public static byte[] BuildReadScreenResponse(ScreenContent ScreenContent)
{
var ra = new ByteArrayBuilder();
// data stream header.
{
var buf = DataStreamHeader.Build(50, TerminalOpcode.ReadScreen, 0, 0);
ra.Append(buf);
}
// screen regeneration buffer. each byte on the screen.
{
var buf = ScreenContent.GetRegenerationBuffer();
ra.Append(buf);
}
// update length of response data stream.
{
var wk = new ByteArrayBuilder();
wk.AppendBigEndianShort((short)ra.Length);
ra.CopyToBuffer(wk.ToByteArray(), 0);
}
// IAC EOR
{
ra.Append(EOR_Command.Build());
}
return(ra.ToByteArray());
}
/// <summary>
/// build the entire 5250 query response stream. Starting from data stream header
/// and concluding with IAC EOR.
/// </summary>
/// <returns></returns>
public static byte[] BuildQuery5250Response()
{
var ra = new ByteArrayBuilder();
// data stream header.
{
var buf = DataStreamHeader.Build(50, DataStreamOpcode.Noop, 0, 0);
ra.Append(buf);
}
// response header. send the special AID code - 0x88.
{
var buf = ResponseHeader.Build(0, 0, AidKey.Query5250Reply);
ra.Append(buf);
}
// build the 5250 query response.
{
byte byteZero = 0x00;
ra.AppendBigEndianShort(58); // LL. total length of structured field.
ra.Append(new byte[] { 0xd9, 0x70, 0x80 }); // 5250 query response
ra.Append(new byte[] { 0x06, 0x00 }); // control unit code.
ra.Append(new byte[] { 0x01, 0x03, 0x00 }); // code release level.
ra.Append(byteZero.Repeat(16)); // 16 bytes of null
ra.Append(0x01); // 01 - display station
ra.Append("3180002".ToEbcdicBytes()); // machine type and model.
ra.Append(0x02); // keyboard id
ra.Append(0x00); // extended keyboard id
ra.Append(0x00); // reserve
ra.Append(new byte[] { 0x00, 0x61, 0x50, 0x00 }); // device serial number.
ra.AppendBigEndianShort(256); // max number input fields.
ra.Append(0x00); // control unit customization
ra.Append(new byte[] { 0x00, 0x00 }); // reserved
ra.Append(new byte[] { 0x18, 0x11, 0x00, 0x00, 0x00 }); //
ra.Append(byteZero.Repeat(7)); // 7 bytes of null.
}
// update length of response data stream.
{
var wk = new ByteArrayBuilder();
wk.AppendBigEndianShort((short)ra.Length);
ra.CopyToBuffer(wk.ToByteArray(), 0);
}
// IAC EOR
{
ra.Append(EOR_Command.Build());
}
return(ra.ToByteArray());
}
public static byte[] BuildSaveScreenResponse(ScreenContent ScreenContent)
{
var ra = new ByteArrayBuilder();
// data stream header.
{
var buf = DataStreamHeader.Build(50, TerminalOpcode.SaveScreen, 0, 0);
ra.Append(buf);
}
// restore screen workstation command.
{
var cmd = new RestoreScreenCommand();
ra.Append(cmd.ToBytes());
}
// clear unit command.
if (ScreenContent.ScreenDim.GetIsWideScreen( ) == true)
{
var cmd = new ClearUnitAlternateCommand(0x00);
ra.Append(cmd.ToBytes());
}
else
{
var cmd = new ClearUnitCommand();
ra.Append(cmd.ToBytes());
}
// WTD command.
{
var ordersByteStream = ScreenContent.BuildOrderStream( );
var buf = WriteToDisplayCommand.Build(0x00, 0x18, ordersByteStream);
ra.Append(buf);
}
// update length of response data stream.
{
var wk = new ByteArrayBuilder();
wk.AppendBigEndianShort((short)ra.Length);
ra.CopyToBuffer(wk.ToByteArray(), 0);
}
// IAC EOR
{
ra.Append(EOR_Command.Build());
}
return(ra.ToByteArray());
}
private void BuildAndSendResponseDataStream(
AidKey AidKey, ScreenContent ScreenContent, TelnetLogList LogList = null)
{
// send response data stream up to the server.
{
var ra = BuildResponseByteStream(
ScreenContent,
AidKey, ScreenContent.CaretRowCol, ScreenContent.HowRead);
ra = ra.Append(EOR_Command.Build());
// send response stream back to server.
TelnetConnection.WriteToHost(LogList, ra, this.Client.GetStream());
// blank line in the log file.
var logItem = new LogListItem(Direction.Read, "", true);
this.LogList.AddItem(logItem);
}
}
/// <summary>
/// no longer used. called WorkstationCommandListExt.ProcessAndPaint, which
/// itself is not used.
/// </summary>
/// <param name="VisualItems"></param>
/// <param name="Caret"></param>
/// <returns></returns>
public static byte[] BuildSaveScreenResponse(
ScreenVisualItems VisualItems, CanvasPositionCursor Caret)
{
var ra = new ByteArrayBuilder();
// data stream header.
{
var buf = DataStreamHeader.Build(50, TerminalOpcode.SaveScreen, 0, 0);
ra.Append(buf);
}
// restore screen workstation command.
{
var cmd = new RestoreScreenCommand();
ra.Append(cmd.ToBytes());
}
// clear unit command.
{
var cmd = new ClearUnitCommand();
ra.Append(cmd.ToBytes());
}
// WTD command.
{
var ordersByteStream = VisualItems.BuildOrderStream(Caret);
var buf = WriteToDisplayCommand.Build(0x00, 0x18, ordersByteStream);
ra.Append(buf);
}
// update length of response data stream.
{
var wk = new ByteArrayBuilder();
wk.AppendBigEndianShort((short)ra.Length);
ra.CopyToBuffer(wk.ToByteArray(), 0);
}
// IAC EOR
{
ra.Append(EOR_Command.Build());
}
return(ra.ToByteArray());
}
