基于linux的md5校验源码，可以很方便地移植到各种嵌入式平台，如mips，arm等。-linux-based md5 checksum source can be easily transplanted to various embedded platforms, If mips, arm, and so on.

详细的crc校验源码 编译通过 已经实际应用 请仔细阅读-Detailed crc checksum to compile source code has been adopted for practical application please read carefully

其中的源地址和目的地址是指网卡的硬件地址（也叫MAC地址），长度是48位，是在网卡出厂时固化的。可在shell中使用ifconfig命令查看，“HWaddr 00:15:F2:14:9E:3F”部分就是硬件地址。协议字段有三种值，分别对应IP、ARP、RARP。帧尾是CRC校验码。(The source address and destination address refer to the hardware address of the network card (also known as