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