System.IO.BACnet.BacnetPtpProtocolTransport.ProcessRxStatus C# (CSharp) Méthode

        private BacnetMstpProtocolTransport.GetMessageStatus ProcessRxStatus(byte[] buffer, ref int offset, int rx)
        {
            if (rx == -BacnetMstpProtocolTransport.ETIMEDOUT)
            {
                //drop message
                BacnetMstpProtocolTransport.GetMessageStatus status = offset == 0 ? BacnetMstpProtocolTransport.GetMessageStatus.Timeout : BacnetMstpProtocolTransport.GetMessageStatus.SubTimeout;
                buffer[0] = 0xFF;
                RemoveGarbage(buffer, ref offset);
                return status;
            }
            else if (rx < 0)
            {
                //drop message
                buffer[0] = 0xFF;
                RemoveGarbage(buffer, ref offset);
                return BacnetMstpProtocolTransport.GetMessageStatus.ConnectionError;
            }
            else if (rx == 0)
            {
                //drop message
                buffer[0] = 0xFF;
                RemoveGarbage(buffer, ref offset);
                return BacnetMstpProtocolTransport.GetMessageStatus.ConnectionClose;
            }
            return BacnetMstpProtocolTransport.GetMessageStatus.Good;
        }