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 <time.h>
  23 #include "quakedef.h"
  24 #include "libcurl.h"
  25 #include "cdaudio.h"
  26 #include "cl_video.h"
  27 #include "progsvm.h"
  28 #include "csprogs.h"
  29 #include "sv_demo.h"
  30
  31 /*
  32
  33 A server can always be started, even if the system started out as a client
  34 to a remote system.
  35
  36 A client can NOT be started if the system started as a dedicated server.
  37
  38 Memory is cleared / released when a server or client begins, not when they end.
  39
  40 */
  41
  42 // how many frames have occurred
  43 // (checked by Host_Error and Host_SaveConfig_f)
  44 int host_framecount = 0;
  45 // LordHavoc: set when quit is executed
  46 qboolean host_shuttingdown = false;
  47
  48 // the real time since application started, without any slowmo or clamping
  49 double realtime;
  50
  51 // current client
  52 client_t *host_client;
  53
  54 jmp_buf host_abortframe;
  55
  56 // pretend frames take this amount of time (in seconds), 0 = realtime
  57 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"};
  58 // shows time used by certain subsystems
  59 cvar_t host_speeds = {0, "host_speeds","0", "reports how much time is used in server/graphics/sound"};
  60 // LordHavoc: framerate upper cap
  61 cvar_t cl_maxfps = {CVAR_SAVE, "cl_maxfps", "1000", "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)"};
  62 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"};
  63
  64 cvar_t developer = {0, "developer","0", "prints additional debugging messages and information (recommended for modders and level designers)"};
  65 cvar_t developer_entityparsing = {0, "developer_entityparsing", "0", "prints detailed network entities information each time a packet is received"};
  66
  67 cvar_t timestamps = {CVAR_SAVE, "timestamps", "0", "prints timestamps on console messages"};
  68 cvar_t timeformat = {CVAR_SAVE, "timeformat", "[%Y-%m-%d %H:%M:%S] ", "time format to use on timestamped console messages"};
  69
  70 /*
  71 ================
  72 Host_AbortCurrentFrame
  73
  74 aborts the current host frame and goes on with the next one
  75 ================
  76 */
  77 void Host_AbortCurrentFrame(void)
  78 {
  79         longjmp (host_abortframe, 1);
  80 }
  81
  82 /*
  83 ================
  84 Host_Error
  85
  86 This shuts down both the client and server
  87 ================
  88 */
  89 void Host_Error (const char *error, ...)
  90 {
  91         static char hosterrorstring1[MAX_INPUTLINE];
  92         static char hosterrorstring2[MAX_INPUTLINE];
  93         static qboolean hosterror = false;
  94         va_list argptr;
  95
  96         // turn off rcon redirect if it was active when the crash occurred
  97         rcon_redirect = false;
  98
  99         va_start (argptr,error);
 100         dpvsnprintf (hosterrorstring1,sizeof(hosterrorstring1),error,argptr);
 101         va_end (argptr);
 102
 103         Con_Printf("Host_Error: %s\n", hosterrorstring1);
 104
 105         // LordHavoc: if crashing very early, or currently shutting down, do
 106         // Sys_Error instead
 107         if (host_framecount < 3 || host_shuttingdown)
 108                 Sys_Error ("Host_Error: %s", hosterrorstring1);
 109
 110         if (hosterror)
 111                 Sys_Error ("Host_Error: recursively entered (original error was: %s    new error is: %s)", hosterrorstring2, hosterrorstring1);
 112         hosterror = true;
 113
 114         strlcpy(hosterrorstring2, hosterrorstring1, sizeof(hosterrorstring2));
 115
 116         CL_Parse_DumpPacket();
 117
 118         CL_Parse_ErrorCleanUp();
 119
 120         //PR_Crash();
 121
 122         // print out where the crash happened, if it was caused by QC (and do a cleanup)
 123         PRVM_Crash();
 124
 125
 126         Host_ShutdownServer ();
 127
 128         if (cls.state == ca_dedicated)
 129                 Sys_Error ("Host_Error: %s",hosterrorstring2);  // dedicated servers exit
 130
 131         CL_Disconnect ();
 132         cls.demonum = -1;
 133
 134         hosterror = false;
 135
 136         Host_AbortCurrentFrame();
 137 }
 138
 139 void Host_ServerOptions (void)
 140 {
 141         int i;
 142
 143         // general default
 144         svs.maxclients = 8;
 145
 146 // COMMANDLINEOPTION: Server: -dedicated [playerlimit] starts a dedicated server (with a command console), default playerlimit is 8
 147 // COMMANDLINEOPTION: Server: -listen [playerlimit] starts a multiplayer server with graphical client, like singleplayer but other players can connect, default playerlimit is 8
 148         // if no client is in the executable or -dedicated is specified on
 149         // commandline, start a dedicated server
 150         i = COM_CheckParm ("-dedicated");
 151         if (i || !cl_available)
 152         {
 153                 cls.state = ca_dedicated;
 154                 // check for -dedicated specifying how many players
 155                 if (i && i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
 156                         svs.maxclients = atoi (com_argv[i+1]);
 157                 if (COM_CheckParm ("-listen"))
 158                         Con_Printf ("Only one of -dedicated or -listen can be specified\n");
 159                 // default sv_public on for dedicated servers (often hosted by serious administrators), off for listen servers (often hosted by clueless users)
 160                 Cvar_SetValue("sv_public", 1);
 161         }
 162         else if (cl_available)
 163         {
 164                 // client exists and not dedicated, check if -listen is specified
 165                 cls.state = ca_disconnected;
 166                 i = COM_CheckParm ("-listen");
 167                 if (i)
 168                 {
 169                         // default players unless specified
 170                         if (i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
 171                                 svs.maxclients = atoi (com_argv[i+1]);
 172                 }
 173                 else
 174                 {
 175                         // default players in some games, singleplayer in most
 176                         if (gamemode != GAME_GOODVSBAD2 && gamemode != GAME_NEXUIZ && gamemode != GAME_BATTLEMECH)
 177                                 svs.maxclients = 1;
 178                 }
 179         }
 180
 181         svs.maxclients = bound(1, svs.maxclients, MAX_SCOREBOARD);
 182
 183         svs.clients = (client_t *)Mem_Alloc(sv_mempool, sizeof(client_t) * svs.maxclients);
 184
 185         if (svs.maxclients > 1 && !deathmatch.integer && !coop.integer)
 186                 Cvar_SetValueQuick(&deathmatch, 1);
 187 }
 188
 189 /*
 190 =======================
 191 Host_InitLocal
 192 ======================
 193 */
 194 void Host_SaveConfig_f(void);
 195 void Host_LoadConfig_f(void);
 196 static void Host_InitLocal (void)
 197 {
 198         Cmd_AddCommand("saveconfig", Host_SaveConfig_f, "save settings to config.cfg immediately (also automatic when quitting)");
 199         Cmd_AddCommand("loadconfig", Host_LoadConfig_f, "reset everything and reload configs");
 200
 201         Cvar_RegisterVariable (&host_framerate);
 202         Cvar_RegisterVariable (&host_speeds);
 203         Cvar_RegisterVariable (&cl_maxfps);
 204         Cvar_RegisterVariable (&cl_maxidlefps);
 205
 206         Cvar_RegisterVariable (&developer);
 207         Cvar_RegisterVariable (&developer_entityparsing);
 208
 209         Cvar_RegisterVariable (&timestamps);
 210         Cvar_RegisterVariable (&timeformat);
 211 }
 212
 213
 214 /*
 215 ===============
 216 Host_SaveConfig_f
 217
 218 Writes key bindings and archived cvars to config.cfg
 219 ===============
 220 */
 221 void Host_SaveConfig_f(void)
 222 {
 223         qfile_t *f;
 224
 225 // dedicated servers initialize the host but don't parse and set the
 226 // config.cfg cvars
 227         // LordHavoc: don't save a config if it crashed in startup
 228         if (host_framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
 229         {
 230                 f = FS_Open ("config.cfg", "wb", false, false);
 231                 if (!f)
 232                 {
 233                         Con_Print("Couldn't write config.cfg.\n");
 234                         return;
 235                 }
 236
 237                 Key_WriteBindings (f);
 238                 Cvar_WriteVariables (f);
 239
 240                 FS_Close (f);
 241         }
 242 }
 243
 244
 245 /*
 246 ===============
 247 Host_LoadConfig_f
 248
 249 Resets key bindings and cvars to defaults and then reloads scripts
 250 ===============
 251 */
 252 void Host_LoadConfig_f(void)
 253 {
 254         // unlock the cvar default strings so they can be updated by the new default.cfg
 255         Cvar_UnlockDefaults();
 256         // reset cvars to their defaults, and then exec startup scripts again
 257         Cbuf_InsertText("cvar_resettodefaults_all;exec quake.rc\n");
 258 }
 259
 260 /*
 261 =================
 262 SV_ClientPrint
 263
 264 Sends text across to be displayed
 265 FIXME: make this just a stuffed echo?
 266 =================
 267 */
 268 void SV_ClientPrint(const char *msg)
 269 {
 270         if (host_client->netconnection)
 271         {
 272                 MSG_WriteByte(&host_client->netconnection->message, svc_print);
 273                 MSG_WriteString(&host_client->netconnection->message, msg);
 274         }
 275 }
 276
 277 /*
 278 =================
 279 SV_ClientPrintf
 280
 281 Sends text across to be displayed
 282 FIXME: make this just a stuffed echo?
 283 =================
 284 */
 285 void SV_ClientPrintf(const char *fmt, ...)
 286 {
 287         va_list argptr;
 288         char msg[MAX_INPUTLINE];
 289
 290         va_start(argptr,fmt);
 291         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
 292         va_end(argptr);
 293
 294         SV_ClientPrint(msg);
 295 }
 296
 297 /*
 298 =================
 299 SV_BroadcastPrint
 300
 301 Sends text to all active clients
 302 =================
 303 */
 304 void SV_BroadcastPrint(const char *msg)
 305 {
 306         int i;
 307         client_t *client;
 308
 309         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
 310         {
 311                 if (client->active && client->netconnection)
 312                 {
 313                         MSG_WriteByte(&client->netconnection->message, svc_print);
 314                         MSG_WriteString(&client->netconnection->message, msg);
 315                 }
 316         }
 317
 318         if (sv_echobprint.integer && cls.state == ca_dedicated)
 319                 Con_Print(msg);
 320 }
 321
 322 /*
 323 =================
 324 SV_BroadcastPrintf
 325
 326 Sends text to all active clients
 327 =================
 328 */
 329 void SV_BroadcastPrintf(const char *fmt, ...)
 330 {
 331         va_list argptr;
 332         char msg[MAX_INPUTLINE];
 333
 334         va_start(argptr,fmt);
 335         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
 336         va_end(argptr);
 337
 338         SV_BroadcastPrint(msg);
 339 }
 340
 341 /*
 342 =================
 343 Host_ClientCommands
 344
 345 Send text over to the client to be executed
 346 =================
 347 */
 348 void Host_ClientCommands(const char *fmt, ...)
 349 {
 350         va_list argptr;
 351         char string[MAX_INPUTLINE];
 352
 353         if (!host_client->netconnection)
 354                 return;
 355
 356         va_start(argptr,fmt);
 357         dpvsnprintf(string, sizeof(string), fmt, argptr);
 358         va_end(argptr);
 359
 360         MSG_WriteByte(&host_client->netconnection->message, svc_stufftext);
 361         MSG_WriteString(&host_client->netconnection->message, string);
 362 }
 363
 364 /*
 365 =====================
 366 SV_DropClient
 367
 368 Called when the player is getting totally kicked off the host
 369 if (crash = true), don't bother sending signofs
 370 =====================
 371 */
 372 void SV_DropClient(qboolean crash)
 373 {
 374         int i;
 375         Con_Printf("Client \"%s\" dropped\n", host_client->name);
 376
 377         SV_StopDemoRecording(host_client);
 378
 379         // make sure edict is not corrupt (from a level change for example)
 380         host_client->edict = PRVM_EDICT_NUM(host_client - svs.clients + 1);
 381
 382         if (host_client->netconnection)
 383         {
 384                 // free the client (the body stays around)
 385                 if (!crash)
 386                 {
 387                         // LordHavoc: no opportunity for resending, so use unreliable 3 times
 388                         unsigned char bufdata[8];
 389                         sizebuf_t buf;
 390                         memset(&buf, 0, sizeof(buf));
 391                         buf.data = bufdata;
 392                         buf.maxsize = sizeof(bufdata);
 393                         MSG_WriteByte(&buf, svc_disconnect);
 394                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 395                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 396                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 397                 }
 398                 // break the net connection
 399                 NetConn_Close(host_client->netconnection);
 400                 host_client->netconnection = NULL;
 401         }
 402
 403         // call qc ClientDisconnect function
 404         // LordHavoc: don't call QC if server is dead (avoids recursive
 405         // Host_Error in some mods when they run out of edicts)
 406         if (host_client->clientconnectcalled && sv.active && host_client->edict)
 407         {
 408                 // call the prog function for removing a client
 409                 // this will set the body to a dead frame, among other things
 410                 int saveSelf = prog->globals.server->self;
 411                 host_client->clientconnectcalled = false;
 412                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
 413                 PRVM_ExecuteProgram(prog->globals.server->ClientDisconnect, "QC function ClientDisconnect is missing");
 414                 prog->globals.server->self = saveSelf;
 415         }
 416
 417         // if a download is active, close it
 418         if (host_client->download_file)
 419         {
 420                 Con_DPrintf("Download of %s aborted when %s dropped\n", host_client->download_name, host_client->name);
 421                 FS_Close(host_client->download_file);
 422                 host_client->download_file = NULL;
 423                 host_client->download_name[0] = 0;
 424                 host_client->download_expectedposition = 0;
 425                 host_client->download_started = false;
 426         }
 427
 428         // remove leaving player from scoreboard
 429         host_client->name[0] = 0;
 430         host_client->colors = 0;
 431         host_client->frags = 0;
 432         // send notification to all clients
 433         // get number of client manually just to make sure we get it right...
 434         i = host_client - svs.clients;
 435         MSG_WriteByte (&sv.reliable_datagram, svc_updatename);
 436         MSG_WriteByte (&sv.reliable_datagram, i);
 437         MSG_WriteString (&sv.reliable_datagram, host_client->name);
 438         MSG_WriteByte (&sv.reliable_datagram, svc_updatecolors);
 439         MSG_WriteByte (&sv.reliable_datagram, i);
 440         MSG_WriteByte (&sv.reliable_datagram, host_client->colors);
 441         MSG_WriteByte (&sv.reliable_datagram, svc_updatefrags);
 442         MSG_WriteByte (&sv.reliable_datagram, i);
 443         MSG_WriteShort (&sv.reliable_datagram, host_client->frags);
 444
 445         // free the client now
 446         if (host_client->entitydatabase)
 447                 EntityFrame_FreeDatabase(host_client->entitydatabase);
 448         if (host_client->entitydatabase4)
 449                 EntityFrame4_FreeDatabase(host_client->entitydatabase4);
 450         if (host_client->entitydatabase5)
 451                 EntityFrame5_FreeDatabase(host_client->entitydatabase5);
 452
 453         if (sv.active)
 454         {
 455                 // clear a fields that matter to DP_SV_CLIENTNAME and DP_SV_CLIENTCOLORS, and also frags
 456                 PRVM_ED_ClearEdict(host_client->edict);
 457         }
 458
 459         // clear the client struct (this sets active to false)
 460         memset(host_client, 0, sizeof(*host_client));
 461
 462         // update server listing on the master because player count changed
 463         // (which the master uses for filtering empty/full servers)
 464         NetConn_Heartbeat(1);
 465
 466         if (sv.loadgame)
 467         {
 468                 for (i = 0;i < svs.maxclients;i++)
 469                         if (svs.clients[i].active && !svs.clients[i].spawned)
 470                                 break;
 471                 if (i == svs.maxclients)
 472                 {
 473                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
 474                         sv.paused = sv.loadgame = false; // we're basically done with loading now
 475                 }
 476         }
 477 }
 478
 479 /*
 480 ==================
 481 Host_ShutdownServer
 482
 483 This only happens at the end of a game, not between levels
 484 ==================
 485 */
 486 void Host_ShutdownServer(void)
 487 {
 488         int i;
 489
 490         Con_DPrintf("Host_ShutdownServer\n");
 491
 492         if (!sv.active)
 493                 return;
 494
 495         NetConn_Heartbeat(2);
 496         NetConn_Heartbeat(2);
 497
 498 // make sure all the clients know we're disconnecting
 499         SV_VM_Begin();
 500         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
 501                 if (host_client->active)
 502                         SV_DropClient(false); // server shutdown
 503         SV_VM_End();
 504
 505         NetConn_CloseServerPorts();
 506
 507         sv.active = false;
 508 //
 509 // clear structures
 510 //
 511         memset(&sv, 0, sizeof(sv));
 512         memset(svs.clients, 0, svs.maxclients*sizeof(client_t));
 513 }
 514
 515
 516 //============================================================================
 517
 518 /*
 519 ===================
 520 Host_GetConsoleCommands
 521
 522 Add them exactly as if they had been typed at the console
 523 ===================
 524 */
 525 void Host_GetConsoleCommands (void)
 526 {
 527         char *cmd;
 528
 529         while (1)
 530         {
 531                 cmd = Sys_ConsoleInput ();
 532                 if (!cmd)
 533                         break;
 534                 Cbuf_AddText (cmd);
 535         }
 536 }
 537
 538 /*
 539 ==================
 540 Host_TimeReport
 541
 542 Returns a time report string, for example for
 543 ==================
 544 */
 545 const char *Host_TimingReport()
 546 {
 547         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);
 548 }
 549
 550 /*
 551 ==================
 552 Host_Frame
 553
 554 Runs all active servers
 555 ==================
 556 */
 557 static void Host_Init(void);
 558 void Host_Main(void)
 559 {
 560         double time1 = 0;
 561         double time2 = 0;
 562         double time3 = 0;
 563         double cl_timer, sv_timer;
 564         double clframetime, deltarealtime, oldrealtime;
 565         double wait;
 566         int pass1, pass2, pass3, i;
 567
 568         Host_Init();
 569
 570         cl_timer = 0;
 571         sv_timer = 0;
 572
 573         realtime = Sys_DoubleTime();
 574         for (;;)
 575         {
 576                 if (setjmp(host_abortframe))
 577                         continue;                       // something bad happened, or the server disconnected
 578
 579                 oldrealtime = realtime;
 580                 realtime = Sys_DoubleTime();
 581
 582                 deltarealtime = realtime - oldrealtime;
 583                 cl_timer += deltarealtime;
 584                 sv_timer += deltarealtime;
 585
 586                 svs.perf_acc_realtime += deltarealtime;
 587
 588                 // Look for clients who have spawned
 589                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
 590                         if(host_client->spawned)
 591                                 if(host_client->netconnection)
 592                                         break;
 593                 if(i == svs.maxclients)
 594                 {
 595                         // Nobody is looking? Then we won't do timing...
 596                         // Instead, reset it to zero
 597                         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;
 598                 }
 599                 else if(svs.perf_acc_realtime > 5)
 600                 {
 601                         svs.perf_cpuload = 1 - svs.perf_acc_sleeptime / svs.perf_acc_realtime;
 602                         svs.perf_lost = svs.perf_acc_lost / svs.perf_acc_realtime;
 603                         if(svs.perf_acc_offset_samples > 0)
 604                         {
 605                                 svs.perf_offset_max = svs.perf_acc_offset_max;
 606                                 svs.perf_offset_avg = svs.perf_acc_offset / svs.perf_acc_offset_samples;
 607                                 svs.perf_offset_sdev = sqrt(svs.perf_acc_offset_squared / svs.perf_acc_offset_samples - svs.perf_offset_avg * svs.perf_offset_avg);
 608                         }
 609                         if(svs.perf_lost > 0)
 610                                 Con_DPrintf("Server can't keep up: %s\n", Host_TimingReport());
 611                         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;
 612                 }
 613
 614                 if (slowmo.value < 0.00001 && slowmo.value != 0)
 615                         Cvar_SetValue("slowmo", 0);
 616                 if (host_framerate.value < 0.00001 && host_framerate.value != 0)
 617                         Cvar_SetValue("host_framerate", 0);
 618
 619                 // keep the random time dependent, but not when playing demos/benchmarking
 620                 if(!*sv_random_seed.string && !cls.demoplayback)
 621                         rand();
 622
 623                 cl.islocalgame = NetConn_IsLocalGame();
 624
 625                 // get new key events
 626                 Sys_SendKeyEvents();
 627
 628                 NetConn_UpdateSockets();
 629
 630                 Log_DestBuffer_Flush();
 631
 632                 // receive packets on each main loop iteration, as the main loop may
 633                 // be undersleeping due to select() detecting a new packet
 634                 if (sv.active)
 635                         NetConn_ServerFrame();
 636
 637                 Curl_Run();
 638
 639                 // check for commands typed to the host
 640                 Host_GetConsoleCommands();
 641
 642                 // when a server is running we only execute console commands on server frames
 643                 // (this mainly allows frikbot .way config files to work properly by staying in sync with the server qc)
 644                 // otherwise we execute them on all frames
 645                 if (sv_timer > 0 || !sv.active)
 646                 {
 647                         // process console commands
 648                         Cbuf_Execute();
 649                 }
 650
 651                 //Con_Printf("%6.0f %6.0f\n", cl_timer * 1000000.0, sv_timer * 1000000.0);
 652
 653                 // if the accumulators haven't become positive yet, wait a while
 654                 if (cls.state == ca_dedicated)
 655                         wait = sv_timer * -1000000.0;
 656                 else if (!sv.active)
 657                         wait = cl_timer * -1000000.0;
 658                 else
 659                         wait = max(cl_timer, sv_timer) * -1000000.0;
 660                 if (wait > 100000)
 661                         wait = 100000;
 662
 663                 if (!cls.timedemo && wait > 0)
 664                 {
 665                         double time0 = Sys_DoubleTime();
 666                         if (sv_checkforpacketsduringsleep.integer)
 667                         {
 668                                 if (wait >= 1)
 669                                         NetConn_SleepMicroseconds((int)wait);
 670                         }
 671                         else
 672                         {
 673                                 if (wait >= 1000)
 674                                         Sys_Sleep((int)wait / 1000);
 675                         }
 676                         svs.perf_acc_sleeptime += Sys_DoubleTime() - time0;
 677                         continue;
 678                 }
 679
 680         //-------------------
 681         //
 682         // server operations
 683         //
 684         //-------------------
 685
 686                 // limit the frametime steps to no more than 100ms each
 687                 if (cl_timer > 0.1)
 688                         cl_timer = 0.1;
 689                 if (sv_timer > 0.1)
 690                 {
 691                         svs.perf_acc_lost += (sv_timer - 0.1);
 692                         sv_timer = 0.1;
 693                 }
 694
 695                 if (sv.active && sv_timer > 0)
 696                 {
 697                         // execute one or more server frames, with an upper limit on how much
 698                         // execution time to spend on server frames to avoid freezing the game if
 699                         // the server is overloaded, this execution time limit means the game will
 700                         // slow down if the server is taking too long.
 701                         int framecount, framelimit = 1;
 702                         double advancetime, aborttime = 0;
 703                         float offset;
 704
 705                         // run the world state
 706                         // don't allow simulation to run too fast or too slow or logic glitches can occur
 707
 708                         // stop running server frames if the wall time reaches this value
 709                         if (sys_ticrate.value <= 0)
 710                                 advancetime = sv_timer;
 711                         else if (cl.islocalgame && !sv_fixedframeratesingleplayer.integer)
 712                         {
 713                                 // synchronize to the client frametime, but no less than 10ms and no more than sys_ticrate
 714                                 advancetime = bound(0.01, cl_timer, sys_ticrate.value);
 715                                 framelimit = 10;
 716                                 aborttime = realtime + 0.1;
 717                         }
 718                         else
 719                         {
 720                                 advancetime = sys_ticrate.value;
 721                                 // listen servers can run multiple server frames per client frame
 722                                 if (cls.state == ca_connected)
 723                                 {
 724                                         framelimit = 10;
 725                                         aborttime = realtime + 0.1;
 726                                 }
 727                         }
 728                         advancetime = min(advancetime, 0.1);
 729
 730                         if(advancetime > 0)
 731                         {
 732                                 offset = sv_timer + (Sys_DoubleTime() - realtime);
 733                                 ++svs.perf_acc_offset_samples;
 734                                 svs.perf_acc_offset += offset;
 735                                 svs.perf_acc_offset_squared += offset * offset;
 736                                 if(svs.perf_acc_offset_max < offset)
 737                                         svs.perf_acc_offset_max = offset;
 738                         }
 739
 740                         // only advance time if not paused
 741                         // the game also pauses in singleplayer when menu or console is used
 742                         sv.frametime = advancetime * slowmo.value;
 743                         if (host_framerate.value)
 744                                 sv.frametime = host_framerate.value;
 745                         if (sv.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive)))
 746                                 sv.frametime = 0;
 747
 748                         // setup the VM frame
 749                         SV_VM_Begin();
 750
 751                         for (framecount = 0;framecount < framelimit && sv_timer > 0;framecount++)
 752                         {
 753                                 sv_timer -= advancetime;
 754
 755                                 // move things around and think unless paused
 756                                 if (sv.frametime)
 757                                         SV_Physics();
 758
 759                                 // if this server frame took too long, break out of the loop
 760                                 if (framelimit > 1 && Sys_DoubleTime() >= aborttime)
 761                                         break;
 762                         }
 763
 764                         // send all messages to the clients
 765                         SV_SendClientMessages();
 766
 767                         // end the server VM frame
 768                         SV_VM_End();
 769
 770                         // send an heartbeat if enough time has passed since the last one
 771                         NetConn_Heartbeat(0);
 772                 }
 773
 774         //-------------------
 775         //
 776         // client operations
 777         //
 778         //-------------------
 779
 780                 if (cls.state != ca_dedicated && (cl_timer > 0 || cls.timedemo))
 781                 {
 782                         // decide the simulation time
 783                         if (cls.capturevideo.active)
 784                         {
 785                                 if (cls.capturevideo.realtime)
 786                                         clframetime = cl.realframetime = max(cl_timer, 1.0 / cls.capturevideo.framerate);
 787                                 else
 788                                 {
 789                                         clframetime = 1.0 / cls.capturevideo.framerate;
 790                                         cl.realframetime = max(cl_timer, clframetime);
 791                                 }
 792                         }
 793                         else if (vid_activewindow)
 794                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxfps.value));
 795                         else
 796                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxidlefps.value));
 797
 798                         // apply slowmo scaling
 799                         clframetime *= cl.movevars_timescale;
 800                         // scale playback speed of demos by slowmo cvar
 801                         if (cls.demoplayback)
 802                         {
 803                                 clframetime *= slowmo.value;
 804                                 // if demo playback is paused, don't advance time at all
 805                                 if (cls.demopaused)
 806                                         clframetime = 0;
 807                         }
 808
 809                         // host_framerate overrides all else
 810                         if (host_framerate.value)
 811                                 clframetime = host_framerate.value;
 812
 813                         if (cls.timedemo)
 814                                 clframetime = cl.realframetime = cl_timer;
 815
 816                         // deduct the frame time from the accumulator
 817                         cl_timer -= cl.realframetime;
 818
 819                         cl.oldtime = cl.time;
 820                         cl.time += clframetime;
 821
 822                         // Collect input into cmd
 823                         CL_Input();
 824
 825                         // check for new packets
 826                         NetConn_ClientFrame();
 827
 828                         // read a new frame from a demo if needed
 829                         CL_ReadDemoMessage();
 830
 831                         // now that packets have been read, send input to server
 832                         CL_SendMove();
 833
 834                         // update client world (interpolate entities, create trails, etc)
 835                         CL_UpdateWorld();
 836
 837                         // update video
 838                         if (host_speeds.integer)
 839                                 time1 = Sys_DoubleTime();
 840
 841                         //ui_update();
 842
 843                         CL_VideoFrame();
 844
 845                         CL_UpdateScreen();
 846
 847                         if (host_speeds.integer)
 848                                 time2 = Sys_DoubleTime();
 849
 850                         // update audio
 851                         if(cl.csqc_usecsqclistener)
 852                         {
 853                                 S_Update(&cl.csqc_listenermatrix);
 854                                 cl.csqc_usecsqclistener = false;
 855                         }
 856                         else
 857                                 S_Update(&r_view.matrix);
 858
 859                         CDAudio_Update();
 860
 861                         if (host_speeds.integer)
 862                         {
 863                                 pass1 = (int)((time1 - time3)*1000000);
 864                                 time3 = Sys_DoubleTime();
 865                                 pass2 = (int)((time2 - time1)*1000000);
 866                                 pass3 = (int)((time3 - time2)*1000000);
 867                                 Con_Printf("%6ius total %6ius server %6ius gfx %6ius snd\n",
 868                                                         pass1+pass2+pass3, pass1, pass2, pass3);
 869                         }
 870                 }
 871
 872                 // if there is some time remaining from this frame, reset the timers
 873                 if (cl_timer >= 0)
 874                         cl_timer = 0;
 875                 if (sv_timer >= 0)
 876                 {
 877                         svs.perf_acc_lost += sv_timer;
 878                         sv_timer = 0;
 879                 }
 880
 881                 host_framecount++;
 882         }
 883 }
 884
 885 //============================================================================
 886
 887 qboolean vid_opened = false;
 888 void Host_StartVideo(void)
 889 {
 890         if (!vid_opened && cls.state != ca_dedicated)
 891         {
 892                 vid_opened = true;
 893                 VID_Start();
 894                 CDAudio_Startup();
 895         }
 896 }
 897
 898 char engineversion[128];
 899
 900 qboolean sys_nostdout = false;
 901
 902 extern void Render_Init(void);
 903 extern void Mathlib_Init(void);
 904 extern void FS_Init(void);
 905 extern void FS_Shutdown(void);
 906 extern void PR_Cmd_Init(void);
 907 extern void COM_Init_Commands(void);
 908 extern void FS_Init_Commands(void);
 909 extern qboolean host_stuffcmdsrun;
 910
 911 /*
 912 ====================
 913 Host_Init
 914 ====================
 915 */
 916 static void Host_Init (void)
 917 {
 918         int i;
 919         const char* os;
 920
 921         // LordHavoc: quake never seeded the random number generator before... heh
 922         if (COM_CheckParm("-benchmark"))
 923                 srand(0); // predictable random sequence for -benchmark
 924         else
 925                 srand(time(NULL));
 926
 927         // FIXME: this is evil, but possibly temporary
 928 // COMMANDLINEOPTION: Console: -developer enables warnings and other notices (RECOMMENDED for mod developers)
 929         if (COM_CheckParm("-developer"))
 930         {
 931                 developer.value = developer.integer = 100;
 932                 developer.string = "100";
 933         }
 934
 935         if (COM_CheckParm("-developer2"))
 936         {
 937                 developer.value = developer.integer = 100;
 938                 developer.string = "100";
 939                 developer_memory.value = developer_memory.integer = 100;
 940                 developer.string = "100";
 941                 developer_memorydebug.value = developer_memorydebug.integer = 100;
 942                 developer_memorydebug.string = "100";
 943         }
 944
 945 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
 946         if (COM_CheckParm("-nostdout"))
 947                 sys_nostdout = 1;
 948
 949         // used by everything
 950         Memory_Init();
 951
 952         // initialize console command/cvar/alias/command execution systems
 953         Cmd_Init();
 954
 955         // initialize memory subsystem cvars/commands
 956         Memory_Init_Commands();
 957
 958         // initialize console and logging and its cvars/commands
 959         Con_Init();
 960
 961         // initialize various cvars that could not be initialized earlier
 962         Curl_Init_Commands();
 963         Cmd_Init_Commands();
 964         Sys_Init_Commands();
 965         COM_Init_Commands();
 966         FS_Init_Commands();
 967
 968         // initialize console window (only used by sys_win.c)
 969         Sys_InitConsole();
 970
 971         // detect gamemode from commandline options or executable name
 972         COM_InitGameType();
 973
 974         // construct a version string for the corner of the console
 975 #if defined(__linux__)
 976         os = "Linux";
 977 #elif defined(WIN32)
 978         os = "Windows";
 979 #elif defined(__FreeBSD__)
 980         os = "FreeBSD";
 981 #elif defined(__NetBSD__)
 982         os = "NetBSD";
 983 #elif defined(__OpenBSD__)
 984         os = "OpenBSD";
 985 #elif defined(MACOSX)
 986         os = "Mac OS X";
 987 #elif defined(__MORPHOS__)
 988         os = "MorphOS";
 989 #else
 990         os = "Unknown";
 991 #endif
 992         dpsnprintf (engineversion, sizeof (engineversion), "%s %s %s", gamename, os, buildstring);
 993         Con_Printf("%s\n", engineversion);
 994
 995         // initialize ixtable
 996         Mathlib_Init();
 997
 998         // initialize filesystem (including fs_basedir, fs_gamedir, -game, scr_screenshot_name)
 999         FS_Init();
1000
1001         NetConn_Init();
1002         Curl_Init();
1003         //PR_Init();
1004         //PR_Cmd_Init();
1005         PRVM_Init();
1006         Mod_Init();
1007         World_Init();
1008         SV_Init();
1009         Host_InitCommands();
1010         Host_InitLocal();
1011         Host_ServerOptions();
1012
1013         if (cls.state != ca_dedicated)
1014         {
1015                 Con_Printf("Initializing client\n");
1016
1017                 R_Modules_Init();
1018                 Palette_Init();
1019                 MR_Init_Commands();
1020                 VID_Shared_Init();
1021                 VID_Init();
1022                 Render_Init();
1023                 S_Init();
1024                 CDAudio_Init();
1025                 Key_Init();
1026                 V_Init();
1027                 CL_Init();
1028         }
1029
1030         // set up the default startmap_sp and startmap_dm aliases (mods can
1031         // override these) and then execute the quake.rc startup script
1032         if (gamemode == GAME_NEHAHRA)
1033                 Cbuf_AddText("alias startmap_sp \"map nehstart\"\nalias startmap_dm \"map nehstart\"\nexec quake.rc\n");
1034         else if (gamemode == GAME_TRANSFUSION)
1035                 Cbuf_AddText("alias startmap_sp \"map e1m1\"\n""alias startmap_dm \"map bb1\"\nexec quake.rc\n");
1036         else if (gamemode == GAME_TEU)
1037                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec teu.rc\n");
1038         else
1039                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec quake.rc\n");
1040         Cbuf_Execute();
1041
1042         // if stuffcmds wasn't run, then quake.rc is probably missing, use default
1043         if (!host_stuffcmdsrun)
1044         {
1045                 Cbuf_AddText("exec default.cfg\nexec config.cfg\nexec autoexec.cfg\nstuffcmds\n");
1046                 Cbuf_Execute();
1047         }
1048
1049         // put up the loading image so the user doesn't stare at a black screen...
1050         SCR_BeginLoadingPlaque();
1051
1052         // FIXME: put this into some neat design, but the menu should be allowed to crash
1053         // without crashing the whole game, so this should just be a short-time solution
1054
1055         // here comes the not so critical stuff
1056         if (setjmp(host_abortframe)) {
1057                 return;
1058         }
1059
1060         if (cls.state != ca_dedicated)
1061         {
1062                 MR_Init();
1063         }
1064
1065         // check for special benchmark mode
1066 // 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)
1067         i = COM_CheckParm("-benchmark");
1068         if (i && i + 1 < com_argc)
1069         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1070         {
1071                 Cbuf_AddText(va("timedemo %s\n", com_argv[i + 1]));
1072                 Cbuf_Execute();
1073         }
1074
1075         // check for special demo mode
1076 // COMMANDLINEOPTION: Client: -demo <demoname> runs a playdemo and quits
1077         i = COM_CheckParm("-demo");
1078         if (i && i + 1 < com_argc)
1079         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1080         {
1081                 Cbuf_AddText(va("playdemo %s\n", com_argv[i + 1]));
1082                 Cbuf_Execute();
1083         }
1084
1085 // COMMANDLINEOPTION: Client: -capturedemo <demoname> captures a playdemo and quits
1086         i = COM_CheckParm("-capturedemo");
1087         if (i && i + 1 < com_argc)
1088         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1089         {
1090                 Cbuf_AddText(va("playdemo %s\ncl_capturevideo 1\n", com_argv[i + 1]));
1091                 Cbuf_Execute();
1092         }
1093
1094         if (cls.state == ca_dedicated || COM_CheckParm("-listen"))
1095         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1096         {
1097                 Cbuf_AddText("startmap_dm\n");
1098                 Cbuf_Execute();
1099         }
1100
1101         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1102         {
1103                 if (gamemode == GAME_NEXUIZ)
1104                         Cbuf_AddText("togglemenu\nplayvideo logo\ncd loop 1\n");
1105                 else
1106                         Cbuf_AddText("togglemenu\n");
1107                 Cbuf_Execute();
1108         }
1109
1110         Con_DPrint("========Initialized=========\n");
1111
1112         //Host_StartVideo();
1113 }
1114
1115
1116 /*
1117 ===============
1118 Host_Shutdown
1119
1120 FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
1121 to run quit through here before the final handoff to the sys code.
1122 ===============
1123 */
1124 void Host_Shutdown(void)
1125 {
1126         static qboolean isdown = false;
1127
1128         if (isdown)
1129         {
1130                 Con_Print("recursive shutdown\n");
1131                 return;
1132         }
1133         if (setjmp(host_abortframe))
1134         {
1135                 Con_Print("aborted the quitting frame?!?\n");
1136                 return;
1137         }
1138         isdown = true;
1139
1140         // be quiet while shutting down
1141         S_StopAllSounds();
1142
1143         // disconnect client from server if active
1144         CL_Disconnect();
1145
1146         // shut down local server if active
1147         Host_ShutdownServer ();
1148
1149         // Shutdown menu
1150         if(MR_Shutdown)
1151                 MR_Shutdown();
1152
1153         // AK shutdown PRVM
1154         // AK hmm, no PRVM_Shutdown(); yet
1155
1156         CL_Video_Shutdown();
1157
1158         Host_SaveConfig_f();
1159
1160         CDAudio_Shutdown ();
1161         S_Terminate ();
1162         Curl_Shutdown ();
1163         NetConn_Shutdown ();
1164         //PR_Shutdown ();
1165
1166         if (cls.state != ca_dedicated)
1167         {
1168                 R_Modules_Shutdown();
1169                 VID_Shutdown();
1170         }
1171
1172         Cmd_Shutdown();
1173         CL_Shutdown();
1174         Sys_Shutdown();
1175         Log_Close();
1176         FS_Shutdown();
1177         Memory_Shutdown();
1178 }
1179