Date: Sat, 07 Apr 2001 12:29:44 +0100 From: Brian Somers <brian@Awfulhak.org> To: Martin Husemann <martin@duskware.de> Cc: freebsd-isdn@FreeBSD.org, brian@Awfulhak.org, joerg@FreeBSD.org Subject: Re: PPP encapsulation Message-ID: <200104071129.f37BTjl55848@hak.lan.Awfulhak.org> In-Reply-To: Message from Martin Husemann <martin@duskware.de> of "Sat, 07 Apr 2001 09:14:17 %2B0200." <200104070715.f377FWG04663@night-porter.duskware.de>
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This framing is only required for passing ppp packets over
asynchronous transports. Something the sppp (stands for
*synchronous* ppp) device doesn't do AFAIK.
So yes, tearing out the code would probably be a good thing IMHO.
I've cc'd Joerg in case I'm talking out my ass - I believe he wrote
sppp originally :-)
> Hi!
>
> For reasons completely unrelated to ISDN I'm currently modifying if_spppsubr.c
> to optionally work without adding/expeccting serial encapsulation
> (PPP in HDLC-like Framing, RFC 1662).
>
> While there, I wondered if this framing is usefull for transmitting PPP over
> ISDN, and answered myself "not at all".
>
> Is there any standard requiring this framing? Do implemenations typically
> (a) require it and/or (b) use it (besides being tolerant and allowing us
> to use and require it - it's easily detectable automatically)?
>
> What would happen if I'd change the isp driver to not use serial framing?
>
> Any hints?
>
>
> Martin
--
Brian <brian@Awfulhak.org> <brian@[uk.]FreeBSD.org>
<http://www.Awfulhak.org>; <brian@[uk.]OpenBSD.org>
Don't _EVER_ lose your sense of humour !
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