host.c

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