Date: Sun, 01 Jun 2008 12:25:24 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: rwatson@freebsd.org Cc: arch@freebsd.org, bms@freebsd.org, current@freebsd.org, ade@freebsd.org, net@freebsd.org Subject: Re: HEAD UP: non-MPSAFE network drivers to be disabled Message-ID: <20080601.122524.114765121.imp@bsdimp.com> In-Reply-To: <20080526162427.X26343@fledge.watson.org> References: <5D4AF8D7-88A7-4197-A0FE-7CA992EE5F96@FreeBSD.org> <483AD498.6070207@FreeBSD.org> <20080526162427.X26343@fledge.watson.org>
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In message: <20080526162427.X26343@fledge.watson.org>
Robert Watson <rwatson@freebsd.org> writes:
:
: On Mon, 26 May 2008, Bruce M. Simpson wrote:
:
: >> Given that this is (a) 2008 and (b) 8.x we're talking about, are there
: >> really that many consumers of SLIP to warrant it being carried forward at
: >> all?
: >
: > It's kind of a basic. [C]SLIP has been historically handy to have around for
: > situations which warrant it. Mind you, given that we have had tun(4) in the
: > tree for years now, a userland implementation of SLIP is possible.
: >
: > As with all of these things it's down to someone sitting down and doing it.
: >
: > I'm not volunteering to support any of this as I don't use it myself (got
: > enough on my plate), merely pointing out that support for SLIP in a system
: > is something many people have taken for granted over the years, and for
: > prototyping something or providing IP over a simple serial link without the
: > configuration overhead of PPP, SLIP is something someone might be using.
: >
: > P.S. ahc(4) is commodity hardware, I think it can stay right where it is
: > thank-you.
:
: My suspicion is that getting SLIP basically working in userspace is fairly
: straight forward,
SLiRP and friends have been doing this for years. I made my living
for about a year working on TIA, which was a portable, userland
implementation of PPP and SLIP/CSLIP. This was in about 1995 or so.
It isn't that hard...
: SLIP has its subtleties, but the current implementation is relatively
: straight-forward, well-documented, etc.
Yes, especially CSLIP. But frankly, they are a whole lot easier than
PPP to get up and going...
Warner
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