#include //for struct ifreq

int get_mac(char * mac, int len_limit) //返回值是實際寫入char * mac的字符個數(shù)(不包括'\0')

{

struct ifreq ifreq; //ifreq結構體常用來配置和獲取ip地址

int sock;

if ((sock = socket (AF_INET, SOCK_STREAM, 0)) < 0)

{

perror ("socket");

return -1;

}

strcpy (ifreq.ifr_name, "eth0"); //Currently, only get eth0

if (ioctl (sock, SIOCGIFHWADDR, &ifreq) < 0)

{

perror ("ioctl");

return -1;

}

return snprintf (mac, len_limit, "%X:%X:%X:%X:%X:%X", (unsigned char) ifreq.ifr_hwaddr.sa_data[0], (unsigned char) ifreq.ifr_hwaddr.sa_data[1], (unsigned char) ifreq.ifr_hwaddr.sa_data[2], (unsigned char) ifreq.ifr_hwaddr.sa_data[3], (unsigned char) ifreq.ifr_hwaddr.sa_data[4], (unsigned char) ifreq.ifr_hwaddr.sa_data[5]);

}

int main()

{

char szMac[18];

int nRtn = get_mac(szMac, sizeof(szMac));

if(nRtn > 0)

{

fprintf(stderr, "MAC ADDR: %s\n", szMac);

}

return 0;

}

總結

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