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 <gio/giostream.h>
35 #include <gio/gtask.h>
36 #include "gunixconnection.h"
37 #include "gtcpconnection.h"
42 * SECTION:gsocketconnection
43 * @short_description: A socket connection
45 * @see_also: #GIOStream, #GSocketClient, #GSocketListener
47 * #GSocketConnection is a #GIOStream for a connected socket. They
48 * can be created either by #GSocketClient when connecting to a host,
49 * or by #GSocketListener when accepting a new client.
51 * The type of the #GSocketConnection object returned from these calls
52 * depends on the type of the underlying socket that is in use. For
53 * instance, for a TCP/IP connection it will be a #GTcpConnection.
55 * Choosing what type of object to construct is done with the socket
56 * connection factory, and it is possible for 3rd parties to register
57 * custom socket connection types for specific combination of socket
58 * family/type/protocol using g_socket_connection_factory_register_type().
69 struct _GSocketConnectionPrivate
72 GInputStream
*input_stream
;
73 GOutputStream
*output_stream
;
78 static gboolean
g_socket_connection_close (GIOStream
*stream
,
79 GCancellable
*cancellable
,
81 static void g_socket_connection_close_async (GIOStream
*stream
,
83 GCancellable
*cancellable
,
84 GAsyncReadyCallback callback
,
86 static gboolean
g_socket_connection_close_finish (GIOStream
*stream
,
90 G_DEFINE_TYPE_WITH_PRIVATE (GSocketConnection
, g_socket_connection
, G_TYPE_IO_STREAM
)
93 g_socket_connection_get_input_stream (GIOStream
*io_stream
)
95 GSocketConnection
*connection
= G_SOCKET_CONNECTION (io_stream
);
97 if (connection
->priv
->input_stream
== NULL
)
98 connection
->priv
->input_stream
= (GInputStream
*)
99 _g_socket_input_stream_new (connection
->priv
->socket
);
101 return connection
->priv
->input_stream
;
104 static GOutputStream
*
105 g_socket_connection_get_output_stream (GIOStream
*io_stream
)
107 GSocketConnection
*connection
= G_SOCKET_CONNECTION (io_stream
);
109 if (connection
->priv
->output_stream
== NULL
)
110 connection
->priv
->output_stream
= (GOutputStream
*)
111 _g_socket_output_stream_new (connection
->priv
->socket
);
113 return connection
->priv
->output_stream
;
117 * g_socket_connection_is_connected:
118 * @connection: a #GSocketConnection
120 * Checks if @connection is connected. This is equivalent to calling
121 * g_socket_is_connected() on @connection's underlying #GSocket.
123 * Returns: whether @connection is connected
128 g_socket_connection_is_connected (GSocketConnection
*connection
)
130 return g_socket_is_connected (connection
->priv
->socket
);
134 * g_socket_connection_connect:
135 * @connection: a #GSocketConnection
136 * @address: a #GSocketAddress specifying the remote address.
137 * @cancellable: (allow-none): a %GCancellable or %NULL
138 * @error: #GError for error reporting, or %NULL to ignore.
140 * Connect @connection to the specified remote address.
142 * Returns: %TRUE if the connection succeeded, %FALSE on error
147 g_socket_connection_connect (GSocketConnection
*connection
,
148 GSocketAddress
*address
,
149 GCancellable
*cancellable
,
152 g_return_val_if_fail (G_IS_SOCKET_CONNECTION (connection
), FALSE
);
153 g_return_val_if_fail (G_IS_SOCKET_ADDRESS (address
), FALSE
);
155 return g_socket_connect (connection
->priv
->socket
, address
,
159 static gboolean
g_socket_connection_connect_callback (GSocket
*socket
,
160 GIOCondition condition
,
164 * g_socket_connection_connect_async:
165 * @connection: a #GSocketConnection
166 * @address: a #GSocketAddress specifying the remote address.
167 * @cancellable: (allow-none): a %GCancellable or %NULL
168 * @callback: (scope async): a #GAsyncReadyCallback
169 * @user_data: (closure): user data for the callback
171 * Asynchronously connect @connection to the specified remote address.
173 * This clears the #GSocket:blocking flag on @connection's underlying
174 * socket if it is currently set.
176 * Use g_socket_connection_connect_finish() to retrieve the result.
181 g_socket_connection_connect_async (GSocketConnection
*connection
,
182 GSocketAddress
*address
,
183 GCancellable
*cancellable
,
184 GAsyncReadyCallback callback
,
188 GError
*tmp_error
= NULL
;
190 g_return_if_fail (G_IS_SOCKET_CONNECTION (connection
));
191 g_return_if_fail (G_IS_SOCKET_ADDRESS (address
));
193 task
= g_task_new (connection
, cancellable
, callback
, user_data
);
195 g_socket_set_blocking (connection
->priv
->socket
, FALSE
);
197 if (g_socket_connect (connection
->priv
->socket
, address
,
198 cancellable
, &tmp_error
))
200 g_task_return_boolean (task
, TRUE
);
201 g_object_unref (task
);
203 else if (g_error_matches (tmp_error
, G_IO_ERROR
, G_IO_ERROR_PENDING
))
207 g_error_free (tmp_error
);
208 source
= g_socket_create_source (connection
->priv
->socket
,
209 G_IO_OUT
, cancellable
);
210 g_task_attach_source (task
, source
,
211 (GSourceFunc
) g_socket_connection_connect_callback
);
212 g_source_unref (source
);
216 g_task_return_error (task
, tmp_error
);
217 g_object_unref (task
);
222 g_socket_connection_connect_callback (GSocket
*socket
,
223 GIOCondition condition
,
226 GTask
*task
= user_data
;
227 GSocketConnection
*connection
= g_task_get_source_object (task
);
228 GError
*error
= NULL
;
230 if (g_socket_check_connect_result (connection
->priv
->socket
, &error
))
231 g_task_return_boolean (task
, TRUE
);
233 g_task_return_error (task
, error
);
235 g_object_unref (task
);
240 * g_socket_connection_connect_finish:
241 * @connection: a #GSocketConnection
242 * @result: the #GAsyncResult
243 * @error: #GError for error reporting, or %NULL to ignore.
245 * Gets the result of a g_socket_connection_connect_async() call.
247 * Returns: %TRUE if the connection succeeded, %FALSE on error
252 g_socket_connection_connect_finish (GSocketConnection
*connection
,
253 GAsyncResult
*result
,
256 g_return_val_if_fail (G_IS_SOCKET_CONNECTION (connection
), FALSE
);
257 g_return_val_if_fail (g_task_is_valid (result
, connection
), FALSE
);
259 return g_task_propagate_boolean (G_TASK (result
), error
);
263 * g_socket_connection_get_socket:
264 * @connection: a #GSocketConnection
266 * Gets the underlying #GSocket object of the connection.
267 * This can be useful if you want to do something unusual on it
268 * not supported by the #GSocketConnection APIs.
270 * Returns: (transfer none): a #GSocketAddress or %NULL on error.
275 g_socket_connection_get_socket (GSocketConnection
*connection
)
277 g_return_val_if_fail (G_IS_SOCKET_CONNECTION (connection
), NULL
);
279 return connection
->priv
->socket
;
283 * g_socket_connection_get_local_address:
284 * @connection: a #GSocketConnection
285 * @error: #GError for error reporting, or %NULL to ignore.
287 * Try to get the local address of a socket connection.
289 * Returns: (transfer full): a #GSocketAddress or %NULL on error.
290 * Free the returned object with g_object_unref().
295 g_socket_connection_get_local_address (GSocketConnection
*connection
,
298 return g_socket_get_local_address (connection
->priv
->socket
, error
);
302 * g_socket_connection_get_remote_address:
303 * @connection: a #GSocketConnection
304 * @error: #GError for error reporting, or %NULL to ignore.
306 * Try to get the remote address of a socket connection.
308 * Returns: (transfer full): a #GSocketAddress or %NULL on error.
309 * Free the returned object with g_object_unref().
314 g_socket_connection_get_remote_address (GSocketConnection
*connection
,
317 return g_socket_get_remote_address (connection
->priv
->socket
, error
);
321 g_socket_connection_get_property (GObject
*object
,
326 GSocketConnection
*connection
= G_SOCKET_CONNECTION (object
);
331 g_value_set_object (value
, connection
->priv
->socket
);
335 G_OBJECT_WARN_INVALID_PROPERTY_ID (object
, prop_id
, pspec
);
340 g_socket_connection_set_property (GObject
*object
,
345 GSocketConnection
*connection
= G_SOCKET_CONNECTION (object
);
350 connection
->priv
->socket
= G_SOCKET (g_value_dup_object (value
));
354 G_OBJECT_WARN_INVALID_PROPERTY_ID (object
, prop_id
, pspec
);
359 g_socket_connection_constructed (GObject
*object
)
361 GSocketConnection
*connection
= G_SOCKET_CONNECTION (object
);
363 g_assert (connection
->priv
->socket
!= NULL
);
367 g_socket_connection_dispose (GObject
*object
)
369 GSocketConnection
*connection
= G_SOCKET_CONNECTION (object
);
371 connection
->priv
->in_dispose
= TRUE
;
373 G_OBJECT_CLASS (g_socket_connection_parent_class
)
376 connection
->priv
->in_dispose
= FALSE
;
380 g_socket_connection_finalize (GObject
*object
)
382 GSocketConnection
*connection
= G_SOCKET_CONNECTION (object
);
384 if (connection
->priv
->input_stream
)
385 g_object_unref (connection
->priv
->input_stream
);
387 if (connection
->priv
->output_stream
)
388 g_object_unref (connection
->priv
->output_stream
);
390 g_object_unref (connection
->priv
->socket
);
392 G_OBJECT_CLASS (g_socket_connection_parent_class
)
397 g_socket_connection_class_init (GSocketConnectionClass
*klass
)
399 GObjectClass
*gobject_class
= G_OBJECT_CLASS (klass
);
400 GIOStreamClass
*stream_class
= G_IO_STREAM_CLASS (klass
);
402 gobject_class
->set_property
= g_socket_connection_set_property
;
403 gobject_class
->get_property
= g_socket_connection_get_property
;
404 gobject_class
->constructed
= g_socket_connection_constructed
;
405 gobject_class
->finalize
= g_socket_connection_finalize
;
406 gobject_class
->dispose
= g_socket_connection_dispose
;
408 stream_class
->get_input_stream
= g_socket_connection_get_input_stream
;
409 stream_class
->get_output_stream
= g_socket_connection_get_output_stream
;
410 stream_class
->close_fn
= g_socket_connection_close
;
411 stream_class
->close_async
= g_socket_connection_close_async
;
412 stream_class
->close_finish
= g_socket_connection_close_finish
;
414 g_object_class_install_property (gobject_class
,
416 g_param_spec_object ("socket",
418 P_("The underlying GSocket"),
420 G_PARAM_CONSTRUCT_ONLY
|
422 G_PARAM_STATIC_STRINGS
));
426 g_socket_connection_init (GSocketConnection
*connection
)
428 connection
->priv
= g_socket_connection_get_instance_private (connection
);
432 g_socket_connection_close (GIOStream
*stream
,
433 GCancellable
*cancellable
,
436 GSocketConnection
*connection
= G_SOCKET_CONNECTION (stream
);
438 if (connection
->priv
->output_stream
)
439 g_output_stream_close (connection
->priv
->output_stream
,
441 if (connection
->priv
->input_stream
)
442 g_input_stream_close (connection
->priv
->input_stream
,
445 /* Don't close the underlying socket if this is being called
446 * as part of dispose(); when destroying the GSocketConnection,
447 * we only want to close the socket if we're holding the last
448 * reference on it, and in that case it will close itself when
449 * we unref it in finalize().
451 if (connection
->priv
->in_dispose
)
454 return g_socket_close (connection
->priv
->socket
, error
);
459 g_socket_connection_close_async (GIOStream
*stream
,
461 GCancellable
*cancellable
,
462 GAsyncReadyCallback callback
,
466 GIOStreamClass
*class;
469 class = G_IO_STREAM_GET_CLASS (stream
);
471 task
= g_task_new (stream
, cancellable
, callback
, user_data
);
473 /* socket close is not blocked, just do it! */
475 if (class->close_fn
&&
476 !class->close_fn (stream
, cancellable
, &error
))
477 g_task_return_error (task
, error
);
479 g_task_return_boolean (task
, TRUE
);
481 g_object_unref (task
);
485 g_socket_connection_close_finish (GIOStream
*stream
,
486 GAsyncResult
*result
,
489 return g_task_propagate_boolean (G_TASK (result
), error
);
493 GSocketFamily socket_family
;
494 GSocketType socket_type
;
496 GType implementation
;
500 connection_factory_hash (gconstpointer key
)
502 const ConnectionFactory
*factory
= key
;
505 h
= factory
->socket_family
^ (factory
->socket_type
<< 4) ^ (factory
->protocol
<< 8);
506 /* This is likely to be small, so spread over whole
507 hash space to get some distribution */
508 h
= h
^ (h
<< 8) ^ (h
<< 16) ^ (h
<< 24);
514 connection_factory_equal (gconstpointer _a
,
517 const ConnectionFactory
*a
= _a
;
518 const ConnectionFactory
*b
= _b
;
520 if (a
->socket_family
!= b
->socket_family
)
523 if (a
->socket_type
!= b
->socket_type
)
526 if (a
->protocol
!= b
->protocol
)
532 static GHashTable
*connection_factories
= NULL
;
533 G_LOCK_DEFINE_STATIC(connection_factories
);
536 * g_socket_connection_factory_register_type:
537 * @g_type: a #GType, inheriting from %G_TYPE_SOCKET_CONNECTION
538 * @family: a #GSocketFamily
539 * @type: a #GSocketType
540 * @protocol: a protocol id
542 * Looks up the #GType to be used when creating socket connections on
543 * sockets with the specified @family, @type and @protocol.
545 * If no type is registered, the #GSocketConnection base type is returned.
550 g_socket_connection_factory_register_type (GType g_type
,
551 GSocketFamily family
,
555 ConnectionFactory
*factory
;
557 g_return_if_fail (g_type_is_a (g_type
, G_TYPE_SOCKET_CONNECTION
));
559 G_LOCK (connection_factories
);
561 if (connection_factories
== NULL
)
562 connection_factories
= g_hash_table_new_full (connection_factory_hash
,
563 connection_factory_equal
,
564 (GDestroyNotify
)g_free
,
567 factory
= g_new0 (ConnectionFactory
, 1);
568 factory
->socket_family
= family
;
569 factory
->socket_type
= type
;
570 factory
->protocol
= protocol
;
571 factory
->implementation
= g_type
;
573 g_hash_table_insert (connection_factories
,
576 G_UNLOCK (connection_factories
);
580 init_builtin_types (void)
583 g_type_ensure (G_TYPE_UNIX_CONNECTION
);
585 g_type_ensure (G_TYPE_TCP_CONNECTION
);
589 * g_socket_connection_factory_lookup_type:
590 * @family: a #GSocketFamily
591 * @type: a #GSocketType
592 * @protocol_id: a protocol id
594 * Looks up the #GType to be used when creating socket connections on
595 * sockets with the specified @family, @type and @protocol_id.
597 * If no type is registered, the #GSocketConnection base type is returned.
604 g_socket_connection_factory_lookup_type (GSocketFamily family
,
608 ConnectionFactory
*factory
, key
;
611 init_builtin_types ();
613 G_LOCK (connection_factories
);
615 g_type
= G_TYPE_SOCKET_CONNECTION
;
617 if (connection_factories
)
619 key
.socket_family
= family
;
620 key
.socket_type
= type
;
621 key
.protocol
= protocol_id
;
623 factory
= g_hash_table_lookup (connection_factories
, &key
);
625 g_type
= factory
->implementation
;
628 G_UNLOCK (connection_factories
);
634 * g_socket_connection_factory_create_connection:
635 * @socket: a #GSocket
637 * Creates a #GSocketConnection subclass of the right type for
640 * Returns: (transfer full): a #GSocketConnection
645 g_socket_connection_factory_create_connection (GSocket
*socket
)
649 type
= g_socket_connection_factory_lookup_type (g_socket_get_family (socket
),
650 g_socket_get_socket_type (socket
),
651 g_socket_get_protocol (socket
));
652 return g_object_new (type
, "socket", socket
, NULL
);