netdev - Re: Ethernet Frame Generation

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Message-ID: <20070327154749.GA31957@2ka.mipt.ru>
Date:	Tue, 27 Mar 2007 19:47:49 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Simba <simba@...nking.at>
Cc:	netdev@...r.kernel.org
Subject: Re: Ethernet Frame Generation

On Tue, Mar 27, 2007 at 05:27:42PM +0200, Simba (simba@...nking.at) wrote:
> I am currently working on a new l2/l3 protocol (just for
> research reasons) and i would like to make a test implementation
> in the linux kernel.
> 
> For this i need to modify the ethernet header and replace it
> with my header. The payload of this header holds the raw data, or
> an TCP segment, or an UDP datagram.

How will your hardware handle that new protocol?

Anyway, you need to setup skb and call driver's ->hard_start_xmit() 
callback under tx lock with check if driver allows to transmit data.

Check net/pktgen.c -> pktgen_xmit() function.

The simplest way to receive a packet is about putting your code into 
netif_receive_skb().

-- 
	Evgeniy Polyakov
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