Add session manager

src/session/session_manager.h

@@ -0,0 +1,36 @@
+#ifndef _SESSION_MANAGER_H
+#define _SESSION_MANAGER_H
+
+#ifdef __cpluscplus
+extern "C"
+{
+#endif
+
+#include "session.h"
+
+/*
+ * session manager = session pool + session table + session timer
+ *
+ * session pool   : alloc and free session
+ * session table  : find session by session id or session addr
+ * session timer  : session timeout
+ * session manager: manage session pool, session table and session timer
+ */
+
+struct session_manager;
+struct session_manager *session_manager_create(uint64_t max_session_num);
+void session_manager_destroy(struct session_manager *mgr);
+
+typedef void (*session_event_cb)(struct session *sess, uint32_t event, void *arg);
+void session_manager_set_session_eventcb(struct session_manager *mgr, session_event_cb cb, void *arg);
+
+struct session *session_manager_find_session_by_id(struct session_manager *mgr, uint64_t id);
+struct session *session_manager_find_session_by_packet(struct session_manager *mgr, const struct packet *pkt);
+
+void session_manager_dispatch(struct session_manager *mgr);
+
+#ifdef __cpluscplus
+}
+#endif
+
+#endif