netdev - Re: [PATCH ipsec 2/3] ipv6: xfrm: dereference inner ipv6 header if encapsulated

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Message-ID: <1376766234.21329.11.camel@edumazet-glaptop>
Date:	Sat, 17 Aug 2013 12:03:54 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	netdev@...r.kernel.org, steffen.klassert@...unet.com
Subject: Re: [PATCH ipsec 2/3] ipv6: xfrm: dereference inner ipv6 header if
 encapsulated

On Sat, 2013-08-17 at 19:51 +0200, Hannes Frederic Sowa wrote:
> In xfrm6_local_error use inner_header if the packet was encapsulated.
> 
> Cc: Steffen Klassert <steffen.klassert@...unet.com>
> Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
> ---
> 
> This patch is based on Steffen Klassert's ipsec tree. 
> 
>  net/ipv6/xfrm6_output.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
> index 3ac5ab2..45effcc 100644
> --- a/net/ipv6/xfrm6_output.c
> +++ b/net/ipv6/xfrm6_output.c
> @@ -59,10 +59,12 @@ static void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu)
>  void xfrm6_local_error(struct sk_buff *skb, u32 mtu)
>  {
>  	struct flowi6 fl6;
> +	struct ipv6hdr *hdr;
>  	struct sock *sk = skb->sk;
>  
> +	hdr = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb);
>  	fl6.fl6_dport = inet_sk(sk)->inet_dport;
> -	fl6.daddr = ipv6_hdr(skb)->daddr;
> +	fl6.daddr = hdr->daddr;
>  
>  	ipv6_local_error(sk, EMSGSIZE, &fl6, mtu);
>  }

You could have use "const struct ipv6hdr *hdr;", but otherwise :

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


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