4 #include "../dpdefs/progsdefs.qh"
5 #include "../dpdefs/dpextensions.qh"
6 #include "../warpzonelib/mathlib.qh"
7 #include "autocvars.qh"
9 #include "command/common.qh"
10 #include "anticheat.qh"
13 .float anticheat_jointime;
15 void mean_accumulate(entity e, .float a, .float c, float mean, float value, float weight)
20 e.a *= pow(value, weight);
22 e.a += pow(value, mean) * weight;
26 float mean_evaluate(entity e, .float a, .float c, float mean)
31 return pow(e.a, 1.0 / e.c);
33 return pow(e.a / e.c, 1.0 / mean);
36 #define MEAN_ACCUMULATE(prefix,v,w) mean_accumulate(self,prefix##_accumulator,prefix##_count,prefix##_mean,v,w)
37 #define MEAN_EVALUATE(prefix) mean_evaluate(self,prefix##_accumulator,prefix##_count,prefix##_mean)
38 #define MEAN_DECLARE(prefix,m) float prefix##_mean = m; .float prefix##_count, prefix##_accumulator
40 .float anticheat_fixangle_endtime;
42 float anticheat_div0_evade_evasion_delta;
43 .float anticheat_div0_evade_offset;
44 .vector anticheat_div0_evade_v_angle;
45 .vector anticheat_div0_evade_forward_initial;
46 MEAN_DECLARE(anticheat_div0_evade, 5);
48 .vector anticheat_div0_strafebot_movement_prev;
49 MEAN_DECLARE(anticheat_div0_strafebot_old, 5);
51 .vector anticheat_div0_strafebot_forward_prev;
52 MEAN_DECLARE(anticheat_div0_strafebot_new, 5);
54 // Snap-aim detection: we track the average angular speed of aiming over time, in "radians per second".
55 // Signal: a high-power mean. Cheaters will have high "signal" here.
56 // Noise: a low-power mean. Active/shivery players will have high "noise" here.
57 // Note one can always artificially add noise - so very high values of both signal and noise need to be checked too.
58 MEAN_DECLARE(anticheat_idle_snapaim_signal, 5);
59 MEAN_DECLARE(anticheat_idle_snapaim_noise, 1);
62 MEAN_DECLARE(anticheat_idle_snapaim_m2, 2);
63 MEAN_DECLARE(anticheat_idle_snapaim_m3, 3);
64 MEAN_DECLARE(anticheat_idle_snapaim_m4, 4);
65 MEAN_DECLARE(anticheat_idle_snapaim_m7, 7);
66 MEAN_DECLARE(anticheat_idle_snapaim_m10, 10);
68 .float anticheat_speedhack_offset;
69 .float anticheat_speedhack_movetime, anticheat_speedhack_movetime_count, anticheat_speedhack_movetime_frac;
70 MEAN_DECLARE(anticheat_speedhack, 5);
72 .float anticheat_speedhack_accu;
73 .float anticheat_speedhack_lasttime;
74 MEAN_DECLARE(anticheat_speedhack_m1, 1);
75 MEAN_DECLARE(anticheat_speedhack_m2, 2);
76 MEAN_DECLARE(anticheat_speedhack_m3, 3);
77 MEAN_DECLARE(anticheat_speedhack_m4, 4);
78 MEAN_DECLARE(anticheat_speedhack_m5, 5);
80 float movement_oddity(vector m0, vector m1)
82 float cosangle = normalize(m0) * normalize(m1);
85 return 0.5 - 0.5 * cos(cosangle * cosangle * 4 * M_PI);
86 // returns 0 for: -1, -sqrt(0.5), 0 (angles that commonly happen with kbd)
89 void anticheat_physics()
93 // div0_evade -> SPECTATORS
94 makevectors(self.v_angle);
95 if(self.anticheat_div0_evade_offset == 0)
97 f = fabs(anticheat_div0_evade_evasion_delta - floor(anticheat_div0_evade_evasion_delta) - 0.5) * 2; // triangle function
98 self.anticheat_div0_evade_offset = servertime + sys_frametime * (3 * f - 1);
99 self.anticheat_div0_evade_v_angle = self.v_angle;
100 self.anticheat_div0_evade_forward_initial = v_forward;
101 MEAN_ACCUMULATE(anticheat_div0_evade, 0, 1);
105 if(time < self.anticheat_div0_evade_offset)
106 self.anticheat_div0_evade_v_angle = self.v_angle;
107 MEAN_ACCUMULATE(anticheat_div0_evade, 0.5 - 0.5 * (self.anticheat_div0_evade_forward_initial * v_forward), 1);
110 MEAN_ACCUMULATE(anticheat_div0_strafebot_old, movement_oddity(self.movement, self.anticheat_div0_strafebot_movement_prev), 1);
111 self.anticheat_div0_strafebot_movement_prev = self.movement;
113 // Note: this actually tries to detect snap-aim.
114 if(vlen(self.anticheat_div0_strafebot_forward_prev) && time > self.anticheat_fixangle_endtime) {
115 float cosangle = self.anticheat_div0_strafebot_forward_prev * v_forward;
116 float angle = cosangle < -1 ? M_PI : cosangle > 1 ? 0 : acos(cosangle);
118 if (angle >= 10 * M_PI / 180)
119 printf("SNAP %s: %f for %f, %f since fixangle\n", self.netname, angle * 180 / M_PI, cosangle, time - self.anticheat_fixangle_endtime);
121 MEAN_ACCUMULATE(anticheat_div0_strafebot_new, angle / M_PI, 1);
123 if (autocvar_slowmo > 0) {
124 // Technically this is a NOP, as the engine should be ensuring
125 // this in the first place. Let's guard against dividing by
127 float dt = max(0.001, frametime) / autocvar_slowmo;
129 float anglespeed = angle / dt;
130 MEAN_ACCUMULATE(anticheat_idle_snapaim_signal, anglespeed, dt);
131 MEAN_ACCUMULATE(anticheat_idle_snapaim_noise, anglespeed, dt);
132 MEAN_ACCUMULATE(anticheat_idle_snapaim_m2, anglespeed, dt);
133 MEAN_ACCUMULATE(anticheat_idle_snapaim_m3, anglespeed, dt);
134 MEAN_ACCUMULATE(anticheat_idle_snapaim_m4, anglespeed, dt);
135 MEAN_ACCUMULATE(anticheat_idle_snapaim_m7, anglespeed, dt);
136 MEAN_ACCUMULATE(anticheat_idle_snapaim_m10, anglespeed, dt);
139 self.anticheat_div0_strafebot_forward_prev = v_forward;
141 // generic speedhack detection: correlate anticheat_speedhack_movetime (UPDATED BEFORE THIS) and server time
142 self.anticheat_speedhack_movetime_frac += frametime;
143 f = floor(self.anticheat_speedhack_movetime_frac);
144 self.anticheat_speedhack_movetime_frac -= f;
145 self.anticheat_speedhack_movetime_count += f;
146 self.anticheat_speedhack_movetime = self.anticheat_speedhack_movetime_frac + self.anticheat_speedhack_movetime_count;
147 f = self.anticheat_speedhack_movetime - servertime;
148 if(self.anticheat_speedhack_offset == 0)
149 self.anticheat_speedhack_offset = f;
152 MEAN_ACCUMULATE(anticheat_speedhack, max(0, f - self.anticheat_speedhack_offset), 1);
153 self.anticheat_speedhack_offset += (f - self.anticheat_speedhack_offset) * frametime * 0.1;
156 // new generic speedhack detection
157 if (self.anticheat_speedhack_lasttime > 0) {
158 float dt = servertime - self.anticheat_speedhack_lasttime;
159 const float falloff = 0.2;
160 self.anticheat_speedhack_accu *= exp(-dt * falloff);
161 self.anticheat_speedhack_accu += frametime * falloff;
162 // NOTE: at cl_netfps x, this actually averages not to 1, but to 1/x * falloff / (1 - exp(-1/x * falloff))
163 // For 15 netfps (absolute minimum bearable), and 0.2 falloff, this is: 1.0067
164 self.anticheat_speedhack_lasttime = servertime;
165 MEAN_ACCUMULATE(anticheat_speedhack_m1, self.anticheat_speedhack_accu, frametime);
166 MEAN_ACCUMULATE(anticheat_speedhack_m2, self.anticheat_speedhack_accu, frametime);
167 MEAN_ACCUMULATE(anticheat_speedhack_m3, self.anticheat_speedhack_accu, frametime);
168 MEAN_ACCUMULATE(anticheat_speedhack_m4, self.anticheat_speedhack_accu, frametime);
169 MEAN_ACCUMULATE(anticheat_speedhack_m5, self.anticheat_speedhack_accu, frametime);
171 self.anticheat_speedhack_accu = 1;
172 self.anticheat_speedhack_lasttime = servertime;
176 void anticheat_spectatecopy(entity spectatee)
178 // div0_evade -> SPECTATORS
179 self.angles = spectatee.anticheat_div0_evade_v_angle;
182 void anticheat_prethink()
184 // div0_evade -> SPECTATORS
185 self.anticheat_div0_evade_offset = 0;
188 string anticheat_display(float f, float tmin, float mi, float ma)
193 return strcat(s, ":N");
195 return strcat(s, ":Y");
196 return strcat(s, ":-");
199 void anticheat_report()
201 if(!autocvar_sv_eventlog)
203 // TODO(divVerent): Use xonstat to acquire good thresholds.
204 GameLogEcho(strcat(":anticheat:_time:", ftos(self.playerid), ":", ftos(servertime - self.anticheat_jointime)));
205 GameLogEcho(strcat(":anticheat:speedhack:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_speedhack), 240, 0, 9999))); // Actually this one seems broken.
206 GameLogEcho(strcat(":anticheat:speedhack_m1:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_speedhack_m1), 240, 1.01, 1.25)));
207 GameLogEcho(strcat(":anticheat:speedhack_m2:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_speedhack_m2), 240, 1.01, 1.25)));
208 GameLogEcho(strcat(":anticheat:speedhack_m3:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_speedhack_m3), 240, 1.01, 1.25)));
209 GameLogEcho(strcat(":anticheat:speedhack_m4:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_speedhack_m4), 240, 1.01, 1.25)));
210 GameLogEcho(strcat(":anticheat:speedhack_m5:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_speedhack_m5), 240, 1.01, 1.25)));
211 GameLogEcho(strcat(":anticheat:div0_strafebot_old:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_div0_strafebot_old), 120, 0.15, 0.4)));
212 GameLogEcho(strcat(":anticheat:div0_strafebot_new:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_div0_strafebot_new), 120, 0.25, 0.8)));
213 GameLogEcho(strcat(":anticheat:div0_evade:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_div0_evade), 120, 0.2, 0.5)));
214 GameLogEcho(strcat(":anticheat:idle_snapaim:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_idle_snapaim_signal) - MEAN_EVALUATE(anticheat_idle_snapaim_noise), 120, 0, 9999)));
215 GameLogEcho(strcat(":anticheat:idle_snapaim_signal:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_idle_snapaim_signal), 120, 0, 9999)));
216 GameLogEcho(strcat(":anticheat:idle_snapaim_noise:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_idle_snapaim_noise), 120, 0, 9999)));
217 GameLogEcho(strcat(":anticheat:idle_snapaim_m2:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_idle_snapaim_m2), 120, 0, 9999)));
218 GameLogEcho(strcat(":anticheat:idle_snapaim_m3:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_idle_snapaim_m3), 120, 0, 9999)));
219 GameLogEcho(strcat(":anticheat:idle_snapaim_m4:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_idle_snapaim_m4), 120, 0, 9999)));
220 GameLogEcho(strcat(":anticheat:idle_snapaim_m7:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_idle_snapaim_m7), 120, 0, 9999)));
221 GameLogEcho(strcat(":anticheat:idle_snapaim_m10:", ftos(self.playerid), ":", anticheat_display(MEAN_EVALUATE(anticheat_idle_snapaim_m10), 120, 0, 9999)));
224 float anticheat_getvalue(string id)
227 case "_time": return servertime - self.anticheat_jointime;
228 case "speedhack": return MEAN_EVALUATE(anticheat_speedhack);
229 case "speedhack_m1": return MEAN_EVALUATE(anticheat_speedhack_m1);
230 case "speedhack_m2": return MEAN_EVALUATE(anticheat_speedhack_m2);
231 case "speedhack_m3": return MEAN_EVALUATE(anticheat_speedhack_m3);
232 case "speedhack_m4": return MEAN_EVALUATE(anticheat_speedhack_m4);
233 case "speedhack_m5": return MEAN_EVALUATE(anticheat_speedhack_m5);
234 case "div0_strafebot_old": return MEAN_EVALUATE(anticheat_div0_strafebot_old);
235 case "div0_strafebot_new": return MEAN_EVALUATE(anticheat_div0_strafebot_new);
236 case "div0_evade": return MEAN_EVALUATE(anticheat_div0_evade);
237 case "idle_snapaim": return MEAN_EVALUATE(anticheat_idle_snapaim_signal) - MEAN_EVALUATE(anticheat_idle_snapaim_noise);
238 case "idle_snapaim_signal": return MEAN_EVALUATE(anticheat_idle_snapaim_signal);
239 case "idle_snapaim_noise": return MEAN_EVALUATE(anticheat_idle_snapaim_noise);
240 case "idle_snapaim_m2": return MEAN_EVALUATE(anticheat_idle_snapaim_m2);
241 case "idle_snapaim_m3": return MEAN_EVALUATE(anticheat_idle_snapaim_m3);
242 case "idle_snapaim_m4": return MEAN_EVALUATE(anticheat_idle_snapaim_m4);
243 case "idle_snapaim_m7": return MEAN_EVALUATE(anticheat_idle_snapaim_m7);
244 case "idle_snapaim_m10": return MEAN_EVALUATE(anticheat_idle_snapaim_m10);
249 void anticheat_startframe()
251 anticheat_div0_evade_evasion_delta += frametime * (0.5 + random());
254 void anticheat_fixangle()
256 self.anticheat_fixangle_endtime = servertime + ANTILAG_LATENCY(self) + 0.2;
259 void anticheat_endframe()
261 entity oldself = self;
262 FOR_EACH_CLIENT(self)
264 anticheat_fixangle();
266 anticheat_div0_evade_evasion_delta += frametime * (0.5 + random());
269 void anticheat_init()
271 self.anticheat_speedhack_offset = 0;
272 self.anticheat_jointime = servertime;
275 void anticheat_shutdown()