1 files changed, 46 insertions, 0 deletions
diff --git a/contrib/ipfilter/lib/checkrev.c b/contrib/ipfilter/lib/checkrev.c
new file mode 100644
index 0000000..28032ce
--- /dev/null
+++ b/contrib/ipfilter/lib/checkrev.c
@@ -0,0 +1,46 @@
+/*	$NetBSD$	*/
+
+/*
+ * Copyright (C) 1993-2001 by Darren Reed.
+ *
+ * See the IPFILTER.LICENCE file for details on licencing.
+ *
+ * Id: checkrev.c,v 1.12.2.1 2004/03/09 14:44:39 darrenr Exp
+ */
+
+#include <sys/ioctl.h>
+#include <fcntl.h>
+
+#include "ipf.h"
+#include "netinet/ipl.h"
+
+int checkrev(ipfname)
+char *ipfname;
+{
+	static int vfd = -1;
+	struct friostat fio, *fiop = &fio;
+	ipfobj_t ipfo;
+
+	bzero((caddr_t)&ipfo, sizeof(ipfo));
+	ipfo.ipfo_rev = IPFILTER_VERSION;
+	ipfo.ipfo_size = sizeof(*fiop);
+	ipfo.ipfo_ptr = (void *)fiop;
+	ipfo.ipfo_type = IPFOBJ_IPFSTAT;
+
+	if ((vfd == -1) && ((vfd = open(ipfname, O_RDONLY)) == -1)) {
+		perror("open device");
+		return -1;
+	}
+
+	if (ioctl(vfd, SIOCGETFS, &ipfo)) {
+		perror("ioctl(SIOCGETFS)");
+		close(vfd);
+		vfd = -1;
+		return -1;
+	}
+
+	if (strncmp(IPL_VERSION, fio.f_version, sizeof(fio.f_version))) {
+		return -1;
+	}
+	return 0;
+}