private void appendReceivedDataToString(ref string incomingData)
{
byte[] tempBuffer;
string bufferAsString;
int bytesToRead;
bytesToRead = m_serialPort.BytesToRead;
if (bytesToRead > 0)
{
tempBuffer = new byte[bytesToRead];
m_serialPort.Read(tempBuffer, 0, bytesToRead);
bufferAsString = ASCIIEncoding.ASCII.GetString(tempBuffer);
incomingData += bufferAsString;
ComDriverLogger.LogReceivedMessageChunk(DateTime.Now,
Utils.HelperComDriverLogger.GetLoggerChannel(this), tempBuffer);
}
}
private void appendReceivedDataToArray(ref byte[] incomingData)
{
byte[] tempBuffer;
byte[] copyOfBuffer;
int bytesToRead;
bytesToRead = m_serialPort.BytesToRead;
if (bytesToRead > 0)
{
tempBuffer = new byte[bytesToRead];
m_serialPort.Read(tempBuffer, 0, bytesToRead);
copyOfBuffer = incomingData;
incomingData = new byte[copyOfBuffer.Length + tempBuffer.Length];
Array.Copy(copyOfBuffer, 0, incomingData, 0, copyOfBuffer.Length);
Array.Copy(tempBuffer, 0, incomingData, copyOfBuffer.Length, tempBuffer.Length);
ComDriverLogger.LogReceivedMessageChunk(DateTime.Now,
Utils.HelperComDriverLogger.GetLoggerChannel(this), tempBuffer);
}
}
internal void OnDataReceived(byte[] receivedBytes)
{
int cbRead = receivedBytes.Length;
byte[] tmpBuffer = new byte[receivedBuffer.Length + cbRead];
Array.Copy(receivedBuffer, 0, tmpBuffer, 0, receivedBuffer.Length);
Array.Copy(receivedBytes, 0, tmpBuffer, receivedBuffer.Length, cbRead);
receivedBuffer = tmpBuffer;
ComDriverLogger.LogReceivedMessageChunk(DateTime.Now,
Utils.HelperComDriverLogger.GetLoggerChannel(this), tmpBuffer);
if (inputMode == InputMode.ASCII)
{
ClientReceiveString();
}
else if (inputMode == InputMode.Binary)
{
ClientReceiveBytes();
}
}
private void socketReceivedBytes(byte[] incomingBytes, int count)
{
bool bStxFound = false;
byte[] tempBuffer;
string bufferAsString;
int index = 0;
int totalLength = 0;
byte[] tcpHeader;
const int HEADER_LENGTH = 24;
tcpHeader = ethernetHeader;
try
{
int cbRead = 0;
cbRead = count;
if (cbRead > 0)
{
byte[] temp = new byte[cbRead];
Array.Copy(incomingBytes, 0, temp, 0, cbRead);
ComDriverLogger.LogReceivedMessageChunk(DateTime.Now,
Utils.HelperComDriverLogger.GetLoggerChannel(this), temp);
byte[] tmpBuffer = new byte[incomingData.Length + cbRead];
Array.Copy(incomingData, 0, tmpBuffer, 0, incomingData.Length);
Array.Copy(temp, 0, tmpBuffer, incomingData.Length, cbRead);
incomingData = tmpBuffer;
}
else
{
// Socket was closed?
m_PLCSocket.Close();
}
}
catch
{
// Socket Error?
m_PLCSocket.Close();
}
if (incomingData.Length >= Utils.Lengths.LENGTH_TCP_HEADER)
{
if (incomingData.Take(4).SequenceEqual(tcpHeader) == true)
{
tempBuffer = new byte[incomingData.Length - 6];
Array.Copy(incomingData, 6, tempBuffer, 0, incomingData.Length - 6);
incomingData = tempBuffer;
}
else
{
//throw new ComDriveExceptions("Ethernet Transaction ID mismatch", ComDriveExceptions.ComDriveException.TransactionIdMismatch);
}
}
if (incomingData.Length > 0)
{
bufferAsString = ASCIIEncoding.ASCII.GetString(incomingData);
index = bufferAsString.IndexOf(STX_STRING);
if (index >= 0)
{
tempBuffer = new byte[incomingData.Length - index];
Array.Copy(incomingData, index, tempBuffer, 0, incomingData.Length - index);
incomingData = tempBuffer;
bStxFound = true;
}
else
{
if (incomingData.Length > 100)
{
throw new ComDriveExceptions("STX is missing",
ComDriveExceptions.ComDriveException.CommunicationTimeout);
}
}
}
if (!bStxFound)
{
return;
}
if (incomingData.Length < HEADER_LENGTH)
{
return;
}
totalLength = BitConverter.ToUInt16(incomingData, 20) +
HEADER_LENGTH + 3; // 3 for data checksum + ETX
if (incomingData.Length < totalLength)
{
return;
}
tempBuffer = new byte[totalLength];
Array.Copy(incomingData, 0, tempBuffer, 0, totalLength);
incomingData = tempBuffer;
tempBuffer = null;
if (incomingData[totalLength - 1] != 92) // 92 is '\' which is the ETX
{
throw new ComDriveExceptions("ETX is missing", ComDriveExceptions.ComDriveException.ETXMissing);
}
messageReceived = true;
}
private void socketReceivedString(byte[] incomingBytes, int count)
{
bool bStxFound = false;
bool bEtxFound = false;
string incomingString = "";
byte[] tempBuffer;
byte[] tcpHeader;
int index = 0;
int checksum = 0;
try
{
int cbRead = 0;
cbRead = count;
if (cbRead > 0)
{
byte[] temp = new byte[cbRead];
Array.Copy(incomingBytes, 0, temp, 0, cbRead);
ComDriverLogger.LogReceivedMessageChunk(DateTime.Now,
Utils.HelperComDriverLogger.GetLoggerChannel(this), temp);
byte[] tmpBuffer = new byte[incomingData.Length + cbRead];
Array.Copy(incomingData, 0, tmpBuffer, 0, incomingData.Length);
Array.Copy(temp, 0, tmpBuffer, incomingData.Length, cbRead);
incomingData = tmpBuffer;
}
else
{
// Socket was closed?
m_PLCSocket.Close();
}
}
catch
{
// Socket Error?
m_PLCSocket.Close();
}
tcpHeader = ethernetHeader;
incomingString = ASCIIEncoding.ASCII.GetString(incomingData);
if (!_suppressEthernetHeader && incomingString.Length >= Utils.Lengths.LENGTH_TCP_HEADER)
{
if (incomingData.Take(4).SequenceEqual(tcpHeader) == true)
{
tempBuffer = new byte[incomingString.Length - 6];
Array.Copy(incomingData, 6, tempBuffer, 0, incomingData.Length - 6);
incomingData = tempBuffer;
incomingString = ASCIIEncoding.ASCII.GetString(incomingData);
}
else
{
//throw new ComDriveExceptions("Ethernet Transaction ID mismatch", ComDriveExceptions.ComDriveException.TransactionIdMismatch);
}
}
if (incomingString.Length > 0)
{
index = incomingString.IndexOf("/"); // find the STX
if (index >= 0)
{
incomingString = incomingString.Substring(index, incomingString.Length - index);
bStxFound = true;
}
else
{
if (incomingString.Length > 100)
{
throw new ComDriveExceptions("STX is missing",
ComDriveExceptions.ComDriveException.CommunicationTimeout);
}
}
index = incomingString.IndexOf("\r"); // find the ETX
if (index >= 0)
{
incomingString = incomingString.Substring(0, index + 1);
bEtxFound = true;
}
}
if (!bStxFound || !bEtxFound)
{
return;
}
for (int i = 2; i < incomingString.Length - 3; i++)
{
checksum += incomingData[i];
}
string CRC = Utils.DecimalToHex(checksum % 256);
if (CRC != incomingString.Substring(incomingString.Length - 3, 2))
{
throw new ComDriveExceptions("Wrong Data Checksum", ComDriveExceptions.ComDriveException.ChecksumError);
}
messageReceived = true;
}
private void serialPortReceiveBytes(byte[] incomingBytes, int count)
{
bool bStxFound = false;
byte[] tempBuffer;
string bufferAsString;
int index = 0;
UInt16 pcCheckSum;
int totalLength = 0;
const int HEADER_LENGTH = 24;
if (count > 0)
{
byte[] temp = new byte[count];
Array.Copy(incomingBytes, 0, temp, 0, count);
ComDriverLogger.LogReceivedMessageChunk(DateTime.Now,
Utils.HelperComDriverLogger.GetLoggerChannel(this), temp);
byte[] tmpBuffer = new byte[resultBytes.Length + count];
Array.Copy(resultBytes, 0, tmpBuffer, 0, resultBytes.Length);
Array.Copy(temp, 0, tmpBuffer, resultBytes.Length, count);
resultBytes = tmpBuffer;
}
if (resultBytes.Length > 0)
{
bufferAsString = ASCIIEncoding.ASCII.GetString(resultBytes);
index = bufferAsString.IndexOf(STX_STRING);
if (index >= 0)
{
tempBuffer = new byte[resultBytes.Length - index];
Array.Copy(resultBytes, index, tempBuffer, 0, resultBytes.Length - index);
resultBytes = tempBuffer;
bStxFound = true;
}
else
{
if (resultBytes.Length > 100)
{
throw new ComDriveExceptions("STX is missing",
ComDriveExceptions.ComDriveException.CommunicationTimeout);
}
}
}
else
{
return;
}
if (!bStxFound)
{
return;
}
if (resultBytes.Length < HEADER_LENGTH)
{
return;
}
pcCheckSum = Utils.calcCheckSum(ref resultBytes, 0, 21);
if (pcCheckSum != BitConverter.ToUInt16(resultBytes, 22))
{
throw new ComDriveExceptions("Wrong Header Checksum",
ComDriveExceptions.ComDriveException.ChecksumError);
}
totalLength = BitConverter.ToUInt16(resultBytes, 20) +
HEADER_LENGTH + 3; // 3 for data checksum + ETX
if (resultBytes.Length < totalLength)
{
return;
}
tempBuffer = new byte[totalLength];
Array.Copy(resultBytes, 0, tempBuffer, 0, totalLength);
resultBytes = tempBuffer;
tempBuffer = null;
pcCheckSum = Utils.calcCheckSum(ref resultBytes, 24, totalLength - 4);
if (pcCheckSum != BitConverter.ToUInt16(resultBytes, totalLength - 3))
{
throw new ComDriveExceptions("Wrong Data Checksum", ComDriveExceptions.ComDriveException.ChecksumError);
}
if (resultBytes[totalLength - 1] != 92) // 92 is '\' which is the ETX
{
throw new ComDriveExceptions("ETX is missing", ComDriveExceptions.ComDriveException.ETXMissing);
}
messageReceived = true;
}
private void serialPortReceiveString(byte[] incomingBytes, int count)
{
bool bStxFound = false;
bool bEtxFound = false;
int index = 0;
int checksum = 0;
string resultString;
if (count > 0)
{
byte[] temp = new byte[count];
Array.Copy(incomingBytes, 0, temp, 0, count);
ComDriverLogger.LogReceivedMessageChunk(DateTime.Now,
Utils.HelperComDriverLogger.GetLoggerChannel(this), temp);
byte[] tmpBuffer = new byte[resultBytes.Length + count];
Array.Copy(resultBytes, 0, tmpBuffer, 0, resultBytes.Length);
Array.Copy(temp, 0, tmpBuffer, resultBytes.Length, count);
resultBytes = tmpBuffer;
}
resultString = ASCIIEncoding.ASCII.GetString(resultBytes);
if (resultString.Length > 0)
{
index = resultString.IndexOf("/"); // find the STX
if (index >= 0)
{
resultString = resultString.Substring(index, resultString.Length - index);
byte[] tempBuffer = new byte[resultBytes.Length - index];
Array.Copy(resultBytes, index, tempBuffer, 0, resultBytes.Length - index);
resultBytes = tempBuffer;
bStxFound = true;
}
else
{
if (resultString.Length > 100)
{
throw new ComDriveExceptions("STX is missing",
ComDriveExceptions.ComDriveException.CommunicationTimeout);
}
}
index = resultString.IndexOf("\r"); // find the ETX
if (index >= 0)
{
resultString = resultString.Substring(0, index + 1);
bEtxFound = true;
}
}
else
{
return;
}
if (!bStxFound || !bEtxFound)
{
return;
}
for (int i = 2; i < resultString.Length - 3; i++)
{
checksum += resultBytes[i];
}
string CRC = Utils.DecimalToHex(checksum % 256);
if (CRC != resultString.Substring(resultString.Length - 3, 2))
{
throw new ComDriveExceptions("Wrong Data Checksum", ComDriveExceptions.ComDriveException.ChecksumError);
}
messageReceived = true;
}