sv_user.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // sv_user.c -- server code for moving users
  21
  22 #include "quakedef.h"
  23 #include "sv_demo.h"
  24 #define DEBUGMOVES 0
  25
  26 static usercmd_t cmd;
  27 extern cvar_t sv_autodemo_perclient;
  28
  29 /*
  30 ===============
  31 SV_SetIdealPitch
  32 ===============
  33 */
  34 #define MAX_FORWARD     6
  35 void SV_SetIdealPitch (void)
  36 {
  37         float   angleval, sinval, cosval, step, dir;
  38         trace_t tr;
  39         vec3_t  top, bottom;
  40         float   z[MAX_FORWARD];
  41         int             i, j;
  42         int             steps;
  43
  44         if (!((int)host_client->edict->fields.server->flags & FL_ONGROUND))
  45                 return;
  46
  47         angleval = host_client->edict->fields.server->angles[YAW] * M_PI*2 / 360;
  48         sinval = sin(angleval);
  49         cosval = cos(angleval);
  50
  51         for (i=0 ; i<MAX_FORWARD ; i++)
  52         {
  53                 top[0] = host_client->edict->fields.server->origin[0] + cosval*(i+3)*12;
  54                 top[1] = host_client->edict->fields.server->origin[1] + sinval*(i+3)*12;
  55                 top[2] = host_client->edict->fields.server->origin[2] + host_client->edict->fields.server->view_ofs[2];
  56
  57                 bottom[0] = top[0];
  58                 bottom[1] = top[1];
  59                 bottom[2] = top[2] - 160;
  60
  61                 tr = SV_Move (top, vec3_origin, vec3_origin, bottom, MOVE_NOMONSTERS, host_client->edict, SUPERCONTENTS_SOLID);
  62                 // if looking at a wall, leave ideal the way is was
  63                 if (tr.startsolid)
  64                         return;
  65
  66                 // near a dropoff
  67                 if (tr.fraction == 1)
  68                         return;
  69
  70                 z[i] = top[2] + tr.fraction*(bottom[2]-top[2]);
  71         }
  72
  73         dir = 0;
  74         steps = 0;
  75         for (j=1 ; j<i ; j++)
  76         {
  77                 step = z[j] - z[j-1];
  78                 if (step > -ON_EPSILON && step < ON_EPSILON)
  79                         continue;
  80
  81                 // mixed changes
  82                 if (dir && ( step-dir > ON_EPSILON || step-dir < -ON_EPSILON ) )
  83                         return;
  84
  85                 steps++;
  86                 dir = step;
  87         }
  88
  89         if (!dir)
  90         {
  91                 host_client->edict->fields.server->idealpitch = 0;
  92                 return;
  93         }
  94
  95         if (steps < 2)
  96                 return;
  97         host_client->edict->fields.server->idealpitch = -dir * sv_idealpitchscale.value;
  98 }
  99
 100 static vec3_t wishdir, forward, right, up;
 101 static float wishspeed;
 102
 103 static qboolean onground;
 104
 105 /*
 106 ==================
 107 SV_UserFriction
 108
 109 ==================
 110 */
 111 void SV_UserFriction (void)
 112 {
 113         float speed, newspeed, control, friction;
 114         vec3_t start, stop;
 115         trace_t trace;
 116
 117         speed = sqrt(host_client->edict->fields.server->velocity[0]*host_client->edict->fields.server->velocity[0]+host_client->edict->fields.server->velocity[1]*host_client->edict->fields.server->velocity[1]);
 118         if (!speed)
 119                 return;
 120
 121         // if the leading edge is over a dropoff, increase friction
 122         start[0] = stop[0] = host_client->edict->fields.server->origin[0] + host_client->edict->fields.server->velocity[0]/speed*16;
 123         start[1] = stop[1] = host_client->edict->fields.server->origin[1] + host_client->edict->fields.server->velocity[1]/speed*16;
 124         start[2] = host_client->edict->fields.server->origin[2] + host_client->edict->fields.server->mins[2];
 125         stop[2] = start[2] - 34;
 126
 127         trace = SV_Move (start, vec3_origin, vec3_origin, stop, MOVE_NOMONSTERS, host_client->edict, SV_GenericHitSuperContentsMask(host_client->edict));
 128
 129         if (trace.fraction == 1.0)
 130                 friction = sv_friction.value*sv_edgefriction.value;
 131         else
 132                 friction = sv_friction.value;
 133
 134         // apply friction
 135         control = speed < sv_stopspeed.value ? sv_stopspeed.value : speed;
 136         newspeed = speed - sv.frametime*control*friction;
 137
 138         if (newspeed < 0)
 139                 newspeed = 0;
 140         else
 141                 newspeed /= speed;
 142
 143         VectorScale(host_client->edict->fields.server->velocity, newspeed, host_client->edict->fields.server->velocity);
 144 }
 145
 146 /*
 147 ==============
 148 SV_Accelerate
 149 ==============
 150 */
 151 void SV_Accelerate (void)
 152 {
 153         int i;
 154         float addspeed, accelspeed, currentspeed;
 155
 156         currentspeed = DotProduct (host_client->edict->fields.server->velocity, wishdir);
 157         addspeed = wishspeed - currentspeed;
 158         if (addspeed <= 0)
 159                 return;
 160         accelspeed = sv_accelerate.value*sv.frametime*wishspeed;
 161         if (accelspeed > addspeed)
 162                 accelspeed = addspeed;
 163
 164         for (i=0 ; i<3 ; i++)
 165                 host_client->edict->fields.server->velocity[i] += accelspeed*wishdir[i];
 166 }
 167
 168 void SV_AirAccelerate (vec3_t wishveloc)
 169 {
 170         int i;
 171         float addspeed, wishspd, accelspeed, currentspeed;
 172
 173         wishspd = VectorNormalizeLength (wishveloc);
 174         if (wishspd > sv_maxairspeed.value)
 175                 wishspd = sv_maxairspeed.value;
 176         currentspeed = DotProduct (host_client->edict->fields.server->velocity, wishveloc);
 177         addspeed = wishspd - currentspeed;
 178         if (addspeed <= 0)
 179                 return;
 180         accelspeed = (sv_airaccelerate.value < 0 ? sv_accelerate.value : sv_airaccelerate.value)*wishspeed * sv.frametime;
 181         if (accelspeed > addspeed)
 182                 accelspeed = addspeed;
 183
 184         for (i=0 ; i<3 ; i++)
 185                 host_client->edict->fields.server->velocity[i] += accelspeed*wishveloc[i];
 186 }
 187
 188
 189 void DropPunchAngle (void)
 190 {
 191         float len;
 192         prvm_eval_t *val;
 193
 194         len = VectorNormalizeLength (host_client->edict->fields.server->punchangle);
 195
 196         len -= 10*sv.frametime;
 197         if (len < 0)
 198                 len = 0;
 199         VectorScale (host_client->edict->fields.server->punchangle, len, host_client->edict->fields.server->punchangle);
 200
 201         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.punchvector)))
 202         {
 203                 len = VectorNormalizeLength (val->vector);
 204
 205                 len -= 20*sv.frametime;
 206                 if (len < 0)
 207                         len = 0;
 208                 VectorScale (val->vector, len, val->vector);
 209         }
 210 }
 211
 212 /*
 213 ===================
 214 SV_FreeMove
 215 ===================
 216 */
 217 void SV_FreeMove (void)
 218 {
 219         int i;
 220         float wishspeed;
 221
 222         AngleVectors (host_client->edict->fields.server->v_angle, forward, right, up);
 223
 224         for (i = 0; i < 3; i++)
 225                 host_client->edict->fields.server->velocity[i] = forward[i] * cmd.forwardmove + right[i] * cmd.sidemove;
 226
 227         host_client->edict->fields.server->velocity[2] += cmd.upmove;
 228
 229         wishspeed = VectorLength(host_client->edict->fields.server->velocity);
 230         if (wishspeed > sv_maxspeed.value)
 231                 VectorScale(host_client->edict->fields.server->velocity, sv_maxspeed.value / wishspeed, host_client->edict->fields.server->velocity);
 232 }
 233
 234 /*
 235 ===================
 236 SV_WaterMove
 237
 238 ===================
 239 */
 240 void SV_WaterMove (void)
 241 {
 242         int i;
 243         vec3_t wishvel;
 244         float speed, newspeed, wishspeed, addspeed, accelspeed, temp;
 245
 246         // user intentions
 247         AngleVectors (host_client->edict->fields.server->v_angle, forward, right, up);
 248
 249         for (i=0 ; i<3 ; i++)
 250                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 251
 252         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 253                 wishvel[2] -= 60;               // drift towards bottom
 254         else
 255                 wishvel[2] += cmd.upmove;
 256
 257         wishspeed = VectorLength(wishvel);
 258         if (wishspeed > sv_maxspeed.value)
 259         {
 260                 temp = sv_maxspeed.value/wishspeed;
 261                 VectorScale (wishvel, temp, wishvel);
 262                 wishspeed = sv_maxspeed.value;
 263         }
 264         wishspeed *= 0.7;
 265
 266         // water friction
 267         speed = VectorLength(host_client->edict->fields.server->velocity);
 268         if (speed)
 269         {
 270                 newspeed = speed - sv.frametime * speed * (sv_waterfriction.value < 0 ? sv_friction.value : sv_waterfriction.value);
 271                 if (newspeed < 0)
 272                         newspeed = 0;
 273                 temp = newspeed/speed;
 274                 VectorScale(host_client->edict->fields.server->velocity, temp, host_client->edict->fields.server->velocity);
 275         }
 276         else
 277                 newspeed = 0;
 278
 279         // water acceleration
 280         if (!wishspeed)
 281                 return;
 282
 283         addspeed = wishspeed - newspeed;
 284         if (addspeed <= 0)
 285                 return;
 286
 287         VectorNormalize (wishvel);
 288         accelspeed = (sv_wateraccelerate.value < 0 ? sv_accelerate.value : sv_wateraccelerate.value) * wishspeed * sv.frametime;
 289         if (accelspeed > addspeed)
 290                 accelspeed = addspeed;
 291
 292         for (i=0 ; i<3 ; i++)
 293                 host_client->edict->fields.server->velocity[i] += accelspeed * wishvel[i];
 294 }
 295
 296 void SV_WaterJump (void)
 297 {
 298         if (sv.time > host_client->edict->fields.server->teleport_time || !host_client->edict->fields.server->waterlevel)
 299         {
 300                 host_client->edict->fields.server->flags = (int)host_client->edict->fields.server->flags & ~FL_WATERJUMP;
 301                 host_client->edict->fields.server->teleport_time = 0;
 302         }
 303         host_client->edict->fields.server->velocity[0] = host_client->edict->fields.server->movedir[0];
 304         host_client->edict->fields.server->velocity[1] = host_client->edict->fields.server->movedir[1];
 305 }
 306
 307
 308 /*
 309 ===================
 310 SV_AirMove
 311
 312 ===================
 313 */
 314 void SV_AirMove (void)
 315 {
 316         int i;
 317         vec3_t wishvel;
 318         float fmove, smove, temp;
 319
 320         // LordHavoc: correct quake movement speed bug when looking up/down
 321         wishvel[0] = wishvel[2] = 0;
 322         wishvel[1] = host_client->edict->fields.server->angles[1];
 323         AngleVectors (wishvel, forward, right, up);
 324
 325         fmove = cmd.forwardmove;
 326         smove = cmd.sidemove;
 327
 328 // hack to not let you back into teleporter
 329         if (sv.time < host_client->edict->fields.server->teleport_time && fmove < 0)
 330                 fmove = 0;
 331
 332         for (i=0 ; i<3 ; i++)
 333                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 334
 335         if ((int)host_client->edict->fields.server->movetype != MOVETYPE_WALK)
 336                 wishvel[2] += cmd.upmove;
 337
 338         VectorCopy (wishvel, wishdir);
 339         wishspeed = VectorNormalizeLength(wishdir);
 340         if (wishspeed > sv_maxspeed.value)
 341         {
 342                 temp = sv_maxspeed.value/wishspeed;
 343                 VectorScale (wishvel, temp, wishvel);
 344                 wishspeed = sv_maxspeed.value;
 345         }
 346
 347         if (host_client->edict->fields.server->movetype == MOVETYPE_NOCLIP)
 348         {
 349                 // noclip
 350                 VectorCopy (wishvel, host_client->edict->fields.server->velocity);
 351         }
 352         else if (onground)
 353         {
 354                 SV_UserFriction ();
 355                 SV_Accelerate ();
 356         }
 357         else
 358         {
 359                 // not on ground, so little effect on velocity
 360                 SV_AirAccelerate (wishvel);
 361         }
 362 }
 363
 364 /*
 365 ===================
 366 SV_ClientThink
 367
 368 the move fields specify an intended velocity in pix/sec
 369 the angle fields specify an exact angular motion in degrees
 370 ===================
 371 */
 372 void SV_ClientThink (void)
 373 {
 374         vec3_t v_angle;
 375
 376         //Con_Printf("clientthink for %ims\n", (int) (sv.frametime * 1000));
 377
 378         SV_ApplyClientMove();
 379         // make sure the velocity is sane (not a NaN)
 380         SV_CheckVelocity(host_client->edict);
 381
 382         // LordHavoc: QuakeC replacement for SV_ClientThink (player movement)
 383         if (prog->funcoffsets.SV_PlayerPhysics && sv_playerphysicsqc.integer)
 384         {
 385                 prog->globals.server->time = sv.time;
 386                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
 387                 PRVM_ExecuteProgram (prog->funcoffsets.SV_PlayerPhysics, "QC function SV_PlayerPhysics is missing");
 388                 SV_CheckVelocity(host_client->edict);
 389                 return;
 390         }
 391
 392         if (host_client->edict->fields.server->movetype == MOVETYPE_NONE)
 393                 return;
 394
 395         onground = (int)host_client->edict->fields.server->flags & FL_ONGROUND;
 396
 397         DropPunchAngle ();
 398
 399         // if dead, behave differently
 400         if (host_client->edict->fields.server->health <= 0)
 401                 return;
 402
 403         cmd = host_client->cmd;
 404
 405         // angles
 406         // show 1/3 the pitch angle and all the roll angle
 407         VectorAdd (host_client->edict->fields.server->v_angle, host_client->edict->fields.server->punchangle, v_angle);
 408         host_client->edict->fields.server->angles[ROLL] = V_CalcRoll (host_client->edict->fields.server->angles, host_client->edict->fields.server->velocity)*4;
 409         if (!host_client->edict->fields.server->fixangle)
 410         {
 411                 host_client->edict->fields.server->angles[PITCH] = -v_angle[PITCH]/3;
 412                 host_client->edict->fields.server->angles[YAW] = v_angle[YAW];
 413         }
 414
 415         if ( (int)host_client->edict->fields.server->flags & FL_WATERJUMP )
 416         {
 417                 SV_WaterJump ();
 418                 SV_CheckVelocity(host_client->edict);
 419                 return;
 420         }
 421
 422         /*
 423         // Player is (somehow) outside of the map, or flying, or noclipping
 424         if (host_client->edict->fields.server->movetype != MOVETYPE_NOCLIP && (host_client->edict->fields.server->movetype == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict)))
 425         //if (host_client->edict->fields.server->movetype == MOVETYPE_NOCLIP || host_client->edict->fields.server->movetype == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict))
 426         {
 427                 SV_FreeMove ();
 428                 return;
 429         }
 430         */
 431
 432         // walk
 433         if ((host_client->edict->fields.server->waterlevel >= 2) && (host_client->edict->fields.server->movetype != MOVETYPE_NOCLIP))
 434         {
 435                 SV_WaterMove ();
 436                 SV_CheckVelocity(host_client->edict);
 437                 return;
 438         }
 439
 440         SV_AirMove ();
 441         SV_CheckVelocity(host_client->edict);
 442 }
 443
 444 /*
 445 ===================
 446 SV_ReadClientMove
 447 ===================
 448 */
 449 int sv_numreadmoves = 0;
 450 usercmd_t sv_readmoves[CL_MAX_USERCMDS];
 451 void SV_ReadClientMove (void)
 452 {
 453         int i;
 454         usercmd_t newmove;
 455         usercmd_t *move = &newmove;
 456
 457         memset(move, 0, sizeof(*move));
 458
 459         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 460
 461         // read ping time
 462         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)
 463                 move->sequence = MSG_ReadLong ();
 464         move->time = move->clienttime = MSG_ReadFloat ();
 465         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 466         move->receivetime = (float)sv.time;
 467
 468 #if DEBUGMOVES
 469         Con_Printf("%s move%i #%i %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);
 470 #endif
 471         // limit reported time to current time
 472         // (incase the client is trying to cheat)
 473         move->time = min(move->time, move->receivetime + sv.frametime);
 474
 475         // read current angles
 476         for (i = 0;i < 3;i++)
 477         {
 478                 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)
 479                         move->viewangles[i] = MSG_ReadAngle8i();
 480                 else if (sv.protocol == PROTOCOL_DARKPLACES1)
 481                         move->viewangles[i] = MSG_ReadAngle16i();
 482                 else if (sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3)
 483                         move->viewangles[i] = MSG_ReadAngle32f();
 484                 else
 485                         move->viewangles[i] = MSG_ReadAngle16i();
 486         }
 487         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 488
 489         // read movement
 490         move->forwardmove = MSG_ReadCoord16i ();
 491         move->sidemove = MSG_ReadCoord16i ();
 492         move->upmove = MSG_ReadCoord16i ();
 493         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 494
 495         // read buttons
 496         // be sure to bitwise OR them into the move->buttons because we want to
 497         // accumulate button presses from multiple packets per actual move
 498         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)
 499                 move->buttons = MSG_ReadByte ();
 500         else
 501                 move->buttons = MSG_ReadLong ();
 502         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 503
 504         // read impulse
 505         move->impulse = MSG_ReadByte ();
 506         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 507
 508         // PRYDON_CLIENTCURSOR
 509         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)
 510         {
 511                 // 30 bytes
 512                 move->cursor_screen[0] = MSG_ReadShort() * (1.0f / 32767.0f);
 513                 move->cursor_screen[1] = MSG_ReadShort() * (1.0f / 32767.0f);
 514                 move->cursor_start[0] = MSG_ReadFloat();
 515                 move->cursor_start[1] = MSG_ReadFloat();
 516                 move->cursor_start[2] = MSG_ReadFloat();
 517                 move->cursor_impact[0] = MSG_ReadFloat();
 518                 move->cursor_impact[1] = MSG_ReadFloat();
 519                 move->cursor_impact[2] = MSG_ReadFloat();
 520                 move->cursor_entitynumber = (unsigned short)MSG_ReadShort();
 521                 if (move->cursor_entitynumber >= prog->max_edicts)
 522                 {
 523                         Con_DPrintf("SV_ReadClientMessage: client send bad cursor_entitynumber\n");
 524                         move->cursor_entitynumber = 0;
 525                 }
 526                 // as requested by FrikaC, cursor_trace_ent is reset to world if the
 527                 // entity is free at time of receipt
 528                 if (PRVM_EDICT_NUM(move->cursor_entitynumber)->priv.server->free)
 529                         move->cursor_entitynumber = 0;
 530                 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 531         }
 532
 533         // if the previous move has not been applied yet, we need to accumulate
 534         // the impulse/buttons from it
 535         if (!host_client->cmd.applied)
 536         {
 537                 if (!move->impulse)
 538                         move->impulse = host_client->cmd.impulse;
 539                 move->buttons |= host_client->cmd.buttons;
 540         }
 541
 542         // now store this move for later execution
 543         // (we have to buffer the moves because of old ones being repeated)
 544         if (sv_numreadmoves < CL_MAX_USERCMDS)
 545                 sv_readmoves[sv_numreadmoves++] = *move;
 546 }
 547
 548 void SV_ExecuteClientMoves(void)
 549 {
 550         int moveindex;
 551         float moveframetime;
 552         double oldframetime;
 553         double oldframetime2;
 554 #ifdef NUM_PING_TIMES
 555         double total;
 556 #endif
 557         prvm_eval_t *val;
 558         if (sv_numreadmoves < 1)
 559                 return;
 560         // only start accepting input once the player is spawned
 561         if (!host_client->spawned)
 562                 return;
 563 #if DEBUGMOVES
 564         Con_Printf("SV_ExecuteClientMoves: read %i moves at sv.time %f\n", sv_numreadmoves, (float)sv.time);
 565 #endif
 566         // disable clientside movement prediction in some cases
 567         if (ceil(max(sv_readmoves[sv_numreadmoves-1].receivetime - sv_readmoves[sv_numreadmoves-1].time, 0) * 1000.0) < sv_clmovement_minping.integer)
 568                 host_client->clmovement_disabletimeout = realtime + sv_clmovement_minping_disabletime.value / 1000.0;
 569         // several conditions govern whether clientside movement prediction is allowed
 570         if (sv_readmoves[sv_numreadmoves-1].sequence && sv_clmovement_enable.integer && sv_clmovement_waitforinput.integer > 0 && host_client->clmovement_disabletimeout <= realtime && host_client->edict->fields.server->movetype == MOVETYPE_WALK && (!(val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.disableclientprediction)) || !val->_float))
 571         {
 572                 // process the moves in order and ignore old ones
 573                 // but always trust the latest move
 574                 // (this deals with bogus initial move sequences after level change,
 575                 //  where the client will eventually catch up with the level change
 576                 //  and reset its move sequence)
 577                 for (moveindex = 0;moveindex < sv_numreadmoves;moveindex++)
 578                 {
 579                         usercmd_t *move = sv_readmoves + moveindex;
 580                         if (host_client->movesequence < move->sequence || moveindex == sv_numreadmoves - 1)
 581                         {
 582 #if DEBUGMOVES
 583                                 Con_Printf("%smove #%i %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);
 584 #endif
 585                                 // this is a new move
 586                                 move->time = bound(sv.time - 1, move->time, sv.time); // prevent slowhack/speedhack combos
 587                                 move->time = max(move->time, host_client->cmd.time); // prevent backstepping of time
 588                                 moveframetime = bound(0, move->time - host_client->cmd.time, min(0.1, sv.frametime * sv_clmovement_waitforinput.integer));
 589                                 //Con_Printf("movesequence = %i (%i lost), moveframetime = %f\n", move->sequence, move->sequence ? move->sequence - host_client->movesequence - 1 : 0, moveframetime);
 590                                 host_client->cmd = *move;
 591                                 host_client->movesequence = move->sequence;
 592
 593                                 // if using prediction, we need to perform moves when packets are
 594                                 // received, even if multiple occur in one frame
 595                                 // (they can't go beyond the current time so there is no cheat issue
 596                                 //  with this approach, and if they don't send input for a while they
 597                                 //  start moving anyway, so the longest 'lagaport' possible is
 598                                 //  determined by the sv_clmovement_waitforinput cvar)
 599                                 if (moveframetime <= 0)
 600                                         continue;
 601                                 oldframetime = prog->globals.server->frametime;
 602                                 oldframetime2 = sv.frametime;
 603                                 // update ping time for qc to see while executing this move
 604                                 host_client->ping = host_client->cmd.receivetime - host_client->cmd.time;
 605                                 // the server and qc frametime values must be changed temporarily
 606                                 prog->globals.server->frametime = sv.frametime = moveframetime;
 607                                 // if move is more than 50ms, split it into two moves (this matches QWSV behavior and the client prediction)
 608                                 if (sv.frametime > 0.05)
 609                                 {
 610                                         prog->globals.server->frametime = sv.frametime = moveframetime * 0.5f;
 611                                         SV_Physics_ClientMove();
 612                                 }
 613                                 SV_Physics_ClientMove();
 614                                 sv.frametime = oldframetime2;
 615                                 prog->globals.server->frametime = oldframetime;
 616                                 host_client->clmovement_skipphysicsframes = sv_clmovement_waitforinput.integer;
 617                         }
 618                 }
 619         }
 620         else
 621         {
 622                 // try to gather button bits from old moves, but only if their time is
 623                 // advancing (ones with the same timestamp can't be trusted)
 624                 for (moveindex = 0;moveindex < sv_numreadmoves-1;moveindex++)
 625                 {
 626                         usercmd_t *move = sv_readmoves + moveindex;
 627                         if (host_client->cmd.time < move->time)
 628                         {
 629                                 sv_readmoves[sv_numreadmoves-1].buttons |= move->buttons;
 630                                 if (move->impulse)
 631                                         sv_readmoves[sv_numreadmoves-1].impulse = move->impulse;
 632                         }
 633                 }
 634                 // now copy the new move
 635                 host_client->cmd = sv_readmoves[sv_numreadmoves-1];
 636                 host_client->cmd.time = max(host_client->cmd.time, sv.time);
 637                         // physics will run up to sv.time, so allow no predicted moves
 638                         // before that otherwise, there is a speedhack by turning
 639                         // prediction on and off repeatedly on client side because the
 640                         // engine would run BOTH client and server physics for the same
 641                         // time
 642                 host_client->movesequence = 0;
 643                 // make sure that normal physics takes over immediately
 644                 host_client->clmovement_skipphysicsframes = 0;
 645         }
 646
 647         // calculate average ping time
 648         host_client->ping = host_client->cmd.receivetime - host_client->cmd.clienttime;
 649 #ifdef NUM_PING_TIMES
 650         host_client->ping_times[host_client->num_pings % NUM_PING_TIMES] = host_client->cmd.receivetime - host_client->cmd.clienttime;
 651         host_client->num_pings++;
 652         for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 653                 total += host_client->ping_times[i];
 654         host_client->ping = total / NUM_PING_TIMES;
 655 #endif
 656 }
 657
 658 void SV_ApplyClientMove (void)
 659 {
 660         prvm_eval_t *val;
 661         usercmd_t *move = &host_client->cmd;
 662
 663         if (!move->receivetime)
 664                 return;
 665
 666         // note: a move can be applied multiple times if the client packets are
 667         // not coming as often as the physics is executed, and the move must be
 668         // applied before running qc each time because the id1 qc had a bug where
 669         // it clears self.button2 in PlayerJump, causing pogostick behavior if
 670         // moves are not applied every time before calling qc
 671         move->applied = true;
 672
 673         // set the edict fields
 674         host_client->edict->fields.server->button0 = move->buttons & 1;
 675         host_client->edict->fields.server->button2 = (move->buttons & 2)>>1;
 676         if (move->impulse)
 677                 host_client->edict->fields.server->impulse = move->impulse;
 678         // only send the impulse to qc once
 679         move->impulse = 0;
 680         VectorCopy(move->viewangles, host_client->edict->fields.server->v_angle);
 681         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button3))) val->_float = ((move->buttons >> 2) & 1);
 682         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button4))) val->_float = ((move->buttons >> 3) & 1);
 683         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button5))) val->_float = ((move->buttons >> 4) & 1);
 684         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button6))) val->_float = ((move->buttons >> 5) & 1);
 685         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button7))) val->_float = ((move->buttons >> 6) & 1);
 686         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button8))) val->_float = ((move->buttons >> 7) & 1);
 687         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button9))) val->_float = ((move->buttons >> 11) & 1);
 688         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button10))) val->_float = ((move->buttons >> 12) & 1);
 689         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button11))) val->_float = ((move->buttons >> 13) & 1);
 690         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button12))) val->_float = ((move->buttons >> 14) & 1);
 691         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button13))) val->_float = ((move->buttons >> 15) & 1);
 692         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button14))) val->_float = ((move->buttons >> 16) & 1);
 693         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button15))) val->_float = ((move->buttons >> 17) & 1);
 694         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button16))) val->_float = ((move->buttons >> 18) & 1);
 695         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.buttonuse))) val->_float = ((move->buttons >> 8) & 1);
 696         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.buttonchat))) val->_float = ((move->buttons >> 9) & 1);
 697         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_active))) val->_float = ((move->buttons >> 10) & 1);
 698         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.movement))) VectorSet(val->vector, move->forwardmove, move->sidemove, move->upmove);
 699         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_screen))) VectorCopy(move->cursor_screen, val->vector);
 700         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_start))) VectorCopy(move->cursor_start, val->vector);
 701         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_endpos))) VectorCopy(move->cursor_impact, val->vector);
 702         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_ent))) val->edict = PRVM_EDICT_TO_PROG(PRVM_EDICT_NUM(move->cursor_entitynumber));
 703         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.ping))) val->_float = host_client->ping * 1000.0;
 704 }
 705
 706 void SV_FrameLost(int framenum)
 707 {
 708         if (host_client->entitydatabase5)
 709         {
 710                 EntityFrame5_LostFrame(host_client->entitydatabase5, framenum);
 711                 EntityFrameCSQC_LostFrame(host_client, framenum);
 712         }
 713 }
 714
 715 void SV_FrameAck(int framenum)
 716 {
 717         if (host_client->entitydatabase)
 718                 EntityFrame_AckFrame(host_client->entitydatabase, framenum);
 719         else if (host_client->entitydatabase4)
 720                 EntityFrame4_AckFrame(host_client->entitydatabase4, framenum, true);
 721         else if (host_client->entitydatabase5)
 722                 EntityFrame5_AckFrame(host_client->entitydatabase5, framenum);
 723 }
 724
 725 /*
 726 ===================
 727 SV_ReadClientMessage
 728 ===================
 729 */
 730 extern void SV_SendServerinfo(client_t *client);
 731 extern sizebuf_t vm_tempstringsbuf;
 732 void SV_ReadClientMessage(void)
 733 {
 734         int cmd, num, start;
 735         char *s, *p, *q;
 736
 737         if(sv_autodemo_perclient.integer >= 2)
 738                 SV_WriteDemoMessage(host_client, &(host_client->netconnection->message), true);
 739
 740         //MSG_BeginReading ();
 741         sv_numreadmoves = 0;
 742
 743         for(;;)
 744         {
 745                 if (!host_client->active)
 746                 {
 747                         // a command caused an error
 748                         SV_DropClient (false);
 749                         return;
 750                 }
 751
 752                 if (msg_badread)
 753                 {
 754                         Con_Print("SV_ReadClientMessage: badread\n");
 755                         SV_DropClient (false);
 756                         return;
 757                 }
 758
 759                 cmd = MSG_ReadByte ();
 760                 if (cmd == -1)
 761                 {
 762                         // end of message
 763                         // apply the moves that were read this frame
 764                         SV_ExecuteClientMoves();
 765                         break;
 766                 }
 767
 768                 switch (cmd)
 769                 {
 770                 default:
 771                         Con_Printf("SV_ReadClientMessage: unknown command char %i\n", cmd);
 772                         SV_DropClient (false);
 773                         return;
 774
 775                 case clc_nop:
 776                         break;
 777
 778                 case clc_stringcmd:
 779                         // allow reliable messages now as the client is done with initial loading
 780                         if (host_client->sendsignon == 2)
 781                                 host_client->sendsignon = 0;
 782                         s = MSG_ReadString ();
 783                         q = NULL;
 784                         for(p = s; *p; ++p) switch(*p)
 785                         {
 786                                 case 10:
 787                                 case 13:
 788                                         if(!q)
 789                                                 q = p;
 790                                         break;
 791                                 default:
 792                                         if(q)
 793                                                 goto clc_stringcmd_invalid; // newline seen, THEN something else -> possible exploit
 794                                         break;
 795                         }
 796                         if(q)
 797                                 *q = 0;
 798                         if (strncasecmp(s, "spawn", 5) == 0
 799                          || strncasecmp(s, "begin", 5) == 0
 800                          || strncasecmp(s, "prespawn", 8) == 0)
 801                                 Cmd_ExecuteString (s, src_client);
 802                         else if (prog->funcoffsets.SV_ParseClientCommand)
 803                         {
 804                                 int restorevm_tempstringsbuf_cursize;
 805                                 restorevm_tempstringsbuf_cursize = vm_tempstringsbuf.cursize;
 806                                 PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(s);
 807                                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
 808                                 PRVM_ExecuteProgram (prog->funcoffsets.SV_ParseClientCommand, "QC function SV_ParseClientCommand is missing");
 809                                 vm_tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
 810                         }
 811                         else
 812                                 Cmd_ExecuteString (s, src_client);
 813                         break;
 814
 815 clc_stringcmd_invalid:
 816                         Con_Printf("Received invalid stringcmd from %s\n", host_client->name);
 817                         if(developer.integer)
 818                                 Com_HexDumpToConsole((unsigned char *) s, strlen(s));
 819                         break;
 820
 821                 case clc_disconnect:
 822                         SV_DropClient (false); // client wants to disconnect
 823                         return;
 824
 825                 case clc_move:
 826                         SV_ReadClientMove();
 827                         break;
 828
 829                 case clc_ackdownloaddata:
 830                         start = MSG_ReadLong();
 831                         num = MSG_ReadShort();
 832                         if (host_client->download_file && host_client->download_started)
 833                         {
 834                                 if (host_client->download_expectedposition == start)
 835                                 {
 836                                         int size = (int)FS_FileSize(host_client->download_file);
 837                                         // a data block was successfully received by the client,
 838                                         // update the expected position on the next data block
 839                                         host_client->download_expectedposition = start + num;
 840                                         // if this was the last data block of the file, it's done
 841                                         if (host_client->download_expectedposition >= FS_FileSize(host_client->download_file))
 842                                         {
 843                                                 // tell the client that the download finished
 844                                                 // we need to calculate the crc now
 845                                                 //
 846                                                 // note: at this point the OS probably has the file
 847                                                 // entirely in memory, so this is a faster operation
 848                                                 // now than it was when the download started.
 849                                                 //
 850                                                 // it is also preferable to do this at the end of the
 851                                                 // download rather than the start because it reduces
 852                                                 // potential for Denial Of Service attacks against the
 853                                                 // server.
 854                                                 int crc;
 855                                                 unsigned char *temp;
 856                                                 FS_Seek(host_client->download_file, 0, SEEK_SET);
 857                                                 temp = (unsigned char *) Mem_Alloc(tempmempool, size);
 858                                                 FS_Read(host_client->download_file, temp, size);
 859                                                 crc = CRC_Block(temp, size);
 860                                                 Mem_Free(temp);
 861                                                 // calculated crc, send the file info to the client
 862                                                 // (so that it can verify the data)
 863                                                 Host_ClientCommands("\ncl_downloadfinished %i %i %s\n", size, crc, host_client->download_name);
 864                                                 Con_DPrintf("Download of %s by %s has finished\n", host_client->download_name, host_client->name);
 865                                                 FS_Close(host_client->download_file);
 866                                                 host_client->download_file = NULL;
 867                                                 host_client->download_name[0] = 0;
 868                                                 host_client->download_expectedposition = 0;
 869                                                 host_client->download_started = false;
 870                                         }
 871                                 }
 872                                 else
 873                                 {
 874                                         // a data block was lost, reset to the expected position
 875                                         // and resume sending from there
 876                                         FS_Seek(host_client->download_file, host_client->download_expectedposition, SEEK_SET);
 877                                 }
 878                         }
 879                         break;
 880
 881                 case clc_ackframe:
 882                         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 883                         num = MSG_ReadLong();
 884                         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 885                         if (developer_networkentities.integer >= 10)
 886                                 Con_Printf("recv clc_ackframe %i\n", num);
 887                         // if the client hasn't progressed through signons yet,
 888                         // ignore any clc_ackframes we get (they're probably from the
 889                         // previous level)
 890                         if (host_client->spawned && host_client->latestframenum < num)
 891                         {
 892                                 int i;
 893                                 for (i = host_client->latestframenum + 1;i < num;i++)
 894                                         SV_FrameLost(i);
 895                                 SV_FrameAck(num);
 896                                 host_client->latestframenum = num;
 897                         }
 898                         break;
 899                 }
 900         }
 901 }
 902