netdev - Re: [Bugme-new] [Bug 15379] New: u32 classifier port range calculation error

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Date:	Thu, 25 Feb 2010 08:24:53 -0500
From:	jamal <hadi@...erus.ca>
To:	Reinaldo de Carvalho <reinaldoc@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, netdev@...r.kernel.org,
	bugzilla-daemon@...zilla.kernel.org,
	bugme-daemon@...zilla.kernel.org
Subject: Re: [Bugme-new] [Bug 15379] New: u32 classifier port range 
 calculation error

On Thu, 2010-02-25 at 08:25 -0300, Reinaldo de Carvalho wrote:
> Then u32 mask is useless. Or exist a correct mask to match with especific range?

Ranges and masks typically dont mix well generally - this has nothing to
do with u32; try doing subnet ranges for example. It is hard to describe
port range 10->20 using masks..

If i read your email correctly: you are trying to get the first 32 ports
after 6880. It would seem to me the mask should be 0xFFE0, no? i.e your
bc calculation should be:
echo "obase=16;(2^16)-32" | bc

cheers,
jamal

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