public MessageDecoderResult Decodable(IoSession session, IoBuffer input)
{
if (input.Remaining < MIN_PACKET_LENGTH)
return MessageDecoderResult.NeedData;
var symbol = input.GetArray(2);
if (DataPacket.True(symbol))
{
input.Skip(1);
var len = input.Get();
input.Rewind();
if (len > input.Remaining) return MessageDecoderResult.NeedData;
}
else if (!CtlPacket.True(symbol)) return MessageDecoderResult.NotOK;
return MessageDecoderResult.OK;
}