如何從Linux系統抓MAC Address

在Linux 平台上面，可以使用ioctl的方式來得知網路的的MAC Address.

-----------------------

#include 

#include  /* for strncpy */

#include 
#include 
#include 
#include 
#include 

int
main()
{
int fd;
struct ifreq ifr;

fd = socket(AF_INET, SOCK_DGRAM, 0);

ifr.ifr_addr.sa_family = AF_INET;
strncpy(ifr.ifr_name, "eth0", IFNAMSIZ-1);

ioctl(fd, SIOCGIFHWADDR, &ifr);

close(fd);

/* display result */
printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
        (unsigned char)ifr.ifr_hwaddr.sa_data[0],
        (unsigned char)ifr.ifr_hwaddr.sa_data[1],
        (unsigned char)ifr.ifr_hwaddr.sa_data[2],
        (unsigned char)ifr.ifr_hwaddr.sa_data[3],
        (unsigned char)ifr.ifr_hwaddr.sa_data[4],
        (unsigned char)ifr.ifr_hwaddr.sa_data[5]);

return 0;
}

Ref http://www.geekpage.jp/en/programming/linux-network/get-macaddr.php