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/* Emacs style mode select -*- C++ -*-
*-----------------------------------------------------------------------------
*
*
* PrBoom: a Doom port merged with LxDoom and LSDLDoom
* based on BOOM, a modified and improved DOOM engine
* Copyright (C) 1999 by
* id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
* Copyright (C) 1999-2000 by
* Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
* Copyright 2005, 2006 by
* Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* DESCRIPTION:
* Doom Network protocol packet definitions.
*-----------------------------------------------------------------------------*/
#include "doomtype.h"
#include "d_ticcmd.h"
#include "m_swap.h"
enum packet_type_e {
PKT_INIT, // initial packet to server
PKT_SETUP, // game information packet
PKT_GO, // game has started
PKT_TICC, // tics from client
PKT_TICS, // tics from server
PKT_RETRANS, // Request for retransmission
PKT_EXTRA, // Extra info packet
PKT_QUIT, // Player quit game
PKT_DOWN, // Server downed
PKT_WAD, // Wad file request
PKT_BACKOFF, // Request for client back-off
};
typedef struct {
byte checksum; // Simple checksum of the entire packet
byte type; /* Type of packet */
byte reserved[2]; /* Was random in prboom <=2.2.4, now 0 */
unsigned tic; // Timestamp
} PACKEDATTR packet_header_t;
static inline void packet_set(packet_header_t* p, enum packet_type_e t, unsigned long tic)
{ p->tic = doom_htonl(tic); p->type = t; p->reserved[0] = 0; p->reserved[1] = 0; }
#ifndef GAME_OPTIONS_SIZE
// From g_game.h
#define GAME_OPTIONS_SIZE 64
#endif
struct setup_packet_s {
byte players, yourplayer, skill, episode, level, deathmatch, complevel, ticdup, extratic;
byte game_options[GAME_OPTIONS_SIZE];
byte numwads;
byte wadnames[1]; // Actually longer
};
/* cph - convert network byte stream to usable ticcmd_t and visa-versa
* - the functions are functionally identical apart from parameters
* - the void* param can be unaligned. By using void* as the parameter
* it means gcc won't assume alignment so won't make false assumptions
* when optimising. So I'm told.
*/
inline static void RawToTic(ticcmd_t* dst, const void* src)
{
memcpy(dst,src,sizeof *dst);
dst->angleturn = doom_ntohs(dst->angleturn);
dst->consistancy = doom_ntohs(dst->consistancy);
}
inline static void TicToRaw(void* dst, const ticcmd_t* src)
{
/* We have to make a copy of the source struct, then do byte swaps,
* and fnially copy to the destination (can't do the swaps in the
* destination, because it might not be aligned).
*/
ticcmd_t tmp = *src;
tmp.angleturn = doom_ntohs(tmp.angleturn);
tmp.consistancy = doom_ntohs(tmp.consistancy);
memcpy(dst,&tmp,sizeof tmp);
}
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