strncpy (ifr.ifr_name, tm->tun_name, sizeof (ifr.ifr_name) - 1);
ifr.ifr_flags = flags;
if (ioctl (tm->dev_net_tun_fd, TUNSETIFF, (void *) &ifr) < 0)
strncpy (ifr.ifr_name, tm->tun_name, sizeof (ifr.ifr_name) - 1);
ifr.ifr_flags = flags;
if (ioctl (tm->dev_net_tun_fd, TUNSETIFF, (void *) &ifr) < 0)