ci.yaml

name: ci

on:
  push:
  pull_request:

env:
  ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION: true
  PLATFORMS: linux/amd64

permissions:
  packages: write

jobs:
  make_check:
    strategy:
      fail-fast: false
      matrix:
        combination:
          #Debug
          - { kernel: 'Linux 6.8', runner: 'ubuntu-24.04', clangs: 'clang-14 clang-15 clang-16 clang-17 clang-18', debug: '1' }

          #NDEBUG
          - { kernel: 'Linux 6.8', runner: 'ubuntu-24.04', clangs: 'clang-14 clang-15 clang-16 clang-17 clang-18', debug: '0' }
    runs-on: ${{ matrix.combination.runner }}
    steps:
      - name: "Checkout sfunnel"
        uses: actions/checkout@v4
        with:
          path: sfunnel
          fetch-depth: 0
          fetch-tags: 1

      - name: "Install deps..."
        run: |
          sudo add-apt-repository universe
          sudo apt-get update
          sudo apt-get install -y ${{matrix.combination.clangs}} make iproute2 \
                                  bridge-utils python3-scapy python3-pip libbpf-dev \
                                  libelf-dev linux-headers-generic \
                                  linux-libc-dev llvm iptables
          sudo ln -s /usr/include/x86_64-linux-gnu/asm /usr/include/asm
          if [[ "${{ matrix.combination.runner }}" == "ubuntu-24.04" ]]; then
            sudo apt-get install python3-pytest
          else
            sudo pip3 install pytest #pytest binary missing in python3-pytest
          fi
      - name: "Allow test traffic in iptables/nftables"
        run: |
          sudo iptables -L -n
          sudo iptables -t nat -L -n
          sudo iptables -I FORWARD -s 11.1.1.1 -j ACCEPT

      - name: "Run tests on '${{matrix.combination.clangs}}'..."
        run: |
          cd sfunnel/test
          for clang in ${{matrix.combination.clangs}}; do
            echo "[${clang}] Running tests ..."
            make VERBOSE=1 CLANG=${clang} DEBUG=${{matrix.combination.debug}} || ( echo "FAILED: test failed with '${clang}' debug='${{matrix.combination.debug}}'" && exit 1 )
            make clean 2>&1 > /dev/null
            echo "[${clang}]"
          done

  docker_build_test_publish:
    needs: [make_check]
    runs-on: ubuntu-22.04
    steps:
      - name: "Checkout sfunnel"
        uses: actions/checkout@v4
        with:
          path: sfunnel
          fetch-depth: 0
          fetch-tags: 1

      - name: "Set up Docker buildx"
        uses: docker/setup-buildx-action@v3

      - name: "Login to GitHub Container Registry (ghcr.io)"
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{github.actor}}
          password: ${{secrets.GITHUB_TOKEN}}

      - name: "Build container"
        run: |
          #Cross-build
          cd sfunnel

          echo "Fix mess with tags in actions/checkout..."
          git fetch -f && git fetch -f --tags

          docker buildx build --platform ${PLATFORMS} -t sfunnel --build-arg VERSION="$(git describe)" --build-arg COMMIT="${GITHUB_SHA}" --load -f docker/Dockerfile .

      - name: "[TEST] Run container without env. nor file. Should fail..."
        run: |
          set -o pipefail
          docker run --privileged sfunnel:latest 2>&1 | tee output
          set +e
          docker run --privileged --network=host -v /var/run/netns:/var/run/netns -e NETNS=test_ns_invalid -e DEBUG=1 -e IFACES=lo sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -eq 0 ]; then
            echo "ERROR: container succeded when it should have FAILED!"
            exit 1
          fi
          set -e

      - name: "[TEST] Run container with ruleset file..."
        run: |
          RULE="ip saddr 127.0.0.1 udp dport 80 actions unfunnel udp"
          echo "$RULE" > ruleset

          set -o pipefail
          docker run --privileged -v `pwd`/ruleset:/etc/sfunnel/ruleset 2>&1 sfunnel:latest | tee output
          if [ ${PIPESTATUS[0]} -ne 0 ]; then
            echo "ERROR: container execution FAILED!"
            exit 1
          fi

          grep "Recompiling sfunnel BPF program" output || (echo "ERROR: unable to validate it loads the rulset file" && exit 1)
          grep "$RULE" output || (echo "ERROR: unable to validate it loads the ruleset file" && exit 1)

      - name: "[TEST] Run container with ruleset via SFUNNEL_RULESET..."
        run: |
          RULE="ip saddr 127.0.0.2 udp dport 80 actions unfunnel udp" #Should override ruleset file with 127.0.0.1

          set -o pipefail
          docker run -e SFUNNEL_RULESET="$RULE" --privileged -v `pwd`/ruleset:/etc/sfunnel/ruleset sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -ne 0 ]; then
            echo "ERROR: container execution FAILED!"
            exit 1
          fi

          grep "SFUNNEL_RULESET='$RULE'" output || (echo "ERROR: unable to validate it loads ruleset via SFUNNEL_RULESET" && exit 1)
          grep "Recompiling sfunnel BPF program" output || (echo "ERROR: unable to validate it loads ruleset via SFUNNEL_RULESET" && exit 1)
          grep "$RULE" output || (echo "ERROR: unable to validate it loads custom ruleset via SFUNNEL_RULESET" && exit 1)

      - name: "[TEST] Run container with custom params ..."
        run: |
          set -o pipefail
          docker run -e N_ATTEMPTS=7 -e RETRY_DELAY=3 -e IFACES="lo" -e DEBUG=1 -v `pwd`/ruleset:/etc/sfunnel/ruleset --privileged sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -ne 0 ]; then
            echo "ERROR: container execution FAILED!"
            exit 1
          fi

          grep "\$DEBUG='1'" output || (echo "ERROR: unable to validate it loads params (DEBUG)" && exit 1)
          grep "\-DDEBUG=1" output || (echo "ERROR: unable to validate it loads params (DEBUG), CFLAGS" && exit 1)
          grep "\$N_ATTEMPTS='7'" output || (echo "ERROR: unable to validate it loads params (N_ATTEMPTS)" && exit 1)
          grep "\$RETRY_DELAY='3'" output || (echo "ERROR: unable to validate it loads params (RETRY_DELAY)" && exit 1)
          grep "\$IFACES='lo'" output || (echo "ERROR: unable to validate it loads params (IFACES)" && exit 1)
          #Must recompile due to DEBUG=1
          grep "Recompiling sfunnel BPF program" output || (echo "ERROR: unable to validate it loads params (DEBUG)" && exit 1)
          grep "\-DDEBUG=1" output || (echo "ERROR: unable to validate it loads params (DEBUG, CFLAGS)" && exit 1)

      - name: "[TEST] Run container with DEBUG=1 ..."
        run: |
          RULE="ip saddr 127.0.0.1 udp dport 80 actions unfunnel udp"
          echo "$RULE" > ruleset

          set -o pipefail
          docker run --privileged -e DEBUG=1 -v `pwd`/ruleset:/etc/sfunnel/ruleset sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -ne 0 ]; then
            echo "ERROR: container execution FAILED!"
            exit 1
          fi

          grep "\$DEBUG='1'" output || (echo "ERROR: unable to validate it loads custom file ruleset DEBUG=1" && exit 1)
          grep "\-DDEBUG=1" output || (echo "ERROR: unable to validate it loads custom file ruleset DEBUG=1, CFLAGS" && exit 1)
          grep "Recompiling sfunnel BPF program" output || (echo "ERROR: unable to validate it loads custom file ruleset DEBUG=1" && exit 1)
          grep "$RULE" output || (echo "ERROR: unable to validate it loads custom file ruleset DEBUG=1" && exit 1)

      - name: "[TEST] Run container with IFACES=invalid ..."
        run: |
          set -o pipefail
          set +e
          docker run --privileged -e DEBUG=1 -e IFACES=invalid -v `pwd`/ruleset:/etc/sfunnel/ruleset sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -eq 0 ]; then
            echo "ERROR: container succeded when it should have FAILED!"
            exit 1
          fi
          set -e

      - name: "[TEST] Run container with DIRECTION=invalid ..."
        run: |
          set -o pipefail
          set +e
          docker run --privileged -e DEBUG=1 -e DIRECTION=invalid -v `pwd`/ruleset:/etc/sfunnel/ruleset sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -eq 0 ]; then
            echo "ERROR: container succeded when it should have FAILED!"
            exit 1
          fi
          set -e
          grep "FATAL: Invalid traffic direction" output || (echo "ERROR: unable to validate container correctly fails when DIRECTION is invalid" && exit 1)

      - name: "[TEST] Run container with DIRECTION=ingress ..."
        run: |
          set -o pipefail
          docker run --privileged -e DEBUG=1 -e DIRECTION=ingress -v `pwd`/ruleset:/etc/sfunnel/ruleset sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -ne 0 ]; then
            echo "ERROR: container execution FAILED!"
            exit 1
          fi
          (grep "Attaching BPF program" output | grep "direction 'ingress'") || (echo "ERROR: unable to validate container attaches to DIRECTION=ingress" && exit 1)

      - name: "[TEST] Run container with DIRECTION=egress ..."
        run: |
          set -o pipefail
          docker run --privileged -e DEBUG=1 -e DIRECTION=egress -v `pwd`/ruleset:/etc/sfunnel/ruleset sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -ne 0 ]; then
            echo "ERROR: container execution FAILED!"
            exit 1
          fi
          (grep "Attaching BPF program" output | grep "direction 'egress'") || (echo "ERROR: unable to validate container attaches to DIRECTION=egress" && exit 1)

      - name: "[TEST] Run container with DIRECTION=both ..."
        run: |
          set -o pipefail
          docker run --privileged -e DEBUG=1 -e DIRECTION=both -v `pwd`/ruleset:/etc/sfunnel/ruleset sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -ne 0 ]; then
            echo "ERROR: container execution FAILED!"
            exit 1
          fi
          (grep "Attaching BPF program" output | grep "direction 'ingress'") || (echo "ERROR: unable to validate container attaches to DIRECTION=both" && exit 1)
          (grep "Attaching BPF program" output | grep "direction 'egress'") || (echo "ERROR: unable to validate container attaches to DIRECTION=both" && exit 1)

      - name: "[TEST] Run container with CLEAN=1 ..."
        run: |
          set -o pipefail
          #Create a pair of veths
          sudo ip link add type veth
          sudo ip link set up dev veth0
          sudo ip link set up dev veth1

          #First attach to veth
          docker run --privileged --network=host -e DEBUG=1 -e DIRECTION=both -e IFACES=veth0 -v `pwd`/ruleset:/etc/sfunnel/ruleset sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -ne 0 ]; then
            echo "ERROR: container execution FAILED!"
            exit 1
          fi
          (tc filter show dev veth0 ingress | grep sfunnel) || (echo "ERROR: unable to validate container attaches to ingress" && exit 1)
          (tc filter show dev veth0 egress | grep sfunnel)  || (echo "ERROR: unable to validate container attaches to egress" && exit 1)

          #Run CLEAN=1
          docker run --privileged --network=host -e DEBUG=1 -e CLEAN=1 -e DIRECTION=both -e IFACES=veth0 sfunnel:latest 2>&1 | tee output
          [[ "$(tc filter show dev veth0 ingress)" == "" ]] || (echo "ERROR: unable to validate container removes BPF programs from ingress" && exit 1)
          [[ "$(tc filter show dev veth0 egress)" == "" ]] || (echo "ERROR: unable to validate container removes BPF programs from egress" && exit 1)

      - name: "[TEST] Run container with NETNS=test_ns ..."
        run: |
          set -o pipefail
          #Create a pair of veths
          sudo ip netns add test_ns
          sudo ip netns exec test_ns ip link set up dev lo

          #First run with an invalid netns, make sure it fails
          set +e
          docker run --privileged --network=host -v /var/run/netns:/var/run/netns -v `pwd`/ruleset:/etc/sfunnel/ruleset -e NETNS=test_ns_invalid -e DEBUG=1 -e IFACES=lo sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -eq 0 ]; then
            echo "ERROR: container succeded when it should have FAILED!"
            exit 1
          fi

          #Then run it with a valid netns but invalid IFACE, and make sure it propagates the error code
          docker run --privileged --network=host -v /var/run/netns:/var/run/netns -e NETNS=test_ns -e DEBUG=1 -e IFACES=lo2 sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -eq 0 ]; then
            echo "ERROR: container succeded when it should have FAILED!"
            exit 1
          fi
          set -e

          #Successful run
          docker run --privileged --network=host -v /var/run/netns:/var/run/netns -v `pwd`/ruleset:/etc/sfunnel/ruleset -e NETNS=test_ns -e DEBUG=1 -e IFACES=lo sfunnel:latest 2>&1 | tee output
          if [ ${PIPESTATUS[0]} -ne 0 ]; then
            echo "ERROR: container execution FAILED!"
            exit 1
          fi
          [[ "$(sudo ip netns exec test_ns tc filter show dev lo ingress | grep sfunnel)" != "" ]] || (echo "ERROR: unable to validate container attaches to ingress when NETNS is set" && exit 1)
          (grep "\$DEBUG='1'" output) || (echo "ERROR: unable to validate env. variables are passed to the NETNS execution" && exit 1)

      - name: "Push to ghcr"
        run: |
          cd sfunnel
          export TAG=$(git describe HEAD | sed 's/-.*$//g' | tr -d "v")
          export EXACT_TAG=$(git describe --exact-match --match "v*" || echo "")
          echo "TAG=${TAG}, EXACT_TAG=${EXACT_TAG}"
          if [[ "${EXACT_TAG}" != "" ]]; then
            echo "Pushing to ghcr.io..."
            docker buildx build --platform ${PLATFORMS} --push -f docker/Dockerfile . --tag ghcr.io/${GITHUB_REPOSITORY}:${TAG}
          fi