public static Tuple <List <ShowItemBase>, TelnetLogList> NextServerRequest(
NetworkStreamBackedInputByteArray InputArray,
NegotiateSettings NegotiateSettings,
bool ForceRead = false)
{
TelnetLogList logList = new TelnetLogList();
var showItemList = new ShowItemList();
while (true)
{
// read available bytes from input stream.
if (InputArray.IsEof())
{
var log = InputArray.ReadFromNetworkStream(5, 5, ForceRead);
logList.AddItems(log);
}
// no input data to process.
if (InputArray.IsEof())
{
break;
}
var buf = InputArray.PeekDataStreamHeader();
if (buf != null)
{
var dsh = new DataStreamHeader(InputArray);
logList.AddItems(Direction.Read, dsh.ToReportLines( ), true);
var rv = ParseAndProcessWorkstationCommand(InputArray, dsh);
var workstationCommand = rv.Item1;
showItemList = rv.Item2;
logList.AddItems(rv.Item4);
}
// check for IAC EOR
{
var telCode = InputArray.PeekTelnetCommandCode(CommandCode.EOR);
if (telCode != null)
{
var telCmd = InputArray.NextTelnetCommand();
logList.AddItems(Direction.Read, telCmd.ToReportLines(), true);
}
}
// peek and process input bytes as a telnet stmt. ( starts with IAC )
{
var telCmd = InputArray.NextTelnetCommand();
if (telCmd != null)
{
var rv = TelnetConnection.ProcessTelnetCommand(telCmd, NegotiateSettings);
var cx = rv.Item1;
var writeBytes = rv.Item2;
logList.AddItems(rv.Item3);
WriteToHost(logList, writeBytes, InputArray.NetStream);
}
}
}
return(new Tuple <List <ShowItemBase>, TelnetLogList>(showItemList, logList));
}
public static Tuple <WorkstationCommandList, TelnetLogList> GetAndParseWorkstationCommandList(
NetworkStreamBackedInputByteArray InputArray,
SessionSettings SessionSettings)
{
TelnetLogList logList = new TelnetLogList();
var wrkstnCmdList = new WorkstationCommandList();
var dsh = new DataStreamHeader(InputArray);
if (dsh != null)
{
logList.AddItems(Direction.Read, dsh.ToReportLines( ), true);
}
if ((dsh != null) && (dsh.Errmsg == null))
{
bool lastCmdWasTelnet_EOR = false;
while (dsh != null)
{
// read available bytes from input stream.
if (InputArray.IsEof() && (lastCmdWasTelnet_EOR == false))
{
var log = InputArray.ReadFromNetworkStream(5, 5);
logList.AddItems(log);
}
// no input data to process.
if (InputArray.IsEof())
{
break;
}
lastCmdWasTelnet_EOR = false;
// check for IAC EOR
var telCode = InputArray.PeekTelnetCommandCode(CommandCode.EOR);
if (telCode != null)
{
var telCmd = InputArray.NextTelnetCommand();
logList.AddItems(Direction.Read, telCmd.ToReportLines(), true);
lastCmdWasTelnet_EOR = true;
}
// process the input as workstation data stream commands.
else
{
var rv = ParseAndProcessWorkstationCommand(InputArray, dsh);
var workstationCommand = rv.Item1;
dsh = rv.Item3;
logList.AddItems(rv.Item4);
if (workstationCommand != null)
{
wrkstnCmdList.Add(workstationCommand);
}
}
}
}
return(new Tuple <WorkstationCommandList, TelnetLogList>(wrkstnCmdList, logList));
}
/// <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 <object[], string> ParseResponseStream(
TelnetLogList LogList, byte[] ResponseStream)
{
List <object> listItems = new List <object>();
string errmsg = null;
var inputArray =
new NetworkStreamBackedInputByteArray(ResponseStream, ResponseStream.Length);
var writeStream = new ByteArrayBuilder();
DataStreamHeader dsHeader = null;
ResponseHeader responseHeader = null;
// stream starts with data stream header.
dsHeader = new DataStreamHeader(inputArray);
listItems.Add(dsHeader);
errmsg = dsHeader.Errmsg;
LogList.AddItems(Direction.Write, dsHeader.ToReportLines(), true);
// next is the response header.
if (errmsg == null)
{
responseHeader = new ResponseHeader(inputArray);
listItems.Add(responseHeader);
errmsg = responseHeader.Errmsg;
LogList.AddItems(Direction.Write, responseHeader.ToReportLines(), true);
}
// repeating instances of sbaOrder, textDataOrder pairs.
while (true)
{
// 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;
}
listItems.Add(orderPair);
LogList.AddItems(Direction.Write, orderPair.ToReportLines(), true);
}
return(new Tuple <object[], string>(listItems.ToArray(), errmsg));
}
