mrambossekandClaude Opus 5
e695fe7aee
- IcmpProbe: attempt the echo on the default network AND each active network (Network.bindSocket + per-network DNS). Run 1's ping6 EAGAIN was topology (v6 only on cellular), not capability — now the report shows which networks carry which family instead of a bare ERROR. - New traceroute.udp4 (TracerouteProbe): actual UDP traceroute reading ICMP time-exceeded via Os.recvmsg(MSG_ERRQUEUE) with cmsg parsing — reflection per repo convention (API surface exists ~34+). If this returns hops, the C-over-JNI shim is unnecessary on that device. sock_extended_err layout constants documented in OsAbi. - MulticastProbe: 10 s window; meta-query PLUS concrete types (_http._tcp, _googlecast._tcp) — run 1 showed the meta-query alone returning 0 on a network with live services; capture names + failure codes as evidence. - ShizukuProbe: ip monitor window 2s -> 5s, gateway ping in background to provoke a NEIGH transition instead of hoping for ambient churn. 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