[NETFILTER]: GRE conntrack: fix htons/htonl confusion

GRE keys are 16 bit.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 6 deletions

diff --git a/net/ipv4/netfilter/ip_nat_proto_gre.c b/net/ipv4/netfilter/ip_nat_proto_gre.c
index 6c4899d8046a..96ceabaec402 100644
--- a/net/ipv4/netfilter/ip_nat_proto_gre.c
+++ b/net/ipv4/netfilter/ip_nat_proto_gre.c
@@ -49,15 +49,15 @@ gre_in_range(const struct ip_conntrack_tuple *tuple,
              const union ip_conntrack_manip_proto *min,
              const union ip_conntrack_manip_proto *max)
 {
-        u_int32_t key;
+        __be16 key;
 
         if (maniptype == IP_NAT_MANIP_SRC)
                 key = tuple->src.u.gre.key;
         else
                 key = tuple->dst.u.gre.key;
 
-        return ntohl(key) >= ntohl(min->gre.key)
-                && ntohl(key) <= ntohl(max->gre.key);
+        return ntohs(key) >= ntohs(min->gre.key)
+                && ntohs(key) <= ntohs(max->gre.key);
 }
 
 /* generate unique tuple ... */
@@ -81,14 +81,14 @@ gre_unique_tuple(struct ip_conntrack_tuple *tuple,
                 min = 1;
                 range_size = 0xffff;
         } else {
-                min = ntohl(range->min.gre.key);
-                range_size = ntohl(range->max.gre.key) - min + 1;
+                min = ntohs(range->min.gre.key);
+                range_size = ntohs(range->max.gre.key) - min + 1;
         }
 
         DEBUGP("min = %u, range_size = %u\n", min, range_size); 
 
         for (i = 0; i < range_size; i++, key++) {
-                *keyptr = htonl(min + key % range_size);
+                *keyptr = htons(min + key % range_size);
                 if (!ip_nat_used_tuple(tuple, conntrack))
                         return 1;
         }