IPI2MODE
ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), ipsq);
ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL);
ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL);
ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL);
ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), ipsq);