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Diffstat (limited to 'src/hexen/d_net.c')
| -rw-r--r-- | src/hexen/d_net.c | 985 |
1 files changed, 985 insertions, 0 deletions
diff --git a/src/hexen/d_net.c b/src/hexen/d_net.c new file mode 100644 index 00000000..f199cd38 --- /dev/null +++ b/src/hexen/d_net.c @@ -0,0 +1,985 @@ +// Emacs style mode select -*- C++ -*- +//----------------------------------------------------------------------------- +// +// Copyright(C) 1993-1996 Id Software, Inc. +// Copyright(C) 1993-2008 Raven Software +// Copyright(C) 2008 Simon Howard +// +// 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. +// +//----------------------------------------------------------------------------- + + +#include "h2def.h" +#include "s_sound.h" +#include "doomkeys.h" +#include "i_video.h" +#include "i_system.h" +#include "i_timer.h" +#include "m_argv.h" +#include "p_local.h" +#include <stdlib.h> // for atoi() + +#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, skiptics; +int ticdup; +int maxsend; // BACKUPTICS/(2*ticdup)-1 + +void H2_ProcessEvents(void); +void G_BuildTiccmd(ticcmd_t * cmd); +void H2_DoAdvanceDemo(void); +extern void ST_NetProgress(void); +extern void ST_NetDone(void); + +boolean reboundpacket; +doomdata_t reboundstore; + + +int NetbufferSize(void) +{ + return (int) &(((doomdata_t *) 0)->cmds[netbuffer->numtics]); +} + +unsigned NetbufferChecksum(void) +{ + unsigned c; + int i, l; + + c = 0x1234567; + +#if defined(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 (debugfile) + { + int i; + int realretrans; + if (netbuffer->checksum & NCMD_RETRANSMIT) + realretrans = ExpandTics(netbuffer->retransmitfrom); + else + realretrans = -1; + fprintf(debugfile, "send (%i + %i, R %i) [%i] ", + ExpandTics(netbuffer->starttic), netbuffer->numtics, + realretrans, doomcom->datalength); + for (i = 0; i < doomcom->datalength; i++) + fprintf(debugfile, "%i ", ((byte *) netbuffer)[i]); + fprintf(debugfile, "\n"); + } + +#ifdef I_NET + I_NetCmd(); +#endif +} + +//========================================================================== +// +// NET_SendFrags +// +//========================================================================== + +void NET_SendFrags(player_t * player) +{ + int i; + int frags; + + netbuffer->checksum = NetbufferChecksum(); + + if (demoplayback) + { + return; + } + if (!netgame) + { + I_Error("Tried to transmit to another node"); + } + + frags = 0; + for (i = 0; i < MAXPLAYERS; i++) + { + frags += player->frags[i]; + } + doomcom->command = CMD_FRAG; + doomcom->remotenode = frags; + doomcom->datalength = NetbufferSize(); + +#ifdef I_NET + I_NetCmd(); +#endif +} + +/* +============== += += 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; +#ifdef I_NET + I_NetCmd(); +#endif + if (doomcom->remotenode == -1) + return false; + + if (doomcom->datalength != NetbufferSize()) + { + if (debugfile) + fprintf(debugfile, "bad packet length %i\n", doomcom->datalength); + return false; + } + + if (NetbufferChecksum() != (netbuffer->checksum & NCMD_CHECKSUM)) + { + if (debugfile) + fprintf(debugfile, "bad packet checksum\n"); + return false; + } + + if (debugfile) + { + int realretrans; + int i; + + if (netbuffer->checksum & NCMD_SETUP) + fprintf(debugfile, "setup packet\n"); + else + { + if (netbuffer->checksum & NCMD_RETRANSMIT) + realretrans = ExpandTics(netbuffer->retransmitfrom); + else + realretrans = -1; + fprintf(debugfile, "get %i = (%i + %i, R %i)[%i] ", + doomcom->remotenode, ExpandTics(netbuffer->starttic), + netbuffer->numtics, realretrans, doomcom->datalength); + for (i = 0; i < doomcom->datalength; i++) + fprintf(debugfile, "%i ", ((byte *) netbuffer)[i]); + fprintf(debugfile, "\n"); + } + } + 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; + P_SetMessage(&players[consoleplayer], exitmsg, true); + S_StartSound(NULL, SFX_CHAT); +// 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); + if (debugfile) + fprintf(debugfile, "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]) + { + if (debugfile) + fprintf(debugfile, "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 + if (debugfile) + fprintf(debugfile, "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(); + H2_ProcessEvents(); + if (maketic - gameticdiv >= BACKUPTICS / 2 - 1) + break; // can't hold any more +//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 (;;) + { + ev = D_PopEvent(); + + if (ev == NULL) + { + break; + } + + 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]; + boolean gotClass[MAXNETNODES]; +#ifdef __WATCOMC__ + int nextTic; + extern volatile int ticcount; + + nextTic = ticcount + 8; +#endif + + autostart = true; + + memset(gotClass, 0, sizeof(gotClass)); + memset(gotinfo, 0, sizeof(gotinfo)); + gotClass[doomcom->consoleplayer] = true; + do + { + i = 0; + + CheckAbort(); + while (HGetPacket()) + { // Check for any incoming packets + if (netbuffer->checksum & NCMD_SETUP && netbuffer->starttic >= 64) + { + + PlayerClass[netbuffer->player] = netbuffer->starttic & 0x3f; + if (!gotClass[netbuffer->player]) + { + gotClass[netbuffer->player] = true; + ST_NetProgress(); + ST_Message("\n"); + } + if (netbuffer->retransmitfrom) + { // that node has received info from all other nodes + gotinfo[netbuffer->player] = true; + } + } + } +#ifdef __WATCOMC__ + if (ticcount <= nextTic) + { // only send packets every half second + continue; + } + nextTic = ticcount + 8; +#endif + // Keep sending out packets containing the console class + for (i = 0; i < doomcom->numnodes; i++) + { + netbuffer->player = doomcom->consoleplayer; + netbuffer->starttic = PlayerClass[doomcom->consoleplayer] + 64; + netbuffer->retransmitfrom = gotinfo[doomcom->consoleplayer]; + netbuffer->numtics = 0; + HSendPacket(i, NCMD_SETUP); + } + for (i = 0; i < doomcom->numnodes; i++) + { // Make sure that all nodes have sent class info + if (!gotClass[i]) + { + ST_Message("."); + break; + } + } + if (i < doomcom->numnodes) + { + continue; + } + else + { // consoleplayer has received all player classes + if (gotinfo[doomcom->consoleplayer]) + { + CheckAbort(); + } + else + { + gotinfo[doomcom->consoleplayer] = true; + ST_Message("All player classes received, ready to proceed\n"); + ST_NetDone(); + } + } + for (i = 0; i < doomcom->numnodes; i++) + { // Make sure that all nodes are ready to proceed + if (!gotinfo[i]) + { + break; + } + } + } + while (i < doomcom->numnodes); + + memset(gotinfo, 0, sizeof(gotinfo)); + + if (doomcom->consoleplayer) + { // listen for setup info from key player +// ST_Message ("listening for network start info...\n"); + while (1) + { + CheckAbort(); + if (!HGetPacket()) + continue; + if (netbuffer->checksum & NCMD_SETUP && netbuffer->starttic < 64) + { + if (netbuffer->player != HEXEN_VERSION) + I_Error + ("Different HEXEN 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 = 1; + return; + } + } + } + else + { // key player, send the setup info +// ST_Message ("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 = startmap & 0x3f; + netbuffer->player = HEXEN_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); + } +} + +// Dummy version of I_InitNetwork; netgames are currently broken. + +void I_InitNetwork(void) +{ + // + // single player game + // + doomcom = malloc(sizeof(*doomcom)); + memset(doomcom, 0, sizeof(*doomcom)); + netgame = false; + doomcom->id = DOOMCOM_ID; + doomcom->numplayers = doomcom->numnodes = 1; + doomcom->deathmatch = false; + doomcom->consoleplayer = 0; + doomcom->ticdup = 1; + doomcom->extratics = 0; +} + +/* +=================== += += D_CheckNetGame += += Works out player numbers among the net participants +=================== +*/ + +extern int viewangleoffset; + +void D_CheckNetGame(void) +{ + int i; + int pClass; + + 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; + pClass = PCLASS_FIGHTER; + i = M_CheckParm("-class"); + + if (i > 0) + { + pClass = atoi(myargv[i + 1]); + if (pClass > PCLASS_MAGE || pClass < PCLASS_FIGHTER) + { + I_Error("Invalid player class: %d\n", pClass); + } + ST_Message("\nPlayer Class: %d\n", pClass); + } + PlayerClass[consoleplayer] = pClass; + if (netgame) + D_ArbitrateNetStart(); +//ST_Message ("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; + +//ST_Message ("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 (debugfile) + fclose(debugfile); + + 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], frameon; +int frameskip[4]; +int oldnettics; +extern boolean advancedemo; + +void TryRunTics(void) +{ + int i; + int lowtic; + int entertic; + static int oldentertics; + int realtics, availabletics; + int counts; + int numplaying; + +// +// get real tics +// + entertic = I_GetTime() / ticdup; + realtics = entertic - oldentertics; + oldentertics = entertic; + +// +// get available tics +// + NetUpdate(); + + lowtic = INT_MAX; + 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++; + + if (debugfile) + fprintf(debugfile, "=======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--; + // printf ("-"); + } + frameskip[frameon & 3] = (oldnettics > nettics[nodeforplayer[i]]); + oldnettics = nettics[0]; + if (frameskip[0] && frameskip[1] && frameskip[2] && frameskip[3]) + { + skiptics = 1; + // printf ("+"); + } + } + //============================================================================= + } // demoplayback + + // + // wait for new tics if needed + // + while (lowtic < gametic / ticdup + counts) + { + + NetUpdate(); + lowtic = INT_MAX; + + 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) + { + MN_Ticker(); + return; + } + + // Don't hog the CPU + I_Sleep(1); + } + +// +// run the count * ticdup dics +// + while (counts--) + { + for (i = 0; i < ticdup; i++) + { + if (gametic / ticdup > lowtic) + I_Error("gametic>lowtic"); + if (advancedemo) + H2_DoAdvanceDemo(); + MN_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 + } +} |