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 double host_starttime = 0;
  58
  59 // pretend frames take this amount of time (in seconds), 0 = realtime
  60 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"};
  61 // shows time used by certain subsystems
  62 cvar_t host_speeds = {0, "host_speeds","0", "reports how much time is used in server/graphics/sound"};
  63 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"};
  64 cvar_t cl_minfps_fade = {CVAR_SAVE, "cl_minfps_fade", "0.2", "how fast the quality adapts to varying framerate"};
  65 cvar_t cl_minfps_qualitymax = {CVAR_SAVE, "cl_minfps_qualitymax", "1", "highest allowed drawdistance multiplier"};
  66 cvar_t cl_minfps_qualitymin = {CVAR_SAVE, "cl_minfps_qualitymin", "0.25", "lowest allowed drawdistance multiplier"};
  67 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"};
  68 cvar_t cl_minfps_qualityscale = {CVAR_SAVE, "cl_minfps_qualityscale", "0.5", "multiplier for quality"};
  69 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)"};
  70 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"};
  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         // to prevent loops when it is a networking problem
 108         Con_Rcon_Redirect_Abort();
 109
 110         va_start (argptr,error);
 111         dpvsnprintf (hosterrorstring1,sizeof(hosterrorstring1),error,argptr);
 112         va_end (argptr);
 113
 114         Con_Printf("Host_Error: %s\n", hosterrorstring1);
 115
 116         // LordHavoc: if crashing very early, or currently shutting down, do
 117         // Sys_Error instead
 118         if (host_framecount < 3 || host_shuttingdown)
 119                 Sys_Error ("Host_Error: %s", hosterrorstring1);
 120
 121         if (hosterror)
 122                 Sys_Error ("Host_Error: recursively entered (original error was: %s    new error is: %s)", hosterrorstring2, hosterrorstring1);
 123         hosterror = true;
 124
 125         strlcpy(hosterrorstring2, hosterrorstring1, sizeof(hosterrorstring2));
 126
 127         CL_Parse_DumpPacket();
 128
 129         CL_Parse_ErrorCleanUp();
 130
 131         //PR_Crash();
 132
 133         // print out where the crash happened, if it was caused by QC (and do a cleanup)
 134         PRVM_Crash();
 135
 136
 137         Host_ShutdownServer ();
 138
 139         if (cls.state == ca_dedicated)
 140                 Sys_Error ("Host_Error: %s",hosterrorstring2);  // dedicated servers exit
 141
 142         CL_Disconnect ();
 143         cls.demonum = -1;
 144
 145         hosterror = false;
 146
 147         Host_AbortCurrentFrame();
 148 }
 149
 150 void Host_ServerOptions (void)
 151 {
 152         int i;
 153
 154         // general default
 155         svs.maxclients = 8;
 156
 157 // COMMANDLINEOPTION: Server: -dedicated [playerlimit] starts a dedicated server (with a command console), default playerlimit is 8
 158 // COMMANDLINEOPTION: Server: -listen [playerlimit] starts a multiplayer server with graphical client, like singleplayer but other players can connect, default playerlimit is 8
 159         // if no client is in the executable or -dedicated is specified on
 160         // commandline, start a dedicated server
 161         i = COM_CheckParm ("-dedicated");
 162         if (i || !cl_available)
 163         {
 164                 cls.state = ca_dedicated;
 165                 // check for -dedicated specifying how many players
 166                 if (i && i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
 167                         svs.maxclients = atoi (com_argv[i+1]);
 168                 if (COM_CheckParm ("-listen"))
 169                         Con_Printf ("Only one of -dedicated or -listen can be specified\n");
 170                 // default sv_public on for dedicated servers (often hosted by serious administrators), off for listen servers (often hosted by clueless users)
 171                 Cvar_SetValue("sv_public", 1);
 172         }
 173         else if (cl_available)
 174         {
 175                 // client exists and not dedicated, check if -listen is specified
 176                 cls.state = ca_disconnected;
 177                 i = COM_CheckParm ("-listen");
 178                 if (i)
 179                 {
 180                         // default players unless specified
 181                         if (i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
 182                                 svs.maxclients = atoi (com_argv[i+1]);
 183                 }
 184                 else
 185                 {
 186                         // default players in some games, singleplayer in most
 187                         if (gamemode != GAME_GOODVSBAD2 && gamemode != GAME_NEXUIZ && gamemode != GAME_BATTLEMECH)
 188                                 svs.maxclients = 1;
 189                 }
 190         }
 191
 192         svs.maxclients = svs.maxclients_next = bound(1, svs.maxclients, MAX_SCOREBOARD);
 193
 194         svs.clients = (client_t *)Mem_Alloc(sv_mempool, sizeof(client_t) * svs.maxclients);
 195
 196         if (svs.maxclients > 1 && !deathmatch.integer && !coop.integer)
 197                 Cvar_SetValueQuick(&deathmatch, 1);
 198 }
 199
 200 /*
 201 =======================
 202 Host_InitLocal
 203 ======================
 204 */
 205 void Host_SaveConfig_f(void);
 206 void Host_LoadConfig_f(void);
 207 extern cvar_t sv_writepicture_quality;
 208 static void Host_InitLocal (void)
 209 {
 210         Cmd_AddCommand("saveconfig", Host_SaveConfig_f, "save settings to config.cfg (or a specified filename) immediately (also automatic when quitting)");
 211         Cmd_AddCommand("loadconfig", Host_LoadConfig_f, "reset everything and reload configs");
 212
 213         Cvar_RegisterVariable (&host_framerate);
 214         Cvar_RegisterVariable (&host_speeds);
 215         Cvar_RegisterVariable (&cl_minfps);
 216         Cvar_RegisterVariable (&cl_minfps_fade);
 217         Cvar_RegisterVariable (&cl_minfps_qualitymax);
 218         Cvar_RegisterVariable (&cl_minfps_qualitymin);
 219         Cvar_RegisterVariable (&cl_minfps_qualitypower);
 220         Cvar_RegisterVariable (&cl_minfps_qualityscale);
 221         Cvar_RegisterVariable (&cl_maxfps);
 222         Cvar_RegisterVariable (&cl_maxidlefps);
 223
 224         Cvar_RegisterVariable (&developer);
 225         Cvar_RegisterVariable (&developer_loadfile);
 226         Cvar_RegisterVariable (&developer_loading);
 227         Cvar_RegisterVariable (&developer_entityparsing);
 228
 229         Cvar_RegisterVariable (&timestamps);
 230         Cvar_RegisterVariable (&timeformat);
 231
 232         Cvar_RegisterVariable (&sv_writepicture_quality);
 233 }
 234
 235
 236 /*
 237 ===============
 238 Host_SaveConfig_f
 239
 240 Writes key bindings and archived cvars to config.cfg
 241 ===============
 242 */
 243 void Host_SaveConfig_to(const char *file)
 244 {
 245         qfile_t *f;
 246
 247 // dedicated servers initialize the host but don't parse and set the
 248 // config.cfg cvars
 249         // LordHavoc: don't save a config if it crashed in startup
 250         if (host_framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
 251         {
 252                 f = FS_OpenRealFile(file, "wb", false);
 253                 if (!f)
 254                 {
 255                         Con_Printf("Couldn't write %s.\n", file);
 256                         return;
 257                 }
 258
 259                 Key_WriteBindings (f);
 260                 Cvar_WriteVariables (f);
 261
 262                 FS_Close (f);
 263         }
 264 }
 265 void Host_SaveConfig(void)
 266 {
 267         Host_SaveConfig_to("config.cfg");
 268 }
 269 void Host_SaveConfig_f(void)
 270 {
 271         const char *file = "config.cfg";
 272
 273         if(Cmd_Argc() >= 2) {
 274                 file = Cmd_Argv(1);
 275                 Con_Printf("Saving to %s\n", file);
 276         }
 277
 278         Host_SaveConfig_to(file);
 279 }
 280
 281 /*
 282 ===============
 283 Host_LoadConfig_f
 284
 285 Resets key bindings and cvars to defaults and then reloads scripts
 286 ===============
 287 */
 288 void Host_LoadConfig_f(void)
 289 {
 290         // unlock the cvar default strings so they can be updated by the new default.cfg
 291         Cvar_UnlockDefaults();
 292         // reset cvars to their defaults, and then exec startup scripts again
 293         Cbuf_InsertText("cvar_resettodefaults_all;exec quake.rc\n");
 294 }
 295
 296 /*
 297 =================
 298 SV_ClientPrint
 299
 300 Sends text across to be displayed
 301 FIXME: make this just a stuffed echo?
 302 =================
 303 */
 304 void SV_ClientPrint(const char *msg)
 305 {
 306         if (host_client->netconnection)
 307         {
 308                 MSG_WriteByte(&host_client->netconnection->message, svc_print);
 309                 MSG_WriteString(&host_client->netconnection->message, msg);
 310         }
 311 }
 312
 313 /*
 314 =================
 315 SV_ClientPrintf
 316
 317 Sends text across to be displayed
 318 FIXME: make this just a stuffed echo?
 319 =================
 320 */
 321 void SV_ClientPrintf(const char *fmt, ...)
 322 {
 323         va_list argptr;
 324         char msg[MAX_INPUTLINE];
 325
 326         va_start(argptr,fmt);
 327         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
 328         va_end(argptr);
 329
 330         SV_ClientPrint(msg);
 331 }
 332
 333 /*
 334 =================
 335 SV_BroadcastPrint
 336
 337 Sends text to all active clients
 338 =================
 339 */
 340 void SV_BroadcastPrint(const char *msg)
 341 {
 342         int i;
 343         client_t *client;
 344
 345         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
 346         {
 347                 if (client->active && client->netconnection)
 348                 {
 349                         MSG_WriteByte(&client->netconnection->message, svc_print);
 350                         MSG_WriteString(&client->netconnection->message, msg);
 351                 }
 352         }
 353
 354         if (sv_echobprint.integer && cls.state == ca_dedicated)
 355                 Con_Print(msg);
 356 }
 357
 358 /*
 359 =================
 360 SV_BroadcastPrintf
 361
 362 Sends text to all active clients
 363 =================
 364 */
 365 void SV_BroadcastPrintf(const char *fmt, ...)
 366 {
 367         va_list argptr;
 368         char msg[MAX_INPUTLINE];
 369
 370         va_start(argptr,fmt);
 371         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
 372         va_end(argptr);
 373
 374         SV_BroadcastPrint(msg);
 375 }
 376
 377 /*
 378 =================
 379 Host_ClientCommands
 380
 381 Send text over to the client to be executed
 382 =================
 383 */
 384 void Host_ClientCommands(const char *fmt, ...)
 385 {
 386         va_list argptr;
 387         char string[MAX_INPUTLINE];
 388
 389         if (!host_client->netconnection)
 390                 return;
 391
 392         va_start(argptr,fmt);
 393         dpvsnprintf(string, sizeof(string), fmt, argptr);
 394         va_end(argptr);
 395
 396         MSG_WriteByte(&host_client->netconnection->message, svc_stufftext);
 397         MSG_WriteString(&host_client->netconnection->message, string);
 398 }
 399
 400 /*
 401 =====================
 402 SV_DropClient
 403
 404 Called when the player is getting totally kicked off the host
 405 if (crash = true), don't bother sending signofs
 406 =====================
 407 */
 408 void SV_DropClient(qboolean crash)
 409 {
 410         int i;
 411         Con_Printf("Client \"%s\" dropped\n", host_client->name);
 412
 413         SV_StopDemoRecording(host_client);
 414
 415         // make sure edict is not corrupt (from a level change for example)
 416         host_client->edict = PRVM_EDICT_NUM(host_client - svs.clients + 1);
 417
 418         if (host_client->netconnection)
 419         {
 420                 // free the client (the body stays around)
 421                 if (!crash)
 422                 {
 423                         // LordHavoc: no opportunity for resending, so use unreliable 3 times
 424                         unsigned char bufdata[8];
 425                         sizebuf_t buf;
 426                         memset(&buf, 0, sizeof(buf));
 427                         buf.data = bufdata;
 428                         buf.maxsize = sizeof(bufdata);
 429                         MSG_WriteByte(&buf, svc_disconnect);
 430                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 431                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 432                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 433                 }
 434                 // break the net connection
 435                 NetConn_Close(host_client->netconnection);
 436                 host_client->netconnection = NULL;
 437         }
 438
 439         // call qc ClientDisconnect function
 440         // LordHavoc: don't call QC if server is dead (avoids recursive
 441         // Host_Error in some mods when they run out of edicts)
 442         if (host_client->clientconnectcalled && sv.active && host_client->edict)
 443         {
 444                 // call the prog function for removing a client
 445                 // this will set the body to a dead frame, among other things
 446                 int saveSelf = prog->globals.server->self;
 447                 host_client->clientconnectcalled = false;
 448                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
 449                 PRVM_ExecuteProgram(prog->globals.server->ClientDisconnect, "QC function ClientDisconnect is missing");
 450                 prog->globals.server->self = saveSelf;
 451         }
 452
 453         // if a download is active, close it
 454         if (host_client->download_file)
 455         {
 456                 Con_DPrintf("Download of %s aborted when %s dropped\n", host_client->download_name, host_client->name);
 457                 FS_Close(host_client->download_file);
 458                 host_client->download_file = NULL;
 459                 host_client->download_name[0] = 0;
 460                 host_client->download_expectedposition = 0;
 461                 host_client->download_started = false;
 462         }
 463
 464         // remove leaving player from scoreboard
 465         host_client->name[0] = 0;
 466         host_client->colors = 0;
 467         host_client->frags = 0;
 468         // send notification to all clients
 469         // get number of client manually just to make sure we get it right...
 470         i = host_client - svs.clients;
 471         MSG_WriteByte (&sv.reliable_datagram, svc_updatename);
 472         MSG_WriteByte (&sv.reliable_datagram, i);
 473         MSG_WriteString (&sv.reliable_datagram, host_client->name);
 474         MSG_WriteByte (&sv.reliable_datagram, svc_updatecolors);
 475         MSG_WriteByte (&sv.reliable_datagram, i);
 476         MSG_WriteByte (&sv.reliable_datagram, host_client->colors);
 477         MSG_WriteByte (&sv.reliable_datagram, svc_updatefrags);
 478         MSG_WriteByte (&sv.reliable_datagram, i);
 479         MSG_WriteShort (&sv.reliable_datagram, host_client->frags);
 480
 481         // free the client now
 482         if (host_client->entitydatabase)
 483                 EntityFrame_FreeDatabase(host_client->entitydatabase);
 484         if (host_client->entitydatabase4)
 485                 EntityFrame4_FreeDatabase(host_client->entitydatabase4);
 486         if (host_client->entitydatabase5)
 487                 EntityFrame5_FreeDatabase(host_client->entitydatabase5);
 488
 489         if (sv.active)
 490         {
 491                 // clear a fields that matter to DP_SV_CLIENTNAME and DP_SV_CLIENTCOLORS, and also frags
 492                 PRVM_ED_ClearEdict(host_client->edict);
 493         }
 494
 495         // clear the client struct (this sets active to false)
 496         memset(host_client, 0, sizeof(*host_client));
 497
 498         // update server listing on the master because player count changed
 499         // (which the master uses for filtering empty/full servers)
 500         NetConn_Heartbeat(1);
 501
 502         if (sv.loadgame)
 503         {
 504                 for (i = 0;i < svs.maxclients;i++)
 505                         if (svs.clients[i].active && !svs.clients[i].spawned)
 506                                 break;
 507                 if (i == svs.maxclients)
 508                 {
 509                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
 510                         sv.paused = sv.loadgame = false; // we're basically done with loading now
 511                 }
 512         }
 513 }
 514
 515 /*
 516 ==================
 517 Host_ShutdownServer
 518
 519 This only happens at the end of a game, not between levels
 520 ==================
 521 */
 522 void Host_ShutdownServer(void)
 523 {
 524         int i;
 525
 526         Con_DPrintf("Host_ShutdownServer\n");
 527
 528         if (!sv.active)
 529                 return;
 530
 531         NetConn_Heartbeat(2);
 532         NetConn_Heartbeat(2);
 533
 534 // make sure all the clients know we're disconnecting
 535         SV_VM_Begin();
 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         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
 544                 if (host_client->active)
 545                         SV_DropClient(false); // server shutdown
 546         SV_VM_End();
 547
 548         NetConn_CloseServerPorts();
 549
 550         sv.active = false;
 551 //
 552 // clear structures
 553 //
 554         memset(&sv, 0, sizeof(sv));
 555         memset(svs.clients, 0, svs.maxclients*sizeof(client_t));
 556 }
 557
 558
 559 //============================================================================
 560
 561 /*
 562 ===================
 563 Host_GetConsoleCommands
 564
 565 Add them exactly as if they had been typed at the console
 566 ===================
 567 */
 568 void Host_GetConsoleCommands (void)
 569 {
 570         char *cmd;
 571
 572         while (1)
 573         {
 574                 cmd = Sys_ConsoleInput ();
 575                 if (!cmd)
 576                         break;
 577                 Cbuf_AddText (cmd);
 578         }
 579 }
 580
 581 /*
 582 ==================
 583 Host_TimeReport
 584
 585 Returns a time report string, for example for
 586 ==================
 587 */
 588 const char *Host_TimingReport()
 589 {
 590         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);
 591 }
 592
 593 /*
 594 ==================
 595 Host_Frame
 596
 597 Runs all active servers
 598 ==================
 599 */
 600 static void Host_Init(void);
 601 void Host_Main(void)
 602 {
 603         double time1 = 0;
 604         double time2 = 0;
 605         double time3 = 0;
 606         double cl_timer, sv_timer;
 607         double clframetime, deltarealtime, oldrealtime;
 608         double wait;
 609         int pass1, pass2, pass3, i;
 610
 611         Host_Init();
 612
 613         cl_timer = 0;
 614         sv_timer = 0;
 615
 616         realtime = host_starttime = Sys_DoubleTime();
 617         for (;;)
 618         {
 619                 if (setjmp(host_abortframe))
 620                         continue;                       // something bad happened, or the server disconnected
 621
 622                 oldrealtime = realtime;
 623                 realtime = Sys_DoubleTime();
 624
 625                 deltarealtime = realtime - oldrealtime;
 626                 cl_timer += deltarealtime;
 627                 sv_timer += deltarealtime;
 628
 629                 svs.perf_acc_realtime += deltarealtime;
 630
 631                 // Look for clients who have spawned
 632                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
 633                         if(host_client->spawned)
 634                                 if(host_client->netconnection)
 635                                         break;
 636                 if(i == svs.maxclients)
 637                 {
 638                         // Nobody is looking? Then we won't do timing...
 639                         // Instead, reset it to zero
 640                         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;
 641                 }
 642                 else if(svs.perf_acc_realtime > 5)
 643                 {
 644                         svs.perf_cpuload = 1 - svs.perf_acc_sleeptime / svs.perf_acc_realtime;
 645                         svs.perf_lost = svs.perf_acc_lost / svs.perf_acc_realtime;
 646                         if(svs.perf_acc_offset_samples > 0)
 647                         {
 648                                 svs.perf_offset_max = svs.perf_acc_offset_max;
 649                                 svs.perf_offset_avg = svs.perf_acc_offset / svs.perf_acc_offset_samples;
 650                                 svs.perf_offset_sdev = sqrt(svs.perf_acc_offset_squared / svs.perf_acc_offset_samples - svs.perf_offset_avg * svs.perf_offset_avg);
 651                         }
 652                         if(svs.perf_lost > 0)
 653                                 Con_DPrintf("Server can't keep up: %s\n", Host_TimingReport());
 654                         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;
 655                 }
 656
 657                 if (slowmo.value < 0.00001 && slowmo.value != 0)
 658                         Cvar_SetValue("slowmo", 0);
 659                 if (host_framerate.value < 0.00001 && host_framerate.value != 0)
 660                         Cvar_SetValue("host_framerate", 0);
 661
 662                 // keep the random time dependent, but not when playing demos/benchmarking
 663                 if(!*sv_random_seed.string && !cls.demoplayback)
 664                         rand();
 665
 666                 cl.islocalgame = NetConn_IsLocalGame();
 667
 668                 // begin gathering mouse input
 669                 in_mouse_x = in_mouse_y = 0;
 670
 671                 // get new key events
 672                 Sys_SendKeyEvents();
 673
 674                 NetConn_UpdateSockets();
 675
 676                 Log_DestBuffer_Flush();
 677
 678                 // receive packets on each main loop iteration, as the main loop may
 679                 // be undersleeping due to select() detecting a new packet
 680                 if (sv.active)
 681                         NetConn_ServerFrame();
 682
 683                 Curl_Run();
 684
 685                 // check for commands typed to the host
 686                 Host_GetConsoleCommands();
 687
 688                 // when a server is running we only execute console commands on server frames
 689                 // (this mainly allows frikbot .way config files to work properly by staying in sync with the server qc)
 690                 // otherwise we execute them on client frames
 691                 if (sv.active ? sv_timer > 0 : cl_timer > 0)
 692                 {
 693                         // process console commands
 694                         Cbuf_Execute();
 695                 }
 696
 697                 //Con_Printf("%6.0f %6.0f\n", cl_timer * 1000000.0, sv_timer * 1000000.0);
 698
 699                 // if the accumulators haven't become positive yet, wait a while
 700                 if (cls.state == ca_dedicated)
 701                         wait = sv_timer * -1000000.0;
 702                 else if (!sv.active)
 703                         wait = cl_timer * -1000000.0;
 704                 else
 705                         wait = max(cl_timer, sv_timer) * -1000000.0;
 706                 wait = bound(0, wait, 100000);
 707
 708                 if (!cls.timedemo && wait >= 1)
 709                 {
 710                         double time0 = Sys_DoubleTime();
 711                         if (sv_checkforpacketsduringsleep.integer)
 712                                 NetConn_SleepMicroseconds((int)wait);
 713                         else
 714                                 Sys_Sleep((int)wait);
 715                         svs.perf_acc_sleeptime += Sys_DoubleTime() - time0;
 716                         continue;
 717                 }
 718
 719         //-------------------
 720         //
 721         // server operations
 722         //
 723         //-------------------
 724
 725                 // limit the frametime steps to no more than 100ms each
 726                 if (cl_timer > 0.1)
 727                         cl_timer = 0.1;
 728                 if (sv_timer > 0.1)
 729                 {
 730                         svs.perf_acc_lost += (sv_timer - 0.1);
 731                         sv_timer = 0.1;
 732                 }
 733
 734                 if (sv.active && sv_timer > 0)
 735                 {
 736                         // execute one or more server frames, with an upper limit on how much
 737                         // execution time to spend on server frames to avoid freezing the game if
 738                         // the server is overloaded, this execution time limit means the game will
 739                         // slow down if the server is taking too long.
 740                         int framecount, framelimit = 1;
 741                         double advancetime, aborttime = 0;
 742                         float offset;
 743
 744                         // run the world state
 745                         // don't allow simulation to run too fast or too slow or logic glitches can occur
 746
 747                         // stop running server frames if the wall time reaches this value
 748                         if (sys_ticrate.value <= 0)
 749                                 advancetime = sv_timer;
 750                         else if (cl.islocalgame && !sv_fixedframeratesingleplayer.integer)
 751                         {
 752                                 // synchronize to the client frametime, but no less than 10ms and no more than sys_ticrate
 753                                 advancetime = bound(0.01, cl_timer, sys_ticrate.value);
 754                                 framelimit = 10;
 755                                 aborttime = realtime + 0.1;
 756                         }
 757                         else
 758                         {
 759                                 advancetime = sys_ticrate.value;
 760                                 // listen servers can run multiple server frames per client frame
 761                                 if (cls.state == ca_connected)
 762                                 {
 763                                         framelimit = 10;
 764                                         aborttime = realtime + 0.1;
 765                                 }
 766                         }
 767                         advancetime = min(advancetime, 0.1);
 768
 769                         if(advancetime > 0)
 770                         {
 771                                 offset = sv_timer + (Sys_DoubleTime() - realtime);
 772                                 ++svs.perf_acc_offset_samples;
 773                                 svs.perf_acc_offset += offset;
 774                                 svs.perf_acc_offset_squared += offset * offset;
 775                                 if(svs.perf_acc_offset_max < offset)
 776                                         svs.perf_acc_offset_max = offset;
 777                         }
 778
 779                         // only advance time if not paused
 780                         // the game also pauses in singleplayer when menu or console is used
 781                         sv.frametime = advancetime * slowmo.value;
 782                         if (host_framerate.value)
 783                                 sv.frametime = host_framerate.value;
 784                         if (sv.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive)))
 785                                 sv.frametime = 0;
 786
 787                         // setup the VM frame
 788                         SV_VM_Begin();
 789
 790                         for (framecount = 0;framecount < framelimit && sv_timer > 0;framecount++)
 791                         {
 792                                 sv_timer -= advancetime;
 793
 794                                 // move things around and think unless paused
 795                                 if (sv.frametime)
 796                                         SV_Physics();
 797
 798                                 // if this server frame took too long, break out of the loop
 799                                 if (framelimit > 1 && Sys_DoubleTime() >= aborttime)
 800                                         break;
 801                         }
 802
 803                         // send all messages to the clients
 804                         SV_SendClientMessages();
 805
 806                         if (sv.paused == 1 && realtime > sv.pausedstart && sv.pausedstart > 0) {
 807                                 prog->globals.generic[OFS_PARM0] = realtime - sv.pausedstart;
 808                                 PRVM_ExecuteProgram(prog->funcoffsets.SV_PausedTic, "QC function SV_PausedTic is missing");
 809                         }
 810
 811                         // end the server VM frame
 812                         SV_VM_End();
 813
 814                         // send an heartbeat if enough time has passed since the last one
 815                         NetConn_Heartbeat(0);
 816                 }
 817
 818         //-------------------
 819         //
 820         // client operations
 821         //
 822         //-------------------
 823
 824                 if (cls.state != ca_dedicated && (cl_timer > 0 || cls.timedemo))
 825                 {
 826                         // decide the simulation time
 827                         if (cls.capturevideo.active)
 828                         {
 829                                 if (cls.capturevideo.realtime)
 830                                         clframetime = cl.realframetime = max(cl_timer, 1.0 / cls.capturevideo.framerate);
 831                                 else
 832                                 {
 833                                         clframetime = 1.0 / cls.capturevideo.framerate;
 834                                         cl.realframetime = max(cl_timer, clframetime);
 835                                 }
 836                         }
 837                         else if (vid_activewindow && cl_maxfps.value >= 1)
 838                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / cl_maxfps.value);
 839                         else if (!vid_activewindow && cl_maxidlefps.value >= 1)
 840                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / cl_maxidlefps.value);
 841                         else
 842                                 clframetime = cl.realframetime = cl_timer;
 843
 844                         // apply slowmo scaling
 845                         clframetime *= cl.movevars_timescale;
 846                         // scale playback speed of demos by slowmo cvar
 847                         if (cls.demoplayback)
 848                         {
 849                                 clframetime *= slowmo.value;
 850                                 // if demo playback is paused, don't advance time at all
 851                                 if (cls.demopaused)
 852                                         clframetime = 0;
 853                         }
 854
 855                         // host_framerate overrides all else
 856                         if (host_framerate.value)
 857                                 clframetime = host_framerate.value;
 858
 859                         if (cls.timedemo)
 860                                 clframetime = cl.realframetime = cl_timer;
 861
 862                         // deduct the frame time from the accumulator
 863                         cl_timer -= cl.realframetime;
 864
 865                         cl.oldtime = cl.time;
 866                         cl.time += clframetime;
 867
 868                         // Collect input into cmd
 869                         CL_Input();
 870
 871                         // check for new packets
 872                         NetConn_ClientFrame();
 873
 874                         // read a new frame from a demo if needed
 875                         CL_ReadDemoMessage();
 876
 877                         // now that packets have been read, send input to server
 878                         CL_SendMove();
 879
 880                         // update client world (interpolate entities, create trails, etc)
 881                         CL_UpdateWorld();
 882
 883                         // update video
 884                         if (host_speeds.integer)
 885                                 time1 = Sys_DoubleTime();
 886
 887                         CL_Video_Frame();
 888                         CL_Gecko_Frame();
 889
 890                         CL_UpdateScreen();
 891
 892                         if (host_speeds.integer)
 893                                 time2 = Sys_DoubleTime();
 894
 895                         // update audio
 896                         if(cl.csqc_usecsqclistener)
 897                         {
 898                                 S_Update(&cl.csqc_listenermatrix);
 899                                 cl.csqc_usecsqclistener = false;
 900                         }
 901                         else
 902                                 S_Update(&r_refdef.view.matrix);
 903
 904                         CDAudio_Update();
 905
 906                         if (host_speeds.integer)
 907                         {
 908                                 pass1 = (int)((time1 - time3)*1000000);
 909                                 time3 = Sys_DoubleTime();
 910                                 pass2 = (int)((time2 - time1)*1000000);
 911                                 pass3 = (int)((time3 - time2)*1000000);
 912                                 Con_Printf("%6ius total %6ius server %6ius gfx %6ius snd\n",
 913                                                         pass1+pass2+pass3, pass1, pass2, pass3);
 914                         }
 915                 }
 916
 917                 // if there is some time remaining from this frame, reset the timers
 918                 if (cl_timer >= 0)
 919                         cl_timer = 0;
 920                 if (sv_timer >= 0)
 921                 {
 922                         svs.perf_acc_lost += sv_timer;
 923                         sv_timer = 0;
 924                 }
 925
 926                 host_framecount++;
 927         }
 928 }
 929
 930 //============================================================================
 931
 932 qboolean vid_opened = false;
 933 void Host_StartVideo(void)
 934 {
 935         if (!vid_opened && cls.state != ca_dedicated)
 936         {
 937                 vid_opened = true;
 938                 // make sure we open sockets before opening video because the Windows Firewall "unblock?" dialog can screw up the graphics context on some graphics drivers
 939                 NetConn_UpdateSockets();
 940                 VID_Start();
 941                 CDAudio_Startup();
 942         }
 943 }
 944
 945 char engineversion[128];
 946
 947 qboolean sys_nostdout = false;
 948
 949 extern void Render_Init(void);
 950 extern void Mathlib_Init(void);
 951 extern void FS_Init(void);
 952 extern void FS_Shutdown(void);
 953 extern void PR_Cmd_Init(void);
 954 extern void COM_Init_Commands(void);
 955 extern void FS_Init_Commands(void);
 956 extern qboolean host_stuffcmdsrun;
 957
 958 /*
 959 ====================
 960 Host_Init
 961 ====================
 962 */
 963 static void Host_Init (void)
 964 {
 965         int i;
 966         const char* os;
 967
 968         if (COM_CheckParm("-profilegameonly"))
 969                 Sys_AllowProfiling(false);
 970
 971         // LordHavoc: quake never seeded the random number generator before... heh
 972         if (COM_CheckParm("-benchmark"))
 973                 srand(0); // predictable random sequence for -benchmark
 974         else
 975                 srand(time(NULL));
 976
 977         // FIXME: this is evil, but possibly temporary
 978 // COMMANDLINEOPTION: Console: -developer enables warnings and other notices (RECOMMENDED for mod developers)
 979         if (COM_CheckParm("-developer"))
 980         {
 981                 developer.value = developer.integer = 1;
 982                 developer.string = "1";
 983         }
 984
 985         if (COM_CheckParm("-developer2"))
 986         {
 987                 developer.value = developer.integer = 100;
 988                 developer.string = "100";
 989                 developer_memory.value = developer_memory.integer = 100;
 990                 developer.string = "100";
 991                 developer_memorydebug.value = developer_memorydebug.integer = 100;
 992                 developer_memorydebug.string = "100";
 993         }
 994
 995 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
 996         if (COM_CheckParm("-nostdout"))
 997                 sys_nostdout = 1;
 998
 999         // used by everything
1000         Memory_Init();
1001
1002         // initialize console command/cvar/alias/command execution systems
1003         Cmd_Init();
1004
1005         // initialize memory subsystem cvars/commands
1006         Memory_Init_Commands();
1007
1008         // initialize console and logging and its cvars/commands
1009         Con_Init();
1010
1011         // initialize various cvars that could not be initialized earlier
1012         Curl_Init_Commands();
1013         Cmd_Init_Commands();
1014         Sys_Init_Commands();
1015         COM_Init_Commands();
1016         FS_Init_Commands();
1017
1018         // initialize console window (only used by sys_win.c)
1019         Sys_InitConsole();
1020
1021         // detect gamemode from commandline options or executable name
1022         COM_InitGameType();
1023
1024         // construct a version string for the corner of the console
1025         os = DP_OS_NAME;
1026         dpsnprintf (engineversion, sizeof (engineversion), "%s %s %s", gamename, os, buildstring);
1027         Con_Printf("%s\n", engineversion);
1028
1029         // initialize ixtable
1030         Mathlib_Init();
1031
1032         // initialize filesystem (including fs_basedir, fs_gamedir, -game, scr_screenshot_name)
1033         FS_Init();
1034
1035         NetConn_Init();
1036         Curl_Init();
1037         //PR_Init();
1038         //PR_Cmd_Init();
1039         PRVM_Init();
1040         Mod_Init();
1041         World_Init();
1042         SV_Init();
1043         Host_InitCommands();
1044         Host_InitLocal();
1045         Host_ServerOptions();
1046
1047         if (cls.state == ca_dedicated)
1048                 Cmd_AddCommand ("disconnect", CL_Disconnect_f, "disconnect from server (or disconnect all clients if running a server)");
1049         else
1050         {
1051                 Con_DPrintf("Initializing client\n");
1052
1053                 R_Modules_Init();
1054                 Palette_Init();
1055                 MR_Init_Commands();
1056                 VID_Shared_Init();
1057                 VID_Init();
1058                 Render_Init();
1059                 S_Init();
1060                 CDAudio_Init();
1061                 Key_Init();
1062                 V_Init();
1063                 CL_Init();
1064         }
1065
1066         // set up the default startmap_sp and startmap_dm aliases (mods can
1067         // override these) and then execute the quake.rc startup script
1068         if (gamemode == GAME_NEHAHRA)
1069                 Cbuf_AddText("alias startmap_sp \"map nehstart\"\nalias startmap_dm \"map nehstart\"\nexec quake.rc\n");
1070         else if (gamemode == GAME_TRANSFUSION)
1071                 Cbuf_AddText("alias startmap_sp \"map e1m1\"\n""alias startmap_dm \"map bb1\"\nexec quake.rc\n");
1072         else if (gamemode == GAME_TEU)
1073                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec teu.rc\n");
1074         else
1075                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec quake.rc\n");
1076         Cbuf_Execute();
1077
1078         // if stuffcmds wasn't run, then quake.rc is probably missing, use default
1079         if (!host_stuffcmdsrun)
1080         {
1081                 Cbuf_AddText("exec default.cfg\nexec config.cfg\nexec autoexec.cfg\nstuffcmds\n");
1082                 Cbuf_Execute();
1083         }
1084
1085         // put up the loading image so the user doesn't stare at a black screen...
1086         SCR_BeginLoadingPlaque();
1087
1088         // FIXME: put this into some neat design, but the menu should be allowed to crash
1089         // without crashing the whole game, so this should just be a short-time solution
1090
1091         // here comes the not so critical stuff
1092         if (setjmp(host_abortframe)) {
1093                 return;
1094         }
1095
1096         if (cls.state != ca_dedicated)
1097         {
1098                 MR_Init();
1099         }
1100
1101         // check for special benchmark mode
1102 // 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)
1103         i = COM_CheckParm("-benchmark");
1104         if (i && i + 1 < com_argc)
1105         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1106         {
1107                 Cbuf_AddText(va("timedemo %s\n", com_argv[i + 1]));
1108                 Cbuf_Execute();
1109         }
1110
1111         // check for special demo mode
1112 // COMMANDLINEOPTION: Client: -demo <demoname> runs a playdemo and quits
1113         i = COM_CheckParm("-demo");
1114         if (i && i + 1 < com_argc)
1115         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1116         {
1117                 Cbuf_AddText(va("playdemo %s\n", com_argv[i + 1]));
1118                 Cbuf_Execute();
1119         }
1120
1121 // COMMANDLINEOPTION: Client: -capturedemo <demoname> captures a playdemo and quits
1122         i = COM_CheckParm("-capturedemo");
1123         if (i && i + 1 < com_argc)
1124         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1125         {
1126                 Cbuf_AddText(va("playdemo %s\ncl_capturevideo 1\n", com_argv[i + 1]));
1127                 Cbuf_Execute();
1128         }
1129
1130         if (cls.state == ca_dedicated || COM_CheckParm("-listen"))
1131         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1132         {
1133                 Cbuf_AddText("startmap_dm\n");
1134                 Cbuf_Execute();
1135         }
1136
1137         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1138         {
1139                 Cbuf_AddText("togglemenu\n");
1140                 Cbuf_Execute();
1141         }
1142
1143         Con_DPrint("========Initialized=========\n");
1144
1145         //Host_StartVideo();
1146 }
1147
1148
1149 /*
1150 ===============
1151 Host_Shutdown
1152
1153 FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
1154 to run quit through here before the final handoff to the sys code.
1155 ===============
1156 */
1157 void Host_Shutdown(void)
1158 {
1159         static qboolean isdown = false;
1160
1161         if (isdown)
1162         {
1163                 Con_Print("recursive shutdown\n");
1164                 return;
1165         }
1166         if (setjmp(host_abortframe))
1167         {
1168                 Con_Print("aborted the quitting frame?!?\n");
1169                 return;
1170         }
1171         isdown = true;
1172
1173         // be quiet while shutting down
1174         S_StopAllSounds();
1175
1176         // disconnect client from server if active
1177         CL_Disconnect();
1178
1179         // shut down local server if active
1180         Host_ShutdownServer ();
1181
1182         // Shutdown menu
1183         if(MR_Shutdown)
1184                 MR_Shutdown();
1185
1186         // AK shutdown PRVM
1187         // AK hmm, no PRVM_Shutdown(); yet
1188
1189         CL_Gecko_Shutdown();
1190         CL_Video_Shutdown();
1191
1192         Host_SaveConfig();
1193
1194         CDAudio_Shutdown ();
1195         S_Terminate ();
1196         Curl_Shutdown ();
1197         NetConn_Shutdown ();
1198         //PR_Shutdown ();
1199
1200         if (cls.state != ca_dedicated)
1201         {
1202                 R_Modules_Shutdown();
1203                 VID_Shutdown();
1204         }
1205
1206         Cmd_Shutdown();
1207         CL_Shutdown();
1208         Sys_Shutdown();
1209         Log_Close();
1210         FS_Shutdown();
1211         Memory_Shutdown();
1212 }
1213