/// <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)
{
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);
}