NAT44: fix bug in TCP close with output-feature interface (VPP-1493)

[vpp.git] / src / plugins / nat / nat.h

diff --git a/src/plugins/nat/nat.h b/src/plugins/nat/nat.h
index 1346720..02d4aae 100644 (file)
--- a/src/plugins/nat/nat.h
+++ b/src/plugins/nat/nat.h
@@ -174,6 +174,7 @@ typedef enum
 #define SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT   16
 #define SNAT_SESSION_FLAG_FWD_BYPASS           32
 #define SNAT_SESSION_FLAG_AFFINITY             64
+#define SNAT_SESSION_FLAG_OUTPUT_FEATURE       128
 
 /* NAT interface flags */
 #define NAT_INTERFACE_FLAG_IS_INSIDE 1
@@ -673,6 +674,12 @@ unformat_function_t unformat_snat_protocol;
 */
 #define is_lb_static_mapping(sm) (sm->flags & NAT_STATIC_MAPPING_FLAG_LB)
 
+/** \brief Check if client initiating TCP connection (received SYN from client)
+    @param t TCP header
+    @return 1 if client initiating TCP connection
+*/
+#define tcp_is_init(t) ((t->flags & TCP_FLAG_SYN) && !(t->flags & TCP_FLAG_ACK))
+
 /* logging */
 #define nat_log_err(...) \
   vlib_log(VLIB_LOG_LEVEL_ERR, snat_main.log_class, __VA_ARGS__)