/* DE1: $Id: net_buf.h 1754 2004-06-16 18:23:20Z skyjake $
 * Copyright (C) 2003, 2004 Jaakko Keränen <jaakko.keranen@iki.fi>
 *
 * 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 2 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: http://www.opensource.org/
 */

/*
 * net_buf.h: Network Message Handling and Buffering
 */

#ifndef __DOOMSDAY_NETWORK_BUFFER_H__
#define __DOOMSDAY_NETWORK_BUFFER_H__

#include "con_decl.h"

// Send Packet flags:
#define SPF_REBOUND		0x00020000 // Write only to local loopback
#define SPF_DONT_SEND	0x00040000 // Don't really send out anything
#define SPF_CONFIRM		0x40000000 // Make sure it's received
#define SPF_ORDERED		0x80000000 // Send in order & confirm

#define NETBUFFER_MAXDATA	32768

// Each network node is identified by a number.
typedef unsigned int nodeid_t;

// Incoming messages are stored in netmessage_s structs.
typedef struct netmessage_s {
	struct netmessage_s *next;
	nodeid_t        sender;
	int             player;		   // Set in N_GetMessage().
	unsigned int    size;
	byte           *data;
	void           *handle;
} netmessage_t;

typedef unsigned short msgid_t;

#pragma pack(1)
typedef struct {
	msgid_t         id;
	byte            type;
	byte            data[NETBUFFER_MAXDATA];
} netdata_t;

#pragma pack()

typedef struct netbuffer_s {
	int             player;		   // Recipient or sender.
	int             length;		   // Number of bytes in the data buffer.
	int             headerLength;  // 1 byte at the moment.

	byte           *cursor;		   // Points into the data buffer.

	netdata_t       msg;		   // The data buffer for sending and
	// receiving packets.
} netbuffer_t;

/*
 * Globally accessible data.
 */
extern netbuffer_t netBuffer;
extern boolean  allowSending;

/*
 * Functions.
 */
void            N_Init(void);
void            N_Shutdown(void);
void            N_ClearMessages(void);
void            N_SendPacket(int flags);
boolean         N_GetPacket(void);
int             N_IdentifyPlayer(nodeid_t id);

void            N_PostMessage(netmessage_t * msg);

D_CMD(HuffmanStats);

#endif