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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SO_CONNECT_TIME)来检查AcceptEx()里守候的套接字。
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