Tn3270 terminal negotiation

7stud2 · 28 May 2013 22:31

I am trying to simulate / replicate the Hercules console.c function in a
Ruby script to connect to a tn3270 emulator.

I'm using Tom Brennan's Vista tn3270, haven't tried another one yet.

rbowler/spinhawk/blob/master/console.c

/* CONSOLE.C    (c)Copyright Roger Bowler, 1999-2011                 */
/*              Hercules Console Device Handler                      */

/*-------------------------------------------------------------------*/
/* This module contains device handling functions for console        */
/* devices for the Hercules ESA/390 emulator.                        */
/*                                                                   */
/* Telnet support is provided for two classes of console device:     */
/* - local non-SNA 3270 display consoles via tn3270                  */
/* - local non-SNA 3270 printers         via tn3270                  */
/* - 1052 and 3215 console printer keyboards via regular telnet      */
/*-------------------------------------------------------------------*/

/*-------------------------------------------------------------------*/
/* This module also takes care of the differences between the        */
/* remote 3270 and local non-SNA 3270 devices.  In particular        */
/* the support of command chaining, which is not supported on        */
/* the remote 3270 implementation on which telnet 3270 is based.     */
/* In the local non-SNA environment a chained read or write will     */
/* continue at the buffer address where the previous command ended.  */

This file has been truncated. show original

lines 672-823

I *do* get the terminal "activated", but when I send
"#{IAC}#{DO}#{TERMINAL_TYPE}",0 is executed, it's also displaying "255
253 24 "
(IAC DO TERMINAL_TYPE) on the screen, while a 'normal' hercules
connection does not, so I wonder what I'm missing? Possibly a tcp
option ?

Mike

···

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Tn3270 terminal negotiation

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