556 lines
24 KiB
C#
556 lines
24 KiB
C#
using SharedLibraryCore.Database.Models;
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using SharedLibraryCore.Helpers;
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using SharedLibraryCore.Interfaces;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text.RegularExpressions;
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using Data.Models;
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using Data.Models.Client;
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using Data.Models.Client.Stats;
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using Microsoft.Extensions.Logging;
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using SharedLibraryCore;
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using ILogger = Microsoft.Extensions.Logging.ILogger;
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namespace IW4MAdmin.Plugins.Stats.Cheat
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{
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public class Detection
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{
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public enum DetectionType
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{
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Bone,
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Chest,
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Offset,
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Strain,
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Recoil,
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Snap,
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Button
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};
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public ChangeTracking<EFACSnapshot> Tracker { get; private set; }
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public const int MIN_HITS_TO_RUN_DETECTION = 5;
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private const int MIN_ANGLE_COUNT = 5;
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public List<EFClientKill> TrackedHits { get; set; }
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int Kills;
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int HitCount;
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Dictionary<IW4Info.HitLocation, HitInfo> HitLocationCount;
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double AngleDifferenceAverage;
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EFClientStatistics ClientStats;
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long LastOffset;
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string LastWeapon;
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ILogger Log;
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Strain Strain;
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readonly DateTime ConnectionTime = DateTime.UtcNow;
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private double mapAverageRecoilAmount;
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private double sessionAverageSnapAmount;
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private int sessionSnapHits;
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private EFClientKill lastHit;
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private int validRecoilHitCount;
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private int validButtonHitCount;
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private class HitInfo
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{
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public int Count { get; set; }
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public double Offset { get; set; }
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};
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public Detection(ILogger log, EFClientStatistics clientStats)
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{
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Log = log;
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HitLocationCount = new Dictionary<IW4Info.HitLocation, HitInfo>();
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foreach (var loc in Enum.GetValues(typeof(IW4Info.HitLocation)))
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{
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HitLocationCount.Add((IW4Info.HitLocation)loc, new HitInfo());
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}
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ClientStats = clientStats;
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Strain = new Strain();
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Tracker = new ChangeTracking<EFACSnapshot>();
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TrackedHits = new List<EFClientKill>();
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}
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private static double SnapDistance(Vector3 a, Vector3 b, Vector3 c)
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{
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a = a.FixIW4Angles();
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b = b.FixIW4Angles();
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c = c.FixIW4Angles();
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float preserveDirectionAngle(float a1, float b1)
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{
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float difference = b1 - a1;
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while (difference < -180) difference += 360;
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while (difference > 180) difference -= 360;
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return difference;
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}
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var directions = new[]
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{
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new Vector3(preserveDirectionAngle(b.X, a.X),preserveDirectionAngle(b.Y, a.Y), 0),
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new Vector3( preserveDirectionAngle(c.X, b.X), preserveDirectionAngle(c.Y, b.Y), 0)
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};
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var distance = new Vector3(Math.Abs(directions[1].X - directions[0].X),
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Math.Abs(directions[1].Y - directions[0].Y), 0);
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return Math.Sqrt((distance.X * distance.X) + (distance.Y * distance.Y));
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}
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/// <summary>
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/// Analyze kill and see if performed by a cheater
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/// </summary>
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/// <param name="hit">kill performed by the player</param>
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/// <returns>true if detection reached thresholds, false otherwise</returns>
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public IEnumerable<DetectionPenaltyResult> ProcessHit(EFClientKill hit)
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{
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var results = new List<DetectionPenaltyResult>();
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if ((hit.DeathType != (int)IW4Info.MeansOfDeath.MOD_PISTOL_BULLET &&
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hit.DeathType != (int)IW4Info.MeansOfDeath.MOD_RIFLE_BULLET &&
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hit.DeathType != (int)IW4Info.MeansOfDeath.MOD_HEAD_SHOT) ||
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hit.HitLoc == (int)IW4Info.HitLocation.none || hit.TimeOffset - LastOffset < 0 ||
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// hack: prevents false positives
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(LastWeapon != hit.WeaponReference && (hit.TimeOffset - LastOffset) == 50))
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{
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return new[] {new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Any,
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}};
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}
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LastWeapon = hit.WeaponReference;
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HitLocationCount[(IW4Info.HitLocation)hit.HitLoc].Count++;
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HitCount++;
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if (hit.IsKill)
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{
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Kills++;
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}
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#region SNAP
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if (hit.AnglesList.Count == MIN_ANGLE_COUNT)
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{
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if (lastHit == null)
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{
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lastHit = hit;
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}
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bool areAnglesInvalid = hit.AnglesList[0].Equals(hit.AnglesList[1]) && hit.AnglesList[3].Equals(hit.AnglesList[4]);
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if ((lastHit == hit ||
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lastHit.VictimId != hit.VictimId ||
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(hit.TimeOffset - lastHit.TimeOffset) >= 1000) &&
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!areAnglesInvalid)
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{
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ClientStats.SnapHitCount++;
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sessionSnapHits++;
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var currentSnapDistance = SnapDistance(hit.AnglesList[0], hit.AnglesList[1], hit.ViewAngles);
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double previousAverage = ClientStats.AverageSnapValue;
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ClientStats.AverageSnapValue = (previousAverage * (ClientStats.SnapHitCount - 1) + currentSnapDistance) / ClientStats.SnapHitCount;
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double previousSessionAverage = sessionAverageSnapAmount;
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sessionAverageSnapAmount = (previousSessionAverage * (sessionSnapHits - 1) + currentSnapDistance) / sessionSnapHits;
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lastHit = hit;
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//var marginOfError = Thresholds.GetMarginOfError(sessionSnapHits);
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//var marginOfErrorLifetime = Thresholds.GetMarginOfError(ClientStats.SnapHitCount);
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if (sessionSnapHits >= Thresholds.MediumSampleMinKills &&
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sessionAverageSnapAmount >= Thresholds.SnapFlagValue/* + marginOfError*/)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Flag,
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Value = sessionAverageSnapAmount,
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HitCount = sessionSnapHits,
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Type = DetectionType.Snap
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});
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}
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if (sessionSnapHits >= Thresholds.MediumSampleMinKills &&
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sessionAverageSnapAmount >= Thresholds.SnapBanValue/* + marginOfError*/)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Ban,
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Value = sessionAverageSnapAmount,
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HitCount = sessionSnapHits,
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Type = DetectionType.Snap
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});
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}
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// lifetime
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if (ClientStats.SnapHitCount >= Thresholds.MediumSampleMinKills * 2 &&
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ClientStats.AverageSnapValue >= Thresholds.SnapFlagValue/* + marginOfErrorLifetime*/)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Flag,
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Value = sessionAverageSnapAmount,
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HitCount = ClientStats.SnapHitCount,
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Type = DetectionType.Snap
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});
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}
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if (ClientStats.SnapHitCount >= Thresholds.MediumSampleMinKills * 2 &&
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ClientStats.AverageSnapValue >= Thresholds.SnapBanValue/* + marginOfErrorLifetime*/)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Ban,
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Value = sessionAverageSnapAmount,
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HitCount = ClientStats.SnapHitCount,
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Type = DetectionType.Snap
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});
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}
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}
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}
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#endregion
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#region VIEWANGLES
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int totalUsableAngleCount = hit.AnglesList.Count - 1;
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int angleOffsetIndex = totalUsableAngleCount / 2;
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if (hit.AnglesList.Count == 5)
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{
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double realAgainstPredict = Vector3.ViewAngleDistance(hit.AnglesList[angleOffsetIndex - 1], hit.AnglesList[angleOffsetIndex + 1], hit.ViewAngles);
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// LIFETIME
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var hitLoc = ClientStats.HitLocations
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.First(hl => hl.Location == hit.HitLoc);
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float previousAverage = hitLoc.HitOffsetAverage;
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double newAverage = (previousAverage * (hitLoc.HitCount - 1) + realAgainstPredict) / hitLoc.HitCount;
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hitLoc.HitOffsetAverage = (float)newAverage;
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int totalHits = ClientStats.HitLocations.Sum(_hit => _hit.HitCount);
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var weightedLifetimeAverage = ClientStats.HitLocations.Where(_hit => _hit.HitCount > 0)
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.Sum(_hit => _hit.HitOffsetAverage * _hit.HitCount) / totalHits;
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if (weightedLifetimeAverage > Thresholds.MaxOffset(totalHits) &&
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hitLoc.HitCount > 100)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Ban,
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Value = hitLoc.HitOffsetAverage,
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HitCount = hitLoc.HitCount,
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Type = DetectionType.Offset
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});
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}
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// SESSION
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var sessionHitLoc = HitLocationCount[(IW4Info.HitLocation)hit.HitLoc];
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sessionHitLoc.Offset = (sessionHitLoc.Offset * (sessionHitLoc.Count - 1) + realAgainstPredict) / sessionHitLoc.Count;
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int totalSessionHits = HitLocationCount.Sum(_hit => _hit.Value.Count);
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var weightedSessionAverage = HitLocationCount.Where(_hit => _hit.Value.Count > 0)
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.Sum(_hit => _hit.Value.Offset * _hit.Value.Count) / totalSessionHits;
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AngleDifferenceAverage = weightedSessionAverage;
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if (weightedSessionAverage > Thresholds.MaxOffset(totalSessionHits) &&
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totalSessionHits >= (Thresholds.MediumSampleMinKills * 2))
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Ban,
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Value = weightedSessionAverage,
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HitCount = HitCount,
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Type = DetectionType.Offset,
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Location = (IW4Info.HitLocation)hitLoc.Location
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});
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}
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Log.LogDebug("PredictVsReal={realAgainstPredict}", realAgainstPredict);
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}
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#endregion
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#region STRAIN
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double currentStrain = Strain.GetStrain(hit.Distance / 0.0254, hit.ViewAngles, Math.Max(50, LastOffset == 0 ? 50 : (hit.TimeOffset - LastOffset)));
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Log.LogDebug("Current Strain: {currentStrain}", currentStrain);
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LastOffset = hit.TimeOffset;
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if (currentStrain > ClientStats.MaxStrain)
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{
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ClientStats.MaxStrain = currentStrain;
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}
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// flag
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if (currentStrain > Thresholds.MaxStrainFlag)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Flag,
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Value = currentStrain,
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HitCount = HitCount,
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Type = DetectionType.Strain
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});
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}
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// ban
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if (currentStrain > Thresholds.MaxStrainBan &&
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HitCount >= 5)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Ban,
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Value = currentStrain,
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HitCount = HitCount,
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Type = DetectionType.Strain
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});
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}
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#endregion
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#region RECOIL
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float hitRecoilAverage = 0;
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bool shouldIgnoreDetection = false;
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try
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{
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shouldIgnoreDetection = Plugin.Config.Configuration().AnticheatConfiguration.IgnoredDetectionSpecification[(Server.Game)hit.GameName][DetectionType.Recoil]
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.Any(_weaponRegex => Regex.IsMatch(hit.WeaponReference, _weaponRegex));
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}
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catch (KeyNotFoundException)
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{
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}
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if (!shouldIgnoreDetection)
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{
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validRecoilHitCount++;
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hitRecoilAverage = (hit.AnglesList.Sum(_angle => _angle.Z) + hit.ViewAngles.Z) / (hit.AnglesList.Count + 1);
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mapAverageRecoilAmount = (mapAverageRecoilAmount * (validRecoilHitCount - 1) + hitRecoilAverage) / validRecoilHitCount;
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if (validRecoilHitCount >= Thresholds.LowSampleMinKills && Kills > Thresholds.LowSampleMinKillsRecoil && mapAverageRecoilAmount == 0)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Ban,
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Value = mapAverageRecoilAmount,
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HitCount = HitCount,
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Type = DetectionType.Recoil
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});
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}
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}
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#endregion
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#region BUTTON
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try
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{
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shouldIgnoreDetection = false;
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shouldIgnoreDetection = Plugin.Config.Configuration().AnticheatConfiguration.IgnoredDetectionSpecification[(Server.Game)hit.GameName][DetectionType.Button]
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.Any(_weaponRegex => Regex.IsMatch(hit.WeaponReference, _weaponRegex));
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}
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catch (KeyNotFoundException)
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{
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}
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if (!shouldIgnoreDetection)
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{
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validButtonHitCount++;
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double lastDiff = hit.TimeOffset - hit.TimeSinceLastAttack;
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if (validButtonHitCount > 0 && lastDiff <= 0)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Ban,
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Value = lastDiff,
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HitCount = HitCount,
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Type = DetectionType.Button
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});
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}
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}
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#endregion
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#region SESSION_RATIOS
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if (Kills >= Thresholds.LowSampleMinKills)
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{
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double marginOfError = Thresholds.GetMarginOfError(HitCount);
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// determine what the max headshot percentage can be for current number of kills
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double lerpAmount = Math.Min(1.0, (HitCount - Thresholds.LowSampleMinKills) / (double)(/*Thresholds.HighSampleMinKills*/ 60 - Thresholds.LowSampleMinKills));
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double maxHeadshotLerpValueForFlag = Thresholds.Lerp(Thresholds.HeadshotRatioThresholdLowSample(2.0), Thresholds.HeadshotRatioThresholdHighSample(2.0), lerpAmount) + marginOfError;
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double maxHeadshotLerpValueForBan = Thresholds.Lerp(Thresholds.HeadshotRatioThresholdLowSample(3.5), Thresholds.HeadshotRatioThresholdHighSample(3.5), lerpAmount) + marginOfError;
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// determine what the max bone percentage can be for current number of kills
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double maxBoneRatioLerpValueForFlag = Thresholds.Lerp(Thresholds.BoneRatioThresholdLowSample(2.25), Thresholds.BoneRatioThresholdHighSample(2.25), lerpAmount) + marginOfError;
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double maxBoneRatioLerpValueForBan = Thresholds.Lerp(Thresholds.BoneRatioThresholdLowSample(3.25), Thresholds.BoneRatioThresholdHighSample(3.25), lerpAmount) + marginOfError;
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// calculate headshot ratio
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double currentHeadshotRatio = ((HitLocationCount[IW4Info.HitLocation.head].Count + HitLocationCount[IW4Info.HitLocation.helmet].Count + HitLocationCount[IW4Info.HitLocation.neck].Count) / (double)HitCount);
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// calculate maximum bone
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double currentMaxBoneRatio = (HitLocationCount.Values.Select(v => v.Count / (double)HitCount).Max());
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var bone = HitLocationCount.FirstOrDefault(b => b.Value.Count == HitLocationCount.Values.Max(_hit => _hit.Count)).Key;
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#region HEADSHOT_RATIO
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// flag on headshot
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if (currentHeadshotRatio > maxHeadshotLerpValueForFlag)
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{
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// ban on headshot
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if (currentHeadshotRatio > maxHeadshotLerpValueForBan)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Ban,
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Value = currentHeadshotRatio,
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Location = IW4Info.HitLocation.head,
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HitCount = HitCount,
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Type = DetectionType.Bone
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});
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}
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else
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Flag,
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Value = currentHeadshotRatio,
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Location = IW4Info.HitLocation.head,
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HitCount = HitCount,
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Type = DetectionType.Bone
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});
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}
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}
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#endregion
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#region BONE_RATIO
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// flag on bone ratio
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else if (currentMaxBoneRatio > maxBoneRatioLerpValueForFlag)
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{
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// ban on bone ratio
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if (currentMaxBoneRatio > maxBoneRatioLerpValueForBan)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Ban,
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Value = currentMaxBoneRatio,
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Location = bone,
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HitCount = HitCount,
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Type = DetectionType.Bone
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});
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}
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else
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Flag,
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Value = currentMaxBoneRatio,
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Location = bone,
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HitCount = HitCount,
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Type = DetectionType.Bone
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});
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}
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}
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#endregion
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}
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#region CHEST_ABDOMEN_RATIO_SESSION
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int chestHits = HitLocationCount[IW4Info.HitLocation.torso_upper].Count;
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try
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{
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shouldIgnoreDetection = false; // reset previous value
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shouldIgnoreDetection = Plugin.Config.Configuration().AnticheatConfiguration.IgnoredDetectionSpecification[(Server.Game)hit.GameName][DetectionType.Chest]
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.Any(_weaponRegex => Regex.IsMatch(hit.WeaponReference, _weaponRegex));
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}
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catch (KeyNotFoundException)
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{
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}
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if (chestHits >= Thresholds.MediumSampleMinKills && !shouldIgnoreDetection)
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{
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double marginOfError = Thresholds.GetMarginOfError(chestHits);
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double lerpAmount = Math.Min(1.0, (chestHits - Thresholds.MediumSampleMinKills) / (double)(Thresholds.HighSampleMinKills - Thresholds.LowSampleMinKills));
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// determine max acceptable ratio of chest to abdomen kills
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double chestAbdomenRatioLerpValueForFlag = Thresholds.Lerp(Thresholds.ChestAbdomenRatioThresholdLowSample(3), Thresholds.ChestAbdomenRatioThresholdHighSample(3), lerpAmount) + marginOfError;
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double chestAbdomenLerpValueForBan = Thresholds.Lerp(Thresholds.ChestAbdomenRatioThresholdLowSample(4), Thresholds.ChestAbdomenRatioThresholdHighSample(4), lerpAmount) + marginOfError;
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double currentChestAbdomenRatio = HitLocationCount[IW4Info.HitLocation.torso_upper].Count / (double)HitLocationCount[IW4Info.HitLocation.torso_lower].Count;
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if (currentChestAbdomenRatio > chestAbdomenRatioLerpValueForFlag)
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{
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if (currentChestAbdomenRatio > chestAbdomenLerpValueForBan && chestHits >= Thresholds.MediumSampleMinKills * 2)
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Ban,
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Value = currentChestAbdomenRatio,
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Location = IW4Info.HitLocation.torso_upper,
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Type = DetectionType.Chest,
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HitCount = chestHits
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});
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}
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else
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{
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results.Add(new DetectionPenaltyResult()
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{
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ClientPenalty = EFPenalty.PenaltyType.Flag,
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Value = currentChestAbdomenRatio,
|
|
Location = IW4Info.HitLocation.torso_upper,
|
|
Type = DetectionType.Chest,
|
|
HitCount = chestHits
|
|
});
|
|
}
|
|
}
|
|
}
|
|
#endregion
|
|
#endregion
|
|
|
|
var snapshot = new EFACSnapshot()
|
|
{
|
|
When = hit.When,
|
|
ClientId = ClientStats.ClientId,
|
|
ServerId = ClientStats.ServerId,
|
|
SessionAngleOffset = AngleDifferenceAverage,
|
|
RecoilOffset = hitRecoilAverage,
|
|
CurrentSessionLength = (int)(DateTime.UtcNow - ConnectionTime).TotalMinutes,
|
|
CurrentStrain = currentStrain,
|
|
CurrentViewAngle = new Vector3(hit.ViewAngles.X, hit.ViewAngles.Y, hit.ViewAngles.Z),
|
|
Hits = HitCount,
|
|
Kills = Kills,
|
|
Deaths = ClientStats.SessionDeaths,
|
|
//todo[9.1.19]: why does this cause unique failure?
|
|
HitDestination = new Vector3(hit.DeathOrigin.X, hit.DeathOrigin.Y, hit.DeathOrigin.Z),
|
|
HitOrigin = new Vector3(hit.KillOrigin.X, hit.KillOrigin.Y, hit.KillOrigin.Z),
|
|
EloRating = ClientStats.EloRating,
|
|
HitLocation = hit.HitLoc,
|
|
LastStrainAngle = new Vector3(Strain.LastAngle.X, Strain.LastAngle.Y, Strain.LastAngle.Z),
|
|
// this is in "meters"
|
|
Distance = hit.Distance,
|
|
SessionScore = ClientStats.SessionScore,
|
|
HitType = hit.DeathType,
|
|
SessionSPM = Math.Round(ClientStats.SessionSPM, 0),
|
|
StrainAngleBetween = Strain.LastDistance,
|
|
TimeSinceLastEvent = (int)Strain.LastDeltaTime,
|
|
WeaponReference = hit.WeaponReference,
|
|
SessionSnapHits = sessionSnapHits,
|
|
SessionAverageSnapValue = sessionAverageSnapAmount
|
|
};
|
|
|
|
snapshot.PredictedViewAngles = hit.AnglesList
|
|
.Select(_angle => new EFACSnapshotVector3()
|
|
{
|
|
Vector = _angle,
|
|
Snapshot = snapshot
|
|
})
|
|
.ToList();
|
|
|
|
Tracker.OnChange(snapshot);
|
|
|
|
return results;
|
|
}
|
|
|
|
public void OnMapChange()
|
|
{
|
|
mapAverageRecoilAmount = 0;
|
|
validRecoilHitCount = 0;
|
|
}
|
|
}
|
|
}
|