Cannot create diameter application with custom application ID

[ofraiwan]

Specifying an application with an ID other than those defined in bromelia/constants/app_ids.py will result in an error.

The same occurs if overwritten in the DiameterHeader application_id attribute.

[heimiricmr]

Hi @ofraiwan,

Once again, thanks for your feedback.

The module bromelia/definitions.py contains all IANA’s definitions. They are used by the __repr__ method in order to print the Application Id properly. Bromélia provides only constants for Application Ids you just mentioned. However, you may set it up with its integer value representation.

See it below. For example, 3GPP Sh is defined as a constant, but 3GPP Re interface is not defined. Despite that, you may change the application_id attribute with no worries. In case an Application Id was not defined in IANA’s webpage, its representation will return “Unknown”.

>>> from bromelia.base import DiameterHeader
>>> header = DiameterHeader()
>>> header
<Diameter Header: Unknown [] REQ|PXY, 0 [Diameter common message]>
>>> header.application_id = 16777217
>>> header
<Diameter Header: Unknown [] REQ|PXY, 16777217 [3GPP Sh]>
>>> header.application_id = 16777218
>>> header
<Diameter Header: Unknown [] REQ|PXY, 16777218 [3GPP Re]>
>>> header.application_id = 99999999
>>> header
<Diameter Header: Unknown [], Unknown []>

Could you please give more details on what you mean by “will result in an error”?

Cheers!

[ofraiwan]

@heimiricmr

This is the exception raised when you assign a custom value to DiameterHeader.application_id

venv/lib/python3.9/site-packages/bromelia/bromelia.py", line 504, in send_message
worker = self.associations[application_id]
KeyError: b\'\\x00\\x00\\x00\\x04\'\n

The following exception is raised if you specified a custom code in the config file:

File "/venv/lib/python3.9/site-packages/bromelia/bromelia.py", line 259, in __init__
    self.configs = _convert_file_to_config(self.config_file, globals())
  File "/venv/lib/python3.9/site-packages/bromelia/_internal_utils.py", line 281, in _convert_file_to_config
    application["app_id"] = variables_dictionary[app_id]
KeyError: 4