public override void HandleSocksRequest(ISocksClient clientToHandle)
{
logger.Trace($"Received new client request from {((IPEndPoint)(clientToHandle.Client.RemoteEndPoint)).Address}");
var socks4Request = Socks4Request.From(clientToHandle);
if (socks4Request.Header.RequestType == Socks4RequestType.TcpIpConnection)
{
logger.Notice($"Request command is TCP/IP connection to:{socks4Request.IpAddress} on:{socks4Request.Port}");
var connectionTarget = new IPEndPoint(socks4Request.IpAddress, socks4Request.Port);
try
{
logger.Notice("Trying to connect");
clientToHandle.Connect(connectionTarget);
}
catch (SocketException e)
{
logger.Error($"Connection to {socks4Request.IpAddress} on port {socks4Request.Port} thrown an exception:{Environment.NewLine}{e.Message}");
CloseConnectionAndSendError(clientToHandle, (uint)SocksCore.Socks4ErrorCodes.Error);
return;
}
}
if (socks4Request.Header.RequestType == Socks4RequestType.PortBinding)
{
throw new NotImplementedException();
// TODO: add port binding functionality
}
CloseConnectionAndSendError(clientToHandle, (uint)SocksCore.Socks4ErrorCodes.Error);
}
public static Socks4Request From(IByteReceiver receiver)
{
var structSize = Marshal.SizeOf(typeof(Socks4RequestHeader));
var requestHeader =
Socks4RequestHeaderFabric.FromHeader(receiver.Receive(structSize));
var userName = ReadUserName(receiver);
var socks4Request = new Socks4Request {
Header = requestHeader, UserName = userName
};
return(socks4Request);
}