private void HandleHandshake()
{
char[] protocolIdentifier = _reader.ReadChars(_reader.ReadByte());
Debug($"Remote Protocol: {new string(protocolIdentifier)}");
if (!ProtocolIdentifier.SequenceEqual(protocolIdentifier))
{
Debug("Invalid remote protocol");
Disconnect();
return;
}
byte[] extensionBytes = _reader.ReadBytes(8);
if (!extensionBytes.SequenceEqual(new byte[8]))
{
Debug("Remote client has extensions");
}
byte[] torrentHash = _reader.ReadBytes(20);
Debug($"Remote Torrent Hash: {Encoding.UTF8.GetString(torrentHash)}");
if (_initiator)
{
if (!_torrent.InfoHashBytes.SequenceEqual(torrentHash))
{
Debug("Invalid remote torrent hash");
Disconnect();
return;
}
}
else
{
// TODO: Check we have this torrent
throw new NotImplementedException("Unable to handle incoming requests");
}
if (!_initiator)
{
SendHandshake();
}
string id = Encoding.UTF8.GetString(_reader.ReadBytes(20));
Debug($"Peer Id: {id}");
// TODO: Check for banned peers
PeerId = id;
if (_initiator)
{
_writer.Write(_client.PeerId.ToCharArray());
}
}
public static string Parse(this BeBinaryReader br, out string b, int maxLength)
{
b = new string(br.ReadChars(maxLength)).Replace("\0", "");
return(b);
}