Support Inband Flow Analyzer (IFA)

[jingfeihu]

1.support IFA over ipv4/ipv6 + udp/tcp/vxlan/gre
2.add IFA unit tests

[codecov]

Codecov Report

❌ Patch coverage is 98.76543% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.37%. Comparing base (1346522) to head (739d314).
⚠️ Report is 272 commits behind head on master.

Files with missing lines	Patch %	Lines
scapy/contrib/ifa.py	98.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4235      +/-   ##
==========================================
- Coverage   81.62%   81.37%   -0.25%     
==========================================
  Files         359      342      -17     
  Lines       86052    85854     -198     
==========================================
- Hits        70237    69862     -375     
- Misses      15815    15992     +177     

Files with missing lines	Coverage Δ
scapy/layers/inet.py	72.45% <100.00%> (+0.61%)	⬆️
scapy/layers/l2.py	83.49% <100.00%> (-0.26%)	⬇️
scapy/contrib/ifa.py	98.00% <98.00%> (ø)

... and 271 files with indirect coverage changes

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