476     struct ifreq ifr = {  in setCfg()  local
479     strlcpy(ifr.ifr_name, cfg.ifName.c_str(), IFNAMSIZ);  in setCfg()
483     RETURN_IF_NOT_OK(sys.ioctl(fd, SIOCSIFADDR, &ifr));  in setCfg()
486         RETURN_IF_NOT_OK(sys.ioctl(fd, SIOCGIFFLAGS, &ifr));  in setCfg()
487         uint16_t flags = ifr.ifr_flags;  in setCfg()
491                 ifr.ifr_flags = ifr.ifr_flags | IFF_UP;  in setCfg()
493                 ifr.ifr_flags = (ifr.ifr_flags & (~IFF_UP));  in setCfg()
497         if (ifr.ifr_flags != flags) {  in setCfg()
498             RETURN_IF_NOT_OK(sys.ioctl(fd, SIOCSIFFLAGS, &ifr));  in setCfg()
519     struct ifreq ifr = {};  in getCfg()  local
520     strlcpy(ifr.ifr_name, ifName.c_str(), IFNAMSIZ);  in getCfg()
522     if (isOk(sys.ioctl(fd, SIOCGIFADDR, &ifr))) {  in getCfg()
523         addr.s_addr = ((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr;  in getCfg()
526     if (isOk(sys.ioctl(fd, SIOCGIFNETMASK, &ifr))) {  in getCfg()
528                 ipv4NetmaskToPrefixLength(((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr);  in getCfg()
531     if (isOk(sys.ioctl(fd, SIOCGIFFLAGS, &ifr))) {  in getCfg()
532         flags = ifr.ifr_flags;  in getCfg()
537     if (isOk(sys.ioctl(fd, SIOCGIFHWADDR, &ifr))) {  in getCfg()
538         memcpy((void*) hwaddr, &ifr.ifr_hwaddr.sa_data, ETH_ALEN);  in getCfg()