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                 Con_Printf("%s connected\n", host_client->name);
 117
 118                 PRVM_serverglobalfloat(time) = sv.time;
 119                 prog->ExecuteProgram(prog, PRVM_serverfunction(PutClientInServer), "QC function PutClientInServer is missing");
 120         }
 121
 122         if (!host_client->netconnection)
 123                 return;
 124
 125         // send time of update
 126         MSG_WriteByte (&host_client->netconnection->message, svc_time);
 127         MSG_WriteFloat (&host_client->netconnection->message, sv.time);
 128
 129         // send all current names, colors, and frag counts
 130         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
 131         {
 132                 if (!client->active)
 133                         continue;
 134                 MSG_WriteByte (&host_client->netconnection->message, svc_updatename);
 135                 MSG_WriteByte (&host_client->netconnection->message, i);
 136                 MSG_WriteString (&host_client->netconnection->message, client->name);
 137                 MSG_WriteByte (&host_client->netconnection->message, svc_updatefrags);
 138                 MSG_WriteByte (&host_client->netconnection->message, i);
 139                 MSG_WriteShort (&host_client->netconnection->message, client->frags);
 140                 MSG_WriteByte (&host_client->netconnection->message, svc_updatecolors);
 141                 MSG_WriteByte (&host_client->netconnection->message, i);
 142                 MSG_WriteByte (&host_client->netconnection->message, client->colors);
 143         }
 144
 145         // send all current light styles
 146         for (i=0 ; i<MAX_LIGHTSTYLES ; i++)
 147         {
 148                 if (sv.lightstyles[i][0])
 149                 {
 150                         MSG_WriteByte (&host_client->netconnection->message, svc_lightstyle);
 151                         MSG_WriteByte (&host_client->netconnection->message, (char)i);
 152                         MSG_WriteString (&host_client->netconnection->message, sv.lightstyles[i]);
 153                 }
 154         }
 155
 156         // send some stats
 157         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 158         MSG_WriteByte (&host_client->netconnection->message, STAT_TOTALSECRETS);
 159         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(total_secrets));
 160
 161         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 162         MSG_WriteByte (&host_client->netconnection->message, STAT_TOTALMONSTERS);
 163         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(total_monsters));
 164
 165         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 166         MSG_WriteByte (&host_client->netconnection->message, STAT_SECRETS);
 167         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(found_secrets));
 168
 169         MSG_WriteByte (&host_client->netconnection->message, svc_updatestat);
 170         MSG_WriteByte (&host_client->netconnection->message, STAT_MONSTERS);
 171         MSG_WriteLong (&host_client->netconnection->message, (int)PRVM_serverglobalfloat(killed_monsters));
 172
 173         // send a fixangle
 174         // Never send a roll angle, because savegames can catch the server
 175         // in a state where it is expecting the client to correct the angle
 176         // and it won't happen if the game was just loaded, so you wind up
 177         // with a permanent head tilt
 178         if (sv.loadgame)
 179         {
 180                 MSG_WriteByte (&host_client->netconnection->message, svc_setangle);
 181                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, v_angle)[0], sv.protocol);
 182                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, v_angle)[1], sv.protocol);
 183                 MSG_WriteAngle (&host_client->netconnection->message, 0, sv.protocol);
 184         }
 185         else
 186         {
 187                 MSG_WriteByte (&host_client->netconnection->message, svc_setangle);
 188                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, angles)[0], sv.protocol);
 189                 MSG_WriteAngle (&host_client->netconnection->message, PRVM_serveredictvector(host_client->edict, angles)[1], sv.protocol);
 190                 MSG_WriteAngle (&host_client->netconnection->message, 0, sv.protocol);
 191         }
 192
 193         SV_WriteClientdataToMessage (host_client, host_client->edict, &host_client->netconnection->message, stats);
 194
 195         MSG_WriteByte (&host_client->netconnection->message, svc_signonnum);
 196         MSG_WriteByte (&host_client->netconnection->message, 3);
 197 }
 198
 199 /*
 200 ==================
 201 SV_Begin_f
 202 ==================
 203 */
 204 void SV_Begin_f(cmd_state_t *cmd)
 205 {
 206         if (!host_client->spawned)
 207         {
 208                 Con_Print("Begin not valid -- not yet spawned\n");
 209                 return;
 210         }
 211         if (host_client->begun)
 212         {
 213                 Con_Print("Begin not valid -- already begun\n");
 214                 return;
 215         }
 216         host_client->begun = true;
 217
 218         // LadyHavoc: note: this code also exists in SV_DropClient
 219         if (sv.loadgame)
 220         {
 221                 int i;
 222                 for (i = 0;i < svs.maxclients;i++)
 223                         if (svs.clients[i].active && !svs.clients[i].spawned)
 224                                 break;
 225                 if (i == svs.maxclients)
 226                 {
 227                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
 228                         sv.paused = sv.loadgame = false; // we're basically done with loading now
 229                 }
 230         }
 231 }
 232
 233 /*
 234 ===============
 235 SV_SetIdealPitch
 236 ===============
 237 */
 238 #define MAX_FORWARD     6
 239 void SV_SetIdealPitch (void)
 240 {
 241         prvm_prog_t *prog = SVVM_prog;
 242         float   angleval, sinval, cosval, step, dir;
 243         trace_t tr;
 244         vec3_t  top, bottom;
 245         float   z[MAX_FORWARD];
 246         int             i, j;
 247         int             steps;
 248
 249         if (!((int)PRVM_serveredictfloat(host_client->edict, flags) & FL_ONGROUND))
 250                 return;
 251
 252         angleval = PRVM_serveredictvector(host_client->edict, angles)[YAW] * M_PI*2 / 360;
 253         sinval = sin(angleval);
 254         cosval = cos(angleval);
 255
 256         for (i=0 ; i<MAX_FORWARD ; i++)
 257         {
 258                 top[0] = PRVM_serveredictvector(host_client->edict, origin)[0] + cosval*(i+3)*12;
 259                 top[1] = PRVM_serveredictvector(host_client->edict, origin)[1] + sinval*(i+3)*12;
 260                 top[2] = PRVM_serveredictvector(host_client->edict, origin)[2] + PRVM_serveredictvector(host_client->edict, view_ofs)[2];
 261
 262                 bottom[0] = top[0];
 263                 bottom[1] = top[1];
 264                 bottom[2] = top[2] - 160;
 265
 266                 tr = SV_TraceLine(top, bottom, MOVE_NOMONSTERS, host_client->edict, SUPERCONTENTS_SOLID, 0, 0, collision_extendmovelength.value);
 267                 // if looking at a wall, leave ideal the way is was
 268                 if (tr.startsolid)
 269                         return;
 270
 271                 // near a dropoff
 272                 if (tr.fraction == 1)
 273                         return;
 274
 275                 z[i] = top[2] + tr.fraction*(bottom[2]-top[2]);
 276         }
 277
 278         dir = 0;
 279         steps = 0;
 280         for (j=1 ; j<i ; j++)
 281         {
 282                 step = z[j] - z[j-1];
 283                 if (step > -ON_EPSILON && step < ON_EPSILON)
 284                         continue;
 285
 286                 // mixed changes
 287                 if (dir && ( step-dir > ON_EPSILON || step-dir < -ON_EPSILON ) )
 288                         return;
 289
 290                 steps++;
 291                 dir = step;
 292         }
 293
 294         if (!dir)
 295         {
 296                 PRVM_serveredictfloat(host_client->edict, idealpitch) = 0;
 297                 return;
 298         }
 299
 300         if (steps < 2)
 301                 return;
 302         PRVM_serveredictfloat(host_client->edict, idealpitch) = -dir * sv_idealpitchscale.value;
 303 }
 304
 305 static vec3_t wishdir, forward, right, up;
 306 static float wishspeed;
 307
 308 static qbool onground;
 309
 310 /*
 311 ==================
 312 SV_UserFriction
 313
 314 ==================
 315 */
 316 static void SV_UserFriction (void)
 317 {
 318         prvm_prog_t *prog = SVVM_prog;
 319         float speed, newspeed, control, friction;
 320         vec3_t start, stop;
 321         trace_t trace;
 322
 323         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]);
 324         if (!speed)
 325                 return;
 326
 327         // if the leading edge is over a dropoff, increase friction
 328         start[0] = stop[0] = PRVM_serveredictvector(host_client->edict, origin)[0] + PRVM_serveredictvector(host_client->edict, velocity)[0]/speed*16;
 329         start[1] = stop[1] = PRVM_serveredictvector(host_client->edict, origin)[1] + PRVM_serveredictvector(host_client->edict, velocity)[1]/speed*16;
 330         start[2] = PRVM_serveredictvector(host_client->edict, origin)[2] + PRVM_serveredictvector(host_client->edict, mins)[2];
 331         stop[2] = start[2] - 34;
 332
 333         trace = SV_TraceLine(start, stop, MOVE_NOMONSTERS, host_client->edict, SV_GenericHitSuperContentsMask(host_client->edict), 0, 0, collision_extendmovelength.value);
 334
 335         if (trace.fraction == 1.0)
 336                 friction = sv_friction.value*sv_edgefriction.value;
 337         else
 338                 friction = sv_friction.value;
 339
 340         // apply friction
 341         control = speed < sv_stopspeed.value ? sv_stopspeed.value : speed;
 342         newspeed = speed - sv.frametime*control*friction;
 343
 344         if (newspeed < 0)
 345                 newspeed = 0;
 346         else
 347                 newspeed /= speed;
 348
 349         VectorScale(PRVM_serveredictvector(host_client->edict, velocity), newspeed, PRVM_serveredictvector(host_client->edict, velocity));
 350 }
 351
 352 /*
 353 ==============
 354 SV_Accelerate
 355 ==============
 356 */
 357 static void SV_Accelerate (void)
 358 {
 359         prvm_prog_t *prog = SVVM_prog;
 360         int i;
 361         float addspeed, accelspeed, currentspeed;
 362
 363         currentspeed = DotProduct (PRVM_serveredictvector(host_client->edict, velocity), wishdir);
 364         addspeed = wishspeed - currentspeed;
 365         if (addspeed <= 0)
 366                 return;
 367         accelspeed = sv_accelerate.value*sv.frametime*wishspeed;
 368         if (accelspeed > addspeed)
 369                 accelspeed = addspeed;
 370
 371         for (i=0 ; i<3 ; i++)
 372                 PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed*wishdir[i];
 373 }
 374
 375 extern cvar_t sv_gameplayfix_q2airaccelerate;
 376 static void SV_AirAccelerate (vec3_t wishveloc)
 377 {
 378         prvm_prog_t *prog = SVVM_prog;
 379         int i;
 380         float addspeed, wishspd, accelspeed, currentspeed;
 381
 382         wishspd = VectorNormalizeLength (wishveloc);
 383         if (wishspd > sv_maxairspeed.value)
 384                 wishspd = sv_maxairspeed.value;
 385         currentspeed = DotProduct (PRVM_serveredictvector(host_client->edict, velocity), wishveloc);
 386         addspeed = wishspd - currentspeed;
 387         if (addspeed <= 0)
 388                 return;
 389         accelspeed = (sv_airaccelerate.value < 0 ? sv_accelerate.value : sv_airaccelerate.value)*(sv_gameplayfix_q2airaccelerate.integer ? wishspd : wishspeed) * sv.frametime;
 390         if (accelspeed > addspeed)
 391                 accelspeed = addspeed;
 392
 393         for (i=0 ; i<3 ; i++)
 394                 PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed*wishveloc[i];
 395 }
 396
 397
 398 static void DropPunchAngle (void)
 399 {
 400         prvm_prog_t *prog = SVVM_prog;
 401         vec_t len;
 402         vec3_t punchangle, punchvector;
 403
 404         VectorCopy(PRVM_serveredictvector(host_client->edict, punchangle), punchangle);
 405         VectorCopy(PRVM_serveredictvector(host_client->edict, punchvector), punchvector);
 406
 407         len = VectorNormalizeLength(punchangle);
 408         if (len > 0)
 409         {
 410                 len -= 10*sv.frametime;
 411                 if (len < 0)
 412                         len = 0;
 413                 VectorScale(punchangle, len, punchangle);
 414         }
 415
 416         len = VectorNormalizeLength(punchvector);
 417         if (len > 0)
 418         {
 419                 len -= 20*sv.frametime;
 420                 if (len < 0)
 421                         len = 0;
 422                 VectorScale(punchvector, len, punchvector);
 423         }
 424
 425         VectorCopy(punchangle, PRVM_serveredictvector(host_client->edict, punchangle));
 426         VectorCopy(punchvector, PRVM_serveredictvector(host_client->edict, punchvector));
 427 }
 428
 429 /*
 430 ===================
 431 SV_WaterMove
 432
 433 ===================
 434 */
 435 static void SV_WaterMove (void)
 436 {
 437         prvm_prog_t *prog = SVVM_prog;
 438         int i;
 439         vec3_t wishvel, v_angle;
 440         vec_t speed, newspeed, fwishspeed, addspeed, accelspeed, temp;
 441
 442         // user intentions
 443         VectorCopy(PRVM_serveredictvector(host_client->edict, v_angle), v_angle);
 444         AngleVectors(v_angle, forward, right, up);
 445
 446         for (i=0 ; i<3 ; i++)
 447                 wishvel[i] = forward[i]*usercmd.forwardmove + right[i]*usercmd.sidemove;
 448
 449         if (!usercmd.forwardmove && !usercmd.sidemove && !usercmd.upmove)
 450                 wishvel[2] -= 60;               // drift towards bottom
 451         else
 452                 wishvel[2] += usercmd.upmove;
 453
 454         fwishspeed = VectorLength(wishvel);
 455         if (fwishspeed > sv_maxspeed.value)
 456         {
 457                 temp = sv_maxspeed.value/fwishspeed;
 458                 VectorScale (wishvel, temp, wishvel);
 459                 fwishspeed = sv_maxspeed.value;
 460         }
 461         fwishspeed *= 0.7;
 462
 463         // water friction
 464         speed = VectorLength(PRVM_serveredictvector(host_client->edict, velocity));
 465         if (speed)
 466         {
 467                 newspeed = speed - sv.frametime * speed * (sv_waterfriction.value < 0 ? sv_friction.value : sv_waterfriction.value);
 468                 if (newspeed < 0)
 469                         newspeed = 0;
 470                 temp = newspeed/speed;
 471                 VectorScale(PRVM_serveredictvector(host_client->edict, velocity), temp, PRVM_serveredictvector(host_client->edict, velocity));
 472         }
 473         else
 474                 newspeed = 0;
 475
 476         // water acceleration
 477         if (!fwishspeed)
 478                 return;
 479
 480         addspeed = fwishspeed - newspeed;
 481         if (addspeed <= 0)
 482                 return;
 483
 484         VectorNormalize (wishvel);
 485         accelspeed = (sv_wateraccelerate.value < 0 ? sv_accelerate.value : sv_wateraccelerate.value) * fwishspeed * sv.frametime;
 486         if (accelspeed > addspeed)
 487                 accelspeed = addspeed;
 488
 489         for (i=0 ; i<3 ; i++)
 490                 PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed * wishvel[i];
 491 }
 492
 493 static void SV_WaterJump (void)
 494 {
 495         prvm_prog_t *prog = SVVM_prog;
 496         if (sv.time > PRVM_serveredictfloat(host_client->edict, teleport_time) || !PRVM_serveredictfloat(host_client->edict, waterlevel))
 497         {
 498                 PRVM_serveredictfloat(host_client->edict, flags) = (int)PRVM_serveredictfloat(host_client->edict, flags) & ~FL_WATERJUMP;
 499                 PRVM_serveredictfloat(host_client->edict, teleport_time) = 0;
 500         }
 501         PRVM_serveredictvector(host_client->edict, velocity)[0] = PRVM_serveredictvector(host_client->edict, movedir)[0];
 502         PRVM_serveredictvector(host_client->edict, velocity)[1] = PRVM_serveredictvector(host_client->edict, movedir)[1];
 503 }
 504
 505
 506 /*
 507 ===================
 508 SV_AirMove
 509
 510 ===================
 511 */
 512 static void SV_AirMove (void)
 513 {
 514         prvm_prog_t *prog = SVVM_prog;
 515         int i;
 516         vec3_t wishvel;
 517         float fmove, smove, temp;
 518
 519         // LadyHavoc: correct quake movement speed bug when looking up/down
 520         wishvel[0] = wishvel[2] = 0;
 521         wishvel[1] = PRVM_serveredictvector(host_client->edict, angles)[1];
 522         AngleVectors (wishvel, forward, right, up);
 523
 524         fmove = usercmd.forwardmove;
 525         smove = usercmd.sidemove;
 526
 527 // hack to not let you back into teleporter
 528         if (sv.time < PRVM_serveredictfloat(host_client->edict, teleport_time) && fmove < 0)
 529                 fmove = 0;
 530
 531         for (i=0 ; i<3 ; i++)
 532                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 533
 534         if ((int)PRVM_serveredictfloat(host_client->edict, movetype) != MOVETYPE_WALK)
 535                 wishvel[2] += usercmd.upmove;
 536
 537         VectorCopy (wishvel, wishdir);
 538         wishspeed = VectorNormalizeLength(wishdir);
 539         if (wishspeed > sv_maxspeed.value)
 540         {
 541                 temp = sv_maxspeed.value/wishspeed;
 542                 VectorScale (wishvel, temp, wishvel);
 543                 wishspeed = sv_maxspeed.value;
 544         }
 545
 546         if (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_NOCLIP)
 547         {
 548                 // noclip
 549                 VectorCopy (wishvel, PRVM_serveredictvector(host_client->edict, velocity));
 550         }
 551         else if (onground)
 552         {
 553                 SV_UserFriction ();
 554                 SV_Accelerate ();
 555         }
 556         else
 557         {
 558                 // not on ground, so little effect on velocity
 559                 SV_AirAccelerate (wishvel);
 560         }
 561 }
 562
 563 /*
 564 ===================
 565 SV_PlayerPhysics
 566
 567 the move fields specify an intended velocity in pix/sec
 568 the angle fields specify an exact angular motion in degrees
 569 ===================
 570 */
 571 void SV_PlayerPhysics (void)
 572 {
 573         prvm_prog_t *prog = SVVM_prog;
 574         vec3_t v_angle, angles, velocity;
 575
 576         //Con_Printf("clientthink for %ims\n", (int) (sv.frametime * 1000));
 577
 578         SV_ApplyClientMove();
 579         // make sure the velocity is sane (not a NaN)
 580         SV_CheckVelocity(host_client->edict);
 581
 582         // LadyHavoc: QuakeC replacement for SV_PlayerPhysics (player movement)
 583         if (PRVM_serverfunction(SV_PlayerPhysics) && sv_playerphysicsqc.integer)
 584         {
 585                 PRVM_serverglobalfloat(time) = sv.time;
 586                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
 587                 prog->ExecuteProgram(prog, PRVM_serverfunction(SV_PlayerPhysics), "QC function SV_PlayerPhysics is missing");
 588                 SV_CheckVelocity(host_client->edict);
 589                 return;
 590         }
 591
 592         if (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_NONE)
 593                 return;
 594
 595         onground = ((int)PRVM_serveredictfloat(host_client->edict, flags) & FL_ONGROUND) != 0;
 596
 597         DropPunchAngle ();
 598
 599         // if dead, behave differently
 600         if (PRVM_serveredictfloat(host_client->edict, health) <= 0)
 601                 return;
 602
 603         usercmd = host_client->cmd;
 604
 605         // angles
 606         // show 1/3 the pitch angle and all the roll angle
 607         VectorAdd (PRVM_serveredictvector(host_client->edict, v_angle), PRVM_serveredictvector(host_client->edict, punchangle), v_angle);
 608         VectorCopy(PRVM_serveredictvector(host_client->edict, angles), angles);
 609         VectorCopy(PRVM_serveredictvector(host_client->edict, velocity), velocity);
 610         PRVM_serveredictvector(host_client->edict, angles)[ROLL] = Com_CalcRoll (angles, velocity, sv_rollangle.value, sv_rollspeed.value)*4;
 611         if (!PRVM_serveredictfloat(host_client->edict, fixangle))
 612         {
 613                 PRVM_serveredictvector(host_client->edict, angles)[PITCH] = -v_angle[PITCH]/3;
 614                 PRVM_serveredictvector(host_client->edict, angles)[YAW] = v_angle[YAW];
 615         }
 616
 617         if ( (int)PRVM_serveredictfloat(host_client->edict, flags) & FL_WATERJUMP )
 618         {
 619                 SV_WaterJump ();
 620                 SV_CheckVelocity(host_client->edict);
 621                 return;
 622         }
 623
 624         // walk
 625         if ((PRVM_serveredictfloat(host_client->edict, waterlevel) >= 2) && (PRVM_serveredictfloat(host_client->edict, movetype) != MOVETYPE_NOCLIP))
 626         {
 627                 SV_WaterMove ();
 628                 SV_CheckVelocity(host_client->edict);
 629                 return;
 630         }
 631
 632         SV_AirMove ();
 633         SV_CheckVelocity(host_client->edict);
 634 }
 635
 636 /*
 637 ===================
 638 SV_ReadClientMove
 639 ===================
 640 */
 641 int sv_numreadmoves = 0;
 642 usercmd_t sv_readmoves[CL_MAX_USERCMDS];
 643 static void SV_ReadClientMove (void)
 644 {
 645         prvm_prog_t *prog = SVVM_prog;
 646         int i;
 647         usercmd_t newmove;
 648         usercmd_t *move = &newmove;
 649
 650         memset(move, 0, sizeof(*move));
 651
 652         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 653
 654         // read ping time
 655         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)
 656                 move->sequence = MSG_ReadLong(&sv_message);
 657         move->time = MSG_ReadFloat(&sv_message);
 658         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 659         move->receivetime = (float)sv.time;
 660
 661 #if DEBUGMOVES
 662         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);
 663 #endif
 664         // limit reported time to current time
 665         // (incase the client is trying to cheat)
 666         move->time = min(move->time, sv.time + sv.frametime);
 667
 668         // read current angles
 669         for (i = 0;i < 3;i++)
 670         {
 671                 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)
 672                         move->viewangles[i] = MSG_ReadAngle8i(&sv_message);
 673                 else if (sv.protocol == PROTOCOL_DARKPLACES1)
 674                         move->viewangles[i] = MSG_ReadAngle16i(&sv_message);
 675                 else if (sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3)
 676                         move->viewangles[i] = MSG_ReadAngle32f(&sv_message);
 677                 else
 678                         move->viewangles[i] = MSG_ReadAngle16i(&sv_message);
 679         }
 680         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 681
 682         // read movement
 683         move->forwardmove = MSG_ReadCoord16i(&sv_message);
 684         move->sidemove = MSG_ReadCoord16i(&sv_message);
 685         move->upmove = MSG_ReadCoord16i(&sv_message);
 686         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 687
 688         // read buttons
 689         // be sure to bitwise OR them into the move->buttons because we want to
 690         // accumulate button presses from multiple packets per actual move
 691         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)
 692                 move->buttons = MSG_ReadByte(&sv_message);
 693         else
 694                 move->buttons = MSG_ReadLong(&sv_message);
 695         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 696
 697         // read impulse
 698         move->impulse = MSG_ReadByte(&sv_message);
 699         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 700
 701         // PRYDON_CLIENTCURSOR
 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         {
 704                 // 30 bytes
 705                 move->cursor_screen[0] = MSG_ReadShort(&sv_message) * (1.0f / 32767.0f);
 706                 move->cursor_screen[1] = MSG_ReadShort(&sv_message) * (1.0f / 32767.0f);
 707                 move->cursor_start[0] = MSG_ReadFloat(&sv_message);
 708                 move->cursor_start[1] = MSG_ReadFloat(&sv_message);
 709                 move->cursor_start[2] = MSG_ReadFloat(&sv_message);
 710                 move->cursor_impact[0] = MSG_ReadFloat(&sv_message);
 711                 move->cursor_impact[1] = MSG_ReadFloat(&sv_message);
 712                 move->cursor_impact[2] = MSG_ReadFloat(&sv_message);
 713                 move->cursor_entitynumber = (unsigned short)MSG_ReadShort(&sv_message);
 714                 if (move->cursor_entitynumber >= prog->max_edicts)
 715                 {
 716                         Con_DPrintf("SV_ReadClientMessage: client send bad cursor_entitynumber\n");
 717                         move->cursor_entitynumber = 0;
 718                 }
 719                 // as requested by FrikaC, cursor_trace_ent is reset to world if the
 720                 // entity is free at time of receipt
 721                 if (PRVM_EDICT_NUM(move->cursor_entitynumber)->priv.server->free)
 722                         move->cursor_entitynumber = 0;
 723                 if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 724         }
 725
 726         // if the previous move has not been applied yet, we need to accumulate
 727         // the impulse/buttons from it
 728         if (!host_client->cmd.applied)
 729         {
 730                 if (!move->impulse)
 731                         move->impulse = host_client->cmd.impulse;
 732                 move->buttons |= host_client->cmd.buttons;
 733         }
 734
 735         // now store this move for later execution
 736         // (we have to buffer the moves because of old ones being repeated)
 737         if (sv_numreadmoves < CL_MAX_USERCMDS)
 738                 sv_readmoves[sv_numreadmoves++] = *move;
 739
 740         // movement packet loss tracking
 741         // bones_was_here: checking begun prevents heavy loss detection right after a map change
 742         if(move->sequence && host_client->begun)
 743         {
 744                 if(move->sequence > host_client->movement_highestsequence_seen)
 745                 {
 746                         if(host_client->movement_highestsequence_seen)
 747                         {
 748                                 // mark moves in between as lost
 749                                 unsigned int delta = move->sequence - host_client->movement_highestsequence_seen - 1;
 750                                 if(delta < NETGRAPH_PACKETS)
 751                                 {
 752                                         unsigned int u;
 753                                         for(u = 0; u < delta; ++u)
 754                                                 host_client->movement_count[(host_client->movement_highestsequence_seen + 1 + u) % NETGRAPH_PACKETS] = -1;
 755                                 }
 756                                 else
 757                                         memset(host_client->movement_count, -1, sizeof(host_client->movement_count));
 758                         }
 759                         // mark THIS move as seen for the first time
 760                         host_client->movement_count[move->sequence % NETGRAPH_PACKETS] = 1;
 761                         // update highest sequence seen
 762                         host_client->movement_highestsequence_seen = move->sequence;
 763                 }
 764                 else
 765                         if(host_client->movement_count[move->sequence % NETGRAPH_PACKETS] >= 0)
 766                                 ++host_client->movement_count[move->sequence % NETGRAPH_PACKETS];
 767         }
 768         else
 769         {
 770                 host_client->movement_highestsequence_seen = 0;
 771                 memset(host_client->movement_count, 0, sizeof(host_client->movement_count));
 772         }
 773 }
 774
 775 static void SV_ExecuteClientMoves(void)
 776 {
 777         prvm_prog_t *prog = SVVM_prog;
 778         int moveindex;
 779         double moveframetime;
 780         double oldframetime;
 781         double oldframetime2;
 782
 783         if (sv_numreadmoves < 1)
 784                 return;
 785         // only start accepting input once the player is spawned
 786         if (!host_client->begun)
 787                 return;
 788 #if DEBUGMOVES
 789         Con_Printf("SV_ExecuteClientMoves: read %i moves at sv.time %f\n", sv_numreadmoves, (float)sv.time);
 790 #endif
 791         // disable clientside movement prediction in some cases
 792         if (ceil(max(sv_readmoves[sv_numreadmoves-1].receivetime - sv_readmoves[sv_numreadmoves-1].time, 0) * 1000.0) < sv_clmovement_minping.integer)
 793                 host_client->clmovement_disabletimeout = host.realtime + sv_clmovement_minping_disabletime.value / 1000.0;
 794         // several conditions govern whether clientside movement prediction is allowed
 795         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)))))
 796         {
 797                 // process the moves in order and ignore old ones
 798                 // but always trust the latest move
 799                 // (this deals with bogus initial move sequences after level change,
 800                 //  where the client will eventually catch up with the level change
 801                 //  and reset its move sequence)
 802                 for (moveindex = 0;moveindex < sv_numreadmoves;moveindex++)
 803                 {
 804                         usercmd_t *move = sv_readmoves + moveindex;
 805                         if (host_client->movesequence < move->sequence || moveindex == sv_numreadmoves - 1)
 806                         {
 807 #if DEBUGMOVES
 808                                 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);
 809 #endif
 810                                 // this is a new move
 811                                 move->time = bound(sv.time - 1, move->time, sv.time); // prevent slowhack/speedhack combos
 812                                 move->time = max(move->time, host_client->cmd.time); // prevent backstepping of time
 813                                 // bones_was_here: limit moveframetime to a multiple of sv.frametime to match inputtimeout behaviour
 814                                 moveframetime = min(move->time - host_client->cmd.time, min(0.1, sys_ticrate.value > 0.0 && sv.frametime ? sv.frametime * ceil(sv_clmovement_inputtimeout.value / sv.frametime) : sv_clmovement_inputtimeout.value));
 815
 816
 817                                 // discard (treat like lost) moves with too low distance from
 818                                 // the previous one to prevent hacks using float inaccuracy
 819                                 // clients will see this as packet loss in the netgraph
 820                                 // this should also apply if a move cannot get
 821                                 // executed because it came too late and
 822                                 // already was performed serverside
 823                                 if(moveframetime < 0.0005)
 824                                 {
 825                                         // count the move as LOST if we don't
 826                                         // execute it but it has higher
 827                                         // sequence count
 828                                         if(host_client->movesequence)
 829                                                 if(move->sequence > host_client->movesequence)
 830                                                         host_client->movement_count[(move->sequence) % NETGRAPH_PACKETS] = -1;
 831                                         continue;
 832                                 }
 833
 834                                 //Con_Printf("movesequence = %i (%i lost), moveframetime = %f\n", move->sequence, move->sequence ? move->sequence - host_client->movesequence - 1 : 0, moveframetime);
 835                                 host_client->cmd = *move;
 836                                 host_client->movesequence = move->sequence;
 837
 838                                 // if using prediction, we need to perform moves when packets are
 839                                 // received, even if multiple occur in one frame
 840                                 // (they can't go beyond the current time so there is no cheat issue
 841                                 //  with this approach, and if they don't send input for a while they
 842                                 //  start moving anyway, so the longest 'lagaport' possible is
 843                                 //  determined by the sv_clmovement_inputtimeout cvar)
 844                                 oldframetime = PRVM_serverglobalfloat(frametime);
 845                                 oldframetime2 = sv.frametime;
 846                                 // update ping time for qc to see while executing this move
 847                                 host_client->ping = host_client->cmd.receivetime - host_client->cmd.time;
 848                                 // the server and qc frametime values must be changed temporarily
 849                                 PRVM_serverglobalfloat(frametime) = sv.frametime = moveframetime;
 850                                 // if move is more than 50ms, split it into two moves (this matches QWSV behavior and the client prediction)
 851                                 if (sv.frametime > 0.05)
 852                                 {
 853                                         PRVM_serverglobalfloat(frametime) = sv.frametime = moveframetime * 0.5f;
 854                                         SV_Physics_ClientMove();
 855                                 }
 856                                 SV_Physics_ClientMove();
 857                                 sv.frametime = oldframetime2;
 858                                 PRVM_serverglobalfloat(frametime) = oldframetime;
 859                                 host_client->clmovement_inputtimeout = min(0.1, sv_clmovement_inputtimeout.value);
 860                         }
 861                 }
 862         }
 863         else
 864         {
 865                 // try to gather button bits from old moves, but only if their time is
 866                 // advancing (ones with the same timestamp can't be trusted)
 867                 for (moveindex = 0;moveindex < sv_numreadmoves-1;moveindex++)
 868                 {
 869                         usercmd_t *move = sv_readmoves + moveindex;
 870                         if (host_client->cmd.time < move->time)
 871                         {
 872                                 sv_readmoves[sv_numreadmoves-1].buttons |= move->buttons;
 873                                 if (move->impulse)
 874                                         sv_readmoves[sv_numreadmoves-1].impulse = move->impulse;
 875                         }
 876                 }
 877                 // now copy the new move
 878                 host_client->cmd = sv_readmoves[sv_numreadmoves-1];
 879                 host_client->cmd.time = max(host_client->cmd.time, sv.time);
 880                         // physics will run up to sv.time, so allow no predicted moves
 881                         // before that otherwise, there is a speedhack by turning
 882                         // prediction on and off repeatedly on client side because the
 883                         // engine would run BOTH client and server physics for the same
 884                         // time
 885                 host_client->movesequence = 0;
 886                 // make sure that normal physics takes over immediately
 887                 host_client->clmovement_inputtimeout = 0;
 888                 // update ping time
 889                 host_client->ping = host_client->cmd.receivetime - sv_readmoves[sv_numreadmoves-1].time;
 890         }
 891 }
 892
 893 void SV_ApplyClientMove (void)
 894 {
 895         prvm_prog_t *prog = SVVM_prog;
 896         usercmd_t *move = &host_client->cmd;
 897         int j, movementloss, packetloss;
 898
 899         if (!move->receivetime)
 900                 return;
 901
 902         // note: a move can be applied multiple times if the client packets are
 903         // not coming as often as the physics is executed, and the move must be
 904         // applied before running qc each time because the id1 qc had a bug where
 905         // it clears self.button2 in PlayerJump, causing pogostick behavior if
 906         // moves are not applied every time before calling qc
 907         move->applied = true;
 908
 909         // set the edict fields
 910         PRVM_serveredictfloat(host_client->edict, button0) = move->buttons & 1;
 911         PRVM_serveredictfloat(host_client->edict, button2) = (move->buttons & 2)>>1;
 912         if (move->impulse)
 913                 PRVM_serveredictfloat(host_client->edict, impulse) = move->impulse;
 914         // only send the impulse to qc once
 915         move->impulse = 0;
 916
 917         movementloss = packetloss = 0;
 918         if(host_client->netconnection)
 919         {
 920                 for (j = 0;j < NETGRAPH_PACKETS;j++)
 921                         if (host_client->netconnection->incoming_netgraph[j].unreliablebytes == NETGRAPH_LOSTPACKET)
 922                                 packetloss++;
 923                 for (j = 0;j < NETGRAPH_PACKETS;j++)
 924                         if (host_client->movement_count[j] < 0)
 925                                 movementloss++;
 926         }
 927
 928         VectorCopy(move->viewangles, PRVM_serveredictvector(host_client->edict, v_angle));
 929         PRVM_serveredictfloat(host_client->edict, button3) = ((move->buttons >> 2) & 1);
 930         PRVM_serveredictfloat(host_client->edict, button4) = ((move->buttons >> 3) & 1);
 931         PRVM_serveredictfloat(host_client->edict, button5) = ((move->buttons >> 4) & 1);
 932         PRVM_serveredictfloat(host_client->edict, button6) = ((move->buttons >> 5) & 1);
 933         PRVM_serveredictfloat(host_client->edict, button7) = ((move->buttons >> 6) & 1);
 934         PRVM_serveredictfloat(host_client->edict, button8) = ((move->buttons >> 7) & 1);
 935         PRVM_serveredictfloat(host_client->edict, button9) = ((move->buttons >> 11) & 1);
 936         PRVM_serveredictfloat(host_client->edict, button10) = ((move->buttons >> 12) & 1);
 937         PRVM_serveredictfloat(host_client->edict, button11) = ((move->buttons >> 13) & 1);
 938         PRVM_serveredictfloat(host_client->edict, button12) = ((move->buttons >> 14) & 1);
 939         PRVM_serveredictfloat(host_client->edict, button13) = ((move->buttons >> 15) & 1);
 940         PRVM_serveredictfloat(host_client->edict, button14) = ((move->buttons >> 16) & 1);
 941         PRVM_serveredictfloat(host_client->edict, button15) = ((move->buttons >> 17) & 1);
 942         PRVM_serveredictfloat(host_client->edict, button16) = ((move->buttons >> 18) & 1);
 943         PRVM_serveredictfloat(host_client->edict, buttonuse) = ((move->buttons >> 8) & 1);
 944         PRVM_serveredictfloat(host_client->edict, buttonchat) = ((move->buttons >> 9) & 1);
 945         PRVM_serveredictfloat(host_client->edict, cursor_active) = ((move->buttons >> 10) & 1);
 946         VectorSet(PRVM_serveredictvector(host_client->edict, movement), move->forwardmove, move->sidemove, move->upmove);
 947         VectorCopy(move->cursor_screen, PRVM_serveredictvector(host_client->edict, cursor_screen));
 948         VectorCopy(move->cursor_start, PRVM_serveredictvector(host_client->edict, cursor_trace_start));
 949         VectorCopy(move->cursor_impact, PRVM_serveredictvector(host_client->edict, cursor_trace_endpos));
 950         PRVM_serveredictedict(host_client->edict, cursor_trace_ent) = PRVM_EDICT_TO_PROG(PRVM_EDICT_NUM(move->cursor_entitynumber));
 951         PRVM_serveredictfloat(host_client->edict, ping) = host_client->ping * 1000.0;
 952         PRVM_serveredictfloat(host_client->edict, ping_packetloss) = packetloss / (float) NETGRAPH_PACKETS;
 953         PRVM_serveredictfloat(host_client->edict, ping_movementloss) = movementloss / (float) NETGRAPH_PACKETS;
 954 }
 955
 956 static qbool SV_FrameLost(int framenum)
 957 {
 958         if (host_client->entitydatabase5)
 959         {
 960                 if (framenum <= host_client->entitydatabase5->latestframenum)
 961                 {
 962                         EntityFrame5_LostFrame(host_client->entitydatabase5, framenum);
 963                         EntityFrameCSQC_LostFrame(host_client, framenum);
 964                         return true;
 965                 }
 966         }
 967         return false;
 968 }
 969
 970 static void SV_FrameAck(int framenum)
 971 {
 972         if (host_client->entitydatabase)
 973                 EntityFrame_AckFrame(host_client->entitydatabase, framenum);
 974         else if (host_client->entitydatabase4)
 975                 EntityFrame4_AckFrame(host_client->entitydatabase4, framenum, true);
 976         else if (host_client->entitydatabase5)
 977                 EntityFrame5_AckFrame(host_client->entitydatabase5, framenum);
 978 }
 979
 980 /*
 981 ===================
 982 SV_ReadClientMessage
 983 ===================
 984 */
 985 void SV_ReadClientMessage(void)
 986 {
 987         prvm_prog_t *prog = SVVM_prog;
 988         int netcmd, num, start;
 989         char *s, *p, *q;
 990
 991         if(sv_autodemo_perclient.integer >= 2)
 992                 SV_WriteDemoMessage(host_client, &(host_client->netconnection->message), true);
 993
 994         //MSG_BeginReading ();
 995         sv_numreadmoves = 0;
 996
 997         for(;;)
 998         {
 999                 if (!host_client->active)
1000                 {
1001                         // a command caused an error
1002                         SV_DropClient (false);
1003                         return;
1004                 }
1005
1006                 if (sv_message.badread)
1007                 {
1008                         Con_Print("SV_ReadClientMessage: badread\n");
1009                         SV_DropClient (false);
1010                         return;
1011                 }
1012
1013                 netcmd = MSG_ReadByte(&sv_message);
1014                 if (netcmd == -1)
1015                 {
1016                         // end of message
1017                         // apply the moves that were read this frame
1018                         SV_ExecuteClientMoves();
1019                         break;
1020                 }
1021
1022                 switch (netcmd)
1023                 {
1024                 default:
1025                         Con_Printf("SV_ReadClientMessage: unknown command char %i (at offset 0x%x)\n", netcmd, sv_message.readcount);
1026                         if (developer_networking.integer)
1027                                 Com_HexDumpToConsole(sv_message.data, sv_message.cursize);
1028                         SV_DropClient (false);
1029                         return;
1030
1031                 case clc_nop:
1032                         break;
1033
1034                 case clc_stringcmd:
1035                         // allow reliable messages now as the client is done with initial loading
1036                         if (host_client->sendsignon == 2)
1037                                 host_client->sendsignon = 0;
1038                         s = MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring));
1039                         q = NULL;
1040                         for(p = s; *p; ++p) switch(*p)
1041                         {
1042                                 case 10:
1043                                 case 13:
1044                                         if(!q)
1045                                                 q = p;
1046                                         break;
1047                                 default:
1048                                         if(q)
1049                                                 goto clc_stringcmd_invalid; // newline seen, THEN something else -> possible exploit
1050                                         break;
1051                         }
1052                         if(q)
1053                                 *q = 0;
1054                         if (strncasecmp(s, "spawn", 5) == 0
1055                          || strncasecmp(s, "begin", 5) == 0
1056                          || strncasecmp(s, "prespawn", 8) == 0)
1057                                 Cmd_ExecuteString (cmd_serverfromclient, s, src_client, true);
1058                         else if (PRVM_serverfunction(SV_ParseClientCommand))
1059                         {
1060                                 int restorevm_tempstringsbuf_cursize;
1061                                 restorevm_tempstringsbuf_cursize = prog->tempstringsbuf.cursize;
1062                                 PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(prog, s);
1063                                 PRVM_serverglobalfloat(time) = sv.time;
1064                                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
1065                                 prog->ExecuteProgram(prog, PRVM_serverfunction(SV_ParseClientCommand), "QC function SV_ParseClientCommand is missing");
1066                                 prog->tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
1067                         }
1068                         else
1069                                 Cmd_ExecuteString (cmd_serverfromclient, s, src_client, true);
1070                         break;
1071
1072 clc_stringcmd_invalid:
1073                         Con_Printf("Received invalid stringcmd from %s\n", host_client->name);
1074                         if(developer.integer > 0)
1075                                 Com_HexDumpToConsole((unsigned char *) s, (int)strlen(s));
1076                         break;
1077
1078                 case clc_disconnect:
1079                         SV_DropClient (false); // client wants to disconnect
1080                         return;
1081
1082                 case clc_move:
1083                         SV_ReadClientMove();
1084                         break;
1085
1086                 case clc_ackdownloaddata:
1087                         start = MSG_ReadLong(&sv_message);
1088                         num = MSG_ReadShort(&sv_message);
1089                         if (host_client->download_file && host_client->download_started)
1090                         {
1091                                 if (host_client->download_expectedposition == start)
1092                                 {
1093                                         int size = (int)FS_FileSize(host_client->download_file);
1094                                         // a data block was successfully received by the client,
1095                                         // update the expected position on the next data block
1096                                         host_client->download_expectedposition = start + num;
1097                                         // if this was the last data block of the file, it's done
1098                                         if (host_client->download_expectedposition >= FS_FileSize(host_client->download_file))
1099                                         {
1100                                                 // tell the client that the download finished
1101                                                 // we need to calculate the crc now
1102                                                 //
1103                                                 // note: at this point the OS probably has the file
1104                                                 // entirely in memory, so this is a faster operation
1105                                                 // now than it was when the download started.
1106                                                 //
1107                                                 // it is also preferable to do this at the end of the
1108                                                 // download rather than the start because it reduces
1109                                                 // potential for Denial Of Service attacks against the
1110                                                 // server.
1111                                                 int crc;
1112                                                 unsigned char *temp;
1113                                                 FS_Seek(host_client->download_file, 0, SEEK_SET);
1114                                                 temp = (unsigned char *) Mem_Alloc(tempmempool, size);
1115                                                 FS_Read(host_client->download_file, temp, size);
1116                                                 crc = CRC_Block(temp, size);
1117                                                 Mem_Free(temp);
1118                                                 // calculated crc, send the file info to the client
1119                                                 // (so that it can verify the data)
1120                                                 SV_ClientCommands("\ncl_downloadfinished %i %i %s\n", size, crc, host_client->download_name);
1121                                                 Con_DPrintf("Download of %s by %s has finished\n", host_client->download_name, host_client->name);
1122                                                 FS_Close(host_client->download_file);
1123                                                 host_client->download_file = NULL;
1124                                                 host_client->download_name[0] = 0;
1125                                                 host_client->download_expectedposition = 0;
1126                                                 host_client->download_started = false;
1127                                         }
1128                                 }
1129                                 else
1130                                 {
1131                                         // a data block was lost, reset to the expected position
1132                                         // and resume sending from there
1133                                         FS_Seek(host_client->download_file, host_client->download_expectedposition, SEEK_SET);
1134                                 }
1135                         }
1136                         break;
1137
1138                 case clc_ackframe:
1139                         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
1140                         num = MSG_ReadLong(&sv_message);
1141                         if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
1142                         if (developer_networkentities.integer >= 10)
1143                                 Con_Printf("recv clc_ackframe %i\n", num);
1144                         // if the client hasn't progressed through signons yet,
1145                         // ignore any clc_ackframes we get (they're probably from the
1146                         // previous level)
1147                         if (host_client->begun && host_client->latestframenum < num)
1148                         {
1149                                 int i;
1150                                 for (i = host_client->latestframenum + 1;i < num;i++)
1151                                         if (!SV_FrameLost(i))
1152                                                 break;
1153                                 SV_FrameAck(num);
1154                                 host_client->latestframenum = num;
1155                         }
1156                         break;
1157                 }
1158         }
1159 }
1160