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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).该剧以中国共产党历史上具有重要意义的第七次全国代表大会为历史背景，通过几个小人物独特的视角来重现党史上那个伟大辉煌的历史瞬间。本剧的几个主人公都是正值青春年华的年轻人，发生在他们身上的故事和他们的命运都与“七大”的召开紧密相连。在他们当中，有人当了“七大”代表，有人成为“七大”筹备处秘书处的工作人员，也有人成为八路军特别支队的支队长，肩负着穿越敌人的一道道封锁线，掩护各抗日根据地的重要领导和“七大”代表们安全抵达延安的重任。在与日伪和国民党特务企图破坏“七大”的斗智斗勇的战斗中，他们无私地献出了自己的青春和热血，有的人甚至为“七大”的胜利召开献出了年轻的生命。Episode 26Individual unencrypted patch (applicable to previous genuine split)无影门的传人马小远为了接近女神碧云，假扮成捉妖大侠远赴盘丝镇捉妖。误打误撞之下，马小远竟杀掉了前来挑衅的蠢萌妖怪，成为了镇上的大英雄，碧云更是对他心生爱慕，不曾想却被随后出关的盘丝大仙揭露了他的骗子身份，并抓走了碧云。是贪生怕死继续做个骗子？还是奋不顾身做个英雄？马小远陷入了抉择……佃航平（阿部宽饰）曾经是宇宙科学研究机构的研究员，因工作失败辞职回到家乡，经营父亲留下的工厂佃制作所。航平的工厂遇到经营危机，而此时工厂的会计部长殿村直弘（立川谈春饰）的父亲突然病倒。殿村老家是有三百年历史的农家，他每周末要回去帮忙，照顾父亲。在去看望他时航平突然产生了新的想法，从此后，佃制作所迎来了新的换型期高冷窃贼入室盗窃，却遭遇“被犯罪爱好者”。