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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.一个女人和已故丈夫仅存的联系是她的老式车，但三十年后的今天，她面临着出售这辆汽车的艰难选择，卖掉车就意味着永别旧爱。姑娘身子不好，不敢上去劝。For example, first define a function, which has three methods, namely win, lose and die. As long as a player dies, the game is over and its opponent needs to be informed of victory. The code needs to be written as follows:这部描写女排运动员刻苦训练、顽强拼争的电视剧在八十年代产生了巨大影响。小鹿纯子以“晴空霹雳”、“幻影旋风”等带有魔幻色彩的打球技巧，使排球这项体育风行一时。她们的精湛球技与顽强拼搏的精神打动了无数观众的心。　　“魔高一尺，道高一丈”，与此同时，警方已密切注意这股强劲的黑势力，并进行追踪调查，乔云风万万没有想到自己最信任，最亲密的女人却是自己身败名裂的底牌……碧血洒南疆，捐躯为谁，为国威军威振奋，青春献边关，幸福何在，在千家万户团圆。电视剧以越南自卫反击战为背景展开故事。 童川和江曼插队时相爱。童川参军后入新兵连集训时，由于枪走火误伤他人，被判刑两年，江曼回城后日想夜盼，但等到却是一填封“绝情信”。在邻居的热心介绍和母亲的一再催促下，江曼被迫与军官林大林结识，林爱上江曼，但是江难忘旧情又不忍言明，婚礼之际，童川被提前释放回京，他临行前写给江曼的信恰巧被林大林看到，大林感到受了极大的侮辱，愤然离去。 对越自卫还击开始了，童川由北京部队补充到昆明部队，正巧分在林大林连里当战士。在铁血生死关头，两个男子汉摒弃宿怨，林大林火线战死后，江曼出于负疚和补偿，毅然参军，来到大林生前连队，担任野战救护所护士长，童、江重逢，虽旧情如故，但前有敌军，后是战友尸骨…… 童川率部坚守四号高地时，双眼被炸瞎。江曼日夜守护，发誓再不分离，子夜，沉寂的都市中，行进着威武的凯旋大军。