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Testing

Unit Tests

Run unit and integration tests:

cargo test

Test suites included:

  • ChaCha masking / unmasking round-trip
  • Config parser (single peer, multi-peer, duplicate port rejection)
  • MAC / veth addressing helpers
  • Kernel-version detection

Integration Tests with WireGuard

# Full integration test (requires sudo, wireguard-tools, iperf3, tcpdump, jq)
make test-integration

# Or directly:
sudo bash tests/integration-wg.sh

The test spins up two network namespaces, runs gutd in each with a shared key, establishes a WireGuard tunnel through the gutd veth pair, and verifies connectivity with iperf3. Artifacts written to /tmp/gutd-test-*.{log,pcap,txt}.

See tests/README.md for details.