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7 commits

Author SHA1 Message Date
Andrew Pimenov
245533f904 add Prometheus/CSV export, auto-diff vs previous run, and --trend
New metrics.py: collect_metrics() does the per-section extraction a flat
dict walk can't (latency needs label/host/method, TLS label/host, path hops
target/ttl/ip/asn), producing a flat Metric list that render_prometheus()
and render_csv() each format in about 15 lines. Simpler than treating them
as two separate renderers. FORMAT_EXTENSIONS gained "prom"/"csv" as the
single wiring point both parse_formats() and Output._normalize_formats()
already key off of.

New history.py finds a previous JSON report for the same ASN by reusing
the exact filename convention exporter.report_filename() already writes,
so the lookup key can't drift from what's on disk. Wired into diagnose()
before write_report() - a compact vs-previous-run summary
(compare.py::render_diff_brief(), new) prints automatically whenever this
run writes JSON and an earlier one exists for the same network; silent on
every other case (first run, prior run wrote no JSON prints one note
instead of guessing). New --no-auto-diff escapes it per run,
history.auto_diff in config disables it entirely.

New trend.py aggregates N saved JSON reports into per-label sparkline
series via --trend N - read-only, and it doesn't touch the network to find
"this network's" history either: history.latest_key() just reads it off
the newest report filename already on disk.

Growing FORMAT_EXTENSIONS to 5 entries broke three pre-existing tests that
hardcoded the old 3-format set; fixed in this commit.

Live-tested: prom/csv artifacts render correctly, auto-diff fired on a
second run, --trend 3 produced readable output, --compare unaffected.

Part of plans/zesty-zooming-wilkinson.md (gitignored).
2026-08-12 22:10:21 +03:00
Andrew Pimenov
99876103f8 verify TLS certificates and fingerprint them for MITM detection
tls_context() now defaults to real certificate verification instead of the
tool's original always-CERT_NONE posture; measure_tls() only falls back to
unverified on ssl.SSLCertVerificationError, retiming the retry since the
failed attempt's duration isn't representative. This is also the only way
to get subject/issuer/notAfter at all - getpeercert() returns {} for a
chain that never validated.

Every TLS result now carries cert_sha256 (SHA-256 of the full DER cert, not
the SPKI - that would need the cryptography package, a dependency this
doesn't need), cert_issuer, cert_days_remaining, and the long-dead
cert_verified field finally gets written. New tls.pinned_fingerprints
config (host -> expected hash, capped and hex-validated) drives three new
findings: a pin mismatch is crit, an unpinned validation failure is warn,
an expiring cert is warn.

Live-tested with --tls against real Cloudflare/Google endpoints - verified
handshake, correct issuer and expiry both times.

Part of plans/zesty-zooming-wilkinson.md (gitignored).
2026-08-12 21:48:36 +03:00
Andrew Pimenov
84c3dffbce detect captive portals up front, flag off-country speedtest servers
New Phase 0 in diagnose(): three generate_204-style probes run before every
other module, using detect-and-tag rather than short-circuit — a portal is
rarely total (DNS/ICMP often pass while only HTTP is intercepted), and an
aborted run would look identical to a dead link. On detection every later
phase still runs, tagged with a crit finding and a banner at the top of the
report.

Caught live before it shipped: detectportal.firefox.com/success.txt (one of
the original three default check URLs) returns 200 "success" on a genuinely
clean connection, which the generate_204-shaped classifier misread as a
portal redirect. Swapped for a second real generate_204 endpoint instead of
teaching the classifier a second success shape.

Also redesigned the speedtest server geo-sanity check after checking the
bundled Ookla CLI's actual JSON output: its server object never carries
lat/lon (documented schema, not a version gap), so speed.server_other_country
compares server_country against the client's own country instead of a
haversine distance that no tier can actually supply.

Part of plans/zesty-zooming-wilkinson.md (gitignored).
2026-08-12 21:36:54 +03:00
Andrew Pimenov
c63c179b57 add config sections for TLS, prefix bench, DPI check, DNS advanced, path diversity 2026-08-09 17:37:48 +03:00
Andrew Pimenov
4ffc39906b add --format/--ru/--json flags to control which report artifacts get written
Every run used to write all three files (en.md, ru.md, json) unconditionally.
Default is now English Markdown only, sourced from output.formats in
config.yaml; --format/--ru/--json pick exactly what a run writes, and any
explicit --format replaces the default rather than adding to it (all/none
supported). write_report() moved from a fixed 3-positional-arg signature to
a {format: text} mapping so writes are conditional instead of always-three.
The en/ru Markdown cross-link header is now only set when both languages are
actually being written.
2026-08-09 13:00:13 +03:00
Andrew Pimenov
483989c1bc rename package netcheck to netsleuth (name taken on pypi) 2026-08-09 11:43:00 +03:00
Andrew Pimenov
ecf570a5b2 config: pydantic-settings loader with env > .env > yaml precedence 2026-08-08 21:38:12 +03:00