private void SendFrame(MessageFrame frame)
{
if (SourceAddress == -1 || _port == null)
{
return;
}
int tx;
if (frame.Data == null || frame.Data.Length == 0)
{
var tmpTransmitBuffer = new byte[MSTP.MSTP_HEADER_LENGTH];
tx = MSTP.Encode(tmpTransmitBuffer, 0, frame.FrameType, frame.DestinationAddress,
(byte)SourceAddress, 0);
_port.Write(tmpTransmitBuffer, 0, tx);
}
else
{
tx = MSTP.Encode(frame.Data, 0, frame.FrameType, frame.DestinationAddress, (byte)SourceAddress,
frame.DataLength);
_port.Write(frame.Data, 0, tx);
}
frame.SendMutex.Set();
//debug
if (StateLogging)
{
Trace.WriteLine($" {frame.FrameType} {frame.DestinationAddress.ToString("X2")} ");
}
}
private void SendFrame(MessageFrame frame)
{
if (m_TS == -1 || m_port == null)
{
return;
}
int tx;
if (frame.data == null || frame.data.Length == 0)
{
byte[] tmp_transmit_buffer = new byte[MSTP.MSTP_HEADER_LENGTH];
tx = MSTP.Encode(tmp_transmit_buffer, 0, frame.frame_type, frame.destination_address, (byte)m_TS, 0);
m_port.Write(tmp_transmit_buffer, 0, tx);
}
else
{
tx = MSTP.Encode(frame.data, 0, frame.frame_type, frame.destination_address, (byte)m_TS, frame.data_length);
m_port.Write(frame.data, 0, tx);
}
frame.send_mutex.Set();
//debug
if (StateLogging)
{
Trace.WriteLine(" " + frame.frame_type + " " + frame.destination_address.ToString("X2") + " ");
}
}
public static int Decode(byte[] buffer, int offset, int maxLength, out BacnetPtpFrameTypes frameType, out int msgLength)
{
if (maxLength < PTP_HEADER_LENGTH) // not enough data
{
frameType = BacnetPtpFrameTypes.FRAME_TYPE_CONNECT_REQUEST; // don't care
msgLength = 0;
return(-1); //not enough data
}
frameType = (BacnetPtpFrameTypes)buffer[offset + 2];
msgLength = (buffer[offset + 3] << 8) | (buffer[offset + 4] << 0);
var crcHeader = buffer[offset + 5];
ushort crcData = 0;
if (msgLength > 0)
{
if (offset + 6 + msgLength + 1 >= buffer.Length)
{
return(-1);
}
crcData = (ushort)((buffer[offset + 6 + msgLength + 1] << 8) | (buffer[offset + 6 + msgLength + 0] << 0));
}
if (buffer[offset + 0] != PTP_PREAMBLE1)
{
return(-1);
}
if (buffer[offset + 1] != PTP_PREAMBLE2)
{
return(-1);
}
if (MSTP.CRC_Calc_Header(buffer, offset + 2, 3) != crcHeader)
{
return(-1);
}
if (msgLength > 0 && maxLength >= PTP_HEADER_LENGTH + msgLength + 2 && MSTP.CRC_Calc_Data(buffer, offset + 6, msgLength) != crcData)
{
return(-1);
}
return(8 + msgLength + (msgLength > 0 ? 2 : 0));
}
public static int Encode(byte[] buffer, int offset, BacnetPtpFrameTypes frameType, int msgLength)
{
buffer[offset + 0] = PTP_PREAMBLE1;
buffer[offset + 1] = PTP_PREAMBLE2;
buffer[offset + 2] = (byte)frameType;
buffer[offset + 3] = (byte)((msgLength & 0xFF00) >> 8);
buffer[offset + 4] = (byte)((msgLength & 0x00FF) >> 0);
buffer[offset + 5] = MSTP.CRC_Calc_Header(buffer, offset + 2, 3);
if (msgLength > 0)
{
//calculate data crc
var dataCrc = MSTP.CRC_Calc_Data(buffer, offset + 6, msgLength);
buffer[offset + 6 + msgLength + 0] = (byte)(dataCrc & 0xFF); //LSB first!
buffer[offset + 6 + msgLength + 1] = (byte)(dataCrc >> 8);
}
return(PTP_HEADER_LENGTH + msgLength + (msgLength > 0 ? 2 : 0));
}
private void SendFrame(MessageFrame frame)
{
if (SourceAddress == -1 || _port == null)
{
return;
}
int tx;
if (frame.Data == null || frame.Data.Length == 0)
{
var tmpTransmitBuffer = new byte[MSTP.MSTP_HEADER_LENGTH];
tx = MSTP.Encode(tmpTransmitBuffer, 0, frame.FrameType, frame.DestinationAddress,
(byte)SourceAddress, 0);
_port.Write(tmpTransmitBuffer, 0, tx);
}
else
{
tx = MSTP.Encode(frame.Data, 0, frame.FrameType, frame.DestinationAddress, (byte)SourceAddress,
frame.DataLength);
_port.Write(frame.Data, 0, tx);
}
frame.SendMutex.Set();
Log.AddCustomEvent(LagoVista.Core.PlatformSupport.LogLevel.Message, "BacnetMstpProtocol", $"{frame.FrameType} {frame.DestinationAddress:X2}");
}
private GetMessageStatus GetNextMessage(int timeoutMs, out BacnetMstpFrameTypes frameType,
out byte destinationAddress, out byte sourceAddress, out int msgLength)
{
int timeout;
frameType = BacnetMstpFrameTypes.FRAME_TYPE_TOKEN;
destinationAddress = 0;
sourceAddress = 0;
msgLength = 0;
//fetch header
while (_localOffset < MSTP.MSTP_HEADER_LENGTH)
{
if (_port == null)
{
return(GetMessageStatus.ConnectionClose);
}
timeout = _localOffset > 0
? T_FRAME_ABORT // set sub timeout
: timeoutMs; // set big silence timeout
//read
var rx = _port.Read(_localBuffer, _localOffset, MSTP.MSTP_HEADER_LENGTH - _localOffset, timeout);
if (rx == -ETIMEDOUT)
{
//drop message
var status = _localOffset == 0 ? GetMessageStatus.Timeout : GetMessageStatus.SubTimeout;
_localBuffer[0] = 0xFF;
RemoveGarbage();
return(status);
}
if (rx < 0)
{
//drop message
_localBuffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.ConnectionError);
}
if (rx == 0)
{
//drop message
_localBuffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.ConnectionClose);
}
_localOffset += rx;
//remove paddings & garbage
RemoveGarbage();
}
//decode
if (MSTP.Decode(_localBuffer, 0, _localOffset, out frameType, out destinationAddress,
out sourceAddress, out msgLength) < 0)
{
//drop message
_localBuffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.DecodeError);
}
//valid length?
var fullMsgLength = msgLength + MSTP.MSTP_HEADER_LENGTH + (msgLength > 0 ? 2 : 0);
if (msgLength > MaxBufferLength)
{
//drop message
_localBuffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.DecodeError);
}
//fetch data
if (msgLength > 0)
{
timeout = T_FRAME_ABORT; //set sub timeout
while (_localOffset < fullMsgLength)
{
//read
var rx = _port.Read(_localBuffer, _localOffset, fullMsgLength - _localOffset, timeout);
if (rx == -ETIMEDOUT)
{
//drop message
var status = _localOffset == 0 ? GetMessageStatus.Timeout : GetMessageStatus.SubTimeout;
_localBuffer[0] = 0xFF;
RemoveGarbage();
return(status);
}
if (rx < 0)
{
//drop message
_localBuffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.ConnectionError);
}
if (rx == 0)
{
//drop message
_localBuffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.ConnectionClose);
}
_localOffset += rx;
}
//verify data crc
if (
MSTP.Decode(_localBuffer, 0, _localOffset, out frameType, out destinationAddress,
out sourceAddress, out msgLength) < 0)
{
//drop message
_localBuffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.DecodeError);
}
}
//signal frame event
if (FrameRecieved != null)
{
var frameTypeCopy = frameType;
var destinationAddressCopy = destinationAddress;
var sourceAddressCopy = sourceAddress;
var msgLengthCopy = msgLength;
ThreadPool.QueueUserWorkItem(
o => { FrameRecieved(this, frameTypeCopy, destinationAddressCopy, sourceAddressCopy, msgLengthCopy); }, null);
}
Log.Debug($"{frameType} {destinationAddress:X2}");
//done
return(GetMessageStatus.Good);
}
private GetMessageStatus GetNextMessage(int timeout_ms, out BacnetMstpFrameTypes frame_type, out byte destination_address, out byte source_address, out int msg_length)
{
int timeout;
frame_type = BacnetMstpFrameTypes.FRAME_TYPE_TOKEN;
destination_address = 0;
source_address = 0;
msg_length = 0;
//fetch header
while (m_local_offset < MSTP.MSTP_HEADER_LENGTH)
{
if (m_port == null)
{
return(GetMessageStatus.ConnectionClose);
}
if (m_local_offset > 0)
{
timeout = T_FRAME_ABORT; //set sub timeout
}
else
{
timeout = timeout_ms; //set big silence timeout
}
//read
int rx = m_port.Read(m_local_buffer, m_local_offset, MSTP.MSTP_HEADER_LENGTH - m_local_offset, timeout);
if (rx == -ETIMEDOUT)
{
//drop message
GetMessageStatus status = m_local_offset == 0 ? GetMessageStatus.Timeout : GetMessageStatus.SubTimeout;
m_local_buffer[0] = 0xFF;
RemoveGarbage();
return(status);
}
if (rx < 0)
{
//drop message
m_local_buffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.ConnectionError);
}
if (rx == 0)
{
//drop message
m_local_buffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.ConnectionClose);
}
m_local_offset += rx;
//remove paddings & garbage
RemoveGarbage();
}
//decode
if (MSTP.Decode(m_local_buffer, 0, m_local_offset, out frame_type, out destination_address, out source_address, out msg_length) < 0)
{
//drop message
m_local_buffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.DecodeError);
}
//valid length?
int full_msg_length = msg_length + MSTP.MSTP_HEADER_LENGTH + (msg_length > 0 ? 2 : 0);
if (msg_length > MaxBufferLength)
{
//drop message
m_local_buffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.DecodeError);
}
//fetch data
if (msg_length > 0)
{
timeout = T_FRAME_ABORT; //set sub timeout
while (m_local_offset < full_msg_length)
{
//read
int rx = m_port.Read(m_local_buffer, m_local_offset, full_msg_length - m_local_offset, timeout);
if (rx == -ETIMEDOUT)
{
//drop message
GetMessageStatus status = m_local_offset == 0 ? GetMessageStatus.Timeout : GetMessageStatus.SubTimeout;
m_local_buffer[0] = 0xFF;
RemoveGarbage();
return(status);
}
if (rx < 0)
{
//drop message
m_local_buffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.ConnectionError);
}
if (rx == 0)
{
//drop message
m_local_buffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.ConnectionClose);
}
m_local_offset += rx;
}
//verify data crc
if (MSTP.Decode(m_local_buffer, 0, m_local_offset, out frame_type, out destination_address, out source_address, out msg_length) < 0)
{
//drop message
m_local_buffer[0] = 0xFF;
RemoveGarbage();
return(GetMessageStatus.DecodeError);
}
}
//signal frame event
if (FrameRecieved != null)
{
BacnetMstpFrameTypes _frame_type = frame_type;
byte _destination_address = destination_address;
byte _source_address = source_address;
int _msg_length = msg_length;
ThreadPool.QueueUserWorkItem((o) => { FrameRecieved(this, _frame_type, _destination_address, _source_address, _msg_length); }, null);
}
if (StateLogging)
{
Trace.WriteLine("" + frame_type + " " + destination_address.ToString("X2") + " ");
}
//done
return(GetMessageStatus.Good);
}
