Complete Network Integration Tests in Docker Environment

[sravinet]

🌐 Network Integration Tests - Docker Environment Enhancement

Overview

During comprehensive test enhancement, we successfully added 76 new security tests but identified 7 network integration tests that require additional Docker configuration to run fully in containerized environments.

Tests Requiring Docker Enhancement

The following integration tests are functional but hang in the current Docker setup due to container networking limitations:

1. test_wg_start_ipv4 - IPv4 WireGuard tunnel establishment
2. test_wg_start_ipv4_non_connected - IPv4 tunnel with non-connected sockets
3. test_wg_start_ipv6 - IPv6 WireGuard tunnel establishment
4. test_wg_start_ipv6_endpoint - IPv6 endpoint connectivity (Linux only)
5. test_wg_start_ipv6_endpoint_not_connected - IPv6 non-connected mode
6. test_wg_concurrent - Concurrent IPv4 connections stress test
7. test_wg_concurrent_v6 - Concurrent IPv6 connections stress test

Current Status

✅ What Works:

• Tests compile and begin execution
• TUN interface creation succeeds
• Basic WireGuard socket communication works (test_wireguard_get, test_wireguard_set)
• Docker privileged mode with --device=/dev/net/tun operational

⚠️ What Needs Enhancement:

• Docker-in-Docker configuration for peer container simulation
• Network namespace isolation for multiple WireGuard instances
• Container networking setup for peer-to-peer communication
• Timeout handling for long-running network tests

Technical Requirements

Docker Environment Enhancements Needed

1. Docker-in-Docker Setup

   # Enhanced Docker daemon access for peer containers
   RUN dockerd --storage-driver=vfs --insecure-registry=localhost:5000 &

2. Network Namespace Configuration

   # Multiple network namespace support
   sudo ip netns add wg-test-ns1
   sudo ip netns add wg-test-ns2

3. Container Orchestration

   # Peer container management with proper networking
   docker run --network=container:wg-main --cap-add=NET_ADMIN vkrasnov/wireguard-test

Implementation Approach

Option 1: Enhanced Docker Compose Setup

Create docker-compose.test.yml with:

• Main test container with TUN capabilities
• Peer simulation containers with WireGuard setup
• Shared network configuration
• Volume mounts for test coordination

Option 2: Test Environment Scripts

Develop scripts/setup-integration-env.sh:

• Automated Docker daemon configuration
• Network namespace preparation
• Container lifecycle management
• Test result aggregation

Option 3: Alternative Test Strategy

Implement mock peer simulation:

• In-process peer containers using network namespaces
• Simplified networking without full Docker containers
• Maintained protocol compliance testing

Success Criteria

• All 7 network integration tests complete successfully
• Tests run within reasonable timeframes (< 5 minutes each)
• Full WireGuard protocol compliance validated
• Concurrent connection testing operational
• IPv4 and IPv6 dual-stack support confirmed

Current Test Coverage

Total Tests: 118 (enhanced from ~30)

• ✅ Unit Tests: 74/74 passing
• ✅ Security Tests: 32/32 passing
• ✅ Basic Integration: 2/9 passing
• ⏳ Network Integration: 7/9 requiring Docker enhancement

Priority

Medium-High Priority

• These tests validate critical WireGuard protocol functionality
• Important for security compliance and protocol correctness
• Required for complete integration testing coverage
• Enhances confidence in production deployment

References

• Test Location: boringtun/src/device/integration_tests/mod.rs
• Docker Config: Dockerfile.test
• Test Runner: run-tests.sh
• Documentation: NETWORK_INTEGRATION_TESTS_STATUS.md

Acceptance Criteria

Definition of Done:

1. All 7 network integration tests execute successfully in Docker
2. Tests complete within acceptable time limits
3. Protocol compliance fully validated
4. Documentation updated with new setup procedures
5. CI/CD integration ready for automated testing