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/* $FreeBSD: src/contrib/ipfilter/lib/nat_setgroupmap.c,v 1.4.14.1 2010/12/21 17:10:29 kensmith Exp $ */
/*
* Copyright (C) 2003 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*/
#if !defined(lint)
static const char rcsid[] = "@(#)$Id: nat_setgroupmap.c,v 1.1.4.1 2006/06/16 17:21:07 darrenr Exp $";
#endif
#include "ipf.h"
void nat_setgroupmap(n)
ipnat_t *n;
{
if (n->in_outmsk == n->in_inmsk)
n->in_ippip = 1;
else if (n->in_flags & IPN_AUTOPORTMAP) {
n->in_ippip = ~ntohl(n->in_inmsk);
if (n->in_outmsk != 0xffffffff)
n->in_ippip /= (~ntohl(n->in_outmsk) + 1);
n->in_ippip++;
if (n->in_ippip == 0)
n->in_ippip = 1;
n->in_ppip = USABLE_PORTS / n->in_ippip;
} else {
n->in_space = USABLE_PORTS * ~ntohl(n->in_outmsk);
n->in_nip = 0;
if (!(n->in_ppip = n->in_pmin))
n->in_ppip = 1;
n->in_ippip = USABLE_PORTS / n->in_ppip;
}
}
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