7862e440f2b95a519a8378518b5c40c069de8421
[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 // LordHavoc: framerate upper cap
63 cvar_t cl_maxfps = {CVAR_SAVE, "cl_maxfps", "1000000", "maximum fps cap, if game is running faster than this it will wait before running another frame (useful to make cpu time available to other programs)"};
64 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"};
65
66 cvar_t developer = {0, "developer","0", "prints additional debugging messages and information (recommended for modders and level designers)"};
67 cvar_t developer_entityparsing = {0, "developer_entityparsing", "0", "prints detailed network entities information each time a packet is received"};
68
69 cvar_t timestamps = {CVAR_SAVE, "timestamps", "0", "prints timestamps on console messages"};
70 cvar_t timeformat = {CVAR_SAVE, "timeformat", "[%Y-%m-%d %H:%M:%S] ", "time format to use on timestamped console messages"};
71
72 /*
73 ================
74 Host_AbortCurrentFrame
75
76 aborts the current host frame and goes on with the next one
77 ================
78 */
79 void Host_AbortCurrentFrame(void)
80 {
81         longjmp (host_abortframe, 1);
82 }
83
84 /*
85 ================
86 Host_Error
87
88 This shuts down both the client and server
89 ================
90 */
91 void Host_Error (const char *error, ...)
92 {
93         static char hosterrorstring1[MAX_INPUTLINE];
94         static char hosterrorstring2[MAX_INPUTLINE];
95         static qboolean hosterror = false;
96         va_list argptr;
97
98         // turn off rcon redirect if it was active when the crash occurred
99         rcon_redirect = false;
100
101         va_start (argptr,error);
102         dpvsnprintf (hosterrorstring1,sizeof(hosterrorstring1),error,argptr);
103         va_end (argptr);
104
105         Con_Printf("Host_Error: %s\n", hosterrorstring1);
106
107         // LordHavoc: if crashing very early, or currently shutting down, do
108         // Sys_Error instead
109         if (host_framecount < 3 || host_shuttingdown)
110                 Sys_Error ("Host_Error: %s", hosterrorstring1);
111
112         if (hosterror)
113                 Sys_Error ("Host_Error: recursively entered (original error was: %s    new error is: %s)", hosterrorstring2, hosterrorstring1);
114         hosterror = true;
115
116         strlcpy(hosterrorstring2, hosterrorstring1, sizeof(hosterrorstring2));
117
118         CL_Parse_DumpPacket();
119
120         CL_Parse_ErrorCleanUp();
121
122         //PR_Crash();
123
124         // print out where the crash happened, if it was caused by QC (and do a cleanup)
125         PRVM_Crash();
126
127
128         Host_ShutdownServer ();
129
130         if (cls.state == ca_dedicated)
131                 Sys_Error ("Host_Error: %s",hosterrorstring2);  // dedicated servers exit
132
133         CL_Disconnect ();
134         cls.demonum = -1;
135
136         hosterror = false;
137
138         Host_AbortCurrentFrame();
139 }
140
141 void Host_ServerOptions (void)
142 {
143         int i;
144
145         // general default
146         svs.maxclients = 8;
147
148 // COMMANDLINEOPTION: Server: -dedicated [playerlimit] starts a dedicated server (with a command console), default playerlimit is 8
149 // COMMANDLINEOPTION: Server: -listen [playerlimit] starts a multiplayer server with graphical client, like singleplayer but other players can connect, default playerlimit is 8
150         // if no client is in the executable or -dedicated is specified on
151         // commandline, start a dedicated server
152         i = COM_CheckParm ("-dedicated");
153         if (i || !cl_available)
154         {
155                 cls.state = ca_dedicated;
156                 // check for -dedicated specifying how many players
157                 if (i && i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
158                         svs.maxclients = atoi (com_argv[i+1]);
159                 if (COM_CheckParm ("-listen"))
160                         Con_Printf ("Only one of -dedicated or -listen can be specified\n");
161                 // default sv_public on for dedicated servers (often hosted by serious administrators), off for listen servers (often hosted by clueless users)
162                 Cvar_SetValue("sv_public", 1);
163         }
164         else if (cl_available)
165         {
166                 // client exists and not dedicated, check if -listen is specified
167                 cls.state = ca_disconnected;
168                 i = COM_CheckParm ("-listen");
169                 if (i)
170                 {
171                         // default players unless specified
172                         if (i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
173                                 svs.maxclients = atoi (com_argv[i+1]);
174                 }
175                 else
176                 {
177                         // default players in some games, singleplayer in most
178                         if (gamemode != GAME_GOODVSBAD2 && gamemode != GAME_NEXUIZ && gamemode != GAME_BATTLEMECH)
179                                 svs.maxclients = 1;
180                 }
181         }
182
183         svs.maxclients = bound(1, svs.maxclients, MAX_SCOREBOARD);
184
185         svs.clients = (client_t *)Mem_Alloc(sv_mempool, sizeof(client_t) * svs.maxclients);
186
187         if (svs.maxclients > 1 && !deathmatch.integer && !coop.integer)
188                 Cvar_SetValueQuick(&deathmatch, 1);
189 }
190
191 /*
192 =======================
193 Host_InitLocal
194 ======================
195 */
196 void Host_SaveConfig_f(void);
197 void Host_LoadConfig_f(void);
198 static void Host_InitLocal (void)
199 {
200         Cmd_AddCommand("saveconfig", Host_SaveConfig_f, "save settings to config.cfg (or a specified filename) immediately (also automatic when quitting)");
201         Cmd_AddCommand("loadconfig", Host_LoadConfig_f, "reset everything and reload configs");
202
203         Cvar_RegisterVariable (&host_framerate);
204         Cvar_RegisterVariable (&host_speeds);
205         Cvar_RegisterVariable (&cl_maxfps);
206         Cvar_RegisterVariable (&cl_maxidlefps);
207
208         Cvar_RegisterVariable (&developer);
209         Cvar_RegisterVariable (&developer_entityparsing);
210
211         Cvar_RegisterVariable (&timestamps);
212         Cvar_RegisterVariable (&timeformat);
213 }
214
215
216 /*
217 ===============
218 Host_SaveConfig_f
219
220 Writes key bindings and archived cvars to config.cfg
221 ===============
222 */
223 void Host_SaveConfig_to(const char *file)
224 {
225         qfile_t *f;
226
227 // dedicated servers initialize the host but don't parse and set the
228 // config.cfg cvars
229         // LordHavoc: don't save a config if it crashed in startup
230         if (host_framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
231         {
232                 f = FS_Open (file, "wb", false, false);
233                 if (!f)
234                 {
235                         Con_Printf("Couldn't write %s.\n", file);
236                         return;
237                 }
238
239                 Key_WriteBindings (f);
240                 Cvar_WriteVariables (f);
241
242                 FS_Close (f);
243         }
244 }
245 void Host_SaveConfig(void)
246 {
247         Host_SaveConfig_to("config.cfg");
248 }
249 void Host_SaveConfig_f(void)
250 {
251         const char *file = "config.cfg";
252
253         if(Cmd_Argc() >= 2) {
254                 file = Cmd_Argv(1);
255                 Con_Printf("Saving to %s\n", file);
256         }
257
258         Host_SaveConfig_to(file);
259 }
260
261 /*
262 ===============
263 Host_LoadConfig_f
264
265 Resets key bindings and cvars to defaults and then reloads scripts
266 ===============
267 */
268 void Host_LoadConfig_f(void)
269 {
270         // unlock the cvar default strings so they can be updated by the new default.cfg
271         Cvar_UnlockDefaults();
272         // reset cvars to their defaults, and then exec startup scripts again
273         Cbuf_InsertText("cvar_resettodefaults_all;exec quake.rc\n");
274 }
275
276 /*
277 =================
278 SV_ClientPrint
279
280 Sends text across to be displayed
281 FIXME: make this just a stuffed echo?
282 =================
283 */
284 void SV_ClientPrint(const char *msg)
285 {
286         if (host_client->netconnection)
287         {
288                 MSG_WriteByte(&host_client->netconnection->message, svc_print);
289                 MSG_WriteString(&host_client->netconnection->message, msg);
290         }
291 }
292
293 /*
294 =================
295 SV_ClientPrintf
296
297 Sends text across to be displayed
298 FIXME: make this just a stuffed echo?
299 =================
300 */
301 void SV_ClientPrintf(const char *fmt, ...)
302 {
303         va_list argptr;
304         char msg[MAX_INPUTLINE];
305
306         va_start(argptr,fmt);
307         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
308         va_end(argptr);
309
310         SV_ClientPrint(msg);
311 }
312
313 /*
314 =================
315 SV_BroadcastPrint
316
317 Sends text to all active clients
318 =================
319 */
320 void SV_BroadcastPrint(const char *msg)
321 {
322         int i;
323         client_t *client;
324
325         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
326         {
327                 if (client->active && client->netconnection)
328                 {
329                         MSG_WriteByte(&client->netconnection->message, svc_print);
330                         MSG_WriteString(&client->netconnection->message, msg);
331                 }
332         }
333
334         if (sv_echobprint.integer && cls.state == ca_dedicated)
335                 Con_Print(msg);
336 }
337
338 /*
339 =================
340 SV_BroadcastPrintf
341
342 Sends text to all active clients
343 =================
344 */
345 void SV_BroadcastPrintf(const char *fmt, ...)
346 {
347         va_list argptr;
348         char msg[MAX_INPUTLINE];
349
350         va_start(argptr,fmt);
351         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
352         va_end(argptr);
353
354         SV_BroadcastPrint(msg);
355 }
356
357 /*
358 =================
359 Host_ClientCommands
360
361 Send text over to the client to be executed
362 =================
363 */
364 void Host_ClientCommands(const char *fmt, ...)
365 {
366         va_list argptr;
367         char string[MAX_INPUTLINE];
368
369         if (!host_client->netconnection)
370                 return;
371
372         va_start(argptr,fmt);
373         dpvsnprintf(string, sizeof(string), fmt, argptr);
374         va_end(argptr);
375
376         MSG_WriteByte(&host_client->netconnection->message, svc_stufftext);
377         MSG_WriteString(&host_client->netconnection->message, string);
378 }
379
380 /*
381 =====================
382 SV_DropClient
383
384 Called when the player is getting totally kicked off the host
385 if (crash = true), don't bother sending signofs
386 =====================
387 */
388 void SV_DropClient(qboolean crash)
389 {
390         int i;
391         Con_Printf("Client \"%s\" dropped\n", host_client->name);
392
393         SV_StopDemoRecording(host_client);
394
395         // make sure edict is not corrupt (from a level change for example)
396         host_client->edict = PRVM_EDICT_NUM(host_client - svs.clients + 1);
397
398         if (host_client->netconnection)
399         {
400                 // free the client (the body stays around)
401                 if (!crash)
402                 {
403                         // LordHavoc: no opportunity for resending, so use unreliable 3 times
404                         unsigned char bufdata[8];
405                         sizebuf_t buf;
406                         memset(&buf, 0, sizeof(buf));
407                         buf.data = bufdata;
408                         buf.maxsize = sizeof(bufdata);
409                         MSG_WriteByte(&buf, svc_disconnect);
410                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
411                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
412                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
413                 }
414                 // break the net connection
415                 NetConn_Close(host_client->netconnection);
416                 host_client->netconnection = NULL;
417         }
418
419         // call qc ClientDisconnect function
420         // LordHavoc: don't call QC if server is dead (avoids recursive
421         // Host_Error in some mods when they run out of edicts)
422         if (host_client->clientconnectcalled && sv.active && host_client->edict)
423         {
424                 // call the prog function for removing a client
425                 // this will set the body to a dead frame, among other things
426                 int saveSelf = prog->globals.server->self;
427                 host_client->clientconnectcalled = false;
428                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
429                 PRVM_ExecuteProgram(prog->globals.server->ClientDisconnect, "QC function ClientDisconnect is missing");
430                 prog->globals.server->self = saveSelf;
431         }
432
433         // if a download is active, close it
434         if (host_client->download_file)
435         {
436                 Con_DPrintf("Download of %s aborted when %s dropped\n", host_client->download_name, host_client->name);
437                 FS_Close(host_client->download_file);
438                 host_client->download_file = NULL;
439                 host_client->download_name[0] = 0;
440                 host_client->download_expectedposition = 0;
441                 host_client->download_started = false;
442         }
443
444         // remove leaving player from scoreboard
445         host_client->name[0] = 0;
446         host_client->colors = 0;
447         host_client->frags = 0;
448         // send notification to all clients
449         // get number of client manually just to make sure we get it right...
450         i = host_client - svs.clients;
451         MSG_WriteByte (&sv.reliable_datagram, svc_updatename);
452         MSG_WriteByte (&sv.reliable_datagram, i);
453         MSG_WriteString (&sv.reliable_datagram, host_client->name);
454         MSG_WriteByte (&sv.reliable_datagram, svc_updatecolors);
455         MSG_WriteByte (&sv.reliable_datagram, i);
456         MSG_WriteByte (&sv.reliable_datagram, host_client->colors);
457         MSG_WriteByte (&sv.reliable_datagram, svc_updatefrags);
458         MSG_WriteByte (&sv.reliable_datagram, i);
459         MSG_WriteShort (&sv.reliable_datagram, host_client->frags);
460
461         // free the client now
462         if (host_client->entitydatabase)
463                 EntityFrame_FreeDatabase(host_client->entitydatabase);
464         if (host_client->entitydatabase4)
465                 EntityFrame4_FreeDatabase(host_client->entitydatabase4);
466         if (host_client->entitydatabase5)
467                 EntityFrame5_FreeDatabase(host_client->entitydatabase5);
468
469         if (sv.active)
470         {
471                 // clear a fields that matter to DP_SV_CLIENTNAME and DP_SV_CLIENTCOLORS, and also frags
472                 PRVM_ED_ClearEdict(host_client->edict);
473         }
474
475         // clear the client struct (this sets active to false)
476         memset(host_client, 0, sizeof(*host_client));
477
478         // update server listing on the master because player count changed
479         // (which the master uses for filtering empty/full servers)
480         NetConn_Heartbeat(1);
481
482         if (sv.loadgame)
483         {
484                 for (i = 0;i < svs.maxclients;i++)
485                         if (svs.clients[i].active && !svs.clients[i].spawned)
486                                 break;
487                 if (i == svs.maxclients)
488                 {
489                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
490                         sv.paused = sv.loadgame = false; // we're basically done with loading now
491                 }
492         }
493 }
494
495 /*
496 ==================
497 Host_ShutdownServer
498
499 This only happens at the end of a game, not between levels
500 ==================
501 */
502 void Host_ShutdownServer(void)
503 {
504         int i;
505
506         Con_DPrintf("Host_ShutdownServer\n");
507
508         if (!sv.active)
509                 return;
510
511         NetConn_Heartbeat(2);
512         NetConn_Heartbeat(2);
513
514 // make sure all the clients know we're disconnecting
515         SV_VM_Begin();
516         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
517                 if (host_client->active)
518                         SV_DropClient(false); // server shutdown
519         if(prog->loaded)
520                 if(prog->funcoffsets.SV_Shutdown)
521                 {
522                         func_t s = prog->funcoffsets.SV_Shutdown;
523                         prog->funcoffsets.SV_Shutdown = 0; // prevent it from getting called again
524                         PRVM_ExecuteProgram(s,"SV_Shutdown() required");
525                 }
526         SV_VM_End();
527
528         NetConn_CloseServerPorts();
529
530         sv.active = false;
531 //
532 // clear structures
533 //
534         memset(&sv, 0, sizeof(sv));
535         memset(svs.clients, 0, svs.maxclients*sizeof(client_t));
536 }
537
538
539 //============================================================================
540
541 /*
542 ===================
543 Host_GetConsoleCommands
544
545 Add them exactly as if they had been typed at the console
546 ===================
547 */
548 void Host_GetConsoleCommands (void)
549 {
550         char *cmd;
551
552         while (1)
553         {
554                 cmd = Sys_ConsoleInput ();
555                 if (!cmd)
556                         break;
557                 Cbuf_AddText (cmd);
558         }
559 }
560
561 /*
562 ==================
563 Host_TimeReport
564
565 Returns a time report string, for example for
566 ==================
567 */
568 const char *Host_TimingReport()
569 {
570         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);
571 }
572
573 /*
574 ==================
575 Host_Frame
576
577 Runs all active servers
578 ==================
579 */
580 static void Host_Init(void);
581 void Host_Main(void)
582 {
583         double time1 = 0;
584         double time2 = 0;
585         double time3 = 0;
586         double cl_timer, sv_timer;
587         double clframetime, deltarealtime, oldrealtime;
588         double wait;
589         int pass1, pass2, pass3, i;
590
591         Host_Init();
592
593         cl_timer = 0;
594         sv_timer = 0;
595
596         realtime = Sys_DoubleTime();
597         for (;;)
598         {
599                 if (setjmp(host_abortframe))
600                         continue;                       // something bad happened, or the server disconnected
601
602                 oldrealtime = realtime;
603                 realtime = Sys_DoubleTime();
604
605                 deltarealtime = realtime - oldrealtime;
606                 cl_timer += deltarealtime;
607                 sv_timer += deltarealtime;
608
609                 svs.perf_acc_realtime += deltarealtime;
610
611                 // Look for clients who have spawned
612                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
613                         if(host_client->spawned)
614                                 if(host_client->netconnection)
615                                         break;
616                 if(i == svs.maxclients)
617                 {
618                         // Nobody is looking? Then we won't do timing...
619                         // Instead, reset it to zero
620                         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;
621                 }
622                 else if(svs.perf_acc_realtime > 5)
623                 {
624                         svs.perf_cpuload = 1 - svs.perf_acc_sleeptime / svs.perf_acc_realtime;
625                         svs.perf_lost = svs.perf_acc_lost / svs.perf_acc_realtime;
626                         if(svs.perf_acc_offset_samples > 0)
627                         {
628                                 svs.perf_offset_max = svs.perf_acc_offset_max;
629                                 svs.perf_offset_avg = svs.perf_acc_offset / svs.perf_acc_offset_samples;
630                                 svs.perf_offset_sdev = sqrt(svs.perf_acc_offset_squared / svs.perf_acc_offset_samples - svs.perf_offset_avg * svs.perf_offset_avg);
631                         }
632                         if(svs.perf_lost > 0)
633                                 Con_DPrintf("Server can't keep up: %s\n", Host_TimingReport());
634                         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;
635                 }
636
637                 if (slowmo.value < 0.00001 && slowmo.value != 0)
638                         Cvar_SetValue("slowmo", 0);
639                 if (host_framerate.value < 0.00001 && host_framerate.value != 0)
640                         Cvar_SetValue("host_framerate", 0);
641
642                 // keep the random time dependent, but not when playing demos/benchmarking
643                 if(!*sv_random_seed.string && !cls.demoplayback)
644                         rand();
645
646                 cl.islocalgame = NetConn_IsLocalGame();
647
648                 // get new key events
649                 Sys_SendKeyEvents();
650
651                 NetConn_UpdateSockets();
652
653                 Log_DestBuffer_Flush();
654
655                 // receive packets on each main loop iteration, as the main loop may
656                 // be undersleeping due to select() detecting a new packet
657                 if (sv.active)
658                         NetConn_ServerFrame();
659
660                 Curl_Run();
661
662                 // check for commands typed to the host
663                 Host_GetConsoleCommands();
664
665                 // when a server is running we only execute console commands on server frames
666                 // (this mainly allows frikbot .way config files to work properly by staying in sync with the server qc)
667                 // otherwise we execute them on all frames
668                 if (sv_timer > 0 || !sv.active)
669                 {
670                         // process console commands
671                         Cbuf_Execute();
672                 }
673
674                 //Con_Printf("%6.0f %6.0f\n", cl_timer * 1000000.0, sv_timer * 1000000.0);
675
676                 // if the accumulators haven't become positive yet, wait a while
677                 if (cls.state == ca_dedicated)
678                         wait = sv_timer * -1000000.0;
679                 else if (!sv.active)
680                         wait = cl_timer * -1000000.0;
681                 else
682                         wait = max(cl_timer, sv_timer) * -1000000.0;
683                 if (wait > 100000)
684                         wait = 100000;
685
686                 if (!cls.timedemo && wait > 0)
687                 {
688                         double time0 = Sys_DoubleTime();
689                         if (sv_checkforpacketsduringsleep.integer)
690                         {
691                                 if (wait >= 1)
692                                         NetConn_SleepMicroseconds((int)wait);
693                         }
694                         else
695                         {
696                                 if (wait >= 1000)
697                                         Sys_Sleep((int)wait / 1000);
698                         }
699                         svs.perf_acc_sleeptime += Sys_DoubleTime() - time0;
700                         continue;
701                 }
702
703         //-------------------
704         //
705         // server operations
706         //
707         //-------------------
708
709                 // limit the frametime steps to no more than 100ms each
710                 if (cl_timer > 0.1)
711                         cl_timer = 0.1;
712                 if (sv_timer > 0.1)
713                 {
714                         svs.perf_acc_lost += (sv_timer - 0.1);
715                         sv_timer = 0.1;
716                 }
717
718                 if (sv.active && sv_timer > 0)
719                 {
720                         // execute one or more server frames, with an upper limit on how much
721                         // execution time to spend on server frames to avoid freezing the game if
722                         // the server is overloaded, this execution time limit means the game will
723                         // slow down if the server is taking too long.
724                         int framecount, framelimit = 1;
725                         double advancetime, aborttime = 0;
726                         float offset;
727
728                         // run the world state
729                         // don't allow simulation to run too fast or too slow or logic glitches can occur
730
731                         // stop running server frames if the wall time reaches this value
732                         if (sys_ticrate.value <= 0)
733                                 advancetime = sv_timer;
734                         else if (cl.islocalgame && !sv_fixedframeratesingleplayer.integer)
735                         {
736                                 // synchronize to the client frametime, but no less than 10ms and no more than sys_ticrate
737                                 advancetime = bound(0.01, cl_timer, sys_ticrate.value);
738                                 framelimit = 10;
739                                 aborttime = realtime + 0.1;
740                         }
741                         else
742                         {
743                                 advancetime = sys_ticrate.value;
744                                 // listen servers can run multiple server frames per client frame
745                                 if (cls.state == ca_connected)
746                                 {
747                                         framelimit = 10;
748                                         aborttime = realtime + 0.1;
749                                 }
750                         }
751                         advancetime = min(advancetime, 0.1);
752
753                         if(advancetime > 0)
754                         {
755                                 offset = sv_timer + (Sys_DoubleTime() - realtime);
756                                 ++svs.perf_acc_offset_samples;
757                                 svs.perf_acc_offset += offset;
758                                 svs.perf_acc_offset_squared += offset * offset;
759                                 if(svs.perf_acc_offset_max < offset)
760                                         svs.perf_acc_offset_max = offset;
761                         }
762
763                         // only advance time if not paused
764                         // the game also pauses in singleplayer when menu or console is used
765                         sv.frametime = advancetime * slowmo.value;
766                         if (host_framerate.value)
767                                 sv.frametime = host_framerate.value;
768                         if (sv.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive)))
769                                 sv.frametime = 0;
770
771                         // setup the VM frame
772                         SV_VM_Begin();
773
774                         for (framecount = 0;framecount < framelimit && sv_timer > 0;framecount++)
775                         {
776                                 sv_timer -= advancetime;
777
778                                 // move things around and think unless paused
779                                 if (sv.frametime)
780                                         SV_Physics();
781
782                                 // if this server frame took too long, break out of the loop
783                                 if (framelimit > 1 && Sys_DoubleTime() >= aborttime)
784                                         break;
785                         }
786
787                         // send all messages to the clients
788                         SV_SendClientMessages();
789
790                         // end the server VM frame
791                         SV_VM_End();
792
793                         // send an heartbeat if enough time has passed since the last one
794                         NetConn_Heartbeat(0);
795                 }
796
797         //-------------------
798         //
799         // client operations
800         //
801         //-------------------
802
803                 if (cls.state != ca_dedicated && (cl_timer > 0 || cls.timedemo))
804                 {
805                         // decide the simulation time
806                         if (cls.capturevideo.active)
807                         {
808                                 if (cls.capturevideo.realtime)
809                                         clframetime = cl.realframetime = max(cl_timer, 1.0 / cls.capturevideo.framerate);
810                                 else
811                                 {
812                                         clframetime = 1.0 / cls.capturevideo.framerate;
813                                         cl.realframetime = max(cl_timer, clframetime);
814                                 }
815                         }
816                         else if (vid_activewindow)
817                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxfps.value));
818                         else
819                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxidlefps.value));
820
821                         // apply slowmo scaling
822                         clframetime *= cl.movevars_timescale;
823                         // scale playback speed of demos by slowmo cvar
824                         if (cls.demoplayback)
825                         {
826                                 clframetime *= slowmo.value;
827                                 // if demo playback is paused, don't advance time at all
828                                 if (cls.demopaused)
829                                         clframetime = 0;
830                         }
831
832                         // host_framerate overrides all else
833                         if (host_framerate.value)
834                                 clframetime = host_framerate.value;
835
836                         if (cls.timedemo)
837                                 clframetime = cl.realframetime = cl_timer;
838
839                         // deduct the frame time from the accumulator
840                         cl_timer -= cl.realframetime;
841
842                         cl.oldtime = cl.time;
843                         cl.time += clframetime;
844
845                         // Collect input into cmd
846                         CL_Input();
847
848                         // check for new packets
849                         NetConn_ClientFrame();
850
851                         // read a new frame from a demo if needed
852                         CL_ReadDemoMessage();
853
854                         // now that packets have been read, send input to server
855                         CL_SendMove();
856
857                         // update client world (interpolate entities, create trails, etc)
858                         CL_UpdateWorld();
859
860                         // update video
861                         if (host_speeds.integer)
862                                 time1 = Sys_DoubleTime();
863
864                         //ui_update();
865
866                         CL_Video_Frame();
867                         CL_Gecko_Frame();
868
869                         CL_UpdateScreen();
870
871                         if (host_speeds.integer)
872                                 time2 = Sys_DoubleTime();
873
874                         // update audio
875                         if(cl.csqc_usecsqclistener)
876                         {
877                                 S_Update(&cl.csqc_listenermatrix);
878                                 cl.csqc_usecsqclistener = false;
879                         }
880                         else
881                                 S_Update(&r_refdef.view.matrix);
882
883                         CDAudio_Update();
884
885                         if (host_speeds.integer)
886                         {
887                                 pass1 = (int)((time1 - time3)*1000000);
888                                 time3 = Sys_DoubleTime();
889                                 pass2 = (int)((time2 - time1)*1000000);
890                                 pass3 = (int)((time3 - time2)*1000000);
891                                 Con_Printf("%6ius total %6ius server %6ius gfx %6ius snd\n",
892                                                         pass1+pass2+pass3, pass1, pass2, pass3);
893                         }
894                 }
895
896                 // if there is some time remaining from this frame, reset the timers
897                 if (cl_timer >= 0)
898                         cl_timer = 0;
899                 if (sv_timer >= 0)
900                 {
901                         svs.perf_acc_lost += sv_timer;
902                         sv_timer = 0;
903                 }
904
905                 host_framecount++;
906         }
907 }
908
909 //============================================================================
910
911 qboolean vid_opened = false;
912 void Host_StartVideo(void)
913 {
914         if (!vid_opened && cls.state != ca_dedicated)
915         {
916                 vid_opened = true;
917                 VID_Start();
918                 CDAudio_Startup();
919         }
920 }
921
922 char engineversion[128];
923
924 qboolean sys_nostdout = false;
925
926 extern void Render_Init(void);
927 extern void Mathlib_Init(void);
928 extern void FS_Init(void);
929 extern void FS_Shutdown(void);
930 extern void PR_Cmd_Init(void);
931 extern void COM_Init_Commands(void);
932 extern void FS_Init_Commands(void);
933 extern qboolean host_stuffcmdsrun;
934
935 /*
936 ====================
937 Host_Init
938 ====================
939 */
940 static void Host_Init (void)
941 {
942         int i;
943         const char* os;
944
945         if (COM_CheckParm("-profilegameonly"))
946                 Sys_AllowProfiling(false);
947
948         // LordHavoc: quake never seeded the random number generator before... heh
949         if (COM_CheckParm("-benchmark"))
950                 srand(0); // predictable random sequence for -benchmark
951         else
952                 srand(time(NULL));
953
954         // FIXME: this is evil, but possibly temporary
955 // COMMANDLINEOPTION: Console: -developer enables warnings and other notices (RECOMMENDED for mod developers)
956         if (COM_CheckParm("-developer"))
957         {
958                 developer.value = developer.integer = 100;
959                 developer.string = "100";
960         }
961
962         if (COM_CheckParm("-developer2"))
963         {
964                 developer.value = developer.integer = 100;
965                 developer.string = "100";
966                 developer_memory.value = developer_memory.integer = 100;
967                 developer.string = "100";
968                 developer_memorydebug.value = developer_memorydebug.integer = 100;
969                 developer_memorydebug.string = "100";
970         }
971
972 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
973         if (COM_CheckParm("-nostdout"))
974                 sys_nostdout = 1;
975
976         // used by everything
977         Memory_Init();
978
979         // initialize console command/cvar/alias/command execution systems
980         Cmd_Init();
981
982         // initialize memory subsystem cvars/commands
983         Memory_Init_Commands();
984
985         // initialize console and logging and its cvars/commands
986         Con_Init();
987
988         // initialize various cvars that could not be initialized earlier
989         Curl_Init_Commands();
990         Cmd_Init_Commands();
991         Sys_Init_Commands();
992         COM_Init_Commands();
993         FS_Init_Commands();
994
995         // initialize console window (only used by sys_win.c)
996         Sys_InitConsole();
997
998         // detect gamemode from commandline options or executable name
999         COM_InitGameType();
1000
1001         // construct a version string for the corner of the console
1002         os = DP_OS_NAME;
1003         dpsnprintf (engineversion, sizeof (engineversion), "%s %s %s", gamename, os, buildstring);
1004         Con_Printf("%s\n", engineversion);
1005
1006         // initialize ixtable
1007         Mathlib_Init();
1008
1009         // initialize filesystem (including fs_basedir, fs_gamedir, -game, scr_screenshot_name)
1010         FS_Init();
1011
1012         NetConn_Init();
1013         Curl_Init();
1014         //PR_Init();
1015         //PR_Cmd_Init();
1016         PRVM_Init();
1017         Mod_Init();
1018         World_Init();
1019         SV_Init();
1020         Host_InitCommands();
1021         Host_InitLocal();
1022         Host_ServerOptions();
1023
1024         if (cls.state != ca_dedicated)
1025         {
1026                 Con_Printf("Initializing client\n");
1027
1028                 R_Modules_Init();
1029                 Palette_Init();
1030                 MR_Init_Commands();
1031                 VID_Shared_Init();
1032                 VID_Init();
1033                 Render_Init();
1034                 S_Init();
1035                 CDAudio_Init();
1036                 Key_Init();
1037                 V_Init();
1038                 CL_Init();
1039         }
1040
1041         // set up the default startmap_sp and startmap_dm aliases (mods can
1042         // override these) and then execute the quake.rc startup script
1043         if (gamemode == GAME_NEHAHRA)
1044                 Cbuf_AddText("alias startmap_sp \"map nehstart\"\nalias startmap_dm \"map nehstart\"\nexec quake.rc\n");
1045         else if (gamemode == GAME_TRANSFUSION)
1046                 Cbuf_AddText("alias startmap_sp \"map e1m1\"\n""alias startmap_dm \"map bb1\"\nexec quake.rc\n");
1047         else if (gamemode == GAME_TEU)
1048                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec teu.rc\n");
1049         else
1050                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec quake.rc\n");
1051         Cbuf_Execute();
1052
1053         // if stuffcmds wasn't run, then quake.rc is probably missing, use default
1054         if (!host_stuffcmdsrun)
1055         {
1056                 Cbuf_AddText("exec default.cfg\nexec config.cfg\nexec autoexec.cfg\nstuffcmds\n");
1057                 Cbuf_Execute();
1058         }
1059
1060         // put up the loading image so the user doesn't stare at a black screen...
1061         SCR_BeginLoadingPlaque();
1062
1063         // FIXME: put this into some neat design, but the menu should be allowed to crash
1064         // without crashing the whole game, so this should just be a short-time solution
1065
1066         // here comes the not so critical stuff
1067         if (setjmp(host_abortframe)) {
1068                 return;
1069         }
1070
1071         if (cls.state != ca_dedicated)
1072         {
1073                 MR_Init();
1074         }
1075
1076         // check for special benchmark mode
1077 // 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)
1078         i = COM_CheckParm("-benchmark");
1079         if (i && i + 1 < com_argc)
1080         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1081         {
1082                 Cbuf_AddText(va("timedemo %s\n", com_argv[i + 1]));
1083                 Cbuf_Execute();
1084         }
1085
1086         // check for special demo mode
1087 // COMMANDLINEOPTION: Client: -demo <demoname> runs a playdemo and quits
1088         i = COM_CheckParm("-demo");
1089         if (i && i + 1 < com_argc)
1090         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1091         {
1092                 Cbuf_AddText(va("playdemo %s\n", com_argv[i + 1]));
1093                 Cbuf_Execute();
1094         }
1095
1096 // COMMANDLINEOPTION: Client: -capturedemo <demoname> captures a playdemo and quits
1097         i = COM_CheckParm("-capturedemo");
1098         if (i && i + 1 < com_argc)
1099         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1100         {
1101                 Cbuf_AddText(va("playdemo %s\ncl_capturevideo 1\n", com_argv[i + 1]));
1102                 Cbuf_Execute();
1103         }
1104
1105         if (cls.state == ca_dedicated || COM_CheckParm("-listen"))
1106         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1107         {
1108                 Cbuf_AddText("startmap_dm\n");
1109                 Cbuf_Execute();
1110         }
1111
1112         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1113         {
1114                 Cbuf_AddText("togglemenu\n");
1115                 Cbuf_Execute();
1116         }
1117
1118         Con_DPrint("========Initialized=========\n");
1119
1120         //Host_StartVideo();
1121 }
1122
1123
1124 /*
1125 ===============
1126 Host_Shutdown
1127
1128 FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
1129 to run quit through here before the final handoff to the sys code.
1130 ===============
1131 */
1132 void Host_Shutdown(void)
1133 {
1134         static qboolean isdown = false;
1135
1136         if (isdown)
1137         {
1138                 Con_Print("recursive shutdown\n");
1139                 return;
1140         }
1141         if (setjmp(host_abortframe))
1142         {
1143                 Con_Print("aborted the quitting frame?!?\n");
1144                 return;
1145         }
1146         isdown = true;
1147
1148         // be quiet while shutting down
1149         S_StopAllSounds();
1150
1151         // disconnect client from server if active
1152         CL_Disconnect();
1153
1154         // shut down local server if active
1155         Host_ShutdownServer ();
1156
1157         // Shutdown menu
1158         if(MR_Shutdown)
1159                 MR_Shutdown();
1160
1161         // AK shutdown PRVM
1162         // AK hmm, no PRVM_Shutdown(); yet
1163
1164         CL_Gecko_Shutdown();
1165         CL_Video_Shutdown();
1166
1167         Host_SaveConfig();
1168
1169         CDAudio_Shutdown ();
1170         S_Terminate ();
1171         Curl_Shutdown ();
1172         NetConn_Shutdown ();
1173         //PR_Shutdown ();
1174
1175         if (cls.state != ca_dedicated)
1176         {
1177                 R_Modules_Shutdown();
1178                 VID_Shutdown();
1179         }
1180
1181         Cmd_Shutdown();
1182         CL_Shutdown();
1183         Sys_Shutdown();
1184         Log_Close();
1185         FS_Shutdown();
1186         Memory_Shutdown();
1187 }
1188