/// <summary>
/// Catches all exceptions thrown when action is executed and removes the master end point.
/// The exception is ignored when it simply signals a master closing its connection.
/// </summary>
internal void CatchExceptionAndRemoveMasterEndPoint(Action action, string endPoint)
{
if (action == null)
throw new ArgumentNullException("action");
if (endPoint == null)
throw new ArgumentNullException("endPoint");
if (endPoint.IsNullOrEmpty())
throw new ArgumentException("Argument endPoint cannot be empty.");
try
{
action.Invoke();
}
catch (IOException ioe)
{
_log.DebugFormat("IOException encountered in ReadHeaderCompleted - {0}", ioe.Message);
ModbusMasterTcpConnectionClosed.Raise(this, new TcpConnectionEventArgs(EndPoint));
SocketException socketException = ioe.InnerException as SocketException;
if (socketException != null && socketException.ErrorCode == Modbus.ConnectionResetByPeer)
{
_log.Debug("Socket Exception ConnectionResetByPeer, Master closed connection.");
return;
}
throw;
}
catch (Exception e)
{
_log.Error("Unexpected exception encountered", e);
throw;
}
}
/// <summary>
/// Catches all exceptions thrown when action is executed and removes the master end point.
/// The exception is ignored when it simply signals a master closing its connection.
/// </summary>
internal void CatchExceptionAndRemoveMasterEndPoint(Action action, string endPoint)
{
try
{
if (action == null)
{
throw new ArgumentNullException("action");
}
if (endPoint == null)
{
throw new ArgumentNullException("endPoint");
}
if (endPoint.IsNullOrEmpty())
{
throw new ArgumentException("Argument endPoint cannot be empty.");
}
try
{
action.Invoke();
}
catch (IOException ioe)
{
_log.DebugFormat("IOException encountered in ReadHeaderCompleted - {0}", ioe.Message);
ModbusMasterTcpConnectionClosed.Raise(this, new TcpConnectionEventArgs(EndPoint));
SocketException socketException = ioe.InnerException as SocketException;
if (socketException != null && socketException.ErrorCode == Modbus.ConnectionResetByPeer)
{
_log.Debug("Socket Exception ConnectionResetByPeer, Master closed connection.");
return;
}
Console.WriteLine("Caught some unknown exception but not throwing it: " + ioe.Message);
throw;
}
catch (ArgumentException e)
{
//We don't have handle this but we don't want to crash
if (e.Message.Contains("Unsupported function code"))
{
Console.WriteLine(e.Message);
}
}
catch (Exception e)
{
_log.Error("Unexpected exception encountered", e);
Console.WriteLine("Caught some unknown exception but not throwing it: " + e.Message);
throw;
}
}
catch (Exception err)
{
Console.WriteLine("Caught Some Exception not thowing " + err.Message);
}
}
internal void ReadHeaderCompleted(IAsyncResult ar)
{
Debug.WriteLine("Read header completed.");
CatchExceptionAndRemoveMasterEndPoint(() =>
{
// this is the normal way a master closes its connection
if (Stream.EndRead(ar) == 0)
{
Debug.WriteLine("0 bytes read, Master has closed Socket connection.");
ModbusMasterTcpConnectionClosed.Raise(this, new TcpConnectionEventArgs(EndPoint));
return;
}
Debug.WriteLine("MBAP header: {0}", string.Join(", ", _mbapHeader));
ushort frameLength = (ushort)IPAddress.HostToNetworkOrder(BitConverter.ToInt16(_mbapHeader, 4));
Debug.WriteLine("{0} bytes in PDU.", frameLength);
_messageFrame = new byte[frameLength];
Stream.BeginRead(_messageFrame, 0, frameLength, ReadFrameCompleted, null);
}, EndPoint);
}
/// <summary>
/// Catches all exceptions thrown when action is executed and removes the master end point.
/// The exception is ignored when it simply signals a master closing its connection.
/// </summary>
internal void CatchExceptionAndRemoveMasterEndPoint(Action action, string endPoint)
{
if (action == null)
{
throw new ArgumentNullException("action");
}
if (endPoint == null)
{
throw new ArgumentNullException("endPoint");
}
if (endPoint == string.Empty)
{
throw new ArgumentException(Resources.EmptyEndPoint);
}
try
{
action.Invoke();
}
catch (IOException ioe)
{
Debug.WriteLine("IOException encountered in ReadHeaderCompleted - {0}", ioe.Message);
ModbusMasterTcpConnectionClosed.Raise(this, new TcpConnectionEventArgs(EndPoint));
SocketException socketException = ioe.InnerException as SocketException;
if (socketException != null && socketException.ErrorCode == Modbus.ConnectionResetByPeer)
{
Debug.WriteLine("Socket Exception ConnectionResetByPeer, Master closed connection.");
return;
}
throw;
}
catch (Exception e)
{
Debug.WriteLine("Unexpected exception encountered: [{0}] {1}", e.GetType().Name, e.Message);
throw;
}
}
internal void ReadHeaderCompleted(IAsyncResult ar)
{
Log.Debug("XmlSettingsReadFile header completed.");
CatchExceptionAndRemoveMasterEndPoint(() =>
{
// this is the normal way a master closes its connection
if (Stream.EndRead(ar) == 0)
{
Log.Debug("0 bytes read, Master has closed Socket connection.");
ModbusMasterTcpConnectionClosed.Raise(this, new TcpConnectionEventArgs(EndPoint));
return;
}
Log.Debug($"MBAP header: {_mbapHeader.JoinByCommas()}");
ushort frameLength = (ushort)IPAddress.HostToNetworkOrder(BitConverter.ToInt16(_mbapHeader, 4));
Log.Debug($"{frameLength} bytes in PDU.");
_messageFrame = new byte[frameLength];
Stream.BeginRead(_messageFrame, 0, frameLength, ReadFrameCompleted, null);
}, EndPoint);
}
