lib/common/nat_setgroupmap.c

	nat_setgroupmap.c revision 9b4c7145ee086c5c8c0a98485972103e5730e346
/*
 * Copyright (C) 1993-2001 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#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;
    }
}