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 usercmd;
  27 extern cvar_t sv_autodemo_perclient;
  28 extern cvar_t sv_rollangle;
  29 extern cvar_t sv_rollspeed;
  30
  31 /*
  32 ==================
  33 SV_PreSpawn_f
  34 ==================
  35 */
  36 void SV_PreSpawn_f(cmd_state_t *cmd)
  37 {
  38         if (host_client->prespawned)
  39         {
  40                 Con_Print("prespawn not valid -- already prespawned\n");
  41                 return;
  42         }
  43         host_client->prespawned = true;
  44
  45         if (host_client->netconnection)
  46         {
  47                 SZ_Write (&host_client->netconnection->message, sv.signon.data, sv.signon.cursize);
  48                 MSG_WriteByte (&host_client->netconnection->message, svc_signonnum);
  49                 MSG_WriteByte (&host_client->netconnection->message, 2);
  50                 host_client->sendsignon = 0;            // enable unlimited sends again
  51         }
  52
  53         // reset the name change timer because the client will send name soon
  54         host_client->nametime = 0;
  55 }
  56
  57 /*
  58 ==================
  59 SV_Spawn_f
  60 ==================
  61 */
  62 void SV_Spawn_f(cmd_state_t *cmd)
  63 {
  64         prvm_prog_t *prog = SVVM_prog;
  65         int i;
  66         client_t *client;
  67         int stats[MAX_CL_STATS];
  68
  69         if (!host_client->prespawned)
  70         {
  71                 Con_Print("Spawn not valid -- not yet prespawned\n");
  72                 return;
  73         }
  74         if (host_client->spawned)
  75         {
  76                 Con_Print("Spawn not valid -- already spawned\n");
  77                 return;
  78         }
  79         host_client->spawned = true;
  80
  81         // reset name change timer again because they might want to change name
  82         // again in the first 5 seconds after connecting
  83         host_client->nametime = 0;
  84
  85         // LadyHavoc: moved this above the QC calls at FrikaC's request
  86         // LadyHavoc: commented this out
  87         //if (host_client->netconnection)
  88         //      SZ_Clear (&host_client->netconnection->message);
  89
  90         // run the entrance script
  91         if (sv.loadgame)
  92         {
  93                 // loaded games are fully initialized already
  94                 if (PRVM_serverfunction(RestoreGame))
  95                 {
  96                         Con_DPrint("Calling RestoreGame\n");
  97                         PRVM_serverglobalfloat(time) = sv.time;
  98                         PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
  99                         prog->ExecuteProgram(prog, PRVM_serverfunction(RestoreGame), "QC function RestoreGame is missing");
 100                 }
 101         }
 102         else
 103         {
 104                 //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);
 105
 106                 // copy spawn parms out of the client_t
 107                 for (i=0 ; i< NUM_SPAWN_PARMS ; i++)
 108                         (&PRVM_serverglobalfloat(parm1))[i] = host_client->spawn_parms[i];
 109
 110                 // call the spawn function
 111                 host_client->clientconnectcalled = true;
 112                 PRVM_serverglobalfloat(time) = sv.time;
 113                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
 114                 prog->ExecuteProgram(prog, PRVM_serverfunction(ClientConnect), "QC function ClientConnect is missing");
 115
 116                 if (cls.state == ca_dedicated)
 117                         Con_Printf("%s connected\n", host_client->name);
 118
 119                 PRVM_serverglobalfloat(time) = sv.time;
 120                 prog->ExecuteProgram(prog, PRVM_serverfunction(PutClientInServer), "QC function PutClientInServer is missing");
 121         }
 122
 123         if (!host_client->netconnection)
 124                 return;
 125
 126         // send time of update
 127         MSG_WriteByte (&host_client->netconnection->message, svc_time);
 128         MSG_WriteFloat (&host_client->netconnection->message, sv.time);
 129
 130         // send all current names, colors, and frag counts
 131         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
 132         {
 133                 if (!client->active)
 134                         continue;
 135                 MSG_WriteByte (&host_client->netconnection->message, svc_updatename);
 136                 MSG_WriteByte (&host_client->netconnection->message, i);
 137                 MSG_WriteString (&host_client->netconnection->message, client->name);
 138                 MSG_WriteByte (&host_client->netconnection->message, svc_updatefrags);
 139                 MSG_WriteByte (&host_client->netconnection->message, i);
 140                 MSG_WriteShort (&host_client->netconnection->message, client->frags);
 141                 MSG_WriteByte (&host_client->netconnection->message, svc_updatecolors);
 142                 MSG_WriteByte (&host_client->netconnection->message, i);
 143                 MSG_WriteByte (&host_client->netconnection->message, client->colors);
 144         }
 145
 146         // send all current light styles
 147         for (i=0 ; i<MAX_LIGHTSTYLES ; i++)
 148         {
 149                 if (sv.lightstyles[i][0])
 150                 {
 151                         MSG_WriteByte (&host_client->netconnection->message, svc_lightstyle);
 152                         MSG_WriteByte (&host_client->netconnection->message, (char)i);
 153                         MSG_WriteString (&host_client->netconnection->message, sv.lightstyles[i]);
 154                 }
 155         }
 156
 157         // send some stats
 158         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 159         MSG_WriteByte (&host_client->netconnection->message, STAT_TOTALSECRETS);
 160         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(total_secrets));
 161
 162         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 163         MSG_WriteByte (&host_client->netconnection->message, STAT_TOTALMONSTERS);
 164         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(total_monsters));
 165
 166         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 167         MSG_WriteByte (&host_client->netconnection->message, STAT_SECRETS);
 168         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(found_secrets));
 169
 170         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 171         MSG_WriteByte (&host_client->netconnection->message, STAT_MONSTERS);
 172         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(killed_monsters));
 173
 174         // send a fixangle
 175         // Never send a roll angle, because savegames can catch the server
 176         // in a state where it is expecting the client to correct the angle
 177         // and it won't happen if the game was just loaded, so you wind up
 178         // with a permanent head tilt
 179         if (sv.loadgame)
 180         {
 181                 MSG_WriteByte (&host_client->netconnection->message, svc_setangle);
 182                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, v_angle)[0], sv.protocol);
 183                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, v_angle)[1], sv.protocol);
 184                 MSG_WriteAngle (&host_client->netconnection->message, 0, sv.protocol);
 185         }
 186         else
 187         {
 188                 MSG_WriteByte (&host_client->netconnection->message, svc_setangle);
 189                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, angles)[0], sv.protocol);
 190                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, angles)[1], sv.protocol);
 191                 MSG_WriteAngle (&host_client->netconnection->message, 0, sv.protocol);
 192         }
 193
 194         SV_WriteClientdataToMessage (host_client, host_client->edict, &host_client->netconnection->message, stats);
 195
 196         MSG_WriteByte (&host_client->netconnection->message, svc_signonnum);
 197         MSG_WriteByte (&host_client->netconnection->message, 3);
 198 }
 199
 200 /*
 201 ==================
 202 SV_Begin_f
 203 ==================
 204 */
 205 void SV_Begin_f(cmd_state_t *cmd)
 206 {
 207         if (!host_client->spawned)
 208         {
 209                 Con_Print("Begin not valid -- not yet spawned\n");
 210                 return;
 211         }
 212         if (host_client->begun)
 213         {
 214                 Con_Print("Begin not valid -- already begun\n");
 215                 return;
 216         }
 217         host_client->begun = true;
 218
 219         // LadyHavoc: note: this code also exists in SV_DropClient
 220         if (sv.loadgame)
 221         {
 222                 int i;
 223                 for (i = 0;i < svs.maxclients;i++)
 224                         if (svs.clients[i].active && !svs.clients[i].spawned)
 225                                 break;
 226                 if (i == svs.maxclients)
 227                 {
 228                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
 229                         sv.paused = sv.loadgame = false; // we're basically done with loading now
 230                 }
 231         }
 232 }
 233
 234 /*
 235 ===============
 236 SV_SetIdealPitch
 237 ===============
 238 */
 239 #define MAX_FORWARD     6
 240 void SV_SetIdealPitch (void)
 241 {
 242         prvm_prog_t *prog = SVVM_prog;
 243         float   angleval, sinval, cosval, step, dir;
 244         trace_t tr;
 245         vec3_t  top, bottom;
 246         float   z[MAX_FORWARD];
 247         int             i, j;
 248         int             steps;
 249
 250         if (!((int)PRVM_serveredictfloat(host_client->edict, flags) & FL_ONGROUND))
 251                 return;
 252
 253         angleval = PRVM_serveredictvector(host_client->edict, angles)[YAW] * M_PI*2 / 360;
 254         sinval = sin(angleval);
 255         cosval = cos(angleval);
 256
 257         for (i=0 ; i<MAX_FORWARD ; i++)
 258         {
 259                 top[0] = PRVM_serveredictvector(host_client->edict, origin)[0] + cosval*(i+3)*12;
 260                 top[1] = PRVM_serveredictvector(host_client->edict, origin)[1] + sinval*(i+3)*12;
 261                 top[2] = PRVM_serveredictvector(host_client->edict, origin)[2] + PRVM_serveredictvector(host_client->edict, view_ofs)[2];
 262
 263                 bottom[0] = top[0];
 264                 bottom[1] = top[1];
 265                 bottom[2] = top[2] - 160;
 266
 267                 tr = SV_TraceLine(top, bottom, MOVE_NOMONSTERS, host_client->edict, SUPERCONTENTS_SOLID, 0, 0, collision_extendmovelength.value);
 268                 // if looking at a wall, leave ideal the way is was
 269                 if (tr.startsolid)
 270                         return;
 271
 272                 // near a dropoff
 273                 if (tr.fraction == 1)
 274                         return;
 275
 276                 z[i] = top[2] + tr.fraction*(bottom[2]-top[2]);
 277         }
 278
 279         dir = 0;
 280         steps = 0;
 281         for (j=1 ; j<i ; j++)
 282         {
 283                 step = z[j] - z[j-1];
 284                 if (step > -ON_EPSILON && step < ON_EPSILON)
 285                         continue;
 286
 287                 // mixed changes
 288                 if (dir && ( step-dir > ON_EPSILON || step-dir < -ON_EPSILON ) )
 289                         return;
 290
 291                 steps++;
 292                 dir = step;
 293         }
 294
 295         if (!dir)
 296         {
 297                 PRVM_serveredictfloat(host_client->edict, idealpitch) = 0;
 298                 return;
 299         }
 300
 301         if (steps < 2)
 302                 return;
 303         PRVM_serveredictfloat(host_client->edict, idealpitch) = -dir * sv_idealpitchscale.value;
 304 }
 305
 306 static vec3_t wishdir, forward, right, up;
 307 static float wishspeed;
 308
 309 static qboolean onground;
 310
 311 /*
 312 ==================
 313 SV_UserFriction
 314
 315 ==================
 316 */
 317 static void SV_UserFriction (void)
 318 {
 319         prvm_prog_t *prog = SVVM_prog;
 320         float speed, newspeed, control, friction;
 321         vec3_t start, stop;
 322         trace_t trace;
 323
 324         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]);
 325         if (!speed)
 326                 return;
 327
 328         // if the leading edge is over a dropoff, increase friction
 329         start[0] = stop[0] = PRVM_serveredictvector(host_client->edict, origin)[0] + PRVM_serveredictvector(host_client->edict, velocity)[0]/speed*16;
 330         start[1] = stop[1] = PRVM_serveredictvector(host_client->edict, origin)[1] + PRVM_serveredictvector(host_client->edict, velocity)[1]/speed*16;
 331         start[2] = PRVM_serveredictvector(host_client->edict, origin)[2] + PRVM_serveredictvector(host_client->edict, mins)[2];
 332         stop[2] = start[2] - 34;
 333
 334         trace = SV_TraceLine(start, stop, MOVE_NOMONSTERS, host_client->edict, SV_GenericHitSuperContentsMask(host_client->edict), 0, 0, collision_extendmovelength.value);
 335
 336         if (trace.fraction == 1.0)
 337                 friction = sv_friction.value*sv_edgefriction.value;
 338         else
 339                 friction = sv_friction.value;
 340
 341         // apply friction
 342         control = speed < sv_stopspeed.value ? sv_stopspeed.value : speed;
 343         newspeed = speed - sv.frametime*control*friction;
 344
 345         if (newspeed < 0)
 346                 newspeed = 0;
 347         else
 348                 newspeed /= speed;
 349
 350         VectorScale(PRVM_serveredictvector(host_client->edict, velocity), newspeed, PRVM_serveredictvector(host_client->edict, velocity));
 351 }
 352
 353 /*
 354 ==============
 355 SV_Accelerate
 356 ==============
 357 */
 358 static void SV_Accelerate (void)
 359 {
 360         prvm_prog_t *prog = SVVM_prog;
 361         int i;
 362         float addspeed, accelspeed, currentspeed;
 363
 364         currentspeed = DotProduct (PRVM_serveredictvector(host_client->edict, velocity), wishdir);
 365         addspeed = wishspeed - currentspeed;
 366         if (addspeed <= 0)
 367                 return;
 368         accelspeed = sv_accelerate.value*sv.frametime*wishspeed;
 369         if (accelspeed > addspeed)
 370                 accelspeed = addspeed;
 371
 372         for (i=0 ; i<3 ; i++)
 373                 PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed*wishdir[i];
 374 }
 375
 376 extern cvar_t sv_gameplayfix_q2airaccelerate;
 377 static void SV_AirAccelerate (vec3_t wishveloc)
 378 {
 379         prvm_prog_t *prog = SVVM_prog;
 380         int i;
 381         float addspeed, wishspd, accelspeed, currentspeed;
 382
 383         wishspd = VectorNormalizeLength (wishveloc);
 384         if (wishspd > sv_maxairspeed.value)
 385                 wishspd = sv_maxairspeed.value;
 386         currentspeed = DotProduct (PRVM_serveredictvector(host_client->edict, velocity), wishveloc);
 387         addspeed = wishspd - currentspeed;
 388         if (addspeed <= 0)
 389                 return;
 390         accelspeed = (sv_airaccelerate.value < 0 ? sv_accelerate.value : sv_airaccelerate.value)*(sv_gameplayfix_q2airaccelerate.integer ? wishspd : wishspeed) * sv.frametime;
 391         if (accelspeed > addspeed)
 392                 accelspeed = addspeed;
 393
 394         for (i=0 ; i<3 ; i++)
 395                 PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed*wishveloc[i];
 396 }
 397
 398
 399 static void DropPunchAngle (void)
 400 {
 401         prvm_prog_t *prog = SVVM_prog;
 402         vec_t len;
 403         vec3_t punchangle, punchvector;
 404
 405         VectorCopy(PRVM_serveredictvector(host_client->edict, punchangle), punchangle);
 406         VectorCopy(PRVM_serveredictvector(host_client->edict, punchvector), punchvector);
 407
 408         len = VectorNormalizeLength(punchangle);
 409         if (len > 0)
 410         {
 411                 len -= 10*sv.frametime;
 412                 if (len < 0)
 413                         len = 0;
 414                 VectorScale(punchangle, len, punchangle);
 415         }
 416
 417         len = VectorNormalizeLength(punchvector);
 418         if (len > 0)
 419         {
 420                 len -= 20*sv.frametime;
 421                 if (len < 0)
 422                         len = 0;
 423                 VectorScale(punchvector, len, punchvector);
 424         }
 425
 426         VectorCopy(punchangle, PRVM_serveredictvector(host_client->edict, punchangle));
 427         VectorCopy(punchvector, PRVM_serveredictvector(host_client->edict, punchvector));
 428 }
 429
 430 /*
 431 ===================
 432 SV_WaterMove
 433
 434 ===================
 435 */
 436 static void SV_WaterMove (void)
 437 {
 438         prvm_prog_t *prog = SVVM_prog;
 439         int i;
 440         vec3_t wishvel, v_angle;
 441         vec_t speed, newspeed, fwishspeed, addspeed, accelspeed, temp;
 442
 443         // user intentions
 444         VectorCopy(PRVM_serveredictvector(host_client->edict, v_angle), v_angle);
 445         AngleVectors(v_angle, forward, right, up);
 446
 447         for (i=0 ; i<3 ; i++)
 448                 wishvel[i] = forward[i]*usercmd.forwardmove + right[i]*usercmd.sidemove;
 449
 450         if (!usercmd.forwardmove && !usercmd.sidemove && !usercmd.upmove)
 451                 wishvel[2] -= 60;               // drift towards bottom
 452         else
 453                 wishvel[2] += usercmd.upmove;
 454
 455         fwishspeed = VectorLength(wishvel);
 456         if (fwishspeed > sv_maxspeed.value)
 457         {
 458                 temp = sv_maxspeed.value/fwishspeed;
 459                 VectorScale (wishvel, temp, wishvel);
 460                 fwishspeed = sv_maxspeed.value;
 461         }
 462         fwishspeed *= 0.7;
 463
 464         // water friction
 465         speed = VectorLength(PRVM_serveredictvector(host_client->edict, velocity));
 466         if (speed)
 467         {
 468                 newspeed = speed - sv.frametime * speed * (sv_waterfriction.value < 0 ? sv_friction.value : sv_waterfriction.value);
 469                 if (newspeed < 0)
 470                         newspeed = 0;
 471                 temp = newspeed/speed;
 472                 VectorScale(PRVM_serveredictvector(host_client->edict, velocity), temp, PRVM_serveredictvector(host_client->edict, velocity));
 473         }
 474         else
 475                 newspeed = 0;
 476
 477         // water acceleration
 478         if (!fwishspeed)
 479                 return;
 480
 481         addspeed = fwishspeed - newspeed;
 482         if (addspeed <= 0)
 483                 return;
 484
 485         VectorNormalize (wishvel);
 486         accelspeed = (sv_wateraccelerate.value < 0 ? sv_accelerate.value : sv_wateraccelerate.value) * fwishspeed * sv.frametime;
 487         if (accelspeed > addspeed)
 488                 accelspeed = addspeed;
 489
 490         for (i=0 ; i<3 ; i++)
 491                 PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed * wishvel[i];
 492 }
 493
 494 static void SV_WaterJump (void)
 495 {
 496         prvm_prog_t *prog = SVVM_prog;
 497         if (sv.time > PRVM_serveredictfloat(host_client->edict, teleport_time) || !PRVM_serveredictfloat(host_client->edict, waterlevel))
 498         {
 499                 PRVM_serveredictfloat(host_client->edict, flags) = (int)PRVM_serveredictfloat(host_client->edict, flags) & ~FL_WATERJUMP;
 500                 PRVM_serveredictfloat(host_client->edict, teleport_time) = 0;
 501         }
 502         PRVM_serveredictvector(host_client->edict, velocity)[0] = PRVM_serveredictvector(host_client->edict, movedir)[0];
 503         PRVM_serveredictvector(host_client->edict, velocity)[1] = PRVM_serveredictvector(host_client->edict, movedir)[1];
 504 }
 505
 506
 507 /*
 508 ===================
 509 SV_AirMove
 510
 511 ===================
 512 */
 513 static void SV_AirMove (void)
 514 {
 515         prvm_prog_t *prog = SVVM_prog;
 516         int i;
 517         vec3_t wishvel;
 518         float fmove, smove, temp;
 519
 520         // LadyHavoc: correct quake movement speed bug when looking up/down
 521         wishvel[0] = wishvel[2] = 0;
 522         wishvel[1] = PRVM_serveredictvector(host_client->edict, angles)[1];
 523         AngleVectors (wishvel, forward, right, up);
 524
 525         fmove = usercmd.forwardmove;
 526         smove = usercmd.sidemove;
 527
 528 // hack to not let you back into teleporter
 529         if (sv.time < PRVM_serveredictfloat(host_client->edict, teleport_time) && fmove < 0)
 530                 fmove = 0;
 531
 532         for (i=0 ; i<3 ; i++)
 533                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 534
 535         if ((int)PRVM_serveredictfloat(host_client->edict, movetype) != MOVETYPE_WALK)
 536                 wishvel[2] += usercmd.upmove;
 537
 538         VectorCopy (wishvel, wishdir);
 539         wishspeed = VectorNormalizeLength(wishdir);
 540         if (wishspeed > sv_maxspeed.value)
 541         {
 542                 temp = sv_maxspeed.value/wishspeed;
 543                 VectorScale (wishvel, temp, wishvel);
 544                 wishspeed = sv_maxspeed.value;
 545         }
 546
 547         if (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_NOCLIP)
 548         {
 549                 // noclip
 550                 VectorCopy (wishvel, PRVM_serveredictvector(host_client->edict, velocity));
 551         }
 552         else if (onground)
 553         {
 554                 SV_UserFriction ();
 555                 SV_Accelerate ();
 556         }
 557         else
 558         {
 559                 // not on ground, so little effect on velocity
 560                 SV_AirAccelerate (wishvel);
 561         }
 562 }
 563
 564 /*
 565 ===================
 566 SV_ClientThink
 567
 568 the move fields specify an intended velocity in pix/sec
 569 the angle fields specify an exact angular motion in degrees
 570 ===================
 571 */
 572 void SV_ClientThink (void)
 573 {
 574         prvm_prog_t *prog = SVVM_prog;
 575         vec3_t v_angle, angles, velocity;
 576
 577         //Con_Printf("clientthink for %ims\n", (int) (sv.frametime * 1000));
 578
 579         SV_ApplyClientMove();
 580         // make sure the velocity is sane (not a NaN)
 581         SV_CheckVelocity(host_client->edict);
 582
 583         // LadyHavoc: QuakeC replacement for SV_ClientThink (player movement)
 584         if (PRVM_serverfunction(SV_PlayerPhysics) && sv_playerphysicsqc.integer)
 585         {
 586                 PRVM_serverglobalfloat(time) = sv.time;
 587                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
 588                 prog->ExecuteProgram(prog, PRVM_serverfunction(SV_PlayerPhysics), "QC function SV_PlayerPhysics is missing");
 589                 SV_CheckVelocity(host_client->edict);
 590                 return;
 591         }
 592
 593         if (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_NONE)
 594                 return;
 595
 596         onground = ((int)PRVM_serveredictfloat(host_client->edict, flags) & FL_ONGROUND) != 0;
 597
 598         DropPunchAngle ();
 599
 600         // if dead, behave differently
 601         if (PRVM_serveredictfloat(host_client->edict, health) <= 0)
 602                 return;
 603
 604         usercmd = host_client->cmd;
 605
 606         // angles
 607         // show 1/3 the pitch angle and all the roll angle
 608         VectorAdd (PRVM_serveredictvector(host_client->edict, v_angle), PRVM_serveredictvector(host_client->edict, punchangle), v_angle);
 609         VectorCopy(PRVM_serveredictvector(host_client->edict, angles), angles);
 610         VectorCopy(PRVM_serveredictvector(host_client->edict, velocity), velocity);
 611         PRVM_serveredictvector(host_client->edict, angles)[ROLL] = Com_CalcRoll (angles, velocity, sv_rollangle.value, sv_rollspeed.value)*4;
 612         if (!PRVM_serveredictfloat(host_client->edict, fixangle))
 613         {
 614                 PRVM_serveredictvector(host_client->edict, angles)[PITCH] = -v_angle[PITCH]/3;
 615                 PRVM_serveredictvector(host_client->edict, angles)[YAW] = v_angle[YAW];
 616         }
 617
 618         if ( (int)PRVM_serveredictfloat(host_client->edict, flags) & FL_WATERJUMP )
 619         {
 620                 SV_WaterJump ();
 621                 SV_CheckVelocity(host_client->edict);
 622                 return;
 623         }
 624
 625         /*
 626         // Player is (somehow) outside of the map, or flying, or noclipping
 627         if (PRVM_serveredictfloat(host_client->edict, movetype) != MOVETYPE_NOCLIP && (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict)))
 628         //if (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_NOCLIP || PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict))
 629         {
 630                 SV_FreeMove ();
 631                 return;
 632         }
 633         */
 634
 635         // walk
 636         if ((PRVM_serveredictfloat(host_client->edict, waterlevel) >= 2) && (PRVM_serveredictfloat(host_client->edict, movetype) != MOVETYPE_NOCLIP))
 637         {
 638                 SV_WaterMove ();
 639                 SV_CheckVelocity(host_client->edict);
 640                 return;
 641         }
 642
 643         SV_AirMove ();
 644         SV_CheckVelocity(host_client->edict);
 645 }
 646
 647 /*
 648 ===================
 649 SV_ReadClientMove
 650 ===================
 651 */
 652 int sv_numreadmoves = 0;
 653 usercmd_t sv_readmoves[CL_MAX_USERCMDS];
 654 static void SV_ReadClientMove (void)
 655 {
 656         prvm_prog_t *prog = SVVM_prog;
 657         int i;
 658         usercmd_t newmove;
 659         usercmd_t *move = &newmove;
 660
 661         memset(move, 0, sizeof(*move));
 662
 663         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 664
 665         // read ping time
 666         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)
 667                 move->sequence = MSG_ReadLong(&sv_message);
 668         move->time = move->clienttime = MSG_ReadFloat(&sv_message);
 669         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 670         move->receivetime = (float)sv.time;
 671
 672 #if DEBUGMOVES
 673         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);
 674 #endif
 675         // limit reported time to current time
 676         // (incase the client is trying to cheat)
 677         move->time = min(move->time, move->receivetime + sv.frametime);
 678
 679         // read current angles
 680         for (i = 0;i < 3;i++)
 681         {
 682                 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)
 683                         move->viewangles[i] = MSG_ReadAngle8i(&sv_message);
 684                 else if (sv.protocol == PROTOCOL_DARKPLACES1)
 685                         move->viewangles[i] = MSG_ReadAngle16i(&sv_message);
 686                 else if (sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3)
 687                         move->viewangles[i] = MSG_ReadAngle32f(&sv_message);
 688                 else
 689                         move->viewangles[i] = MSG_ReadAngle16i(&sv_message);
 690         }
 691         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 692
 693         // read movement
 694         move->forwardmove = MSG_ReadCoord16i(&sv_message);
 695         move->sidemove = MSG_ReadCoord16i(&sv_message);
 696         move->upmove = MSG_ReadCoord16i(&sv_message);
 697         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 698
 699         // read buttons
 700         // be sure to bitwise OR them into the move->buttons because we want to
 701         // accumulate button presses from multiple packets per actual move
 702         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)
 703                 move->buttons = MSG_ReadByte(&sv_message);
 704         else
 705                 move->buttons = MSG_ReadLong(&sv_message);
 706         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 707
 708         // read impulse
 709         move->impulse = MSG_ReadByte(&sv_message);
 710         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 711
 712         // PRYDON_CLIENTCURSOR
 713         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)
 714         {
 715                 // 30 bytes
 716                 move->cursor_screen[0] = MSG_ReadShort(&sv_message) * (1.0f / 32767.0f);
 717                 move->cursor_screen[1] = MSG_ReadShort(&sv_message) * (1.0f / 32767.0f);
 718                 move->cursor_start[0] = MSG_ReadFloat(&sv_message);
 719                 move->cursor_start[1] = MSG_ReadFloat(&sv_message);
 720                 move->cursor_start[2] = MSG_ReadFloat(&sv_message);
 721                 move->cursor_impact[0] = MSG_ReadFloat(&sv_message);
 722                 move->cursor_impact[1] = MSG_ReadFloat(&sv_message);
 723                 move->cursor_impact[2] = MSG_ReadFloat(&sv_message);
 724                 move->cursor_entitynumber = (unsigned short)MSG_ReadShort(&sv_message);
 725                 if (move->cursor_entitynumber >= prog->max_edicts)
 726                 {
 727                         Con_DPrintf("SV_ReadClientMessage: client send bad cursor_entitynumber\n");
 728                         move->cursor_entitynumber = 0;
 729                 }
 730                 // as requested by FrikaC, cursor_trace_ent is reset to world if the
 731                 // entity is free at time of receipt
 732                 if (PRVM_EDICT_NUM(move->cursor_entitynumber)->priv.server->free)
 733                         move->cursor_entitynumber = 0;
 734                 if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 735         }
 736
 737         // if the previous move has not been applied yet, we need to accumulate
 738         // the impulse/buttons from it
 739         if (!host_client->cmd.applied)
 740         {
 741                 if (!move->impulse)
 742                         move->impulse = host_client->cmd.impulse;
 743                 move->buttons |= host_client->cmd.buttons;
 744         }
 745
 746         // now store this move for later execution
 747         // (we have to buffer the moves because of old ones being repeated)
 748         if (sv_numreadmoves < CL_MAX_USERCMDS)
 749                 sv_readmoves[sv_numreadmoves++] = *move;
 750
 751         // movement packet loss tracking
 752         if(move->sequence)
 753         {
 754                 if(move->sequence > host_client->movement_highestsequence_seen)
 755                 {
 756                         if(host_client->movement_highestsequence_seen)
 757                         {
 758                                 // mark moves in between as lost
 759                                 unsigned int delta = move->sequence - host_client->movement_highestsequence_seen - 1;
 760                                 if(delta < NETGRAPH_PACKETS)
 761                                 {
 762                                         unsigned int u;
 763                                         for(u = 0; u < delta; ++u)
 764                                                 host_client->movement_count[(host_client->movement_highestsequence_seen + 1 + u) % NETGRAPH_PACKETS] = -1;
 765                                 }
 766                                 else
 767                                         memset(host_client->movement_count, -1, sizeof(host_client->movement_count));
 768                         }
 769                         // mark THIS move as seen for the first time
 770                         host_client->movement_count[move->sequence % NETGRAPH_PACKETS] = 1;
 771                         // update highest sequence seen
 772                         host_client->movement_highestsequence_seen = move->sequence;
 773                 }
 774                 else
 775                         if(host_client->movement_count[move->sequence % NETGRAPH_PACKETS] >= 0)
 776                                 ++host_client->movement_count[move->sequence % NETGRAPH_PACKETS];
 777         }
 778         else
 779         {
 780                 host_client->movement_highestsequence_seen = 0;
 781                 memset(host_client->movement_count, 0, sizeof(host_client->movement_count));
 782         }
 783 }
 784
 785 static void SV_ExecuteClientMoves(void)
 786 {
 787         prvm_prog_t *prog = SVVM_prog;
 788         int moveindex;
 789         float moveframetime;
 790         double oldframetime;
 791         double oldframetime2;
 792 #ifdef NUM_PING_TIMES
 793         double total;
 794 #endif
 795         if (sv_numreadmoves < 1)
 796                 return;
 797         // only start accepting input once the player is spawned
 798         if (!host_client->begun)
 799                 return;
 800 #if DEBUGMOVES
 801         Con_Printf("SV_ExecuteClientMoves: read %i moves at sv.time %f\n", sv_numreadmoves, (float)sv.time);
 802 #endif
 803         // disable clientside movement prediction in some cases
 804         if (ceil(max(sv_readmoves[sv_numreadmoves-1].receivetime - sv_readmoves[sv_numreadmoves-1].time, 0) * 1000.0) < sv_clmovement_minping.integer)
 805                 host_client->clmovement_disabletimeout = host.realtime + sv_clmovement_minping_disabletime.value / 1000.0;
 806         // several conditions govern whether clientside movement prediction is allowed
 807         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)))))
 808         {
 809                 // process the moves in order and ignore old ones
 810                 // but always trust the latest move
 811                 // (this deals with bogus initial move sequences after level change,
 812                 //  where the client will eventually catch up with the level change
 813                 //  and reset its move sequence)
 814                 for (moveindex = 0;moveindex < sv_numreadmoves;moveindex++)
 815                 {
 816                         usercmd_t *move = sv_readmoves + moveindex;
 817                         if (host_client->movesequence < move->sequence || moveindex == sv_numreadmoves - 1)
 818                         {
 819 #if DEBUGMOVES
 820                                 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);
 821 #endif
 822                                 // this is a new move
 823                                 move->time = bound(sv.time - 1, move->time, sv.time); // prevent slowhack/speedhack combos
 824                                 move->time = max(move->time, host_client->cmd.time); // prevent backstepping of time
 825                                 moveframetime = bound(0, move->time - host_client->cmd.time, min(0.1, sv_clmovement_inputtimeout.value));
 826
 827                                 // discard (treat like lost) moves with too low distance from
 828                                 // the previous one to prevent hacks using float inaccuracy
 829                                 // clients will see this as packet loss in the netgraph
 830                                 // this should also apply if a move cannot get
 831                                 // executed because it came too late and
 832                                 // already was performed serverside
 833                                 if(moveframetime < 0.0005)
 834                                 {
 835                                         // count the move as LOST if we don't
 836                                         // execute it but it has higher
 837                                         // sequence count
 838                                         if(host_client->movesequence)
 839                                                 if(move->sequence > host_client->movesequence)
 840                                                         host_client->movement_count[(move->sequence) % NETGRAPH_PACKETS] = -1;
 841                                         continue;
 842                                 }
 843
 844                                 //Con_Printf("movesequence = %i (%i lost), moveframetime = %f\n", move->sequence, move->sequence ? move->sequence - host_client->movesequence - 1 : 0, moveframetime);
 845                                 host_client->cmd = *move;
 846                                 host_client->movesequence = move->sequence;
 847
 848                                 // if using prediction, we need to perform moves when packets are
 849                                 // received, even if multiple occur in one frame
 850                                 // (they can't go beyond the current time so there is no cheat issue
 851                                 //  with this approach, and if they don't send input for a while they
 852                                 //  start moving anyway, so the longest 'lagaport' possible is
 853                                 //  determined by the sv_clmovement_inputtimeout cvar)
 854                                 if (moveframetime <= 0)
 855                                         continue;
 856                                 oldframetime = PRVM_serverglobalfloat(frametime);
 857                                 oldframetime2 = sv.frametime;
 858                                 // update ping time for qc to see while executing this move
 859                                 host_client->ping = host_client->cmd.receivetime - host_client->cmd.time;
 860                                 // the server and qc frametime values must be changed temporarily
 861                                 PRVM_serverglobalfloat(frametime) = sv.frametime = moveframetime;
 862                                 // if move is more than 50ms, split it into two moves (this matches QWSV behavior and the client prediction)
 863                                 if (sv.frametime > 0.05)
 864                                 {
 865                                         PRVM_serverglobalfloat(frametime) = sv.frametime = moveframetime * 0.5f;
 866                                         SV_Physics_ClientMove();
 867                                 }
 868                                 SV_Physics_ClientMove();
 869                                 sv.frametime = oldframetime2;
 870                                 PRVM_serverglobalfloat(frametime) = oldframetime;
 871                                 host_client->clmovement_inputtimeout = sv_clmovement_inputtimeout.value;
 872                         }
 873                 }
 874         }
 875         else
 876         {
 877                 // try to gather button bits from old moves, but only if their time is
 878                 // advancing (ones with the same timestamp can't be trusted)
 879                 for (moveindex = 0;moveindex < sv_numreadmoves-1;moveindex++)
 880                 {
 881                         usercmd_t *move = sv_readmoves + moveindex;
 882                         if (host_client->cmd.time < move->time)
 883                         {
 884                                 sv_readmoves[sv_numreadmoves-1].buttons |= move->buttons;
 885                                 if (move->impulse)
 886                                         sv_readmoves[sv_numreadmoves-1].impulse = move->impulse;
 887                         }
 888                 }
 889                 // now copy the new move
 890                 host_client->cmd = sv_readmoves[sv_numreadmoves-1];
 891                 host_client->cmd.time = max(host_client->cmd.time, sv.time);
 892                         // physics will run up to sv.time, so allow no predicted moves
 893                         // before that otherwise, there is a speedhack by turning
 894                         // prediction on and off repeatedly on client side because the
 895                         // engine would run BOTH client and server physics for the same
 896                         // time
 897                 host_client->movesequence = 0;
 898                 // make sure that normal physics takes over immediately
 899                 host_client->clmovement_inputtimeout = 0;
 900         }
 901
 902         // calculate average ping time
 903         host_client->ping = host_client->cmd.receivetime - host_client->cmd.clienttime;
 904 #ifdef NUM_PING_TIMES
 905         host_client->ping_times[host_client->num_pings % NUM_PING_TIMES] = host_client->cmd.receivetime - host_client->cmd.clienttime;
 906         host_client->num_pings++;
 907         for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 908                 total += host_client->ping_times[i];
 909         host_client->ping = total / NUM_PING_TIMES;
 910 #endif
 911 }
 912
 913 void SV_ApplyClientMove (void)
 914 {
 915         prvm_prog_t *prog = SVVM_prog;
 916         usercmd_t *move = &host_client->cmd;
 917         int j, movementloss, packetloss;
 918
 919         if (!move->receivetime)
 920                 return;
 921
 922         // note: a move can be applied multiple times if the client packets are
 923         // not coming as often as the physics is executed, and the move must be
 924         // applied before running qc each time because the id1 qc had a bug where
 925         // it clears self.button2 in PlayerJump, causing pogostick behavior if
 926         // moves are not applied every time before calling qc
 927         move->applied = true;
 928
 929         // set the edict fields
 930         PRVM_serveredictfloat(host_client->edict, button0) = move->buttons & 1;
 931         PRVM_serveredictfloat(host_client->edict, button2) = (move->buttons & 2)>>1;
 932         if (move->impulse)
 933                 PRVM_serveredictfloat(host_client->edict, impulse) = move->impulse;
 934         // only send the impulse to qc once
 935         move->impulse = 0;
 936
 937         movementloss = packetloss = 0;
 938         if(host_client->netconnection)
 939         {
 940                 for (j = 0;j < NETGRAPH_PACKETS;j++)
 941                         if (host_client->netconnection->incoming_netgraph[j].unreliablebytes == NETGRAPH_LOSTPACKET)
 942                                 packetloss++;
 943                 for (j = 0;j < NETGRAPH_PACKETS;j++)
 944                         if (host_client->movement_count[j] < 0)
 945                                 movementloss++;
 946         }
 947
 948         VectorCopy(move->viewangles, PRVM_serveredictvector(host_client->edict, v_angle));
 949         PRVM_serveredictfloat(host_client->edict, button3) = ((move->buttons >> 2) & 1);
 950         PRVM_serveredictfloat(host_client->edict, button4) = ((move->buttons >> 3) & 1);
 951         PRVM_serveredictfloat(host_client->edict, button5) = ((move->buttons >> 4) & 1);
 952         PRVM_serveredictfloat(host_client->edict, button6) = ((move->buttons >> 5) & 1);
 953         PRVM_serveredictfloat(host_client->edict, button7) = ((move->buttons >> 6) & 1);
 954         PRVM_serveredictfloat(host_client->edict, button8) = ((move->buttons >> 7) & 1);
 955         PRVM_serveredictfloat(host_client->edict, button9) = ((move->buttons >> 11) & 1);
 956         PRVM_serveredictfloat(host_client->edict, button10) = ((move->buttons >> 12) & 1);
 957         PRVM_serveredictfloat(host_client->edict, button11) = ((move->buttons >> 13) & 1);
 958         PRVM_serveredictfloat(host_client->edict, button12) = ((move->buttons >> 14) & 1);
 959         PRVM_serveredictfloat(host_client->edict, button13) = ((move->buttons >> 15) & 1);
 960         PRVM_serveredictfloat(host_client->edict, button14) = ((move->buttons >> 16) & 1);
 961         PRVM_serveredictfloat(host_client->edict, button15) = ((move->buttons >> 17) & 1);
 962         PRVM_serveredictfloat(host_client->edict, button16) = ((move->buttons >> 18) & 1);
 963         PRVM_serveredictfloat(host_client->edict, buttonuse) = ((move->buttons >> 8) & 1);
 964         PRVM_serveredictfloat(host_client->edict, buttonchat) = ((move->buttons >> 9) & 1);
 965         PRVM_serveredictfloat(host_client->edict, cursor_active) = ((move->buttons >> 10) & 1);
 966         VectorSet(PRVM_serveredictvector(host_client->edict, movement), move->forwardmove, move->sidemove, move->upmove);
 967         VectorCopy(move->cursor_screen, PRVM_serveredictvector(host_client->edict, cursor_screen));
 968         VectorCopy(move->cursor_start, PRVM_serveredictvector(host_client->edict, cursor_trace_start));
 969         VectorCopy(move->cursor_impact, PRVM_serveredictvector(host_client->edict, cursor_trace_endpos));
 970         PRVM_serveredictedict(host_client->edict, cursor_trace_ent) = PRVM_EDICT_TO_PROG(PRVM_EDICT_NUM(move->cursor_entitynumber));
 971         PRVM_serveredictfloat(host_client->edict, ping) = host_client->ping * 1000.0;
 972         PRVM_serveredictfloat(host_client->edict, ping_packetloss) = packetloss / (float) NETGRAPH_PACKETS;
 973         PRVM_serveredictfloat(host_client->edict, ping_movementloss) = movementloss / (float) NETGRAPH_PACKETS;
 974 }
 975
 976 static qboolean SV_FrameLost(int framenum)
 977 {
 978         if (host_client->entitydatabase5)
 979         {
 980                 if (framenum <= host_client->entitydatabase5->latestframenum)
 981                 {
 982                         EntityFrame5_LostFrame(host_client->entitydatabase5, framenum);
 983                         EntityFrameCSQC_LostFrame(host_client, framenum);
 984                         return true;
 985                 }
 986         }
 987         return false;
 988 }
 989
 990 static void SV_FrameAck(int framenum)
 991 {
 992         if (host_client->entitydatabase)
 993                 EntityFrame_AckFrame(host_client->entitydatabase, framenum);
 994         else if (host_client->entitydatabase4)
 995                 EntityFrame4_AckFrame(host_client->entitydatabase4, framenum, true);
 996         else if (host_client->entitydatabase5)
 997                 EntityFrame5_AckFrame(host_client->entitydatabase5, framenum);
 998 }
 999
1000 /*
1001 ===================
1002 SV_ReadClientMessage
1003 ===================
1004 */
1005 void SV_ReadClientMessage(void)
1006 {
1007         prvm_prog_t *prog = SVVM_prog;
1008         int netcmd, num, start;
1009         char *s, *p, *q;
1010
1011         if(sv_autodemo_perclient.integer >= 2)
1012                 SV_WriteDemoMessage(host_client, &(host_client->netconnection->message), true);
1013
1014         //MSG_BeginReading ();
1015         sv_numreadmoves = 0;
1016
1017         for(;;)
1018         {
1019                 if (!host_client->active)
1020                 {
1021                         // a command caused an error
1022                         SV_DropClient (false);
1023                         return;
1024                 }
1025
1026                 if (sv_message.badread)
1027                 {
1028                         Con_Print("SV_ReadClientMessage: badread\n");
1029                         SV_DropClient (false);
1030                         return;
1031                 }
1032
1033                 netcmd = MSG_ReadByte(&sv_message);
1034                 if (netcmd == -1)
1035                 {
1036                         // end of message
1037                         // apply the moves that were read this frame
1038                         SV_ExecuteClientMoves();
1039                         break;
1040                 }
1041
1042                 switch (netcmd)
1043                 {
1044                 default:
1045                         Con_Printf("SV_ReadClientMessage: unknown command char %i (at offset 0x%x)\n", netcmd, sv_message.readcount);
1046                         if (developer_networking.integer)
1047                                 Com_HexDumpToConsole(sv_message.data, sv_message.cursize);
1048                         SV_DropClient (false);
1049                         return;
1050
1051                 case clc_nop:
1052                         break;
1053
1054                 case clc_stringcmd:
1055                         // allow reliable messages now as the client is done with initial loading
1056                         if (host_client->sendsignon == 2)
1057                                 host_client->sendsignon = 0;
1058                         s = MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring));
1059                         q = NULL;
1060                         for(p = s; *p; ++p) switch(*p)
1061                         {
1062                                 case 10:
1063                                 case 13:
1064                                         if(!q)
1065                                                 q = p;
1066                                         break;
1067                                 default:
1068                                         if(q)
1069                                                 goto clc_stringcmd_invalid; // newline seen, THEN something else -> possible exploit
1070                                         break;
1071                         }
1072                         if(q)
1073                                 *q = 0;
1074                         if (strncasecmp(s, "spawn", 5) == 0
1075                          || strncasecmp(s, "begin", 5) == 0
1076                          || strncasecmp(s, "prespawn", 8) == 0)
1077                                 Cmd_ExecuteString (&cmd_serverfromclient, s, src_client, true);
1078                         else if (PRVM_serverfunction(SV_ParseClientCommand))
1079                         {
1080                                 int restorevm_tempstringsbuf_cursize;
1081                                 restorevm_tempstringsbuf_cursize = prog->tempstringsbuf.cursize;
1082                                 PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(prog, s);
1083                                 PRVM_serverglobalfloat(time) = sv.time;
1084                                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
1085                                 prog->ExecuteProgram(prog, PRVM_serverfunction(SV_ParseClientCommand), "QC function SV_ParseClientCommand is missing");
1086                                 prog->tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
1087                         }
1088                         else
1089                                 Cmd_ExecuteString (&cmd_serverfromclient, s, src_client, true);
1090                         break;
1091
1092 clc_stringcmd_invalid:
1093                         Con_Printf("Received invalid stringcmd from %s\n", host_client->name);
1094                         if(developer.integer > 0)
1095                                 Com_HexDumpToConsole((unsigned char *) s, (int)strlen(s));
1096                         break;
1097
1098                 case clc_disconnect:
1099                         SV_DropClient (false); // client wants to disconnect
1100                         return;
1101
1102                 case clc_move:
1103                         SV_ReadClientMove();
1104                         break;
1105
1106                 case clc_ackdownloaddata:
1107                         start = MSG_ReadLong(&sv_message);
1108                         num = MSG_ReadShort(&sv_message);
1109                         if (host_client->download_file && host_client->download_started)
1110                         {
1111                                 if (host_client->download_expectedposition == start)
1112                                 {
1113                                         int size = (int)FS_FileSize(host_client->download_file);
1114                                         // a data block was successfully received by the client,
1115                                         // update the expected position on the next data block
1116                                         host_client->download_expectedposition = start + num;
1117                                         // if this was the last data block of the file, it's done
1118                                         if (host_client->download_expectedposition >= FS_FileSize(host_client->download_file))
1119                                         {
1120                                                 // tell the client that the download finished
1121                                                 // we need to calculate the crc now
1122                                                 //
1123                                                 // note: at this point the OS probably has the file
1124                                                 // entirely in memory, so this is a faster operation
1125                                                 // now than it was when the download started.
1126                                                 //
1127                                                 // it is also preferable to do this at the end of the
1128                                                 // download rather than the start because it reduces
1129                                                 // potential for Denial Of Service attacks against the
1130                                                 // server.
1131                                                 int crc;
1132                                                 unsigned char *temp;
1133                                                 FS_Seek(host_client->download_file, 0, SEEK_SET);
1134                                                 temp = (unsigned char *) Mem_Alloc(tempmempool, size);
1135                                                 FS_Read(host_client->download_file, temp, size);
1136                                                 crc = CRC_Block(temp, size);
1137                                                 Mem_Free(temp);
1138                                                 // calculated crc, send the file info to the client
1139                                                 // (so that it can verify the data)
1140                                                 SV_ClientCommands("\ncl_downloadfinished %i %i %s\n", size, crc, host_client->download_name);
1141                                                 Con_DPrintf("Download of %s by %s has finished\n", host_client->download_name, host_client->name);
1142                                                 FS_Close(host_client->download_file);
1143                                                 host_client->download_file = NULL;
1144                                                 host_client->download_name[0] = 0;
1145                                                 host_client->download_expectedposition = 0;
1146                                                 host_client->download_started = false;
1147                                         }
1148                                 }
1149                                 else
1150                                 {
1151                                         // a data block was lost, reset to the expected position
1152                                         // and resume sending from there
1153                                         FS_Seek(host_client->download_file, host_client->download_expectedposition, SEEK_SET);
1154                                 }
1155                         }
1156                         break;
1157
1158                 case clc_ackframe:
1159                         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
1160                         num = MSG_ReadLong(&sv_message);
1161                         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
1162                         if (developer_networkentities.integer >= 10)
1163                                 Con_Printf("recv clc_ackframe %i\n", num);
1164                         // if the client hasn't progressed through signons yet,
1165                         // ignore any clc_ackframes we get (they're probably from the
1166                         // previous level)
1167                         if (host_client->begun && host_client->latestframenum < num)
1168                         {
1169                                 int i;
1170                                 for (i = host_client->latestframenum + 1;i < num;i++)
1171                                         if (!SV_FrameLost(i))
1172                                                 break;
1173                                 SV_FrameAck(num);
1174                                 host_client->latestframenum = num;
1175                         }
1176                         break;
1177                 }
1178         }
1179 }
1180