ParseDataStream(
InputByteArray inputArray, SessionSettings sessionSettings,
string DataStreamName, TypeTelnetDevice?TypeDevice = null)
{
var accumCmdList = new WorkstationCommandList();
var responseItemList = new ResponseItemList();
TelnetCommandList telList = null;
ResponseHeader curRespHeader = null;
ResponseHeader nextRespHeader = null;
DataStreamHeader dsh = null;
ControlFunctionList funcList = null;
bool didParse = true;
while ((didParse == true) && (inputArray.RemainingLength > 0))
{
didParse = false;
curRespHeader = nextRespHeader;
nextRespHeader = null;
if ((didParse == false) && (dsh == null))
{
var telCmd = inputArray.NextTelnetCommand();
if (telCmd != null)
{
if (telList == null)
{
telList = new TelnetCommandList();
}
telList.Add(telCmd);
var s1 = telCmd.ToString();
didParse = true;
}
}
// parse the data stream header.
if ((didParse == false) && (dsh == null))
{
var code = inputArray.PeekDataStreamCode();
if (code != null)
{
var rv = DataStreamHeader.Factory(inputArray);
dsh = rv.Item1;
didParse = true;
// update the type of device depending on data stream header stream
// code.
if ((TypeDevice == null) && (dsh != null) && (dsh.Errmsg == null))
{
TypeDevice = dsh.StreamCode.ToTypeTelnetDevice();
}
}
}
// parse as a sequence of workstation commands.
if (didParse == false)
{
if ((TypeDevice == null) || (TypeDevice.Value != TypeTelnetDevice.Printer))
{
var rv = Process5250.ParseWorkstationCommandList(
inputArray, sessionSettings);
var anotherDsh = rv.Item1;
var wrkstnCmdList = rv.Item2;
if ((anotherDsh != null) && (anotherDsh.Errmsg == null))
{
didParse = true;
dsh = anotherDsh;
}
// draw the fields and literals on the canvas.
if (wrkstnCmdList?.Count > 0)
{
accumCmdList.Append(wrkstnCmdList);
didParse = true;
}
}
}
// parse as sequence of SCS control functions. ( printer data stream ).
if (didParse == false)
{
if ((TypeDevice == null) || (TypeDevice.Value == TypeTelnetDevice.Printer))
{
var rv = ControlFunctionList.ParseDataStream(inputArray);
if (rv.Item1?.Count > 0)
{
didParse = true;
funcList = rv.Item1;
}
}
}
// parse as response stream header.
if ((didParse == false) &&
(ResponseHeader.IsResponseHeader(inputArray).Item1 == true))
{
curRespHeader = new ResponseHeader(inputArray);
didParse = true;
responseItemList.Add(curRespHeader);
var rv = Response5250.ParseResponseStream(inputArray, curRespHeader);
responseItemList.Append(rv.Item1);
}
}
return(new Tuple <WorkstationCommandList, ResponseItemList,
DataStreamHeader, TelnetCommandList, ControlFunctionList>(
accumCmdList, responseItemList, dsh, telList, funcList));
}
/// <summary>
/// parse the 5250 data stream that is sent from the client to the server.
/// </summary>
/// <param name="LogFile"></param>
/// <param name="ToServerStream"></param>
/// <returns></returns>
public static Tuple <ResponseItemList, string> ParseResponseStream(
InputByteArray InputArray, ResponseHeader ResponseHeader = null)
{
var responseItemList = new ResponseItemList();
string errmsg = null;
var writeStream = new ByteArrayBuilder();
DataStreamHeader dsHeader = null;
ResponseHeader responseHeader = ResponseHeader;
// stream starts with data stream header.
if (responseHeader == null)
{
var rv = DataStreamHeader.Factory(InputArray);
dsHeader = rv.Item1;
responseItemList.Add(dsHeader);
errmsg = dsHeader.Errmsg;
// next is the response header.
if (errmsg == null)
{
responseHeader = new ResponseHeader(InputArray);
responseItemList.Add(responseHeader);
errmsg = responseHeader.Errmsg;
}
}
// look for 5250 query reply.
if ((errmsg == null) && (responseHeader.AidKey != null) &&
(responseHeader.AidKey.Value == AidKey.Query5250Reply))
{
var queryResp = new Query5250Response(InputArray);
if (queryResp.Errmsg == null)
{
responseItemList.Add(queryResp);
}
}
// repeating instances of sbaOrder, textDataOrder pairs.
while (true)
{
var telCmd = TelnetCommand.Factory(InputArray);
if (telCmd != null)
{
continue;
}
// check that an SBA order is starting. Leave loop when it is not.
if (SetBufferAddressOrder.CheckOrder(InputArray) != null)
{
break;
}
var orderPair = new LocatedTextDataOrderPair(InputArray);
if (orderPair.Errmsg != null)
{
break;
}
responseItemList.Add(orderPair);
}
return(new Tuple <ResponseItemList, string>(responseItemList, errmsg));
}
/// <summary>
/// write buffer contents to log file.
/// </summary>
/// <param name="Direction"></param>
/// <param name="Buffer"></param>
/// <param name="Length"></param>
public void Write(string Direction, byte[] Buffer, int Length)
{
lock (this.LockFlag)
{
this.Counter += 1;
if (this.Counter > 7)
{
int cc = 3;
}
InputByteArray inputArray = new InputByteArray(Buffer, Length);
while (inputArray.IsEof() == false)
{
TelnetStatement stmt = null;
var escapeCmd = inputArray.PeekNextByte().ToTelnetCommand();
var dsHeader = DataStreamHeader.Factory(inputArray);
IBM5250DataStreamCommand dataStreamCommand;
if (dsHeader != null)
{
var s1 = dsHeader.ToString();
System.IO.File.AppendAllText(
FilePath, Direction + " " + this.Counter.ToString() + " "
+ s1 + Environment.NewLine);
this.CurrentDataStreamHeader = dsHeader;
continue;
}
// an ibm 5250 data stream command.
else if ((this.CurrentDataStreamHeader != null) &&
((dataStreamCommand = IBM5250DataStreamCommand.Factory(inputArray))
!= null))
{
var s1 = dataStreamCommand.ToString();
System.IO.File.AppendAllText(
FilePath, Direction + " " + this.Counter.ToString() + " "
+ s1 + Environment.NewLine);
continue;
}
else if ((stmt = TelnetStatement.Factory(inputArray)) != null)
{
var s1 = stmt.ToString();
System.IO.File.AppendAllText(
FilePath, Direction + " " + this.Counter.ToString() + " "
+ s1 + Environment.NewLine);
continue;
}
else if ((escapeCmd != null) && (escapeCmd.Value == TelnetCommand.ESCAPE))
{
var rv = TerminalVt100Statement.Factory(inputArray);
var vtStmt = rv.Item1;
var otStmt = rv.Item2;
System.IO.File.AppendAllText(
this.FilePath, Direction + " " + this.Counter.ToString() + " "
+ vtStmt.ToString() + Environment.NewLine);
if (otStmt != null)
{
System.IO.File.AppendAllText(
this.FilePath, Direction + " " + this.Counter.ToString() + " "
+ otStmt.ToString() + Environment.NewLine);
}
continue;
}
else
{
var remBytes = inputArray.GetBytesToEnd();
System.IO.File.AppendAllText(
this.FilePath, Direction + " " + this.Counter.ToString()
+ " Raw bytes follow:" + Environment.NewLine);
LogFile_WriteRawBytes(remBytes, this.FilePath);
}
}
}
}
/// <summary>
/// write buffer contents to log file.
/// </summary>
/// <param name="Direction"></param>
/// <param name="Buffer"></param>
/// <param name="Length"></param>
public void Write(string Direction, byte[] Buffer, int Length)
{
var lines = new List <string>();
this.Counter += 1;
var inputArray = new InputByteArray(Buffer, Length);
while (inputArray.IsEof() == false)
{
// peek to see if the current byte is a telnet command.
var escapeCmd = inputArray.PeekNextByte().ToTelnetCommandCode();
// peek to see if the current bytes are an IBM5250 datastream header.
DataStreamHeader dsh = null;
string errmsg = null;
{
var rv = DataStreamHeader.Factory(inputArray);
dsh = rv.Item1;
errmsg = rv.Item2;
}
// current bytes are an ibm5250 datastream header. ( page 2-4 of rfc 1205 )
// store this header as the "current datastream header". When there is a
// current data stream header the code will match the current bytes against
// ibm5250 data stream commands.
if (errmsg == null)
{
lines.Add(
Direction + " " + this.Counter.ToString() + " "
+ dsh.ToString());
this.CurrentDataStreamHeader = dsh;
continue;
}
// currently in a 5250 data stream header.
if (this.CurrentDataStreamHeader != null)
{
var dataStreamCommand = WorkstationCommandBase.ParseFactory(inputArray);
if (dataStreamCommand != null)
{
lines.Add(
Direction + " " + this.Counter.ToString() + " "
+ dataStreamCommand.ToString());
// all the data stream command ToString methods provide enough info.
// But for the WriteToDisplayCommand, list out the ToString contents of
// the WtdOrders of that command.
if (dataStreamCommand is WriteToDisplayCommand)
{
var wtdCommand = dataStreamCommand as WriteToDisplayCommand;
foreach (var order in wtdCommand.OrderList)
{
lines.Add(order.ToString());
}
}
continue;
}
}
{
var stmt = TelnetCommand.Factory(inputArray);
if (stmt != null)
{
lines.Add(
Direction + " " + this.Counter.ToString() + " " + stmt.ToString());
continue;
}
}
if ((escapeCmd != null) && (escapeCmd.Value == CommandCode.ESCAPE))
{
var rv = TerminalVt100Statement.Factory(inputArray);
var vtStmt = rv.Item1;
var otStmt = rv.Item2;
lines.Add(
Direction + " " + this.Counter.ToString() + " " + vtStmt.ToString());
if (otStmt != null)
{
lines.Add(
Direction + " " + this.Counter.ToString() + " " + otStmt.ToString());
}
continue;
}
{
var remBytes = inputArray.GetBytesToEnd();
lines.Add(Direction + " " + this.Counter.ToString()
+ " Raw bytes follow:");
LogFile_WriteRawBytes(remBytes, lines);
}
}
WriteTextLines(lines);
}
ParseWorkstationCommandList(
InputByteArray InputArray,
SessionSettings SessionSettings)
{
var wrkstnCmdList = new WorkstationCommandList();
DataStreamHeader dsh = null;
bool gotEOR = false;
bool needMoreBytes = false;
string errmsg = null;
if (InputArray.IsDataStreamHeader())
{
var rv = DataStreamHeader.Factory(InputArray);
dsh = rv.Item1;
errmsg = rv.Item2;
}
bool lastCmdWasTelnet_EOR = false;
bool gotWorkstationCommand = true;
gotEOR = false;
while ((InputArray.IsEof( ) == false) && (gotEOR == false) &&
(gotWorkstationCommand == true))
{
// no input data to process.
lastCmdWasTelnet_EOR = false;
gotWorkstationCommand = false;
// check for IAC EOR
var telCode = InputArray.PeekTelnetCommandCode(CommandCode.EOR);
if (telCode != null)
{
var telCmd = InputArray.NextTelnetCommand();
lastCmdWasTelnet_EOR = true;
gotEOR = true;
}
// process the input as workstation data stream commands.
else
{
var rv = ParseAndProcessWorkstationCommand(InputArray);
var workstationCommand = rv.Item1;
var howRead = rv.Item2;
if (workstationCommand != null)
{
wrkstnCmdList.Add(workstationCommand);
gotWorkstationCommand = true;
}
}
}
// read available bytes from input stream.
if (InputArray.IsEof() && (lastCmdWasTelnet_EOR == false))
{
needMoreBytes = true;
}
return(new Tuple <DataStreamHeader, WorkstationCommandList, bool, bool>(
dsh, wrkstnCmdList, gotEOR, needMoreBytes));
}