ref_count)) { g_assert (data->timeout_source == NULL); g_assert (data->simple == NULL); g_assert (data->cancellable_handler_id == 0); g_object_unref (data->connection); if (data->cancellable != NULL) g_object_unref (data->cancellable); if (data->main_context != NULL) g_main_context_unref (data->main_context); g_free (data); }}/* ---------------------------------------------------------------------------------------------------- *//* can be called from any thread with lock held - caller must have prepared GSimpleAsyncResult already */static voidsend_message_with_reply_deliver (SendMessageData *data){ CONNECTION_ENSURE_LOCK (data->connection); g_assert (!data->delivered); data->delivered = TRUE; g_simple_async_result_complete_in_idle (data->simple); g_object_unref (data->simple); data->simple = NULL; if (data->timeout_source != NULL) { g_source_destroy (data->timeout_source); data->timeout_source = NULL; } if (data->cancellable_handler_id > 0) { g_cancellable_disconnect (data->cancellable, data->cancellable_handler_id); data->cancellable_handler_id = 0; } g_warn_if_fail (g_hash_table_remove (data->connection->map_method_serial_to_send_message_data, GUINT_TO_POINTER (data->serial))); send_message_data_unref (data);}/* ---------------------------------------------------------------------------------------------------- *//* must hold lock */static voidsend_message_data_deliver_reply_unlocked (SendMessageData *data, GDBusMessage *reply){ if (data->delivered) goto out; g_simple_async_result_set_op_res_gpointer (data->simple, g_object_ref (reply), g_object_unref); send_message_with_reply_deliver (data); out: ;}/* ---------------------------------------------------------------------------------------------------- */static gbooleansend_message_with_reply_cancelled_idle_cb (gpointer user_data){ SendMessageData *data = user_data; CONNECTION_LOCK (data->connection); if (data->delivered) goto out; g_simple_async_result_set_error (data->simple, G_IO_ERROR, G_IO_ERROR_CANCELLED, _("Operation was cancelled")); send_message_with_reply_deliver (data); out: CONNECTION_UNLOCK (data->connection); return FALSE;}/* Can be called from any thread with or without lock held */static voidsend_message_with_reply_cancelled_cb (GCancellable *cancellable, gpointer user_data){ SendMessageData *data = user_data; GSource *idle_source; /* postpone cancellation to idle handler since we may be called directly * via g_cancellable_connect() (e.g. holding lock) */ idle_source = g_idle_source_new (); g_source_set_priority (idle_source, G_PRIORITY_DEFAULT); g_source_set_callback (idle_source, send_message_with_reply_cancelled_idle_cb, send_message_data_ref (data), (GDestroyNotify) send_message_data_unref); g_source_attach (idle_source, data->main_context); g_source_unref (idle_source);}/* ---------------------------------------------------------------------------------------------------- */static gbooleansend_message_with_reply_timeout_cb (gpointer user_data){ SendMessageData *data = user_data; CONNECTION_LOCK (data->connection); if (data->delivered) goto out; g_simple_async_result_set_error (data->simple, G_IO_ERROR, G_IO_ERROR_TIMED_OUT, _("Timeout was reached")); send_message_with_reply_deliver (data); out: CONNECTION_UNLOCK (data->connection); return FALSE;}/* ---------------------------------------------------------------------------------------------------- */static voidg_dbus_connection_send_message_with_reply_unlocked (GDBusConnection *connection, GDBusMessage *message, GDBusSendMessageFlags flags, gint timeout_msec, volatile guint32 *out_serial, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data){ GSimpleAsyncResult *simple; SendMessageData *data; GError *error; volatile guint32 serial; data = NULL; if (out_serial == NULL) out_serial = &serial; if (timeout_msec == -1) timeout_msec = 25 * 1000; simple = g_simple_async_result_new (G_OBJECT (connection), callback, user_data, g_dbus_connection_send_message_with_reply); if (g_cancellable_is_cancelled (cancellable)) { g_simple_async_result_set_error (simple, G_IO_ERROR, G_IO_ERROR_CANCELLED, _("Operation was cancelled")); g_simple_async_result_complete_in_idle (simple); g_object_unref (simple); goto out; } if (connection->closed) { g_simple_async_result_set_error (simple, G_IO_ERROR, G_IO_ERROR_CLOSED, _("The connection is closed")); g_simple_async_result_complete_in_idle (simple); g_object_unref (simple); goto out; } error = NULL; if (!g_dbus_connection_send_message_unlocked (connection, message, flags, out_serial, &error)) { g_simple_async_result_take_error (simple, error); g_simple_async_result_complete_in_idle (simple); g_object_unref (simple); goto out; } data = g_new0 (SendMessageData, 1); data->ref_count = 1; data->connection = g_object_ref (connection); data->simple = simple; data->serial = *out_serial; data->main_context = g_main_context_get_thread_default (); if (data->main_context != NULL) g_main_context_ref (data->main_context); if (cancellable != NULL) { data->cancellable = g_object_ref (cancellable); data->cancellable_handler_id = g_cancellable_connect (cancellable, G_CALLBACK (send_message_with_reply_cancelled_cb), send_message_data_ref (data), (GDestroyNotify) send_message_data_unref); g_object_set_data_full (G_OBJECT (simple), "cancellable", g_object_ref (cancellable), (GDestroyNotify) g_object_unref); } if (timeout_msec != G_MAXINT) { data->timeout_source = g_timeout_source_new (timeout_msec); g_source_set_priority (data->timeout_source, G_PRIORITY_DEFAULT); g_source_set_callback (data->timeout_source, send_message_with_reply_timeout_cb, send_message_data_ref (data), (GDestroyNotify) send_message_data_unref); g_source_attach (data->timeout_source, data->main_context); g_source_unref (data->timeout_source); } g_hash_table_insert (connection->map_method_serial_to_send_message_data, GUINT_TO_POINTER (*out_serial), data); out: ;}/** * g_dbus_connection_send_message_with_reply: * @connection: A #GDBusConnection. * @message: A #GDBusMessage. * @flags: Flags affecting how the message is sent. * @timeout_msec: The timeout in milliseconds, -1 to use the default * timeout or %G_MAXINT for no timeout. * @out_serial: Return location for serial number assigned to @message when sending it or %NULL. * @cancellable: A #GCancellable or %NULL. * @callback: A #GAsyncReadyCallback to call when the request is satisfied or %NULL if you don't * care about the result. * @user_data: The data to pass to @callback. * * Asynchronously sends @message to the peer represented by @connection. * * Unless @flags contain the * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag, the serial number * will be assigned by @connection and set on @message via * g_dbus_message_set_serial(). If @out_serial is not %NULL, then the * serial number used will be written to this location prior to * submitting the message to the underlying transport. * * If @connection is closed then the operation will fail with * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the operation will * fail with %G_IO_ERROR_CANCELLED. If @message is not well-formed, * the operation fails with %G_IO_ERROR_INVALID_ARGUMENT. * * This is an asynchronous method. When the operation is finished, @callback will be invoked * in the <link linkend="g-main-context-push-thread-default">thread-default main loop</link> * of the thread you are calling this method from. You can then call * g_dbus_connection_send_message_with_reply_finish() to get the result of the operation. * See g_dbus_connection_send_message_with_reply_sync() for the synchronous version. * * Note that @message must be unlocked, unless @flags contain the * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag. * * See <xref linkend="gdbus-server"/> and <xref * linkend="gdbus-unix-fd-client"/> for an example of how to use this * low-level API to send and receive UNIX file descriptors. * * Since: 2.26 */voidg_dbus_connection_send_message_with_reply (GDBusConnection *connection, GDBusMessage *message, GDBusSendMessageFlags flags, gint timeout_msec, volatile guint32 *out_serial, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data){ g_return_if_fail (G_IS_DBUS_CONNECTION (connection)); g_return_if_fail (G_IS_DBUS_MESSAGE (message)); g_return_if_fail ((flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL) || !g_dbus_message_get_locked (message)); g_return_if_fail (timeout_msec >= 0 || timeout_msec == -1); CONNECTION_LOCK (connection); g_dbus_connection_send_message_with_reply_unlocked (connection, message, flags, timeout_msec, out_serial, cancellable, callback, user_data); CONNECTION_UNLOCK (connection);}/** * g_dbus_connection_send_message_with_reply_finish: * @connection: a #GDBusConnection * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_send_message_with_reply(). * @error: Return location for error or %NULL. * * Finishes an operation started with g_dbus_connection_send_message_with_reply(). * * Note that @error is only set if a local in-process error * occured. That is to say that the returned #GDBusMessage object may * be of type %G_DBUS_MESSAGE_TYPE_ERROR. Use * g_dbus_message_to_gerror() to transcode this to a #GError. * * See <xref linkend="gdbus-server"/> and <xref * linkend="gdbus-unix-fd-client"/> for an example of how to use this * low-level API to send and receive UNIX file descriptors. * * Returns: (transfer full): A locked #GDBusMessage or %NULL if @error is set. * * Since: 2.26 */GDBusMessage *g_dbus_connection_send_message_with_reply_finish (GDBusConnection *connection, GAsyncResult *res, GError **error){ GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res); GDBusMessage *reply; GCancellable *cancellable; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); reply = NULL; g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_dbus_connection_send_message_with_reply); if (g_simple_async_result_propagate_error (simple, error)) goto out; reply = g_object_ref (g_simple_async_result_get_op_res_gpointer (simple)); cancellable = g_object_get_data (G_OBJECT (simple), "cancellable"); if (cancellable != NULL && g_cancellable_is_cancelled (cancellable)) { g_object_unref (reply); reply = NULL; g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CANCELLED, _("Operation was cancelled")); } out: return reply;}/* ---------------------------------------------------------------------------------------------------- */typedef struct{ GAsyncResult *res; GMainContext *context; GMainLoop *loop;} SendMessageSyncData;static voidsend_message_with_reply_sync_cb (GDBusConnection *connection, GAsyncResult *res, gpointer user_data){ SendMessageSyncData *data = user_data; data->res = g_object_ref (res); g_main_loop_quit (data->loop);}/** * g_dbus_connection_send_message_with_reply_sync: * @connection: A #GDBusConnection. * @message: A #GDBusMessage. * @flags: Flags affecting how the message is sent. * @timeout_msec: The timeout in milliseconds, -1 to use the default * timeout or %G_MAXINT for no timeout. * @out_serial: Return location for serial number assigned to @message when sending it or %NULL. * @cancellable: A #GCancellable or %NULL. * @error: Return location for error or %NULL. * * Synchronously sends @message to the peer represented by @connection * and blocks the calling thread until a reply is received or the * timeout is reached. See g_dbus_connection_send_message_with_reply() * for the asynchronous version of this method. * * Unless @flags contain the * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag, the serial number * will be assigned by @connection and set on @message via * g_dbus_message_set_serial(). If @out_serial is not %NULL, then the * serial number used will be written to this location prior to * submitting the message to the underlying transport. * * If @connection is closed then the operation will fail with * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the operation will * fail with %G_IO_ERROR_CANCELLED. If @message is not well-formed, * the operation fails with %G_IO_ERROR_INVALID_ARGUMENT. * * Note that @error is only set if a local in-process error * occured. That is to say that the returned #GDBusMessage object may * be of type %G_DBUS_MESSAGE_TYPE_ERROR. Use * g_dbus_message_to_gerror() to transcode this to a #GError. * * See <xref linkend="gdbus-server"/> and <xref * linkend="gdbus-unix-fd-client"/> for an example of how to use this * low-level API to send and receive UNIX file descriptors. * * Note that @message must be unlocked, unless @flags contain the * %G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag. * * Returns: (transfer full): A locked #GDBusMessage that is the reply to @message or %NULL if @error is set. * * Since: 2.26 */GDBusMessage *g_dbus_connection_send_message_with_reply_sync (GDBusConnection *connection, GDBusMessage *message, GDBusSendMessageFlags flags, gint timeout_msec, volatile guint32 *out_serial, GCancellable *cancellable, GError **error){ SendMessageSyncData *data; GDBusMessage *reply; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL); g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL); g_return_val_if_fail ((flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL) || !g_dbus_message_get_locked (message), FALSE); g_return_val_if_fail (timeout_msec >= 0 || timeout_msec == -1, NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); data = g_new0 (SendMessageSyncData, 1); data->context = g_main_context_new (); data->loop = g_main_loop_new (data->context, FALSE); g_main_context_push_thread_default (data->context); g_dbus_connection_send_message_with_reply (connection, message, flags, timeout_msec, out_serial, cancellable, (GAsyncReadyCallback) send_message_with_reply_sync_cb, data); g_main_loop_run (data->loop); reply = g_dbus_connection_send_message_with_reply_finish (connection, data->res, error); g_main_context_pop_thread_default (data->context); g_main_context_unref (data->context); g_main_loop_unref (data->loop); g_object_unref (data->res); g_free (data); return reply;}/* ---------------------------------------------------------------------------------------------------- */typedef struct{ GDBusMessageFilterFunction func; gpointer user_data;} FilterCallback;typedef struct{ guint id; GDBusMessageFilterFunction filter_function; gpointer user_data; GDestroyNotify user_data_free_func;} FilterData;/* Called in worker's thread - we must not block */static voidon_worker_message_received (GDBusWorker *worker, GDBusMessage *message, gpointer user_data){ GDBusConnection *connection; FilterCallback *filters; gboolean consumed_by_filter; gboolean altered_by_filter; guint num_filters; guint n; gboolean alive; G_LOCK (message_bus_lock); alive = (g_hash_table_lookup (alive_connections, user_data) != NULL); if (!alive) { G_UNLOCK (message_bus_lock); return; } connection = G_DBUS_CONNECTION (user_data); g_object_ref (connection); G_UNLOCK (message_bus_lock); //g_debug ("in on_worker_message_received"); g_object_ref (message); g_dbus_message_lock (message); //g_debug ("boo ref_count = %d %p %p", G_OBJECT (connection)->ref_count, connection, connection->worker); /* First collect the set of callback functions */ CONNECTION_LOCK (connection); num_filters = connection->filters->len; filters = g_new0 (FilterCallback, num_filters); for (n = 0; n < num_filters; n++) { FilterData *data = connection->filters->pdata[n]; filters[n].func = data->filter_function; filters[n].user_data = data->user_data; } CONNECTION_UNLOCK (connection); /* then call the filters in order (without holding the lock) */ consumed_by_filter = FALSE; altered_by_filter = FALSE; for (n = 0; n < num_filters; n++) { message = filters[n].func (connection, message, TRUE, filters[n].user_data); if (message == NULL) break; g_dbus_message_lock (message); } /* Standard dispatch unless the filter ate the message - no need to * do anything if the message was altered */ if (message != NULL) { GDBusMessageType message_type; message_type = g_dbus_message_get_message_type (message); if (message_type == G_DBUS_MESSAGE_TYPE_METHOD_RETURN || message_type == G_DBUS_MESSAGE_TYPE_ERROR) { guint32 reply_serial; SendMessageData *send_message_data; reply_serial = g_dbus_message_get_reply_serial (message); CONNECTION_LOCK (connection); send_message_data = g_hash_table_lookup (connection->map_method_serial_to_send_message_data, GUINT_TO_POINTER (reply_serial)); if (send_message_data != NULL) { //g_debug ("delivering reply/error for serial %d for %p", reply_serial, connection); send_message_data_deliver_reply_unlocked (send_message_data, message); } else { //g_debug ("message reply/error for serial %d but no SendMessageData found for %p", reply_serial, connection); } CONNECTION_UNLOCK (connection); } else if (message_type == G_DBUS_MESSAGE_TYPE_SIGNAL) { CONNECTION_LOCK (connection); distribute_signals (connection, message); CONNECTION_UNLOCK (connection); } else if (message_type == G_DBUS_MESSAGE_TYPE_METHOD_CALL) { CONNECTION_LOCK (connection); distribute_method_call (connection, message); CONNECTION_UNLOCK (connection); } } if (message != NULL) g_object_unref (message); g_object_unref (connection); g_free (filters);}/* Called in worker's thread */static GDBusMessage *on_worker_message_about_to_be_sent (GDBusWorker *worker, GDBusMessage *message, gpointer user_data){ GDBusConnection *connection; FilterCallback *filters; guint num_filters; guint n; gboolean alive; G_LOCK (message_bus_lock); alive = (g_hash_table_lookup (alive_connections, user_data) != NULL); if (!alive) { G_UNLOCK (message_bus_lock); return message; } connection = G_DBUS_CONNECTION (user_data); g_object_ref (connection); G_UNLOCK (message_bus_lock); //g_debug ("in on_worker_message_about_to_be_sent"); /* First collect the set of callback functions */ CONNECTION_LOCK (connection); num_filters = connection->filters->len; filters = g_new0 (FilterCallback, num_filters); for (n = 0; n < num_filters; n++) { FilterData *data = connection->filters->pdata[n]; filters[n].func = data->filter_function; filters[n].user_data = data->user_data; } CONNECTION_UNLOCK (connection); /* then call the filters in order (without holding the lock) */ for (n = 0; n < num_filters; n++) { g_dbus_message_lock (message); message = filters[n].func (connection, message, FALSE, filters[n].user_data); if (message == NULL) break; } g_object_unref (connection); g_free (filters); return message;}/* Called in worker's thread - we must not block */static voidon_worker_closed (GDBusWorker *worker, gboolean remote_peer_vanished, GError *error, gpointer user_data){ GDBusConnection *connection; gboolean alive; G_LOCK (message_bus_lock); alive = (g_hash_table_lookup (alive_connections, user_data) != NULL); if (!alive) { G_UNLOCK (message_bus_lock); return; } connection = G_DBUS_CONNECTION (user_data); g_object_ref (connection); G_UNLOCK (message_bus_lock); //g_debug ("in on_worker_closed: %s", error->message); CONNECTION_LOCK (connection); if (!connection->closed) set_closed_unlocked (connection, remote_peer_vanished, error); CONNECTION_UNLOCK (connection); g_object_unref (connection);}/* ---------------------------------------------------------------------------------------------------- *//* Determines the biggest set of capabilities we can support on this connection */static GDBusCapabilityFlagsget_offered_capabilities_max (GDBusConnection *connection){ GDBusCapabilityFlags ret; ret = G_DBUS_CAPABILITY_FLAGS_NONE;#ifdef G_OS_UNIX if (G_IS_UNIX_CONNECTION (connection->stream)) ret |= G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING;#endif return ret;}static gbooleaninitable_init (GInitable *initable, GCancellable *cancellable, GError **error){ GDBusConnection *connection = G_DBUS_CONNECTION (initable); gboolean ret; /* This method needs to be idempotent to work with the singleton * pattern. See the docs for g_initable_init(). We implement this by * locking. * * Unfortunately we can't use the main lock since the on_worker_*() * callbacks above needs the lock during initialization (for message * bus connections we do a synchronous Hello() call on the bus). */ g_mutex_lock (connection->init_lock); ret = FALSE; if (connection->is_initialized) { if (connection->stream != NULL) ret = TRUE; else g_assert (connection->initialization_error != NULL); goto out; } g_assert (connection->initialization_error == NULL); /* The user can pass multiple (but mutally exclusive) construct * properties: * * - stream (of type GIOStream) * - address (of type gchar*) * * At the end of the day we end up with a non-NULL GIOStream * object in connection->stream. */ if (connection->address != NULL) { g_assert (connection->stream == NULL); if ((connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER) || (connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS)) { g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Unsupported flags encountered when constructing a client-side connection")); goto out; } connection->stream = g_dbus_address_get_stream_sync (connection->address, NULL, /* TODO: out_guid */ cancellable, &connection->initialization_error); if (connection->stream == NULL) goto out; } else if (connection->stream != NULL) { /* nothing to do */ } else { g_assert_not_reached (); } /* Authenticate the connection */ if (connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER) { g_assert (!(connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT)); g_assert (connection->guid != NULL); connection->auth = _g_dbus_auth_new (connection->stream); if (!_g_dbus_auth_run_server (connection->auth, connection->authentication_observer, connection->guid, (connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS), get_offered_capabilities_max (connection), &connection->capabilities, &connection->credentials, cancellable, &connection->initialization_error)) goto out; } else if (connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT) { g_assert (!(connection->flags & G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER)); g_assert (connection->guid == NULL); connection->auth = _g_dbus_auth_new (connection->stream); connection->guid = _g_dbus_auth_run_client (connection->auth, get_offered_capabilities_max (connection), &connection->capabilities, cancellable, &connection->initialization_error); if (connection->guid == NULL) goto out; } if (connection->authentication_observer != NULL) { g_object_unref (connection->authentication_observer); connection->authentication_observer = NULL; } //g_output_stream_flush (G_SOCKET_CONNECTION (connection->stream) //g_debug ("haz unix fd passing powers: %d", connection->capabilities & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING);#ifdef G_OS_UNIX /* Hack used until * * https://bugzilla.gnome.org/show_bug.cgi?id=616458 * * has been resolved */ if (G_IS_SOCKET_CONNECTION (connection->stream)) { g_socket_set_blocking (g_socket_connection_get_socket (G_SOCKET_CONNECTION (connection->stream)), FALSE); }#endif G_LOCK (message_bus_lock); if (alive_connections == NULL) alive_connections = g_hash_table_new (g_direct_hash, g_direct_equal); g_hash_table_insert (alive_connections, connection, connection); G_UNLOCK (message_bus_lock); connection->worker = _g_dbus_worker_new (connection->stream, connection->capabilities, (connection->flags & G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING), on_worker_message_received, on_worker_message_about_to_be_sent, on_worker_closed, connection); /* if a bus connection, call org.freedesktop.DBus.Hello - this is how we're getting a name */ if (connection->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION) { GVariant *hello_result; /* we could lift this restriction by adding code in gdbusprivate.c */ if (connection->flags & G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING) { g_set_error_literal (&connection->initialization_error, G_IO_ERROR, G_IO_ERROR_FAILED, "Cannot use DELAY_MESSAGE_PROCESSING with MESSAGE_BUS_CONNECTION"); goto out; } hello_result = g_dbus_connection_call_sync (connection, "org.freedesktop.DBus", /* name */ "/org/freedesktop/DBus", /* path */ "org.freedesktop.DBus", /* interface */ "Hello", NULL, /* parameters */ G_VARIANT_TYPE ("(s)"), G_DBUS_CALL_FLAGS_NONE, -1, NULL, /* TODO: cancellable */ &connection->initialization_error); if (hello_result == NULL) goto out; g_variant_get (hello_result, "(s)", &connection->bus_unique_name); g_variant_unref (hello_result); //g_debug ("unique name is `%s'", connection->bus_unique_name); } connection->is_initialized = TRUE; ret = TRUE; out: if (!ret) { g_assert (connection->initialization_error != NULL); g_propagate_error (error, g_error_copy (connection->initialization_error)); } g_mutex_unlock (connection->init_lock); return ret;}static voidinitable_iface_init (GInitableIface *initable_iface){ initable_iface->init = initable_init;}/* ---------------------------------------------------------------------------------------------------- */static voidasync_initable_iface_init (GAsyncInitableIface *async_initable_iface){ /* Use default */}/* ---------------------------------------------------------------------------------------------------- *//** * g_dbus_connection_new: * @stream: A #GIOStream. * @guid: The GUID to use if a authenticating as a server or %NULL. * @flags: Flags describing how to make the connection. * @observer: A #GDBusAuthObserver or %NULL. * @cancellable: A #GCancellable or %NULL. * @callback: A #GAsyncReadyCallback to call when the request is satisfied. * @user_data: The data to pass to @callback. * * Asynchronously sets up a D-Bus connection for exchanging D-Bus messages * with the end represented by @stream. * * If @observer is not %NULL it may be used to control the * authentication process. * * When the operation is finished, @callback will be invoked. You can * then call g_dbus_connection_new_finish() to get the result of the * operation. * * This is a asynchronous failable constructor. See * g_dbus_connection_new_sync() for the synchronous * version. * * Since: 2.26 */voidg_dbus_connection_new (GIOStream *stream, const gchar *guid, GDBusConnectionFlags flags, GDBusAuthObserver *observer, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data){ g_return_if_fail (G_IS_IO_STREAM (stream)); g_async_initable_new_async (G_TYPE_DBUS_CONNECTION, G_PRIORITY_DEFAULT, cancellable, callback, user_data, "stream", stream, "guid", guid, "flags", flags, "authentication-observer", observer, NULL);}/** * g_dbus_connection_new_finish: * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_new(). * @error: Return location for error or %NULL. * * Finishes an operation started with g_dbus_connection_new(). * * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref(). * * Since: 2.26 */GDBusConnection *g_dbus_connection_new_finish (GAsyncResult *res, GError **error){ GObject *object; GObject *source_object; g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); source_object = g_async_result_get_source_object (res); g_assert (source_object != NULL); object = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object), res, error); g_object_unref (source_object); if (object != NULL) return G_DBUS_CONNECTION (object); else return NULL;}/** * g_dbus_connection_new_sync: * @stream: A #GIOStream. * @guid: The GUID to use if a authenticating as a server or %NULL. * @flags: Flags describing how to make the connection. * @observer: A #GDBusAuthObserver or %NULL. * @cancellable: A #GCancellable or %NULL. * @error: Return location for error or %NULL. * * Synchronously sets up a D-Bus connection for exchanging D-Bus messages * with the end represented by @stream. * * If @observer is not %NULL it may be used to control the * authentication process. * * This is a synchronous failable constructor. See * g_dbus_connection_new() for the asynchronous version. * * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref(). * * Since: 2.26 */GDBusConnection *g_dbus_connection_new_sync (GIOStream *stream, const gchar *guid, GDBusConnectionFlags flags, GDBusAuthObserver *observer, GCancellable *cancellable, GError **error){ g_return_val_if_fail (G_IS_IO_STREAM (stream), NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); return g_initable_new (G_TYPE_DBUS_CONNECTION, cancellable, error, "stream", stream, "guid", guid, "flags", flags, "authentication-observer", observer, NULL);}/* ---------------------------------------------------------------------------------------------------- *//** * g_dbus_connection_new_for_address: * @address: A D-Bus address. * @flags: Flags describing how to make the connection. * @observer: A #GDBusAuthObserver or %NULL. * @cancellable: A #GCancellable or %NULL. * @callback: A #GAsyncReadyCallback to call when the request is satisfied. * @user_data: The data to pass to @callback. * * Asynchronously connects and sets up a D-Bus client connection for * exchanging D-Bus messages with an endpoint specified by @address * which must be in the D-Bus address format. * * This constructor can only be used to initiate client-side * connections - use g_dbus_connection_new() if you need to act as the * server. In particular, @flags cannot contain the * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER or * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS flags. * * When the operation is finished, @callback will be invoked. You can * then call g_dbus_connection_new_finish() to get the result of the * operation. * * If @observer is not %NULL it may be used to control the * authentication process. * * This is a asynchronous failable constructor. See * g_dbus_connection_new_for_address_sync() for the synchronous * version. * * Since: 2.26 */voidg_dbus_connection_new_for_address (const gchar *address, GDBusConnectionFlags flags, GDBusAuthObserver *observer, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data){ g_return_if_fail (address != NULL); g_async_initable_new_async (G_TYPE_DBUS_CONNECTION, G_PRIORITY_DEFAULT, cancellable, callback, user_data, "address", address, "flags", flags, "authentication-observer", observer, NULL);}/** * g_dbus_connection_new_for_address_finish: * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_new(). * @error: Return location for error or %NULL. * * Finishes an operation started with g_dbus_connection_new_for_address(). * * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref(). * * Since: 2.26 */GDBusConnection *g_dbus_connection_new_for_address_finish (GAsyncResult *res, GError **error){ GObject *object; GObject *source_object; g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); source_object = g_async_result_get_source_object (res); g_assert (source_object != NULL); object = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object), res, error); g_object_unref (source_object); if (object != NULL) return G_DBUS_CONNECTION (object); else return NULL;}/** * g_dbus_connection_new_for_address_sync: * @address: A D-Bus address. * @flags: Flags describing how to make the connection. * @observer: A #GDBusAuthObserver or %NULL. * @cancellable: A #GCancellable or %NULL. * @error: Return location for error or %NULL. * * Synchronously connects and sets up a D-Bus client connection for * exchanging D-Bus messages with an endpoint specified by @address * which must be in the D-Bus address format. * * This constructor can only be used to initiate client-side * connections - use g_dbus_connection_new_sync() if you need to act * as the server. In particular, @flags cannot contain the * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER or * %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS flags. * * This is a synchronous failable constructor. See * g_dbus_connection_new_for_address() for the asynchronous version. * * If @observer is not %NULL it may be used to control the * authentication process. * * Returns: A #GDBusConnection or %NULL if @error is set. Free with g_object_unref(). * * Since: 2.26 */GDBusConnection *g_dbus_connection_new_for_address_sync (const gchar *address, GDBusConnectionFlags flags, GDBusAuthObserver *observer, GCancellable *cancellable, GError **error){ g_return_val_if_fail (address != NULL, NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); return g_initable_new (G_TYPE_DBUS_CONNECTION, cancellable, error, "address", address, "flags", flags, "authentication-observer", observer, NULL);}/* ---------------------------------------------------------------------------------------------------- *//** * g_dbus_connection_set_exit_on_close: * @connection: A #GDBusConnection. * @exit_on_close: Whether the process should be terminated * when @connection is closed by the remote peer. * * Sets whether the process should be terminated when @connection is * closed by the remote peer. See #GDBusConnection:exit-on-close for * more details. * * Since: 2.26 */voidg_dbus_connection_set_exit_on_close (GDBusConnection *connection, gboolean exit_on_close){ g_return_if_fail (G_IS_DBUS_CONNECTION (connection)); connection->exit_on_close = exit_on_close;}/** * g_dbus_connection_get_exit_on_close: * @connection: A #GDBusConnection. * * Gets whether the process is terminated when @connection is * closed by the remote peer. See * #GDBusConnection:exit-on-close for more details. * * Returns: Whether the process is terminated when @connection is * closed by the remote peer. * * Since: 2.26 */gbooleang_dbus_connection_get_exit_on_close (GDBusConnection *connection){ g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); return connection->exit_on_close;}/** * g_dbus_connection_get_guid: * @connection: A #GDBusConnection. * * The GUID of the peer performing the role of server when * authenticating. See #GDBusConnection:guid for more details. * * Returns: The GUID. Do not free this string, it is owned by * @connection. * * Since: 2.26 */const gchar *g_dbus_connection_get_guid (GDBusConnection *connection){ g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL); return connection->guid;}/** * g_dbus_connection_get_unique_name: * @connection: A #GDBusConnection. * * Gets the unique name of @connection as assigned by the message * bus. This can also be used to figure out if @connection is a * message bus connection. * * Returns: The unique name or %NULL if @connection is not a message * bus connection. Do not free this string, it is owned by * @connection. * * Since: 2.26 */const gchar *g_dbus_connection_get_unique_name (GDBusConnection *connection){ g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL); return connection->bus_unique_name;}/** * g_dbus_connection_get_peer_credentials: * @connection: A #GDBusConnection. * * Gets the credentials of the authenticated peer. This will always * return %NULL unless @connection acted as a server * (e.g. %G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER was passed) * when set up and the client passed credentials as part of the * authentication process. * * In a message bus setup, the message bus is always the server and * each application is a client. So this method will always return * %NULL for message bus clients. * * Returns: (transfer none): A #GCredentials or %NULL if not available. Do not free * this object, it is owned by @connection. * * Since: 2.26 */GCredentials *g_dbus_connection_get_peer_credentials (GDBusConnection *connection){ g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL); return connection->credentials;}/* ---------------------------------------------------------------------------------------------------- */static guint _global_filter_id = 1;/** * g_dbus_connection_add_filter: * @connection: A #GDBusConnection. * @filter_function: A filter function. * @user_data: User data to pass to @filter_function. * @user_data_free_func: Function to free @user_data with when filter * is removed or %NULL. * * Adds a message filter. Filters are handlers that are run on all * incoming and outgoing messages, prior to standard dispatch. Filters * are run in the order that they were added. The same handler can be * added as a filter more than once, in which case it will be run more * than once. Filters added during a filter callback won't be run on * the message being processed. Filter functions are allowed to modify * and even drop messages - see the #GDBusMessageFilterResult * enumeration for details. * * Note that filters are run in a dedicated message handling thread so * they can't block and, generally, can't do anything but signal a * worker thread. Also note that filters are rarely needed - use API * such as g_dbus_connection_send_message_with_reply(), * g_dbus_connection_signal_subscribe() or * g_dbus_connection_call() instead. * * If a filter consumes an incoming message the message is not * dispatched anywhere else - not even the standard dispatch machinery * (that API such as g_dbus_connection_signal_subscribe() and * g_dbus_connection_send_message_with_reply() relies on) will see the * message. Similary, if a filter consumes an outgoing message, the * message will not be sent to the other peer. * * Returns: A filter identifier that can be used with * g_dbus_connection_remove_filter(). * * Since: 2.26 */guintg_dbus_connection_add_filter (GDBusConnection *connection, GDBusMessageFilterFunction filter_function, gpointer user_data, GDestroyNotify user_data_free_func){ FilterData *data; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0); g_return_val_if_fail (filter_function != NULL, 0); CONNECTION_LOCK (connection); data = g_new0 (FilterData, 1); data->id = _global_filter_id++; /* TODO: overflow etc. */ data->filter_function = filter_function; data->user_data = user_data; data->user_data_free_func = user_data_free_func; g_ptr_array_add (connection->filters, data); CONNECTION_UNLOCK (connection); return data->id;}/* only called from finalize(), removes all filters */static voidpurge_all_filters (GDBusConnection *connection){ guint n; for (n = 0; n < connection->filters->len; n++) { FilterData *data = connection->filters->pdata[n]; if (data->user_data_free_func != NULL) data->user_data_free_func (data->user_data); g_free (data); }}/** * g_dbus_connection_remove_filter: * @connection: a #GDBusConnection * @filter_id: an identifier obtained from g_dbus_connection_add_filter() * * Removes a filter. * * Since: 2.26 */voidg_dbus_connection_remove_filter (GDBusConnection *connection, guint filter_id){ guint n; FilterData *to_destroy; g_return_if_fail (G_IS_DBUS_CONNECTION (connection)); CONNECTION_LOCK (connection); to_destroy = NULL; for (n = 0; n < connection->filters->len; n++) { FilterData *data = connection->filters->pdata[n]; if (data->id == filter_id) { g_ptr_array_remove_index (connection->filters, n); to_destroy = data; break; } } CONNECTION_UNLOCK (connection); /* do free without holding lock */ if (to_destroy != NULL) { if (to_destroy->user_data_free_func != NULL) to_destroy->user_data_free_func (to_destroy->user_data); g_free (to_destroy); } else { g_warning ("g_dbus_connection_remove_filter: No filter found for filter_id %d", filter_id); }}/* ---------------------------------------------------------------------------------------------------- */typedef struct{ gchar *rule; gchar *sender; gchar *sender_unique_name; /* if sender is unique or org.freedesktop.DBus, then that name... otherwise blank */ gchar *interface_name; gchar *member; gchar *object_path; gchar *arg0; GArray *subscribers;} SignalData;typedef struct{ GDBusSignalCallback callback; gpointer user_data; GDestroyNotify user_data_free_func; guint id; GMainContext *context;} SignalSubscriber;static voidsignal_data_free (SignalData *signal_data){ g_free (signal_data->rule); g_free (signal_data->sender); g_free (signal_data->sender_unique_name); g_free (signal_data->interface_name); g_free (signal_data->member); g_free (signal_data->object_path); g_free (signal_data->arg0); g_array_free (signal_data->subscribers, TRUE); g_free (signal_data);}static gchar *args_to_rule (const gchar *sender, const gchar *interface_name, const gchar *member, const gchar *object_path, const gchar *arg0, gboolean negate){ GString *rule; rule = g_string_new ("type='signal'"); if (negate) g_string_prepend_c (rule, '-'); if (sender != NULL) g_string_append_printf (rule, ",sender='%s'", sender); if (interface_name != NULL) g_string_append_printf (rule, ",interface='%s'", interface_name); if (member != NULL) g_string_append_printf (rule, ",member='%s'", member); if (object_path != NULL) g_string_append_printf (rule, ",path='%s'", object_path); if (arg0 != NULL) g_string_append_printf (rule, ",arg0='%s'", arg0); return g_string_free (rule, FALSE);}static guint _global_subscriber_id = 1;static guint _global_registration_id = 1;static guint _global_subtree_registration_id = 1;/* ---------------------------------------------------------------------------------------------------- *//* must hold lock when calling */static voidadd_match_rule (GDBusConnection *connection, const gchar *match_rule){ GError *error; GDBusMessage *message; if (match_rule[0] == '-') return; message = g_dbus_message_new_method_call ("org.freedesktop.DBus", /* name */ "/org/freedesktop/DBus", /* path */ "org.freedesktop.DBus", /* interface */ "AddMatch"); g_dbus_message_set_body (message, g_variant_new ("(s)", match_rule)); error = NULL; if (!g_dbus_connection_send_message_unlocked (connection, message, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, &error)) { g_critical ("Error while sending AddMatch() message: %s", error->message); g_error_free (error); } g_object_unref (message);}/* ---------------------------------------------------------------------------------------------------- *//* must hold lock when calling */static voidremove_match_rule (GDBusConnection *connection, const gchar *match_rule){ GError *error; GDBusMessage *message; if (match_rule[0] == '-') return; message = g_dbus_message_new_method_call ("org.freedesktop.DBus", /* name */ "/org/freedesktop/DBus", /* path */ "org.freedesktop.DBus", /* interface */ "RemoveMatch"); g_dbus_message_set_body (message, g_variant_new ("(s)", match_rule)); error = NULL; if (!g_dbus_connection_send_message_unlocked (connection, message, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, &error)) { g_critical ("Error while sending RemoveMatch() message: %s", error->message); g_error_free (error); } g_object_unref (message);}/* ---------------------------------------------------------------------------------------------------- */static gbooleanis_signal_data_for_name_lost_or_acquired (SignalData *signal_data){ return g_strcmp0 (signal_data->sender_unique_name, "org.freedesktop.DBus") == 0 && g_strcmp0 (signal_data->interface_name, "org.freedesktop.DBus") == 0 && g_strcmp0 (signal_data->object_path, "/org/freedesktop/DBus") == 0 && (g_strcmp0 (signal_data->member, "NameLost") == 0 || g_strcmp0 (signal_data->member, "NameAcquired") == 0);}/* ---------------------------------------------------------------------------------------------------- *//** * g_dbus_connection_signal_subscribe: * @connection: A #GDBusConnection. * @sender: Sender name to match on (unique or well-known name) or %NULL to listen from all senders. * @interface_name: D-Bus interface name to match on or %NULL to match on all interfaces. * @member: D-Bus signal name to match on or %NULL to match on all signals. * @object_path: Object path to match on or %NULL to match on all object paths. * @arg0: Contents of first string argument to match on or %NULL to match on all kinds of arguments. * @flags: Flags describing how to subscribe to the signal (currently unused). * @callback: Callback to invoke when there is a signal matching the requested data. * @user_data: User data to pass to @callback. * @user_data_free_func: Function to free @user_data with when subscription is removed or %NULL. * * Subscribes to signals on @connection and invokes @callback with a * whenever the signal is received. Note that @callback * will be invoked in the <link * linkend="g-main-context-push-thread-default">thread-default main * loop</link> of the thread you are calling this method from. * * If @connection is not a message bus connection, @sender must be * %NULL. * * If @sender is a well-known name note that @callback is invoked with * the unique name for the owner of @sender, not the well-known name * as one would expect. This is because the message bus rewrites the * name. As such, to avoid certain race conditions, users should be * tracking the name owner of the well-known name and use that when * processing the received signal. * * Returns: A subscription identifier that can be used with g_dbus_connection_signal_unsubscribe(). * * Since: 2.26 */guintg_dbus_connection_signal_subscribe (GDBusConnection *connection, const gchar *sender, const gchar *interface_name, const gchar *member, const gchar *object_path, const gchar *arg0, GDBusSignalFlags flags, GDBusSignalCallback callback, gpointer user_data, GDestroyNotify user_data_free_func){ gchar *rule; SignalData *signal_data; SignalSubscriber subscriber; GPtrArray *signal_data_array; const gchar *sender_unique_name; /* Right now we abort if AddMatch() fails since it can only fail with the bus being in * an OOM condition. We might want to change that but that would involve making * g_dbus_connection_signal_subscribe() asynchronous and having the call sites * handle that. And there's really no sensible way of handling this short of retrying * to add the match rule... and then there's the little thing that, hey, maybe there's * a reason the bus in an OOM condition. * * Doable, but not really sure it's worth it... */ g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0); g_return_val_if_fail (sender == NULL || (g_dbus_is_name (sender) && (connection->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION)), 0); g_return_val_if_fail (interface_name == NULL || g_dbus_is_interface_name (interface_name), 0); g_return_val_if_fail (member == NULL || g_dbus_is_member_name (member), 0); g_return_val_if_fail (object_path == NULL || g_variant_is_object_path (object_path), 0); g_return_val_if_fail (callback != NULL, 0); CONNECTION_LOCK (connection); /* If G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE was specified, we will end up * with a '-' character to prefix the rule (which will otherwise be * normal). * * This allows us to hash the rule and do our lifecycle tracking in * the usual way, but the '-' prevents the match rule from ever * actually being send to the bus (either for add or remove). */ rule = args_to_rule (sender, interface_name, member, object_path, arg0, (flags & G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE) != 0); if (sender != NULL && (g_dbus_is_unique_name (sender) || g_strcmp0 (sender, "org.freedesktop.DBus") == 0)) sender_unique_name = sender; else sender_unique_name = ""; subscriber.callback = callback; subscriber.user_data = user_data; subscriber.user_data_free_func = user_data_free_func; subscriber.id = _global_subscriber_id++; /* TODO: overflow etc. */ subscriber.context = g_main_context_get_thread_default (); if (subscriber.context != NULL) g_main_context_ref (subscriber.context); /* see if we've already have this rule */ signal_data = g_hash_table_lookup (connection->map_rule_to_signal_data, rule); if (signal_data != NULL) { g_array_append_val (signal_data->subscribers, subscriber); g_free (rule); goto out; } signal_data = g_new0 (SignalData, 1); signal_data->rule = rule; signal_data->sender = g_strdup (sender); signal_data->sender_unique_name = g_strdup (sender_unique_name); signal_data->interface_name = g_strdup (interface_name); signal_data->member = g_strdup (member); signal_data->object_path = g_strdup (object_path); signal_data->arg0 = g_strdup (arg0); signal_data->subscribers = g_array_new (FALSE, FALSE, sizeof (SignalSubscriber)); g_array_append_val (signal_data->subscribers, subscriber); g_hash_table_insert (connection->map_rule_to_signal_data, signal_data->rule, signal_data); /* Add the match rule to the bus... * * Avoid adding match rules for NameLost and NameAcquired messages - the bus will * always send such messages to us. */ if (connection->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION) { if (!is_signal_data_for_name_lost_or_acquired (signal_data)) add_match_rule (connection, signal_data->rule); } signal_data_array = g_hash_table_lookup (connection->map_sender_unique_name_to_signal_data_array, signal_data->sender_unique_name); if (signal_data_array == NULL) { signal_data_array = g_ptr_array_new (); g_hash_table_insert (connection->map_sender_unique_name_to_signal_data_array, g_strdup (signal_data->sender_unique_name), signal_data_array); } g_ptr_array_add (signal_data_array, signal_data); out: g_hash_table_insert (connection->map_id_to_signal_data, GUINT_TO_POINTER (subscriber.id), signal_data); CONNECTION_UNLOCK (connection); return subscriber.id;}/* ---------------------------------------------------------------------------------------------------- *//* must hold lock when calling this (except if connection->finalizing is TRUE) */static voidunsubscribe_id_internal (GDBusConnection *connection, guint subscription_id, GArray *out_removed_subscribers){ SignalData *signal_data; GPtrArray *signal_data_array; guint n; signal_data = g_hash_table_lookup (connection->map_id_to_signal_data, GUINT_TO_POINTER (subscription_id)); if (signal_data == NULL) { /* Don't warn here, we may have thrown all subscriptions out when the connection was closed */ goto out; } for (n = 0; n < signal_data->subscribers->len; n++) { SignalSubscriber *subscriber; subscriber = &(g_array_index (signal_data->subscribers, SignalSubscriber, n)); if (subscriber->id != subscription_id) continue; g_warn_if_fail (g_hash_table_remove (connection->map_id_to_signal_data, GUINT_TO_POINTER (subscription_id))); g_array_append_val (out_removed_subscribers, *subscriber); g_array_remove_index (signal_data->subscribers, n); if (signal_data->subscribers->len == 0) { g_warn_if_fail (g_hash_table_remove (connection->map_rule_to_signal_data, signal_data->rule)); signal_data_array = g_hash_table_lookup (connection->map_sender_unique_name_to_signal_data_array, signal_data->sender_unique_name); g_warn_if_fail (signal_data_array != NULL); g_warn_if_fail (g_ptr_array_remove (signal_data_array, signal_data)); if (signal_data_array->len == 0) { g_warn_if_fail (g_hash_table_remove (connection->map_sender_unique_name_to_signal_data_array, signal_data->sender_unique_name)); } /* remove the match rule from the bus unless NameLost or NameAcquired (see subscribe()) */ if (connection->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION) { if (!is_signal_data_for_name_lost_or_acquired (signal_data)) if (!connection->closed && !connection->finalizing) remove_match_rule (connection, signal_data->rule); } signal_data_free (signal_data); } goto out; } g_assert_not_reached (); out: ;}/** * g_dbus_connection_signal_unsubscribe: * @connection: A #GDBusConnection. * @subscription_id: A subscription id obtained from g_dbus_connection_signal_subscribe(). * * Unsubscribes from signals. * * Since: 2.26 */voidg_dbus_connection_signal_unsubscribe (GDBusConnection *connection, guint subscription_id){ GArray *subscribers; guint n; g_return_if_fail (G_IS_DBUS_CONNECTION (connection)); subscribers = g_array_new (FALSE, FALSE, sizeof (SignalSubscriber)); CONNECTION_LOCK (connection); unsubscribe_id_internal (connection, subscription_id, subscribers); CONNECTION_UNLOCK (connection); /* invariant */ g_assert (subscribers->len == 0 || subscribers->len == 1); /* call GDestroyNotify without lock held */ for (n = 0; n < subscribers->len; n++) { SignalSubscriber *subscriber; subscriber = &(g_array_index (subscribers, SignalSubscriber, n)); call_destroy_notify (subscriber->context, subscriber->user_data_free_func, subscriber->user_data); if (subscriber->context != NULL) g_main_context_unref (subscriber->context); } g_array_free (subscribers, TRUE);}/* ---------------------------------------------------------------------------------------------------- */typedef struct{ guint subscription_id; GDBusSignalCallback callback; gpointer user_data; GDBusMessage *message; GDBusConnection *connection; const gchar *sender; const gchar *path; const gchar *interface; const gchar *member;} SignalInstance;/* called on delivery thread (e.g. where g_dbus_connection_signal_subscribe() was called) with * no locks held */static gbooleanemit_signal_instance_in_idle_cb (gpointer data){ SignalInstance *signal_instance = data; GVariant *parameters; gboolean has_subscription; parameters = g_dbus_message_get_body (signal_instance->message); if (parameters == NULL) { parameters = g_variant_new ("()"); g_variant_ref_sink (parameters); } else { g_variant_ref_sink (parameters); }#if 0 g_print ("in emit_signal_instance_in_idle_cb (id=%d sender=%s path=%s interface=%s member=%s params=%s)\n", signal_instance->subscription_id, signal_instance->sender, signal_instance->path, signal_instance->interface, signal_instance->member, g_variant_print (parameters, TRUE));#endif /* Careful here, don't do the callback if we no longer has the subscription */ CONNECTION_LOCK (signal_instance->connection); has_subscription = FALSE; if (g_hash_table_lookup (signal_instance->connection->map_id_to_signal_data, GUINT_TO_POINTER (signal_instance->subscription_id)) != NULL) has_subscription = TRUE; CONNECTION_UNLOCK (signal_instance->connection); if (has_subscription) signal_instance->callback (signal_instance->connection, signal_instance->sender, signal_instance->path, signal_instance->interface, signal_instance->member, parameters, signal_instance->user_data); if (parameters != NULL) g_variant_unref (parameters); return FALSE;}static voidsignal_instance_free (SignalInstance *signal_instance){ g_object_unref (signal_instance->message); g_object_unref (signal_instance->connection); g_free (signal_instance);}/* called in message handler thread WITH lock held */static voidschedule_callbacks (GDBusConnection *connection, GPtrArray *signal_data_array, GDBusMessage *message, const gchar *sender){ guint n, m; const gchar *interface; const gchar *member; const gchar *path; const gchar *arg0; interface = NULL; member = NULL; path = NULL; arg0 = NULL; interface = g_dbus_message_get_interface (message); member = g_dbus_message_get_member (message); path = g_dbus_message_get_path (message); arg0 = g_dbus_message_get_arg0 (message);#if 0 g_print ("In schedule_callbacks:\n" " sender = `%s'\n" " interface = `%s'\n" " member = `%s'\n" " path = `%s'\n" " arg0 = `%s'\n", sender, interface, member, path, arg0);#endif /* TODO: if this is slow, then we can change signal_data_array into * map_object_path_to_signal_data_array or something. */ for (n = 0; n < signal_data_array->len; n++) { SignalData *signal_data = signal_data_array->pdata[n]; if (signal_data->interface_name != NULL && g_strcmp0 (signal_data->interface_name, interface) != 0) continue; if (signal_data->member != NULL && g_strcmp0 (signal_data->member, member) != 0) continue; if (signal_data->object_path != NULL && g_strcmp0 (signal_data->object_path, path) != 0) continue; if (signal_data->arg0 != NULL && g_strcmp0 (signal_data->arg0, arg0) != 0) continue; for (m = 0; m < signal_data->subscribers->len; m++) { SignalSubscriber *subscriber; GSource *idle_source; SignalInstance *signal_instance; subscriber = &(g_array_index (signal_data->subscribers, SignalSubscriber, m)); signal_instance = g_new0 (SignalInstance, 1); signal_instance->subscription_id = subscriber->id; signal_instance->callback = subscriber->callback; signal_instance->user_data = subscriber->user_data; signal_instance->message = g_object_ref (message); signal_instance->connection = g_object_ref (connection); signal_instance->sender = sender; signal_instance->path = path; signal_instance->interface = interface; signal_instance->member = member; idle_source = g_idle_source_new (); g_source_set_priority (idle_source, G_PRIORITY_DEFAULT); g_source_set_callback (idle_source, emit_signal_instance_in_idle_cb, signal_instance, (GDestroyNotify) signal_instance_free); g_source_attach (idle_source, subscriber->context); g_source_unref (idle_source); } }}/* called in message handler thread with lock held */static voiddistribute_signals (GDBusConnection *connection, GDBusMessage *message){ GPtrArray *signal_data_array; const gchar *sender; sender = g_dbus_message_get_sender (message); if (G_UNLIKELY (_g_dbus_debug_signal ())) { _g_dbus_debug_print_lock (); g_print ("========================================================================\n" "GDBus-debug:Signal:\n" " <<<< RECEIVED SIGNAL %s.%s\n" " on object %s\n" " sent by name %s\n", g_dbus_message_get_interface (message), g_dbus_message_get_member (message), g_dbus_message_get_path (message), sender != NULL ? sender : "(none)"); _g_dbus_debug_print_unlock (); } /* collect subscribers that match on sender */ if (sender != NULL) { signal_data_array = g_hash_table_lookup (connection->map_sender_unique_name_to_signal_data_array, sender); if (signal_data_array != NULL) schedule_callbacks (connection, signal_data_array, message, sender); } /* collect subscribers not matching on sender */ signal_data_array = g_hash_table_lookup (connection->map_sender_unique_name_to_signal_data_array, ""); if (signal_data_array != NULL) schedule_callbacks (connection, signal_data_array, message, sender);}/* ---------------------------------------------------------------------------------------------------- *//* only called from finalize(), removes all subscriptions */static voidpurge_all_signal_subscriptions (GDBusConnection *connection){ GHashTableIter iter; gpointer key; GArray *ids; GArray *subscribers; guint n; ids = g_array_new (FALSE, FALSE, sizeof (guint)); g_hash_table_iter_init (&iter, connection->map_id_to_signal_data); while (g_hash_table_iter_next (&iter, &key, NULL)) { guint subscription_id = GPOINTER_TO_UINT (key); g_array_append_val (ids, subscription_id); } subscribers = g_array_new (FALSE, FALSE, sizeof (SignalSubscriber)); for (n = 0; n < ids->len; n++) { guint subscription_id = g_array_index (ids, guint, n); unsubscribe_id_internal (connection, subscription_id, subscribers); } g_array_free (ids, TRUE); /* call GDestroyNotify without lock held */ for (n = 0; n < subscribers->len; n++) { SignalSubscriber *subscriber; subscriber = &(g_array_index (subscribers, SignalSubscriber, n)); call_destroy_notify (subscriber->context, subscriber->user_data_free_func, subscriber->user_data); if (subscriber->context != NULL) g_main_context_unref (subscriber->context); } g_array_free (subscribers, TRUE);}/* ---------------------------------------------------------------------------------------------------- */static GDBusInterfaceVTable *_g_dbus_interface_vtable_copy (const GDBusInterfaceVTable *vtable){ /* Don't waste memory by copying padding - remember to update this * when changing struct _GDBusInterfaceVTable in gdbusconnection.h */ return g_memdup ((gconstpointer) vtable, 3 * sizeof (gpointer));}static void_g_dbus_interface_vtable_free (GDBusInterfaceVTable *vtable){ g_free (vtable);}/* ---------------------------------------------------------------------------------------------------- */static GDBusSubtreeVTable *_g_dbus_subtree_vtable_copy (const GDBusSubtreeVTable *vtable){ /* Don't waste memory by copying padding - remember to update this * when changing struct _GDBusSubtreeVTable in gdbusconnection.h */ return g_memdup ((gconstpointer) vtable, 3 * sizeof (gpointer));}static void_g_dbus_subtree_vtable_free (GDBusSubtreeVTable *vtable){ g_free (vtable);}/* ---------------------------------------------------------------------------------------------------- */struct ExportedObject{ gchar *object_path; GDBusConnection *connection; /* maps gchar* -> ExportedInterface* */ GHashTable *map_if_name_to_ei;};/* only called with lock held */static voidexported_object_free (ExportedObject *eo){ g_free (eo->object_path); g_hash_table_unref (eo->map_if_name_to_ei); g_free (eo);}typedef struct{ ExportedObject *eo; guint id; gchar *interface_name; GDBusInterfaceVTable *vtable; GDBusInterfaceInfo *interface_info; GMainContext *context; gpointer user_data; GDestroyNotify user_data_free_func;} ExportedInterface;/* called with lock held */static voidexported_interface_free (ExportedInterface *ei){ g_dbus_interface_info_unref ((GDBusInterfaceInfo *) ei->interface_info); call_destroy_notify (ei->context, ei->user_data_free_func, ei->user_data); if (ei->context != NULL) g_main_context_unref (ei->context); g_free (ei->interface_name); _g_dbus_interface_vtable_free (ei->vtable); g_free (ei);}/* ---------------------------------------------------------------------------------------------------- *//* Convenience function to check if @registration_id (if not zero) or * @subtree_registration_id (if not zero) has been unregistered. If * so, returns %TRUE. * * Caller must *not* hold lock. */static gbooleanhas_object_been_unregistered (GDBusConnection *connection, guint registration_id, guint subtree_registration_id){ gboolean ret; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); ret = FALSE; CONNECTION_LOCK (connection); if (registration_id != 0 && g_hash_table_lookup (connection->map_id_to_ei, GUINT_TO_POINTER (registration_id)) == NULL) { ret = TRUE; } else if (subtree_registration_id != 0 && g_hash_table_lookup (connection->map_id_to_es, GUINT_TO_POINTER (subtree_registration_id)) == NULL) { ret = TRUE; } CONNECTION_UNLOCK (connection); return ret;}/* ---------------------------------------------------------------------------------------------------- */typedef struct{ GDBusConnection *connection; GDBusMessage *message; gpointer user_data; const gchar *property_name; const GDBusInterfaceVTable *vtable; GDBusInterfaceInfo *interface_info; const GDBusPropertyInfo *property_info; guint registration_id; guint subtree_registration_id;} PropertyData;static voidproperty_data_free (PropertyData *data){ g_object_unref (data->connection); g_object_unref (data->message); g_free (data);}/* called in thread where object was registered - no locks held */static gbooleaninvoke_get_property_in_idle_cb (gpointer _data){ PropertyData *data = _data; GVariant *value; GError *error; GDBusMessage *reply; if (has_object_been_unregistered (data->connection, data->registration_id, data->subtree_registration_id)) { reply = g_dbus_message_new_method_error (data->message, "org.freedesktop.DBus.Error.UnknownMethod", _("No such interface `org.freedesktop.DBus.Properties' on object at path %s"), g_dbus_message_get_path (data->message)); g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); goto out; } error = NULL; value = data->vtable->get_property (data->connection, g_dbus_message_get_sender (data->message), g_dbus_message_get_path (data->message), data->interface_info->name, data->property_name, &error, data->user_data); if (value != NULL) { g_assert_no_error (error); if (g_variant_is_floating (value)) g_variant_ref_sink (value); reply = g_dbus_message_new_method_reply (data->message); g_dbus_message_set_body (reply, g_variant_new ("(v)", value)); g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_variant_unref (value); g_object_unref (reply); } else { gchar *dbus_error_name; g_assert (error != NULL); dbus_error_name = g_dbus_error_encode_gerror (error); reply = g_dbus_message_new_method_error_literal (data->message, dbus_error_name, error->message); g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_free (dbus_error_name); g_error_free (error); g_object_unref (reply); } out: return FALSE;}/* called in thread where object was registered - no locks held */static gbooleaninvoke_set_property_in_idle_cb (gpointer _data){ PropertyData *data = _data; GError *error; GDBusMessage *reply; GVariant *value; error = NULL; value = NULL; g_variant_get (g_dbus_message_get_body (data->message), "(ssv)", NULL, NULL, &value); /* Fail with org.freedesktop.DBus.Error.InvalidArgs if the type * of the given value is wrong */ if (g_strcmp0 (g_variant_get_type_string (value), data->property_info->signature) != 0) { reply = g_dbus_message_new_method_error (data->message, "org.freedesktop.DBus.Error.InvalidArgs", _("Error setting property `%s': Expected type `%s' but got `%s'"), data->property_info->name, data->property_info->signature, g_variant_get_type_string (value)); goto out; } if (!data->vtable->set_property (data->connection, g_dbus_message_get_sender (data->message), g_dbus_message_get_path (data->message), data->interface_info->name, data->property_name, value, &error, data->user_data)) { gchar *dbus_error_name; g_assert (error != NULL); dbus_error_name = g_dbus_error_encode_gerror (error); reply = g_dbus_message_new_method_error_literal (data->message, dbus_error_name, error->message); g_free (dbus_error_name); g_error_free (error); } else { reply = g_dbus_message_new_method_reply (data->message); } out: g_assert (reply != NULL); g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); g_variant_unref (value); return FALSE;}/* called with lock held */static gbooleanvalidate_and_maybe_schedule_property_getset (GDBusConnection *connection, GDBusMessage *message, guint registration_id, guint subtree_registration_id, gboolean is_get, GDBusInterfaceInfo *interface_info, const GDBusInterfaceVTable *vtable, GMainContext *main_context, gpointer user_data){ gboolean handled; const char *interface_name; const char *property_name; const GDBusPropertyInfo *property_info; GSource *idle_source; PropertyData *property_data; GDBusMessage *reply; handled = FALSE; if (is_get) g_variant_get (g_dbus_message_get_body (message), "(&s&s)", &interface_name, &property_name); else g_variant_get (g_dbus_message_get_body (message), "(&s&sv)", &interface_name, &property_name, NULL); if (is_get) { if (vtable == NULL || vtable->get_property == NULL) goto out; } else { if (vtable == NULL || vtable->set_property == NULL) goto out; } /* Check that the property exists - if not fail with org.freedesktop.DBus.Error.InvalidArgs */ property_info = NULL; /* TODO: the cost of this is O(n) - it might be worth caching the result */ property_info = g_dbus_interface_info_lookup_property (interface_info, property_name); if (property_info == NULL) { reply = g_dbus_message_new_method_error (message, "org.freedesktop.DBus.Error.InvalidArgs", _("No such property `%s'"), property_name); g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); handled = TRUE; goto out; } if (is_get && !(property_info->flags & G_DBUS_PROPERTY_INFO_FLAGS_READABLE)) { reply = g_dbus_message_new_method_error (message, "org.freedesktop.DBus.Error.InvalidArgs", _("Property `%s' is not readable"), property_name); g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); handled = TRUE; goto out; } else if (!is_get && !(property_info->flags & G_DBUS_PROPERTY_INFO_FLAGS_WRITABLE)) { reply = g_dbus_message_new_method_error (message, "org.freedesktop.DBus.Error.InvalidArgs", _("Property `%s' is not writable"), property_name); g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); handled = TRUE; goto out; } /* ok, got the property info - call user code in an idle handler */ property_data = g_new0 (PropertyData, 1); property_data->connection = g_object_ref (connection); property_data->message = g_object_ref (message); property_data->user_data = user_data; property_data->property_name = property_name; property_data->vtable = vtable; property_data->interface_info = interface_info; property_data->property_info = property_info; property_data->registration_id = registration_id; property_data->subtree_registration_id = subtree_registration_id; idle_source = g_idle_source_new (); g_source_set_priority (idle_source, G_PRIORITY_DEFAULT); g_source_set_callback (idle_source, is_get ? invoke_get_property_in_idle_cb : invoke_set_property_in_idle_cb, property_data, (GDestroyNotify) property_data_free); g_source_attach (idle_source, main_context); g_source_unref (idle_source); handled = TRUE; out: return handled;}/* called with lock held */static gbooleanhandle_getset_property (GDBusConnection *connection, ExportedObject *eo, GDBusMessage *message, gboolean is_get){ ExportedInterface *ei; gboolean handled; const char *interface_name; const char *property_name; handled = FALSE; if (is_get) g_variant_get (g_dbus_message_get_body (message), "(&s&s)", &interface_name, &property_name); else g_variant_get (g_dbus_message_get_body (message), "(&s&sv)", &interface_name, &property_name, NULL); /* Fail with org.freedesktop.DBus.Error.InvalidArgs if there is * no such interface registered */ ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_name); if (ei == NULL) { GDBusMessage *reply; reply = g_dbus_message_new_method_error (message, "org.freedesktop.DBus.Error.InvalidArgs", _("No such interface `%s'"), interface_name); g_dbus_connection_send_message_unlocked (eo->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); handled = TRUE; goto out; } handled = validate_and_maybe_schedule_property_getset (eo->connection, message, ei->id, 0, is_get, ei->interface_info, ei->vtable, ei->context, ei->user_data); out: return handled;}/* ---------------------------------------------------------------------------------------------------- */typedef struct{ GDBusConnection *connection; GDBusMessage *message; gpointer user_data; const GDBusInterfaceVTable *vtable; GDBusInterfaceInfo *interface_info; guint registration_id; guint subtree_registration_id;} PropertyGetAllData;static voidproperty_get_all_data_free (PropertyData *data){ g_object_unref (data->connection); g_object_unref (data->message); g_free (data);}/* called in thread where object was registered - no locks held */static gbooleaninvoke_get_all_properties_in_idle_cb (gpointer _data){ PropertyGetAllData *data = _data; GVariantBuilder builder; GError *error; GDBusMessage *reply; guint n; if (has_object_been_unregistered (data->connection, data->registration_id, data->subtree_registration_id)) { reply = g_dbus_message_new_method_error (data->message, "org.freedesktop.DBus.Error.UnknownMethod", _("No such interface `org.freedesktop.DBus.Properties' on object at path %s"), g_dbus_message_get_path (data->message)); g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); goto out; } error = NULL; /* TODO: Right now we never fail this call - we just omit values if * a get_property() call is failing. * * We could fail the whole call if just a single get_property() call * returns an error. We need clarification in the D-Bus spec about this. */ g_variant_builder_init (&builder, G_VARIANT_TYPE ("(a{sv})")); g_variant_builder_open (&builder, G_VARIANT_TYPE ("a{sv}")); for (n = 0; data->interface_info->properties != NULL && data->interface_info->properties[n] != NULL; n++) { const GDBusPropertyInfo *property_info = data->interface_info->properties[n]; GVariant *value; if (!(property_info->flags & G_DBUS_PROPERTY_INFO_FLAGS_READABLE)) continue; value = data->vtable->get_property (data->connection, g_dbus_message_get_sender (data->message), g_dbus_message_get_path (data->message), data->interface_info->name, property_info->name, NULL, data->user_data); if (value == NULL) continue; if (g_variant_is_floating (value)) g_variant_ref_sink (value); g_variant_builder_add (&builder, "{sv}", property_info->name, value); g_variant_unref (value); } g_variant_builder_close (&builder); reply = g_dbus_message_new_method_reply (data->message); g_dbus_message_set_body (reply, g_variant_builder_end (&builder)); g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); out: return FALSE;}/* called with lock held */static gbooleanvalidate_and_maybe_schedule_property_get_all (GDBusConnection *connection, GDBusMessage *message, guint registration_id, guint subtree_registration_id, GDBusInterfaceInfo *interface_info, const GDBusInterfaceVTable *vtable, GMainContext *main_context, gpointer user_data){ gboolean handled; const char *interface_name; GSource *idle_source; PropertyGetAllData *property_get_all_data; handled = FALSE; g_variant_get (g_dbus_message_get_body (message), "(&s)", &interface_name); if (vtable == NULL || vtable->get_property == NULL) goto out; /* ok, got the property info - call user in an idle handler */ property_get_all_data = g_new0 (PropertyGetAllData, 1); property_get_all_data->connection = g_object_ref (connection); property_get_all_data->message = g_object_ref (message); property_get_all_data->user_data = user_data; property_get_all_data->vtable = vtable; property_get_all_data->interface_info = interface_info; property_get_all_data->registration_id = registration_id; property_get_all_data->subtree_registration_id = subtree_registration_id; idle_source = g_idle_source_new (); g_source_set_priority (idle_source, G_PRIORITY_DEFAULT); g_source_set_callback (idle_source, invoke_get_all_properties_in_idle_cb, property_get_all_data, (GDestroyNotify) property_get_all_data_free); g_source_attach (idle_source, main_context); g_source_unref (idle_source); handled = TRUE; out: return handled;}/* called with lock held */static gbooleanhandle_get_all_properties (GDBusConnection *connection, ExportedObject *eo, GDBusMessage *message){ ExportedInterface *ei; gboolean handled; const char *interface_name; handled = FALSE; g_variant_get (g_dbus_message_get_body (message), "(&s)", &interface_name); /* Fail with org.freedesktop.DBus.Error.InvalidArgs if there is * no such interface registered */ ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_name); if (ei == NULL) { GDBusMessage *reply; reply = g_dbus_message_new_method_error (message, "org.freedesktop.DBus.Error.InvalidArgs", _("No such interface"), interface_name); g_dbus_connection_send_message_unlocked (eo->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); handled = TRUE; goto out; } handled = validate_and_maybe_schedule_property_get_all (eo->connection, message, ei->id, 0, ei->interface_info, ei->vtable, ei->context, ei->user_data); out: return handled;}/* ---------------------------------------------------------------------------------------------------- */static const gchar introspect_header[] = "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\"\n" " \"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n" "<!-- GDBus " PACKAGE_VERSION " -->\n" "<node>\n";static const gchar introspect_tail[] = "</node>\n";static const gchar introspect_properties_interface[] = " <interface name=\"org.freedesktop.DBus.Properties\">\n" " <method name=\"Get\">\n" " <arg type=\"s\" name=\"interface_name\" direction=\"in\"/>\n" " <arg type=\"s\" name=\"property_name\" direction=\"in\"/>\n" " <arg type=\"v\" name=\"value\" direction=\"out\"/>\n" " </method>\n" " <method name=\"GetAll\">\n" " <arg type=\"s\" name=\"interface_name\" direction=\"in\"/>\n" " <arg type=\"a{sv}\" name=\"properties\" direction=\"out\"/>\n" " </method>\n" " <method name=\"Set\">\n" " <arg type=\"s\" name=\"interface_name\" direction=\"in\"/>\n" " <arg type=\"s\" name=\"property_name\" direction=\"in\"/>\n" " <arg type=\"v\" name=\"value\" direction=\"in\"/>\n" " </method>\n" " <signal name=\"PropertiesChanged\">\n" " <arg type=\"s\" name=\"interface_name\"/>\n" " <arg type=\"a{sv}\" name=\"changed_properties\"/>\n" " <arg type=\"as\" name=\"invalidated_properties\"/>\n" " </signal>\n" " </interface>\n";static const gchar introspect_introspectable_interface[] = " <interface name=\"org.freedesktop.DBus.Introspectable\">\n" " <method name=\"Introspect\">\n" " <arg type=\"s\" name=\"xml_data\" direction=\"out\"/>\n" " </method>\n" " </interface>\n" " <interface name=\"org.freedesktop.DBus.Peer\">\n" " <method name=\"Ping\"/>\n" " <method name=\"GetMachineId\">\n" " <arg type=\"s\" name=\"machine_uuid\" direction=\"out\"/>\n" " </method>\n" " </interface>\n";static voidintrospect_append_header (GString *s){ g_string_append (s, introspect_header);}static voidmaybe_add_path (const gchar *path, gsize path_len, const gchar *object_path, GHashTable *set){ if (g_str_has_prefix (object_path, path) && strlen (object_path) > path_len && object_path[path_len-1] == '/') { const gchar *begin; const gchar *end; gchar *s; begin = object_path + path_len; end = strchr (begin, '/'); if (end != NULL) s = g_strndup (begin, end - begin); else s = g_strdup (begin); if (g_hash_table_lookup (set, s) == NULL) g_hash_table_insert (set, s, GUINT_TO_POINTER (1)); else g_free (s); }}/* TODO: we want a nicer public interface for this */static gchar **g_dbus_connection_list_registered_unlocked (GDBusConnection *connection, const gchar *path){ GPtrArray *p; gchar **ret; GHashTableIter hash_iter; const gchar *object_path; gsize path_len; GHashTable *set; GList *keys; GList *l; CONNECTION_ENSURE_LOCK (connection); path_len = strlen (path); if (path_len > 1) path_len++; set = g_hash_table_new (g_str_hash, g_str_equal); g_hash_table_iter_init (&hash_iter, connection->map_object_path_to_eo); while (g_hash_table_iter_next (&hash_iter, (gpointer) &object_path, NULL)) maybe_add_path (path, path_len, object_path, set); g_hash_table_iter_init (&hash_iter, connection->map_object_path_to_es); while (g_hash_table_iter_next (&hash_iter, (gpointer) &object_path, NULL)) maybe_add_path (path, path_len, object_path, set); p = g_ptr_array_new (); keys = g_hash_table_get_keys (set); for (l = keys; l != NULL; l = l->next) g_ptr_array_add (p, l->data); g_hash_table_unref (set); g_list_free (keys); g_ptr_array_add (p, NULL); ret = (gchar **) g_ptr_array_free (p, FALSE); return ret;}static gchar **g_dbus_connection_list_registered (GDBusConnection *connection, const gchar *path){ gchar **ret; CONNECTION_LOCK (connection); ret = g_dbus_connection_list_registered_unlocked (connection, path); CONNECTION_UNLOCK (connection); return ret;}/* called in message handler thread with lock held */static gbooleanhandle_introspect (GDBusConnection *connection, ExportedObject *eo, GDBusMessage *message){ guint n; GString *s; GDBusMessage *reply; GHashTableIter hash_iter; ExportedInterface *ei; gchar **registered; /* first the header with the standard interfaces */ s = g_string_sized_new (sizeof (introspect_header) + sizeof (introspect_properties_interface) + sizeof (introspect_introspectable_interface) + sizeof (introspect_tail)); introspect_append_header (s); if (!g_hash_table_lookup (eo->map_if_name_to_ei, "org.freedesktop.DBus.Properties")) g_string_append (s, introspect_properties_interface); if (!g_hash_table_lookup (eo->map_if_name_to_ei, "org.freedesktop.DBus.Introspectable")) g_string_append (s, introspect_introspectable_interface); /* then include the registered interfaces */ g_hash_table_iter_init (&hash_iter, eo->map_if_name_to_ei); while (g_hash_table_iter_next (&hash_iter, NULL, (gpointer) &ei)) g_dbus_interface_info_generate_xml (ei->interface_info, 2, s); /* finally include nodes registered below us */ registered = g_dbus_connection_list_registered_unlocked (connection, eo->object_path); for (n = 0; registered != NULL && registered[n] != NULL; n++) g_string_append_printf (s, " <node name=\"%s\"/>\n", registered[n]); g_strfreev (registered); g_string_append (s, introspect_tail); reply = g_dbus_message_new_method_reply (message); g_dbus_message_set_body (reply, g_variant_new ("(s)", s->str)); g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); g_string_free (s, TRUE); return TRUE;}/* called in thread where object was registered - no locks held */static gbooleancall_in_idle_cb (gpointer user_data){ GDBusMethodInvocation *invocation = G_DBUS_METHOD_INVOCATION (user_data); GDBusInterfaceVTable *vtable; guint registration_id; guint subtree_registration_id; vtable = g_object_get_data (G_OBJECT (invocation), "g-dbus-interface-vtable"); g_assert (vtable != NULL && vtable->method_call != NULL); registration_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (invocation), "g-dbus-registration-id")); subtree_registration_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (invocation), "g-dbus-subtree-registration-id")); if (has_object_been_unregistered (g_dbus_method_invocation_get_connection (invocation), registration_id, subtree_registration_id)) { GDBusMessage *reply; reply = g_dbus_message_new_method_error (g_dbus_method_invocation_get_message (invocation), "org.freedesktop.DBus.Error.UnknownMethod", _("No such interface `%s' on object at path %s"), g_dbus_method_invocation_get_interface_name (invocation), g_dbus_method_invocation_get_object_path (invocation)); g_dbus_connection_send_message (g_dbus_method_invocation_get_connection (invocation), reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); goto out; } vtable->method_call (g_dbus_method_invocation_get_connection (invocation), g_dbus_method_invocation_get_sender (invocation), g_dbus_method_invocation_get_object_path (invocation), g_dbus_method_invocation_get_interface_name (invocation), g_dbus_method_invocation_get_method_name (invocation), g_dbus_method_invocation_get_parameters (invocation), g_object_ref (invocation), g_dbus_method_invocation_get_user_data (invocation)); out: return FALSE;}/* called in message handler thread with lock held */static gbooleanvalidate_and_maybe_schedule_method_call (GDBusConnection *connection, GDBusMessage *message, guint registration_id, guint subtree_registration_id, GDBusInterfaceInfo *interface_info, const GDBusInterfaceVTable *vtable, GMainContext *main_context, gpointer user_data){ GDBusMethodInvocation *invocation; const GDBusMethodInfo *method_info; GDBusMessage *reply; GVariant *parameters; GSource *idle_source; gboolean handled; GVariantType *in_type; handled = FALSE; /* TODO: the cost of this is O(n) - it might be worth caching the result */ method_info = g_dbus_interface_info_lookup_method (interface_info, g_dbus_message_get_member (message)); /* if the method doesn't exist, return the org.freedesktop.DBus.Error.UnknownMethod * error to the caller */ if (method_info == NULL) { reply = g_dbus_message_new_method_error (message, "org.freedesktop.DBus.Error.UnknownMethod", _("No such method `%s'"), g_dbus_message_get_member (message)); g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); handled = TRUE; goto out; } parameters = g_dbus_message_get_body (message); if (parameters == NULL) { parameters = g_variant_new ("()"); g_variant_ref_sink (parameters); } else { g_variant_ref (parameters); } /* Check that the incoming args are of the right type - if they are not, return * the org.freedesktop.DBus.Error.InvalidArgs error to the caller */ in_type = _g_dbus_compute_complete_signature (method_info->in_args); if (!g_variant_is_of_type (parameters, in_type)) { gchar *type_string; type_string = g_variant_type_dup_string (in_type); reply = g_dbus_message_new_method_error (message, "org.freedesktop.DBus.Error.InvalidArgs", _("Type of message, `%s', does not match expected type `%s'"), g_variant_get_type_string (parameters), type_string); g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_variant_type_free (in_type); g_variant_unref (parameters); g_object_unref (reply); g_free (type_string); handled = TRUE; goto out; } g_variant_type_free (in_type); /* schedule the call in idle */ invocation = _g_dbus_method_invocation_new (g_dbus_message_get_sender (message), g_dbus_message_get_path (message), g_dbus_message_get_interface (message), g_dbus_message_get_member (message), method_info, connection, message, parameters, user_data); g_variant_unref (parameters); /* TODO: would be nicer with a real MethodData like we already * have PropertyData and PropertyGetAllData... */ g_object_set_data (G_OBJECT (invocation), "g-dbus-interface-vtable", (gpointer) vtable); g_object_set_data (G_OBJECT (invocation), "g-dbus-registration-id", GUINT_TO_POINTER (registration_id)); g_object_set_data (G_OBJECT (invocation), "g-dbus-subtree-registration-id", GUINT_TO_POINTER (subtree_registration_id)); idle_source = g_idle_source_new (); g_source_set_priority (idle_source, G_PRIORITY_DEFAULT); g_source_set_callback (idle_source, call_in_idle_cb, invocation, g_object_unref); g_source_attach (idle_source, main_context); g_source_unref (idle_source); handled = TRUE; out: return handled;}/* ---------------------------------------------------------------------------------------------------- *//* called in message handler thread with lock held */static gbooleanobj_message_func (GDBusConnection *connection, ExportedObject *eo, GDBusMessage *message){ const gchar *interface_name; const gchar *member; const gchar *signature; gboolean handled; handled = FALSE; interface_name = g_dbus_message_get_interface (message); member = g_dbus_message_get_member (message); signature = g_dbus_message_get_signature (message); /* see if we have an interface for handling this call */ if (interface_name != NULL) { ExportedInterface *ei; ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_name); if (ei != NULL) { /* we do - invoke the handler in idle in the right thread */ /* handle no vtable or handler being present */ if (ei->vtable == NULL || ei->vtable->method_call == NULL) goto out;Z handled = validate_and_maybe_schedule_method_call (connection, message, ei->id, 0, ei->interface_info, ei->vtable, ei->context, ei->user_data); goto out; } } if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Introspectable") == 0 && g_strcmp0 (member, "Introspect") == 0 && g_strcmp0 (signature, "") == 0) { handled = handle_introspect (connection, eo, message); goto out; } else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0 && g_strcmp0 (member, "Get") == 0 && g_strcmp0 (signature, "ss") == 0) { handled = handle_getset_property (connection, eo, message, TRUE); goto out; } else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0 && g_strcmp0 (member, "Set") == 0 && g_strcmp0 (signature, "ssv") == 0) { handled = handle_getset_property (connection, eo, message, FALSE); goto out; } else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0 && g_strcmp0 (member, "GetAll") == 0 && g_strcmp0 (signature, "s") == 0) { handled = handle_get_all_properties (connection, eo, message); goto out; } out: return handled;}/** * g_dbus_connection_register_object: * @connection: A #GDBusConnection. * @object_path: The object path to register at. * @interface_info: Introspection data for the interface. * @vtable: A #GDBusInterfaceVTable to call into or %NULL. * @user_data: Data to pass to functions in @vtable. * @user_data_free_func: Function to call when the object path is unregistered. * @error: Return location for error or %NULL. * * Registers callbacks for exported objects at @object_path with the * D-Bus interface that is described in @interface_info. * * Calls to functions in @vtable (and @user_data_free_func) will * happen in the <link linkend="g-main-context-push-thread-default">thread-default main * loop</link> of the thread you are calling this method from. * * Note that all #GVariant values passed to functions in @vtable will match * the signature given in @interface_info - if a remote caller passes * incorrect values, the <literal>org.freedesktop.DBus.Error.InvalidArgs</literal> * is returned to the remote caller. * * Additionally, if the remote caller attempts to invoke methods or * access properties not mentioned in @interface_info the * <literal>org.freedesktop.DBus.Error.UnknownMethod</literal> resp. * <literal>org.freedesktop.DBus.Error.InvalidArgs</literal> errors * are returned to the caller. * * It is considered a programming error if the * #GDBusInterfaceGetPropertyFunc function in @vtable returns a * #GVariant of incorrect type. * * If an existing callback is already registered at @object_path and * @interface_name, then @error is set to #G_IO_ERROR_EXISTS. * * GDBus automatically implements the standard D-Bus interfaces * org.freedesktop.DBus.Properties, org.freedesktop.DBus.Introspectable * and org.freedesktop.Peer, so you don't have to implement those for * the objects you export. You <emphasis>can</emphasis> implement * org.freedesktop.DBus.Properties yourself, e.g. to handle getting * and setting of properties asynchronously. * * Note that the reference count on @interface_info will be * incremented by 1 (unless allocated statically, e.g. if the * reference count is -1, see g_dbus_interface_info_ref()) for as long * as the object is exported. Also note that @vtable will be copied. * * See <xref linkend="gdbus-server"/> for an example of how to use this method. * * Returns: 0 if @error is set, otherwise a registration id (never 0) * that can be used with g_dbus_connection_unregister_object() . * * Since: 2.26 */guintg_dbus_connection_register_object (GDBusConnection *connection, const gchar *object_path, GDBusInterfaceInfo *interface_info, const GDBusInterfaceVTable *vtable, gpointer user_data, GDestroyNotify user_data_free_func, GError **error){ ExportedObject *eo; ExportedInterface *ei; guint ret; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0); g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), 0); g_return_val_if_fail (interface_info != NULL, 0); g_return_val_if_fail (g_dbus_is_interface_name (interface_info->name), 0); g_return_val_if_fail (error == NULL || *error == NULL, 0); ret = 0; CONNECTION_LOCK (connection); eo = g_hash_table_lookup (connection->map_object_path_to_eo, object_path); if (eo == NULL) { eo = g_new0 (ExportedObject, 1); eo->object_path = g_strdup (object_path); eo->connection = connection; eo->map_if_name_to_ei = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, (GDestroyNotify) exported_interface_free); g_hash_table_insert (connection->map_object_path_to_eo, eo->object_path, eo); } ei = g_hash_table_lookup (eo->map_if_name_to_ei, interface_info->name); if (ei != NULL) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_EXISTS, _("An object is already exported for the interface %s at %s"), interface_info->name, object_path); goto out; } ei = g_new0 (ExportedInterface, 1); ei->id = _global_registration_id++; /* TODO: overflow etc. */ ei->eo = eo; ei->user_data = user_data; ei->user_data_free_func = user_data_free_func; ei->vtable = _g_dbus_interface_vtable_copy (vtable); ei->interface_info = g_dbus_interface_info_ref (interface_info); ei->interface_name = g_strdup (interface_info->name); ei->context = g_main_context_get_thread_default (); if (ei->context != NULL) g_main_context_ref (ei->context); g_hash_table_insert (eo->map_if_name_to_ei, (gpointer) ei->interface_name, ei); g_hash_table_insert (connection->map_id_to_ei, GUINT_TO_POINTER (ei->id), ei); ret = ei->id; out: CONNECTION_UNLOCK (connection); return ret;}/** * g_dbus_connection_unregister_object: * @connection: A #GDBusConnection. * @registration_id: A registration id obtained from g_dbus_connection_register_object(). * * Unregisters an object. * * Returns: %TRUE if the object was unregistered, %FALSE otherwise. * * Since: 2.26 */gbooleang_dbus_connection_unregister_object (GDBusConnection *connection, guint registration_id){ ExportedInterface *ei; ExportedObject *eo; gboolean ret; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); ret = FALSE; CONNECTION_LOCK (connection); ei = g_hash_table_lookup (connection->map_id_to_ei, GUINT_TO_POINTER (registration_id)); if (ei == NULL) goto out; eo = ei->eo; g_warn_if_fail (g_hash_table_remove (connection->map_id_to_ei, GUINT_TO_POINTER (ei->id))); g_warn_if_fail (g_hash_table_remove (eo->map_if_name_to_ei, ei->interface_name)); /* unregister object path if we have no more exported interfaces */ if (g_hash_table_size (eo->map_if_name_to_ei) == 0) g_warn_if_fail (g_hash_table_remove (connection->map_object_path_to_eo, eo->object_path)); ret = TRUE; out: CONNECTION_UNLOCK (connection); return ret;}/* ---------------------------------------------------------------------------------------------------- *//** * g_dbus_connection_emit_signal: * @connection: A #GDBusConnection. * @destination_bus_name: The unique bus name for the destination for the signal or %NULL to emit to all listeners. * @object_path: Path of remote object. * @interface_name: D-Bus interface to emit a signal on. * @signal_name: The name of the signal to emit. * @parameters: A #GVariant tuple with parameters for the signal or %NULL if not passing parameters. * @error: Return location for error or %NULL. * * Emits a signal. * * If the parameters GVariant is floating, it is consumed. * * This can only fail if @parameters is not compatible with the D-Bus protocol. * * Returns: %TRUE unless @error is set. * * Since: 2.26 */gbooleang_dbus_connection_emit_signal (GDBusConnection *connection, const gchar *destination_bus_name, const gchar *object_path, const gchar *interface_name, const gchar *signal_name, GVariant *parameters, GError **error){ GDBusMessage *message; gboolean ret; message = NULL; ret = FALSE; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); g_return_val_if_fail (destination_bus_name == NULL || g_dbus_is_name (destination_bus_name), FALSE); g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), FALSE); g_return_val_if_fail (interface_name != NULL && g_dbus_is_interface_name (interface_name), FALSE); g_return_val_if_fail (signal_name != NULL && g_dbus_is_member_name (signal_name), FALSE); g_return_val_if_fail (parameters == NULL || g_variant_is_of_type (parameters, G_VARIANT_TYPE_TUPLE), FALSE); if (G_UNLIKELY (_g_dbus_debug_emission ())) { _g_dbus_debug_print_lock (); g_print ("========================================================================\n" "GDBus-debug:Emission:\n" " >>>> SIGNAL EMISSION %s.%s()\n" " on object %s\n" " destination %s\n", interface_name, signal_name, object_path, destination_bus_name != NULL ? destination_bus_name : "(none)"); _g_dbus_debug_print_unlock (); } message = g_dbus_message_new_signal (object_path, interface_name, signal_name); if (destination_bus_name != NULL) g_dbus_message_set_header (message, G_DBUS_MESSAGE_HEADER_FIELD_DESTINATION, g_variant_new_string (destination_bus_name)); if (parameters != NULL) g_dbus_message_set_body (message, parameters); ret = g_dbus_connection_send_message (connection, message, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, error); g_object_unref (message); return ret;}static voidadd_call_flags (GDBusMessage *message, GDBusCallFlags flags){ if (flags & G_DBUS_CALL_FLAGS_NO_AUTO_START) g_dbus_message_set_flags (message, G_DBUS_MESSAGE_FLAGS_NO_AUTO_START);}static GVariant *decode_method_reply (GDBusMessage *reply, const gchar *method_name, const GVariantType *reply_type, GError **error){ GVariant *result; result = NULL; switch (g_dbus_message_get_message_type (reply)) { case G_DBUS_MESSAGE_TYPE_METHOD_RETURN: result = g_dbus_message_get_body (reply); if (result == NULL) { result = g_variant_new ("()"); g_variant_ref_sink (result); } else { g_variant_ref (result); } if (!g_variant_is_of_type (result, reply_type)) { gchar *type_string = g_variant_type_dup_string (reply_type); g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Method `%s' returned type `%s', but expected `%s'"), method_name, g_variant_get_type_string (result), type_string); g_variant_unref (result); g_free (type_string); result = NULL; } break; case G_DBUS_MESSAGE_TYPE_ERROR: g_dbus_message_to_gerror (reply, error); break; default: g_assert_not_reached (); break; } return result;}typedef struct{ GSimpleAsyncResult *simple; GVariantType *reply_type; gchar *method_name; /* for error message */ guint32 serial;} CallState;static voidg_dbus_connection_call_done (GObject *source, GAsyncResult *result, gpointer user_data){ GDBusConnection *connection = G_DBUS_CONNECTION (source); CallState *state = user_data; GError *error; GDBusMessage *reply; GVariant *value; error = NULL; reply = g_dbus_connection_send_message_with_reply_finish (connection, result, &error); if (G_UNLIKELY (_g_dbus_debug_call ())) { _g_dbus_debug_print_lock (); g_print ("========================================================================\n" "GDBus-debug:Call:\n" " <<<< ASYNC COMPLETE %s() (serial %d)\n" " ", state->method_name, state->serial); if (reply != NULL) { g_print ("SUCCESS\n"); } else { g_print ("FAILED: %s\n", error->message); } _g_dbus_debug_print_unlock (); } if (reply != NULL) { value = decode_method_reply (reply, state->method_name, state->reply_type, &error); g_object_unref (reply); } else value = NULL; if (value == NULL) g_simple_async_result_take_error (state->simple, error); else g_simple_async_result_set_op_res_gpointer (state->simple, value, (GDestroyNotify) g_variant_unref); g_simple_async_result_complete (state->simple); g_variant_type_free (state->reply_type); g_object_unref (state->simple); g_free (state->method_name); g_slice_free (CallState, state);}/** * g_dbus_connection_call: * @connection: A #GDBusConnection. * @bus_name: A unique or well-known bus name or %NULL if @connection is not a message bus connection. * @object_path: Path of remote object. * @interface_name: D-Bus interface to invoke method on. * @method_name: The name of the method to invoke. * @parameters: A #GVariant tuple with parameters for the method or %NULL if not passing parameters. * @reply_type: The expected type of the reply, or %NULL. * @flags: Flags from the #GDBusCallFlags enumeration. * @timeout_msec: The timeout in milliseconds, -1 to use the default * timeout or %G_MAXINT for no timeout. * @cancellable: A #GCancellable or %NULL. * @callback: A #GAsyncReadyCallback to call when the request is satisfied or %NULL if you don't * care about the result of the method invocation. * @user_data: The data to pass to @callback. * * Asynchronously invokes the @method_name method on the * @interface_name D-Bus interface on the remote object at * @object_path owned by @bus_name. * * If @connection is closed then the operation will fail with * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the operation will * fail with %G_IO_ERROR_CANCELLED. If @parameters contains a value * not compatible with the D-Bus protocol, the operation fails with * %G_IO_ERROR_INVALID_ARGUMENT. * * If @reply_type is non-%NULL then the reply will be checked for having this type and an * error will be raised if it does not match. Said another way, if you give a @reply_type * then any non-%NULL return value will be of this type. * * If the @parameters #GVariant is floating, it is consumed. This allows * convenient 'inline' use of g_variant_new(), e.g.: * |[ * g_dbus_connection_call (connection, * "org.freedesktop.StringThings", * "/org/freedesktop/StringThings", * "org.freedesktop.StringThings", * "TwoStrings", * g_variant_new ("(ss)", * "Thing One", * "Thing Two"), * NULL, * G_DBUS_CALL_FLAGS_NONE, * -1, * NULL, * (GAsyncReadyCallback) two_strings_done, * NULL); * ]| * * This is an asynchronous method. When the operation is finished, @callback will be invoked * in the <link linkend="g-main-context-push-thread-default">thread-default main loop</link> * of the thread you are calling this method from. You can then call * g_dbus_connection_call_finish() to get the result of the operation. * See g_dbus_connection_call_sync() for the synchronous version of this * function. * * Since: 2.26 */voidg_dbus_connection_call (GDBusConnection *connection, const gchar *bus_name, const gchar *object_path, const gchar *interface_name, const gchar *method_name, GVariant *parameters, const GVariantType *reply_type, GDBusCallFlags flags, gint timeout_msec, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data){ GDBusMessage *message; CallState *state; g_return_if_fail (G_IS_DBUS_CONNECTION (connection)); g_return_if_fail (bus_name == NULL || g_dbus_is_name (bus_name)); g_return_if_fail (object_path != NULL && g_variant_is_object_path (object_path)); g_return_if_fail (interface_name != NULL && g_dbus_is_interface_name (interface_name)); g_return_if_fail (method_name != NULL && g_dbus_is_member_name (method_name)); g_return_if_fail (timeout_msec >= 0 || timeout_msec == -1); g_return_if_fail ((parameters == NULL) || g_variant_is_of_type (parameters, G_VARIANT_TYPE_TUPLE)); state = g_slice_new (CallState); state->simple = g_simple_async_result_new (G_OBJECT (connection), callback, user_data, g_dbus_connection_call); state->method_name = g_strjoin (".", interface_name, method_name, NULL); if (reply_type == NULL) reply_type = G_VARIANT_TYPE_ANY; state->reply_type = g_variant_type_copy (reply_type); message = g_dbus_message_new_method_call (bus_name, object_path, interface_name, method_name); add_call_flags (message, flags); if (parameters != NULL) g_dbus_message_set_body (message, parameters); g_dbus_connection_send_message_with_reply (connection, message, G_DBUS_SEND_MESSAGE_FLAGS_NONE, timeout_msec, &state->serial, cancellable, g_dbus_connection_call_done, state); if (G_UNLIKELY (_g_dbus_debug_call ())) { _g_dbus_debug_print_lock (); g_print ("========================================================================\n" "GDBus-debug:Call:\n" " >>>> ASYNC %s.%s()\n" " on object %s\n" " owned by name %s (serial %d)\n", interface_name, method_name, object_path, bus_name != NULL ? bus_name : "(none)", state->serial); _g_dbus_debug_print_unlock (); } if (message != NULL) g_object_unref (message);}/** * g_dbus_connection_call_finish: * @connection: A #GDBusConnection. * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_connection_call(). * @error: Return location for error or %NULL. * * Finishes an operation started with g_dbus_connection_call(). * * Returns: %NULL if @error is set. Otherwise a #GVariant tuple with * return values. Free with g_variant_unref(). * * Since: 2.26 */GVariant *g_dbus_connection_call_finish (GDBusConnection *connection, GAsyncResult *res, GError **error){ GSimpleAsyncResult *simple; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL); g_return_val_if_fail (g_simple_async_result_is_valid (res, G_OBJECT (connection), g_dbus_connection_call), NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); simple = G_SIMPLE_ASYNC_RESULT (res); if (g_simple_async_result_propagate_error (simple, error)) return NULL; return g_variant_ref (g_simple_async_result_get_op_res_gpointer (simple));}/* ---------------------------------------------------------------------------------------------------- *//** * g_dbus_connection_call_sync: * @connection: A #GDBusConnection. * @bus_name: A unique or well-known bus name. * @object_path: Path of remote object. * @interface_name: D-Bus interface to invoke method on. * @method_name: The name of the method to invoke. * @parameters: A #GVariant tuple with parameters for the method or %NULL if not passing parameters. * @reply_type: The expected type of the reply, or %NULL. * @flags: Flags from the #GDBusCallFlags enumeration. * @timeout_msec: The timeout in milliseconds, -1 to use the default * timeout or %G_MAXINT for no timeout. * @cancellable: A #GCancellable or %NULL. * @error: Return location for error or %NULL. * * Synchronously invokes the @method_name method on the * @interface_name D-Bus interface on the remote object at * @object_path owned by @bus_name. * * If @connection is closed then the operation will fail with * %G_IO_ERROR_CLOSED. If @cancellable is canceled, the * operation will fail with %G_IO_ERROR_CANCELLED. If @parameters * contains a value not compatible with the D-Bus protocol, the operation * fails with %G_IO_ERROR_INVALID_ARGUMENT. * If @reply_type is non-%NULL then the reply will be checked for having * this type and an error will be raised if it does not match. Said * another way, if you give a @reply_type then any non-%NULL return * value will be of this type. * * If the @parameters #GVariant is floating, it is consumed. * This allows convenient 'inline' use of g_variant_new(), e.g.: * |[ * g_dbus_connection_call_sync (connection, * "org.freedesktop.StringThings", * "/org/freedesktop/StringThings", * "org.freedesktop.StringThings", * "TwoStrings", * g_variant_new ("(ss)", * "Thing One", * "Thing Two"), * NULL, * G_DBUS_CALL_FLAGS_NONE, * -1, * NULL, * &error); * ]| * * The calling thread is blocked until a reply is received. See * g_dbus_connection_call() for the asynchronous version of * this method. * * Returns: %NULL if @error is set. Otherwise a #GVariant tuple with * return values. Free with g_variant_unref(). * * Since: 2.26 */GVariant *g_dbus_connection_call_sync (GDBusConnection *connection, const gchar *bus_name, const gchar *object_path, const gchar *interface_name, const gchar *method_name, GVariant *parameters, const GVariantType *reply_type, GDBusCallFlags flags, gint timeout_msec, GCancellable *cancellable, GError **error){ GDBusMessage *message; GDBusMessage *reply; GVariant *result; GError *local_error; message = NULL; reply = NULL; result = NULL; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL); g_return_val_if_fail (bus_name == NULL || g_dbus_is_name (bus_name), NULL); g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), NULL); g_return_val_if_fail (interface_name != NULL && g_dbus_is_interface_name (interface_name), NULL); g_return_val_if_fail (method_name != NULL && g_dbus_is_member_name (method_name), NULL); g_return_val_if_fail (timeout_msec >= 0 || timeout_msec == -1, NULL); g_return_val_if_fail ((parameters == NULL) || g_variant_is_of_type (parameters, G_VARIANT_TYPE_TUPLE), NULL); if (reply_type == NULL) reply_type = G_VARIANT_TYPE_ANY; message = g_dbus_message_new_method_call (bus_name, object_path, interface_name, method_name); add_call_flags (message, flags); if (parameters != NULL) g_dbus_message_set_body (message, parameters); if (G_UNLIKELY (_g_dbus_debug_call ())) { _g_dbus_debug_print_lock (); g_print ("========================================================================\n" "GDBus-debug:Call:\n" " >>>> SYNC %s.%s()\n" " on object %s\n" " owned by name %s\n", interface_name, method_name, object_path, bus_name != NULL ? bus_name : "(none)"); _g_dbus_debug_print_unlock (); } local_error = NULL; reply = g_dbus_connection_send_message_with_reply_sync (connection, message, G_DBUS_SEND_MESSAGE_FLAGS_NONE, timeout_msec, NULL, /* volatile guint32 *out_serial */ cancellable, &local_error); if (G_UNLIKELY (_g_dbus_debug_call ())) { _g_dbus_debug_print_lock (); g_print ("========================================================================\n" "GDBus-debug:Call:\n" " <<<< SYNC COMPLETE %s.%s()\n" " ", interface_name, method_name); if (reply != NULL) { g_print ("SUCCESS\n"); } else { g_print ("FAILED: %s\n", local_error->message); } _g_dbus_debug_print_unlock (); } if (reply == NULL) { if (error != NULL) *error = local_error; else g_error_free (local_error); goto out; } result = decode_method_reply (reply, method_name, reply_type, error); out: if (message != NULL) g_object_unref (message); if (reply != NULL) g_object_unref (reply); return result;}/* ---------------------------------------------------------------------------------------------------- */struct ExportedSubtree{ guint id; gchar *object_path; GDBusConnection *connection; GDBusSubtreeVTable *vtable; GDBusSubtreeFlags flags; GMainContext *context; gpointer user_data; GDestroyNotify user_data_free_func;};static voidexported_subtree_free (ExportedSubtree *es){ call_destroy_notify (es->context, es->user_data_free_func, es->user_data); if (es->context != NULL) g_main_context_unref (es->context); _g_dbus_subtree_vtable_free (es->vtable); g_free (es->object_path); g_free (es);}/* called without lock held */static gbooleanhandle_subtree_introspect (GDBusConnection *connection, ExportedSubtree *es, GDBusMessage *message){ GString *s; gboolean handled; GDBusMessage *reply; gchar **children; gboolean is_root; const gchar *sender; const gchar *requested_object_path; const gchar *requested_node; GDBusInterfaceInfo **interfaces; guint n; gchar **subnode_paths; gboolean has_properties_interface; gboolean has_introspectable_interface; handled = FALSE; requested_object_path = g_dbus_message_get_path (message); sender = g_dbus_message_get_sender (message); is_root = (g_strcmp0 (requested_object_path, es->object_path) == 0); s = g_string_new (NULL); introspect_append_header (s); /* Strictly we don't need the children in dynamic mode, but we avoid the * conditionals to preserve code clarity */ children = es->vtable->enumerate (es->connection, sender, es->object_path, es->user_data); if (!is_root) { requested_node = strrchr (requested_object_path, '/') + 1; /* Assert existence of object if we are not dynamic */ if (!(es->flags & G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES) && !_g_strv_has_string ((const gchar * const *) children, requested_node)) goto out; } else { requested_node = NULL; } interfaces = es->vtable->introspect (es->connection, sender, es->object_path, requested_node, es->user_data); if (interfaces != NULL) { has_properties_interface = FALSE; has_introspectable_interface = FALSE; for (n = 0; interfaces[n] != NULL; n++) { if (strcmp (interfaces[n]->name, "org.freedesktop.DBus.Properties") == 0) has_properties_interface = TRUE; else if (strcmp (interfaces[n]->name, "org.freedesktop.DBus.Introspectable") == 0) has_introspectable_interface = TRUE; } if (!has_properties_interface) g_string_append (s, introspect_properties_interface); if (!has_introspectable_interface) g_string_append (s, introspect_introspectable_interface); for (n = 0; interfaces[n] != NULL; n++) { g_dbus_interface_info_generate_xml (interfaces[n], 2, s); g_dbus_interface_info_unref (interfaces[n]); } g_free (interfaces); } /* then include <node> entries from the Subtree for the root */ if (is_root) { for (n = 0; children != NULL && children[n] != NULL; n++) g_string_append_printf (s, " <node name=\"%s\"/>\n", children[n]); } /* finally include nodes registered below us */ subnode_paths = g_dbus_connection_list_registered (es->connection, requested_object_path); for (n = 0; subnode_paths != NULL && subnode_paths[n] != NULL; n++) g_string_append_printf (s, " <node name=\"%s\"/>\n", subnode_paths[n]); g_strfreev (subnode_paths); g_string_append (s, "</node>\n"); reply = g_dbus_message_new_method_reply (message); g_dbus_message_set_body (reply, g_variant_new ("(s)", s->str)); g_dbus_connection_send_message (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); handled = TRUE; out: g_string_free (s, TRUE); g_strfreev (children); return handled;}/* called without lock held */static gbooleanhandle_subtree_method_invocation (GDBusConnection *connection, ExportedSubtree *es, GDBusMessage *message){ gboolean handled; const gchar *sender; const gchar *interface_name; const gchar *member; const gchar *signature; const gchar *requested_object_path; const gchar *requested_node; gboolean is_root; GDBusInterfaceInfo *interface_info; const GDBusInterfaceVTable *interface_vtable; gpointer interface_user_data; guint n; GDBusInterfaceInfo **interfaces; gboolean is_property_get; gboolean is_property_set; gboolean is_property_get_all; handled = FALSE; interfaces = NULL; requested_object_path = g_dbus_message_get_path (message); sender = g_dbus_message_get_sender (message); interface_name = g_dbus_message_get_interface (message); member = g_dbus_message_get_member (message); signature = g_dbus_message_get_signature (message); is_root = (g_strcmp0 (requested_object_path, es->object_path) == 0); is_property_get = FALSE; is_property_set = FALSE; is_property_get_all = FALSE; if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Properties") == 0) { if (g_strcmp0 (member, "Get") == 0 && g_strcmp0 (signature, "ss") == 0) is_property_get = TRUE; else if (g_strcmp0 (member, "Set") == 0 && g_strcmp0 (signature, "ssv") == 0) is_property_set = TRUE; else if (g_strcmp0 (member, "GetAll") == 0 && g_strcmp0 (signature, "s") == 0) is_property_get_all = TRUE; } if (!is_root) { requested_node = strrchr (requested_object_path, '/') + 1; if (~es->flags & G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES) { /* We don't want to dispatch to unenumerated * nodes, so ensure that the child exists. */ gchar **children; gboolean exists; children = es->vtable->enumerate (es->connection, sender, es->object_path, es->user_data); exists = _g_strv_has_string ((const gchar * const *) children, requested_node); g_strfreev (children); if (!exists) goto out; } } else { requested_node = NULL; } /* get introspection data for the node */ interfaces = es->vtable->introspect (es->connection, sender, requested_object_path, requested_node, es->user_data); if (interfaces == NULL) goto out; interface_info = NULL; for (n = 0; interfaces[n] != NULL; n++) { if (g_strcmp0 (interfaces[n]->name, interface_name) == 0) interface_info = interfaces[n]; } /* dispatch the call if the user wants to handle it */ if (interface_info != NULL) { /* figure out where to dispatch the method call */ interface_user_data = NULL; interface_vtable = es->vtable->dispatch (es->connection, sender, es->object_path, interface_name, requested_node, &interface_user_data, es->user_data); if (interface_vtable == NULL) goto out; CONNECTION_LOCK (connection); handled = validate_and_maybe_schedule_method_call (es->connection, message, 0, es->id, interface_info, interface_vtable, es->context, interface_user_data); CONNECTION_UNLOCK (connection); } /* handle org.freedesktop.DBus.Properties interface if not explicitly handled */ else if (is_property_get || is_property_set || is_property_get_all) { if (is_property_get) g_variant_get (g_dbus_message_get_body (message), "(&s&s)", &interface_name, NULL); else if (is_property_set) g_variant_get (g_dbus_message_get_body (message), "(&s&sv)", &interface_name, NULL, NULL); else if (is_property_get_all) g_variant_get (g_dbus_message_get_body (message), "(&s)", &interface_name, NULL, NULL); else g_assert_not_reached (); /* see if the object supports this interface at all */ for (n = 0; interfaces[n] != NULL; n++) { if (g_strcmp0 (interfaces[n]->name, interface_name) == 0) interface_info = interfaces[n]; } /* Fail with org.freedesktop.DBus.Error.InvalidArgs if the user-code * claims it won't support the interface */ if (interface_info == NULL) { GDBusMessage *reply; reply = g_dbus_message_new_method_error (message, "org.freedesktop.DBus.Error.InvalidArgs", _("No such interface `%s'"), interface_name); g_dbus_connection_send_message (es->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); handled = TRUE; goto out; } /* figure out where to dispatch the property get/set/getall calls */ interface_user_data = NULL; interface_vtable = es->vtable->dispatch (es->connection, sender, es->object_path, interface_name, requested_node, &interface_user_data, es->user_data); if (interface_vtable == NULL) { g_warning ("The subtree introspection function indicates that '%s' " "is a valid interface name, but calling the dispatch " "function on that interface gave us NULL", interface_name); goto out; } if (is_property_get || is_property_set) { CONNECTION_LOCK (connection); handled = validate_and_maybe_schedule_property_getset (es->connection, message, 0, es->id, is_property_get, interface_info, interface_vtable, es->context, interface_user_data); CONNECTION_UNLOCK (connection); } else if (is_property_get_all) { CONNECTION_LOCK (connection); handled = validate_and_maybe_schedule_property_get_all (es->connection, message, 0, es->id, interface_info, interface_vtable, es->context, interface_user_data); CONNECTION_UNLOCK (connection); } } out: if (interfaces != NULL) { for (n = 0; interfaces[n] != NULL; n++) g_dbus_interface_info_unref (interfaces[n]); g_free (interfaces); } return handled;}typedef struct{ GDBusMessage *message; ExportedSubtree *es;} SubtreeDeferredData;static voidsubtree_deferred_data_free (SubtreeDeferredData *data){ g_object_unref (data->message); g_free (data);}/* called without lock held in the thread where the caller registered the subtree */static gbooleanprocess_subtree_vtable_message_in_idle_cb (gpointer _data){ SubtreeDeferredData *data = _data; gboolean handled; handled = FALSE; if (g_strcmp0 (g_dbus_message_get_interface (data->message), "org.freedesktop.DBus.Introspectable") == 0 && g_strcmp0 (g_dbus_message_get_member (data->message), "Introspect") == 0 && g_strcmp0 (g_dbus_message_get_signature (data->message), "") == 0) handled = handle_subtree_introspect (data->es->connection, data->es, data->message); else handled = handle_subtree_method_invocation (data->es->connection, data->es, data->message); if (!handled) { CONNECTION_LOCK (data->es->connection); handled = handle_generic_unlocked (data->es->connection, data->message); CONNECTION_UNLOCK (data->es->connection); } /* if we couldn't handle the request, just bail with the UnknownMethod error */ if (!handled) { GDBusMessage *reply; reply = g_dbus_message_new_method_error (data->message, "org.freedesktop.DBus.Error.UnknownMethod", _("Method `%s' on interface `%s' with signature `%s' does not exist"), g_dbus_message_get_member (data->message), g_dbus_message_get_interface (data->message), g_dbus_message_get_signature (data->message)); g_dbus_connection_send_message (data->es->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); } return FALSE;}/* called in message handler thread with lock held */static gbooleansubtree_message_func (GDBusConnection *connection, ExportedSubtree *es, GDBusMessage *message){ GSource *idle_source; SubtreeDeferredData *data; data = g_new0 (SubtreeDeferredData, 1); data->message = g_object_ref (message); data->es = es; /* defer this call to an idle handler in the right thread */ idle_source = g_idle_source_new (); g_source_set_priority (idle_source, G_PRIORITY_HIGH); g_source_set_callback (idle_source, process_subtree_vtable_message_in_idle_cb, data, (GDestroyNotify) subtree_deferred_data_free); g_source_attach (idle_source, es->context); g_source_unref (idle_source); /* since we own the entire subtree, handlers for objects not in the subtree have been * tried already by libdbus-1 - so we just need to ensure that we're always going * to reply to the message */ return TRUE;}/** * g_dbus_connection_register_subtree: * @connection: A #GDBusConnection. * @object_path: The object path to register the subtree at. * @vtable: A #GDBusSubtreeVTable to enumerate, introspect and dispatch nodes in the subtree. * @flags: Flags used to fine tune the behavior of the subtree. * @user_data: Data to pass to functions in @vtable. * @user_data_free_func: Function to call when the subtree is unregistered. * @error: Return location for error or %NULL. * * Registers a whole subtree of <quote>dynamic</quote> objects. * * The @enumerate and @introspection functions in @vtable are used to * convey, to remote callers, what nodes exist in the subtree rooted * by @object_path. * * When handling remote calls into any node in the subtree, first the * @enumerate function is used to check if the node exists. If the node exists * or the #G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES flag is set * the @introspection function is used to check if the node supports the * requested method. If so, the @dispatch function is used to determine * where to dispatch the call. The collected #GDBusInterfaceVTable and * #gpointer will be used to call into the interface vtable for processing * the request. * * All calls into user-provided code will be invoked in the <link * linkend="g-main-context-push-thread-default">thread-default main * loop</link> of the thread you are calling this method from. * * If an existing subtree is already registered at @object_path or * then @error is set to #G_IO_ERROR_EXISTS. * * Note that it is valid to register regular objects (using * g_dbus_connection_register_object()) in a subtree registered with * g_dbus_connection_register_subtree() - if so, the subtree handler * is tried as the last resort. One way to think about a subtree * handler is to consider it a <quote>fallback handler</quote> * for object paths not registered via g_dbus_connection_register_object() * or other bindings. * * Note that @vtable will be copied so you cannot change it after * registration. * * See <xref linkend="gdbus-subtree-server"/> for an example of how to use this method. * * Returns: 0 if @error is set, otherwise a subtree registration id (never 0) * that can be used with g_dbus_connection_unregister_subtree() . * * Since: 2.26 */guintg_dbus_connection_register_subtree (GDBusConnection *connection, const gchar *object_path, const GDBusSubtreeVTable *vtable, GDBusSubtreeFlags flags, gpointer user_data, GDestroyNotify user_data_free_func, GError **error){ guint ret; ExportedSubtree *es; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0); g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), 0); g_return_val_if_fail (vtable != NULL, 0); g_return_val_if_fail (error == NULL || *error == NULL, 0); ret = 0; CONNECTION_LOCK (connection); es = g_hash_table_lookup (connection->map_object_path_to_es, object_path); if (es != NULL) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_EXISTS, _("A subtree is already exported for %s"), object_path); goto out; } es = g_new0 (ExportedSubtree, 1); es->object_path = g_strdup (object_path); es->connection = connection; es->vtable = _g_dbus_subtree_vtable_copy (vtable); es->flags = flags; es->id = _global_subtree_registration_id++; /* TODO: overflow etc. */ es->user_data = user_data; es->user_data_free_func = user_data_free_func; es->context = g_main_context_get_thread_default (); if (es->context != NULL) g_main_context_ref (es->context); g_hash_table_insert (connection->map_object_path_to_es, es->object_path, es); g_hash_table_insert (connection->map_id_to_es, GUINT_TO_POINTER (es->id), es); ret = es->id; out: CONNECTION_UNLOCK (connection); return ret;}/* ---------------------------------------------------------------------------------------------------- *//** * g_dbus_connection_unregister_subtree: * @connection: A #GDBusConnection. * @registration_id: A subtree registration id obtained from g_dbus_connection_register_subtree(). * * Unregisters a subtree. * * Returns: %TRUE if the subtree was unregistered, %FALSE otherwise. * * Since: 2.26 */gbooleang_dbus_connection_unregister_subtree (GDBusConnection *connection, guint registration_id){ ExportedSubtree *es; gboolean ret; g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE); ret = FALSE; CONNECTION_LOCK (connection); es = g_hash_table_lookup (connection->map_id_to_es, GUINT_TO_POINTER (registration_id)); if (es == NULL) goto out; g_warn_if_fail (g_hash_table_remove (connection->map_id_to_es, GUINT_TO_POINTER (es->id))); g_warn_if_fail (g_hash_table_remove (connection->map_object_path_to_es, es->object_path)); ret = TRUE; out: CONNECTION_UNLOCK (connection); return ret;}/* ---------------------------------------------------------------------------------------------------- *//* must be called with lock held */static voidhandle_generic_ping_unlocked (GDBusConnection *connection, const gchar *object_path, GDBusMessage *message){ GDBusMessage *reply; reply = g_dbus_message_new_method_reply (message); g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply);}/* must be called with lock held */static voidhandle_generic_get_machine_id_unlocked (GDBusConnection *connection, const gchar *object_path, GDBusMessage *message){ GDBusMessage *reply; reply = NULL; if (connection->machine_id == NULL) { GError *error; error = NULL; connection->machine_id = _g_dbus_get_machine_id (&error); if (connection->machine_id == NULL) { reply = g_dbus_message_new_method_error_literal (message, "org.freedesktop.DBus.Error.Failed", error->message); g_error_free (error); } } if (reply == NULL) { reply = g_dbus_message_new_method_reply (message); g_dbus_message_set_body (reply, g_variant_new ("(s)", connection->machine_id)); } g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply);}/* must be called with lock held */static voidhandle_generic_introspect_unlocked (GDBusConnection *connection, const gchar *object_path, GDBusMessage *message){ guint n; GString *s; gchar **registered; GDBusMessage *reply; /* first the header */ s = g_string_new (NULL); introspect_append_header (s); registered = g_dbus_connection_list_registered_unlocked (connection, object_path); for (n = 0; registered != NULL && registered[n] != NULL; n++) g_string_append_printf (s, " <node name=\"%s\"/>\n", registered[n]); g_strfreev (registered); g_string_append (s, "</node>\n"); reply = g_dbus_message_new_method_reply (message); g_dbus_message_set_body (reply, g_variant_new ("(s)", s->str)); g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); g_string_free (s, TRUE);}/* must be called with lock held */static gbooleanhandle_generic_unlocked (GDBusConnection *connection, GDBusMessage *message){ gboolean handled; const gchar *interface_name; const gchar *member; const gchar *signature; const gchar *path; CONNECTION_ENSURE_LOCK (connection); handled = FALSE; interface_name = g_dbus_message_get_interface (message); member = g_dbus_message_get_member (message); signature = g_dbus_message_get_signature (message); path = g_dbus_message_get_path (message); if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Introspectable") == 0 && g_strcmp0 (member, "Introspect") == 0 && g_strcmp0 (signature, "") == 0) { handle_generic_introspect_unlocked (connection, path, message); handled = TRUE; } else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Peer") == 0 && g_strcmp0 (member, "Ping") == 0 && g_strcmp0 (signature, "") == 0) { handle_generic_ping_unlocked (connection, path, message); handled = TRUE; } else if (g_strcmp0 (interface_name, "org.freedesktop.DBus.Peer") == 0 && g_strcmp0 (member, "GetMachineId") == 0 && g_strcmp0 (signature, "") == 0) { handle_generic_get_machine_id_unlocked (connection, path, message); handled = TRUE; } return handled;}/* ---------------------------------------------------------------------------------------------------- *//* called in message handler thread with lock held */static voiddistribute_method_call (GDBusConnection *connection, GDBusMessage *message){ GDBusMessage *reply; ExportedObject *eo; ExportedSubtree *es; const gchar *object_path; const gchar *interface_name; const gchar *member; const gchar *signature; const gchar *path; gchar *subtree_path; gchar *needle; g_assert (g_dbus_message_get_message_type (message) == G_DBUS_MESSAGE_TYPE_METHOD_CALL); interface_name = g_dbus_message_get_interface (message); member = g_dbus_message_get_member (message); signature = g_dbus_message_get_signature (message); path = g_dbus_message_get_path (message); subtree_path = g_strdup (path); needle = strrchr (subtree_path, '/'); if (needle != NULL && needle != subtree_path) { *needle = '\0'; } else { g_free (subtree_path); subtree_path = NULL; } if (G_UNLIKELY (_g_dbus_debug_incoming ())) { _g_dbus_debug_print_lock (); g_print ("========================================================================\n" "GDBus-debug:Incoming:\n" " <<<< METHOD INVOCATION %s.%s()\n" " on object %s\n" " invoked by name %s\n" " serial %d\n", interface_name, member, path, g_dbus_message_get_sender (message) != NULL ? g_dbus_message_get_sender (message) : "(none)", g_dbus_message_get_serial (message)); _g_dbus_debug_print_unlock (); }#if 0 g_debug ("interface = `%s'", interface_name); g_debug ("member = `%s'", member); g_debug ("signature = `%s'", signature); g_debug ("path = `%s'", path); g_debug ("subtree_path = `%s'", subtree_path != NULL ? subtree_path : "N/A");#endif object_path = g_dbus_message_get_path (message); g_assert (object_path != NULL); eo = g_hash_table_lookup (connection->map_object_path_to_eo, object_path); if (eo != NULL) { if (obj_message_func (connection, eo, message)) goto out; } es = g_hash_table_lookup (connection->map_object_path_to_es, object_path); if (es != NULL) { if (subtree_message_func (connection, es, message)) goto out; } if (subtree_path != NULL) { es = g_hash_table_lookup (connection->map_object_path_to_es, subtree_path); if (es != NULL) { if (subtree_message_func (connection, es, message)) goto out; } } if (handle_generic_unlocked (connection, message)) goto out; /* if we end up here, the message has not been not handled - so return an error saying this */ reply = g_dbus_message_new_method_error (message, "org.freedesktop.DBus.Error.UnknownMethod", _("No such interface `%s' on object at path %s"), interface_name, object_path); g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL); g_object_unref (reply); out: g_free (subtree_path);}/* ---------------------------------------------------------------------------------------------------- */static GDBusConnection **message_bus_get_singleton (GBusType bus_type, GError **error){ GDBusConnection **ret; const gchar *starter_bus; ret = NULL; switch (bus_type) { case G_BUS_TYPE_SESSION: ret = &the_session_bus; break; case G_BUS_TYPE_SYSTEM: ret = &the_system_bus; break; case G_BUS_TYPE_STARTER: starter_bus = g_getenv ("DBUS_STARTER_BUS_TYPE"); if (g_strcmp0 (starter_bus, "session") == 0) { ret = message_bus_get_singleton (G_BUS_TYPE_SESSION, error); goto out; } else if (g_strcmp0 (starter_bus, "system") == 0) { ret = message_bus_get_singleton (G_BUS_TYPE_SYSTEM, error); goto out; } else { if (starter_bus != NULL) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Cannot determine bus address from DBUS_STARTER_BUS_TYPE environment variable" " - unknown value `%s'"), starter_bus); } else { g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Cannot determine bus address because the DBUS_STARTER_BUS_TYPE environment " "variable is not set")); } } break; default: g_assert_not_reached (); break; } out: return ret;}static GDBusConnection *get_uninitialized_connection (GBusType bus_type, GCancellable *cancellable, GError **error){ GDBusConnection **singleton; GDBusConnection *ret; ret = NULL; G_LOCK (message_bus_lock); singleton = message_bus_get_singleton (bus_type, error); if (singleton == NULL) goto out; if (*singleton == NULL) { gchar *address; address = g_dbus_address_get_for_bus_sync (bus_type, cancellable, error); if (address == NULL) goto out; ret = *singleton = g_object_new (G_TYPE_DBUS_CONNECTION, "address", address, "flags", G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT | G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION, "exit-on-close", TRUE, NULL); g_free (address); } else { ret = g_object_ref (*singleton); } g_assert (ret != NULL); out: G_UNLOCK (message_bus_lock); return ret;}/** * g_bus_get_sync: * @bus_type: A #GBusType. * @cancellable: A #GCancellable or %NULL. * @error: Return location for error or %NULL. * * Synchronously connects to the message bus specified by @bus_type. * Note that the returned object may shared with other callers, * e.g. if two separate parts of a process calls this function with * the same @bus_type, they will share the same object. * * This is a synchronous failable function. See g_bus_get() and * g_bus_get_finish() for the asynchronous version. * * The returned object is a singleton, that is, shared with other * callers of g_bus_get() and g_bus_get_sync() for @bus_type. In the * event that you need a private message bus connection, use * g_dbus_address_get_for_bus_sync() and * g_dbus_connection_new_for_address(). * * Note that the returned #GDBusConnection object will (usually) have * the #GDBusConnection:exit-on-close property set to %TRUE. * * Returns: (transfer full): A #GDBusConnection or %NULL if @error is set. Free with g_object_unref(). * * Since: 2.26 */GDBusConnection *g_bus_get_sync (GBusType bus_type, GCancellable *cancellable, GError **error){ GDBusConnection *connection; g_return_val_if_fail (error == NULL || *error == NULL, NULL); connection = get_uninitialized_connection (bus_type, cancellable, error); if (connection == NULL) goto out; if (!g_initable_init (G_INITABLE (connection), cancellable, error)) { g_object_unref (connection); connection = NULL; } out: return connection;}static voidbus_get_async_initable_cb (GObject *source_object, GAsyncResult *res, gpointer user_data){ GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data); GError *error; error = NULL; if (!g_async_initable_init_finish (G_ASYNC_INITABLE (source_object), res, &error)) { g_assert (error != NULL); g_simple_async_result_take_error (simple, error); g_object_unref (source_object); } else { g_simple_async_result_set_op_res_gpointer (simple, source_object, g_object_unref); } g_simple_async_result_complete_in_idle (simple); g_object_unref (simple);}/** * g_bus_get: * @bus_type: A #GBusType. * @cancellable: A #GCancellable or %NULL. * @callback: A #GAsyncReadyCallback to call when the request is satisfied. * @user_data: The data to pass to @callback. * * Asynchronously connects to the message bus specified by @bus_type. * * When the operation is finished, @callback will be invoked. You can * then call g_bus_get_finish() to get the result of the operation. * * This is a asynchronous failable function. See g_bus_get_sync() for * the synchronous version. * * Since: 2.26 */voidg_bus_get (GBusType bus_type, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data){ GDBusConnection *connection; GSimpleAsyncResult *simple; GError *error; simple = g_simple_async_result_new (NULL, callback, user_data, g_bus_get); error = NULL; connection = get_uninitialized_connection (bus_type, cancellable, &error); if (connection == NULL) { g_assert (error != NULL); g_simple_async_result_take_error (simple, error); g_simple_async_result_complete_in_idle (simple); g_object_unref (simple); } else { g_async_initable_init_async (G_ASYNC_INITABLE (connection), G_PRIORITY_DEFAULT, cancellable, bus_get_async_initable_cb, simple); }}/** * g_bus_get_finish: * @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_bus_get(). * @error: Return location for error or %NULL. * * Finishes an operation started with g_bus_get(). * * The returned object is a singleton, that is, shared with other * callers of g_bus_get() and g_bus_get_sync() for @bus_type. In the * event that you need a private message bus connection, use * g_dbus_address_get_for_bus() and * g_dbus_connection_new_for_address(). * * Note that the returned #GDBusConnection object will (usually) have * the #GDBusConnection:exit-on-close property set to %TRUE. * * Returns: (transfer full): A #GDBusConnection or %NULL if @error is set. Free with g_object_unref(). * * Since: 2.26 */GDBusConnection *g_bus_get_finish (GAsyncResult *res, GError **error){ GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res); GObject *object; GDBusConnection *ret; g_return_val_if_fail (error == NULL || *error == NULL, NULL); g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_bus_get); ret = NULL; if (g_simple_async_result_propagate_error (simple, error)) goto out; object = g_simple_async_result_get_op_res_gpointer (simple); g_assert (object != NULL); ret = g_object_ref (G_DBUS_CONNECTION (object)); out: return ret;}/* ---------------------------------------------------------------------------------------------------- */ |
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