netdev - Re: [PATCH ipsec 1/3] ipv6: wire up skb->encapsulation

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Message-ID: <1376766172.21329.10.camel@edumazet-glaptop>
Date:	Sat, 17 Aug 2013 12:02:52 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	netdev@...r.kernel.org, steffen.klassert@...unet.com,
	yoshfuji@...ux-ipv6.org, nicolas.dichtel@...nd.com
Subject: Re: [PATCH ipsec 1/3] ipv6: wire up skb->encapsulation

On Sat, 2013-08-17 at 19:51 +0200, Hannes Frederic Sowa wrote:
> When pushing a new header before current one call skb_reset_inner_headers
> to record the position of the inner headers in the various ipv6 tunnel
> protocols.
> 
> We later need this to correctly identify the addresses needed to send
> back an error in the xfrm layer.
> 
> This change is safe, because skb->protocol is always checked before
> dereferencing data from the inner protocol.
> 
> Cc: Steffen Klassert <steffen.klassert@...unet.com>
> Cc: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
> Cc: Nicolas Dichtel <nicolas.dichtel@...nd.com>
> Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
> ---

Acked-by: Eric Dumazet <edumazet@...gl.com>



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