1/* $FreeBSD$ */ 2 3/* 4 * Copyright (C) 2003 by Darren Reed. 5 * 6 * See the IPFILTER.LICENCE file for details on licencing. 7 */ 8#if !defined(lint) 9static const char rcsid[] = "@(#)$Id: nat_setgroupmap.c,v 1.1.4.1 2006/06/16 17:21:07 darrenr Exp $"; 10#endif 11 12#include "ipf.h" 13 14void nat_setgroupmap(n) 15ipnat_t *n; 16{ 17 if (n->in_outmsk == n->in_inmsk) 18 n->in_ippip = 1; 19 else if (n->in_flags & IPN_AUTOPORTMAP) { 20 n->in_ippip = ~ntohl(n->in_inmsk); 21 if (n->in_outmsk != 0xffffffff) 22 n->in_ippip /= (~ntohl(n->in_outmsk) + 1); 23 n->in_ippip++; 24 if (n->in_ippip == 0) 25 n->in_ippip = 1; 26 n->in_ppip = USABLE_PORTS / n->in_ippip; 27 } else { 28 n->in_space = USABLE_PORTS * ~ntohl(n->in_outmsk); 29 n->in_nip = 0; 30 if (!(n->in_ppip = n->in_pmin)) 31 n->in_ppip = 1; 32 n->in_ippip = USABLE_PORTS / n->in_ppip; 33 } 34} 35