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