| /* GIO - GLib Input, Output and Streaming Library |
| * |
| * Copyright (C) 2008 Red Hat, Inc. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General |
| * Public License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
| * Boston, MA 02111-1307, USA. |
| */ |
| |
| #include "config.h" |
| #include "gsocketconnectable.h" |
| #include "glibintl.h" |
| |
| |
| /** |
| * SECTION:gsocketconnectable |
| * @short_description: Interface for potential socket endpoints |
| * |
| * 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. |
| * |
| * |[ |
| * 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 ("www.gnome.org", 80); |
| * 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 the 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. |
| * |
| * Return value: (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 #GProxyAddress<!-- -->es for 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(). |
| * |
| * Return value: (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); |
| } |