host.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // host.c -- coordinates spawning and killing of local servers
  21
  22 #include "quakedef.h"
  23
  24 #include <time.h>
  25 #include "libcurl.h"
  26 #include "cdaudio.h"
  27 #include "cl_gecko.h"
  28 #include "cl_video.h"
  29 #include "progsvm.h"
  30 #include "csprogs.h"
  31 #include "sv_demo.h"
  32
  33 /*
  34
  35 A server can always be started, even if the system started out as a client
  36 to a remote system.
  37
  38 A client can NOT be started if the system started as a dedicated server.
  39
  40 Memory is cleared / released when a server or client begins, not when they end.
  41
  42 */
  43
  44 // how many frames have occurred
  45 // (checked by Host_Error and Host_SaveConfig_f)
  46 int host_framecount = 0;
  47 // LordHavoc: set when quit is executed
  48 qboolean host_shuttingdown = false;
  49
  50 // the real time since application started, without any slowmo or clamping
  51 double realtime;
  52
  53 // current client
  54 client_t *host_client;
  55
  56 jmp_buf host_abortframe;
  57
  58 // pretend frames take this amount of time (in seconds), 0 = realtime
  59 cvar_t host_framerate = {0, "host_framerate","0", "locks frame timing to this value in seconds, 0.05 is 20fps for example, note that this can easily run too fast, use cl_maxfps if you want to limit your framerate instead, or sys_ticrate to limit server speed"};
  60 // shows time used by certain subsystems
  61 cvar_t host_speeds = {0, "host_speeds","0", "reports how much time is used in server/graphics/sound"};
  62 // LordHavoc: framerate upper cap
  63 cvar_t cl_maxfps = {CVAR_SAVE, "cl_maxfps", "1000000", "maximum fps cap, if game is running faster than this it will wait before running another frame (useful to make cpu time available to other programs)"};
  64 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"};
  65
  66 cvar_t developer = {0, "developer","0", "prints additional debugging messages and information (recommended for modders and level designers)"};
  67 cvar_t developer_entityparsing = {0, "developer_entityparsing", "0", "prints detailed network entities information each time a packet is received"};
  68
  69 cvar_t timestamps = {CVAR_SAVE, "timestamps", "0", "prints timestamps on console messages"};
  70 cvar_t timeformat = {CVAR_SAVE, "timeformat", "[%Y-%m-%d %H:%M:%S] ", "time format to use on timestamped console messages"};
  71
  72 /*
  73 ================
  74 Host_AbortCurrentFrame
  75
  76 aborts the current host frame and goes on with the next one
  77 ================
  78 */
  79 void Host_AbortCurrentFrame(void)
  80 {
  81         longjmp (host_abortframe, 1);
  82 }
  83
  84 /*
  85 ================
  86 Host_Error
  87
  88 This shuts down both the client and server
  89 ================
  90 */
  91 void Host_Error (const char *error, ...)
  92 {
  93         static char hosterrorstring1[MAX_INPUTLINE];
  94         static char hosterrorstring2[MAX_INPUTLINE];
  95         static qboolean hosterror = false;
  96         va_list argptr;
  97
  98         // turn off rcon redirect if it was active when the crash occurred
  99         rcon_redirect = false;
 100
 101         va_start (argptr,error);
 102         dpvsnprintf (hosterrorstring1,sizeof(hosterrorstring1),error,argptr);
 103         va_end (argptr);
 104
 105         Con_Printf("Host_Error: %s\n", hosterrorstring1);
 106
 107         // LordHavoc: if crashing very early, or currently shutting down, do
 108         // Sys_Error instead
 109         if (host_framecount < 3 || host_shuttingdown)
 110                 Sys_Error ("Host_Error: %s", hosterrorstring1);
 111
 112         if (hosterror)
 113                 Sys_Error ("Host_Error: recursively entered (original error was: %s    new error is: %s)", hosterrorstring2, hosterrorstring1);
 114         hosterror = true;
 115
 116         strlcpy(hosterrorstring2, hosterrorstring1, sizeof(hosterrorstring2));
 117
 118         CL_Parse_DumpPacket();
 119
 120         CL_Parse_ErrorCleanUp();
 121
 122         //PR_Crash();
 123
 124         // print out where the crash happened, if it was caused by QC (and do a cleanup)
 125         PRVM_Crash();
 126
 127
 128         Host_ShutdownServer ();
 129
 130         if (cls.state == ca_dedicated)
 131                 Sys_Error ("Host_Error: %s",hosterrorstring2);  // dedicated servers exit
 132
 133         CL_Disconnect ();
 134         cls.demonum = -1;
 135
 136         hosterror = false;
 137
 138         Host_AbortCurrentFrame();
 139 }
 140
 141 void Host_ServerOptions (void)
 142 {
 143         int i;
 144
 145         // general default
 146         svs.maxclients = 8;
 147
 148 // COMMANDLINEOPTION: Server: -dedicated [playerlimit] starts a dedicated server (with a command console), default playerlimit is 8
 149 // COMMANDLINEOPTION: Server: -listen [playerlimit] starts a multiplayer server with graphical client, like singleplayer but other players can connect, default playerlimit is 8
 150         // if no client is in the executable or -dedicated is specified on
 151         // commandline, start a dedicated server
 152         i = COM_CheckParm ("-dedicated");
 153         if (i || !cl_available)
 154         {
 155                 cls.state = ca_dedicated;
 156                 // check for -dedicated specifying how many players
 157                 if (i && i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
 158                         svs.maxclients = atoi (com_argv[i+1]);
 159                 if (COM_CheckParm ("-listen"))
 160                         Con_Printf ("Only one of -dedicated or -listen can be specified\n");
 161                 // default sv_public on for dedicated servers (often hosted by serious administrators), off for listen servers (often hosted by clueless users)
 162                 Cvar_SetValue("sv_public", 1);
 163         }
 164         else if (cl_available)
 165         {
 166                 // client exists and not dedicated, check if -listen is specified
 167                 cls.state = ca_disconnected;
 168                 i = COM_CheckParm ("-listen");
 169                 if (i)
 170                 {
 171                         // default players unless specified
 172                         if (i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
 173                                 svs.maxclients = atoi (com_argv[i+1]);
 174                 }
 175                 else
 176                 {
 177                         // default players in some games, singleplayer in most
 178                         if (gamemode != GAME_GOODVSBAD2 && gamemode != GAME_NEXUIZ && gamemode != GAME_BATTLEMECH)
 179                                 svs.maxclients = 1;
 180                 }
 181         }
 182
 183         svs.maxclients = bound(1, svs.maxclients, MAX_SCOREBOARD);
 184
 185         svs.clients = (client_t *)Mem_Alloc(sv_mempool, sizeof(client_t) * svs.maxclients);
 186
 187         if (svs.maxclients > 1 && !deathmatch.integer && !coop.integer)
 188                 Cvar_SetValueQuick(&deathmatch, 1);
 189 }
 190
 191 /*
 192 =======================
 193 Host_InitLocal
 194 ======================
 195 */
 196 void Host_SaveConfig_f(void);
 197 void Host_LoadConfig_f(void);
 198 static void Host_InitLocal (void)
 199 {
 200         Cmd_AddCommand("saveconfig", Host_SaveConfig_f, "save settings to config.cfg (or a specified filename) immediately (also automatic when quitting)");
 201         Cmd_AddCommand("loadconfig", Host_LoadConfig_f, "reset everything and reload configs");
 202
 203         Cvar_RegisterVariable (&host_framerate);
 204         Cvar_RegisterVariable (&host_speeds);
 205         Cvar_RegisterVariable (&cl_maxfps);
 206         Cvar_RegisterVariable (&cl_maxidlefps);
 207
 208         Cvar_RegisterVariable (&developer);
 209         Cvar_RegisterVariable (&developer_entityparsing);
 210
 211         Cvar_RegisterVariable (&timestamps);
 212         Cvar_RegisterVariable (&timeformat);
 213 }
 214
 215
 216 /*
 217 ===============
 218 Host_SaveConfig_f
 219
 220 Writes key bindings and archived cvars to config.cfg
 221 ===============
 222 */
 223 void Host_SaveConfig_f(void)
 224 {
 225         qfile_t *f;
 226         char *file = "config.cfg";
 227
 228         if(Cmd_Argc() >= 2) {
 229                 file = Cmd_Argv(1);
 230                 Con_Printf("Saving to %s\n", file);
 231         }
 232
 233 // dedicated servers initialize the host but don't parse and set the
 234 // config.cfg cvars
 235         // LordHavoc: don't save a config if it crashed in startup
 236         if (host_framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
 237         {
 238                 f = FS_Open (file, "wb", false, false);
 239                 if (!f)
 240                 {
 241                         Con_Print("Couldn't write config.cfg.\n");
 242                         return;
 243                 }
 244
 245                 Key_WriteBindings (f);
 246                 Cvar_WriteVariables (f);
 247
 248                 FS_Close (f);
 249         }
 250 }
 251
 252
 253 /*
 254 ===============
 255 Host_LoadConfig_f
 256
 257 Resets key bindings and cvars to defaults and then reloads scripts
 258 ===============
 259 */
 260 void Host_LoadConfig_f(void)
 261 {
 262         // unlock the cvar default strings so they can be updated by the new default.cfg
 263         Cvar_UnlockDefaults();
 264         // reset cvars to their defaults, and then exec startup scripts again
 265         Cbuf_InsertText("cvar_resettodefaults_all;exec quake.rc\n");
 266 }
 267
 268 /*
 269 =================
 270 SV_ClientPrint
 271
 272 Sends text across to be displayed
 273 FIXME: make this just a stuffed echo?
 274 =================
 275 */
 276 void SV_ClientPrint(const char *msg)
 277 {
 278         if (host_client->netconnection)
 279         {
 280                 MSG_WriteByte(&host_client->netconnection->message, svc_print);
 281                 MSG_WriteString(&host_client->netconnection->message, msg);
 282         }
 283 }
 284
 285 /*
 286 =================
 287 SV_ClientPrintf
 288
 289 Sends text across to be displayed
 290 FIXME: make this just a stuffed echo?
 291 =================
 292 */
 293 void SV_ClientPrintf(const char *fmt, ...)
 294 {
 295         va_list argptr;
 296         char msg[MAX_INPUTLINE];
 297
 298         va_start(argptr,fmt);
 299         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
 300         va_end(argptr);
 301
 302         SV_ClientPrint(msg);
 303 }
 304
 305 /*
 306 =================
 307 SV_BroadcastPrint
 308
 309 Sends text to all active clients
 310 =================
 311 */
 312 void SV_BroadcastPrint(const char *msg)
 313 {
 314         int i;
 315         client_t *client;
 316
 317         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
 318         {
 319                 if (client->active && client->netconnection)
 320                 {
 321                         MSG_WriteByte(&client->netconnection->message, svc_print);
 322                         MSG_WriteString(&client->netconnection->message, msg);
 323                 }
 324         }
 325
 326         if (sv_echobprint.integer && cls.state == ca_dedicated)
 327                 Con_Print(msg);
 328 }
 329
 330 /*
 331 =================
 332 SV_BroadcastPrintf
 333
 334 Sends text to all active clients
 335 =================
 336 */
 337 void SV_BroadcastPrintf(const char *fmt, ...)
 338 {
 339         va_list argptr;
 340         char msg[MAX_INPUTLINE];
 341
 342         va_start(argptr,fmt);
 343         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
 344         va_end(argptr);
 345
 346         SV_BroadcastPrint(msg);
 347 }
 348
 349 /*
 350 =================
 351 Host_ClientCommands
 352
 353 Send text over to the client to be executed
 354 =================
 355 */
 356 void Host_ClientCommands(const char *fmt, ...)
 357 {
 358         va_list argptr;
 359         char string[MAX_INPUTLINE];
 360
 361         if (!host_client->netconnection)
 362                 return;
 363
 364         va_start(argptr,fmt);
 365         dpvsnprintf(string, sizeof(string), fmt, argptr);
 366         va_end(argptr);
 367
 368         MSG_WriteByte(&host_client->netconnection->message, svc_stufftext);
 369         MSG_WriteString(&host_client->netconnection->message, string);
 370 }
 371
 372 /*
 373 =====================
 374 SV_DropClient
 375
 376 Called when the player is getting totally kicked off the host
 377 if (crash = true), don't bother sending signofs
 378 =====================
 379 */
 380 void SV_DropClient(qboolean crash)
 381 {
 382         int i;
 383         Con_Printf("Client \"%s\" dropped\n", host_client->name);
 384
 385         SV_StopDemoRecording(host_client);
 386
 387         // make sure edict is not corrupt (from a level change for example)
 388         host_client->edict = PRVM_EDICT_NUM(host_client - svs.clients + 1);
 389
 390         if (host_client->netconnection)
 391         {
 392                 // free the client (the body stays around)
 393                 if (!crash)
 394                 {
 395                         // LordHavoc: no opportunity for resending, so use unreliable 3 times
 396                         unsigned char bufdata[8];
 397                         sizebuf_t buf;
 398                         memset(&buf, 0, sizeof(buf));
 399                         buf.data = bufdata;
 400                         buf.maxsize = sizeof(bufdata);
 401                         MSG_WriteByte(&buf, svc_disconnect);
 402                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 403                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 404                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
 405                 }
 406                 // break the net connection
 407                 NetConn_Close(host_client->netconnection);
 408                 host_client->netconnection = NULL;
 409         }
 410
 411         // call qc ClientDisconnect function
 412         // LordHavoc: don't call QC if server is dead (avoids recursive
 413         // Host_Error in some mods when they run out of edicts)
 414         if (host_client->clientconnectcalled && sv.active && host_client->edict)
 415         {
 416                 // call the prog function for removing a client
 417                 // this will set the body to a dead frame, among other things
 418                 int saveSelf = prog->globals.server->self;
 419                 host_client->clientconnectcalled = false;
 420                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
 421                 PRVM_ExecuteProgram(prog->globals.server->ClientDisconnect, "QC function ClientDisconnect is missing");
 422                 prog->globals.server->self = saveSelf;
 423         }
 424
 425         // if a download is active, close it
 426         if (host_client->download_file)
 427         {
 428                 Con_DPrintf("Download of %s aborted when %s dropped\n", host_client->download_name, host_client->name);
 429                 FS_Close(host_client->download_file);
 430                 host_client->download_file = NULL;
 431                 host_client->download_name[0] = 0;
 432                 host_client->download_expectedposition = 0;
 433                 host_client->download_started = false;
 434         }
 435
 436         // remove leaving player from scoreboard
 437         host_client->name[0] = 0;
 438         host_client->colors = 0;
 439         host_client->frags = 0;
 440         // send notification to all clients
 441         // get number of client manually just to make sure we get it right...
 442         i = host_client - svs.clients;
 443         MSG_WriteByte (&sv.reliable_datagram, svc_updatename);
 444         MSG_WriteByte (&sv.reliable_datagram, i);
 445         MSG_WriteString (&sv.reliable_datagram, host_client->name);
 446         MSG_WriteByte (&sv.reliable_datagram, svc_updatecolors);
 447         MSG_WriteByte (&sv.reliable_datagram, i);
 448         MSG_WriteByte (&sv.reliable_datagram, host_client->colors);
 449         MSG_WriteByte (&sv.reliable_datagram, svc_updatefrags);
 450         MSG_WriteByte (&sv.reliable_datagram, i);
 451         MSG_WriteShort (&sv.reliable_datagram, host_client->frags);
 452
 453         // free the client now
 454         if (host_client->entitydatabase)
 455                 EntityFrame_FreeDatabase(host_client->entitydatabase);
 456         if (host_client->entitydatabase4)
 457                 EntityFrame4_FreeDatabase(host_client->entitydatabase4);
 458         if (host_client->entitydatabase5)
 459                 EntityFrame5_FreeDatabase(host_client->entitydatabase5);
 460
 461         if (sv.active)
 462         {
 463                 // clear a fields that matter to DP_SV_CLIENTNAME and DP_SV_CLIENTCOLORS, and also frags
 464                 PRVM_ED_ClearEdict(host_client->edict);
 465         }
 466
 467         // clear the client struct (this sets active to false)
 468         memset(host_client, 0, sizeof(*host_client));
 469
 470         // update server listing on the master because player count changed
 471         // (which the master uses for filtering empty/full servers)
 472         NetConn_Heartbeat(1);
 473
 474         if (sv.loadgame)
 475         {
 476                 for (i = 0;i < svs.maxclients;i++)
 477                         if (svs.clients[i].active && !svs.clients[i].spawned)
 478                                 break;
 479                 if (i == svs.maxclients)
 480                 {
 481                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
 482                         sv.paused = sv.loadgame = false; // we're basically done with loading now
 483                 }
 484         }
 485 }
 486
 487 /*
 488 ==================
 489 Host_ShutdownServer
 490
 491 This only happens at the end of a game, not between levels
 492 ==================
 493 */
 494 void Host_ShutdownServer(void)
 495 {
 496         int i;
 497
 498         Con_DPrintf("Host_ShutdownServer\n");
 499
 500         if (!sv.active)
 501                 return;
 502
 503         NetConn_Heartbeat(2);
 504         NetConn_Heartbeat(2);
 505
 506 // make sure all the clients know we're disconnecting
 507         SV_VM_Begin();
 508         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
 509                 if (host_client->active)
 510                         SV_DropClient(false); // server shutdown
 511         SV_VM_End();
 512
 513         NetConn_CloseServerPorts();
 514
 515         sv.active = false;
 516 //
 517 // clear structures
 518 //
 519         memset(&sv, 0, sizeof(sv));
 520         memset(svs.clients, 0, svs.maxclients*sizeof(client_t));
 521 }
 522
 523
 524 //============================================================================
 525
 526 /*
 527 ===================
 528 Host_GetConsoleCommands
 529
 530 Add them exactly as if they had been typed at the console
 531 ===================
 532 */
 533 void Host_GetConsoleCommands (void)
 534 {
 535         char *cmd;
 536
 537         while (1)
 538         {
 539                 cmd = Sys_ConsoleInput ();
 540                 if (!cmd)
 541                         break;
 542                 Cbuf_AddText (cmd);
 543         }
 544 }
 545
 546 /*
 547 ==================
 548 Host_TimeReport
 549
 550 Returns a time report string, for example for
 551 ==================
 552 */
 553 const char *Host_TimingReport()
 554 {
 555         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);
 556 }
 557
 558 /*
 559 ==================
 560 Host_Frame
 561
 562 Runs all active servers
 563 ==================
 564 */
 565 static void Host_Init(void);
 566 void Host_Main(void)
 567 {
 568         double time1 = 0;
 569         double time2 = 0;
 570         double time3 = 0;
 571         double cl_timer, sv_timer;
 572         double clframetime, deltarealtime, oldrealtime;
 573         double wait;
 574         int pass1, pass2, pass3, i;
 575
 576         Host_Init();
 577
 578         cl_timer = 0;
 579         sv_timer = 0;
 580
 581         realtime = Sys_DoubleTime();
 582         for (;;)
 583         {
 584                 if (setjmp(host_abortframe))
 585                         continue;                       // something bad happened, or the server disconnected
 586
 587                 oldrealtime = realtime;
 588                 realtime = Sys_DoubleTime();
 589
 590                 deltarealtime = realtime - oldrealtime;
 591                 cl_timer += deltarealtime;
 592                 sv_timer += deltarealtime;
 593
 594                 svs.perf_acc_realtime += deltarealtime;
 595
 596                 // Look for clients who have spawned
 597                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
 598                         if(host_client->spawned)
 599                                 if(host_client->netconnection)
 600                                         break;
 601                 if(i == svs.maxclients)
 602                 {
 603                         // Nobody is looking? Then we won't do timing...
 604                         // Instead, reset it to zero
 605                         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;
 606                 }
 607                 else if(svs.perf_acc_realtime > 5)
 608                 {
 609                         svs.perf_cpuload = 1 - svs.perf_acc_sleeptime / svs.perf_acc_realtime;
 610                         svs.perf_lost = svs.perf_acc_lost / svs.perf_acc_realtime;
 611                         if(svs.perf_acc_offset_samples > 0)
 612                         {
 613                                 svs.perf_offset_max = svs.perf_acc_offset_max;
 614                                 svs.perf_offset_avg = svs.perf_acc_offset / svs.perf_acc_offset_samples;
 615                                 svs.perf_offset_sdev = sqrt(svs.perf_acc_offset_squared / svs.perf_acc_offset_samples - svs.perf_offset_avg * svs.perf_offset_avg);
 616                         }
 617                         if(svs.perf_lost > 0)
 618                                 Con_DPrintf("Server can't keep up: %s\n", Host_TimingReport());
 619                         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;
 620                 }
 621
 622                 if (slowmo.value < 0.00001 && slowmo.value != 0)
 623                         Cvar_SetValue("slowmo", 0);
 624                 if (host_framerate.value < 0.00001 && host_framerate.value != 0)
 625                         Cvar_SetValue("host_framerate", 0);
 626
 627                 // keep the random time dependent, but not when playing demos/benchmarking
 628                 if(!*sv_random_seed.string && !cls.demoplayback)
 629                         rand();
 630
 631                 cl.islocalgame = NetConn_IsLocalGame();
 632
 633                 // get new key events
 634                 Sys_SendKeyEvents();
 635
 636                 NetConn_UpdateSockets();
 637
 638                 Log_DestBuffer_Flush();
 639
 640                 // receive packets on each main loop iteration, as the main loop may
 641                 // be undersleeping due to select() detecting a new packet
 642                 if (sv.active)
 643                         NetConn_ServerFrame();
 644
 645                 Curl_Run();
 646
 647                 // check for commands typed to the host
 648                 Host_GetConsoleCommands();
 649
 650                 // when a server is running we only execute console commands on server frames
 651                 // (this mainly allows frikbot .way config files to work properly by staying in sync with the server qc)
 652                 // otherwise we execute them on all frames
 653                 if (sv_timer > 0 || !sv.active)
 654                 {
 655                         // process console commands
 656                         Cbuf_Execute();
 657                 }
 658
 659                 //Con_Printf("%6.0f %6.0f\n", cl_timer * 1000000.0, sv_timer * 1000000.0);
 660
 661                 // if the accumulators haven't become positive yet, wait a while
 662                 if (cls.state == ca_dedicated)
 663                         wait = sv_timer * -1000000.0;
 664                 else if (!sv.active)
 665                         wait = cl_timer * -1000000.0;
 666                 else
 667                         wait = max(cl_timer, sv_timer) * -1000000.0;
 668                 if (wait > 100000)
 669                         wait = 100000;
 670
 671                 if (!cls.timedemo && wait > 0)
 672                 {
 673                         double time0 = Sys_DoubleTime();
 674                         if (sv_checkforpacketsduringsleep.integer)
 675                         {
 676                                 if (wait >= 1)
 677                                         NetConn_SleepMicroseconds((int)wait);
 678                         }
 679                         else
 680                         {
 681                                 if (wait >= 1000)
 682                                         Sys_Sleep((int)wait / 1000);
 683                         }
 684                         svs.perf_acc_sleeptime += Sys_DoubleTime() - time0;
 685                         continue;
 686                 }
 687
 688         //-------------------
 689         //
 690         // server operations
 691         //
 692         //-------------------
 693
 694                 // limit the frametime steps to no more than 100ms each
 695                 if (cl_timer > 0.1)
 696                         cl_timer = 0.1;
 697                 if (sv_timer > 0.1)
 698                 {
 699                         svs.perf_acc_lost += (sv_timer - 0.1);
 700                         sv_timer = 0.1;
 701                 }
 702
 703                 if (sv.active && sv_timer > 0)
 704                 {
 705                         // execute one or more server frames, with an upper limit on how much
 706                         // execution time to spend on server frames to avoid freezing the game if
 707                         // the server is overloaded, this execution time limit means the game will
 708                         // slow down if the server is taking too long.
 709                         int framecount, framelimit = 1;
 710                         double advancetime, aborttime = 0;
 711                         float offset;
 712
 713                         // run the world state
 714                         // don't allow simulation to run too fast or too slow or logic glitches can occur
 715
 716                         // stop running server frames if the wall time reaches this value
 717                         if (sys_ticrate.value <= 0)
 718                                 advancetime = sv_timer;
 719                         else if (cl.islocalgame && !sv_fixedframeratesingleplayer.integer)
 720                         {
 721                                 // synchronize to the client frametime, but no less than 10ms and no more than sys_ticrate
 722                                 advancetime = bound(0.01, cl_timer, sys_ticrate.value);
 723                                 framelimit = 10;
 724                                 aborttime = realtime + 0.1;
 725                         }
 726                         else
 727                         {
 728                                 advancetime = sys_ticrate.value;
 729                                 // listen servers can run multiple server frames per client frame
 730                                 if (cls.state == ca_connected)
 731                                 {
 732                                         framelimit = 10;
 733                                         aborttime = realtime + 0.1;
 734                                 }
 735                         }
 736                         advancetime = min(advancetime, 0.1);
 737
 738                         if(advancetime > 0)
 739                         {
 740                                 offset = sv_timer + (Sys_DoubleTime() - realtime);
 741                                 ++svs.perf_acc_offset_samples;
 742                                 svs.perf_acc_offset += offset;
 743                                 svs.perf_acc_offset_squared += offset * offset;
 744                                 if(svs.perf_acc_offset_max < offset)
 745                                         svs.perf_acc_offset_max = offset;
 746                         }
 747
 748                         // only advance time if not paused
 749                         // the game also pauses in singleplayer when menu or console is used
 750                         sv.frametime = advancetime * slowmo.value;
 751                         if (host_framerate.value)
 752                                 sv.frametime = host_framerate.value;
 753                         if (sv.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive)))
 754                                 sv.frametime = 0;
 755
 756                         // setup the VM frame
 757                         SV_VM_Begin();
 758
 759                         for (framecount = 0;framecount < framelimit && sv_timer > 0;framecount++)
 760                         {
 761                                 sv_timer -= advancetime;
 762
 763                                 // move things around and think unless paused
 764                                 if (sv.frametime)
 765                                         SV_Physics();
 766
 767                                 // if this server frame took too long, break out of the loop
 768                                 if (framelimit > 1 && Sys_DoubleTime() >= aborttime)
 769                                         break;
 770                         }
 771
 772                         // send all messages to the clients
 773                         SV_SendClientMessages();
 774
 775                         // end the server VM frame
 776                         SV_VM_End();
 777
 778                         // send an heartbeat if enough time has passed since the last one
 779                         NetConn_Heartbeat(0);
 780                 }
 781
 782         //-------------------
 783         //
 784         // client operations
 785         //
 786         //-------------------
 787
 788                 if (cls.state != ca_dedicated && (cl_timer > 0 || cls.timedemo))
 789                 {
 790                         // decide the simulation time
 791                         if (cls.capturevideo.active)
 792                         {
 793                                 if (cls.capturevideo.realtime)
 794                                         clframetime = cl.realframetime = max(cl_timer, 1.0 / cls.capturevideo.framerate);
 795                                 else
 796                                 {
 797                                         clframetime = 1.0 / cls.capturevideo.framerate;
 798                                         cl.realframetime = max(cl_timer, clframetime);
 799                                 }
 800                         }
 801                         else if (vid_activewindow)
 802                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxfps.value));
 803                         else
 804                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxidlefps.value));
 805
 806                         // apply slowmo scaling
 807                         clframetime *= cl.movevars_timescale;
 808                         // scale playback speed of demos by slowmo cvar
 809                         if (cls.demoplayback)
 810                         {
 811                                 clframetime *= slowmo.value;
 812                                 // if demo playback is paused, don't advance time at all
 813                                 if (cls.demopaused)
 814                                         clframetime = 0;
 815                         }
 816
 817                         // host_framerate overrides all else
 818                         if (host_framerate.value)
 819                                 clframetime = host_framerate.value;
 820
 821                         if (cls.timedemo)
 822                                 clframetime = cl.realframetime = cl_timer;
 823
 824                         // deduct the frame time from the accumulator
 825                         cl_timer -= cl.realframetime;
 826
 827                         cl.oldtime = cl.time;
 828                         cl.time += clframetime;
 829
 830                         // Collect input into cmd
 831                         CL_Input();
 832
 833                         // check for new packets
 834                         NetConn_ClientFrame();
 835
 836                         // read a new frame from a demo if needed
 837                         CL_ReadDemoMessage();
 838
 839                         // now that packets have been read, send input to server
 840                         CL_SendMove();
 841
 842                         // update client world (interpolate entities, create trails, etc)
 843                         CL_UpdateWorld();
 844
 845                         // update video
 846                         if (host_speeds.integer)
 847                                 time1 = Sys_DoubleTime();
 848
 849                         //ui_update();
 850
 851                         CL_Video_Frame();
 852 #ifdef SUPPORT_GECKO
 853                         CL_Gecko_Frame();
 854 #endif
 855
 856                         CL_UpdateScreen();
 857
 858                         if (host_speeds.integer)
 859                                 time2 = Sys_DoubleTime();
 860
 861                         // update audio
 862                         if(cl.csqc_usecsqclistener)
 863                         {
 864                                 S_Update(&cl.csqc_listenermatrix);
 865                                 cl.csqc_usecsqclistener = false;
 866                         }
 867                         else
 868                                 S_Update(&r_view.matrix);
 869
 870                         CDAudio_Update();
 871
 872                         if (host_speeds.integer)
 873                         {
 874                                 pass1 = (int)((time1 - time3)*1000000);
 875                                 time3 = Sys_DoubleTime();
 876                                 pass2 = (int)((time2 - time1)*1000000);
 877                                 pass3 = (int)((time3 - time2)*1000000);
 878                                 Con_Printf("%6ius total %6ius server %6ius gfx %6ius snd\n",
 879                                                         pass1+pass2+pass3, pass1, pass2, pass3);
 880                         }
 881                 }
 882
 883                 // if there is some time remaining from this frame, reset the timers
 884                 if (cl_timer >= 0)
 885                         cl_timer = 0;
 886                 if (sv_timer >= 0)
 887                 {
 888                         svs.perf_acc_lost += sv_timer;
 889                         sv_timer = 0;
 890                 }
 891
 892                 host_framecount++;
 893         }
 894 }
 895
 896 //============================================================================
 897
 898 qboolean vid_opened = false;
 899 void Host_StartVideo(void)
 900 {
 901         if (!vid_opened && cls.state != ca_dedicated)
 902         {
 903                 vid_opened = true;
 904                 VID_Start();
 905                 CDAudio_Startup();
 906         }
 907 }
 908
 909 char engineversion[128];
 910
 911 qboolean sys_nostdout = false;
 912
 913 extern void Render_Init(void);
 914 extern void Mathlib_Init(void);
 915 extern void FS_Init(void);
 916 extern void FS_Shutdown(void);
 917 extern void PR_Cmd_Init(void);
 918 extern void COM_Init_Commands(void);
 919 extern void FS_Init_Commands(void);
 920 extern qboolean host_stuffcmdsrun;
 921
 922 /*
 923 ====================
 924 Host_Init
 925 ====================
 926 */
 927 static void Host_Init (void)
 928 {
 929         int i;
 930         const char* os;
 931
 932         if (COM_CheckParm("-profilegameonly"))
 933                 Sys_AllowProfiling(false);
 934
 935         // LordHavoc: quake never seeded the random number generator before... heh
 936         if (COM_CheckParm("-benchmark"))
 937                 srand(0); // predictable random sequence for -benchmark
 938         else
 939                 srand(time(NULL));
 940
 941         // FIXME: this is evil, but possibly temporary
 942 // COMMANDLINEOPTION: Console: -developer enables warnings and other notices (RECOMMENDED for mod developers)
 943         if (COM_CheckParm("-developer"))
 944         {
 945                 developer.value = developer.integer = 100;
 946                 developer.string = "100";
 947         }
 948
 949         if (COM_CheckParm("-developer2"))
 950         {
 951                 developer.value = developer.integer = 100;
 952                 developer.string = "100";
 953                 developer_memory.value = developer_memory.integer = 100;
 954                 developer.string = "100";
 955                 developer_memorydebug.value = developer_memorydebug.integer = 100;
 956                 developer_memorydebug.string = "100";
 957         }
 958
 959 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
 960         if (COM_CheckParm("-nostdout"))
 961                 sys_nostdout = 1;
 962
 963         // used by everything
 964         Memory_Init();
 965
 966         // initialize console command/cvar/alias/command execution systems
 967         Cmd_Init();
 968
 969         // initialize memory subsystem cvars/commands
 970         Memory_Init_Commands();
 971
 972         // initialize console and logging and its cvars/commands
 973         Con_Init();
 974
 975         // initialize various cvars that could not be initialized earlier
 976         Curl_Init_Commands();
 977         Cmd_Init_Commands();
 978         Sys_Init_Commands();
 979         COM_Init_Commands();
 980         FS_Init_Commands();
 981
 982         // initialize console window (only used by sys_win.c)
 983         Sys_InitConsole();
 984
 985         // detect gamemode from commandline options or executable name
 986         COM_InitGameType();
 987
 988         // construct a version string for the corner of the console
 989 #if defined(__linux__)
 990         os = "Linux";
 991 #elif defined(WIN32)
 992         os = "Windows";
 993 #elif defined(__FreeBSD__)
 994         os = "FreeBSD";
 995 #elif defined(__NetBSD__)
 996         os = "NetBSD";
 997 #elif defined(__OpenBSD__)
 998         os = "OpenBSD";
 999 #elif defined(MACOSX)
1000         os = "Mac OS X";
1001 #elif defined(__MORPHOS__)
1002         os = "MorphOS";
1003 #else
1004         os = "Unknown";
1005 #endif
1006         dpsnprintf (engineversion, sizeof (engineversion), "%s %s %s", gamename, os, buildstring);
1007         Con_Printf("%s\n", engineversion);
1008
1009         // initialize ixtable
1010         Mathlib_Init();
1011
1012         // initialize filesystem (including fs_basedir, fs_gamedir, -game, scr_screenshot_name)
1013         FS_Init();
1014
1015         NetConn_Init();
1016         Curl_Init();
1017         //PR_Init();
1018         //PR_Cmd_Init();
1019         PRVM_Init();
1020         Mod_Init();
1021         World_Init();
1022         SV_Init();
1023         Host_InitCommands();
1024         Host_InitLocal();
1025         Host_ServerOptions();
1026
1027         if (cls.state != ca_dedicated)
1028         {
1029                 Con_Printf("Initializing client\n");
1030
1031                 R_Modules_Init();
1032                 Palette_Init();
1033                 MR_Init_Commands();
1034                 VID_Shared_Init();
1035                 VID_Init();
1036                 Render_Init();
1037                 S_Init();
1038                 CDAudio_Init();
1039                 Key_Init();
1040                 V_Init();
1041                 CL_Init();
1042         }
1043
1044         // set up the default startmap_sp and startmap_dm aliases (mods can
1045         // override these) and then execute the quake.rc startup script
1046         if (gamemode == GAME_NEHAHRA)
1047                 Cbuf_AddText("alias startmap_sp \"map nehstart\"\nalias startmap_dm \"map nehstart\"\nexec quake.rc\n");
1048         else if (gamemode == GAME_TRANSFUSION)
1049                 Cbuf_AddText("alias startmap_sp \"map e1m1\"\n""alias startmap_dm \"map bb1\"\nexec quake.rc\n");
1050         else if (gamemode == GAME_TEU)
1051                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec teu.rc\n");
1052         else
1053                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec quake.rc\n");
1054         Cbuf_Execute();
1055
1056         // if stuffcmds wasn't run, then quake.rc is probably missing, use default
1057         if (!host_stuffcmdsrun)
1058         {
1059                 Cbuf_AddText("exec default.cfg\nexec config.cfg\nexec autoexec.cfg\nstuffcmds\n");
1060                 Cbuf_Execute();
1061         }
1062
1063         // put up the loading image so the user doesn't stare at a black screen...
1064         SCR_BeginLoadingPlaque();
1065
1066         // FIXME: put this into some neat design, but the menu should be allowed to crash
1067         // without crashing the whole game, so this should just be a short-time solution
1068
1069         // here comes the not so critical stuff
1070         if (setjmp(host_abortframe)) {
1071                 return;
1072         }
1073
1074         if (cls.state != ca_dedicated)
1075         {
1076                 MR_Init();
1077         }
1078
1079         // check for special benchmark mode
1080 // 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)
1081         i = COM_CheckParm("-benchmark");
1082         if (i && i + 1 < com_argc)
1083         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1084         {
1085                 Cbuf_AddText(va("timedemo %s\n", com_argv[i + 1]));
1086                 Cbuf_Execute();
1087         }
1088
1089         // check for special demo mode
1090 // COMMANDLINEOPTION: Client: -demo <demoname> runs a playdemo and quits
1091         i = COM_CheckParm("-demo");
1092         if (i && i + 1 < com_argc)
1093         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1094         {
1095                 Cbuf_AddText(va("playdemo %s\n", com_argv[i + 1]));
1096                 Cbuf_Execute();
1097         }
1098
1099 // COMMANDLINEOPTION: Client: -capturedemo <demoname> captures a playdemo and quits
1100         i = COM_CheckParm("-capturedemo");
1101         if (i && i + 1 < com_argc)
1102         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1103         {
1104                 Cbuf_AddText(va("playdemo %s\ncl_capturevideo 1\n", com_argv[i + 1]));
1105                 Cbuf_Execute();
1106         }
1107
1108         if (cls.state == ca_dedicated || COM_CheckParm("-listen"))
1109         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1110         {
1111                 Cbuf_AddText("startmap_dm\n");
1112                 Cbuf_Execute();
1113         }
1114
1115         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1116         {
1117                 if (gamemode == GAME_NEXUIZ)
1118                         Cbuf_AddText("togglemenu\nplayvideo logo\ncd loop 1\n");
1119                 else
1120                         Cbuf_AddText("togglemenu\n");
1121                 Cbuf_Execute();
1122         }
1123
1124         Con_DPrint("========Initialized=========\n");
1125
1126         //Host_StartVideo();
1127 }
1128
1129
1130 /*
1131 ===============
1132 Host_Shutdown
1133
1134 FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
1135 to run quit through here before the final handoff to the sys code.
1136 ===============
1137 */
1138 void Host_Shutdown(void)
1139 {
1140         static qboolean isdown = false;
1141
1142         if (isdown)
1143         {
1144                 Con_Print("recursive shutdown\n");
1145                 return;
1146         }
1147         if (setjmp(host_abortframe))
1148         {
1149                 Con_Print("aborted the quitting frame?!?\n");
1150                 return;
1151         }
1152         isdown = true;
1153
1154         // be quiet while shutting down
1155         S_StopAllSounds();
1156
1157         // disconnect client from server if active
1158         CL_Disconnect();
1159
1160         // shut down local server if active
1161         Host_ShutdownServer ();
1162
1163         // Shutdown menu
1164         if(MR_Shutdown)
1165                 MR_Shutdown();
1166
1167         // AK shutdown PRVM
1168         // AK hmm, no PRVM_Shutdown(); yet
1169
1170 #ifdef SUPPORT_GECKO
1171         CL_Gecko_Shutdown();
1172 #endif
1173         CL_Video_Shutdown();
1174
1175         Host_SaveConfig_f();
1176
1177         CDAudio_Shutdown ();
1178         S_Terminate ();
1179         Curl_Shutdown ();
1180         NetConn_Shutdown ();
1181         //PR_Shutdown ();
1182
1183         if (cls.state != ca_dedicated)
1184         {
1185                 R_Modules_Shutdown();
1186                 VID_Shutdown();
1187         }
1188
1189         Cmd_Shutdown();
1190         CL_Shutdown();
1191         Sys_Shutdown();
1192         Log_Close();
1193         FS_Shutdown();
1194         Memory_Shutdown();
1195 }
1196