/// <summary>
/// Casts the parsed <see cref="IChannelFrame"/> to its specific implementation (i.e., <see cref="DataFrame"/>, <see cref="ConfigurationFrame"/> or <see cref="CommandFrame"/>).
/// </summary>
/// <param name="frame"><see cref="IChannelFrame"/> that was parsed by <see cref="FrameImageParserBase{TTypeIdentifier,TOutputType}"/> that implements protocol specific common frame header interface.</param>
protected override void OnReceivedChannelFrame(IChannelFrame frame)
{
// Raise abstract channel frame events as a priority (i.e., IDataFrame, IConfigurationFrame, etc.)
base.OnReceivedChannelFrame(frame);
// Raise IEC 61850-90-5 specific channel frame events, if any have been subscribed
if (frame != null && (ReceivedDataFrame != null || ReceivedConfigurationFrame != null || ReceivedCommandFrame != null))
{
DataFrame dataFrame = frame as DataFrame;
if (dataFrame != null)
{
if (ReceivedDataFrame != null)
{
ReceivedDataFrame(this, new EventArgs <DataFrame>(dataFrame));
}
}
else
{
ConfigurationFrame configFrame = frame as ConfigurationFrame;
if (configFrame != null)
{
if (ReceivedConfigurationFrame != null)
{
ReceivedConfigurationFrame(this, new EventArgs <ConfigurationFrame>(configFrame));
}
}
else
{
CommandFrame commandFrame = frame as CommandFrame;
if (commandFrame != null)
{
if (ReceivedCommandFrame != null)
{
ReceivedCommandFrame(this, new EventArgs <CommandFrame>(commandFrame));
}
}
}
}
}
}
/// <summary>
/// Sends the specified <see cref="DeviceCommand"/> to the remote device.
/// </summary>
/// <param name="command"><see cref="DeviceCommand"/> to send to the remote device.</param>
/// <remarks>
/// Command will only be sent if <see cref="DeviceSupportsCommands"/> is <c>true</c> and <see cref="MultiProtocolFrameParser"/>.
/// </remarks>
/// <returns>A <see cref="WaitHandle"/>.</returns>
public WaitHandle SendDeviceCommand(DeviceCommand command)
{
WaitHandle handle = null;
try
{
if (m_deviceSupportsCommands && ((object)m_dataChannel != null || (object)m_serverBasedDataChannel != null || (object)m_commandChannel != null))
{
ICommandFrame commandFrame;
// Only the IEEE, SEL Fast Message and Macrodyne protocols support commands
switch (m_phasorProtocol)
{
case PhasorProtocol.IEEEC37_118V2:
case PhasorProtocol.IEEEC37_118V1:
case PhasorProtocol.IEEEC37_118D6:
commandFrame = new IEEEC37_118.CommandFrame(m_deviceID, command, 1);
break;
case PhasorProtocol.IEEE1344:
commandFrame = new IEEE1344.CommandFrame(m_deviceID, command);
break;
case PhasorProtocol.IEC61850_90_5:
commandFrame = new IEC61850_90_5.CommandFrame(m_deviceID, command, 1);
break;
case PhasorProtocol.SelFastMessage:
// Get defined message period
MessagePeriod messagePeriod = MessagePeriod.DefaultRate;
SelFastMessage.ConnectionParameters connectionParameters = m_connectionParameters as SelFastMessage.ConnectionParameters;
if ((object)connectionParameters != null)
messagePeriod = connectionParameters.MessagePeriod;
commandFrame = new SelFastMessage.CommandFrame(command, messagePeriod);
break;
case PhasorProtocol.Macrodyne:
commandFrame = new Macrodyne.CommandFrame(command);
break;
default:
commandFrame = null;
break;
}
if ((object)commandFrame != null)
{
byte[] buffer = commandFrame.BinaryImage();
// Send command over appropriate communications channel - command channel, if defined,
// will take precedence over other communications channels for command traffic...
if ((object)m_commandChannel != null && m_commandChannel.CurrentState == ClientState.Connected)
{
handle = m_commandChannel.SendAsync(buffer, 0, buffer.Length);
}
else if ((object)m_dataChannel != null && m_dataChannel.CurrentState == ClientState.Connected)
{
handle = m_dataChannel.SendAsync(buffer, 0, buffer.Length);
}
else if ((object)m_serverBasedDataChannel != null && m_serverBasedDataChannel.CurrentState == ServerState.Running)
{
WaitHandle[] handles = m_serverBasedDataChannel.MulticastAsync(buffer, 0, buffer.Length);
if ((object)handles != null && handles.Length > 0)
handle = handles[0];
}
if ((object)SentCommandFrame != null)
SentCommandFrame(this, new EventArgs<ICommandFrame>(commandFrame));
}
}
}
catch (Exception ex)
{
OnParsingException(ex, "Failed to send device command \"{0}\": {1}", command, ex.Message);
}
return handle;
}
/// <summary>
/// Handles incoming commands from devices connected over the command channel.
/// </summary>
/// <param name="clientID">Guid of client that sent the command.</param>
/// <param name="connectionID">Remote client connection identification (i.e., IP:Port).</param>
/// <param name="commandBuffer">Data buffer received from connected client device.</param>
/// <param name="length">Valid length of data within the buffer.</param>
protected override void DeviceCommandHandler(Guid clientID, string connectionID, byte[] commandBuffer, int length)
{
try
{
// Interpret data received from a client as a command frame
CommandFrame commandFrame = new CommandFrame(commandBuffer, 0, length);
IServer commandChannel = (IServer)CommandChannel ?? DataChannel;
// Validate incoming ID code if requested
if (!m_validateIDCode || commandFrame.IDCode == this.IDCode)
{
switch (commandFrame.Command)
{
case DeviceCommand.SendConfigurationFrame1:
case DeviceCommand.SendConfigurationFrame2:
if (commandChannel != null)
{
commandChannel.SendToAsync(clientID, m_configurationFrame.BinaryImage, 0, m_configurationFrame.BinaryLength);
OnStatusMessage(MessageLevel.Info, $"Received request for \"{commandFrame.Command}\" from \"{connectionID}\" - frame was returned.");
}
break;
case DeviceCommand.EnableRealTimeData:
// Only responding to stream control command if auto-start data channel is false
if (!AutoStartDataChannel)
{
StartDataChannel();
OnStatusMessage(MessageLevel.Info, $"Received request for \"EnableRealTimeData\" from \"{connectionID}\" - concentrator real-time data stream was started.");
}
else
{
OnStatusMessage(MessageLevel.Info, $"Request for \"EnableRealTimeData\" from \"{connectionID}\" was ignored - concentrator data channel is set for auto-start.");
}
break;
case DeviceCommand.DisableRealTimeData:
// Only responding to stream control command if auto-start data channel is false
if (!AutoStartDataChannel)
{
StopDataChannel();
OnStatusMessage(MessageLevel.Info, $"Received request for \"DisableRealTimeData\" from \"{connectionID}\" - concentrator real-time data stream was stopped.");
}
else
{
OnStatusMessage(MessageLevel.Info, $"Request for \"DisableRealTimeData\" from \"{connectionID}\" was ignored - concentrator data channel is set for auto-start.");
}
break;
default:
OnStatusMessage(MessageLevel.Info, $"Request for \"{commandFrame.Command}\" from \"{connectionID}\" was ignored - device command is unsupported.");
break;
}
}
else
{
OnStatusMessage(MessageLevel.Warning, $"Concentrator ID code validation failed for device command \"{commandFrame.Command}\" from \"{connectionID}\" - no action was taken.");
}
}
catch (Exception ex)
{
OnProcessException(MessageLevel.Warning, new InvalidOperationException($"Remotely connected device \"{connectionID}\" sent an unrecognized data sequence to the concentrator, no action was taken. Exception details: {ex.Message}", ex));
}
}
