Siavash Sameni 4af7c5f94c
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fix: AudioRing cursor desync + capture thread use-after-free
AudioRing (reader-detects-lap architecture):
- Writer NEVER touches read_pos — fixes SPSC invariant violation
- Reader self-corrects when lapped (snaps read_pos forward)
- Power-of-2 capacity (16384 = 341ms) with bitmask indexing
- Added overflow_count and underrun_count diagnostics
- Wired ring health into engine stats and periodic logging

Capture thread use-after-free (drain latch):
- Added CountDownLatch(2) to AudioPipeline
- Audio threads count down after exiting their loops
- teardown() awaits latch (200ms timeout) before destroy()
- Guarantees no in-flight JNI calls when native handle is freed
- stopAudio() no longer nulls pipeline (teardown handles it)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-06 13:28:34 +04:00

WarzonePhone

Custom lossy VoIP protocol built in Rust. E2E encrypted, FEC-protected, adaptive quality, designed for hostile network conditions.

Quick Start

# Build
cargo build --release

# Run relay
./target/release/wzp-relay --listen 0.0.0.0:4433

# Send a test tone
./target/release/wzp-client --send-tone 5 relay-addr:4433

# Web bridge (browser calls)
./target/release/wzp-web --port 8080 --relay 127.0.0.1:4433 --tls
# Open https://localhost:8080/room-name in two browser tabs

Architecture

See docs/ARCHITECTURE.md for the full system architecture with Mermaid diagrams covering:

  • System overview and data flow
  • Crate dependency graph (8 crates)
  • Wire formats (MediaHeader, MiniHeader, TrunkFrame, SignalMessage)
  • Cryptographic handshake (X25519 + Ed25519 + ChaCha20-Poly1305)
  • Identity model (BIP39 seed, featherChat compatible)
  • Quality profiles (GOOD/DEGRADED/CATASTROPHIC)
  • FEC protection (RaptorQ with interleaving)
  • Adaptive jitter buffer (NetEq-inspired)
  • Telemetry stack (Prometheus + Grafana)
  • Deployment topology

Features

  • 3 quality tiers: Opus 24k (28.8 kbps) / Opus 6k (9 kbps) / Codec2 1200 (2.4 kbps)
  • RaptorQ FEC: Recovers from 20-100% packet loss depending on tier
  • E2E encryption: ChaCha20-Poly1305 with X25519 key exchange
  • Adaptive jitter buffer: EMA-based playout delay tracking
  • Silence suppression: VAD + comfort noise (~50% bandwidth savings)
  • ML noise removal: RNNoise (nnnoiseless pure Rust port)
  • Mini-frames: 67% header compression for steady-state packets
  • Trunking: Multiplex sessions into batched datagrams
  • featherChat integration: Shared BIP39 identity, token auth, call signaling
  • Prometheus metrics: Relay, web bridge, inter-relay probes
  • Grafana dashboard: Pre-built JSON with 18 panels

Documentation

Document Description
ARCHITECTURE.md Full system architecture with diagrams
TELEMETRY.md Prometheus metrics specification
INTEGRATION_TASKS.md featherChat integration tracker
WZP-FC-SHARED-CRATES.md Shared crate strategy
grafana-dashboard.json Importable Grafana dashboard

Binaries

Binary Description
wzp-relay Relay daemon (SFU room mode, forward mode, probes)
wzp-client CLI client (send-tone, record, live mic, echo-test, drift-test, sweep)
wzp-web Browser bridge (HTTPS + WebSocket + AudioWorklet)
wzp-bench Component benchmarks

Linux Build

./scripts/build-linux.sh --prepare   # Create Hetzner VM + install deps
./scripts/build-linux.sh --build     # Build release binaries
./scripts/build-linux.sh --transfer  # Download to target/linux-x86_64/
./scripts/build-linux.sh --destroy   # Delete VM

Tests

cargo test --workspace   # 272 tests

License

MIT OR Apache-2.0

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