ethereal的早期版本，代码量大大少于新版本，支持协议比较少，但是框架与现在的新版本类似，是开发者入手的好方法。-the early version, code significantly less than the new version, supporting the agreement is relatively small, But now with the framework of the new version of a similar, developers start wit

这是一个关于ethereal的作业！ -This is a job on the ethereal!