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 "ipf.h"
12
13
14void fill6bits(bits, msk)
15	int bits;
16	u_int *msk;
17{
18	if (bits == 0) {
19		msk[0] = 0;
20		msk[1] = 0;
21		msk[2] = 0;
22		msk[3] = 0;
23		return;
24	}
25
26	msk[0] = 0xffffffff;
27	msk[1] = 0xffffffff;
28	msk[2] = 0xffffffff;
29	msk[3] = 0xffffffff;
30
31	if (bits == 128)
32		return;
33	if (bits > 96) {
34		msk[3] = htonl(msk[3] << (128 - bits));
35	} else if (bits > 64) {
36		msk[3] = 0;
37		msk[2] = htonl(msk[2] << (96 - bits));
38	} else if (bits > 32) {
39		msk[3] = 0;
40		msk[2] = 0;
41		msk[1] = htonl(msk[1] << (64 - bits));
42	} else {
43		msk[3] = 0;
44		msk[2] = 0;
45		msk[1] = 0;
46		msk[0] = htonl(msk[0] << (32 - bits));
47	}
48}
49