netfilter: nf_nat_core: eliminate useless find_appropriate_src for IP_NAT_RANGE_PROTO...

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/netfilter/nf_nat_core.c b/net/ipv4/netfilter/nf_nat_core.c
index d2a887f..6c6a3cb 100644 (file)
--- a/net/ipv4/netfilter/nf_nat_core.c
+++ b/net/ipv4/netfilter/nf_nat_core.c
@@ -240,12 +240,12 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
           This is only required for source (ie. NAT/masq) mappings.
           So far, we don't do local source mappings, so multiple
           manips not an issue.  */
-       if (maniptype == IP_NAT_MANIP_SRC) {
+       if (maniptype == IP_NAT_MANIP_SRC &&
+           !(range->flags & IP_NAT_RANGE_PROTO_RANDOM)) {
                if (find_appropriate_src(orig_tuple, tuple, range)) {
                        pr_debug("get_unique_tuple: Found current src map\n");
-                       if (!(range->flags & IP_NAT_RANGE_PROTO_RANDOM))
-                               if (!nf_nat_used_tuple(tuple, ct))
-                                       return;
+                       if (!nf_nat_used_tuple(tuple, ct))
+                               return;
                }
        }