From 0abee5260babe0a12d468b485a28336551697925 Mon Sep 17 00:00:00 2001
From: Changli Gao <xiaosuo@gmail.com>
Date: Wed, 15 Sep 2010 19:24:50 +0200
Subject: [PATCH] netfilter: nf_nat: add nf_nat_csum()

Add a static function nf_nat_csum() to replace the duplicate code in
nf_nat_mangle_udp_packet() and __nf_nat_mangle_tcp_packet().

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
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