Russell Ballestrini
17ba25f9cb
reportPath used to print 'you A:B ↔ peer C:D' in path-status and the log, exposing both participants' real IP addresses to anyone glancing at the screen. Show DIRECT vs RELAYED and the candidate types (host/srflx/relay) only; addresses are gone. CLAUDE.md gains a 'Web UI privacy — never display peer IPs' rule so this does not regress.
156 lines
6.9 KiB
Markdown
156 lines
6.9 KiB
Markdown
# Agent Blackops
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This repo is operated by **agent blackops** — ml agent for fox/timehexon on the unsandbox/unturf/permacomputer platform.
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## Identity
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Full shard: `~/git/unsandbox.com/blackops/BLACKOPS.md`
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## Rules
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- I propose, fox decides. Unsure = ask. Can't ask = stop.
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- No autonomous ops decisions. No destructive commands without explicit instruction.
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- Fail-closed. Cleanup crew, not demolition.
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- Check the time every session. Gaps are information.
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- DRY in context — single source of truth, no sprawl.
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- Never say "AI" — always say "machine learning."
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- Prefer "defect" over "bug."
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## Orientation
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```bash
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date -u
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pwd
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git log --oneline -5
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git status
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```
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Then ask fox what the mission is.
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## Zebra Report System
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**Concept**: covert bidirectional communication channel using browser tab volume as the modulation medium — dial-up modem principles, userland only, no kernel involvement, no network stack.
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### Collaborators & Stakeholders
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| Handle | Role |
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|--------|------|
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| **foxhop** | fox — handler, operator, TimeHexOn |
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| **brackishbert** | collaborator |
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| **SEW** | collaborator |
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| **russell@unturf** | Russell Ballestrini — unturf founder, permacomputer manifesto, `ago` library |
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| **TimeHexOn** | oracle platform — primary deployment target |
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| **groupr** | related project |
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### How it works
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PulseAudio exposes each browser tab as a separate sink input, visible and controllable in `pavucontrol`. Volume is settable per-tab in userland with no kernel involvement. Each tab has a range of **0–100** (101 discrete levels — 101 dalmatians).
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By modulating volume at a consistent rate (bauds), two sides can exchange data:
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- **transmitter**: steps volume through values at a fixed clock rate
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- **receiver**: reads volume at the same clock rate, decodes the steps back to data
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- **bidirectional**: two tabs (or two processes watching different tabs) run opposite directions simultaneously
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### Signal space
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- 101 levels = ~6.66 bits per symbol
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- practical: use power-of-2 subsets — 2 levels (1 bit), 4 levels (2 bits), 64 levels (6 bits)
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- higher symbol depth trades noise margin for throughput
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- low baud rate = high reliability, low throughput (like 300 baud dialup)
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- high baud rate = races PulseAudio update latency
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- measured ceiling on neoblanka: ~1000–1200 baud (PA IPC ~350–400µs avg)
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### Binaries
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| Binary | Description |
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|--------|-------------|
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| `tx` | transmitter — reads stdin, modulates tab volume |
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| `rx` | receiver — reads tab volume, writes decoded bytes to stdout |
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| `chat` | bidirectional chat — two tabs, two threads |
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| `bt` | **Battle Toads** — stereo dual-channel, 2x bandwidth |
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### Project Battle Toads
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One stereo browser tab carries **two independent UART streams** simultaneously — L channel and R channel. PulseAudio's `pa_cvolume` is per-channel; a single `get_sink_input_info` call returns both L and R volumes.
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- TX sets L and R to independent bit values each symbol
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- RX decodes L and R from a single PA poll — no extra IPC cost
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- Net: 2x throughput at same baud rate, same PA polling budget
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- Web carrier upgraded to stereo: two oscillators (440Hz L, 441Hz R) merged into a stereo stream → PA sees `channels=2`
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```bash
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# After opening web/index.html and clicking 'start audio' (stereo tab):
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./bt -T MY_SINK -R THEIR_SINK -b 500
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```
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### Auto-negotiate (handshake protocol)
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RX benchmarks its own PA polling speed and signals the max safe baud to TX. No manual baud matching needed.
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```bash
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./rx -s RX_SINK -t TX_SINK # RX benchmarks, sends offer at 50 baud
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./tx -s TX_SINK -r RX_SINK # TX listens for offer, locks to RX's rate
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```
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Handshake frame: `[0x5A 0x42 0x01 baud_lo baud_hi xor_cksum]` — 6 bytes at 50 baud (~1.2s).
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**Known defect**: 3-way handshake not yet implemented. TX can fire before RX enters receive loop at high baud rates. Fix: RX-ready signal back to TX before data phase.
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### Tools
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- `pactl set-sink-input-volume` — set volume by sink-input index
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- `pactl list sink-inputs` — enumerate tabs, read current volume
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- `pavucontrol` — visual verification of modulation
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- `./tx -l` — list all PA sink inputs with index, volume, channels
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- sink-input index maps to tab; stable within a session
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### Use cases
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- agent-to-agent signaling without touching the filesystem or network stack
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- side-channel between sandboxed browser tab and host process
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- low-bandwidth status heartbeat (alive/dead/mode) at ~1–10 baud
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- covert channel for oracle↔host communication on TimeHexOn
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### Constraints
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- sink-input index resets when tab navigates or crashes — handshake needed on reconnect
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- PA polling latency sets the baud ceiling — benchmark with `./rx -s SINK -t SINK2` before sending
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- stereo (channels=2) required for Battle Toads — open web/index.html, click 'start audio'
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- userland only — survives without root
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- **Operation Voyeur**: all terminal output is public — never pass secrets through these channels unencrypted. The web page does ECDH key exchange + AES-256-GCM before TX.
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### Web UI privacy — never display peer IPs
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`chat.html` and `zebra-audio.html` must never print peer IP addresses or ports
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in the page UI or in any visible log. Our users do not run Wireshark — if it
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is not on the screen, peers cannot dox each other. Candidate types
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(`host`/`srflx`/`relay`) from `pc.getStats()` are abstract and fine to show
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(they tell you direct vs relayed); `loc.address` / `loc.port` /
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`rem.address` / `rem.port` are not. The WebRTC stack already obfuscates host
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candidates via mDNS by default — do not undo that work in the UI.
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### Web page integrity stamping
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Each deployed page (`web/chat.html`, `web/zebra-audio.html`, `web/how-it-works.html`,
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`web/host-your-own.html`) carries a footer with the build date + its own MD5 + SHA-256.
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**Run `make stamp` before deploying any page change** — it sets today's date and
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recomputes the hashes (`web/stamp.js`).
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- A file can't hold its own hash, so the hashes are computed with the two hash
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fields **zeroed**, then written back (same length). Self-consistent and
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idempotent: re-running `make stamp` gives identical hashes unless the content
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changed.
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- The stamp is **static HTML written at build time** — no JavaScript computes or
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injects it in the browser. `stamp.js` is build tooling, never loaded by a page.
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- **Verify a served page**: blank the md5 field to 32 zeros and the sha256 field
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to 64 zeros, then re-hash with `sha256sum`/`md5sum` — must match the footer.
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- **Deploy = push to BOTH repos.** A page change is not live until it lands in
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both. Pushing only the source changes nothing served; pushing only the deploy
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repo orphans the source of truth. Both, every time:
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1. **source** — this repo (`zebra-report`): edit `web/*.html` → `make stamp` →
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commit → **push to origin**.
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2. **served** — `www.unturf.com`: copy the page(s) into
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`~/git/www.unturf.com/zebra-report/` (`chat.html` → `index.html`;
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`zebra-audio.html`, `how-it-works.html`, `host-your-own.html` keep their
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names) → commit → **push to origin**.
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