netdev - Re: dhcp client packet sniffing...

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Message-ID: <20100408142722.GA25392@gondor.apana.org.au>
Date:	Thu, 8 Apr 2010 22:27:22 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: dhcp client packet sniffing...

On Thu, Apr 08, 2010 at 07:47:38PM +0800, Herbert Xu wrote:
> 
> The main problem is that it needs to be able to receive packets
> destined to an address which is not yet a local address.  IOW,
> it needs to be able to bypass the routing table and receive
> non-local traffic.

Oh and if anybody is doing any user-space hacking, this is what you
could do: AF_PACKET is only necessary when you're waiting for a
response from the server.  So you could close the socket after a
lease has been acquired, and reopen it the next time you need
to communicate with a server.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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