public IAm(byte[] apdu)
{
int len = 2;
/* OBJECT ID - BacNetObject */
BacNetTag deviceTag = new BacNetTag(apdu, len, ref len);
if (deviceTag.Number != (int)BacNetEnums.BACNET_APPLICATION_TAG.BACNET_APPLICATION_TAG_OBJECT_ID)
{
throw new Exception("Device Id tag is missed.");
}
deviceObject = new BacNetObject(apdu, len, ref len);
if (deviceObject.ObjectType != BacNetEnums.BACNET_OBJECT_TYPE.OBJECT_DEVICE)
{
throw new Exception("Device object is missed.");
}
/* MAX APDU - uint */
BacNetTag maxLengthTag = new BacNetTag(apdu, len, ref len);
if (maxLengthTag.Number != (int)BacNetEnums.BACNET_APPLICATION_TAG.BACNET_APPLICATION_TAG_UNSIGNED_INT)
{
throw new Exception("Max APDU length tag is missed.");
}
MaxApduLength = new BacNetUInt(apdu, len, maxLengthTag.Length, ref len);
/* Segmentation - enum */
BacNetTag segmentationTag = new BacNetTag(apdu, len, ref len);
if (segmentationTag.Number != (int)BacNetEnums.BACNET_APPLICATION_TAG.BACNET_APPLICATION_TAG_ENUMERATED)
{
throw new Exception("Segmentation APDU tag is missed.");
}
BacNetEnumeration segmentation = new BacNetEnumeration(apdu, len, segmentationTag.Length, ref len);
if (segmentation.Value > (int)BacNetEnums.BACNET_SEGMENTATION.MAX_BACNET_SEGMENTATION)
{
throw new Exception("Segmentation error.");
}
BacNetEnums.BACNET_SEGMENTATION tSegmentation;
if (BacNetEnums.BACNET_SEGMENTATION.TryParse(segmentation.Value.ToString(), out tSegmentation))
{
SegmentationSupported = tSegmentation;
}
/* Vendor ID - UShort */
BacNetTag vendorTag = new BacNetTag(apdu, len, ref len);
if (vendorTag.Number != (int)BacNetEnums.BACNET_APPLICATION_TAG.BACNET_APPLICATION_TAG_UNSIGNED_INT)
{
throw new Exception("Vendor Id tag is missed.");
}
VendorId = new BacNetUInt(apdu, len, vendorTag.Length, ref len);
}
public static object GetAppTagValue(byte[] apdu, int startIndex, BacNetTag metaTag, ref int len)
{
object res = null;
switch (metaTag.Number)
{
case 1: //UNSIGNED_INT
var boolValue = new BacNetBool(metaTag);
res = boolValue;
break;
case 2: //UNSIGNED_INT
var uIntValue = new BacNetUInt(apdu, len, metaTag.Length, ref len);
res = uIntValue;
break;
case 3: //SIGNED_INT
var intValue = new BacNetInt(apdu, len, metaTag.Length, ref len);
res = intValue;
break;
case 4: //REAL
var realValue = new BacNetReal(apdu, len, metaTag.Length, ref len);
res = realValue;
break;
case 5: //DOUBLE
var doubleValue = new BacNetDouble(apdu, len, metaTag.Length, ref len);
res = doubleValue;
break;
case 7: //CHARACTER STRING
var str = new BacNetString(apdu, len, metaTag.Length, ref len);
res = str;
break;
case 9: //ENUMERATION
var enumValue = new BacNetEnumeration(apdu, len, metaTag.Length, ref len);
res = enumValue;
break;
case 11: //TIME
var time = new BacNetTime(apdu, len, ref len);
res = time;
break;
case 12: //OBJECT IDENTIFIER
var obj = new BacNetObject(apdu, len, ref len);
res = obj;
break;
}
return(res);
}
public ErrorAck(byte[] apdu)
{
if (apdu.Length > 2)
{
InvokeId = apdu[1];
ServiceChoise = apdu[2];
}
int len = 3;
//Error class
BacNetTag errorClassTag = new BacNetTag(apdu, len, ref len);
if (errorClassTag.Class)
{
throw new Exception("Reject.Invalid_tag");
}
BacNetEnumeration errorClass = new BacNetEnumeration(apdu, len, errorClassTag.Length, ref len);
if (errorClass.Value > (int)BacNetEnums.BACNET_ERROR_CLASS.MAX_BACNET_ERROR_CLASS)
{
throw new Exception("Error class error.");
}
BacNetEnums.BACNET_ERROR_CLASS tErrorClass;
if (BacNetEnums.BACNET_ERROR_CLASS.TryParse(errorClass.Value.ToString(), out tErrorClass))
{
ErrorClass = tErrorClass;
}
//Error code
BacNetTag errorCodeTag = new BacNetTag(apdu, len, ref len);
if (errorCodeTag.Class)
{
throw new Exception("Reject.Invalid_tag");
}
BacNetEnumeration errorCode = new BacNetEnumeration(apdu, len, errorCodeTag.Length, ref len);
if (errorCode.Value > (int)BacNetEnums.BACNET_ERROR_CODE.MAX_BACNET_ERROR_CODE)
{
throw new Exception("Error class error.");
}
BacNetEnums.BACNET_ERROR_CODE tErrorCode;
if (BacNetEnums.BACNET_ERROR_CODE.TryParse(errorCode.Value.ToString(), out tErrorCode))
{
ErrorCode = tErrorCode;
}
}
