netdev - [PATCH] nf_nat_core: merge the same lines

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Message-Id: <1279792140-10445-1-git-send-email-xiaosuo@gmail.com>
Date:	Thu, 22 Jul 2010 17:49:00 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	"David S. Miller" <davem@...emloft.net>,
	netfilter-devel@...r.kernel.org, netdev@...r.kernel.org,
	Changli Gao <xiaosuo@...il.com>
Subject: [PATCH] nf_nat_core: merge the same lines

nf_nat_core: merge the same lines

proto->unique_tuple() will be called finally, if the previous calls fail. This
patch checks the false condition of (range->flags & IP_NAT_RANGE_PROTO_RANDOM)
instead to avoid duplicate line of code: proto->unique_tuple().

Signed-off-by: Changli Gao <xiaosuo@...il.com>
----
 net/ipv4/netfilter/nf_nat_core.c |    9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/net/ipv4/netfilter/nf_nat_core.c b/net/ipv4/netfilter/nf_nat_core.c
index c7719b2..037a3a6 100644
--- a/net/ipv4/netfilter/nf_nat_core.c
+++ b/net/ipv4/netfilter/nf_nat_core.c
@@ -261,14 +261,9 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
 	rcu_read_lock();
 	proto = __nf_nat_proto_find(orig_tuple->dst.protonum);
 
-	/* Change protocol info to have some randomization */
-	if (range->flags & IP_NAT_RANGE_PROTO_RANDOM) {
-		proto->unique_tuple(tuple, range, maniptype, ct);
-		goto out;
-	}
-
 	/* Only bother mapping if it's not already in range and unique */
-	if ((!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED) ||
+	if (!(range->flags & IP_NAT_RANGE_PROTO_RANDOM) &&
+	    (!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED) ||
 	     proto->in_range(tuple, maniptype, &range->min, &range->max)) &&
 	    !nf_nat_used_tuple(tuple, ct))
 		goto out;
--
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