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/* $FreeBSD$ */
/*
* Copyright (C) 1993-2001 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* $Id: fill6bits.c,v 1.5 2002/03/27 15:09:57 darrenr Exp $
*/
#include "ipf.h"
void fill6bits(bits, msk)
int bits;
u_int *msk;
{
if (bits == 0) {
msk[0] = 0;
msk[1] = 0;
msk[2] = 0;
msk[3] = 0;
return;
}
msk[0] = 0xffffffff;
msk[1] = 0xffffffff;
msk[2] = 0xffffffff;
msk[3] = 0xffffffff;
if (bits == 128)
return;
if (bits > 96) {
msk[3] = htonl(msk[3] << (128 - bits));
} else if (bits > 64) {
msk[3] = 0;
msk[2] = htonl(msk[2] << (96 - bits));
} else if (bits > 32) {
msk[3] = 0;
msk[2] = 0;
msk[1] = htonl(msk[1] << (64 - bits));
} else {
msk[3] = 0;
msk[2] = 0;
msk[1] = 0;
msk[0] = htonl(msk[0] << (32 - bits));
}
}
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