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For the convenience of the experiment, we directly use the functions in libc.so.6 as the attack functions to be executed. This is a C program runtime in Linux, which holds a large number of available functions and contains system ("/bin/sh"). Therefore, we can use ROPgadget tool to obtain the code fragments that we can exploit, and use pwntool to exploit the vulnerabilities of vulnerable programs, thus achieving our attack purpose, that is, running system ("/bin/sh"). In order to facilitate the subsequent use of ROPgadget tool to find gadget and attack, it is necessary to copy the libc.so.6 file to the operation directory. First, use the "ldd" command to view the source directory, and then use the "cp" command to copy it to the operation directory.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.Note: He is an Indian national cricket player, not a Bollywood movie star.但是刘沛公，未来的汉高祖，所以注定了不寻常，故而很快从此事中嗅出些别的东西。　　出镜的名人包括奥普拉·温弗瑞、格洛丽亚·斯泰纳姆、珍·古道尔、斯派克·李、林-曼努尔·米兰达、斯蒂夫·旺达、亚历山德拉·莱斯曼、雅拉·沙希迪等。Also, you can register multiple delegates for an event with + =.你不也救了我好多次么，要不咱们来算算？泥鳅和李敬文含笑看着他们兄妹不语。