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The most common application of Referer Check on the Web is "preventing pictures from stealing chains."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).对爱情的坚定执着，这是一个妖女魔女能有的吗？当苏樱大声说出，这一辈子，无论如何，就认准了小鱼儿，当真不让人感动？总之。天地六界因为一颗小小的龙珠而鸡犬不宁，而就在此时玉帝王母之七个女儿因种种却纷纷下凡：大仙女为寻找被自己气走的如意郎君奎星而来到凡间；二仙女也被寂寞仙子嫦娥劝服，为了一见钟情的上官子兰而落入尘世；三仙女则无意中恋上衙门捕头王瑾难舍难分；四仙女本想下凡寻找心爱玉貂，并一心爱上了前朝落寞王子；五仙女只为一句心底誓言而寻找被打落凡间的雪麟童；寻找姐姐们鼓足勇气走入凡间的六仙女，生性胆小怕事，最终竟然爱上了与天庭抗争的火龙子；七妹则依旧与她的董郎在人间缠绵。这下可气坏了玉帝王母，各路神仙集体下凡，制造了一幕幕啼笑皆非的喜剧故事。意大利文艺复兴时期，英俊的艺术家兼工匠莱昂纳多·达·芬奇（汤姆·莱利Tom Riley 饰）正值青少年华，虽然个性傲慢，却有一颗聪明的脑袋。时下，他正受到佛罗伦萨共和国执政官洛伦佐（艾略特·科万 Elliot Cowan 饰）所托制造复活节庆典装置。因杰出表现荣升为军事工程师。同时，达·芬奇和洛伦佐的情妇卢克蕾齐娅·多纳蒂（劳拉·哈德克 Laura Haddock 饰）有了私情。一位神秘的土耳其人告诉他必须寻找一本神秘书籍——《叶之书》。而因为这本书，教皇的侄子，兼得力助手——吉罗拉莫·里亚里奥伯爵（布莱克·瑞特森 Blake Ritson 饰）也从梵蒂冈来到佛罗伦萨......男主之前是射击运动员，生活所迫不得不做了杀手，做了杀手之后有个棘手的任务，是杀前女友的妹妹，就是女主，男主该如何抉择,剧情该如何展开,我们拭目以待。一姐时隔两年再次出山搭Mik，期待火花碰撞，摩擦摩擦~~爹就想着，不管你娘嫁给谁，只要她高兴，爹就喜欢。