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Initial commit of Command & Conquer source code.
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LFeenanEA
422
CCDDE.CPP
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422
CCDDE.CPP
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/*
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** Command & Conquer(tm)
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** Copyright 2025 Electronic Arts Inc.
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**
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** This program is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/***********************************************************************************************
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*** 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 ***
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***********************************************************************************************
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* *
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* Project Name : Command & Conquer - Red Alert *
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* *
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* File Name : CCDDE.CPP *
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* *
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* Programmer : Steve Tall *
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* *
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* Start Date : 10/04/95 *
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* *
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* Last Update : August 5th, 1996 [ST] *
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* *
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*---------------------------------------------------------------------------------------------*
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* Overview: *
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* C&C's interface to the DDE class *
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* *
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*---------------------------------------------------------------------------------------------*
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* *
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* Functions: *
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* DDE_Callback -- DDE server callback function *
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* DDEServerClass::DDEServerClass -- class constructor *
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* DDEServerClass::Enable -- Enables the DDE callback *
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* DDEServerClass::Disable -- Disables the DDE callback *
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* DDEServerClass::~DDEServerClass -- class destructor *
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* DDESC::Callback -- callback function. Called from the DDE_Callback wrapper function *
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* DDESC::Get_MPlayer_Game_Info -- returns a pointer to the multiplayer setup info from wchat *
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* DDESC::Delete_MPlayer_Game_Info -- clears out multi player game setup info *
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* DDESC::Time_Since_Heartbeat -- returns the time in ticks since the last heartbeat from wchat*
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* *
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* Send_Data_To_DDE_Server -- sends a packet to WChat *
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* *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#define WIN32
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#include <WINDOWS.H>
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#include "ccdde.h"
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#include <stdio.h>
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#include <timer.h>
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DDEServerClass DDEServer; //Instance of the DDE Server class
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Instance_Class *DDE_Class = NULL; // pointer for client callback
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// this *must* be called DDE_Class
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BOOL CC95AlreadyRunning = FALSE; //Was there an instance of C&C 95 already running when we started?
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extern HWND MainWindow;
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extern TimerClass GameTimer;
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extern BOOL GameTimerInUse;
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extern void CCDebugString (char *string);
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/***********************************************************************************************
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* DDE_Callback -- DDE server callback function *
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* *
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* Just acts as a wrapper for the DDEServerClass callback function *
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* *
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* INPUT: ptr to data from client *
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* length of data *
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* *
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* OUTPUT: Nothing *
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* *
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* WARNINGS: None *
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* *
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* HISTORY: *
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* 6/8/96 3:19PM ST : Created *
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*=============================================================================================*/
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BOOL CALLBACK DDE_Callback (unsigned char *data, long length)
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{
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return (DDEServer.Callback(data, length));
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}
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/***********************************************************************************************
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* DDEServerClass::DDEServerClass -- class constructor *
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* *
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* *
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* *
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* INPUT: Nothing *
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* *
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* OUTPUT: Nothing *
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* *
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* WARNINGS: None *
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* *
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* HISTORY: *
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* 6/8/96 3:20PM ST : Created *
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*=============================================================================================*/
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DDEServerClass::DDEServerClass(void)
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{
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MPlayerGameInfo = NULL; //Flag that we havnt received a start game info packet yet
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DDE_Class = new Instance_Class ("CONQUER", "WCHAT");
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DDE_Class->Enable_Callback( TRUE );
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IsEnabled = TRUE;
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if (DDE_Class->Test_Server_Running(DDE_Class->local_name)){
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CC95AlreadyRunning = TRUE;
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}else{
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DDE_Class->Register_Server( DDE_Callback );
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}
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}
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void DDEServerClass::Enable(void)
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{
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if (!IsEnabled){
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DDE_Class->Enable_Callback( TRUE );
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IsEnabled = TRUE;
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}
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}
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/***********************************************************************************************
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* DDEServerClass::Disable -- Disables the DDE callback *
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* *
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* *
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* *
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* INPUT: Nothing *
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* *
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* OUTPUT: Nothing *
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* *
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* WARNINGS: None *
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* *
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* HISTORY: *
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* 8/5/96 9:44PM ST : Created *
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*=============================================================================================*/
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void DDEServerClass::Disable(void)
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{
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if (IsEnabled){
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DDE_Class->Enable_Callback( FALSE );
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IsEnabled = FALSE;
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}
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}
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/***********************************************************************************************
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* DDEServerClass::~DDEServerClass -- class destructor *
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* *
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* *
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* *
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* INPUT: Nothing *
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* *
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* OUTPUT: Nothing *
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* *
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* WARNINGS: None *
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* *
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* HISTORY: *
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* 6/8/96 3:20PM ST : Created *
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*=============================================================================================*/
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DDEServerClass::~DDEServerClass(void)
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{
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Delete_MPlayer_Game_Info();
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delete( DDE_Class );
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}
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/***********************************************************************************************
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* DDESC::Callback -- callback function. Called from the DDE_Callback wrapper function *
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* *
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* *
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* *
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* INPUT: data from DDE client *
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* length of data *
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* *
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* OUTPUT: Nothing *
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* *
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* WARNINGS: Data has length and type as first 2 ints *
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* *
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* HISTORY: *
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* 6/8/96 3:21PM ST : Created *
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*=============================================================================================*/
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BOOL DDEServerClass::Callback(unsigned char *data, long length)
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{
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/*
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** If the packet length < 0 then this is a special advisory packet
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*/
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if ( length<0 ) {
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switch( length ) {
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case DDE_ADVISE_CONNECT:
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CCDebugString("C&C95 - DDE advisory: client connect detected.");
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return TRUE;
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case DDE_ADVISE_DISCONNECT:
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CCDebugString("C&C95 - DDE advisory: client disconnect detected.");
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return TRUE;
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default:
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CCDebugString("C&C95 - DDE advisory: Unknown DDE advise type.");
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return FALSE;
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}
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}else{
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/*
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** Packet must be at least the length of the packet type & size fields to be valid
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*/
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if (length < 2*sizeof(int)) {
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CCDebugString ("C&C95 - Received invalid packet.");
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return (FALSE);
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}
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/*
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** Find out what kind of packet this is and its length.
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*/
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int *packet_pointer = (int *)data;
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int actual_length = ntohl(*packet_pointer++);
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int packet_type = ntohl(*packet_pointer++);
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/*
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** Strip the ID int from the start of the packet
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*/
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data += 2*sizeof (int);
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length -= 2*sizeof (int);
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actual_length -= 2*sizeof (int);
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/*
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** Take the appropriate action for the packet type
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*/
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switch ( packet_type ){
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/*
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** This is a packet with the info required for starting a new internet game. This is really
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* just C&CSPAWN.INI sent from WChat instead of read from disk.
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*/
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case DDE_PACKET_START_MPLAYER_GAME:
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CCDebugString("C&C95 - Received start game packet.");
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Delete_MPlayer_Game_Info();
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MPlayerGameInfo = new char [actual_length + 1];
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memcpy (MPlayerGameInfo, data, actual_length);
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*(MPlayerGameInfo + actual_length) = 0; //Terminator in case we treat it as a string
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MPlayerGameInfoLength = actual_length;
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LastHeartbeat = 0;
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break;
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case DDE_TICKLE:
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CCDebugString("C&C95 - Received 'tickle' packet.");
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//SetForegroundWindow ( MainWindow );
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//ShowWindow ( MainWindow, SW_SHOWMAXIMIZED );
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break;
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case DDE_PACKET_HEART_BEAT:
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CCDebugString("C&C95 - Received heart beat packet.");
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if (GameTimerInUse){
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LastHeartbeat = GameTimer.Time();
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}else{
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LastHeartbeat = 0;
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}
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break;
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default:
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CCDebugString("C&C95 - Received unrecognised packet.");
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break;
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}
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}
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return (TRUE);
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}
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/***********************************************************************************************
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* DDESC::Get_MPlayer_Game_Info -- returns a pointer to the multiplayer setup info from wchat *
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* *
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* *
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* *
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* INPUT: Nothing *
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* *
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* OUTPUT: ptr to data in .INI file format *
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* *
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* WARNINGS: None *
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* *
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* HISTORY: *
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* 6/8/96 3:23PM ST : Created *
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*=============================================================================================*/
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char *DDEServerClass::Get_MPlayer_Game_Info (void)
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{
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return (MPlayerGameInfo);
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}
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/***********************************************************************************************
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* DDESC::Delete_MPlayer_Game_Info -- clears out multi player game setup info *
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* *
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* *
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* *
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* INPUT: Nothing *
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* *
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* OUTPUT: Nothing *
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* *
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* WARNINGS: None *
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* *
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* HISTORY: *
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* 6/8/96 3:24PM ST : Created *
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*=============================================================================================*/
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void DDEServerClass::Delete_MPlayer_Game_Info(void)
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{
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if (MPlayerGameInfo){
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delete [] MPlayerGameInfo;
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MPlayerGameInfo = NULL;
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}
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}
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/***********************************************************************************************
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* DDESC::Time_Since_Heartbeat -- returns the time in ticks since the last heartbeat from wchat*
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* *
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* *
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* *
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* INPUT: Nothing *
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* *
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* OUTPUT: time since heartbeat *
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* *
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* WARNINGS: None *
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* *
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* HISTORY: *
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* 6/9/96 11:05PM ST : Created *
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*=============================================================================================*/
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int DDEServerClass::Time_Since_Heartbeat(void)
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{
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return (GameTimer.Time() - LastHeartbeat);
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}
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/***********************************************************************************************
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* Send_Data_To_DDE_Server -- sends a packet to WChat *
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* *
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* *
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* *
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* INPUT: ptr to the data to send *
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* length of data *
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* packet type identifier *
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* *
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* OUTPUT: true if packet successfully sent *
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* *
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* WARNINGS: None *
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* *
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* HISTORY: *
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* 6/9/96 11:07PM ST : Created *
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*=============================================================================================*/
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BOOL Send_Data_To_DDE_Server (char *data, int length, int packet_type)
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{
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#if (0)
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BOOL app_exists;
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app_exists = DDE_Class->Test_Server_Running(DDE_Class->remote_name);
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if (app_exists != TRUE) {
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CCDebugString("Connection to server failed!");
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return(FALSE);
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}
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#endif //(0)
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if( DDE_Class->Open_Poke_Connection(DDE_Class->remote_name) == FALSE) {
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CCDebugString("C&C95 - Failed to connect for POKE!");
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return (FALSE);
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}
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char *poke_data = new char [length + 2*sizeof(int)];
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int *poke_data_int = (int*)poke_data;
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*poke_data_int = htonl (length + 2*sizeof(int));
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*(poke_data_int+1)= htonl (packet_type);
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memcpy (poke_data + 8, data, length);
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if(DDE_Class->Poke_Server( (LPBYTE) poke_data, ntohl(*poke_data_int) ) == FALSE) {
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CCDebugString("C&C95 - POKE failed!\n");
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DDE_Class->Close_Poke_Connection(); // close down the link
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delete poke_data;
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return (FALSE);
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}
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DDE_Class->Close_Poke_Connection(); // close down the link
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delete poke_data;
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return (TRUE);
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}
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