443     struct ifreq ifr = {  in setCfg()  local
446     strlcpy(ifr.ifr_name, cfg.ifName.c_str(), IFNAMSIZ);  in setCfg()
450     RETURN_IF_NOT_OK(sys.ioctl(fd, SIOCSIFADDR, &ifr));  in setCfg()
453         RETURN_IF_NOT_OK(sys.ioctl(fd, SIOCGIFFLAGS, &ifr));  in setCfg()
454         uint16_t flags = ifr.ifr_flags;  in setCfg()
458                 ifr.ifr_flags = ifr.ifr_flags | IFF_UP;  in setCfg()
460                 ifr.ifr_flags = (ifr.ifr_flags & (~IFF_UP));  in setCfg()
464         if (ifr.ifr_flags != flags) {  in setCfg()
465             RETURN_IF_NOT_OK(sys.ioctl(fd, SIOCSIFFLAGS, &ifr));  in setCfg()
486     struct ifreq ifr = {};  in getCfg()  local
487     strlcpy(ifr.ifr_name, ifName.c_str(), IFNAMSIZ);  in getCfg()
489     if (isOk(sys.ioctl(fd, SIOCGIFADDR, &ifr))) {  in getCfg()
490         addr.s_addr = ((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr;  in getCfg()
493     if (isOk(sys.ioctl(fd, SIOCGIFNETMASK, &ifr))) {  in getCfg()
495                 ipv4NetmaskToPrefixLength(((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr);  in getCfg()
498     if (isOk(sys.ioctl(fd, SIOCGIFFLAGS, &ifr))) {  in getCfg()
499         flags = ifr.ifr_flags;  in getCfg()
504     if (isOk(sys.ioctl(fd, SIOCGIFHWADDR, &ifr))) {  in getCfg()
505         memcpy((void*) hwaddr, &ifr.ifr_hwaddr.sa_data, ETH_ALEN);  in getCfg()