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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 #include "snd_main.h"
33
34 /*
35
36 A server can always be started, even if the system started out as a client
37 to a remote system.
38
39 A client can NOT be started if the system started as a dedicated server.
40
41 Memory is cleared / released when a server or client begins, not when they end.
42
43 */
44
45 // how many frames have occurred
46 // (checked by Host_Error and Host_SaveConfig_f)
47 int host_framecount = 0;
48 // LordHavoc: set when quit is executed
49 qboolean host_shuttingdown = false;
50
51 // the real time since application started, without any slowmo or clamping
52 double realtime;
53
54 // current client
55 client_t *host_client;
56
57 jmp_buf host_abortframe;
58 double host_starttime = 0;
59
60 // pretend frames take this amount of time (in seconds), 0 = realtime
61 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"};
62 // shows time used by certain subsystems
63 cvar_t host_speeds = {0, "host_speeds","0", "reports how much time is used in server/graphics/sound"};
64 cvar_t host_maxwait = {0, "host_maxwait","1000", "maximum sleep time requested from the operating system in millisecond. Larger sleeps will be done using multiple host_maxwait length sleeps. Lowering this value will increase CPU load, but may help working around problems with accuracy of sleep times."};
65 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"};
66 cvar_t cl_minfps_fade = {CVAR_SAVE, "cl_minfps_fade", "0.2", "how fast the quality adapts to varying framerate"};
67 cvar_t cl_minfps_qualitymax = {CVAR_SAVE, "cl_minfps_qualitymax", "1", "highest allowed drawdistance multiplier"};
68 cvar_t cl_minfps_qualitymin = {CVAR_SAVE, "cl_minfps_qualitymin", "0.25", "lowest allowed drawdistance multiplier"};
69 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"};
70 cvar_t cl_minfps_qualityscale = {CVAR_SAVE, "cl_minfps_qualityscale", "0.5", "multiplier for quality"};
71 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)"};
72 cvar_t cl_maxfps_alwayssleep = {0, "cl_maxfps_alwayssleep","1", "gives up some processing time to other applications each frame, value in milliseconds, disabled if cl_maxfps is 0"};
73 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"};
74
75 cvar_t developer = {CVAR_SAVE, "developer","0", "shows debugging messages and information (recommended for all developers and level designers); the value -1 also suppresses buffering and logging these messages"};
76 cvar_t developer_extra = {0, "developer_extra", "0", "prints additional debugging messages, often very verbose!"};
77 cvar_t developer_insane = {0, "developer_insane", "0", "prints huge streams of information about internal workings, entire contents of files being read/written, etc.  Not recommended!"};
78 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)"};
79 cvar_t developer_loading = {0, "developer_loading","0", "prints information about files as they are loaded or unloaded successfully"};
80 cvar_t developer_entityparsing = {0, "developer_entityparsing", "0", "prints detailed network entities information each time a packet is received"};
81
82 cvar_t timestamps = {CVAR_SAVE, "timestamps", "0", "prints timestamps on console messages"};
83 cvar_t timeformat = {CVAR_SAVE, "timeformat", "[%Y-%m-%d %H:%M:%S] ", "time format to use on timestamped console messages"};
84
85 /*
86 ================
87 Host_AbortCurrentFrame
88
89 aborts the current host frame and goes on with the next one
90 ================
91 */
92 void Host_AbortCurrentFrame(void)
93 {
94         longjmp (host_abortframe, 1);
95 }
96
97 /*
98 ================
99 Host_Error
100
101 This shuts down both the client and server
102 ================
103 */
104 void Host_Error (const char *error, ...)
105 {
106         static char hosterrorstring1[MAX_INPUTLINE];
107         static char hosterrorstring2[MAX_INPUTLINE];
108         static qboolean hosterror = false;
109         va_list argptr;
110
111         // turn off rcon redirect if it was active when the crash occurred
112         // to prevent loops when it is a networking problem
113         Con_Rcon_Redirect_Abort();
114
115         va_start (argptr,error);
116         dpvsnprintf (hosterrorstring1,sizeof(hosterrorstring1),error,argptr);
117         va_end (argptr);
118
119         Con_Printf("Host_Error: %s\n", hosterrorstring1);
120
121         // LordHavoc: if crashing very early, or currently shutting down, do
122         // Sys_Error instead
123         if (host_framecount < 3 || host_shuttingdown)
124                 Sys_Error ("Host_Error: %s", hosterrorstring1);
125
126         if (hosterror)
127                 Sys_Error ("Host_Error: recursively entered (original error was: %s    new error is: %s)", hosterrorstring2, hosterrorstring1);
128         hosterror = true;
129
130         strlcpy(hosterrorstring2, hosterrorstring1, sizeof(hosterrorstring2));
131
132         CL_Parse_DumpPacket();
133
134         CL_Parse_ErrorCleanUp();
135
136         //PR_Crash();
137
138         // print out where the crash happened, if it was caused by QC (and do a cleanup)
139         PRVM_Crash();
140
141
142         Host_ShutdownServer ();
143
144         if (cls.state == ca_dedicated)
145                 Sys_Error ("Host_Error: %s",hosterrorstring2);  // dedicated servers exit
146
147         CL_Disconnect ();
148         cls.demonum = -1;
149
150         hosterror = false;
151
152         Host_AbortCurrentFrame();
153 }
154
155 void Host_ServerOptions (void)
156 {
157         int i;
158
159         // general default
160         svs.maxclients = 8;
161
162 // COMMANDLINEOPTION: Server: -dedicated [playerlimit] starts a dedicated server (with a command console), default playerlimit is 8
163 // COMMANDLINEOPTION: Server: -listen [playerlimit] starts a multiplayer server with graphical client, like singleplayer but other players can connect, default playerlimit is 8
164         // if no client is in the executable or -dedicated is specified on
165         // commandline, start a dedicated server
166         i = COM_CheckParm ("-dedicated");
167         if (i || !cl_available)
168         {
169                 cls.state = ca_dedicated;
170                 // check for -dedicated specifying how many players
171                 if (i && i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
172                         svs.maxclients = atoi (com_argv[i+1]);
173                 if (COM_CheckParm ("-listen"))
174                         Con_Printf ("Only one of -dedicated or -listen can be specified\n");
175                 // default sv_public on for dedicated servers (often hosted by serious administrators), off for listen servers (often hosted by clueless users)
176                 Cvar_SetValue("sv_public", 1);
177         }
178         else if (cl_available)
179         {
180                 // client exists and not dedicated, check if -listen is specified
181                 cls.state = ca_disconnected;
182                 i = COM_CheckParm ("-listen");
183                 if (i)
184                 {
185                         // default players unless specified
186                         if (i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
187                                 svs.maxclients = atoi (com_argv[i+1]);
188                 }
189                 else
190                 {
191                         // default players in some games, singleplayer in most
192                         if (gamemode != GAME_GOODVSBAD2 && gamemode != GAME_NEXUIZ && gamemode != GAME_BATTLEMECH)
193                                 svs.maxclients = 1;
194                 }
195         }
196
197         svs.maxclients = svs.maxclients_next = bound(1, svs.maxclients, MAX_SCOREBOARD);
198
199         svs.clients = (client_t *)Mem_Alloc(sv_mempool, sizeof(client_t) * svs.maxclients);
200
201         if (svs.maxclients > 1 && !deathmatch.integer && !coop.integer)
202                 Cvar_SetValueQuick(&deathmatch, 1);
203 }
204
205 /*
206 =======================
207 Host_InitLocal
208 ======================
209 */
210 void Host_SaveConfig_f(void);
211 void Host_LoadConfig_f(void);
212 extern cvar_t sv_writepicture_quality;
213 static void Host_InitLocal (void)
214 {
215         Cmd_AddCommand("saveconfig", Host_SaveConfig_f, "save settings to config.cfg (or a specified filename) immediately (also automatic when quitting)");
216         Cmd_AddCommand("loadconfig", Host_LoadConfig_f, "reset everything and reload configs");
217
218         Cvar_RegisterVariable (&host_framerate);
219         Cvar_RegisterVariable (&host_speeds);
220         Cvar_RegisterVariable (&host_maxwait);
221         Cvar_RegisterVariable (&cl_minfps);
222         Cvar_RegisterVariable (&cl_minfps_fade);
223         Cvar_RegisterVariable (&cl_minfps_qualitymax);
224         Cvar_RegisterVariable (&cl_minfps_qualitymin);
225         Cvar_RegisterVariable (&cl_minfps_qualitypower);
226         Cvar_RegisterVariable (&cl_minfps_qualityscale);
227         Cvar_RegisterVariable (&cl_maxfps);
228         Cvar_RegisterVariable (&cl_maxfps_alwayssleep);
229         Cvar_RegisterVariable (&cl_maxidlefps);
230
231         Cvar_RegisterVariable (&developer);
232         Cvar_RegisterVariable (&developer_extra);
233         Cvar_RegisterVariable (&developer_insane);
234         Cvar_RegisterVariable (&developer_loadfile);
235         Cvar_RegisterVariable (&developer_loading);
236         Cvar_RegisterVariable (&developer_entityparsing);
237
238         Cvar_RegisterVariable (&timestamps);
239         Cvar_RegisterVariable (&timeformat);
240
241         Cvar_RegisterVariable (&sv_writepicture_quality);
242 }
243
244
245 /*
246 ===============
247 Host_SaveConfig_f
248
249 Writes key bindings and archived cvars to config.cfg
250 ===============
251 */
252 void Host_SaveConfig_to(const char *file)
253 {
254         qfile_t *f;
255
256 // dedicated servers initialize the host but don't parse and set the
257 // config.cfg cvars
258         // LordHavoc: don't save a config if it crashed in startup
259         if (host_framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
260         {
261                 f = FS_OpenRealFile(file, "wb", false);
262                 if (!f)
263                 {
264                         Con_Printf("Couldn't write %s.\n", file);
265                         return;
266                 }
267
268                 Key_WriteBindings (f);
269                 Cvar_WriteVariables (f);
270
271                 FS_Close (f);
272         }
273 }
274 void Host_SaveConfig(void)
275 {
276         Host_SaveConfig_to(CONFIGFILENAME);
277 }
278 void Host_SaveConfig_f(void)
279 {
280         const char *file = CONFIGFILENAME;
281
282         if(Cmd_Argc() >= 2) {
283                 file = Cmd_Argv(1);
284                 Con_Printf("Saving to %s\n", file);
285         }
286
287         Host_SaveConfig_to(file);
288 }
289
290 /*
291 ===============
292 Host_LoadConfig_f
293
294 Resets key bindings and cvars to defaults and then reloads scripts
295 ===============
296 */
297 void Host_LoadConfig_f(void)
298 {
299         // unlock the cvar default strings so they can be updated by the new default.cfg
300         Cvar_UnlockDefaults();
301         // reset cvars to their defaults, and then exec startup scripts again
302         Cbuf_InsertText("cvar_resettodefaults_all;exec " STARTCONFIGFILENAME "\n");
303 }
304
305 /*
306 =================
307 SV_ClientPrint
308
309 Sends text across to be displayed
310 FIXME: make this just a stuffed echo?
311 =================
312 */
313 void SV_ClientPrint(const char *msg)
314 {
315         if (host_client->netconnection)
316         {
317                 MSG_WriteByte(&host_client->netconnection->message, svc_print);
318                 MSG_WriteString(&host_client->netconnection->message, msg);
319         }
320 }
321
322 /*
323 =================
324 SV_ClientPrintf
325
326 Sends text across to be displayed
327 FIXME: make this just a stuffed echo?
328 =================
329 */
330 void SV_ClientPrintf(const char *fmt, ...)
331 {
332         va_list argptr;
333         char msg[MAX_INPUTLINE];
334
335         va_start(argptr,fmt);
336         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
337         va_end(argptr);
338
339         SV_ClientPrint(msg);
340 }
341
342 /*
343 =================
344 SV_BroadcastPrint
345
346 Sends text to all active clients
347 =================
348 */
349 void SV_BroadcastPrint(const char *msg)
350 {
351         int i;
352         client_t *client;
353
354         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
355         {
356                 if (client->active && client->netconnection)
357                 {
358                         MSG_WriteByte(&client->netconnection->message, svc_print);
359                         MSG_WriteString(&client->netconnection->message, msg);
360                 }
361         }
362
363         if (sv_echobprint.integer && cls.state == ca_dedicated)
364                 Con_Print(msg);
365 }
366
367 /*
368 =================
369 SV_BroadcastPrintf
370
371 Sends text to all active clients
372 =================
373 */
374 void SV_BroadcastPrintf(const char *fmt, ...)
375 {
376         va_list argptr;
377         char msg[MAX_INPUTLINE];
378
379         va_start(argptr,fmt);
380         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
381         va_end(argptr);
382
383         SV_BroadcastPrint(msg);
384 }
385
386 /*
387 =================
388 Host_ClientCommands
389
390 Send text over to the client to be executed
391 =================
392 */
393 void Host_ClientCommands(const char *fmt, ...)
394 {
395         va_list argptr;
396         char string[MAX_INPUTLINE];
397
398         if (!host_client->netconnection)
399                 return;
400
401         va_start(argptr,fmt);
402         dpvsnprintf(string, sizeof(string), fmt, argptr);
403         va_end(argptr);
404
405         MSG_WriteByte(&host_client->netconnection->message, svc_stufftext);
406         MSG_WriteString(&host_client->netconnection->message, string);
407 }
408
409 /*
410 =====================
411 SV_DropClient
412
413 Called when the player is getting totally kicked off the host
414 if (crash = true), don't bother sending signofs
415 =====================
416 */
417 void SV_DropClient(qboolean crash)
418 {
419         int i;
420         Con_Printf("Client \"%s\" dropped\n", host_client->name);
421
422         SV_StopDemoRecording(host_client);
423
424         // make sure edict is not corrupt (from a level change for example)
425         host_client->edict = PRVM_EDICT_NUM(host_client - svs.clients + 1);
426
427         if (host_client->netconnection)
428         {
429                 // free the client (the body stays around)
430                 if (!crash)
431                 {
432                         // LordHavoc: no opportunity for resending, so use unreliable 3 times
433                         unsigned char bufdata[8];
434                         sizebuf_t buf;
435                         memset(&buf, 0, sizeof(buf));
436                         buf.data = bufdata;
437                         buf.maxsize = sizeof(bufdata);
438                         MSG_WriteByte(&buf, svc_disconnect);
439                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
440                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
441                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
442                 }
443                 // break the net connection
444                 NetConn_Close(host_client->netconnection);
445                 host_client->netconnection = NULL;
446         }
447
448         // call qc ClientDisconnect function
449         // LordHavoc: don't call QC if server is dead (avoids recursive
450         // Host_Error in some mods when they run out of edicts)
451         if (host_client->clientconnectcalled && sv.active && host_client->edict)
452         {
453                 // call the prog function for removing a client
454                 // this will set the body to a dead frame, among other things
455                 int saveSelf = prog->globals.server->self;
456                 host_client->clientconnectcalled = false;
457                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
458                 PRVM_ExecuteProgram(prog->globals.server->ClientDisconnect, "QC function ClientDisconnect is missing");
459                 prog->globals.server->self = saveSelf;
460         }
461
462         // if a download is active, close it
463         if (host_client->download_file)
464         {
465                 Con_DPrintf("Download of %s aborted when %s dropped\n", host_client->download_name, host_client->name);
466                 FS_Close(host_client->download_file);
467                 host_client->download_file = NULL;
468                 host_client->download_name[0] = 0;
469                 host_client->download_expectedposition = 0;
470                 host_client->download_started = false;
471         }
472
473         // remove leaving player from scoreboard
474         host_client->name[0] = 0;
475         host_client->colors = 0;
476         host_client->frags = 0;
477         // send notification to all clients
478         // get number of client manually just to make sure we get it right...
479         i = host_client - svs.clients;
480         MSG_WriteByte (&sv.reliable_datagram, svc_updatename);
481         MSG_WriteByte (&sv.reliable_datagram, i);
482         MSG_WriteString (&sv.reliable_datagram, host_client->name);
483         MSG_WriteByte (&sv.reliable_datagram, svc_updatecolors);
484         MSG_WriteByte (&sv.reliable_datagram, i);
485         MSG_WriteByte (&sv.reliable_datagram, host_client->colors);
486         MSG_WriteByte (&sv.reliable_datagram, svc_updatefrags);
487         MSG_WriteByte (&sv.reliable_datagram, i);
488         MSG_WriteShort (&sv.reliable_datagram, host_client->frags);
489
490         // free the client now
491         if (host_client->entitydatabase)
492                 EntityFrame_FreeDatabase(host_client->entitydatabase);
493         if (host_client->entitydatabase4)
494                 EntityFrame4_FreeDatabase(host_client->entitydatabase4);
495         if (host_client->entitydatabase5)
496                 EntityFrame5_FreeDatabase(host_client->entitydatabase5);
497
498         if (sv.active)
499         {
500                 // clear a fields that matter to DP_SV_CLIENTNAME and DP_SV_CLIENTCOLORS, and also frags
501                 PRVM_ED_ClearEdict(host_client->edict);
502         }
503
504         // clear the client struct (this sets active to false)
505         memset(host_client, 0, sizeof(*host_client));
506
507         // update server listing on the master because player count changed
508         // (which the master uses for filtering empty/full servers)
509         NetConn_Heartbeat(1);
510
511         if (sv.loadgame)
512         {
513                 for (i = 0;i < svs.maxclients;i++)
514                         if (svs.clients[i].active && !svs.clients[i].spawned)
515                                 break;
516                 if (i == svs.maxclients)
517                 {
518                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
519                         sv.paused = sv.loadgame = false; // we're basically done with loading now
520                 }
521         }
522 }
523
524 /*
525 ==================
526 Host_ShutdownServer
527
528 This only happens at the end of a game, not between levels
529 ==================
530 */
531 void Host_ShutdownServer(void)
532 {
533         int i;
534
535         Con_DPrintf("Host_ShutdownServer\n");
536
537         if (!sv.active)
538                 return;
539
540         NetConn_Heartbeat(2);
541         NetConn_Heartbeat(2);
542
543 // make sure all the clients know we're disconnecting
544         SV_VM_Begin();
545         World_End(&sv.world);
546         if(prog->loaded)
547                 if(prog->funcoffsets.SV_Shutdown)
548                 {
549                         func_t s = prog->funcoffsets.SV_Shutdown;
550                         prog->funcoffsets.SV_Shutdown = 0; // prevent it from getting called again
551                         PRVM_ExecuteProgram(s,"SV_Shutdown() required");
552                 }
553         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
554                 if (host_client->active)
555                         SV_DropClient(false); // server shutdown
556         SV_VM_End();
557
558         NetConn_CloseServerPorts();
559
560         sv.active = false;
561 //
562 // clear structures
563 //
564         memset(&sv, 0, sizeof(sv));
565         memset(svs.clients, 0, svs.maxclients*sizeof(client_t));
566 }
567
568
569 //============================================================================
570
571 /*
572 ===================
573 Host_GetConsoleCommands
574
575 Add them exactly as if they had been typed at the console
576 ===================
577 */
578 void Host_GetConsoleCommands (void)
579 {
580         char *cmd;
581
582         while (1)
583         {
584                 cmd = Sys_ConsoleInput ();
585                 if (!cmd)
586                         break;
587                 Cbuf_AddText (cmd);
588         }
589 }
590
591 /*
592 ==================
593 Host_TimeReport
594
595 Returns a time report string, for example for
596 ==================
597 */
598 const char *Host_TimingReport(void)
599 {
600         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);
601 }
602
603 /*
604 ==================
605 Host_Frame
606
607 Runs all active servers
608 ==================
609 */
610 static void Host_Init(void);
611 void Host_Main(void)
612 {
613         double time1 = 0;
614         double time2 = 0;
615         double time3 = 0;
616         double cl_timer, sv_timer;
617         double clframetime, deltarealtime, oldrealtime;
618         double wait;
619         int pass1, pass2, pass3, i;
620
621         Host_Init();
622
623         cl_timer = 0;
624         sv_timer = 0;
625
626         realtime = host_starttime = Sys_DoubleTime();
627         for (;;)
628         {
629                 if (setjmp(host_abortframe))
630                 {
631                         SCR_ClearLoadingScreen(false);
632                         continue;                       // something bad happened, or the server disconnected
633                 }
634
635                 oldrealtime = realtime;
636                 realtime = Sys_DoubleTime();
637
638                 deltarealtime = realtime - oldrealtime;
639                 cl_timer += deltarealtime;
640                 sv_timer += deltarealtime;
641
642                 svs.perf_acc_realtime += deltarealtime;
643
644                 // Look for clients who have spawned
645                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
646                         if(host_client->spawned)
647                                 if(host_client->netconnection)
648                                         break;
649                 if(i == svs.maxclients)
650                 {
651                         // Nobody is looking? Then we won't do timing...
652                         // Instead, reset it to zero
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                 else if(svs.perf_acc_realtime > 5)
656                 {
657                         svs.perf_cpuload = 1 - svs.perf_acc_sleeptime / svs.perf_acc_realtime;
658                         svs.perf_lost = svs.perf_acc_lost / svs.perf_acc_realtime;
659                         if(svs.perf_acc_offset_samples > 0)
660                         {
661                                 svs.perf_offset_max = svs.perf_acc_offset_max;
662                                 svs.perf_offset_avg = svs.perf_acc_offset / svs.perf_acc_offset_samples;
663                                 svs.perf_offset_sdev = sqrt(svs.perf_acc_offset_squared / svs.perf_acc_offset_samples - svs.perf_offset_avg * svs.perf_offset_avg);
664                         }
665                         if(svs.perf_lost > 0 && developer_extra.integer)
666                                 Con_DPrintf("Server can't keep up: %s\n", Host_TimingReport());
667                         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;
668                 }
669
670                 if (slowmo.value < 0.00001 && slowmo.value != 0)
671                         Cvar_SetValue("slowmo", 0);
672                 if (host_framerate.value < 0.00001 && host_framerate.value != 0)
673                         Cvar_SetValue("host_framerate", 0);
674
675                 // keep the random time dependent, but not when playing demos/benchmarking
676                 if(!*sv_random_seed.string && !cls.demoplayback)
677                         rand();
678
679                 cl.islocalgame = NetConn_IsLocalGame();
680
681                 // get new key events
682                 Key_EventQueue_Unblock();
683                 SndSys_SendKeyEvents();
684                 Sys_SendKeyEvents();
685
686                 NetConn_UpdateSockets();
687
688                 Log_DestBuffer_Flush();
689
690                 // receive packets on each main loop iteration, as the main loop may
691                 // be undersleeping due to select() detecting a new packet
692                 if (sv.active)
693                         NetConn_ServerFrame();
694
695                 Curl_Run();
696
697                 // check for commands typed to the host
698                 Host_GetConsoleCommands();
699
700                 // when a server is running we only execute console commands on server frames
701                 // (this mainly allows frikbot .way config files to work properly by staying in sync with the server qc)
702                 // otherwise we execute them on client frames
703                 if (sv.active ? sv_timer > 0 : cl_timer > 0)
704                 {
705                         // process console commands
706 //                      R_TimeReport("preconsole");
707                         CL_VM_PreventInformationLeaks();
708                         Cbuf_Execute();
709 //                      R_TimeReport("console");
710                 }
711
712                 //Con_Printf("%6.0f %6.0f\n", cl_timer * 1000000.0, sv_timer * 1000000.0);
713
714                 // if the accumulators haven't become positive yet, wait a while
715                 if (cls.state == ca_dedicated)
716                         wait = sv_timer * -1000000.0;
717                 else if (!sv.active)
718                         wait = cl_timer * -1000000.0;
719                 else
720                         wait = max(cl_timer, sv_timer) * -1000000.0;
721
722                 if (!cls.timedemo && wait >= 1)
723                 {
724                         double time0;
725
726                         if(host_maxwait.value <= 0)
727                                 wait = min(wait, 1000000.0);
728                         else
729                                 wait = min(wait, host_maxwait.value * 1000.0);
730                         if(wait < 1)
731                                 wait = 1; // because we cast to int
732
733                         time0 = Sys_DoubleTime();
734                         if (sv_checkforpacketsduringsleep.integer && !sys_usenoclockbutbenchmark.integer)
735                                 NetConn_SleepMicroseconds((int)wait);
736                         else
737                                 Sys_Sleep((int)wait);
738                         svs.perf_acc_sleeptime += Sys_DoubleTime() - time0;
739 //                      R_TimeReport("sleep");
740                         continue;
741                 }
742
743                 R_TimeReport("---");
744
745         //-------------------
746         //
747         // server operations
748         //
749         //-------------------
750
751                 // limit the frametime steps to no more than 100ms each
752                 if (cl_timer > 0.1)
753                         cl_timer = 0.1;
754                 if (sv_timer > 0.1)
755                 {
756                         svs.perf_acc_lost += (sv_timer - 0.1);
757                         sv_timer = 0.1;
758                 }
759
760                 if (sv.active && sv_timer > 0)
761                 {
762                         // execute one or more server frames, with an upper limit on how much
763                         // execution time to spend on server frames to avoid freezing the game if
764                         // the server is overloaded, this execution time limit means the game will
765                         // slow down if the server is taking too long.
766                         int framecount, framelimit = 1;
767                         double advancetime, aborttime = 0;
768                         float offset;
769
770                         // run the world state
771                         // don't allow simulation to run too fast or too slow or logic glitches can occur
772
773                         // stop running server frames if the wall time reaches this value
774                         if (sys_ticrate.value <= 0)
775                                 advancetime = sv_timer;
776                         else if (cl.islocalgame && !sv_fixedframeratesingleplayer.integer)
777                         {
778                                 // synchronize to the client frametime, but no less than 10ms and no more than sys_ticrate
779                                 advancetime = bound(0.01, cl_timer, sys_ticrate.value);
780                                 framelimit = 10;
781                                 aborttime = realtime + 0.1;
782                         }
783                         else
784                         {
785                                 advancetime = sys_ticrate.value;
786                                 // listen servers can run multiple server frames per client frame
787                                 if (cls.state == ca_connected)
788                                 {
789                                         framelimit = 10;
790                                         aborttime = realtime + 0.1;
791                                 }
792                         }
793                         if(slowmo.value > 0 && slowmo.value < 1)
794                                 advancetime = min(advancetime, 0.1 / slowmo.value);
795                         else
796                                 advancetime = min(advancetime, 0.1);
797
798                         if(advancetime > 0)
799                         {
800                                 offset = sv_timer + (Sys_DoubleTime() - realtime);
801                                 ++svs.perf_acc_offset_samples;
802                                 svs.perf_acc_offset += offset;
803                                 svs.perf_acc_offset_squared += offset * offset;
804                                 if(svs.perf_acc_offset_max < offset)
805                                         svs.perf_acc_offset_max = offset;
806                         }
807
808                         // only advance time if not paused
809                         // the game also pauses in singleplayer when menu or console is used
810                         sv.frametime = advancetime * slowmo.value;
811                         if (host_framerate.value)
812                                 sv.frametime = host_framerate.value;
813                         if (sv.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive || cl.csqc_paused)))
814                                 sv.frametime = 0;
815
816                         // setup the VM frame
817                         SV_VM_Begin();
818
819                         for (framecount = 0;framecount < framelimit && sv_timer > 0;framecount++)
820                         {
821                                 sv_timer -= advancetime;
822
823                                 // move things around and think unless paused
824                                 if (sv.frametime)
825                                         SV_Physics();
826
827                                 // if this server frame took too long, break out of the loop
828                                 if (framelimit > 1 && Sys_DoubleTime() >= aborttime)
829                                         break;
830                         }
831                         R_TimeReport("serverphysics");
832
833                         // send all messages to the clients
834                         SV_SendClientMessages();
835                         
836                         if (sv.paused == 1 && realtime > sv.pausedstart && sv.pausedstart > 0) {
837                                 prog->globals.generic[OFS_PARM0] = realtime - sv.pausedstart;
838                                 PRVM_ExecuteProgram(prog->funcoffsets.SV_PausedTic, "QC function SV_PausedTic is missing");
839                         }
840
841                         // end the server VM frame
842                         SV_VM_End();
843
844                         // send an heartbeat if enough time has passed since the last one
845                         NetConn_Heartbeat(0);
846                         R_TimeReport("servernetwork");
847                 }
848                 else
849                 {
850                         // don't let r_speeds display jump around
851                         R_TimeReport("serverphysics");
852                         R_TimeReport("servernetwork");
853                 }
854
855         //-------------------
856         //
857         // client operations
858         //
859         //-------------------
860
861                 if (cls.state != ca_dedicated && (cl_timer > 0 || cls.timedemo || ((vid_activewindow ? cl_maxfps : cl_maxidlefps).value < 1)))
862                 {
863                         R_TimeReport("---");
864                         // decide the simulation time
865                         if (cls.capturevideo.active)
866                         {
867                                 //***
868                                 if (cls.capturevideo.realtime)
869                                         clframetime = cl.realframetime = max(cl_timer, 1.0 / cls.capturevideo.framerate);
870                                 else
871                                 {
872                                         clframetime = 1.0 / cls.capturevideo.framerate;
873                                         cl.realframetime = max(cl_timer, clframetime);
874                                 }
875                         }
876                         else if (vid_activewindow && cl_maxfps.value >= 1 && !cls.timedemo)
877                         {
878                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / cl_maxfps.value);
879                                 // when running slow, we need to sleep to keep input responsive
880                                 wait = bound(0, cl_maxfps_alwayssleep.value * 1000, 100000);
881                                 if (wait > 0)
882                                         Sys_Sleep((int)wait);
883                         }
884                         else if (!vid_activewindow && cl_maxidlefps.value >= 1 && !cls.timedemo)
885                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / cl_maxidlefps.value);
886                         else
887                                 clframetime = cl.realframetime = cl_timer;
888
889                         // apply slowmo scaling
890                         clframetime *= cl.movevars_timescale;
891                         // scale playback speed of demos by slowmo cvar
892                         if (cls.demoplayback)
893                         {
894                                 clframetime *= slowmo.value;
895                                 // if demo playback is paused, don't advance time at all
896                                 if (cls.demopaused)
897                                         clframetime = 0;
898                         }
899
900                         // host_framerate overrides all else
901                         if (host_framerate.value)
902                                 clframetime = host_framerate.value;
903
904                         if (cl.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive || cl.csqc_paused)))
905                                 clframetime = 0;
906
907                         if (cls.timedemo)
908                                 clframetime = cl.realframetime = cl_timer;
909
910                         // deduct the frame time from the accumulator
911                         cl_timer -= cl.realframetime;
912
913                         cl.oldtime = cl.time;
914                         cl.time += clframetime;
915
916                         // update video
917                         if (host_speeds.integer)
918                                 time1 = Sys_DoubleTime();
919                         R_TimeReport("pre-input");
920
921                         // Collect input into cmd
922                         CL_Input();
923
924                         R_TimeReport("input");
925
926                         // check for new packets
927                         NetConn_ClientFrame();
928
929                         // read a new frame from a demo if needed
930                         CL_ReadDemoMessage();
931                         R_TimeReport("clientnetwork");
932
933                         // now that packets have been read, send input to server
934                         CL_SendMove();
935                         R_TimeReport("sendmove");
936
937                         // update client world (interpolate entities, create trails, etc)
938                         CL_UpdateWorld();
939                         R_TimeReport("lerpworld");
940
941                         CL_Video_Frame();
942                         CL_Gecko_Frame();
943
944                         R_TimeReport("client");
945
946                         CL_UpdateScreen();
947                         R_TimeReport("render");
948
949                         if (host_speeds.integer)
950                                 time2 = Sys_DoubleTime();
951
952                         // update audio
953                         if(cl.csqc_usecsqclistener)
954                         {
955                                 S_Update(&cl.csqc_listenermatrix);
956                                 cl.csqc_usecsqclistener = false;
957                         }
958                         else
959                                 S_Update(&r_refdef.view.matrix);
960
961                         CDAudio_Update();
962                         R_TimeReport("audio");
963
964                         // reset gathering of mouse input
965                         in_mouse_x = in_mouse_y = 0;
966
967                         if (host_speeds.integer)
968                         {
969                                 pass1 = (int)((time1 - time3)*1000000);
970                                 time3 = Sys_DoubleTime();
971                                 pass2 = (int)((time2 - time1)*1000000);
972                                 pass3 = (int)((time3 - time2)*1000000);
973                                 Con_Printf("%6ius total %6ius server %6ius gfx %6ius snd\n",
974                                                         pass1+pass2+pass3, pass1, pass2, pass3);
975                         }
976                 }
977
978 #if MEMPARANOIA
979                 Mem_CheckSentinelsGlobal();
980 #else
981                 if (developer_memorydebug.integer)
982                         Mem_CheckSentinelsGlobal();
983 #endif
984
985                 // if there is some time remaining from this frame, reset the timers
986                 if (cl_timer >= 0)
987                         cl_timer = 0;
988                 if (sv_timer >= 0)
989                 {
990                         svs.perf_acc_lost += sv_timer;
991                         sv_timer = 0;
992                 }
993
994                 host_framecount++;
995         }
996 }
997
998 //============================================================================
999
1000 qboolean vid_opened = false;
1001 void Host_StartVideo(void)
1002 {
1003         if (!vid_opened && cls.state != ca_dedicated)
1004         {
1005                 vid_opened = true;
1006                 // make sure we open sockets before opening video because the Windows Firewall "unblock?" dialog can screw up the graphics context on some graphics drivers
1007                 NetConn_UpdateSockets();
1008                 VID_Start();
1009                 CDAudio_Startup();
1010         }
1011 }
1012
1013 char engineversion[128];
1014
1015 qboolean sys_nostdout = false;
1016
1017 extern void u8_Init(void);
1018 extern void Render_Init(void);
1019 extern void Mathlib_Init(void);
1020 extern void FS_Init_SelfPack(void);
1021 extern void FS_Init(void);
1022 extern void FS_Shutdown(void);
1023 extern void PR_Cmd_Init(void);
1024 extern void COM_Init_Commands(void);
1025 extern void FS_Init_Commands(void);
1026 extern qboolean host_stuffcmdsrun;
1027
1028 /*
1029 ====================
1030 Host_Init
1031 ====================
1032 */
1033 static void Host_Init (void)
1034 {
1035         int i;
1036         const char* os;
1037
1038         if (COM_CheckParm("-profilegameonly"))
1039                 Sys_AllowProfiling(false);
1040
1041         // LordHavoc: quake never seeded the random number generator before... heh
1042         if (COM_CheckParm("-benchmark"))
1043                 srand(0); // predictable random sequence for -benchmark
1044         else
1045                 srand((unsigned int)time(NULL));
1046
1047         // FIXME: this is evil, but possibly temporary
1048         // LordHavoc: doesn't seem very temporary...
1049         // LordHavoc: made this a saved cvar
1050 // COMMANDLINEOPTION: Console: -developer enables warnings and other notices (RECOMMENDED for mod developers)
1051         if (COM_CheckParm("-developer"))
1052         {
1053                 developer.value = developer.integer = 1;
1054                 developer.string = "1";
1055         }
1056
1057         if (COM_CheckParm("-developer2"))
1058         {
1059                 developer.value = developer.integer = 1;
1060                 developer.string = "1";
1061                 developer_extra.value = developer_extra.integer = 1;
1062                 developer_extra.string = "1";
1063                 developer_insane.value = developer_insane.integer = 1;
1064                 developer_insane.string = "1";
1065                 developer_memory.value = developer_memory.integer = 1;
1066                 developer_memory.string = "1";
1067                 developer_memorydebug.value = developer_memorydebug.integer = 1;
1068                 developer_memorydebug.string = "1";
1069         }
1070
1071 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
1072         if (COM_CheckParm("-nostdout"))
1073                 sys_nostdout = 1;
1074
1075         // used by everything
1076         Memory_Init();
1077
1078         // initialize console command/cvar/alias/command execution systems
1079         Cmd_Init();
1080
1081         // initialize memory subsystem cvars/commands
1082         Memory_Init_Commands();
1083
1084         // initialize console and logging and its cvars/commands
1085         Con_Init();
1086
1087         // initialize various cvars that could not be initialized earlier
1088         u8_Init();
1089         Curl_Init_Commands();
1090         Cmd_Init_Commands();
1091         Sys_Init_Commands();
1092         COM_Init_Commands();
1093         FS_Init_Commands();
1094
1095         // initialize console window (only used by sys_win.c)
1096         Sys_InitConsole();
1097
1098         // initialize the self-pack (must be before COM_InitGameType as it may add command line options)
1099         FS_Init_SelfPack();
1100
1101         // detect gamemode from commandline options or executable name
1102         COM_InitGameType();
1103
1104         // construct a version string for the corner of the console
1105         os = DP_OS_NAME;
1106         dpsnprintf (engineversion, sizeof (engineversion), "%s %s %s", gamename, os, buildstring);
1107         Con_Printf("%s\n", engineversion);
1108
1109         // initialize ixtable
1110         Mathlib_Init();
1111
1112         // initialize filesystem (including fs_basedir, fs_gamedir, -game, scr_screenshot_name)
1113         FS_Init();
1114
1115         NetConn_Init();
1116         Curl_Init();
1117         //PR_Init();
1118         //PR_Cmd_Init();
1119         PRVM_Init();
1120         Mod_Init();
1121         World_Init();
1122         SV_Init();
1123         Host_InitCommands();
1124         Host_InitLocal();
1125         Host_ServerOptions();
1126
1127         if (cls.state == ca_dedicated)
1128                 Cmd_AddCommand ("disconnect", CL_Disconnect_f, "disconnect from server (or disconnect all clients if running a server)");
1129         else
1130         {
1131                 Con_DPrintf("Initializing client\n");
1132
1133                 R_Modules_Init();
1134                 Palette_Init();
1135                 MR_Init_Commands();
1136                 VID_Shared_Init();
1137                 VID_Init();
1138                 Render_Init();
1139                 S_Init();
1140                 CDAudio_Init();
1141                 Key_Init();
1142                 V_Init();
1143                 CL_Init();
1144         }
1145
1146         // set up the default startmap_sp and startmap_dm aliases (mods can
1147         // override these) and then execute the quake.rc startup script
1148         if (gamemode == GAME_NEHAHRA)
1149                 Cbuf_AddText("alias startmap_sp \"map nehstart\"\nalias startmap_dm \"map nehstart\"\nexec " STARTCONFIGFILENAME "\n");
1150         else if (gamemode == GAME_TRANSFUSION)
1151                 Cbuf_AddText("alias startmap_sp \"map e1m1\"\n""alias startmap_dm \"map bb1\"\nexec " STARTCONFIGFILENAME "\n");
1152         else if (gamemode == GAME_TEU)
1153                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec teu.rc\n");
1154         else
1155                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec " STARTCONFIGFILENAME "\n");
1156         Cbuf_Execute();
1157
1158         // if stuffcmds wasn't run, then quake.rc is probably missing, use default
1159         if (!host_stuffcmdsrun)
1160         {
1161                 Cbuf_AddText("exec default.cfg\nexec " CONFIGFILENAME "\nexec autoexec.cfg\nstuffcmds\n");
1162                 Cbuf_Execute();
1163         }
1164
1165         // put up the loading image so the user doesn't stare at a black screen...
1166         SCR_BeginLoadingPlaque();
1167
1168         // FIXME: put this into some neat design, but the menu should be allowed to crash
1169         // without crashing the whole game, so this should just be a short-time solution
1170
1171         // here comes the not so critical stuff
1172         if (setjmp(host_abortframe)) {
1173                 return;
1174         }
1175
1176         if (cls.state != ca_dedicated)
1177         {
1178                 MR_Init();
1179         }
1180
1181         // check for special benchmark mode
1182 // 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)
1183         i = COM_CheckParm("-benchmark");
1184         if (i && i + 1 < com_argc)
1185         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1186         {
1187                 Cbuf_AddText(va("timedemo %s\n", com_argv[i + 1]));
1188                 Cbuf_Execute();
1189         }
1190
1191         // check for special demo mode
1192 // COMMANDLINEOPTION: Client: -demo <demoname> runs a playdemo and quits
1193         i = COM_CheckParm("-demo");
1194         if (i && i + 1 < com_argc)
1195         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1196         {
1197                 Cbuf_AddText(va("playdemo %s\n", com_argv[i + 1]));
1198                 Cbuf_Execute();
1199         }
1200
1201 // COMMANDLINEOPTION: Client: -capturedemo <demoname> captures a playdemo and quits
1202         i = COM_CheckParm("-capturedemo");
1203         if (i && i + 1 < com_argc)
1204         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1205         {
1206                 Cbuf_AddText(va("playdemo %s\ncl_capturevideo 1\n", com_argv[i + 1]));
1207                 Cbuf_Execute();
1208         }
1209
1210         if (cls.state == ca_dedicated || COM_CheckParm("-listen"))
1211         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1212         {
1213                 Cbuf_AddText("startmap_dm\n");
1214                 Cbuf_Execute();
1215         }
1216
1217         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1218         {
1219                 Cbuf_AddText("togglemenu\n");
1220                 Cbuf_Execute();
1221         }
1222
1223         Con_DPrint("========Initialized=========\n");
1224
1225         //Host_StartVideo();
1226 }
1227
1228
1229 /*
1230 ===============
1231 Host_Shutdown
1232
1233 FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
1234 to run quit through here before the final handoff to the sys code.
1235 ===============
1236 */
1237 void Host_Shutdown(void)
1238 {
1239         static qboolean isdown = false;
1240
1241         if (isdown)
1242         {
1243                 Con_Print("recursive shutdown\n");
1244                 return;
1245         }
1246         if (setjmp(host_abortframe))
1247         {
1248                 Con_Print("aborted the quitting frame?!?\n");
1249                 return;
1250         }
1251         isdown = true;
1252
1253         // be quiet while shutting down
1254         S_StopAllSounds();
1255
1256         // disconnect client from server if active
1257         CL_Disconnect();
1258
1259         // shut down local server if active
1260         Host_ShutdownServer ();
1261
1262         // Shutdown menu
1263         if(MR_Shutdown)
1264                 MR_Shutdown();
1265
1266         // AK shutdown PRVM
1267         // AK hmm, no PRVM_Shutdown(); yet
1268
1269         CL_Gecko_Shutdown();
1270         CL_Video_Shutdown();
1271
1272         Host_SaveConfig();
1273
1274         CDAudio_Shutdown ();
1275         S_Terminate ();
1276         Curl_Shutdown ();
1277         NetConn_Shutdown ();
1278         //PR_Shutdown ();
1279
1280         if (cls.state != ca_dedicated)
1281         {
1282                 R_Modules_Shutdown();
1283                 VID_Shutdown();
1284         }
1285
1286         Cmd_Shutdown();
1287         Key_Shutdown();
1288         CL_Shutdown();
1289         Sys_Shutdown();
1290         Log_Close();
1291         FS_Shutdown();
1292         Con_Shutdown();
1293         Memory_Shutdown();
1294 }
1295