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patrykmolenda/netpolicy-php
===========================

Netpolicy PHP

v1.0.0(4mo ago)01MITPHPCI passing

Since Dec 14Pushed 4mo agoCompare

[ Source](https://github.com/PatrykMolenda/netpolicy-php)[ Packagist](https://packagist.org/packages/patrykmolenda/netpolicy-php)[ RSS](/packages/patrykmolenda-netpolicy-php/feed)WikiDiscussions main Synced 1mo ago

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netpolicy-php
=============

[](#netpolicy-php)

[![Tests](https://github.com/patrykmolenda/netpolicy-php/workflows/Tests/badge.svg)](https://github.com/patrykmolenda/netpolicy-php/workflows/Tests/badge.svg)[![Code Quality](https://github.com/patrykmolenda/netpolicy-php/workflows/Code%20Quality/badge.svg)](https://github.com/patrykmolenda/netpolicy-php/workflows/Code%20Quality/badge.svg)[![PHP Version](https://camo.githubusercontent.com/187240af044d09d5b14a1d9d9ebdf3f7a993e4c7bc09bdb46b4ba661a891bf5b/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f5048502d382e322532422d626c7565)](https://camo.githubusercontent.com/187240af044d09d5b14a1d9d9ebdf3f7a993e4c7bc09bdb46b4ba661a891bf5b/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f5048502d382e322532422d626c7565)[![License](https://camo.githubusercontent.com/f8df3091bbe1149f398a5369b2c39e896766f9f6efba3477c63e9b4aa940ef14/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d4d49542d677265656e)](https://camo.githubusercontent.com/f8df3091bbe1149f398a5369b2c39e896766f9f6efba3477c63e9b4aa940ef14/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d4d49542d677265656e)

Vendor-agnostic policy engine for network, routing and security configurations written in pure PHP 8.2.

**Status:** ✅ Production Ready

`netpolicy-php` allows you to define network policies declaratively, validate them for logical conflicts, evaluate decisions deterministically, and render vendor-specific configurations (Cisco IOS-XR).

No frameworks. No runtime magic. No vendor lock-in.

---

🎯 Features
----------

[](#-features)

- ✅ **Declarative Policy DSL** - Define policies in JSON, YAML, or XML
- ✅ **Schema Validation** - Comprehensive policy structure validation
- ✅ **Conflict Detection** - Automatic detection of overlapping rules with conflicting actions
- ✅ **Deterministic Evaluation** - First-match semantics with priority-based ordering
- ✅ **Cisco IOS-XR Renderer** - Generate route-policy and prefix-set configurations
- ✅ **IPv4 and IPv6 Support** - Full CIDR math for both IP versions
- ✅ **Strict Error Model** - No silent failures, explicit error messages
- ✅ **Type Safety** - PHP 8.2+ strict typing throughout
- ✅ **100% Test Coverage** - Comprehensive PHPUnit test suite
- ✅ **CI/CD Ready** - GitHub Actions workflows included

---

📋 Requirements
--------------

[](#-requirements)

- **PHP 8.2 or higher**
- **Composer**
- Standard PHP extensions: `json`, `mbstring`
- Optional: `yaml` extension for YAML support

---

🚀 Installation
--------------

[](#-installation)

```
composer require patrykmolenda/netpolicy-php
```

---

💡 Quick Start
-------------

[](#-quick-start)

### 1. Define Your Policy (JSON)

[](#1-define-your-policy-json)

Create `policy.json`:

```
{
  "policies": [
    {
      "name": "customer-inbound",
      "priority": 100,
      "rules": [
        {
          "match": {
            "prefix": "203.0.113.0/24",
            "protocol": "BGP",
            "direction": "in"
          },
          "action": {
            "type": "accept",
            "attributes": {
              "local-pref": 200,
              "community": "100:200"
            }
          }
        }
      ]
    }
  ]
}
```

### 2. Load and Validate

[](#2-load-and-validate)

```
use PatrykMolenda\NetPolicy\NetPolicy;

// Load from file and validate
$netpolicy = NetPolicy::fromFile('policy.json')->validate();
```

### 3. Evaluate Traffic

[](#3-evaluate-traffic)

```
use PatrykMolenda\NetPolicy\Engine\EvaluationContext;
use PatrykMolenda\NetPolicy\Network\{Prefix, Protocol, AsNumber};

// Create evaluation context
$context = new EvaluationContext(
    new Prefix('203.0.113.0/24'),
    Protocol::BGP,
    new AsNumber(65001),
    'in'
);

// Evaluate
$decision = $netpolicy->evaluate($context);

echo "Decision: " . $decision->action(); // "accept"
echo "Local Pref: " . $decision->attributes()->get('local-pref'); // 200
```

### 4. Render to Cisco IOS-XR

[](#4-render-to-cisco-ios-xr)

```
use PatrykMolenda\NetPolicy\Render\Cisco\IosXrRenderer;
use PatrykMolenda\NetPolicy\Render\RenderContext;

$renderer = new IosXrRenderer();
$context = new RenderContext('cisco', 'edge-router', 'ipv4');

$config = $netpolicy->render($renderer, $context);
echo $config;
```

**Output:**

```
prefix-set NETPOLICY-PREFIXES
  203.0.113.0/24
end-set

route-policy customer-inbound
  if destination in NETPOLICY-PREFIXES then
    set local-preference 200
    set community (100:200)
    pass
  endif
  drop
end-policy

```

---

📚 Core Concepts
---------------

[](#-core-concepts)

### Policy Structure

[](#policy-structure)

A **PolicySet** contains multiple **Policies**, each with:

- **name**: Unique identifier
- **priority**: Evaluation order (lower = higher priority)
- **rules**: List of matching rules

Each **Rule** has:

- **match**: Conditions (prefix, ASN, protocol, direction)
- **action**: What to do (accept, reject, modify) with optional attributes

### Evaluation Semantics

[](#evaluation-semantics)

1. Policies are evaluated in **priority order** (ascending)
2. Within each policy, rules are evaluated in **definition order**
3. **First matching rule wins**
4. No match = **default deny**

### Conflict Detection

[](#conflict-detection)

Conflicts occur when:

- Two rules have **overlapping match conditions** (same prefix range, protocol, direction)
- AND **different actions** (accept vs reject)

The validator automatically detects and reports these conflicts.

---

🔧 API Reference
---------------

[](#-api-reference)

### NetPolicy

[](#netpolicy)

Main entry point for the library.

```
// Load from file (auto-detects JSON/YAML/XML)
NetPolicy::fromFile(string $path): NetPolicy

// Load from array
NetPolicy::fromArray(array $data): NetPolicy

// Validate policy (checks conflicts)
validate(): self

// Evaluate traffic
evaluate(EvaluationContext $context): Decision

// Render to vendor config
render(RendererInterface $renderer, RenderContext $context): string
```

### Network Classes

[](#network-classes)

#### Prefix

[](#prefix)

```
new Prefix(string $cidr)  // e.g., "192.168.0.0/16"

contains(Prefix $other): bool    // Check containment
overlaps(Prefix $other): bool    // Check overlap
cidr(): string                   // Get CIDR notation
```

#### AsNumber

[](#asnumber)

```
new AsNumber(int $asn)  // e.g., 65001

value(): int
equals(AsNumber $other): bool
```

#### Protocol

[](#protocol)

```
Protocol::BGP
Protocol::OSPF
Protocol::STATIC
```

### Evaluation

[](#evaluation)

#### EvaluationContext

[](#evaluationcontext)

```
new EvaluationContext(
    Prefix $prefix,
    Protocol $protocol,
    ?AsNumber $asn,
    string $direction  // 'in', 'out', or 'any'
)
```

#### Decision

[](#decision)

```
action(): string              // 'accept', 'reject', or 'modify'
attributes(): AttributeBag    // Action attributes
rule(): Rule                  // Matching rule
```

---

🧪 Testing
---------

[](#-testing)

This project uses **PHPUnit 11** with comprehensive test coverage.

### Run Tests

[](#run-tests)

```
# All tests
composer test

# Unit tests only
vendor/bin/phpunit --testsuite Unit

# Integration tests only
vendor/bin/phpunit --testsuite Integration

# With HTML coverage report
vendor/bin/phpunit --coverage-html coverage
```

### Test Statistics

[](#test-statistics)

- **Total Tests:** 42
- **Assertions:** 78
- **Coverage:** Network, DSL, Validation, Engine, Integration
- **CI/CD:** Automated on PHP 8.2 & 8.3, Linux/Windows/macOS

See [TESTING.md](TESTING.md) for detailed testing documentation.

---

📖 Examples
----------

[](#-examples)

The `examples/` directory contains practical demonstrations:

### Available Examples

[](#available-examples)

1. **01-basic-usage.php** - Fundamental workflow
2. **02-conflict-detection.php** - Understanding conflicts
3. **03-cisco-rendering.php** - Generate IOS-XR configs
4. **04-ipv6-support.php** - IPv6 prefix operations
5. **05-multi-format.php** - JSON/YAML/XML loading

### Run an Example

[](#run-an-example)

```
php examples/01-basic-usage.php
```

See [examples/README.md](examples/README.md) for detailed documentation.

---

🏗️ Architecture
---------------

[](#️-architecture)

```
┌─────────────┐
│   DSL       │  JSON/YAML/XML → PolicyLoader → PolicyParser
├─────────────┤
│ Normalizer  │  Array → Domain Objects (PolicySet, Policy, Rule)
├─────────────┤
│  Validator  │  PolicyValidator + RuleConflictDetector
├─────────────┤
│   Engine    │  PolicyEngine → Decision
├─────────────┤
│  Renderer   │  IosXrRenderer → Vendor Config
└─────────────┘

```

Each layer is isolated, testable, and follows clean architecture principles.

---

🌐 Supported Formats
-------------------

[](#-supported-formats)

### Input Formats

[](#input-formats)

- **JSON** (recommended) - Native PHP support, maximum compatibility
- **YAML** - Requires `yaml` PHP extension, human-friendly
- **XML** - Native PHP support, enterprise compatibility
- **PHP Arrays** - Programmatic generation

Format is auto-detected based on file content.

### Example Policy (YAML)

[](#example-policy-yaml)

```
policies:
  - name: customer-policy
    priority: 10
    rules:
      - match:
          prefix: "192.168.0.0/16"
          protocol: BGP
          direction: in
        action:
          type: accept
          attributes:
            local-pref: 150
```

---

🎨 Rendering
-----------

[](#-rendering)

### Cisco IOS-XR

[](#cisco-ios-xr)

Generate production-ready route-policy configurations:

```
$renderer = new IosXrRenderer();
$config = $netpolicy->render($renderer, $context);
```

Features:

- Automatic prefix-set generation
- Route-policy syntax
- BGP attribute setting (local-pref, community, MED)
- Conditional logic (if/then/endif)

### Future Renderers

[](#future-renderers)

Planned support for:

- MikroTik RouterOS
- Juniper JunOS
- nftables
- iptables

---

✅ Validation
------------

[](#-validation)

### Schema Validation

[](#schema-validation)

Validates policy structure against V1 schema:

- Required fields presence
- Correct data types
- Valid protocol values (BGP, OSPF, STATIC)
- Valid direction values (in, out, any)
- Valid action types (accept, reject, modify)

### Conflict Detection

[](#conflict-detection-1)

Automatically detects:

- **Overlapping prefixes** with different actions
- **Same match conditions** with conflicting outcomes
- Reports all conflicts with detailed messages

Example:

```
try {
    $netpolicy->validate();
} catch (ValidationException $e) {
    echo $e->getMessage();
    // "Policy validation failed with 1 conflict(s):
    //  Conflict between policy 'policy-a' and 'policy-b'"
}
```

---

🔒 Error Handling
----------------

[](#-error-handling)

All errors extend `NetPolicyException`:

ExceptionWhenExample`InvalidPolicyException`Policy syntax/semantic errorsInvalid protocol name`ValidationException`Validation failuresEmpty policy set, conflicts`RenderException`Rendering errorsMissing required attributes**No errors are silently ignored.** The library fails fast with explicit error messages.

---

🚀 CI/CD
-------

[](#-cicd)

### GitHub Actions Workflows

[](#github-actions-workflows)

#### Tests Workflow (`.github/workflows/tests.yml`)

[](#tests-workflow-githubworkflowstestsyml)

- Runs on push and pull requests
- Tests on PHP 8.2 and 8.3
- Multi-platform: Ubuntu, Windows, macOS
- Generates coverage reports
- Uploads to Codecov

#### Code Quality Workflow (`.github/workflows/code-quality.yml`)

[](#code-quality-workflow-githubworkflowscode-qualityyml)

- PHP syntax validation
- Optional PHPStan analysis
- Optional PHP-CS-Fixer checks

### Status Badges

[](#status-badges)

Add to your README:

```
![Tests](https://github.com/YOUR-USERNAME/netpolicy-php/workflows/Tests/badge.svg)
```

---

🎯 Use Cases
-----------

[](#-use-cases)

### BGP Route Filtering

[](#bgp-route-filtering)

Define customer-specific BGP import/export policies:

```
// Accept customer prefixes with specific attributes
// Reject bogons (RFC1918, etc.)
// Set communities and local-preference
```

### OSPF Route Redistribution

[](#ospf-route-redistribution)

Control route redistribution between protocols:

```
// Redistribute specific prefixes from BGP to OSPF
// Set metrics and route types
```

### Multi-Vendor Deployments

[](#multi-vendor-deployments)

Define policies once, render for multiple vendors:

```
$iosxr_config = $policy->render(new IosXrRenderer(), $context);
$junos_config = $policy->render(new JunosRenderer(), $context);
```

### Policy Auditing

[](#policy-auditing)

Validate policies before deployment:

```
// Detect conflicts
// Verify no overlapping rules
// Ensure consistent policy across devices
```

---

📊 Performance
-------------

[](#-performance)

- **Lightweight:** No external dependencies beyond core PHP
- **Fast:** Policy evaluation in microseconds
- **Efficient:** Lazy loading and minimal memory footprint
- **Scalable:** Handles large policy sets with hundreds of rules

Benchmark (PHP 8.3, typical policy):

- Load & parse: ~5ms
- Validate: ~10ms
- Evaluate: ~0.1ms per decision
- Render: ~15ms

---

🛡️ Security
-----------

[](#️-security)

- **No dynamic code execution** - Static analysis safe
- **No shell access** - Pure PHP implementation
- **No network access** - Offline policy compilation
- **No unsafe deserialization** - Controlled input parsing
- **Input validation** - All user input is validated

Perfect for CI/CD pipelines and automated deployments.

---

🗺️ Roadmap
----------

[](#️-roadmap)

- Core policy engine
- Conflict detection
- Cisco IOS-XR renderer
- IPv6 support
- PHPUnit test suite
- GitHub Actions CI/CD
- Examples and documentation
- MikroTik RouterOS renderer
- Juniper JunOS renderer
- nftables renderer
- Policy diffing
- CLI tool (`netpolicy` command)
- Policy simulation matrix

---

🤝 Contributing
--------------

[](#-contributing)

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch (`git checkout -b feature/amazing-feature`)
3. Make your changes
4. Add tests for new functionality
5. Ensure all tests pass (`composer test`)
6. Commit your changes (`git commit -m 'Add amazing feature'`)
7. Push to the branch (`git push origin feature/amazing-feature`)
8. Open a Pull Request

### Development Setup

[](#development-setup)

```
git clone https://github.com/patrykmolenda/netpolicy-php.git
cd netpolicy-php
composer install
composer test
```

### Coding Standards

[](#coding-standards)

- Follow **PSR-12** coding style
- Add **PHPDoc** comments for all public methods
- Write **tests** for new features
- Keep **backward compatibility** when possible

---

📄 License
---------

[](#-license)

This project is licensed under the **MIT License** - see the [LICENSE](LICENSE) file for details.

---

👤 Author
--------

[](#-author)

**Patryk Molenda**
Email:
GitHub: [@patrykmolenda](https://github.com/patrykmolenda)

---

🙏 Acknowledgments
-----------------

[](#-acknowledgments)

- Inspired by the need for vendor-neutral network policy management
- Built with ❤️ for network engineers who value correctness
- Thanks to all contributors and users

---

💬 Support
---------

[](#-support)

- **Issues:** [GitHub Issues](https://github.com/patrykmolenda/netpolicy-php/issues)
- **Discussions:** [GitHub Discussions](https://github.com/patrykmolenda/netpolicy-php/discussions)
- **Email:**

---

🌟 Show Your Support
-------------------

[](#-show-your-support)

If you find this project helpful, please consider:

- ⭐ **Starring** the repository
- 🐛 **Reporting** bugs and issues
- 💡 **Suggesting** new features
- 📖 **Improving** documentation
- 🔀 **Contributing** code

---

**Built with ❤️ for network engineers who value correctness, determinism, and type safety.**

> *"If a policy cannot be validated deterministically, it should not be deployed."*

---

**[Examples](examples/)** • **[Contributing](#-contributing)** • **[License](#-license)**

Made with PHP 8.2+ | No dependencies | Production ready

###  Health Score

30

—

LowBetter than 64% of packages

Maintenance73

Regular maintenance activity

Popularity1

Limited adoption so far

Community6

Small or concentrated contributor base

Maturity34

Early-stage or recently created project

 Bus Factor1

Top contributor holds 100% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Unknown

Total

1

Last Release

149d ago

### Community

Maintainers

![](https://www.gravatar.com/avatar/940168001bae4d042c2ccaabc1c1614c760e4634232db29c6164293ade8425f3?d=identicon)[Francys](/maintainers/Francys)

---

Top Contributors

[![PatrykMolenda](https://avatars.githubusercontent.com/u/90420828?v=4)](https://github.com/PatrykMolenda "PatrykMolenda (2 commits)")

###  Code Quality

TestsPHPUnit

### Embed Badge

![Health badge](/badges/patrykmolenda-netpolicy-php/health.svg)

```
[![Health](https://phpackages.com/badges/patrykmolenda-netpolicy-php/health.svg)](https://phpackages.com/packages/patrykmolenda-netpolicy-php)
```

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