Date: Sat, 12 Oct 2002 10:16:28 -0700 From: Luigi Rizzo <rizzo@icir.org> To: Andrey Degtyaryov <ad@astral-on.net> Cc: freebsd-ipfw@FreeBSD.ORG Subject: Re: TOS matching in ipfw2 Message-ID: <20021012101628.A90230@carp.icir.org> In-Reply-To: <20021011142125.GH32697@astral-on.net>; from ad@astral-on.net on Fri, Oct 11, 2002 at 05:21:26PM %2B0300 References: <20021011142125.GH32697@astral-on.net>
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On Fri, Oct 11, 2002 at 05:21:26PM +0300, Andrey Degtyaryov wrote:
> Hello!
> Why iptos takes only the limited set of "spec" values in ipfw2? It would
> be much more convenient, if "spec" could be any number. Why was it neccessary
> to apply such restriction?
i think i just copied whatever ipfw1 did. I believe there are no problems
extending the tos to match any number (or ranges, for what matters).
Many are asking me if i intend to implement ipfw2 actions which actually
modify the packet being processed.
The answer is yes, but i would like first to come up with a good
syntax for those actions, e.g.:
ipfw add 100 accept "ip.dst = 1.2.3.4, ip.tos=25" ip from a to b
Of course one would want the syntax for packet modifications to be
as general as possible, but i'd rather not need a full blown
compiler to compile such actions...
Suggestions welcome
cheers
luigi
> In This way it would be possible to implement flexible traffic
> shaping models according to the values of TOS.
> I've implemented netgraph node which changes packets' TOS values
> passed throw the interface (mark a traffic groups/clients) and ALTQ allocates
> a bandwidtch in compliance with ones. I know about traffic conditioners and
> use it on the routers which are running ALTQ. But i cannot / don't want install
> ALTQ on all routers upon many reasons.
> It would be much better to migrate from ALTQ to DUMMYNET (because of
> higher accuracy of DUMMYNET)...
>
> --
> Andrew Degtiariov
> AD5898-RIPE | AD5-UANIC
> ad@astral-on.net
>
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