NS2的一个简单协议源代码，分5个步骤，由易到难的对协议进行扩充，让你熟悉Ns2添加协议的方法-NS2 a simple protocol source code, in five steps, from easy to difficult protocol extension allows you to familiar with NS2 add agreement of

可以在ns2.35版本下正确工作的ping协议，适用于初学者学习ns2.35的协议扩展。-a new ping protocol extension can work correctly in version ns2.35. it s good materials for beginners.

mUDP是UDP的延伸，除了具有UDP的功能外，还能记录所发送的包的信息。mUdpSink可以把接收到的包的信息记录到文件中。(MUDP is an extension of UDP, in addition to having the function of UDP, it can also record the information of the packets sent. MUdpSink can record the information of the received packet