sv_user.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 // sv_user.c -- server code for moving users
  21
  22 #include "quakedef.h"
  23 #include "sv_demo.h"
  24 #define DEBUGMOVES 0
  25
  26 static usercmd_t cmd;
  27 extern cvar_t sv_autodemo_perclient;
  28
  29 /*
  30 ==================
  31 SV_PreSpawn_f
  32 ==================
  33 */
  34 void SV_PreSpawn_f(cmd_state_t *cmd)
  35 {
  36         if (host_client->prespawned)
  37         {
  38                 Con_Print("prespawn not valid -- already prespawned\n");
  39                 return;
  40         }
  41         host_client->prespawned = true;
  42
  43         if (host_client->netconnection)
  44         {
  45                 SZ_Write (&host_client->netconnection->message, sv.signon.data, sv.signon.cursize);
  46                 MSG_WriteByte (&host_client->netconnection->message, svc_signonnum);
  47                 MSG_WriteByte (&host_client->netconnection->message, 2);
  48                 host_client->sendsignon = 0;            // enable unlimited sends again
  49         }
  50
  51         // reset the name change timer because the client will send name soon
  52         host_client->nametime = 0;
  53 }
  54
  55 /*
  56 ==================
  57 SV_Spawn_f
  58 ==================
  59 */
  60 void SV_Spawn_f(cmd_state_t *cmd)
  61 {
  62         prvm_prog_t *prog = SVVM_prog;
  63         int i;
  64         client_t *client;
  65         int stats[MAX_CL_STATS];
  66
  67         if (!host_client->prespawned)
  68         {
  69                 Con_Print("Spawn not valid -- not yet prespawned\n");
  70                 return;
  71         }
  72         if (host_client->spawned)
  73         {
  74                 Con_Print("Spawn not valid -- already spawned\n");
  75                 return;
  76         }
  77         host_client->spawned = true;
  78
  79         // reset name change timer again because they might want to change name
  80         // again in the first 5 seconds after connecting
  81         host_client->nametime = 0;
  82
  83         // LadyHavoc: moved this above the QC calls at FrikaC's request
  84         // LadyHavoc: commented this out
  85         //if (host_client->netconnection)
  86         //      SZ_Clear (&host_client->netconnection->message);
  87
  88         // run the entrance script
  89         if (sv.loadgame)
  90         {
  91                 // loaded games are fully initialized already
  92                 if (PRVM_serverfunction(RestoreGame))
  93                 {
  94                         Con_DPrint("Calling RestoreGame\n");
  95                         PRVM_serverglobalfloat(time) = sv.time;
  96                         PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
  97                         prog->ExecuteProgram(prog, PRVM_serverfunction(RestoreGame), "QC function RestoreGame is missing");
  98                 }
  99         }
 100         else
 101         {
 102                 //Con_Printf("SV_Spawn_f: host_client->edict->netname = %s, host_client->edict->netname = %s, host_client->name = %s\n", PRVM_GetString(PRVM_serveredictstring(host_client->edict, netname)), PRVM_GetString(PRVM_serveredictstring(host_client->edict, netname)), host_client->name);
 103
 104                 // copy spawn parms out of the client_t
 105                 for (i=0 ; i< NUM_SPAWN_PARMS ; i++)
 106                         (&PRVM_serverglobalfloat(parm1))[i] = host_client->spawn_parms[i];
 107
 108                 // call the spawn function
 109                 host_client->clientconnectcalled = true;
 110                 PRVM_serverglobalfloat(time) = sv.time;
 111                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
 112                 prog->ExecuteProgram(prog, PRVM_serverfunction(ClientConnect), "QC function ClientConnect is missing");
 113
 114                 if (cls.state == ca_dedicated)
 115                         Con_Printf("%s connected\n", host_client->name);
 116
 117                 PRVM_serverglobalfloat(time) = sv.time;
 118                 prog->ExecuteProgram(prog, PRVM_serverfunction(PutClientInServer), "QC function PutClientInServer is missing");
 119         }
 120
 121         if (!host_client->netconnection)
 122                 return;
 123
 124         // send time of update
 125         MSG_WriteByte (&host_client->netconnection->message, svc_time);
 126         MSG_WriteFloat (&host_client->netconnection->message, sv.time);
 127
 128         // send all current names, colors, and frag counts
 129         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
 130         {
 131                 if (!client->active)
 132                         continue;
 133                 MSG_WriteByte (&host_client->netconnection->message, svc_updatename);
 134                 MSG_WriteByte (&host_client->netconnection->message, i);
 135                 MSG_WriteString (&host_client->netconnection->message, client->name);
 136                 MSG_WriteByte (&host_client->netconnection->message, svc_updatefrags);
 137                 MSG_WriteByte (&host_client->netconnection->message, i);
 138                 MSG_WriteShort (&host_client->netconnection->message, client->frags);
 139                 MSG_WriteByte (&host_client->netconnection->message, svc_updatecolors);
 140                 MSG_WriteByte (&host_client->netconnection->message, i);
 141                 MSG_WriteByte (&host_client->netconnection->message, client->colors);
 142         }
 143
 144         // send all current light styles
 145         for (i=0 ; i<MAX_LIGHTSTYLES ; i++)
 146         {
 147                 if (sv.lightstyles[i][0])
 148                 {
 149                         MSG_WriteByte (&host_client->netconnection->message, svc_lightstyle);
 150                         MSG_WriteByte (&host_client->netconnection->message, (char)i);
 151                         MSG_WriteString (&host_client->netconnection->message, sv.lightstyles[i]);
 152                 }
 153         }
 154
 155         // send some stats
 156         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 157         MSG_WriteByte (&host_client->netconnection->message, STAT_TOTALSECRETS);
 158         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(total_secrets));
 159
 160         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 161         MSG_WriteByte (&host_client->netconnection->message, STAT_TOTALMONSTERS);
 162         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(total_monsters));
 163
 164         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 165         MSG_WriteByte (&host_client->netconnection->message, STAT_SECRETS);
 166         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(found_secrets));
 167
 168         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 169         MSG_WriteByte (&host_client->netconnection->message, STAT_MONSTERS);
 170         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(killed_monsters));
 171
 172         // send a fixangle
 173         // Never send a roll angle, because savegames can catch the server
 174         // in a state where it is expecting the client to correct the angle
 175         // and it won't happen if the game was just loaded, so you wind up
 176         // with a permanent head tilt
 177         if (sv.loadgame)
 178         {
 179                 MSG_WriteByte (&host_client->netconnection->message, svc_setangle);
 180                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, v_angle)[0], sv.protocol);
 181                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, v_angle)[1], sv.protocol);
 182                 MSG_WriteAngle (&host_client->netconnection->message, 0, sv.protocol);
 183         }
 184         else
 185         {
 186                 MSG_WriteByte (&host_client->netconnection->message, svc_setangle);
 187                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, angles)[0], sv.protocol);
 188                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, angles)[1], sv.protocol);
 189                 MSG_WriteAngle (&host_client->netconnection->message, 0, sv.protocol);
 190         }
 191
 192         SV_WriteClientdataToMessage (host_client, host_client->edict, &host_client->netconnection->message, stats);
 193
 194         MSG_WriteByte (&host_client->netconnection->message, svc_signonnum);
 195         MSG_WriteByte (&host_client->netconnection->message, 3);
 196 }
 197
 198 /*
 199 ==================
 200 SV_Begin_f
 201 ==================
 202 */
 203 void SV_Begin_f(cmd_state_t *cmd)
 204 {
 205         if (!host_client->spawned)
 206         {
 207                 Con_Print("Begin not valid -- not yet spawned\n");
 208                 return;
 209         }
 210         if (host_client->begun)
 211         {
 212                 Con_Print("Begin not valid -- already begun\n");
 213                 return;
 214         }
 215         host_client->begun = true;
 216
 217         // LadyHavoc: note: this code also exists in SV_DropClient
 218         if (sv.loadgame)
 219         {
 220                 int i;
 221                 for (i = 0;i < svs.maxclients;i++)
 222                         if (svs.clients[i].active && !svs.clients[i].spawned)
 223                                 break;
 224                 if (i == svs.maxclients)
 225                 {
 226                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
 227                         sv.paused = sv.loadgame = false; // we're basically done with loading now
 228                 }
 229         }
 230 }
 231
 232 /*
 233 ===============
 234 SV_SetIdealPitch
 235 ===============
 236 */
 237 #define MAX_FORWARD     6
 238 void SV_SetIdealPitch (void)
 239 {
 240         prvm_prog_t *prog = SVVM_prog;
 241         float   angleval, sinval, cosval, step, dir;
 242         trace_t tr;
 243         vec3_t  top, bottom;
 244         float   z[MAX_FORWARD];
 245         int             i, j;
 246         int             steps;
 247
 248         if (!((int)PRVM_serveredictfloat(host_client->edict, flags) & FL_ONGROUND))
 249                 return;
 250
 251         angleval = PRVM_serveredictvector(host_client->edict, angles)[YAW] * M_PI*2 / 360;
 252         sinval = sin(angleval);
 253         cosval = cos(angleval);
 254
 255         for (i=0 ; i<MAX_FORWARD ; i++)
 256         {
 257                 top[0] = PRVM_serveredictvector(host_client->edict, origin)[0] + cosval*(i+3)*12;
 258                 top[1] = PRVM_serveredictvector(host_client->edict, origin)[1] + sinval*(i+3)*12;
 259                 top[2] = PRVM_serveredictvector(host_client->edict, origin)[2] + PRVM_serveredictvector(host_client->edict, view_ofs)[2];
 260
 261                 bottom[0] = top[0];
 262                 bottom[1] = top[1];
 263                 bottom[2] = top[2] - 160;
 264
 265                 tr = SV_TraceLine(top, bottom, MOVE_NOMONSTERS, host_client->edict, SUPERCONTENTS_SOLID, 0, 0, collision_extendmovelength.value);
 266                 // if looking at a wall, leave ideal the way is was
 267                 if (tr.startsolid)
 268                         return;
 269
 270                 // near a dropoff
 271                 if (tr.fraction == 1)
 272                         return;
 273
 274                 z[i] = top[2] + tr.fraction*(bottom[2]-top[2]);
 275         }
 276
 277         dir = 0;
 278         steps = 0;
 279         for (j=1 ; j<i ; j++)
 280         {
 281                 step = z[j] - z[j-1];
 282                 if (step > -ON_EPSILON && step < ON_EPSILON)
 283                         continue;
 284
 285                 // mixed changes
 286                 if (dir && ( step-dir > ON_EPSILON || step-dir < -ON_EPSILON ) )
 287                         return;
 288
 289                 steps++;
 290                 dir = step;
 291         }
 292
 293         if (!dir)
 294         {
 295                 PRVM_serveredictfloat(host_client->edict, idealpitch) = 0;
 296                 return;
 297         }
 298
 299         if (steps < 2)
 300                 return;
 301         PRVM_serveredictfloat(host_client->edict, idealpitch) = -dir * sv_idealpitchscale.value;
 302 }
 303
 304 static vec3_t wishdir, forward, right, up;
 305 static float wishspeed;
 306
 307 static qboolean onground;
 308
 309 /*
 310 ==================
 311 SV_UserFriction
 312
 313 ==================
 314 */
 315 static void SV_UserFriction (void)
 316 {
 317         prvm_prog_t *prog = SVVM_prog;
 318         float speed, newspeed, control, friction;
 319         vec3_t start, stop;
 320         trace_t trace;
 321
 322         speed = sqrt(PRVM_serveredictvector(host_client->edict, velocity)[0]*PRVM_serveredictvector(host_client->edict, velocity)[0]+PRVM_serveredictvector(host_client->edict, velocity)[1]*PRVM_serveredictvector(host_client->edict, velocity)[1]);
 323         if (!speed)
 324                 return;
 325
 326         // if the leading edge is over a dropoff, increase friction
 327         start[0] = stop[0] = PRVM_serveredictvector(host_client->edict, origin)[0] + PRVM_serveredictvector(host_client->edict, velocity)[0]/speed*16;
 328         start[1] = stop[1] = PRVM_serveredictvector(host_client->edict, origin)[1] + PRVM_serveredictvector(host_client->edict, velocity)[1]/speed*16;
 329         start[2] = PRVM_serveredictvector(host_client->edict, origin)[2] + PRVM_serveredictvector(host_client->edict, mins)[2];
 330         stop[2] = start[2] - 34;
 331
 332         trace = SV_TraceLine(start, stop, MOVE_NOMONSTERS, host_client->edict, SV_GenericHitSuperContentsMask(host_client->edict), 0, 0, collision_extendmovelength.value);
 333
 334         if (trace.fraction == 1.0)
 335                 friction = sv_friction.value*sv_edgefriction.value;
 336         else
 337                 friction = sv_friction.value;
 338
 339         // apply friction
 340         control = speed < sv_stopspeed.value ? sv_stopspeed.value : speed;
 341         newspeed = speed - sv.frametime*control*friction;
 342
 343         if (newspeed < 0)
 344                 newspeed = 0;
 345         else
 346                 newspeed /= speed;
 347
 348         VectorScale(PRVM_serveredictvector(host_client->edict, velocity), newspeed, PRVM_serveredictvector(host_client->edict, velocity));
 349 }
 350
 351 /*
 352 ==============
 353 SV_Accelerate
 354 ==============
 355 */
 356 static void SV_Accelerate (void)
 357 {
 358         prvm_prog_t *prog = SVVM_prog;
 359         int i;
 360         float addspeed, accelspeed, currentspeed;
 361
 362         currentspeed = DotProduct (PRVM_serveredictvector(host_client->edict, velocity), wishdir);
 363         addspeed = wishspeed - currentspeed;
 364         if (addspeed <= 0)
 365                 return;
 366         accelspeed = sv_accelerate.value*sv.frametime*wishspeed;
 367         if (accelspeed > addspeed)
 368                 accelspeed = addspeed;
 369
 370         for (i=0 ; i<3 ; i++)
 371                 PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed*wishdir[i];
 372 }
 373
 374 extern cvar_t sv_gameplayfix_q2airaccelerate;
 375 static void SV_AirAccelerate (vec3_t wishveloc)
 376 {
 377         prvm_prog_t *prog = SVVM_prog;
 378         int i;
 379         float addspeed, wishspd, accelspeed, currentspeed;
 380
 381         wishspd = VectorNormalizeLength (wishveloc);
 382         if (wishspd > sv_maxairspeed.value)
 383                 wishspd = sv_maxairspeed.value;
 384         currentspeed = DotProduct (PRVM_serveredictvector(host_client->edict, velocity), wishveloc);
 385         addspeed = wishspd - currentspeed;
 386         if (addspeed <= 0)
 387                 return;
 388         accelspeed = (sv_airaccelerate.value < 0 ? sv_accelerate.value : sv_airaccelerate.value)*(sv_gameplayfix_q2airaccelerate.integer ? wishspd : wishspeed) * sv.frametime;
 389         if (accelspeed > addspeed)
 390                 accelspeed = addspeed;
 391
 392         for (i=0 ; i<3 ; i++)
 393                 PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed*wishveloc[i];
 394 }
 395
 396
 397 static void DropPunchAngle (void)
 398 {
 399         prvm_prog_t *prog = SVVM_prog;
 400         vec_t len;
 401         vec3_t punchangle, punchvector;
 402
 403         VectorCopy(PRVM_serveredictvector(host_client->edict, punchangle), punchangle);
 404         VectorCopy(PRVM_serveredictvector(host_client->edict, punchvector), punchvector);
 405
 406         len = VectorNormalizeLength(punchangle);
 407         if (len > 0)
 408         {
 409                 len -= 10*sv.frametime;
 410                 if (len < 0)
 411                         len = 0;
 412                 VectorScale(punchangle, len, punchangle);
 413         }
 414
 415         len = VectorNormalizeLength(punchvector);
 416         if (len > 0)
 417         {
 418                 len -= 20*sv.frametime;
 419                 if (len < 0)
 420                         len = 0;
 421                 VectorScale(punchvector, len, punchvector);
 422         }
 423
 424         VectorCopy(punchangle, PRVM_serveredictvector(host_client->edict, punchangle));
 425         VectorCopy(punchvector, PRVM_serveredictvector(host_client->edict, punchvector));
 426 }
 427
 428 /*
 429 ===================
 430 SV_WaterMove
 431
 432 ===================
 433 */
 434 static void SV_WaterMove (void)
 435 {
 436         prvm_prog_t *prog = SVVM_prog;
 437         int i;
 438         vec3_t wishvel, v_angle;
 439         vec_t speed, newspeed, fwishspeed, addspeed, accelspeed, temp;
 440
 441         // user intentions
 442         VectorCopy(PRVM_serveredictvector(host_client->edict, v_angle), v_angle);
 443         AngleVectors(v_angle, forward, right, up);
 444
 445         for (i=0 ; i<3 ; i++)
 446                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 447
 448         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 449                 wishvel[2] -= 60;               // drift towards bottom
 450         else
 451                 wishvel[2] += cmd.upmove;
 452
 453         fwishspeed = VectorLength(wishvel);
 454         if (fwishspeed > sv_maxspeed.value)
 455         {
 456                 temp = sv_maxspeed.value/fwishspeed;
 457                 VectorScale (wishvel, temp, wishvel);
 458                 fwishspeed = sv_maxspeed.value;
 459         }
 460         fwishspeed *= 0.7;
 461
 462         // water friction
 463         speed = VectorLength(PRVM_serveredictvector(host_client->edict, velocity));
 464         if (speed)
 465         {
 466                 newspeed = speed - sv.frametime * speed * (sv_waterfriction.value < 0 ? sv_friction.value : sv_waterfriction.value);
 467                 if (newspeed < 0)
 468                         newspeed = 0;
 469                 temp = newspeed/speed;
 470                 VectorScale(PRVM_serveredictvector(host_client->edict, velocity), temp, PRVM_serveredictvector(host_client->edict, velocity));
 471         }
 472         else
 473                 newspeed = 0;
 474
 475         // water acceleration
 476         if (!fwishspeed)
 477                 return;
 478
 479         addspeed = fwishspeed - newspeed;
 480         if (addspeed <= 0)
 481                 return;
 482
 483         VectorNormalize (wishvel);
 484         accelspeed = (sv_wateraccelerate.value < 0 ? sv_accelerate.value : sv_wateraccelerate.value) * fwishspeed * sv.frametime;
 485         if (accelspeed > addspeed)
 486                 accelspeed = addspeed;
 487
 488         for (i=0 ; i<3 ; i++)
 489                 PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed * wishvel[i];
 490 }
 491
 492 static void SV_WaterJump (void)
 493 {
 494         prvm_prog_t *prog = SVVM_prog;
 495         if (sv.time > PRVM_serveredictfloat(host_client->edict, teleport_time) || !PRVM_serveredictfloat(host_client->edict, waterlevel))
 496         {
 497                 PRVM_serveredictfloat(host_client->edict, flags) = (int)PRVM_serveredictfloat(host_client->edict, flags) & ~FL_WATERJUMP;
 498                 PRVM_serveredictfloat(host_client->edict, teleport_time) = 0;
 499         }
 500         PRVM_serveredictvector(host_client->edict, velocity)[0] = PRVM_serveredictvector(host_client->edict, movedir)[0];
 501         PRVM_serveredictvector(host_client->edict, velocity)[1] = PRVM_serveredictvector(host_client->edict, movedir)[1];
 502 }
 503
 504
 505 /*
 506 ===================
 507 SV_AirMove
 508
 509 ===================
 510 */
 511 static void SV_AirMove (void)
 512 {
 513         prvm_prog_t *prog = SVVM_prog;
 514         int i;
 515         vec3_t wishvel;
 516         float fmove, smove, temp;
 517
 518         // LadyHavoc: correct quake movement speed bug when looking up/down
 519         wishvel[0] = wishvel[2] = 0;
 520         wishvel[1] = PRVM_serveredictvector(host_client->edict, angles)[1];
 521         AngleVectors (wishvel, forward, right, up);
 522
 523         fmove = cmd.forwardmove;
 524         smove = cmd.sidemove;
 525
 526 // hack to not let you back into teleporter
 527         if (sv.time < PRVM_serveredictfloat(host_client->edict, teleport_time) && fmove < 0)
 528                 fmove = 0;
 529
 530         for (i=0 ; i<3 ; i++)
 531                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 532
 533         if ((int)PRVM_serveredictfloat(host_client->edict, movetype) != MOVETYPE_WALK)
 534                 wishvel[2] += cmd.upmove;
 535
 536         VectorCopy (wishvel, wishdir);
 537         wishspeed = VectorNormalizeLength(wishdir);
 538         if (wishspeed > sv_maxspeed.value)
 539         {
 540                 temp = sv_maxspeed.value/wishspeed;
 541                 VectorScale (wishvel, temp, wishvel);
 542                 wishspeed = sv_maxspeed.value;
 543         }
 544
 545         if (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_NOCLIP)
 546         {
 547                 // noclip
 548                 VectorCopy (wishvel, PRVM_serveredictvector(host_client->edict, velocity));
 549         }
 550         else if (onground)
 551         {
 552                 SV_UserFriction ();
 553                 SV_Accelerate ();
 554         }
 555         else
 556         {
 557                 // not on ground, so little effect on velocity
 558                 SV_AirAccelerate (wishvel);
 559         }
 560 }
 561
 562 /*
 563 ===================
 564 SV_ClientThink
 565
 566 the move fields specify an intended velocity in pix/sec
 567 the angle fields specify an exact angular motion in degrees
 568 ===================
 569 */
 570 void SV_ClientThink (void)
 571 {
 572         prvm_prog_t *prog = SVVM_prog;
 573         vec3_t v_angle, angles, velocity;
 574
 575         //Con_Printf("clientthink for %ims\n", (int) (sv.frametime * 1000));
 576
 577         SV_ApplyClientMove();
 578         // make sure the velocity is sane (not a NaN)
 579         SV_CheckVelocity(host_client->edict);
 580
 581         // LadyHavoc: QuakeC replacement for SV_ClientThink (player movement)
 582         if (PRVM_serverfunction(SV_PlayerPhysics) && sv_playerphysicsqc.integer)
 583         {
 584                 PRVM_serverglobalfloat(time) = sv.time;
 585                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
 586                 prog->ExecuteProgram(prog, PRVM_serverfunction(SV_PlayerPhysics), "QC function SV_PlayerPhysics is missing");
 587                 SV_CheckVelocity(host_client->edict);
 588                 return;
 589         }
 590
 591         if (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_NONE)
 592                 return;
 593
 594         onground = ((int)PRVM_serveredictfloat(host_client->edict, flags) & FL_ONGROUND) != 0;
 595
 596         DropPunchAngle ();
 597
 598         // if dead, behave differently
 599         if (PRVM_serveredictfloat(host_client->edict, health) <= 0)
 600                 return;
 601
 602         cmd = host_client->cmd;
 603
 604         // angles
 605         // show 1/3 the pitch angle and all the roll angle
 606         VectorAdd (PRVM_serveredictvector(host_client->edict, v_angle), PRVM_serveredictvector(host_client->edict, punchangle), v_angle);
 607         VectorCopy(PRVM_serveredictvector(host_client->edict, angles), angles);
 608         VectorCopy(PRVM_serveredictvector(host_client->edict, velocity), velocity);
 609         PRVM_serveredictvector(host_client->edict, angles)[ROLL] = V_CalcRoll (angles, velocity)*4;
 610         if (!PRVM_serveredictfloat(host_client->edict, fixangle))
 611         {
 612                 PRVM_serveredictvector(host_client->edict, angles)[PITCH] = -v_angle[PITCH]/3;
 613                 PRVM_serveredictvector(host_client->edict, angles)[YAW] = v_angle[YAW];
 614         }
 615
 616         if ( (int)PRVM_serveredictfloat(host_client->edict, flags) & FL_WATERJUMP )
 617         {
 618                 SV_WaterJump ();
 619                 SV_CheckVelocity(host_client->edict);
 620                 return;
 621         }
 622
 623         /*
 624         // Player is (somehow) outside of the map, or flying, or noclipping
 625         if (PRVM_serveredictfloat(host_client->edict, movetype) != MOVETYPE_NOCLIP && (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict)))
 626         //if (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_NOCLIP || PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict))
 627         {
 628                 SV_FreeMove ();
 629                 return;
 630         }
 631         */
 632
 633         // walk
 634         if ((PRVM_serveredictfloat(host_client->edict, waterlevel) >= 2) && (PRVM_serveredictfloat(host_client->edict, movetype) != MOVETYPE_NOCLIP))
 635         {
 636                 SV_WaterMove ();
 637                 SV_CheckVelocity(host_client->edict);
 638                 return;
 639         }
 640
 641         SV_AirMove ();
 642         SV_CheckVelocity(host_client->edict);
 643 }
 644
 645 /*
 646 ===================
 647 SV_ReadClientMove
 648 ===================
 649 */
 650 int sv_numreadmoves = 0;
 651 usercmd_t sv_readmoves[CL_MAX_USERCMDS];
 652 static void SV_ReadClientMove (void)
 653 {
 654         prvm_prog_t *prog = SVVM_prog;
 655         int i;
 656         usercmd_t newmove;
 657         usercmd_t *move = &newmove;
 658
 659         memset(move, 0, sizeof(*move));
 660
 661         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 662
 663         // read ping time
 664         if (sv.protocol != PROTOCOL_QUAKE && sv.protocol != PROTOCOL_QUAKEDP && sv.protocol != PROTOCOL_NEHAHRAMOVIE && sv.protocol != PROTOCOL_NEHAHRABJP && sv.protocol != PROTOCOL_NEHAHRABJP2 && sv.protocol != PROTOCOL_NEHAHRABJP3 && sv.protocol != PROTOCOL_DARKPLACES1 && sv.protocol != PROTOCOL_DARKPLACES2 && sv.protocol != PROTOCOL_DARKPLACES3 && sv.protocol != PROTOCOL_DARKPLACES4 && sv.protocol != PROTOCOL_DARKPLACES5 && sv.protocol != PROTOCOL_DARKPLACES6)
 665                 move->sequence = MSG_ReadLong(&sv_message);
 666         move->time = move->clienttime = MSG_ReadFloat(&sv_message);
 667         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 668         move->receivetime = (float)sv.time;
 669
 670 #if DEBUGMOVES
 671         Con_Printf("%s move%i #%u %ims (%ims) %i %i '%i %i %i' '%i %i %i'\n", move->time > move->receivetime ? "^3read future" : "^4read normal", sv_numreadmoves + 1, move->sequence, (int)floor((move->time - host_client->cmd.time) * 1000.0 + 0.5), (int)floor(move->time * 1000.0 + 0.5), move->impulse, move->buttons, (int)move->viewangles[0], (int)move->viewangles[1], (int)move->viewangles[2], (int)move->forwardmove, (int)move->sidemove, (int)move->upmove);
 672 #endif
 673         // limit reported time to current time
 674         // (incase the client is trying to cheat)
 675         move->time = min(move->time, move->receivetime + sv.frametime);
 676
 677         // read current angles
 678         for (i = 0;i < 3;i++)
 679         {
 680                 if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_QUAKEDP || sv.protocol == PROTOCOL_NEHAHRAMOVIE || sv.protocol == PROTOCOL_NEHAHRABJP || sv.protocol == PROTOCOL_NEHAHRABJP2 || sv.protocol == PROTOCOL_NEHAHRABJP3)
 681                         move->viewangles[i] = MSG_ReadAngle8i(&sv_message);
 682                 else if (sv.protocol == PROTOCOL_DARKPLACES1)
 683                         move->viewangles[i] = MSG_ReadAngle16i(&sv_message);
 684                 else if (sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3)
 685                         move->viewangles[i] = MSG_ReadAngle32f(&sv_message);
 686                 else
 687                         move->viewangles[i] = MSG_ReadAngle16i(&sv_message);
 688         }
 689         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 690
 691         // read movement
 692         move->forwardmove = MSG_ReadCoord16i(&sv_message);
 693         move->sidemove = MSG_ReadCoord16i(&sv_message);
 694         move->upmove = MSG_ReadCoord16i(&sv_message);
 695         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 696
 697         // read buttons
 698         // be sure to bitwise OR them into the move->buttons because we want to
 699         // accumulate button presses from multiple packets per actual move
 700         if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_QUAKEDP || sv.protocol == PROTOCOL_NEHAHRAMOVIE || sv.protocol == PROTOCOL_NEHAHRABJP || sv.protocol == PROTOCOL_NEHAHRABJP2 || sv.protocol == PROTOCOL_NEHAHRABJP3 || sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3 || sv.protocol == PROTOCOL_DARKPLACES4 || sv.protocol == PROTOCOL_DARKPLACES5)
 701                 move->buttons = MSG_ReadByte(&sv_message);
 702         else
 703                 move->buttons = MSG_ReadLong(&sv_message);
 704         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 705
 706         // read impulse
 707         move->impulse = MSG_ReadByte(&sv_message);
 708         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 709
 710         // PRYDON_CLIENTCURSOR
 711         if (sv.protocol != PROTOCOL_QUAKE && sv.protocol != PROTOCOL_QUAKEDP && sv.protocol != PROTOCOL_NEHAHRAMOVIE && sv.protocol != PROTOCOL_NEHAHRABJP && sv.protocol != PROTOCOL_NEHAHRABJP2 && sv.protocol != PROTOCOL_NEHAHRABJP3 && sv.protocol != PROTOCOL_DARKPLACES1 && sv.protocol != PROTOCOL_DARKPLACES2 && sv.protocol != PROTOCOL_DARKPLACES3 && sv.protocol != PROTOCOL_DARKPLACES4 && sv.protocol != PROTOCOL_DARKPLACES5)
 712         {
 713                 // 30 bytes
 714                 move->cursor_screen[0] = MSG_ReadShort(&sv_message) * (1.0f / 32767.0f);
 715                 move->cursor_screen[1] = MSG_ReadShort(&sv_message) * (1.0f / 32767.0f);
 716                 move->cursor_start[0] = MSG_ReadFloat(&sv_message);
 717                 move->cursor_start[1] = MSG_ReadFloat(&sv_message);
 718                 move->cursor_start[2] = MSG_ReadFloat(&sv_message);
 719                 move->cursor_impact[0] = MSG_ReadFloat(&sv_message);
 720                 move->cursor_impact[1] = MSG_ReadFloat(&sv_message);
 721                 move->cursor_impact[2] = MSG_ReadFloat(&sv_message);
 722                 move->cursor_entitynumber = (unsigned short)MSG_ReadShort(&sv_message);
 723                 if (move->cursor_entitynumber >= prog->max_edicts)
 724                 {
 725                         Con_DPrintf("SV_ReadClientMessage: client send bad cursor_entitynumber\n");
 726                         move->cursor_entitynumber = 0;
 727                 }
 728                 // as requested by FrikaC, cursor_trace_ent is reset to world if the
 729                 // entity is free at time of receipt
 730                 if (PRVM_EDICT_NUM(move->cursor_entitynumber)->priv.server->free)
 731                         move->cursor_entitynumber = 0;
 732                 if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 733         }
 734
 735         // if the previous move has not been applied yet, we need to accumulate
 736         // the impulse/buttons from it
 737         if (!host_client->cmd.applied)
 738         {
 739                 if (!move->impulse)
 740                         move->impulse = host_client->cmd.impulse;
 741                 move->buttons |= host_client->cmd.buttons;
 742         }
 743
 744         // now store this move for later execution
 745         // (we have to buffer the moves because of old ones being repeated)
 746         if (sv_numreadmoves < CL_MAX_USERCMDS)
 747                 sv_readmoves[sv_numreadmoves++] = *move;
 748
 749         // movement packet loss tracking
 750         if(move->sequence)
 751         {
 752                 if(move->sequence > host_client->movement_highestsequence_seen)
 753                 {
 754                         if(host_client->movement_highestsequence_seen)
 755                         {
 756                                 // mark moves in between as lost
 757                                 unsigned int delta = move->sequence - host_client->movement_highestsequence_seen - 1;
 758                                 if(delta < NETGRAPH_PACKETS)
 759                                 {
 760                                         unsigned int u;
 761                                         for(u = 0; u < delta; ++u)
 762                                                 host_client->movement_count[(host_client->movement_highestsequence_seen + 1 + u) % NETGRAPH_PACKETS] = -1;
 763                                 }
 764                                 else
 765                                         memset(host_client->movement_count, -1, sizeof(host_client->movement_count));
 766                         }
 767                         // mark THIS move as seen for the first time
 768                         host_client->movement_count[move->sequence % NETGRAPH_PACKETS] = 1;
 769                         // update highest sequence seen
 770                         host_client->movement_highestsequence_seen = move->sequence;
 771                 }
 772                 else
 773                         if(host_client->movement_count[move->sequence % NETGRAPH_PACKETS] >= 0)
 774                                 ++host_client->movement_count[move->sequence % NETGRAPH_PACKETS];
 775         }
 776         else
 777         {
 778                 host_client->movement_highestsequence_seen = 0;
 779                 memset(host_client->movement_count, 0, sizeof(host_client->movement_count));
 780         }
 781 }
 782
 783 static void SV_ExecuteClientMoves(void)
 784 {
 785         prvm_prog_t *prog = SVVM_prog;
 786         int moveindex;
 787         float moveframetime;
 788         double oldframetime;
 789         double oldframetime2;
 790 #ifdef NUM_PING_TIMES
 791         double total;
 792 #endif
 793         if (sv_numreadmoves < 1)
 794                 return;
 795         // only start accepting input once the player is spawned
 796         if (!host_client->begun)
 797                 return;
 798 #if DEBUGMOVES
 799         Con_Printf("SV_ExecuteClientMoves: read %i moves at sv.time %f\n", sv_numreadmoves, (float)sv.time);
 800 #endif
 801         // disable clientside movement prediction in some cases
 802         if (ceil(max(sv_readmoves[sv_numreadmoves-1].receivetime - sv_readmoves[sv_numreadmoves-1].time, 0) * 1000.0) < sv_clmovement_minping.integer)
 803                 host_client->clmovement_disabletimeout = host.realtime + sv_clmovement_minping_disabletime.value / 1000.0;
 804         // several conditions govern whether clientside movement prediction is allowed
 805         if (sv_readmoves[sv_numreadmoves-1].sequence && sv_clmovement_enable.integer && sv_clmovement_inputtimeout.value > 0 && host_client->clmovement_disabletimeout <= host.realtime && (PRVM_serveredictfloat(host_client->edict, disableclientprediction) == -1 || (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_WALK && (!PRVM_serveredictfloat(host_client->edict, disableclientprediction)))))
 806         {
 807                 // process the moves in order and ignore old ones
 808                 // but always trust the latest move
 809                 // (this deals with bogus initial move sequences after level change,
 810                 //  where the client will eventually catch up with the level change
 811                 //  and reset its move sequence)
 812                 for (moveindex = 0;moveindex < sv_numreadmoves;moveindex++)
 813                 {
 814                         usercmd_t *move = sv_readmoves + moveindex;
 815                         if (host_client->movesequence < move->sequence || moveindex == sv_numreadmoves - 1)
 816                         {
 817 #if DEBUGMOVES
 818                                 Con_Printf("%smove #%u %ims (%ims) %i %i '%i %i %i' '%i %i %i'\n", (move->time - host_client->cmd.time) > sv.frametime * 1.01 ? "^1" : "^2", move->sequence, (int)floor((move->time - host_client->cmd.time) * 1000.0 + 0.5), (int)floor(move->time * 1000.0 + 0.5), move->impulse, move->buttons, (int)move->viewangles[0], (int)move->viewangles[1], (int)move->viewangles[2], (int)move->forwardmove, (int)move->sidemove, (int)move->upmove);
 819 #endif
 820                                 // this is a new move
 821                                 move->time = bound(sv.time - 1, move->time, sv.time); // prevent slowhack/speedhack combos
 822                                 move->time = max(move->time, host_client->cmd.time); // prevent backstepping of time
 823                                 moveframetime = bound(0, move->time - host_client->cmd.time, min(0.1, sv_clmovement_inputtimeout.value));
 824
 825                                 // discard (treat like lost) moves with too low distance from
 826                                 // the previous one to prevent hacks using float inaccuracy
 827                                 // clients will see this as packet loss in the netgraph
 828                                 // this should also apply if a move cannot get
 829                                 // executed because it came too late and
 830                                 // already was performed serverside
 831                                 if(moveframetime < 0.0005)
 832                                 {
 833                                         // count the move as LOST if we don't
 834                                         // execute it but it has higher
 835                                         // sequence count
 836                                         if(host_client->movesequence)
 837                                                 if(move->sequence > host_client->movesequence)
 838                                                         host_client->movement_count[(move->sequence) % NETGRAPH_PACKETS] = -1;
 839                                         continue;
 840                                 }
 841
 842                                 //Con_Printf("movesequence = %i (%i lost), moveframetime = %f\n", move->sequence, move->sequence ? move->sequence - host_client->movesequence - 1 : 0, moveframetime);
 843                                 host_client->cmd = *move;
 844                                 host_client->movesequence = move->sequence;
 845
 846                                 // if using prediction, we need to perform moves when packets are
 847                                 // received, even if multiple occur in one frame
 848                                 // (they can't go beyond the current time so there is no cheat issue
 849                                 //  with this approach, and if they don't send input for a while they
 850                                 //  start moving anyway, so the longest 'lagaport' possible is
 851                                 //  determined by the sv_clmovement_inputtimeout cvar)
 852                                 if (moveframetime <= 0)
 853                                         continue;
 854                                 oldframetime = PRVM_serverglobalfloat(frametime);
 855                                 oldframetime2 = sv.frametime;
 856                                 // update ping time for qc to see while executing this move
 857                                 host_client->ping = host_client->cmd.receivetime - host_client->cmd.time;
 858                                 // the server and qc frametime values must be changed temporarily
 859                                 PRVM_serverglobalfloat(frametime) = sv.frametime = moveframetime;
 860                                 // if move is more than 50ms, split it into two moves (this matches QWSV behavior and the client prediction)
 861                                 if (sv.frametime > 0.05)
 862                                 {
 863                                         PRVM_serverglobalfloat(frametime) = sv.frametime = moveframetime * 0.5f;
 864                                         SV_Physics_ClientMove();
 865                                 }
 866                                 SV_Physics_ClientMove();
 867                                 sv.frametime = oldframetime2;
 868                                 PRVM_serverglobalfloat(frametime) = oldframetime;
 869                                 host_client->clmovement_inputtimeout = sv_clmovement_inputtimeout.value;
 870                         }
 871                 }
 872         }
 873         else
 874         {
 875                 // try to gather button bits from old moves, but only if their time is
 876                 // advancing (ones with the same timestamp can't be trusted)
 877                 for (moveindex = 0;moveindex < sv_numreadmoves-1;moveindex++)
 878                 {
 879                         usercmd_t *move = sv_readmoves + moveindex;
 880                         if (host_client->cmd.time < move->time)
 881                         {
 882                                 sv_readmoves[sv_numreadmoves-1].buttons |= move->buttons;
 883                                 if (move->impulse)
 884                                         sv_readmoves[sv_numreadmoves-1].impulse = move->impulse;
 885                         }
 886                 }
 887                 // now copy the new move
 888                 host_client->cmd = sv_readmoves[sv_numreadmoves-1];
 889                 host_client->cmd.time = max(host_client->cmd.time, sv.time);
 890                         // physics will run up to sv.time, so allow no predicted moves
 891                         // before that otherwise, there is a speedhack by turning
 892                         // prediction on and off repeatedly on client side because the
 893                         // engine would run BOTH client and server physics for the same
 894                         // time
 895                 host_client->movesequence = 0;
 896                 // make sure that normal physics takes over immediately
 897                 host_client->clmovement_inputtimeout = 0;
 898         }
 899
 900         // calculate average ping time
 901         host_client->ping = host_client->cmd.receivetime - host_client->cmd.clienttime;
 902 #ifdef NUM_PING_TIMES
 903         host_client->ping_times[host_client->num_pings % NUM_PING_TIMES] = host_client->cmd.receivetime - host_client->cmd.clienttime;
 904         host_client->num_pings++;
 905         for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 906                 total += host_client->ping_times[i];
 907         host_client->ping = total / NUM_PING_TIMES;
 908 #endif
 909 }
 910
 911 void SV_ApplyClientMove (void)
 912 {
 913         prvm_prog_t *prog = SVVM_prog;
 914         usercmd_t *move = &host_client->cmd;
 915         int j, movementloss, packetloss;
 916
 917         if (!move->receivetime)
 918                 return;
 919
 920         // note: a move can be applied multiple times if the client packets are
 921         // not coming as often as the physics is executed, and the move must be
 922         // applied before running qc each time because the id1 qc had a bug where
 923         // it clears self.button2 in PlayerJump, causing pogostick behavior if
 924         // moves are not applied every time before calling qc
 925         move->applied = true;
 926
 927         // set the edict fields
 928         PRVM_serveredictfloat(host_client->edict, button0) = move->buttons & 1;
 929         PRVM_serveredictfloat(host_client->edict, button2) = (move->buttons & 2)>>1;
 930         if (move->impulse)
 931                 PRVM_serveredictfloat(host_client->edict, impulse) = move->impulse;
 932         // only send the impulse to qc once
 933         move->impulse = 0;
 934
 935         movementloss = packetloss = 0;
 936         if(host_client->netconnection)
 937         {
 938                 for (j = 0;j < NETGRAPH_PACKETS;j++)
 939                         if (host_client->netconnection->incoming_netgraph[j].unreliablebytes == NETGRAPH_LOSTPACKET)
 940                                 packetloss++;
 941                 for (j = 0;j < NETGRAPH_PACKETS;j++)
 942                         if (host_client->movement_count[j] < 0)
 943                                 movementloss++;
 944         }
 945
 946         VectorCopy(move->viewangles, PRVM_serveredictvector(host_client->edict, v_angle));
 947         PRVM_serveredictfloat(host_client->edict, button3) = ((move->buttons >> 2) & 1);
 948         PRVM_serveredictfloat(host_client->edict, button4) = ((move->buttons >> 3) & 1);
 949         PRVM_serveredictfloat(host_client->edict, button5) = ((move->buttons >> 4) & 1);
 950         PRVM_serveredictfloat(host_client->edict, button6) = ((move->buttons >> 5) & 1);
 951         PRVM_serveredictfloat(host_client->edict, button7) = ((move->buttons >> 6) & 1);
 952         PRVM_serveredictfloat(host_client->edict, button8) = ((move->buttons >> 7) & 1);
 953         PRVM_serveredictfloat(host_client->edict, button9) = ((move->buttons >> 11) & 1);
 954         PRVM_serveredictfloat(host_client->edict, button10) = ((move->buttons >> 12) & 1);
 955         PRVM_serveredictfloat(host_client->edict, button11) = ((move->buttons >> 13) & 1);
 956         PRVM_serveredictfloat(host_client->edict, button12) = ((move->buttons >> 14) & 1);
 957         PRVM_serveredictfloat(host_client->edict, button13) = ((move->buttons >> 15) & 1);
 958         PRVM_serveredictfloat(host_client->edict, button14) = ((move->buttons >> 16) & 1);
 959         PRVM_serveredictfloat(host_client->edict, button15) = ((move->buttons >> 17) & 1);
 960         PRVM_serveredictfloat(host_client->edict, button16) = ((move->buttons >> 18) & 1);
 961         PRVM_serveredictfloat(host_client->edict, buttonuse) = ((move->buttons >> 8) & 1);
 962         PRVM_serveredictfloat(host_client->edict, buttonchat) = ((move->buttons >> 9) & 1);
 963         PRVM_serveredictfloat(host_client->edict, cursor_active) = ((move->buttons >> 10) & 1);
 964         VectorSet(PRVM_serveredictvector(host_client->edict, movement), move->forwardmove, move->sidemove, move->upmove);
 965         VectorCopy(move->cursor_screen, PRVM_serveredictvector(host_client->edict, cursor_screen));
 966         VectorCopy(move->cursor_start, PRVM_serveredictvector(host_client->edict, cursor_trace_start));
 967         VectorCopy(move->cursor_impact, PRVM_serveredictvector(host_client->edict, cursor_trace_endpos));
 968         PRVM_serveredictedict(host_client->edict, cursor_trace_ent) = PRVM_EDICT_TO_PROG(PRVM_EDICT_NUM(move->cursor_entitynumber));
 969         PRVM_serveredictfloat(host_client->edict, ping) = host_client->ping * 1000.0;
 970         PRVM_serveredictfloat(host_client->edict, ping_packetloss) = packetloss / (float) NETGRAPH_PACKETS;
 971         PRVM_serveredictfloat(host_client->edict, ping_movementloss) = movementloss / (float) NETGRAPH_PACKETS;
 972 }
 973
 974 static qboolean SV_FrameLost(int framenum)
 975 {
 976         if (host_client->entitydatabase5)
 977         {
 978                 if (framenum <= host_client->entitydatabase5->latestframenum)
 979                 {
 980                         EntityFrame5_LostFrame(host_client->entitydatabase5, framenum);
 981                         EntityFrameCSQC_LostFrame(host_client, framenum);
 982                         return true;
 983                 }
 984         }
 985         return false;
 986 }
 987
 988 static void SV_FrameAck(int framenum)
 989 {
 990         if (host_client->entitydatabase)
 991                 EntityFrame_AckFrame(host_client->entitydatabase, framenum);
 992         else if (host_client->entitydatabase4)
 993                 EntityFrame4_AckFrame(host_client->entitydatabase4, framenum, true);
 994         else if (host_client->entitydatabase5)
 995                 EntityFrame5_AckFrame(host_client->entitydatabase5, framenum);
 996 }
 997
 998 /*
 999 ===================
1000 SV_ReadClientMessage
1001 ===================
1002 */
1003 void SV_ReadClientMessage(void)
1004 {
1005         prvm_prog_t *prog = SVVM_prog;
1006         int netcmd, num, start;
1007         char *s, *p, *q;
1008
1009         if(sv_autodemo_perclient.integer >= 2)
1010                 SV_WriteDemoMessage(host_client, &(host_client->netconnection->message), true);
1011
1012         //MSG_BeginReading ();
1013         sv_numreadmoves = 0;
1014
1015         for(;;)
1016         {
1017                 if (!host_client->active)
1018                 {
1019                         // a command caused an error
1020                         SV_DropClient (false);
1021                         return;
1022                 }
1023
1024                 if (sv_message.badread)
1025                 {
1026                         Con_Print("SV_ReadClientMessage: badread\n");
1027                         SV_DropClient (false);
1028                         return;
1029                 }
1030
1031                 netcmd = MSG_ReadByte(&sv_message);
1032                 if (netcmd == -1)
1033                 {
1034                         // end of message
1035                         // apply the moves that were read this frame
1036                         SV_ExecuteClientMoves();
1037                         break;
1038                 }
1039
1040                 switch (netcmd)
1041                 {
1042                 default:
1043                         Con_Printf("SV_ReadClientMessage: unknown command char %i (at offset 0x%x)\n", netcmd, sv_message.readcount);
1044                         if (developer_networking.integer)
1045                                 Com_HexDumpToConsole(sv_message.data, sv_message.cursize);
1046                         SV_DropClient (false);
1047                         return;
1048
1049                 case clc_nop:
1050                         break;
1051
1052                 case clc_stringcmd:
1053                         // allow reliable messages now as the client is done with initial loading
1054                         if (host_client->sendsignon == 2)
1055                                 host_client->sendsignon = 0;
1056                         s = MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring));
1057                         q = NULL;
1058                         for(p = s; *p; ++p) switch(*p)
1059                         {
1060                                 case 10:
1061                                 case 13:
1062                                         if(!q)
1063                                                 q = p;
1064                                         break;
1065                                 default:
1066                                         if(q)
1067                                                 goto clc_stringcmd_invalid; // newline seen, THEN something else -> possible exploit
1068                                         break;
1069                         }
1070                         if(q)
1071                                 *q = 0;
1072                         if (strncasecmp(s, "spawn", 5) == 0
1073                          || strncasecmp(s, "begin", 5) == 0
1074                          || strncasecmp(s, "prespawn", 8) == 0)
1075                                 Cmd_ExecuteString (&cmd_serverfromclient, s, src_client, true);
1076                         else if (PRVM_serverfunction(SV_ParseClientCommand))
1077                         {
1078                                 int restorevm_tempstringsbuf_cursize;
1079                                 restorevm_tempstringsbuf_cursize = prog->tempstringsbuf.cursize;
1080                                 PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(prog, s);
1081                                 PRVM_serverglobalfloat(time) = sv.time;
1082                                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
1083                                 prog->ExecuteProgram(prog, PRVM_serverfunction(SV_ParseClientCommand), "QC function SV_ParseClientCommand is missing");
1084                                 prog->tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
1085                         }
1086                         else
1087                                 Cmd_ExecuteString (&cmd_serverfromclient, s, src_client, true);
1088                         break;
1089
1090 clc_stringcmd_invalid:
1091                         Con_Printf("Received invalid stringcmd from %s\n", host_client->name);
1092                         if(developer.integer > 0)
1093                                 Com_HexDumpToConsole((unsigned char *) s, (int)strlen(s));
1094                         break;
1095
1096                 case clc_disconnect:
1097                         SV_DropClient (false); // client wants to disconnect
1098                         return;
1099
1100                 case clc_move:
1101                         SV_ReadClientMove();
1102                         break;
1103
1104                 case clc_ackdownloaddata:
1105                         start = MSG_ReadLong(&sv_message);
1106                         num = MSG_ReadShort(&sv_message);
1107                         if (host_client->download_file && host_client->download_started)
1108                         {
1109                                 if (host_client->download_expectedposition == start)
1110                                 {
1111                                         int size = (int)FS_FileSize(host_client->download_file);
1112                                         // a data block was successfully received by the client,
1113                                         // update the expected position on the next data block
1114                                         host_client->download_expectedposition = start + num;
1115                                         // if this was the last data block of the file, it's done
1116                                         if (host_client->download_expectedposition >= FS_FileSize(host_client->download_file))
1117                                         {
1118                                                 // tell the client that the download finished
1119                                                 // we need to calculate the crc now
1120                                                 //
1121                                                 // note: at this point the OS probably has the file
1122                                                 // entirely in memory, so this is a faster operation
1123                                                 // now than it was when the download started.
1124                                                 //
1125                                                 // it is also preferable to do this at the end of the
1126                                                 // download rather than the start because it reduces
1127                                                 // potential for Denial Of Service attacks against the
1128                                                 // server.
1129                                                 int crc;
1130                                                 unsigned char *temp;
1131                                                 FS_Seek(host_client->download_file, 0, SEEK_SET);
1132                                                 temp = (unsigned char *) Mem_Alloc(tempmempool, size);
1133                                                 FS_Read(host_client->download_file, temp, size);
1134                                                 crc = CRC_Block(temp, size);
1135                                                 Mem_Free(temp);
1136                                                 // calculated crc, send the file info to the client
1137                                                 // (so that it can verify the data)
1138                                                 SV_ClientCommands("\ncl_downloadfinished %i %i %s\n", size, crc, host_client->download_name);
1139                                                 Con_DPrintf("Download of %s by %s has finished\n", host_client->download_name, host_client->name);
1140                                                 FS_Close(host_client->download_file);
1141                                                 host_client->download_file = NULL;
1142                                                 host_client->download_name[0] = 0;
1143                                                 host_client->download_expectedposition = 0;
1144                                                 host_client->download_started = false;
1145                                         }
1146                                 }
1147                                 else
1148                                 {
1149                                         // a data block was lost, reset to the expected position
1150                                         // and resume sending from there
1151                                         FS_Seek(host_client->download_file, host_client->download_expectedposition, SEEK_SET);
1152                                 }
1153                         }
1154                         break;
1155
1156                 case clc_ackframe:
1157                         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
1158                         num = MSG_ReadLong(&sv_message);
1159                         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
1160                         if (developer_networkentities.integer >= 10)
1161                                 Con_Printf("recv clc_ackframe %i\n", num);
1162                         // if the client hasn't progressed through signons yet,
1163                         // ignore any clc_ackframes we get (they're probably from the
1164                         // previous level)
1165                         if (host_client->begun && host_client->latestframenum < num)
1166                         {
1167                                 int i;
1168                                 for (i = host_client->latestframenum + 1;i < num;i++)
1169                                         if (!SV_FrameLost(i))
1170                                                 break;
1171                                 SV_FrameAck(num);
1172                                 host_client->latestframenum = num;
1173                         }
1174                         break;
1175                 }
1176         }
1177 }
1178