mrambossekandClaude Opus 5
9ee7d554a6
Four passive collectors join long mode: SSDP (passive NOTIFY plus paced M-SEARCH from the capture socket, so unicast replies land in the same capture), LLMNR, NetBIOS-NS and WS-Discovery. All are periodic and sparse by nature, which is exactly why they belong to a window rather than a probe - a thirty-second run mostly hears silence and would report an empty network as confidently as a quiet one. NetBIOS reports unsupported on the app tier and says why: UDP 137 is privileged. The decoder and evidence shape are tested and waiting for the Shizuku tier; a recorded reason beats a missing test. Silence without a multicast lock or a group join is PARTIAL, never OK - that case is a fact about this app, not about the network. Hostnames, banners and device UUIDs are classified in core-privacy so the anonymizer treats them like every other identifier rather than letting a neighbour's device model ride out in an upload. No active WSD Probe and no NBSTAT sweep: the app listens to what a network broadcasts, it does not announce itself to strangers or interrogate its neighbours. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Echolot
Free software for detecting and debugging local network issues from an Android phone — built for people who actually know what a neighbor table is.
Most "wifi analyzer" apps show you signal bars. Echolot aims at the layer where home and office networks actually break: duplicate DHCP servers, broken IPv6 RAs, MTU black holes, NAT64 weirdness, multicast that dies at the AP, DNS that answers differently than it should. It records what it observed, separates observation from interpretation, and exports the whole run so you can argue with it later.
Status: pre-release. The capability prober runs on real hardware; the production app and the probe server are not built yet.
Repository layout
docs/ design docs — the contract for everything below
echolot-prober/ capability prober: validates the no-root feasibility matrix on real devices
The Go probe server and the production app land here as siblings.
Design docs
The three specs are draft-complete and reviewed; treat them as the contract.
| Doc | What it defines |
|---|---|
| docs/feature-catalog-and-feasibility.md | Full feature list + the no-root feasibility matrix |
| docs/measurement-schema.md | Archived/exportable measurement JSON (observation vs finding, two-clock rule, anonymization) |
| docs/probe-protocol.md | Client↔server wire protocol (pinned TLS control plane, binary UDP data plane, STUN, canary DNS) |
| docs/build-status.md | Running log of decisions and next steps |
Privilege tiers
Every result records which tier produced it:
app— no root, no special setup. The bulk of the functionality.shizuku— ADB-shell privileges via wireless pairing, no root. Shipped in v1.root— future optional module.
Licensing
| Part | License | Why |
|---|---|---|
| All code (app, prober, server) | GPL-3.0-or-later | The value here is the platform-API research; copyleft keeps derivative apps free |
docs/ (the specs) |
CC-BY-4.0 | A wire protocol and a measurement format should be implementable by anyone, without license anxiety |
Full texts: LICENSE (GPLv3) and docs/LICENSE (CC BY 4.0).
Sources carry SPDX-License-Identifier headers.
If you want to build a compatible server or client, the protocol and schema docs are deliberately permissive — go ahead.
Building
See echolot-prober/README.md. Short version, from echolot-prober/:
echo "sdk.dir=/path/to/Android/sdk" > local.properties
./gradlew :app:assembleDebug