47 lines
703 B
C
47 lines
703 B
C
/* $NetBSD: ntomask.c,v 1.1.1.3 2010/04/17 20:45:58 darrenr Exp $ */
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/*
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* Copyright (C) 2002-2005 by Darren Reed.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*
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* Id: ntomask.c,v 1.6.2.2 2009/12/27 06:58:06 darrenr Exp
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*/
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#include "ipf.h"
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int ntomask(v, nbits, ap)
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int v, nbits;
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u_32_t *ap;
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{
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u_32_t mask;
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if (nbits < 0)
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return -1;
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switch (v)
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{
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case 4 :
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if (nbits > 32 || use_inet6 != 0)
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return -1;
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if (nbits == 0) {
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mask = 0;
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} else {
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mask = 0xffffffff;
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mask <<= (32 - nbits);
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}
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*ap = htonl(mask);
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break;
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case 6 :
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if ((nbits > 128) || (use_inet6 == 0))
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return -1;
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fill6bits(nbits, ap);
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break;
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default :
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return -1;
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}
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return 0;
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}
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