#define SESSION_TABLE_INVALID_INDEX ((u32)~0)
#define SESSION_LOCAL_TABLE_PREFIX ((u32)~0)
#define SESSION_INVALID_INDEX ((u32)~0)
+#define SESSION_INVALID_HANDLE ((u64)~0)
typedef int (*ip4_session_table_walk_fn_t) (clib_bihash_kv_16_8_t * kvp,
void *ctx);