1/*	$FreeBSD$	*/
2
3/*
4 * Copyright (C) 2012 by Darren Reed.
5 *
6 * See the IPFILTER.LICENCE file for details on licencing.
7 *
8 * $Id$
9 */
10
11#include <sys/ioctl.h>
12#include <fcntl.h>
13
14#include "ipf.h"
15#include "netinet/ipl.h"
16
17int checkrev(ipfname)
18	char *ipfname;
19{
20	static int vfd = -1;
21	struct friostat fio;
22	ipfobj_t obj;
23
24	bzero((caddr_t)&obj, sizeof(obj));
25	obj.ipfo_rev = IPFILTER_VERSION;
26	obj.ipfo_size = sizeof(fio);
27	obj.ipfo_ptr = (void *)&fio;
28	obj.ipfo_type = IPFOBJ_IPFSTAT;
29
30	if ((vfd == -1) && ((vfd = open(ipfname, O_RDONLY)) == -1)) {
31		perror("open device");
32		return -1;
33	}
34
35	if (ioctl(vfd, SIOCGETFS, &obj)) {
36		ipferror(vfd, "ioctl(SIOCGETFS)");
37		close(vfd);
38		vfd = -1;
39		return -1;
40	}
41
42	if (strncmp(IPL_VERSION, fio.f_version, sizeof(fio.f_version))) {
43		return -1;
44	}
45	return 0;
46}
47