typedef struct EXTEND_THREAD_PARAM {
	char thread_name[50];
	cyg_handle_t handle;
	void * stack_base;
	void * memp;
	cyg_thread thread_instance;
	void * private;
	} Extend_Thread_Param;
typedef struct CLIENT_DATA{
	int sfd;
	struct sockaddr_in cliaddr;
	} client_data;