netdev - Re: [PATCH 3/3] [IPSEC]: Add ICMP host relookup support

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Date:	Wed, 12 Dec 2007 10:45:16 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH 3/3] [IPSEC]: Add ICMP host relookup support

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Wed, 12 Dec 2007 09:58:01 +0800

> [IPSEC]: Add ICMP host relookup support
> 
> RFC 4301 requires us to relookup ICMP traffic that does not match any
> policies using the reverse of its payload.  This patch implements this
> for ICMP traffic that originates from or terminates on localhost.
> 
> This is activated on outbound with the new policy flag XFRM_POLICY_ICMP,
> and on inbound by the new state flag XFRM_STATE_ICMP.
> 
> On inbound the policy check is now performed by the ICMP protocol so
> that it can repeat the policy check where necessary.
> 
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
 ...
> @@ -268,6 +268,7 @@ extern void		dst_init(void);
>  /* Flags for xfrm_lookup flags argument. */
>  enum {
>  	XFRM_LOOKUP_WAIT = 1 << 0,
> +	XFRM_LOOKUP_ICMP = 1 << 1,
>  };
>  
>  struct flowi;

Sigh :-(  Applied.
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