参考链接：
https://www.nsnam.org/docs/release/3.12/doxygen/classns3_1_1_packet.html#details
NS-3如何把字符串写入到数据包内_Kevin Wang的博客-CSDN博客
ASCII码字符对照表
https://blog.csdn.net/wz947324/article/details/80076496#commentBox
其他相关链接
https://blog.csdn.net/Mary19920410/article/details/71425104?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_title~default-0.queryctr&spm=1001.2101.3001.4242.1&utm_relevant_index=2
https://blog.csdn.net/information_seeker/article/details/103549631#commentBox
https://blog.csdn.net/ziseshamo102/article/details/51030863?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_title~default-1.no_search_link&spm=1001.2101.3001.4242.2&utm_relevant_index=3#commentBox
https://blog.csdn.net/qq_42824983/article/details/118945074?spm=1001.2101.3001.6650.2&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7Edefault-2.queryctr&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7Edefault-2.queryctr&utm_relevant_index=4
