public TelnetSymbol(TelnetCommands myCommand, TelnetOptions myOption)
{
_Command = myCommand;
_Option = myOption;
_TelnetSymbolType = TelnetSymbolTypes.Command;
}
public TelnetSymbol(TelnetCommands myCommand, TelnetOptions myOption)
{
_Command = myCommand;
_Option = myOption;
_TelnetSymbolType = TelnetSymbolTypes.Command;
}
public TelnetSymbol(Byte[] myDataBytes)
{
_Data = myDataBytes;
_TelnetSymbolType = TelnetSymbolTypes.Data;
}
public TelnetSymbol(TelnetCommands myCommand)
{
_Command = myCommand;
_TelnetSymbolType = TelnetSymbolTypes.Command;
}
public Boolean Parse(Byte[] myBytes)
{
//List<TelnetSymbol> resolvedSymbols = new List<TelnetSymbol>();
TelnetSymbolTypes lastByteType = TelnetSymbolTypes.Unknown;
List <Byte> dataBytes = new List <byte>();
List <Byte> subnegotiationBytes = new List <byte>();
for (Int32 i = 0; i < myBytes.Length; i++)
{
//As required by the Telnet protocol, any occurrence of 255 in the subnegotiation must be doubled to distinguish it from the IAC character (which has a value of 255)
if (myBytes[i] == (Byte)TelnetCommands.Iac || lastByteType == TelnetSymbolTypes.Subnegotiation)
{
if (lastByteType == TelnetSymbolTypes.Data)
{
HandleData(dataBytes.ToArray());
HandleKeys(dataBytes.ToArray());
dataBytes.Clear();
}
#region Read the next command or subnegotiation data
TelnetCommands command;
if (lastByteType == TelnetSymbolTypes.Subnegotiation)
{
command = (TelnetCommands)myBytes[i];
}
else
{
command = (TelnetCommands)myBytes[++i];
}
if (lastByteType == TelnetSymbolTypes.Subnegotiation)
{
if (command != TelnetCommands.Iac || myBytes[i + 1] != (Byte)TelnetCommands.SubnegotiationEnd)
{
Console.Write(myBytes[i] + ", ");
subnegotiationBytes.Add(myBytes[i]);
//As required by the Telnet protocol, any occurrence of 255 in the subnegotiation must be doubled to distinguish it from the IAC character (which has a value of 255)
if (command == TelnetCommands.Iac && i + 1 < myBytes.Length && myBytes[i + 1] == (Byte)TelnetCommands.Iac)
{
i++;
}
continue;
}
else
{
command = (TelnetCommands)myBytes[++i];
}
}
#endregion
switch (command)
{
#region Subnegotiation
case TelnetCommands.Subnegotiation:
//throw new NotImplementedException("TelnetCommands.Subnegotiation");
Console.WriteLine("TelnetCommands.Subnegotiation");
subnegotiationBytes.Clear();
lastByteType = TelnetSymbolTypes.Subnegotiation;
break;
case TelnetCommands.SubnegotiationEnd:
//throw new NotImplementedException("TelnetCommands.SubnegotiationEnd");
Console.WriteLine("TelnetCommands.SubnegotiationEnd");
HandleSubnegotiation(subnegotiationBytes.ToArray());
lastByteType = TelnetSymbolTypes.Unknown;
break;
#endregion
#region Simple commands without option
case TelnetCommands.NoOperation:
case TelnetCommands.DataMark:
case TelnetCommands.Break:
case TelnetCommands.InterruptProcess:
case TelnetCommands.AbortOutput:
case TelnetCommands.AreYouThere:
case TelnetCommands.EraseCharacter:
case TelnetCommands.EraseLine:
case TelnetCommands.GoAhead:
//resolvedSymbols.Add(new TelnetSymbol(command));
lastByteType = TelnetSymbolTypes.Command;
HandleTelnetCommand(new TelnetSymbol(command));
break;
#endregion
#region Option commands
case TelnetCommands.Will:
case TelnetCommands.Wont:
case TelnetCommands.Do:
case TelnetCommands.Dont:
TelnetOptions option = (TelnetOptions)myBytes[++i];
//resolvedSymbols.Add(new TelnetSymbol(command, option));
lastByteType = TelnetSymbolTypes.Command;
HandleTelnetOption(new TelnetSymbol(command, option));
break;
#endregion
default:
throw new NotSupportedException("Not supported command: " + command);
}
}
else
{
lastByteType = TelnetSymbolTypes.Data;
//if (myBytes[i] != (Byte)ASCIIControlCodes.CR && myBytes[i] != (Byte)ASCIIControlCodes.LF)
dataBytes.Add(myBytes[i]);
}
}
if (lastByteType == TelnetSymbolTypes.Data && dataBytes.Count > 0)
{
HandleData(dataBytes.ToArray());
HandleKeys(dataBytes.ToArray());
}
return(true);
}
public TelnetSymbol(Byte[] myDataBytes)
{
_Data = myDataBytes;
_TelnetSymbolType = TelnetSymbolTypes.Data;
}
public TelnetSymbol(TelnetCommands myCommand)
{
_Command = myCommand;
_TelnetSymbolType = TelnetSymbolTypes.Command;
}