[MUD-Dev] Re: Telnet Echo OFF/ON commands and other thingies..

Ben Greear greear at cyberhighway.net
Thu Oct 1 22:22:48 New Zealand Daylight Time 1998

On Thu, 1 Oct 1998, Bruce Mitchener, Jr. wrote:

> From: Chris Gray <cg at ami-cg.GraySage.Edmonton.AB.CA>:
> >[Bruce Mitchener:]
> >
> > >To turn echo off: `[255, 251, 1, 0, 13]
> > >To turn echo on:  `[255, 252, 1, 0, 13]
> >
> >I understand the first three bytes of these (IAC, WILL/WONT, ECHO), but
> >what are the NUL and the CR for? Do some telnet clients require those?
> Woops.  The evils of blindly copying something.  I'll pass this along to the
> people that work on ColdCore.
> >My testing (with a fairly small set of telnet clients) shows that
> >some do not respond to this correctly. They signal back that they
> >will start echoing again, but don't do so.
> Can you tell me which clients had this issue?  I'd like to pass that along
> also for test cases.
> >Note also that if you try to do any telnet commands like this, you should
> >be prepared to either pay attention to, or discard, the replies you
> >should get back. Typically [255, 253, 1] / [255, 254, 1].

Can I always assume that if I get a \377 (255 in decimal) then the next
two chars are also part of a telnet command (and so I may dis-regard

I'll try to look up the rfc tomorrow....


Ben Greear (greear at cyberhighway.net)  http://www.primenet.com/~greear 
Author of ScryMUD:  mud.primenet.com 4444

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