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