一篇介绍如何往NS2中实现一个自己的协议的文章，自我感觉很有用，如果想自己修改协议代码或自己编写NS2协议，一定要看的文章,NS2 one describes how to achieve an agreement on their own article, feel useful, if you want to own their own code or to amend the agreement to prepare NS2 agreement depends on the article