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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).Https://www.jiemian.com/article/2109093.html正好，杨长帆去吧，管你胜败，狗咬狗。In Volume 17 of "Five Lantern Festival Yuan", there is a quotation from Zen Master Qingyuan Weixin of Tang Dynasty: "When the old monk did not meditate 30 years ago, he saw mountains as mountains and water as water. Later, when I saw knowledge personally, I saw that mountains were not mountains and water was not water. Now I have to have a rest place. Seeing mountains from the front is only mountains and seeing water is only water."《暖暖的幸福》是由北京天地智慧影视传媒股份有限公司、霍尔果斯冰与火影视传媒有限公司、东方爱娃（北京）影视传媒有限公司联合出品，徐健担任总制片人、王海地制片人，殷飞、王磊执导，陈冰编剧，涂松岩、黄曼、赵淑珍、徐申东、郑家伦等出演的都市家庭轻喜剧。该剧讲述了一个生活在北京四合院里的重组家庭，一家人为能给奶奶一个幸福的晚年生活，编织了一个善意而凄美的谎言，从而引发一系列啼笑皆非的故事。　　同样身为亚人的佐藤（绫野刚 饰）救出了永井圭，希望后者能够加入自己的阵营。佐藤依靠着进行恐怖活动来威胁政府，提出建立亚人自治区的诉求。永井圭知道佐藤生性贪婪邪恶，不愿意就范，因此亦被佐藤视为敌人。身处漩涡的中心，永井圭知道，这并不单单只是佐藤和自己的战争，而是人类和亚人之间的博弈。