diff options
Diffstat (limited to 'demos/3rdparty/doom/d_net.c')
| -rw-r--r-- | demos/3rdparty/doom/d_net.c | 759 |
1 files changed, 0 insertions, 759 deletions
diff --git a/demos/3rdparty/doom/d_net.c b/demos/3rdparty/doom/d_net.c deleted file mode 100644 index dc577839..00000000 --- a/demos/3rdparty/doom/d_net.c +++ /dev/null @@ -1,759 +0,0 @@ -// Emacs style mode select -*- C++ -*- -//----------------------------------------------------------------------------- -// -// $Id:$ -// -// Copyright (C) 1993-1996 by id Software, Inc. -// -// This source is available for distribution and/or modification -// only under the terms of the DOOM Source Code License as -// published by id Software. All rights reserved. -// -// The source is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License -// for more details. -// -// $Log:$ -// -// DESCRIPTION: -// DOOM Network game communication and protocol, -// all OS independend parts. -// -//----------------------------------------------------------------------------- - - -static const char rcsid[] = "$Id: d_net.c,v 1.3 1997/02/03 22:01:47 b1 Exp $"; - - -#include "m_menu.h" -#include "i_system.h" -#include "i_video.h" -#include "i_net.h" -#include "g_game.h" -#include "doomdef.h" -#include "doomstat.h" - -#define NCMD_EXIT 0x80000000 -#define NCMD_RETRANSMIT 0x40000000 -#define NCMD_SETUP 0x20000000 -#define NCMD_KILL 0x10000000 // kill game -#define NCMD_CHECKSUM 0x0fffffff - - -doomcom_t* doomcom; -doomdata_t* netbuffer; // points inside doomcom - - -// -// NETWORKING -// -// gametic is the tic about to (or currently being) run -// maketic is the tick that hasn't had control made for it yet -// nettics[] has the maketics for all players -// -// a gametic cannot be run until nettics[] > gametic for all players -// -#define RESENDCOUNT 10 -#define PL_DRONE 0x80 // bit flag in doomdata->player - -ticcmd_t localcmds[BACKUPTICS]; - -ticcmd_t netcmds[MAXPLAYERS][BACKUPTICS]; -int nettics[MAXNETNODES]; -boolean nodeingame[MAXNETNODES]; // set false as nodes leave game -boolean remoteresend[MAXNETNODES]; // set when local needs tics -int resendto[MAXNETNODES]; // set when remote needs tics -int resendcount[MAXNETNODES]; - -int nodeforplayer[MAXPLAYERS]; - -int maketic; -int lastnettic; -int skiptics; -int ticdup; -int maxsend; // BACKUPTICS/(2*ticdup)-1 - - -void D_ProcessEvents (void); -void G_BuildTiccmd (ticcmd_t *cmd); -void D_DoAdvanceDemo (void); - -boolean reboundpacket; -doomdata_t reboundstore; - - - -// -// -// -int NetbufferSize (void) -{ - return (int)&(((doomdata_t *)0)->cmds[netbuffer->numtics]); -} - -// -// Checksum -// -unsigned NetbufferChecksum (void) -{ - unsigned c; - int i,l; - - c = 0x1234567; - - // FIXME -endianess? -#ifdef NORMALUNIX - return 0; // byte order problems -#endif - - l = (NetbufferSize () - (int)&(((doomdata_t *)0)->retransmitfrom))/4; - for (i=0 ; i<l ; i++) - c += ((unsigned *)&netbuffer->retransmitfrom)[i] * (i+1); - - return c & NCMD_CHECKSUM; -} - -// -// -// -int ExpandTics (int low) -{ - int delta; - - delta = low - (maketic&0xff); - - if (delta >= -64 && delta <= 64) - return (maketic&~0xff) + low; - if (delta > 64) - return (maketic&~0xff) - 256 + low; - if (delta < -64) - return (maketic&~0xff) + 256 + low; - - I_Error ("ExpandTics: strange value %i at maketic %i",low,maketic); - return 0; -} - - - -// -// HSendPacket -// -void -HSendPacket - (int node, - int flags ) -{ - netbuffer->checksum = NetbufferChecksum () | flags; - - if (!node) - { - reboundstore = *netbuffer; - reboundpacket = true; - return; - } - - if (demoplayback) - return; - - if (!netgame) - I_Error ("Tried to transmit to another node"); - - doomcom->command = CMD_SEND; - doomcom->remotenode = node; - doomcom->datalength = NetbufferSize (); - -#if 0 // AJH HACK - if (debugfile) - { - int i; - int realretrans; - if (netbuffer->checksum & NCMD_RETRANSMIT) - realretrans = ExpandTics (netbuffer->retransmitfrom); - else - realretrans = -1; - - I_DBGprintf("send (%i + %i, R %i) [%i] ", - ExpandTics(netbuffer->starttic), - netbuffer->numtics, realretrans, doomcom->datalength); - - for (i=0 ; i<doomcom->datalength ; i++) - I_DBGprintf("%i ",((byte *)netbuffer)[i]); - - I_DBGprintf("\n"); - } -#endif - - I_NetCmd (); -} - -// -// HGetPacket -// Returns false if no packet is waiting -// -boolean HGetPacket (void) -{ - if (reboundpacket) - { - *netbuffer = reboundstore; - doomcom->remotenode = 0; - reboundpacket = false; - return true; - } - - if (!netgame) - return false; - - if (demoplayback) - return false; - - doomcom->command = CMD_GET; - I_NetCmd (); - - if (doomcom->remotenode == -1) - return false; - - if (doomcom->datalength != NetbufferSize ()) - { - I_DBGprintf("bad packet length %i\n",doomcom->datalength); - return false; - } - - if (NetbufferChecksum () != (netbuffer->checksum&NCMD_CHECKSUM) ) - { - I_DBGprintf("bad packet checksum\n"); - return false; - } - -#if 0 // AJH uGFX Hack - if (debugfile) - { - int realretrans; - int i; - - if (netbuffer->checksum & NCMD_SETUP) - I_DBGprintf("setup packet\n"); - else - { - if (netbuffer->checksum & NCMD_RETRANSMIT) - realretrans = ExpandTics (netbuffer->retransmitfrom); - else - realretrans = -1; - - I_DBGprintf("get %i = (%i + %i, R %i)[%i] ", - doomcom->remotenode, - ExpandTics(netbuffer->starttic), - netbuffer->numtics, realretrans, doomcom->datalength); - - for (i=0 ; i<doomcom->datalength ; i++) - I_DBGprintf("%i ",((byte *)netbuffer)[i]); - I_DBGprintf("\n"); - } - } -#endif - return true; -} - - -// -// GetPackets -// -char exitmsg[80]; - -void GetPackets (void) -{ - int netconsole; - int netnode; - ticcmd_t *src, *dest; - int realend; - int realstart; - - while ( HGetPacket() ) - { - if (netbuffer->checksum & NCMD_SETUP) - continue; // extra setup packet - - netconsole = netbuffer->player & ~PL_DRONE; - netnode = doomcom->remotenode; - - // to save bytes, only the low byte of tic numbers are sent - // Figure out what the rest of the bytes are - realstart = ExpandTics (netbuffer->starttic); - realend = (realstart+netbuffer->numtics); - - // check for exiting the game - if (netbuffer->checksum & NCMD_EXIT) - { - if (!nodeingame[netnode]) - continue; - nodeingame[netnode] = false; - playeringame[netconsole] = false; - strcpy (exitmsg, "Player 1 left the game"); - exitmsg[7] += netconsole; - players[consoleplayer].message = exitmsg; - if (demorecording) - G_CheckDemoStatus (); - continue; - } - - // check for a remote game kill - if (netbuffer->checksum & NCMD_KILL) - I_Error ("Killed by network driver"); - - nodeforplayer[netconsole] = netnode; - - // check for retransmit request - if ( resendcount[netnode] <= 0 - && (netbuffer->checksum & NCMD_RETRANSMIT) ) - { - resendto[netnode] = ExpandTics(netbuffer->retransmitfrom); - I_DBGprintf ("retransmit from %i\n", resendto[netnode]); - resendcount[netnode] = RESENDCOUNT; - } - else - resendcount[netnode]--; - - // check for out of order / duplicated packet - if (realend == nettics[netnode]) - continue; - - if (realend < nettics[netnode]) - { - I_DBGprintf ("out of order packet (%i + %i)\n" , - realstart,netbuffer->numtics); - continue; - } - - // check for a missed packet - if (realstart > nettics[netnode]) - { - // stop processing until the other system resends the missed tics - I_DBGprintf("missed tics from %i (%i - %i)\n", - netnode, realstart, nettics[netnode]); - remoteresend[netnode] = true; - continue; - } - - // update command store from the packet - { - int start; - - remoteresend[netnode] = false; - - start = nettics[netnode] - realstart; - src = &netbuffer->cmds[start]; - - while (nettics[netnode] < realend) - { - dest = &netcmds[netconsole][nettics[netnode]%BACKUPTICS]; - nettics[netnode]++; - *dest = *src; - src++; - } - } - } -} - - -// -// NetUpdate -// Builds ticcmds for console player, -// sends out a packet -// -int gametime; - -void NetUpdate (void) -{ - int nowtime; - int newtics; - int i,j; - int realstart; - int gameticdiv; - - // check time - nowtime = I_GetTime ()/ticdup; - newtics = nowtime - gametime; - gametime = nowtime; - - if (newtics <= 0) // nothing new to update - goto listen; - - if (skiptics <= newtics) - { - newtics -= skiptics; - skiptics = 0; - } - else - { - skiptics -= newtics; - newtics = 0; - } - - - netbuffer->player = consoleplayer; - - // build new ticcmds for console player - gameticdiv = gametic/ticdup; - for (i=0 ; i<newtics ; i++) - { - I_StartTic (); - D_ProcessEvents (); - if (maketic - gameticdiv >= BACKUPTICS/2-1) - break; // can't hold any more - - //I_printf("mk:%i ",maketic); - G_BuildTiccmd (&localcmds[maketic%BACKUPTICS]); - maketic++; - } - - - if (singletics) - return; // singletic update is syncronous - - // send the packet to the other nodes - for (i=0 ; i<doomcom->numnodes ; i++) - if (nodeingame[i]) - { - netbuffer->starttic = realstart = resendto[i]; - netbuffer->numtics = maketic - realstart; - if (netbuffer->numtics > BACKUPTICS) - I_Error ("NetUpdate: netbuffer->numtics > BACKUPTICS"); - - resendto[i] = maketic - doomcom->extratics; - - for (j=0 ; j< netbuffer->numtics ; j++) - netbuffer->cmds[j] = - localcmds[(realstart+j)%BACKUPTICS]; - - if (remoteresend[i]) - { - netbuffer->retransmitfrom = nettics[i]; - HSendPacket (i, NCMD_RETRANSMIT); - } - else - { - netbuffer->retransmitfrom = 0; - HSendPacket (i, 0); - } - } - - // listen for other packets - listen: - GetPackets (); -} - - - -// -// CheckAbort -// -void CheckAbort (void) -{ - event_t *ev; - int stoptic; - - stoptic = I_GetTime () + 2; - while (I_GetTime() < stoptic) - I_StartTic (); - - I_StartTic (); - for ( ; eventtail != eventhead - ; eventtail = (++eventtail)&(MAXEVENTS-1) ) - { - ev = &events[eventtail]; - if (ev->type == ev_keydown && ev->data1 == KEY_ESCAPE) - I_Error ("Network game synchronization aborted."); - } -} - - -// -// D_ArbitrateNetStart -// -void D_ArbitrateNetStart (void) -{ - int i; - boolean gotinfo[MAXNETNODES]; - - autostart = true; - memset (gotinfo,0,sizeof(gotinfo)); - - if (doomcom->consoleplayer) - { - // listen for setup info from key player - I_printf ("listening for network start info...\n"); - while (1) - { - CheckAbort (); - if (!HGetPacket ()) - continue; - if (netbuffer->checksum & NCMD_SETUP) - { - if (netbuffer->player != VERSION) - I_Error ("Different DOOM versions cannot play a net game!"); - startskill = netbuffer->retransmitfrom & 15; - deathmatch = (netbuffer->retransmitfrom & 0xc0) >> 6; - nomonsters = (netbuffer->retransmitfrom & 0x20) > 0; - respawnparm = (netbuffer->retransmitfrom & 0x10) > 0; - startmap = netbuffer->starttic & 0x3f; - startepisode = netbuffer->starttic >> 6; - return; - } - } - } - else - { - // key player, send the setup info - I_printf ("sending network start info...\n"); - do - { - CheckAbort (); - for (i=0 ; i<doomcom->numnodes ; i++) - { - netbuffer->retransmitfrom = startskill; - if (deathmatch) - netbuffer->retransmitfrom |= (deathmatch<<6); - if (nomonsters) - netbuffer->retransmitfrom |= 0x20; - if (respawnparm) - netbuffer->retransmitfrom |= 0x10; - netbuffer->starttic = startepisode * 64 + startmap; - netbuffer->player = VERSION; - netbuffer->numtics = 0; - HSendPacket (i, NCMD_SETUP); - } - -#if 1 - for(i = 10 ; i && HGetPacket(); --i) - { - if((netbuffer->player&0x7f) < MAXNETNODES) - gotinfo[netbuffer->player&0x7f] = true; - } -#else - while (HGetPacket ()) - { - gotinfo[netbuffer->player&0x7f] = true; - } -#endif - - for (i=1 ; i<doomcom->numnodes ; i++) - if (!gotinfo[i]) - break; - } while (i < doomcom->numnodes); - } -} - -// -// D_CheckNetGame -// Works out player numbers among the net participants -// -extern int viewangleoffset; - -void D_CheckNetGame (void) -{ - int i; - - for (i=0 ; i<MAXNETNODES ; i++) - { - nodeingame[i] = false; - nettics[i] = 0; - remoteresend[i] = false; // set when local needs tics - resendto[i] = 0; // which tic to start sending - } - - // I_InitNetwork sets doomcom and netgame - I_InitNetwork (); - if (doomcom->id != DOOMCOM_ID) - I_Error ("Doomcom buffer invalid!"); - - netbuffer = &doomcom->data; - consoleplayer = displayplayer = doomcom->consoleplayer; - if (netgame) - D_ArbitrateNetStart (); - - I_printf ("startskill %i deathmatch: %i startmap: %i startepisode: %i\n", - startskill, deathmatch, startmap, startepisode); - - // read values out of doomcom - ticdup = doomcom->ticdup; - maxsend = BACKUPTICS/(2*ticdup)-1; - if (maxsend<1) - maxsend = 1; - - for (i=0 ; i<doomcom->numplayers ; i++) - playeringame[i] = true; - for (i=0 ; i<doomcom->numnodes ; i++) - nodeingame[i] = true; - - I_printf ("player %i of %i (%i nodes)\n", - consoleplayer+1, doomcom->numplayers, doomcom->numnodes); - -} - - -// -// D_QuitNetGame -// Called before quitting to leave a net game -// without hanging the other players -// -void D_QuitNetGame (void) -{ - int i, j; - - if (!netgame || !usergame || consoleplayer == -1 || demoplayback) - return; - - // send a bunch of packets for security - netbuffer->player = consoleplayer; - netbuffer->numtics = 0; - for (i=0 ; i<4 ; i++) - { - for (j=1 ; j<doomcom->numnodes ; j++) - if (nodeingame[j]) - HSendPacket (j, NCMD_EXIT); - I_WaitVBL (1); - } -} - - - -// -// TryRunTics -// -int frametics[4]; -int frameon; -int frameskip[4]; -int oldnettics; - -extern boolean advancedemo; - -void TryRunTics (void) -{ - int i; - int lowtic; - int entertic; - static int oldentertics; - int realtics; - int availabletics; - int counts; - int numplaying; - - // get real tics - entertic = I_GetTime ()/ticdup; - realtics = entertic - oldentertics; - oldentertics = entertic; - - // get available tics - NetUpdate (); - - lowtic = MAXINT; - numplaying = 0; - for (i=0 ; i<doomcom->numnodes ; i++) - { - if (nodeingame[i]) - { - numplaying++; - if (nettics[i] < lowtic) - lowtic = nettics[i]; - } - } - availabletics = lowtic - gametic/ticdup; - - // decide how many tics to run - if (realtics < availabletics-1) - counts = realtics+1; - else if (realtics < availabletics) - counts = realtics; - else - counts = availabletics; - - if (counts < 1) - counts = 1; - - frameon++; - - I_DBGprintf("=======real: %i avail: %i game: %i\n", - realtics, availabletics,counts); - - if (!demoplayback) - { - // ideally nettics[0] should be 1 - 3 tics above lowtic - // if we are consistantly slower, speed up time - for (i=0 ; i<MAXPLAYERS ; i++) - if (playeringame[i]) - break; - if (consoleplayer == i) - { - // the key player does not adapt - } - else - { - if (nettics[0] <= nettics[nodeforplayer[i]]) - { - gametime--; - // I_printf ("-"); - } - frameskip[frameon&3] = (oldnettics > nettics[nodeforplayer[i]]); - oldnettics = nettics[0]; - if (frameskip[0] && frameskip[1] && frameskip[2] && frameskip[3]) - { - skiptics = 1; - // I_printf ("+"); - } - } - }// demoplayback - - // wait for new tics if needed - while (lowtic < gametic/ticdup + counts) - { - NetUpdate (); - lowtic = MAXINT; - - for (i=0 ; i<doomcom->numnodes ; i++) - if (nodeingame[i] && nettics[i] < lowtic) - lowtic = nettics[i]; - - if (lowtic < gametic/ticdup) - I_Error ("TryRunTics: lowtic < gametic"); - - // don't stay in here forever -- give the menu a chance to work - if (I_GetTime ()/ticdup - entertic >= 20) - { - M_Ticker (); - return; - } - } - - // run the count * ticdup dics - while (counts--) - { - for (i=0 ; i<ticdup ; i++) - { - if (gametic/ticdup > lowtic) - I_Error ("gametic>lowtic"); - if (advancedemo) - D_DoAdvanceDemo (); - M_Ticker (); - G_Ticker (); - gametic++; - - // modify command for duplicated tics - if (i != ticdup-1) - { - ticcmd_t *cmd; - int buf; - int j; - - buf = (gametic/ticdup)%BACKUPTICS; - for (j=0 ; j<MAXPLAYERS ; j++) - { - cmd = &netcmds[j][buf]; - cmd->chatchar = 0; - if (cmd->buttons & BT_SPECIAL) - cmd->buttons = 0; - } - } - } - NetUpdate (); // check for new console commands - } -} |