/// <summary>
/// construct an OptionVariable starting at the next byte in the input array.
/// </summary>
/// <param name="ByteArray"></param>
/// <returns></returns>
public static OptionVariable Construct(InputByteArray InputArray)
{
OptionVariable optnVar = null;
if (InputArray.IsEof() == false)
{
var b1 = InputArray.PeekNextByte();
var ev = b1.ToEnvironVarCode();
if (ev != null)
{
var varCode = ev.Value;
if ((varCode == EnvironVarCode.VAR) || (varCode == EnvironVarCode.USERVAR))
{
byte[] valueBytes = null;
bool gotValue = false;
// advance past the VAR or USERVAR code.
InputArray.GetNextByte();
// isolate the name text which follows the VAR or USERVAR code.
// ( return the stop code. But do not consume it. )
var rv = InputArray.GetBytesUntilCode(
new byte[] { 0xff, 0x00, 0x01, 0x02, 0x03 });
var nameBytes = rv.Item1;
var endAccumCode = rv.Item2.ToEnvironVarCode();
// the name text ends with VALUE marker. The text that follows is the text value
// of the variable.
if ((endAccumCode != null) && (endAccumCode.Value == EnvironVarCode.VALUE))
{
gotValue = true;
// advance past the VALUE var code.
InputArray.GetNextByte();
// get the value bytes until end of value code.
var rv2 = InputArray.GetBytesUntilCode(
new byte[] { 0xff, 0x00, 0x01, 0x02, 0x03 });
valueBytes = rv2.Item1;
}
optnVar = new OptionVariable(varCode, nameBytes, valueBytes);
if (gotValue == true)
{
optnVar.ValueEmpty = true;
}
}
}
}
return(optnVar);
}
public static Tuple <TerminalVt100Statement, Vt100OutputText> Factory(
InputByteArray InputArray)
{
TerminalVt100Statement stmt = null;
Vt100OutputText otStmt = null;
var escapeCmd = InputArray.PeekNextByte().ToTelnetCommand();
Vt100Command?cmd = null;
if ((escapeCmd != null) && (escapeCmd.Value == TelnetCommand.ESCAPE) &&
(InputArray.RemainingLength > 1))
{
InputArray.AdvanceIndex(1);
var rv = InputArray.GetBytesUntilCode(new byte[] { 0x1b });
var buf = rv.Item1;
int rx = 0;
var stmtText = buf.ToAscii();
stmt = Factory_FromStmtText(stmtText);
// process any output text that follows the stmt text.
{
int lx = stmt.StmtText.Length;
if (stmtText.Length > lx)
{
stmtText = stmtText.Substring(lx);
otStmt = new Vt100OutputText(stmtText);
}
}
}
return(new Tuple <TerminalVt100Statement, Vt100OutputText>(stmt, otStmt));
}
public TerminalTypeCommand(InputByteArray InputArray, CommandCode CmdCode)
: base(InputArray, CmdCode, TelnetSubject.TerminalType)
{
this.SubOption = null;
this.EndFound = false;
// statement contains additional parameters.
if (this.CmdCode == CommandCode.SB)
{
var b1 = InputArray.GetNextByte();
this.SubOption = b1.ToTelnetOptionParm();
this.RawBytes.Append(b1);
if ((this.SubOption != null) &&
(this.SubOption.Value == TelnetOptionParm.IS))
{
var rv = InputArray.GetBytesUntilCode(new byte[] { 0xff });
this.TerminalNameBytes = rv.Item1;
this.RawBytes.Append(this.TerminalNameBytes);
}
// parse the closing IAC SE
ParseClosingSE(InputArray);
}
}