netdev - [XFRM]: Optimize MTU calculation

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Message-ID: <46128290.5060701@trash.net>
Date:	Tue, 03 Apr 2007 18:36:32 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Kernel Netdev Mailing List <netdev@...r.kernel.org>
CC:	Herbert Xu <herbert@...dor.apana.org.au>
Subject: [XFRM]: Optimize MTU calculation

I've updated my IPsec MTU optimization patch I've posted a couple
of month ago to net-2.6.22 and added the further optimization
suggested by Herbert to account for the space lost due to alignment
in the room reserved for IP options in transport mode.

Tested with IPv4 and IPv6 in tunnel and transport mode. Beet mode
is untested since no keying daemon seems to support it.

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