private bool SendSubNegotiation(int option, byte[] data)
{
byte[] SubNegotiationCommand;
SubNegotiationCommand = TelnetHelper.GetSubNegotiationCommand(option, data);
return(telnetClient.SendData(SubNegotiationCommand));
}
private bool SendCommand(int negotiation, int option)
{
byte[] sendData;
sendData = TelnetHelper.GetCommand(negotiation, option);
return(telnetClient.SendData(sendData));
}
// Possibly needs to be rewritten
private void DisplayReceivedData(byte[] data, int dataLength)
{
for (int i = 0; i < dataLength; ++i)
{
byte dataByte = data[i];
if (dataByte != 0)
{
if (dataByte == TelnetHelper.SB)
{
Console.Write("SB: ");
}
else if (dataByte == TelnetHelper.SE)
{
Console.Write("SE: ");
}
else if (dataByte == TelnetHelper.WILL)
{
Console.Write("WILL: ");
}
else if (dataByte == TelnetHelper.WONT)
{
Console.Write("WON'T: ");
}
else if (dataByte == TelnetHelper.DO)
{
Console.Write("DO: ");
}
else if (dataByte == TelnetHelper.DONT)
{
Console.Write("DON'T: ");
}
else if (dataByte == TelnetHelper.IAC)
{
Console.Write("\nIAC ");
}
else if (dataByte == TelnetHelper.ESC)
{
Console.Write("\nESC: ");
}
else // Get Option Description of Command
{
Console.Write(TelnetHelper.GetOptionDescription(dataByte) + " "); //dataByte.ToString("X")
}
}
}
Console.WriteLine();
}
// If you want to add additional IAC responses add it in this method
private int ProcessIAC(byte[] dataBytes, int dataLength, int i)
{
// IAC Negotiation Option
byte negotiation = dataBytes[i + 1];
byte option = dataBytes[i + 2];
if (negotiation == TelnetHelper.DO)
{
Console.WriteLine("DO= " + dataBytes[i + 3].ToString("X"));
if (TelnetHelper.GetOptionDescription(option) == "Echo")
{
SendCommand(TelnetHelper.WILL, 0x01);
}
else if (TelnetHelper.GetOptionDescription(option) == "Suppress Go Ahead")
{
SendCommand(TelnetHelper.WILL, 0x03);
}
else if (TelnetHelper.GetOptionDescription(option) == "Terminal Type")
{
SendCommand(TelnetHelper.WILL, 0x18);
}
else if (TelnetHelper.GetOptionDescription(option) == "Terminal Speed")
{
SendCommand(TelnetHelper.WILL, 0x20);
}
else if (TelnetHelper.GetOptionDescription(option) == "X Display Location")
{
SendCommand(TelnetHelper.WONT, 0x23); // Won't display X Location
}
else if (TelnetHelper.GetOptionDescription(option) == "New Environment Option")
{
SendCommand(TelnetHelper.WILL, 0x27);
}
else if (TelnetHelper.GetOptionDescription(option) == "Negotiate About Window Size")
{
SendCommand(TelnetHelper.WILL, 0x1F);
}
i += 2;
}
else if (negotiation == TelnetHelper.SB)
{
Console.WriteLine("SB= " + dataBytes[i + 3].ToString("X"));
if (TelnetHelper.GetOptionDescription(option) == "Terminal Type")
{
SendSubNegotiation(option, encoder.GetBytes("\0XTERM"));
}
else if (TelnetHelper.GetOptionDescription(option) == "Terminal Speed")
{
SendSubNegotiation(option, encoder.GetBytes("\038400,38400"));
}
else if (TelnetHelper.GetOptionDescription(option) == "New Environment Option")
{
SendSubNegotiation(option, encoder.GetBytes("\0"));
}
i += 3;
}
return(i);
}
