ifhwioctl
return (ifhwioctl(SIOCSIFFLAGS, vf_ifp, (caddr_t)&ifr, curthread));
error = ifhwioctl(SIOCGIFRSSKEY, vf_ifp, (caddr_t)&ifrk, curthread);
error = ifhwioctl(SIOCGIFRSSHASH, vf_ifp, (caddr_t)&ifrh, curthread);
error = ifhwioctl(SIOCSIFMTU, vf_ifp, (caddr_t)&ifr, curthread);
error = ifhwioctl(SIOCSIFMTU, vf_ifp,
error = ifhwioctl(cmd, vf_ifp, data, curthread);
error = ifhwioctl(cmd, ifp, data, td);
error = ifhwioctl(SIOCSIFMTU, TUN2IFP(tp),
int ifhwioctl(u_long, if_t, caddr_t, struct thread *);
error = ifhwioctl(SIOCSIFMTU, ifp, (char *)&ifr,
error = ifhwioctl(SIOCSIFMTU, ifp, (caddr_t)&ifr, curthread);