Refactor the session manager using session transformation 2D array & Update test case

src/session/session_transition.h

@@ -0,0 +1,41 @@
+#ifndef _SESSION_TRANSITION_H
+#define _SESSION_TRANSITION_H
+
+#ifdef __cpluscplus
+extern "C"
+{
+#endif
+
+#include "log.h"
+#include "session.h"
+
+#define SESSION_TRANSITION_LOG_DEBUG(format, ...) LOG_DEBUG("session transition", format, ##__VA_ARGS__)
+
+enum session_inputs
+{
+    NONE = 0,
+
+    // packet
+    TCP_SYN = 1 << 0,
+    TCP_SYN_ACK = 1 << 1,
+    TCP_FIN = 1 << 2, // Only Fist FIN
+    TCP_RST = 1 << 3,
+    TCP_DATA = 1 << 4,
+    UDP_DATA = 1 << 5,
+
+    // session timeout
+    TIMEOUT = 1 << 6,
+
+    // session table full evict
+    LRU_EVICT = 1 << 7,
+};
+
+void session_transition_init();
+enum session_state session_transition_run(enum session_state curr_state, int inputs);
+void session_transition_log(struct session *sess, enum session_state curr_state, enum session_state next_state, int inputs);
+
+#ifdef __cpluscplus
+}
+#endif
+
+#endif