public void ReadNetwork()
{
byte[] buffer = new byte[10];
int received = 0;
StreamReader reader = new StreamReader(stream);
while (ConnectionSocket.Poll(0, SelectMode.SelectRead))
{
try
{
received = ConnectionSocket.Receive(buffer, buffer.Length, SocketFlags.None);
}catch (SocketException) {
ConnectionSocket.Close();
Interpreter.Shutdown();
break;
}
if (received == 0)
{
ConnectionSocket.Close();
Interpreter.Shutdown();
return;
}
for (int x = 0; x < received; x++)
{
byte b = buffer[x];
switch (status)
{
case TelnetStatus.standard:
if (b == 255)
{
status = TelnetStatus.awaitCommand;
}
else
{
stream.WriteByte(b);
}
break;
case TelnetStatus.awaitCommand:
AcceptCommand(b);
break;
case TelnetStatus.opNegotiation:
if (b == 240)
{
status = TelnetStatus.standard;
}
break;
case TelnetStatus.awaitOption:
option = b;
//deal with option here
status = TelnetStatus.standard;
break;
}
}
}
stream.Seek(0, SeekOrigin.Begin);
while (!reader.EndOfStream)
{
string line = reader.ReadLine();
Interpreter.HandleInput(line);
}
stream.SetLength(0);
}
void AcceptCommand(byte command)
{
switch (command)
{
case 255: //escaped 255
stream.WriteByte(command);
status = TelnetStatus.standard;
break;
case 240: //shouldn't get this
break;
case 241: //nop
break;
case 242:
break;
case 243: //break
break;
case 244: //IP
break;
case 245: //AO
break;
case 246: //AYT(ARE YOU THERE(PING)
lock (lockObject)
{
try
{
ConnectionSocket.Send(new byte[] { 255, 246 });
}catch (SocketException) {
ConnectionSocket.Close();
Interpreter.Shutdown();
}
status = TelnetStatus.standard;
}
break;
case 247:
break;
case 248:
break;
case 249:
break;
case 250:
status = TelnetStatus.opNegotiation;
break;
case 251:
this.Command = command;
status = TelnetStatus.awaitOption;
break;
case 252:
this.Command = command;
status = TelnetStatus.awaitOption;
break;
case 253:
this.Command = command;
status = TelnetStatus.awaitOption;
break;
case 254:
this.Command = command;
status = TelnetStatus.awaitOption;
break;
}
}
