Add RPL Hop-by-Hop option (RFC 6553)

[thvdveld]

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)
• The PR is complete

This adds support for the RPL Option, defined in RFC 6553, which is used in the Hop-by-Hop options.

[codecov]

Codecov Report

Merging #3998 (4a85ff8) into master (5a2dbf0) will decrease coverage by 0.01%.
Report is 1 commits behind head on master.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3998      +/-   ##
==========================================
- Coverage   81.95%   81.94%   -0.01%     
==========================================
  Files         331      331              
  Lines       76647    76664      +17     
==========================================
+ Hits        62813    62823      +10     
- Misses      13834    13841       +7     

Files	Coverage Δ
scapy/layers/inet6.py	88.60% <100.00%> (+0.06%)	⬆️

... and 6 files with indirect coverage changes

[guedou]

This looks good to me. Could you explain us what the parsing of the sub-TLV should be?

[thvdveld]

The RFC says that there are no sub-TLV's defined in that RFC.

The action taken by using the RPL Option and the potential set of
sub-TLVs carried within the RPL Option MUST be specified by the RFC
of the protocol that uses that option. No sub-TLVs are defined in
this document. A RPL device MUST skip over any unrecognized sub-TLVs
and attempt to process any additional sub-TLVs that may appear after.

I hope this answers your question.

[gpotter2]

Hi ! Would you mind rebasing against master? Thanks

[guedou]

@thvdveld the linting issues will appear in the Checks tab. Locally, you can install https://tox.wiki/en/4.11.4/ and launch tox flake8 to reproduce the CI behavior.

[thvdveld]

@guedou Thank you!

[gpotter2]

Very sorry for the delay !