mrambossekandClaude Opus 5
6ddf013dfe
- Code: GPL-3.0-or-later (LICENSE, SPDX headers on all .kt/.aidl). Specs in docs/: CC-BY-4.0 (docs/LICENSE). Rationale in build-status.md; server decided GPL (not AGPL). - Root README for the public repo. - web/: Cloudflare Worker site for echo-lot.app. /apk resolves the newest APK from the Gitea latest-release API at request time (edge-cached 5 min), so tagging a release is the only publish step. /fdroid, /source, and a manual DOWNLOAD_URL fallback are wrangler vars. - .gitea/workflows/release.yml: tag-driven (v*) signed semver APK builds for the future production app in echolot-app/. Parked; the prober is deliberately not CI-built. - Fix UserService.kt: drop the explicit secondary constructor that conflicted with the implicit primary (never compiled before — first local build caught it). Prober now builds: :app:assembleDebug OK. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
69 lines
3.7 KiB
Markdown
69 lines
3.7 KiB
Markdown
# Echolot — context for Claude Code
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This repo is the **capability prober** for the Echolot project: an F/OSS Android app for detecting
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and debugging local network issues (target audience: network engineers). The prober validates the
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no-root feasibility matrix on real hardware before the production app is built.
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## Project facts
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- **Name:** Echolot. Domain echo-lot.app. URI scheme `echolot://`. Namespace `app.echo_lot.*`
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(hyphen→underscore; appIds/packages can't contain hyphens). Prober appId: `app.echo_lot.prober`.
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- **Stack:** native Kotlin + Jetpack Compose. No Flutter (all value is in platform APIs;
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Flutter would be a Dart skin over a full Kotlin app + F-Droid build friction).
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- **Tiers:** `app` (no root), `shizuku` (ADB-shell privileges via wireless pairing, shipped in v1),
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`root` (future module). Every result records which tier produced it.
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- **License:** code is **GPL-3.0-or-later** (`LICENSE`), the specs in `docs/` are **CC-BY-4.0**
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(`docs/LICENSE`). New source files get the two-line SPDX header the existing ones carry.
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The server, when it lands, is GPL too — not AGPL (see `docs/build-status.md` for the reasoning).
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## Design docs (source of truth, in `docs/`)
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- `docs/feature-catalog-and-feasibility.md` — full feature list + no-root feasibility matrix.
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- `docs/measurement-schema.md` — the archived/exportable measurement JSON format (observation vs
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finding separation, two-clock rule, columnar trains, anonymization types).
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- `docs/probe-protocol.md` — client↔server wire protocol (pinned-TLS control plane, binary UDP data
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plane with anti-amplification HMAC, STUN, canary DNS reference records).
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- `docs/build-status.md` — running log of decisions, what is delivered, and the next steps.
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The three specs are draft-complete and user-reviewed; treat them as the contract. `build-status.md`
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is the mutable one — update it as work lands.
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Keep prober result IDs aligned with the measurement-schema test-type registry.
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## Layout
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Monorepo. The prober is one deliverable; the Go server and the production app land as siblings.
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```
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docs/ design docs (above) — apply repo-wide, not just to the prober
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echolot-prober/ the capability prober (self-contained Gradle build)
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app/src/main/java/app/echo_lot/prober/
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MainActivity.kt Compose host, runs probes sequentially
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probe/ Probe interface + all app-tier probes + OS ABI helper
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shizuku/ AIDL UserService + ShizukuRunner (shell command exec)
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export/Report.kt JSON report + share intent
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ui/ProberScreen.kt result cards colored by verdict
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```
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## Conventions
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- Every probe returns a `ProbeResult` — never throws to the caller (MainActivity wraps anyway).
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- Uncertain OS API paths (getsockoptInt, recvmsg, nat64Prefix) are reached via reflection/runCatching
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and reported, not assumed — the prober's purpose is to discover what exists.
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- Hardcoded Linux sockopt ABI numbers live in `OsAbi.kt` with rationale; do not "fix" them to
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OsConstants names that don't exist.
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## Build
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From `echolot-prober/`: `./gradlew :app:assembleDebug` (needs local Android SDK; set `sdk.dir` in
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`echolot-prober/local.properties`). The Gradle build is rooted there, not at the repo root.
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First build downloads AGP/Compose/Shizuku from Google Maven + Maven Central.
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## Likely next steps
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1. Run on physical devices; collect JSON reports across Android versions/vendors.
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2. If `trace.errqueue_reachable` is PARTIAL, add the C-over-JNI errqueue shim (recvmsg + cmsg parse)
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as a `:native` module and a real `traceroute.udp4` probe.
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3. Fold the confirmed capabilities + Shizuku dump-format samples back into the production
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`core-probe` / `core-shizuku` modules.
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