public void TestAckFrame()
{
var frame = MBusFrame.FromByteArray(MBusFrameType.SingleChar, NullLogger.Instance, new[] { MBus.SingleCharFrame });
Assert.NotNull(frame);
Assert.Equal(typeof(AckFrame), frame.GetType());
}
public void TestShortFrame()
{
var frame = MBusFrame.FromByteArray(MBusFrameType.ShortFrame, NullLogger.Instance, new byte[] { 0x10, 0x40, 0xF0, 0x30, 0x16 });
Assert.NotNull(frame);
Assert.Equal(typeof(ShortFrame), frame.GetType());
}
public void TestInvalidCrcTest()
{
var completeFrame = Automatica.Core.Driver.Utility.Utils.StringToByteArray(
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
var frame = MBusFrame.FromByteArray(MBusFrameType.LongFrame, NullLogger.Instance, completeFrame) as VariableDataFrame;
Assert.Null(frame);
}
public void Test_MBusFrame_Get_Iv()
{
var excpectedIv = Automatica.Core.Driver.Utility.Utils.StringToByteArray("2D4C00000000010E0D0D0D0D0D0D0D0D");
var frame = MBusFrame.FromByteArray(MBusFrameType.LongFrame, NullLogger.Instance,
Automatica.Core.Driver.Utility.Utils.StringToByteArray(
"685F5F6853F05B000000002D4C010E0D0050053FD0FEB726760CC7AAF0B52B41F0C541BD6306DCD8B91B3DA2311EF13D2514D0960082161EFEC4B6CB1E0B3328BE6177DCA594C1280024A835F1D655BA7182B256E94BD33AC0A6B08DA46781EB4E91E01216"));
var iv = OmsHelper.GetIvFromMBusFrame(frame);
Assert.Equal(excpectedIv, iv);
}
public void TestVariableDataFrame2()
{
var completeFrame = Automatica.Core.Driver.Utility.Utils.StringToByteArray(
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
var frame = MBusFrame.FromByteArray(MBusFrameType.LongFrame, NullLogger.Instance, completeFrame) as VariableDataFrame;
Assert.NotNull(frame);
Assert.Equal(37351000d, frame.DataBlocks[1].Value);
Assert.Equal(561.08, frame.DataBlocks[2].Value);
Assert.Equal(985, frame.DataBlocks[3].Value);
Assert.Equal(101.69, frame.DataBlocks[4].Value);
Assert.Equal(46.160000000000004, frame.DataBlocks[5].Value);
}
public void Test_MBusFrame_Decrypt()
{
var expectedData = Automatica.Core.Driver.Utility.Utils.StringToByteArray(
"2F2F066D42222C5024100403C9D58D0004833C2BCA4B008410FB827386291D008410FB82F33CE5555900042B0000000004AB3CCD05000004FB140000000004FB943CA30100000483FF04000000002F2F");
var frame = MBusFrame.FromByteArray(MBusFrameType.LongFrame, NullLogger.Instance,
Automatica.Core.Driver.Utility.Utils.StringToByteArray(
"685F5F6873F05B000000002D4C010E00005005F72A3BA99D9128AB6008BEEE5336CA296EA1FFD143471C72DEAE2F716AB169FF071CC08605BC4EE99FC9D36ADE999BC910605B159ECBA642961D47560EB9C1E18071A883A18E7D5D9C8D81B9989880D6B016"));
var key = "57B7CBDF2154C01795C75CCCEAD572CF";
var aesKey = Automatica.Core.Driver.Utility.Utils.StringToByteArray(key);
var decryptedFrame = OmsHelper.AesDecryptFrame(aesKey, frame);
Assert.Equal(expectedData, decryptedFrame);
}
protected override async Task <MBusFrame> ReadFrame()
{
try
{
_receiveTimeoutTimer.Start();
_cts = new CancellationTokenSource();
var read = await Automatica.Core.Base.Extensions.AsyncExtensions.WithCancellation(_udpClient.ReceiveAsync(), _cts.Token);
_receiveTimeoutTimer.Stop();
var data = read.Buffer;
_cts = null;
Logger.LogHexIn(data);
if (read.Buffer.Length >= 4 && data[1] == data[2] && data[0] == data[3])
{
var length = data[1];
if (data.Length == length + 6)
{
if (data[0] == MBus.ShortFrameStart)
{
return(MBusFrame.FromByteArray(MBusFrameType.ShortFrame, Logger, data));
}
if (data[0] == MBus.ControlFrameLongFrameStart)
{
return(MBusFrame.FromByteArray(
data[2] == 3 ? MBusFrameType.ControlFrame : MBusFrameType.LongFrame, Logger, data));
}
}
}
else if (data.Length == 1 && data[0] == MBus.SingleCharFrame)
{
return(new AckFrame());
}
}
catch (Exception e)
{
_receiveTimeoutTimer.Stop();
Logger.LogError($"Error reading mbus frame {e}");
}
_receiveTimeoutTimer.Stop();
return(null);
}
private async Task <MBusFrame> ReadFrameInternal()
{
try
{
int firstChar = _stream.ReadByte();
if (firstChar == MBus.ShortFrameStart)
{
Logger.LogDebug("Start parsing short frame...");
Thread.Sleep(100);
byte[] shortFrame = new byte[5];
shortFrame[0] = (byte)firstChar;
var bytesRead = await _stream.ReadAsync(shortFrame, 1, 4);
if (bytesRead != 4)
{
Logger.LogDebug($"Could not parse short frame (read bytes {bytesRead}/4)");
return(null);
}
Logger.LogDebug("Short frame in...");
Logger.LogHexIn(shortFrame);
var frame = MBusFrame.FromByteArray(MBusFrameType.ShortFrame, Logger, shortFrame);
return(frame);
}
if (firstChar == MBus.SingleCharFrame)
{
Logger.LogDebug("Ack frame in...");
return(new AckFrame());
}
if (firstChar == MBus.ControlFrameLongFrameStart)
{
Logger.LogDebug("Start parsing long frame...");
Thread.Sleep(200);
byte[] headerBuffer = new byte[4];
headerBuffer[0] = (byte)firstChar;
var bytesRead = await _stream.ReadAsync(headerBuffer, 1, 3);
Logger.LogHexIn(headerBuffer);
if (bytesRead != 3)
{
Logger.LogDebug($"Could not read header...read {bytesRead}/3");
return(null);
}
if (headerBuffer[0] == 0x68 && headerBuffer[0] == headerBuffer[3] &&
headerBuffer[1] == headerBuffer[2])
{
int lengthToRead = headerBuffer[1] + 2; //read with checksum and stop byte
byte[] data = new byte[lengthToRead];
var dataMemory = new Memory <byte>(data);
bytesRead = await _stream.ReadAsync(dataMemory);
Logger.LogHexIn(dataMemory);
if (bytesRead != lengthToRead)
{
Logger.LogDebug($"Invalid length of read data...({bytesRead}/{lengthToRead})");
return(null); //invalid length of data read
}
if (data[data.Length - 1] != 0x16)
{
Logger.LogDebug("Invalid stop byte...");
return(null); //invalid stop byte
}
var packageType = headerBuffer[2] == 3 ? MBusFrameType.ControlFrame : MBusFrameType.LongFrame;
return(MBusFrame.FromSpan(packageType, Logger, headerBuffer.AsSpan(), dataMemory.Span));
}
}
}
catch (IOException ioe)
{
Logger.LogError($"Could not read frame {ioe}", ioe);
Close();
Thread.Sleep(100);
Open();
}
catch (Exception e)
{
Logger.LogError($"Could not read frame {e}", e);
}
return(null);
}