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The Validator class, here as the Context, is responsible for receiving the user's request and delegating it to the strategys object. In the above code, we first create a Validator object, and then add some validation rules to the Validator object through the validator.add method. The validator.add method receives 3 parameters, as follows:A TCP connection is a quad, and a connection is uniquely determined by the source IP, the source port, the destination IP and the destination port. Therefore, if C wants to forge the packet from A to B, it should fill in the above-mentioned IP header and TCP header with the source IP, source port, target IP and target port. Here B is the server, IP and port are open, A is the target we want to attack, IP certainly knows, but the source port of A is not clear, because it may be randomly generated by A. Of course, if we can find out the rule of generating source port for common OS such as Windows and Linux, we can still do it. In addition, we can step on the connection port of Car A through a large number of controlled hosts.一位女警因公殉职，灵魂穿越到一个燕北朝王朝，附身在一位将军府庶出小姐楼兮瑾身上。这位不受待见的庶出小姐此时已被赶出家门，母亲也在颠沛中去世。被千机府的将军李林中收养，她也因此加入千机府做了千机卫，也算是重操旧业。铛铛铛。林聪和王管家走出果林，只见一个老汉和一个中年汉子正蹲在一块山石旁，从篮子里往外拿砂锅和碗筷，准备吃饭，香儿站在一旁跟他们说话。If the wolf's King Jin does not let go, it will really be useless. It is expensive and difficult to use. Its cost performance is not as good as that of kites and far less than that of dragons.20年前著名心理学家欧阳秋和好友兼同事的阮昊天（刘骐饰），前往黎明城一起参与一项秘密的研究项目，但是在研究过程中不知发生了何种变故，最终欧阳秋离奇坠楼而死，好友阮昊天（刘骐饰）也如人间蒸发一般神秘失踪，研究项目随即被叫停。