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Little Charlie pouted and nodded.由著名导演苏舟执导，知名演员于荣光、果静林、于晓光等联袂主演的年度革命大戏《移动的枪口》目前正在上海紧锣密鼓的拍摄中。近日，该剧开放媒体探班，因遇上百年遇见的高温，剧组都有苦说不出。于荣光的嘴巴更是被热得肿起来，他自嘲跟猪嘴一样。找好男主角后，夏林又找了业界最资深的武术指导程卫国的儿子程小明，《白发魔女传》这部戏的主要人员也算齐了。During the establishment of a tcp connection, If the server returns syn and ack messages, The client does not confirm it for some reason. This is because the server needs to retransmit the syn + ack message and wait for the client's confirmation message until the tcp connection timeout. This state of waiting for the client to confirm the connection is usually called a half-open connection. The half-open connection will be kept in the connection table of the server until the connection is disconnected.In TCP implementation, when receiving the SYN request from the client, the server needs to reply the SYN + ACK packet to the client, and the client also needs to send the confirmation packet to the server. Usually, the initial serial number of the server is calculated by the server according to certain rules or adopts random numbers. However, in SYN cookies, the initial serial number of the server is obtained by hash operation and encryption of the client IP address, client port, server IP address, server port and other security values, which is called cookie. When the server suffers from SYN attack and makes the backlog queue full, the server does not reject the new SYN request, but replies the cookie (SYN serial number of the reply packet) to the client. If it receives the ACK packet from the client, the server subtracts 1 from the ACK serial number of the client to obtain the cookie comparison value, and performs a hash operation on the above elements to see if it is equal to the cookie. If equal, complete the three-way handshake directly (Note: At this time, you don't need to check whether this connection belongs to the backlog queue).　　然而西蒙却意犹未尽。他命令麦克莱恩去拆除街心花园的炸弹，又宣称在纽约市一所小学校内安放了炸弹。警方