QUIC: add pure-Python long-header helpers + Decoder plugin #153
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Motivation: QUIC (RFC 9000) is common on UDP/443. This adds a small, dependency-free core for long-header parsing and a Dshell Decoder that uses it.
What’s included:
dshell/plugins/quic/_helpers.py:is_quic_long_header(),parse_quic_long_header()(returnsQuicLongHeaderMetawithheader_form="long", version, DCID, SCID). Defensive; never raises.tests/test_quic_helpers.py:3 unit tests (happy-path, non-QUIC rejection, malformed length safety). No external deps → CI-friendly.dshell/plugins/quic/quic.py:Dshell Decoder that filters UDP ports (default 443;--portsto override) and writes rows:ts,src,sport,dst,dport,version,dcid,scid,cid_len.Design notes: Keep helpers import-light so unit tests run on any CI; the Decoder integrates with Dshell’s pipeline and uses the helpers internally.
Local results:
python -m pytest -q tests/test_quic_helpers.py→ all tests pass.