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", "1000000", "maximum fps cap, if game is running faster than this it will wait before running another frame (useful to make cpu time available to other programs)"};
  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 cvar_t cl_alwayssleep = {CVAR_SAVE, "cl_alwayssleep", "0", "calls operating system Sleep function at the end of each frame with 0 milliseconds, even if not hitting framerate cap - can make gameplay smoother"};
  71
  72 cvar_t developer = {0, "developer","0", "prints additional debugging messages and information (recommended for modders and level designers)"};
  73 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)"};
  74 cvar_t developer_loading = {0, "developer_loading","0", "prints information about files as they are loaded or unloaded successfully"};
  75 cvar_t developer_entityparsing = {0, "developer_entityparsing", "0", "prints detailed network entities information each time a packet is received"};
  76
  77 cvar_t timestamps = {CVAR_SAVE, "timestamps", "0", "prints timestamps on console messages"};
  78 cvar_t timeformat = {CVAR_SAVE, "timeformat", "[%Y-%m-%d %H:%M:%S] ", "time format to use on timestamped console messages"};
  79
  80 /*
  81 ================
  82 Host_AbortCurrentFrame
  83
  84 aborts the current host frame and goes on with the next one
  85 ================
  86 */
  87 void Host_AbortCurrentFrame(void)
  88 {
  89         longjmp (host_abortframe, 1);
  90 }
  91
  92 /*
  93 ================
  94 Host_Error
  95
  96 This shuts down both the client and server
  97 ================
  98 */
  99 void Host_Error (const char *error, ...)
 100 {
 101         static char hosterrorstring1[MAX_INPUTLINE];
 102         static char hosterrorstring2[MAX_INPUTLINE];
 103         static qboolean hosterror = false;
 104         va_list argptr;
 105
 106         // turn off rcon redirect if it was active when the crash occurred
 107         rcon_redirect = false;
 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 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         Cvar_RegisterVariable (&cl_alwayssleep);
 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
 232
 233 /*
 234 ===============
 235 Host_SaveConfig_f
 236
 237 Writes key bindings and archived cvars to config.cfg
 238 ===============
 239 */
 240 void Host_SaveConfig_to(const char *file)
 241 {
 242         qfile_t *f;
 243
 244 // dedicated servers initialize the host but don't parse and set the
 245 // config.cfg cvars
 246         // LordHavoc: don't save a config if it crashed in startup
 247         if (host_framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
 248         {
 249                 f = FS_Open (file, "wb", false, false);
 250                 if (!f)
 251                 {
 252                         Con_Printf("Couldn't write %s.\n", file);
 253                         return;
 254                 }
 255
 256                 Key_WriteBindings (f);
 257                 Cvar_WriteVariables (f);
 258
 259                 FS_Close (f);
 260         }
 261 }
 262 void Host_SaveConfig(void)
 263 {
 264         Host_SaveConfig_to("config.cfg");
 265 }
 266 void Host_SaveConfig_f(void)
 267 {
 268         const char *file = "config.cfg";
 269
 270         if(Cmd_Argc() >= 2) {
 271                 file = Cmd_Argv(1);
 272                 Con_Printf("Saving to %s\n", file);
 273         }
 274
 275         Host_SaveConfig_to(file);
 276 }
 277
 278 /*
 279 ===============
 280 Host_LoadConfig_f
 281
 282 Resets key bindings and cvars to defaults and then reloads scripts
 283 ===============
 284 */
 285 void Host_LoadConfig_f(void)
 286 {
 287         // unlock the cvar default strings so they can be updated by the new default.cfg
 288         Cvar_UnlockDefaults();
 289         // reset cvars to their defaults, and then exec startup scripts again
 290         Cbuf_InsertText("cvar_resettodefaults_all;exec quake.rc\n");
 291 }
 292
 293 /*
 294 =================
 295 SV_ClientPrint
 296
 297 Sends text across to be displayed
 298 FIXME: make this just a stuffed echo?
 299 =================
 300 */
 301 void SV_ClientPrint(const char *msg)
 302 {
 303         if (host_client->netconnection)
 304         {
 305                 MSG_WriteByte(&host_client->netconnection->message, svc_print);
 306                 MSG_WriteString(&host_client->netconnection->message, msg);
 307         }
 308 }
 309
 310 /*
 311 =================
 312 SV_ClientPrintf
 313
 314 Sends text across to be displayed
 315 FIXME: make this just a stuffed echo?
 316 =================
 317 */
 318 void SV_ClientPrintf(const char *fmt, ...)
 319 {
 320         va_list argptr;
 321         char msg[MAX_INPUTLINE];
 322
 323         va_start(argptr,fmt);
 324         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
 325         va_end(argptr);
 326
 327         SV_ClientPrint(msg);
 328 }
 329
 330 /*
 331 =================
 332 SV_BroadcastPrint
 333
 334 Sends text to all active clients
 335 =================
 336 */
 337 void SV_BroadcastPrint(const char *msg)
 338 {
 339         int i;
 340         client_t *client;
 341
 342         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
 343         {
 344                 if (client->active && client->netconnection)
 345                 {
 346                         MSG_WriteByte(&client->netconnection->message, svc_print);
 347                         MSG_WriteString(&client->netconnection->message, msg);
 348                 }
 349         }
 350
 351         if (sv_echobprint.integer && cls.state == ca_dedicated)
 352                 Con_Print(msg);
 353 }
 354
 355 /*
 356 =================
 357 SV_BroadcastPrintf
 358
 359 Sends text to all active clients
 360 =================
 361 */
 362 void SV_BroadcastPrintf(const char *fmt, ...)
 363 {
 364         va_list argptr;
 365         char msg[MAX_INPUTLINE];
 366
 367         va_start(argptr,fmt);
 368         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
 369         va_end(argptr);
 370
 371         SV_BroadcastPrint(msg);
 372 }
 373
 374 /*
 375 =================
 376 Host_ClientCommands
 377
 378 Send text over to the client to be executed
 379 =================
 380 */
 381 void Host_ClientCommands(const char *fmt, ...)
 382 {
 383         va_list argptr;
 384         char string[MAX_INPUTLINE];
 385
 386         if (!host_client->netconnection)
 387                 return;
 388
 389         va_start(argptr,fmt);
 390         dpvsnprintf(string, sizeof(string), fmt, argptr);
 391         va_end(argptr);
 392
 393         MSG_WriteByte(&host_client->netconnection->message, svc_stufftext);
 394         MSG_WriteString(&host_client->netconnection->message, string);
 395 }
 396
 397 /*
 398 =====================
 399 SV_DropClient
 400
 401 Called when the player is getting totally kicked off the host
 402 if (crash = true), don't bother sending signofs
 403 =====================
 404 */
 405 void SV_DropClient(qboolean crash)
 406 {
 407         int i;
 408         Con_Printf("Client \"%s\" dropped\n", host_client->name);
 409
 410         SV_StopDemoRecording(host_client);
 411
 412         // make sure edict is not corrupt (from a level change for example)
 413         host_client->edict = PRVM_EDICT_NUM(host_client - svs.clients + 1);
 414
 415         if (host_client->netconnection)
 416         {
 417                 // free the client (the body stays around)
 418                 if (!crash)
 419                 {
 420                         // LordHavoc: no opportunity for resending, so use unreliable 3 times
 421                         unsigned char bufdata[8];
 422                         sizebuf_t buf;
 423                         memset(&buf, 0, sizeof(buf));
 424                         buf.data = bufdata;
 425                         buf.maxsize = sizeof(bufdata);
 426                         MSG_WriteByte(&buf, svc_disconnect);
 427                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 428                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 429                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 430                 }
 431                 // break the net connection
 432                 NetConn_Close(host_client->netconnection);
 433                 host_client->netconnection = NULL;
 434         }
 435
 436         // call qc ClientDisconnect function
 437         // LordHavoc: don't call QC if server is dead (avoids recursive
 438         // Host_Error in some mods when they run out of edicts)
 439         if (host_client->clientconnectcalled && sv.active && host_client->edict)
 440         {
 441                 // call the prog function for removing a client
 442                 // this will set the body to a dead frame, among other things
 443                 int saveSelf = prog->globals.server->self;
 444                 host_client->clientconnectcalled = false;
 445                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
 446                 PRVM_ExecuteProgram(prog->globals.server->ClientDisconnect, "QC function ClientDisconnect is missing");
 447                 prog->globals.server->self = saveSelf;
 448         }
 449
 450         // if a download is active, close it
 451         if (host_client->download_file)
 452         {
 453                 Con_DPrintf("Download of %s aborted when %s dropped\n", host_client->download_name, host_client->name);
 454                 FS_Close(host_client->download_file);
 455                 host_client->download_file = NULL;
 456                 host_client->download_name[0] = 0;
 457                 host_client->download_expectedposition = 0;
 458                 host_client->download_started = false;
 459         }
 460
 461         // remove leaving player from scoreboard
 462         host_client->name[0] = 0;
 463         host_client->colors = 0;
 464         host_client->frags = 0;
 465         // send notification to all clients
 466         // get number of client manually just to make sure we get it right...
 467         i = host_client - svs.clients;
 468         MSG_WriteByte (&sv.reliable_datagram, svc_updatename);
 469         MSG_WriteByte (&sv.reliable_datagram, i);
 470         MSG_WriteString (&sv.reliable_datagram, host_client->name);
 471         MSG_WriteByte (&sv.reliable_datagram, svc_updatecolors);
 472         MSG_WriteByte (&sv.reliable_datagram, i);
 473         MSG_WriteByte (&sv.reliable_datagram, host_client->colors);
 474         MSG_WriteByte (&sv.reliable_datagram, svc_updatefrags);
 475         MSG_WriteByte (&sv.reliable_datagram, i);
 476         MSG_WriteShort (&sv.reliable_datagram, host_client->frags);
 477
 478         // free the client now
 479         if (host_client->entitydatabase)
 480                 EntityFrame_FreeDatabase(host_client->entitydatabase);
 481         if (host_client->entitydatabase4)
 482                 EntityFrame4_FreeDatabase(host_client->entitydatabase4);
 483         if (host_client->entitydatabase5)
 484                 EntityFrame5_FreeDatabase(host_client->entitydatabase5);
 485
 486         if (sv.active)
 487         {
 488                 // clear a fields that matter to DP_SV_CLIENTNAME and DP_SV_CLIENTCOLORS, and also frags
 489                 PRVM_ED_ClearEdict(host_client->edict);
 490         }
 491
 492         // clear the client struct (this sets active to false)
 493         memset(host_client, 0, sizeof(*host_client));
 494
 495         // update server listing on the master because player count changed
 496         // (which the master uses for filtering empty/full servers)
 497         NetConn_Heartbeat(1);
 498
 499         if (sv.loadgame)
 500         {
 501                 for (i = 0;i < svs.maxclients;i++)
 502                         if (svs.clients[i].active && !svs.clients[i].spawned)
 503                                 break;
 504                 if (i == svs.maxclients)
 505                 {
 506                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
 507                         sv.paused = sv.loadgame = false; // we're basically done with loading now
 508                 }
 509         }
 510 }
 511
 512 /*
 513 ==================
 514 Host_ShutdownServer
 515
 516 This only happens at the end of a game, not between levels
 517 ==================
 518 */
 519 void Host_ShutdownServer(void)
 520 {
 521         int i;
 522
 523         Con_DPrintf("Host_ShutdownServer\n");
 524
 525         if (!sv.active)
 526                 return;
 527
 528         NetConn_Heartbeat(2);
 529         NetConn_Heartbeat(2);
 530
 531 // make sure all the clients know we're disconnecting
 532         SV_VM_Begin();
 533         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
 534                 if (host_client->active)
 535                         SV_DropClient(false); // server shutdown
 536         if(prog->loaded)
 537                 if(prog->funcoffsets.SV_Shutdown)
 538                 {
 539                         func_t s = prog->funcoffsets.SV_Shutdown;
 540                         prog->funcoffsets.SV_Shutdown = 0; // prevent it from getting called again
 541                         PRVM_ExecuteProgram(s,"SV_Shutdown() required");
 542                 }
 543         SV_VM_End();
 544
 545         NetConn_CloseServerPorts();
 546
 547         sv.active = false;
 548 //
 549 // clear structures
 550 //
 551         memset(&sv, 0, sizeof(sv));
 552         memset(svs.clients, 0, svs.maxclients*sizeof(client_t));
 553 }
 554
 555
 556 //============================================================================
 557
 558 /*
 559 ===================
 560 Host_GetConsoleCommands
 561
 562 Add them exactly as if they had been typed at the console
 563 ===================
 564 */
 565 void Host_GetConsoleCommands (void)
 566 {
 567         char *cmd;
 568
 569         while (1)
 570         {
 571                 cmd = Sys_ConsoleInput ();
 572                 if (!cmd)
 573                         break;
 574                 Cbuf_AddText (cmd);
 575         }
 576 }
 577
 578 /*
 579 ==================
 580 Host_TimeReport
 581
 582 Returns a time report string, for example for
 583 ==================
 584 */
 585 const char *Host_TimingReport()
 586 {
 587         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);
 588 }
 589
 590 /*
 591 ==================
 592 Host_Frame
 593
 594 Runs all active servers
 595 ==================
 596 */
 597 static void Host_Init(void);
 598 void Host_Main(void)
 599 {
 600         double time1 = 0;
 601         double time2 = 0;
 602         double time3 = 0;
 603         double cl_timer, sv_timer;
 604         double clframetime, deltarealtime, oldrealtime;
 605         double wait;
 606         int pass1, pass2, pass3, i;
 607
 608         Host_Init();
 609
 610         cl_timer = 0;
 611         sv_timer = 0;
 612
 613         realtime = Sys_DoubleTime();
 614         for (;;)
 615         {
 616                 if (setjmp(host_abortframe))
 617                         continue;                       // something bad happened, or the server disconnected
 618
 619                 oldrealtime = realtime;
 620                 realtime = Sys_DoubleTime();
 621
 622                 deltarealtime = realtime - oldrealtime;
 623                 cl_timer += deltarealtime;
 624                 sv_timer += deltarealtime;
 625
 626                 svs.perf_acc_realtime += deltarealtime;
 627
 628                 // Look for clients who have spawned
 629                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
 630                         if(host_client->spawned)
 631                                 if(host_client->netconnection)
 632                                         break;
 633                 if(i == svs.maxclients)
 634                 {
 635                         // Nobody is looking? Then we won't do timing...
 636                         // Instead, reset it to zero
 637                         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;
 638                 }
 639                 else if(svs.perf_acc_realtime > 5)
 640                 {
 641                         svs.perf_cpuload = 1 - svs.perf_acc_sleeptime / svs.perf_acc_realtime;
 642                         svs.perf_lost = svs.perf_acc_lost / svs.perf_acc_realtime;
 643                         if(svs.perf_acc_offset_samples > 0)
 644                         {
 645                                 svs.perf_offset_max = svs.perf_acc_offset_max;
 646                                 svs.perf_offset_avg = svs.perf_acc_offset / svs.perf_acc_offset_samples;
 647                                 svs.perf_offset_sdev = sqrt(svs.perf_acc_offset_squared / svs.perf_acc_offset_samples - svs.perf_offset_avg * svs.perf_offset_avg);
 648                         }
 649                         if(svs.perf_lost > 0)
 650                                 Con_DPrintf("Server can't keep up: %s\n", Host_TimingReport());
 651                         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;
 652                 }
 653
 654                 if (slowmo.value < 0.00001 && slowmo.value != 0)
 655                         Cvar_SetValue("slowmo", 0);
 656                 if (host_framerate.value < 0.00001 && host_framerate.value != 0)
 657                         Cvar_SetValue("host_framerate", 0);
 658
 659                 // keep the random time dependent, but not when playing demos/benchmarking
 660                 if(!*sv_random_seed.string && !cls.demoplayback)
 661                         rand();
 662
 663                 cl.islocalgame = NetConn_IsLocalGame();
 664
 665                 // get new key events
 666                 Sys_SendKeyEvents();
 667
 668                 NetConn_UpdateSockets();
 669
 670                 Log_DestBuffer_Flush();
 671
 672                 // receive packets on each main loop iteration, as the main loop may
 673                 // be undersleeping due to select() detecting a new packet
 674                 if (sv.active)
 675                         NetConn_ServerFrame();
 676
 677                 Curl_Run();
 678
 679                 // check for commands typed to the host
 680                 Host_GetConsoleCommands();
 681
 682                 // when a server is running we only execute console commands on server frames
 683                 // (this mainly allows frikbot .way config files to work properly by staying in sync with the server qc)
 684                 // otherwise we execute them on all frames
 685                 if (sv_timer > 0 || !sv.active)
 686                 {
 687                         // process console commands
 688                         Cbuf_Execute();
 689                 }
 690
 691                 //Con_Printf("%6.0f %6.0f\n", cl_timer * 1000000.0, sv_timer * 1000000.0);
 692
 693                 // if the accumulators haven't become positive yet, wait a while
 694                 if (cls.state == ca_dedicated)
 695                         wait = sv_timer * -1000000.0;
 696                 else if (!sv.active)
 697                         wait = cl_timer * -1000000.0;
 698                 else
 699                         wait = max(cl_timer, sv_timer) * -1000000.0;
 700                 wait = bound(0, wait, 100000);
 701
 702                 if (!cls.timedemo && wait > 0)
 703                 {
 704                         double time0 = Sys_DoubleTime();
 705                         if (sv_checkforpacketsduringsleep.integer)
 706                                 NetConn_SleepMicroseconds((int)wait);
 707                         else
 708                                 Sys_Sleep((int)wait);
 709                         svs.perf_acc_sleeptime += Sys_DoubleTime() - time0;
 710                         continue;
 711                 }
 712
 713         //-------------------
 714         //
 715         // server operations
 716         //
 717         //-------------------
 718
 719                 // limit the frametime steps to no more than 100ms each
 720                 if (cl_timer > 0.1)
 721                         cl_timer = 0.1;
 722                 if (sv_timer > 0.1)
 723                 {
 724                         svs.perf_acc_lost += (sv_timer - 0.1);
 725                         sv_timer = 0.1;
 726                 }
 727
 728                 if (sv.active && sv_timer > 0)
 729                 {
 730                         // execute one or more server frames, with an upper limit on how much
 731                         // execution time to spend on server frames to avoid freezing the game if
 732                         // the server is overloaded, this execution time limit means the game will
 733                         // slow down if the server is taking too long.
 734                         int framecount, framelimit = 1;
 735                         double advancetime, aborttime = 0;
 736                         float offset;
 737
 738                         // run the world state
 739                         // don't allow simulation to run too fast or too slow or logic glitches can occur
 740
 741                         // stop running server frames if the wall time reaches this value
 742                         if (sys_ticrate.value <= 0)
 743                                 advancetime = sv_timer;
 744                         else if (cl.islocalgame && !sv_fixedframeratesingleplayer.integer)
 745                         {
 746                                 // synchronize to the client frametime, but no less than 10ms and no more than sys_ticrate
 747                                 advancetime = bound(0.01, cl_timer, sys_ticrate.value);
 748                                 framelimit = 10;
 749                                 aborttime = realtime + 0.1;
 750                         }
 751                         else
 752                         {
 753                                 advancetime = sys_ticrate.value;
 754                                 // listen servers can run multiple server frames per client frame
 755                                 if (cls.state == ca_connected)
 756                                 {
 757                                         framelimit = 10;
 758                                         aborttime = realtime + 0.1;
 759                                 }
 760                         }
 761                         advancetime = min(advancetime, 0.1);
 762
 763                         if(advancetime > 0)
 764                         {
 765                                 offset = sv_timer + (Sys_DoubleTime() - realtime);
 766                                 ++svs.perf_acc_offset_samples;
 767                                 svs.perf_acc_offset += offset;
 768                                 svs.perf_acc_offset_squared += offset * offset;
 769                                 if(svs.perf_acc_offset_max < offset)
 770                                         svs.perf_acc_offset_max = offset;
 771                         }
 772
 773                         // only advance time if not paused
 774                         // the game also pauses in singleplayer when menu or console is used
 775                         sv.frametime = advancetime * slowmo.value;
 776                         if (host_framerate.value)
 777                                 sv.frametime = host_framerate.value;
 778                         if (sv.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive)))
 779                                 sv.frametime = 0;
 780
 781                         // setup the VM frame
 782                         SV_VM_Begin();
 783
 784                         for (framecount = 0;framecount < framelimit && sv_timer > 0;framecount++)
 785                         {
 786                                 sv_timer -= advancetime;
 787
 788                                 // move things around and think unless paused
 789                                 if (sv.frametime)
 790                                         SV_Physics();
 791
 792                                 // if this server frame took too long, break out of the loop
 793                                 if (framelimit > 1 && Sys_DoubleTime() >= aborttime)
 794                                         break;
 795                         }
 796
 797                         // send all messages to the clients
 798                         SV_SendClientMessages();
 799
 800                         // end the server VM frame
 801                         SV_VM_End();
 802
 803                         // send an heartbeat if enough time has passed since the last one
 804                         NetConn_Heartbeat(0);
 805                 }
 806
 807         //-------------------
 808         //
 809         // client operations
 810         //
 811         //-------------------
 812
 813                 if (cls.state != ca_dedicated && (cl_timer > 0 || cls.timedemo))
 814                 {
 815                         // decide the simulation time
 816                         if (cls.capturevideo.active)
 817                         {
 818                                 if (cls.capturevideo.realtime)
 819                                         clframetime = cl.realframetime = max(cl_timer, 1.0 / cls.capturevideo.framerate);
 820                                 else
 821                                 {
 822                                         clframetime = 1.0 / cls.capturevideo.framerate;
 823                                         cl.realframetime = max(cl_timer, clframetime);
 824                                 }
 825                         }
 826                         else if (vid_activewindow)
 827                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxfps.value));
 828                         else
 829                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxidlefps.value));
 830
 831                         // apply slowmo scaling
 832                         clframetime *= cl.movevars_timescale;
 833                         // scale playback speed of demos by slowmo cvar
 834                         if (cls.demoplayback)
 835                         {
 836                                 clframetime *= slowmo.value;
 837                                 // if demo playback is paused, don't advance time at all
 838                                 if (cls.demopaused)
 839                                         clframetime = 0;
 840                         }
 841
 842                         // host_framerate overrides all else
 843                         if (host_framerate.value)
 844                                 clframetime = host_framerate.value;
 845
 846                         if (cls.timedemo)
 847                                 clframetime = cl.realframetime = cl_timer;
 848
 849                         // deduct the frame time from the accumulator
 850                         cl_timer -= cl.realframetime;
 851
 852                         cl.oldtime = cl.time;
 853                         cl.time += clframetime;
 854
 855                         // Collect input into cmd
 856                         CL_Input();
 857
 858                         // check for new packets
 859                         NetConn_ClientFrame();
 860
 861                         // read a new frame from a demo if needed
 862                         CL_ReadDemoMessage();
 863
 864                         // now that packets have been read, send input to server
 865                         CL_SendMove();
 866
 867                         // update client world (interpolate entities, create trails, etc)
 868                         CL_UpdateWorld();
 869
 870                         // update video
 871                         if (host_speeds.integer)
 872                                 time1 = Sys_DoubleTime();
 873
 874                         //ui_update();
 875
 876                         CL_Video_Frame();
 877                         CL_Gecko_Frame();
 878
 879                         CL_UpdateScreen();
 880
 881                         if (host_speeds.integer)
 882                                 time2 = Sys_DoubleTime();
 883
 884                         // update audio
 885                         if(cl.csqc_usecsqclistener)
 886                         {
 887                                 S_Update(&cl.csqc_listenermatrix);
 888                                 cl.csqc_usecsqclistener = false;
 889                         }
 890                         else
 891                                 S_Update(&r_refdef.view.matrix);
 892
 893                         CDAudio_Update();
 894
 895                         if (host_speeds.integer)
 896                         {
 897                                 pass1 = (int)((time1 - time3)*1000000);
 898                                 time3 = Sys_DoubleTime();
 899                                 pass2 = (int)((time2 - time1)*1000000);
 900                                 pass3 = (int)((time3 - time2)*1000000);
 901                                 Con_Printf("%6ius total %6ius server %6ius gfx %6ius snd\n",
 902                                                         pass1+pass2+pass3, pass1, pass2, pass3);
 903                         }
 904                 }
 905
 906                 // if there is some time remaining from this frame, reset the timers
 907                 if (cl_timer >= 0)
 908                         cl_timer = 0;
 909                 if (sv_timer >= 0)
 910                 {
 911                         svs.perf_acc_lost += sv_timer;
 912                         sv_timer = 0;
 913                 }
 914
 915                 host_framecount++;
 916
 917                 if (cl_alwayssleep.integer)
 918                         Sys_Sleep(0);
 919         }
 920 }
 921
 922 //============================================================================
 923
 924 qboolean vid_opened = false;
 925 void Host_StartVideo(void)
 926 {
 927         if (!vid_opened && cls.state != ca_dedicated)
 928         {
 929                 vid_opened = true;
 930                 VID_Start();
 931                 CDAudio_Startup();
 932         }
 933 }
 934
 935 char engineversion[128];
 936
 937 qboolean sys_nostdout = false;
 938
 939 extern void Render_Init(void);
 940 extern void Mathlib_Init(void);
 941 extern void FS_Init(void);
 942 extern void FS_Shutdown(void);
 943 extern void PR_Cmd_Init(void);
 944 extern void COM_Init_Commands(void);
 945 extern void FS_Init_Commands(void);
 946 extern qboolean host_stuffcmdsrun;
 947
 948 /*
 949 ====================
 950 Host_Init
 951 ====================
 952 */
 953 static void Host_Init (void)
 954 {
 955         int i;
 956         const char* os;
 957
 958         if (COM_CheckParm("-profilegameonly"))
 959                 Sys_AllowProfiling(false);
 960
 961         // LordHavoc: quake never seeded the random number generator before... heh
 962         if (COM_CheckParm("-benchmark"))
 963                 srand(0); // predictable random sequence for -benchmark
 964         else
 965                 srand(time(NULL));
 966
 967         // FIXME: this is evil, but possibly temporary
 968 // COMMANDLINEOPTION: Console: -developer enables warnings and other notices (RECOMMENDED for mod developers)
 969         if (COM_CheckParm("-developer"))
 970         {
 971                 developer.value = developer.integer = 1;
 972                 developer.string = "1";
 973         }
 974
 975         if (COM_CheckParm("-developer2"))
 976         {
 977                 developer.value = developer.integer = 100;
 978                 developer.string = "100";
 979                 developer_memory.value = developer_memory.integer = 100;
 980                 developer.string = "100";
 981                 developer_memorydebug.value = developer_memorydebug.integer = 100;
 982                 developer_memorydebug.string = "100";
 983         }
 984
 985 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
 986         if (COM_CheckParm("-nostdout"))
 987                 sys_nostdout = 1;
 988
 989         // used by everything
 990         Memory_Init();
 991
 992         // initialize console command/cvar/alias/command execution systems
 993         Cmd_Init();
 994
 995         // initialize memory subsystem cvars/commands
 996         Memory_Init_Commands();
 997
 998         // initialize console and logging and its cvars/commands
 999         Con_Init();
1000
1001         // initialize various cvars that could not be initialized earlier
1002         Curl_Init_Commands();
1003         Cmd_Init_Commands();
1004         Sys_Init_Commands();
1005         COM_Init_Commands();
1006         FS_Init_Commands();
1007
1008         // initialize console window (only used by sys_win.c)
1009         Sys_InitConsole();
1010
1011         // detect gamemode from commandline options or executable name
1012         COM_InitGameType();
1013
1014         // construct a version string for the corner of the console
1015         os = DP_OS_NAME;
1016         dpsnprintf (engineversion, sizeof (engineversion), "%s %s %s", gamename, os, buildstring);
1017         Con_Printf("%s\n", engineversion);
1018
1019         // initialize ixtable
1020         Mathlib_Init();
1021
1022         // initialize filesystem (including fs_basedir, fs_gamedir, -game, scr_screenshot_name)
1023         FS_Init();
1024
1025         NetConn_Init();
1026         Curl_Init();
1027         //PR_Init();
1028         //PR_Cmd_Init();
1029         PRVM_Init();
1030         Mod_Init();
1031         World_Init();
1032         SV_Init();
1033         Host_InitCommands();
1034         Host_InitLocal();
1035         Host_ServerOptions();
1036
1037         if (cls.state != ca_dedicated)
1038         {
1039                 Con_DPrintf("Initializing client\n");
1040
1041                 R_Modules_Init();
1042                 Palette_Init();
1043                 MR_Init_Commands();
1044                 VID_Shared_Init();
1045                 VID_Init();
1046                 Render_Init();
1047                 S_Init();
1048                 CDAudio_Init();
1049                 Key_Init();
1050                 V_Init();
1051                 CL_Init();
1052         }
1053
1054         // set up the default startmap_sp and startmap_dm aliases (mods can
1055         // override these) and then execute the quake.rc startup script
1056         if (gamemode == GAME_NEHAHRA)
1057                 Cbuf_AddText("alias startmap_sp \"map nehstart\"\nalias startmap_dm \"map nehstart\"\nexec quake.rc\n");
1058         else if (gamemode == GAME_TRANSFUSION)
1059                 Cbuf_AddText("alias startmap_sp \"map e1m1\"\n""alias startmap_dm \"map bb1\"\nexec quake.rc\n");
1060         else if (gamemode == GAME_TEU)
1061                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec teu.rc\n");
1062         else
1063                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec quake.rc\n");
1064         Cbuf_Execute();
1065
1066         // if stuffcmds wasn't run, then quake.rc is probably missing, use default
1067         if (!host_stuffcmdsrun)
1068         {
1069                 Cbuf_AddText("exec default.cfg\nexec config.cfg\nexec autoexec.cfg\nstuffcmds\n");
1070                 Cbuf_Execute();
1071         }
1072
1073         // put up the loading image so the user doesn't stare at a black screen...
1074         SCR_BeginLoadingPlaque();
1075
1076         // FIXME: put this into some neat design, but the menu should be allowed to crash
1077         // without crashing the whole game, so this should just be a short-time solution
1078
1079         // here comes the not so critical stuff
1080         if (setjmp(host_abortframe)) {
1081                 return;
1082         }
1083
1084         if (cls.state != ca_dedicated)
1085         {
1086                 MR_Init();
1087         }
1088
1089         // check for special benchmark mode
1090 // 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)
1091         i = COM_CheckParm("-benchmark");
1092         if (i && i + 1 < com_argc)
1093         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1094         {
1095                 Cbuf_AddText(va("timedemo %s\n", com_argv[i + 1]));
1096                 Cbuf_Execute();
1097         }
1098
1099         // check for special demo mode
1100 // COMMANDLINEOPTION: Client: -demo <demoname> runs a playdemo and quits
1101         i = COM_CheckParm("-demo");
1102         if (i && i + 1 < com_argc)
1103         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1104         {
1105                 Cbuf_AddText(va("playdemo %s\n", com_argv[i + 1]));
1106                 Cbuf_Execute();
1107         }
1108
1109 // COMMANDLINEOPTION: Client: -capturedemo <demoname> captures a playdemo and quits
1110         i = COM_CheckParm("-capturedemo");
1111         if (i && i + 1 < com_argc)
1112         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1113         {
1114                 Cbuf_AddText(va("playdemo %s\ncl_capturevideo 1\n", com_argv[i + 1]));
1115                 Cbuf_Execute();
1116         }
1117
1118         if (cls.state == ca_dedicated || COM_CheckParm("-listen"))
1119         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1120         {
1121                 Cbuf_AddText("startmap_dm\n");
1122                 Cbuf_Execute();
1123         }
1124
1125         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1126         {
1127                 Cbuf_AddText("togglemenu\n");
1128                 Cbuf_Execute();
1129         }
1130
1131         Con_DPrint("========Initialized=========\n");
1132
1133         //Host_StartVideo();
1134 }
1135
1136
1137 /*
1138 ===============
1139 Host_Shutdown
1140
1141 FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
1142 to run quit through here before the final handoff to the sys code.
1143 ===============
1144 */
1145 void Host_Shutdown(void)
1146 {
1147         static qboolean isdown = false;
1148
1149         if (isdown)
1150         {
1151                 Con_Print("recursive shutdown\n");
1152                 return;
1153         }
1154         if (setjmp(host_abortframe))
1155         {
1156                 Con_Print("aborted the quitting frame?!?\n");
1157                 return;
1158         }
1159         isdown = true;
1160
1161         // be quiet while shutting down
1162         S_StopAllSounds();
1163
1164         // disconnect client from server if active
1165         CL_Disconnect();
1166
1167         // shut down local server if active
1168         Host_ShutdownServer ();
1169
1170         // Shutdown menu
1171         if(MR_Shutdown)
1172                 MR_Shutdown();
1173
1174         // AK shutdown PRVM
1175         // AK hmm, no PRVM_Shutdown(); yet
1176
1177         CL_Gecko_Shutdown();
1178         CL_Video_Shutdown();
1179
1180         Host_SaveConfig();
1181
1182         CDAudio_Shutdown ();
1183         S_Terminate ();
1184         Curl_Shutdown ();
1185         NetConn_Shutdown ();
1186         //PR_Shutdown ();
1187
1188         if (cls.state != ca_dedicated)
1189         {
1190                 R_Modules_Shutdown();
1191                 VID_Shutdown();
1192         }
1193
1194         Cmd_Shutdown();
1195         CL_Shutdown();
1196         Sys_Shutdown();
1197         Log_Close();
1198         FS_Shutdown();
1199         Memory_Shutdown();
1200 }
1201