private void ConfigureServer()
{
if (_socksServer != null)
{
_socksServer.Stop();
_socksServer = null;
}
if (Port.HasValue)
{
if (Port.Value > 0)
{
_socksServer = CreateListener(Port.Value);
}
else
{
for (; ;)
{
try
{
_socksServer = CreateListener(0);
_port = _socksServer.Port;
break;
}
catch (SocketException)
{
}
}
}
}
}
private Socks4 CreateListener(int listeningPort)
{
var server = new Socks4(listeningPort, ClientConnect);
server.OnSendData += OnSendData;
server.OnReceiveData += OnReceiveData;
server.Start();
return(server);
}
/// <summary>
/// Create a TcpClient using a TcpClientType Proxy.
/// </summary>
/// <param name="destination">The address destination. Where to CONNECT</param>
/// <param name="type">The Proxy Type</param>
/// <param name="userId">A string used with socks 4</param>
/// <returns></returns>
public TcpClient CreateTcpClient(SocketAddress destination, TcpClientType type, string userId = "")
{
if (destination == null)
{
throw new ArgumentNullException(nameof(destination), $"{nameof(destination)} must be not null");
}
var socket = new Socket(SocketType.Stream, ProtocolType.Tcp);
socket.Connect(ProxyAddress.Host, ProxyAddress.Port);
try
{
if (type == TcpClientType.SOCKS4)
{
var socks = new Socks4(Resolver);
socks.CreateTunnel(socket, destination, userId);
}
else if (type == TcpClientType.SOCKS4a)
{
var socks = new Socks4a(Resolver);
socks.CreateTunnel(socket, destination, userId);
}
else
{
var socks = new Socks5(Resolver);
socks.CreateTunnel(socket, destination, ProxyCredential);
}
}
catch (Exception e)
{
if (socket != null && socket.Connected)
{
socket.Close();
}
throw e;
}
return(new TcpClient()
{
Client = socket
});
}
