[358] in linux-net channel archive
Re: Problems with Linux talking to Tektronix machines
daemon@ATHENA.MIT.EDU (Jim Shankland)
Sat May 20 19:14:42 1995
Date: Sat, 20 May 1995 15:03:57 -0700
From: Jim Shankland <jas@flyingfox.COM>
To: linux-net@vger.rutgers.edu, matthew@sleeper.apana.org.au
> I have a 'vintage' Tektronix XD88/10 workstation. I use this
> as my main machine, and use Linux as a router and a platform
> to experiment on.
>
> For some time, ( up to 1.2.8 at least ) I have had this problem
> were is I hit ^C (kill ), The Tek stops recieveing from the
> Linux machine.
>
> I have a transciever on the Tek with Tx/Rx lights, and I gather
> from watching these lights that after I hit ^C, Linux sends
> some sort of packet that confuses the Tek, and the Tek stops
> listing to it.
>
> I can cleanly logout of the linux machine, so its still
> listening to me !.
I have the same problem telnetting into my Linux machine from a
Solaris machine (Solaris 2.4 --> Linux 1.2.1). The problem is
clearly caused by the telnet process sending TCP urgent data, and
it's consistent -- sending a ctl-C or ctl-Z freezes my telnet
session every time. I seem to remember some sort of off-by-one
ambiguity regarding the meaning of the urgent data pointer --
that might tie in somewhere.
Anyway, I'll take a closer look in the next several weeks,
if nobody else has by then. For now, I'm happily telnetting
from Solaris --> SunOS --> Linux (which works fine) as a
workaround, so that pushes this problem down my priority list
a bit ....
Jim Shankland
Flying Fox Computer Systems, Inc.
