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#include "protocol.h"

int get_mac_addr(char *arg, char *mac)
{
    int sock;
    struct ifreq ifr;
    uint8_t mac_addr[6] = {0,};

    if((sock = socket(PF_INET,SOCK_STREAM, 0)) < 0)
    {
        perror("socket ");
        return -1;
    }

    strcpy(ifr.ifr_name, arg);
    if(ioctl(sock, SIOCGIFHWADDR, &ifr) < 0)
    {
        perror("ioctl() - get mac");
        close(sock);
        return -1;
    }

    memcpy(mac, ifr.ifr_hwaddr.sa_data, 6);

    close(sock);
    return 0;
}