ＰＩＮＧ程序源码有记录路由功能,这个程序解析了PING功能实际的处理实现，大家剖析了他，也就对icmp协议有了更深的了解。-PING record procedures source routing functions, the analytical procedures PING function of the actual handling realized, we analyze him, right icmp agreement also gained a deeper understa