netdev - Re: [PATCH net] ipv6: sr: remove cleanup flag and fix HMAC computation

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Message-Id: <20170203.110541.1401279510396798868.davem@davemloft.net>
Date:   Fri, 03 Feb 2017 11:05:41 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     david.lebrun@...ouvain.be
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net] ipv6: sr: remove cleanup flag and fix HMAC
 computation

From: David Lebrun <david.lebrun@...ouvain.be>
Date: Thu, 2 Feb 2017 11:29:38 +0100

> In the latest version of the IPv6 Segment Routing IETF draft [1] the
> cleanup flag is removed and the flags field length is shrunk from 16 bits
> to 8 bits. As a consequence, the input of the HMAC computation is modified
> in a non-backward compatible way by covering the whole octet of flags
> instead of only the cleanup bit. As such, if an implementation compatible
> with the latest draft computes the HMAC of an SRH who has other flags set
> to 1, then the HMAC result would differ from the current implementation.
> 
> This patch carries those modifications to prevent conflict with other
> implementations of IPv6 SR.
> 
> [1] https://tools.ietf.org/html/draft-ietf-6man-segment-routing-header-05
> 
> Signed-off-by: David Lebrun <david.lebrun@...ouvain.be>

Applied.