nat: respect udp checksum

Type: fix

Change-Id: I732be02d2e2b854eb589c3fa10f980ef2dbe8dfc
Signed-off-by: Filip Varga <fivarga@cisco.com>
(cherry picked from commit 16572355c9069e2e8e4836dc6bd6a65feed2d390)

diff --git a/src/plugins/nat/out2in.c b/src/plugins/nat/out2in.c
index 8c6cb48..00c5176 100755 (executable)
--- a/src/plugins/nat/out2in.c
+++ b/src/plugins/nat/out2in.c
@@ -895,10 +895,6 @@ VLIB_NODE_FN (snat_out2in_node) (vlib_main_t * vm,
 
          if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
            {
-             old_port0 = tcp0->dst_port;
-             tcp0->dst_port = s0->in2out.port;
-             new_port0 = tcp0->dst_port;
-
              sum0 = tcp0->checksum;
              sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
                                     ip4_header_t,