From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michal Soltys <nozo@ziu.info>
Date: Tue, 18 Sep 2007 08:44:42 +0000
Subject: Re: [LARTC] I'm having an issue with u32 masking
Message-Id: <46EF8FFA.6070707@ziu.info>
List-Id: <lartc.vger.kernel.org>
References: <46EF6840.90305@vadtec.net>
In-Reply-To: <46EF6840.90305@vadtec.net>
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To: lartc@vger.kernel.org

Vadtec wrote:
> Is this how tc is supposed to work? Does it only match on the value it 
> is given based on whether or not the mask matches? IE: u16 0x1a00 0x1a0f 
> at 22 (dest port 6656 ONLY), u16 0x1a0b 0x1a0f at 22 (dest port 6667 ONLY)
> 
> If so, how can you match a range of ports (in my example, or a range of 
> anything for that matter) in tc?
> 

Try:

match u16 0x1a00 0xfff0

Mask is first applied to the value in the packet, then it's tested 
against your (0x1a00) value.

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