[2197] in linux-net channel archive
Re: LCP echo problems (again)
daemon@ATHENA.MIT.EDU (linuxsys@ssg.com)
Thu Mar 21 10:54:10 1996
Date: Thu, 21 Mar 1996 14:10:48 GMT
From: linuxsys@ssg.com
To: Paul Mackerras <paulus@cs.anu.edu.au>
Cc: longyear@netcom.com, linuxsys@ssg.com, linux-net@vger.rutgers.edu
In-Reply-To: <199603202247.JAA11460@sirius.anu.edu.au>
Paul Mackerras writes:
> > Linux pppd version 2.2 sends an empty CCP frame if you don't have any
> > compressors defined.
>
> If no compressors are enabled, pppd is supposed to bring up CCP in
> "silent" mode, so it won't send a CCP frame unless it sees one from
> the peer. It needs to be able to send an empty CCP frame in the case
> that the peer wants us to compress stuff going to it, and we're
> willing, but we don't want stuff coming to us compressed.
>
> It looks to me like the problem is that pppd is not checking with the
> kernel which compression options are supported before making the
> decision about whether to open CCP in silent mode or not. This is a
> bug which can be fixed by changing the line in ccp_open which says
>
> if (!ANY_COMPRESS(ccp_wantoptions[unit]))
>
> to
> ccp_resetci(f);
> if (!ANY_COMPRESS(ccp_gotoptions[unit]))
>
> Also, I think we need a -ccp option (or something) to disable CCP
> completely.
>
Al, Paul, which route should I take when trying to stay connected with
my ISP for more than ~5 minutes at a shot? Delete the CCP code or try
this patch? I agree that -/+ccp is a very good idea.
Rick
