checkrev.c revision 302408 
1217309Snwhitehorn/*	$FreeBSD: stable/11/contrib/ipfilter/lib/checkrev.c 255332 2013-09-06 23:11:19Z cy $	*/
2224014Snwhitehorn
3217309Snwhitehorn/*
4217309Snwhitehorn * Copyright (C) 2012 by Darren Reed.
5217309Snwhitehorn *
6224014Snwhitehorn * See the IPFILTER.LICENCE file for details on licencing.
7217309Snwhitehorn *
8217309Snwhitehorn * $Id$
9217309Snwhitehorn */
10217309Snwhitehorn
11217309Snwhitehorn#include <sys/ioctl.h>
12217309Snwhitehorn#include <fcntl.h>
13217309Snwhitehorn
14217309Snwhitehorn#include "ipf.h"
15217309Snwhitehorn#include "netinet/ipl.h"
16217309Snwhitehorn
17217309Snwhitehornint checkrev(ipfname)
18217309Snwhitehorn	char *ipfname;
19217309Snwhitehorn{
20217309Snwhitehorn	static int vfd = -1;
21217309Snwhitehorn	struct friostat fio;
22217309Snwhitehorn	ipfobj_t obj;
23217309Snwhitehorn
24217309Snwhitehorn	bzero((caddr_t)&obj, sizeof(obj));
25217309Snwhitehorn	obj.ipfo_rev = IPFILTER_VERSION;
26217309Snwhitehorn	obj.ipfo_size = sizeof(fio);
27217309Snwhitehorn	obj.ipfo_ptr = (void *)&fio;
28217309Snwhitehorn	obj.ipfo_type = IPFOBJ_IPFSTAT;
29217309Snwhitehorn
30217309Snwhitehorn	if ((vfd == -1) && ((vfd = open(ipfname, O_RDONLY)) == -1)) {
31217309Snwhitehorn		perror("open device");
32217309Snwhitehorn		return -1;
33217309Snwhitehorn	}
34217309Snwhitehorn
35217309Snwhitehorn	if (ioctl(vfd, SIOCGETFS, &obj)) {
36217309Snwhitehorn		ipferror(vfd, "ioctl(SIOCGETFS)");
37217309Snwhitehorn		close(vfd);
38217309Snwhitehorn		vfd = -1;
39217309Snwhitehorn		return -1;
40217309Snwhitehorn	}
41217309Snwhitehorn
42217309Snwhitehorn	if (strncmp(IPL_VERSION, fio.f_version, sizeof(fio.f_version))) {
43217309Snwhitehorn		return -1;
44217309Snwhitehorn	}
45217309Snwhitehorn	return 0;
46217309Snwhitehorn}
47217309Snwhitehorn