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632a224cab
The GDBus thread might be holding a ref while requesting to remove the filter. https://bugzilla.gnome.org/show_bug.cgi?id=779409
7390 lines
262 KiB
C
7390 lines
262 KiB
C
/* GDBus - GLib D-Bus Library
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*
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* Copyright (C) 2008-2010 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: David Zeuthen <davidz@redhat.com>
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*/
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/*
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* TODO for GDBus:
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*
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* - would be nice to expose GDBusAuthMechanism and an extension point
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*
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* - Need to rewrite GDBusAuth and rework GDBusAuthMechanism. In particular
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* the mechanism VFuncs need to be able to set an error.
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*
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* - Need to document other mechanisms/sources for determining the D-Bus
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* address of a well-known bus.
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*
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* - e.g. on Win32 we need code like from here
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*
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* http://cgit.freedesktop.org/~david/gdbus-standalone/tree/gdbus/gdbusaddress.c#n900
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*
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* that was never copied over here because it originally was copy-paste
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* from the GPLv2 / AFL 2.1 libdbus sources.
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*
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* - on OS X we need to look in launchd for the address
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*
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* https://bugs.freedesktop.org/show_bug.cgi?id=14259
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*
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* - on X11 we need to look in a X11 property on the X server
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* - (we can also just use dbus-launch(1) from the D-Bus
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* distribution)
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*
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* - (ideally) this requires D-Bus spec work because none of
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* this has never really been specced out properly (except
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* the X11 bits)
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*
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* - Related to the above, we also need to be able to launch a message bus
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* instance.... Since we don't want to write our own bus daemon we should
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* launch dbus-daemon(1) (thus: Win32 and OS X need to bundle it)
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*
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* - probably want a G_DBUS_NONCE_TCP_TMPDIR environment variable
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* to specify where the nonce is stored. This will allow people to use
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* G_DBUS_NONCE_TCP_TMPDIR=/mnt/secure.company.server/dbus-nonce-dir
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* to easily achieve secure RPC via nonce-tcp.
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*
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* - need to expose an extension point for resolving D-Bus address and
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* turning them into GIOStream objects. This will allow us to implement
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* e.g. X11 D-Bus transports without dlopen()'ing or linking against
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* libX11 from libgio.
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* - see g_dbus_address_connect() in gdbusaddress.c
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*
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* - would be cute to use kernel-specific APIs to resolve fds for
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* debug output when using G_DBUS_DEBUG=message, e.g. in addition to
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*
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* fd 21: dev=8:1,mode=0100644,ino=1171231,uid=0,gid=0,rdev=0:0,size=234,atime=1273070640,mtime=1267126160,ctime=1267126160
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*
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* maybe we can show more information about what fd 21 really is.
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* Ryan suggests looking in /proc/self/fd for clues / symlinks!
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* Initial experiments on Linux 2.6 suggests that the symlink looks
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* like this:
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*
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* 3 -> /proc/18068/fd
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*
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* e.g. not of much use.
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*
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* - GDBus High-Level docs
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* - Proxy: properties, signals...
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* - Connection: IOStream based, ::close, connection setup steps
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* mainloop integration, threading
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* - Differences from libdbus (extend "Migrating from")
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* - the message handling thread
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* - Using GVariant instead of GValue
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* - Explain why the high-level API is a good thing and what
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* kind of pitfalls it avoids
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* - Export objects before claiming names
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* - Talk about auto-starting services (cf. GBusNameWatcherFlags)
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*
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* - use abstract sockets in test code
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* - right now it doesn't work, dbus-daemon(1) fails with
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*
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* /gdbus/connection/filter: Failed to start message bus: Failed to bind
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* socket "/tmp/g-dbus-tests-pid-28531": Address already in use
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* ** WARNING **: Error reading address from dbus daemon, 0 bytes read
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*
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* or similar.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include "gdbusauth.h"
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#include "gdbusutils.h"
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#include "gdbusaddress.h"
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#include "gdbusmessage.h"
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#include "gdbusconnection.h"
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#include "gdbuserror.h"
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#include "gioenumtypes.h"
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#include "gdbusintrospection.h"
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#include "gdbusmethodinvocation.h"
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#include "gdbusprivate.h"
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#include "gdbusauthobserver.h"
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#include "ginitable.h"
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#include "gasyncinitable.h"
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#include "giostream.h"
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#include "gasyncresult.h"
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#include "gtask.h"
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#ifdef G_OS_UNIX
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#include "gunixconnection.h"
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#include "gunixfdmessage.h"
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#endif
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#include "glibintl.h"
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/**
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* SECTION:gdbusconnection
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* @short_description: D-Bus Connections
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* @include: gio/gio.h
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*
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* The #GDBusConnection type is used for D-Bus connections to remote
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* peers such as a message buses. It is a low-level API that offers a
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* lot of flexibility. For instance, it lets you establish a connection
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* over any transport that can by represented as an #GIOStream.
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*
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* This class is rarely used directly in D-Bus clients. If you are writing
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* a D-Bus client, it is often easier to use the g_bus_own_name(),
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* g_bus_watch_name() or g_dbus_proxy_new_for_bus() APIs.
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*
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* As an exception to the usual GLib rule that a particular object must not
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* be used by two threads at the same time, #GDBusConnection's methods may be
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* called from any thread. This is so that g_bus_get() and g_bus_get_sync()
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* can safely return the same #GDBusConnection when called from any thread.
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*
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* Most of the ways to obtain a #GDBusConnection automatically initialize it
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* (i.e. connect to D-Bus): for instance, g_dbus_connection_new() and
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* g_bus_get(), and the synchronous versions of those methods, give you an
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* initialized connection. Language bindings for GIO should use
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* g_initable_new() or g_async_initable_new_async(), which also initialize the
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* connection.
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*
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* If you construct an uninitialized #GDBusConnection, such as via
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* g_object_new(), you must initialize it via g_initable_init() or
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* g_async_initable_init_async() before using its methods or properties.
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* Calling methods or accessing properties on a #GDBusConnection that has not
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* completed initialization successfully is considered to be invalid, and leads
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* to undefined behaviour. In particular, if initialization fails with a
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* #GError, the only valid thing you can do with that #GDBusConnection is to
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* free it with g_object_unref().
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*
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* ## An example D-Bus server # {#gdbus-server}
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*
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* Here is an example for a D-Bus server:
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* [gdbus-example-server.c](https://git.gnome.org/browse/glib/tree/gio/tests/gdbus-example-server.c)
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*
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* ## An example for exporting a subtree # {#gdbus-subtree-server}
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*
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* Here is an example for exporting a subtree:
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* [gdbus-example-subtree.c](https://git.gnome.org/browse/glib/tree/gio/tests/gdbus-example-subtree.c)
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*
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* ## An example for file descriptor passing # {#gdbus-unix-fd-client}
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*
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* Here is an example for passing UNIX file descriptors:
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* [gdbus-unix-fd-client.c](https://git.gnome.org/browse/glib/tree/gio/tests/gdbus-unix-fd-client.c)
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*
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* ## An example for exporting a GObject # {#gdbus-export}
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*
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* Here is an example for exporting a #GObject:
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* [gdbus-example-export.c](https://git.gnome.org/browse/glib/tree/gio/tests/gdbus-example-export.c)
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*/
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/* ---------------------------------------------------------------------------------------------------- */
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typedef struct _GDBusConnectionClass GDBusConnectionClass;
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/**
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* GDBusConnectionClass:
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* @closed: Signal class handler for the #GDBusConnection::closed signal.
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*
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* Class structure for #GDBusConnection.
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*
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* Since: 2.26
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*/
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struct _GDBusConnectionClass
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{
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/*< private >*/
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GObjectClass parent_class;
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/*< public >*/
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/* Signals */
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void (*closed) (GDBusConnection *connection,
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gboolean remote_peer_vanished,
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GError *error);
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};
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G_LOCK_DEFINE_STATIC (message_bus_lock);
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static GWeakRef the_session_bus;
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static GWeakRef the_system_bus;
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/* Extra pseudo-member of GDBusSendMessageFlags.
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* Set by initable_init() to indicate that despite not being initialized yet,
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* enough of the only-valid-after-init members are set that we can send a
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* message, and we're being called from its thread, so no memory barrier is
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* required before accessing them.
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*/
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#define SEND_MESSAGE_FLAGS_INITIALIZING (1u << 31)
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/* Same as SEND_MESSAGE_FLAGS_INITIALIZING, but in GDBusCallFlags */
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#define CALL_FLAGS_INITIALIZING (1u << 31)
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/* ---------------------------------------------------------------------------------------------------- */
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typedef struct
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{
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GDestroyNotify callback;
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gpointer user_data;
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GMainContext *context;
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} CallDestroyNotifyData;
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static gboolean
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call_destroy_notify_data_in_idle (gpointer user_data)
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{
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CallDestroyNotifyData *data = user_data;
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data->callback (data->user_data);
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return FALSE;
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}
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static void
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call_destroy_notify_data_free (CallDestroyNotifyData *data)
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{
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if (data->context != NULL)
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g_main_context_unref (data->context);
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g_free (data);
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}
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/*
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* call_destroy_notify: <internal>
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* @context: (nullable): A #GMainContext or %NULL.
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* @callback: (nullable): A #GDestroyNotify or %NULL.
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* @user_data: Data to pass to @callback.
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*
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* Schedules @callback to run in @context.
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*/
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static void
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call_destroy_notify (GMainContext *context,
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GDestroyNotify callback,
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gpointer user_data)
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{
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GSource *idle_source;
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CallDestroyNotifyData *data;
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if (callback == NULL)
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goto out;
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data = g_new0 (CallDestroyNotifyData, 1);
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data->callback = callback;
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data->user_data = user_data;
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data->context = context;
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if (data->context != NULL)
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g_main_context_ref (data->context);
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idle_source = g_idle_source_new ();
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g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
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g_source_set_callback (idle_source,
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call_destroy_notify_data_in_idle,
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data,
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(GDestroyNotify) call_destroy_notify_data_free);
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g_source_set_name (idle_source, "[gio] call_destroy_notify_data_in_idle");
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g_source_attach (idle_source, data->context);
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g_source_unref (idle_source);
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out:
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;
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}
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/* ---------------------------------------------------------------------------------------------------- */
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static gboolean
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_g_strv_has_string (const gchar* const *haystack,
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const gchar *needle)
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{
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guint n;
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for (n = 0; haystack != NULL && haystack[n] != NULL; n++)
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{
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if (g_strcmp0 (haystack[n], needle) == 0)
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return TRUE;
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}
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return FALSE;
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}
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/* ---------------------------------------------------------------------------------------------------- */
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#ifdef G_OS_WIN32
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#define CONNECTION_ENSURE_LOCK(obj) do { ; } while (FALSE)
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#else
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// TODO: for some reason this doesn't work on Windows
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#define CONNECTION_ENSURE_LOCK(obj) do { \
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if (G_UNLIKELY (g_mutex_trylock(&(obj)->lock))) \
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{ \
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g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
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"CONNECTION_ENSURE_LOCK: GDBusConnection object lock is not locked"); \
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} \
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} while (FALSE)
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#endif
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#define CONNECTION_LOCK(obj) do { \
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g_mutex_lock (&(obj)->lock); \
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} while (FALSE)
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#define CONNECTION_UNLOCK(obj) do { \
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g_mutex_unlock (&(obj)->lock); \
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} while (FALSE)
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/* Flags in connection->atomic_flags */
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enum {
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FLAG_INITIALIZED = 1 << 0,
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FLAG_EXIT_ON_CLOSE = 1 << 1,
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FLAG_CLOSED = 1 << 2
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};
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/**
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* GDBusConnection:
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*
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* The #GDBusConnection structure contains only private data and
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* should only be accessed using the provided API.
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*
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* Since: 2.26
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*/
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struct _GDBusConnection
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{
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/*< private >*/
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GObject parent_instance;
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/* ------------------------------------------------------------------------ */
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/* -- General object state ------------------------------------------------ */
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/* ------------------------------------------------------------------------ */
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/* General-purpose lock for most fields */
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GMutex lock;
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/* A lock used in the init() method of the GInitable interface - see comments
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* in initable_init() for why a separate lock is needed.
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*
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* If you need both @lock and @init_lock, you must take @init_lock first.
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*/
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GMutex init_lock;
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/* Set (by loading the contents of /var/lib/dbus/machine-id) the first time
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* someone calls org.freedesktop.DBus.Peer.GetMachineId(). Protected by @lock.
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*/
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gchar *machine_id;
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/* The underlying stream used for communication
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* Read-only after initable_init(), so it may be read if you either
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* hold @init_lock or check for initialization first.
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*/
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GIOStream *stream;
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/* The object used for authentication (if any).
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* Read-only after initable_init(), so it may be read if you either
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* hold @init_lock or check for initialization first.
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*/
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GDBusAuth *auth;
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/* Last serial used. Protected by @lock. */
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guint32 last_serial;
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/* The object used to send/receive messages.
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* Read-only after initable_init(), so it may be read if you either
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* hold @init_lock or check for initialization first.
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*/
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GDBusWorker *worker;
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/* If connected to a message bus, this contains the unique name assigned to
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* us by the bus (e.g. ":1.42").
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* Read-only after initable_init(), so it may be read if you either
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* hold @init_lock or check for initialization first.
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*/
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gchar *bus_unique_name;
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/* The GUID returned by the other side if we authenticed as a client or
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* the GUID to use if authenticating as a server.
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* Read-only after initable_init(), so it may be read if you either
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* hold @init_lock or check for initialization first.
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*/
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gchar *guid;
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/* FLAG_INITIALIZED is set exactly when initable_init() has finished running.
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* Inspect @initialization_error to see whether it succeeded or failed.
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*
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* FLAG_EXIT_ON_CLOSE is the exit-on-close property.
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*
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* FLAG_CLOSED is the closed property. It may be read at any time, but
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* may only be written while holding @lock.
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*/
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volatile gint atomic_flags;
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/* If the connection could not be established during initable_init(),
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* this GError will be set.
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* Read-only after initable_init(), so it may be read if you either
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* hold @init_lock or check for initialization first.
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*/
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GError *initialization_error;
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/* The result of g_main_context_ref_thread_default() when the object
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* was created (the GObject _init() function) - this is used for delivery
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* of the :closed GObject signal.
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*
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* Only set in the GObject init function, so no locks are needed.
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*/
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GMainContext *main_context_at_construction;
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/* Read-only construct properties, no locks needed */
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gchar *address;
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GDBusConnectionFlags flags;
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/* Map used for managing method replies, protected by @lock */
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GHashTable *map_method_serial_to_task; /* guint32 -> GTask* */
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/* Maps used for managing signal subscription, protected by @lock */
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GHashTable *map_rule_to_signal_data; /* match rule (gchar*) -> SignalData */
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GHashTable *map_id_to_signal_data; /* id (guint) -> SignalData */
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GHashTable *map_sender_unique_name_to_signal_data_array; /* unique sender (gchar*) -> GPtrArray* of SignalData */
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/* Maps used for managing exported objects and subtrees,
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* protected by @lock
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*/
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GHashTable *map_object_path_to_eo; /* gchar* -> ExportedObject* */
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GHashTable *map_id_to_ei; /* guint -> ExportedInterface* */
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GHashTable *map_object_path_to_es; /* gchar* -> ExportedSubtree* */
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GHashTable *map_id_to_es; /* guint -> ExportedSubtree* */
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/* Map used for storing last used serials for each thread, protected by @lock */
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GHashTable *map_thread_to_last_serial;
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/* Structure used for message filters, protected by @lock */
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GPtrArray *filters;
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/* Capabilities negotiated during authentication
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* Read-only after initable_init(), so it may be read without holding a
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* lock, if you check for initialization first.
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*/
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GDBusCapabilityFlags capabilities;
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/* Protected by @init_lock */
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GDBusAuthObserver *authentication_observer;
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/* Read-only after initable_init(), so it may be read if you either
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* hold @init_lock or check for initialization first.
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*/
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GCredentials *credentials;
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/* set to TRUE when finalizing */
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gboolean finalizing;
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};
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typedef struct ExportedObject ExportedObject;
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static void exported_object_free (ExportedObject *eo);
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typedef struct ExportedSubtree ExportedSubtree;
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static void exported_subtree_free (ExportedSubtree *es);
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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);
|
|
|
|
static void schedule_method_call (GDBusConnection *connection,
|
|
GDBusMessage *message,
|
|
guint registration_id,
|
|
guint subtree_registration_id,
|
|
const GDBusInterfaceInfo *interface_info,
|
|
const GDBusMethodInfo *method_info,
|
|
const GDBusPropertyInfo *property_info,
|
|
GVariant *parameters,
|
|
const GDBusInterfaceVTable *vtable,
|
|
GMainContext *main_context,
|
|
gpointer user_data);
|
|
|
|
#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)
|
|
);
|
|
|
|
/*
|
|
* Check that all members of @connection that can only be accessed after
|
|
* the connection is initialized can safely be accessed. If not,
|
|
* log a critical warning. This function is a memory barrier.
|
|
*
|
|
* Returns: %TRUE if initialized
|
|
*/
|
|
static gboolean
|
|
check_initialized (GDBusConnection *connection)
|
|
{
|
|
/* The access to @atomic_flags isn't conditional, so that this function
|
|
* provides a memory barrier for thread-safety even if checks are disabled.
|
|
* (If you don't want this stricter guarantee, you can call
|
|
* g_return_if_fail (check_initialized (c)).)
|
|
*
|
|
* This isn't strictly necessary now that we've decided use of an
|
|
* uninitialized GDBusConnection is undefined behaviour, but it seems
|
|
* better to be as deterministic as is feasible.
|
|
*
|
|
* (Anything that could suffer a crash from seeing undefined values
|
|
* must have a race condition - thread A initializes the connection while
|
|
* thread B calls a method without initialization, hoping that thread A will
|
|
* win the race - so its behaviour is undefined anyway.)
|
|
*/
|
|
gint flags = g_atomic_int_get (&connection->atomic_flags);
|
|
|
|
g_return_val_if_fail (flags & FLAG_INITIALIZED, FALSE);
|
|
|
|
/* We can safely access this, due to the memory barrier above */
|
|
g_return_val_if_fail (connection->initialization_error == NULL, FALSE);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
typedef enum {
|
|
MAY_BE_UNINITIALIZED = (1<<1)
|
|
} CheckUnclosedFlags;
|
|
|
|
/*
|
|
* Check the same thing as check_initialized(), and also that the
|
|
* connection is not closed. If the connection is uninitialized,
|
|
* raise a critical warning (it's programmer error); if it's closed,
|
|
* raise a recoverable GError (it's a runtime error).
|
|
*
|
|
* This function is a memory barrier.
|
|
*
|
|
* Returns: %TRUE if initialized and not closed
|
|
*/
|
|
static gboolean
|
|
check_unclosed (GDBusConnection *connection,
|
|
CheckUnclosedFlags check,
|
|
GError **error)
|
|
{
|
|
/* check_initialized() is effectively inlined, so we don't waste time
|
|
* doing two memory barriers
|
|
*/
|
|
gint flags = g_atomic_int_get (&connection->atomic_flags);
|
|
|
|
if (!(check & MAY_BE_UNINITIALIZED))
|
|
{
|
|
g_return_val_if_fail (flags & FLAG_INITIALIZED, FALSE);
|
|
g_return_val_if_fail (connection->initialization_error == NULL, FALSE);
|
|
}
|
|
|
|
if (flags & FLAG_CLOSED)
|
|
{
|
|
g_set_error_literal (error,
|
|
G_IO_ERROR,
|
|
G_IO_ERROR_CLOSED,
|
|
_("The connection is closed"));
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GHashTable *alive_connections = NULL;
|
|
|
|
static void
|
|
g_dbus_connection_dispose (GObject *object)
|
|
{
|
|
GDBusConnection *connection = G_DBUS_CONNECTION (object);
|
|
|
|
G_LOCK (message_bus_lock);
|
|
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 void
|
|
g_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)
|
|
{
|
|
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_task);
|
|
|
|
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);
|
|
|
|
g_hash_table_unref (connection->map_thread_to_last_serial);
|
|
|
|
g_main_context_unref (connection->main_context_at_construction);
|
|
|
|
g_free (connection->machine_id);
|
|
|
|
g_mutex_clear (&connection->init_lock);
|
|
g_mutex_clear (&connection->lock);
|
|
|
|
G_OBJECT_CLASS (g_dbus_connection_parent_class)->finalize (object);
|
|
}
|
|
|
|
/* called in any user thread, with the connection's lock not held */
|
|
static void
|
|
g_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;
|
|
}
|
|
}
|
|
|
|
/* called in any user thread, with the connection's lock not held */
|
|
static void
|
|
g_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;
|
|
}
|
|
}
|
|
|
|
/* Base-class implementation of GDBusConnection::closed.
|
|
*
|
|
* Called in a user thread, by the main context that was thread-default when
|
|
* the object was constructed.
|
|
*/
|
|
static void
|
|
g_dbus_connection_real_closed (GDBusConnection *connection,
|
|
gboolean remote_peer_vanished,
|
|
GError *error)
|
|
{
|
|
gint flags = g_atomic_int_get (&connection->atomic_flags);
|
|
|
|
/* Because atomic int access is a memory barrier, we can safely read
|
|
* initialization_error without a lock, as long as we do it afterwards.
|
|
*/
|
|
if (remote_peer_vanished &&
|
|
(flags & FLAG_EXIT_ON_CLOSE) != 0 &&
|
|
(flags & FLAG_INITIALIZED) != 0 &&
|
|
connection->initialization_error == NULL)
|
|
{
|
|
raise (SIGTERM);
|
|
}
|
|
}
|
|
|
|
static void
|
|
g_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.
|
|
*
|
|
* If this is passed on construction and is a #GSocketConnection,
|
|
* then the corresponding #GSocket will be put into non-blocking mode.
|
|
*
|
|
* While the #GDBusConnection is active, it will interact with this
|
|
* stream from a worker thread, so it is not safe to interact with
|
|
* the stream directly.
|
|
*
|
|
* 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 `raise(SIGTERM)`) if the connection is closed by the
|
|
* remote peer.
|
|
*
|
|
* Note that #GDBusConnection objects returned by g_bus_get_finish()
|
|
* and g_bus_get_sync() will (usually) have this property set to %TRUE.
|
|
*
|
|
* 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: (nullable): a #GError with more details about the event or %NULL
|
|
*
|
|
* Emitted when the connection is closed.
|
|
*
|
|
* The cause of this event can be
|
|
*
|
|
* - If g_dbus_connection_close() is called. In this case
|
|
* @remote_peer_vanished is set to %FALSE and @error is %NULL.
|
|
*
|
|
* - If the remote peer closes the connection. In this case
|
|
* @remote_peer_vanished is set to %TRUE and @error is set.
|
|
*
|
|
* - If the remote peer sends invalid or malformed data. In this
|
|
* case @remote_peer_vanished is set to %FALSE and @error is set.
|
|
*
|
|
* 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 (I_("closed"),
|
|
G_TYPE_DBUS_CONNECTION,
|
|
G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET (GDBusConnectionClass, closed),
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
G_TYPE_NONE,
|
|
2,
|
|
G_TYPE_BOOLEAN,
|
|
G_TYPE_ERROR);
|
|
}
|
|
|
|
static void
|
|
g_dbus_connection_init (GDBusConnection *connection)
|
|
{
|
|
g_mutex_init (&connection->lock);
|
|
g_mutex_init (&connection->init_lock);
|
|
|
|
connection->map_method_serial_to_task = 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->map_thread_to_last_serial = g_hash_table_new (g_direct_hash,
|
|
g_direct_equal);
|
|
|
|
connection->main_context_at_construction = g_main_context_ref_thread_default ();
|
|
|
|
connection->filters = g_ptr_array_new ();
|
|
}
|
|
|
|
/**
|
|
* g_dbus_connection_get_stream:
|
|
* @connection: a #GDBusConnection
|
|
*
|
|
* Gets the underlying stream used for IO.
|
|
*
|
|
* While the #GDBusConnection is active, it will interact with this
|
|
* stream from a worker thread, so it is not safe to interact with
|
|
* the stream directly.
|
|
*
|
|
* 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);
|
|
|
|
/* do not use g_return_val_if_fail(), we want the memory barrier */
|
|
if (!check_initialized (connection))
|
|
return 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
|
|
*/
|
|
void
|
|
g_dbus_connection_start_message_processing (GDBusConnection *connection)
|
|
{
|
|
g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
|
|
|
|
/* do not use g_return_val_if_fail(), we want the memory barrier */
|
|
if (!check_initialized (connection))
|
|
return;
|
|
|
|
g_assert (connection->worker != NULL);
|
|
_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
|
|
*/
|
|
gboolean
|
|
g_dbus_connection_is_closed (GDBusConnection *connection)
|
|
{
|
|
gint flags;
|
|
|
|
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
|
|
|
|
flags = g_atomic_int_get (&connection->atomic_flags);
|
|
|
|
return (flags & FLAG_CLOSED) ? TRUE : FALSE;
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
GDBusCapabilityFlags
|
|
g_dbus_connection_get_capabilities (GDBusConnection *connection)
|
|
{
|
|
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), G_DBUS_CAPABILITY_FLAGS_NONE);
|
|
|
|
/* do not use g_return_val_if_fail(), we want the memory barrier */
|
|
if (!check_initialized (connection))
|
|
return G_DBUS_CAPABILITY_FLAGS_NONE;
|
|
|
|
return connection->capabilities;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* Called in a temporary thread without holding locks. */
|
|
static void
|
|
flush_in_thread_func (GTask *task,
|
|
gpointer source_object,
|
|
gpointer task_data,
|
|
GCancellable *cancellable)
|
|
{
|
|
GError *error = NULL;
|
|
|
|
if (g_dbus_connection_flush_sync (source_object,
|
|
cancellable,
|
|
&error))
|
|
g_task_return_boolean (task, TRUE);
|
|
else
|
|
g_task_return_error (task, error);
|
|
}
|
|
|
|
/**
|
|
* g_dbus_connection_flush:
|
|
* @connection: a #GDBusConnection
|
|
* @cancellable: (nullable): a #GCancellable or %NULL
|
|
* @callback: (nullable): 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 guaranteed 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
|
|
* [thread-default main context][g-main-context-push-thread-default]
|
|
* 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
|
|
*/
|
|
void
|
|
g_dbus_connection_flush (GDBusConnection *connection,
|
|
GCancellable *cancellable,
|
|
GAsyncReadyCallback callback,
|
|
gpointer user_data)
|
|
{
|
|
GTask *task;
|
|
|
|
g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
|
|
|
|
task = g_task_new (connection, cancellable, callback, user_data);
|
|
g_task_set_source_tag (task, g_dbus_connection_flush);
|
|
g_task_run_in_thread (task, flush_in_thread_func);
|
|
g_object_unref (task);
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
gboolean
|
|
g_dbus_connection_flush_finish (GDBusConnection *connection,
|
|
GAsyncResult *res,
|
|
GError **error)
|
|
{
|
|
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
|
|
g_return_val_if_fail (g_task_is_valid (res, connection), FALSE);
|
|
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
|
|
|
return g_task_propagate_boolean (G_TASK (res), error);
|
|
}
|
|
|
|
/**
|
|
* g_dbus_connection_flush_sync:
|
|
* @connection: a #GDBusConnection
|
|
* @cancellable: (nullable): 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
|
|
*/
|
|
gboolean
|
|
g_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;
|
|
|
|
/* This is only a best-effort attempt to see whether the connection is
|
|
* closed, so it doesn't need the lock. If the connection closes just
|
|
* after this check, but before scheduling the flush operation, the
|
|
* result will be more or less the same as if the connection closed while
|
|
* the flush operation was pending - it'll fail with either CLOSED or
|
|
* CANCELLED.
|
|
*/
|
|
if (!check_unclosed (connection, 0, error))
|
|
goto out;
|
|
|
|
g_assert (connection->worker != NULL);
|
|
|
|
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 void
|
|
emit_closed_data_free (EmitClosedData *data)
|
|
{
|
|
g_object_unref (data->connection);
|
|
if (data->error != NULL)
|
|
g_error_free (data->error);
|
|
g_free (data);
|
|
}
|
|
|
|
/* Called in a user thread that has acquired the main context that was
|
|
* thread-default when the object was constructed
|
|
*/
|
|
static gboolean
|
|
emit_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.
|
|
* FLAG_CLOSED must already have been set.
|
|
*/
|
|
static void
|
|
schedule_closed_unlocked (GDBusConnection *connection,
|
|
gboolean remote_peer_vanished,
|
|
GError *error)
|
|
{
|
|
GSource *idle_source;
|
|
EmitClosedData *data;
|
|
|
|
CONNECTION_ENSURE_LOCK (connection);
|
|
|
|
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_set_name (idle_source, "[gio] emit_closed_in_idle");
|
|
g_source_attach (idle_source, connection->main_context_at_construction);
|
|
g_source_unref (idle_source);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/**
|
|
* g_dbus_connection_close:
|
|
* @connection: a #GDBusConnection
|
|
* @cancellable: (nullable): a #GCancellable or %NULL
|
|
* @callback: (nullable): 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
|
|
* [thread-default main context][g-main-context-push-thread-default]
|
|
* of the thread that @connection was constructed in.
|
|
*
|
|
* This is an asynchronous method. When the operation is finished,
|
|
* @callback will be invoked in the
|
|
* [thread-default main context][g-main-context-push-thread-default]
|
|
* 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
|
|
*/
|
|
void
|
|
g_dbus_connection_close (GDBusConnection *connection,
|
|
GCancellable *cancellable,
|
|
GAsyncReadyCallback callback,
|
|
gpointer user_data)
|
|
{
|
|
GTask *task;
|
|
|
|
g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
|
|
|
|
/* do not use g_return_val_if_fail(), we want the memory barrier */
|
|
if (!check_initialized (connection))
|
|
return;
|
|
|
|
g_assert (connection->worker != NULL);
|
|
|
|
task = g_task_new (connection, cancellable, callback, user_data);
|
|
g_task_set_source_tag (task, g_dbus_connection_close);
|
|
_g_dbus_worker_close (connection->worker, task);
|
|
g_object_unref (task);
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
gboolean
|
|
g_dbus_connection_close_finish (GDBusConnection *connection,
|
|
GAsyncResult *res,
|
|
GError **error)
|
|
{
|
|
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
|
|
g_return_val_if_fail (g_task_is_valid (res, connection), FALSE);
|
|
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
|
|
|
return g_task_propagate_boolean (G_TASK (res), error);
|
|
}
|
|
|
|
typedef struct {
|
|
GMainLoop *loop;
|
|
GAsyncResult *result;
|
|
} SyncCloseData;
|
|
|
|
/* Can be called by any thread, without the connection lock */
|
|
static void
|
|
sync_close_cb (GObject *source_object,
|
|
GAsyncResult *res,
|
|
gpointer user_data)
|
|
{
|
|
SyncCloseData *data = user_data;
|
|
|
|
data->result = g_object_ref (res);
|
|
g_main_loop_quit (data->loop);
|
|
}
|
|
|
|
/**
|
|
* g_dbus_connection_close_sync:
|
|
* @connection: a #GDBusConnection
|
|
* @cancellable: (nullable): 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
|
|
*/
|
|
gboolean
|
|
g_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;
|
|
|
|
if (check_unclosed (connection, 0, error))
|
|
{
|
|
GMainContext *context;
|
|
SyncCloseData data;
|
|
|
|
context = g_main_context_new ();
|
|
g_main_context_push_thread_default (context);
|
|
data.loop = g_main_loop_new (context, TRUE);
|
|
data.result = NULL;
|
|
|
|
g_dbus_connection_close (connection, cancellable, sync_close_cb, &data);
|
|
g_main_loop_run (data.loop);
|
|
ret = g_dbus_connection_close_finish (connection, data.result, error);
|
|
|
|
g_object_unref (data.result);
|
|
g_main_loop_unref (data.loop);
|
|
g_main_context_pop_thread_default (context);
|
|
g_main_context_unref (context);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/**
|
|
* g_dbus_connection_get_last_serial:
|
|
* @connection: a #GDBusConnection
|
|
*
|
|
* Retrieves the last serial number assigned to a #GDBusMessage on
|
|
* the current thread. This includes messages sent via both low-level
|
|
* API such as g_dbus_connection_send_message() as well as
|
|
* high-level API such as g_dbus_connection_emit_signal(),
|
|
* g_dbus_connection_call() or g_dbus_proxy_call().
|
|
*
|
|
* Returns: the last used serial or zero when no message has been sent
|
|
* within the current thread
|
|
*
|
|
* Since: 2.34
|
|
*/
|
|
guint32
|
|
g_dbus_connection_get_last_serial (GDBusConnection *connection)
|
|
{
|
|
guint32 ret;
|
|
|
|
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
|
|
|
|
CONNECTION_LOCK (connection);
|
|
ret = GPOINTER_TO_UINT (g_hash_table_lookup (connection->map_thread_to_last_serial,
|
|
g_thread_self ()));
|
|
CONNECTION_UNLOCK (connection);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* Can be called by any thread, with the connection lock held */
|
|
static gboolean
|
|
g_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 we're in initable_init(), don't check for being initialized, to avoid
|
|
* chicken-and-egg problems. initable_init() is responsible for setting up
|
|
* our prerequisites (mainly connection->worker), and only calling us
|
|
* from its own thread (so no memory barrier is needed).
|
|
*/
|
|
if (!check_unclosed (connection,
|
|
(flags & SEND_MESSAGE_FLAGS_INITIALIZING) ? MAY_BE_UNINITIALIZED : 0,
|
|
error))
|
|
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;
|
|
|
|
/* store used serial for the current thread */
|
|
/* TODO: watch the thread disposal and remove associated record
|
|
* from hashtable
|
|
* - see https://bugzilla.gnome.org/show_bug.cgi?id=676825#c7
|
|
*/
|
|
g_hash_table_replace (connection->map_thread_to_last_serial,
|
|
g_thread_self (),
|
|
GUINT_TO_POINTER (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: (out) (optional): 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 this [server][gdbus-server] and [client][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
|
|
*/
|
|
gboolean
|
|
g_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
|
|
{
|
|
guint32 serial;
|
|
|
|
gulong cancellable_handler_id;
|
|
|
|
GSource *timeout_source;
|
|
|
|
gboolean delivered;
|
|
} SendMessageData;
|
|
|
|
/* Can be called from any thread with or without lock held */
|
|
static void
|
|
send_message_data_free (SendMessageData *data)
|
|
{
|
|
g_assert (data->timeout_source == NULL);
|
|
g_assert (data->cancellable_handler_id == 0);
|
|
|
|
g_slice_free (SendMessageData, data);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* can be called from any thread with lock held */
|
|
static void
|
|
send_message_with_reply_cleanup (GTask *task, gboolean remove)
|
|
{
|
|
GDBusConnection *connection = g_task_get_source_object (task);
|
|
SendMessageData *data = g_task_get_task_data (task);
|
|
|
|
CONNECTION_ENSURE_LOCK (connection);
|
|
|
|
g_assert (!data->delivered);
|
|
|
|
data->delivered = TRUE;
|
|
|
|
if (data->timeout_source != NULL)
|
|
{
|
|
g_source_destroy (data->timeout_source);
|
|
data->timeout_source = NULL;
|
|
}
|
|
if (data->cancellable_handler_id > 0)
|
|
{
|
|
g_cancellable_disconnect (g_task_get_cancellable (task), data->cancellable_handler_id);
|
|
data->cancellable_handler_id = 0;
|
|
}
|
|
|
|
if (remove)
|
|
{
|
|
gboolean removed = g_hash_table_remove (connection->map_method_serial_to_task,
|
|
GUINT_TO_POINTER (data->serial));
|
|
g_warn_if_fail (removed);
|
|
}
|
|
|
|
g_object_unref (task);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* Called from GDBus worker thread with lock held */
|
|
static void
|
|
send_message_data_deliver_reply_unlocked (GTask *task,
|
|
GDBusMessage *reply)
|
|
{
|
|
SendMessageData *data = g_task_get_task_data (task);
|
|
|
|
if (data->delivered)
|
|
goto out;
|
|
|
|
g_task_return_pointer (task, g_object_ref (reply), g_object_unref);
|
|
|
|
send_message_with_reply_cleanup (task, TRUE);
|
|
|
|
out:
|
|
;
|
|
}
|
|
|
|
/* Called from a user thread, lock is not held */
|
|
static void
|
|
send_message_data_deliver_error (GTask *task,
|
|
GQuark domain,
|
|
gint code,
|
|
const char *message)
|
|
{
|
|
GDBusConnection *connection = g_task_get_source_object (task);
|
|
SendMessageData *data = g_task_get_task_data (task);
|
|
|
|
CONNECTION_LOCK (connection);
|
|
if (data->delivered)
|
|
{
|
|
CONNECTION_UNLOCK (connection);
|
|
return;
|
|
}
|
|
|
|
g_object_ref (task);
|
|
send_message_with_reply_cleanup (task, TRUE);
|
|
CONNECTION_UNLOCK (connection);
|
|
|
|
g_task_return_new_error (task, domain, code, "%s", message);
|
|
g_object_unref (task);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* Called from a user thread, lock is not held */
|
|
static gboolean
|
|
send_message_with_reply_cancelled_idle_cb (gpointer user_data)
|
|
{
|
|
GTask *task = user_data;
|
|
|
|
send_message_data_deliver_error (task, G_IO_ERROR, G_IO_ERROR_CANCELLED,
|
|
_("Operation was cancelled"));
|
|
return FALSE;
|
|
}
|
|
|
|
/* Can be called from any thread with or without lock held */
|
|
static void
|
|
send_message_with_reply_cancelled_cb (GCancellable *cancellable,
|
|
gpointer user_data)
|
|
{
|
|
GTask *task = 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_name (idle_source, "[gio] send_message_with_reply_cancelled_idle_cb");
|
|
g_task_attach_source (task, idle_source, send_message_with_reply_cancelled_idle_cb);
|
|
g_source_unref (idle_source);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* Called from a user thread, lock is not held */
|
|
static gboolean
|
|
send_message_with_reply_timeout_cb (gpointer user_data)
|
|
{
|
|
GTask *task = user_data;
|
|
|
|
send_message_data_deliver_error (task, G_IO_ERROR, G_IO_ERROR_TIMED_OUT,
|
|
_("Timeout was reached"));
|
|
return FALSE;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* Called from a user thread, connection's lock is held */
|
|
static void
|
|
g_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)
|
|
{
|
|
GTask *task;
|
|
SendMessageData *data;
|
|
GError *error = NULL;
|
|
volatile guint32 serial;
|
|
|
|
if (out_serial == NULL)
|
|
out_serial = &serial;
|
|
|
|
if (timeout_msec == -1)
|
|
timeout_msec = 25 * 1000;
|
|
|
|
data = g_slice_new0 (SendMessageData);
|
|
task = g_task_new (connection, cancellable, callback, user_data);
|
|
g_task_set_source_tag (task,
|
|
g_dbus_connection_send_message_with_reply_unlocked);
|
|
g_task_set_task_data (task, data, (GDestroyNotify) send_message_data_free);
|
|
|
|
if (g_task_return_error_if_cancelled (task))
|
|
{
|
|
g_object_unref (task);
|
|
return;
|
|
}
|
|
|
|
if (!g_dbus_connection_send_message_unlocked (connection, message, flags, out_serial, &error))
|
|
{
|
|
g_task_return_error (task, error);
|
|
g_object_unref (task);
|
|
return;
|
|
}
|
|
data->serial = *out_serial;
|
|
|
|
if (cancellable != NULL)
|
|
{
|
|
data->cancellable_handler_id = g_cancellable_connect (cancellable,
|
|
G_CALLBACK (send_message_with_reply_cancelled_cb),
|
|
g_object_ref (task),
|
|
g_object_unref);
|
|
}
|
|
|
|
if (timeout_msec != G_MAXINT)
|
|
{
|
|
data->timeout_source = g_timeout_source_new (timeout_msec);
|
|
g_task_attach_source (task, data->timeout_source,
|
|
(GSourceFunc) send_message_with_reply_timeout_cb);
|
|
g_source_unref (data->timeout_source);
|
|
}
|
|
|
|
g_hash_table_insert (connection->map_method_serial_to_task,
|
|
GUINT_TO_POINTER (*out_serial),
|
|
task);
|
|
}
|
|
|
|
/**
|
|
* 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: (out) (optional): return location for serial number assigned
|
|
* to @message when sending it or %NULL
|
|
* @cancellable: (nullable): a #GCancellable or %NULL
|
|
* @callback: (nullable): 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
|
|
* [thread-default main context][g-main-context-push-thread-default]
|
|
* 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 this [server][gdbus-server] and [client][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
|
|
*/
|
|
void
|
|
g_dbus_connection_send_message_with_reply (GDBusConnection *connection,
|
|
GDBusMessage *message,
|
|
GDBusSendMessageFlags flags,
|
|
gint timeout_msec,
|
|
volatile guint32 *out_serial,
|
|
GCancellable *cancellable,
|
|
GAsyncReadyCallback callback,
|
|
gpointer user_data)
|
|
{
|
|
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: teturn 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
|
|
* occurred. 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 this [server][gdbus-server] and [client][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)
|
|
{
|
|
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
|
|
g_return_val_if_fail (g_task_is_valid (res, connection), NULL);
|
|
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
|
|
|
|
return g_task_propagate_pointer (G_TASK (res), error);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
typedef struct
|
|
{
|
|
GAsyncResult *res;
|
|
GMainContext *context;
|
|
GMainLoop *loop;
|
|
} SendMessageSyncData;
|
|
|
|
/* Called from a user thread, lock is not held */
|
|
static void
|
|
send_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: (out) (optional): return location for serial number
|
|
* assigned to @message when sending it or %NULL
|
|
* @cancellable: (nullable): 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
|
|
* occurred. 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 this [server][gdbus-server] and [client][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), NULL);
|
|
g_return_val_if_fail (timeout_msec >= 0 || timeout_msec == -1, NULL);
|
|
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
|
|
|
|
data.res = NULL;
|
|
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);
|
|
if (data.res)
|
|
g_object_unref (data.res);
|
|
|
|
return reply;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
typedef struct
|
|
{
|
|
guint id;
|
|
guint ref_count;
|
|
GDBusMessageFilterFunction filter_function;
|
|
gpointer user_data;
|
|
GDestroyNotify user_data_free_func;
|
|
GMainContext *context;
|
|
} FilterData;
|
|
|
|
/* requires CONNECTION_LOCK */
|
|
static FilterData **
|
|
copy_filter_list (GPtrArray *filters)
|
|
{
|
|
FilterData **copy;
|
|
guint n;
|
|
|
|
copy = g_new (FilterData *, filters->len + 1);
|
|
for (n = 0; n < filters->len; n++)
|
|
{
|
|
copy[n] = filters->pdata[n];
|
|
copy[n]->ref_count++;
|
|
}
|
|
copy[n] = NULL;
|
|
|
|
return copy;
|
|
}
|
|
|
|
/* requires CONNECTION_LOCK */
|
|
static void
|
|
free_filter_list (FilterData **filters)
|
|
{
|
|
guint n;
|
|
|
|
for (n = 0; filters[n]; n++)
|
|
{
|
|
filters[n]->ref_count--;
|
|
if (filters[n]->ref_count == 0)
|
|
{
|
|
call_destroy_notify (filters[n]->context,
|
|
filters[n]->user_data_free_func,
|
|
filters[n]->user_data);
|
|
g_main_context_unref (filters[n]->context);
|
|
g_free (filters[n]);
|
|
}
|
|
}
|
|
g_free (filters);
|
|
}
|
|
|
|
/* Called in GDBusWorker's thread - we must not block - with no lock held */
|
|
static void
|
|
on_worker_message_received (GDBusWorker *worker,
|
|
GDBusMessage *message,
|
|
gpointer user_data)
|
|
{
|
|
GDBusConnection *connection;
|
|
FilterData **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);
|
|
filters = copy_filter_list (connection->filters);
|
|
CONNECTION_UNLOCK (connection);
|
|
|
|
/* then call the filters in order (without holding the lock) */
|
|
for (n = 0; filters[n]; n++)
|
|
{
|
|
message = filters[n]->filter_function (connection,
|
|
message,
|
|
TRUE,
|
|
filters[n]->user_data);
|
|
if (message == NULL)
|
|
break;
|
|
g_dbus_message_lock (message);
|
|
}
|
|
|
|
CONNECTION_LOCK (connection);
|
|
free_filter_list (filters);
|
|
CONNECTION_UNLOCK (connection);
|
|
|
|
/* 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;
|
|
GTask *task;
|
|
|
|
reply_serial = g_dbus_message_get_reply_serial (message);
|
|
CONNECTION_LOCK (connection);
|
|
task = g_hash_table_lookup (connection->map_method_serial_to_task,
|
|
GUINT_TO_POINTER (reply_serial));
|
|
if (task != NULL)
|
|
{
|
|
//g_debug ("delivering reply/error for serial %d for %p", reply_serial, connection);
|
|
send_message_data_deliver_reply_unlocked (task, 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);
|
|
}
|
|
|
|
/* Called in GDBusWorker's thread, lock is not held */
|
|
static GDBusMessage *
|
|
on_worker_message_about_to_be_sent (GDBusWorker *worker,
|
|
GDBusMessage *message,
|
|
gpointer user_data)
|
|
{
|
|
GDBusConnection *connection;
|
|
FilterData **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);
|
|
filters = copy_filter_list (connection->filters);
|
|
CONNECTION_UNLOCK (connection);
|
|
|
|
/* then call the filters in order (without holding the lock) */
|
|
for (n = 0; filters[n]; n++)
|
|
{
|
|
g_dbus_message_lock (message);
|
|
message = filters[n]->filter_function (connection,
|
|
message,
|
|
FALSE,
|
|
filters[n]->user_data);
|
|
if (message == NULL)
|
|
break;
|
|
}
|
|
|
|
CONNECTION_LOCK (connection);
|
|
free_filter_list (filters);
|
|
CONNECTION_UNLOCK (connection);
|
|
|
|
g_object_unref (connection);
|
|
|
|
return message;
|
|
}
|
|
|
|
/* called with connection lock held, in GDBusWorker thread */
|
|
static gboolean
|
|
cancel_method_on_close (gpointer key, gpointer value, gpointer user_data)
|
|
{
|
|
GTask *task = value;
|
|
SendMessageData *data = g_task_get_task_data (task);
|
|
|
|
if (data->delivered)
|
|
return FALSE;
|
|
|
|
g_task_return_new_error (task,
|
|
G_IO_ERROR,
|
|
G_IO_ERROR_CLOSED,
|
|
_("The connection is closed"));
|
|
|
|
/* Ask send_message_with_reply_cleanup not to remove the element from the
|
|
* hash table - we're in the middle of a foreach; that would be unsafe.
|
|
* Instead, return TRUE from this function so that it gets removed safely.
|
|
*/
|
|
send_message_with_reply_cleanup (task, FALSE);
|
|
return TRUE;
|
|
}
|
|
|
|
/* Called in GDBusWorker's thread - we must not block - without lock held */
|
|
static void
|
|
on_worker_closed (GDBusWorker *worker,
|
|
gboolean remote_peer_vanished,
|
|
GError *error,
|
|
gpointer user_data)
|
|
{
|
|
GDBusConnection *connection;
|
|
gboolean alive;
|
|
guint old_atomic_flags;
|
|
|
|
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);
|
|
/* Even though this is atomic, we do it inside the lock to avoid breaking
|
|
* assumptions in remove_match_rule(). We'd need the lock in a moment
|
|
* anyway, so, no loss.
|
|
*/
|
|
old_atomic_flags = g_atomic_int_or (&connection->atomic_flags, FLAG_CLOSED);
|
|
|
|
if (!(old_atomic_flags & FLAG_CLOSED))
|
|
{
|
|
g_hash_table_foreach_remove (connection->map_method_serial_to_task, cancel_method_on_close, NULL);
|
|
schedule_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.
|
|
*
|
|
* Called with the init_lock held.
|
|
*/
|
|
static GDBusCapabilityFlags
|
|
get_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;
|
|
}
|
|
|
|
/* Called in a user thread, lock is not held */
|
|
static gboolean
|
|
initable_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;
|
|
|
|
/* Make this a no-op if we're already initialized (successfully or
|
|
* unsuccessfully)
|
|
*/
|
|
if ((g_atomic_int_get (&connection->atomic_flags) & FLAG_INITIALIZED))
|
|
{
|
|
ret = (connection->initialization_error == NULL);
|
|
goto out;
|
|
}
|
|
|
|
/* Because of init_lock, we can't get here twice in different threads */
|
|
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 (&connection->initialization_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,
|
|
connection->authentication_observer,
|
|
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
|
|
/* We want all IO operations to be non-blocking since they happen in
|
|
* the worker thread which is shared by _all_ connections.
|
|
*/
|
|
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) != 0),
|
|
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)"),
|
|
CALL_FLAGS_INITIALIZING,
|
|
-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);
|
|
}
|
|
|
|
ret = TRUE;
|
|
out:
|
|
if (!ret)
|
|
{
|
|
g_assert (connection->initialization_error != NULL);
|
|
g_propagate_error (error, g_error_copy (connection->initialization_error));
|
|
}
|
|
|
|
g_atomic_int_or (&connection->atomic_flags, FLAG_INITIALIZED);
|
|
g_mutex_unlock (&connection->init_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
initable_iface_init (GInitableIface *initable_iface)
|
|
{
|
|
initable_iface->init = initable_init;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
static void
|
|
async_initable_iface_init (GAsyncInitableIface *async_initable_iface)
|
|
{
|
|
/* Use default */
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/**
|
|
* g_dbus_connection_new:
|
|
* @stream: a #GIOStream
|
|
* @guid: (nullable): the GUID to use if a authenticating as a server or %NULL
|
|
* @flags: flags describing how to make the connection
|
|
* @observer: (nullable): a #GDBusAuthObserver or %NULL
|
|
* @cancellable: (nullable): 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 @stream is a #GSocketConnection, then the corresponding #GSocket
|
|
* will be put into non-blocking mode.
|
|
*
|
|
* The D-Bus connection will interact with @stream from a worker thread.
|
|
* As a result, the caller should not interact with @stream after this
|
|
* method has been called, except by calling g_object_unref() on it.
|
|
*
|
|
* 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
|
|
*/
|
|
void
|
|
g_dbus_connection_new (GIOStream *stream,
|
|
const gchar *guid,
|
|
GDBusConnectionFlags flags,
|
|
GDBusAuthObserver *observer,
|
|
GCancellable *cancellable,
|
|
GAsyncReadyCallback callback,
|
|
gpointer user_data)
|
|
{
|
|
_g_dbus_initialize ();
|
|
|
|
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: (nullable): the GUID to use if a authenticating as a server or %NULL
|
|
* @flags: flags describing how to make the connection
|
|
* @observer: (nullable): a #GDBusAuthObserver or %NULL
|
|
* @cancellable: (nullable): 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 @stream is a #GSocketConnection, then the corresponding #GSocket
|
|
* will be put into non-blocking mode.
|
|
*
|
|
* The D-Bus connection will interact with @stream from a worker thread.
|
|
* As a result, the caller should not interact with @stream after this
|
|
* method has been called, except by calling g_object_unref() on it.
|
|
*
|
|
* 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_dbus_initialize ();
|
|
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: (nullable): a #GDBusAuthObserver or %NULL
|
|
* @cancellable: (nullable): 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](https://dbus.freedesktop.org/doc/dbus-specification.html#addresses).
|
|
*
|
|
* 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
|
|
*/
|
|
void
|
|
g_dbus_connection_new_for_address (const gchar *address,
|
|
GDBusConnectionFlags flags,
|
|
GDBusAuthObserver *observer,
|
|
GCancellable *cancellable,
|
|
GAsyncReadyCallback callback,
|
|
gpointer user_data)
|
|
{
|
|
_g_dbus_initialize ();
|
|
|
|
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: (nullable): a #GDBusAuthObserver or %NULL
|
|
* @cancellable: (nullable): 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](https://dbus.freedesktop.org/doc/dbus-specification.html#addresses).
|
|
*
|
|
* 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_dbus_initialize ();
|
|
|
|
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.
|
|
*
|
|
* Note that this function should be used with care. Most modern UNIX
|
|
* desktops tie the notion of a user session the session bus, and expect
|
|
* all of a users applications to quit when their bus connection goes away.
|
|
* If you are setting @exit_on_close to %FALSE for the shared session
|
|
* bus connection, you should make sure that your application exits
|
|
* when the user session ends.
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
void
|
|
g_dbus_connection_set_exit_on_close (GDBusConnection *connection,
|
|
gboolean exit_on_close)
|
|
{
|
|
g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
|
|
|
|
if (exit_on_close)
|
|
g_atomic_int_or (&connection->atomic_flags, FLAG_EXIT_ON_CLOSE);
|
|
else
|
|
g_atomic_int_and (&connection->atomic_flags, ~FLAG_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
|
|
*/
|
|
gboolean
|
|
g_dbus_connection_get_exit_on_close (GDBusConnection *connection)
|
|
{
|
|
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
|
|
|
|
if (g_atomic_int_get (&connection->atomic_flags) & FLAG_EXIT_ON_CLOSE)
|
|
return TRUE;
|
|
else
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/* do not use g_return_val_if_fail(), we want the memory barrier */
|
|
if (!check_initialized (connection))
|
|
return 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) (nullable): 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);
|
|
|
|
/* do not use g_return_val_if_fail(), we want the memory barrier */
|
|
if (!check_initialized (connection))
|
|
return NULL;
|
|
|
|
return connection->credentials;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
static volatile 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.
|
|
*
|
|
* 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.
|
|
*
|
|
* If @user_data_free_func is non-%NULL, it will be called (in the
|
|
* thread-default main context of the thread you are calling this
|
|
* method from) at some point after @user_data is no longer
|
|
* needed. (It is not guaranteed to be called synchronously when the
|
|
* filter is removed, and may be called after @connection has been
|
|
* destroyed.)
|
|
*
|
|
* Returns: a filter identifier that can be used with
|
|
* g_dbus_connection_remove_filter()
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
guint
|
|
g_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);
|
|
g_return_val_if_fail (check_initialized (connection), 0);
|
|
|
|
CONNECTION_LOCK (connection);
|
|
data = g_new0 (FilterData, 1);
|
|
data->id = g_atomic_int_add (&_global_filter_id, 1); /* TODO: overflow etc. */
|
|
data->ref_count = 1;
|
|
data->filter_function = filter_function;
|
|
data->user_data = user_data;
|
|
data->user_data_free_func = user_data_free_func;
|
|
data->context = g_main_context_ref_thread_default ();
|
|
g_ptr_array_add (connection->filters, data);
|
|
CONNECTION_UNLOCK (connection);
|
|
|
|
return data->id;
|
|
}
|
|
|
|
/* only called from finalize(), removes all filters */
|
|
static void
|
|
purge_all_filters (GDBusConnection *connection)
|
|
{
|
|
guint n;
|
|
for (n = 0; n < connection->filters->len; n++)
|
|
{
|
|
FilterData *data = connection->filters->pdata[n];
|
|
|
|
call_destroy_notify (data->context,
|
|
data->user_data_free_func,
|
|
data->user_data);
|
|
g_main_context_unref (data->context);
|
|
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.
|
|
*
|
|
* Note that since filters run in a different thread, there is a race
|
|
* condition where it is possible that the filter will be running even
|
|
* after calling g_dbus_connection_remove_filter(), so you cannot just
|
|
* free data that the filter might be using. Instead, you should pass
|
|
* a #GDestroyNotify to g_dbus_connection_add_filter(), which will be
|
|
* called when it is guaranteed that the data is no longer needed.
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
void
|
|
g_dbus_connection_remove_filter (GDBusConnection *connection,
|
|
guint filter_id)
|
|
{
|
|
guint n;
|
|
gboolean found;
|
|
FilterData *to_destroy;
|
|
|
|
g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
|
|
g_return_if_fail (check_initialized (connection));
|
|
|
|
CONNECTION_LOCK (connection);
|
|
found = FALSE;
|
|
to_destroy = NULL;
|
|
for (n = 0; n < connection->filters->len; n++)
|
|
{
|
|
FilterData *data = connection->filters->pdata[n];
|
|
if (data->id == filter_id)
|
|
{
|
|
found = TRUE;
|
|
g_ptr_array_remove_index (connection->filters, n);
|
|
data->ref_count--;
|
|
if (data->ref_count == 0)
|
|
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_main_context_unref (to_destroy->context);
|
|
g_free (to_destroy);
|
|
}
|
|
else if (!found)
|
|
{
|
|
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;
|
|
GDBusSignalFlags flags;
|
|
GArray *subscribers;
|
|
} SignalData;
|
|
|
|
typedef struct
|
|
{
|
|
GDBusSignalCallback callback;
|
|
gpointer user_data;
|
|
GDestroyNotify user_data_free_func;
|
|
guint id;
|
|
GMainContext *context;
|
|
} SignalSubscriber;
|
|
|
|
static void
|
|
signal_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,
|
|
GDBusSignalFlags flags)
|
|
{
|
|
GString *rule;
|
|
|
|
rule = g_string_new ("type='signal'");
|
|
if (flags & G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE)
|
|
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)
|
|
{
|
|
if (flags & G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_PATH)
|
|
g_string_append_printf (rule, ",arg0path='%s'", arg0);
|
|
else if (flags & G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_NAMESPACE)
|
|
g_string_append_printf (rule, ",arg0namespace='%s'", arg0);
|
|
else
|
|
g_string_append_printf (rule, ",arg0='%s'", arg0);
|
|
}
|
|
|
|
return g_string_free (rule, FALSE);
|
|
}
|
|
|
|
static volatile guint _global_subscriber_id = 1;
|
|
static volatile guint _global_registration_id = 1;
|
|
static volatile guint _global_subtree_registration_id = 1;
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* Called in a user thread, lock is held */
|
|
static void
|
|
add_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);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* Called in a user thread, lock is held */
|
|
static void
|
|
remove_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))
|
|
{
|
|
/* If we could get G_IO_ERROR_CLOSED here, it wouldn't be reasonable to
|
|
* critical; but we're holding the lock, and our caller checked whether
|
|
* we were already closed, so we can't get that error.
|
|
*/
|
|
g_critical ("Error while sending RemoveMatch() message: %s", error->message);
|
|
g_error_free (error);
|
|
}
|
|
g_object_unref (message);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
static gboolean
|
|
is_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: (nullable): sender name to match on (unique or well-known name)
|
|
* or %NULL to listen from all senders
|
|
* @interface_name: (nullable): D-Bus interface name to match on or %NULL to
|
|
* match on all interfaces
|
|
* @member: (nullable): D-Bus signal name to match on or %NULL to match on
|
|
* all signals
|
|
* @object_path: (nullable): object path to match on or %NULL to match on
|
|
* all object paths
|
|
* @arg0: (nullable): contents of first string argument to match on or %NULL
|
|
* to match on all kinds of arguments
|
|
* @flags: #GDBusSignalFlags describing how arg0 is used in subscribing to the
|
|
* signal
|
|
* @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: (nullable): 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
|
|
* [thread-default main context][g-main-context-push-thread-default]
|
|
* 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.
|
|
*
|
|
* If one of %G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_NAMESPACE or
|
|
* %G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_PATH are given, @arg0 is
|
|
* interpreted as part of a namespace or path. The first argument
|
|
* of a signal is matched against that part as specified by D-Bus.
|
|
*
|
|
* If @user_data_free_func is non-%NULL, it will be called (in the
|
|
* thread-default main context of the thread you are calling this
|
|
* method from) at some point after @user_data is no longer
|
|
* needed. (It is not guaranteed to be called synchronously when the
|
|
* signal is unsubscribed from, and may be called after @connection
|
|
* has been destroyed.)
|
|
*
|
|
* Returns: a subscription identifier that can be used with g_dbus_connection_signal_unsubscribe()
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
guint
|
|
g_dbus_connection_signal_subscribe (GDBusConnection *connection,
|
|
const gchar *sender,
|
|
const gchar *interface_name,
|
|
const gchar *member,
|
|
const gchar *object_path,
|
|
const gchar *arg0,
|
|
GDBusSignalFlags flags,
|
|
GDBusSignalCallback callback,
|
|
gpointer user_data,
|
|
GDestroyNotify user_data_free_func)
|
|
{
|
|
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);
|
|
g_return_val_if_fail (check_initialized (connection), 0);
|
|
g_return_val_if_fail (!((flags & G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_PATH) && (flags & G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_NAMESPACE)), 0);
|
|
g_return_val_if_fail (!(arg0 == NULL && (flags & (G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_PATH | G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_NAMESPACE))), 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);
|
|
|
|
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 = g_atomic_int_add (&_global_subscriber_id, 1); /* TODO: overflow etc. */
|
|
subscriber.context = g_main_context_ref_thread_default ();
|
|
|
|
/* 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->flags = flags;
|
|
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;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* called in any thread */
|
|
/* must hold lock when calling this (except if connection->finalizing is TRUE) */
|
|
static void
|
|
unsubscribe_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) &&
|
|
!is_signal_data_for_name_lost_or_acquired (signal_data) &&
|
|
!g_dbus_connection_is_closed (connection) &&
|
|
!connection->finalizing)
|
|
{
|
|
/* The check for g_dbus_connection_is_closed() means that
|
|
* sending the RemoveMatch message can't fail with
|
|
* G_IO_ERROR_CLOSED, because we're holding the lock,
|
|
* so on_worker_closed() can't happen between the check we just
|
|
* did, and releasing the lock later.
|
|
*/
|
|
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
|
|
*/
|
|
void
|
|
g_dbus_connection_signal_unsubscribe (GDBusConnection *connection,
|
|
guint subscription_id)
|
|
{
|
|
GArray *subscribers;
|
|
guint n;
|
|
|
|
g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
|
|
g_return_if_fail (check_initialized (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);
|
|
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 gboolean
|
|
emit_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);
|
|
|
|
g_variant_unref (parameters);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
signal_instance_free (SignalInstance *signal_instance)
|
|
{
|
|
g_object_unref (signal_instance->message);
|
|
g_object_unref (signal_instance->connection);
|
|
g_free (signal_instance);
|
|
}
|
|
|
|
static gboolean
|
|
namespace_rule_matches (const gchar *namespace,
|
|
const gchar *name)
|
|
{
|
|
gint len_namespace;
|
|
gint len_name;
|
|
|
|
len_namespace = strlen (namespace);
|
|
len_name = strlen (name);
|
|
|
|
if (len_name < len_namespace)
|
|
return FALSE;
|
|
|
|
if (memcmp (namespace, name, len_namespace) != 0)
|
|
return FALSE;
|
|
|
|
return len_namespace == len_name || name[len_namespace] == '.';
|
|
}
|
|
|
|
static gboolean
|
|
path_rule_matches (const gchar *path_a,
|
|
const gchar *path_b)
|
|
{
|
|
gint len_a, len_b;
|
|
|
|
len_a = strlen (path_a);
|
|
len_b = strlen (path_b);
|
|
|
|
if (len_a < len_b && (len_a == 0 || path_a[len_a - 1] != '/'))
|
|
return FALSE;
|
|
|
|
if (len_b < len_a && (len_b == 0 || path_b[len_b - 1] != '/'))
|
|
return FALSE;
|
|
|
|
return memcmp (path_a, path_b, MIN (len_a, len_b)) == 0;
|
|
}
|
|
|
|
/* called in GDBusWorker thread WITH lock held */
|
|
static void
|
|
schedule_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)
|
|
{
|
|
if (arg0 == NULL)
|
|
continue;
|
|
|
|
if (signal_data->flags & G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_NAMESPACE)
|
|
{
|
|
if (!namespace_rule_matches (signal_data->arg0, arg0))
|
|
continue;
|
|
}
|
|
else if (signal_data->flags & G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_PATH)
|
|
{
|
|
if (!path_rule_matches (signal_data->arg0, arg0))
|
|
continue;
|
|
}
|
|
else if (!g_str_equal (signal_data->arg0, arg0))
|
|
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_set_name (idle_source, "[gio] emit_signal_instance_in_idle_cb");
|
|
g_source_attach (idle_source, subscriber->context);
|
|
g_source_unref (idle_source);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* called in GDBusWorker thread with lock held */
|
|
static void
|
|
distribute_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 void
|
|
purge_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);
|
|
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 void
|
|
exported_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 void
|
|
exported_interface_free (ExportedInterface *ei)
|
|
{
|
|
g_dbus_interface_info_cache_release (ei->interface_info);
|
|
g_dbus_interface_info_unref ((GDBusInterfaceInfo *) ei->interface_info);
|
|
|
|
call_destroy_notify (ei->context,
|
|
ei->user_data_free_func,
|
|
ei->user_data);
|
|
|
|
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.
|
|
*
|
|
* May be called by any thread. Caller must *not* hold lock.
|
|
*/
|
|
static gboolean
|
|
has_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 void
|
|
property_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 gboolean
|
|
invoke_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);
|
|
|
|
g_variant_take_ref (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 gboolean
|
|
invoke_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);
|
|
|
|
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);
|
|
}
|
|
|
|
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 in any thread with connection's lock held */
|
|
static gboolean
|
|
validate_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 (vtable == 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;
|
|
}
|
|
|
|
if (!is_get)
|
|
{
|
|
GVariant *value;
|
|
|
|
/* Fail with org.freedesktop.DBus.Error.InvalidArgs if the type
|
|
* of the given value is wrong
|
|
*/
|
|
g_variant_get_child (g_dbus_message_get_body (message), 2, "v", &value);
|
|
if (g_strcmp0 (g_variant_get_type_string (value), property_info->signature) != 0)
|
|
{
|
|
reply = g_dbus_message_new_method_error (message,
|
|
"org.freedesktop.DBus.Error.InvalidArgs",
|
|
_("Error setting property '%s': Expected type '%s' but got '%s'"),
|
|
property_name, property_info->signature,
|
|
g_variant_get_type_string (value));
|
|
g_dbus_connection_send_message_unlocked (connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
|
|
g_variant_unref (value);
|
|
g_object_unref (reply);
|
|
handled = TRUE;
|
|
goto out;
|
|
}
|
|
|
|
g_variant_unref (value);
|
|
}
|
|
|
|
/* If the vtable pointer for get_property() resp. set_property() is
|
|
* NULL then dispatch the call via the method_call() handler.
|
|
*/
|
|
if (is_get)
|
|
{
|
|
if (vtable->get_property == NULL)
|
|
{
|
|
schedule_method_call (connection, message, registration_id, subtree_registration_id,
|
|
interface_info, NULL, property_info, g_dbus_message_get_body (message),
|
|
vtable, main_context, user_data);
|
|
handled = TRUE;
|
|
goto out;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (vtable->set_property == NULL)
|
|
{
|
|
schedule_method_call (connection, message, registration_id, subtree_registration_id,
|
|
interface_info, NULL, property_info, g_dbus_message_get_body (message),
|
|
vtable, main_context, user_data);
|
|
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);
|
|
if (is_get)
|
|
g_source_set_name (idle_source, "[gio] invoke_get_property_in_idle_cb");
|
|
else
|
|
g_source_set_name (idle_source, "[gio] invoke_set_property_in_idle_cb");
|
|
g_source_attach (idle_source, main_context);
|
|
g_source_unref (idle_source);
|
|
|
|
handled = TRUE;
|
|
|
|
out:
|
|
return handled;
|
|
}
|
|
|
|
/* called in GDBusWorker thread with connection's lock held */
|
|
static gboolean
|
|
handle_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 void
|
|
property_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 gboolean
|
|
invoke_get_all_properties_in_idle_cb (gpointer _data)
|
|
{
|
|
PropertyGetAllData *data = _data;
|
|
GVariantBuilder builder;
|
|
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;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
g_variant_take_ref (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;
|
|
}
|
|
|
|
static gboolean
|
|
interface_has_readable_properties (GDBusInterfaceInfo *interface_info)
|
|
{
|
|
gint i;
|
|
|
|
if (!interface_info->properties)
|
|
return FALSE;
|
|
|
|
for (i = 0; interface_info->properties[i]; i++)
|
|
if (interface_info->properties[i]->flags & G_DBUS_PROPERTY_INFO_FLAGS_READABLE)
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* called in any thread with connection's lock held */
|
|
static gboolean
|
|
validate_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;
|
|
GSource *idle_source;
|
|
PropertyGetAllData *property_get_all_data;
|
|
|
|
handled = FALSE;
|
|
|
|
if (vtable == NULL)
|
|
goto out;
|
|
|
|
/* If the vtable pointer for get_property() is NULL but we have a
|
|
* non-zero number of readable properties, then dispatch the call via
|
|
* the method_call() handler.
|
|
*/
|
|
if (vtable->get_property == NULL && interface_has_readable_properties (interface_info))
|
|
{
|
|
schedule_method_call (connection, message, registration_id, subtree_registration_id,
|
|
interface_info, NULL, NULL, g_dbus_message_get_body (message),
|
|
vtable, main_context, user_data);
|
|
handled = TRUE;
|
|
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_set_name (idle_source, "[gio] invoke_get_all_properties_in_idle_cb");
|
|
g_source_attach (idle_source, main_context);
|
|
g_source_unref (idle_source);
|
|
|
|
handled = TRUE;
|
|
|
|
out:
|
|
return handled;
|
|
}
|
|
|
|
/* called in GDBusWorker thread with connection's lock held */
|
|
static gboolean
|
|
handle_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 '%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_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 void
|
|
introspect_append_header (GString *s)
|
|
{
|
|
g_string_append (s, introspect_header);
|
|
}
|
|
|
|
static void
|
|
maybe_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 */
|
|
/* called in any thread with connection's lock held */
|
|
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;
|
|
}
|
|
|
|
/* called in any thread with connection's lock not held */
|
|
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 GDBusWorker thread with connection's lock held */
|
|
static gboolean
|
|
handle_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 gboolean
|
|
call_in_idle_cb (gpointer user_data)
|
|
{
|
|
GDBusMethodInvocation *invocation = G_DBUS_METHOD_INVOCATION (user_data);
|
|
GDBusInterfaceVTable *vtable;
|
|
guint registration_id;
|
|
guint subtree_registration_id;
|
|
|
|
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 = g_object_get_data (G_OBJECT (invocation), "g-dbus-interface-vtable");
|
|
g_assert (vtable != NULL && vtable->method_call != NULL);
|
|
|
|
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 GDBusWorker thread with connection's lock held */
|
|
static void
|
|
schedule_method_call (GDBusConnection *connection,
|
|
GDBusMessage *message,
|
|
guint registration_id,
|
|
guint subtree_registration_id,
|
|
const GDBusInterfaceInfo *interface_info,
|
|
const GDBusMethodInfo *method_info,
|
|
const GDBusPropertyInfo *property_info,
|
|
GVariant *parameters,
|
|
const GDBusInterfaceVTable *vtable,
|
|
GMainContext *main_context,
|
|
gpointer user_data)
|
|
{
|
|
GDBusMethodInvocation *invocation;
|
|
GSource *idle_source;
|
|
|
|
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,
|
|
property_info,
|
|
connection,
|
|
message,
|
|
parameters,
|
|
user_data);
|
|
|
|
/* 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_set_name (idle_source, "[gio] call_in_idle_cb");
|
|
g_source_attach (idle_source, main_context);
|
|
g_source_unref (idle_source);
|
|
}
|
|
|
|
/* called in GDBusWorker thread with connection's lock held */
|
|
static gboolean
|
|
validate_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)
|
|
{
|
|
GDBusMethodInfo *method_info;
|
|
GDBusMessage *reply;
|
|
GVariant *parameters;
|
|
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 */
|
|
schedule_method_call (connection, message, registration_id, subtree_registration_id,
|
|
interface_info, method_info, NULL, parameters,
|
|
vtable, main_context, user_data);
|
|
g_variant_unref (parameters);
|
|
handled = TRUE;
|
|
|
|
out:
|
|
return handled;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* called in GDBusWorker thread with connection's lock held */
|
|
static gboolean
|
|
obj_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;
|
|
|
|
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: (nullable): a #GDBusInterfaceVTable to call into or %NULL
|
|
* @user_data: (nullable): 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
|
|
* [thread-default main context][g-main-context-push-thread-default]
|
|
* 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 `org.freedesktop.DBus.Error.InvalidArgs`
|
|
* is returned to the remote caller.
|
|
*
|
|
* Additionally, if the remote caller attempts to invoke methods or
|
|
* access properties not mentioned in @interface_info the
|
|
* `org.freedesktop.DBus.Error.UnknownMethod` resp.
|
|
* `org.freedesktop.DBus.Error.InvalidArgs` 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 can 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 this [server][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
|
|
*/
|
|
guint
|
|
g_dbus_connection_register_object (GDBusConnection *connection,
|
|
const gchar *object_path,
|
|
GDBusInterfaceInfo *interface_info,
|
|
const GDBusInterfaceVTable *vtable,
|
|
gpointer user_data,
|
|
GDestroyNotify user_data_free_func,
|
|
GError **error)
|
|
{
|
|
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);
|
|
g_return_val_if_fail (check_initialized (connection), 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 = g_atomic_int_add (&_global_registration_id, 1); /* 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);
|
|
g_dbus_interface_info_cache_build (ei->interface_info);
|
|
ei->interface_name = g_strdup (interface_info->name);
|
|
ei->context = g_main_context_ref_thread_default ();
|
|
|
|
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
|
|
*/
|
|
gboolean
|
|
g_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);
|
|
g_return_val_if_fail (check_initialized (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;
|
|
}
|
|
|
|
typedef struct {
|
|
GClosure *method_call_closure;
|
|
GClosure *get_property_closure;
|
|
GClosure *set_property_closure;
|
|
} RegisterObjectData;
|
|
|
|
static RegisterObjectData *
|
|
register_object_data_new (GClosure *method_call_closure,
|
|
GClosure *get_property_closure,
|
|
GClosure *set_property_closure)
|
|
{
|
|
RegisterObjectData *data;
|
|
|
|
data = g_new0 (RegisterObjectData, 1);
|
|
|
|
if (method_call_closure != NULL)
|
|
{
|
|
data->method_call_closure = g_closure_ref (method_call_closure);
|
|
g_closure_sink (method_call_closure);
|
|
if (G_CLOSURE_NEEDS_MARSHAL (method_call_closure))
|
|
g_closure_set_marshal (method_call_closure, g_cclosure_marshal_generic);
|
|
}
|
|
|
|
if (get_property_closure != NULL)
|
|
{
|
|
data->get_property_closure = g_closure_ref (get_property_closure);
|
|
g_closure_sink (get_property_closure);
|
|
if (G_CLOSURE_NEEDS_MARSHAL (get_property_closure))
|
|
g_closure_set_marshal (get_property_closure, g_cclosure_marshal_generic);
|
|
}
|
|
|
|
if (set_property_closure != NULL)
|
|
{
|
|
data->set_property_closure = g_closure_ref (set_property_closure);
|
|
g_closure_sink (set_property_closure);
|
|
if (G_CLOSURE_NEEDS_MARSHAL (set_property_closure))
|
|
g_closure_set_marshal (set_property_closure, g_cclosure_marshal_generic);
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
static void
|
|
register_object_free_func (gpointer user_data)
|
|
{
|
|
RegisterObjectData *data = user_data;
|
|
|
|
g_clear_pointer (&data->method_call_closure, g_closure_unref);
|
|
g_clear_pointer (&data->get_property_closure, g_closure_unref);
|
|
g_clear_pointer (&data->set_property_closure, g_closure_unref);
|
|
|
|
g_free (data);
|
|
}
|
|
|
|
static void
|
|
register_with_closures_on_method_call (GDBusConnection *connection,
|
|
const gchar *sender,
|
|
const gchar *object_path,
|
|
const gchar *interface_name,
|
|
const gchar *method_name,
|
|
GVariant *parameters,
|
|
GDBusMethodInvocation *invocation,
|
|
gpointer user_data)
|
|
{
|
|
RegisterObjectData *data = user_data;
|
|
GValue params[] = { G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT };
|
|
|
|
g_value_init (¶ms[0], G_TYPE_DBUS_CONNECTION);
|
|
g_value_set_object (¶ms[0], connection);
|
|
|
|
g_value_init (¶ms[1], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[1], sender);
|
|
|
|
g_value_init (¶ms[2], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[2], object_path);
|
|
|
|
g_value_init (¶ms[3], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[3], interface_name);
|
|
|
|
g_value_init (¶ms[4], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[4], method_name);
|
|
|
|
g_value_init (¶ms[5], G_TYPE_VARIANT);
|
|
g_value_set_variant (¶ms[5], parameters);
|
|
|
|
g_value_init (¶ms[6], G_TYPE_DBUS_METHOD_INVOCATION);
|
|
g_value_set_object (¶ms[6], invocation);
|
|
|
|
g_closure_invoke (data->method_call_closure, NULL, G_N_ELEMENTS (params), params, NULL);
|
|
|
|
g_value_unset (params + 0);
|
|
g_value_unset (params + 1);
|
|
g_value_unset (params + 2);
|
|
g_value_unset (params + 3);
|
|
g_value_unset (params + 4);
|
|
g_value_unset (params + 5);
|
|
g_value_unset (params + 6);
|
|
}
|
|
|
|
static GVariant *
|
|
register_with_closures_on_get_property (GDBusConnection *connection,
|
|
const gchar *sender,
|
|
const gchar *object_path,
|
|
const gchar *interface_name,
|
|
const gchar *property_name,
|
|
GError **error,
|
|
gpointer user_data)
|
|
{
|
|
RegisterObjectData *data = user_data;
|
|
GValue params[] = { G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT };
|
|
GValue result_value = G_VALUE_INIT;
|
|
GVariant *result;
|
|
|
|
g_value_init (¶ms[0], G_TYPE_DBUS_CONNECTION);
|
|
g_value_set_object (¶ms[0], connection);
|
|
|
|
g_value_init (¶ms[1], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[1], sender);
|
|
|
|
g_value_init (¶ms[2], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[2], object_path);
|
|
|
|
g_value_init (¶ms[3], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[3], interface_name);
|
|
|
|
g_value_init (¶ms[4], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[4], property_name);
|
|
|
|
g_value_init (&result_value, G_TYPE_VARIANT);
|
|
|
|
g_closure_invoke (data->get_property_closure, &result_value, G_N_ELEMENTS (params), params, NULL);
|
|
|
|
result = g_value_get_variant (&result_value);
|
|
if (result)
|
|
g_variant_ref (result);
|
|
|
|
g_value_unset (params + 0);
|
|
g_value_unset (params + 1);
|
|
g_value_unset (params + 2);
|
|
g_value_unset (params + 3);
|
|
g_value_unset (params + 4);
|
|
g_value_unset (&result_value);
|
|
|
|
if (!result)
|
|
g_set_error (error, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
|
|
_("Unable to retrieve property %s.%s"),
|
|
interface_name, property_name);
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
register_with_closures_on_set_property (GDBusConnection *connection,
|
|
const gchar *sender,
|
|
const gchar *object_path,
|
|
const gchar *interface_name,
|
|
const gchar *property_name,
|
|
GVariant *value,
|
|
GError **error,
|
|
gpointer user_data)
|
|
{
|
|
RegisterObjectData *data = user_data;
|
|
GValue params[] = { G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT, G_VALUE_INIT };
|
|
GValue result_value = G_VALUE_INIT;
|
|
gboolean result;
|
|
|
|
g_value_init (¶ms[0], G_TYPE_DBUS_CONNECTION);
|
|
g_value_set_object (¶ms[0], connection);
|
|
|
|
g_value_init (¶ms[1], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[1], sender);
|
|
|
|
g_value_init (¶ms[2], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[2], object_path);
|
|
|
|
g_value_init (¶ms[3], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[3], interface_name);
|
|
|
|
g_value_init (¶ms[4], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[4], property_name);
|
|
|
|
g_value_init (¶ms[5], G_TYPE_VARIANT);
|
|
g_value_set_variant (¶ms[5], value);
|
|
|
|
g_value_init (&result_value, G_TYPE_BOOLEAN);
|
|
|
|
g_closure_invoke (data->set_property_closure, &result_value, G_N_ELEMENTS (params), params, NULL);
|
|
|
|
result = g_value_get_boolean (&result_value);
|
|
|
|
g_value_unset (params + 0);
|
|
g_value_unset (params + 1);
|
|
g_value_unset (params + 2);
|
|
g_value_unset (params + 3);
|
|
g_value_unset (params + 4);
|
|
g_value_unset (params + 5);
|
|
g_value_unset (&result_value);
|
|
|
|
if (!result)
|
|
g_set_error (error,
|
|
G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
|
|
_("Unable to set property %s.%s"),
|
|
interface_name, property_name);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* g_dbus_connection_register_object_with_closures: (rename-to g_dbus_connection_register_object)
|
|
* @connection: A #GDBusConnection.
|
|
* @object_path: The object path to register at.
|
|
* @interface_info: Introspection data for the interface.
|
|
* @method_call_closure: (nullable): #GClosure for handling incoming method calls.
|
|
* @get_property_closure: (nullable): #GClosure for getting a property.
|
|
* @set_property_closure: (nullable): #GClosure for setting a property.
|
|
* @error: Return location for error or %NULL.
|
|
*
|
|
* Version of g_dbus_connection_register_object() using closures instead of a
|
|
* #GDBusInterfaceVTable for easier binding in other languages.
|
|
*
|
|
* Returns: 0 if @error is set, otherwise a registration id (never 0)
|
|
* that can be used with g_dbus_connection_unregister_object() .
|
|
*
|
|
* Since: 2.46
|
|
*/
|
|
guint
|
|
g_dbus_connection_register_object_with_closures (GDBusConnection *connection,
|
|
const gchar *object_path,
|
|
GDBusInterfaceInfo *interface_info,
|
|
GClosure *method_call_closure,
|
|
GClosure *get_property_closure,
|
|
GClosure *set_property_closure,
|
|
GError **error)
|
|
{
|
|
RegisterObjectData *data;
|
|
GDBusInterfaceVTable vtable =
|
|
{
|
|
method_call_closure != NULL ? register_with_closures_on_method_call : NULL,
|
|
get_property_closure != NULL ? register_with_closures_on_get_property : NULL,
|
|
set_property_closure != NULL ? register_with_closures_on_set_property : NULL
|
|
};
|
|
|
|
data = register_object_data_new (method_call_closure, get_property_closure, set_property_closure);
|
|
|
|
return g_dbus_connection_register_object (connection,
|
|
object_path,
|
|
interface_info,
|
|
&vtable,
|
|
data,
|
|
register_object_free_func,
|
|
error);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/**
|
|
* g_dbus_connection_emit_signal:
|
|
* @connection: a #GDBusConnection
|
|
* @destination_bus_name: (nullable): 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: (nullable): 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
|
|
*/
|
|
gboolean
|
|
g_dbus_connection_emit_signal (GDBusConnection *connection,
|
|
const gchar *destination_bus_name,
|
|
const gchar *object_path,
|
|
const gchar *interface_name,
|
|
const gchar *signal_name,
|
|
GVariant *parameters,
|
|
GError **error)
|
|
{
|
|
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);
|
|
g_return_val_if_fail (check_initialized (connection), 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 void
|
|
add_call_flags (GDBusMessage *message,
|
|
GDBusCallFlags flags)
|
|
{
|
|
GDBusMessageFlags msg_flags = 0;
|
|
|
|
if (flags & G_DBUS_CALL_FLAGS_NO_AUTO_START)
|
|
msg_flags |= G_DBUS_MESSAGE_FLAGS_NO_AUTO_START;
|
|
if (flags & G_DBUS_CALL_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION)
|
|
msg_flags |= G_DBUS_MESSAGE_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION;
|
|
if (msg_flags)
|
|
g_dbus_message_set_flags (message, msg_flags);
|
|
}
|
|
|
|
static GVariant *
|
|
decode_method_reply (GDBusMessage *reply,
|
|
const gchar *method_name,
|
|
const GVariantType *reply_type,
|
|
GUnixFDList **out_fd_list,
|
|
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;
|
|
}
|
|
|
|
#ifdef G_OS_UNIX
|
|
if (result != NULL)
|
|
{
|
|
if (out_fd_list != NULL)
|
|
{
|
|
*out_fd_list = g_dbus_message_get_unix_fd_list (reply);
|
|
if (*out_fd_list != NULL)
|
|
g_object_ref (*out_fd_list);
|
|
}
|
|
}
|
|
#endif
|
|
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
|
|
{
|
|
GVariantType *reply_type;
|
|
gchar *method_name; /* for error message */
|
|
guint32 serial;
|
|
|
|
GUnixFDList *fd_list;
|
|
} CallState;
|
|
|
|
static void
|
|
call_state_free (CallState *state)
|
|
{
|
|
g_variant_type_free (state->reply_type);
|
|
g_free (state->method_name);
|
|
|
|
if (state->fd_list != NULL)
|
|
g_object_unref (state->fd_list);
|
|
g_slice_free (CallState, state);
|
|
}
|
|
|
|
/* called in any thread, with the connection's lock not held */
|
|
static void
|
|
g_dbus_connection_call_done (GObject *source,
|
|
GAsyncResult *result,
|
|
gpointer user_data)
|
|
{
|
|
GDBusConnection *connection = G_DBUS_CONNECTION (source);
|
|
GTask *task = user_data;
|
|
CallState *state = g_task_get_task_data (task);
|
|
GError *error = NULL;
|
|
GDBusMessage *reply;
|
|
GVariant *value = 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, &state->fd_list, &error);
|
|
|
|
if (error != NULL)
|
|
g_task_return_error (task, error);
|
|
else
|
|
g_task_return_pointer (task, value, (GDestroyNotify) g_variant_unref);
|
|
|
|
g_clear_object (&reply);
|
|
g_object_unref (task);
|
|
}
|
|
|
|
/* called in any thread, with the connection's lock not held */
|
|
static void
|
|
g_dbus_connection_call_internal (GDBusConnection *connection,
|
|
const gchar *bus_name,
|
|
const gchar *object_path,
|
|
const gchar *interface_name,
|
|
const gchar *method_name,
|
|
GVariant *parameters,
|
|
const GVariantType *reply_type,
|
|
GDBusCallFlags flags,
|
|
gint timeout_msec,
|
|
GUnixFDList *fd_list,
|
|
GCancellable *cancellable,
|
|
GAsyncReadyCallback callback,
|
|
gpointer user_data)
|
|
{
|
|
GDBusMessage *message;
|
|
guint32 serial;
|
|
|
|
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));
|
|
g_return_if_fail (check_initialized (connection));
|
|
#ifdef G_OS_UNIX
|
|
g_return_if_fail (fd_list == NULL || G_IS_UNIX_FD_LIST (fd_list));
|
|
#else
|
|
g_return_if_fail (fd_list == NULL);
|
|
#endif
|
|
|
|
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);
|
|
|
|
#ifdef G_OS_UNIX
|
|
if (fd_list != NULL)
|
|
g_dbus_message_set_unix_fd_list (message, fd_list);
|
|
#endif
|
|
|
|
/* If the user has no callback then we can just send the message with
|
|
* the G_DBUS_MESSAGE_FLAGS_NO_REPLY_EXPECTED flag set and skip all
|
|
* the logic for processing the reply. If the service sends the reply
|
|
* anyway then it will just be ignored.
|
|
*/
|
|
if (callback != NULL)
|
|
{
|
|
CallState *state;
|
|
GTask *task;
|
|
|
|
state = g_slice_new0 (CallState);
|
|
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);
|
|
|
|
task = g_task_new (connection, cancellable, callback, user_data);
|
|
g_task_set_source_tag (task, g_dbus_connection_call_internal);
|
|
g_task_set_task_data (task, state, (GDestroyNotify) call_state_free);
|
|
|
|
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,
|
|
task);
|
|
serial = state->serial;
|
|
}
|
|
else
|
|
{
|
|
GDBusMessageFlags flags;
|
|
|
|
flags = g_dbus_message_get_flags (message);
|
|
flags |= G_DBUS_MESSAGE_FLAGS_NO_REPLY_EXPECTED;
|
|
g_dbus_message_set_flags (message, flags);
|
|
|
|
g_dbus_connection_send_message (connection,
|
|
message,
|
|
G_DBUS_SEND_MESSAGE_FLAGS_NONE,
|
|
&serial, NULL);
|
|
}
|
|
|
|
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)",
|
|
serial);
|
|
_g_dbus_debug_print_unlock ();
|
|
}
|
|
|
|
if (message != NULL)
|
|
g_object_unref (message);
|
|
}
|
|
|
|
/* called in any thread, with the connection's lock not held */
|
|
static GVariant *
|
|
g_dbus_connection_call_finish_internal (GDBusConnection *connection,
|
|
GUnixFDList **out_fd_list,
|
|
GAsyncResult *res,
|
|
GError **error)
|
|
{
|
|
GTask *task;
|
|
CallState *state;
|
|
GVariant *ret;
|
|
|
|
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
|
|
g_return_val_if_fail (g_task_is_valid (res, connection), NULL);
|
|
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
|
|
|
|
task = G_TASK (res);
|
|
state = g_task_get_task_data (task);
|
|
|
|
ret = g_task_propagate_pointer (task, error);
|
|
if (!ret)
|
|
return NULL;
|
|
|
|
if (out_fd_list != NULL)
|
|
*out_fd_list = state->fd_list != NULL ? g_object_ref (state->fd_list) : NULL;
|
|
return ret;
|
|
}
|
|
|
|
/* called in any user thread, with the connection's lock not held */
|
|
static GVariant *
|
|
g_dbus_connection_call_sync_internal (GDBusConnection *connection,
|
|
const gchar *bus_name,
|
|
const gchar *object_path,
|
|
const gchar *interface_name,
|
|
const gchar *method_name,
|
|
GVariant *parameters,
|
|
const GVariantType *reply_type,
|
|
GDBusCallFlags flags,
|
|
gint timeout_msec,
|
|
GUnixFDList *fd_list,
|
|
GUnixFDList **out_fd_list,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
GDBusMessage *message;
|
|
GDBusMessage *reply;
|
|
GVariant *result;
|
|
GError *local_error;
|
|
GDBusSendMessageFlags send_flags;
|
|
|
|
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);
|
|
#ifdef G_OS_UNIX
|
|
g_return_val_if_fail (fd_list == NULL || G_IS_UNIX_FD_LIST (fd_list), NULL);
|
|
#else
|
|
g_return_val_if_fail (fd_list == NULL, NULL);
|
|
#endif
|
|
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
|
|
|
|
if (!(flags & CALL_FLAGS_INITIALIZING))
|
|
g_return_val_if_fail (check_initialized (connection), FALSE);
|
|
|
|
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);
|
|
|
|
#ifdef G_OS_UNIX
|
|
if (fd_list != NULL)
|
|
g_dbus_message_set_unix_fd_list (message, fd_list);
|
|
#endif
|
|
|
|
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;
|
|
|
|
send_flags = G_DBUS_SEND_MESSAGE_FLAGS_NONE;
|
|
|
|
/* translate from one flavour of flags to another... */
|
|
if (flags & CALL_FLAGS_INITIALIZING)
|
|
send_flags |= SEND_MESSAGE_FLAGS_INITIALIZING;
|
|
|
|
reply = g_dbus_connection_send_message_with_reply_sync (connection,
|
|
message,
|
|
send_flags,
|
|
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, out_fd_list, error);
|
|
|
|
out:
|
|
if (message != NULL)
|
|
g_object_unref (message);
|
|
if (reply != NULL)
|
|
g_object_unref (reply);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/**
|
|
* g_dbus_connection_call:
|
|
* @connection: a #GDBusConnection
|
|
* @bus_name: (nullable): 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: (nullable): a #GVariant tuple with parameters for the method
|
|
* or %NULL if not passing parameters
|
|
* @reply_type: (nullable): 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: (nullable): a #GCancellable or %NULL
|
|
* @callback: (nullable): 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.:
|
|
* |[<!-- language="C" -->
|
|
* 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
|
|
* [thread-default main context][g-main-context-push-thread-default]
|
|
* 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.
|
|
*
|
|
* If @callback is %NULL then the D-Bus method call message will be sent with
|
|
* the %G_DBUS_MESSAGE_FLAGS_NO_REPLY_EXPECTED flag set.
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
void
|
|
g_dbus_connection_call (GDBusConnection *connection,
|
|
const gchar *bus_name,
|
|
const gchar *object_path,
|
|
const gchar *interface_name,
|
|
const gchar *method_name,
|
|
GVariant *parameters,
|
|
const GVariantType *reply_type,
|
|
GDBusCallFlags flags,
|
|
gint timeout_msec,
|
|
GCancellable *cancellable,
|
|
GAsyncReadyCallback callback,
|
|
gpointer user_data)
|
|
{
|
|
g_dbus_connection_call_internal (connection, bus_name, object_path, interface_name, method_name, parameters, reply_type, flags, timeout_msec, NULL, cancellable, callback, user_data);
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
return g_dbus_connection_call_finish_internal (connection, NULL, res, error);
|
|
}
|
|
|
|
/**
|
|
* g_dbus_connection_call_sync:
|
|
* @connection: a #GDBusConnection
|
|
* @bus_name: (nullable): 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: (nullable): a #GVariant tuple with parameters for the method
|
|
* or %NULL if not passing parameters
|
|
* @reply_type: (nullable): 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: (nullable): 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.:
|
|
* |[<!-- language="C" -->
|
|
* 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)
|
|
{
|
|
return g_dbus_connection_call_sync_internal (connection, bus_name, object_path, interface_name, method_name, parameters, reply_type, flags, timeout_msec, NULL, NULL, cancellable, error);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
#ifdef G_OS_UNIX
|
|
|
|
/**
|
|
* g_dbus_connection_call_with_unix_fd_list:
|
|
* @connection: a #GDBusConnection
|
|
* @bus_name: (nullable): 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: (nullable): a #GVariant tuple with parameters for the method
|
|
* or %NULL if not passing parameters
|
|
* @reply_type: (nullable): 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
|
|
* @fd_list: (nullable): a #GUnixFDList or %NULL
|
|
* @cancellable: (nullable): a #GCancellable or %NULL
|
|
* @callback: (nullable): 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.
|
|
*
|
|
* Like g_dbus_connection_call() but also takes a #GUnixFDList object.
|
|
*
|
|
* This method is only available on UNIX.
|
|
*
|
|
* Since: 2.30
|
|
*/
|
|
void
|
|
g_dbus_connection_call_with_unix_fd_list (GDBusConnection *connection,
|
|
const gchar *bus_name,
|
|
const gchar *object_path,
|
|
const gchar *interface_name,
|
|
const gchar *method_name,
|
|
GVariant *parameters,
|
|
const GVariantType *reply_type,
|
|
GDBusCallFlags flags,
|
|
gint timeout_msec,
|
|
GUnixFDList *fd_list,
|
|
GCancellable *cancellable,
|
|
GAsyncReadyCallback callback,
|
|
gpointer user_data)
|
|
{
|
|
g_dbus_connection_call_internal (connection, bus_name, object_path, interface_name, method_name, parameters, reply_type, flags, timeout_msec, fd_list, cancellable, callback, user_data);
|
|
}
|
|
|
|
/**
|
|
* g_dbus_connection_call_with_unix_fd_list_finish:
|
|
* @connection: a #GDBusConnection
|
|
* @out_fd_list: (out) (optional): return location for a #GUnixFDList or %NULL
|
|
* @res: a #GAsyncResult obtained from the #GAsyncReadyCallback passed to
|
|
* g_dbus_connection_call_with_unix_fd_list()
|
|
* @error: return location for error or %NULL
|
|
*
|
|
* Finishes an operation started with g_dbus_connection_call_with_unix_fd_list().
|
|
*
|
|
* Returns: %NULL if @error is set. Otherwise a #GVariant tuple with
|
|
* return values. Free with g_variant_unref().
|
|
*
|
|
* Since: 2.30
|
|
*/
|
|
GVariant *
|
|
g_dbus_connection_call_with_unix_fd_list_finish (GDBusConnection *connection,
|
|
GUnixFDList **out_fd_list,
|
|
GAsyncResult *res,
|
|
GError **error)
|
|
{
|
|
return g_dbus_connection_call_finish_internal (connection, out_fd_list, res, error);
|
|
}
|
|
|
|
/**
|
|
* g_dbus_connection_call_with_unix_fd_list_sync:
|
|
* @connection: a #GDBusConnection
|
|
* @bus_name: (nullable): 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: (nullable): a #GVariant tuple with parameters for
|
|
* the method or %NULL if not passing parameters
|
|
* @reply_type: (nullable): 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
|
|
* @fd_list: (nullable): a #GUnixFDList or %NULL
|
|
* @out_fd_list: (out) (optional): return location for a #GUnixFDList or %NULL
|
|
* @cancellable: (nullable): a #GCancellable or %NULL
|
|
* @error: return location for error or %NULL
|
|
*
|
|
* Like g_dbus_connection_call_sync() but also takes and returns #GUnixFDList objects.
|
|
*
|
|
* This method is only available on UNIX.
|
|
*
|
|
* Returns: %NULL if @error is set. Otherwise a #GVariant tuple with
|
|
* return values. Free with g_variant_unref().
|
|
*
|
|
* Since: 2.30
|
|
*/
|
|
GVariant *
|
|
g_dbus_connection_call_with_unix_fd_list_sync (GDBusConnection *connection,
|
|
const gchar *bus_name,
|
|
const gchar *object_path,
|
|
const gchar *interface_name,
|
|
const gchar *method_name,
|
|
GVariant *parameters,
|
|
const GVariantType *reply_type,
|
|
GDBusCallFlags flags,
|
|
gint timeout_msec,
|
|
GUnixFDList *fd_list,
|
|
GUnixFDList **out_fd_list,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
return g_dbus_connection_call_sync_internal (connection, bus_name, object_path, interface_name, method_name, parameters, reply_type, flags, timeout_msec, fd_list, out_fd_list, cancellable, error);
|
|
}
|
|
|
|
#endif /* G_OS_UNIX */
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
struct ExportedSubtree
|
|
{
|
|
guint id;
|
|
gchar *object_path;
|
|
GDBusConnection *connection;
|
|
GDBusSubtreeVTable *vtable;
|
|
GDBusSubtreeFlags flags;
|
|
|
|
GMainContext *context;
|
|
gpointer user_data;
|
|
GDestroyNotify user_data_free_func;
|
|
};
|
|
|
|
static void
|
|
exported_subtree_free (ExportedSubtree *es)
|
|
{
|
|
call_destroy_notify (es->context,
|
|
es->user_data_free_func,
|
|
es->user_data);
|
|
|
|
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 in the thread where the caller registered
|
|
* the subtree
|
|
*/
|
|
static gboolean
|
|
handle_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 in the thread where the caller registered
|
|
* the subtree
|
|
*/
|
|
static gboolean
|
|
handle_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 void
|
|
subtree_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 gboolean
|
|
process_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 GDBusWorker thread with connection's lock held */
|
|
static gboolean
|
|
subtree_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_set_name (idle_source, "[gio] process_subtree_vtable_message_in_idle_cb");
|
|
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 dynamic 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
|
|
* [thread-default main context][g-main-context-push-thread-default]
|
|
* 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 fallback handler 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 this [server][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
|
|
*/
|
|
guint
|
|
g_dbus_connection_register_subtree (GDBusConnection *connection,
|
|
const gchar *object_path,
|
|
const GDBusSubtreeVTable *vtable,
|
|
GDBusSubtreeFlags flags,
|
|
gpointer user_data,
|
|
GDestroyNotify user_data_free_func,
|
|
GError **error)
|
|
{
|
|
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);
|
|
g_return_val_if_fail (check_initialized (connection), 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 = g_atomic_int_add (&_global_subtree_registration_id, 1); /* TODO: overflow etc. */
|
|
es->user_data = user_data;
|
|
es->user_data_free_func = user_data_free_func;
|
|
es->context = g_main_context_ref_thread_default ();
|
|
|
|
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
|
|
*/
|
|
gboolean
|
|
g_dbus_connection_unregister_subtree (GDBusConnection *connection,
|
|
guint registration_id)
|
|
{
|
|
ExportedSubtree *es;
|
|
gboolean ret;
|
|
|
|
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
|
|
g_return_val_if_fail (check_initialized (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;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* may be called in any thread, with connection's lock held */
|
|
static void
|
|
handle_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);
|
|
}
|
|
|
|
/* may be called in any thread, with connection's lock held */
|
|
static void
|
|
handle_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);
|
|
}
|
|
|
|
/* may be called in any thread, with connection's lock held */
|
|
static void
|
|
handle_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);
|
|
}
|
|
|
|
/* may be called in any thread, with connection's lock held */
|
|
static gboolean
|
|
handle_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 GDBusWorker thread with connection's lock held */
|
|
static void
|
|
distribute_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 *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);
|
|
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 ();
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
/* Called in any user thread, with the message_bus_lock held. */
|
|
static GWeakRef *
|
|
message_bus_get_singleton (GBusType bus_type,
|
|
GError **error)
|
|
{
|
|
GWeakRef *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;
|
|
}
|
|
|
|
/* Called in any user thread, without holding locks. */
|
|
static GDBusConnection *
|
|
get_uninitialized_connection (GBusType bus_type,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
GWeakRef *singleton;
|
|
GDBusConnection *ret;
|
|
|
|
ret = NULL;
|
|
|
|
G_LOCK (message_bus_lock);
|
|
singleton = message_bus_get_singleton (bus_type, error);
|
|
if (singleton == NULL)
|
|
goto out;
|
|
|
|
ret = g_weak_ref_get (singleton);
|
|
|
|
if (ret == NULL)
|
|
{
|
|
gchar *address;
|
|
address = g_dbus_address_get_for_bus_sync (bus_type, cancellable, error);
|
|
if (address == NULL)
|
|
goto out;
|
|
ret = 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_weak_ref_set (singleton, ret);
|
|
g_free (address);
|
|
}
|
|
|
|
g_assert (ret != NULL);
|
|
|
|
out:
|
|
G_UNLOCK (message_bus_lock);
|
|
return ret;
|
|
}
|
|
|
|
/* May be called from any thread. Must not hold message_bus_lock. */
|
|
GDBusConnection *
|
|
_g_bus_get_singleton_if_exists (GBusType bus_type)
|
|
{
|
|
GWeakRef *singleton;
|
|
GDBusConnection *ret = NULL;
|
|
|
|
G_LOCK (message_bus_lock);
|
|
singleton = message_bus_get_singleton (bus_type, NULL);
|
|
if (singleton == NULL)
|
|
goto out;
|
|
|
|
ret = g_weak_ref_get (singleton);
|
|
|
|
out:
|
|
G_UNLOCK (message_bus_lock);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* g_bus_get_sync:
|
|
* @bus_type: a #GBusType
|
|
* @cancellable: (nullable): 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_dbus_initialize ();
|
|
|
|
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 void
|
|
bus_get_async_initable_cb (GObject *source_object,
|
|
GAsyncResult *res,
|
|
gpointer user_data)
|
|
{
|
|
GTask *task = user_data;
|
|
GError *error = NULL;
|
|
|
|
if (!g_async_initable_init_finish (G_ASYNC_INITABLE (source_object),
|
|
res,
|
|
&error))
|
|
{
|
|
g_assert (error != NULL);
|
|
g_task_return_error (task, error);
|
|
g_object_unref (source_object);
|
|
}
|
|
else
|
|
{
|
|
g_task_return_pointer (task, source_object, g_object_unref);
|
|
}
|
|
g_object_unref (task);
|
|
}
|
|
|
|
/**
|
|
* g_bus_get:
|
|
* @bus_type: a #GBusType
|
|
* @cancellable: (nullable): 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
|
|
*/
|
|
void
|
|
g_bus_get (GBusType bus_type,
|
|
GCancellable *cancellable,
|
|
GAsyncReadyCallback callback,
|
|
gpointer user_data)
|
|
{
|
|
GDBusConnection *connection;
|
|
GTask *task;
|
|
GError *error = NULL;
|
|
|
|
_g_dbus_initialize ();
|
|
|
|
task = g_task_new (NULL, cancellable, callback, user_data);
|
|
g_task_set_source_tag (task, g_bus_get);
|
|
|
|
connection = get_uninitialized_connection (bus_type, cancellable, &error);
|
|
if (connection == NULL)
|
|
{
|
|
g_assert (error != NULL);
|
|
g_task_return_error (task, error);
|
|
g_object_unref (task);
|
|
}
|
|
else
|
|
{
|
|
g_async_initable_init_async (G_ASYNC_INITABLE (connection),
|
|
G_PRIORITY_DEFAULT,
|
|
cancellable,
|
|
bus_get_async_initable_cb,
|
|
task);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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_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_finish (GAsyncResult *res,
|
|
GError **error)
|
|
{
|
|
g_return_val_if_fail (g_task_is_valid (res, NULL), NULL);
|
|
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
|
|
|
|
return g_task_propagate_pointer (G_TASK (res), error);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|