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update anti-cheat offset calculation

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This commit is contained in:
RaidMax 2019-06-12 10:27:15 -05:00
parent e86904b11e
commit 10829b32ad
3 changed files with 48 additions and 26 deletions
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60
Plugins/Stats/Cheat/Detection.cs
View File

@ -25,7 +25,7 @@ namespace IW4MAdmin.Plugins.Stats.Cheat
public List<EFClientKill> QueuedHits { get; set; }
int Kills;
int HitCount;
Dictionary<IW4Info.HitLocation, int> HitLocationCount;
Dictionary<IW4Info.HitLocation, HitInfo> HitLocationCount;
double AngleDifferenceAverage;
EFClientStatistics ClientStats;
long LastOffset;
@ -34,13 +34,19 @@ namespace IW4MAdmin.Plugins.Stats.Cheat
Strain Strain;
readonly DateTime ConnectionTime = DateTime.UtcNow;
private class HitInfo
{
public int Count { get; set; }
public double Offset { get; set; }
};
public Detection(ILogger log, EFClientStatistics clientStats)
{
Log = log;
HitLocationCount = new Dictionary<IW4Info.HitLocation, int>();
HitLocationCount = new Dictionary<IW4Info.HitLocation, HitInfo>();
foreach (var loc in Enum.GetValues(typeof(IW4Info.HitLocation)))
{
HitLocationCount.Add((IW4Info.HitLocation)loc, 0);
HitLocationCount.Add((IW4Info.HitLocation)loc, new HitInfo());
}
ClientStats = clientStats;
@ -72,7 +78,7 @@ namespace IW4MAdmin.Plugins.Stats.Cheat
DetectionPenaltyResult result = null;
LastWeapon = hit.Weapon;
HitLocationCount[hit.HitLoc]++;
HitLocationCount[hit.HitLoc].Count++;
HitCount++;
if (!isDamage)
@ -93,14 +99,18 @@ namespace IW4MAdmin.Plugins.Stats.Cheat
double newAverage = (previousAverage * (hitLoc.HitCount - 1) + realAgainstPredict) / hitLoc.HitCount;
hitLoc.HitOffsetAverage = (float)newAverage;
if (hitLoc.HitOffsetAverage > Thresholds.MaxOffset(hitLoc.HitCount) &&
int totalHits = ClientStats.HitLocations.Sum(_hit => _hit.HitCount);
var weightedLifetimeAverage = ClientStats.HitLocations.Where(_hit => _hit.HitCount > 0)
.Sum(_hit => _hit.HitOffsetAverage * _hit.HitCount) / totalHits;
if (weightedLifetimeAverage > Thresholds.MaxOffset(totalHits) &&
hitLoc.HitCount > 100)
{
//Log.WriteDebug("*** Reached Max Lifetime Average for Angle Difference ***");
//Log.WriteDebug($"Lifetime Average = {newAverage}");
//Log.WriteDebug($"Bone = {hitLoc.Location}");
//Log.WriteDebug($"HitCount = {hitLoc.HitCount}");
//Log.WriteDebug($"ID = {hit.AttackerId}");
Log.WriteDebug("*** Reached Max Lifetime Average for Angle Difference ***");
Log.WriteDebug($"Lifetime Average = {newAverage}");
Log.WriteDebug($"Bone = {hitLoc.Location}");
Log.WriteDebug($"HitCount = {hitLoc.HitCount}");
Log.WriteDebug($"ID = {hit.AttackerId}");
result = new DetectionPenaltyResult()
{
@ -112,21 +122,25 @@ namespace IW4MAdmin.Plugins.Stats.Cheat
}
// SESSION
double sessAverage = (AngleDifferenceAverage * (HitCount - 1) + realAgainstPredict) / HitCount;
AngleDifferenceAverage = sessAverage;
var sessionHitLoc = HitLocationCount[hit.HitLoc];
sessionHitLoc.Offset = (sessionHitLoc.Offset * (sessionHitLoc.Count - 1) + realAgainstPredict) / sessionHitLoc.Count;
if (sessAverage > Thresholds.MaxOffset(HitCount) &&
HitCount > 30)
int totalSessionHits = HitLocationCount.Sum(_hit => _hit.Value.Count);
var weightedSessionAverage = HitLocationCount.Where(_hit => _hit.Value.Count > 0)
.Sum(_hit => _hit.Value.Offset * _hit.Value.Count) / totalHits;
if (weightedSessionAverage > Thresholds.MaxOffset(totalSessionHits) &&
totalSessionHits > 40)
{
//Log.WriteDebug("*** Reached Max Session Average for Angle Difference ***");
//Log.WriteDebug($"Session Average = {sessAverage}");
//Log.WriteDebug($"HitCount = {HitCount}");
//Log.WriteDebug($"ID = {hit.AttackerId}");
Log.WriteDebug("*** Reached Max Session Average for Angle Difference ***");
Log.WriteDebug($"Session Average = {weightedSessionAverage}");
Log.WriteDebug($"HitCount = {HitCount}");
Log.WriteDebug($"ID = {hit.AttackerId}");
result = new DetectionPenaltyResult()
{
ClientPenalty = EFPenalty.PenaltyType.Ban,
Value = sessAverage,
Value = weightedSessionAverage,
HitCount = HitCount,
Type = DetectionType.Offset,
Location = hitLoc.Location
@ -188,10 +202,10 @@ namespace IW4MAdmin.Plugins.Stats.Cheat
double maxBoneRatioLerpValueForBan = Thresholds.Lerp(Thresholds.BoneRatioThresholdLowSample(3.25), Thresholds.BoneRatioThresholdHighSample(3.25), lerpAmount) + marginOfError;
// calculate headshot ratio
double currentHeadshotRatio = ((HitLocationCount[IW4Info.HitLocation.head] + HitLocationCount[IW4Info.HitLocation.helmet] + HitLocationCount[IW4Info.HitLocation.neck]) / (double)HitCount);
double currentHeadshotRatio = ((HitLocationCount[IW4Info.HitLocation.head].Count + HitLocationCount[IW4Info.HitLocation.helmet].Count + HitLocationCount[IW4Info.HitLocation.neck].Count) / (double)HitCount);
// calculate maximum bone
double currentMaxBoneRatio = (HitLocationCount.Values.Select(v => v / (double)HitCount).Max());
double currentMaxBoneRatio = (HitLocationCount.Values.Select(v => v.Count / (double)HitCount).Max());
var bone = HitLocationCount.FirstOrDefault(b => b.Value == HitLocationCount.Values.Max()).Key;
#region HEADSHOT_RATIO
@ -308,7 +322,7 @@ namespace IW4MAdmin.Plugins.Stats.Cheat
}
#region CHEST_ABDOMEN_RATIO_SESSION
int chestHits = HitLocationCount[IW4Info.HitLocation.torso_upper];
int chestHits = HitLocationCount[IW4Info.HitLocation.torso_upper].Count;
if (chestHits >= Thresholds.MediumSampleMinKills)
{
@ -318,7 +332,7 @@ namespace IW4MAdmin.Plugins.Stats.Cheat
double chestAbdomenRatioLerpValueForFlag = Thresholds.Lerp(Thresholds.ChestAbdomenRatioThresholdLowSample(3), Thresholds.ChestAbdomenRatioThresholdHighSample(3), lerpAmount) + marginOfError;
double chestAbdomenLerpValueForBan = Thresholds.Lerp(Thresholds.ChestAbdomenRatioThresholdLowSample(4), Thresholds.ChestAbdomenRatioThresholdHighSample(4), lerpAmount) + marginOfError;
double currentChestAbdomenRatio = HitLocationCount[IW4Info.HitLocation.torso_upper] / (double)HitLocationCount[IW4Info.HitLocation.torso_lower];
double currentChestAbdomenRatio = HitLocationCount[IW4Info.HitLocation.torso_upper].Count / (double)HitLocationCount[IW4Info.HitLocation.torso_lower].Count;
if (currentChestAbdomenRatio > chestAbdomenRatioLerpValueForFlag)
{

5
Plugins/Stats/Cheat/Thresholds.cs
View File

@ -29,7 +29,10 @@ namespace IW4MAdmin.Plugins.Stats.Cheat
public const double MaxStrainBan = 0.9;
public static double MaxOffset(int sampleSize) => Math.Exp(Math.Max(-3.07 + (-3.07 / Math.Sqrt(sampleSize)), -3.07 - (-3.07 / Math.Sqrt(sampleSize))) + 4 * (0.869));
private const double _offsetMeanLog = -2.727273;
private const double _offsetSdLog = 0.458325;
public static double MaxOffset(int sampleSize) => Math.Exp(Math.Max(_offsetMeanLog + (_offsetMeanLog / Math.Sqrt(sampleSize)), _offsetMeanLog - (_offsetMeanLog / Math.Sqrt(sampleSize))) + 4 * (_offsetSdLog));
public const double MaxStrainFlag = 0.36;
public static double GetMarginOfError(int numKills) => 1.6455 / Math.Sqrt(numKills);

9
SharedLibraryCore/Services/ClientService.cs
View File

@ -360,7 +360,7 @@ namespace SharedLibraryCore.Services
{
using (var context = new DatabaseContext())
{
if (temporalClient.LastConnection == DateTime.MinValue || temporalClient.Connections == 0 || temporalClient.TotalConnectionTime == 0)
if (temporalClient.LastConnection == DateTime.MinValue || temporalClient.FirstConnection == DateTime.MinValue)
{
throw new InvalidOperationException($"client {temporalClient} trying to update but parameters are invalid");
}
@ -369,6 +369,12 @@ namespace SharedLibraryCore.Services
var entity = context.Clients
.First(client => client.ClientId == temporalClient.ClientId);
if (entity.TotalConnectionTime > temporalClient.TotalConnectionTime || entity.Connections > temporalClient.Connections ||
entity.LastConnection > temporalClient.LastConnection || entity.FirstConnection > temporalClient.FirstConnection)
{
throw new InvalidOperationException($"client {temporalClient} trying to update but new parameters don't match saved parameters");
}
entity.LastConnection = temporalClient.LastConnection;
entity.Connections = temporalClient.Connections;
entity.FirstConnection = temporalClient.FirstConnection;
@ -462,7 +468,6 @@ namespace SharedLibraryCore.Services
}
// want to find them by name (wildcard)
// todo maybe not make it start with wildcard?
else
{
iqLinkIds = iqLinkIds.Where(_alias => EF.Functions.Like(_alias.Name.ToLower(), $"%{identifier.ToLower()}%"));