Date: Fri, 14 Feb 1997 09:04:15 -0500 (EST) From: Thomas David Rivers <ponds!rivers@dg-rtp.dg.com> To: ponds!via.net!joe, ponds!freebsd.org!questions Subject: Re: tn5250 ! Message-ID: <199702141404.JAA10823@lakes.water.net>
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> > > Does anyone know how a tn5250 session differs from a regular telnet > session? I'm trying to persuade a tn5250 emulator to work with the > fwtk telnet proxy. > > Is there source to a tn5250 program available somewhere? > > Thanks, > > Joe > There are several differences; mostly that it negotiates a binary sessions instead of text one. tn5250 emulates an IBM EBCDIC terminal that deals in things called 3270-control codes; or a 3270-data stream. The terminal accepts this stream; draws stuff on the screen based on it. Let's the user fill in certain areas and when <ENTER> (or, more generically, SEND) is pressed; sends the filled in information back to the machine. If could be your proxy isn't working for binary sessions. For more information, you should see the tn3270 sources in /usr/src/usr.bin or the tn3270 man page. [A 5250 is just an improved variant of this scheme.] Also, you can look up the X11 variant (tn3270 is a curses program), x3270 - written at Georgia Tech. It's available in the ports. - Dave Rivers -
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