X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fnat.h;h=02d4aaef9f61c45a5bdf81a0ecc19e8c0202a7b2;hb=refs%2Fchanges%2F98%2F15998%2F2;hp=134672039172126cfbc2693b6482b06c40332711;hpb=d30bf015ad3f7fbf206f143ed5d47a9af25148e8;p=vpp.git

diff --git a/src/plugins/nat/nat.h b/src/plugins/nat/nat.h
index 13467203917..02d4aaef9f6 100644
--- 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__)