name: Kernel Test

on:
  pull_request:
    paths:
      - "**/*.go"
      - "**/*.c"
      - "**/*.h"
      - "go.mod"
      - "go.sum"
      - ".github/workflows/kernel-test.yml"

jobs:

  build:
    runs-on: ubuntu-22.04
    steps:
    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11

    - name: Set up Go
      uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe
      with:
        go-version: 1.21.0

    - name: Generate and build
      run: |
        git submodule update --init
        make GOFLAGS="-buildvcs=false" CC=clang

    - name: Store executable
      uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32
      with:
        name: dae
        path: dae

  test:
    runs-on: ubuntu-22.04
    name: Test
    needs: build
    strategy:
      fail-fast: false
      matrix:
        kernel: [ '5.10-v0.3', '5.15-v0.3', '6.3-main', 'bpf-next-20231030.012704' ]
    timeout-minutes: 10
    steps:
      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11

      - name: Retrieve stored executable
        uses: actions/download-artifact@v3
        with:
          name: dae
          path: dae

      - name: Provision LVH VMs
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          test-name: dae-test
          image-version: ${{ matrix.kernel }}
          host-mount: ./
          dns-resolver: '1.1.1.1'
          install-dependencies: 'true'
          cmd: |
            chmod +x /host/dae/dae

            apt update
            apt install -y unzip

      - name: Setup network
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex

            docker network create --ipv6 --subnet 2001:0DB8::/112 dae
            docker run -td --name v2ray --privileged --network dae -v /host:/host ubuntu:22.04 bash
            docker run -td --name dae --privileged --network dae -v /host:/host -v /sys:/sys ubuntu:22.04 bash

      - name: Setup v2ray server
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex
            cd /host

            curl -OL https://github.com/v2fly/v2ray-core/releases/download/v4.31.0/v2ray-linux-64.zip
            unzip v2ray-linux-64.zip
            docker cp ./v2ray v2ray:/usr/bin
            docker cp ./v2ctl v2ray:/usr/bin

            cat > ./v2ray.json <<!
            {
                "log": {
                    "access": "/host/v2ray.access.log",
                    "error": "/host/v2ray.error.log",
                    "loglevel": "warning"
                },
                "inbound": {
                    "port": 23333,
                    "protocol": "vmess",
                    "settings": {
                        "clients": [
                            {
                                "id": "b004539e-0d7b-7996-c378-fb040e42de70",
                                "level": 0,
                                "alterId": 0
                            }
                        ]
                    }
                },
                "outbound": {
                    "protocol": "freedom",
                    "settings": {}
                },
                "inboundDetour": [],
                "outboundDetour": []
            }
            !

            nohup docker exec v2ray v2ray -c /host/v2ray.json &> v2ray.log &
            sleep 5s
            cat v2ray.log

            echo '{"v":"2","ps":"test","add":"v2ray","port":"23333","id":"b004539e-0d7b-7996-c378-fb040e42de70","aid":"0","net":"tcp","tls":"","type":"none","path":"","host":"v2ray"}' > vmess.json

      - name: Setup dae server
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex
            cd /host

            docker exec dae apt update
            docker exec dae apt install -y curl dnsutils netcat

            vmess_link=$(base64 -w0 vmess.json)
            cat > ./conf.dae <<!
            global {
                tproxy_port: 12345
                log_level: trace

                lan_interface: auto
                wan_interface: auto
                allow_insecure: false
                auto_config_kernel_parameter: true
            }

            node {
                local: 'vmess://\$vmess_link'
            }

            group {
                proxy {
                    policy: min_moving_avg
                }
            }

            routing {
                pname(dae) -> direct
                fallback: proxy
            }
            !

            chmod 600 ./conf.dae
            nohup docker exec dae /host/dae/dae run -c /host/conf.dae &> dae.log &
            sleep 10s
            cat dae.log

      - name: Check WAN IPv4 TCP
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex

            docker exec dae curl 1.1.1.1:443
            cat /host/dae.log | grep -F -- '-> 1.1.1.1:443'
            cat /host/v2ray.access.log | grep -q 'accepted tcp:1.1.1.1:443'

      - name: Check WAN IPv4 UDP
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex

            docker exec dae dig @1.1.1.1 one.one.one.one
            cat /host/dae.log | grep -F -- '-> 1.1.1.1:53'
            cat /host/v2ray.access.log | grep -q 'accepted udp:1.1.1.1:53'

      - name: Check WAN IPv6 TCP
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex

            docker exec dae nc -v -w1 2606:4700:4700::1111 443 &> /host/nc.log
            cat /host/nc.log | grep -q 'succeeded!'
            cat /host/dae.log | grep -F -- '-> [2606:4700:4700::1111]:443'

      - name: Check WAN IPv6 UDP
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex

            if docker exec dae dig @2606:4700:4700::1111 one.one.one.one; then
              echo "Shouldn't succeed until https://github.com/daeuniverse/dae/issues/387 is resolved"
              false
            else
              echo "Ingore failure until https://github.com/daeuniverse/dae/issues/387 is resolved"
              true
            fi

      - name: Setup LAN
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex
            cd /host

            docker restart -t0 dae
            docker exec dae apt install -y iproute2 iptables iputils-ping

            cat >lan.bash <<!
            set -ex

            ip net a dae
            ip l a dae-veth type veth peer name dae-veth-peer
            ip l s dae-veth-peer up
            ip l s dae-veth netns dae
            ip net e dae ip l s dae-veth up
            ip r a 10.0.0.1 dev dae-veth-peer
            ip net e dae ip a a 10.0.0.1 dev dae-veth
            ip net e dae ip r a 169.254.0.1 dev dae-veth
            ip net e dae ip r a default via 169.254.0.1 dev dae-veth

            sysctl net.ipv6.conf.dae-veth-peer.disable_ipv6=0
            ip -6 r a fd00:ffff::1 dev dae-veth-peer
            ip -6 a a fe80::ecee:eeff:feee:eeee dev dae-veth-peer
            ip net e dae ip -6 a a fd00:ffff::1 dev dae-veth
            ip net e dae ip -6 r r default via fe80::ecee:eeff:feee:eeee dev dae-veth

            sysctl net.ipv4.conf.dae-veth-peer.proxy_arp=1
            sysctl net.ipv4.conf.dae-veth-peer.rp_filter=2
            iptables-legacy -t nat -A POSTROUTING -s 10.0.0.1/32 -j MASQUERADE
            !
            docker exec dae bash /host/lan.bash

            docker exec dae ping -c1 10.0.0.1
            docker exec dae ip net e dae curl 1.0.0.1
            docker exec dae ping -c1 fd00:ffff::1

            docker exec dae sysctl net.ipv4.conf.dae-veth-peer.send_redirects=0
            docker exec dae sysctl net.ipv6.conf.dae-veth-peer.forwarding=1

            vmess_link=$(base64 -w0 vmess.json)
            cat > ./conf.dae <<!
            global {
                tproxy_port: 12345
                log_level: trace

                lan_interface: dae-veth-peer
                wan_interface: auto
                allow_insecure: false
                auto_config_kernel_parameter: true
            }

            node {
                local: 'vmess://\$vmess_link'
            }

            group {
                proxy {
                    policy: min_moving_avg
                }
            }

            routing {
                pname(dae) -> direct
                fallback: proxy
            }
            !

            chmod 600 ./conf.dae
            nohup docker exec dae /host/dae/dae run -c /host/conf.dae &> dae.log &
            sleep 10s
            cat dae.log

      - name: Check LAN IPv4 TCP
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex

            docker exec dae ip net e dae curl 1.0.0.1
            cat /host/dae.log | grep -F -- '-> 1.0.0.1:80'
            cat /host/v2ray.access.log | grep -q 'accepted tcp:1.0.0.1:80'

      - name: Check LAN IPv4 UDP
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex

            docker exec dae ip net e dae dig @8.8.4.4 one.one.one.one
            cat /host/dae.log | grep -F -- '-> 8.8.4.4:53'
            cat /host/v2ray.access.log | grep -q 'accepted udp:8.8.4.4:53'

      - name: Check LAN IPv6 TCP
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex

            docker exec dae ip net e dae nc -v -w1 2606:4700:4700::1001 80 &> /host/nc.log
            cat /host/nc.log | grep -q 'succeeded!'
            cat /host/dae.log | grep -F -- '-> [2606:4700:4700::1001]:80'

      - name: Check LAN IPv6 UDP
        uses: cilium/little-vm-helper@908ab1ff8a596a03cd5221a1f8602dc44c3f906d # v0.0.12
        with:
          provision: 'false'
          cmd: |
            set -ex

            docker exec dae ip net e dae dig @2001:4860:4860::8844 one.one.one.one
            cat /host/dae.log | grep -F -- '-> [2001:4860:4860::8844]:53'