/*
 * Copyright (C) 2012 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * $Id$
 */

#include <sys/ioctl.h>
#include <fcntl.h>

#include "ipf.h"
#include "netinet/ipl.h"

int
checkrev(char *ipfname)
{
        static int vfd = -1;
        struct friostat fio;
        ipfobj_t obj;

        bzero((caddr_t)&obj, sizeof(obj));
        obj.ipfo_rev = IPFILTER_VERSION;
        obj.ipfo_size = sizeof(fio);
        obj.ipfo_ptr = (void *)&fio;
        obj.ipfo_type = IPFOBJ_IPFSTAT;

        if ((vfd == -1) && ((vfd = open(ipfname, O_RDONLY)) == -1)) {
                perror("open device");
                return (-1);
        }

        if (ioctl(vfd, SIOCGETFS, &obj)) {
                ipferror(vfd, "ioctl(SIOCGETFS)");
                close(vfd);
                vfd = -1;
                return (-1);
        }

        if (strncmp(IPL_VERSION, fio.f_version, sizeof(fio.f_version))) {
                return (-1);
        }
        return (0);
}