1、实现对局域网内ARP请求的响应。

　2、实现对局域网内ICMP的ECHO报文的响应

ICMP_Send_Echo，功能描述：用另外一台主机用ping 命令ping 本主机主机，本主机卸载TCP/IP协议，此时我们编写的程序ICMP_Send_Echo解读Wincap抓到的包，并封装好我们的数据包对另外一台主机回应，另外一台主显示结果能政党ping通，当我们结束ICMP_Send_Echo时，另外一台主机显示为不能ping通。- 1, to realize the LAN ARP requests.

2, to realize the LAN ICMP packets of ECHO s response

ICMP_Send_Echo, Function Descr iption: Use another host with the ping command ping the host host, the host to uninstall TCP/IP protocol, this time we write programs ICMP_Send_Echo reading Wincap captured packets, and a good package, our data packets on another a host response, another one the main political parties, ping displays the results are pass, when we end ICMP_Send_Echo, the other appears as a host can not ping pass.