1 files changed, 96 insertions, 0 deletions

diff --git a/src/protocol.h b/src/protocol.h
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+++ b/src/protocol.h
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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);
+}