internal void ReceiveRequestCompleted(IAsyncResult ar)
{
IPEndPoint masterEndPoint = null;
byte[] frame;
try
{
frame = _client.EndReceive(ar, ref masterEndPoint);
}
catch (ObjectDisposedException)
{
// this hapens when slave stops
return;
}
ModbusUdpSlave slave = (ModbusUdpSlave)ar.AsyncState;
_log.DebugFormat("Read Frame completed {0} bytes", frame.Length);
_log.InfoFormat("RX: {0}", StringUtility.Join(", ", frame));
IModbusMessage request = ModbusMessageFactory.CreateModbusRequest(CollectionUtility.Slice(frame, 6, frame.Length - 6));
request.TransactionID = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(frame, 0));
// TODO refactor
ModbusUdpTransport transport = new ModbusUdpTransport();
// perform action and build response
IModbusMessage response = slave.ApplyRequest(request);
response.TransactionID = request.TransactionID;
// write response
byte[] responseFrame = transport.BuildMessageFrame(response);
_log.InfoFormat("TX: {0}", StringUtility.Join(", ", responseFrame));
_client.BeginSend(responseFrame, responseFrame.Length, masterEndPoint, WriteResponseCompleted, null);
}
internal void ReceiveRequestCompleted(IAsyncResult ar)
{
IPEndPoint masterEndPoint = null;
byte[] frame;
try
{
frame = _client.EndReceive(ar, ref masterEndPoint);
}
catch (ObjectDisposedException)
{
// this hapens when slave stops
return;
}
ModbusUdpSlave slave = (ModbusUdpSlave) ar.AsyncState;
_log.DebugFormat("Read Frame completed {0} bytes", frame.Length);
_log.InfoFormat("RX: {0}", StringUtility.Join(", ", frame));
IModbusMessage request = ModbusMessageFactory.CreateModbusRequest(CollectionUtility.Slice(frame, 6, frame.Length - 6));
request.TransactionID = (ushort) IPAddress.NetworkToHostOrder(BitConverter.ToInt16(frame, 0));
// TODO refactor
ModbusUdpTransport transport = new ModbusUdpTransport();
// perform action and build response
IModbusMessage response = slave.ApplyRequest(request);
response.TransactionID = request.TransactionID;
// write response
byte[] responseFrame = transport.BuildMessageFrame(response);
_log.InfoFormat("TX: {0}", StringUtility.Join(", ", responseFrame));
_client.BeginSend(responseFrame, responseFrame.Length, masterEndPoint, WriteResponseCompleted, null);
}
