1 files changed, 34 insertions, 0 deletions
diff --git a/contrib/ipfilter/lib/nat_setgroupmap.c b/contrib/ipfilter/lib/nat_setgroupmap.c
new file mode 100644
index 0000000..15c21f6
--- /dev/null
+++ b/contrib/ipfilter/lib/nat_setgroupmap.c
@@ -0,0 +1,34 @@
+/*	$FreeBSD$	*/
+
+/*
+ * Copyright (C) 2012 by Darren Reed.
+ *
+ * See the IPFILTER.LICENCE file for details on licencing.
+ */
+#if !defined(lint)
+static const char rcsid[] = "@(#)$Id$";
+#endif
+
+#include "ipf.h"
+
+void nat_setgroupmap(n)
+	ipnat_t *n;
+{
+	if (n->in_nsrcmsk == n->in_osrcmsk)
+		n->in_ippip = 1;
+	else if (n->in_flags & IPN_AUTOPORTMAP) {
+		n->in_ippip = ~ntohl(n->in_osrcmsk);
+		if (n->in_nsrcmsk != 0xffffffff)
+			n->in_ippip /= (~ntohl(n->in_nsrcmsk) + 1);
+		n->in_ippip++;
+		if (n->in_ippip == 0)
+			n->in_ippip = 1;
+		n->in_ppip = USABLE_PORTS / n->in_ippip;
+	} else {
+		n->in_space = USABLE_PORTS * ~ntohl(n->in_nsrcmsk);
+		n->in_snip = 0;
+		if (!(n->in_ppip = n->in_spmin))
+			n->in_ppip = 1;
+		n->in_ippip = USABLE_PORTS / n->in_ppip;
+	}
+}