ZQ_PAUSE extension patch from GreEn`mArine
[divverent/darkplaces.git] / host.c
1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 See the GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18
19 */
20 // host.c -- coordinates spawning and killing of local servers
21
22 #include "quakedef.h"
23
24 #include <time.h>
25 #include "libcurl.h"
26 #include "cdaudio.h"
27 #include "cl_gecko.h"
28 #include "cl_video.h"
29 #include "progsvm.h"
30 #include "csprogs.h"
31 #include "sv_demo.h"
32
33 /*
34
35 A server can always be started, even if the system started out as a client
36 to a remote system.
37
38 A client can NOT be started if the system started as a dedicated server.
39
40 Memory is cleared / released when a server or client begins, not when they end.
41
42 */
43
44 // how many frames have occurred
45 // (checked by Host_Error and Host_SaveConfig_f)
46 int host_framecount = 0;
47 // LordHavoc: set when quit is executed
48 qboolean host_shuttingdown = false;
49
50 // the real time since application started, without any slowmo or clamping
51 double realtime;
52
53 // current client
54 client_t *host_client;
55
56 jmp_buf host_abortframe;
57
58 // pretend frames take this amount of time (in seconds), 0 = realtime
59 cvar_t host_framerate = {0, "host_framerate","0", "locks frame timing to this value in seconds, 0.05 is 20fps for example, note that this can easily run too fast, use cl_maxfps if you want to limit your framerate instead, or sys_ticrate to limit server speed"};
60 // shows time used by certain subsystems
61 cvar_t host_speeds = {0, "host_speeds","0", "reports how much time is used in server/graphics/sound"};
62 cvar_t cl_minfps = {CVAR_SAVE, "cl_minfps", "40", "minimum fps target - while the rendering performance is below this, it will drift toward lower quality"};
63 cvar_t cl_minfps_fade = {CVAR_SAVE, "cl_minfps_fade", "0.2", "how fast the quality adapts to varying framerate"};
64 cvar_t cl_minfps_qualitymax = {CVAR_SAVE, "cl_minfps_qualitymax", "1", "highest allowed drawdistance multiplier"};
65 cvar_t cl_minfps_qualitymin = {CVAR_SAVE, "cl_minfps_qualitymin", "0.25", "lowest allowed drawdistance multiplier"};
66 cvar_t cl_minfps_qualitypower = {CVAR_SAVE, "cl_minfps_qualitypower", "4", "raises quality value to a power of itself, higher values make quality drop more sharply in relation to framerate"};
67 cvar_t cl_minfps_qualityscale = {CVAR_SAVE, "cl_minfps_qualityscale", "0.5", "multiplier for quality"};
68 cvar_t cl_maxfps = {CVAR_SAVE, "cl_maxfps", "0", "maximum fps cap, 0 = unlimited, if game is running faster than this it will wait before running another frame (useful to make cpu time available to other programs)"};
69 cvar_t cl_maxidlefps = {CVAR_SAVE, "cl_maxidlefps", "20", "maximum fps cap when the game is not the active window (makes cpu time available to other programs"};
70
71 cvar_t developer = {0, "developer","0", "prints additional debugging messages and information (recommended for modders and level designers)"};
72 cvar_t developer_loadfile = {0, "developer_loadfile","0", "prints name and size of every file loaded via the FS_LoadFile function (which is almost everything)"};
73 cvar_t developer_loading = {0, "developer_loading","0", "prints information about files as they are loaded or unloaded successfully"};
74 cvar_t developer_entityparsing = {0, "developer_entityparsing", "0", "prints detailed network entities information each time a packet is received"};
75
76 cvar_t timestamps = {CVAR_SAVE, "timestamps", "0", "prints timestamps on console messages"};
77 cvar_t timeformat = {CVAR_SAVE, "timeformat", "[%Y-%m-%d %H:%M:%S] ", "time format to use on timestamped console messages"};
78
79 /*
80 ================
81 Host_AbortCurrentFrame
82
83 aborts the current host frame and goes on with the next one
84 ================
85 */
86 void Host_AbortCurrentFrame(void)
87 {
88         longjmp (host_abortframe, 1);
89 }
90
91 /*
92 ================
93 Host_Error
94
95 This shuts down both the client and server
96 ================
97 */
98 void Host_Error (const char *error, ...)
99 {
100         static char hosterrorstring1[MAX_INPUTLINE];
101         static char hosterrorstring2[MAX_INPUTLINE];
102         static qboolean hosterror = false;
103         va_list argptr;
104
105         // turn off rcon redirect if it was active when the crash occurred
106         // to prevent loops when it is a networking problem
107         Con_Rcon_Redirect_Abort();
108
109         va_start (argptr,error);
110         dpvsnprintf (hosterrorstring1,sizeof(hosterrorstring1),error,argptr);
111         va_end (argptr);
112
113         Con_Printf("Host_Error: %s\n", hosterrorstring1);
114
115         // LordHavoc: if crashing very early, or currently shutting down, do
116         // Sys_Error instead
117         if (host_framecount < 3 || host_shuttingdown)
118                 Sys_Error ("Host_Error: %s", hosterrorstring1);
119
120         if (hosterror)
121                 Sys_Error ("Host_Error: recursively entered (original error was: %s    new error is: %s)", hosterrorstring2, hosterrorstring1);
122         hosterror = true;
123
124         strlcpy(hosterrorstring2, hosterrorstring1, sizeof(hosterrorstring2));
125
126         CL_Parse_DumpPacket();
127
128         CL_Parse_ErrorCleanUp();
129
130         //PR_Crash();
131
132         // print out where the crash happened, if it was caused by QC (and do a cleanup)
133         PRVM_Crash();
134
135
136         Host_ShutdownServer ();
137
138         if (cls.state == ca_dedicated)
139                 Sys_Error ("Host_Error: %s",hosterrorstring2);  // dedicated servers exit
140
141         CL_Disconnect ();
142         cls.demonum = -1;
143
144         hosterror = false;
145
146         Host_AbortCurrentFrame();
147 }
148
149 void Host_ServerOptions (void)
150 {
151         int i;
152
153         // general default
154         svs.maxclients = 8;
155
156 // COMMANDLINEOPTION: Server: -dedicated [playerlimit] starts a dedicated server (with a command console), default playerlimit is 8
157 // COMMANDLINEOPTION: Server: -listen [playerlimit] starts a multiplayer server with graphical client, like singleplayer but other players can connect, default playerlimit is 8
158         // if no client is in the executable or -dedicated is specified on
159         // commandline, start a dedicated server
160         i = COM_CheckParm ("-dedicated");
161         if (i || !cl_available)
162         {
163                 cls.state = ca_dedicated;
164                 // check for -dedicated specifying how many players
165                 if (i && i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
166                         svs.maxclients = atoi (com_argv[i+1]);
167                 if (COM_CheckParm ("-listen"))
168                         Con_Printf ("Only one of -dedicated or -listen can be specified\n");
169                 // default sv_public on for dedicated servers (often hosted by serious administrators), off for listen servers (often hosted by clueless users)
170                 Cvar_SetValue("sv_public", 1);
171         }
172         else if (cl_available)
173         {
174                 // client exists and not dedicated, check if -listen is specified
175                 cls.state = ca_disconnected;
176                 i = COM_CheckParm ("-listen");
177                 if (i)
178                 {
179                         // default players unless specified
180                         if (i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
181                                 svs.maxclients = atoi (com_argv[i+1]);
182                 }
183                 else
184                 {
185                         // default players in some games, singleplayer in most
186                         if (gamemode != GAME_GOODVSBAD2 && gamemode != GAME_NEXUIZ && gamemode != GAME_BATTLEMECH)
187                                 svs.maxclients = 1;
188                 }
189         }
190
191         svs.maxclients = bound(1, svs.maxclients, MAX_SCOREBOARD);
192
193         svs.clients = (client_t *)Mem_Alloc(sv_mempool, sizeof(client_t) * svs.maxclients);
194
195         if (svs.maxclients > 1 && !deathmatch.integer && !coop.integer)
196                 Cvar_SetValueQuick(&deathmatch, 1);
197 }
198
199 /*
200 =======================
201 Host_InitLocal
202 ======================
203 */
204 void Host_SaveConfig_f(void);
205 void Host_LoadConfig_f(void);
206 extern cvar_t sv_writepicture_quality;
207 static void Host_InitLocal (void)
208 {
209         Cmd_AddCommand("saveconfig", Host_SaveConfig_f, "save settings to config.cfg (or a specified filename) immediately (also automatic when quitting)");
210         Cmd_AddCommand("loadconfig", Host_LoadConfig_f, "reset everything and reload configs");
211
212         Cvar_RegisterVariable (&host_framerate);
213         Cvar_RegisterVariable (&host_speeds);
214         Cvar_RegisterVariable (&cl_minfps);
215         Cvar_RegisterVariable (&cl_minfps_fade);
216         Cvar_RegisterVariable (&cl_minfps_qualitymax);
217         Cvar_RegisterVariable (&cl_minfps_qualitymin);
218         Cvar_RegisterVariable (&cl_minfps_qualitypower);
219         Cvar_RegisterVariable (&cl_minfps_qualityscale);
220         Cvar_RegisterVariable (&cl_maxfps);
221         Cvar_RegisterVariable (&cl_maxidlefps);
222
223         Cvar_RegisterVariable (&developer);
224         Cvar_RegisterVariable (&developer_loadfile);
225         Cvar_RegisterVariable (&developer_loading);
226         Cvar_RegisterVariable (&developer_entityparsing);
227
228         Cvar_RegisterVariable (&timestamps);
229         Cvar_RegisterVariable (&timeformat);
230
231         Cvar_RegisterVariable (&sv_writepicture_quality);
232 }
233
234
235 /*
236 ===============
237 Host_SaveConfig_f
238
239 Writes key bindings and archived cvars to config.cfg
240 ===============
241 */
242 void Host_SaveConfig_to(const char *file)
243 {
244         qfile_t *f;
245
246 // dedicated servers initialize the host but don't parse and set the
247 // config.cfg cvars
248         // LordHavoc: don't save a config if it crashed in startup
249         if (host_framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
250         {
251                 f = FS_OpenRealFile(file, "wb", false);
252                 if (!f)
253                 {
254                         Con_Printf("Couldn't write %s.\n", file);
255                         return;
256                 }
257
258                 Key_WriteBindings (f);
259                 Cvar_WriteVariables (f);
260
261                 FS_Close (f);
262         }
263 }
264 void Host_SaveConfig(void)
265 {
266         Host_SaveConfig_to("config.cfg");
267 }
268 void Host_SaveConfig_f(void)
269 {
270         const char *file = "config.cfg";
271
272         if(Cmd_Argc() >= 2) {
273                 file = Cmd_Argv(1);
274                 Con_Printf("Saving to %s\n", file);
275         }
276
277         Host_SaveConfig_to(file);
278 }
279
280 /*
281 ===============
282 Host_LoadConfig_f
283
284 Resets key bindings and cvars to defaults and then reloads scripts
285 ===============
286 */
287 void Host_LoadConfig_f(void)
288 {
289         // unlock the cvar default strings so they can be updated by the new default.cfg
290         Cvar_UnlockDefaults();
291         // reset cvars to their defaults, and then exec startup scripts again
292         Cbuf_InsertText("cvar_resettodefaults_all;exec quake.rc\n");
293 }
294
295 /*
296 =================
297 SV_ClientPrint
298
299 Sends text across to be displayed
300 FIXME: make this just a stuffed echo?
301 =================
302 */
303 void SV_ClientPrint(const char *msg)
304 {
305         if (host_client->netconnection)
306         {
307                 MSG_WriteByte(&host_client->netconnection->message, svc_print);
308                 MSG_WriteString(&host_client->netconnection->message, msg);
309         }
310 }
311
312 /*
313 =================
314 SV_ClientPrintf
315
316 Sends text across to be displayed
317 FIXME: make this just a stuffed echo?
318 =================
319 */
320 void SV_ClientPrintf(const char *fmt, ...)
321 {
322         va_list argptr;
323         char msg[MAX_INPUTLINE];
324
325         va_start(argptr,fmt);
326         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
327         va_end(argptr);
328
329         SV_ClientPrint(msg);
330 }
331
332 /*
333 =================
334 SV_BroadcastPrint
335
336 Sends text to all active clients
337 =================
338 */
339 void SV_BroadcastPrint(const char *msg)
340 {
341         int i;
342         client_t *client;
343
344         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
345         {
346                 if (client->active && client->netconnection)
347                 {
348                         MSG_WriteByte(&client->netconnection->message, svc_print);
349                         MSG_WriteString(&client->netconnection->message, msg);
350                 }
351         }
352
353         if (sv_echobprint.integer && cls.state == ca_dedicated)
354                 Con_Print(msg);
355 }
356
357 /*
358 =================
359 SV_BroadcastPrintf
360
361 Sends text to all active clients
362 =================
363 */
364 void SV_BroadcastPrintf(const char *fmt, ...)
365 {
366         va_list argptr;
367         char msg[MAX_INPUTLINE];
368
369         va_start(argptr,fmt);
370         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
371         va_end(argptr);
372
373         SV_BroadcastPrint(msg);
374 }
375
376 /*
377 =================
378 Host_ClientCommands
379
380 Send text over to the client to be executed
381 =================
382 */
383 void Host_ClientCommands(const char *fmt, ...)
384 {
385         va_list argptr;
386         char string[MAX_INPUTLINE];
387
388         if (!host_client->netconnection)
389                 return;
390
391         va_start(argptr,fmt);
392         dpvsnprintf(string, sizeof(string), fmt, argptr);
393         va_end(argptr);
394
395         MSG_WriteByte(&host_client->netconnection->message, svc_stufftext);
396         MSG_WriteString(&host_client->netconnection->message, string);
397 }
398
399 /*
400 =====================
401 SV_DropClient
402
403 Called when the player is getting totally kicked off the host
404 if (crash = true), don't bother sending signofs
405 =====================
406 */
407 void SV_DropClient(qboolean crash)
408 {
409         int i;
410         Con_Printf("Client \"%s\" dropped\n", host_client->name);
411
412         SV_StopDemoRecording(host_client);
413
414         // make sure edict is not corrupt (from a level change for example)
415         host_client->edict = PRVM_EDICT_NUM(host_client - svs.clients + 1);
416
417         if (host_client->netconnection)
418         {
419                 // free the client (the body stays around)
420                 if (!crash)
421                 {
422                         // LordHavoc: no opportunity for resending, so use unreliable 3 times
423                         unsigned char bufdata[8];
424                         sizebuf_t buf;
425                         memset(&buf, 0, sizeof(buf));
426                         buf.data = bufdata;
427                         buf.maxsize = sizeof(bufdata);
428                         MSG_WriteByte(&buf, svc_disconnect);
429                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
430                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
431                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
432                 }
433                 // break the net connection
434                 NetConn_Close(host_client->netconnection);
435                 host_client->netconnection = NULL;
436         }
437
438         // call qc ClientDisconnect function
439         // LordHavoc: don't call QC if server is dead (avoids recursive
440         // Host_Error in some mods when they run out of edicts)
441         if (host_client->clientconnectcalled && sv.active && host_client->edict)
442         {
443                 // call the prog function for removing a client
444                 // this will set the body to a dead frame, among other things
445                 int saveSelf = prog->globals.server->self;
446                 host_client->clientconnectcalled = false;
447                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
448                 PRVM_ExecuteProgram(prog->globals.server->ClientDisconnect, "QC function ClientDisconnect is missing");
449                 prog->globals.server->self = saveSelf;
450         }
451
452         // if a download is active, close it
453         if (host_client->download_file)
454         {
455                 Con_DPrintf("Download of %s aborted when %s dropped\n", host_client->download_name, host_client->name);
456                 FS_Close(host_client->download_file);
457                 host_client->download_file = NULL;
458                 host_client->download_name[0] = 0;
459                 host_client->download_expectedposition = 0;
460                 host_client->download_started = false;
461         }
462
463         // remove leaving player from scoreboard
464         host_client->name[0] = 0;
465         host_client->colors = 0;
466         host_client->frags = 0;
467         // send notification to all clients
468         // get number of client manually just to make sure we get it right...
469         i = host_client - svs.clients;
470         MSG_WriteByte (&sv.reliable_datagram, svc_updatename);
471         MSG_WriteByte (&sv.reliable_datagram, i);
472         MSG_WriteString (&sv.reliable_datagram, host_client->name);
473         MSG_WriteByte (&sv.reliable_datagram, svc_updatecolors);
474         MSG_WriteByte (&sv.reliable_datagram, i);
475         MSG_WriteByte (&sv.reliable_datagram, host_client->colors);
476         MSG_WriteByte (&sv.reliable_datagram, svc_updatefrags);
477         MSG_WriteByte (&sv.reliable_datagram, i);
478         MSG_WriteShort (&sv.reliable_datagram, host_client->frags);
479
480         // free the client now
481         if (host_client->entitydatabase)
482                 EntityFrame_FreeDatabase(host_client->entitydatabase);
483         if (host_client->entitydatabase4)
484                 EntityFrame4_FreeDatabase(host_client->entitydatabase4);
485         if (host_client->entitydatabase5)
486                 EntityFrame5_FreeDatabase(host_client->entitydatabase5);
487
488         if (sv.active)
489         {
490                 // clear a fields that matter to DP_SV_CLIENTNAME and DP_SV_CLIENTCOLORS, and also frags
491                 PRVM_ED_ClearEdict(host_client->edict);
492         }
493
494         // clear the client struct (this sets active to false)
495         memset(host_client, 0, sizeof(*host_client));
496
497         // update server listing on the master because player count changed
498         // (which the master uses for filtering empty/full servers)
499         NetConn_Heartbeat(1);
500
501         if (sv.loadgame)
502         {
503                 for (i = 0;i < svs.maxclients;i++)
504                         if (svs.clients[i].active && !svs.clients[i].spawned)
505                                 break;
506                 if (i == svs.maxclients)
507                 {
508                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
509                         sv.paused = sv.loadgame = false; // we're basically done with loading now
510                 }
511         }
512 }
513
514 /*
515 ==================
516 Host_ShutdownServer
517
518 This only happens at the end of a game, not between levels
519 ==================
520 */
521 void Host_ShutdownServer(void)
522 {
523         int i;
524
525         Con_DPrintf("Host_ShutdownServer\n");
526
527         if (!sv.active)
528                 return;
529
530         NetConn_Heartbeat(2);
531         NetConn_Heartbeat(2);
532
533 // make sure all the clients know we're disconnecting
534         SV_VM_Begin();
535         if(prog->loaded)
536                 if(prog->funcoffsets.SV_Shutdown)
537                 {
538                         func_t s = prog->funcoffsets.SV_Shutdown;
539                         prog->funcoffsets.SV_Shutdown = 0; // prevent it from getting called again
540                         PRVM_ExecuteProgram(s,"SV_Shutdown() required");
541                 }
542         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
543                 if (host_client->active)
544                         SV_DropClient(false); // server shutdown
545         SV_VM_End();
546
547         NetConn_CloseServerPorts();
548
549         sv.active = false;
550 //
551 // clear structures
552 //
553         memset(&sv, 0, sizeof(sv));
554         memset(svs.clients, 0, svs.maxclients*sizeof(client_t));
555 }
556
557
558 //============================================================================
559
560 /*
561 ===================
562 Host_GetConsoleCommands
563
564 Add them exactly as if they had been typed at the console
565 ===================
566 */
567 void Host_GetConsoleCommands (void)
568 {
569         char *cmd;
570
571         while (1)
572         {
573                 cmd = Sys_ConsoleInput ();
574                 if (!cmd)
575                         break;
576                 Cbuf_AddText (cmd);
577         }
578 }
579
580 /*
581 ==================
582 Host_TimeReport
583
584 Returns a time report string, for example for
585 ==================
586 */
587 const char *Host_TimingReport()
588 {
589         return va("%.1f%% CPU, %.2f%% lost, offset avg %.1fms, max %.1fms, sdev %.1fms", svs.perf_cpuload * 100, svs.perf_lost * 100, svs.perf_offset_avg * 1000, svs.perf_offset_max * 1000, svs.perf_offset_sdev * 1000);
590 }
591
592 /*
593 ==================
594 Host_Frame
595
596 Runs all active servers
597 ==================
598 */
599 static void Host_Init(void);
600 void Host_Main(void)
601 {
602         double time1 = 0;
603         double time2 = 0;
604         double time3 = 0;
605         double cl_timer, sv_timer;
606         double clframetime, deltarealtime, oldrealtime;
607         double wait;
608         int pass1, pass2, pass3, i;
609
610         Host_Init();
611
612         cl_timer = 0;
613         sv_timer = 0;
614
615         realtime = Sys_DoubleTime();
616         for (;;)
617         {
618                 if (setjmp(host_abortframe))
619                         continue;                       // something bad happened, or the server disconnected
620
621                 oldrealtime = realtime;
622                 realtime = Sys_DoubleTime();
623
624                 deltarealtime = realtime - oldrealtime;
625                 cl_timer += deltarealtime;
626                 sv_timer += deltarealtime;
627
628                 svs.perf_acc_realtime += deltarealtime;
629
630                 // Look for clients who have spawned
631                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
632                         if(host_client->spawned)
633                                 if(host_client->netconnection)
634                                         break;
635                 if(i == svs.maxclients)
636                 {
637                         // Nobody is looking? Then we won't do timing...
638                         // Instead, reset it to zero
639                         svs.perf_acc_realtime = svs.perf_acc_sleeptime = svs.perf_acc_lost = svs.perf_acc_offset = svs.perf_acc_offset_squared = svs.perf_acc_offset_max = svs.perf_acc_offset_samples = 0;
640                 }
641                 else if(svs.perf_acc_realtime > 5)
642                 {
643                         svs.perf_cpuload = 1 - svs.perf_acc_sleeptime / svs.perf_acc_realtime;
644                         svs.perf_lost = svs.perf_acc_lost / svs.perf_acc_realtime;
645                         if(svs.perf_acc_offset_samples > 0)
646                         {
647                                 svs.perf_offset_max = svs.perf_acc_offset_max;
648                                 svs.perf_offset_avg = svs.perf_acc_offset / svs.perf_acc_offset_samples;
649                                 svs.perf_offset_sdev = sqrt(svs.perf_acc_offset_squared / svs.perf_acc_offset_samples - svs.perf_offset_avg * svs.perf_offset_avg);
650                         }
651                         if(svs.perf_lost > 0)
652                                 Con_DPrintf("Server can't keep up: %s\n", Host_TimingReport());
653                         svs.perf_acc_realtime = svs.perf_acc_sleeptime = svs.perf_acc_lost = svs.perf_acc_offset = svs.perf_acc_offset_squared = svs.perf_acc_offset_max = svs.perf_acc_offset_samples = 0;
654                 }
655
656                 if (slowmo.value < 0.00001 && slowmo.value != 0)
657                         Cvar_SetValue("slowmo", 0);
658                 if (host_framerate.value < 0.00001 && host_framerate.value != 0)
659                         Cvar_SetValue("host_framerate", 0);
660
661                 // keep the random time dependent, but not when playing demos/benchmarking
662                 if(!*sv_random_seed.string && !cls.demoplayback)
663                         rand();
664
665                 cl.islocalgame = NetConn_IsLocalGame();
666
667                 // begin gathering mouse input
668                 in_mouse_x = in_mouse_y = 0;
669
670                 // get new key events
671                 Sys_SendKeyEvents();
672
673                 NetConn_UpdateSockets();
674
675                 Log_DestBuffer_Flush();
676
677                 // receive packets on each main loop iteration, as the main loop may
678                 // be undersleeping due to select() detecting a new packet
679                 if (sv.active)
680                         NetConn_ServerFrame();
681
682                 Curl_Run();
683
684                 // check for commands typed to the host
685                 Host_GetConsoleCommands();
686
687                 // when a server is running we only execute console commands on server frames
688                 // (this mainly allows frikbot .way config files to work properly by staying in sync with the server qc)
689                 // otherwise we execute them on client frames
690                 if (sv.active ? sv_timer > 0 : cl_timer > 0)
691                 {
692                         // process console commands
693                         Cbuf_Execute();
694                 }
695
696                 //Con_Printf("%6.0f %6.0f\n", cl_timer * 1000000.0, sv_timer * 1000000.0);
697
698                 // if the accumulators haven't become positive yet, wait a while
699                 if (cls.state == ca_dedicated)
700                         wait = sv_timer * -1000000.0;
701                 else if (!sv.active)
702                         wait = cl_timer * -1000000.0;
703                 else
704                         wait = max(cl_timer, sv_timer) * -1000000.0;
705                 wait = bound(0, wait, 100000);
706
707                 if (!cls.timedemo && wait >= 1)
708                 {
709                         double time0 = Sys_DoubleTime();
710                         if (sv_checkforpacketsduringsleep.integer)
711                                 NetConn_SleepMicroseconds((int)wait);
712                         else
713                                 Sys_Sleep((int)wait);
714                         svs.perf_acc_sleeptime += Sys_DoubleTime() - time0;
715                         continue;
716                 }
717
718         //-------------------
719         //
720         // server operations
721         //
722         //-------------------
723
724                 // limit the frametime steps to no more than 100ms each
725                 if (cl_timer > 0.1)
726                         cl_timer = 0.1;
727                 if (sv_timer > 0.1)
728                 {
729                         svs.perf_acc_lost += (sv_timer - 0.1);
730                         sv_timer = 0.1;
731                 }
732
733                 if (sv.active && sv_timer > 0)
734                 {
735                         // execute one or more server frames, with an upper limit on how much
736                         // execution time to spend on server frames to avoid freezing the game if
737                         // the server is overloaded, this execution time limit means the game will
738                         // slow down if the server is taking too long.
739                         int framecount, framelimit = 1;
740                         double advancetime, aborttime = 0;
741                         float offset;
742
743                         // run the world state
744                         // don't allow simulation to run too fast or too slow or logic glitches can occur
745
746                         // stop running server frames if the wall time reaches this value
747                         if (sys_ticrate.value <= 0)
748                                 advancetime = sv_timer;
749                         else if (cl.islocalgame && !sv_fixedframeratesingleplayer.integer)
750                         {
751                                 // synchronize to the client frametime, but no less than 10ms and no more than sys_ticrate
752                                 advancetime = bound(0.01, cl_timer, sys_ticrate.value);
753                                 framelimit = 10;
754                                 aborttime = realtime + 0.1;
755                         }
756                         else
757                         {
758                                 advancetime = sys_ticrate.value;
759                                 // listen servers can run multiple server frames per client frame
760                                 if (cls.state == ca_connected)
761                                 {
762                                         framelimit = 10;
763                                         aborttime = realtime + 0.1;
764                                 }
765                         }
766                         advancetime = min(advancetime, 0.1);
767
768                         if(advancetime > 0)
769                         {
770                                 offset = sv_timer + (Sys_DoubleTime() - realtime);
771                                 ++svs.perf_acc_offset_samples;
772                                 svs.perf_acc_offset += offset;
773                                 svs.perf_acc_offset_squared += offset * offset;
774                                 if(svs.perf_acc_offset_max < offset)
775                                         svs.perf_acc_offset_max = offset;
776                         }
777
778                         // only advance time if not paused
779                         // the game also pauses in singleplayer when menu or console is used
780                         sv.frametime = advancetime * slowmo.value;
781                         if (host_framerate.value)
782                                 sv.frametime = host_framerate.value;
783                         if (sv.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive)))
784                                 sv.frametime = 0;
785
786                         // setup the VM frame
787                         SV_VM_Begin();
788
789                         for (framecount = 0;framecount < framelimit && sv_timer > 0;framecount++)
790                         {
791                                 sv_timer -= advancetime;
792
793                                 // move things around and think unless paused
794                                 if (sv.frametime)
795                                         SV_Physics();
796
797                                 // if this server frame took too long, break out of the loop
798                                 if (framelimit > 1 && Sys_DoubleTime() >= aborttime)
799                                         break;
800                         }
801
802                         // send all messages to the clients
803                         SV_SendClientMessages();
804                         
805                         if (sv.paused == 1 && realtime > sv.pausedstart && sv.pausedstart > 0) {
806                                 prog->globals.generic[OFS_PARM0] = realtime - sv.pausedstart;
807                                 PRVM_ExecuteProgram(prog->funcoffsets.SV_PausedTic, "QC function SV_PausedTic is missing");
808                         }
809
810                         // end the server VM frame
811                         SV_VM_End();
812
813                         // send an heartbeat if enough time has passed since the last one
814                         NetConn_Heartbeat(0);
815                 }
816
817         //-------------------
818         //
819         // client operations
820         //
821         //-------------------
822
823                 if (cls.state != ca_dedicated && (cl_timer > 0 || cls.timedemo))
824                 {
825                         // decide the simulation time
826                         if (cls.capturevideo.active)
827                         {
828                                 if (cls.capturevideo.realtime)
829                                         clframetime = cl.realframetime = max(cl_timer, 1.0 / cls.capturevideo.framerate);
830                                 else
831                                 {
832                                         clframetime = 1.0 / cls.capturevideo.framerate;
833                                         cl.realframetime = max(cl_timer, clframetime);
834                                 }
835                         }
836                         else if (vid_activewindow && cl_maxfps.value >= 1)
837                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / cl_maxfps.value);
838                         else if (!vid_activewindow && cl_maxidlefps.value >= 1)
839                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / cl_maxidlefps.value);
840                         else
841                                 clframetime = cl.realframetime = cl_timer;
842
843                         // apply slowmo scaling
844                         clframetime *= cl.movevars_timescale;
845                         // scale playback speed of demos by slowmo cvar
846                         if (cls.demoplayback)
847                         {
848                                 clframetime *= slowmo.value;
849                                 // if demo playback is paused, don't advance time at all
850                                 if (cls.demopaused)
851                                         clframetime = 0;
852                         }
853
854                         // host_framerate overrides all else
855                         if (host_framerate.value)
856                                 clframetime = host_framerate.value;
857
858                         if (cls.timedemo)
859                                 clframetime = cl.realframetime = cl_timer;
860
861                         // deduct the frame time from the accumulator
862                         cl_timer -= cl.realframetime;
863
864                         cl.oldtime = cl.time;
865                         cl.time += clframetime;
866
867                         // Collect input into cmd
868                         CL_Input();
869
870                         // check for new packets
871                         NetConn_ClientFrame();
872
873                         // read a new frame from a demo if needed
874                         CL_ReadDemoMessage();
875
876                         // now that packets have been read, send input to server
877                         CL_SendMove();
878
879                         // update client world (interpolate entities, create trails, etc)
880                         CL_UpdateWorld();
881
882                         // update video
883                         if (host_speeds.integer)
884                                 time1 = Sys_DoubleTime();
885
886                         CL_Video_Frame();
887                         CL_Gecko_Frame();
888
889                         CL_UpdateScreen();
890
891                         if (host_speeds.integer)
892                                 time2 = Sys_DoubleTime();
893
894                         // update audio
895                         if(cl.csqc_usecsqclistener)
896                         {
897                                 S_Update(&cl.csqc_listenermatrix);
898                                 cl.csqc_usecsqclistener = false;
899                         }
900                         else
901                                 S_Update(&r_refdef.view.matrix);
902
903                         CDAudio_Update();
904
905                         if (host_speeds.integer)
906                         {
907                                 pass1 = (int)((time1 - time3)*1000000);
908                                 time3 = Sys_DoubleTime();
909                                 pass2 = (int)((time2 - time1)*1000000);
910                                 pass3 = (int)((time3 - time2)*1000000);
911                                 Con_Printf("%6ius total %6ius server %6ius gfx %6ius snd\n",
912                                                         pass1+pass2+pass3, pass1, pass2, pass3);
913                         }
914                 }
915
916                 // if there is some time remaining from this frame, reset the timers
917                 if (cl_timer >= 0)
918                         cl_timer = 0;
919                 if (sv_timer >= 0)
920                 {
921                         svs.perf_acc_lost += sv_timer;
922                         sv_timer = 0;
923                 }
924
925                 host_framecount++;
926         }
927 }
928
929 //============================================================================
930
931 qboolean vid_opened = false;
932 void Host_StartVideo(void)
933 {
934         if (!vid_opened && cls.state != ca_dedicated)
935         {
936                 vid_opened = true;
937                 // make sure we open sockets before opening video because the Windows Firewall "unblock?" dialog can screw up the graphics context on some graphics drivers
938                 NetConn_UpdateSockets();
939                 VID_Start();
940                 CDAudio_Startup();
941         }
942 }
943
944 char engineversion[128];
945
946 qboolean sys_nostdout = false;
947
948 extern void Render_Init(void);
949 extern void Mathlib_Init(void);
950 extern void FS_Init(void);
951 extern void FS_Shutdown(void);
952 extern void PR_Cmd_Init(void);
953 extern void COM_Init_Commands(void);
954 extern void FS_Init_Commands(void);
955 extern qboolean host_stuffcmdsrun;
956
957 /*
958 ====================
959 Host_Init
960 ====================
961 */
962 static void Host_Init (void)
963 {
964         int i;
965         const char* os;
966
967         if (COM_CheckParm("-profilegameonly"))
968                 Sys_AllowProfiling(false);
969
970         // LordHavoc: quake never seeded the random number generator before... heh
971         if (COM_CheckParm("-benchmark"))
972                 srand(0); // predictable random sequence for -benchmark
973         else
974                 srand(time(NULL));
975
976         // FIXME: this is evil, but possibly temporary
977 // COMMANDLINEOPTION: Console: -developer enables warnings and other notices (RECOMMENDED for mod developers)
978         if (COM_CheckParm("-developer"))
979         {
980                 developer.value = developer.integer = 1;
981                 developer.string = "1";
982         }
983
984         if (COM_CheckParm("-developer2"))
985         {
986                 developer.value = developer.integer = 100;
987                 developer.string = "100";
988                 developer_memory.value = developer_memory.integer = 100;
989                 developer.string = "100";
990                 developer_memorydebug.value = developer_memorydebug.integer = 100;
991                 developer_memorydebug.string = "100";
992         }
993
994 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
995         if (COM_CheckParm("-nostdout"))
996                 sys_nostdout = 1;
997
998         // used by everything
999         Memory_Init();
1000
1001         // initialize console command/cvar/alias/command execution systems
1002         Cmd_Init();
1003
1004         // initialize memory subsystem cvars/commands
1005         Memory_Init_Commands();
1006
1007         // initialize console and logging and its cvars/commands
1008         Con_Init();
1009
1010         // initialize various cvars that could not be initialized earlier
1011         Curl_Init_Commands();
1012         Cmd_Init_Commands();
1013         Sys_Init_Commands();
1014         COM_Init_Commands();
1015         FS_Init_Commands();
1016
1017         // initialize console window (only used by sys_win.c)
1018         Sys_InitConsole();
1019
1020         // detect gamemode from commandline options or executable name
1021         COM_InitGameType();
1022
1023         // construct a version string for the corner of the console
1024         os = DP_OS_NAME;
1025         dpsnprintf (engineversion, sizeof (engineversion), "%s %s %s", gamename, os, buildstring);
1026         Con_Printf("%s\n", engineversion);
1027
1028         // initialize ixtable
1029         Mathlib_Init();
1030
1031         // initialize filesystem (including fs_basedir, fs_gamedir, -game, scr_screenshot_name)
1032         FS_Init();
1033
1034         NetConn_Init();
1035         Curl_Init();
1036         //PR_Init();
1037         //PR_Cmd_Init();
1038         PRVM_Init();
1039         Mod_Init();
1040         World_Init();
1041         SV_Init();
1042         Host_InitCommands();
1043         Host_InitLocal();
1044         Host_ServerOptions();
1045
1046         if (cls.state == ca_dedicated)
1047                 Cmd_AddCommand ("disconnect", CL_Disconnect_f, "disconnect from server (or disconnect all clients if running a server)");
1048         else
1049         {
1050                 Con_DPrintf("Initializing client\n");
1051
1052                 R_Modules_Init();
1053                 Palette_Init();
1054                 MR_Init_Commands();
1055                 VID_Shared_Init();
1056                 VID_Init();
1057                 Render_Init();
1058                 S_Init();
1059                 CDAudio_Init();
1060                 Key_Init();
1061                 V_Init();
1062                 CL_Init();
1063         }
1064
1065         // set up the default startmap_sp and startmap_dm aliases (mods can
1066         // override these) and then execute the quake.rc startup script
1067         if (gamemode == GAME_NEHAHRA)
1068                 Cbuf_AddText("alias startmap_sp \"map nehstart\"\nalias startmap_dm \"map nehstart\"\nexec quake.rc\n");
1069         else if (gamemode == GAME_TRANSFUSION)
1070                 Cbuf_AddText("alias startmap_sp \"map e1m1\"\n""alias startmap_dm \"map bb1\"\nexec quake.rc\n");
1071         else if (gamemode == GAME_TEU)
1072                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec teu.rc\n");
1073         else
1074                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec quake.rc\n");
1075         Cbuf_Execute();
1076
1077         // if stuffcmds wasn't run, then quake.rc is probably missing, use default
1078         if (!host_stuffcmdsrun)
1079         {
1080                 Cbuf_AddText("exec default.cfg\nexec config.cfg\nexec autoexec.cfg\nstuffcmds\n");
1081                 Cbuf_Execute();
1082         }
1083
1084         // put up the loading image so the user doesn't stare at a black screen...
1085         SCR_BeginLoadingPlaque();
1086
1087         // FIXME: put this into some neat design, but the menu should be allowed to crash
1088         // without crashing the whole game, so this should just be a short-time solution
1089
1090         // here comes the not so critical stuff
1091         if (setjmp(host_abortframe)) {
1092                 return;
1093         }
1094
1095         if (cls.state != ca_dedicated)
1096         {
1097                 MR_Init();
1098         }
1099
1100         // check for special benchmark mode
1101 // COMMANDLINEOPTION: Client: -benchmark <demoname> runs a timedemo and quits, results of any timedemo can be found in gamedir/benchmark.log (for example id1/benchmark.log)
1102         i = COM_CheckParm("-benchmark");
1103         if (i && i + 1 < com_argc)
1104         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1105         {
1106                 Cbuf_AddText(va("timedemo %s\n", com_argv[i + 1]));
1107                 Cbuf_Execute();
1108         }
1109
1110         // check for special demo mode
1111 // COMMANDLINEOPTION: Client: -demo <demoname> runs a playdemo and quits
1112         i = COM_CheckParm("-demo");
1113         if (i && i + 1 < com_argc)
1114         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1115         {
1116                 Cbuf_AddText(va("playdemo %s\n", com_argv[i + 1]));
1117                 Cbuf_Execute();
1118         }
1119
1120 // COMMANDLINEOPTION: Client: -capturedemo <demoname> captures a playdemo and quits
1121         i = COM_CheckParm("-capturedemo");
1122         if (i && i + 1 < com_argc)
1123         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1124         {
1125                 Cbuf_AddText(va("playdemo %s\ncl_capturevideo 1\n", com_argv[i + 1]));
1126                 Cbuf_Execute();
1127         }
1128
1129         if (cls.state == ca_dedicated || COM_CheckParm("-listen"))
1130         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1131         {
1132                 Cbuf_AddText("startmap_dm\n");
1133                 Cbuf_Execute();
1134         }
1135
1136         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1137         {
1138                 Cbuf_AddText("togglemenu\n");
1139                 Cbuf_Execute();
1140         }
1141
1142         Con_DPrint("========Initialized=========\n");
1143
1144         //Host_StartVideo();
1145 }
1146
1147
1148 /*
1149 ===============
1150 Host_Shutdown
1151
1152 FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
1153 to run quit through here before the final handoff to the sys code.
1154 ===============
1155 */
1156 void Host_Shutdown(void)
1157 {
1158         static qboolean isdown = false;
1159
1160         if (isdown)
1161         {
1162                 Con_Print("recursive shutdown\n");
1163                 return;
1164         }
1165         if (setjmp(host_abortframe))
1166         {
1167                 Con_Print("aborted the quitting frame?!?\n");
1168                 return;
1169         }
1170         isdown = true;
1171
1172         // be quiet while shutting down
1173         S_StopAllSounds();
1174
1175         // disconnect client from server if active
1176         CL_Disconnect();
1177
1178         // shut down local server if active
1179         Host_ShutdownServer ();
1180
1181         // Shutdown menu
1182         if(MR_Shutdown)
1183                 MR_Shutdown();
1184
1185         // AK shutdown PRVM
1186         // AK hmm, no PRVM_Shutdown(); yet
1187
1188         CL_Gecko_Shutdown();
1189         CL_Video_Shutdown();
1190
1191         Host_SaveConfig();
1192
1193         CDAudio_Shutdown ();
1194         S_Terminate ();
1195         Curl_Shutdown ();
1196         NetConn_Shutdown ();
1197         //PR_Shutdown ();
1198
1199         if (cls.state != ca_dedicated)
1200         {
1201                 R_Modules_Shutdown();
1202                 VID_Shutdown();
1203         }
1204
1205         Cmd_Shutdown();
1206         CL_Shutdown();
1207         Sys_Shutdown();
1208         Log_Close();
1209         FS_Shutdown();
1210         Memory_Shutdown();
1211 }
1212