int ethtool_set_speed(int fd, const char *ifname, unsigned int speed, Duplex duplex);
int ethtool_set_wol(int fd, const char *ifname, WakeOnLan wol);
int ethtool_set_speed(int fd, const char *ifname, unsigned int speed, Duplex duplex);
int ethtool_set_wol(int fd, const char *ifname, WakeOnLan wol);