public static TcpClient ConnectTcpClientTo(IPAddress proxyAddress, short proxyPort, IPAddress destAddress, short destPort, string asciiUserId, int timeout)
{
// create the socket
var socket = new TcpClient(AddressFamily.InterNetwork);
socket.ReceiveTimeout = timeout;
socket.SendTimeout = timeout;
// connect to the proxy
socket.Connect(new IPEndPoint(proxyAddress, proxyPort));
// create the request
var requestPacket = new Socks4Request(1, destPort, destAddress, asciiUserId);
// Get the request
var requestData = requestPacket.GetBytes();
// Send the request
socket.GetStream().Write(requestData, 0, requestData.Length);
// Get the response from teh socket
var response = new Socks4Response(socket);
if (response.Version != 0)
{
// Unexpected version (must be 0)
throw new Socks4Exception(string.Format("Invalid version. Expected 0, got {0}.", response.Version));
}
if (response.Command < (byte)Socks4ResponseCommand.MinValue || response.Command > (byte)Socks4ResponseCommand.MaxValue)
{
// Invalid response command
throw new Socks4Exception(string.Format("Invalid reply command. Got {0}.", response.Command));
}
if (response.Command != (byte)Socks4ResponseCommand.Granted)
{
// Request failed
throw new Socks4Exception((Socks4ResponseCommand)response.Command);
}
// Connection made! Return the socket.
return socket;
}
public static System.Net.Sockets.Socket ConnectSocketTo(IPAddress proxyAddress, short proxyPort, IPAddress destAddress, short destPort, string asciiUserId)
{
// create the socket
var socket = new System.Net.Sockets.Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// connect to the proxy
socket.Connect(new IPEndPoint(proxyAddress, proxyPort));
// create the request
var requestPacket = new Socks4Request(1, destPort, destAddress, asciiUserId);
// Send the request
socket.Send(requestPacket.GetBytes());
// Get the response from teh socket
var response = new Socks4Response(socket);
if (response.Version != 0)
{
// Unexpected version (must be 0)
throw new Socks4Exception(string.Format("Invalid version. Expected 0, got {0}.", response.Version));
}
if (response.Command < (byte)Socks4ResponseCommand.MinValue || response.Command > (byte)Socks4ResponseCommand.MaxValue)
{
// Invalid response command
throw new Socks4Exception(string.Format("Invalid reply command. Got {0}.", response.Command));
}
if (response.Command != (byte)Socks4ResponseCommand.Granted)
{
// Request failed
throw new Socks4Exception((Socks4ResponseCommand)response.Command);
}
// Connection made! Return the socket.
return socket;
}