1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright © 2008 Christian Kellner, Samuel Cormier-Iijima
5 * Copyright © 2009 Red Hat, Inc
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General
18 * Public License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20 * Boston, MA 02111-1307, USA.
22 * Authors: Christian Kellner <gicmo@gnome.org>
23 * Samuel Cormier-Iijima <sciyoshi@gmail.com>
24 * Ryan Lortie <desrt@desrt.ca>
25 * Alexander Larsson <alexl@redhat.com>
30 #include "gsocketconnection.h"
32 #include "gsocketoutputstream.h"
33 #include "gsocketinputstream.h"
34 #include "gioprivate.h"
35 #include <gio/giostream.h>
36 #include <gio/gtask.h>
37 #include "gunixconnection.h"
38 #include "gtcpconnection.h"
43 * SECTION:gsocketconnection
44 * @short_description: A socket connection
46 * @see_also: #GIOStream, #GSocketClient, #GSocketListener
48 * #GSocketConnection is a #GIOStream for a connected socket. They
49 * can be created either by #GSocketClient when connecting to a host,
50 * or by #GSocketListener when accepting a new client.
52 * The type of the #GSocketConnection object returned from these calls
53 * depends on the type of the underlying socket that is in use. For
54 * instance, for a TCP/IP connection it will be a #GTcpConnection.
56 * Choosing what type of object to construct is done with the socket
57 * connection factory, and it is possible for 3rd parties to register
58 * custom socket connection types for specific combination of socket
59 * family/type/protocol using g_socket_connection_factory_register_type().
70 struct _GSocketConnectionPrivate
73 GInputStream
*input_stream
;
74 GOutputStream
*output_stream
;
76 GSocketAddress
*cached_remote_address
;
81 static gboolean
g_socket_connection_close (GIOStream
*stream
,
82 GCancellable
*cancellable
,
84 static void g_socket_connection_close_async (GIOStream
*stream
,
86 GCancellable
*cancellable
,
87 GAsyncReadyCallback callback
,
89 static gboolean
g_socket_connection_close_finish (GIOStream
*stream
,
93 G_DEFINE_TYPE_WITH_PRIVATE (GSocketConnection
, g_socket_connection
, G_TYPE_IO_STREAM
)
96 g_socket_connection_get_input_stream (GIOStream
*io_stream
)
98 GSocketConnection
*connection
= G_SOCKET_CONNECTION (io_stream
);
100 if (connection
->priv
->input_stream
== NULL
)
101 connection
->priv
->input_stream
= (GInputStream
*)
102 _g_socket_input_stream_new (connection
->priv
->socket
);
104 return connection
->priv
->input_stream
;
107 static GOutputStream
*
108 g_socket_connection_get_output_stream (GIOStream
*io_stream
)
110 GSocketConnection
*connection
= G_SOCKET_CONNECTION (io_stream
);
112 if (connection
->priv
->output_stream
== NULL
)
113 connection
->priv
->output_stream
= (GOutputStream
*)
114 _g_socket_output_stream_new (connection
->priv
->socket
);
116 return connection
->priv
->output_stream
;
120 * g_socket_connection_is_connected:
121 * @connection: a #GSocketConnection
123 * Checks if @connection is connected. This is equivalent to calling
124 * g_socket_is_connected() on @connection's underlying #GSocket.
126 * Returns: whether @connection is connected
131 g_socket_connection_is_connected (GSocketConnection
*connection
)
133 return g_socket_is_connected (connection
->priv
->socket
);
137 * g_socket_connection_connect:
138 * @connection: a #GSocketConnection
139 * @address: a #GSocketAddress specifying the remote address.
140 * @cancellable: (allow-none): a %GCancellable or %NULL
141 * @error: #GError for error reporting, or %NULL to ignore.
143 * Connect @connection to the specified remote address.
145 * Returns: %TRUE if the connection succeeded, %FALSE on error
150 g_socket_connection_connect (GSocketConnection
*connection
,
151 GSocketAddress
*address
,
152 GCancellable
*cancellable
,
155 g_return_val_if_fail (G_IS_SOCKET_CONNECTION (connection
), FALSE
);
156 g_return_val_if_fail (G_IS_SOCKET_ADDRESS (address
), FALSE
);
158 return g_socket_connect (connection
->priv
->socket
, address
,
162 static gboolean
g_socket_connection_connect_callback (GSocket
*socket
,
163 GIOCondition condition
,
167 * g_socket_connection_connect_async:
168 * @connection: a #GSocketConnection
169 * @address: a #GSocketAddress specifying the remote address.
170 * @cancellable: (allow-none): a %GCancellable or %NULL
171 * @callback: (scope async): a #GAsyncReadyCallback
172 * @user_data: (closure): user data for the callback
174 * Asynchronously connect @connection to the specified remote address.
176 * This clears the #GSocket:blocking flag on @connection's underlying
177 * socket if it is currently set.
179 * Use g_socket_connection_connect_finish() to retrieve the result.
184 g_socket_connection_connect_async (GSocketConnection
*connection
,
185 GSocketAddress
*address
,
186 GCancellable
*cancellable
,
187 GAsyncReadyCallback callback
,
191 GError
*tmp_error
= NULL
;
193 g_return_if_fail (G_IS_SOCKET_CONNECTION (connection
));
194 g_return_if_fail (G_IS_SOCKET_ADDRESS (address
));
196 task
= g_task_new (connection
, cancellable
, callback
, user_data
);
198 g_socket_set_blocking (connection
->priv
->socket
, FALSE
);
200 if (g_socket_connect (connection
->priv
->socket
, address
,
201 cancellable
, &tmp_error
))
203 g_task_return_boolean (task
, TRUE
);
204 g_object_unref (task
);
206 else if (g_error_matches (tmp_error
, G_IO_ERROR
, G_IO_ERROR_PENDING
))
210 g_error_free (tmp_error
);
211 source
= g_socket_create_source (connection
->priv
->socket
,
212 G_IO_OUT
, cancellable
);
213 g_task_attach_source (task
, source
,
214 (GSourceFunc
) g_socket_connection_connect_callback
);
215 g_source_unref (source
);
219 g_task_return_error (task
, tmp_error
);
220 g_object_unref (task
);
225 g_socket_connection_connect_callback (GSocket
*socket
,
226 GIOCondition condition
,
229 GTask
*task
= user_data
;
230 GSocketConnection
*connection
= g_task_get_source_object (task
);
231 GError
*error
= NULL
;
233 if (g_socket_check_connect_result (connection
->priv
->socket
, &error
))
234 g_task_return_boolean (task
, TRUE
);
236 g_task_return_error (task
, error
);
238 g_object_unref (task
);
243 * g_socket_connection_connect_finish:
244 * @connection: a #GSocketConnection
245 * @result: the #GAsyncResult
246 * @error: #GError for error reporting, or %NULL to ignore.
248 * Gets the result of a g_socket_connection_connect_async() call.
250 * Returns: %TRUE if the connection succeeded, %FALSE on error
255 g_socket_connection_connect_finish (GSocketConnection
*connection
,
256 GAsyncResult
*result
,
259 g_return_val_if_fail (G_IS_SOCKET_CONNECTION (connection
), FALSE
);
260 g_return_val_if_fail (g_task_is_valid (result
, connection
), FALSE
);
262 return g_task_propagate_boolean (G_TASK (result
), error
);
266 * g_socket_connection_get_socket:
267 * @connection: a #GSocketConnection
269 * Gets the underlying #GSocket object of the connection.
270 * This can be useful if you want to do something unusual on it
271 * not supported by the #GSocketConnection APIs.
273 * Returns: (transfer none): a #GSocketAddress or %NULL on error.
278 g_socket_connection_get_socket (GSocketConnection
*connection
)
280 g_return_val_if_fail (G_IS_SOCKET_CONNECTION (connection
), NULL
);
282 return connection
->priv
->socket
;
286 * g_socket_connection_get_local_address:
287 * @connection: a #GSocketConnection
288 * @error: #GError for error reporting, or %NULL to ignore.
290 * Try to get the local address of a socket connection.
292 * Returns: (transfer full): a #GSocketAddress or %NULL on error.
293 * Free the returned object with g_object_unref().
298 g_socket_connection_get_local_address (GSocketConnection
*connection
,
301 return g_socket_get_local_address (connection
->priv
->socket
, error
);
305 * g_socket_connection_get_remote_address:
306 * @connection: a #GSocketConnection
307 * @error: #GError for error reporting, or %NULL to ignore.
309 * Try to get the remote address of a socket connection.
311 * Since GLib 2.40, when used with g_socket_client_connect() or
312 * g_socket_client_connect_async(), during emission of
313 * %G_SOCKET_CLIENT_CONNECTING, this function will return the remote
314 * address that will be used for the connection. This allows
315 * applications to print e.g. "Connecting to example.com
318 * Returns: (transfer full): a #GSocketAddress or %NULL on error.
319 * Free the returned object with g_object_unref().
324 g_socket_connection_get_remote_address (GSocketConnection
*connection
,
327 if (!g_socket_is_connected (connection
->priv
->socket
))
329 return connection
->priv
->cached_remote_address
?
330 g_object_ref (connection
->priv
->cached_remote_address
) : NULL
;
332 return g_socket_get_remote_address (connection
->priv
->socket
, error
);
335 /* Private API allowing applications to retrieve the resolved address
336 * now, before we start connecting.
338 * https://bugzilla.gnome.org/show_bug.cgi?id=712547
341 g_socket_connection_set_cached_remote_address (GSocketConnection
*connection
,
342 GSocketAddress
*address
)
344 g_clear_object (&connection
->priv
->cached_remote_address
);
345 connection
->priv
->cached_remote_address
= address
? g_object_ref (address
) : NULL
;
349 g_socket_connection_get_property (GObject
*object
,
354 GSocketConnection
*connection
= G_SOCKET_CONNECTION (object
);
359 g_value_set_object (value
, connection
->priv
->socket
);
363 G_OBJECT_WARN_INVALID_PROPERTY_ID (object
, prop_id
, pspec
);
368 g_socket_connection_set_property (GObject
*object
,
373 GSocketConnection
*connection
= G_SOCKET_CONNECTION (object
);
378 connection
->priv
->socket
= G_SOCKET (g_value_dup_object (value
));
382 G_OBJECT_WARN_INVALID_PROPERTY_ID (object
, prop_id
, pspec
);
387 g_socket_connection_constructed (GObject
*object
)
389 GSocketConnection
*connection
= G_SOCKET_CONNECTION (object
);
391 g_assert (connection
->priv
->socket
!= NULL
);
395 g_socket_connection_dispose (GObject
*object
)
397 GSocketConnection
*connection
= G_SOCKET_CONNECTION (object
);
399 connection
->priv
->in_dispose
= TRUE
;
401 g_clear_object (&connection
->priv
->cached_remote_address
);
403 G_OBJECT_CLASS (g_socket_connection_parent_class
)
406 connection
->priv
->in_dispose
= FALSE
;
410 g_socket_connection_finalize (GObject
*object
)
412 GSocketConnection
*connection
= G_SOCKET_CONNECTION (object
);
414 if (connection
->priv
->input_stream
)
415 g_object_unref (connection
->priv
->input_stream
);
417 if (connection
->priv
->output_stream
)
418 g_object_unref (connection
->priv
->output_stream
);
420 g_object_unref (connection
->priv
->socket
);
422 G_OBJECT_CLASS (g_socket_connection_parent_class
)
427 g_socket_connection_class_init (GSocketConnectionClass
*klass
)
429 GObjectClass
*gobject_class
= G_OBJECT_CLASS (klass
);
430 GIOStreamClass
*stream_class
= G_IO_STREAM_CLASS (klass
);
432 gobject_class
->set_property
= g_socket_connection_set_property
;
433 gobject_class
->get_property
= g_socket_connection_get_property
;
434 gobject_class
->constructed
= g_socket_connection_constructed
;
435 gobject_class
->finalize
= g_socket_connection_finalize
;
436 gobject_class
->dispose
= g_socket_connection_dispose
;
438 stream_class
->get_input_stream
= g_socket_connection_get_input_stream
;
439 stream_class
->get_output_stream
= g_socket_connection_get_output_stream
;
440 stream_class
->close_fn
= g_socket_connection_close
;
441 stream_class
->close_async
= g_socket_connection_close_async
;
442 stream_class
->close_finish
= g_socket_connection_close_finish
;
444 g_object_class_install_property (gobject_class
,
446 g_param_spec_object ("socket",
448 P_("The underlying GSocket"),
450 G_PARAM_CONSTRUCT_ONLY
|
452 G_PARAM_STATIC_STRINGS
));
456 g_socket_connection_init (GSocketConnection
*connection
)
458 connection
->priv
= g_socket_connection_get_instance_private (connection
);
462 g_socket_connection_close (GIOStream
*stream
,
463 GCancellable
*cancellable
,
466 GSocketConnection
*connection
= G_SOCKET_CONNECTION (stream
);
468 if (connection
->priv
->output_stream
)
469 g_output_stream_close (connection
->priv
->output_stream
,
471 if (connection
->priv
->input_stream
)
472 g_input_stream_close (connection
->priv
->input_stream
,
475 /* Don't close the underlying socket if this is being called
476 * as part of dispose(); when destroying the GSocketConnection,
477 * we only want to close the socket if we're holding the last
478 * reference on it, and in that case it will close itself when
479 * we unref it in finalize().
481 if (connection
->priv
->in_dispose
)
484 return g_socket_close (connection
->priv
->socket
, error
);
489 g_socket_connection_close_async (GIOStream
*stream
,
491 GCancellable
*cancellable
,
492 GAsyncReadyCallback callback
,
496 GIOStreamClass
*class;
499 class = G_IO_STREAM_GET_CLASS (stream
);
501 task
= g_task_new (stream
, cancellable
, callback
, user_data
);
503 /* socket close is not blocked, just do it! */
505 if (class->close_fn
&&
506 !class->close_fn (stream
, cancellable
, &error
))
507 g_task_return_error (task
, error
);
509 g_task_return_boolean (task
, TRUE
);
511 g_object_unref (task
);
515 g_socket_connection_close_finish (GIOStream
*stream
,
516 GAsyncResult
*result
,
519 return g_task_propagate_boolean (G_TASK (result
), error
);
523 GSocketFamily socket_family
;
524 GSocketType socket_type
;
526 GType implementation
;
530 connection_factory_hash (gconstpointer key
)
532 const ConnectionFactory
*factory
= key
;
535 h
= factory
->socket_family
^ (factory
->socket_type
<< 4) ^ (factory
->protocol
<< 8);
536 /* This is likely to be small, so spread over whole
537 hash space to get some distribution */
538 h
= h
^ (h
<< 8) ^ (h
<< 16) ^ (h
<< 24);
544 connection_factory_equal (gconstpointer _a
,
547 const ConnectionFactory
*a
= _a
;
548 const ConnectionFactory
*b
= _b
;
550 if (a
->socket_family
!= b
->socket_family
)
553 if (a
->socket_type
!= b
->socket_type
)
556 if (a
->protocol
!= b
->protocol
)
562 static GHashTable
*connection_factories
= NULL
;
563 G_LOCK_DEFINE_STATIC(connection_factories
);
566 * g_socket_connection_factory_register_type:
567 * @g_type: a #GType, inheriting from %G_TYPE_SOCKET_CONNECTION
568 * @family: a #GSocketFamily
569 * @type: a #GSocketType
570 * @protocol: a protocol id
572 * Looks up the #GType to be used when creating socket connections on
573 * sockets with the specified @family, @type and @protocol.
575 * If no type is registered, the #GSocketConnection base type is returned.
580 g_socket_connection_factory_register_type (GType g_type
,
581 GSocketFamily family
,
585 ConnectionFactory
*factory
;
587 g_return_if_fail (g_type_is_a (g_type
, G_TYPE_SOCKET_CONNECTION
));
589 G_LOCK (connection_factories
);
591 if (connection_factories
== NULL
)
592 connection_factories
= g_hash_table_new_full (connection_factory_hash
,
593 connection_factory_equal
,
594 (GDestroyNotify
)g_free
,
597 factory
= g_new0 (ConnectionFactory
, 1);
598 factory
->socket_family
= family
;
599 factory
->socket_type
= type
;
600 factory
->protocol
= protocol
;
601 factory
->implementation
= g_type
;
603 g_hash_table_insert (connection_factories
,
606 G_UNLOCK (connection_factories
);
610 init_builtin_types (void)
613 g_type_ensure (G_TYPE_UNIX_CONNECTION
);
615 g_type_ensure (G_TYPE_TCP_CONNECTION
);
619 * g_socket_connection_factory_lookup_type:
620 * @family: a #GSocketFamily
621 * @type: a #GSocketType
622 * @protocol_id: a protocol id
624 * Looks up the #GType to be used when creating socket connections on
625 * sockets with the specified @family, @type and @protocol_id.
627 * If no type is registered, the #GSocketConnection base type is returned.
634 g_socket_connection_factory_lookup_type (GSocketFamily family
,
638 ConnectionFactory
*factory
, key
;
641 init_builtin_types ();
643 G_LOCK (connection_factories
);
645 g_type
= G_TYPE_SOCKET_CONNECTION
;
647 if (connection_factories
)
649 key
.socket_family
= family
;
650 key
.socket_type
= type
;
651 key
.protocol
= protocol_id
;
653 factory
= g_hash_table_lookup (connection_factories
, &key
);
655 g_type
= factory
->implementation
;
658 G_UNLOCK (connection_factories
);
664 * g_socket_connection_factory_create_connection:
665 * @socket: a #GSocket
667 * Creates a #GSocketConnection subclass of the right type for
670 * Returns: (transfer full): a #GSocketConnection
675 g_socket_connection_factory_create_connection (GSocket
*socket
)
679 type
= g_socket_connection_factory_lookup_type (g_socket_get_family (socket
),
680 g_socket_get_socket_type (socket
),
681 g_socket_get_protocol (socket
));
682 return g_object_new (type
, "socket", socket
, NULL
);