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000017_news@columbia.edu _Fri Feb 18 14:40:08 2000.msg
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From: jrd@cc.usu.edu (Joe Doupnik)
Subject: Re: TELNET error with K95 1.19
Message-ID: <9R18JwztC05A@cc.usu.edu>
Date: 18 Feb 00 11:20:05 MDT
Organization: Utah State University
To: kermit.misc@columbia.edu
In article <88iq98$kg0$1@newsmaster.cc.columbia.edu>, jaltman@watsun.cc.columbia.edu (Jeffrey Altman) writes:
> In article <3ERmaxlQV+sL@cc.usu.edu>, Joe Doupnik <jrd@cc.usu.edu> wrote:
> : Yup, that's the short answer. There could have been another approach
> : to the difficulty which is a client offers Telnet Options but does not halt
> : waiting for responses. In principle, it says in bold quotes, Options can
> : occur at any time in the session, though the principle collides with what
> : to do about text exchanged in the meanwhile. Isn't that correct Jeff?
> : If it were correct then a regular Telnet client could offer Options and
> : still make progress on non-Telnet servers. I wish my UnixWare Telnet were
> : that way, but it isn't. This boils down to chickens, eggs, and should we
> : wait to check for traffic before crossing the road, or some such muddle.
> : Joe D.
>
>
> The reasons that Kermit 95 and C-Kermit no longer connect without
> waiting for telnet option negotiations when using TELNET protocol
> is clearly detailed in
>
> http://www.kermit-project.org/telnet.html
<long explanation omitted>
>
> Jeffrey Altman * Sr.Software Designer * Kermit-95 for Win32 and OS/2
> The Kermit Project * Columbia University
> 612 West 115th St #716 * New York, NY * 10025
> http://www.kermit-project.org/k95.html * kermit-support@kermit-project.org
-------
Thanks Jeff. I thought it would have triggered that elucidation,
and it worked like a charm. That is the kind of information people need to
understand how Telnet Options work with today's software.
What's missing from the Telnet spec is the notion of timely responses.
As we know, some Options are dealt with a ways into the session, terminal
type queries in particular. As you point out this has unfortunate consequences
for secure comms and proper terminal type, and so on.
If I might suggest to the IETF Telnet working group, a summary RFC on
the state of Telnet and its proper implementation would be a good thing to
have on record. We know you have nothing else to do(!)
Joe D.