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Re: PPP handling of unknown CI configuration requests


Øyvind Harboe <oyvind.harboe@zylin.com> writes:

> On Fri, 2004-04-16 at 13:22, Nick Garnett wrote:
> > Øyvind Harboe <oyvind.harboe@zylin.com> writes:
> > 
> > > I'm trying to get PPP to work against Windows and although I know very
> > > little about PPP, I get the impression from glossing over the PPP RFC
> > > that unknown CI configuration requests should be silently ignored.
> > 
> > I'm not sure about that. RFC1661 says:
> 
> I'd have to agree when I read it again.
> 
> I am in over my head trying to debug why this doesn't work with a the
> Windows incoming connections PPP server, hence jumping to conclusions. 
> 
> Is this feedback helpful or just frustrating? :-)

It is useful. In theory the PPP implementation should talk to
anything, it is based on the BSD code after all. However, I wouldn't
be surprised if Microsoft have implemented things their own way, just
to be difficult.

My ability to debug this myself is limited. All my machines run Linux
and the only XP dual boot machine I have is also used for my email.

> 
> I presume Windows wants support for CI_CALLBACK. I'm not using it, so
> why Windows asks for it, I don't know.

Hopefully just rejecting it should make it go away.

> 
> I didn't find any CI_XXX for 17,19,23 so I don't know what they mean.

These have something to do with multilink connections. The Windows
server is advertising that it supports it. Just rejecting them should
stop it trying any further stuff here.

> > > 
> > > My debug sessions indicate that the link isn't quite as quickly shut
> > > down at least.
> > 
> > I don't see any serious delays in shutdown. It does take a couple of
> > seconds however.
> 
> Bad wording from me.
> 
> Without the changes in the last message, the link was immediately
> terminated by the Windows PPP server.

Very strange. Maybe you have to do some extra setup on the Windows
side to disable some of the more advanced features.

-- 
Nick Garnett                    eCos Kernel Architect
http://www.ecoscentric.com      The eCos and RedBoot experts


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