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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2008 Red Hat, Inc.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gsocketconnectable.h"
#include "glibintl.h"
/**
* SECTION:gsocketconnectable
* @short_description: Interface for potential socket endpoints
* @include: gio/gio.h
*
* Objects that describe one or more potential socket endpoints
* implement #GSocketConnectable. Callers can then use
* g_socket_connectable_enumerate() to get a #GSocketAddressEnumerator
* to try out each socket address in turn until one succeeds, as shown
* in the sample code below.
*
* |[<!-- language="C" -->
* MyConnectionType *
* connect_to_host (const char *hostname,
* guint16 port,
* GCancellable *cancellable,
* GError **error)
* {
* MyConnection *conn = NULL;
* GSocketConnectable *addr;
* GSocketAddressEnumerator *enumerator;
* GSocketAddress *sockaddr;
* GError *conn_error = NULL;
*
* addr = g_network_address_new (hostname, port);
* enumerator = g_socket_connectable_enumerate (addr);
* g_object_unref (addr);
*
* // Try each sockaddr until we succeed. Record the first connection error,
* // but not any further ones (since they'll probably be basically the same
* // as the first).
* while (!conn && (sockaddr = g_socket_address_enumerator_next (enumerator, cancellable, error))
* {
* conn = connect_to_sockaddr (sockaddr, conn_error ? NULL : &conn_error);
* g_object_unref (sockaddr);
* }
* g_object_unref (enumerator);
*
* if (conn)
* {
* if (conn_error)
* {
* // We couldn't connect to the first address, but we succeeded
* // in connecting to a later address.
* g_error_free (conn_error);
* }
* return conn;
* }
* else if (error)
* {
* /// Either initial lookup failed, or else the caller cancelled us.
* if (conn_error)
* g_error_free (conn_error);
* return NULL;
* }
* else
* {
* g_error_propagate (error, conn_error);
* return NULL;
* }
* }
* ]|
*/
typedef GSocketConnectableIface GSocketConnectableInterface;
G_DEFINE_INTERFACE (GSocketConnectable, g_socket_connectable, G_TYPE_OBJECT)
static void
g_socket_connectable_default_init (GSocketConnectableInterface *iface)
{
}
/**
* g_socket_connectable_enumerate:
* @connectable: a #GSocketConnectable
*
* Creates a #GSocketAddressEnumerator for @connectable.
*
* Returns: (transfer full): a new #GSocketAddressEnumerator.
*
* Since: 2.22
*/
GSocketAddressEnumerator *
g_socket_connectable_enumerate (GSocketConnectable *connectable)
{
GSocketConnectableIface *iface;
g_return_val_if_fail (G_IS_SOCKET_CONNECTABLE (connectable), NULL);
iface = G_SOCKET_CONNECTABLE_GET_IFACE (connectable);
return (* iface->enumerate) (connectable);
}
/**
* g_socket_connectable_proxy_enumerate:
* @connectable: a #GSocketConnectable
*
* Creates a #GSocketAddressEnumerator for @connectable that will
* return a #GProxyAddress for each of its addresses that you must connect
* to via a proxy.
*
* If @connectable does not implement
* g_socket_connectable_proxy_enumerate(), this will fall back to
* calling g_socket_connectable_enumerate().
*
* Returns: (transfer full): a new #GSocketAddressEnumerator.
*
* Since: 2.26
*/
GSocketAddressEnumerator *
g_socket_connectable_proxy_enumerate (GSocketConnectable *connectable)
{
GSocketConnectableIface *iface;
g_return_val_if_fail (G_IS_SOCKET_CONNECTABLE (connectable), NULL);
iface = G_SOCKET_CONNECTABLE_GET_IFACE (connectable);
if (iface->proxy_enumerate)
return (* iface->proxy_enumerate) (connectable);
else
return (* iface->enumerate) (connectable);
}
/**
* g_socket_connectable_to_string:
* @connectable: a #GSocketConnectable
*
* Format a #GSocketConnectable as a string. This is a human-readable format for
* use in debugging output, and is not a stable serialization format. It is not
* suitable for use in user interfaces as it exposes too much information for a
* user.
*
* If the #GSocketConnectable implementation does not support string formatting,
* the implementation’s type name will be returned as a fallback.
*
* Returns: (transfer full): the formatted string
*
* Since: 2.48
*/
gchar *
g_socket_connectable_to_string (GSocketConnectable *connectable)
{
GSocketConnectableIface *iface;
g_return_val_if_fail (G_IS_SOCKET_CONNECTABLE (connectable), NULL);
iface = G_SOCKET_CONNECTABLE_GET_IFACE (connectable);
if (iface->to_string != NULL)
return iface->to_string (connectable);
else
return g_strdup (G_OBJECT_TYPE_NAME (connectable));
}
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