1 #include "anticheat.qh"
4 #include "autocvars.qh"
5 #include <common/weapons/_all.qh>
6 #include <common/stats.qh>
7 #include <server/client.qh>
8 #include <server/gamelog.qh>
9 #include <server/main.qh>
11 #include "command/common.qh"
12 #include <common/playerstats.qh>
13 #include <common/state.qh>
15 .float anticheat_jointime;
17 .float anticheat_fixangle_endtime;
19 float anticheat_div0_evade_evasion_delta;
20 .float anticheat_div0_evade_offset;
21 .vector anticheat_div0_evade_v_angle;
22 .vector anticheat_div0_evade_forward_initial;
23 MEAN_DECLARE(anticheat_div0_evade, 5);
25 .vector anticheat_div0_strafebot_movement_prev;
26 MEAN_DECLARE(anticheat_div0_strafebot_old, 5);
28 .vector anticheat_div0_strafebot_forward_prev;
29 MEAN_DECLARE(anticheat_div0_strafebot_new, 5);
31 // Snap-aim detection: we track the average angular speed of aiming over time, in "radians per second".
32 // Signal: a high-power mean. Cheaters will have high "signal" here.
33 // Noise: a low-power mean. Active/shivery players will have high "noise" here.
34 // Note one can always artificially add noise - so very high values of both signal and noise need to be checked too.
35 MEAN_DECLARE(anticheat_idle_snapaim_signal, 5);
36 MEAN_DECLARE(anticheat_idle_snapaim_noise, 1);
39 MEAN_DECLARE(anticheat_idle_snapaim_m2, 2);
40 MEAN_DECLARE(anticheat_idle_snapaim_m3, 3);
41 MEAN_DECLARE(anticheat_idle_snapaim_m4, 4);
42 MEAN_DECLARE(anticheat_idle_snapaim_m7, 7);
43 MEAN_DECLARE(anticheat_idle_snapaim_m10, 10);
45 .float anticheat_speedhack_offset;
46 .float anticheat_speedhack_movetime, anticheat_speedhack_movetime_count, anticheat_speedhack_movetime_frac;
47 MEAN_DECLARE(anticheat_speedhack, 5);
49 .float anticheat_speedhack_accu;
50 .float anticheat_speedhack_lasttime;
51 MEAN_DECLARE(anticheat_speedhack_m1, 1);
52 MEAN_DECLARE(anticheat_speedhack_m2, 2);
53 MEAN_DECLARE(anticheat_speedhack_m3, 3);
54 MEAN_DECLARE(anticheat_speedhack_m4, 4);
55 MEAN_DECLARE(anticheat_speedhack_m5, 5);
57 float movement_oddity(vector m0, vector m1)
59 float cosangle = normalize(m0) * normalize(m1);
62 return 0.5 - 0.5 * cos(cosangle * cosangle * 4 * M_PI);
63 // returns 0 for: -1, -sqrt(0.5), 0 (angles that commonly happen with kbd)
66 void anticheat_physics(entity this)
70 // div0_evade -> SPECTATORS
71 makevectors(this.v_angle);
72 if(CS(this).anticheat_div0_evade_offset == 0)
74 f = fabs(anticheat_div0_evade_evasion_delta - floor(anticheat_div0_evade_evasion_delta) - 0.5) * 2; // triangle function
75 CS(this).anticheat_div0_evade_offset = servertime + sys_frametime * (3 * f - 1);
76 CS(this).anticheat_div0_evade_v_angle = this.v_angle;
77 CS(this).anticheat_div0_evade_forward_initial = v_forward;
78 MEAN_ACCUMULATE(CS(this), anticheat_div0_evade, 0, 1);
82 if(time < CS(this).anticheat_div0_evade_offset)
83 CS(this).anticheat_div0_evade_v_angle = this.v_angle;
84 MEAN_ACCUMULATE(CS(this), anticheat_div0_evade, 0.5 - 0.5 * (CS(this).anticheat_div0_evade_forward_initial * v_forward), 1);
87 MEAN_ACCUMULATE(CS(this), anticheat_div0_strafebot_old, movement_oddity(CS(this).movement, CS(this).anticheat_div0_strafebot_movement_prev), 1);
88 CS(this).anticheat_div0_strafebot_movement_prev = CS(this).movement;
90 // Note: this actually tries to detect snap-aim.
91 if(CS(this).anticheat_div0_strafebot_forward_prev && time > CS(this).anticheat_fixangle_endtime) {
92 float cosangle = CS(this).anticheat_div0_strafebot_forward_prev * v_forward;
93 float angle = cosangle < -1 ? M_PI : cosangle > 1 ? 0 : acos(cosangle);
95 if (angle >= 10 * M_PI / 180)
96 printf("SNAP %s: %f for %f, %f since fixangle\n", this.netname, angle * 180 / M_PI, cosangle, time - CS(this).anticheat_fixangle_endtime);
98 MEAN_ACCUMULATE(CS(this), anticheat_div0_strafebot_new, angle / M_PI, 1);
100 if (autocvar_slowmo > 0) {
101 // Technically this is a NOP, as the engine should be ensuring
102 // this in the first place. Let's guard against dividing by
104 float dt = max(0.001, frametime) / autocvar_slowmo;
106 float anglespeed = angle / dt;
107 MEAN_ACCUMULATE(CS(this), anticheat_idle_snapaim_signal, anglespeed, dt);
108 MEAN_ACCUMULATE(CS(this), anticheat_idle_snapaim_noise, anglespeed, dt);
109 MEAN_ACCUMULATE(CS(this), anticheat_idle_snapaim_m2, anglespeed, dt);
110 MEAN_ACCUMULATE(CS(this), anticheat_idle_snapaim_m3, anglespeed, dt);
111 MEAN_ACCUMULATE(CS(this), anticheat_idle_snapaim_m4, anglespeed, dt);
112 MEAN_ACCUMULATE(CS(this), anticheat_idle_snapaim_m7, anglespeed, dt);
113 MEAN_ACCUMULATE(CS(this), anticheat_idle_snapaim_m10, anglespeed, dt);
116 CS(this).anticheat_div0_strafebot_forward_prev = v_forward;
118 // generic speedhack detection: correlate anticheat_speedhack_movetime (UPDATED BEFORE THIS) and server time
119 CS(this).anticheat_speedhack_movetime_frac += frametime;
120 f = floor(CS(this).anticheat_speedhack_movetime_frac);
121 CS(this).anticheat_speedhack_movetime_frac -= f;
122 CS(this).anticheat_speedhack_movetime_count += f;
123 CS(this).anticheat_speedhack_movetime = CS(this).anticheat_speedhack_movetime_frac + CS(this).anticheat_speedhack_movetime_count;
124 f = CS(this).anticheat_speedhack_movetime - servertime;
125 if(CS(this).anticheat_speedhack_offset == 0)
126 CS(this).anticheat_speedhack_offset = f;
129 MEAN_ACCUMULATE(CS(this), anticheat_speedhack, max(0, f - CS(this).anticheat_speedhack_offset), 1);
130 CS(this).anticheat_speedhack_offset += (f - CS(this).anticheat_speedhack_offset) * frametime * 0.1;
133 // new generic speedhack detection
134 if (CS(this).anticheat_speedhack_lasttime > 0) {
135 float dt = servertime - CS(this).anticheat_speedhack_lasttime;
136 const float falloff = 0.2;
137 CS(this).anticheat_speedhack_accu *= exp(-dt * falloff);
138 CS(this).anticheat_speedhack_accu += frametime * falloff;
139 // NOTE: at cl_netfps x, this actually averages not to 1, but to 1/x * falloff / (1 - exp(-1/x * falloff))
140 // For 15 netfps (absolute minimum bearable), and 0.2 falloff, this is: 1.0067
141 CS(this).anticheat_speedhack_lasttime = servertime;
142 MEAN_ACCUMULATE(CS(this), anticheat_speedhack_m1, CS(this).anticheat_speedhack_accu, frametime);
143 MEAN_ACCUMULATE(CS(this), anticheat_speedhack_m2, CS(this).anticheat_speedhack_accu, frametime);
144 MEAN_ACCUMULATE(CS(this), anticheat_speedhack_m3, CS(this).anticheat_speedhack_accu, frametime);
145 MEAN_ACCUMULATE(CS(this), anticheat_speedhack_m4, CS(this).anticheat_speedhack_accu, frametime);
146 MEAN_ACCUMULATE(CS(this), anticheat_speedhack_m5, CS(this).anticheat_speedhack_accu, frametime);
148 CS(this).anticheat_speedhack_accu = 1;
149 CS(this).anticheat_speedhack_lasttime = servertime;
153 void anticheat_spectatecopy(entity this, entity spectatee)
155 // div0_evade -> SPECTATORS
156 this.angles = CS(spectatee).anticheat_div0_evade_v_angle;
159 void anticheat_prethink(entity this)
161 // div0_evade -> SPECTATORS
162 CS(this).anticheat_div0_evade_offset = 0;
165 string anticheat_display(float f, float t, float tmin, float mi, float ma)
171 return strcat(s, ":N");
173 return strcat(s, ":Y");
175 return strcat(s, ":-");
178 #define ANTICHEATS(ANTICHEAT) \
179 ANTICHEAT("speedhack", MEAN_EVALUATE(CS(this), anticheat_speedhack), 240, 0, 9999); /* Actually this one seems broken. */ \
180 ANTICHEAT("speedhack_m1", MEAN_EVALUATE(CS(this), anticheat_speedhack_m1), 240, 1.01, 1.25); \
181 ANTICHEAT("speedhack_m2", MEAN_EVALUATE(CS(this), anticheat_speedhack_m2), 240, 1.01, 1.25); \
182 ANTICHEAT("speedhack_m3", MEAN_EVALUATE(CS(this), anticheat_speedhack_m3), 240, 1.01, 1.25); \
183 ANTICHEAT("speedhack_m4", MEAN_EVALUATE(CS(this), anticheat_speedhack_m4), 240, 1.01, 1.25); \
184 ANTICHEAT("speedhack_m5", MEAN_EVALUATE(CS(this), anticheat_speedhack_m5), 240, 1.01, 1.25); \
185 ANTICHEAT("div0_strafebot_old", MEAN_EVALUATE(CS(this), anticheat_div0_strafebot_old), 120, 0.15, 0.4); \
186 ANTICHEAT("div0_strafebot_new", MEAN_EVALUATE(CS(this), anticheat_div0_strafebot_new), 120, 0.25, 0.8); \
187 ANTICHEAT("div0_evade", MEAN_EVALUATE(CS(this), anticheat_div0_evade), 120, 0.2, 0.5); \
188 ANTICHEAT("idle_snapaim", MEAN_EVALUATE(CS(this), anticheat_idle_snapaim_signal) - MEAN_EVALUATE(CS(this), anticheat_idle_snapaim_noise), 120, 0, 9999); \
189 ANTICHEAT("idle_snapaim_signal", MEAN_EVALUATE(CS(this), anticheat_idle_snapaim_signal), 120, 0, 9999); \
190 ANTICHEAT("idle_snapaim_noise", MEAN_EVALUATE(CS(this), anticheat_idle_snapaim_noise), 120, 0, 9999); \
191 ANTICHEAT("idle_snapaim_m2", MEAN_EVALUATE(CS(this), anticheat_idle_snapaim_m2), 120, 0, 9999); \
192 ANTICHEAT("idle_snapaim_m3", MEAN_EVALUATE(CS(this), anticheat_idle_snapaim_m3), 120, 0, 9999); \
193 ANTICHEAT("idle_snapaim_m4", MEAN_EVALUATE(CS(this), anticheat_idle_snapaim_m4), 120, 0, 9999); \
194 ANTICHEAT("idle_snapaim_m7", MEAN_EVALUATE(CS(this), anticheat_idle_snapaim_m7), 120, 0, 9999); \
195 ANTICHEAT("idle_snapaim_m10", MEAN_EVALUATE(CS(this), anticheat_idle_snapaim_m10), 120, 0, 9999)
197 void anticheat_report_to_eventlog(entity this) {
198 if(!autocvar_sv_eventlog)
200 GameLogEcho(strcat(":anticheat:_time:", ftos(this.playerid), ":", ftos(servertime - CS(this).anticheat_jointime)));
201 #define ANTICHEAT_REPORT_ONE(name, f, tmin, mi, ma) \
202 GameLogEcho(strcat(":anticheat:", name, ":", anticheat_display(f, servertime - CS(this).anticheat_jointime, tmin, mi, ma)))
203 ANTICHEATS(ANTICHEAT_REPORT_ONE);
204 #undef ANTICHEAT_REPORT_ONE
207 void anticheat_report_to_playerstats(entity this) {
208 PlayerStats_GameReport_Event_Player(this,
209 strcat(PLAYERSTATS_ANTICHEAT, "_time"), servertime - CS(this).anticheat_jointime);
210 #define ANTICHEAT_REPORT_ONE(name, f, tmin, mi, ma) \
211 PlayerStats_GameReport_Event_Player(this, strcat(PLAYERSTATS_ANTICHEAT, name), f)
212 ANTICHEATS(ANTICHEAT_REPORT_ONE);
213 #undef ANTICHEAT_REPORT_ONE
216 void anticheat_register_to_playerstats() {
217 PlayerStats_GameReport_AddEvent(strcat(PLAYERSTATS_ANTICHEAT, "_time"));
218 #define ANTICHEAT_REGISTER_ONE(name, unused_f, unused_tmin, unused_mi, unused_ma) \
219 PlayerStats_GameReport_AddEvent(strcat(PLAYERSTATS_ANTICHEAT, name))
220 ANTICHEATS(ANTICHEAT_REGISTER_ONE);
221 #undef ANTICHEAT_REGISTER_ONE
226 void anticheat_startframe()
228 anticheat_div0_evade_evasion_delta += frametime * (0.5 + random());
231 void anticheat_fixangle(entity this)
233 CS(this).anticheat_fixangle_endtime = servertime + ANTILAG_LATENCY(this) + 0.2;
236 void anticheat_endframe()
238 FOREACH_CLIENT(it.fixangle, anticheat_fixangle(it));
239 anticheat_div0_evade_evasion_delta += frametime * (0.5 + random());
242 void anticheat_init(entity this)
244 CS(this).anticheat_speedhack_offset = 0;
245 CS(this).anticheat_jointime = servertime;