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From: Michal Soltys <nozo@ziu.info>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] tc filter syntax (and general noobness)
Date: Fri, 07 Sep 2007 16:17:06 +0000	[thread overview]
Message-ID: <46E17982.802@ziu.info> (raw)
In-Reply-To: <46E162F3.7010301@vadtec.net>

Vadtec wrote:
> 
> ...
> protocol 6 match u32 0xff534d42 0xffffffff at nexthdr+23 flowid 2:50
> ...
> 

Using nexthdr+ in as simple way as above won't work. U32 won't automatically 
adjust for the proper offset, you have to do it manually with another u32 
filter, using "link" option.

It's very well explained in

http://ace-host.stuart.id.au/russell/files/tc/doc/cls_u32.txt

As a side note - don't forget that you can simply mark the traffic in 
iptables and then use fwmark instead of u32 (or with u32 match mark).




Other bits of not so easily to find documentation re. tc, in case you need 
it later in other cases:

1) In source tarball, check doc subdirectory for info about extended action 
syntax

2) a bit of info about basic classifiers:
   http://marc.info/?l=lartc&m\x117569441229800&w=2

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      reply	other threads:[~2007-09-07 16:17 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-09-07 14:40 [LARTC] tc filter syntax (and general noobness) Vadtec
2007-09-07 16:17 ` Michal Soltys [this message]

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