in_gre_ioctl
error = in_gre_ioctl(sc, SIOCSIFPHYADDR, (caddr_t)&aliasreq.in);
if (in_gre_ioctl(sc, SIOCGIFPSRCADDR, (caddr_t)&in) == 0)
if (in_gre_ioctl(sc, SIOCGIFPDSTADDR, (caddr_t)&in) == 0)
error = in_gre_ioctl(sc, cmd, data);
int in_gre_ioctl(struct gre_softc *, u_long, caddr_t);