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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).活泼可爱的乡村姑娘罗小蔓本来与年迈的婆婆在乡村过着无忧无虑的生活，然而一个自称是小蔓父亲朋友的男人(刘文达)的出现，小蔓便开始了他牵魂动魄的南国都市生活，面对文达的太太舒云的猜疑，家贝、舒风的刁难，倔强的小蔓为了实现作名设计师的梦想一再忍受RA1, …又使我们成为国民，作他父神的祭司。但愿荣耀、权能归给他，直到永永远远。阿们！黎明前的上海，社会各界知名人士纷纷响应中共民主主张，要求结束蒋家王朝专制统治。人心向背，大厦将倾，困兽犹斗的国民党国防部保密局，接受躲在溪口老家幕后指挥的蒋介石直接指令，针对那些无法公开清除的社会名人，炮制出一份“黑色名单”。军统昆明站干将黄龙杰被抽调组建代号为“闪电”的特别行动小组，展开一系列瞒天过海的暗杀活动。为此，黄龙杰以药业公司代表身份，携带妻子和部下分批赶到上海，向上海站站长韩天石报到，同时展开行动。从积极北上呼吁和平的大学教授苏文渊，到有着政治背景的商界大佬海爷都奇怪地死于意外，繁华霓虹掩饰下的上海滩，一时血雨腥风、人人自危……上海地下党组织敏锐地发现了这一动向，决定成立“曙光”行动小组，由表面上八面玲珑的商界女强人、实为地下党员的中洋贸易公司单身女经理郭家月牵头，执行保护任务，以年画作坊为掩护的情报站主任王怀志担任这一小组的联络人。“曙光”甫一出手即技惊四座，全歼黄龙杰直接从昆明带来的三员干将。由此也引起了黄龙杰的注意，而他毫无察觉的是，他和郭家月之间还存在着一个特殊的关联能帮我吗？”First do inter-provincial transfer. From the first semester to the second semester to the second semester. It is not possible to finish the senior high school entrance examination.