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
SV_SetIdealPitch(void)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 */
SV_UserFriction(void)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 */
SV_Accelerate(void)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 extern cvar_t sv_gameplayfix_q2airaccelerate;
SV_AirAccelerate(vec3_t wishveloc)169 void SV_AirAccelerate (vec3_t wishveloc)
170 {
171 int i;
172 float addspeed, wishspd, accelspeed, currentspeed;
173
174 wishspd = VectorNormalizeLength (wishveloc);
175 if (wishspd > sv_maxairspeed.value)
176 wishspd = sv_maxairspeed.value;
177 currentspeed = DotProduct (host_client->edict->fields.server->velocity, wishveloc);
178 addspeed = wishspd - currentspeed;
179 if (addspeed <= 0)
180 return;
181 accelspeed = (sv_airaccelerate.value < 0 ? sv_accelerate.value : sv_airaccelerate.value)*(sv_gameplayfix_q2airaccelerate.integer ? wishspd : wishspeed) * sv.frametime;
182 if (accelspeed > addspeed)
183 accelspeed = addspeed;
184
185 for (i=0 ; i<3 ; i++)
186 host_client->edict->fields.server->velocity[i] += accelspeed*wishveloc[i];
187 }
188
189
DropPunchAngle(void)190 void DropPunchAngle (void)
191 {
192 float len;
193 prvm_eval_t *val;
194
195 len = VectorNormalizeLength (host_client->edict->fields.server->punchangle);
196
197 len -= 10*sv.frametime;
198 if (len < 0)
199 len = 0;
200 VectorScale (host_client->edict->fields.server->punchangle, len, host_client->edict->fields.server->punchangle);
201
202 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.punchvector)))
203 {
204 len = VectorNormalizeLength (val->vector);
205
206 len -= 20*sv.frametime;
207 if (len < 0)
208 len = 0;
209 VectorScale (val->vector, len, val->vector);
210 }
211 }
212
213 /*
214 ===================
215 SV_FreeMove
216 ===================
217 */
SV_FreeMove(void)218 void SV_FreeMove (void)
219 {
220 int i;
221 float wishspeed;
222
223 AngleVectors (host_client->edict->fields.server->v_angle, forward, right, up);
224
225 for (i = 0; i < 3; i++)
226 host_client->edict->fields.server->velocity[i] = forward[i] * cmd.forwardmove + right[i] * cmd.sidemove;
227
228 host_client->edict->fields.server->velocity[2] += cmd.upmove;
229
230 wishspeed = VectorLength(host_client->edict->fields.server->velocity);
231 if (wishspeed > sv_maxspeed.value)
232 VectorScale(host_client->edict->fields.server->velocity, sv_maxspeed.value / wishspeed, host_client->edict->fields.server->velocity);
233 }
234
235 /*
236 ===================
237 SV_WaterMove
238
239 ===================
240 */
SV_WaterMove(void)241 void SV_WaterMove (void)
242 {
243 int i;
244 vec3_t wishvel;
245 float speed, newspeed, wishspeed, addspeed, accelspeed, temp;
246
247 // user intentions
248 AngleVectors (host_client->edict->fields.server->v_angle, forward, right, up);
249
250 for (i=0 ; i<3 ; i++)
251 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
252
253 if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
254 wishvel[2] -= 60; // drift towards bottom
255 else
256 wishvel[2] += cmd.upmove;
257
258 wishspeed = VectorLength(wishvel);
259 if (wishspeed > sv_maxspeed.value)
260 {
261 temp = sv_maxspeed.value/wishspeed;
262 VectorScale (wishvel, temp, wishvel);
263 wishspeed = sv_maxspeed.value;
264 }
265 wishspeed *= 0.7;
266
267 // water friction
268 speed = VectorLength(host_client->edict->fields.server->velocity);
269 if (speed)
270 {
271 newspeed = speed - sv.frametime * speed * (sv_waterfriction.value < 0 ? sv_friction.value : sv_waterfriction.value);
272 if (newspeed < 0)
273 newspeed = 0;
274 temp = newspeed/speed;
275 VectorScale(host_client->edict->fields.server->velocity, temp, host_client->edict->fields.server->velocity);
276 }
277 else
278 newspeed = 0;
279
280 // water acceleration
281 if (!wishspeed)
282 return;
283
284 addspeed = wishspeed - newspeed;
285 if (addspeed <= 0)
286 return;
287
288 VectorNormalize (wishvel);
289 accelspeed = (sv_wateraccelerate.value < 0 ? sv_accelerate.value : sv_wateraccelerate.value) * wishspeed * sv.frametime;
290 if (accelspeed > addspeed)
291 accelspeed = addspeed;
292
293 for (i=0 ; i<3 ; i++)
294 host_client->edict->fields.server->velocity[i] += accelspeed * wishvel[i];
295 }
296
SV_WaterJump(void)297 void SV_WaterJump (void)
298 {
299 if (sv.time > host_client->edict->fields.server->teleport_time || !host_client->edict->fields.server->waterlevel)
300 {
301 host_client->edict->fields.server->flags = (int)host_client->edict->fields.server->flags & ~FL_WATERJUMP;
302 host_client->edict->fields.server->teleport_time = 0;
303 }
304 host_client->edict->fields.server->velocity[0] = host_client->edict->fields.server->movedir[0];
305 host_client->edict->fields.server->velocity[1] = host_client->edict->fields.server->movedir[1];
306 }
307
308
309 /*
310 ===================
311 SV_AirMove
312
313 ===================
314 */
SV_AirMove(void)315 void SV_AirMove (void)
316 {
317 int i;
318 vec3_t wishvel;
319 float fmove, smove, temp;
320
321 // LordHavoc: correct quake movement speed bug when looking up/down
322 wishvel[0] = wishvel[2] = 0;
323 wishvel[1] = host_client->edict->fields.server->angles[1];
324 AngleVectors (wishvel, forward, right, up);
325
326 fmove = cmd.forwardmove;
327 smove = cmd.sidemove;
328
329 // hack to not let you back into teleporter
330 if (sv.time < host_client->edict->fields.server->teleport_time && fmove < 0)
331 fmove = 0;
332
333 for (i=0 ; i<3 ; i++)
334 wishvel[i] = forward[i]*fmove + right[i]*smove;
335
336 if ((int)host_client->edict->fields.server->movetype != MOVETYPE_WALK)
337 wishvel[2] += cmd.upmove;
338
339 VectorCopy (wishvel, wishdir);
340 wishspeed = VectorNormalizeLength(wishdir);
341 if (wishspeed > sv_maxspeed.value)
342 {
343 temp = sv_maxspeed.value/wishspeed;
344 VectorScale (wishvel, temp, wishvel);
345 wishspeed = sv_maxspeed.value;
346 }
347
348 if (host_client->edict->fields.server->movetype == MOVETYPE_NOCLIP)
349 {
350 // noclip
351 VectorCopy (wishvel, host_client->edict->fields.server->velocity);
352 }
353 else if (onground)
354 {
355 SV_UserFriction ();
356 SV_Accelerate ();
357 }
358 else
359 {
360 // not on ground, so little effect on velocity
361 SV_AirAccelerate (wishvel);
362 }
363 }
364
365 /*
366 ===================
367 SV_ClientThink
368
369 the move fields specify an intended velocity in pix/sec
370 the angle fields specify an exact angular motion in degrees
371 ===================
372 */
SV_ClientThink(void)373 void SV_ClientThink (void)
374 {
375 vec3_t v_angle;
376
377 //Con_Printf("clientthink for %ims\n", (int) (sv.frametime * 1000));
378
379 SV_ApplyClientMove();
380 // make sure the velocity is sane (not a NaN)
381 SV_CheckVelocity(host_client->edict);
382
383 // LordHavoc: QuakeC replacement for SV_ClientThink (player movement)
384 if (prog->funcoffsets.SV_PlayerPhysics && sv_playerphysicsqc.integer)
385 {
386 prog->globals.server->time = sv.time;
387 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
388 PRVM_ExecuteProgram (prog->funcoffsets.SV_PlayerPhysics, "QC function SV_PlayerPhysics is missing");
389 SV_CheckVelocity(host_client->edict);
390 return;
391 }
392
393 if (host_client->edict->fields.server->movetype == MOVETYPE_NONE)
394 return;
395
396 onground = ((int)host_client->edict->fields.server->flags & FL_ONGROUND) != 0;
397
398 DropPunchAngle ();
399
400 // if dead, behave differently
401 if (host_client->edict->fields.server->health <= 0)
402 return;
403
404 cmd = host_client->cmd;
405
406 // angles
407 // show 1/3 the pitch angle and all the roll angle
408 VectorAdd (host_client->edict->fields.server->v_angle, host_client->edict->fields.server->punchangle, v_angle);
409 host_client->edict->fields.server->angles[ROLL] = V_CalcRoll (host_client->edict->fields.server->angles, host_client->edict->fields.server->velocity)*4;
410 if (!host_client->edict->fields.server->fixangle)
411 {
412 host_client->edict->fields.server->angles[PITCH] = -v_angle[PITCH]/3;
413 host_client->edict->fields.server->angles[YAW] = v_angle[YAW];
414 }
415
416 if ( (int)host_client->edict->fields.server->flags & FL_WATERJUMP )
417 {
418 SV_WaterJump ();
419 SV_CheckVelocity(host_client->edict);
420 return;
421 }
422
423 /*
424 // Player is (somehow) outside of the map, or flying, or noclipping
425 if (host_client->edict->fields.server->movetype != MOVETYPE_NOCLIP && (host_client->edict->fields.server->movetype == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict)))
426 //if (host_client->edict->fields.server->movetype == MOVETYPE_NOCLIP || host_client->edict->fields.server->movetype == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict))
427 {
428 SV_FreeMove ();
429 return;
430 }
431 */
432
433 // walk
434 if ((host_client->edict->fields.server->waterlevel >= 2) && (host_client->edict->fields.server->movetype != MOVETYPE_NOCLIP))
435 {
436 SV_WaterMove ();
437 SV_CheckVelocity(host_client->edict);
438 return;
439 }
440
441 SV_AirMove ();
442 SV_CheckVelocity(host_client->edict);
443 }
444
445 /*
446 ===================
447 SV_ReadClientMove
448 ===================
449 */
450 int sv_numreadmoves = 0;
451 usercmd_t sv_readmoves[CL_MAX_USERCMDS];
SV_ReadClientMove(void)452 void SV_ReadClientMove (void)
453 {
454 int i;
455 usercmd_t newmove;
456 usercmd_t *move = &newmove;
457
458 memset(move, 0, sizeof(*move));
459
460 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
461
462 // read ping time
463 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)
464 move->sequence = MSG_ReadLong ();
465 move->time = move->clienttime = MSG_ReadFloat ();
466 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
467 move->receivetime = (float)sv.time;
468
469 #if DEBUGMOVES
470 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);
471 #endif
472 // limit reported time to current time
473 // (incase the client is trying to cheat)
474 move->time = min(move->time, move->receivetime + sv.frametime);
475
476 // read current angles
477 for (i = 0;i < 3;i++)
478 {
479 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)
480 move->viewangles[i] = MSG_ReadAngle8i();
481 else if (sv.protocol == PROTOCOL_DARKPLACES1)
482 move->viewangles[i] = MSG_ReadAngle16i();
483 else if (sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3)
484 move->viewangles[i] = MSG_ReadAngle32f();
485 else
486 move->viewangles[i] = MSG_ReadAngle16i();
487 }
488 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
489
490 // read movement
491 move->forwardmove = MSG_ReadCoord16i ();
492 move->sidemove = MSG_ReadCoord16i ();
493 move->upmove = MSG_ReadCoord16i ();
494 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
495
496 // read buttons
497 // be sure to bitwise OR them into the move->buttons because we want to
498 // accumulate button presses from multiple packets per actual move
499 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)
500 move->buttons = MSG_ReadByte ();
501 else
502 move->buttons = MSG_ReadLong ();
503 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
504
505 // read impulse
506 move->impulse = MSG_ReadByte ();
507 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
508
509 // PRYDON_CLIENTCURSOR
510 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)
511 {
512 // 30 bytes
513 move->cursor_screen[0] = MSG_ReadShort() * (1.0f / 32767.0f);
514 move->cursor_screen[1] = MSG_ReadShort() * (1.0f / 32767.0f);
515 move->cursor_start[0] = MSG_ReadFloat();
516 move->cursor_start[1] = MSG_ReadFloat();
517 move->cursor_start[2] = MSG_ReadFloat();
518 move->cursor_impact[0] = MSG_ReadFloat();
519 move->cursor_impact[1] = MSG_ReadFloat();
520 move->cursor_impact[2] = MSG_ReadFloat();
521 move->cursor_entitynumber = (unsigned short)MSG_ReadShort();
522 if (move->cursor_entitynumber >= prog->max_edicts)
523 {
524 Con_DPrintf("SV_ReadClientMessage: client send bad cursor_entitynumber\n");
525 move->cursor_entitynumber = 0;
526 }
527 // as requested by FrikaC, cursor_trace_ent is reset to world if the
528 // entity is free at time of receipt
529 if (PRVM_EDICT_NUM(move->cursor_entitynumber)->priv.server->free)
530 move->cursor_entitynumber = 0;
531 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
532 }
533
534 // if the previous move has not been applied yet, we need to accumulate
535 // the impulse/buttons from it
536 if (!host_client->cmd.applied)
537 {
538 if (!move->impulse)
539 move->impulse = host_client->cmd.impulse;
540 move->buttons |= host_client->cmd.buttons;
541 }
542
543 // now store this move for later execution
544 // (we have to buffer the moves because of old ones being repeated)
545 if (sv_numreadmoves < CL_MAX_USERCMDS)
546 sv_readmoves[sv_numreadmoves++] = *move;
547 }
548
SV_ExecuteClientMoves(void)549 void SV_ExecuteClientMoves(void)
550 {
551 int moveindex;
552 float moveframetime;
553 double oldframetime;
554 double oldframetime2;
555 #ifdef NUM_PING_TIMES
556 double total;
557 #endif
558 prvm_eval_t *val;
559 if (sv_numreadmoves < 1)
560 return;
561 // only start accepting input once the player is spawned
562 if (!host_client->spawned)
563 return;
564 #if DEBUGMOVES
565 Con_Printf("SV_ExecuteClientMoves: read %i moves at sv.time %f\n", sv_numreadmoves, (float)sv.time);
566 #endif
567 // disable clientside movement prediction in some cases
568 if (ceil(max(sv_readmoves[sv_numreadmoves-1].receivetime - sv_readmoves[sv_numreadmoves-1].time, 0) * 1000.0) < sv_clmovement_minping.integer)
569 host_client->clmovement_disabletimeout = realtime + sv_clmovement_minping_disabletime.value / 1000.0;
570 // several conditions govern whether clientside movement prediction is allowed
571 if (sv_readmoves[sv_numreadmoves-1].sequence && sv_clmovement_enable.integer && sv_clmovement_inputtimeout.value > 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))
572 {
573 // process the moves in order and ignore old ones
574 // but always trust the latest move
575 // (this deals with bogus initial move sequences after level change,
576 // where the client will eventually catch up with the level change
577 // and reset its move sequence)
578 for (moveindex = 0;moveindex < sv_numreadmoves;moveindex++)
579 {
580 usercmd_t *move = sv_readmoves + moveindex;
581 if (host_client->movesequence < move->sequence || moveindex == sv_numreadmoves - 1)
582 {
583 #if DEBUGMOVES
584 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);
585 #endif
586 // this is a new move
587 move->time = bound(sv.time - 1, move->time, sv.time); // prevent slowhack/speedhack combos
588 move->time = max(move->time, host_client->cmd.time); // prevent backstepping of time
589 moveframetime = bound(0, move->time - host_client->cmd.time, min(0.1, sv_clmovement_inputtimeout.value));
590
591 // discard (treat like lost) moves with too low distance from
592 // the previous one to prevent hacks using float inaccuracy
593 // clients will see this as packet loss in the netgraph
594 if(moveframetime < 0.0005)
595 continue;
596
597 //Con_Printf("movesequence = %i (%i lost), moveframetime = %f\n", move->sequence, move->sequence ? move->sequence - host_client->movesequence - 1 : 0, moveframetime);
598 host_client->cmd = *move;
599 host_client->movesequence = move->sequence;
600
601 // if using prediction, we need to perform moves when packets are
602 // received, even if multiple occur in one frame
603 // (they can't go beyond the current time so there is no cheat issue
604 // with this approach, and if they don't send input for a while they
605 // start moving anyway, so the longest 'lagaport' possible is
606 // determined by the sv_clmovement_inputtimeout cvar)
607 if (moveframetime <= 0)
608 continue;
609 oldframetime = prog->globals.server->frametime;
610 oldframetime2 = sv.frametime;
611 // update ping time for qc to see while executing this move
612 host_client->ping = host_client->cmd.receivetime - host_client->cmd.time;
613 // the server and qc frametime values must be changed temporarily
614 prog->globals.server->frametime = sv.frametime = moveframetime;
615 // if move is more than 50ms, split it into two moves (this matches QWSV behavior and the client prediction)
616 if (sv.frametime > 0.05)
617 {
618 prog->globals.server->frametime = sv.frametime = moveframetime * 0.5f;
619 SV_Physics_ClientMove();
620 }
621 SV_Physics_ClientMove();
622 sv.frametime = oldframetime2;
623 prog->globals.server->frametime = oldframetime;
624 host_client->clmovement_inputtimeout = sv_clmovement_inputtimeout.value;
625 }
626 }
627 }
628 else
629 {
630 // try to gather button bits from old moves, but only if their time is
631 // advancing (ones with the same timestamp can't be trusted)
632 for (moveindex = 0;moveindex < sv_numreadmoves-1;moveindex++)
633 {
634 usercmd_t *move = sv_readmoves + moveindex;
635 if (host_client->cmd.time < move->time)
636 {
637 sv_readmoves[sv_numreadmoves-1].buttons |= move->buttons;
638 if (move->impulse)
639 sv_readmoves[sv_numreadmoves-1].impulse = move->impulse;
640 }
641 }
642 // now copy the new move
643 host_client->cmd = sv_readmoves[sv_numreadmoves-1];
644 host_client->cmd.time = max(host_client->cmd.time, sv.time);
645 // physics will run up to sv.time, so allow no predicted moves
646 // before that otherwise, there is a speedhack by turning
647 // prediction on and off repeatedly on client side because the
648 // engine would run BOTH client and server physics for the same
649 // time
650 host_client->movesequence = 0;
651 // make sure that normal physics takes over immediately
652 host_client->clmovement_inputtimeout = 0;
653 }
654
655 // calculate average ping time
656 host_client->ping = host_client->cmd.receivetime - host_client->cmd.clienttime;
657 #ifdef NUM_PING_TIMES
658 host_client->ping_times[host_client->num_pings % NUM_PING_TIMES] = host_client->cmd.receivetime - host_client->cmd.clienttime;
659 host_client->num_pings++;
660 for (i=0, total = 0;i < NUM_PING_TIMES;i++)
661 total += host_client->ping_times[i];
662 host_client->ping = total / NUM_PING_TIMES;
663 #endif
664 }
665
SV_ApplyClientMove(void)666 void SV_ApplyClientMove (void)
667 {
668 prvm_eval_t *val;
669 usercmd_t *move = &host_client->cmd;
670
671 if (!move->receivetime)
672 return;
673
674 // note: a move can be applied multiple times if the client packets are
675 // not coming as often as the physics is executed, and the move must be
676 // applied before running qc each time because the id1 qc had a bug where
677 // it clears self.button2 in PlayerJump, causing pogostick behavior if
678 // moves are not applied every time before calling qc
679 move->applied = true;
680
681 // set the edict fields
682 host_client->edict->fields.server->button0 = move->buttons & 1;
683 host_client->edict->fields.server->button2 = (move->buttons & 2)>>1;
684 if (move->impulse)
685 host_client->edict->fields.server->impulse = move->impulse;
686 // only send the impulse to qc once
687 move->impulse = 0;
688 VectorCopy(move->viewangles, host_client->edict->fields.server->v_angle);
689 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button3))) val->_float = ((move->buttons >> 2) & 1);
690 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button4))) val->_float = ((move->buttons >> 3) & 1);
691 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button5))) val->_float = ((move->buttons >> 4) & 1);
692 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button6))) val->_float = ((move->buttons >> 5) & 1);
693 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button7))) val->_float = ((move->buttons >> 6) & 1);
694 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button8))) val->_float = ((move->buttons >> 7) & 1);
695 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button9))) val->_float = ((move->buttons >> 11) & 1);
696 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button10))) val->_float = ((move->buttons >> 12) & 1);
697 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button11))) val->_float = ((move->buttons >> 13) & 1);
698 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button12))) val->_float = ((move->buttons >> 14) & 1);
699 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button13))) val->_float = ((move->buttons >> 15) & 1);
700 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button14))) val->_float = ((move->buttons >> 16) & 1);
701 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button15))) val->_float = ((move->buttons >> 17) & 1);
702 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button16))) val->_float = ((move->buttons >> 18) & 1);
703 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.buttonuse))) val->_float = ((move->buttons >> 8) & 1);
704 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.buttonchat))) val->_float = ((move->buttons >> 9) & 1);
705 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_active))) val->_float = ((move->buttons >> 10) & 1);
706 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.movement))) VectorSet(val->vector, move->forwardmove, move->sidemove, move->upmove);
707 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_screen))) VectorCopy(move->cursor_screen, val->vector);
708 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_start))) VectorCopy(move->cursor_start, val->vector);
709 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_endpos))) VectorCopy(move->cursor_impact, val->vector);
710 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_ent))) val->edict = PRVM_EDICT_TO_PROG(PRVM_EDICT_NUM(move->cursor_entitynumber));
711 if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.ping))) val->_float = host_client->ping * 1000.0;
712 }
713
SV_FrameLost(int framenum)714 void SV_FrameLost(int framenum)
715 {
716 if (host_client->entitydatabase5)
717 {
718 EntityFrame5_LostFrame(host_client->entitydatabase5, framenum);
719 EntityFrameCSQC_LostFrame(host_client, framenum);
720 }
721 }
722
SV_FrameAck(int framenum)723 void SV_FrameAck(int framenum)
724 {
725 if (host_client->entitydatabase)
726 EntityFrame_AckFrame(host_client->entitydatabase, framenum);
727 else if (host_client->entitydatabase4)
728 EntityFrame4_AckFrame(host_client->entitydatabase4, framenum, true);
729 else if (host_client->entitydatabase5)
730 EntityFrame5_AckFrame(host_client->entitydatabase5, framenum);
731 }
732
733 /*
734 ===================
735 SV_ReadClientMessage
736 ===================
737 */
738 extern void SV_SendServerinfo(client_t *client);
739 extern sizebuf_t vm_tempstringsbuf;
SV_ReadClientMessage(void)740 void SV_ReadClientMessage(void)
741 {
742 int cmd, num, start;
743 char *s, *p, *q;
744
745 if(sv_autodemo_perclient.integer >= 2)
746 SV_WriteDemoMessage(host_client, &(host_client->netconnection->message), true);
747
748 //MSG_BeginReading ();
749 sv_numreadmoves = 0;
750
751 for(;;)
752 {
753 if (!host_client->active)
754 {
755 // a command caused an error
756 SV_DropClient (false);
757 return;
758 }
759
760 if (msg_badread)
761 {
762 Con_Print("SV_ReadClientMessage: badread\n");
763 SV_DropClient (false);
764 return;
765 }
766
767 cmd = MSG_ReadByte ();
768 if (cmd == -1)
769 {
770 // end of message
771 // apply the moves that were read this frame
772 SV_ExecuteClientMoves();
773 break;
774 }
775
776 switch (cmd)
777 {
778 default:
779 Con_Printf("SV_ReadClientMessage: unknown command char %i\n", cmd);
780 SV_DropClient (false);
781 return;
782
783 case clc_nop:
784 break;
785
786 case clc_stringcmd:
787 // allow reliable messages now as the client is done with initial loading
788 if (host_client->sendsignon == 2)
789 host_client->sendsignon = 0;
790 s = MSG_ReadString ();
791 q = NULL;
792 for(p = s; *p; ++p) switch(*p)
793 {
794 case 10:
795 case 13:
796 if(!q)
797 q = p;
798 break;
799 default:
800 if(q)
801 goto clc_stringcmd_invalid; // newline seen, THEN something else -> possible exploit
802 break;
803 }
804 if(q)
805 *q = 0;
806 if (strncasecmp(s, "spawn", 5) == 0
807 || strncasecmp(s, "begin", 5) == 0
808 || strncasecmp(s, "prespawn", 8) == 0)
809 Cmd_ExecuteString (s, src_client);
810 else if (prog->funcoffsets.SV_ParseClientCommand)
811 {
812 int restorevm_tempstringsbuf_cursize;
813 restorevm_tempstringsbuf_cursize = vm_tempstringsbuf.cursize;
814 PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(s);
815 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
816 PRVM_ExecuteProgram (prog->funcoffsets.SV_ParseClientCommand, "QC function SV_ParseClientCommand is missing");
817 vm_tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
818 }
819 else
820 Cmd_ExecuteString (s, src_client);
821 break;
822
823 clc_stringcmd_invalid:
824 Con_Printf("Received invalid stringcmd from %s\n", host_client->name);
825 if(developer.integer)
826 Com_HexDumpToConsole((unsigned char *) s, strlen(s));
827 break;
828
829 case clc_disconnect:
830 SV_DropClient (false); // client wants to disconnect
831 return;
832
833 case clc_move:
834 SV_ReadClientMove();
835 break;
836
837 case clc_ackdownloaddata:
838 start = MSG_ReadLong();
839 num = MSG_ReadShort();
840 if (host_client->download_file && host_client->download_started)
841 {
842 if (host_client->download_expectedposition == start)
843 {
844 int size = (int)FS_FileSize(host_client->download_file);
845 // a data block was successfully received by the client,
846 // update the expected position on the next data block
847 host_client->download_expectedposition = start + num;
848 // if this was the last data block of the file, it's done
849 if (host_client->download_expectedposition >= FS_FileSize(host_client->download_file))
850 {
851 // tell the client that the download finished
852 // we need to calculate the crc now
853 //
854 // note: at this point the OS probably has the file
855 // entirely in memory, so this is a faster operation
856 // now than it was when the download started.
857 //
858 // it is also preferable to do this at the end of the
859 // download rather than the start because it reduces
860 // potential for Denial Of Service attacks against the
861 // server.
862 int crc;
863 unsigned char *temp;
864 FS_Seek(host_client->download_file, 0, SEEK_SET);
865 temp = (unsigned char *) Mem_Alloc(tempmempool, size);
866 FS_Read(host_client->download_file, temp, size);
867 crc = CRC_Block(temp, size);
868 Mem_Free(temp);
869 // calculated crc, send the file info to the client
870 // (so that it can verify the data)
871 Host_ClientCommands("\ncl_downloadfinished %i %i %s\n", size, crc, host_client->download_name);
872 Con_DPrintf("Download of %s by %s has finished\n", host_client->download_name, host_client->name);
873 FS_Close(host_client->download_file);
874 host_client->download_file = NULL;
875 host_client->download_name[0] = 0;
876 host_client->download_expectedposition = 0;
877 host_client->download_started = false;
878 }
879 }
880 else
881 {
882 // a data block was lost, reset to the expected position
883 // and resume sending from there
884 FS_Seek(host_client->download_file, host_client->download_expectedposition, SEEK_SET);
885 }
886 }
887 break;
888
889 case clc_ackframe:
890 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
891 num = MSG_ReadLong();
892 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
893 if (developer_networkentities.integer >= 10)
894 Con_Printf("recv clc_ackframe %i\n", num);
895 // if the client hasn't progressed through signons yet,
896 // ignore any clc_ackframes we get (they're probably from the
897 // previous level)
898 if (host_client->spawned && host_client->latestframenum < num)
899 {
900 int i;
901 for (i = host_client->latestframenum + 1;i < num;i++)
902 SV_FrameLost(i);
903 SV_FrameAck(num);
904 host_client->latestframenum = num;
905 }
906 break;
907 }
908 }
909 }
910
911