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46 lines
715 B
C
46 lines
715 B
C
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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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* $Id$
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*/
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#include "ipf.h"
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void
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fill6bits(int bits, 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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