Hsfz: Improve incorrect tester field naming.

[antoniovazquezblanco]

Checklist:

• If you are new to Scapy: I have checked CONTRIBUTING.md (esp. section submitting-pull-requests)
• I squashed commits belonging together
• I added unit tests or explained why they are not relevant
• I executed the regression tests (using cd test && ./run_tests or tox)
• If the PR is still not finished, please create a Draft Pull Request

Based on https://gitlab.com/LarsVoelker/wireshark/-/commit/3c4a5165a69d371d2abae1f271fbd806f9a31819, I improved the naming of the fields for this particular command.

The protocol is getting a little bit more complex and it may be time for splitting it into layers if it keeps growing. Let me know what do you think about that and I may open a new PR with that changes if you think it may help.

Thanks!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.98%. Comparing base (d6a25bb) to head (cd7085c).
⚠️ Report is 7 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4818      +/-   ##
==========================================
- Coverage   80.98%   80.98%   -0.01%     
==========================================
  Files         365      365              
  Lines       89112    89114       +2     
==========================================
  Hits        72167    72167              
- Misses      16945    16947       +2     

Files with missing lines	Coverage Δ
scapy/contrib/automotive/bmw/hsfz.py	63.72% <100.00%> (+0.72%)	⬆️

... and 6 files with indirect coverage changes

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[Copilot]

Pull Request Overview

This PR improves the field naming in the HSFZ (BMW's proprietary automotive protocol) packet structure to better reflect the semantics of different control frames. Based on a Wireshark commit, the change clarifies that control type 0x40 (incorrect_tester_address) frames contain "expected" and "received" address fields rather than generic "source" and "target" fields.

• Renamed generic address fields to more descriptive names for control type 0x40 frames
• Split address field logic into separate methods for different control types
• Updated test assertions to match the new field names

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
scapy/contrib/automotive/bmw/hsfz.py	Added new conditional fields and split address detection logic for better semantic accuracy
test/contrib/automotive/bmw/hsfz.uts	Updated test assertions to use new field names for control type 0x40 frames

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[polybassa]

Thanks for the PR. For now, I would not split the layers.