TiberianDawn/IPXADDR.CPP

/*
**	Command & Conquer(tm)
**	Copyright 2025 Electronic Arts Inc.
**
**	This program is free software: you can redistribute it and/or modify
**	it under the terms of the GNU General Public License as published by
**	the Free Software Foundation, either version 3 of the License, or
**	(at your option) any later version.
**
**	This program is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**	GNU General Public License for more details.
**
**	You should have received a copy of the GNU General Public License
**	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/* $Header:   F:\projects\c&c\vcs\code\ipxaddr.cpv   2.17   16 Oct 1995 16:50:58   JOE_BOSTIC  $ */
/***************************************************************************
 **   C O N F I D E N T I A L --- W E S T W O O D    S T U D I O S        **
 ***************************************************************************
 *                                                                         *
 *                 Project Name : Command & Conquer                        *
 *                                                                         *
 *                    File Name : IPXADDR.CPP                              *
 *                                                                         *
 *                   Programmer : Bill Randolph                            *
 *                                                                         *
 *                   Start Date : December 19, 1994                        *
 *                                                                         *
 *                  Last Update : December 19, 1994   [BR]                 *
 *                                                                         *
 *-------------------------------------------------------------------------*
 * Functions:                                                              *
 *   IPXAddressClass::IPXAddressClass -- class constructor                 *
 *   IPXAddressClass::IPXAddressClass -- class constructor form 2				*
 *   IPXAddressClass::IPXAddressClass -- class constructor form 3				*
 *   IPXAddressClass::Set_Address -- sets the IPX address values        	*
 *   IPXAddressClass::Set_Address -- sets the IPX values from a header		*
 *   IPXAddressClass::Get_Address -- retrieves the IPX address values      *
 *   IPXAddressClass::Get_Address -- copies address into an IPX header		*
 *   IPXAddressClass::Is_Broadcast -- tells if this is a broadcast address *
 *   IPXAddressClass::operator== -- overloaded comparison operator         *
 *   IPXAddressClass::operator!= -- overloaded comparison operator         *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

#include "function.h"
#include "tcpip.h"

/***************************************************************************
 * IPXAddressClass::IPXAddressClass -- class constructor                   *
 *                                                                         *
 * This default constructor generates a broadcast address.						*
 *                                                                         *
 * INPUT:                                                                  *
 *		net		Network Number for this address										*
 *		node		Node Address for this address											*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		none.																						*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
IPXAddressClass::IPXAddressClass(void)
{
	NetworkNumber[0] = 0xff;
	NetworkNumber[1] = 0xff;
	NetworkNumber[2] = 0xff;
	NetworkNumber[3] = 0xff;
	NodeAddress[0] = 0xff;
	NodeAddress[1] = 0xff;
	NodeAddress[2] = 0xff;
	NodeAddress[3] = 0xff;
	NodeAddress[4] = 0xff;
	NodeAddress[5] = 0xff;

}	/* end of IPXAddressClass */


/***************************************************************************
 * IPXAddressClass::IPXAddressClass -- class constructor form 2				*
 *                                                                         *
 * INPUT:                                                                  *
 *		net		Network Number for this address										*
 *		node		Node Address for this address											*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		none.																						*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
IPXAddressClass::IPXAddressClass(NetNumType net, NetNodeType node)
{
	memcpy(NetworkNumber,net,4);
	memcpy(NodeAddress,node,6);

}	/* end of IPXAddressClass */


/***************************************************************************
 * IPXAddressClass::IPXAddressClass -- class constructor form 3				*
 *                                                                         *
 * This form of the constructor takes an IPX header as an argument.  It		*
 * extracts the address from the Source address fields in the header.		*
 *                                                                         *
 * INPUT:                                                                  *
 *		header	Header from which to extract the address							*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		none.																						*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
IPXAddressClass::IPXAddressClass(IPXHeaderType *header)
{
	memcpy(NetworkNumber,header->SourceNetworkNumber,4);
	memcpy(NodeAddress,header->SourceNetworkNode,6);

}	/* end of IPXAddressClass */


/***************************************************************************
 * IPXAddressClass::Set_Address -- sets the IPX address values        		*
 *                                                                         *
 * INPUT:                                                                  *
 *		net		Network Number for this address										*
 *		node		Node Address for this address											*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		none.																						*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
void IPXAddressClass::Set_Address(NetNumType net, NetNodeType node)
{
	memcpy(NetworkNumber,net,4);
	memcpy(NodeAddress,node,6);

}	/* end of Set_Address */


/***************************************************************************
 * IPXAddressClass::Set_Address -- sets the IPX values from a header			*
 *                                                                         *
 * This routine extracts the source addresses from the given IPX header.	*
 *                                                                         *
 * INPUT:                                                                  *
 *		net		Network Number for this address										*
 *		node		Node Address for this address											*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		none.																						*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
void IPXAddressClass::Set_Address(IPXHeaderType *header)
{

#ifdef VIRTUAL_SUBNET_SERVER
	if (Winsock.Get_Connected()){
		memset(NetworkNumber, 1 ,4);
		memset(NodeAddress, 0, 6);
		unsigned short target_mask = *(unsigned short*)header;
		/*
		** If this is a head to head game (no VSS) --
		**  If mask is 0 then this packet was broadcast from the other player
		**  Otherwise exclusive or with 3 to get other players mask
		*/
		if (!UseVirtualSubnetServer){
			if (target_mask == 0){
				target_mask = 1 << PlanetWestwoodIsHost;
			}
			target_mask ^= 3;
		}

		*(unsigned short*) &NodeAddress[0] = target_mask;

	}else{
		memcpy(NetworkNumber,header->SourceNetworkNumber,4);
		memcpy(NodeAddress,header->SourceNetworkNode,6);
	}
#else	//VIRTUAL_SUBNET_SERVER
	if (header){
		memcpy(NetworkNumber,header->SourceNetworkNumber,4);
		memcpy(NodeAddress,header->SourceNetworkNode,6);
	}else{
		/*
		** Address is meaningless when using winsock
		*/
		memset(NetworkNumber, 1 ,4);
		memset(NodeAddress, 1, 6);
	}
#endif //VIRTUAL_SUBNET_SERVER
}	/* end of Set_Address */


/***************************************************************************
 * IPXAddressClass::Get_Address -- retrieves the IPX address values        *
 *                                                                         *
 * INPUT:                                                                  *
 *		net		Network Number for this address										*
 *		node		Node Address for this address											*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		none.																						*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
void IPXAddressClass::Get_Address(NetNumType net, NetNodeType node)
{
	memcpy(net,NetworkNumber,4);
	memcpy(node,NodeAddress,6);

}	/* end of Get_Address */


/***************************************************************************
 * IPXAddressClass::Get_Address -- copies address into an IPX header			*
 *                                                                         *
 * INPUT:                                                                  *
 *		net		Network Number for this address										*
 *		node		Node Address for this address											*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		none.																						*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
void IPXAddressClass::Get_Address(IPXHeaderType *header)
{
	memcpy(header->DestNetworkNumber,NetworkNumber,4);
	memcpy(header->DestNetworkNode,NodeAddress,6);

}	/* end of Get_Address */


/***************************************************************************
 * IPXAddressClass::Is_Broadcast -- tells if this is a broadcast address   *
 *                                                                         *
 * INPUT:                                                                  *
 *		none.																						*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		none.																						*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
bool IPXAddressClass::Is_Broadcast(void)
{
	if (	NetworkNumber[0] == 0xff &&
			NetworkNumber[1] == 0xff &&
			NetworkNumber[2] == 0xff &&
			NetworkNumber[3] == 0xff &&
			NodeAddress[0] == 0xff &&
			NodeAddress[1] == 0xff &&
			NodeAddress[2] == 0xff &&
			NodeAddress[3] == 0xff &&
			NodeAddress[4] == 0xff &&
			NodeAddress[5] == 0xff) {
		return(true);
	} else {
		return(false);
	}
}


/***************************************************************************
 * IPXAddressClass::operator== -- overloaded comparison operator           *
 *                                                                         *
 * Since, if NETX isn't running, the network number on a received packet	*
 * can be bogus (all 0's), only the node address is used for comparison 	*
 * purposes here.																				*
 *                                                                         *
 * INPUT:                                                                  *
 *		addr		address to compare to													*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		0 = not equal, 1 = equal															*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
int IPXAddressClass::operator == (IPXAddressClass & addr)
{
	/*------------------------------------------------------------------------
	If either Network Number is all 0's (which can happen if the system is
	not running NETX), compare only the Node Addresses.
	------------------------------------------------------------------------*/
	if ( (NetworkNumber[0]==0 &&
			NetworkNumber[1]==0 &&
			NetworkNumber[2]==0 &&
			NetworkNumber[3]==0) ||
		  (addr.NetworkNumber[0]==0 &&
			addr.NetworkNumber[1]==0 &&
			addr.NetworkNumber[2]==0 &&
			addr.NetworkNumber[3]==0) ) {

		if (memcmp(NodeAddress,addr.NodeAddress,6)==0) {
			return(true);
		} else {
			return(false);
		}

	} else {

		/*------------------------------------------------------------------------
		Otherwise, compare both the Network Numbers and Node Addresses
		------------------------------------------------------------------------*/
		if (memcmp(NodeAddress,addr.NodeAddress,6)==0 && memcmp(NetworkNumber,addr.NetworkNumber,4)==0) {
			return(true);
		} else {
			return(false);
		}
	}
}


/***************************************************************************
 * IPXAddressClass::operator!= -- overloaded comparison operator           *
 *                                                                         *
 * Since, if NETX isn't running, the network number on a received packet	*
 * can be bogus (all 0's), only the node address is used for comparison 	*
 * purposes here.																				*
 *                                                                         *
 * INPUT:                                                                  *
 *		addr		address to compare to													*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		0 = equal, 1 = not equal															*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
int IPXAddressClass::operator != (IPXAddressClass & addr)
{
	/*------------------------------------------------------------------------
	If either Network Number is all 0's (which can happen if the system is
	not running NETX), compare only the Node Addresses.
	------------------------------------------------------------------------*/
	if ( (NetworkNumber[0]==0 &&
			NetworkNumber[1]==0 &&
			NetworkNumber[2]==0 &&
			NetworkNumber[3]==0) ||
		  (addr.NetworkNumber[0]==0 &&
			addr.NetworkNumber[1]==0 &&
			addr.NetworkNumber[2]==0 &&
			addr.NetworkNumber[3]==0) ) {

		if (memcmp(NodeAddress,addr.NodeAddress,6)==0) {
			return(false);
		} else {
			return(true);
		}
	} else {

		/*------------------------------------------------------------------------
		Otherwise, compare both the Network Numbers and Node Addresses
		------------------------------------------------------------------------*/
		if (memcmp(NodeAddress,addr.NodeAddress,6)==0 && memcmp(NetworkNumber,addr.NetworkNumber,4)==0) {
			return(false);
		} else {
			return(true);
		}
	}
}


/***************************************************************************
 * IPXAddressClass::operator > -- overloaded comparison operator           *
 *                                                                         *
 * INPUT:                                                                  *
 *		addr		address to compare to													*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		TRUE = greater, FALSE = not														*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
int IPXAddressClass::operator > (IPXAddressClass & addr)
{
	return(memcmp(this, &addr, 10) > 0);

}	/* end of operator != */


/***************************************************************************
 * IPXAddressClass::operator < -- overloaded comparison operator           *
 *                                                                         *
 * INPUT:                                                                  *
 *		addr		address to compare to													*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		TRUE = less, FALSE = not															*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
int IPXAddressClass::operator < (IPXAddressClass & addr)
{
	return(memcmp(this, &addr, 10) < 0);

}	/* end of operator != */


/***************************************************************************
 * IPXAddressClass::operator >= -- overloaded comparison operator          *
 *                                                                         *
 * INPUT:                                                                  *
 *		addr		address to compare to													*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		TRUE = greater or equal, FALSE = not											*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
int IPXAddressClass::operator >= (IPXAddressClass & addr)
{
	return(memcmp(this, &addr, 10) >= 0);

}	/* end of operator != */


/***************************************************************************
 * IPXAddressClass::operator <= -- overloaded comparison operator          *
 *                                                                         *
 * INPUT:                                                                  *
 *		addr		address to compare to													*
 *                                                                         *
 * OUTPUT:                                                                 *
 *		TRUE = less or equal, FALSE = not												*
 *                                                                         *
 * WARNINGS:                                                               *
 *		none.																						*
 *                                                                         *
 * HISTORY:                                                                *
 *   12/19/1994 BR : Created.                                              *
 *=========================================================================*/
int IPXAddressClass::operator <= (IPXAddressClass & addr)
{
	return(memcmp(this, &addr, 10) <= 0);

}	/* end of operator != */