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github-actions[bot] edited this page Mar 23, 2026 · 2 revisions

ModBridge Implementation Status

This document tracks the implementation status of all features, improvements, and enhancements for ModBridge.

Last Updated: 2026-03-13 Version: Working towards v0.3.0

Legend

  • ✅ Implemented - Feature is complete and production-ready
  • 🟡 In Progress - Currently being implemented
  • 🟠 Partial - Partially implemented, needs completion
  • ⚪ Planned - Planned but not started
  • ❌ Not Applicable - Feature decided against or not needed

High Priority Features (Critical)

Error Handling & Recovery

Feature Status Notes PR/Issue
Configuration Validation (IP/port ranges) 🟡 In Progress Basic validation exists, needs comprehensive checks
Database Connection Fallback ⚪ Planned Need fallback mechanisms when SQLite fails
Graceful Degradation ⚪ Planned System should continue with degraded functionality
Context Propagation ✅ Implemented Proper context cancellation in place
Network Error Recovery 🟠 Partial Circuit breaker exists, needs enhancement
Configuration Corruption Detection ⚪ Planned Detect and recover from corrupted config files

Testing & Quality Assurance

Feature Status Notes PR/Issue
Unit Tests ✅ Implemented 36 test files covering core functionality
Integration Tests 🟡 In Progress Need tests with mock/real Modbus devices
Load/Performance Tests 🟡 In Progress Being implemented
Chaos Engineering Tests ⚪ Planned Failure injection tests
Security Tests ⚪ Planned Penetration testing scenarios
Test Coverage (>80%) 🟠 Partial Currently ~18%, needs significant improvement
Benchmark Tests ⚪ Planned Performance regression tests

Security Enhancements

Feature Status Notes PR/Issue
Basic Authentication ✅ Implemented bcrypt + session management
CSRF Protection ✅ Implemented Token-based CSRF protection
Rate Limiting ✅ Implemented Global rate limiting in place
Input Sanitization 🟠 Partial XSS protection exists, needs expansion
RBAC (Role-Based Access Control) 🟡 In Progress Being implemented
Audit Logging 🟡 In Progress Security event tracking
TLS/HTTPS Support 🟡 In Progress Certificate configuration
Security Headers ⚪ Planned CSP, HSTS, X-Frame-Options
API Key Authentication ⚪ Planned Alternative to session-based auth
mTLS Support 🟡 In Progress Mutual TLS for proxy connections
IP Whitelisting/Blacklisting ✅ Implemented Per-proxy IP filtering

Medium Priority Features

Modbus Protocol Enhancements

Feature Status Notes PR/Issue
Modbus TCP ✅ Implemented Full TCP support
Modbus RTU 🟡 In Progress Serial/RTU protocol support
TCP ↔ RTU Conversion 🟡 In Progress Protocol conversion gateway
Custom Function Codes ⚪ Planned Extensibility for non-standard operations
Multi-Master Support ⚪ Planned Handle multiple master devices

Data Processing

Feature Status Notes PR/Issue
Register Mapping 🟡 In Progress Address translation
Data Type Conversion 🟡 In Progress INT16, INT32, FLOAT, etc.
Scaling & Offset 🟡 In Progress Mathematical transformations
Bit Manipulation ⚪ Planned Bit-level operations

Performance Optimizations

Feature Status Notes PR/Issue
Connection Pooling ✅ Implemented Advanced pooling with health monitoring
Request Batching 🟡 In Progress Batch multiple register reads
Response Caching 🟠 Partial Basic caching exists, needs enhancement
Response Compression 🟡 In Progress Gzip compression for large responses
DNS Caching ✅ Implemented Built-in Go DNS caching
Zero-Copy Techniques ⚪ Planned Optimize data transfer
Memory Profiling ✅ Implemented pprof endpoints available

Monitoring & Observability

Feature Status Notes PR/Issue
Prometheus Metrics ✅ Implemented /api/metrics endpoint
Structured Logging ✅ Implemented Custom logger with levels
Health Checks ✅ Implemented /api/health endpoint
Readiness Probes 🟠 Partial Basic health, needs detailed checks
Distributed Tracing ⚪ Planned OpenTelemetry support
Log Shipping ⚪ Planned Syslog, fluentd integration
Performance Dashboards ⚪ Planned Grafana examples

Enterprise Features

High Availability & Scaling

Feature Status Notes PR/Issue
Clustering Support 🟡 In Progress Multi-instance coordination
Leader Election 🟡 In Progress For HA deployments
Shared State Backend 🟡 In Progress Redis/etcd integration
Configuration Synchronization 🟡 In Progress Sync config across instances
Health-based Failover ⚪ Planned Automatic failover
Horizontal Scaling 🟠 Partial Stateless design, needs load balancer integration

Enterprise Integration

Feature Status Notes PR/Issue
LDAP Integration 🟡 In Progress Active Directory support
Multi-Tenancy ⚪ Planned Multiple isolated organizations
SSO Integration ⚪ Planned SAML/OAuth support
Multi-Factor Authentication ⚪ Planned 2FA for admin access
Advanced Alerting 🟠 Partial Basic alerts, needs escalation policies
Compliance Reporting ⚪ Planned ISO, SOC2 reports

Kubernetes & Cloud Native

Feature Status Notes PR/Issue
Docker Support ✅ Implemented Dockerfile and compose files
Helm Chart ⚪ Planned Kubernetes deployment
Kubernetes Operator ⚪ Planned CRD-based management
Multi-arch Builds ✅ Implemented Linux, macOS, Windows, ARM
Distroless Images ⚪ Planned Minimal attack surface
Terraform Modules ⚪ Planned Infrastructure as Code

Developer Experience

Documentation

Feature Status Notes PR/Issue
README ✅ Implemented Comprehensive project documentation
API Documentation 🟠 Partial Basic docs, needs OpenAPI/Swagger
Architecture Diagram ⚪ Planned Visual architecture overview
Performance Tuning Guide 🟡 In Progress Optimization documentation
Security Hardening Guide 🟡 In Progress Security best practices
Troubleshooting Guide 🟠 Partial Basic troubleshooting exists
Deployment Guides ✅ Implemented Multiple deployment methods documented

Developer Tools

Feature Status Notes PR/Issue
CLI Management Tool 🟡 In Progress modbusctl for scripting
Configuration Validation 🟠 Partial Basic validation, needs enhancement
Debug Mode ✅ Implemented Detailed logging available
API Client SDKs ⚪ Planned Go, Python, JavaScript libraries
Plugin System ⚪ Planned Extensibility architecture

API & Integration

Feature Status Notes PR/Issue
REST API ✅ Implemented Comprehensive HTTP API
OpenAPI/Swagger 🟡 In Progress Interactive API documentation
WebSocket/SSE ✅ Implemented Real-time updates via SSE
Webhooks ⚪ Planned Event notifications

User Experience

Web Interface

Feature Status Notes PR/Issue
Basic Dashboard ✅ Implemented Vue.js + PrimeVue interface
Proxy Management UI ✅ Implemented Create, edit, delete proxies
Device Tracking UI ✅ Implemented View connected devices
Real-time Monitoring ✅ Implemented Live traffic via SSE
Dark Mode ⚪ Planned Theme switching
Mobile Responsive 🟠 Partial Basic responsive design
Bulk Operations ⚪ Planned Multi-proxy actions
Configuration Templates ⚪ Planned Reusable proxy configs
Drag-and-Drop Configuration ⚪ Planned Visual proxy builder
Performance Charts ⚪ Planned Real-time metrics visualization

Completed Features

Core Functionality ✅

  • Multi-proxy management with individual control
  • Modbus TCP proxy with high performance (~10k req/s)
  • Embedded web interface (single binary)
  • SQLite device tracking and connection history
  • Real-time traffic logging via SSE
  • Graceful shutdown with context management
  • Configuration import/export
  • Comprehensive logging system

Advanced Features ✅

  • Circuit breaker pattern for fault tolerance
  • Connection pooling with auto-recovery
  • Exponential backoff retry logic
  • Dead connection detection
  • Request splitting for large reads
  • Load balancing capabilities
  • Alerting system
  • Health monitoring

Security ✅

  • Password hashing with bcrypt
  • Session-based authentication
  • XSS protection
  • CSRF token validation
  • Path traversal prevention
  • SQL injection protection (parameterized queries)
  • Rate limiting (global)

Operations ✅

  • Docker containerization
  • Multi-platform builds (Linux, macOS, Windows, ARM)
  • Makefile with standard targets
  • Build scripts for automation
  • Health check endpoints
  • Prometheus metrics export

In Progress 🟡

Currently Being Developed

  1. RBAC Implementation - Role-based access control for granular permissions
  2. Audit Logging - Comprehensive security event tracking
  3. Modbus RTU Support - Serial protocol implementation
  4. TLS/HTTPS - Secure communications
  5. Integration Tests - Tests with mock Modbus devices
  6. Load Tests - Performance validation under load
  7. Configuration Validation - Comprehensive input validation
  8. Data Transformation - Register mapping, scaling, type conversion

Next Steps (Priority Order)

Immediate (This Sprint)

  1. Complete RBAC implementation
  2. Add comprehensive configuration validation
  3. Implement database fallback mechanisms
  4. Expand input sanitization coverage
  5. Create integration test suite

Short Term (Next Sprint)

  1. Complete audit logging
  2. Implement TLS/HTTPS
  3. Add Modbus RTU support
  4. Implement data transformation features
  5. Create security hardening guide

Medium Term (Next Quarter)

  1. Complete clustering support
  2. Implement LDAP integration
  3. Add request batching
  4. Create OpenAPI documentation
  5. Build CLI management tool

Long Term (Future)

  1. Kubernetes operator
  2. Multi-tenancy support
  3. Distributed tracing
  4. Advanced analytics
  5. Plugin system

Performance Metrics

Current Performance (v0.1.x)

  • Throughput: ~10,000 requests/second
  • Latency: ~3-5ms (p99)
  • Memory: ~10MB base usage
  • Concurrent connections: ~1,000

Target Performance (v0.3.0)

  • Throughput: ~50,000 requests/second
  • Latency: <2ms (p99)
  • Memory: <8MB base usage
  • Concurrent connections: ~5,000

Stretch Goals (v1.0.0)

  • Throughput: >1,000,000 requests/second
  • Latency: <0.5ms (p99)
  • Memory: <100MB @ scale
  • Concurrent connections: >10,000

Testing Coverage

Current Status

Total Go Files: 197
Test Files: 36
Coverage: ~18%

Coverage by Module

  • pkg/manager/: ~40% covered
  • pkg/proxy/: ~25% covered
  • pkg/api/: ~30% covered
  • pkg/auth/: ~60% covered
  • pkg/config/: ~50% covered
  • pkg/database/: ~20% covered
  • pkg/logger/: ~10% covered

Target Coverage

  • Minimum acceptable: 60%
  • Good: 80%
  • Excellent: 90%+

Dependencies

External Dependencies Status

  • ✅ Go 1.21+ - Current and supported
  • ✅ Vue.js 3 - Latest stable
  • ✅ PrimeVue - Current version
  • ✅ SQLite - Embedded, no external dependency
  • ✅ Docker - Multi-stage builds implemented
  • ⚪ Redis - Planned for clustering
  • ⚪ etcd - Planned for distributed configuration
  • ⚪ LDAP libraries - To be integrated

Known Issues & Limitations

Current Limitations

  1. No RTU Support - Only TCP protocol currently supported
  2. Single Instance - No clustering/HA yet
  3. Limited Testing - Test coverage needs improvement
  4. Manual Scaling - No auto-scaling support
  5. Basic Auth - No RBAC or LDAP yet
  6. HTTP Only - No TLS/HTTPS by default
  7. No Data Transformation - Raw Modbus data only
  8. Manual Backup - No automated backup system

Being Fixed

  • RBAC implementation in progress
  • TLS support being added
  • RTU support under development
  • Test suite expansion

Release History

v0.1.0 (Current)

  • Initial stable release
  • Core proxy functionality
  • Web interface
  • Basic authentication
  • Device tracking
  • Prometheus metrics

v0.2.0 (In Progress)

  • Enhanced testing
  • Security improvements (RBAC, TLS)
  • RTU protocol support
  • Performance optimizations

v0.3.0 (Planned)

  • Data transformation
  • Advanced monitoring
  • Clustering basics
  • Improved UI/UX

v1.0.0 (Future)

  • Full enterprise features
  • Kubernetes operator
  • Multi-tenancy
  • 99.9% SLA

Contributors & Status

This document is maintained by the ModBridge development team and updated regularly to reflect the current state of the project.

For questions or to contribute, please see CONTRIBUTING.md or open an issue on GitHub.

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