Add STUN Support

[oborichkin]

• Added basic support for Binding method of STUN (RFC 3489).
• Added attributes:
  • USERNAME
  • MESSAGE-INTEGRITY
  • XOR-MAPPED-ADDRESS
  • USE-CANDIDATE
  • PRIORITY
  • FINGERPRINT
  • ICE-CONTROLLING
  • GOOG-NETWORK-INFO

[p-l-]

Hi @Oborichkin! Could you please rebase against current master for the CI tests?

[oborichkin]

Hi @p-l- !

Could you please rebase against current master for the CI tests?

done!

[p-l-]

This PR seems to break some of the tests (apparently Python 2). Could you have a look?

[jkldgoefgkljefogeg]

Can you make it RFC8489 compliant?

[codecov[bot]]

Codecov Report

Merging #3709 (d02228b) into master (75269fc) will increase coverage by 0.00%. The diff coverage is 82.05%.

@@           Coverage Diff           @@
##           master    #3709   +/-   ##
=======================================
  Coverage   86.07%   86.08%           
=======================================
  Files         298      299    +1     
  Lines       67942    68020   +78     
=======================================
+ Hits        58484    58552   +68     
- Misses       9458     9468   +10     

Impacted Files	Coverage Δ
scapy/contrib/stun.py	82.05% <82.05%> (ø)
scapy/arch/windows/__init__.py	67.73% <0.00%> (-0.57%)	:arrow_down:
scapy/fields.py	90.85% <0.00%> (+0.05%)	:arrow_up:
scapy/automaton.py	74.12% <0.00%> (+0.11%)	:arrow_up:
scapy/layers/ntp.py	84.82% <0.00%> (+0.27%)	:arrow_up:
scapy/supersocket.py	60.36% <0.00%> (+0.30%)	:arrow_up:
scapy/layers/l2.py	76.71% <0.00%> (+0.68%)	:arrow_up:

[oborichkin]

This PR seems to break some of the tests (apparently Python 2). Could you have a look?

Yep, done

[oborichkin]

Can you make it RFC8489 compliant?

Oops, wrote a wrong RFC number in PR. It is RFC 8489 compliant