netdev - Re: Ignoring destination MAC address in incoming packets

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Message-ID: <20130408071903.GB5938@ritirata.org>
Date:	Mon, 8 Apr 2013 09:19:03 +0200
From:	Antonio Quartulli <ordex@...istici.org>
To:	Krzysztof Halasa <khc@...waw.pl>
Cc:	netdev@...r.kernel.org
Subject: Re: Ignoring destination MAC address in incoming packets

On Mon, Apr 08, 2013 at 09:08:21AM +0200, Krzysztof Halasa wrote:
> Hi,
> 
> I have a bit unusual problem today. Is there a way to ignore destination
> MAC address in incoming packets?
> 
> I need to do this on Atheros Wi-Fi. Basically what I need to achieve is
> a sniffer.
> 
> Something like this:
> - ATH5k working in ad-hoc mode, certain ESSID and channel selected.
> - UDP packets in certain range are to be forwarded to other IPs.
> - the wifi interface must be able to normally communicate (within its
>   ESSID and channel).
> - it has to work with iptables etc. (DNAT, routing).
> 
> I know I can change a line in the kernel (the one setting pkt_type to
> OTHER_HOST) but perhaps there is some standard way for things like this?
> 
> Or should I use AF_PACKET and forward the data with userspace helper?
> 
> Any other idea?

May be a stupid suggestion, but what about setting promisc mode on?

Cheers,

-- 
Antonio Quartulli

..each of us alone is worth nothing..
Ernesto "Che" Guevara

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