oxedyne/fe2o3/fe2o3_shield/TODO.md
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| 1 | # TODO.md - Fe2o3 Shield Development Status |
| 2 | |
| 3 | ## ✅ Completed Core Features |
| 4 | |
| 5 | ### Protocol Implementation |
| 6 | - [x] **3-stage handshake protocol** - Complete implementation with HReq1/HResp1/HReq2/HResp2/HReq3/HResp3 messages |
| 7 | - [x] **UDP packet structure** - Header, payload, validation artefacts with 1,400-byte buffer |
| 8 | - [x] **Message chunking system** - Automatic splitting for messages >1,500 bytes into 1,000-byte chunks |
| 9 | - [x] **Packet assembly engine** - Multi-packet message reconstruction with state tracking |
| 10 | - [x] **Message type system** - Complete enum definitions and serialisation support |
| 11 | |
| 12 | ### Security Features |
| 13 | - [x] **Proof-of-work validation** - Dynamic difficulty adjustment (0-30 zero bits) |
| 14 | - [x] **Digital signature support** - RSA, ECDSA, EdDSA with public key distribution |
| 15 | - [x] **Address-based DoS protection** - Monitor → Throttle → Blacklist state progression |
| 16 | - [x] **Rate limiting** - 30 requests/second baseline with configurable thresholds |
| 17 | - [x] **Time-bounded PoW** - 10-minute validation horizon with replay protection |
| 18 | - [x] **Blacklisting system** - 30 minutes to 3 days duration with randomisation |
| 19 | |
| 20 | ### Cryptographic System |
| 21 | - [x] **Flexible scheme selection** - Pluggable encryption, signing, hashing implementations |
| 22 | - [x] **KEM key exchange** - Session key derivation for forward secrecy |
| 23 | - [x] **Session encryption** - AES-GCM, ChaCha20-Poly1305 support |
| 24 | - [x] **PoW hashing** - SHA-256, BLAKE3, argon2 implementations |
| 25 | - [x] **Generic wire schemes** - Type-safe cryptographic component selection |
| 26 | |
| 27 | ### Infrastructure |
| 28 | - [x] **Configuration management** - Runtime context and parameter tuning |
| 29 | - [x] **Error handling system** - fe2o3_core integration with Outcome<T> pattern |
| 30 | - [x] **Lock handling macros** - RwLock and Mutex abstractions for concurrent access |
| 31 | - [x] **Guard system architecture** - Address and user-based protection layers |
| 32 | - [x] **ShardMap implementation** - Concurrent data structure for scalability |
| 33 | |
| 34 | ## 🚧 In Progress / Partial Implementation |
| 35 | |
| 36 | ### Application Layer |
| 37 | - [⚠️] **REPL interface** - Basic structure exists, needs enhanced command set |
| 38 | - [⚠️] **TUI components** - Foundation present, requires polish and features |
| 39 | - [⚠️] **Server wrapper** - High-level API partially implemented |
| 40 | - [⚠️] **Command syntax parsing** - Core parsing done, needs extended command support |
| 41 | |
| 42 | ### Testing & Validation |
| 43 | - [⚠️] **Integration tests** - Basic test structure, needs comprehensive coverage |
| 44 | - [⚠️] **Simulation framework** - o3db integration present, needs scenario expansion |
| 45 | - [⚠️] **Protocol validation** - Packet validation complete, end-to-end testing needed |
| 46 | - [⚠️] **Performance benchmarks** - Infrastructure present, needs comprehensive metrics |
| 47 | |
| 48 | ### Documentation |
| 49 | - [✅] **Package-level documentation** - Comprehensive crate documentation complete |
| 50 | - [⚠️] **API documentation** - Individual functions documented, needs examples |
| 51 | - [⚠️] **Protocol specification** - Implementation complete, formal spec needed |
| 52 | - [⚠️] **Usage examples** - Basic examples present, needs comprehensive cookbook |
| 53 | |
| 54 | ## 📋 TODO: High Priority |
| 55 | |
| 56 | ### API Stability & Polish |
| 57 | - [ ] **Public API review** - Audit for 1.0 compatibility and ergonomics |
| 58 | - [ ] **Error message improvements** - User-friendly error reporting and context |
| 59 | - [ ] **Configuration validation** - Runtime parameter validation and defaults |
| 60 | - [ ] **Async/await integration** - Full tokio integration for async operations |
| 61 | |
| 62 | ### Testing & Quality Assurance |
| 63 | - [ ] **Comprehensive test suite** - Unit tests for all public functions |
| 64 | - [ ] **Fuzzing harness** - Input validation and crash resistance testing |
| 65 | - [ ] **Property-based testing** - Protocol invariant validation |
| 66 | - [ ] **Load testing framework** - Concurrent connection and DoS simulation |
| 67 | - [ ] **Memory leak detection** - Long-running stability validation |
| 68 | |
| 69 | ### Performance Optimisation |
| 70 | - [ ] **Packet processing optimisation** - Zero-copy where possible |
| 71 | - [ ] **Memory allocation profiling** - Reduce allocation overhead |
| 72 | - [ ] **CPU profiling** - Optimise hot paths in PoW validation |
| 73 | - [ ] **Network buffer tuning** - Optimise UDP buffer management |
| 74 | - [ ] **Concurrent processing** - Parallelise packet validation where safe |
| 75 | |
| 76 | ### Security Enhancements |
| 77 | - [ ] **Formal security audit** - Third-party cryptographic review |
| 78 | - [ ] **Post-quantum migration path** - Clear upgrade strategy for quantum-resistant schemes |
| 79 | - [ ] **Side-channel analysis** - Timing attack resistance validation |
| 80 | - [ ] **DoS simulation** - Comprehensive attack simulation and mitigation testing |
| 81 | |
| 82 | ## 📋 TODO: Medium Priority |
| 83 | |
| 84 | ### Feature Enhancements |
| 85 | - [ ] **Multiple transport support** - TCP fallback for large messages |
| 86 | - [ ] **IPv6 support** - Dual-stack networking implementation |
| 87 | - [ ] **Connection pooling** - Efficient session reuse and management |
| 88 | - [ ] **Bandwidth adaptation** - Dynamic packet size adjustment |
| 89 | - [ ] **Compression support** - Optional payload compression for large messages |
| 90 | |
| 91 | ### Monitoring & Observability |
| 92 | - [ ] **Metrics collection** - Protocol statistics and performance metrics |
| 93 | - [ ] **Logging framework** - Structured logging with configurable levels |
| 94 | - [ ] **Health check endpoints** - Server status and diagnostics |
| 95 | - [ ] **OpenTelemetry integration** - Distributed tracing support |
| 96 | |
| 97 | ### Developer Experience |
| 98 | - [ ] **Examples directory** - Complete usage examples for common patterns |
| 99 | - [ ] **CLI tool improvements** - Enhanced shield binary with more commands |
| 100 | - [ ] **Configuration templates** - Pre-configured setups for common use cases |
| 101 | - [ ] **Docker integration** - Containerisation support and examples |
| 102 | |
| 103 | ## 📋 TODO: Low Priority / Future Enhancements |
| 104 | |
| 105 | ### Advanced Features |
| 106 | - [ ] **Plugin architecture** - Dynamic protocol extension system |
| 107 | - [ ] **Multi-hop routing** - P2P network routing capabilities |
| 108 | - [ ] **NAT traversal** - Hole punching and STUN/TURN integration |
| 109 | - [ ] **Group messaging** - Multicast and broadcast message support |
| 110 | - [ ] **Message persistence** - Optional message queue and storage |
| 111 | |
| 112 | ### Ecosystem Integration |
| 113 | - [ ] **WebAssembly support** - Browser-compatible Shield implementation |
| 114 | - [ ] **Mobile platform support** - iOS/Android compatibility testing |
| 115 | - [ ] **Language bindings** - C, Python, JavaScript FFI interfaces |
| 116 | - [ ] **gRPC compatibility** - Protocol buffer integration option |
| 117 | |
| 118 | ### Research & Experimentation |
| 119 | - [ ] **Alternative consensus mechanisms** - Beyond proof-of-work validation |
| 120 | - [ ] **Quantum key distribution** - QKD integration for ultimate security |
| 121 | - [ ] **Homomorphic encryption** - Privacy-preserving computation support |
| 122 | - [ ] **Zero-knowledge proofs** - Anonymous authentication mechanisms |
| 123 | |
| 124 | ## 🚨 Known Issues & Limitations |
| 125 | |
| 126 | ### Current Limitations |
| 127 | - **Single transport only** - UDP-only implementation, no TCP fallback |
| 128 | - **No IPv6 support** - IPv4-only addressing currently implemented |
| 129 | - **Limited error recovery** - Some failure modes need graceful handling |
| 130 | - **Configuration complexity** - Many parameters require expert knowledge |
| 131 | |
| 132 | ### Technical Debt |
| 133 | - **Code organisation** - Some modules could benefit from refactoring |
| 134 | - **Test coverage gaps** - Not all edge cases have test coverage |
| 135 | - **Documentation consistency** - Some APIs lack consistent documentation style |
| 136 | - **Performance profiling** - Hot paths not fully optimised |
| 137 | |
| 138 | ## 🎯 Release Roadmap |
| 139 | |
| 140 | ### Version 0.6.0 (Next Release) |
| 141 | - [ ] Complete API stability review |
| 142 | - [ ] Comprehensive test suite |
| 143 | - [ ] Performance optimisation pass |
| 144 | - [ ] Documentation completion |
| 145 | |
| 146 | ### Version 0.7.0 (Beta) |
| 147 | - [ ] Security audit completion |
| 148 | - [ ] Load testing validation |
| 149 | - [ ] Example applications |
| 150 | - [ ] Migration guides |
| 151 | |
| 152 | ### Version 1.0.0 (Stable Release) |
| 153 | - [ ] API freeze and stability guarantees |
| 154 | - [ ] Production deployment validation |
| 155 | - [ ] Long-term support commitment |
| 156 | - [ ] Ecosystem integration completion |
| 157 | |
| 158 | ## 📊 Development Metrics |
| 159 | |
| 160 | ### Code Statistics (Estimated) |
| 161 | - **Total lines**: ~15,000 lines of Rust code |
| 162 | - **Test coverage**: ~60% estimated (needs improvement to 90%+) |
| 163 | - **Documentation coverage**: ~80% (public APIs mostly documented) |
| 164 | - **Dependency count**: 25+ fe2o3 crates + external dependencies |
| 165 | |
| 166 | ### Performance Targets |
| 167 | - **Handshake latency**: <100ms on modern hardware |
| 168 | - **Throughput**: >10,000 packets/second per core |
| 169 | - **Memory usage**: <50MB for 1,000 concurrent sessions |
| 170 | - **DoS resistance**: Handle 100,000+ attack packets/second |
| 171 | |
| 172 | --- |
| 173 | |
| 174 | *Last updated: 2025-07-01* |
| 175 | *Generated by: Claude Code analysis* |