如何获取MAC地址

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于 2009-03-02 18:04:00 发布

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分类专栏： linux系统编程文章标签： socket struct interface stream

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如何获取MAC地址

/*      get the hardware address of the interface              */

         int sockfd;
   struct ifreq req;
         unsigned char hwaddr[ETH_ALEN];

   if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
           fputs("socket error!/n", stderr);
            exit (1);
       }

   bcopy("eth0", req.ifr_name, IFNAMSIZ);

   if (ioctl(sockfd, SIOCGIFHWADDR, &req) < 0) {
       fputs("Ioctl error!/n", stderr);
       exit(1);
   }

   bcopy(((struct sockaddr *)&req.ifr_hwaddr)->sa_data, hwaddr, ETH_ALEN);
         close(sockfd);

/*       Print the MAC address in xx:xx:xx:xx:xx:xx format    */
         printf("%02x:%02x:%02x:%02x:%02x:%02x/n", *hwaddr, *(hwaddr+1),
                 *(hwaddr+2), *(hwaddr+3), *(hwaddr+4), *(hwaddr+5));