vlan_ioctl
error = vlan_ioctl(ifp, SIOCSVNETID, (caddr_t)&req);
error = vlan_ioctl(ifp, SIOCSIFPARENT, (caddr_t)&parent);
return (vlan_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&req));
int vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr);
ifp->if_ioctl = vlan_ioctl;
return (vlan_ioctl(ifp, SIOCDIFPARENT, (caddr_t)ifr));