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 void AcceptClientConnection(ISocksClient client /*Socket client*/)
{
var socksVersionFromClientRequest = SocksVersion.Unknown;
socksVersionFromClientRequest = FromRequest(client);
switch (socksVersionFromClientRequest)
{
case SocksVersion.Unknown:
CloseConnectionAndSendError(client, DefaultSocksError);
break;
case SocksVersion.Socks4:
socks4ClientHandler.HandleSocksRequest(client);
break;
case SocksVersion.Socks5:
socks5ClientHandler.HandleSocksRequest(client);
break;
default:
CloseConnectionAndSendError(client, DefaultSocksError);
break;
}
}
public virtual void CloseConnectionAndSendError(ISocksClient connectionToClose, uint errorCode)
{
var errorArray = BitConverter.GetBytes(errorCode);
try
{
connectionToClose.Send(errorArray);
}
finally
{
connectionToClose.Close();
}
}
protected virtual void OnNewSocksClientConnected(ISocksClient e)
{
NewSocksClientConnected?.Invoke(this, e);
}
public void CloseConnectionAndSendError(ISocksClient connectionToClose, uint errorCode)
{
connectionToClose.Close();
// throw new NotImplementedException();
}
public abstract void HandleSocksRequest(ISocksClient clientToHandle);