mrambossekandClaude Opus 5
d9ee8bc2ae
The per-network attribution fix worked — the finding named rmnet_data1 instead of the IPv4-only wifi — and immediately exposed a worse problem underneath. Cellular's result was `ok: false` because binding a socket to it failed with EPERM, so no echo request was ever sent; the finding then reported "IPv6 is configured, but ICMPv6 gets no reply" about a network the app had never pinged. That is an assertion about the user's carrier with nothing behind it. `attempted` now travels beside `ok`, set only once sendto has returned, and the finding requires both. Failing to bind is a fact about this app's permissions on this device; it says nothing about the network, and the two must not share a boolean. Verified on hardware with a VPN active: every network fails to bind with EPERM, nothing is sent, and no ICMPv6 finding is emitted — where the previous build would have blamed the carrier. Recorded in build-status: Android blocks per-network binding entirely while a VPN holds the default route, so per-network measurement is unavailable to anyone with one connected. That needs a deliberate answer rather than a silently green run. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Echolot app
The production Android client (spec). Native Kotlin + Jetpack Compose. Multi-module; built bottom-up from a verifiable protocol spine.
Modules
| Module | Type | Status |
|---|---|---|
core-protocol |
pure Kotlin/JVM | done — client half of probe-protocol.md, verified live against the server |
core-measurement |
pure Kotlin/JVM | planned — measurement-schema.md types |
core-probe |
Android lib | planned — app-tier probes, ported from echolot-prober |
core-shizuku |
Android lib | planned — dual-path executor (UserService + newProcess fallback) |
app |
Android app | planned — Compose UI |
core-protocol is deliberately Android-free so it builds and unit-tests on any JDK (no Android
SDK) and can run integration tests against a live server.
core-protocol
Implements the control plane (SPKI-pinned enrollment/profile/sessions via HttpsURLConnection —
Android-API-1 compatible, hostname verification off because trust is the pin), the HKDF-SHA256
session-key schedule, and the binary ELT1 UDP data plane (HMAC gate, ECHO + observation block,
MTU probe) — byte-compatible with the Go server.
./gradlew :core-protocol:test # unit tests (crypto vectors, wire round-trip)
scripts/test-fmr.sh # live end-to-end test against the deployed server
test-fmr.sh mints an enrollment token over SSH, enrolls via the public control plane, computes
the SPKI pin from the served cert, and runs LiveServerTest — proving the client speaks the wire
protocol to the real server (enroll → profile → session → echo+observation → MTU → observations).
The live test self-skips when ECHOLOT_LIVE_* env vars are absent, so unit runs and CI stay green
offline.