熟悉Linux环境下基本的RAW socket 编程，可以对以太网帧进行初步分析，可以通过程序完成第一个程序中对应的不同参差PDU字段分析，修改和重新发送-Familiar with the Linux environment, the basic RAW socket programming, you can conduct a preliminary analysis of the Ethernet frame can be completed through the program the