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49 lines
850 B
C
49 lines
850 B
C
/* $NetBSD: fill6bits.c,v 1.2 2012/07/22 14:27:36 darrenr Exp $ */
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/*
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* Copyright (C) 2012 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: fill6bits.c,v 1.1.1.2 2012/07/22 13:44:38 darrenr Exp $
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*/
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#include "ipf.h"
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void fill6bits(bits, msk)
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int bits;
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u_int *msk;
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{
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if (bits == 0) {
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msk[0] = 0;
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msk[1] = 0;
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msk[2] = 0;
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msk[3] = 0;
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return;
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}
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msk[0] = 0xffffffff;
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msk[1] = 0xffffffff;
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msk[2] = 0xffffffff;
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msk[3] = 0xffffffff;
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if (bits == 128)
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return;
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if (bits > 96) {
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msk[3] = htonl(msk[3] << (128 - bits));
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} else if (bits > 64) {
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msk[3] = 0;
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msk[2] = htonl(msk[2] << (96 - bits));
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} else if (bits > 32) {
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msk[3] = 0;
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msk[2] = 0;
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msk[1] = htonl(msk[1] << (64 - bits));
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} else {
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msk[3] = 0;
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msk[2] = 0;
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msk[1] = 0;
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msk[0] = htonl(msk[0] << (32 - bits));
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}
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}
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