CnC_Remastered_Collection/TIBERIANDAWN/NOSEQCON.H

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//
// Copyright 2020 Electronic Arts Inc.
//
// TiberianDawn.DLL and RedAlert.dll and corresponding source code 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.
// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed
// in the hope that it will be useful, but with permitted additional restrictions
// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT
// distributed with this program. You should have received a copy of the
// GNU General Public License along with permitted additional restrictions
// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection
/* $Header: F:\projects\c&c\vcs\code\noseqcon.h_v 1.12 16 Oct 1995 16:46:22 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 : NOSEQCON.H *
* *
* Programmer : Bill Randolph *
* *
* Start Date : December 19, 1994 *
* *
* Last Update : April 9, 1995 [BR] *
* *
*-------------------------------------------------------------------------*
* *
* This class provides a "Non-Sequenced" ACK/Retry approach to packet *
* transmission. It sends out as many packets as are in the queue, whose *
* resend delta times have expired; and it ACK's any packets its received *
* who haven't been ACK'd yet. Thus, order of delivery is NOT guaranteed; *
* however, the performance is better than the Sequenced approach. *
* *
* A derived class must provide: *
* - Init: Initialization of any hardware-specific values. *
* - Send: a hardware-dependent send routine. *
* *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#ifndef NONSEQCONN_H
#define NONSEQCONN_H
/*
********************************* Includes **********************************
*/
#include "connect.h"
#include "combuf.h"
/*
***************************** Class Declaration *****************************
*/
class NonSequencedConnClass : public ConnectionClass
{
/*
---------------------------- Public Interface ----------------------------
*/
public:
/*.....................................................................
Constructor/destructor.
.....................................................................*/
NonSequencedConnClass (int numsend, int numrecieve, int maxlen,
unsigned short magicnum, unsigned long retry_delta,
unsigned long max_retries, unsigned long timeout);
virtual ~NonSequencedConnClass ();
/*.....................................................................
Initialization.
.....................................................................*/
virtual void Init (void);
/*.....................................................................
Send/Receive routines.
.....................................................................*/
virtual int Send_Packet (void * buf, int buflen, int ack_req);
virtual int Receive_Packet (void * buf, int buflen);
virtual int Get_Packet (void * buf, int *buflen);
/*.....................................................................
The packet "queue"; this non-sequenced version isn't really much of
a queue, but more of a repository.
.....................................................................*/
CommBufferClass *Queue;
/*
-------------------------- Protected Interface ---------------------------
*/
protected:
/*.....................................................................
Routines to service the Send & Receive queues.
.....................................................................*/
virtual int Service_Send_Queue (void);
virtual int Service_Receive_Queue (void);
/*.....................................................................
Running totals of # of packets we send & receive which require an ACK,
and those that don't.
.....................................................................*/
unsigned long NumRecNoAck;
unsigned long NumRecAck;
unsigned long NumSendNoAck;
unsigned long NumSendAck;
/*.....................................................................
This is the ID of the last consecutively-received packet; anything older
than this, we know is a resend. Anything newer than this MUST be lying
around in the Queue for us to detect it as a resend.
.....................................................................*/
unsigned long LastSeqID;
/*.....................................................................
This is the ID of the PACKET_DATA_ACK packet we read last; it ensures
that the application reads that type of packet in order.
.....................................................................*/
unsigned long LastReadID;
};
#endif