获取主机MAC地址

获取主机MAC地址的代码:

 

#include
#include
#include
#include
#include
#include
#include

int main()
{
    struct ifreq ifr;
    int sock;
    unsigned char *ptr;
    int status;

    strcpy (ifr.ifr_name , "eth0");

    sock = socket (PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
    if (sock == -1)
    {
        perror ("socket error ");
        return -1;
    }

    status = ioctl (sock, SIOCGIFHWADDR, &ifr);
    if (status < 0)
    {
        perror ("ioctl error ");
        close (sock);
        return -2;
    }

    ptr = ifr.ifr_hwaddr.sa_data;
    printf("%02x.%02x.%02x.%02x.%02x.%02x\n",
            ptr[0], ptr[1],ptr[2],ptr[3],ptr[4],ptr[5]);
}