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In addition to solving the port problem of A, the serial number problem also needs to be paid attention to. The serial number corresponds to the sliding window. The fake TCP packet needs to be filled with the serial number. If the value of the serial number is not in the sliding window of B when it is sent to B before A, B will actively discard it. So we need to find the serial number that can fall into the sliding window between AB at that time. This can be solved violently, because the length of a sequence is 32 bits, and the value range is 0-4294967296. If the window size is like 65535 under Windows I caught in the above figure, I only need to divide, and I know that at most I only need to send 65537 (4294967296/65535=65537) packets to have a sequence number fall into the sliding window. The desired value can be calculated quickly by exhaustion on multiple control hosts.　　清白无罪者前往天堂，罪孽深重者落入地狱。民国初年，鱼龙混杂、三教九流聚集的黑桃城出了件蹊跷事：青楼“人间天上”的头牌艺人、才貌双绝的春天姑娘莫名其妙地失踪了，一时间众说纷纭。实际上，春天是被为富不仁的地主王大猫霸占，欲娶为小老婆。王大猫此前曾有过七房姨太太，奇怪的是除了大太太红桃，其余的都是短命鬼。死因各不相同，结果只有一个……春天姑娘自打进了地主家，瞬间便命悬一线，岌岌可危。　　他越狱、抢车、私闯民宅、提刀杀人，却最终收获爱情。一个以山而著称，以雾而闻名的城市，正悄然酝酿一出五味杂陈的悲情大戏。 　　虞姬早已泪流满面，泣不成声，强撑着走过来。Track and field is the oldest sport in sports.