From: Nikolay Kichukov <hijacker@oldum.net>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] Tc Filter - Port Ranges Calculate Mask Value
Date: Tue, 23 Oct 2007 12:27:37 +0000 [thread overview]
Message-ID: <471DE8B9.2040602@oldum.net> (raw)
In-Reply-To: <fcb9e02f0710190514g6a97ab1ch6bbe323b5db84aeb@mail.gmail.com>
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Hello Anshul and list,
That is really interesting matter. I am also awaiting someone who knows
how the hex mask is calculated and applied to reply to this post.
I am sure it was discussed on the list before, but anyways I might have
missed that part.
Cheers,
- -Nikolay
anshul makkar wrote:
> Hi,
>
> I need to support port ranges in tc filter rules.
>
> I know how to formulate the rule but , I am not able to understand how
> to calculate the mask value for a perticular range so as to segregate
> the port values that lie within this range .
>
> I got the following sample
>
> "tc filter add dev eth1 parent 1:1 protocol ip prio 10 u32 match ip
> sport 0x1ae0 0x1ff0 flowid 1:10 This rule will match all ports from
> 6880 to 6895. "
>
> This rule correctly matches port range from 6880 to 6895. But I am
> unable to figure out , how the mask value has been calculated.
>
> I am picking up port ranges from GUI. So the range can be any and I
> need to calculte mask value so as to find out which ports lie within
> the entered range.
>
> Please if you have any link, clue or reference material , do share it.
>
> Thanking You
> Anshul Makkar
> _______________________________________________
> LARTC mailing list
> LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
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next prev parent reply other threads:[~2007-10-23 12:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-19 12:26 [LARTC] Tc Filter - Port Ranges Calculate Mask Value anshul makkar
2007-10-20 18:42 ` anshul makkar
2007-10-23 12:27 ` Nikolay Kichukov [this message]
2007-10-23 14:38 ` Peter Rabbitson
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