lib/csharp/src/Transport/TSocketVersionizer.cs

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Sockets;
using System.Reflection;
using System.Text;

namespace Thrift.Transport
{
    /**
    * PropertyInfo for the DualMode property of the System.Net.Sockets.Socket class. Used to determine if the sockets are capable of
    * automatic IPv4 and IPv6 handling. If DualMode is present the sockets automatically handle IPv4 and IPv6 connections.
    * If the DualMode is not available the system configuration determines whether IPv4 or IPv6 is used.
    */
    internal static class TSocketVersionizer
    {
        /*
        * PropertyInfo for the DualMode property of System.Net.Sockets.Socket.
        */
        private static PropertyInfo DualModeProperty = typeof(Socket).GetProperty("DualMode");

        /*
        * Indicates whether the used framework supports DualMode on sockets or not.
        */
        internal static Boolean SupportsDualMode
        {
            get
            {
                return TSocketVersionizer.DualModeProperty != null;
            }
        }

        /*
        * Creates a TcpClient according to the capabilitites of the used framework
        */
        internal static TcpClient CreateTcpClient()
        {
            TcpClient client = null;

            if (TSocketVersionizer.SupportsDualMode)
            {
                client = new TcpClient(AddressFamily.InterNetworkV6);
                TSocketVersionizer.DualModeProperty.SetValue(client.Client, true);
            }
            else
            {
                client = new TcpClient(AddressFamily.InterNetwork);
            }

            return client;
        }

        /*
        * Creates a TcpListener according to the capabilitites of the used framework
        */
        internal static TcpListener CreateTcpListener(Int32 port)
        {
            TcpListener listener = null;

            if (TSocketVersionizer.SupportsDualMode)
            {
                listener = new TcpListener(System.Net.IPAddress.IPv6Any, port);
                TSocketVersionizer.DualModeProperty.SetValue(listener.Server, true);
            }
            else
            {
                listener = new TcpListener(System.Net.IPAddress.Any, port);
            }

            return listener;
        }
    }
}