init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Tls/DtlsReplayWindow.cs

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+using System;
+
+namespace Org.BouncyCastle.Crypto.Tls;
+
+internal class DtlsReplayWindow
+{
+	private const long VALID_SEQ_MASK = 281474976710655L;
+
+	private const long WINDOW_SIZE = 64L;
+
+	private long mLatestConfirmedSeq = -1L;
+
+	private long mBitmap = 0L;
+
+	internal bool ShouldDiscard(long seq)
+	{
+		if ((seq & 0xFFFFFFFFFFFFL) != seq)
+		{
+			return true;
+		}
+		if (seq <= mLatestConfirmedSeq)
+		{
+			long num = mLatestConfirmedSeq - seq;
+			if (num >= 64)
+			{
+				return true;
+			}
+			if ((mBitmap & (1L << (int)num)) != 0)
+			{
+				return true;
+			}
+		}
+		return false;
+	}
+
+	internal void ReportAuthenticated(long seq)
+	{
+		if ((seq & 0xFFFFFFFFFFFFL) != seq)
+		{
+			throw new ArgumentException("out of range", "seq");
+		}
+		if (seq <= mLatestConfirmedSeq)
+		{
+			long num = mLatestConfirmedSeq - seq;
+			if (num < 64)
+			{
+				mBitmap |= 1L << (int)num;
+			}
+			return;
+		}
+		long num2 = seq - mLatestConfirmedSeq;
+		if (num2 >= 64)
+		{
+			mBitmap = 1L;
+		}
+		else
+		{
+			mBitmap <<= (int)num2;
+			mBitmap |= 1L;
+		}
+		mLatestConfirmedSeq = seq;
+	}
+
+	internal void Reset()
+	{
+		mLatestConfirmedSeq = -1L;
+		mBitmap = 0L;
+	}
+}