fix nat sdp handling

kamailio/nat-traversal-role.cfg

@@ -13,7 +13,7 @@ modparam("nathelper", "sipping_from", "sip:sipcheck@MY_HOSTNAME")
 #!endif
 
 #!trydef KZ_NAT_FIX_SDP_REQUEST 1
-#!trydef KZ_NAT_FIX_SDP_REPLY 0
+#!trydef KZ_NAT_FIX_SDP_REPLY 1
 #!trydef KZ_NAT_SDP_TEST 8
 #!trydef KZ_NAT_SDP_FIX 10
 
@@ -71,6 +71,12 @@ route[NAT_DETECT]
 
 route[NAT_MANAGE]
 {
+   if(is_reply() && $sel(cfg_get.kazoo.nat_fix_sdp_reply) == 1) {
+       if (has_body("application/sdp") && nat_uac_test(KZ_NAT_SDP_TEST)) {
+           fix_nated_sdp(KZ_NAT_SDP_FIX);
+       }
+   }
+
    if ( is_request() && isflagset(FLAG_INTERNALLY_SOURCED)) {
         setbflag(FLB_NATB);
    }
@@ -91,12 +97,6 @@ route[NAT_MANAGE]
        }
    }
 
-   if($sel(cfg_get.kazoo.nat_fix_sdp_reply) == 1) {
-       if (has_body("application/sdp") && nat_uac_test(KZ_NAT_SDP_TEST)) {
-           fix_nated_sdp(KZ_NAT_SDP_FIX);
-       }
-   }
-
 }
 
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