feature: support session manager scan

src/session/session_utils.cpp

@@ -1,6 +1,6 @@
 #include <assert.h>
 
-#include "session_def.h"
+#include "session_private.h"
 #include "session_utils.h"
 #include "session_manager.h"
 
@@ -50,16 +50,6 @@ const struct tuple6 *session_get_tuple6(const struct session *sess)
     return &sess->tuple;
 }
 
-void session_set_tuple_direction(struct session *sess, enum flow_direction dir)
-{
-    sess->tuple_dir = dir;
-}
-
-enum flow_direction session_get_tuple6_direction(const struct session *sess)
-{
-    return sess->tuple_dir;
-}
-
 const char *session_get0_readable_addr(const struct session *sess)
 {
     return sess->tuple_str;