/// <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="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, byte[] commandBuffer, int length)
{
try
{
// Interpret data received from a client as a command frame
CommandFrame commandFrame = new CommandFrame(commandBuffer, 0, length);
TcpServer commandChannel = CommandChannel;
switch (commandFrame.Command)
{
case DeviceCommand.SendConfigurationFrame1:
case DeviceCommand.SendConfigurationFrame2:
if (commandChannel != null)
{
commandChannel.SendToAsync(clientID, m_configurationFrame.BinaryImage);
OnStatusMessage("Received device command \"{0}\" - frame was returned.", commandFrame.Command);
}
break;
case DeviceCommand.SendHeaderFrame:
if (commandChannel != null)
{
HeaderFrame headerFrame = new HeaderFrame("IEEE C37.118 Concentrator Status:\r\n\r\n" + Status);
commandChannel.SendToAsync(clientID, headerFrame.BinaryImage);
OnStatusMessage("Received device command \"SendHeaderFrame\" - frame was returned.");
}
break;
case DeviceCommand.EnableRealTimeData:
// Only responding to stream control command if auto-start data channel is false
if (!AutoStartDataChannel)
{
StartDataChannel();
OnStatusMessage("Received device command \"EnableRealTimeData\" - concentrator real-time data stream was started.");
}
break;
case DeviceCommand.DisableRealTimeData:
// Only responding to stream control command if auto-start data channel is false
if (!AutoStartDataChannel)
{
StopDataChannel();
OnStatusMessage("Received device command \"DisableRealTimeData\" - concentrator real-time data stream was stopped.");
}
break;
default:
OnStatusMessage("Received unsupported device command: {0}", commandFrame.Command);
break;
}
}
catch (Exception ex)
{
OnProcessException(new InvalidOperationException(string.Format("Encountered an exception while processing received client data: {0}", ex.Message), ex));
}
}
/// <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>
public virtual void SendDeviceCommand(DeviceCommand command)
{
if (m_deviceSupportsCommands && (m_dataChannel != null || m_serverBasedDataChannel != null || m_commandChannel != null))
{
ICommandFrame commandFrame;
// Only the IEEE and SEL Fast Message protocols support commands
switch (m_phasorProtocol)
{
case PhasorProtocols.PhasorProtocol.IeeeC37_118V1:
case PhasorProtocols.PhasorProtocol.IeeeC37_118D6:
commandFrame = new IeeeC37_118.CommandFrame(m_deviceID, command, 1);
break;
case PhasorProtocols.PhasorProtocol.Ieee1344:
commandFrame = new Ieee1344.CommandFrame(m_deviceID, command);
break;
case PhasorProtocols.PhasorProtocol.SelFastMessage:
// Get defined message period
SelFastMessage.MessagePeriod messagePeriod = SelFastMessage.MessagePeriod.DefaultRate;
SelFastMessage.ConnectionParameters connectionParameters = m_connectionParameters as SelFastMessage.ConnectionParameters;
if (connectionParameters != null)
messagePeriod = connectionParameters.MessagePeriod;
commandFrame = new SelFastMessage.CommandFrame(command, messagePeriod);
break;
default:
commandFrame = null;
break;
}
if (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 (m_commandChannel != null)
m_commandChannel.SendAsync(buffer, 0, buffer.Length);
else if (m_dataChannel != null)
m_dataChannel.SendAsync(buffer, 0, buffer.Length);
else
m_serverBasedDataChannel.MulticastAsync(buffer, 0, buffer.Length);
if (SentCommandFrame != null)
SentCommandFrame(this, new EventArgs<ICommandFrame>(commandFrame));
}
}
}
