Re: [PATCH resend] netfilter: place in source hash after SNAT is done

If SNAT isn't done, the wrong info maybe got by the other cts.

As the filter table is after DNAT table, the packets dropped in filter
table also bother bysource hash table.

Signed-off-by: Changli Gao <redacted>
---
 net/ipv4/netfilter/nf_nat_core.c |   18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/net/ipv4/netfilter/nf_nat_core.c b/net/ipv4/netfilter/nf_nat_core.c
index c04787c..51ce55a 100644
--- a/net/ipv4/netfilter/nf_nat_core.c
+++ b/net/ipv4/netfilter/nf_nat_core.c

@@ -221,7 +221,14 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
 	   manips not an issue.  */
 	if (maniptype == IP_NAT_MANIP_SRC &&
 	    !(range->flags & IP_NAT_RANGE_PROTO_RANDOM)) {
-		if (find_appropriate_src(net, zone, orig_tuple, tuple, range)) {
+		/* try the original tuple first */

+		if (in_range(orig_tuple, range)) {
+			if (!nf_nat_used_tuple(orig_tuple, ct)) {
+				*tuple = *orig_tuple;
+				return;
+			}
+		} else if (find_appropriate_src(net, zone, orig_tuple, tuple,
+			   range)) {
 			pr_debug("get_unique_tuple: Found current src map\n");
 			if (!nf_nat_used_tuple(tuple, ct))
 				return;