/*
 * Copyright (C) 2002 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include "ipf.h"

int ntomask(v, nbits, ap)
int v, nbits;
u_32_t *ap;
{
        u_32_t mask;

        if (nbits < 0)
                return -1;

        switch (v)
        {
        case 4 :
                if (nbits > 32 || use_inet6 != 0)
                        return -1;
                if (nbits == 0) {
                        mask = 0;
                } else {
                        mask = 0xffffffff;
                        mask <<= (32 - nbits);
                }
                *ap = htonl(mask);
                break;

        case 6 :
                if (nbits > 128)
                        return -1;
                fill6bits(nbits, ap);
                break;

        default :
                return -1;
        }
        return 0;
}