private bool ParseBitfield(PeerEventData peerEventData)
{
var byteBitsList = peerEventData.Payload.Select(b => new BitArray(new byte[] { b }));
if (byteBitsList.Count() * 8 < PieceAmount - 1)
{
return(false);
}
long pieceIndex = 0;
foreach (var byteBits in byteBitsList)
{
for (int byteIndex = 7; byteIndex >= 0; byteIndex--)
{
if (pieceIndex >= PieceAmount && byteBits[byteIndex]) //Extra bits must be 0
{
return(false);
}
if (byteBits[byteIndex])
{
PieceIndexes.Add(pieceIndex);
}
pieceIndex++;
}
}
return(true);
}
public long?RetrievePieceIndexIfAny(List <long> neededPieces)
{
if (!neededPieces.Any())
{
return(null);
}
if (!PieceIndexes.Any())
{
return(null);
}
var intersection = PieceIndexes.Intersect(neededPieces).ToList();
if (!intersection.Any())
{
return(null);
}
return(intersection.First());
}
