1 files changed, 46 insertions, 0 deletions

diff --git a/lib/fill6bits.c b/lib/fill6bits.c
new file mode 100644
index 0000000000000..a5f459a28af0c
--- /dev/null
+++ b/lib/fill6bits.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2000-2002 by Darren Reed.
+ *
+ * See the IPFILTER.LICENCE file for details on licencing.
+ *
+ * $Id: fill6bits.c,v 1.5.4.1 2006/06/16 17:20:58 darrenr Exp $
+ */
+
+#include "ipf.h"
+
+
+void fill6bits(bits, msk)
+int bits;
+u_int *msk;
+{
+	if (bits == 0) {
+		msk[0] = 0;
+		msk[1] = 0;
+		msk[2] = 0;
+		msk[3] = 0;
+		return;
+	}
+
+	msk[0] = 0xffffffff;
+	msk[1] = 0xffffffff;
+	msk[2] = 0xffffffff;
+	msk[3] = 0xffffffff;
+
+	if (bits == 128)
+		return;
+	if (bits > 96) {
+		msk[3] = htonl(msk[3] << (128 - bits));
+	} else if (bits > 64) {
+		msk[3] = 0;
+		msk[2] = htonl(msk[2] << (96 - bits));
+	} else if (bits > 32) {
+		msk[3] = 0;
+		msk[2] = 0;
+		msk[1] = htonl(msk[1] << (64 - bits));
+	} else {
+		msk[3] = 0;
+		msk[2] = 0;
+		msk[1] = 0;
+		msk[0] = htonl(msk[0] << (32 - bits));
+	}
+}