On Tue, 10 Oct 2017 12:58:52 +0530
Christina Jacob <christina.jacob.koik...@gmail.com> wrote:
> +/* Get the mac address of the interface given interface name */
> +static long *getmac(char *iface)
> +{
> + int fd;
> + struct ifreq ifr;
> + long *mac = NULL;
> +
> + fd = socket(AF_INET, SOCK_DGRAM, 0);
> + ifr.ifr_addr.sa_family = AF_INET;
> + strncpy(ifr.ifr_name, iface, IFNAMSIZ - 1);
> + ioctl(fd, SIOCGIFHWADDR, &ifr);
> + mac = (long *)ifr.ifr_hwaddr.sa_data;
> + close(fd);
> + return mac;
Always check return value of ioctl.
You are assuming sizeof(long) > 6 bytes.
Also the byte order.
