To prevent malicious attacks or stale connections , the accepting thread should occasionally check the sockets outstanding in AcceptEx by calling getsockopt and SO_CONNECT_TIME .
要预防此类攻击，接受连接的线程应该不时地通过调用getsockopt（）函数（选项参数为SOCONNECTTIME）来检查AcceptEx（）里守候的套接字。
getsockopt