v1.6.1 (#752)

Update CHANGELOG for Nebula v1.6.1

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -0,0 +1,57 @@
+name: "\U0001F41B Bug Report"
+description: Report an issue or possible bug
+title: "\U0001F41B BUG:"
+labels: []
+assignees: []
+body:
+  - type: markdown
+    attributes:
+      value: |
+        ### Thank you for taking the time to file a bug report!
+        
+        Please fill out this form as completely as possible.
+
+  - type: input
+    id: version
+    attributes:
+      label: What version of `nebula` are you using?
+      placeholder: 0.0.0
+    validations:
+      required: true
+
+  - type: input
+    id: os
+    attributes:
+      label: What operating system are you using?
+      description: iOS and Android specific issues belong in the [mobile_nebula](https://github.com/DefinedNet/mobile_nebula) repo.
+      placeholder: Linux, Mac, Windows
+    validations:
+      required: true
+
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe the Bug
+      description: A clear and concise description of what the bug is.
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: Logs from affected hosts
+      description: |
+        Provide logs from all affected hosts during the time of the issue.
+        Improve formatting by using <code>```</code> at the beginning and end of each log block.
+    validations:
+      required: false
+
+  - type: textarea
+    id: configs
+    attributes:
+      label: Config files from affected hosts
+      description: |
+        Provide config files for all affected hosts.
+        Improve formatting by using <code>```</code> at the beginning and end of each config file.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,9 @@
+blank_issues_enabled: true
+contact_links:
+  - name: 📘 Documentation
+    url: https://www.defined.net/nebula/
+    about: Review documentation.
+
+  - name: 💁 Support/Chat
+    url: https://join.slack.com/t/nebulaoss/shared_invite/enQtOTA5MDI4NDg3MTg4LTkwY2EwNTI4NzQyMzc0M2ZlODBjNWI3NTY1MzhiOThiMmZlZjVkMTI0NGY4YTMyNjUwMWEyNzNkZTJmYzQxOGU
+    about: 'This issue tracker is not for support questions. Join us on Slack for assistance!'

.github/workflows/gofmt.yml

@@ -4,6 +4,9 @@ on:
     branches:
       - master
   pull_request:
+    paths:
+      - '.github/workflows/gofmt.yml'
+      - '**.go'
 jobs:
 
   gofmt:
@@ -11,19 +14,31 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.13
+    - name: Set up Go 1.18
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v2
       with:
-        go-version: 1.13
+        go-version: 1.18
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v1
+      uses: actions/checkout@v2
+
+    - uses: actions/cache@v2
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-gofmt1.18-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-gofmt1.18-
+
+    - name: Install goimports
+      run: |
+        go get golang.org/x/tools/cmd/goimports
+        go build golang.org/x/tools/cmd/goimports
 
     - name: gofmt
       run: |
-        if [ "$(find . -iname '*.go' | xargs gofmt -l)" ]
+        if [ "$(find . -iname '*.go' | grep -v '\.pb\.go$' | xargs ./goimports -l)" ]
         then
-          find . -iname '*.go' | xargs gofmt -d
+          find . -iname '*.go' | grep -v '\.pb\.go$' | xargs ./goimports -d
           exit 1
         fi

.github/workflows/release.yml

@@ -10,34 +10,34 @@ jobs:
     name: Build Linux All
     runs-on: ubuntu-latest
     steps:
-      - name: Set up Go 1.13
+      - name: Set up Go 1.18
-        uses: actions/setup-go@v1
+        uses: actions/setup-go@v2
         with:
-          go-version: 1.13
+          go-version: 1.18
 
       - name: Checkout code
         uses: actions/checkout@v2
 
       - name: Build
         run: |
-          make BUILD_NUMBER="${GITHUB_REF#refs/tags/v}" release-linux
+          make BUILD_NUMBER="${GITHUB_REF#refs/tags/v}" release-linux release-freebsd
           mkdir release
           mv build/*.tar.gz release
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v1
+        uses: actions/upload-artifact@v2
         with:
           name: linux-latest
           path: release
 
   build-windows:
-    name: Build Windows amd64
+    name: Build Windows
     runs-on: windows-latest
     steps:
-      - name: Set up Go 1.13
+      - name: Set up Go 1.18
-        uses: actions/setup-go@v1
+        uses: actions/setup-go@v2
         with:
-          go-version: 1.13
+          go-version: 1.18
 
       - name: Checkout code
         uses: actions/checkout@v2
@@ -45,63 +45,88 @@ jobs:
       - name: Build
         run: |
           echo $Env:GITHUB_REF.Substring(11)
-          go build -trimpath -ldflags "-X main.Build=$($Env:GITHUB_REF.Substring(11))" -o build\nebula.exe ./cmd/nebula-service
+          mkdir build\windows-amd64
-          go build -trimpath -ldflags "-X main.Build=$($Env:GITHUB_REF.Substring(11))" -o build\nebula-cert.exe ./cmd/nebula-cert
+          $Env:GOARCH = "amd64"
+          go build -trimpath -ldflags "-X main.Build=$($Env:GITHUB_REF.Substring(11))" -o build\windows-amd64\nebula.exe ./cmd/nebula-service
+          go build -trimpath -ldflags "-X main.Build=$($Env:GITHUB_REF.Substring(11))" -o build\windows-amd64\nebula-cert.exe ./cmd/nebula-cert
+          mkdir build\windows-arm64
+          $Env:GOARCH = "arm64"
+          go build -trimpath -ldflags "-X main.Build=$($Env:GITHUB_REF.Substring(11))" -o build\windows-arm64\nebula.exe ./cmd/nebula-service
+          go build -trimpath -ldflags "-X main.Build=$($Env:GITHUB_REF.Substring(11))" -o build\windows-arm64\nebula-cert.exe ./cmd/nebula-cert
+          mkdir build\dist\windows
+          mv dist\windows\wintun build\dist\windows\
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v1
+        uses: actions/upload-artifact@v2
         with:
           name: windows-latest
           path: build
 
   build-darwin:
-    name: Build Darwin amd64
+    name: Build Universal Darwin
-    runs-on: macOS-latest
+    env:
+      HAS_SIGNING_CREDS: ${{ secrets.AC_USERNAME != '' }}
+    runs-on: macos-11
     steps:
-      - name: Set up Go 1.13
+      - name: Set up Go 1.18
-        uses: actions/setup-go@v1
+        uses: actions/setup-go@v2
         with:
-          go-version: 1.13
+          go-version: 1.18
 
       - name: Checkout code
         uses: actions/checkout@v2
 
-      - name: Build
+      - name: Import certificates
+        if: env.HAS_SIGNING_CREDS == 'true'
+        uses: Apple-Actions/import-codesign-certs@v1
+        with:
+          p12-file-base64: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_P12_BASE64 }}
+          p12-password: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_PASSWORD }}
+
+      - name: Build, sign, and notarize
+        env:
+          AC_USERNAME: ${{ secrets.AC_USERNAME }}
+          AC_PASSWORD: ${{ secrets.AC_PASSWORD }}
         run: |
-          make BUILD_NUMBER="${GITHUB_REF#refs/tags/v}" service build/nebula-darwin-amd64.tar.gz
+          rm -rf release
           mkdir release
-          mv build/*.tar.gz release
+          make BUILD_NUMBER="${GITHUB_REF#refs/tags/v}" service build/darwin-amd64/nebula build/darwin-amd64/nebula-cert
+          make BUILD_NUMBER="${GITHUB_REF#refs/tags/v}" service build/darwin-arm64/nebula build/darwin-arm64/nebula-cert
+          lipo -create -output ./release/nebula ./build/darwin-amd64/nebula ./build/darwin-arm64/nebula
+          lipo -create -output ./release/nebula-cert ./build/darwin-amd64/nebula-cert ./build/darwin-arm64/nebula-cert
+
+          if [ -n "$AC_USERNAME" ]; then
+            codesign -s "10BC1FDDEB6CE753550156C0669109FAC49E4D1E" -f -v --timestamp --options=runtime -i "net.defined.nebula" ./release/nebula
+            codesign -s "10BC1FDDEB6CE753550156C0669109FAC49E4D1E" -f -v --timestamp --options=runtime -i "net.defined.nebula-cert" ./release/nebula-cert
+          fi
+
+          zip -j release/nebula-darwin.zip release/nebula-cert release/nebula
+
+          if [ -n "$AC_USERNAME" ]; then
+            xcrun notarytool submit ./release/nebula-darwin.zip --team-id "576H3XS7FP" --apple-id "$AC_USERNAME" --password "$AC_PASSWORD" --wait
+          fi
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v1
+        uses: actions/upload-artifact@v2
         with:
           name: darwin-latest
-          path: release
+          path: ./release/*
 
   release:
     name: Create and Upload Release
     needs: [build-linux, build-darwin, build-windows]
     runs-on: ubuntu-latest
     steps:
-      - name: Download Linux artifacts
+      - name: Download artifacts
-        uses: actions/download-artifact@v1
+        uses: actions/download-artifact@v2
-        with:
-          name: linux-latest
-
-      - name: Download Darwin artifacts
-        uses: actions/download-artifact@v1
-        with:
-          name: darwin-latest
-
-      - name: Download Windows artifacts
-        uses: actions/download-artifact@v1
-        with:
-          name: windows-latest
 
       - name: Zip Windows
         run: |
           cd windows-latest
-          zip nebula-windows-amd64.zip nebula.exe nebula-cert.exe
+          cp windows-amd64/* .
+          zip -r nebula-windows-amd64.zip nebula.exe nebula-cert.exe dist
+          cp windows-arm64/* .
+          zip -r nebula-windows-arm64.zip nebula.exe nebula-cert.exe dist
 
       - name: Create sha256sum
         run: |
@@ -111,9 +136,17 @@ jobs:
               cd $dir
               if [ "$dir" = windows-latest ]
               then
-                sha256sum <nebula.exe | sed 's=-$=nebula-windows-amd64.zip/nebula.exe='
+                sha256sum <windows-amd64/nebula.exe | sed 's=-$=nebula-windows-amd64.zip/nebula.exe='
-                sha256sum <nebula-cert.exe | sed 's=-$=nebula-windows-amd64.zip/nebula-cert.exe='
+                sha256sum <windows-amd64/nebula-cert.exe | sed 's=-$=nebula-windows-amd64.zip/nebula-cert.exe='
+                sha256sum <windows-arm64/nebula.exe | sed 's=-$=nebula-windows-arm64.zip/nebula.exe='
+                sha256sum <windows-arm64/nebula-cert.exe | sed 's=-$=nebula-windows-arm64.zip/nebula-cert.exe='
                 sha256sum nebula-windows-amd64.zip
+                sha256sum nebula-windows-arm64.zip
+              elif [ "$dir" = darwin-latest ]
+              then
+                sha256sum <nebula-darwin.zip | sed 's=-$=nebula-darwin.zip='
+                sha256sum <nebula | sed 's=-$=nebula-darwin.zip/nebula='
+                sha256sum <nebula-cert | sed 's=-$=nebula-darwin.zip/nebula-cert='
               else
                 for v in *.tar.gz
                 do
@@ -149,15 +182,15 @@ jobs:
           asset_name: SHASUM256.txt
           asset_content_type: text/plain
 
-      - name: Upload darwin-amd64
+      - name: Upload darwin zip
         uses: actions/upload-release-asset@v1.0.1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: ./darwin-latest/nebula-darwin-amd64.tar.gz
+          asset_path: ./darwin-latest/nebula-darwin.zip
-          asset_name: nebula-darwin-amd64.tar.gz
+          asset_name: nebula-darwin.zip
-          asset_content_type: application/gzip
+          asset_content_type: application/zip
 
       - name: Upload windows-amd64
         uses: actions/upload-release-asset@v1.0.1
@@ -169,6 +202,16 @@ jobs:
           asset_name: nebula-windows-amd64.zip
           asset_content_type: application/zip
 
+      - name: Upload windows-arm64
+        uses: actions/upload-release-asset@v1.0.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./windows-latest/nebula-windows-arm64.zip
+          asset_name: nebula-windows-arm64.zip
+          asset_content_type: application/zip
+
       - name: Upload linux-amd64
         uses: actions/upload-release-asset@v1.0.1
         env:
@@ -278,3 +321,33 @@ jobs:
           asset_path: ./linux-latest/nebula-linux-mips64le.tar.gz
           asset_name: nebula-linux-mips64le.tar.gz
           asset_content_type: application/gzip
+
+      - name: Upload linux-mips-softfloat
+        uses: actions/upload-release-asset@v1.0.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./linux-latest/nebula-linux-mips-softfloat.tar.gz
+          asset_name: nebula-linux-mips-softfloat.tar.gz
+          asset_content_type: application/gzip
+
+      - name: Upload linux-riscv64
+        uses: actions/upload-release-asset@v1.0.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./linux-latest/nebula-linux-riscv64.tar.gz
+          asset_name: nebula-linux-riscv64.tar.gz
+          asset_content_type: application/gzip
+
+      - name: Upload freebsd-amd64
+        uses: actions/upload-release-asset@v1.0.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./linux-latest/nebula-freebsd-amd64.tar.gz
+          asset_name: nebula-freebsd-amd64.tar.gz
+          asset_content_type: application/gzip

.github/workflows/smoke.yml

@@ -4,24 +4,38 @@ on:
     branches:
       - master
   pull_request:
+    paths:
+      - '.github/workflows/smoke**'
+      - '**Makefile'
+      - '**.go'
+      - '**.proto'
+      - 'go.mod'
+      - 'go.sum'
 jobs:
 
   smoke:
-    name: Run 3 node smoke test
+    name: Run multi node smoke test
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.13
+    - name: Set up Go 1.18
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v2
       with:
-        go-version: 1.13
+        go-version: 1.18
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v1
+      uses: actions/checkout@v2
+
+    - uses: actions/cache@v2
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go1.18-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go1.18-
 
     - name: build
-      run: make
+      run: make bin-docker
 
     - name: setup docker image
       working-directory: ./.github/workflows/smoke
@@ -31,4 +45,12 @@ jobs:
       working-directory: ./.github/workflows/smoke
       run: ./smoke.sh
 
+    - name: setup relay docker image
+      working-directory: ./.github/workflows/smoke
+      run: ./build-relay.sh
+
+    - name: run smoke relay
+      working-directory: ./.github/workflows/smoke
+      run: ./smoke-relay.sh
+
     timeout-minutes: 10

.github/workflows/smoke/Dockerfile

@@ -1,5 +1,7 @@
 FROM debian:buster
 
-ADD ./build /
+ADD ./build /nebula
 
-ENTRYPOINT ["/nebula"]
+WORKDIR /nebula
+
+ENTRYPOINT ["/nebula/nebula"]

.github/workflows/smoke/build-relay.sh

@@ -0,0 +1,44 @@
+#!/bin/sh
+
+set -e -x
+
+rm -rf ./build
+mkdir ./build
+
+(
+    cd build
+
+    cp ../../../../build/linux-amd64/nebula .
+    cp ../../../../build/linux-amd64/nebula-cert .
+
+    HOST="lighthouse1" AM_LIGHTHOUSE=true ../genconfig.sh >lighthouse1.yml <<EOF
+relay:
+  am_relay: true
+EOF
+
+    export LIGHTHOUSES="192.168.100.1 172.17.0.2:4242"
+    export REMOTE_ALLOW_LIST='{"172.17.0.4/32": false, "172.17.0.5/32": false}'
+
+    HOST="host2" ../genconfig.sh >host2.yml <<EOF
+relay:
+  relays:
+    - 192.168.100.1
+EOF
+
+    export REMOTE_ALLOW_LIST='{"172.17.0.3/32": false}'
+
+    HOST="host3" ../genconfig.sh >host3.yml
+
+    HOST="host4" ../genconfig.sh >host4.yml <<EOF
+relay:
+  use_relays: false
+EOF
+
+    ../../../../nebula-cert ca -name "Smoke Test"
+    ../../../../nebula-cert sign -name "lighthouse1" -groups "lighthouse,lighthouse1" -ip "192.168.100.1/24"
+    ../../../../nebula-cert sign -name "host2" -groups "host,host2" -ip "192.168.100.2/24"
+    ../../../../nebula-cert sign -name "host3" -groups "host,host3" -ip "192.168.100.3/24"
+    ../../../../nebula-cert sign -name "host4" -groups "host,host4" -ip "192.168.100.4/24"
+)
+
+sudo docker build -t nebula:smoke-relay .

.github/workflows/smoke/build.sh

@@ -8,17 +8,32 @@ mkdir ./build
 (
     cd build
 
-    cp ../../../../nebula .
+    cp ../../../../build/linux-amd64/nebula .
-    cp ../../../../nebula-cert .
+    cp ../../../../build/linux-amd64/nebula-cert .
 
-    HOST="lighthouse1" AM_LIGHTHOUSE=true ../genconfig.sh >lighthouse1.yml
+    HOST="lighthouse1" \
-    HOST="host2" LIGHTHOUSES="192.168.100.1 172.17.0.2:4242" ../genconfig.sh >host2.yml
+        AM_LIGHTHOUSE=true \
-    HOST="host3" LIGHTHOUSES="192.168.100.1 172.17.0.2:4242" ../genconfig.sh >host3.yml
+        ../genconfig.sh >lighthouse1.yml
 
-    ./nebula-cert ca -name "Smoke Test"
+    HOST="host2" \
-    ./nebula-cert sign -name "lighthouse1" -ip "192.168.100.1/24"
+        LIGHTHOUSES="192.168.100.1 172.17.0.2:4242" \
-    ./nebula-cert sign -name "host2" -ip "192.168.100.2/24"
+        ../genconfig.sh >host2.yml
-    ./nebula-cert sign -name "host3" -ip "192.168.100.3/24"
+
+    HOST="host3" \
+        LIGHTHOUSES="192.168.100.1 172.17.0.2:4242" \
+        INBOUND='[{"port": "any", "proto": "icmp", "group": "lighthouse"}]' \
+        ../genconfig.sh >host3.yml
+
+    HOST="host4" \
+        LIGHTHOUSES="192.168.100.1 172.17.0.2:4242" \
+        OUTBOUND='[{"port": "any", "proto": "icmp", "group": "lighthouse"}]' \
+        ../genconfig.sh >host4.yml
+
+    ../../../../nebula-cert ca -name "Smoke Test"
+    ../../../../nebula-cert sign -name "lighthouse1" -groups "lighthouse,lighthouse1" -ip "192.168.100.1/24"
+    ../../../../nebula-cert sign -name "host2" -groups "host,host2" -ip "192.168.100.2/24"
+    ../../../../nebula-cert sign -name "host3" -groups "host,host3" -ip "192.168.100.3/24"
+    ../../../../nebula-cert sign -name "host4" -groups "host,host4" -ip "192.168.100.4/24"
 )
 
-docker build -t nebula:smoke .
+sudo docker build -t nebula:smoke .

.github/workflows/smoke/genconfig.sh

@@ -2,6 +2,7 @@
 
 set -e
 
+FIREWALL_ALL='[{"port": "any", "proto": "any", "host": "any"}]'
 
 if [ "$STATIC_HOSTS" ] || [ "$LIGHTHOUSES" ]
 then
@@ -32,13 +33,14 @@ lighthouse_hosts() {
 
 cat <<EOF
 pki:
-  ca: /ca.crt
+  ca: ca.crt
-  cert: /${HOST}.crt
+  cert: ${HOST}.crt
-  key: /${HOST}.key
+  key: ${HOST}.key
 
 lighthouse:
   am_lighthouse: ${AM_LIGHTHOUSE:-false}
   hosts: $(lighthouse_hosts)
+  remote_allow_list: ${REMOTE_ALLOW_LIST}
 
 listen:
   host: 0.0.0.0
@@ -48,13 +50,8 @@ tun:
   dev: ${TUN_DEV:-nebula1}
 
 firewall:
-  outbound:
+  outbound: ${OUTBOUND:-$FIREWALL_ALL}
-    - port: any
+  inbound: ${INBOUND:-$FIREWALL_ALL}
-      proto: any
-      host: any
 
-  inbound:
+$(test -t 0 || cat)
-    - port: any
-      proto: any
-      host: any
 EOF

.github/workflows/smoke/smoke-relay.sh

@@ -0,0 +1,85 @@
+#!/bin/bash
+
+set -e -x
+
+set -o pipefail
+
+mkdir -p logs
+
+cleanup() {
+    echo
+    echo " *** cleanup"
+    echo
+
+    set +e
+    if [ "$(jobs -r)" ]
+    then
+        sudo docker kill lighthouse1 host2 host3 host4
+    fi
+}
+
+trap cleanup EXIT
+
+sudo docker run --name lighthouse1 --rm nebula:smoke-relay -config lighthouse1.yml -test
+sudo docker run --name host2 --rm nebula:smoke-relay -config host2.yml -test
+sudo docker run --name host3 --rm nebula:smoke-relay -config host3.yml -test
+sudo docker run --name host4 --rm nebula:smoke-relay -config host4.yml -test
+
+sudo docker run --name lighthouse1 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke-relay -config lighthouse1.yml 2>&1 | tee logs/lighthouse1 | sed -u 's/^/  [lighthouse1]  /' &
+sleep 1
+sudo docker run --name host2 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke-relay -config host2.yml 2>&1 | tee logs/host2 | sed -u 's/^/  [host2]  /' &
+sleep 1
+sudo docker run --name host3 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke-relay -config host3.yml 2>&1 | tee logs/host3 | sed -u 's/^/  [host3]  /' &
+sleep 1
+sudo docker run --name host4 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke-relay -config host4.yml 2>&1 | tee logs/host4 | sed -u 's/^/  [host4]  /' &
+sleep 1
+
+set +x
+echo
+echo " *** Testing ping from lighthouse1"
+echo
+set -x
+sudo docker exec lighthouse1 ping -c1 192.168.100.2
+sudo docker exec lighthouse1 ping -c1 192.168.100.3
+sudo docker exec lighthouse1 ping -c1 192.168.100.4
+
+set +x
+echo
+echo " *** Testing ping from host2"
+echo
+set -x
+sudo docker exec host2 ping -c1 192.168.100.1
+# Should fail because no relay configured in this direction
+! sudo docker exec host2 ping -c1 192.168.100.3 -w5 || exit 1
+! sudo docker exec host2 ping -c1 192.168.100.4 -w5 || exit 1
+
+set +x
+echo
+echo " *** Testing ping from host3"
+echo
+set -x
+sudo docker exec host3 ping -c1 192.168.100.1
+sudo docker exec host3 ping -c1 192.168.100.2
+sudo docker exec host3 ping -c1 192.168.100.4
+
+set +x
+echo
+echo " *** Testing ping from host4"
+echo
+set -x
+sudo docker exec host4 ping -c1 192.168.100.1
+# Should fail because relays not allowed
+! sudo docker exec host4 ping -c1 192.168.100.2 -w5 || exit 1
+sudo docker exec host4 ping -c1 192.168.100.3
+
+sudo docker exec host4 sh -c 'kill 1'
+sudo docker exec host3 sh -c 'kill 1'
+sudo docker exec host2 sh -c 'kill 1'
+sudo docker exec lighthouse1 sh -c 'kill 1'
+sleep 1
+
+if [ "$(jobs -r)" ]
+then
+    echo "nebula still running after SIGTERM sent" >&2
+    exit 1
+fi

.github/workflows/smoke/smoke.sh

@@ -1,12 +1,37 @@
-#!/bin/sh
+#!/bin/bash
 
 set -e -x
 
-docker run --name lighthouse1 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config lighthouse1.yml &
+set -o pipefail
+
+mkdir -p logs
+
+cleanup() {
+    echo
+    echo " *** cleanup"
+    echo
+
+    set +e
+    if [ "$(jobs -r)" ]
+    then
+        sudo docker kill lighthouse1 host2 host3 host4
+    fi
+}
+
+trap cleanup EXIT
+
+sudo docker run --name lighthouse1 --rm nebula:smoke -config lighthouse1.yml -test
+sudo docker run --name host2 --rm nebula:smoke -config host2.yml -test
+sudo docker run --name host3 --rm nebula:smoke -config host3.yml -test
+sudo docker run --name host4 --rm nebula:smoke -config host4.yml -test
+
+sudo docker run --name lighthouse1 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config lighthouse1.yml 2>&1 | tee logs/lighthouse1 | sed -u 's/^/  [lighthouse1]  /' &
 sleep 1
-docker run --name host2 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host2.yml &
+sudo docker run --name host2 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host2.yml 2>&1 | tee logs/host2 | sed -u 's/^/  [host2]  /' &
 sleep 1
-docker run --name host3 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host3.yml &
+sudo docker run --name host3 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host3.yml 2>&1 | tee logs/host3 | sed -u 's/^/  [host3]  /' &
+sleep 1
+sudo docker run --name host4 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host4.yml 2>&1 | tee logs/host4 | sed -u 's/^/  [host4]  /' &
 sleep 1
 
 set +x
@@ -14,21 +39,55 @@ echo
 echo " *** Testing ping from lighthouse1"
 echo
 set -x
-docker exec lighthouse1 ping -c1 192.168.100.2
+sudo docker exec lighthouse1 ping -c1 192.168.100.2
-docker exec lighthouse1 ping -c1 192.168.100.3
+sudo docker exec lighthouse1 ping -c1 192.168.100.3
 
 set +x
 echo
 echo " *** Testing ping from host2"
 echo
 set -x
-docker exec host2 ping -c1 192.168.100.1
+sudo docker exec host2 ping -c1 192.168.100.1
-docker exec host2 ping -c1 192.168.100.3
+# Should fail because not allowed by host3 inbound firewall
+! sudo docker exec host2 ping -c1 192.168.100.3 -w5 || exit 1
 
 set +x
 echo
 echo " *** Testing ping from host3"
 echo
 set -x
-docker exec host3 ping -c1 192.168.100.1
+sudo docker exec host3 ping -c1 192.168.100.1
-docker exec host3 ping -c1 192.168.100.2
+sudo docker exec host3 ping -c1 192.168.100.2
+
+set +x
+echo
+echo " *** Testing ping from host4"
+echo
+set -x
+sudo docker exec host4 ping -c1 192.168.100.1
+# Should fail because not allowed by host4 outbound firewall
+! sudo docker exec host4 ping -c1 192.168.100.2 -w5 || exit 1
+! sudo docker exec host4 ping -c1 192.168.100.3 -w5 || exit 1
+
+set +x
+echo
+echo " *** Testing conntrack"
+echo
+set -x
+# host2 can ping host3 now that host3 pinged it first
+sudo docker exec host2 ping -c1 192.168.100.3
+# host4 can ping host2 once conntrack established
+sudo docker exec host2 ping -c1 192.168.100.4
+sudo docker exec host4 ping -c1 192.168.100.2
+
+sudo docker exec host4 sh -c 'kill 1'
+sudo docker exec host3 sh -c 'kill 1'
+sudo docker exec host2 sh -c 'kill 1'
+sudo docker exec lighthouse1 sh -c 'kill 1'
+sleep 1
+
+if [ "$(jobs -r)" ]
+then
+    echo "nebula still running after SIGTERM sent" >&2
+    exit 1
+fi

.github/workflows/test.yml

@@ -4,6 +4,13 @@ on:
     branches:
       - master
   pull_request:
+    paths:
+      - '.github/workflows/test.yml'
+      - '**Makefile'
+      - '**.go'
+      - '**.proto'
+      - 'go.mod'
+      - 'go.sum'
 jobs:
 
   test-linux:
@@ -11,14 +18,21 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.13
+    - name: Set up Go 1.18
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v2
       with:
-        go-version: 1.13
+        go-version: 1.18
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v1
+      uses: actions/checkout@v2
+
+    - uses: actions/cache@v2
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go1.18-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go1.18-
 
     - name: Build
       run: make all
@@ -26,22 +40,38 @@ jobs:
     - name: Test
       run: make test
 
+    - name: End 2 end
+      run: make e2evv
+
+    - uses: actions/upload-artifact@v3
+      with:
+        name: e2e packet flow
+        path: e2e/mermaid/
+        if-no-files-found: warn
+
   test:
     name: Build and test on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [windows-latest, macOS-latest]
+        os: [windows-latest, macos-11]
     steps:
 
-    - name: Set up Go 1.13
+    - name: Set up Go 1.18
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v2
       with:
-        go-version: 1.13
+        go-version: 1.18
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v1
+      uses: actions/checkout@v2
+
+    - uses: actions/cache@v2
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go1.18-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go1.18-
 
     - name: Build nebula
       run: go build ./cmd/nebula
@@ -51,3 +81,12 @@ jobs:
 
     - name: Test
       run: go test -v ./...
+
+    - name: End 2 end
+      run: make e2evv
+
+    - uses: actions/upload-artifact@v3
+      with:
+        name: e2e packet flow
+        path: e2e/mermaid/
+        if-no-files-found: warn

.gitignore

@@ -10,3 +10,4 @@
 /cpu.pprof
 /build
 /*.tar.gz
+/e2e/mermaid/

CHANGELOG.md

@@ -7,6 +7,357 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.6.1] - 2022-09-26
+
+### Fixed
+
+- Refuse to process underlay packets received from overlay IPs. This prevents
+  confusion on hosts that have unsafe routes configured. (#741)
+
+- The ssh `reload` command did not work on Windows, since it relied on sending
+  a SIGHUP signal internally. This has been fixed. (#725)
+
+- A regression in v1.5.2 that broke unsafe routes on Mobile clients has been
+  fixed. (#729)
+
+## [1.6.0] - 2022-06-30
+
+### Added
+
+- Experimental: nebula clients can be configured to act as relays for other nebula clients.
+  Primarily useful when stubborn NATs make a direct tunnel impossible. (#678)
+
+- Configuration option to report manually specified `ip:port`s to lighthouses. (#650)
+
+- Windows arm64 build. (#638)
+
+- `punchy` and most `lighthouse` config options now support hot reloading. (#649)
+
+### Changed
+
+- Build against go 1.18. (#656)
+
+- Promoted `routines` config from experimental to supported feature. (#702)
+
+- Dependencies updated. (#664)
+
+### Fixed
+
+- Packets destined for the same host that sent it will be returned on MacOS.
+  This matches the default behavior of other operating systems. (#501)
+
+- `unsafe_route` configuration will no longer crash on Windows. (#648)
+
+- A few panics that were introduced in 1.5.x. (#657, #658, #675)
+
+### Security
+
+- You can set `listen.send_recv_error` to control the conditions in which
+  `recv_error` messages are sent. Sending these messages can expose the fact
+  that Nebula is running on a host, but it speeds up re-handshaking. (#670)
+
+### Removed
+
+- `x509` config stanza support has been removed. (#685)
+
+## [1.5.2] - 2021-12-14
+
+### Added
+
+- Warn when a non lighthouse node does not have lighthouse hosts configured. (#587)
+
+### Changed
+
+- No longer fatals if expired CA certificates are present in `pki.ca`, as long as 1 valid CA is present. (#599)
+
+- `nebula-cert` will now enforce ipv4 addresses. (#604)
+
+- Warn on macOS if an unsafe route cannot be created due to a collision with an
+  existing route. (#610)
+
+- Warn if you set a route MTU on platforms where we don't support it. (#611)
+
+### Fixed
+
+- Rare race condition when tearing down a tunnel due to `recv_error` and sending packets on another thread. (#590)
+
+- Bug in `routes` and `unsafe_routes` handling that was introduced in 1.5.0. (#595)
+
+- `-test` mode no longer results in a crash. (#602)
+
+### Removed
+
+- `x509.ca` config alias for `pki.ca`. (#604)
+
+### Security
+
+- Upgraded `golang.org/x/crypto` to address an issue which allowed unauthenticated clients to cause a panic in SSH
+  servers. (#603)
+
+## 1.5.1 - 2021-12-13
+
+(This release was skipped due to discovering #610 and #611 after the tag was
+created.)
+
+## [1.5.0] - 2021-11-11
+
+### Added
+
+- SSH `print-cert` has a new `-raw` flag to get the PEM representation of a certificate. (#483)
+
+- New build architecture: Linux `riscv64`. (#542)
+
+- New experimental config option `remote_allow_ranges`. (#540)
+
+- New config option `pki.disconnect_invalid` that will tear down tunnels when they become invalid (through expiry or
+  removal of root trust). Default is `false`. Note, this will not currently recognize if a remote has changed
+  certificates since the last handshake. (#370)
+
+- New config option `unsafe_routes.<route>.metric` will set a metric for a specific unsafe route. It's useful if you have
+  more than one identical route and want to prefer one against the other. (#353)
+
+### Changed
+
+- Build against go 1.17. (#553)
+
+- Build with `CGO_ENABLED=0` set, to create more portable binaries. This could
+  have an effect on DNS resolution if you rely on anything non-standard. (#421)
+
+- Windows now uses the [wintun](https://www.wintun.net/) driver which does not require installation. This driver
+  is a large improvement over the TAP driver that was used in previous versions. If you had a previous version
+  of `nebula` running, you will want to disable the tap driver in Control Panel, or uninstall the `tap0901` driver
+  before running this version. (#289)
+
+- Darwin binaries are now universal (works on both amd64 and arm64), signed, and shipped in a notarized zip file.
+  `nebula-darwin.zip` will be the only darwin release artifact. (#571)
+
+- Darwin uses syscalls and AF_ROUTE to configure the routing table, instead of
+  using `/sbin/route`. Setting `tun.dev` is now allowed on Darwin as well, it
+  must be in the format `utun[0-9]+` or it will be ignored. (#163)
+
+### Deprecated
+
+- The `preferred_ranges` option has been supported as a replacement for
+  `local_range` since v1.0.0. It has now been documented and `local_range`
+  has been officially deprecated. (#541)
+
+### Fixed
+
+- Valid recv_error packets were incorrectly marked as "spoofing" and ignored. (#482)
+
+- SSH server handles single `exec` requests correctly. (#483)
+
+- Signing a certificate with `nebula-cert sign` now verifies that the supplied
+  ca-key matches the ca-crt. (#503)
+
+- If `preferred_ranges` (or the deprecated `local_range`) is configured, we
+  will immediately switch to a preferred remote address after the reception of
+  a handshake packet (instead of waiting until 1,000 packets have been sent).
+  (#532)
+
+- A race condition when `punchy.respond` is enabled and ensures the correct
+  vpn ip is sent a punch back response in highly queried node. (#566)
+
+- Fix a rare crash during handshake due to a race condition. (#535)
+
+## [1.4.0] - 2021-05-11
+
+### Added
+
+- Ability to output qr code images in `print`, `ca`, and `sign` modes for `nebula-cert`.
+  This is useful when configuring mobile clients. (#297)
+
+- Experimental: Nebula can now do work on more than 2 cpu cores in send and receive paths via
+  the new `routines` config option. (#382, #391, #395)
+
+- ICMP ping requests can be responded to when the `tun.disabled` is `true`.
+  This is useful so that you can "ping" a lighthouse running in this mode. (#342)
+
+- Run smoke tests via `make smoke-docker`. (#287)
+
+- More reported stats, udp memory use on linux, build version (when using Prometheus), firewall,
+  handshake, and cached packet stats. (#390, #405, #450, #453)
+
+- IPv6 support for the underlay network. (#369)
+
+- End to end testing, run with `make e2e`. (#425, #427, #428)
+
+### Changed
+
+- Darwin will now log stdout/stderr to a file when using `-service` mode. (#303)
+
+- Example systemd unit file now better arranged startup order when using `sshd`
+  and other fixes. (#317, #412, #438)
+
+- Reduced memory utilization/garbage collection. (#320, #323, #340)
+
+- Reduced CPU utilization. (#329)
+
+- Build against go 1.16. (#381)
+
+- Refactored handshakes to improve performance and correctness. (#401, #402, #404, #416, #451)
+
+- Improved roaming support for mobile clients. (#394, #457)
+
+- Lighthouse performance and correctness improvements. (#406, #418, #429, #433, #437, #442, #449)
+
+- Better ordered startup to enable `sshd`, `stats`, and `dns` subsystems to listen on
+  the nebula interface. (#375)
+
+### Fixed
+
+- No longer report handshake packets as `lost` in stats. (#331)
+
+- Error handling in the `cert` package. (#339, #373)
+
+- Orphaned pending hostmap entries are cleaned up. (#344)
+
+- Most known data races are now resolved. (#396, #400, #424)
+
+- Refuse to run a lighthouse on an ephemeral port. (#399)
+
+- Removed the global references. (#423, #426, #446)
+
+- Reloading via ssh command avoids a panic. (#447)
+
+- Shutdown is now performed in a cleaner way. (#448)
+
+- Logs will now find their way to Windows event viewer when running under `-service` mode
+  in Windows. (#443)
+
+## [1.3.0] - 2020-09-22
+
+### Added
+
+- You can emit statistics about non-message packets by setting the option
+  `stats.message_metrics`. You can similarly emit detailed statistics about
+  lighthouse packets by setting the option `stats.lighthouse_metrics`. See
+  the example config for more details. (#230)
+
+- We now support freebsd/amd64. This is experimental, please give us feedback.
+  (#103)
+
+- We now release a binary for `linux/mips-softfloat` which has also been
+  stripped to reduce filesize and hopefully have a better chance on running on
+  small mips devices. (#231)
+
+- You can set `tun.disabled` to true to run a standalone lighthouse without a
+  tun device (and thus, without root). (#269)
+
+- You can set `logging.disable_timestamp` to remove timestamps from log lines,
+  which is useful when output is redirected to a logging system that already
+  adds timestamps. (#288)
+
+### Changed
+
+- Handshakes should now trigger faster, as we try to be proactive with sending
+  them instead of waiting for the next timer tick in most cases. (#246, #265)
+
+- Previously, we would drop the conntrack table whenever firewall rules were
+  changed during a SIGHUP. Now, we will maintain the table and just validate
+  that an entry still matches with the new rule set. (#233)
+
+- Debug logs for firewall drops now include the reason. (#220, #239)
+
+- Logs for handshakes now include the fingerprint of the remote host. (#262)
+
+- Config item `pki.blacklist` is now `pki.blocklist`. (#272)
+
+- Better support for older Linux kernels. We now only set `SO_REUSEPORT` if
+  `tun.routines` is greater than 1 (default is 1). We also only use the
+  `recvmmsg` syscall if `listen.batch` is greater than 1 (default is 64).
+  (#275)
+
+- It is possible to run Nebula as a library inside of another process now.
+  Note that this is still experimental and the internal APIs around this might
+  change in minor version releases. (#279)
+
+### Deprecated
+
+- `pki.blacklist` is deprecated in favor of `pki.blocklist` with the same
+   functionality. Existing configs will continue to load for this release to
+   allow for migrations. (#272)
+
+### Fixed
+
+- `advmss` is now set correctly for each route table entry when `tun.routes`
+  is configured to have some routes with higher MTU. (#245)
+
+- Packets that arrive on the tun device with an unroutable destination IP are
+  now dropped correctly, instead of wasting time making queries to the
+  lighthouses for IP `0.0.0.0` (#267)
+
+## [1.2.0] - 2020-04-08
+
+### Added
+
+- Add `logging.timestamp_format` config option. The primary purpose of this
+  change is to allow logging timestamps with millisecond precision. (#187)
+
+- Support `unsafe_routes` on Windows. (#184)
+
+- Add `lighthouse.remote_allow_list` to filter which subnets we will use to
+  handshake with other hosts. See the example config for more details. (#217)
+
+- Add `lighthouse.local_allow_list` to filter which local IP addresses and/or
+  interfaces we advertise to the lighthouses. See the example config for more
+  details. (#217)
+
+- Wireshark dissector plugin. Add this file in `dist/wireshark` to your
+  Wireshark plugins folder to see Nebula packet headers decoded. (#216)
+
+- systemd unit for Arch, so it can be built entirely from this repo. (#216)
+
+### Changed
+
+- Added a delay to punching via lighthouse signal to deal with race conditions
+  in some linux conntrack implementations. (#210)
+
+  See deprecated, this also adds a new `punchy.delay` option that defaults to `1s`.
+
+- Validate all `lighthouse.hosts` and `static_host_map` VPN IPs are in the
+  subnet defined in our cert. Exit with a fatal error if they are not in our
+  subnet, as this is an invalid configuration (we will not have the proper
+  routes set up to communicate with these hosts). (#170)
+
+- Use absolute paths to system binaries on macOS and Windows. (#191)
+
+- Add configuration options for `handshakes`. This includes options to tweak
+  `try_interval`, `retries` and `wait_rotation`. See example config for
+  descriptions. (#179)
+
+- Allow `-config` file to not end in `.yaml` or `yml`. Useful when using
+  `-test` and automated tools like Ansible that create temporary files without
+  suffixes. (#189)
+
+- The config test mode, `-test`, is now more thorough and catches more parsing
+  issues. (#177)
+
+- Various documentation and example fixes. (#196)
+
+- Improved log messages. (#181, #200)
+
+- Dependencies updated. (#188)
+
+### Deprecated
+
+- `punchy`, `punch_back` configuration options have been collapsed under the
+  now top level `punchy` config directive. (#210)
+
+  `punchy.punch` - This is the old `punchy` option. Should we perform NAT hole
+  punching (default false)?
+
+  `punchy.respond` - This is the old `punch_back` option. Should we respond to
+  hole punching by hole punching back (default false)?
+
+### Fixed
+
+- Reduce memory allocations when not using `unsafe_routes`. (#198)
+
+- Ignore packets from self to self. (#192)
+
+- MTU fixed for `unsafe_routes`. (#209)
+
 ## [1.1.0] - 2020-01-17
 
 ### Added
@@ -47,6 +398,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Initial public release.
 
-[Unreleased]: https://github.com/slackhq/nebula/compare/v1.1.0...HEAD
+[Unreleased]: https://github.com/slackhq/nebula/compare/v1.6.1...HEAD
+[1.6.1]: https://github.com/slackhq/nebula/releases/tag/v1.6.1
+[1.6.0]: https://github.com/slackhq/nebula/releases/tag/v1.6.0
+[1.5.2]: https://github.com/slackhq/nebula/releases/tag/v1.5.2
+[1.5.0]: https://github.com/slackhq/nebula/releases/tag/v1.5.0
+[1.4.0]: https://github.com/slackhq/nebula/releases/tag/v1.4.0
+[1.3.0]: https://github.com/slackhq/nebula/releases/tag/v1.3.0
+[1.2.0]: https://github.com/slackhq/nebula/releases/tag/v1.2.0
 [1.1.0]: https://github.com/slackhq/nebula/releases/tag/v1.1.0
 [1.0.0]: https://github.com/slackhq/nebula/releases/tag/v1.0.0

Makefile

@@ -1,7 +1,34 @@
+GOMINVERSION = 1.18
 NEBULA_CMD_PATH = "./cmd/nebula"
-BUILD_NUMBER ?= dev+$(shell date -u '+%Y%m%d%H%M%S')
 GO111MODULE = on
 export GO111MODULE
+CGO_ENABLED = 0
+export CGO_ENABLED
+
+# Set up OS specific bits
+ifeq ($(OS),Windows_NT)
+	#TODO: we should be able to ditch awk as well
+	GOVERSION := $(shell go version | awk "{print substr($$3, 3)}")
+	GOISMIN := $(shell IF "$(GOVERSION)" GEQ "$(GOMINVERSION)" ECHO 1)
+	NEBULA_CMD_SUFFIX = .exe
+	NULL_FILE = nul
+else
+	GOVERSION := $(shell go version | awk '{print substr($$3, 3)}')
+	GOISMIN := $(shell expr "$(GOVERSION)" ">=" "$(GOMINVERSION)")
+	NEBULA_CMD_SUFFIX =
+	NULL_FILE = /dev/null
+endif
+
+# Only defined the build number if we haven't already
+ifndef BUILD_NUMBER
+	ifeq ($(shell git describe --exact-match 2>$(NULL_FILE)),)
+		BUILD_NUMBER = $(shell git describe --abbrev=0 --match "v*" | cut -dv -f2)-$(shell git branch --show-current)-$(shell git describe --long --dirty | cut -d- -f2-)
+	else
+		BUILD_NUMBER = $(shell git describe --exact-match --dirty | cut -dv -f2)
+	endif
+endif
+
+LDFLAGS = -X main.Build=$(BUILD_NUMBER)
 
 ALL_LINUX = linux-amd64 \
 	linux-386 \
@@ -13,11 +40,34 @@ ALL_LINUX = linux-amd64 \
 	linux-mips \
 	linux-mipsle \
 	linux-mips64 \
-	linux-mips64le
+	linux-mips64le \
+	linux-mips-softfloat \
+	linux-riscv64
 
 ALL = $(ALL_LINUX) \
 	darwin-amd64 \
-	windows-amd64
+	darwin-arm64 \
+	freebsd-amd64 \
+	windows-amd64 \
+	windows-arm64
+
+e2e:
+	$(TEST_ENV) go test -tags=e2e_testing -count=1 $(TEST_FLAGS) ./e2e
+
+e2ev: TEST_FLAGS = -v
+e2ev: e2e
+
+e2evv: TEST_ENV += TEST_LOGS=1
+e2evv: e2ev
+
+e2evvv: TEST_ENV += TEST_LOGS=2
+e2evvv: e2ev
+
+e2evvvv: TEST_ENV += TEST_LOGS=3
+e2evvvv: e2ev
+
+e2e-bench: TEST_FLAGS = -bench=. -benchmem -run=^$
+e2e-bench: e2e
 
 all: $(ALL:%=build/%/nebula) $(ALL:%=build/%/nebula-cert)
 
@@ -25,31 +75,45 @@ release: $(ALL:%=build/nebula-%.tar.gz)
 
 release-linux: $(ALL_LINUX:%=build/nebula-%.tar.gz)
 
+release-freebsd: build/nebula-freebsd-amd64.tar.gz
+
+BUILD_ARGS = -trimpath
+
 bin-windows: build/windows-amd64/nebula.exe build/windows-amd64/nebula-cert.exe
 	mv $? .
 
+bin-windows-arm64: build/windows-arm64/nebula.exe build/windows-arm64/nebula-cert.exe
+	mv $? .
+
 bin-darwin: build/darwin-amd64/nebula build/darwin-amd64/nebula-cert
 	mv $? .
 
+bin-freebsd: build/freebsd-amd64/nebula build/freebsd-amd64/nebula-cert
+	mv $? .
+
 bin:
-	go build -trimpath -ldflags "-X main.Build=$(BUILD_NUMBER)" -o ./nebula ${NEBULA_CMD_PATH}
+	go build $(BUILD_ARGS) -ldflags "$(LDFLAGS)" -o ./nebula${NEBULA_CMD_SUFFIX} ${NEBULA_CMD_PATH}
-	go build -trimpath -ldflags "-X main.Build=$(BUILD_NUMBER)" -o ./nebula-cert ./cmd/nebula-cert
+	go build $(BUILD_ARGS) -ldflags "$(LDFLAGS)" -o ./nebula-cert${NEBULA_CMD_SUFFIX} ./cmd/nebula-cert
 
 install:
-	go install -trimpath -ldflags "-X main.Build=$(BUILD_NUMBER)" ${NEBULA_CMD_PATH}
+	go install $(BUILD_ARGS) -ldflags "$(LDFLAGS)" ${NEBULA_CMD_PATH}
-	go install -trimpath -ldflags "-X main.Build=$(BUILD_NUMBER)" ./cmd/nebula-cert
+	go install $(BUILD_ARGS) -ldflags "$(LDFLAGS)" ./cmd/nebula-cert
+
+build/linux-arm-%: GOENV += GOARM=$(word 3, $(subst -, ,$*))
+build/linux-mips-%: GOENV += GOMIPS=$(word 3, $(subst -, ,$*))
+
+# Build an extra small binary for mips-softfloat
+build/linux-mips-softfloat/%: LDFLAGS += -s -w
 
 build/%/nebula: .FORCE
 	GOOS=$(firstword $(subst -, , $*)) \
-		GOARCH=$(word 2, $(subst -, ,$*)) \
+		GOARCH=$(word 2, $(subst -, ,$*)) $(GOENV) \
-		GOARM=$(word 3, $(subst -, ,$*)) \
+		go build $(BUILD_ARGS) -o $@ -ldflags "$(LDFLAGS)" ${NEBULA_CMD_PATH}
-		go build -trimpath -o $@ -ldflags "-X main.Build=$(BUILD_NUMBER)" ${NEBULA_CMD_PATH}
 
 build/%/nebula-cert: .FORCE
 	GOOS=$(firstword $(subst -, , $*)) \
-		GOARCH=$(word 2, $(subst -, ,$*)) \
+		GOARCH=$(word 2, $(subst -, ,$*)) $(GOENV) \
-		GOARM=$(word 3, $(subst -, ,$*)) \
+		go build $(BUILD_ARGS) -o $@ -ldflags "$(LDFLAGS)" ./cmd/nebula-cert
-		go build -trimpath -o $@ -ldflags "-X main.Build=$(BUILD_NUMBER)" ./cmd/nebula-cert
 
 build/%/nebula.exe: build/%/nebula
 	mv $< $@
@@ -87,20 +151,33 @@ bench-cpu-long:
 proto: nebula.pb.go cert/cert.pb.go
 
 nebula.pb.go: nebula.proto .FORCE
-	go build github.com/golang/protobuf/protoc-gen-go
+	go build github.com/gogo/protobuf/protoc-gen-gogofaster
-	PATH="$(PWD):$(PATH)" protoc --go_out=. $<
+	PATH="$(CURDIR):$(PATH)" protoc --gogofaster_out=paths=source_relative:. $<
-	rm protoc-gen-go
+	rm protoc-gen-gogofaster
 
 cert/cert.pb.go: cert/cert.proto .FORCE
 	$(MAKE) -C cert cert.pb.go
 
 service:
-	@echo > /dev/null
+	@echo > $(NULL_FILE)
 	$(eval NEBULA_CMD_PATH := "./cmd/nebula-service")
 ifeq ($(words $(MAKECMDGOALS)),1)
-	$(MAKE) service ${.DEFAULT_GOAL} --no-print-directory
+	@$(MAKE) service ${.DEFAULT_GOAL} --no-print-directory
 endif
 
+bin-docker: bin build/linux-amd64/nebula build/linux-amd64/nebula-cert
+
+smoke-docker: bin-docker
+	cd .github/workflows/smoke/ && ./build.sh
+	cd .github/workflows/smoke/ && ./smoke.sh
+
+smoke-relay-docker: bin-docker
+	cd .github/workflows/smoke/ && ./build-relay.sh
+	cd .github/workflows/smoke/ && ./smoke-relay.sh
+
+smoke-docker-race: BUILD_ARGS = -race
+smoke-docker-race: smoke-docker
+
 .FORCE:
-.PHONY: test test-cov-html bench bench-cpu bench-cpu-long bin proto release service
+.PHONY: e2e e2ev e2evv e2evvv e2evvvv test test-cov-html bench bench-cpu bench-cpu-long bin proto release service smoke-docker smoke-docker-race
 .DEFAULT_GOAL := bin

README.md

@@ -1,7 +1,6 @@
-## What is Nebula?
+## What is Nebula?
 Nebula is a scalable overlay networking tool with a focus on performance, simplicity and security.
-It lets you seamlessly connect computers anywhere in the world. Nebula is portable, and runs on Linux, OSX, and Windows.
+It lets you seamlessly connect computers anywhere in the world. Nebula is portable, and runs on Linux, OSX, Windows, iOS, and Android.
-(Also: keep this quiet, but we have an early prototype running on iOS).
 It can be used to connect a small number of computers, but is also able to connect tens of thousands of computers.
 
 Nebula incorporates a number of existing concepts like encryption, security groups, certificates,
@@ -9,9 +8,39 @@ and tunneling, and each of those individual pieces existed before Nebula in vari
 What makes Nebula different to existing offerings is that it brings all of these ideas together,
 resulting in a sum that is greater than its individual parts.
 
+Further documentation can be found [here](https://www.defined.net/nebula/).
+
 You can read more about Nebula [here](https://medium.com/p/884110a5579).
 
-You can also join the NebulaOSS Slack group [here](https://join.slack.com/t/nebulaoss/shared_invite/enQtOTA5MDI4NDg3MTg4LTkwY2EwNTI4NzQyMzc0M2ZlODBjNWI3NTY1MzhiOThiMmZlZjVkMTI0NGY4YTMyNjUwMWEyNzNkZTJmYzQxOGU)
+You can also join the NebulaOSS Slack group [here](https://join.slack.com/t/nebulaoss/shared_invite/enQtOTA5MDI4NDg3MTg4LTkwY2EwNTI4NzQyMzc0M2ZlODBjNWI3NTY1MzhiOThiMmZlZjVkMTI0NGY4YTMyNjUwMWEyNzNkZTJmYzQxOGU).
+
+## Supported Platforms
+
+#### Desktop and Server
+
+Check the [releases](https://github.com/slackhq/nebula/releases/latest) page for downloads or see the [Distribution Packages](https://github.com/slackhq/nebula#distribution-packages) section.
+
+- Linux - 64 and 32 bit, arm, and others
+- Windows
+- MacOS
+- Freebsd
+
+#### Distribution Packages
+
+- [Arch Linux](https://archlinux.org/packages/community/x86_64/nebula/)
+    ```
+    $ sudo pacman -S nebula
+    ```
+- [Fedora Linux](https://copr.fedorainfracloud.org/coprs/jdoss/nebula/)
+    ```
+    $ sudo dnf copr enable jdoss/nebula
+    $ sudo dnf install nebula
+    ```
+
+#### Mobile
+
+- [iOS](https://apps.apple.com/us/app/mobile-nebula/id1509587936?itsct=apps_box&itscg=30200)
+- [Android](https://play.google.com/store/apps/details?id=net.defined.mobile_nebula&pcampaignid=pcampaignidMKT-Other-global-all-co-prtnr-py-PartBadge-Mar2515-1)
 
 ## Technical Overview
 
@@ -21,15 +50,15 @@ Nebula's user-defined groups allow for provider agnostic traffic filtering betwe
 Discovery nodes allow individual peers to find each other and optionally use UDP hole punching to establish connections from behind most firewalls or NATs.
 Users can move data between nodes in any number of cloud service providers, datacenters, and endpoints, without needing to maintain a particular addressing scheme.
 
-Nebula uses elliptic curve Diffie-Hellman key exchange, and AES-256-GCM in its default configuration.
+Nebula uses Elliptic-curve Diffie-Hellman (`ECDH`) key exchange and `AES-256-GCM` in its default configuration.
 
-Nebula was created to provide a mechanism for groups hosts to communicate securely, even across the internet, while enabling expressive firewall definitions similar in style to cloud security groups.
+Nebula was created to provide a mechanism for groups of hosts to communicate securely, even across the internet, while enabling expressive firewall definitions similar in style to cloud security groups.
 
 ## Getting started (quickly)
 
 To set up a Nebula network, you'll need:
 
-#### 1. The [Nebula binaries](https://github.com/slackhq/nebula/releases) for your specific platform. Specifically you'll need `nebula-cert` and the specific nebula binary for each platform you use.
+#### 1. The [Nebula binaries](https://github.com/slackhq/nebula/releases) or [Distribution Packages](https://github.com/slackhq/nebula#distribution-packages) for your specific platform. Specifically you'll need `nebula-cert` and the specific nebula binary for each platform you use.
 
 #### 2. (Optional, but you really should..) At least one discovery node with a routable IP address, which we call a lighthouse.
 

allow_list.go

@@ -0,0 +1,361 @@
+package nebula
+
+import (
+	"fmt"
+	"net"
+	"regexp"
+
+	"github.com/slackhq/nebula/cidr"
+	"github.com/slackhq/nebula/config"
+	"github.com/slackhq/nebula/iputil"
+)
+
+type AllowList struct {
+	// The values of this cidrTree are `bool`, signifying allow/deny
+	cidrTree *cidr.Tree6
+}
+
+type RemoteAllowList struct {
+	AllowList *AllowList
+
+	// Inside Range Specific, keys of this tree are inside CIDRs and values
+	// are *AllowList
+	insideAllowLists *cidr.Tree6
+}
+
+type LocalAllowList struct {
+	AllowList *AllowList
+
+	// To avoid ambiguity, all rules must be true, or all rules must be false.
+	nameRules []AllowListNameRule
+}
+
+type AllowListNameRule struct {
+	Name  *regexp.Regexp
+	Allow bool
+}
+
+func NewLocalAllowListFromConfig(c *config.C, k string) (*LocalAllowList, error) {
+	var nameRules []AllowListNameRule
+	handleKey := func(key string, value interface{}) (bool, error) {
+		if key == "interfaces" {
+			var err error
+			nameRules, err = getAllowListInterfaces(k, value)
+			if err != nil {
+				return false, err
+			}
+
+			return true, nil
+		}
+		return false, nil
+	}
+
+	al, err := newAllowListFromConfig(c, k, handleKey)
+	if err != nil {
+		return nil, err
+	}
+	return &LocalAllowList{AllowList: al, nameRules: nameRules}, nil
+}
+
+func NewRemoteAllowListFromConfig(c *config.C, k, rangesKey string) (*RemoteAllowList, error) {
+	al, err := newAllowListFromConfig(c, k, nil)
+	if err != nil {
+		return nil, err
+	}
+	remoteAllowRanges, err := getRemoteAllowRanges(c, rangesKey)
+	if err != nil {
+		return nil, err
+	}
+	return &RemoteAllowList{AllowList: al, insideAllowLists: remoteAllowRanges}, nil
+}
+
+// If the handleKey func returns true, the rest of the parsing is skipped
+// for this key. This allows parsing of special values like `interfaces`.
+func newAllowListFromConfig(c *config.C, k string, handleKey func(key string, value interface{}) (bool, error)) (*AllowList, error) {
+	r := c.Get(k)
+	if r == nil {
+		return nil, nil
+	}
+
+	return newAllowList(k, r, handleKey)
+}
+
+// If the handleKey func returns true, the rest of the parsing is skipped
+// for this key. This allows parsing of special values like `interfaces`.
+func newAllowList(k string, raw interface{}, handleKey func(key string, value interface{}) (bool, error)) (*AllowList, error) {
+	rawMap, ok := raw.(map[interface{}]interface{})
+	if !ok {
+		return nil, fmt.Errorf("config `%s` has invalid type: %T", k, raw)
+	}
+
+	tree := cidr.NewTree6()
+
+	// Keep track of the rules we have added for both ipv4 and ipv6
+	type allowListRules struct {
+		firstValue     bool
+		allValuesMatch bool
+		defaultSet     bool
+		allValues      bool
+	}
+
+	rules4 := allowListRules{firstValue: true, allValuesMatch: true, defaultSet: false}
+	rules6 := allowListRules{firstValue: true, allValuesMatch: true, defaultSet: false}
+
+	for rawKey, rawValue := range rawMap {
+		rawCIDR, ok := rawKey.(string)
+		if !ok {
+			return nil, fmt.Errorf("config `%s` has invalid key (type %T): %v", k, rawKey, rawKey)
+		}
+
+		if handleKey != nil {
+			handled, err := handleKey(rawCIDR, rawValue)
+			if err != nil {
+				return nil, err
+			}
+			if handled {
+				continue
+			}
+		}
+
+		value, ok := rawValue.(bool)
+		if !ok {
+			return nil, fmt.Errorf("config `%s` has invalid value (type %T): %v", k, rawValue, rawValue)
+		}
+
+		_, ipNet, err := net.ParseCIDR(rawCIDR)
+		if err != nil {
+			return nil, fmt.Errorf("config `%s` has invalid CIDR: %s", k, rawCIDR)
+		}
+
+		// TODO: should we error on duplicate CIDRs in the config?
+		tree.AddCIDR(ipNet, value)
+
+		maskBits, maskSize := ipNet.Mask.Size()
+
+		var rules *allowListRules
+		if maskSize == 32 {
+			rules = &rules4
+		} else {
+			rules = &rules6
+		}
+
+		if rules.firstValue {
+			rules.allValues = value
+			rules.firstValue = false
+		} else {
+			if value != rules.allValues {
+				rules.allValuesMatch = false
+			}
+		}
+
+		// Check if this is 0.0.0.0/0 or ::/0
+		if maskBits == 0 {
+			rules.defaultSet = true
+		}
+	}
+
+	if !rules4.defaultSet {
+		if rules4.allValuesMatch {
+			_, zeroCIDR, _ := net.ParseCIDR("0.0.0.0/0")
+			tree.AddCIDR(zeroCIDR, !rules4.allValues)
+		} else {
+			return nil, fmt.Errorf("config `%s` contains both true and false rules, but no default set for 0.0.0.0/0", k)
+		}
+	}
+
+	if !rules6.defaultSet {
+		if rules6.allValuesMatch {
+			_, zeroCIDR, _ := net.ParseCIDR("::/0")
+			tree.AddCIDR(zeroCIDR, !rules6.allValues)
+		} else {
+			return nil, fmt.Errorf("config `%s` contains both true and false rules, but no default set for ::/0", k)
+		}
+	}
+
+	return &AllowList{cidrTree: tree}, nil
+}
+
+func getAllowListInterfaces(k string, v interface{}) ([]AllowListNameRule, error) {
+	var nameRules []AllowListNameRule
+
+	rawRules, ok := v.(map[interface{}]interface{})
+	if !ok {
+		return nil, fmt.Errorf("config `%s.interfaces` is invalid (type %T): %v", k, v, v)
+	}
+
+	firstEntry := true
+	var allValues bool
+	for rawName, rawAllow := range rawRules {
+		name, ok := rawName.(string)
+		if !ok {
+			return nil, fmt.Errorf("config `%s.interfaces` has invalid key (type %T): %v", k, rawName, rawName)
+		}
+		allow, ok := rawAllow.(bool)
+		if !ok {
+			return nil, fmt.Errorf("config `%s.interfaces` has invalid value (type %T): %v", k, rawAllow, rawAllow)
+		}
+
+		nameRE, err := regexp.Compile("^" + name + "$")
+		if err != nil {
+			return nil, fmt.Errorf("config `%s.interfaces` has invalid key: %s: %v", k, name, err)
+		}
+
+		nameRules = append(nameRules, AllowListNameRule{
+			Name:  nameRE,
+			Allow: allow,
+		})
+
+		if firstEntry {
+			allValues = allow
+			firstEntry = false
+		} else {
+			if allow != allValues {
+				return nil, fmt.Errorf("config `%s.interfaces` values must all be the same true/false value", k)
+			}
+		}
+	}
+
+	return nameRules, nil
+}
+
+func getRemoteAllowRanges(c *config.C, k string) (*cidr.Tree6, error) {
+	value := c.Get(k)
+	if value == nil {
+		return nil, nil
+	}
+
+	remoteAllowRanges := cidr.NewTree6()
+
+	rawMap, ok := value.(map[interface{}]interface{})
+	if !ok {
+		return nil, fmt.Errorf("config `%s` has invalid type: %T", k, value)
+	}
+	for rawKey, rawValue := range rawMap {
+		rawCIDR, ok := rawKey.(string)
+		if !ok {
+			return nil, fmt.Errorf("config `%s` has invalid key (type %T): %v", k, rawKey, rawKey)
+		}
+
+		allowList, err := newAllowList(fmt.Sprintf("%s.%s", k, rawCIDR), rawValue, nil)
+		if err != nil {
+			return nil, err
+		}
+
+		_, ipNet, err := net.ParseCIDR(rawCIDR)
+		if err != nil {
+			return nil, fmt.Errorf("config `%s` has invalid CIDR: %s", k, rawCIDR)
+		}
+
+		remoteAllowRanges.AddCIDR(ipNet, allowList)
+	}
+
+	return remoteAllowRanges, nil
+}
+
+func (al *AllowList) Allow(ip net.IP) bool {
+	if al == nil {
+		return true
+	}
+
+	result := al.cidrTree.MostSpecificContains(ip)
+	switch v := result.(type) {
+	case bool:
+		return v
+	default:
+		panic(fmt.Errorf("invalid state, allowlist returned: %T %v", result, result))
+	}
+}
+
+func (al *AllowList) AllowIpV4(ip iputil.VpnIp) bool {
+	if al == nil {
+		return true
+	}
+
+	result := al.cidrTree.MostSpecificContainsIpV4(ip)
+	switch v := result.(type) {
+	case bool:
+		return v
+	default:
+		panic(fmt.Errorf("invalid state, allowlist returned: %T %v", result, result))
+	}
+}
+
+func (al *AllowList) AllowIpV6(hi, lo uint64) bool {
+	if al == nil {
+		return true
+	}
+
+	result := al.cidrTree.MostSpecificContainsIpV6(hi, lo)
+	switch v := result.(type) {
+	case bool:
+		return v
+	default:
+		panic(fmt.Errorf("invalid state, allowlist returned: %T %v", result, result))
+	}
+}
+
+func (al *LocalAllowList) Allow(ip net.IP) bool {
+	if al == nil {
+		return true
+	}
+	return al.AllowList.Allow(ip)
+}
+
+func (al *LocalAllowList) AllowName(name string) bool {
+	if al == nil || len(al.nameRules) == 0 {
+		return true
+	}
+
+	for _, rule := range al.nameRules {
+		if rule.Name.MatchString(name) {
+			return rule.Allow
+		}
+	}
+
+	// If no rules match, return the default, which is the inverse of the rules
+	return !al.nameRules[0].Allow
+}
+
+func (al *RemoteAllowList) AllowUnknownVpnIp(ip net.IP) bool {
+	if al == nil {
+		return true
+	}
+	return al.AllowList.Allow(ip)
+}
+
+func (al *RemoteAllowList) Allow(vpnIp iputil.VpnIp, ip net.IP) bool {
+	if !al.getInsideAllowList(vpnIp).Allow(ip) {
+		return false
+	}
+	return al.AllowList.Allow(ip)
+}
+
+func (al *RemoteAllowList) AllowIpV4(vpnIp iputil.VpnIp, ip iputil.VpnIp) bool {
+	if al == nil {
+		return true
+	}
+	if !al.getInsideAllowList(vpnIp).AllowIpV4(ip) {
+		return false
+	}
+	return al.AllowList.AllowIpV4(ip)
+}
+
+func (al *RemoteAllowList) AllowIpV6(vpnIp iputil.VpnIp, hi, lo uint64) bool {
+	if al == nil {
+		return true
+	}
+	if !al.getInsideAllowList(vpnIp).AllowIpV6(hi, lo) {
+		return false
+	}
+	return al.AllowList.AllowIpV6(hi, lo)
+}
+
+func (al *RemoteAllowList) getInsideAllowList(vpnIp iputil.VpnIp) *AllowList {
+	if al.insideAllowLists != nil {
+		inside := al.insideAllowLists.MostSpecificContainsIpV4(vpnIp)
+		if inside != nil {
+			return inside.(*AllowList)
+		}
+	}
+	return nil
+}

allow_list_test.go

@@ -0,0 +1,145 @@
+package nebula
+
+import (
+	"net"
+	"regexp"
+	"testing"
+
+	"github.com/slackhq/nebula/cidr"
+	"github.com/slackhq/nebula/config"
+	"github.com/slackhq/nebula/test"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewAllowListFromConfig(t *testing.T) {
+	l := test.NewLogger()
+	c := config.NewC(l)
+	c.Settings["allowlist"] = map[interface{}]interface{}{
+		"192.168.0.0": true,
+	}
+	r, err := newAllowListFromConfig(c, "allowlist", nil)
+	assert.EqualError(t, err, "config `allowlist` has invalid CIDR: 192.168.0.0")
+	assert.Nil(t, r)
+
+	c.Settings["allowlist"] = map[interface{}]interface{}{
+		"192.168.0.0/16": "abc",
+	}
+	r, err = newAllowListFromConfig(c, "allowlist", nil)
+	assert.EqualError(t, err, "config `allowlist` has invalid value (type string): abc")
+
+	c.Settings["allowlist"] = map[interface{}]interface{}{
+		"192.168.0.0/16": true,
+		"10.0.0.0/8":     false,
+	}
+	r, err = newAllowListFromConfig(c, "allowlist", nil)
+	assert.EqualError(t, err, "config `allowlist` contains both true and false rules, but no default set for 0.0.0.0/0")
+
+	c.Settings["allowlist"] = map[interface{}]interface{}{
+		"0.0.0.0/0":      true,
+		"10.0.0.0/8":     false,
+		"10.42.42.0/24":  true,
+		"fd00::/8":       true,
+		"fd00:fd00::/16": false,
+	}
+	r, err = newAllowListFromConfig(c, "allowlist", nil)
+	assert.EqualError(t, err, "config `allowlist` contains both true and false rules, but no default set for ::/0")
+
+	c.Settings["allowlist"] = map[interface{}]interface{}{
+		"0.0.0.0/0":     true,
+		"10.0.0.0/8":    false,
+		"10.42.42.0/24": true,
+	}
+	r, err = newAllowListFromConfig(c, "allowlist", nil)
+	if assert.NoError(t, err) {
+		assert.NotNil(t, r)
+	}
+
+	c.Settings["allowlist"] = map[interface{}]interface{}{
+		"0.0.0.0/0":      true,
+		"10.0.0.0/8":     false,
+		"10.42.42.0/24":  true,
+		"::/0":           false,
+		"fd00::/8":       true,
+		"fd00:fd00::/16": false,
+	}
+	r, err = newAllowListFromConfig(c, "allowlist", nil)
+	if assert.NoError(t, err) {
+		assert.NotNil(t, r)
+	}
+
+	// Test interface names
+
+	c.Settings["allowlist"] = map[interface{}]interface{}{
+		"interfaces": map[interface{}]interface{}{
+			`docker.*`: "foo",
+		},
+	}
+	lr, err := NewLocalAllowListFromConfig(c, "allowlist")
+	assert.EqualError(t, err, "config `allowlist.interfaces` has invalid value (type string): foo")
+
+	c.Settings["allowlist"] = map[interface{}]interface{}{
+		"interfaces": map[interface{}]interface{}{
+			`docker.*`: false,
+			`eth.*`:    true,
+		},
+	}
+	lr, err = NewLocalAllowListFromConfig(c, "allowlist")
+	assert.EqualError(t, err, "config `allowlist.interfaces` values must all be the same true/false value")
+
+	c.Settings["allowlist"] = map[interface{}]interface{}{
+		"interfaces": map[interface{}]interface{}{
+			`docker.*`: false,
+		},
+	}
+	lr, err = NewLocalAllowListFromConfig(c, "allowlist")
+	if assert.NoError(t, err) {
+		assert.NotNil(t, lr)
+	}
+}
+
+func TestAllowList_Allow(t *testing.T) {
+	assert.Equal(t, true, ((*AllowList)(nil)).Allow(net.ParseIP("1.1.1.1")))
+
+	tree := cidr.NewTree6()
+	tree.AddCIDR(cidr.Parse("0.0.0.0/0"), true)
+	tree.AddCIDR(cidr.Parse("10.0.0.0/8"), false)
+	tree.AddCIDR(cidr.Parse("10.42.42.42/32"), true)
+	tree.AddCIDR(cidr.Parse("10.42.0.0/16"), true)
+	tree.AddCIDR(cidr.Parse("10.42.42.0/24"), true)
+	tree.AddCIDR(cidr.Parse("10.42.42.0/24"), false)
+	tree.AddCIDR(cidr.Parse("::1/128"), true)
+	tree.AddCIDR(cidr.Parse("::2/128"), false)
+	al := &AllowList{cidrTree: tree}
+
+	assert.Equal(t, true, al.Allow(net.ParseIP("1.1.1.1")))
+	assert.Equal(t, false, al.Allow(net.ParseIP("10.0.0.4")))
+	assert.Equal(t, true, al.Allow(net.ParseIP("10.42.42.42")))
+	assert.Equal(t, false, al.Allow(net.ParseIP("10.42.42.41")))
+	assert.Equal(t, true, al.Allow(net.ParseIP("10.42.0.1")))
+	assert.Equal(t, true, al.Allow(net.ParseIP("::1")))
+	assert.Equal(t, false, al.Allow(net.ParseIP("::2")))
+}
+
+func TestLocalAllowList_AllowName(t *testing.T) {
+	assert.Equal(t, true, ((*LocalAllowList)(nil)).AllowName("docker0"))
+
+	rules := []AllowListNameRule{
+		{Name: regexp.MustCompile("^docker.*$"), Allow: false},
+		{Name: regexp.MustCompile("^tun.*$"), Allow: false},
+	}
+	al := &LocalAllowList{nameRules: rules}
+
+	assert.Equal(t, false, al.AllowName("docker0"))
+	assert.Equal(t, false, al.AllowName("tun0"))
+	assert.Equal(t, true, al.AllowName("eth0"))
+
+	rules = []AllowListNameRule{
+		{Name: regexp.MustCompile("^eth.*$"), Allow: true},
+		{Name: regexp.MustCompile("^ens.*$"), Allow: true},
+	}
+	al = &LocalAllowList{nameRules: rules}
+
+	assert.Equal(t, false, al.AllowName("docker0"))
+	assert.Equal(t, true, al.AllowName("eth0"))
+	assert.Equal(t, true, al.AllowName("ens5"))
+}

bits.go

@@ -26,7 +26,7 @@ func NewBits(bits uint64) *Bits {
 	}
 }
 
-func (b *Bits) Check(i uint64) bool {
+func (b *Bits) Check(l logrus.FieldLogger, i uint64) bool {
 	// If i is the next number, return true.
 	if i > b.current || (i == 0 && b.firstSeen == false && b.current < b.length) {
 		return true
@@ -47,7 +47,7 @@ func (b *Bits) Check(i uint64) bool {
 	return false
 }
 
-func (b *Bits) Update(i uint64) bool {
+func (b *Bits) Update(l *logrus.Logger, i uint64) bool {
 	// If i is the next number, return true and update current.
 	if i == b.current+1 {
 		// Report missed packets, we can only understand what was missed after the first window has been gone through

bits_test.go

@@ -3,10 +3,12 @@ package nebula
 import (
 	"testing"
 
+	"github.com/slackhq/nebula/test"
 	"github.com/stretchr/testify/assert"
 )
 
 func TestBits(t *testing.T) {
+	l := test.NewLogger()
 	b := NewBits(10)
 
 	// make sure it is the right size
@@ -14,46 +16,46 @@ func TestBits(t *testing.T) {
 
 	// This is initialized to zero - receive one. This should work.
 
-	assert.True(t, b.Check(1))
+	assert.True(t, b.Check(l, 1))
-	u := b.Update(1)
+	u := b.Update(l, 1)
 	assert.True(t, u)
 	assert.EqualValues(t, 1, b.current)
 	g := []bool{false, true, false, false, false, false, false, false, false, false}
 	assert.Equal(t, g, b.bits)
 
 	// Receive two
-	assert.True(t, b.Check(2))
+	assert.True(t, b.Check(l, 2))
-	u = b.Update(2)
+	u = b.Update(l, 2)
 	assert.True(t, u)
 	assert.EqualValues(t, 2, b.current)
 	g = []bool{false, true, true, false, false, false, false, false, false, false}
 	assert.Equal(t, g, b.bits)
 
 	// Receive two again - it will fail
-	assert.False(t, b.Check(2))
+	assert.False(t, b.Check(l, 2))
-	u = b.Update(2)
+	u = b.Update(l, 2)
 	assert.False(t, u)
 	assert.EqualValues(t, 2, b.current)
 
 	// Jump ahead to 15, which should clear everything and set the 6th element
-	assert.True(t, b.Check(15))
+	assert.True(t, b.Check(l, 15))
-	u = b.Update(15)
+	u = b.Update(l, 15)
 	assert.True(t, u)
 	assert.EqualValues(t, 15, b.current)
 	g = []bool{false, false, false, false, false, true, false, false, false, false}
 	assert.Equal(t, g, b.bits)
 
 	// Mark 14, which is allowed because it is in the window
-	assert.True(t, b.Check(14))
+	assert.True(t, b.Check(l, 14))
-	u = b.Update(14)
+	u = b.Update(l, 14)
 	assert.True(t, u)
 	assert.EqualValues(t, 15, b.current)
 	g = []bool{false, false, false, false, true, true, false, false, false, false}
 	assert.Equal(t, g, b.bits)
 
 	// Mark 5, which is not allowed because it is not in the window
-	assert.False(t, b.Check(5))
+	assert.False(t, b.Check(l, 5))
-	u = b.Update(5)
+	u = b.Update(l, 5)
 	assert.False(t, u)
 	assert.EqualValues(t, 15, b.current)
 	g = []bool{false, false, false, false, true, true, false, false, false, false}
@@ -61,63 +63,65 @@ func TestBits(t *testing.T) {
 
 	// make sure we handle wrapping around once to the current position
 	b = NewBits(10)
-	assert.True(t, b.Update(1))
+	assert.True(t, b.Update(l, 1))
-	assert.True(t, b.Update(11))
+	assert.True(t, b.Update(l, 11))
 	assert.Equal(t, []bool{false, true, false, false, false, false, false, false, false, false}, b.bits)
 
 	// Walk through a few windows in order
 	b = NewBits(10)
 	for i := uint64(0); i <= 100; i++ {
-		assert.True(t, b.Check(i), "Error while checking %v", i)
+		assert.True(t, b.Check(l, i), "Error while checking %v", i)
-		assert.True(t, b.Update(i), "Error while updating %v", i)
+		assert.True(t, b.Update(l, i), "Error while updating %v", i)
 	}
 }
 
 func TestBitsDupeCounter(t *testing.T) {
+	l := test.NewLogger()
 	b := NewBits(10)
 	b.lostCounter.Clear()
 	b.dupeCounter.Clear()
 	b.outOfWindowCounter.Clear()
 
-	assert.True(t, b.Update(1))
+	assert.True(t, b.Update(l, 1))
 	assert.Equal(t, int64(0), b.dupeCounter.Count())
 
-	assert.False(t, b.Update(1))
+	assert.False(t, b.Update(l, 1))
 	assert.Equal(t, int64(1), b.dupeCounter.Count())
 
-	assert.True(t, b.Update(2))
+	assert.True(t, b.Update(l, 2))
 	assert.Equal(t, int64(1), b.dupeCounter.Count())
 
-	assert.True(t, b.Update(3))
+	assert.True(t, b.Update(l, 3))
 	assert.Equal(t, int64(1), b.dupeCounter.Count())
 
-	assert.False(t, b.Update(1))
+	assert.False(t, b.Update(l, 1))
 	assert.Equal(t, int64(0), b.lostCounter.Count())
 	assert.Equal(t, int64(2), b.dupeCounter.Count())
 	assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
 }
 
 func TestBitsOutOfWindowCounter(t *testing.T) {
+	l := test.NewLogger()
 	b := NewBits(10)
 	b.lostCounter.Clear()
 	b.dupeCounter.Clear()
 	b.outOfWindowCounter.Clear()
 
-	assert.True(t, b.Update(20))
+	assert.True(t, b.Update(l, 20))
 	assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
 
-	assert.True(t, b.Update(21))
+	assert.True(t, b.Update(l, 21))
-	assert.True(t, b.Update(22))
+	assert.True(t, b.Update(l, 22))
-	assert.True(t, b.Update(23))
+	assert.True(t, b.Update(l, 23))
-	assert.True(t, b.Update(24))
+	assert.True(t, b.Update(l, 24))
-	assert.True(t, b.Update(25))
+	assert.True(t, b.Update(l, 25))
-	assert.True(t, b.Update(26))
+	assert.True(t, b.Update(l, 26))
-	assert.True(t, b.Update(27))
+	assert.True(t, b.Update(l, 27))
-	assert.True(t, b.Update(28))
+	assert.True(t, b.Update(l, 28))
-	assert.True(t, b.Update(29))
+	assert.True(t, b.Update(l, 29))
 	assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
 
-	assert.False(t, b.Update(0))
+	assert.False(t, b.Update(l, 0))
 	assert.Equal(t, int64(1), b.outOfWindowCounter.Count())
 
 	//tODO: make sure lostcounter doesn't increase in orderly increment
@@ -127,23 +131,24 @@ func TestBitsOutOfWindowCounter(t *testing.T) {
 }
 
 func TestBitsLostCounter(t *testing.T) {
+	l := test.NewLogger()
 	b := NewBits(10)
 	b.lostCounter.Clear()
 	b.dupeCounter.Clear()
 	b.outOfWindowCounter.Clear()
 
 	//assert.True(t, b.Update(0))
-	assert.True(t, b.Update(0))
+	assert.True(t, b.Update(l, 0))
-	assert.True(t, b.Update(20))
+	assert.True(t, b.Update(l, 20))
-	assert.True(t, b.Update(21))
+	assert.True(t, b.Update(l, 21))
-	assert.True(t, b.Update(22))
+	assert.True(t, b.Update(l, 22))
-	assert.True(t, b.Update(23))
+	assert.True(t, b.Update(l, 23))
-	assert.True(t, b.Update(24))
+	assert.True(t, b.Update(l, 24))
-	assert.True(t, b.Update(25))
+	assert.True(t, b.Update(l, 25))
-	assert.True(t, b.Update(26))
+	assert.True(t, b.Update(l, 26))
-	assert.True(t, b.Update(27))
+	assert.True(t, b.Update(l, 27))
-	assert.True(t, b.Update(28))
+	assert.True(t, b.Update(l, 28))
-	assert.True(t, b.Update(29))
+	assert.True(t, b.Update(l, 29))
 	assert.Equal(t, int64(20), b.lostCounter.Count())
 	assert.Equal(t, int64(0), b.dupeCounter.Count())
 	assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
@@ -153,56 +158,56 @@ func TestBitsLostCounter(t *testing.T) {
 	b.dupeCounter.Clear()
 	b.outOfWindowCounter.Clear()
 
-	assert.True(t, b.Update(0))
+	assert.True(t, b.Update(l, 0))
 	assert.Equal(t, int64(0), b.lostCounter.Count())
-	assert.True(t, b.Update(9))
+	assert.True(t, b.Update(l, 9))
 	assert.Equal(t, int64(0), b.lostCounter.Count())
 	// 10 will set 0 index, 0 was already set, no lost packets
-	assert.True(t, b.Update(10))
+	assert.True(t, b.Update(l, 10))
 	assert.Equal(t, int64(0), b.lostCounter.Count())
 	// 11 will set 1 index, 1 was missed, we should see 1 packet lost
-	assert.True(t, b.Update(11))
+	assert.True(t, b.Update(l, 11))
 	assert.Equal(t, int64(1), b.lostCounter.Count())
 	// Now let's fill in the window, should end up with 8 lost packets
-	assert.True(t, b.Update(12))
+	assert.True(t, b.Update(l, 12))
-	assert.True(t, b.Update(13))
+	assert.True(t, b.Update(l, 13))
-	assert.True(t, b.Update(14))
+	assert.True(t, b.Update(l, 14))
-	assert.True(t, b.Update(15))
+	assert.True(t, b.Update(l, 15))
-	assert.True(t, b.Update(16))
+	assert.True(t, b.Update(l, 16))
-	assert.True(t, b.Update(17))
+	assert.True(t, b.Update(l, 17))
-	assert.True(t, b.Update(18))
+	assert.True(t, b.Update(l, 18))
-	assert.True(t, b.Update(19))
+	assert.True(t, b.Update(l, 19))
 	assert.Equal(t, int64(8), b.lostCounter.Count())
 
 	// Jump ahead by a window size
-	assert.True(t, b.Update(29))
+	assert.True(t, b.Update(l, 29))
 	assert.Equal(t, int64(8), b.lostCounter.Count())
 	// Now lets walk ahead normally through the window, the missed packets should fill in
-	assert.True(t, b.Update(30))
+	assert.True(t, b.Update(l, 30))
-	assert.True(t, b.Update(31))
+	assert.True(t, b.Update(l, 31))
-	assert.True(t, b.Update(32))
+	assert.True(t, b.Update(l, 32))
-	assert.True(t, b.Update(33))
+	assert.True(t, b.Update(l, 33))
-	assert.True(t, b.Update(34))
+	assert.True(t, b.Update(l, 34))
-	assert.True(t, b.Update(35))
+	assert.True(t, b.Update(l, 35))
-	assert.True(t, b.Update(36))
+	assert.True(t, b.Update(l, 36))
-	assert.True(t, b.Update(37))
+	assert.True(t, b.Update(l, 37))
-	assert.True(t, b.Update(38))
+	assert.True(t, b.Update(l, 38))
 	// 39 packets tracked, 22 seen, 17 lost
 	assert.Equal(t, int64(17), b.lostCounter.Count())
 
 	// Jump ahead by 2 windows, should have recording 1 full window missing
-	assert.True(t, b.Update(58))
+	assert.True(t, b.Update(l, 58))
 	assert.Equal(t, int64(27), b.lostCounter.Count())
 	// Now lets walk ahead normally through the window, the missed packets should fill in from this window
-	assert.True(t, b.Update(59))
+	assert.True(t, b.Update(l, 59))
-	assert.True(t, b.Update(60))
+	assert.True(t, b.Update(l, 60))
-	assert.True(t, b.Update(61))
+	assert.True(t, b.Update(l, 61))
-	assert.True(t, b.Update(62))
+	assert.True(t, b.Update(l, 62))
-	assert.True(t, b.Update(63))
+	assert.True(t, b.Update(l, 63))
-	assert.True(t, b.Update(64))
+	assert.True(t, b.Update(l, 64))
-	assert.True(t, b.Update(65))
+	assert.True(t, b.Update(l, 65))
-	assert.True(t, b.Update(66))
+	assert.True(t, b.Update(l, 66))
-	assert.True(t, b.Update(67))
+	assert.True(t, b.Update(l, 67))
 	// 68 packets tracked, 32 seen, 36 missed
 	assert.Equal(t, int64(36), b.lostCounter.Count())
 	assert.Equal(t, int64(0), b.dupeCounter.Count())
@@ -212,10 +217,10 @@ func TestBitsLostCounter(t *testing.T) {
 func BenchmarkBits(b *testing.B) {
 	z := NewBits(10)
 	for n := 0; n < b.N; n++ {
-		for i, _ := range z.bits {
+		for i := range z.bits {
 			z.bits[i] = true
 		}
-		for i, _ := range z.bits {
+		for i := range z.bits {
 			z.bits[i] = false
 		}
 

cert.go

@@ -7,11 +7,11 @@ import (
 	"strings"
 	"time"
 
+	"github.com/sirupsen/logrus"
 	"github.com/slackhq/nebula/cert"
+	"github.com/slackhq/nebula/config"
 )
 
-var trustedCAs *cert.NebulaCAPool
-
 type CertState struct {
 	certificate         *cert.NebulaCertificate
 	rawCertificate      []byte
@@ -46,16 +46,11 @@ func NewCertState(certificate *cert.NebulaCertificate, privateKey []byte) (*Cert
 	return cs, nil
 }
 
-func NewCertStateFromConfig(c *Config) (*CertState, error) {
+func NewCertStateFromConfig(c *config.C) (*CertState, error) {
 	var pemPrivateKey []byte
 	var err error
 
 	privPathOrPEM := c.GetString("pki.key", "")
-	if privPathOrPEM == "" {
-		// Support backwards compat with the old x509
-		//TODO: remove after this is rolled out everywhere - NB 2018/02/23
-		privPathOrPEM = c.GetString("x509.key", "")
-	}
 
 	if privPathOrPEM == "" {
 		return nil, errors.New("no pki.key path or PEM data provided")
@@ -79,11 +74,6 @@ func NewCertStateFromConfig(c *Config) (*CertState, error) {
 	var rawCert []byte
 
 	pubPathOrPEM := c.GetString("pki.cert", "")
-	if pubPathOrPEM == "" {
-		// Support backwards compat with the old x509
-		//TODO: remove after this is rolled out everywhere - NB 2018/02/23
-		pubPathOrPEM = c.GetString("x509.cert", "")
-	}
 
 	if pubPathOrPEM == "" {
 		return nil, errors.New("no pki.cert path or PEM data provided")
@@ -119,24 +109,18 @@ func NewCertStateFromConfig(c *Config) (*CertState, error) {
 	return NewCertState(nebulaCert, rawKey)
 }
 
-func loadCAFromConfig(c *Config) (*cert.NebulaCAPool, error) {
+func loadCAFromConfig(l *logrus.Logger, c *config.C) (*cert.NebulaCAPool, error) {
 	var rawCA []byte
 	var err error
 
 	caPathOrPEM := c.GetString("pki.ca", "")
-	if caPathOrPEM == "" {
-		// Support backwards compat with the old x509
-		//TODO: remove after this is rolled out everywhere - NB 2018/02/23
-		caPathOrPEM = c.GetString("x509.ca", "")
-	}
-
 	if caPathOrPEM == "" {
 		return nil, errors.New("no pki.ca path or PEM data provided")
 	}
 
 	if strings.Contains(caPathOrPEM, "-----BEGIN") {
 		rawCA = []byte(caPathOrPEM)
-		caPathOrPEM = "<inline>"
+
 	} else {
 		rawCA, err = ioutil.ReadFile(caPathOrPEM)
 		if err != nil {
@@ -145,14 +129,34 @@ func loadCAFromConfig(c *Config) (*cert.NebulaCAPool, error) {
 	}
 
 	CAs, err := cert.NewCAPoolFromBytes(rawCA)
-	if err != nil {
+	if errors.Is(err, cert.ErrExpired) {
+		var expired int
+		for _, cert := range CAs.CAs {
+			if cert.Expired(time.Now()) {
+				expired++
+				l.WithField("cert", cert).Warn("expired certificate present in CA pool")
+			}
+		}
+
+		if expired >= len(CAs.CAs) {
+			return nil, errors.New("no valid CA certificates present")
+		}
+
+	} else if err != nil {
 		return nil, fmt.Errorf("error while adding CA certificate to CA trust store: %s", err)
 	}
 
-	// pki.blacklist entered the scene at about the same time we aliased x509 to pki, not supporting backwards compat
+	for _, fp := range c.GetStringSlice("pki.blocklist", []string{}) {
+		l.WithField("fingerprint", fp).Info("Blocklisting cert")
+		CAs.BlocklistFingerprint(fp)
+	}
+
+	// Support deprecated config for at least one minor release to allow for migrations
+	//TODO: remove in 2022 or later
 	for _, fp := range c.GetStringSlice("pki.blacklist", []string{}) {
-		l.WithField("fingerprint", fp).Infof("Blacklisting cert")
+		l.WithField("fingerprint", fp).Info("Blocklisting cert")
-		CAs.BlacklistFingerprint(fp)
+		l.Warn("pki.blacklist is deprecated and will not be supported in a future release. Please migrate your config to use pki.blocklist")
+		CAs.BlocklistFingerprint(fp)
 	}
 
 	return CAs, nil

cert/Makefile

@@ -2,8 +2,8 @@ GO111MODULE = on
 export GO111MODULE
 
 cert.pb.go: cert.proto .FORCE
-	go build github.com/golang/protobuf/protoc-gen-go
+	go build google.golang.org/protobuf/cmd/protoc-gen-go
-	PATH="$(PWD):$(PATH)" protoc --go_out=. $<
+	PATH="$(CURDIR):$(PATH)" protoc --go_out=. --go_opt=paths=source_relative $<
 	rm protoc-gen-go
 
 .FORCE:

cert/ca.go

@@ -1,6 +1,7 @@
 package cert
 
 import (
+	"errors"
 	"fmt"
 	"strings"
 	"time"
@@ -8,32 +9,45 @@ import (
 
 type NebulaCAPool struct {
 	CAs           map[string]*NebulaCertificate
-	certBlacklist map[string]struct{}
+	certBlocklist map[string]struct{}
 }
 
 // NewCAPool creates a CAPool
 func NewCAPool() *NebulaCAPool {
 	ca := NebulaCAPool{
 		CAs:           make(map[string]*NebulaCertificate),
-		certBlacklist: make(map[string]struct{}),
+		certBlocklist: make(map[string]struct{}),
 	}
 
 	return &ca
 }
 
+// NewCAPoolFromBytes will create a new CA pool from the provided
+// input bytes, which must be a PEM-encoded set of nebula certificates.
+// If the pool contains any expired certificates, an ErrExpired will be
+// returned along with the pool. The caller must handle any such errors.
 func NewCAPoolFromBytes(caPEMs []byte) (*NebulaCAPool, error) {
 	pool := NewCAPool()
 	var err error
+	var expired bool
 	for {
 		caPEMs, err = pool.AddCACertificate(caPEMs)
+		if errors.Is(err, ErrExpired) {
+			expired = true
+			err = nil
+		}
 		if err != nil {
 			return nil, err
 		}
-		if caPEMs == nil || len(caPEMs) == 0 || strings.TrimSpace(string(caPEMs)) == "" {
+		if len(caPEMs) == 0 || strings.TrimSpace(string(caPEMs)) == "" {
 			break
 		}
 	}
 
+	if expired {
+		return pool, ErrExpired
+	}
+
 	return pool, nil
 }
 
@@ -47,15 +61,11 @@ func (ncp *NebulaCAPool) AddCACertificate(pemBytes []byte) ([]byte, error) {
 	}
 
 	if !c.Details.IsCA {
-		return pemBytes, fmt.Errorf("provided certificate was not a CA; %s", c.Details.Name)
+		return pemBytes, fmt.Errorf("%s: %w", c.Details.Name, ErrNotCA)
 	}
 
 	if !c.CheckSignature(c.Details.PublicKey) {
-		return pemBytes, fmt.Errorf("provided certificate was not self signed; %s", c.Details.Name)
+		return pemBytes, fmt.Errorf("%s: %w", c.Details.Name, ErrNotSelfSigned)
-	}
-
-	if c.Expired(time.Now()) {
-		return pemBytes, fmt.Errorf("provided CA certificate is expired; %s", c.Details.Name)
 	}
 
 	sum, err := c.Sha256Sum()
@@ -64,27 +74,31 @@ func (ncp *NebulaCAPool) AddCACertificate(pemBytes []byte) ([]byte, error) {
 	}
 
 	ncp.CAs[sum] = c
+	if c.Expired(time.Now()) {
+		return pemBytes, fmt.Errorf("%s: %w", c.Details.Name, ErrExpired)
+	}
+
 	return pemBytes, nil
 }
 
-// BlacklistFingerprint adds a cert fingerprint to the blacklist
+// BlocklistFingerprint adds a cert fingerprint to the blocklist
-func (ncp *NebulaCAPool) BlacklistFingerprint(f string) {
+func (ncp *NebulaCAPool) BlocklistFingerprint(f string) {
-	ncp.certBlacklist[f] = struct{}{}
+	ncp.certBlocklist[f] = struct{}{}
 }
 
-// ResetCertBlacklist removes all previously blacklisted cert fingerprints
+// ResetCertBlocklist removes all previously blocklisted cert fingerprints
-func (ncp *NebulaCAPool) ResetCertBlacklist() {
+func (ncp *NebulaCAPool) ResetCertBlocklist() {
-	ncp.certBlacklist = make(map[string]struct{})
+	ncp.certBlocklist = make(map[string]struct{})
 }
 
-// IsBlacklisted returns true if the fingerprint fails to generate or has been explicitly blacklisted
+// IsBlocklisted returns true if the fingerprint fails to generate or has been explicitly blocklisted
-func (ncp *NebulaCAPool) IsBlacklisted(c *NebulaCertificate) bool {
+func (ncp *NebulaCAPool) IsBlocklisted(c *NebulaCertificate) bool {
 	h, err := c.Sha256Sum()
 	if err != nil {
 		return true
 	}
 
-	if _, ok := ncp.certBlacklist[h]; ok {
+	if _, ok := ncp.certBlocklist[h]; ok {
 		return true
 	}
 

cert/cert.go

@@ -1,21 +1,21 @@
 package cert
 
 import (
+	"bytes"
 	"crypto"
 	"crypto/rand"
 	"crypto/sha256"
 	"encoding/binary"
 	"encoding/hex"
+	"encoding/json"
 	"encoding/pem"
 	"fmt"
 	"net"
 	"time"
 
-	"bytes"
-	"encoding/json"
-	"github.com/golang/protobuf/proto"
 	"golang.org/x/crypto/curve25519"
 	"golang.org/x/crypto/ed25519"
+	"google.golang.org/protobuf/proto"
 )
 
 const publicKeyLen = 32
@@ -61,6 +61,10 @@ func UnmarshalNebulaCertificate(b []byte) (*NebulaCertificate, error) {
 		return nil, err
 	}
 
+	if rc.Details == nil {
+		return nil, fmt.Errorf("encoded Details was nil")
+	}
+
 	if len(rc.Details.Ips)%2 != 0 {
 		return nil, fmt.Errorf("encoded IPs should be in pairs, an odd number was found")
 	}
@@ -123,6 +127,9 @@ func UnmarshalNebulaCertificateFromPEM(b []byte) (*NebulaCertificate, []byte, er
 	if p == nil {
 		return nil, r, fmt.Errorf("input did not contain a valid PEM encoded block")
 	}
+	if p.Type != CertBanner {
+		return nil, r, fmt.Errorf("bytes did not contain a proper nebula certificate banner")
+	}
 	nc, err := UnmarshalNebulaCertificate(p.Bytes)
 	return nc, r, err
 }
@@ -244,10 +251,10 @@ func (nc *NebulaCertificate) Expired(t time.Time) bool {
 	return nc.Details.NotBefore.After(t) || nc.Details.NotAfter.Before(t)
 }
 
-// Verify will ensure a certificate is good in all respects (expiry, group membership, signature, cert blacklist, etc)
+// Verify will ensure a certificate is good in all respects (expiry, group membership, signature, cert blocklist, etc)
 func (nc *NebulaCertificate) Verify(t time.Time, ncp *NebulaCAPool) (bool, error) {
-	if ncp.IsBlacklisted(nc) {
+	if ncp.IsBlocklisted(nc) {
-		return false, fmt.Errorf("certificate has been blacklisted")
+		return false, fmt.Errorf("certificate has been blocked")
 	}
 
 	signer, err := ncp.GetCAForCert(nc)
@@ -318,12 +325,26 @@ func (nc *NebulaCertificate) CheckRootConstrains(signer *NebulaCertificate) erro
 
 // VerifyPrivateKey checks that the public key in the Nebula certificate and a supplied private key match
 func (nc *NebulaCertificate) VerifyPrivateKey(key []byte) error {
-	var dst, key32 [32]byte
+	if nc.Details.IsCA {
-	copy(key32[:], key)
+		// the call to PublicKey below will panic slice bounds out of range otherwise
-	curve25519.ScalarBaseMult(&dst, &key32)
+		if len(key) != ed25519.PrivateKeySize {
-	if !bytes.Equal(dst[:], nc.Details.PublicKey) {
+			return fmt.Errorf("key was not 64 bytes, is invalid ed25519 private key")
+		}
+
+		if !ed25519.PublicKey(nc.Details.PublicKey).Equal(ed25519.PrivateKey(key).Public()) {
 			return fmt.Errorf("public key in cert and private key supplied don't match")
 		}
+		return nil
+	}
+
+	pub, err := curve25519.X25519(key, curve25519.Basepoint)
+	if err != nil {
+		return err
+	}
+	if !bytes.Equal(pub, nc.Details.PublicKey) {
+		return fmt.Errorf("public key in cert and private key supplied don't match")
+	}
+
 	return nil
 }
 
@@ -468,6 +489,63 @@ func (nc *NebulaCertificate) MarshalJSON() ([]byte, error) {
 	return json.Marshal(jc)
 }
 
+//func (nc *NebulaCertificate) Copy() *NebulaCertificate {
+//	r, err := nc.Marshal()
+//	if err != nil {
+//		//TODO
+//		return nil
+//	}
+//
+//	c, err := UnmarshalNebulaCertificate(r)
+//	return c
+//}
+
+func (nc *NebulaCertificate) Copy() *NebulaCertificate {
+	c := &NebulaCertificate{
+		Details: NebulaCertificateDetails{
+			Name:           nc.Details.Name,
+			Groups:         make([]string, len(nc.Details.Groups)),
+			Ips:            make([]*net.IPNet, len(nc.Details.Ips)),
+			Subnets:        make([]*net.IPNet, len(nc.Details.Subnets)),
+			NotBefore:      nc.Details.NotBefore,
+			NotAfter:       nc.Details.NotAfter,
+			PublicKey:      make([]byte, len(nc.Details.PublicKey)),
+			IsCA:           nc.Details.IsCA,
+			Issuer:         nc.Details.Issuer,
+			InvertedGroups: make(map[string]struct{}, len(nc.Details.InvertedGroups)),
+		},
+		Signature: make([]byte, len(nc.Signature)),
+	}
+
+	copy(c.Signature, nc.Signature)
+	copy(c.Details.Groups, nc.Details.Groups)
+	copy(c.Details.PublicKey, nc.Details.PublicKey)
+
+	for i, p := range nc.Details.Ips {
+		c.Details.Ips[i] = &net.IPNet{
+			IP:   make(net.IP, len(p.IP)),
+			Mask: make(net.IPMask, len(p.Mask)),
+		}
+		copy(c.Details.Ips[i].IP, p.IP)
+		copy(c.Details.Ips[i].Mask, p.Mask)
+	}
+
+	for i, p := range nc.Details.Subnets {
+		c.Details.Subnets[i] = &net.IPNet{
+			IP:   make(net.IP, len(p.IP)),
+			Mask: make(net.IPMask, len(p.Mask)),
+		}
+		copy(c.Details.Subnets[i].IP, p.IP)
+		copy(c.Details.Subnets[i].Mask, p.Mask)
+	}
+
+	for g := range nc.Details.InvertedGroups {
+		c.Details.InvertedGroups[g] = struct{}{}
+	}
+
+	return c
+}
+
 func netMatch(certIp *net.IPNet, rootIps []*net.IPNet) bool {
 	for _, net := range rootIps {
 		if net.Contains(certIp.IP) && maskContains(net.Mask, certIp.Mask) {

cert/cert.pb.go

@@ -1,202 +1,298 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.28.0
+// 	protoc        v3.20.0
 // source: cert.proto
 
 package cert
 
 import (
-	fmt "fmt"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
-	proto "github.com/golang/protobuf/proto"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
-	math "math"
+	reflect "reflect"
+	sync "sync"
 )
 
-// Reference imports to suppress errors if they are not otherwise used.
+const (
-var _ = proto.Marshal
+	// Verify that this generated code is sufficiently up-to-date.
-var _ = fmt.Errorf
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
-var _ = math.Inf
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
-
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
-// This is a compile-time assertion to ensure that this generated file
+)
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
 
 type RawNebulaCertificate struct {
-	Details              *RawNebulaCertificateDetails `protobuf:"bytes,1,opt,name=Details,json=details,proto3" json:"Details,omitempty"`
+	state         protoimpl.MessageState
-	Signature            []byte                       `protobuf:"bytes,2,opt,name=Signature,json=signature,proto3" json:"Signature,omitempty"`
+	sizeCache     protoimpl.SizeCache
-	XXX_NoUnkeyedLiteral struct{}                     `json:"-"`
+	unknownFields protoimpl.UnknownFields
-	XXX_unrecognized     []byte                       `json:"-"`
+
-	XXX_sizecache        int32                        `json:"-"`
+	Details   *RawNebulaCertificateDetails `protobuf:"bytes,1,opt,name=Details,proto3" json:"Details,omitempty"`
+	Signature []byte                       `protobuf:"bytes,2,opt,name=Signature,proto3" json:"Signature,omitempty"`
+}
+
+func (x *RawNebulaCertificate) Reset() {
+	*x = RawNebulaCertificate{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cert_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *RawNebulaCertificate) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
 
-func (m *RawNebulaCertificate) Reset()         { *m = RawNebulaCertificate{} }
-func (m *RawNebulaCertificate) String() string { return proto.CompactTextString(m) }
 func (*RawNebulaCertificate) ProtoMessage() {}
+
+func (x *RawNebulaCertificate) ProtoReflect() protoreflect.Message {
+	mi := &file_cert_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RawNebulaCertificate.ProtoReflect.Descriptor instead.
 func (*RawNebulaCertificate) Descriptor() ([]byte, []int) {
-	return fileDescriptor_a142e29cbef9b1cf, []int{0}
+	return file_cert_proto_rawDescGZIP(), []int{0}
 }
 
-func (m *RawNebulaCertificate) XXX_Unmarshal(b []byte) error {
+func (x *RawNebulaCertificate) GetDetails() *RawNebulaCertificateDetails {
-	return xxx_messageInfo_RawNebulaCertificate.Unmarshal(m, b)
+	if x != nil {
-}
+		return x.Details
-func (m *RawNebulaCertificate) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_RawNebulaCertificate.Marshal(b, m, deterministic)
-}
-func (m *RawNebulaCertificate) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_RawNebulaCertificate.Merge(m, src)
-}
-func (m *RawNebulaCertificate) XXX_Size() int {
-	return xxx_messageInfo_RawNebulaCertificate.Size(m)
-}
-func (m *RawNebulaCertificate) XXX_DiscardUnknown() {
-	xxx_messageInfo_RawNebulaCertificate.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_RawNebulaCertificate proto.InternalMessageInfo
-
-func (m *RawNebulaCertificate) GetDetails() *RawNebulaCertificateDetails {
-	if m != nil {
-		return m.Details
 	}
 	return nil
 }
 
-func (m *RawNebulaCertificate) GetSignature() []byte {
+func (x *RawNebulaCertificate) GetSignature() []byte {
-	if m != nil {
+	if x != nil {
-		return m.Signature
+		return x.Signature
 	}
 	return nil
 }
 
 type RawNebulaCertificateDetails struct {
-	Name string `protobuf:"bytes,1,opt,name=Name,json=name,proto3" json:"Name,omitempty"`
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name string `protobuf:"bytes,1,opt,name=Name,proto3" json:"Name,omitempty"`
 	// Ips and Subnets are in big endian 32 bit pairs, 1st the ip, 2nd the mask
-	Ips       []uint32 `protobuf:"varint,2,rep,packed,name=Ips,json=ips,proto3" json:"Ips,omitempty"`
+	Ips       []uint32 `protobuf:"varint,2,rep,packed,name=Ips,proto3" json:"Ips,omitempty"`
-	Subnets   []uint32 `protobuf:"varint,3,rep,packed,name=Subnets,json=subnets,proto3" json:"Subnets,omitempty"`
+	Subnets   []uint32 `protobuf:"varint,3,rep,packed,name=Subnets,proto3" json:"Subnets,omitempty"`
-	Groups    []string `protobuf:"bytes,4,rep,name=Groups,json=groups,proto3" json:"Groups,omitempty"`
+	Groups    []string `protobuf:"bytes,4,rep,name=Groups,proto3" json:"Groups,omitempty"`
-	NotBefore int64    `protobuf:"varint,5,opt,name=NotBefore,json=notBefore,proto3" json:"NotBefore,omitempty"`
+	NotBefore int64    `protobuf:"varint,5,opt,name=NotBefore,proto3" json:"NotBefore,omitempty"`
-	NotAfter  int64    `protobuf:"varint,6,opt,name=NotAfter,json=notAfter,proto3" json:"NotAfter,omitempty"`
+	NotAfter  int64    `protobuf:"varint,6,opt,name=NotAfter,proto3" json:"NotAfter,omitempty"`
-	PublicKey []byte   `protobuf:"bytes,7,opt,name=PublicKey,json=publicKey,proto3" json:"PublicKey,omitempty"`
+	PublicKey []byte   `protobuf:"bytes,7,opt,name=PublicKey,proto3" json:"PublicKey,omitempty"`
-	IsCA      bool     `protobuf:"varint,8,opt,name=IsCA,json=isCA,proto3" json:"IsCA,omitempty"`
+	IsCA      bool     `protobuf:"varint,8,opt,name=IsCA,proto3" json:"IsCA,omitempty"`
 	// sha-256 of the issuer certificate, if this field is blank the cert is self-signed
-	Issuer               []byte   `protobuf:"bytes,9,opt,name=Issuer,json=issuer,proto3" json:"Issuer,omitempty"`
+	Issuer []byte `protobuf:"bytes,9,opt,name=Issuer,proto3" json:"Issuer,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+}
-	XXX_unrecognized     []byte   `json:"-"`
+
-	XXX_sizecache        int32    `json:"-"`
+func (x *RawNebulaCertificateDetails) Reset() {
+	*x = RawNebulaCertificateDetails{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cert_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *RawNebulaCertificateDetails) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
 
-func (m *RawNebulaCertificateDetails) Reset()         { *m = RawNebulaCertificateDetails{} }
-func (m *RawNebulaCertificateDetails) String() string { return proto.CompactTextString(m) }
 func (*RawNebulaCertificateDetails) ProtoMessage() {}
+
+func (x *RawNebulaCertificateDetails) ProtoReflect() protoreflect.Message {
+	mi := &file_cert_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RawNebulaCertificateDetails.ProtoReflect.Descriptor instead.
 func (*RawNebulaCertificateDetails) Descriptor() ([]byte, []int) {
-	return fileDescriptor_a142e29cbef9b1cf, []int{1}
+	return file_cert_proto_rawDescGZIP(), []int{1}
 }
 
-func (m *RawNebulaCertificateDetails) XXX_Unmarshal(b []byte) error {
+func (x *RawNebulaCertificateDetails) GetName() string {
-	return xxx_messageInfo_RawNebulaCertificateDetails.Unmarshal(m, b)
+	if x != nil {
-}
+		return x.Name
-func (m *RawNebulaCertificateDetails) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_RawNebulaCertificateDetails.Marshal(b, m, deterministic)
-}
-func (m *RawNebulaCertificateDetails) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_RawNebulaCertificateDetails.Merge(m, src)
-}
-func (m *RawNebulaCertificateDetails) XXX_Size() int {
-	return xxx_messageInfo_RawNebulaCertificateDetails.Size(m)
-}
-func (m *RawNebulaCertificateDetails) XXX_DiscardUnknown() {
-	xxx_messageInfo_RawNebulaCertificateDetails.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_RawNebulaCertificateDetails proto.InternalMessageInfo
-
-func (m *RawNebulaCertificateDetails) GetName() string {
-	if m != nil {
-		return m.Name
 	}
 	return ""
 }
 
-func (m *RawNebulaCertificateDetails) GetIps() []uint32 {
+func (x *RawNebulaCertificateDetails) GetIps() []uint32 {
-	if m != nil {
+	if x != nil {
-		return m.Ips
+		return x.Ips
 	}
 	return nil
 }
 
-func (m *RawNebulaCertificateDetails) GetSubnets() []uint32 {
+func (x *RawNebulaCertificateDetails) GetSubnets() []uint32 {
-	if m != nil {
+	if x != nil {
-		return m.Subnets
+		return x.Subnets
 	}
 	return nil
 }
 
-func (m *RawNebulaCertificateDetails) GetGroups() []string {
+func (x *RawNebulaCertificateDetails) GetGroups() []string {
-	if m != nil {
+	if x != nil {
-		return m.Groups
+		return x.Groups
 	}
 	return nil
 }
 
-func (m *RawNebulaCertificateDetails) GetNotBefore() int64 {
+func (x *RawNebulaCertificateDetails) GetNotBefore() int64 {
-	if m != nil {
+	if x != nil {
-		return m.NotBefore
+		return x.NotBefore
 	}
 	return 0
 }
 
-func (m *RawNebulaCertificateDetails) GetNotAfter() int64 {
+func (x *RawNebulaCertificateDetails) GetNotAfter() int64 {
-	if m != nil {
+	if x != nil {
-		return m.NotAfter
+		return x.NotAfter
 	}
 	return 0
 }
 
-func (m *RawNebulaCertificateDetails) GetPublicKey() []byte {
+func (x *RawNebulaCertificateDetails) GetPublicKey() []byte {
-	if m != nil {
+	if x != nil {
-		return m.PublicKey
+		return x.PublicKey
 	}
 	return nil
 }
 
-func (m *RawNebulaCertificateDetails) GetIsCA() bool {
+func (x *RawNebulaCertificateDetails) GetIsCA() bool {
-	if m != nil {
+	if x != nil {
-		return m.IsCA
+		return x.IsCA
 	}
 	return false
 }
 
-func (m *RawNebulaCertificateDetails) GetIssuer() []byte {
+func (x *RawNebulaCertificateDetails) GetIssuer() []byte {
-	if m != nil {
+	if x != nil {
-		return m.Issuer
+		return x.Issuer
 	}
 	return nil
 }
 
-func init() {
+var File_cert_proto protoreflect.FileDescriptor
-	proto.RegisterType((*RawNebulaCertificate)(nil), "cert.RawNebulaCertificate")
+
-	proto.RegisterType((*RawNebulaCertificateDetails)(nil), "cert.RawNebulaCertificateDetails")
+var file_cert_proto_rawDesc = []byte{
+	0x0a, 0x0a, 0x63, 0x65, 0x72, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x04, 0x63, 0x65,
+	0x72, 0x74, 0x22, 0x71, 0x0a, 0x14, 0x52, 0x61, 0x77, 0x4e, 0x65, 0x62, 0x75, 0x6c, 0x61, 0x43,
+	0x65, 0x72, 0x74, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x65, 0x12, 0x3b, 0x0a, 0x07, 0x44, 0x65,
+	0x74, 0x61, 0x69, 0x6c, 0x73, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x21, 0x2e, 0x63, 0x65,
+	0x72, 0x74, 0x2e, 0x52, 0x61, 0x77, 0x4e, 0x65, 0x62, 0x75, 0x6c, 0x61, 0x43, 0x65, 0x72, 0x74,
+	0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x65, 0x44, 0x65, 0x74, 0x61, 0x69, 0x6c, 0x73, 0x52, 0x07,
+	0x44, 0x65, 0x74, 0x61, 0x69, 0x6c, 0x73, 0x12, 0x1c, 0x0a, 0x09, 0x53, 0x69, 0x67, 0x6e, 0x61,
+	0x74, 0x75, 0x72, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x09, 0x53, 0x69, 0x67, 0x6e,
+	0x61, 0x74, 0x75, 0x72, 0x65, 0x22, 0xf9, 0x01, 0x0a, 0x1b, 0x52, 0x61, 0x77, 0x4e, 0x65, 0x62,
+	0x75, 0x6c, 0x61, 0x43, 0x65, 0x72, 0x74, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x65, 0x44, 0x65,
+	0x74, 0x61, 0x69, 0x6c, 0x73, 0x12, 0x12, 0x0a, 0x04, 0x4e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20,
+	0x01, 0x28, 0x09, 0x52, 0x04, 0x4e, 0x61, 0x6d, 0x65, 0x12, 0x10, 0x0a, 0x03, 0x49, 0x70, 0x73,
+	0x18, 0x02, 0x20, 0x03, 0x28, 0x0d, 0x52, 0x03, 0x49, 0x70, 0x73, 0x12, 0x18, 0x0a, 0x07, 0x53,
+	0x75, 0x62, 0x6e, 0x65, 0x74, 0x73, 0x18, 0x03, 0x20, 0x03, 0x28, 0x0d, 0x52, 0x07, 0x53, 0x75,
+	0x62, 0x6e, 0x65, 0x74, 0x73, 0x12, 0x16, 0x0a, 0x06, 0x47, 0x72, 0x6f, 0x75, 0x70, 0x73, 0x18,
+	0x04, 0x20, 0x03, 0x28, 0x09, 0x52, 0x06, 0x47, 0x72, 0x6f, 0x75, 0x70, 0x73, 0x12, 0x1c, 0x0a,
+	0x09, 0x4e, 0x6f, 0x74, 0x42, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x18, 0x05, 0x20, 0x01, 0x28, 0x03,
+	0x52, 0x09, 0x4e, 0x6f, 0x74, 0x42, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x12, 0x1a, 0x0a, 0x08, 0x4e,
+	0x6f, 0x74, 0x41, 0x66, 0x74, 0x65, 0x72, 0x18, 0x06, 0x20, 0x01, 0x28, 0x03, 0x52, 0x08, 0x4e,
+	0x6f, 0x74, 0x41, 0x66, 0x74, 0x65, 0x72, 0x12, 0x1c, 0x0a, 0x09, 0x50, 0x75, 0x62, 0x6c, 0x69,
+	0x63, 0x4b, 0x65, 0x79, 0x18, 0x07, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x09, 0x50, 0x75, 0x62, 0x6c,
+	0x69, 0x63, 0x4b, 0x65, 0x79, 0x12, 0x12, 0x0a, 0x04, 0x49, 0x73, 0x43, 0x41, 0x18, 0x08, 0x20,
+	0x01, 0x28, 0x08, 0x52, 0x04, 0x49, 0x73, 0x43, 0x41, 0x12, 0x16, 0x0a, 0x06, 0x49, 0x73, 0x73,
+	0x75, 0x65, 0x72, 0x18, 0x09, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x06, 0x49, 0x73, 0x73, 0x75, 0x65,
+	0x72, 0x42, 0x20, 0x5a, 0x1e, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f,
+	0x73, 0x6c, 0x61, 0x63, 0x6b, 0x68, 0x71, 0x2f, 0x6e, 0x65, 0x62, 0x75, 0x6c, 0x61, 0x2f, 0x63,
+	0x65, 0x72, 0x74, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
-func init() { proto.RegisterFile("cert.proto", fileDescriptor_a142e29cbef9b1cf) }
+var (
+	file_cert_proto_rawDescOnce sync.Once
+	file_cert_proto_rawDescData = file_cert_proto_rawDesc
+)
 
-var fileDescriptor_a142e29cbef9b1cf = []byte{
+func file_cert_proto_rawDescGZIP() []byte {
-	// 279 bytes of a gzipped FileDescriptorProto
+	file_cert_proto_rawDescOnce.Do(func() {
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x90, 0xcf, 0x4a, 0xf4, 0x30,
+		file_cert_proto_rawDescData = protoimpl.X.CompressGZIP(file_cert_proto_rawDescData)
-	0x14, 0xc5, 0xc9, 0xa4, 0x5f, 0xdb, 0xe4, 0x53, 0x90, 0x20, 0x12, 0xd4, 0x45, 0x9c, 0x55, 0x56,
+	})
-	0xb3, 0xd0, 0xa5, 0xab, 0x71, 0x04, 0x29, 0x42, 0x91, 0xcc, 0x13, 0xa4, 0xf5, 0x76, 0x08, 0x74,
+	return file_cert_proto_rawDescData
-	0x9a, 0x9a, 0x3f, 0x88, 0x8f, 0xee, 0x4e, 0x9a, 0x4e, 0x77, 0xe2, 0xee, 0x9e, 0x5f, 0xce, 0x49,
+}
-	0x4e, 0x2e, 0xa5, 0x2d, 0xb8, 0xb0, 0x19, 0x9d, 0x0d, 0x96, 0x65, 0xd3, 0xbc, 0xfe, 0xa0, 0x97,
+
-	0x4a, 0x7f, 0xd6, 0xd0, 0xc4, 0x5e, 0xef, 0xc0, 0x05, 0xd3, 0x99, 0x56, 0x07, 0x60, 0x8f, 0xb4,
+var file_cert_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
-	0x78, 0x86, 0xa0, 0x4d, 0xef, 0x39, 0x12, 0x48, 0xfe, 0xbf, 0xbf, 0xdb, 0xa4, 0xec, 0x6f, 0xe6,
+var file_cert_proto_goTypes = []interface{}{
-	0x93, 0x51, 0x15, 0xef, 0xf3, 0xc0, 0x6e, 0x29, 0xd9, 0x9b, 0xc3, 0xa0, 0x43, 0x74, 0xc0, 0x57,
+	(*RawNebulaCertificate)(nil),        // 0: cert.RawNebulaCertificate
-	0x02, 0xc9, 0x33, 0x45, 0xfc, 0x02, 0xd6, 0xdf, 0x88, 0xde, 0xfc, 0x71, 0x0d, 0x63, 0x34, 0xab,
+	(*RawNebulaCertificateDetails)(nil), // 1: cert.RawNebulaCertificateDetails
-	0xf5, 0x11, 0xd2, 0xbb, 0x44, 0x65, 0x83, 0x3e, 0x02, 0xbb, 0xa0, 0xb8, 0x1a, 0x3d, 0x5f, 0x09,
+}
-	0x2c, 0xcf, 0x15, 0x36, 0xa3, 0x67, 0x9c, 0x16, 0xfb, 0xd8, 0x0c, 0x10, 0x3c, 0xc7, 0x89, 0x16,
+var file_cert_proto_depIdxs = []int32{
-	0x7e, 0x96, 0xec, 0x8a, 0xe6, 0x2f, 0xce, 0xc6, 0xd1, 0xf3, 0x4c, 0x60, 0x49, 0x54, 0x7e, 0x48,
+	1, // 0: cert.RawNebulaCertificate.Details:type_name -> cert.RawNebulaCertificateDetails
-	0x6a, 0x6a, 0x55, 0xdb, 0xf0, 0x04, 0x9d, 0x75, 0xc0, 0xff, 0x09, 0x24, 0xb1, 0x22, 0xc3, 0x02,
+	1, // [1:1] is the sub-list for method output_type
-	0xd8, 0x35, 0x2d, 0x6b, 0x1b, 0xb6, 0x5d, 0x00, 0xc7, 0xf3, 0x74, 0x58, 0x0e, 0x27, 0x3d, 0x25,
+	1, // [1:1] is the sub-list for method input_type
-	0xdf, 0x62, 0xd3, 0x9b, 0xf6, 0x15, 0xbe, 0x78, 0x31, 0xff, 0x67, 0x5c, 0xc0, 0xd4, 0xb7, 0xf2,
+	1, // [1:1] is the sub-list for extension type_name
-	0xbb, 0x2d, 0x2f, 0x05, 0x92, 0xa5, 0xca, 0x8c, 0xdf, 0x6d, 0xa7, 0x0e, 0x95, 0xf7, 0x11, 0x1c,
+	1, // [1:1] is the sub-list for extension extendee
-	0x27, 0xc9, 0x9e, 0x9b, 0xa4, 0x9a, 0x3c, 0xed, 0xfe, 0xe1, 0x27, 0x00, 0x00, 0xff, 0xff, 0x2c,
+	0, // [0:1] is the sub-list for field type_name
-	0xe3, 0x08, 0x37, 0x89, 0x01, 0x00, 0x00,
+}
+
+func init() { file_cert_proto_init() }
+func file_cert_proto_init() {
+	if File_cert_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_cert_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*RawNebulaCertificate); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_cert_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*RawNebulaCertificateDetails); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_cert_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_cert_proto_goTypes,
+		DependencyIndexes: file_cert_proto_depIdxs,
+		MessageInfos:      file_cert_proto_msgTypes,
+	}.Build()
+	File_cert_proto = out.File
+	file_cert_proto_rawDesc = nil
+	file_cert_proto_goTypes = nil
+	file_cert_proto_depIdxs = nil
 }

cert/cert.proto

@@ -1,6 +1,8 @@
 syntax = "proto3";
 package cert;
 
+option go_package = "github.com/slackhq/nebula/cert";
+
 //import "google/protobuf/timestamp.proto";
 
 message RawNebulaCertificate {

cert/cert_test.go

@@ -8,10 +8,11 @@ import (
 	"testing"
 	"time"
 
-	"github.com/golang/protobuf/proto"
+	"github.com/slackhq/nebula/test"
 	"github.com/stretchr/testify/assert"
 	"golang.org/x/crypto/curve25519"
 	"golang.org/x/crypto/ed25519"
+	"google.golang.org/protobuf/proto"
 )
 
 func TestMarshalingNebulaCertificate(t *testing.T) {
@@ -172,13 +173,13 @@ func TestNebulaCertificate_Verify(t *testing.T) {
 
 	f, err := c.Sha256Sum()
 	assert.Nil(t, err)
-	caPool.BlacklistFingerprint(f)
+	caPool.BlocklistFingerprint(f)
 
 	v, err := c.Verify(time.Now(), caPool)
 	assert.False(t, v)
-	assert.EqualError(t, err, "certificate has been blacklisted")
+	assert.EqualError(t, err, "certificate has been blocked")
 
-	caPool.ResetCertBlacklist()
+	caPool.ResetCertBlocklist()
 	v, err = c.Verify(time.Now(), caPool)
 	assert.True(t, v)
 	assert.Nil(t, err)
@@ -374,9 +375,16 @@ func TestNebulaCertificate_Verify_Subnets(t *testing.T) {
 	assert.Nil(t, err)
 }
 
-func TestNebulaVerifyPrivateKey(t *testing.T) {
+func TestNebulaCertificate_VerifyPrivateKey(t *testing.T) {
 	ca, _, caKey, err := newTestCaCert(time.Time{}, time.Time{}, []*net.IPNet{}, []*net.IPNet{}, []string{})
 	assert.Nil(t, err)
+	err = ca.VerifyPrivateKey(caKey)
+	assert.Nil(t, err)
+
+	_, _, caKey2, err := newTestCaCert(time.Time{}, time.Time{}, []*net.IPNet{}, []*net.IPNet{}, []string{})
+	assert.Nil(t, err)
+	err = ca.VerifyPrivateKey(caKey2)
+	assert.NotNil(t, err)
 
 	c, _, priv, err := newTestCert(ca, caKey, time.Time{}, time.Time{}, []*net.IPNet{}, []*net.IPNet{}, []string{})
 	err = c.VerifyPrivateKey(priv)
@@ -421,6 +429,15 @@ BVG+oJpAoqokUBbI4U0N8CSfpUABEkB/Pm5A2xyH/nc8mg/wvGUWG3pZ7nHzaDMf
 8/phAUt+FLzqTECzQKisYswKvE3pl9mbEYKbOdIHrxdIp95mo4sF
 -----END NEBULA CERTIFICATE-----
 
+`
+
+	expired := `
+# expired certificate
+-----BEGIN NEBULA CERTIFICATE-----
+CjkKB2V4cGlyZWQouPmWjQYwufmWjQY6ILCRaoCkJlqHgv5jfDN4lzLHBvDzaQm4
+vZxfu144hmgjQAESQG4qlnZi8DncvD/LDZnLgJHOaX1DWCHHEh59epVsC+BNgTie
+WH1M9n4O7cFtGlM6sJJOS+rCVVEJ3ABS7+MPdQs=
+-----END NEBULA CERTIFICATE-----
 `
 
 	rootCA := NebulaCertificate{
@@ -444,6 +461,268 @@ BVG+oJpAoqokUBbI4U0N8CSfpUABEkB/Pm5A2xyH/nc8mg/wvGUWG3pZ7nHzaDMf
 	assert.Nil(t, err)
 	assert.Equal(t, pp.CAs[string("c9bfaf7ce8e84b2eeda2e27b469f4b9617bde192efd214b68891ecda6ed49522")].Details.Name, rootCA.Details.Name)
 	assert.Equal(t, pp.CAs[string("5c9c3f23e7ee7fe97637cbd3a0a5b854154d1d9aaaf7b566a51f4a88f76b64cd")].Details.Name, rootCA01.Details.Name)
+
+	// expired cert, no valid certs
+	ppp, err := NewCAPoolFromBytes([]byte(expired))
+	assert.Equal(t, ErrExpired, err)
+	assert.Equal(t, ppp.CAs[string("152070be6bb19bc9e3bde4c2f0e7d8f4ff5448b4c9856b8eccb314fade0229b0")].Details.Name, "expired")
+
+	// expired cert, with valid certs
+	pppp, err := NewCAPoolFromBytes(append([]byte(expired), noNewLines...))
+	assert.Equal(t, ErrExpired, err)
+	assert.Equal(t, pppp.CAs[string("c9bfaf7ce8e84b2eeda2e27b469f4b9617bde192efd214b68891ecda6ed49522")].Details.Name, rootCA.Details.Name)
+	assert.Equal(t, pppp.CAs[string("5c9c3f23e7ee7fe97637cbd3a0a5b854154d1d9aaaf7b566a51f4a88f76b64cd")].Details.Name, rootCA01.Details.Name)
+	assert.Equal(t, pppp.CAs[string("152070be6bb19bc9e3bde4c2f0e7d8f4ff5448b4c9856b8eccb314fade0229b0")].Details.Name, "expired")
+	assert.Equal(t, len(pppp.CAs), 3)
+}
+
+func appendByteSlices(b ...[]byte) []byte {
+	retSlice := []byte{}
+	for _, v := range b {
+		retSlice = append(retSlice, v...)
+	}
+	return retSlice
+}
+
+func TestUnmrshalCertPEM(t *testing.T) {
+	goodCert := []byte(`
+# A good cert
+-----BEGIN NEBULA CERTIFICATE-----
+CkAKDm5lYnVsYSByb290IGNhKJfap9AFMJfg1+YGOiCUQGByMuNRhIlQBOyzXWbL
+vcKBwDhov900phEfJ5DN3kABEkDCq5R8qBiu8sl54yVfgRcQXEDt3cHr8UTSLszv
+bzBEr00kERQxxTzTsH8cpYEgRoipvmExvg8WP8NdAJEYJosB
+-----END NEBULA CERTIFICATE-----
+`)
+	badBanner := []byte(`# A bad banner
+-----BEGIN NOT A NEBULA CERTIFICATE-----
+CkAKDm5lYnVsYSByb290IGNhKJfap9AFMJfg1+YGOiCUQGByMuNRhIlQBOyzXWbL
+vcKBwDhov900phEfJ5DN3kABEkDCq5R8qBiu8sl54yVfgRcQXEDt3cHr8UTSLszv
+bzBEr00kERQxxTzTsH8cpYEgRoipvmExvg8WP8NdAJEYJosB
+-----END NOT A NEBULA CERTIFICATE-----
+`)
+	invalidPem := []byte(`# Not a valid PEM format
+-BEGIN NEBULA CERTIFICATE-----
+CkAKDm5lYnVsYSByb290IGNhKJfap9AFMJfg1+YGOiCUQGByMuNRhIlQBOyzXWbL
+vcKBwDhov900phEfJ5DN3kABEkDCq5R8qBiu8sl54yVfgRcQXEDt3cHr8UTSLszv
+bzBEr00kERQxxTzTsH8cpYEgRoipvmExvg8WP8NdAJEYJosB
+-END NEBULA CERTIFICATE----`)
+
+	certBundle := appendByteSlices(goodCert, badBanner, invalidPem)
+
+	// Success test case
+	cert, rest, err := UnmarshalNebulaCertificateFromPEM(certBundle)
+	assert.NotNil(t, cert)
+	assert.Equal(t, rest, append(badBanner, invalidPem...))
+	assert.Nil(t, err)
+
+	// Fail due to invalid banner.
+	cert, rest, err = UnmarshalNebulaCertificateFromPEM(rest)
+	assert.Nil(t, cert)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "bytes did not contain a proper nebula certificate banner")
+
+	// Fail due to ivalid PEM format, because
+	// it's missing the requisite pre-encapsulation boundary.
+	cert, rest, err = UnmarshalNebulaCertificateFromPEM(rest)
+	assert.Nil(t, cert)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "input did not contain a valid PEM encoded block")
+}
+
+func TestUnmarshalEd25519PrivateKey(t *testing.T) {
+	privKey := []byte(`# A good key
+-----BEGIN NEBULA ED25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-----END NEBULA ED25519 PRIVATE KEY-----
+`)
+	shortKey := []byte(`# A short key
+-----BEGIN NEBULA ED25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+-----END NEBULA ED25519 PRIVATE KEY-----
+`)
+	invalidBanner := []byte(`# Invalid banner
+-----BEGIN NOT A NEBULA PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-----END NOT A NEBULA PRIVATE KEY-----
+`)
+	invalidPem := []byte(`# Not a valid PEM format
+-BEGIN NEBULA ED25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-END NEBULA ED25519 PRIVATE KEY-----`)
+
+	keyBundle := appendByteSlices(privKey, shortKey, invalidBanner, invalidPem)
+
+	// Success test case
+	k, rest, err := UnmarshalEd25519PrivateKey(keyBundle)
+	assert.Len(t, k, 64)
+	assert.Equal(t, rest, appendByteSlices(shortKey, invalidBanner, invalidPem))
+	assert.Nil(t, err)
+
+	// Fail due to short key
+	k, rest, err = UnmarshalEd25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, appendByteSlices(invalidBanner, invalidPem))
+	assert.EqualError(t, err, "key was not 64 bytes, is invalid ed25519 private key")
+
+	// Fail due to invalid banner
+	k, rest, err = UnmarshalEd25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "bytes did not contain a proper nebula Ed25519 private key banner")
+
+	// Fail due to ivalid PEM format, because
+	// it's missing the requisite pre-encapsulation boundary.
+	k, rest, err = UnmarshalEd25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "input did not contain a valid PEM encoded block")
+}
+
+func TestUnmarshalX25519PrivateKey(t *testing.T) {
+	privKey := []byte(`# A good key
+-----BEGIN NEBULA X25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NEBULA X25519 PRIVATE KEY-----
+`)
+	shortKey := []byte(`# A short key
+-----BEGIN NEBULA X25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-----END NEBULA X25519 PRIVATE KEY-----
+`)
+	invalidBanner := []byte(`# Invalid banner
+-----BEGIN NOT A NEBULA PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NOT A NEBULA PRIVATE KEY-----
+`)
+	invalidPem := []byte(`# Not a valid PEM format
+-BEGIN NEBULA X25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-END NEBULA X25519 PRIVATE KEY-----`)
+
+	keyBundle := appendByteSlices(privKey, shortKey, invalidBanner, invalidPem)
+
+	// Success test case
+	k, rest, err := UnmarshalX25519PrivateKey(keyBundle)
+	assert.Len(t, k, 32)
+	assert.Equal(t, rest, appendByteSlices(shortKey, invalidBanner, invalidPem))
+	assert.Nil(t, err)
+
+	// Fail due to short key
+	k, rest, err = UnmarshalX25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, appendByteSlices(invalidBanner, invalidPem))
+	assert.EqualError(t, err, "key was not 32 bytes, is invalid X25519 private key")
+
+	// Fail due to invalid banner
+	k, rest, err = UnmarshalX25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "bytes did not contain a proper nebula X25519 private key banner")
+
+	// Fail due to ivalid PEM format, because
+	// it's missing the requisite pre-encapsulation boundary.
+	k, rest, err = UnmarshalX25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "input did not contain a valid PEM encoded block")
+}
+
+func TestUnmarshalEd25519PublicKey(t *testing.T) {
+	pubKey := []byte(`# A good key
+-----BEGIN NEBULA ED25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NEBULA ED25519 PUBLIC KEY-----
+`)
+	shortKey := []byte(`# A short key
+-----BEGIN NEBULA ED25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-----END NEBULA ED25519 PUBLIC KEY-----
+`)
+	invalidBanner := []byte(`# Invalid banner
+-----BEGIN NOT A NEBULA PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NOT A NEBULA PUBLIC KEY-----
+`)
+	invalidPem := []byte(`# Not a valid PEM format
+-BEGIN NEBULA ED25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-END NEBULA ED25519 PUBLIC KEY-----`)
+
+	keyBundle := appendByteSlices(pubKey, shortKey, invalidBanner, invalidPem)
+
+	// Success test case
+	k, rest, err := UnmarshalEd25519PublicKey(keyBundle)
+	assert.Equal(t, len(k), 32)
+	assert.Nil(t, err)
+	assert.Equal(t, rest, appendByteSlices(shortKey, invalidBanner, invalidPem))
+
+	// Fail due to short key
+	k, rest, err = UnmarshalEd25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, appendByteSlices(invalidBanner, invalidPem))
+	assert.EqualError(t, err, "key was not 32 bytes, is invalid ed25519 public key")
+
+	// Fail due to invalid banner
+	k, rest, err = UnmarshalEd25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.EqualError(t, err, "bytes did not contain a proper nebula Ed25519 public key banner")
+	assert.Equal(t, rest, invalidPem)
+
+	// Fail due to ivalid PEM format, because
+	// it's missing the requisite pre-encapsulation boundary.
+	k, rest, err = UnmarshalEd25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "input did not contain a valid PEM encoded block")
+}
+
+func TestUnmarshalX25519PublicKey(t *testing.T) {
+	pubKey := []byte(`# A good key
+-----BEGIN NEBULA X25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NEBULA X25519 PUBLIC KEY-----
+`)
+	shortKey := []byte(`# A short key
+-----BEGIN NEBULA X25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-----END NEBULA X25519 PUBLIC KEY-----
+`)
+	invalidBanner := []byte(`# Invalid banner
+-----BEGIN NOT A NEBULA PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NOT A NEBULA PUBLIC KEY-----
+`)
+	invalidPem := []byte(`# Not a valid PEM format
+-BEGIN NEBULA X25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-END NEBULA X25519 PUBLIC KEY-----`)
+
+	keyBundle := appendByteSlices(pubKey, shortKey, invalidBanner, invalidPem)
+
+	// Success test case
+	k, rest, err := UnmarshalX25519PublicKey(keyBundle)
+	assert.Equal(t, len(k), 32)
+	assert.Nil(t, err)
+	assert.Equal(t, rest, appendByteSlices(shortKey, invalidBanner, invalidPem))
+
+	// Fail due to short key
+	k, rest, err = UnmarshalX25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, appendByteSlices(invalidBanner, invalidPem))
+	assert.EqualError(t, err, "key was not 32 bytes, is invalid X25519 public key")
+
+	// Fail due to invalid banner
+	k, rest, err = UnmarshalX25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.EqualError(t, err, "bytes did not contain a proper nebula X25519 public key banner")
+	assert.Equal(t, rest, invalidPem)
+
+	// Fail due to ivalid PEM format, because
+	// it's missing the requisite pre-encapsulation boundary.
+	k, rest, err = UnmarshalX25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "input did not contain a valid PEM encoded block")
 }
 
 // Ensure that upgrading the protobuf library does not change how certificates
@@ -487,6 +766,24 @@ func TestMarshalingNebulaCertificateConsistency(t *testing.T) {
 	assert.Equal(t, "0a0774657374696e67121b8182845080feffff0f828284508080fcff0f8382845080fe83f80f1a1b8182844880fe83f80f8282844880feffff0f838284488080fcff0f220b746573742d67726f757031220b746573742d67726f757032220b746573742d67726f75703328f0e0e7d70430a08681c4053a20313233343536373839306162636564666768696a3132333435363738393061624a081234567890abcedf", fmt.Sprintf("%x", b))
 }
 
+func TestNebulaCertificate_Copy(t *testing.T) {
+	ca, _, caKey, err := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	assert.Nil(t, err)
+
+	c, _, _, err := newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	assert.Nil(t, err)
+	cc := c.Copy()
+
+	test.AssertDeepCopyEqual(t, c, cc)
+}
+
+func TestUnmarshalNebulaCertificate(t *testing.T) {
+	// Test that we don't panic with an invalid certificate (#332)
+	data := []byte("\x98\x00\x00")
+	_, err := UnmarshalNebulaCertificate(data)
+	assert.EqualError(t, err, "encoded Details was nil")
+}
+
 func newTestCaCert(before, after time.Time, ips, subnets []*net.IPNet, groups []string) (*NebulaCertificate, []byte, []byte, error) {
 	pub, priv, err := ed25519.GenerateKey(rand.Reader)
 	if before.IsZero() {
@@ -499,10 +796,11 @@ func newTestCaCert(before, after time.Time, ips, subnets []*net.IPNet, groups []
 	nc := &NebulaCertificate{
 		Details: NebulaCertificateDetails{
 			Name:           "test ca",
-			NotBefore: before,
+			NotBefore:      time.Unix(before.Unix(), 0),
-			NotAfter:  after,
+			NotAfter:       time.Unix(after.Unix(), 0),
 			PublicKey:      pub,
 			IsCA:           true,
+			InvertedGroups: make(map[string]struct{}),
 		},
 	}
 
@@ -544,17 +842,17 @@ func newTestCert(ca *NebulaCertificate, key []byte, before, after time.Time, ips
 
 	if len(ips) == 0 {
 		ips = []*net.IPNet{
-			{IP: net.ParseIP("10.1.1.1"), Mask: net.IPMask(net.ParseIP("255.255.255.0"))},
+			{IP: net.ParseIP("10.1.1.1").To4(), Mask: net.IPMask(net.ParseIP("255.255.255.0").To4())},
-			{IP: net.ParseIP("10.1.1.2"), Mask: net.IPMask(net.ParseIP("255.255.0.0"))},
+			{IP: net.ParseIP("10.1.1.2").To4(), Mask: net.IPMask(net.ParseIP("255.255.0.0").To4())},
-			{IP: net.ParseIP("10.1.1.3"), Mask: net.IPMask(net.ParseIP("255.0.255.0"))},
+			{IP: net.ParseIP("10.1.1.3").To4(), Mask: net.IPMask(net.ParseIP("255.0.255.0").To4())},
 		}
 	}
 
 	if len(subnets) == 0 {
 		subnets = []*net.IPNet{
-			{IP: net.ParseIP("9.1.1.1"), Mask: net.IPMask(net.ParseIP("255.0.255.0"))},
+			{IP: net.ParseIP("9.1.1.1").To4(), Mask: net.IPMask(net.ParseIP("255.0.255.0").To4())},
-			{IP: net.ParseIP("9.1.1.2"), Mask: net.IPMask(net.ParseIP("255.255.255.0"))},
+			{IP: net.ParseIP("9.1.1.2").To4(), Mask: net.IPMask(net.ParseIP("255.255.255.0").To4())},
-			{IP: net.ParseIP("9.1.1.3"), Mask: net.IPMask(net.ParseIP("255.255.0.0"))},
+			{IP: net.ParseIP("9.1.1.3").To4(), Mask: net.IPMask(net.ParseIP("255.255.0.0").To4())},
 		}
 	}
 
@@ -566,11 +864,12 @@ func newTestCert(ca *NebulaCertificate, key []byte, before, after time.Time, ips
 			Ips:            ips,
 			Subnets:        subnets,
 			Groups:         groups,
-			NotBefore: before,
+			NotBefore:      time.Unix(before.Unix(), 0),
-			NotAfter:  after,
+			NotAfter:       time.Unix(after.Unix(), 0),
 			PublicKey:      pub,
 			IsCA:           false,
 			Issuer:         issuer,
+			InvertedGroups: make(map[string]struct{}),
 		},
 	}
 
@@ -583,10 +882,15 @@ func newTestCert(ca *NebulaCertificate, key []byte, before, after time.Time, ips
 }
 
 func x25519Keypair() ([]byte, []byte) {
-	var pubkey, privkey [32]byte
+	privkey := make([]byte, 32)
-	if _, err := io.ReadFull(rand.Reader, privkey[:]); err != nil {
+	if _, err := io.ReadFull(rand.Reader, privkey); err != nil {
 		panic(err)
 	}
-	curve25519.ScalarBaseMult(&pubkey, &privkey)
+
-	return pubkey[:], privkey[:]
+	pubkey, err := curve25519.X25519(privkey, curve25519.Basepoint)
+	if err != nil {
+		panic(err)
+	}
+
+	return pubkey, privkey
 }

cert/errors.go

@@ -0,0 +1,9 @@
+package cert
+
+import "errors"
+
+var (
+	ErrExpired       = errors.New("certificate is expired")
+	ErrNotCA         = errors.New("certificate is not a CA")
+	ErrNotSelfSigned = errors.New("certificate is not self-signed")
+)

cidr/parse.go

@@ -0,0 +1,10 @@
+package cidr
+
+import "net"
+
+// Parse is a convenience function that returns only the IPNet
+// This function ignores errors since it is primarily a test helper, the result could be nil
+func Parse(s string) *net.IPNet {
+	_, c, _ := net.ParseCIDR(s)
+	return c
+}

cidr/tree4.go

@@ -1,39 +1,39 @@
-package nebula
+package cidr
 
 import (
-	"encoding/binary"
-	"fmt"
 	"net"
+
+	"github.com/slackhq/nebula/iputil"
 )
 
-type CIDRNode struct {
+type Node struct {
-	left   *CIDRNode
+	left   *Node
-	right  *CIDRNode
+	right  *Node
-	parent *CIDRNode
+	parent *Node
 	value  interface{}
 }
 
-type CIDRTree struct {
+type Tree4 struct {
-	root *CIDRNode
+	root *Node
 }
 
 const (
-	startbit = uint32(0x80000000)
+	startbit = iputil.VpnIp(0x80000000)
 )
 
-func NewCIDRTree() *CIDRTree {
+func NewTree4() *Tree4 {
-	tree := new(CIDRTree)
+	tree := new(Tree4)
-	tree.root = &CIDRNode{}
+	tree.root = &Node{}
 	return tree
 }
 
-func (tree *CIDRTree) AddCIDR(cidr *net.IPNet, val interface{}) {
+func (tree *Tree4) AddCIDR(cidr *net.IPNet, val interface{}) {
 	bit := startbit
 	node := tree.root
 	next := tree.root
 
-	ip := ip2int(cidr.IP)
+	ip := iputil.Ip2VpnIp(cidr.IP)
-	mask := ip2int(cidr.Mask)
+	mask := iputil.Ip2VpnIp(cidr.Mask)
 
 	// Find our last ancestor in the tree
 	for bit&mask != 0 {
@@ -59,7 +59,7 @@ func (tree *CIDRTree) AddCIDR(cidr *net.IPNet, val interface{}) {
 
 	// Build up the rest of the tree we don't already have
 	for bit&mask != 0 {
-		next = &CIDRNode{}
+		next = &Node{}
 		next.parent = node
 
 		if ip&bit != 0 {
@@ -76,8 +76,8 @@ func (tree *CIDRTree) AddCIDR(cidr *net.IPNet, val interface{}) {
 	node.value = val
 }
 
-// Finds the first match, which way be the least specific
+// Finds the first match, which may be the least specific
-func (tree *CIDRTree) Contains(ip uint32) (value interface{}) {
+func (tree *Tree4) Contains(ip iputil.VpnIp) (value interface{}) {
 	bit := startbit
 	node := tree.root
 
@@ -100,7 +100,7 @@ func (tree *CIDRTree) Contains(ip uint32) (value interface{}) {
 }
 
 // Finds the most specific match
-func (tree *CIDRTree) MostSpecificContains(ip uint32) (value interface{}) {
+func (tree *Tree4) MostSpecificContains(ip iputil.VpnIp) (value interface{}) {
 	bit := startbit
 	node := tree.root
 
@@ -116,14 +116,13 @@ func (tree *CIDRTree) MostSpecificContains(ip uint32) (value interface{}) {
 		}
 
 		bit >>= 1
-
 	}
 
 	return value
 }
 
 // Finds the most specific match
-func (tree *CIDRTree) Match(ip uint32) (value interface{}) {
+func (tree *Tree4) Match(ip iputil.VpnIp) (value interface{}) {
 	bit := startbit
 	node := tree.root
 	lastNode := node
@@ -144,27 +143,3 @@ func (tree *CIDRTree) Match(ip uint32) (value interface{}) {
 	}
 	return value
 }
-
-// A helper type to avoid converting to IP when logging
-type IntIp uint32
-
-func (ip IntIp) String() string {
-	return fmt.Sprintf("%v", int2ip(uint32(ip)))
-}
-
-func (ip IntIp) MarshalJSON() ([]byte, error) {
-	return []byte(fmt.Sprintf("\"%s\"", int2ip(uint32(ip)).String())), nil
-}
-
-func ip2int(ip []byte) uint32 {
-	if len(ip) == 16 {
-		return binary.BigEndian.Uint32(ip[12:16])
-	}
-	return binary.BigEndian.Uint32(ip)
-}
-
-func int2ip(nn uint32) net.IP {
-	ip := make(net.IP, 4)
-	binary.BigEndian.PutUint32(ip, nn)
-	return ip
-}

cidr/tree4_test.go

@@ -0,0 +1,153 @@
+package cidr
+
+import (
+	"net"
+	"testing"
+
+	"github.com/slackhq/nebula/iputil"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCIDRTree_Contains(t *testing.T) {
+	tree := NewTree4()
+	tree.AddCIDR(Parse("1.0.0.0/8"), "1")
+	tree.AddCIDR(Parse("2.1.0.0/16"), "2")
+	tree.AddCIDR(Parse("3.1.1.0/24"), "3")
+	tree.AddCIDR(Parse("4.1.1.0/24"), "4a")
+	tree.AddCIDR(Parse("4.1.1.1/32"), "4b")
+	tree.AddCIDR(Parse("4.1.2.1/32"), "4c")
+	tree.AddCIDR(Parse("254.0.0.0/4"), "5")
+
+	tests := []struct {
+		Result interface{}
+		IP     string
+	}{
+		{"1", "1.0.0.0"},
+		{"1", "1.255.255.255"},
+		{"2", "2.1.0.0"},
+		{"2", "2.1.255.255"},
+		{"3", "3.1.1.0"},
+		{"3", "3.1.1.255"},
+		{"4a", "4.1.1.255"},
+		{"4a", "4.1.1.1"},
+		{"5", "240.0.0.0"},
+		{"5", "255.255.255.255"},
+		{nil, "239.0.0.0"},
+		{nil, "4.1.2.2"},
+	}
+
+	for _, tt := range tests {
+		assert.Equal(t, tt.Result, tree.Contains(iputil.Ip2VpnIp(net.ParseIP(tt.IP))))
+	}
+
+	tree = NewTree4()
+	tree.AddCIDR(Parse("1.1.1.1/0"), "cool")
+	assert.Equal(t, "cool", tree.Contains(iputil.Ip2VpnIp(net.ParseIP("0.0.0.0"))))
+	assert.Equal(t, "cool", tree.Contains(iputil.Ip2VpnIp(net.ParseIP("255.255.255.255"))))
+}
+
+func TestCIDRTree_MostSpecificContains(t *testing.T) {
+	tree := NewTree4()
+	tree.AddCIDR(Parse("1.0.0.0/8"), "1")
+	tree.AddCIDR(Parse("2.1.0.0/16"), "2")
+	tree.AddCIDR(Parse("3.1.1.0/24"), "3")
+	tree.AddCIDR(Parse("4.1.1.0/24"), "4a")
+	tree.AddCIDR(Parse("4.1.1.0/30"), "4b")
+	tree.AddCIDR(Parse("4.1.1.1/32"), "4c")
+	tree.AddCIDR(Parse("254.0.0.0/4"), "5")
+
+	tests := []struct {
+		Result interface{}
+		IP     string
+	}{
+		{"1", "1.0.0.0"},
+		{"1", "1.255.255.255"},
+		{"2", "2.1.0.0"},
+		{"2", "2.1.255.255"},
+		{"3", "3.1.1.0"},
+		{"3", "3.1.1.255"},
+		{"4a", "4.1.1.255"},
+		{"4b", "4.1.1.2"},
+		{"4c", "4.1.1.1"},
+		{"5", "240.0.0.0"},
+		{"5", "255.255.255.255"},
+		{nil, "239.0.0.0"},
+		{nil, "4.1.2.2"},
+	}
+
+	for _, tt := range tests {
+		assert.Equal(t, tt.Result, tree.MostSpecificContains(iputil.Ip2VpnIp(net.ParseIP(tt.IP))))
+	}
+
+	tree = NewTree4()
+	tree.AddCIDR(Parse("1.1.1.1/0"), "cool")
+	assert.Equal(t, "cool", tree.MostSpecificContains(iputil.Ip2VpnIp(net.ParseIP("0.0.0.0"))))
+	assert.Equal(t, "cool", tree.MostSpecificContains(iputil.Ip2VpnIp(net.ParseIP("255.255.255.255"))))
+}
+
+func TestCIDRTree_Match(t *testing.T) {
+	tree := NewTree4()
+	tree.AddCIDR(Parse("4.1.1.0/32"), "1a")
+	tree.AddCIDR(Parse("4.1.1.1/32"), "1b")
+
+	tests := []struct {
+		Result interface{}
+		IP     string
+	}{
+		{"1a", "4.1.1.0"},
+		{"1b", "4.1.1.1"},
+	}
+
+	for _, tt := range tests {
+		assert.Equal(t, tt.Result, tree.Match(iputil.Ip2VpnIp(net.ParseIP(tt.IP))))
+	}
+
+	tree = NewTree4()
+	tree.AddCIDR(Parse("1.1.1.1/0"), "cool")
+	assert.Equal(t, "cool", tree.Contains(iputil.Ip2VpnIp(net.ParseIP("0.0.0.0"))))
+	assert.Equal(t, "cool", tree.Contains(iputil.Ip2VpnIp(net.ParseIP("255.255.255.255"))))
+}
+
+func BenchmarkCIDRTree_Contains(b *testing.B) {
+	tree := NewTree4()
+	tree.AddCIDR(Parse("1.1.0.0/16"), "1")
+	tree.AddCIDR(Parse("1.2.1.1/32"), "1")
+	tree.AddCIDR(Parse("192.2.1.1/32"), "1")
+	tree.AddCIDR(Parse("172.2.1.1/32"), "1")
+
+	ip := iputil.Ip2VpnIp(net.ParseIP("1.2.1.1"))
+	b.Run("found", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			tree.Contains(ip)
+		}
+	})
+
+	ip = iputil.Ip2VpnIp(net.ParseIP("1.2.1.255"))
+	b.Run("not found", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			tree.Contains(ip)
+		}
+	})
+}
+
+func BenchmarkCIDRTree_Match(b *testing.B) {
+	tree := NewTree4()
+	tree.AddCIDR(Parse("1.1.0.0/16"), "1")
+	tree.AddCIDR(Parse("1.2.1.1/32"), "1")
+	tree.AddCIDR(Parse("192.2.1.1/32"), "1")
+	tree.AddCIDR(Parse("172.2.1.1/32"), "1")
+
+	ip := iputil.Ip2VpnIp(net.ParseIP("1.2.1.1"))
+	b.Run("found", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			tree.Match(ip)
+		}
+	})
+
+	ip = iputil.Ip2VpnIp(net.ParseIP("1.2.1.255"))
+	b.Run("not found", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			tree.Match(ip)
+		}
+	})
+}

cidr/tree6.go

@@ -0,0 +1,185 @@
+package cidr
+
+import (
+	"net"
+
+	"github.com/slackhq/nebula/iputil"
+)
+
+const startbit6 = uint64(1 << 63)
+
+type Tree6 struct {
+	root4 *Node
+	root6 *Node
+}
+
+func NewTree6() *Tree6 {
+	tree := new(Tree6)
+	tree.root4 = &Node{}
+	tree.root6 = &Node{}
+	return tree
+}
+
+func (tree *Tree6) AddCIDR(cidr *net.IPNet, val interface{}) {
+	var node, next *Node
+
+	cidrIP, ipv4 := isIPV4(cidr.IP)
+	if ipv4 {
+		node = tree.root4
+		next = tree.root4
+
+	} else {
+		node = tree.root6
+		next = tree.root6
+	}
+
+	for i := 0; i < len(cidrIP); i += 4 {
+		ip := iputil.Ip2VpnIp(cidrIP[i : i+4])
+		mask := iputil.Ip2VpnIp(cidr.Mask[i : i+4])
+		bit := startbit
+
+		// Find our last ancestor in the tree
+		for bit&mask != 0 {
+			if ip&bit != 0 {
+				next = node.right
+			} else {
+				next = node.left
+			}
+
+			if next == nil {
+				break
+			}
+
+			bit = bit >> 1
+			node = next
+		}
+
+		// Build up the rest of the tree we don't already have
+		for bit&mask != 0 {
+			next = &Node{}
+			next.parent = node
+
+			if ip&bit != 0 {
+				node.right = next
+			} else {
+				node.left = next
+			}
+
+			bit >>= 1
+			node = next
+		}
+	}
+
+	// Final node marks our cidr, set the value
+	node.value = val
+}
+
+// Finds the most specific match
+func (tree *Tree6) MostSpecificContains(ip net.IP) (value interface{}) {
+	var node *Node
+
+	wholeIP, ipv4 := isIPV4(ip)
+	if ipv4 {
+		node = tree.root4
+	} else {
+		node = tree.root6
+	}
+
+	for i := 0; i < len(wholeIP); i += 4 {
+		ip := iputil.Ip2VpnIp(wholeIP[i : i+4])
+		bit := startbit
+
+		for node != nil {
+			if node.value != nil {
+				value = node.value
+			}
+
+			if bit == 0 {
+				break
+			}
+
+			if ip&bit != 0 {
+				node = node.right
+			} else {
+				node = node.left
+			}
+
+			bit >>= 1
+		}
+	}
+
+	return value
+}
+
+func (tree *Tree6) MostSpecificContainsIpV4(ip iputil.VpnIp) (value interface{}) {
+	bit := startbit
+	node := tree.root4
+
+	for node != nil {
+		if node.value != nil {
+			value = node.value
+		}
+
+		if ip&bit != 0 {
+			node = node.right
+		} else {
+			node = node.left
+		}
+
+		bit >>= 1
+	}
+
+	return value
+}
+
+func (tree *Tree6) MostSpecificContainsIpV6(hi, lo uint64) (value interface{}) {
+	ip := hi
+	node := tree.root6
+
+	for i := 0; i < 2; i++ {
+		bit := startbit6
+
+		for node != nil {
+			if node.value != nil {
+				value = node.value
+			}
+
+			if bit == 0 {
+				break
+			}
+
+			if ip&bit != 0 {
+				node = node.right
+			} else {
+				node = node.left
+			}
+
+			bit >>= 1
+		}
+
+		ip = lo
+	}
+
+	return value
+}
+
+func isIPV4(ip net.IP) (net.IP, bool) {
+	if len(ip) == net.IPv4len {
+		return ip, true
+	}
+
+	if len(ip) == net.IPv6len && isZeros(ip[0:10]) && ip[10] == 0xff && ip[11] == 0xff {
+		return ip[12:16], true
+	}
+
+	return ip, false
+}
+
+func isZeros(p net.IP) bool {
+	for i := 0; i < len(p); i++ {
+		if p[i] != 0 {
+			return false
+		}
+	}
+	return true
+}

cidr/tree6_test.go

@@ -0,0 +1,81 @@
+package cidr
+
+import (
+	"encoding/binary"
+	"net"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCIDR6Tree_MostSpecificContains(t *testing.T) {
+	tree := NewTree6()
+	tree.AddCIDR(Parse("1.0.0.0/8"), "1")
+	tree.AddCIDR(Parse("2.1.0.0/16"), "2")
+	tree.AddCIDR(Parse("3.1.1.0/24"), "3")
+	tree.AddCIDR(Parse("4.1.1.1/24"), "4a")
+	tree.AddCIDR(Parse("4.1.1.1/30"), "4b")
+	tree.AddCIDR(Parse("4.1.1.1/32"), "4c")
+	tree.AddCIDR(Parse("254.0.0.0/4"), "5")
+	tree.AddCIDR(Parse("1:2:0:4:5:0:0:0/64"), "6a")
+	tree.AddCIDR(Parse("1:2:0:4:5:0:0:0/80"), "6b")
+	tree.AddCIDR(Parse("1:2:0:4:5:0:0:0/96"), "6c")
+
+	tests := []struct {
+		Result interface{}
+		IP     string
+	}{
+		{"1", "1.0.0.0"},
+		{"1", "1.255.255.255"},
+		{"2", "2.1.0.0"},
+		{"2", "2.1.255.255"},
+		{"3", "3.1.1.0"},
+		{"3", "3.1.1.255"},
+		{"4a", "4.1.1.255"},
+		{"4b", "4.1.1.2"},
+		{"4c", "4.1.1.1"},
+		{"5", "240.0.0.0"},
+		{"5", "255.255.255.255"},
+		{"6a", "1:2:0:4:1:1:1:1"},
+		{"6b", "1:2:0:4:5:1:1:1"},
+		{"6c", "1:2:0:4:5:0:0:0"},
+		{nil, "239.0.0.0"},
+		{nil, "4.1.2.2"},
+	}
+
+	for _, tt := range tests {
+		assert.Equal(t, tt.Result, tree.MostSpecificContains(net.ParseIP(tt.IP)))
+	}
+
+	tree = NewTree6()
+	tree.AddCIDR(Parse("1.1.1.1/0"), "cool")
+	tree.AddCIDR(Parse("::/0"), "cool6")
+	assert.Equal(t, "cool", tree.MostSpecificContains(net.ParseIP("0.0.0.0")))
+	assert.Equal(t, "cool", tree.MostSpecificContains(net.ParseIP("255.255.255.255")))
+	assert.Equal(t, "cool6", tree.MostSpecificContains(net.ParseIP("::")))
+	assert.Equal(t, "cool6", tree.MostSpecificContains(net.ParseIP("1:2:3:4:5:6:7:8")))
+}
+
+func TestCIDR6Tree_MostSpecificContainsIpV6(t *testing.T) {
+	tree := NewTree6()
+	tree.AddCIDR(Parse("1:2:0:4:5:0:0:0/64"), "6a")
+	tree.AddCIDR(Parse("1:2:0:4:5:0:0:0/80"), "6b")
+	tree.AddCIDR(Parse("1:2:0:4:5:0:0:0/96"), "6c")
+
+	tests := []struct {
+		Result interface{}
+		IP     string
+	}{
+		{"6a", "1:2:0:4:1:1:1:1"},
+		{"6b", "1:2:0:4:5:1:1:1"},
+		{"6c", "1:2:0:4:5:0:0:0"},
+	}
+
+	for _, tt := range tests {
+		ip := net.ParseIP(tt.IP)
+		hi := binary.BigEndian.Uint64(ip[:8])
+		lo := binary.BigEndian.Uint64(ip[8:])
+
+		assert.Equal(t, tt.Result, tree.MostSpecificContainsIpV6(hi, lo))
+	}
+}

cidr_radix_test.go

@@ -1,157 +0,0 @@
-package nebula
-
-import (
-	"net"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestCIDRTree_Contains(t *testing.T) {
-	tree := NewCIDRTree()
-	tree.AddCIDR(getCIDR("1.0.0.0/8"), "1")
-	tree.AddCIDR(getCIDR("2.1.0.0/16"), "2")
-	tree.AddCIDR(getCIDR("3.1.1.0/24"), "3")
-	tree.AddCIDR(getCIDR("4.1.1.0/24"), "4a")
-	tree.AddCIDR(getCIDR("4.1.1.1/32"), "4b")
-	tree.AddCIDR(getCIDR("4.1.2.1/32"), "4c")
-	tree.AddCIDR(getCIDR("254.0.0.0/4"), "5")
-
-	tests := []struct {
-		Result interface{}
-		IP     string
-	}{
-		{"1", "1.0.0.0"},
-		{"1", "1.255.255.255"},
-		{"2", "2.1.0.0"},
-		{"2", "2.1.255.255"},
-		{"3", "3.1.1.0"},
-		{"3", "3.1.1.255"},
-		{"4a", "4.1.1.255"},
-		{"4a", "4.1.1.1"},
-		{"5", "240.0.0.0"},
-		{"5", "255.255.255.255"},
-		{nil, "239.0.0.0"},
-		{nil, "4.1.2.2"},
-	}
-
-	for _, tt := range tests {
-		assert.Equal(t, tt.Result, tree.Contains(ip2int(net.ParseIP(tt.IP))))
-	}
-
-	tree = NewCIDRTree()
-	tree.AddCIDR(getCIDR("1.1.1.1/0"), "cool")
-	assert.Equal(t, "cool", tree.Contains(ip2int(net.ParseIP("0.0.0.0"))))
-	assert.Equal(t, "cool", tree.Contains(ip2int(net.ParseIP("255.255.255.255"))))
-}
-
-func TestCIDRTree_MostSpecificContains(t *testing.T) {
-	tree := NewCIDRTree()
-	tree.AddCIDR(getCIDR("1.0.0.0/8"), "1")
-	tree.AddCIDR(getCIDR("2.1.0.0/16"), "2")
-	tree.AddCIDR(getCIDR("3.1.1.0/24"), "3")
-	tree.AddCIDR(getCIDR("4.1.1.0/24"), "4a")
-	tree.AddCIDR(getCIDR("4.1.1.0/30"), "4b")
-	tree.AddCIDR(getCIDR("4.1.1.1/32"), "4c")
-	tree.AddCIDR(getCIDR("254.0.0.0/4"), "5")
-
-	tests := []struct {
-		Result interface{}
-		IP     string
-	}{
-		{"1", "1.0.0.0"},
-		{"1", "1.255.255.255"},
-		{"2", "2.1.0.0"},
-		{"2", "2.1.255.255"},
-		{"3", "3.1.1.0"},
-		{"3", "3.1.1.255"},
-		{"4a", "4.1.1.255"},
-		{"4b", "4.1.1.2"},
-		{"4c", "4.1.1.1"},
-		{"5", "240.0.0.0"},
-		{"5", "255.255.255.255"},
-		{nil, "239.0.0.0"},
-		{nil, "4.1.2.2"},
-	}
-
-	for _, tt := range tests {
-		assert.Equal(t, tt.Result, tree.MostSpecificContains(ip2int(net.ParseIP(tt.IP))))
-	}
-
-	tree = NewCIDRTree()
-	tree.AddCIDR(getCIDR("1.1.1.1/0"), "cool")
-	assert.Equal(t, "cool", tree.MostSpecificContains(ip2int(net.ParseIP("0.0.0.0"))))
-	assert.Equal(t, "cool", tree.MostSpecificContains(ip2int(net.ParseIP("255.255.255.255"))))
-}
-
-func TestCIDRTree_Match(t *testing.T) {
-	tree := NewCIDRTree()
-	tree.AddCIDR(getCIDR("4.1.1.0/32"), "1a")
-	tree.AddCIDR(getCIDR("4.1.1.1/32"), "1b")
-
-	tests := []struct {
-		Result interface{}
-		IP     string
-	}{
-		{"1a", "4.1.1.0"},
-		{"1b", "4.1.1.1"},
-	}
-
-	for _, tt := range tests {
-		assert.Equal(t, tt.Result, tree.Match(ip2int(net.ParseIP(tt.IP))))
-	}
-
-	tree = NewCIDRTree()
-	tree.AddCIDR(getCIDR("1.1.1.1/0"), "cool")
-	assert.Equal(t, "cool", tree.Contains(ip2int(net.ParseIP("0.0.0.0"))))
-	assert.Equal(t, "cool", tree.Contains(ip2int(net.ParseIP("255.255.255.255"))))
-}
-
-func BenchmarkCIDRTree_Contains(b *testing.B) {
-	tree := NewCIDRTree()
-	tree.AddCIDR(getCIDR("1.1.0.0/16"), "1")
-	tree.AddCIDR(getCIDR("1.2.1.1/32"), "1")
-	tree.AddCIDR(getCIDR("192.2.1.1/32"), "1")
-	tree.AddCIDR(getCIDR("172.2.1.1/32"), "1")
-
-	ip := ip2int(net.ParseIP("1.2.1.1"))
-	b.Run("found", func(b *testing.B) {
-		for i := 0; i < b.N; i++ {
-			tree.Contains(ip)
-		}
-	})
-
-	ip = ip2int(net.ParseIP("1.2.1.255"))
-	b.Run("not found", func(b *testing.B) {
-		for i := 0; i < b.N; i++ {
-			tree.Contains(ip)
-		}
-	})
-}
-
-func BenchmarkCIDRTree_Match(b *testing.B) {
-	tree := NewCIDRTree()
-	tree.AddCIDR(getCIDR("1.1.0.0/16"), "1")
-	tree.AddCIDR(getCIDR("1.2.1.1/32"), "1")
-	tree.AddCIDR(getCIDR("192.2.1.1/32"), "1")
-	tree.AddCIDR(getCIDR("172.2.1.1/32"), "1")
-
-	ip := ip2int(net.ParseIP("1.2.1.1"))
-	b.Run("found", func(b *testing.B) {
-		for i := 0; i < b.N; i++ {
-			tree.Match(ip)
-		}
-	})
-
-	ip = ip2int(net.ParseIP("1.2.1.255"))
-	b.Run("not found", func(b *testing.B) {
-		for i := 0; i < b.N; i++ {
-			tree.Match(ip)
-		}
-	})
-}
-
-func getCIDR(s string) *net.IPNet {
-	_, c, _ := net.ParseCIDR(s)
-	return c
-}

cmd/nebula-cert/ca.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/skip2/go-qrcode"
 	"github.com/slackhq/nebula/cert"
 	"golang.org/x/crypto/ed25519"
 )
@@ -21,6 +22,7 @@ type caFlags struct {
 	duration    *time.Duration
 	outKeyPath  *string
 	outCertPath *string
+	outQRPath   *string
 	groups      *string
 	ips         *string
 	subnets     *string
@@ -33,9 +35,10 @@ func newCaFlags() *caFlags {
 	cf.duration = cf.set.Duration("duration", time.Duration(time.Hour*8760), "Optional: amount of time the certificate should be valid for. Valid time units are seconds: \"s\", minutes: \"m\", hours: \"h\"")
 	cf.outKeyPath = cf.set.String("out-key", "ca.key", "Optional: path to write the private key to")
 	cf.outCertPath = cf.set.String("out-crt", "ca.crt", "Optional: path to write the certificate to")
+	cf.outQRPath = cf.set.String("out-qr", "", "Optional: output a qr code image (png) of the certificate")
 	cf.groups = cf.set.String("groups", "", "Optional: comma separated list of groups. This will limit which groups subordinate certs can use")
-	cf.ips = cf.set.String("ips", "", "Optional: comma separated list of ip and network in CIDR notation. This will limit which ip addresses and networks subordinate certs can use")
+	cf.ips = cf.set.String("ips", "", "Optional: comma separated list of ipv4 address and network in CIDR notation. This will limit which ipv4 addresses and networks subordinate certs can use for ip addresses")
-	cf.subnets = cf.set.String("subnets", "", "Optional: comma separated list of ip and network in CIDR notation. This will limit which subnet addresses and networks subordinate certs can use")
+	cf.subnets = cf.set.String("subnets", "", "Optional: comma separated list of ipv4 address and network in CIDR notation. This will limit which ipv4 addresses and networks subordinate certs can use in subnets")
 	return &cf
 }
 
@@ -79,6 +82,9 @@ func ca(args []string, out io.Writer, errOut io.Writer) error {
 				if err != nil {
 					return newHelpErrorf("invalid ip definition: %s", err)
 				}
+				if ip.To4() == nil {
+					return newHelpErrorf("invalid ip definition: can only be ipv4, have %s", rs)
+				}
 
 				ipNet.IP = ip
 				ips = append(ips, ipNet)
@@ -95,6 +101,9 @@ func ca(args []string, out io.Writer, errOut io.Writer) error {
 				if err != nil {
 					return newHelpErrorf("invalid subnet definition: %s", err)
 				}
+				if s.IP.To4() == nil {
+					return newHelpErrorf("invalid subnet definition: can only be ipv4, have %s", rs)
+				}
 				subnets = append(subnets, s)
 			}
 		}
@@ -146,6 +155,18 @@ func ca(args []string, out io.Writer, errOut io.Writer) error {
 		return fmt.Errorf("error while writing out-crt: %s", err)
 	}
 
+	if *cf.outQRPath != "" {
+		b, err = qrcode.Encode(string(b), qrcode.Medium, -5)
+		if err != nil {
+			return fmt.Errorf("error while generating qr code: %s", err)
+		}
+
+		err = ioutil.WriteFile(*cf.outQRPath, b, 0600)
+		if err != nil {
+			return fmt.Errorf("error while writing out-qr: %s", err)
+		}
+	}
+
 	return nil
 }
 

cmd/nebula-cert/ca_test.go

@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows
 
 package main
@@ -30,15 +31,17 @@ func Test_caHelp(t *testing.T) {
 			"  -groups string\n"+
 			"    \tOptional: comma separated list of groups. This will limit which groups subordinate certs can use\n"+
 			"  -ips string\n"+
-			"    \tOptional: comma separated list of ip and network in CIDR notation. This will limit which ip addresses and networks subordinate certs can use\n"+
+			"    \tOptional: comma separated list of ipv4 address and network in CIDR notation. This will limit which ipv4 addresses and networks subordinate certs can use for ip addresses\n"+
 			"  -name string\n"+
 			"    \tRequired: name of the certificate authority\n"+
 			"  -out-crt string\n"+
 			"    \tOptional: path to write the certificate to (default \"ca.crt\")\n"+
 			"  -out-key string\n"+
 			"    \tOptional: path to write the private key to (default \"ca.key\")\n"+
+			"  -out-qr string\n"+
+			"    \tOptional: output a qr code image (png) of the certificate\n"+
 			"  -subnets string\n"+
-			"    \tOptional: comma separated list of ip and network in CIDR notation. This will limit which subnet addresses and networks subordinate certs can use\n",
+			"    \tOptional: comma separated list of ipv4 address and network in CIDR notation. This will limit which ipv4 addresses and networks subordinate certs can use in subnets\n",
 		ob.String(),
 	)
 }
@@ -52,6 +55,16 @@ func Test_ca(t *testing.T) {
 	assert.Equal(t, "", ob.String())
 	assert.Equal(t, "", eb.String())
 
+	// ipv4 only ips
+	assertHelpError(t, ca([]string{"-name", "ipv6", "-ips", "100::100/100"}, ob, eb), "invalid ip definition: can only be ipv4, have 100::100/100")
+	assert.Equal(t, "", ob.String())
+	assert.Equal(t, "", eb.String())
+
+	// ipv4 only subnets
+	assertHelpError(t, ca([]string{"-name", "ipv6", "-subnets", "100::100/100"}, ob, eb), "invalid subnet definition: can only be ipv4, have 100::100/100")
+	assert.Equal(t, "", ob.String())
+	assert.Equal(t, "", eb.String())
+
 	// failed key write
 	ob.Reset()
 	eb.Reset()

cmd/nebula-cert/main_test.go

@@ -3,10 +3,11 @@ package main
 import (
 	"bytes"
 	"errors"
-	"github.com/stretchr/testify/assert"
 	"io"
 	"os"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 //TODO: all flag parsing continueOnError will print to stderr on its own currently

cmd/nebula-cert/print.go

@@ -4,16 +4,19 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
-	"github.com/slackhq/nebula/cert"
 	"io"
 	"io/ioutil"
 	"os"
 	"strings"
+
+	"github.com/skip2/go-qrcode"
+	"github.com/slackhq/nebula/cert"
 )
 
 type printFlags struct {
 	set       *flag.FlagSet
 	json      *bool
+	outQRPath *string
 	path      *string
 }
 
@@ -21,6 +24,7 @@ func newPrintFlags() *printFlags {
 	pf := printFlags{set: flag.NewFlagSet("print", flag.ContinueOnError)}
 	pf.set.Usage = func() {}
 	pf.json = pf.set.Bool("json", false, "Optional: outputs certificates in json format")
+	pf.outQRPath = pf.set.String("out-qr", "", "Optional: output a qr code image (png) of the certificate")
 	pf.path = pf.set.String("path", "", "Required: path to the certificate")
 
 	return &pf
@@ -43,6 +47,8 @@ func printCert(args []string, out io.Writer, errOut io.Writer) error {
 	}
 
 	var c *cert.NebulaCertificate
+	var qrBytes []byte
+	part := 0
 
 	for {
 		c, rawCert, err = cert.UnmarshalNebulaCertificateFromPEM(rawCert)
@@ -60,9 +66,31 @@ func printCert(args []string, out io.Writer, errOut io.Writer) error {
 			out.Write([]byte("\n"))
 		}
 
+		if *pf.outQRPath != "" {
+			b, err := c.MarshalToPEM()
+			if err != nil {
+				return fmt.Errorf("error while marshalling cert to PEM: %s", err)
+			}
+			qrBytes = append(qrBytes, b...)
+		}
+
 		if rawCert == nil || len(rawCert) == 0 || strings.TrimSpace(string(rawCert)) == "" {
 			break
 		}
+
+		part++
+	}
+
+	if *pf.outQRPath != "" {
+		b, err := qrcode.Encode(string(qrBytes), qrcode.Medium, -5)
+		if err != nil {
+			return fmt.Errorf("error while generating qr code: %s", err)
+		}
+
+		err = ioutil.WriteFile(*pf.outQRPath, b, 0600)
+		if err != nil {
+			return fmt.Errorf("error while writing out-qr: %s", err)
+		}
 	}
 
 	return nil

cmd/nebula-cert/print_test.go

@@ -2,12 +2,13 @@ package main
 
 import (
 	"bytes"
-	"github.com/slackhq/nebula/cert"
-	"github.com/stretchr/testify/assert"
 	"io/ioutil"
 	"os"
 	"testing"
 	"time"
+
+	"github.com/slackhq/nebula/cert"
+	"github.com/stretchr/testify/assert"
 )
 
 func Test_printSummary(t *testing.T) {
@@ -22,6 +23,8 @@ func Test_printHelp(t *testing.T) {
 		"Usage of "+os.Args[0]+" print <flags>: prints details about a certificate\n"+
 			"  -json\n"+
 			"    \tOptional: outputs certificates in json format\n"+
+			"  -out-qr string\n"+
+			"    \tOptional: output a qr code image (png) of the certificate\n"+
 			"  -path string\n"+
 			"    \tRequired: path to the certificate\n",
 		ob.String(),

cmd/nebula-cert/sign.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/skip2/go-qrcode"
 	"github.com/slackhq/nebula/cert"
 	"golang.org/x/crypto/curve25519"
 )
@@ -25,6 +26,7 @@ type signFlags struct {
 	inPubPath   *string
 	outKeyPath  *string
 	outCertPath *string
+	outQRPath   *string
 	groups      *string
 	subnets     *string
 }
@@ -35,13 +37,14 @@ func newSignFlags() *signFlags {
 	sf.caKeyPath = sf.set.String("ca-key", "ca.key", "Optional: path to the signing CA key")
 	sf.caCertPath = sf.set.String("ca-crt", "ca.crt", "Optional: path to the signing CA cert")
 	sf.name = sf.set.String("name", "", "Required: name of the cert, usually a hostname")
-	sf.ip = sf.set.String("ip", "", "Required: ip and network in CIDR notation to assign the cert")
+	sf.ip = sf.set.String("ip", "", "Required: ipv4 address and network in CIDR notation to assign the cert")
 	sf.duration = sf.set.Duration("duration", 0, "Optional: how long the cert should be valid for. The default is 1 second before the signing cert expires. Valid time units are seconds: \"s\", minutes: \"m\", hours: \"h\"")
 	sf.inPubPath = sf.set.String("in-pub", "", "Optional (if out-key not set): path to read a previously generated public key")
 	sf.outKeyPath = sf.set.String("out-key", "", "Optional (if in-pub not set): path to write the private key to")
 	sf.outCertPath = sf.set.String("out-crt", "", "Optional: path to write the certificate to")
+	sf.outQRPath = sf.set.String("out-qr", "", "Optional: output a qr code image (png) of the certificate")
 	sf.groups = sf.set.String("groups", "", "Optional: comma separated list of groups")
-	sf.subnets = sf.set.String("subnets", "", "Optional: comma seperated list of subnet this cert can serve for")
+	sf.subnets = sf.set.String("subnets", "", "Optional: comma separated list of ipv4 address and network in CIDR notation. Subnets this cert can serve for")
 	return &sf
 
 }
@@ -89,6 +92,10 @@ func signCert(args []string, out io.Writer, errOut io.Writer) error {
 		return fmt.Errorf("error while parsing ca-crt: %s", err)
 	}
 
+	if err := caCert.VerifyPrivateKey(caKey); err != nil {
+		return fmt.Errorf("refusing to sign, root certificate does not match private key")
+	}
+
 	issuer, err := caCert.Sha256Sum()
 	if err != nil {
 		return fmt.Errorf("error while getting -ca-crt fingerprint: %s", err)
@@ -107,6 +114,9 @@ func signCert(args []string, out io.Writer, errOut io.Writer) error {
 	if err != nil {
 		return newHelpErrorf("invalid ip definition: %s", err)
 	}
+	if ip.To4() == nil {
+		return newHelpErrorf("invalid ip definition: can only be ipv4, have %s", *sf.ip)
+	}
 	ipNet.IP = ip
 
 	groups := []string{}
@@ -128,6 +138,9 @@ func signCert(args []string, out io.Writer, errOut io.Writer) error {
 				if err != nil {
 					return newHelpErrorf("invalid subnet definition: %s", err)
 				}
+				if s.IP.To4() == nil {
+					return newHelpErrorf("invalid subnet definition: can only be ipv4, have %s", rs)
+				}
 				subnets = append(subnets, s)
 			}
 		}
@@ -203,16 +216,33 @@ func signCert(args []string, out io.Writer, errOut io.Writer) error {
 		return fmt.Errorf("error while writing out-crt: %s", err)
 	}
 
+	if *sf.outQRPath != "" {
+		b, err = qrcode.Encode(string(b), qrcode.Medium, -5)
+		if err != nil {
+			return fmt.Errorf("error while generating qr code: %s", err)
+		}
+
+		err = ioutil.WriteFile(*sf.outQRPath, b, 0600)
+		if err != nil {
+			return fmt.Errorf("error while writing out-qr: %s", err)
+		}
+	}
+
 	return nil
 }
 
 func x25519Keypair() ([]byte, []byte) {
-	var pubkey, privkey [32]byte
+	privkey := make([]byte, 32)
-	if _, err := io.ReadFull(rand.Reader, privkey[:]); err != nil {
+	if _, err := io.ReadFull(rand.Reader, privkey); err != nil {
 		panic(err)
 	}
-	curve25519.ScalarBaseMult(&pubkey, &privkey)
+
-	return pubkey[:], privkey[:]
+	pubkey, err := curve25519.X25519(privkey, curve25519.Basepoint)
+	if err != nil {
+		panic(err)
+	}
+
+	return pubkey, privkey
 }
 
 func signSummary() string {

cmd/nebula-cert/sign_test.go

@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows
 
 package main
@@ -38,15 +39,17 @@ func Test_signHelp(t *testing.T) {
 			"  -in-pub string\n"+
 			"    \tOptional (if out-key not set): path to read a previously generated public key\n"+
 			"  -ip string\n"+
-			"    \tRequired: ip and network in CIDR notation to assign the cert\n"+
+			"    \tRequired: ipv4 address and network in CIDR notation to assign the cert\n"+
 			"  -name string\n"+
 			"    \tRequired: name of the cert, usually a hostname\n"+
 			"  -out-crt string\n"+
 			"    \tOptional: path to write the certificate to\n"+
 			"  -out-key string\n"+
 			"    \tOptional (if in-pub not set): path to write the private key to\n"+
+			"  -out-qr string\n"+
+			"    \tOptional: output a qr code image (png) of the certificate\n"+
 			"  -subnets string\n"+
-			"    \tOptional: comma seperated list of subnet this cert can serve for\n",
+			"    \tOptional: comma separated list of ipv4 address and network in CIDR notation. Subnets this cert can serve for\n",
 		ob.String(),
 	)
 }
@@ -56,7 +59,6 @@ func Test_signCert(t *testing.T) {
 	eb := &bytes.Buffer{}
 
 	// required args
-
 	assertHelpError(t, signCert([]string{"-ca-crt", "./nope", "-ca-key", "./nope", "-ip", "1.1.1.1/24", "-out-key", "nope", "-out-crt", "nope"}, ob, eb), "-name is required")
 	assert.Empty(t, ob.String())
 	assert.Empty(t, eb.String())
@@ -157,6 +159,13 @@ func Test_signCert(t *testing.T) {
 	assert.Empty(t, ob.String())
 	assert.Empty(t, eb.String())
 
+	ob.Reset()
+	eb.Reset()
+	args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "100::100/100", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m"}
+	assertHelpError(t, signCert(args, ob, eb), "invalid ip definition: can only be ipv4, have 100::100/100")
+	assert.Empty(t, ob.String())
+	assert.Empty(t, eb.String())
+
 	// bad subnet cidr
 	ob.Reset()
 	eb.Reset()
@@ -165,6 +174,27 @@ func Test_signCert(t *testing.T) {
 	assert.Empty(t, ob.String())
 	assert.Empty(t, eb.String())
 
+	ob.Reset()
+	eb.Reset()
+	args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m", "-subnets", "100::100/100"}
+	assertHelpError(t, signCert(args, ob, eb), "invalid subnet definition: can only be ipv4, have 100::100/100")
+	assert.Empty(t, ob.String())
+	assert.Empty(t, eb.String())
+
+	// mismatched ca key
+	_, caPriv2, _ := ed25519.GenerateKey(rand.Reader)
+	caKeyF2, err := ioutil.TempFile("", "sign-cert-2.key")
+	assert.Nil(t, err)
+	defer os.Remove(caKeyF2.Name())
+	caKeyF2.Write(cert.MarshalEd25519PrivateKey(caPriv2))
+
+	ob.Reset()
+	eb.Reset()
+	args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF2.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m", "-subnets", "a"}
+	assert.EqualError(t, signCert(args, ob, eb), "refusing to sign, root certificate does not match private key")
+	assert.Empty(t, ob.String())
+	assert.Empty(t, eb.String())
+
 	// failed key write
 	ob.Reset()
 	eb.Reset()
@@ -286,5 +316,4 @@ func Test_signCert(t *testing.T) {
 	assert.EqualError(t, signCert(args, ob, eb), "refusing to overwrite existing cert: "+crtF.Name())
 	assert.Empty(t, ob.String())
 	assert.Empty(t, eb.String())
-
 }

cmd/nebula-cert/verify.go

@@ -3,12 +3,13 @@ package main
 import (
 	"flag"
 	"fmt"
-	"github.com/slackhq/nebula/cert"
 	"io"
 	"io/ioutil"
 	"os"
 	"strings"
 	"time"
+
+	"github.com/slackhq/nebula/cert"
 )
 
 type verifyFlags struct {

cmd/nebula-cert/verify_test.go

@@ -3,13 +3,14 @@ package main
 import (
 	"bytes"
 	"crypto/rand"
-	"github.com/slackhq/nebula/cert"
-	"github.com/stretchr/testify/assert"
-	"golang.org/x/crypto/ed25519"
 	"io/ioutil"
 	"os"
 	"testing"
 	"time"
+
+	"github.com/slackhq/nebula/cert"
+	"github.com/stretchr/testify/assert"
+	"golang.org/x/crypto/ed25519"
 )
 
 func Test_verifySummary(t *testing.T) {
@@ -71,7 +72,7 @@ func Test_verify(t *testing.T) {
 		Details: cert.NebulaCertificateDetails{
 			Name:      "test-ca",
 			NotBefore: time.Now().Add(time.Hour * -1),
-			NotAfter:  time.Now().Add(time.Hour),
+			NotAfter:  time.Now().Add(time.Hour * 2),
 			PublicKey: caPub,
 			IsCA:      true,
 		},

cmd/nebula-service/logs_generic.go

@@ -0,0 +1,10 @@
+//go:build !windows
+// +build !windows
+
+package main
+
+import "github.com/sirupsen/logrus"
+
+func HookLogger(l *logrus.Logger) {
+	// Do nothing, let the logs flow to stdout/stderr
+}

cmd/nebula-service/logs_windows.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/kardianos/service"
+	"github.com/sirupsen/logrus"
+)
+
+// HookLogger routes the logrus logs through the service logger so that they end up in the Windows Event Viewer
+// logrus output will be discarded
+func HookLogger(l *logrus.Logger) {
+	l.AddHook(newLogHook(logger))
+	l.SetOutput(ioutil.Discard)
+}
+
+type logHook struct {
+	sl service.Logger
+}
+
+func newLogHook(sl service.Logger) *logHook {
+	return &logHook{sl: sl}
+}
+
+func (h *logHook) Fire(entry *logrus.Entry) error {
+	line, err := entry.String()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to read entry, %v", err)
+		return err
+	}
+
+	switch entry.Level {
+	case logrus.PanicLevel:
+		return h.sl.Error(line)
+	case logrus.FatalLevel:
+		return h.sl.Error(line)
+	case logrus.ErrorLevel:
+		return h.sl.Error(line)
+	case logrus.WarnLevel:
+		return h.sl.Warning(line)
+	case logrus.InfoLevel:
+		return h.sl.Info(line)
+	case logrus.DebugLevel:
+		return h.sl.Info(line)
+	default:
+		return nil
+	}
+}
+
+func (h *logHook) Levels() []logrus.Level {
+	return logrus.AllLevels
+}

cmd/nebula-service/main.go

@@ -5,7 +5,10 @@ import (
 	"fmt"
 	"os"
 
+	"github.com/sirupsen/logrus"
 	"github.com/slackhq/nebula"
+	"github.com/slackhq/nebula/config"
+	"github.com/slackhq/nebula/util"
 )
 
 // A version string that can be set with
@@ -45,5 +48,31 @@ func main() {
 		os.Exit(1)
 	}
 
-	nebula.Main(*configPath, *configTest, Build)
+	l := logrus.New()
+	l.Out = os.Stdout
+
+	c := config.NewC(l)
+	err := c.Load(*configPath)
+	if err != nil {
+		fmt.Printf("failed to load config: %s", err)
+		os.Exit(1)
+	}
+
+	ctrl, err := nebula.Main(c, *configTest, Build, l, nil)
+
+	switch v := err.(type) {
+	case util.ContextualError:
+		v.Log(l)
+		os.Exit(1)
+	case error:
+		l.WithError(err).Error("Failed to start")
+		os.Exit(1)
+	}
+
+	if !*configTest {
+		ctrl.Start()
+		ctrl.ShutdownBlock()
+	}
+
+	os.Exit(0)
 }

cmd/nebula-service/service.go

@@ -1,44 +1,55 @@
 package main
 
 import (
+	"fmt"
 	"log"
 	"os"
 	"path/filepath"
 
 	"github.com/kardianos/service"
+	"github.com/sirupsen/logrus"
 	"github.com/slackhq/nebula"
+	"github.com/slackhq/nebula/config"
 )
 
 var logger service.Logger
 
 type program struct {
-	exit       chan struct{}
 	configPath *string
 	configTest *bool
 	build      string
+	control    *nebula.Control
 }
 
 func (p *program) Start(s service.Service) error {
-	logger.Info("Nebula service starting.")
-	p.exit = make(chan struct{})
 	// Start should not block.
-	go p.run()
+	logger.Info("Nebula service starting.")
-	return nil
-}
 
-func (p *program) run() error {
+	l := logrus.New()
-	nebula.Main(*p.configPath, *p.configTest, Build)
+	HookLogger(l)
+
+	c := config.NewC(l)
+	err := c.Load(*p.configPath)
+	if err != nil {
+		return fmt.Errorf("failed to load config: %s", err)
+	}
+
+	p.control, err = nebula.Main(c, *p.configTest, Build, l, nil)
+	if err != nil {
+		return err
+	}
+
+	p.control.Start()
 	return nil
 }
 
 func (p *program) Stop(s service.Service) error {
 	logger.Info("Nebula service stopping.")
-	close(p.exit)
+	p.control.Stop()
 	return nil
 }
 
 func doService(configPath *string, configTest *bool, build string, serviceFlag *string) {
-
 	if *configPath == "" {
 		ex, err := os.Executable()
 		if err != nil {
@@ -60,6 +71,10 @@ func doService(configPath *string, configTest *bool, build string, serviceFlag *
 		build:      build,
 	}
 
+	// Here are what the different loggers are doing:
+	// - `log` is the standard go log utility, meant to be used while the process is still attached to stdout/stderr
+	// - `logger` is the service log utility that may be attached to a special place depending on OS (Windows will have it attached to the event log)
+	// - above, in `Run` we create a `logrus.Logger` which is what nebula expects to use
 	s, err := service.New(prg, svcConfig)
 	if err != nil {
 		log.Fatal(err)
@@ -75,6 +90,7 @@ func doService(configPath *string, configTest *bool, build string, serviceFlag *
 		for {
 			err := <-errs
 			if err != nil {
+				// Route any errors from the system logger to stdout as a best effort to notice issues there
 				log.Print(err)
 			}
 		}
@@ -84,6 +100,7 @@ func doService(configPath *string, configTest *bool, build string, serviceFlag *
 	case "run":
 		err = s.Run()
 		if err != nil {
+			// Route any errors to the system logger
 			logger.Error(err)
 		}
 	default:

cmd/nebula/main.go

@@ -5,7 +5,10 @@ import (
 	"fmt"
 	"os"
 
+	"github.com/sirupsen/logrus"
 	"github.com/slackhq/nebula"
+	"github.com/slackhq/nebula/config"
+	"github.com/slackhq/nebula/util"
 )
 
 // A version string that can be set with
@@ -39,5 +42,31 @@ func main() {
 		os.Exit(1)
 	}
 
-	nebula.Main(*configPath, *configTest, Build)
+	l := logrus.New()
+	l.Out = os.Stdout
+
+	c := config.NewC(l)
+	err := c.Load(*configPath)
+	if err != nil {
+		fmt.Printf("failed to load config: %s", err)
+		os.Exit(1)
+	}
+
+	ctrl, err := nebula.Main(c, *configTest, Build, l, nil)
+
+	switch v := err.(type) {
+	case util.ContextualError:
+		v.Log(l)
+		os.Exit(1)
+	case error:
+		l.WithError(err).Error("Failed to start")
+		os.Exit(1)
+	}
+
+	if !*configTest {
+		ctrl.Start()
+		ctrl.ShutdownBlock()
+	}
+
+	os.Exit(0)
 }

config/config.go

@@ -1,10 +1,9 @@
-package nebula
+package config
 
 import (
+	"context"
+	"errors"
 	"fmt"
-	"github.com/imdario/mergo"
-	"github.com/sirupsen/logrus"
-	"gopkg.in/yaml.v2"
 	"io/ioutil"
 	"os"
 	"os/signal"
@@ -12,30 +11,38 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"sync"
 	"syscall"
 	"time"
+
+	"github.com/imdario/mergo"
+	"github.com/sirupsen/logrus"
+	"gopkg.in/yaml.v2"
 )
 
-type Config struct {
+type C struct {
 	path        string
 	files       []string
 	Settings    map[interface{}]interface{}
 	oldSettings map[interface{}]interface{}
-	callbacks   []func(*Config)
+	callbacks   []func(*C)
+	l           *logrus.Logger
+	reloadLock  sync.Mutex
 }
 
-func NewConfig() *Config {
+func NewC(l *logrus.Logger) *C {
-	return &Config{
+	return &C{
 		Settings: make(map[interface{}]interface{}),
+		l:        l,
 	}
 }
 
 // Load will find all yaml files within path and load them in lexical order
-func (c *Config) Load(path string) error {
+func (c *C) Load(path string) error {
 	c.path = path
 	c.files = make([]string, 0)
 
-	err := c.resolve(path)
+	err := c.resolve(path, true)
 	if err != nil {
 		return err
 	}
@@ -54,20 +61,32 @@ func (c *Config) Load(path string) error {
 	return nil
 }
 
+func (c *C) LoadString(raw string) error {
+	if raw == "" {
+		return errors.New("Empty configuration")
+	}
+	return c.parseRaw([]byte(raw))
+}
+
 // RegisterReloadCallback stores a function to be called when a config reload is triggered. The functions registered
 // here should decide if they need to make a change to the current process before making the change. HasChanged can be
 // used to help decide if a change is necessary.
 // These functions should return quickly or spawn their own go routine if they will take a while
-func (c *Config) RegisterReloadCallback(f func(*Config)) {
+func (c *C) RegisterReloadCallback(f func(*C)) {
 	c.callbacks = append(c.callbacks, f)
 }
 
+// InitialLoad returns true if this is the first load of the config, and ReloadConfig has not been called yet.
+func (c *C) InitialLoad() bool {
+	return c.oldSettings == nil
+}
+
 // HasChanged checks if the underlying structure of the provided key has changed after a config reload. The value of
 // k in both the old and new settings will be serialized, the result of the string comparison is returned.
 // If k is an empty string the entire config is tested.
 // It's important to note that this is very rudimentary and susceptible to configuration ordering issues indicating
 // there is change when there actually wasn't any.
-func (c *Config) HasChanged(k string) bool {
+func (c *C) HasChanged(k string) bool {
 	if c.oldSettings == nil {
 		return false
 	}
@@ -88,12 +107,12 @@ func (c *Config) HasChanged(k string) bool {
 
 	newVals, err := yaml.Marshal(nv)
 	if err != nil {
-		l.WithField("config_path", k).WithError(err).Error("Error while marshaling new config")
+		c.l.WithField("config_path", k).WithError(err).Error("Error while marshaling new config")
 	}
 
 	oldVals, err := yaml.Marshal(ov)
 	if err != nil {
-		l.WithField("config_path", k).WithError(err).Error("Error while marshaling old config")
+		c.l.WithField("config_path", k).WithError(err).Error("Error while marshaling old config")
 	}
 
 	return string(newVals) != string(oldVals)
@@ -101,19 +120,29 @@ func (c *Config) HasChanged(k string) bool {
 
 // CatchHUP will listen for the HUP signal in a go routine and reload all configs found in the
 // original path provided to Load. The old settings are shallow copied for change detection after the reload.
-func (c *Config) CatchHUP() {
+func (c *C) CatchHUP(ctx context.Context) {
 	ch := make(chan os.Signal, 1)
 	signal.Notify(ch, syscall.SIGHUP)
 
 	go func() {
-		for range ch {
+		for {
-			l.Info("Caught HUP, reloading config")
+			select {
+			case <-ctx.Done():
+				signal.Stop(ch)
+				close(ch)
+				return
+			case <-ch:
+				c.l.Info("Caught HUP, reloading config")
 				c.ReloadConfig()
 			}
+		}
 	}()
 }
 
-func (c *Config) ReloadConfig() {
+func (c *C) ReloadConfig() {
+	c.reloadLock.Lock()
+	defer c.reloadLock.Unlock()
+
 	c.oldSettings = make(map[interface{}]interface{})
 	for k, v := range c.Settings {
 		c.oldSettings[k] = v
@@ -121,7 +150,7 @@ func (c *Config) ReloadConfig() {
 
 	err := c.Load(c.path)
 	if err != nil {
-		l.WithField("config_path", c.path).WithError(err).Error("Error occurred while reloading config")
+		c.l.WithField("config_path", c.path).WithError(err).Error("Error occurred while reloading config")
 		return
 	}
 
@@ -130,8 +159,29 @@ func (c *Config) ReloadConfig() {
 	}
 }
 
+func (c *C) ReloadConfigString(raw string) error {
+	c.reloadLock.Lock()
+	defer c.reloadLock.Unlock()
+
+	c.oldSettings = make(map[interface{}]interface{})
+	for k, v := range c.Settings {
+		c.oldSettings[k] = v
+	}
+
+	err := c.LoadString(raw)
+	if err != nil {
+		return err
+	}
+
+	for _, v := range c.callbacks {
+		v(c)
+	}
+
+	return nil
+}
+
 // GetString will get the string for k or return the default d if not found or invalid
-func (c *Config) GetString(k, d string) string {
+func (c *C) GetString(k, d string) string {
 	r := c.Get(k)
 	if r == nil {
 		return d
@@ -141,7 +191,7 @@ func (c *Config) GetString(k, d string) string {
 }
 
 // GetStringSlice will get the slice of strings for k or return the default d if not found or invalid
-func (c *Config) GetStringSlice(k string, d []string) []string {
+func (c *C) GetStringSlice(k string, d []string) []string {
 	r := c.Get(k)
 	if r == nil {
 		return d
@@ -161,7 +211,7 @@ func (c *Config) GetStringSlice(k string, d []string) []string {
 }
 
 // GetMap will get the map for k or return the default d if not found or invalid
-func (c *Config) GetMap(k string, d map[interface{}]interface{}) map[interface{}]interface{} {
+func (c *C) GetMap(k string, d map[interface{}]interface{}) map[interface{}]interface{} {
 	r := c.Get(k)
 	if r == nil {
 		return d
@@ -176,7 +226,7 @@ func (c *Config) GetMap(k string, d map[interface{}]interface{}) map[interface{}
 }
 
 // GetInt will get the int for k or return the default d if not found or invalid
-func (c *Config) GetInt(k string, d int) int {
+func (c *C) GetInt(k string, d int) int {
 	r := c.GetString(k, strconv.Itoa(d))
 	v, err := strconv.Atoi(r)
 	if err != nil {
@@ -187,7 +237,7 @@ func (c *Config) GetInt(k string, d int) int {
 }
 
 // GetBool will get the bool for k or return the default d if not found or invalid
-func (c *Config) GetBool(k string, d bool) bool {
+func (c *C) GetBool(k string, d bool) bool {
 	r := strings.ToLower(c.GetString(k, fmt.Sprintf("%v", d)))
 	v, err := strconv.ParseBool(r)
 	if err != nil {
@@ -204,7 +254,7 @@ func (c *Config) GetBool(k string, d bool) bool {
 }
 
 // GetDuration will get the duration for k or return the default d if not found or invalid
-func (c *Config) GetDuration(k string, d time.Duration) time.Duration {
+func (c *C) GetDuration(k string, d time.Duration) time.Duration {
 	r := c.GetString(k, "")
 	v, err := time.ParseDuration(r)
 	if err != nil {
@@ -213,11 +263,15 @@ func (c *Config) GetDuration(k string, d time.Duration) time.Duration {
 	return v
 }
 
-func (c *Config) Get(k string) interface{} {
+func (c *C) Get(k string) interface{} {
 	return c.get(k, c.Settings)
 }
 
-func (c *Config) get(k string, v interface{}) interface{} {
+func (c *C) IsSet(k string) bool {
+	return c.get(k, c.Settings) != nil
+}
+
+func (c *C) get(k string, v interface{}) interface{} {
 	parts := strings.Split(k, ".")
 	for _, p := range parts {
 		m, ok := v.(map[interface{}]interface{})
@@ -234,14 +288,16 @@ func (c *Config) get(k string, v interface{}) interface{} {
 	return v
 }
 
-func (c *Config) resolve(path string) error {
+// direct signifies if this is the config path directly specified by the user,
+// versus a file/dir found by recursing into that path
+func (c *C) resolve(path string, direct bool) error {
 	i, err := os.Stat(path)
 	if err != nil {
 		return nil
 	}
 
 	if !i.IsDir() {
-		c.addFile(path)
+		c.addFile(path, direct)
 		return nil
 	}
 
@@ -251,7 +307,7 @@ func (c *Config) resolve(path string) error {
 	}
 
 	for _, p := range paths {
-		err := c.resolve(filepath.Join(path, p))
+		err := c.resolve(filepath.Join(path, p), false)
 		if err != nil {
 			return err
 		}
@@ -260,10 +316,10 @@ func (c *Config) resolve(path string) error {
 	return nil
 }
 
-func (c *Config) addFile(path string) error {
+func (c *C) addFile(path string, direct bool) error {
 	ext := filepath.Ext(path)
 
-	if ext != ".yaml" && ext != ".yml" {
+	if !direct && ext != ".yaml" && ext != ".yml" {
 		return nil
 	}
 
@@ -276,7 +332,19 @@ func (c *Config) addFile(path string) error {
 	return nil
 }
 
-func (c *Config) parse() error {
+func (c *C) parseRaw(b []byte) error {
+	var m map[interface{}]interface{}
+
+	err := yaml.Unmarshal(b, &m)
+	if err != nil {
+		return err
+	}
+
+	c.Settings = m
+	return nil
+}
+
+func (c *C) parse() error {
 	var m map[interface{}]interface{}
 
 	for _, path := range c.files {
@@ -319,24 +387,3 @@ func readDirNames(path string) ([]string, error) {
 	sort.Strings(paths)
 	return paths, nil
 }
-
-func configLogger(c *Config) error {
-	// set up our logging level
-	logLevel, err := logrus.ParseLevel(strings.ToLower(c.GetString("logging.level", "info")))
-	if err != nil {
-		return fmt.Errorf("%s; possible levels: %s", err, logrus.AllLevels)
-	}
-	l.SetLevel(logLevel)
-
-	logFormat := strings.ToLower(c.GetString("logging.format", "text"))
-	switch logFormat {
-	case "text":
-		l.Formatter = &logrus.TextFormatter{}
-	case "json":
-		l.Formatter = &logrus.JSONFormatter{}
-	default:
-		return fmt.Errorf("unknown log format `%s`. possible formats: %s", logFormat, []string{"text", "json"})
-	}
-
-	return nil
-}

config/config_test.go

@@ -1,23 +1,26 @@
-package nebula
+package config
 
 import (
-	"github.com/stretchr/testify/assert"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
 	"time"
+
+	"github.com/slackhq/nebula/test"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestConfig_Load(t *testing.T) {
+	l := test.NewLogger()
 	dir, err := ioutil.TempDir("", "config-test")
 	// invalid yaml
-	c := NewConfig()
+	c := NewC(l)
 	ioutil.WriteFile(filepath.Join(dir, "01.yaml"), []byte(" invalid yaml"), 0644)
 	assert.EqualError(t, c.Load(dir), "yaml: unmarshal errors:\n  line 1: cannot unmarshal !!str `invalid...` into map[interface {}]interface {}")
 
 	// simple multi config merge
-	c = NewConfig()
+	c = NewC(l)
 	os.RemoveAll(dir)
 	os.Mkdir(dir, 0755)
 
@@ -39,8 +42,9 @@ func TestConfig_Load(t *testing.T) {
 }
 
 func TestConfig_Get(t *testing.T) {
+	l := test.NewLogger()
 	// test simple type
-	c := NewConfig()
+	c := NewC(l)
 	c.Settings["firewall"] = map[interface{}]interface{}{"outbound": "hi"}
 	assert.Equal(t, "hi", c.Get("firewall.outbound"))
 
@@ -54,13 +58,15 @@ func TestConfig_Get(t *testing.T) {
 }
 
 func TestConfig_GetStringSlice(t *testing.T) {
-	c := NewConfig()
+	l := test.NewLogger()
+	c := NewC(l)
 	c.Settings["slice"] = []interface{}{"one", "two"}
 	assert.Equal(t, []string{"one", "two"}, c.GetStringSlice("slice", []string{}))
 }
 
 func TestConfig_GetBool(t *testing.T) {
-	c := NewConfig()
+	l := test.NewLogger()
+	c := NewC(l)
 	c.Settings["bool"] = true
 	assert.Equal(t, true, c.GetBool("bool", false))
 
@@ -87,20 +93,21 @@ func TestConfig_GetBool(t *testing.T) {
 }
 
 func TestConfig_HasChanged(t *testing.T) {
+	l := test.NewLogger()
 	// No reload has occurred, return false
-	c := NewConfig()
+	c := NewC(l)
 	c.Settings["test"] = "hi"
 	assert.False(t, c.HasChanged(""))
 
 	// Test key change
-	c = NewConfig()
+	c = NewC(l)
 	c.Settings["test"] = "hi"
 	c.oldSettings = map[interface{}]interface{}{"test": "no"}
 	assert.True(t, c.HasChanged("test"))
 	assert.True(t, c.HasChanged(""))
 
 	// No key change
-	c = NewConfig()
+	c = NewC(l)
 	c.Settings["test"] = "hi"
 	c.oldSettings = map[interface{}]interface{}{"test": "hi"}
 	assert.False(t, c.HasChanged("test"))
@@ -108,12 +115,13 @@ func TestConfig_HasChanged(t *testing.T) {
 }
 
 func TestConfig_ReloadConfig(t *testing.T) {
+	l := test.NewLogger()
 	done := make(chan bool, 1)
 	dir, err := ioutil.TempDir("", "config-test")
 	assert.Nil(t, err)
 	ioutil.WriteFile(filepath.Join(dir, "01.yaml"), []byte("outer:\n  inner: hi"), 0644)
 
-	c := NewConfig()
+	c := NewC(l)
 	assert.Nil(t, c.Load(dir))
 
 	assert.False(t, c.HasChanged("outer.inner"))
@@ -122,7 +130,7 @@ func TestConfig_ReloadConfig(t *testing.T) {
 
 	ioutil.WriteFile(filepath.Join(dir, "01.yaml"), []byte("outer:\n  inner: ho"), 0644)
 
-	c.RegisterReloadCallback(func(c *Config) {
+	c.RegisterReloadCallback(func(c *C) {
 		done <- true
 	})
 

connection_manager.go

@@ -1,10 +1,13 @@
 package nebula
 
 import (
+	"context"
 	"sync"
 	"time"
 
 	"github.com/sirupsen/logrus"
+	"github.com/slackhq/nebula/header"
+	"github.com/slackhq/nebula/iputil"
 )
 
 // TODO: incount and outcount are intended as a shortcut to locking the mutexes for every single packet
@@ -12,47 +15,49 @@ import (
 
 type connectionManager struct {
 	hostMap      *HostMap
-	in           map[uint32]struct{}
+	in           map[iputil.VpnIp]struct{}
 	inLock       *sync.RWMutex
 	inCount      int
-	out          map[uint32]struct{}
+	out          map[iputil.VpnIp]struct{}
 	outLock      *sync.RWMutex
 	outCount     int
 	TrafficTimer *SystemTimerWheel
 	intf         *Interface
 
-	pendingDeletion      map[uint32]int
+	pendingDeletion      map[iputil.VpnIp]int
 	pendingDeletionLock  *sync.RWMutex
 	pendingDeletionTimer *SystemTimerWheel
 
 	checkInterval           int
 	pendingDeletionInterval int
 
+	l *logrus.Logger
 	// I wanted to call one matLock
 }
 
-func newConnectionManager(intf *Interface, checkInterval, pendingDeletionInterval int) *connectionManager {
+func newConnectionManager(ctx context.Context, l *logrus.Logger, intf *Interface, checkInterval, pendingDeletionInterval int) *connectionManager {
 	nc := &connectionManager{
 		hostMap:                 intf.hostMap,
-		in:                      make(map[uint32]struct{}),
+		in:                      make(map[iputil.VpnIp]struct{}),
 		inLock:                  &sync.RWMutex{},
 		inCount:                 0,
-		out:                     make(map[uint32]struct{}),
+		out:                     make(map[iputil.VpnIp]struct{}),
 		outLock:                 &sync.RWMutex{},
 		outCount:                0,
 		TrafficTimer:            NewSystemTimerWheel(time.Millisecond*500, time.Second*60),
 		intf:                    intf,
-		pendingDeletion:         make(map[uint32]int),
+		pendingDeletion:         make(map[iputil.VpnIp]int),
 		pendingDeletionLock:     &sync.RWMutex{},
 		pendingDeletionTimer:    NewSystemTimerWheel(time.Millisecond*500, time.Second*60),
 		checkInterval:           checkInterval,
 		pendingDeletionInterval: pendingDeletionInterval,
+		l:                       l,
 	}
-	nc.Start()
+	nc.Start(ctx)
 	return nc
 }
 
-func (n *connectionManager) In(ip uint32) {
+func (n *connectionManager) In(ip iputil.VpnIp) {
 	n.inLock.RLock()
 	// If this already exists, return
 	if _, ok := n.in[ip]; ok {
@@ -65,7 +70,7 @@ func (n *connectionManager) In(ip uint32) {
 	n.inLock.Unlock()
 }
 
-func (n *connectionManager) Out(ip uint32) {
+func (n *connectionManager) Out(ip iputil.VpnIp) {
 	n.outLock.RLock()
 	// If this already exists, return
 	if _, ok := n.out[ip]; ok {
@@ -84,9 +89,9 @@ func (n *connectionManager) Out(ip uint32) {
 	n.outLock.Unlock()
 }
 
-func (n *connectionManager) CheckIn(vpnIP uint32) bool {
+func (n *connectionManager) CheckIn(vpnIp iputil.VpnIp) bool {
 	n.inLock.RLock()
-	if _, ok := n.in[vpnIP]; ok {
+	if _, ok := n.in[vpnIp]; ok {
 		n.inLock.RUnlock()
 		return true
 	}
@@ -94,7 +99,7 @@ func (n *connectionManager) CheckIn(vpnIP uint32) bool {
 	return false
 }
 
-func (n *connectionManager) ClearIP(ip uint32) {
+func (n *connectionManager) ClearIP(ip iputil.VpnIp) {
 	n.inLock.Lock()
 	n.outLock.Lock()
 	delete(n.in, ip)
@@ -103,13 +108,13 @@ func (n *connectionManager) ClearIP(ip uint32) {
 	n.outLock.Unlock()
 }
 
-func (n *connectionManager) ClearPendingDeletion(ip uint32) {
+func (n *connectionManager) ClearPendingDeletion(ip iputil.VpnIp) {
 	n.pendingDeletionLock.Lock()
 	delete(n.pendingDeletion, ip)
 	n.pendingDeletionLock.Unlock()
 }
 
-func (n *connectionManager) AddPendingDeletion(ip uint32) {
+func (n *connectionManager) AddPendingDeletion(ip iputil.VpnIp) {
 	n.pendingDeletionLock.Lock()
 	if _, ok := n.pendingDeletion[ip]; ok {
 		n.pendingDeletion[ip] += 1
@@ -120,7 +125,7 @@ func (n *connectionManager) AddPendingDeletion(ip uint32) {
 	n.pendingDeletionLock.Unlock()
 }
 
-func (n *connectionManager) checkPendingDeletion(ip uint32) bool {
+func (n *connectionManager) checkPendingDeletion(ip iputil.VpnIp) bool {
 	n.pendingDeletionLock.RLock()
 	if _, ok := n.pendingDeletion[ip]; ok {
 
@@ -131,24 +136,34 @@ func (n *connectionManager) checkPendingDeletion(ip uint32) bool {
 	return false
 }
 
-func (n *connectionManager) AddTrafficWatch(vpnIP uint32, seconds int) {
+func (n *connectionManager) AddTrafficWatch(vpnIp iputil.VpnIp, seconds int) {
-	n.TrafficTimer.Add(vpnIP, time.Second*time.Duration(seconds))
+	n.TrafficTimer.Add(vpnIp, time.Second*time.Duration(seconds))
 }
 
-func (n *connectionManager) Start() {
+func (n *connectionManager) Start(ctx context.Context) {
-	go n.Run()
+	go n.Run(ctx)
 }
 
-func (n *connectionManager) Run() {
+func (n *connectionManager) Run(ctx context.Context) {
-	clockSource := time.Tick(500 * time.Millisecond)
+	clockSource := time.NewTicker(500 * time.Millisecond)
+	defer clockSource.Stop()
 
-	for now := range clockSource {
+	p := []byte("")
-		n.HandleMonitorTick(now)
+	nb := make([]byte, 12, 12)
+	out := make([]byte, mtu)
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case now := <-clockSource.C:
+			n.HandleMonitorTick(now, p, nb, out)
 			n.HandleDeletionTick(now)
 		}
+	}
 }
 
-func (n *connectionManager) HandleMonitorTick(now time.Time) {
+func (n *connectionManager) HandleMonitorTick(now time.Time, p, nb, out []byte) {
 	n.TrafficTimer.advance(now)
 	for {
 		ep := n.TrafficTimer.Purge()
@@ -156,44 +171,48 @@ func (n *connectionManager) HandleMonitorTick(now time.Time) {
 			break
 		}
 
-		vpnIP := ep.(uint32)
+		vpnIp := ep.(iputil.VpnIp)
 
 		// Check for traffic coming back in from this host.
-		traf := n.CheckIn(vpnIP)
+		traf := n.CheckIn(vpnIp)
 
-		// If we saw incoming packets from this ip, just return
+		hostinfo, err := n.hostMap.QueryVpnIp(vpnIp)
+		if err != nil {
+			n.l.Debugf("Not found in hostmap: %s", vpnIp)
+			n.ClearIP(vpnIp)
+			n.ClearPendingDeletion(vpnIp)
+			continue
+		}
+
+		if n.handleInvalidCertificate(now, vpnIp, hostinfo) {
+			continue
+		}
+
+		// If we saw an incoming packets from this ip and peer's certificate is not
+		// expired, just ignore.
 		if traf {
-			if l.Level >= logrus.DebugLevel {
+			if n.l.Level >= logrus.DebugLevel {
-				l.WithField("vpnIp", IntIp(vpnIP)).
+				n.l.WithField("vpnIp", vpnIp).
 					WithField("tunnelCheck", m{"state": "alive", "method": "passive"}).
 					Debug("Tunnel status")
 			}
-			n.ClearIP(vpnIP)
+			n.ClearIP(vpnIp)
-			n.ClearPendingDeletion(vpnIP)
+			n.ClearPendingDeletion(vpnIp)
 			continue
 		}
 
-		// If we didn't we may need to probe or destroy the conn
+		hostinfo.logger(n.l).
-		hostinfo, err := n.hostMap.QueryVpnIP(vpnIP)
-		if err != nil {
-			l.Debugf("Not found in hostmap: %s", IntIp(vpnIP))
-			n.ClearIP(vpnIP)
-			n.ClearPendingDeletion(vpnIP)
-			continue
-		}
-
-		l.WithField("vpnIp", IntIp(vpnIP)).
 			WithField("tunnelCheck", m{"state": "testing", "method": "active"}).
 			Debug("Tunnel status")
 
 		if hostinfo != nil && hostinfo.ConnectionState != nil {
 			// Send a test packet to trigger an authenticated tunnel test, this should suss out any lingering tunnel issues
-			n.intf.SendMessageToVpnIp(test, testRequest, vpnIP, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
+			n.intf.SendMessageToVpnIp(header.Test, header.TestRequest, vpnIp, p, nb, out)
 
 		} else {
-			l.Debugf("Hostinfo sadness: %s", IntIp(vpnIP))
+			hostinfo.logger(n.l).Debugf("Hostinfo sadness: %s", vpnIp)
 		}
-		n.AddPendingDeletion(vpnIP)
+		n.AddPendingDeletion(vpnIp)
 	}
 
 }
@@ -206,49 +225,85 @@ func (n *connectionManager) HandleDeletionTick(now time.Time) {
 			break
 		}
 
-		vpnIP := ep.(uint32)
+		vpnIp := ep.(iputil.VpnIp)
 
-		// If we saw incoming packets from this ip, just return
+		hostinfo, err := n.hostMap.QueryVpnIp(vpnIp)
-		traf := n.CheckIn(vpnIP)
+		if err != nil {
-		if traf {
+			n.l.Debugf("Not found in hostmap: %s", vpnIp)
-			l.WithField("vpnIp", IntIp(vpnIP)).
+			n.ClearIP(vpnIp)
-				WithField("tunnelCheck", m{"state": "alive", "method": "active"}).
+			n.ClearPendingDeletion(vpnIp)
-				Debug("Tunnel status")
-			n.ClearIP(vpnIP)
-			n.ClearPendingDeletion(vpnIP)
 			continue
 		}
 
-		hostinfo, err := n.hostMap.QueryVpnIP(vpnIP)
+		if n.handleInvalidCertificate(now, vpnIp, hostinfo) {
-		if err != nil {
+			continue
-			n.ClearIP(vpnIP)
+		}
-			n.ClearPendingDeletion(vpnIP)
+
-			l.Debugf("Not found in hostmap: %s", IntIp(vpnIP))
+		// If we saw an incoming packets from this ip and peer's certificate is not
+		// expired, just ignore.
+		traf := n.CheckIn(vpnIp)
+		if traf {
+			n.l.WithField("vpnIp", vpnIp).
+				WithField("tunnelCheck", m{"state": "alive", "method": "active"}).
+				Debug("Tunnel status")
+
+			n.ClearIP(vpnIp)
+			n.ClearPendingDeletion(vpnIp)
 			continue
 		}
 
 		// If it comes around on deletion wheel and hasn't resolved itself, delete
-		if n.checkPendingDeletion(vpnIP) {
+		if n.checkPendingDeletion(vpnIp) {
 			cn := ""
 			if hostinfo.ConnectionState != nil && hostinfo.ConnectionState.peerCert != nil {
 				cn = hostinfo.ConnectionState.peerCert.Details.Name
 			}
-			l.WithField("vpnIp", IntIp(vpnIP)).
+			hostinfo.logger(n.l).
 				WithField("tunnelCheck", m{"state": "dead", "method": "active"}).
 				WithField("certName", cn).
 				Info("Tunnel status")
 
-			n.ClearIP(vpnIP)
+			n.ClearIP(vpnIp)
-			n.ClearPendingDeletion(vpnIP)
+			n.ClearPendingDeletion(vpnIp)
 			// TODO: This is only here to let tests work. Should do proper mocking
 			if n.intf.lightHouse != nil {
-				n.intf.lightHouse.DeleteVpnIP(vpnIP)
+				n.intf.lightHouse.DeleteVpnIp(vpnIp)
 			}
-			n.hostMap.DeleteVpnIP(vpnIP)
+			n.hostMap.DeleteHostInfo(hostinfo)
-			n.hostMap.DeleteIndex(hostinfo.localIndexId)
 		} else {
-			n.ClearIP(vpnIP)
+			n.ClearIP(vpnIp)
-			n.ClearPendingDeletion(vpnIP)
+			n.ClearPendingDeletion(vpnIp)
 		}
 	}
 }
+
+// handleInvalidCertificates will destroy a tunnel if pki.disconnect_invalid is true and the certificate is no longer valid
+func (n *connectionManager) handleInvalidCertificate(now time.Time, vpnIp iputil.VpnIp, hostinfo *HostInfo) bool {
+	if !n.intf.disconnectInvalid {
+		return false
+	}
+
+	remoteCert := hostinfo.GetCert()
+	if remoteCert == nil {
+		return false
+	}
+
+	valid, err := remoteCert.Verify(now, n.intf.caPool)
+	if valid {
+		return false
+	}
+
+	fingerprint, _ := remoteCert.Sha256Sum()
+	n.l.WithField("vpnIp", vpnIp).WithError(err).
+		WithField("certName", remoteCert.Details.Name).
+		WithField("fingerprint", fingerprint).
+		Info("Remote certificate is no longer valid, tearing down the tunnel")
+
+	// Inform the remote and close the tunnel locally
+	n.intf.sendCloseTunnel(hostinfo)
+	n.intf.closeTunnel(hostinfo)
+
+	n.ClearIP(vpnIp)
+	n.ClearPendingDeletion(vpnIp)
+	return true
+}

connection_manager_test.go

@@ -1,26 +1,33 @@
 package nebula
 
 import (
+	"context"
+	"crypto/ed25519"
+	"crypto/rand"
 	"net"
 	"testing"
 	"time"
 
 	"github.com/flynn/noise"
 	"github.com/slackhq/nebula/cert"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/test"
+	"github.com/slackhq/nebula/udp"
 	"github.com/stretchr/testify/assert"
 )
 
-var vpnIP uint32
+var vpnIp iputil.VpnIp
 
 func Test_NewConnectionManagerTest(t *testing.T) {
+	l := test.NewLogger()
 	//_, tuncidr, _ := net.ParseCIDR("1.1.1.1/24")
 	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
 	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
-	vpnIP = ip2int(net.ParseIP("172.1.1.2"))
+	vpnIp = iputil.Ip2VpnIp(net.ParseIP("172.1.1.2"))
 	preferredRanges := []*net.IPNet{localrange}
 
 	// Very incomplete mock objects
-	hostMap := NewHostMap("test", vpncidr, preferredRanges)
+	hostMap := NewHostMap(l, "test", vpncidr, preferredRanges)
 	cs := &CertState{
 		rawCertificate:      []byte{},
 		privateKey:          []byte{},
@@ -28,62 +35,68 @@ func Test_NewConnectionManagerTest(t *testing.T) {
 		rawCertificateNoKey: []byte{},
 	}
 
-	lh := NewLightHouse(false, 0, []uint32{}, 1000, 0, &udpConn{}, false)
+	lh := &LightHouse{l: l, atomicStaticList: make(map[iputil.VpnIp]struct{}), atomicLighthouses: make(map[iputil.VpnIp]struct{})}
 	ifce := &Interface{
 		hostMap:          hostMap,
-		inside:           &Tun{},
+		inside:           &test.NoopTun{},
-		outside:          &udpConn{},
+		outside:          &udp.Conn{},
 		certState:        cs,
 		firewall:         &Firewall{},
 		lightHouse:       lh,
-		handshakeManager: NewHandshakeManager(vpncidr, preferredRanges, hostMap, lh, &udpConn{}),
+		handshakeManager: NewHandshakeManager(l, vpncidr, preferredRanges, hostMap, lh, &udp.Conn{}, defaultHandshakeConfig),
+		l:                l,
 	}
 	now := time.Now()
 
 	// Create manager
-	nc := newConnectionManager(ifce, 5, 10)
+	ctx, cancel := context.WithCancel(context.Background())
-	nc.HandleMonitorTick(now)
+	defer cancel()
+	nc := newConnectionManager(ctx, l, ifce, 5, 10)
+	p := []byte("")
+	nb := make([]byte, 12, 12)
+	out := make([]byte, mtu)
+	nc.HandleMonitorTick(now, p, nb, out)
 	// Add an ip we have established a connection w/ to hostmap
-	hostinfo := nc.hostMap.AddVpnIP(vpnIP)
+	hostinfo, _ := nc.hostMap.AddVpnIp(vpnIp, nil)
 	hostinfo.ConnectionState = &ConnectionState{
 		certState: cs,
 		H:         &noise.HandshakeState{},
-		messageCounter: new(uint64),
 	}
 
-	// We saw traffic out to vpnIP
+	// We saw traffic out to vpnIp
-	nc.Out(vpnIP)
+	nc.Out(vpnIp)
-	assert.NotContains(t, nc.pendingDeletion, vpnIP)
+	assert.NotContains(t, nc.pendingDeletion, vpnIp)
-	assert.Contains(t, nc.hostMap.Hosts, vpnIP)
+	assert.Contains(t, nc.hostMap.Hosts, vpnIp)
 	// Move ahead 5s. Nothing should happen
 	next_tick := now.Add(5 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// Move ahead 6s. We haven't heard back
 	next_tick = now.Add(6 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// This host should now be up for deletion
-	assert.Contains(t, nc.pendingDeletion, vpnIP)
+	assert.Contains(t, nc.pendingDeletion, vpnIp)
-	assert.Contains(t, nc.hostMap.Hosts, vpnIP)
+	assert.Contains(t, nc.hostMap.Hosts, vpnIp)
 	// Move ahead some more
 	next_tick = now.Add(45 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// The host should be evicted
-	assert.NotContains(t, nc.pendingDeletion, vpnIP)
+	assert.NotContains(t, nc.pendingDeletion, vpnIp)
-	assert.NotContains(t, nc.hostMap.Hosts, vpnIP)
+	assert.NotContains(t, nc.hostMap.Hosts, vpnIp)
 
 }
 
 func Test_NewConnectionManagerTest2(t *testing.T) {
+	l := test.NewLogger()
 	//_, tuncidr, _ := net.ParseCIDR("1.1.1.1/24")
 	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
 	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
 	preferredRanges := []*net.IPNet{localrange}
 
 	// Very incomplete mock objects
-	hostMap := NewHostMap("test", vpncidr, preferredRanges)
+	hostMap := NewHostMap(l, "test", vpncidr, preferredRanges)
 	cs := &CertState{
 		rawCertificate:      []byte{},
 		privateKey:          []byte{},
@@ -91,52 +104,152 @@ func Test_NewConnectionManagerTest2(t *testing.T) {
 		rawCertificateNoKey: []byte{},
 	}
 
-	lh := NewLightHouse(false, 0, []uint32{}, 1000, 0, &udpConn{}, false)
+	lh := &LightHouse{l: l, atomicStaticList: make(map[iputil.VpnIp]struct{}), atomicLighthouses: make(map[iputil.VpnIp]struct{})}
 	ifce := &Interface{
 		hostMap:          hostMap,
-		inside:           &Tun{},
+		inside:           &test.NoopTun{},
-		outside:          &udpConn{},
+		outside:          &udp.Conn{},
 		certState:        cs,
 		firewall:         &Firewall{},
 		lightHouse:       lh,
-		handshakeManager: NewHandshakeManager(vpncidr, preferredRanges, hostMap, lh, &udpConn{}),
+		handshakeManager: NewHandshakeManager(l, vpncidr, preferredRanges, hostMap, lh, &udp.Conn{}, defaultHandshakeConfig),
+		l:                l,
 	}
 	now := time.Now()
 
 	// Create manager
-	nc := newConnectionManager(ifce, 5, 10)
+	ctx, cancel := context.WithCancel(context.Background())
-	nc.HandleMonitorTick(now)
+	defer cancel()
+	nc := newConnectionManager(ctx, l, ifce, 5, 10)
+	p := []byte("")
+	nb := make([]byte, 12, 12)
+	out := make([]byte, mtu)
+	nc.HandleMonitorTick(now, p, nb, out)
 	// Add an ip we have established a connection w/ to hostmap
-	hostinfo := nc.hostMap.AddVpnIP(vpnIP)
+	hostinfo, _ := nc.hostMap.AddVpnIp(vpnIp, nil)
 	hostinfo.ConnectionState = &ConnectionState{
 		certState: cs,
 		H:         &noise.HandshakeState{},
-		messageCounter: new(uint64),
 	}
 
-	// We saw traffic out to vpnIP
+	// We saw traffic out to vpnIp
-	nc.Out(vpnIP)
+	nc.Out(vpnIp)
-	assert.NotContains(t, nc.pendingDeletion, vpnIP)
+	assert.NotContains(t, nc.pendingDeletion, vpnIp)
-	assert.Contains(t, nc.hostMap.Hosts, vpnIP)
+	assert.Contains(t, nc.hostMap.Hosts, vpnIp)
 	// Move ahead 5s. Nothing should happen
 	next_tick := now.Add(5 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// Move ahead 6s. We haven't heard back
 	next_tick = now.Add(6 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// This host should now be up for deletion
-	assert.Contains(t, nc.pendingDeletion, vpnIP)
+	assert.Contains(t, nc.pendingDeletion, vpnIp)
-	assert.Contains(t, nc.hostMap.Hosts, vpnIP)
+	assert.Contains(t, nc.hostMap.Hosts, vpnIp)
 	// We heard back this time
-	nc.In(vpnIP)
+	nc.In(vpnIp)
 	// Move ahead some more
 	next_tick = now.Add(45 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// The host should be evicted
-	assert.NotContains(t, nc.pendingDeletion, vpnIP)
+	assert.NotContains(t, nc.pendingDeletion, vpnIp)
-	assert.Contains(t, nc.hostMap.Hosts, vpnIP)
+	assert.Contains(t, nc.hostMap.Hosts, vpnIp)
 
 }
+
+// Check if we can disconnect the peer.
+// Validate if the peer's certificate is invalid (expired, etc.)
+// Disconnect only if disconnectInvalid: true is set.
+func Test_NewConnectionManagerTest_DisconnectInvalid(t *testing.T) {
+	now := time.Now()
+	l := test.NewLogger()
+	ipNet := net.IPNet{
+		IP:   net.IPv4(172, 1, 1, 2),
+		Mask: net.IPMask{255, 255, 255, 0},
+	}
+	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
+	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
+	preferredRanges := []*net.IPNet{localrange}
+	hostMap := NewHostMap(l, "test", vpncidr, preferredRanges)
+
+	// Generate keys for CA and peer's cert.
+	pubCA, privCA, _ := ed25519.GenerateKey(rand.Reader)
+	caCert := cert.NebulaCertificate{
+		Details: cert.NebulaCertificateDetails{
+			Name:      "ca",
+			NotBefore: now,
+			NotAfter:  now.Add(1 * time.Hour),
+			IsCA:      true,
+			PublicKey: pubCA,
+		},
+	}
+	caCert.Sign(privCA)
+	ncp := &cert.NebulaCAPool{
+		CAs: cert.NewCAPool().CAs,
+	}
+	ncp.CAs["ca"] = &caCert
+
+	pubCrt, _, _ := ed25519.GenerateKey(rand.Reader)
+	peerCert := cert.NebulaCertificate{
+		Details: cert.NebulaCertificateDetails{
+			Name:      "host",
+			Ips:       []*net.IPNet{&ipNet},
+			Subnets:   []*net.IPNet{},
+			NotBefore: now,
+			NotAfter:  now.Add(60 * time.Second),
+			PublicKey: pubCrt,
+			IsCA:      false,
+			Issuer:    "ca",
+		},
+	}
+	peerCert.Sign(privCA)
+
+	cs := &CertState{
+		rawCertificate:      []byte{},
+		privateKey:          []byte{},
+		certificate:         &cert.NebulaCertificate{},
+		rawCertificateNoKey: []byte{},
+	}
+
+	lh := &LightHouse{l: l, atomicStaticList: make(map[iputil.VpnIp]struct{}), atomicLighthouses: make(map[iputil.VpnIp]struct{})}
+	ifce := &Interface{
+		hostMap:           hostMap,
+		inside:            &test.NoopTun{},
+		outside:           &udp.Conn{},
+		certState:         cs,
+		firewall:          &Firewall{},
+		lightHouse:        lh,
+		handshakeManager:  NewHandshakeManager(l, vpncidr, preferredRanges, hostMap, lh, &udp.Conn{}, defaultHandshakeConfig),
+		l:                 l,
+		disconnectInvalid: true,
+		caPool:            ncp,
+	}
+
+	// Create manager
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	nc := newConnectionManager(ctx, l, ifce, 5, 10)
+	ifce.connectionManager = nc
+	hostinfo, _ := nc.hostMap.AddVpnIp(vpnIp, nil)
+	hostinfo.ConnectionState = &ConnectionState{
+		certState: cs,
+		peerCert:  &peerCert,
+		H:         &noise.HandshakeState{},
+	}
+
+	// Move ahead 45s.
+	// Check if to disconnect with invalid certificate.
+	// Should be alive.
+	nextTick := now.Add(45 * time.Second)
+	destroyed := nc.handleInvalidCertificate(nextTick, vpnIp, hostinfo)
+	assert.False(t, destroyed)
+
+	// Move ahead 61s.
+	// Check if to disconnect with invalid certificate.
+	// Should be disconnected.
+	nextTick = now.Add(61 * time.Second)
+	destroyed = nc.handleInvalidCertificate(nextTick, vpnIp, hostinfo)
+	assert.True(t, destroyed)
+}

connection_state.go

@@ -4,8 +4,10 @@ import (
 	"crypto/rand"
 	"encoding/json"
 	"sync"
+	"sync/atomic"
 
 	"github.com/flynn/noise"
+	"github.com/sirupsen/logrus"
 	"github.com/slackhq/nebula/cert"
 )
 
@@ -18,14 +20,14 @@ type ConnectionState struct {
 	certState            *CertState
 	peerCert             *cert.NebulaCertificate
 	initiator            bool
-	messageCounter *uint64
+	atomicMessageCounter uint64
 	window               *Bits
 	queueLock            sync.Mutex
 	writeLock            sync.Mutex
 	ready                bool
 }
 
-func (f *Interface) newConnectionState(initiator bool, pattern noise.HandshakePattern, psk []byte, pskStage int) *ConnectionState {
+func (f *Interface) newConnectionState(l *logrus.Logger, initiator bool, pattern noise.HandshakePattern, psk []byte, pskStage int) *ConnectionState {
 	cs := noise.NewCipherSuite(noise.DH25519, noise.CipherAESGCM, noise.HashSHA256)
 	if f.cipher == "chachapoly" {
 		cs = noise.NewCipherSuite(noise.DH25519, noise.CipherChaChaPoly, noise.HashSHA256)
@@ -36,7 +38,7 @@ func (f *Interface) newConnectionState(initiator bool, pattern noise.HandshakePa
 
 	b := NewBits(ReplayWindow)
 	// Clear out bit 0, we never transmit it and we don't want it showing as packet loss
-	b.Update(0)
+	b.Update(l, 0)
 
 	hs, err := noise.NewHandshakeState(noise.Config{
 		CipherSuite:           cs,
@@ -59,7 +61,6 @@ func (f *Interface) newConnectionState(initiator bool, pattern noise.HandshakePa
 		window:    b,
 		ready:     false,
 		certState: curCertState,
-		messageCounter: new(uint64),
 	}
 
 	return ci
@@ -69,7 +70,7 @@ func (cs *ConnectionState) MarshalJSON() ([]byte, error) {
 	return json.Marshal(m{
 		"certificate":     cs.peerCert,
 		"initiator":       cs.initiator,
-		"message_counter": cs.messageCounter,
+		"message_counter": atomic.LoadUint64(&cs.atomicMessageCounter),
 		"ready":           cs.ready,
 	})
 }

control.go

@@ -0,0 +1,247 @@
+package nebula
+
+import (
+	"context"
+	"net"
+	"os"
+	"os/signal"
+	"sync/atomic"
+	"syscall"
+
+	"github.com/sirupsen/logrus"
+	"github.com/slackhq/nebula/cert"
+	"github.com/slackhq/nebula/header"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/udp"
+)
+
+// Every interaction here needs to take extra care to copy memory and not return or use arguments "as is" when touching
+// core. This means copying IP objects, slices, de-referencing pointers and taking the actual value, etc
+
+type Control struct {
+	f          *Interface
+	l          *logrus.Logger
+	cancel     context.CancelFunc
+	sshStart   func()
+	statsStart func()
+	dnsStart   func()
+}
+
+type ControlHostInfo struct {
+	VpnIp                  net.IP                  `json:"vpnIp"`
+	LocalIndex             uint32                  `json:"localIndex"`
+	RemoteIndex            uint32                  `json:"remoteIndex"`
+	RemoteAddrs            []*udp.Addr             `json:"remoteAddrs"`
+	CachedPackets          int                     `json:"cachedPackets"`
+	Cert                   *cert.NebulaCertificate `json:"cert"`
+	MessageCounter         uint64                  `json:"messageCounter"`
+	CurrentRemote          *udp.Addr               `json:"currentRemote"`
+	CurrentRelaysToMe      []iputil.VpnIp          `json:"currentRelaysToMe"`
+	CurrentRelaysThroughMe []iputil.VpnIp          `json:"currentRelaysThroughMe"`
+}
+
+// Start actually runs nebula, this is a nonblocking call. To block use Control.ShutdownBlock()
+func (c *Control) Start() {
+	// Activate the interface
+	c.f.activate()
+
+	// Call all the delayed funcs that waited patiently for the interface to be created.
+	if c.sshStart != nil {
+		go c.sshStart()
+	}
+	if c.statsStart != nil {
+		go c.statsStart()
+	}
+	if c.dnsStart != nil {
+		go c.dnsStart()
+	}
+
+	// Start reading packets.
+	c.f.run()
+}
+
+// Stop signals nebula to shutdown, returns after the shutdown is complete
+func (c *Control) Stop() {
+	// Stop the handshakeManager (and other serivces), to prevent new tunnels from
+	// being created while we're shutting them all down.
+	c.cancel()
+
+	c.CloseAllTunnels(false)
+	if err := c.f.Close(); err != nil {
+		c.l.WithError(err).Error("Close interface failed")
+	}
+	c.l.Info("Goodbye")
+}
+
+// ShutdownBlock will listen for and block on term and interrupt signals, calling Control.Stop() once signalled
+func (c *Control) ShutdownBlock() {
+	sigChan := make(chan os.Signal)
+	signal.Notify(sigChan, syscall.SIGTERM)
+	signal.Notify(sigChan, syscall.SIGINT)
+
+	rawSig := <-sigChan
+	sig := rawSig.String()
+	c.l.WithField("signal", sig).Info("Caught signal, shutting down")
+	c.Stop()
+}
+
+// RebindUDPServer asks the UDP listener to rebind it's listener. Mainly used on mobile clients when interfaces change
+func (c *Control) RebindUDPServer() {
+	_ = c.f.outside.Rebind()
+
+	// Trigger a lighthouse update, useful for mobile clients that should have an update interval of 0
+	c.f.lightHouse.SendUpdate(c.f)
+
+	// Let the main interface know that we rebound so that underlying tunnels know to trigger punches from their remotes
+	c.f.rebindCount++
+}
+
+// ListHostmap returns details about the actual or pending (handshaking) hostmap
+func (c *Control) ListHostmap(pendingMap bool) []ControlHostInfo {
+	if pendingMap {
+		return listHostMap(c.f.handshakeManager.pendingHostMap)
+	} else {
+		return listHostMap(c.f.hostMap)
+	}
+}
+
+// GetHostInfoByVpnIp returns a single tunnels hostInfo, or nil if not found
+func (c *Control) GetHostInfoByVpnIp(vpnIp iputil.VpnIp, pending bool) *ControlHostInfo {
+	var hm *HostMap
+	if pending {
+		hm = c.f.handshakeManager.pendingHostMap
+	} else {
+		hm = c.f.hostMap
+	}
+
+	h, err := hm.QueryVpnIp(vpnIp)
+	if err != nil {
+		return nil
+	}
+
+	ch := copyHostInfo(h, c.f.hostMap.preferredRanges)
+	return &ch
+}
+
+// SetRemoteForTunnel forces a tunnel to use a specific remote
+func (c *Control) SetRemoteForTunnel(vpnIp iputil.VpnIp, addr udp.Addr) *ControlHostInfo {
+	hostInfo, err := c.f.hostMap.QueryVpnIp(vpnIp)
+	if err != nil {
+		return nil
+	}
+
+	hostInfo.SetRemote(addr.Copy())
+	ch := copyHostInfo(hostInfo, c.f.hostMap.preferredRanges)
+	return &ch
+}
+
+// CloseTunnel closes a fully established tunnel. If localOnly is false it will notify the remote end as well.
+func (c *Control) CloseTunnel(vpnIp iputil.VpnIp, localOnly bool) bool {
+	hostInfo, err := c.f.hostMap.QueryVpnIp(vpnIp)
+	if err != nil {
+		return false
+	}
+
+	if !localOnly {
+		c.f.send(
+			header.CloseTunnel,
+			0,
+			hostInfo.ConnectionState,
+			hostInfo,
+			[]byte{},
+			make([]byte, 12, 12),
+			make([]byte, mtu),
+		)
+	}
+
+	c.f.closeTunnel(hostInfo)
+	return true
+}
+
+// CloseAllTunnels is just like CloseTunnel except it goes through and shuts them all down, optionally you can avoid shutting down lighthouse tunnels
+// the int returned is a count of tunnels closed
+func (c *Control) CloseAllTunnels(excludeLighthouses bool) (closed int) {
+	//TODO: this is probably better as a function in ConnectionManager or HostMap directly
+	lighthouses := c.f.lightHouse.GetLighthouses()
+
+	shutdown := func(h *HostInfo) {
+		if excludeLighthouses {
+			if _, ok := lighthouses[h.vpnIp]; ok {
+				return
+			}
+		}
+		c.f.send(header.CloseTunnel, 0, h.ConnectionState, h, []byte{}, make([]byte, 12, 12), make([]byte, mtu))
+		c.f.closeTunnel(h)
+
+		c.l.WithField("vpnIp", h.vpnIp).WithField("udpAddr", h.remote).
+			Debug("Sending close tunnel message")
+		closed++
+	}
+
+	// Learn which hosts are being used as relays, so we can shut them down last.
+	relayingHosts := map[iputil.VpnIp]*HostInfo{}
+	// Grab the hostMap lock to access the Relays map
+	c.f.hostMap.Lock()
+	for _, relayingHost := range c.f.hostMap.Relays {
+		relayingHosts[relayingHost.vpnIp] = relayingHost
+	}
+	c.f.hostMap.Unlock()
+
+	hostInfos := []*HostInfo{}
+	// Grab the hostMap lock to access the Hosts map
+	c.f.hostMap.Lock()
+	for _, relayHost := range c.f.hostMap.Hosts {
+		if _, ok := relayingHosts[relayHost.vpnIp]; !ok {
+			hostInfos = append(hostInfos, relayHost)
+		}
+	}
+	c.f.hostMap.Unlock()
+
+	for _, h := range hostInfos {
+		shutdown(h)
+	}
+	for _, h := range relayingHosts {
+		shutdown(h)
+	}
+	return
+}
+
+func copyHostInfo(h *HostInfo, preferredRanges []*net.IPNet) ControlHostInfo {
+
+	chi := ControlHostInfo{
+		VpnIp:                  h.vpnIp.ToIP(),
+		LocalIndex:             h.localIndexId,
+		RemoteIndex:            h.remoteIndexId,
+		RemoteAddrs:            h.remotes.CopyAddrs(preferredRanges),
+		CachedPackets:          len(h.packetStore),
+		CurrentRelaysToMe:      h.relayState.CopyRelayIps(),
+		CurrentRelaysThroughMe: h.relayState.CopyRelayForIps(),
+	}
+
+	if h.ConnectionState != nil {
+		chi.MessageCounter = atomic.LoadUint64(&h.ConnectionState.atomicMessageCounter)
+	}
+
+	if c := h.GetCert(); c != nil {
+		chi.Cert = c.Copy()
+	}
+
+	if h.remote != nil {
+		chi.CurrentRemote = h.remote.Copy()
+	}
+
+	return chi
+}
+
+func listHostMap(hm *HostMap) []ControlHostInfo {
+	hm.RLock()
+	hosts := make([]ControlHostInfo, len(hm.Hosts))
+	i := 0
+	for _, v := range hm.Hosts {
+		hosts[i] = copyHostInfo(v, hm.preferredRanges)
+		i++
+	}
+	hm.RUnlock()
+
+	return hosts
+}

control_test.go

@@ -0,0 +1,125 @@
+package nebula
+
+import (
+	"net"
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/sirupsen/logrus"
+	"github.com/slackhq/nebula/cert"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/test"
+	"github.com/slackhq/nebula/udp"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestControl_GetHostInfoByVpnIp(t *testing.T) {
+	l := test.NewLogger()
+	// Special care must be taken to re-use all objects provided to the hostmap and certificate in the expectedInfo object
+	// To properly ensure we are not exposing core memory to the caller
+	hm := NewHostMap(l, "test", &net.IPNet{}, make([]*net.IPNet, 0))
+	remote1 := udp.NewAddr(net.ParseIP("0.0.0.100"), 4444)
+	remote2 := udp.NewAddr(net.ParseIP("1:2:3:4:5:6:7:8"), 4444)
+	ipNet := net.IPNet{
+		IP:   net.IPv4(1, 2, 3, 4),
+		Mask: net.IPMask{255, 255, 255, 0},
+	}
+
+	ipNet2 := net.IPNet{
+		IP:   net.ParseIP("1:2:3:4:5:6:7:8"),
+		Mask: net.IPMask{255, 255, 255, 0},
+	}
+
+	crt := &cert.NebulaCertificate{
+		Details: cert.NebulaCertificateDetails{
+			Name:           "test",
+			Ips:            []*net.IPNet{&ipNet},
+			Subnets:        []*net.IPNet{},
+			Groups:         []string{"default-group"},
+			NotBefore:      time.Unix(1, 0),
+			NotAfter:       time.Unix(2, 0),
+			PublicKey:      []byte{5, 6, 7, 8},
+			IsCA:           false,
+			Issuer:         "the-issuer",
+			InvertedGroups: map[string]struct{}{"default-group": {}},
+		},
+		Signature: []byte{1, 2, 1, 2, 1, 3},
+	}
+
+	remotes := NewRemoteList()
+	remotes.unlockedPrependV4(0, NewIp4AndPort(remote1.IP, uint32(remote1.Port)))
+	remotes.unlockedPrependV6(0, NewIp6AndPort(remote2.IP, uint32(remote2.Port)))
+	hm.Add(iputil.Ip2VpnIp(ipNet.IP), &HostInfo{
+		remote:  remote1,
+		remotes: remotes,
+		ConnectionState: &ConnectionState{
+			peerCert: crt,
+		},
+		remoteIndexId: 200,
+		localIndexId:  201,
+		vpnIp:         iputil.Ip2VpnIp(ipNet.IP),
+		relayState: RelayState{
+			relays:        map[iputil.VpnIp]struct{}{},
+			relayForByIp:  map[iputil.VpnIp]*Relay{},
+			relayForByIdx: map[uint32]*Relay{},
+		},
+	})
+
+	hm.Add(iputil.Ip2VpnIp(ipNet2.IP), &HostInfo{
+		remote:  remote1,
+		remotes: remotes,
+		ConnectionState: &ConnectionState{
+			peerCert: nil,
+		},
+		remoteIndexId: 200,
+		localIndexId:  201,
+		vpnIp:         iputil.Ip2VpnIp(ipNet2.IP),
+		relayState: RelayState{
+			relays:        map[iputil.VpnIp]struct{}{},
+			relayForByIp:  map[iputil.VpnIp]*Relay{},
+			relayForByIdx: map[uint32]*Relay{},
+		},
+	})
+
+	c := Control{
+		f: &Interface{
+			hostMap: hm,
+		},
+		l: logrus.New(),
+	}
+
+	thi := c.GetHostInfoByVpnIp(iputil.Ip2VpnIp(ipNet.IP), false)
+
+	expectedInfo := ControlHostInfo{
+		VpnIp:                  net.IPv4(1, 2, 3, 4).To4(),
+		LocalIndex:             201,
+		RemoteIndex:            200,
+		RemoteAddrs:            []*udp.Addr{remote2, remote1},
+		CachedPackets:          0,
+		Cert:                   crt.Copy(),
+		MessageCounter:         0,
+		CurrentRemote:          udp.NewAddr(net.ParseIP("0.0.0.100"), 4444),
+		CurrentRelaysToMe:      []iputil.VpnIp{},
+		CurrentRelaysThroughMe: []iputil.VpnIp{},
+	}
+
+	// Make sure we don't have any unexpected fields
+	assertFields(t, []string{"VpnIp", "LocalIndex", "RemoteIndex", "RemoteAddrs", "CachedPackets", "Cert", "MessageCounter", "CurrentRemote", "CurrentRelaysToMe", "CurrentRelaysThroughMe"}, thi)
+	test.AssertDeepCopyEqual(t, &expectedInfo, thi)
+
+	// Make sure we don't panic if the host info doesn't have a cert yet
+	assert.NotPanics(t, func() {
+		thi = c.GetHostInfoByVpnIp(iputil.Ip2VpnIp(ipNet2.IP), false)
+	})
+}
+
+func assertFields(t *testing.T, expected []string, actualStruct interface{}) {
+	val := reflect.ValueOf(actualStruct).Elem()
+	fields := make([]string, val.NumField())
+	for i := 0; i < val.NumField(); i++ {
+		fields[i] = val.Type().Field(i).Name
+	}
+
+	assert.Equal(t, expected, fields)
+}

control_tester.go

@@ -0,0 +1,155 @@
+//go:build e2e_testing
+// +build e2e_testing
+
+package nebula
+
+import (
+	"net"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+	"github.com/slackhq/nebula/header"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/overlay"
+	"github.com/slackhq/nebula/udp"
+)
+
+// WaitForTypeByIndex will pipe all messages from this control device into the pipeTo control device
+// returning after a message matching the criteria has been piped
+func (c *Control) WaitForType(msgType header.MessageType, subType header.MessageSubType, pipeTo *Control) {
+	h := &header.H{}
+	for {
+		p := c.f.outside.Get(true)
+		if err := h.Parse(p.Data); err != nil {
+			panic(err)
+		}
+		pipeTo.InjectUDPPacket(p)
+		if h.Type == msgType && h.Subtype == subType {
+			return
+		}
+	}
+}
+
+// WaitForTypeByIndex is similar to WaitForType except it adds an index check
+// Useful if you have many nodes communicating and want to wait to find a specific nodes packet
+func (c *Control) WaitForTypeByIndex(toIndex uint32, msgType header.MessageType, subType header.MessageSubType, pipeTo *Control) {
+	h := &header.H{}
+	for {
+		p := c.f.outside.Get(true)
+		if err := h.Parse(p.Data); err != nil {
+			panic(err)
+		}
+		pipeTo.InjectUDPPacket(p)
+		if h.RemoteIndex == toIndex && h.Type == msgType && h.Subtype == subType {
+			return
+		}
+	}
+}
+
+// InjectLightHouseAddr will push toAddr into the local lighthouse cache for the vpnIp
+// This is necessary if you did not configure static hosts or are not running a lighthouse
+func (c *Control) InjectLightHouseAddr(vpnIp net.IP, toAddr *net.UDPAddr) {
+	c.f.lightHouse.Lock()
+	remoteList := c.f.lightHouse.unlockedGetRemoteList(iputil.Ip2VpnIp(vpnIp))
+	remoteList.Lock()
+	defer remoteList.Unlock()
+	c.f.lightHouse.Unlock()
+
+	iVpnIp := iputil.Ip2VpnIp(vpnIp)
+	if v4 := toAddr.IP.To4(); v4 != nil {
+		remoteList.unlockedPrependV4(iVpnIp, NewIp4AndPort(v4, uint32(toAddr.Port)))
+	} else {
+		remoteList.unlockedPrependV6(iVpnIp, NewIp6AndPort(toAddr.IP, uint32(toAddr.Port)))
+	}
+}
+
+// InjectRelays will push relayVpnIps into the local lighthouse cache for the vpnIp
+// This is necessary to inform an initiator of possible relays for communicating with a responder
+func (c *Control) InjectRelays(vpnIp net.IP, relayVpnIps []net.IP) {
+	c.f.lightHouse.Lock()
+	remoteList := c.f.lightHouse.unlockedGetRemoteList(iputil.Ip2VpnIp(vpnIp))
+	remoteList.Lock()
+	defer remoteList.Unlock()
+	c.f.lightHouse.Unlock()
+
+	iVpnIp := iputil.Ip2VpnIp(vpnIp)
+	uVpnIp := []uint32{}
+	for _, rVPnIp := range relayVpnIps {
+		uVpnIp = append(uVpnIp, uint32(iputil.Ip2VpnIp(rVPnIp)))
+	}
+
+	remoteList.unlockedSetRelay(iVpnIp, iVpnIp, uVpnIp)
+}
+
+// GetFromTun will pull a packet off the tun side of nebula
+func (c *Control) GetFromTun(block bool) []byte {
+	return c.f.inside.(*overlay.TestTun).Get(block)
+}
+
+// GetFromUDP will pull a udp packet off the udp side of nebula
+func (c *Control) GetFromUDP(block bool) *udp.Packet {
+	return c.f.outside.Get(block)
+}
+
+func (c *Control) GetUDPTxChan() <-chan *udp.Packet {
+	return c.f.outside.TxPackets
+}
+
+func (c *Control) GetTunTxChan() <-chan []byte {
+	return c.f.inside.(*overlay.TestTun).TxPackets
+}
+
+// InjectUDPPacket will inject a packet into the udp side of nebula
+func (c *Control) InjectUDPPacket(p *udp.Packet) {
+	c.f.outside.Send(p)
+}
+
+// InjectTunUDPPacket puts a udp packet on the tun interface. Using UDP here because it's a simpler protocol
+func (c *Control) InjectTunUDPPacket(toIp net.IP, toPort uint16, fromPort uint16, data []byte) {
+	ip := layers.IPv4{
+		Version:  4,
+		TTL:      64,
+		Protocol: layers.IPProtocolUDP,
+		SrcIP:    c.f.inside.Cidr().IP,
+		DstIP:    toIp,
+	}
+
+	udp := layers.UDP{
+		SrcPort: layers.UDPPort(fromPort),
+		DstPort: layers.UDPPort(toPort),
+	}
+	err := udp.SetNetworkLayerForChecksum(&ip)
+	if err != nil {
+		panic(err)
+	}
+
+	buffer := gopacket.NewSerializeBuffer()
+	opt := gopacket.SerializeOptions{
+		ComputeChecksums: true,
+		FixLengths:       true,
+	}
+	err = gopacket.SerializeLayers(buffer, opt, &ip, &udp, gopacket.Payload(data))
+	if err != nil {
+		panic(err)
+	}
+
+	c.f.inside.(*overlay.TestTun).Send(buffer.Bytes())
+}
+
+func (c *Control) GetVpnIp() iputil.VpnIp {
+	return c.f.myVpnIp
+}
+
+func (c *Control) GetUDPAddr() string {
+	return c.f.outside.Addr.String()
+}
+
+func (c *Control) KillPendingTunnel(vpnIp net.IP) bool {
+	hostinfo, ok := c.f.handshakeManager.pendingHostMap.Hosts[iputil.Ip2VpnIp(vpnIp)]
+	if !ok {
+		return false
+	}
+
+	c.f.handshakeManager.pendingHostMap.DeleteHostInfo(hostinfo)
+	return true
+}

dist/arch/nebula.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=nebula
+Wants=basic.target network-online.target
+After=basic.target network.target network-online.target
+
+[Service]
+SyslogIdentifier=nebula
+ExecReload=/bin/kill -HUP $MAINPID
+ExecStart=/usr/bin/nebula -config /etc/nebula/config.yml
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

dist/fedora/nebula.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=Nebula overlay networking tool
+
+After=basic.target network.target network-online.target
+Before=sshd.service
+Wants=basic.target network-online.target
+
+[Service]
+ExecReload=/bin/kill -HUP $MAINPID
+ExecStart=/usr/bin/nebula -config /etc/nebula/config.yml
+Restart=always
+SyslogIdentifier=nebula
+
+[Install]
+WantedBy=multi-user.target

dist/windows/wintun/LICENSE.txt

@@ -0,0 +1,84 @@
+Prebuilt Binaries License
+-------------------------
+
+1. DEFINITIONS. "Software" means the precise contents of the "wintun.dll"
+   files that are included in the .zip file that contains this document as
+   downloaded from wintun.net/builds.
+
+2. LICENSE GRANT. WireGuard LLC grants to you a non-exclusive and
+   non-transferable right to use Software for lawful purposes under certain
+   obligations and limited rights as set forth in this agreement.
+
+3. RESTRICTIONS. Software is owned and copyrighted by WireGuard LLC. It is
+   licensed, not sold. Title to Software and all associated intellectual
+   property rights are retained by WireGuard. You must not:
+   a. reverse engineer, decompile, disassemble, extract from, or otherwise
+      modify the Software;
+   b. modify or create derivative work based upon Software in whole or in
+      parts, except insofar as only the API interfaces of the "wintun.h" file
+      distributed alongside the Software (the "Permitted API") are used;
+   c. remove any proprietary notices, labels, or copyrights from the Software;
+   d. resell, redistribute, lease, rent, transfer, sublicense, or otherwise
+      transfer rights of the Software without the prior written consent of
+      WireGuard LLC, except insofar as the Software is distributed alongside
+      other software that uses the Software only via the Permitted API;
+   e. use the name of WireGuard LLC, the WireGuard project, the Wintun
+      project, or the names of its contributors to endorse or promote products
+      derived from the Software without specific prior written consent.
+
+4. LIMITED WARRANTY. THE SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF
+   ANY KIND. WIREGUARD LLC HEREBY EXCLUDES AND DISCLAIMS ALL IMPLIED OR
+   STATUTORY WARRANTIES, INCLUDING ANY WARRANTIES OF MERCHANTABILITY, FITNESS
+   FOR A PARTICULAR PURPOSE, QUALITY, NON-INFRINGEMENT, TITLE, RESULTS,
+   EFFORTS, OR QUIET ENJOYMENT. THERE IS NO WARRANTY THAT THE PRODUCT WILL BE
+   ERROR-FREE OR WILL FUNCTION WITHOUT INTERRUPTION. YOU ASSUME THE ENTIRE
+   RISK FOR THE RESULTS OBTAINED USING THE PRODUCT. TO THE EXTENT THAT
+   WIREGUARD LLC MAY NOT DISCLAIM ANY WARRANTY AS A MATTER OF APPLICABLE LAW,
+   THE SCOPE AND DURATION OF SUCH WARRANTY WILL BE THE MINIMUM PERMITTED UNDER
+   SUCH LAW. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
+   WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR
+   A PARTICULAR PURPOSE OR NON-INFRINGEMENT ARE DISCLAIMED, EXCEPT TO THE
+   EXTENT THAT THESE DISCLAIMERS ARE HELD TO BE LEGALLY INVALID.
+
+5. LIMITATION OF LIABILITY. To the extent not prohibited by law, in no event
+   WireGuard LLC or any third-party-developer will be liable for any lost
+   revenue, profit or data or for special, indirect, consequential, incidental
+   or punitive damages, however caused regardless of the theory of liability,
+   arising out of or related to the use of or inability to use Software, even
+   if WireGuard LLC has been advised of the possibility of such damages.
+   Solely you are responsible for determining the appropriateness of using
+   Software and accept full responsibility for all risks associated with its
+   exercise of rights under this agreement, including but not limited to the
+   risks and costs of program errors, compliance with applicable laws, damage
+   to or loss of data, programs or equipment, and unavailability or
+   interruption of operations. The foregoing limitations will apply even if
+   the above stated warranty fails of its essential purpose. You acknowledge,
+   that it is in the nature of software that software is complex and not
+   completely free of errors. In no event shall WireGuard LLC or any
+   third-party-developer be liable to you under any theory for any damages
+   suffered by you or any user of Software or for any special, incidental,
+   indirect, consequential or similar damages (including without limitation
+   damages for loss of business profits, business interruption, loss of
+   business information or any other pecuniary loss) arising out of the use or
+   inability to use Software, even if WireGuard LLC has been advised of the
+   possibility of such damages and regardless of the legal or quitable theory
+   (contract, tort, or otherwise) upon which the claim is based.
+
+6. TERMINATION. This agreement is affected until terminated. You may
+   terminate this agreement at any time. This agreement will terminate
+   immediately without notice from WireGuard LLC if you fail to comply with
+   the terms and conditions of this agreement. Upon termination, you must
+   delete Software and all copies of Software and cease all forms of
+   distribution of Software.
+
+7. SEVERABILITY. If any provision of this agreement is held to be
+   unenforceable, this agreement will remain in effect with the provision
+   omitted, unless omission would frustrate the intent of the parties, in
+   which case this agreement will immediately terminate.
+
+8. RESERVATION OF RIGHTS. All rights not expressly granted in this agreement
+   are reserved by WireGuard LLC. For example, WireGuard LLC reserves the
+   right at any time to cease development of Software, to alter distribution
+   details, features, specifications, capabilities, functions, licensing
+   terms, release dates, APIs, ABIs, general availability, or other
+   characteristics of the Software.

dist/windows/wintun/README.md

@@ -0,0 +1,339 @@
+# [Wintun Network Adapter](https://www.wintun.net/)
+### TUN Device Driver for Windows
+
+This is a layer 3 TUN driver for Windows 7, 8, 8.1, and 10. Originally created for [WireGuard](https://www.wireguard.com/), it is intended to be useful to a wide variety of projects that require layer 3 tunneling devices with implementations primarily in userspace.
+
+## Installation
+
+Wintun is deployed as a platform-specific `wintun.dll` file. Install the `wintun.dll` file side-by-side with your application. Download the dll from [wintun.net](https://www.wintun.net/), alongside the header file for your application described below.
+
+## Usage
+
+Include the [`wintun.h` file](https://git.zx2c4.com/wintun/tree/api/wintun.h) in your project simply by copying it there and dynamically load the `wintun.dll` using [`LoadLibraryEx()`](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexa) and [`GetProcAddress()`](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getprocaddress) to resolve each function, using the typedefs provided in the header file. The [`InitializeWintun` function in the example.c code](https://git.zx2c4.com/wintun/tree/example/example.c) provides this in a function that you can simply copy and paste.
+
+With the library setup, Wintun can then be used by first creating an adapter, configuring it, and then setting its status to "up". Adapters have names (e.g. "OfficeNet") and types (e.g. "Wintun").
+
+```C
+WINTUN_ADAPTER_HANDLE Adapter1 = WintunCreateAdapter(L"OfficeNet", L"Wintun", &SomeFixedGUID1);
+WINTUN_ADAPTER_HANDLE Adapter2 = WintunCreateAdapter(L"HomeNet", L"Wintun", &SomeFixedGUID2);
+WINTUN_ADAPTER_HANDLE Adapter3 = WintunCreateAdapter(L"Data Center", L"Wintun", &SomeFixedGUID3);
+```
+
+After creating an adapter, we can use it by starting a session:
+
+```C
+WINTUN_SESSION_HANDLE Session = WintunStartSession(Adapter2, 0x400000);
+```
+
+Then, the `WintunAllocateSendPacket` and `WintunSendPacket` functions can be used for sending packets ([used by `SendPackets` in the example.c code](https://git.zx2c4.com/wintun/tree/example/example.c)):
+
+```C
+BYTE *OutgoingPacket = WintunAllocateSendPacket(Session, PacketDataSize);
+if (OutgoingPacket)
+{
+    memcpy(OutgoingPacket, PacketData, PacketDataSize);
+    WintunSendPacket(Session, OutgoingPacket);
+}
+else if (GetLastError() != ERROR_BUFFER_OVERFLOW) // Silently drop packets if the ring is full
+    Log(L"Packet write failed");
+```
+
+And the `WintunReceivePacket` and `WintunReleaseReceivePacket` functions can be used for receiving packets ([used by `ReceivePackets` in the example.c code](https://git.zx2c4.com/wintun/tree/example/example.c)):
+
+```C
+for (;;)
+{
+    DWORD IncomingPacketSize;
+    BYTE *IncomingPacket = WintunReceivePacket(Session, &IncomingPacketSize);
+    if (IncomingPacket)
+    {
+        DoSomethingWithPacket(IncomingPacket, IncomingPacketSize);
+        WintunReleaseReceivePacket(Session, IncomingPacket);
+    }
+    else if (GetLastError() == ERROR_NO_MORE_ITEMS)
+        WaitForSingleObject(WintunGetReadWaitEvent(Session), INFINITE);
+    else
+    {
+        Log(L"Packet read failed");
+        break;
+    }
+}
+```
+
+Some high performance use cases may want to spin on `WintunReceivePackets` for a number of cycles before falling back to waiting on the read-wait event.
+
+You are **highly encouraged** to read the [**example.c short example**](https://git.zx2c4.com/wintun/tree/example/example.c) to see how to put together a simple userspace network tunnel.
+
+The various functions and definitions are [documented in the reference below](#Reference).
+
+## Reference
+
+### Macro Definitions
+
+#### WINTUN\_MAX\_POOL
+
+`#define WINTUN_MAX_POOL   256`
+
+Maximum pool name length including zero terminator
+
+#### WINTUN\_MIN\_RING\_CAPACITY
+
+`#define WINTUN_MIN_RING_CAPACITY   0x20000 /* 128kiB */`
+
+Minimum ring capacity.
+
+#### WINTUN\_MAX\_RING\_CAPACITY
+
+`#define WINTUN_MAX_RING_CAPACITY   0x4000000 /* 64MiB */`
+
+Maximum ring capacity.
+
+#### WINTUN\_MAX\_IP\_PACKET\_SIZE
+
+`#define WINTUN_MAX_IP_PACKET_SIZE   0xFFFF`
+
+Maximum IP packet size
+
+### Typedefs
+
+#### WINTUN\_ADAPTER\_HANDLE
+
+`typedef void* WINTUN_ADAPTER_HANDLE`
+
+A handle representing Wintun adapter
+
+#### WINTUN\_ENUM\_CALLBACK
+
+`typedef BOOL(* WINTUN_ENUM_CALLBACK) (WINTUN_ADAPTER_HANDLE Adapter, LPARAM Param)`
+
+Called by WintunEnumAdapters for each adapter in the pool.
+
+**Parameters**
+
+- *Adapter*: Adapter handle, which will be freed when this function returns.
+- *Param*: An application-defined value passed to the WintunEnumAdapters.
+
+**Returns**
+
+Non-zero to continue iterating adapters; zero to stop.
+
+#### WINTUN\_LOGGER\_CALLBACK
+
+`typedef void(* WINTUN_LOGGER_CALLBACK) (WINTUN_LOGGER_LEVEL Level, DWORD64 Timestamp, const WCHAR *Message)`
+
+Called by internal logger to report diagnostic messages
+
+**Parameters**
+
+- *Level*: Message level.
+- *Timestamp*: Message timestamp in in 100ns intervals since 1601-01-01 UTC.
+- *Message*: Message text.
+
+#### WINTUN\_SESSION\_HANDLE
+
+`typedef void* WINTUN_SESSION_HANDLE`
+
+A handle representing Wintun session
+
+### Enumeration Types
+
+#### WINTUN\_LOGGER\_LEVEL
+
+`enum WINTUN_LOGGER_LEVEL`
+
+Determines the level of logging, passed to WINTUN\_LOGGER\_CALLBACK.
+
+- *WINTUN\_LOG\_INFO*: Informational
+- *WINTUN\_LOG\_WARN*: Warning
+- *WINTUN\_LOG\_ERR*: Error
+
+Enumerator
+
+### Functions
+
+#### WintunCreateAdapter()
+
+`WINTUN_ADAPTER_HANDLE WintunCreateAdapter (const WCHAR * Name, const WCHAR * TunnelType, const GUID * RequestedGUID)`
+
+Creates a new Wintun adapter.
+
+**Parameters**
+
+- *Name*: The requested name of the adapter. Zero-terminated string of up to MAX\_ADAPTER\_NAME-1 characters.
+- *Name*: Name of the adapter tunnel type. Zero-terminated string of up to MAX\_ADAPTER\_NAME-1 characters.
+- *RequestedGUID*: The GUID of the created network adapter, which then influences NLA generation deterministically. If it is set to NULL, the GUID is chosen by the system at random, and hence a new NLA entry is created for each new adapter. It is called "requested" GUID because the API it uses is completely undocumented, and so there could be minor interesting complications with its usage.
+
+**Returns**
+
+If the function succeeds, the return value is the adapter handle. Must be released with WintunCloseAdapter. If the function fails, the return value is NULL. To get extended error information, call GetLastError.
+
+#### WintunOpenAdapter()
+
+`WINTUN_ADAPTER_HANDLE WintunOpenAdapter (const WCHAR * Name)`
+
+Opens an existing Wintun adapter.
+
+**Parameters**
+
+- *Name*: The requested name of the adapter. Zero-terminated string of up to MAX\_ADAPTER\_NAME-1 characters.
+
+**Returns**
+
+If the function succeeds, the return value is adapter handle. Must be released with WintunCloseAdapter. If the function fails, the return value is NULL. To get extended error information, call GetLastError.
+
+#### WintunCloseAdapter()
+
+`void WintunCloseAdapter (WINTUN_ADAPTER_HANDLE Adapter)`
+
+Releases Wintun adapter resources and, if adapter was created with WintunCreateAdapter, removes adapter.
+
+**Parameters**
+
+- *Adapter*: Adapter handle obtained with WintunCreateAdapter or WintunOpenAdapter.
+
+#### WintunDeleteDriver()
+
+`BOOL WintunDeleteDriver ()`
+
+Deletes the Wintun driver if there are no more adapters in use.
+
+**Returns**
+
+If the function succeeds, the return value is nonzero. If the function fails, the return value is zero. To get extended error information, call GetLastError.
+
+#### WintunGetAdapterLuid()
+
+`void WintunGetAdapterLuid (WINTUN_ADAPTER_HANDLE Adapter, NET_LUID * Luid)`
+
+Returns the LUID of the adapter.
+
+**Parameters**
+
+- *Adapter*: Adapter handle obtained with WintunOpenAdapter or WintunCreateAdapter
+- *Luid*: Pointer to LUID to receive adapter LUID.
+
+#### WintunGetRunningDriverVersion()
+
+`DWORD WintunGetRunningDriverVersion (void )`
+
+Determines the version of the Wintun driver currently loaded.
+
+**Returns**
+
+If the function succeeds, the return value is the version number. If the function fails, the return value is zero. To get extended error information, call GetLastError. Possible errors include the following: ERROR\_FILE\_NOT\_FOUND Wintun not loaded
+
+#### WintunSetLogger()
+
+`void WintunSetLogger (WINTUN_LOGGER_CALLBACK NewLogger)`
+
+Sets logger callback function.
+
+**Parameters**
+
+- *NewLogger*: Pointer to callback function to use as a new global logger. NewLogger may be called from various threads concurrently. Should the logging require serialization, you must handle serialization in NewLogger. Set to NULL to disable.
+
+#### WintunStartSession()
+
+`WINTUN_SESSION_HANDLE WintunStartSession (WINTUN_ADAPTER_HANDLE Adapter, DWORD Capacity)`
+
+Starts Wintun session.
+
+**Parameters**
+
+- *Adapter*: Adapter handle obtained with WintunOpenAdapter or WintunCreateAdapter
+- *Capacity*: Rings capacity. Must be between WINTUN\_MIN\_RING\_CAPACITY and WINTUN\_MAX\_RING\_CAPACITY (incl.) Must be a power of two.
+
+**Returns**
+
+Wintun session handle. Must be released with WintunEndSession. If the function fails, the return value is NULL. To get extended error information, call GetLastError.
+
+#### WintunEndSession()
+
+`void WintunEndSession (WINTUN_SESSION_HANDLE Session)`
+
+Ends Wintun session.
+
+**Parameters**
+
+- *Session*: Wintun session handle obtained with WintunStartSession
+
+#### WintunGetReadWaitEvent()
+
+`HANDLE WintunGetReadWaitEvent (WINTUN_SESSION_HANDLE Session)`
+
+Gets Wintun session's read-wait event handle.
+
+**Parameters**
+
+- *Session*: Wintun session handle obtained with WintunStartSession
+
+**Returns**
+
+Pointer to receive event handle to wait for available data when reading. Should WintunReceivePackets return ERROR\_NO\_MORE\_ITEMS (after spinning on it for a while under heavy load), wait for this event to become signaled before retrying WintunReceivePackets. Do not call CloseHandle on this event - it is managed by the session.
+
+#### WintunReceivePacket()
+
+`BYTE* WintunReceivePacket (WINTUN_SESSION_HANDLE Session, DWORD * PacketSize)`
+
+Retrieves one or packet. After the packet content is consumed, call WintunReleaseReceivePacket with Packet returned from this function to release internal buffer. This function is thread-safe.
+
+**Parameters**
+
+- *Session*: Wintun session handle obtained with WintunStartSession
+- *PacketSize*: Pointer to receive packet size.
+
+**Returns**
+
+Pointer to layer 3 IPv4 or IPv6 packet. Client may modify its content at will. If the function fails, the return value is NULL. To get extended error information, call GetLastError. Possible errors include the following: ERROR\_HANDLE\_EOF Wintun adapter is terminating; ERROR\_NO\_MORE\_ITEMS Wintun buffer is exhausted; ERROR\_INVALID\_DATA Wintun buffer is corrupt
+
+#### WintunReleaseReceivePacket()
+
+`void WintunReleaseReceivePacket (WINTUN_SESSION_HANDLE Session, const BYTE * Packet)`
+
+Releases internal buffer after the received packet has been processed by the client. This function is thread-safe.
+
+**Parameters**
+
+- *Session*: Wintun session handle obtained with WintunStartSession
+- *Packet*: Packet obtained with WintunReceivePacket
+
+#### WintunAllocateSendPacket()
+
+`BYTE* WintunAllocateSendPacket (WINTUN_SESSION_HANDLE Session, DWORD PacketSize)`
+
+Allocates memory for a packet to send. After the memory is filled with packet data, call WintunSendPacket to send and release internal buffer. WintunAllocateSendPacket is thread-safe and the WintunAllocateSendPacket order of calls define the packet sending order.
+
+**Parameters**
+
+- *Session*: Wintun session handle obtained with WintunStartSession
+- *PacketSize*: Exact packet size. Must be less or equal to WINTUN\_MAX\_IP\_PACKET\_SIZE.
+
+**Returns**
+
+Returns pointer to memory where to prepare layer 3 IPv4 or IPv6 packet for sending. If the function fails, the return value is NULL. To get extended error information, call GetLastError. Possible errors include the following: ERROR\_HANDLE\_EOF Wintun adapter is terminating; ERROR\_BUFFER\_OVERFLOW Wintun buffer is full;
+
+#### WintunSendPacket()
+
+`void WintunSendPacket (WINTUN_SESSION_HANDLE Session, const BYTE * Packet)`
+
+Sends the packet and releases internal buffer. WintunSendPacket is thread-safe, but the WintunAllocateSendPacket order of calls define the packet sending order. This means the packet is not guaranteed to be sent in the WintunSendPacket yet.
+
+**Parameters**
+
+- *Session*: Wintun session handle obtained with WintunStartSession
+- *Packet*: Packet obtained with WintunAllocateSendPacket
+
+## Building
+
+**Do not distribute drivers or files named "Wintun", as they will most certainly clash with official deployments. Instead distribute [`wintun.dll` as downloaded from wintun.net](https://www.wintun.net).**
+
+General requirements:
+
+- [Visual Studio 2019](https://visualstudio.microsoft.com/downloads/) with Windows SDK
+- [Windows Driver Kit](https://docs.microsoft.com/en-us/windows-hardware/drivers/download-the-wdk)
+
+`wintun.sln` may be opened in Visual Studio for development and building. Be sure to run `bcdedit /set testsigning on` and then reboot before to enable unsigned driver loading. The default run sequence (F5) in Visual Studio will build the example project and its dependencies.
+
+## License
+
+The entire contents of [the repository](https://git.zx2c4.com/wintun/), including all documentation and example code, is "Copyright © 2018-2021 WireGuard LLC. All Rights Reserved." Source code is licensed under the [GPLv2](COPYING). Prebuilt binaries from [wintun.net](https://www.wintun.net/) are released under a more permissive license suitable for more forms of software contained inside of the .zip files distributed there.

dist/windows/wintun/include/wintun.h

@@ -0,0 +1,270 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT
+ *
+ * Copyright (C) 2018-2021 WireGuard LLC. All Rights Reserved.
+ */
+
+#pragma once
+
+#include <winsock2.h>
+#include <windows.h>
+#include <ipexport.h>
+#include <ifdef.h>
+#include <ws2ipdef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef ALIGNED
+#    if defined(_MSC_VER)
+#        define ALIGNED(n) __declspec(align(n))
+#    elif defined(__GNUC__)
+#        define ALIGNED(n) __attribute__((aligned(n)))
+#    else
+#        error "Unable to define ALIGNED"
+#    endif
+#endif
+
+/* MinGW is missing this one, unfortunately. */
+#ifndef _Post_maybenull_
+#    define _Post_maybenull_
+#endif
+
+#pragma warning(push)
+#pragma warning(disable : 4324) /* structure was padded due to alignment specifier */
+
+/**
+ * A handle representing Wintun adapter
+ */
+typedef struct _WINTUN_ADAPTER *WINTUN_ADAPTER_HANDLE;
+
+/**
+ * Creates a new Wintun adapter.
+ *
+ * @param Name          The requested name of the adapter. Zero-terminated string of up to MAX_ADAPTER_NAME-1
+ *                      characters.
+ *
+ * @param TunnelType    Name of the adapter tunnel type. Zero-terminated string of up to MAX_ADAPTER_NAME-1
+ *                      characters.
+ *
+ * @param RequestedGUID The GUID of the created network adapter, which then influences NLA generation deterministically.
+ *                      If it is set to NULL, the GUID is chosen by the system at random, and hence a new NLA entry is
+ *                      created for each new adapter. It is called "requested" GUID because the API it uses is
+ *                      completely undocumented, and so there could be minor interesting complications with its usage.
+ *
+ * @return If the function succeeds, the return value is the adapter handle. Must be released with
+ * WintunCloseAdapter. If the function fails, the return value is NULL. To get extended error information, call
+ * GetLastError.
+ */
+typedef _Must_inspect_result_
+_Return_type_success_(return != NULL)
+_Post_maybenull_
+WINTUN_ADAPTER_HANDLE(WINAPI WINTUN_CREATE_ADAPTER_FUNC)
+(_In_z_ LPCWSTR Name, _In_z_ LPCWSTR TunnelType, _In_opt_ const GUID *RequestedGUID);
+
+/**
+ * Opens an existing Wintun adapter.
+ *
+ * @param Name          The requested name of the adapter. Zero-terminated string of up to MAX_ADAPTER_NAME-1
+ *                      characters.
+ *
+ * @return If the function succeeds, the return value is the adapter handle. Must be released with
+ * WintunCloseAdapter. If the function fails, the return value is NULL. To get extended error information, call
+ * GetLastError.
+ */
+typedef _Must_inspect_result_
+_Return_type_success_(return != NULL)
+_Post_maybenull_
+WINTUN_ADAPTER_HANDLE(WINAPI WINTUN_OPEN_ADAPTER_FUNC)(_In_z_ LPCWSTR Name);
+
+/**
+ * Releases Wintun adapter resources and, if adapter was created with WintunCreateAdapter, removes adapter.
+ *
+ * @param Adapter       Adapter handle obtained with WintunCreateAdapter or WintunOpenAdapter.
+ */
+typedef VOID(WINAPI WINTUN_CLOSE_ADAPTER_FUNC)(_In_opt_ WINTUN_ADAPTER_HANDLE Adapter);
+
+/**
+ * Deletes the Wintun driver if there are no more adapters in use.
+ *
+ * @return If the function succeeds, the return value is nonzero. If the function fails, the return value is zero. To
+ *         get extended error information, call GetLastError.
+ */
+typedef _Return_type_success_(return != FALSE)
+BOOL(WINAPI WINTUN_DELETE_DRIVER_FUNC)(VOID);
+
+/**
+ * Returns the LUID of the adapter.
+ *
+ * @param Adapter       Adapter handle obtained with WintunCreateAdapter or WintunOpenAdapter
+ *
+ * @param Luid          Pointer to LUID to receive adapter LUID.
+ */
+typedef VOID(WINAPI WINTUN_GET_ADAPTER_LUID_FUNC)(_In_ WINTUN_ADAPTER_HANDLE Adapter, _Out_ NET_LUID *Luid);
+
+/**
+ * Determines the version of the Wintun driver currently loaded.
+ *
+ * @return If the function succeeds, the return value is the version number. If the function fails, the return value is
+ *         zero. To get extended error information, call GetLastError. Possible errors include the following:
+ *         ERROR_FILE_NOT_FOUND  Wintun not loaded
+ */
+typedef _Return_type_success_(return != 0)
+DWORD(WINAPI WINTUN_GET_RUNNING_DRIVER_VERSION_FUNC)(VOID);
+
+/**
+ * Determines the level of logging, passed to WINTUN_LOGGER_CALLBACK.
+ */
+typedef enum
+{
+    WINTUN_LOG_INFO, /**< Informational */
+    WINTUN_LOG_WARN, /**< Warning */
+    WINTUN_LOG_ERR   /**< Error */
+} WINTUN_LOGGER_LEVEL;
+
+/**
+ * Called by internal logger to report diagnostic messages
+ *
+ * @param Level         Message level.
+ *
+ * @param Timestamp     Message timestamp in in 100ns intervals since 1601-01-01 UTC.
+ *
+ * @param Message       Message text.
+ */
+typedef VOID(CALLBACK *WINTUN_LOGGER_CALLBACK)(
+    _In_ WINTUN_LOGGER_LEVEL Level,
+    _In_ DWORD64 Timestamp,
+    _In_z_ LPCWSTR Message);
+
+/**
+ * Sets logger callback function.
+ *
+ * @param NewLogger     Pointer to callback function to use as a new global logger. NewLogger may be called from various
+ *                      threads concurrently. Should the logging require serialization, you must handle serialization in
+ *                      NewLogger. Set to NULL to disable.
+ */
+typedef VOID(WINAPI WINTUN_SET_LOGGER_FUNC)(_In_ WINTUN_LOGGER_CALLBACK NewLogger);
+
+/**
+ * Minimum ring capacity.
+ */
+#define WINTUN_MIN_RING_CAPACITY 0x20000 /* 128kiB */
+
+/**
+ * Maximum ring capacity.
+ */
+#define WINTUN_MAX_RING_CAPACITY 0x4000000 /* 64MiB */
+
+/**
+ * A handle representing Wintun session
+ */
+typedef struct _TUN_SESSION *WINTUN_SESSION_HANDLE;
+
+/**
+ * Starts Wintun session.
+ *
+ * @param Adapter       Adapter handle obtained with WintunOpenAdapter or WintunCreateAdapter
+ *
+ * @param Capacity      Rings capacity. Must be between WINTUN_MIN_RING_CAPACITY and WINTUN_MAX_RING_CAPACITY (incl.)
+ *                      Must be a power of two.
+ *
+ * @return Wintun session handle. Must be released with WintunEndSession. If the function fails, the return value is
+ *         NULL. To get extended error information, call GetLastError.
+ */
+typedef _Must_inspect_result_
+_Return_type_success_(return != NULL)
+_Post_maybenull_
+WINTUN_SESSION_HANDLE(WINAPI WINTUN_START_SESSION_FUNC)(_In_ WINTUN_ADAPTER_HANDLE Adapter, _In_ DWORD Capacity);
+
+/**
+ * Ends Wintun session.
+ *
+ * @param Session       Wintun session handle obtained with WintunStartSession
+ */
+typedef VOID(WINAPI WINTUN_END_SESSION_FUNC)(_In_ WINTUN_SESSION_HANDLE Session);
+
+/**
+ * Gets Wintun session's read-wait event handle.
+ *
+ * @param Session       Wintun session handle obtained with WintunStartSession
+ *
+ * @return Pointer to receive event handle to wait for available data when reading. Should
+ *         WintunReceivePackets return ERROR_NO_MORE_ITEMS (after spinning on it for a while under heavy
+ *         load), wait for this event to become signaled before retrying WintunReceivePackets. Do not call
+ *         CloseHandle on this event - it is managed by the session.
+ */
+typedef HANDLE(WINAPI WINTUN_GET_READ_WAIT_EVENT_FUNC)(_In_ WINTUN_SESSION_HANDLE Session);
+
+/**
+ * Maximum IP packet size
+ */
+#define WINTUN_MAX_IP_PACKET_SIZE 0xFFFF
+
+/**
+ * Retrieves one or packet. After the packet content is consumed, call WintunReleaseReceivePacket with Packet returned
+ * from this function to release internal buffer. This function is thread-safe.
+ *
+ * @param Session       Wintun session handle obtained with WintunStartSession
+ *
+ * @param PacketSize    Pointer to receive packet size.
+ *
+ * @return Pointer to layer 3 IPv4 or IPv6 packet. Client may modify its content at will. If the function fails, the
+ *         return value is NULL. To get extended error information, call GetLastError. Possible errors include the
+ *         following:
+ *         ERROR_HANDLE_EOF     Wintun adapter is terminating;
+ *         ERROR_NO_MORE_ITEMS  Wintun buffer is exhausted;
+ *         ERROR_INVALID_DATA   Wintun buffer is corrupt
+ */
+typedef _Must_inspect_result_
+_Return_type_success_(return != NULL)
+_Post_maybenull_
+_Post_writable_byte_size_(*PacketSize)
+BYTE *(WINAPI WINTUN_RECEIVE_PACKET_FUNC)(_In_ WINTUN_SESSION_HANDLE Session, _Out_ DWORD *PacketSize);
+
+/**
+ * Releases internal buffer after the received packet has been processed by the client. This function is thread-safe.
+ *
+ * @param Session       Wintun session handle obtained with WintunStartSession
+ *
+ * @param Packet        Packet obtained with WintunReceivePacket
+ */
+typedef VOID(
+    WINAPI WINTUN_RELEASE_RECEIVE_PACKET_FUNC)(_In_ WINTUN_SESSION_HANDLE Session, _In_ const BYTE *Packet);
+
+/**
+ * Allocates memory for a packet to send. After the memory is filled with packet data, call WintunSendPacket to send
+ * and release internal buffer. WintunAllocateSendPacket is thread-safe and the WintunAllocateSendPacket order of
+ * calls define the packet sending order.
+ *
+ * @param Session       Wintun session handle obtained with WintunStartSession
+ *
+ * @param PacketSize    Exact packet size. Must be less or equal to WINTUN_MAX_IP_PACKET_SIZE.
+ *
+ * @return Returns pointer to memory where to prepare layer 3 IPv4 or IPv6 packet for sending. If the function fails,
+ *         the return value is NULL. To get extended error information, call GetLastError. Possible errors include the
+ *         following:
+ *         ERROR_HANDLE_EOF       Wintun adapter is terminating;
+ *         ERROR_BUFFER_OVERFLOW  Wintun buffer is full;
+ */
+typedef _Must_inspect_result_
+_Return_type_success_(return != NULL)
+_Post_maybenull_
+_Post_writable_byte_size_(PacketSize)
+BYTE *(WINAPI WINTUN_ALLOCATE_SEND_PACKET_FUNC)(_In_ WINTUN_SESSION_HANDLE Session, _In_ DWORD PacketSize);
+
+/**
+ * Sends the packet and releases internal buffer. WintunSendPacket is thread-safe, but the WintunAllocateSendPacket
+ * order of calls define the packet sending order. This means the packet is not guaranteed to be sent in the
+ * WintunSendPacket yet.
+ *
+ * @param Session       Wintun session handle obtained with WintunStartSession
+ *
+ * @param Packet        Packet obtained with WintunAllocateSendPacket
+ */
+typedef VOID(WINAPI WINTUN_SEND_PACKET_FUNC)(_In_ WINTUN_SESSION_HANDLE Session, _In_ const BYTE *Packet);
+
+#pragma warning(pop)
+
+#ifdef __cplusplus
+}
+#endif

dist/wireshark/nebula.lua

@@ -0,0 +1,113 @@
+local nebula = Proto("nebula", "nebula")
+
+local default_settings = {
+    port      = 4242,
+    all_ports = false,
+}
+
+nebula.prefs.port  = Pref.uint("Port number", default_settings.port, "The UDP port number for Nebula")
+nebula.prefs.all_ports  = Pref.bool("All ports", default_settings.all_ports, "Assume nebula packets on any port, useful when dealing with hole punching")
+
+local pf_version  = ProtoField.new("version", "nebula.version", ftypes.UINT8, nil, base.DEC, 0xF0)
+local pf_type     = ProtoField.new("type", "nebula.type", ftypes.UINT8, {
+    [0] = "handshake",
+    [1] = "message",
+    [2] = "recvError",
+    [3] = "lightHouse",
+    [4] = "test",
+    [5] = "closeTunnel",
+}, base.DEC, 0x0F)
+
+local pf_subtype = ProtoField.new("subtype", "nebula.subtype", ftypes.UINT8, nil, base.DEC)
+local pf_subtype_test = ProtoField.new("subtype", "nebula.subtype", ftypes.UINT8, {
+    [0] = "request",
+    [1] = "reply",
+}, base.DEC)
+
+local pf_subtype_handshake = ProtoField.new("subtype", "nebula.subtype", ftypes.UINT8, {
+    [0] = "ix_psk0",
+}, base.DEC)
+
+local pf_reserved        = ProtoField.new("reserved",     "nebula.reserved",     ftypes.UINT16, nil, base.HEX)
+local pf_remote_index    = ProtoField.new("remote index", "nebula.remote_index", ftypes.UINT32, nil, base.DEC)
+local pf_message_counter = ProtoField.new("counter",      "nebula.counter",      ftypes.UINT64, nil, base.DEC)
+local pf_payload         = ProtoField.new("payload",      "nebula.payload",      ftypes.BYTES,  nil, base.NONE)
+
+nebula.fields = { pf_version, pf_type, pf_subtype, pf_subtype_handshake, pf_subtype_test, pf_reserved, pf_remote_index, pf_message_counter, pf_payload }
+
+local ef_holepunch = ProtoExpert.new("nebula.holepunch.expert", "Nebula hole punch packet", expert.group.PROTOCOL, expert.severity.NOTE)
+local ef_punchy = ProtoExpert.new("nebula.punchy.expert", "Nebula punchy keepalive packet", expert.group.PROTOCOL, expert.severity.NOTE)
+
+nebula.experts = { ef_holepunch, ef_punchy }
+local type_field = Field.new("nebula.type")
+local subtype_field = Field.new("nebula.subtype")
+
+function nebula.dissector(tvbuf, pktinfo, root)
+    -- set the protocol column to show our protocol name
+    pktinfo.cols.protocol:set("NEBULA")
+
+    local pktlen = tvbuf:reported_length_remaining()
+    local tree = root:add(nebula, tvbuf:range(0,pktlen))
+
+    if pktlen == 0 then
+        tree:add_proto_expert_info(ef_holepunch)
+        pktinfo.cols.info:append(" (holepunch)")
+        return
+    elseif pktlen == 1 then
+        tree:add_proto_expert_info(ef_punchy)
+        pktinfo.cols.info:append(" (punchy)")
+        return
+    end
+
+    tree:add(pf_version, tvbuf:range(0,1))
+    local type = tree:add(pf_type,    tvbuf:range(0,1))
+
+    local nebula_type = bit32.band(tvbuf:range(0,1):uint(), 0x0F)
+    if nebula_type == 0 then
+        local stage = tvbuf(8,8):uint64()
+        tree:add(pf_subtype_handshake, tvbuf:range(1,1))
+        type:append_text(" stage " .. stage)
+        pktinfo.cols.info:append(" (" .. type_field().display .. ", stage " .. stage .. ", " .. subtype_field().display .. ")")
+    elseif nebula_type == 4 then
+        tree:add(pf_subtype_test, tvbuf:range(1,1))
+        pktinfo.cols.info:append(" (" .. type_field().display .. ", " .. subtype_field().display .. ")")
+    else
+        tree:add(pf_subtype, tvbuf:range(1,1))
+        pktinfo.cols.info:append(" (" .. type_field().display .. ")")
+    end
+
+    tree:add(pf_reserved,        tvbuf:range(2,2))
+    tree:add(pf_remote_index,    tvbuf:range(4,4))
+    tree:add(pf_message_counter, tvbuf:range(8,8))
+    tree:add(pf_payload,         tvbuf:range(16,tvbuf:len() - 16))
+end
+
+function nebula.prefs_changed()
+    if default_settings.all_ports == nebula.prefs.all_ports and default_settings.port == nebula.prefs.port then
+        -- Nothing changed, bail
+        return
+    end
+
+    -- Remove our old dissector
+    DissectorTable.get("udp.port"):remove_all(nebula)
+
+    if nebula.prefs.all_ports and default_settings.all_ports ~= nebula.prefs.all_ports then
+        default_settings.all_port = nebula.prefs.all_ports
+
+        for i=0, 65535 do
+            DissectorTable.get("udp.port"):add(i, nebula)
+        end
+
+        -- no need to establish again on specific ports
+        return
+    end
+
+
+    if default_settings.all_ports ~= nebula.prefs.all_ports then
+        -- Add our new port dissector
+        default_settings.port = nebula.prefs.port
+        DissectorTable.get("udp.port"):add(default_settings.port, nebula)
+    end
+end
+
+DissectorTable.get("udp.port"):add(default_settings.port, nebula)

dns_server.go

@@ -7,6 +7,9 @@ import (
 	"sync"
 
 	"github.com/miekg/dns"
+	"github.com/sirupsen/logrus"
+	"github.com/slackhq/nebula/config"
+	"github.com/slackhq/nebula/iputil"
 )
 
 // This whole thing should be rewritten to use context
@@ -43,8 +46,8 @@ func (d *dnsRecords) QueryCert(data string) string {
 	if ip == nil {
 		return ""
 	}
-	iip := ip2int(ip)
+	iip := iputil.Ip2VpnIp(ip)
-	hostinfo, err := d.hostMap.QueryVpnIP(iip)
+	hostinfo, err := d.hostMap.QueryVpnIp(iip)
 	if err != nil {
 		return ""
 	}
@@ -63,7 +66,7 @@ func (d *dnsRecords) Add(host, data string) {
 	d.Unlock()
 }
 
-func parseQuery(m *dns.Msg, w dns.ResponseWriter) {
+func parseQuery(l *logrus.Logger, m *dns.Msg, w dns.ResponseWriter) {
 	for _, q := range m.Question {
 		switch q.Qtype {
 		case dns.TypeA:
@@ -95,37 +98,44 @@ func parseQuery(m *dns.Msg, w dns.ResponseWriter) {
 	}
 }
 
-func handleDnsRequest(w dns.ResponseWriter, r *dns.Msg) {
+func handleDnsRequest(l *logrus.Logger, w dns.ResponseWriter, r *dns.Msg) {
 	m := new(dns.Msg)
 	m.SetReply(r)
 	m.Compress = false
 
 	switch r.Opcode {
 	case dns.OpcodeQuery:
-		parseQuery(m, w)
+		parseQuery(l, m, w)
 	}
 
 	w.WriteMsg(m)
 }
 
-func dnsMain(hostMap *HostMap, c *Config) {
+func dnsMain(l *logrus.Logger, hostMap *HostMap, c *config.C) func() {
 	dnsR = newDnsRecords(hostMap)
 
 	// attach request handler func
-	dns.HandleFunc(".", handleDnsRequest)
+	dns.HandleFunc(".", func(w dns.ResponseWriter, r *dns.Msg) {
+		handleDnsRequest(l, w, r)
+	})
 
-	c.RegisterReloadCallback(reloadDns)
+	c.RegisterReloadCallback(func(c *config.C) {
-	startDns(c)
+		reloadDns(l, c)
+	})
+
+	return func() {
+		startDns(l, c)
+	}
 }
 
-func getDnsServerAddr(c *Config) string {
+func getDnsServerAddr(c *config.C) string {
 	return c.GetString("lighthouse.dns.host", "") + ":" + strconv.Itoa(c.GetInt("lighthouse.dns.port", 53))
 }
 
-func startDns(c *Config) {
+func startDns(l *logrus.Logger, c *config.C) {
 	dnsAddr = getDnsServerAddr(c)
 	dnsServer = &dns.Server{Addr: dnsAddr, Net: "udp"}
-	l.Debugf("Starting DNS responder at %s\n", dnsAddr)
+	l.WithField("dnsListener", dnsAddr).Info("Starting DNS responder")
 	err := dnsServer.ListenAndServe()
 	defer dnsServer.Shutdown()
 	if err != nil {
@@ -133,7 +143,7 @@ func startDns(c *Config) {
 	}
 }
 
-func reloadDns(c *Config) {
+func reloadDns(l *logrus.Logger, c *config.C) {
 	if dnsAddr == getDnsServerAddr(c) {
 		l.Debug("No DNS server config change detected")
 		return
@@ -141,5 +151,5 @@ func reloadDns(c *Config) {
 
 	l.Debug("Restarting DNS server")
 	dnsServer.Shutdown()
-	go startDns(c)
+	go startDns(l, c)
 }

e2e/doc.go

@@ -0,0 +1,3 @@
+package e2e
+
+// This file exists to allow `go fmt` to traverse here on its own. The build tags were keeping it out before

e2e/handshakes_test.go

@@ -0,0 +1,241 @@
+//go:build e2e_testing
+// +build e2e_testing
+
+package e2e
+
+import (
+	"net"
+	"testing"
+	"time"
+
+	"github.com/slackhq/nebula"
+	"github.com/slackhq/nebula/e2e/router"
+	"github.com/slackhq/nebula/header"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/udp"
+	"github.com/stretchr/testify/assert"
+)
+
+func BenchmarkHotPath(b *testing.B) {
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	myControl, _, _ := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 1}, nil)
+	theirControl, theirVpnIp, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
+
+	// Put their info in our lighthouse
+	myControl.InjectLightHouseAddr(theirVpnIp, theirUdpAddr)
+
+	// Start the servers
+	myControl.Start()
+	theirControl.Start()
+
+	r := router.NewR(b, myControl, theirControl)
+	r.CancelFlowLogs()
+
+	for n := 0; n < b.N; n++ {
+		myControl.InjectTunUDPPacket(theirVpnIp, 80, 80, []byte("Hi from me"))
+		_ = r.RouteForAllUntilTxTun(theirControl)
+	}
+
+	myControl.Stop()
+	theirControl.Stop()
+}
+
+func TestGoodHandshake(t *testing.T) {
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	myControl, myVpnIp, myUdpAddr := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 1}, nil)
+	theirControl, theirVpnIp, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
+
+	// Put their info in our lighthouse
+	myControl.InjectLightHouseAddr(theirVpnIp, theirUdpAddr)
+
+	// Start the servers
+	myControl.Start()
+	theirControl.Start()
+
+	t.Log("Send a udp packet through to begin standing up the tunnel, this should come out the other side")
+	myControl.InjectTunUDPPacket(theirVpnIp, 80, 80, []byte("Hi from me"))
+
+	t.Log("Have them consume my stage 0 packet. They have a tunnel now")
+	theirControl.InjectUDPPacket(myControl.GetFromUDP(true))
+
+	t.Log("Get their stage 1 packet so that we can play with it")
+	stage1Packet := theirControl.GetFromUDP(true)
+
+	t.Log("I consume a garbage packet with a proper nebula header for our tunnel")
+	// this should log a statement and get ignored, allowing the real handshake packet to complete the tunnel
+	badPacket := stage1Packet.Copy()
+	badPacket.Data = badPacket.Data[:len(badPacket.Data)-header.Len]
+	myControl.InjectUDPPacket(badPacket)
+
+	t.Log("Have me consume their real stage 1 packet. I have a tunnel now")
+	myControl.InjectUDPPacket(stage1Packet)
+
+	t.Log("Wait until we see my cached packet come through")
+	myControl.WaitForType(1, 0, theirControl)
+
+	t.Log("Make sure our host infos are correct")
+	assertHostInfoPair(t, myUdpAddr, theirUdpAddr, myVpnIp, theirVpnIp, myControl, theirControl)
+
+	t.Log("Get that cached packet and make sure it looks right")
+	myCachedPacket := theirControl.GetFromTun(true)
+	assertUdpPacket(t, []byte("Hi from me"), myCachedPacket, myVpnIp, theirVpnIp, 80, 80)
+
+	t.Log("Do a bidirectional tunnel test")
+	r := router.NewR(t, myControl, theirControl)
+	defer r.RenderFlow()
+	assertTunnel(t, myVpnIp, theirVpnIp, myControl, theirControl, r)
+
+	myControl.Stop()
+	theirControl.Stop()
+	//TODO: assert hostmaps
+}
+
+func TestWrongResponderHandshake(t *testing.T) {
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+
+	// The IPs here are chosen on purpose:
+	// The current remote handling will sort by preference, public, and then lexically.
+	// So we need them to have a higher address than evil (we could apply a preference though)
+	myControl, myVpnIp, myUdpAddr := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 100}, nil)
+	theirControl, theirVpnIp, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 99}, nil)
+	evilControl, evilVpnIp, evilUdpAddr := newSimpleServer(ca, caKey, "evil", net.IP{10, 0, 0, 2}, nil)
+
+	// Add their real udp addr, which should be tried after evil.
+	myControl.InjectLightHouseAddr(theirVpnIp, theirUdpAddr)
+
+	// Put the evil udp addr in for their vpn Ip, this is a case of being lied to by the lighthouse.
+	myControl.InjectLightHouseAddr(theirVpnIp, evilUdpAddr)
+
+	// Build a router so we don't have to reason who gets which packet
+	r := router.NewR(t, myControl, theirControl, evilControl)
+	defer r.RenderFlow()
+
+	// Start the servers
+	myControl.Start()
+	theirControl.Start()
+	evilControl.Start()
+
+	t.Log("Start the handshake process, we will route until we see our cached packet get sent to them")
+	myControl.InjectTunUDPPacket(theirVpnIp, 80, 80, []byte("Hi from me"))
+	r.RouteForAllExitFunc(func(p *udp.Packet, c *nebula.Control) router.ExitType {
+		h := &header.H{}
+		err := h.Parse(p.Data)
+		if err != nil {
+			panic(err)
+		}
+
+		if p.ToIp.Equal(theirUdpAddr.IP) && p.ToPort == uint16(theirUdpAddr.Port) && h.Type == 1 {
+			return router.RouteAndExit
+		}
+
+		return router.KeepRouting
+	})
+
+	//TODO: Assert pending hostmap - I should have a correct hostinfo for them now
+
+	t.Log("My cached packet should be received by them")
+	myCachedPacket := theirControl.GetFromTun(true)
+	assertUdpPacket(t, []byte("Hi from me"), myCachedPacket, myVpnIp, theirVpnIp, 80, 80)
+
+	t.Log("Test the tunnel with them")
+	assertHostInfoPair(t, myUdpAddr, theirUdpAddr, myVpnIp, theirVpnIp, myControl, theirControl)
+	assertTunnel(t, myVpnIp, theirVpnIp, myControl, theirControl, r)
+
+	t.Log("Flush all packets from all controllers")
+	r.FlushAll()
+
+	t.Log("Ensure ensure I don't have any hostinfo artifacts from evil")
+	assert.Nil(t, myControl.GetHostInfoByVpnIp(iputil.Ip2VpnIp(evilVpnIp), true), "My pending hostmap should not contain evil")
+	assert.Nil(t, myControl.GetHostInfoByVpnIp(iputil.Ip2VpnIp(evilVpnIp), false), "My main hostmap should not contain evil")
+	//NOTE: if evil lost the handshake race it may still have a tunnel since me would reject the handshake since the tunnel is complete
+
+	//TODO: assert hostmaps for everyone
+	t.Log("Success!")
+	myControl.Stop()
+	theirControl.Stop()
+}
+
+func Test_Case1_Stage1Race(t *testing.T) {
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	myControl, myVpnIp, myUdpAddr := newSimpleServer(ca, caKey, "me  ", net.IP{10, 0, 0, 1}, nil)
+	theirControl, theirVpnIp, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
+
+	// Put their info in our lighthouse and vice versa
+	myControl.InjectLightHouseAddr(theirVpnIp, theirUdpAddr)
+	theirControl.InjectLightHouseAddr(myVpnIp, myUdpAddr)
+
+	// Build a router so we don't have to reason who gets which packet
+	r := router.NewR(t, myControl, theirControl)
+	defer r.RenderFlow()
+
+	// Start the servers
+	myControl.Start()
+	theirControl.Start()
+
+	t.Log("Trigger a handshake to start on both me and them")
+	myControl.InjectTunUDPPacket(theirVpnIp, 80, 80, []byte("Hi from me"))
+	theirControl.InjectTunUDPPacket(myVpnIp, 80, 80, []byte("Hi from them"))
+
+	t.Log("Get both stage 1 handshake packets")
+	myHsForThem := myControl.GetFromUDP(true)
+	theirHsForMe := theirControl.GetFromUDP(true)
+
+	r.Log("Now inject both stage 1 handshake packets")
+	r.InjectUDPPacket(theirControl, myControl, theirHsForMe)
+	r.InjectUDPPacket(myControl, theirControl, myHsForThem)
+	//TODO: they should win, grab their index for me and make sure I use it in the end.
+
+	r.Log("They should not have a stage 2 (won the race) but I should send one")
+	r.InjectUDPPacket(myControl, theirControl, myControl.GetFromUDP(true))
+
+	r.Log("Route for me until I send a message packet to them")
+	r.RouteForAllUntilAfterMsgTypeTo(theirControl, header.Message, header.MessageNone)
+
+	t.Log("My cached packet should be received by them")
+	myCachedPacket := theirControl.GetFromTun(true)
+	assertUdpPacket(t, []byte("Hi from me"), myCachedPacket, myVpnIp, theirVpnIp, 80, 80)
+
+	t.Log("Route for them until I send a message packet to me")
+	theirControl.WaitForType(1, 0, myControl)
+
+	t.Log("Their cached packet should be received by me")
+	theirCachedPacket := myControl.GetFromTun(true)
+	assertUdpPacket(t, []byte("Hi from them"), theirCachedPacket, theirVpnIp, myVpnIp, 80, 80)
+
+	t.Log("Do a bidirectional tunnel test")
+	assertTunnel(t, myVpnIp, theirVpnIp, myControl, theirControl, r)
+
+	myControl.Stop()
+	theirControl.Stop()
+	//TODO: assert hostmaps
+}
+
+func TestRelays(t *testing.T) {
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	myControl, myVpnIp, _ := newSimpleServer(ca, caKey, "me     ", net.IP{10, 0, 0, 1}, m{"relay": m{"use_relays": true}})
+	relayControl, relayVpnIp, relayUdpAddr := newSimpleServer(ca, caKey, "relay  ", net.IP{10, 0, 0, 128}, m{"relay": m{"am_relay": true}})
+	theirControl, theirVpnIp, theirUdpAddr := newSimpleServer(ca, caKey, "them   ", net.IP{10, 0, 0, 2}, m{"relay": m{"use_relays": true}})
+
+	// Teach my how to get to the relay and that their can be reached via the relay
+	myControl.InjectLightHouseAddr(relayVpnIp, relayUdpAddr)
+	myControl.InjectRelays(theirVpnIp, []net.IP{relayVpnIp})
+	relayControl.InjectLightHouseAddr(theirVpnIp, theirUdpAddr)
+
+	// Build a router so we don't have to reason who gets which packet
+	r := router.NewR(t, myControl, relayControl, theirControl)
+	defer r.RenderFlow()
+
+	// Start the servers
+	myControl.Start()
+	relayControl.Start()
+	theirControl.Start()
+
+	t.Log("Trigger a handshake from me to them via the relay")
+	myControl.InjectTunUDPPacket(theirVpnIp, 80, 80, []byte("Hi from me"))
+
+	p := r.RouteForAllUntilTxTun(theirControl)
+	assertUdpPacket(t, []byte("Hi from me"), p, myVpnIp, theirVpnIp, 80, 80)
+	//TODO: assert we actually used the relay even though it should be impossible for a tunnel to have occurred without it
+}
+
+//TODO: add a test with many lies

e2e/helpers_test.go

@@ -0,0 +1,321 @@
+//go:build e2e_testing
+// +build e2e_testing
+
+package e2e
+
+import (
+	"crypto/rand"
+	"fmt"
+	"io"
+	"net"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+	"github.com/imdario/mergo"
+	"github.com/sirupsen/logrus"
+	"github.com/slackhq/nebula"
+	"github.com/slackhq/nebula/cert"
+	"github.com/slackhq/nebula/config"
+	"github.com/slackhq/nebula/e2e/router"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/stretchr/testify/assert"
+	"golang.org/x/crypto/curve25519"
+	"golang.org/x/crypto/ed25519"
+	"gopkg.in/yaml.v2"
+)
+
+type m map[string]interface{}
+
+// newSimpleServer creates a nebula instance with many assumptions
+func newSimpleServer(caCrt *cert.NebulaCertificate, caKey []byte, name string, udpIp net.IP, overrides m) (*nebula.Control, net.IP, *net.UDPAddr) {
+	l := NewTestLogger()
+
+	vpnIpNet := &net.IPNet{IP: make([]byte, len(udpIp)), Mask: net.IPMask{255, 255, 255, 0}}
+	copy(vpnIpNet.IP, udpIp)
+	vpnIpNet.IP[1] += 128
+	udpAddr := net.UDPAddr{
+		IP:   udpIp,
+		Port: 4242,
+	}
+	_, _, myPrivKey, myPEM := newTestCert(caCrt, caKey, name, time.Now(), time.Now().Add(5*time.Minute), vpnIpNet, nil, []string{})
+
+	caB, err := caCrt.MarshalToPEM()
+	if err != nil {
+		panic(err)
+	}
+
+	mc := m{
+		"pki": m{
+			"ca":   string(caB),
+			"cert": string(myPEM),
+			"key":  string(myPrivKey),
+		},
+		//"tun": m{"disabled": true},
+		"firewall": m{
+			"outbound": []m{{
+				"proto": "any",
+				"port":  "any",
+				"host":  "any",
+			}},
+			"inbound": []m{{
+				"proto": "any",
+				"port":  "any",
+				"host":  "any",
+			}},
+		},
+		//"handshakes": m{
+		//	"try_interval": "1s",
+		//},
+		"listen": m{
+			"host": udpAddr.IP.String(),
+			"port": udpAddr.Port,
+		},
+		"logging": m{
+			"timestamp_format": fmt.Sprintf("%v 15:04:05.000000", name),
+			"level":            l.Level.String(),
+		},
+	}
+
+	if overrides != nil {
+		err = mergo.Merge(&overrides, mc, mergo.WithAppendSlice)
+		if err != nil {
+			panic(err)
+		}
+		mc = overrides
+	}
+
+	cb, err := yaml.Marshal(mc)
+	if err != nil {
+		panic(err)
+	}
+
+	c := config.NewC(l)
+	c.LoadString(string(cb))
+
+	control, err := nebula.Main(c, false, "e2e-test", l, nil)
+
+	if err != nil {
+		panic(err)
+	}
+
+	return control, vpnIpNet.IP, &udpAddr
+}
+
+// newTestCaCert will generate a CA cert
+func newTestCaCert(before, after time.Time, ips, subnets []*net.IPNet, groups []string) (*cert.NebulaCertificate, []byte, []byte, []byte) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	if before.IsZero() {
+		before = time.Now().Add(time.Second * -60).Round(time.Second)
+	}
+	if after.IsZero() {
+		after = time.Now().Add(time.Second * 60).Round(time.Second)
+	}
+
+	nc := &cert.NebulaCertificate{
+		Details: cert.NebulaCertificateDetails{
+			Name:           "test ca",
+			NotBefore:      time.Unix(before.Unix(), 0),
+			NotAfter:       time.Unix(after.Unix(), 0),
+			PublicKey:      pub,
+			IsCA:           true,
+			InvertedGroups: make(map[string]struct{}),
+		},
+	}
+
+	if len(ips) > 0 {
+		nc.Details.Ips = ips
+	}
+
+	if len(subnets) > 0 {
+		nc.Details.Subnets = subnets
+	}
+
+	if len(groups) > 0 {
+		nc.Details.Groups = groups
+	}
+
+	err = nc.Sign(priv)
+	if err != nil {
+		panic(err)
+	}
+
+	pem, err := nc.MarshalToPEM()
+	if err != nil {
+		panic(err)
+	}
+
+	return nc, pub, priv, pem
+}
+
+// newTestCert will generate a signed certificate with the provided details.
+// Expiry times are defaulted if you do not pass them in
+func newTestCert(ca *cert.NebulaCertificate, key []byte, name string, before, after time.Time, ip *net.IPNet, subnets []*net.IPNet, groups []string) (*cert.NebulaCertificate, []byte, []byte, []byte) {
+	issuer, err := ca.Sha256Sum()
+	if err != nil {
+		panic(err)
+	}
+
+	if before.IsZero() {
+		before = time.Now().Add(time.Second * -60).Round(time.Second)
+	}
+
+	if after.IsZero() {
+		after = time.Now().Add(time.Second * 60).Round(time.Second)
+	}
+
+	pub, rawPriv := x25519Keypair()
+
+	nc := &cert.NebulaCertificate{
+		Details: cert.NebulaCertificateDetails{
+			Name:           name,
+			Ips:            []*net.IPNet{ip},
+			Subnets:        subnets,
+			Groups:         groups,
+			NotBefore:      time.Unix(before.Unix(), 0),
+			NotAfter:       time.Unix(after.Unix(), 0),
+			PublicKey:      pub,
+			IsCA:           false,
+			Issuer:         issuer,
+			InvertedGroups: make(map[string]struct{}),
+		},
+	}
+
+	err = nc.Sign(key)
+	if err != nil {
+		panic(err)
+	}
+
+	pem, err := nc.MarshalToPEM()
+	if err != nil {
+		panic(err)
+	}
+
+	return nc, pub, cert.MarshalX25519PrivateKey(rawPriv), pem
+}
+
+func x25519Keypair() ([]byte, []byte) {
+	privkey := make([]byte, 32)
+	if _, err := io.ReadFull(rand.Reader, privkey); err != nil {
+		panic(err)
+	}
+
+	pubkey, err := curve25519.X25519(privkey, curve25519.Basepoint)
+	if err != nil {
+		panic(err)
+	}
+
+	return pubkey, privkey
+}
+
+type doneCb func()
+
+func deadline(t *testing.T, seconds time.Duration) doneCb {
+	timeout := time.After(seconds * time.Second)
+	done := make(chan bool)
+	go func() {
+		select {
+		case <-timeout:
+			t.Fatal("Test did not finish in time")
+		case <-done:
+		}
+	}()
+
+	return func() {
+		done <- true
+	}
+}
+
+func assertTunnel(t *testing.T, vpnIpA, vpnIpB net.IP, controlA, controlB *nebula.Control, r *router.R) {
+	// Send a packet from them to me
+	controlB.InjectTunUDPPacket(vpnIpA, 80, 90, []byte("Hi from B"))
+	bPacket := r.RouteUntilTxTun(controlB, controlA)
+	assertUdpPacket(t, []byte("Hi from B"), bPacket, vpnIpB, vpnIpA, 90, 80)
+
+	// And once more from me to them
+	controlA.InjectTunUDPPacket(vpnIpB, 80, 90, []byte("Hello from A"))
+	aPacket := r.RouteUntilTxTun(controlA, controlB)
+	assertUdpPacket(t, []byte("Hello from A"), aPacket, vpnIpA, vpnIpB, 90, 80)
+}
+
+func assertHostInfoPair(t *testing.T, addrA, addrB *net.UDPAddr, vpnIpA, vpnIpB net.IP, controlA, controlB *nebula.Control) {
+	// Get both host infos
+	hBinA := controlA.GetHostInfoByVpnIp(iputil.Ip2VpnIp(vpnIpB), false)
+	assert.NotNil(t, hBinA, "Host B was not found by vpnIp in controlA")
+
+	hAinB := controlB.GetHostInfoByVpnIp(iputil.Ip2VpnIp(vpnIpA), false)
+	assert.NotNil(t, hAinB, "Host A was not found by vpnIp in controlB")
+
+	// Check that both vpn and real addr are correct
+	assert.Equal(t, vpnIpB, hBinA.VpnIp, "Host B VpnIp is wrong in control A")
+	assert.Equal(t, vpnIpA, hAinB.VpnIp, "Host A VpnIp is wrong in control B")
+
+	assert.Equal(t, addrB.IP.To16(), hBinA.CurrentRemote.IP.To16(), "Host B remote ip is wrong in control A")
+	assert.Equal(t, addrA.IP.To16(), hAinB.CurrentRemote.IP.To16(), "Host A remote ip is wrong in control B")
+
+	assert.Equal(t, addrB.Port, int(hBinA.CurrentRemote.Port), "Host B remote port is wrong in control A")
+	assert.Equal(t, addrA.Port, int(hAinB.CurrentRemote.Port), "Host A remote port is wrong in control B")
+
+	// Check that our indexes match
+	assert.Equal(t, hBinA.LocalIndex, hAinB.RemoteIndex, "Host B local index does not match host A remote index")
+	assert.Equal(t, hBinA.RemoteIndex, hAinB.LocalIndex, "Host B remote index does not match host A local index")
+
+	//TODO: Would be nice to assert this memory
+	//checkIndexes := func(name string, hm *HostMap, hi *HostInfo) {
+	//	hBbyIndex := hmA.Indexes[hBinA.localIndexId]
+	//	assert.NotNil(t, hBbyIndex, "Could not host info by local index in %s", name)
+	//	assert.Equal(t, &hBbyIndex, &hBinA, "%s Indexes map did not point to the right host info", name)
+	//
+	//	//TODO: remote indexes are susceptible to collision
+	//	hBbyRemoteIndex := hmA.RemoteIndexes[hBinA.remoteIndexId]
+	//	assert.NotNil(t, hBbyIndex, "Could not host info by remote index in %s", name)
+	//	assert.Equal(t, &hBbyRemoteIndex, &hBinA, "%s RemoteIndexes did not point to the right host info", name)
+	//}
+	//
+	//// Check hostmap indexes too
+	//checkIndexes("hmA", hmA, hBinA)
+	//checkIndexes("hmB", hmB, hAinB)
+}
+
+func assertUdpPacket(t *testing.T, expected, b []byte, fromIp, toIp net.IP, fromPort, toPort uint16) {
+	packet := gopacket.NewPacket(b, layers.LayerTypeIPv4, gopacket.Lazy)
+	v4 := packet.Layer(layers.LayerTypeIPv4).(*layers.IPv4)
+	assert.NotNil(t, v4, "No ipv4 data found")
+
+	assert.Equal(t, fromIp, v4.SrcIP, "Source ip was incorrect")
+	assert.Equal(t, toIp, v4.DstIP, "Dest ip was incorrect")
+
+	udp := packet.Layer(layers.LayerTypeUDP).(*layers.UDP)
+	assert.NotNil(t, udp, "No udp data found")
+
+	assert.Equal(t, fromPort, uint16(udp.SrcPort), "Source port was incorrect")
+	assert.Equal(t, toPort, uint16(udp.DstPort), "Dest port was incorrect")
+
+	data := packet.ApplicationLayer()
+	assert.NotNil(t, data)
+	assert.Equal(t, expected, data.Payload(), "Data was incorrect")
+}
+
+func NewTestLogger() *logrus.Logger {
+	l := logrus.New()
+
+	v := os.Getenv("TEST_LOGS")
+	if v == "" {
+		l.SetOutput(io.Discard)
+		l.SetLevel(logrus.PanicLevel)
+		return l
+	}
+
+	switch v {
+	case "2":
+		l.SetLevel(logrus.DebugLevel)
+	case "3":
+		l.SetLevel(logrus.TraceLevel)
+	default:
+		l.SetLevel(logrus.InfoLevel)
+	}
+
+	return l
+}

e2e/router/doc.go

@@ -0,0 +1,3 @@
+package router
+
+// This file exists to allow `go fmt` to traverse here on its own. The build tags were keeping it out before

e2e/router/router.go

@@ -0,0 +1,653 @@
+//go:build e2e_testing
+// +build e2e_testing
+
+package router
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"os"
+	"path/filepath"
+	"reflect"
+	"strconv"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+	"github.com/slackhq/nebula"
+	"github.com/slackhq/nebula/header"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/udp"
+)
+
+type R struct {
+	// Simple map of the ip:port registered on a control to the control
+	// Basically a router, right?
+	controls map[string]*nebula.Control
+
+	// A map for inbound packets for a control that doesn't know about this address
+	inNat map[string]*nebula.Control
+
+	// A last used map, if an inbound packet hit the inNat map then
+	// all return packets should use the same last used inbound address for the outbound sender
+	// map[from address + ":" + to address] => ip:port to rewrite in the udp packet to receiver
+	outNat map[string]net.UDPAddr
+
+	// A map of vpn ip to the nebula control it belongs to
+	vpnControls map[iputil.VpnIp]*nebula.Control
+
+	flow []flowEntry
+
+	// All interactions are locked to help serialize behavior
+	sync.Mutex
+
+	fn           string
+	cancelRender context.CancelFunc
+	t            testing.TB
+}
+
+type flowEntry struct {
+	note   string
+	packet *packet
+}
+
+type packet struct {
+	from   *nebula.Control
+	to     *nebula.Control
+	packet *udp.Packet
+	tun    bool // a packet pulled off a tun device
+	rx     bool // the packet was received by a udp device
+}
+
+func (p *packet) WasReceived() {
+	if p != nil {
+		p.rx = true
+	}
+}
+
+type ExitType int
+
+const (
+	// KeepRouting the function will get called again on the next packet
+	KeepRouting ExitType = 0
+	// ExitNow does not route this packet and exits immediately
+	ExitNow ExitType = 1
+	// RouteAndExit routes this packet and exits immediately afterwards
+	RouteAndExit ExitType = 2
+)
+
+type ExitFunc func(packet *udp.Packet, receiver *nebula.Control) ExitType
+
+// NewR creates a new router to pass packets in a controlled fashion between the provided controllers.
+// The packet flow will be recorded in a file within the mermaid directory under the same name as the test.
+// Renders will occur automatically, roughly every 100ms, until a call to RenderFlow() is made
+func NewR(t testing.TB, controls ...*nebula.Control) *R {
+	ctx, cancel := context.WithCancel(context.Background())
+
+	if err := os.MkdirAll("mermaid", 0755); err != nil {
+		panic(err)
+	}
+
+	r := &R{
+		controls:     make(map[string]*nebula.Control),
+		vpnControls:  make(map[iputil.VpnIp]*nebula.Control),
+		inNat:        make(map[string]*nebula.Control),
+		outNat:       make(map[string]net.UDPAddr),
+		flow:         []flowEntry{},
+		fn:           filepath.Join("mermaid", fmt.Sprintf("%s.md", t.Name())),
+		t:            t,
+		cancelRender: cancel,
+	}
+
+	// Try to remove our render file
+	os.Remove(r.fn)
+
+	for _, c := range controls {
+		addr := c.GetUDPAddr()
+		if _, ok := r.controls[addr]; ok {
+			panic("Duplicate listen address: " + addr)
+		}
+
+		r.vpnControls[c.GetVpnIp()] = c
+		r.controls[addr] = c
+	}
+
+	// Spin the renderer in case we go nuts and the test never completes
+	go func() {
+		clockSource := time.NewTicker(time.Millisecond * 100)
+		defer clockSource.Stop()
+
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-clockSource.C:
+				r.renderFlow()
+			}
+		}
+	}()
+
+	return r
+}
+
+// AddRoute will place the nebula controller at the ip and port specified.
+// It does not look at the addr attached to the instance.
+// If a route is used, this will behave like a NAT for the return path.
+// Rewriting the source ip:port to what was last sent to from the origin
+func (r *R) AddRoute(ip net.IP, port uint16, c *nebula.Control) {
+	r.Lock()
+	defer r.Unlock()
+
+	inAddr := net.JoinHostPort(ip.String(), fmt.Sprintf("%v", port))
+	if _, ok := r.inNat[inAddr]; ok {
+		panic("Duplicate listen address inNat: " + inAddr)
+	}
+	r.inNat[inAddr] = c
+}
+
+// RenderFlow renders the packet flow seen up until now and stops further automatic renders from happening.
+func (r *R) RenderFlow() {
+	r.cancelRender()
+	r.renderFlow()
+}
+
+// CancelFlowLogs stops flow logs from being tracked and destroys any logs already collected
+func (r *R) CancelFlowLogs() {
+	r.cancelRender()
+	r.flow = nil
+}
+
+func (r *R) renderFlow() {
+	if r.flow == nil {
+		return
+	}
+
+	f, err := os.OpenFile(r.fn, os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0644)
+	if err != nil {
+		panic(err)
+	}
+
+	var participants = map[string]struct{}{}
+	var participantsVals []string
+
+	fmt.Fprintln(f, "```mermaid")
+	fmt.Fprintln(f, "sequenceDiagram")
+
+	// Assemble participants
+	for _, e := range r.flow {
+		if e.packet == nil {
+			continue
+		}
+
+		addr := e.packet.from.GetUDPAddr()
+		if _, ok := participants[addr]; ok {
+			continue
+		}
+		participants[addr] = struct{}{}
+		sanAddr := strings.Replace(addr, ":", "#58;", 1)
+		participantsVals = append(participantsVals, sanAddr)
+		fmt.Fprintf(
+			f, "    participant %s as Nebula: %s<br/>UDP: %s\n",
+			sanAddr, e.packet.from.GetVpnIp(), sanAddr,
+		)
+	}
+
+	// Print packets
+	h := &header.H{}
+	for _, e := range r.flow {
+		if e.packet == nil {
+			fmt.Fprintf(f, "    note over %s: %s\n", strings.Join(participantsVals, ", "), e.note)
+			continue
+		}
+
+		p := e.packet
+		if p.tun {
+			fmt.Fprintln(f, r.formatUdpPacket(p))
+
+		} else {
+			if err := h.Parse(p.packet.Data); err != nil {
+				panic(err)
+			}
+
+			line := "--x"
+			if p.rx {
+				line = "->>"
+			}
+
+			fmt.Fprintf(f,
+				"    %s%s%s: %s(%s), counter: %v\n",
+				strings.Replace(p.from.GetUDPAddr(), ":", "#58;", 1),
+				line,
+				strings.Replace(p.to.GetUDPAddr(), ":", "#58;", 1),
+				h.TypeName(), h.SubTypeName(), h.MessageCounter,
+			)
+		}
+	}
+	fmt.Fprintln(f, "```")
+}
+
+// InjectFlow can be used to record packet flow if the test is handling the routing on its own.
+// The packet is assumed to have been received
+func (r *R) InjectFlow(from, to *nebula.Control, p *udp.Packet) {
+	r.Lock()
+	defer r.Unlock()
+	r.unlockedInjectFlow(from, to, p, false)
+}
+
+func (r *R) Log(arg ...any) {
+	if r.flow == nil {
+		return
+	}
+
+	r.Lock()
+	r.flow = append(r.flow, flowEntry{note: fmt.Sprint(arg...)})
+	r.t.Log(arg...)
+	r.Unlock()
+}
+
+func (r *R) Logf(format string, arg ...any) {
+	if r.flow == nil {
+		return
+	}
+
+	r.Lock()
+	r.flow = append(r.flow, flowEntry{note: fmt.Sprintf(format, arg...)})
+	r.t.Logf(format, arg...)
+	r.Unlock()
+}
+
+// unlockedInjectFlow is used by the router to record a packet has been transmitted, the packet is returned and
+// should be marked as received AFTER it has been placed on the receivers channel.
+// If flow logs have been disabled this function will return nil
+func (r *R) unlockedInjectFlow(from, to *nebula.Control, p *udp.Packet, tun bool) *packet {
+	if r.flow == nil {
+		return nil
+	}
+
+	fp := &packet{
+		from:   from,
+		to:     to,
+		packet: p.Copy(),
+		tun:    tun,
+	}
+
+	r.flow = append(r.flow, flowEntry{packet: fp})
+	return fp
+}
+
+// OnceFrom will route a single packet from sender then return
+// If the router doesn't have the nebula controller for that address, we panic
+func (r *R) OnceFrom(sender *nebula.Control) {
+	r.RouteExitFunc(sender, func(*udp.Packet, *nebula.Control) ExitType {
+		return RouteAndExit
+	})
+}
+
+// RouteUntilTxTun will route for sender and return when a packet is seen on receivers tun
+// If the router doesn't have the nebula controller for that address, we panic
+func (r *R) RouteUntilTxTun(sender *nebula.Control, receiver *nebula.Control) []byte {
+	tunTx := receiver.GetTunTxChan()
+	udpTx := sender.GetUDPTxChan()
+
+	for {
+		select {
+		// Maybe we already have something on the tun for us
+		case b := <-tunTx:
+			r.Lock()
+			np := udp.Packet{Data: make([]byte, len(b))}
+			copy(np.Data, b)
+			r.unlockedInjectFlow(receiver, receiver, &np, true)
+			r.Unlock()
+			return b
+
+		// Nope, lets push the sender along
+		case p := <-udpTx:
+			outAddr := sender.GetUDPAddr()
+			r.Lock()
+			inAddr := net.JoinHostPort(p.ToIp.String(), fmt.Sprintf("%v", p.ToPort))
+			c := r.getControl(outAddr, inAddr, p)
+			if c == nil {
+				r.Unlock()
+				panic("No control for udp tx")
+			}
+			fp := r.unlockedInjectFlow(sender, c, p, false)
+			c.InjectUDPPacket(p)
+			fp.WasReceived()
+			r.Unlock()
+		}
+	}
+}
+
+// RouteForAllUntilTxTun will route for everyone and return when a packet is seen on receivers tun
+// If the router doesn't have the nebula controller for that address, we panic
+func (r *R) RouteForAllUntilTxTun(receiver *nebula.Control) []byte {
+	sc := make([]reflect.SelectCase, len(r.controls)+1)
+	cm := make([]*nebula.Control, len(r.controls)+1)
+
+	i := 0
+	sc[i] = reflect.SelectCase{
+		Dir:  reflect.SelectRecv,
+		Chan: reflect.ValueOf(receiver.GetTunTxChan()),
+		Send: reflect.Value{},
+	}
+	cm[i] = receiver
+
+	i++
+	for _, c := range r.controls {
+		sc[i] = reflect.SelectCase{
+			Dir:  reflect.SelectRecv,
+			Chan: reflect.ValueOf(c.GetUDPTxChan()),
+			Send: reflect.Value{},
+		}
+
+		cm[i] = c
+		i++
+	}
+
+	for {
+		x, rx, _ := reflect.Select(sc)
+		r.Lock()
+
+		if x == 0 {
+			// we are the tun tx, we can exit
+			p := rx.Interface().([]byte)
+			np := udp.Packet{Data: make([]byte, len(p))}
+			copy(np.Data, p)
+
+			r.unlockedInjectFlow(cm[x], cm[x], &np, true)
+			r.Unlock()
+			return p
+
+		} else {
+			// we are a udp tx, route and continue
+			p := rx.Interface().(*udp.Packet)
+			outAddr := cm[x].GetUDPAddr()
+
+			inAddr := net.JoinHostPort(p.ToIp.String(), fmt.Sprintf("%v", p.ToPort))
+			c := r.getControl(outAddr, inAddr, p)
+			if c == nil {
+				r.Unlock()
+				panic("No control for udp tx")
+			}
+			fp := r.unlockedInjectFlow(cm[x], c, p, false)
+			c.InjectUDPPacket(p)
+			fp.WasReceived()
+		}
+		r.Unlock()
+	}
+}
+
+// RouteExitFunc will call the whatDo func with each udp packet from sender.
+// whatDo can return:
+//   - exitNow: the packet will not be routed and this call will return immediately
+//   - routeAndExit: this call will return immediately after routing the last packet from sender
+//   - keepRouting: the packet will be routed and whatDo will be called again on the next packet from sender
+func (r *R) RouteExitFunc(sender *nebula.Control, whatDo ExitFunc) {
+	h := &header.H{}
+	for {
+		p := sender.GetFromUDP(true)
+		r.Lock()
+		if err := h.Parse(p.Data); err != nil {
+			panic(err)
+		}
+
+		outAddr := sender.GetUDPAddr()
+		inAddr := net.JoinHostPort(p.ToIp.String(), fmt.Sprintf("%v", p.ToPort))
+		receiver := r.getControl(outAddr, inAddr, p)
+		if receiver == nil {
+			r.Unlock()
+			panic("Can't route for host: " + inAddr)
+		}
+
+		e := whatDo(p, receiver)
+		switch e {
+		case ExitNow:
+			r.Unlock()
+			return
+
+		case RouteAndExit:
+			fp := r.unlockedInjectFlow(sender, receiver, p, false)
+			receiver.InjectUDPPacket(p)
+			fp.WasReceived()
+			r.Unlock()
+			return
+
+		case KeepRouting:
+			fp := r.unlockedInjectFlow(sender, receiver, p, false)
+			receiver.InjectUDPPacket(p)
+			fp.WasReceived()
+
+		default:
+			panic(fmt.Sprintf("Unknown exitFunc return: %v", e))
+		}
+
+		r.Unlock()
+	}
+}
+
+// RouteUntilAfterMsgType will route for sender until a message type is seen and sent from sender
+// If the router doesn't have the nebula controller for that address, we panic
+func (r *R) RouteUntilAfterMsgType(sender *nebula.Control, msgType header.MessageType, subType header.MessageSubType) {
+	h := &header.H{}
+	r.RouteExitFunc(sender, func(p *udp.Packet, r *nebula.Control) ExitType {
+		if err := h.Parse(p.Data); err != nil {
+			panic(err)
+		}
+		if h.Type == msgType && h.Subtype == subType {
+			return RouteAndExit
+		}
+
+		return KeepRouting
+	})
+}
+
+func (r *R) RouteForAllUntilAfterMsgTypeTo(receiver *nebula.Control, msgType header.MessageType, subType header.MessageSubType) {
+	h := &header.H{}
+	r.RouteForAllExitFunc(func(p *udp.Packet, r *nebula.Control) ExitType {
+		if r != receiver {
+			return KeepRouting
+		}
+
+		if err := h.Parse(p.Data); err != nil {
+			panic(err)
+		}
+
+		if h.Type == msgType && h.Subtype == subType {
+			return RouteAndExit
+		}
+
+		return KeepRouting
+	})
+}
+
+func (r *R) InjectUDPPacket(sender, receiver *nebula.Control, packet *udp.Packet) {
+	r.Lock()
+	defer r.Unlock()
+
+	fp := r.unlockedInjectFlow(sender, receiver, packet, false)
+	receiver.InjectUDPPacket(packet)
+	fp.WasReceived()
+}
+
+// RouteForUntilAfterToAddr will route for sender and return only after it sees and sends a packet destined for toAddr
+// finish can be any of the exitType values except `keepRouting`, the default value is `routeAndExit`
+// If the router doesn't have the nebula controller for that address, we panic
+func (r *R) RouteForUntilAfterToAddr(sender *nebula.Control, toAddr *net.UDPAddr, finish ExitType) {
+	if finish == KeepRouting {
+		finish = RouteAndExit
+	}
+
+	r.RouteExitFunc(sender, func(p *udp.Packet, r *nebula.Control) ExitType {
+		if p.ToIp.Equal(toAddr.IP) && p.ToPort == uint16(toAddr.Port) {
+			return finish
+		}
+
+		return KeepRouting
+	})
+}
+
+// RouteForAllExitFunc will route for every registered controller and calls the whatDo func with each udp packet from
+// whatDo can return:
+//   - exitNow: the packet will not be routed and this call will return immediately
+//   - routeAndExit: this call will return immediately after routing the last packet from sender
+//   - keepRouting: the packet will be routed and whatDo will be called again on the next packet from sender
+func (r *R) RouteForAllExitFunc(whatDo ExitFunc) {
+	sc := make([]reflect.SelectCase, len(r.controls))
+	cm := make([]*nebula.Control, len(r.controls))
+
+	i := 0
+	for _, c := range r.controls {
+		sc[i] = reflect.SelectCase{
+			Dir:  reflect.SelectRecv,
+			Chan: reflect.ValueOf(c.GetUDPTxChan()),
+			Send: reflect.Value{},
+		}
+
+		cm[i] = c
+		i++
+	}
+
+	for {
+		x, rx, _ := reflect.Select(sc)
+		r.Lock()
+
+		p := rx.Interface().(*udp.Packet)
+
+		outAddr := cm[x].GetUDPAddr()
+		inAddr := net.JoinHostPort(p.ToIp.String(), fmt.Sprintf("%v", p.ToPort))
+		receiver := r.getControl(outAddr, inAddr, p)
+		if receiver == nil {
+			r.Unlock()
+			panic("Can't route for host: " + inAddr)
+		}
+
+		e := whatDo(p, receiver)
+		switch e {
+		case ExitNow:
+			r.Unlock()
+			return
+
+		case RouteAndExit:
+			fp := r.unlockedInjectFlow(cm[x], receiver, p, false)
+			receiver.InjectUDPPacket(p)
+			fp.WasReceived()
+			r.Unlock()
+			return
+
+		case KeepRouting:
+			fp := r.unlockedInjectFlow(cm[x], receiver, p, false)
+			receiver.InjectUDPPacket(p)
+			fp.WasReceived()
+
+		default:
+			panic(fmt.Sprintf("Unknown exitFunc return: %v", e))
+		}
+		r.Unlock()
+	}
+}
+
+// FlushAll will route for every registered controller, exiting once there are no packets left to route
+func (r *R) FlushAll() {
+	sc := make([]reflect.SelectCase, len(r.controls))
+	cm := make([]*nebula.Control, len(r.controls))
+
+	i := 0
+	for _, c := range r.controls {
+		sc[i] = reflect.SelectCase{
+			Dir:  reflect.SelectRecv,
+			Chan: reflect.ValueOf(c.GetUDPTxChan()),
+			Send: reflect.Value{},
+		}
+
+		cm[i] = c
+		i++
+	}
+
+	// Add a default case to exit when nothing is left to send
+	sc = append(sc, reflect.SelectCase{
+		Dir:  reflect.SelectDefault,
+		Chan: reflect.Value{},
+		Send: reflect.Value{},
+	})
+
+	for {
+		x, rx, ok := reflect.Select(sc)
+		if !ok {
+			return
+		}
+		r.Lock()
+
+		p := rx.Interface().(*udp.Packet)
+
+		outAddr := cm[x].GetUDPAddr()
+		inAddr := net.JoinHostPort(p.ToIp.String(), fmt.Sprintf("%v", p.ToPort))
+		receiver := r.getControl(outAddr, inAddr, p)
+		if receiver == nil {
+			r.Unlock()
+			panic("Can't route for host: " + inAddr)
+		}
+		r.Unlock()
+	}
+}
+
+// getControl performs or seeds NAT translation and returns the control for toAddr, p from fields may change
+// This is an internal router function, the caller must hold the lock
+func (r *R) getControl(fromAddr, toAddr string, p *udp.Packet) *nebula.Control {
+	if newAddr, ok := r.outNat[fromAddr+":"+toAddr]; ok {
+		p.FromIp = newAddr.IP
+		p.FromPort = uint16(newAddr.Port)
+	}
+
+	c, ok := r.inNat[toAddr]
+	if ok {
+		sHost, sPort, err := net.SplitHostPort(toAddr)
+		if err != nil {
+			panic(err)
+		}
+
+		port, err := strconv.Atoi(sPort)
+		if err != nil {
+			panic(err)
+		}
+
+		r.outNat[c.GetUDPAddr()+":"+fromAddr] = net.UDPAddr{
+			IP:   net.ParseIP(sHost),
+			Port: port,
+		}
+		return c
+	}
+
+	return r.controls[toAddr]
+}
+
+func (r *R) formatUdpPacket(p *packet) string {
+	packet := gopacket.NewPacket(p.packet.Data, layers.LayerTypeIPv4, gopacket.Lazy)
+	v4 := packet.Layer(layers.LayerTypeIPv4).(*layers.IPv4)
+	if v4 == nil {
+		panic("not an ipv4 packet")
+	}
+
+	from := "unknown"
+	if c, ok := r.vpnControls[iputil.Ip2VpnIp(v4.SrcIP)]; ok {
+		from = c.GetUDPAddr()
+	}
+
+	udp := packet.Layer(layers.LayerTypeUDP).(*layers.UDP)
+	if udp == nil {
+		panic("not a udp packet")
+	}
+
+	data := packet.ApplicationLayer()
+	return fmt.Sprintf(
+		"    %s-->>%s: src port: %v<br/>dest port: %v<br/>data: \"%v\"\n",
+		strings.Replace(from, ":", "#58;", 1),
+		strings.Replace(p.to.GetUDPAddr(), ":", "#58;", 1),
+		udp.SrcPort,
+		udp.DstPort,
+		string(data.Payload()),
+	)
+}

examples/config.yml

@@ -7,9 +7,11 @@ pki:
   ca: /etc/nebula/ca.crt
   cert: /etc/nebula/host.crt
   key: /etc/nebula/host.key
-  #blacklist is a list of certificate fingerprints that we will refuse to talk to
+  # blocklist is a list of certificate fingerprints that we will refuse to talk to
-  #blacklist:
+  #blocklist:
   #  - c99d4e650533b92061b09918e838a5a0a6aaee21eed1d12fd937682865936c72
+  # disconnect_invalid is a toggle to force a client to be disconnected if the certificate is expired or invalid.
+  #disconnect_invalid: false
 
 # The static host map defines a set of hosts with fixed IP addresses on the internet (or any network).
 # A host can have multiple fixed IP addresses defined here, and nebula will try each when establishing a tunnel.
@@ -36,12 +38,62 @@ lighthouse:
   interval: 60
   # hosts is a list of lighthouse hosts this node should report to and query from
   # IMPORTANT: THIS SHOULD BE EMPTY ON LIGHTHOUSE NODES
+  # IMPORTANT2: THIS SHOULD BE LIGHTHOUSES' NEBULA IPs, NOT LIGHTHOUSES' REAL ROUTABLE IPs
   hosts:
     - "192.168.100.1"
 
+  # remote_allow_list allows you to control ip ranges that this node will
+  # consider when handshaking to another node. By default, any remote IPs are
+  # allowed. You can provide CIDRs here with `true` to allow and `false` to
+  # deny. The most specific CIDR rule applies to each remote. If all rules are
+  # "allow", the default will be "deny", and vice-versa. If both "allow" and
+  # "deny" rules are present, then you MUST set a rule for "0.0.0.0/0" as the
+  # default.
+  #remote_allow_list:
+    # Example to block IPs from this subnet from being used for remote IPs.
+    #"172.16.0.0/12": false
+
+    # A more complicated example, allow public IPs but only private IPs from a specific subnet
+    #"0.0.0.0/0": true
+    #"10.0.0.0/8": false
+    #"10.42.42.0/24": true
+
+  # EXPERIMENTAL: This option my change or disappear in the future.
+  # Optionally allows the definition of remote_allow_list blocks
+  # specific to an inside VPN IP CIDR.
+  #remote_allow_ranges:
+    # This rule would only allow only private IPs for this VPN range
+    #"10.42.42.0/24":
+      #"192.168.0.0/16": true
+
+  # local_allow_list allows you to filter which local IP addresses we advertise
+  # to the lighthouses. This uses the same logic as `remote_allow_list`, but
+  # additionally, you can specify an `interfaces` map of regular expressions
+  # to match against interface names. The regexp must match the entire name.
+  # All interface rules must be either true or false (and the default will be
+  # the inverse). CIDR rules are matched after interface name rules.
+  # Default is all local IP addresses.
+  #local_allow_list:
+    # Example to block tun0 and all docker interfaces.
+    #interfaces:
+      #tun0: false
+      #'docker.*': false
+    # Example to only advertise this subnet to the lighthouse.
+    #"10.0.0.0/8": true
+
+  # advertise_addrs are routable addresses that will be included along with discovered addresses to report to the
+  # lighthouse, the format is "ip:port". `port` can be `0`, in which case the actual listening port will be used in its
+  # place, useful if `listen.port` is set to 0.
+  # This option is mainly useful when there are static ip addresses the host can be reached at that nebula can not
+  # typically discover on its own. Examples being port forwarding or multiple paths to the internet.
+  #advertise_addrs:
+    #- "1.1.1.1:4242"
+    #- "1.2.3.4:0" # port will be replaced with the real listening port
+
 # Port Nebula will be listening on. The default here is 4242. For a lighthouse node, the port should be defined,
 # however using port 0 will dynamically assign a port and is recommended for roaming nodes.
 listen:
+  # To listen on both any ipv4 and ipv6 use "[::]"
   host: 0.0.0.0
   port: 4242
   # Sets the max number of packets to pull from the kernel for each syscall (under systems that support recvmmsg)
@@ -53,20 +105,41 @@ listen:
   # max, net.core.rmem_max and net.core.wmem_max
   #read_buffer: 10485760
   #write_buffer: 10485760
+  # By default, Nebula replies to packets it has no tunnel for with a "recv_error" packet. This packet helps speed up reconnection
+  # in the case that Nebula on either side did not shut down cleanly. This response can be abused as a way to discover if Nebula is running
+  # on a host though. This option lets you configure if you want to send "recv_error" packets always, never, or only to private network remotes.
+  # valid values: always, never, private
+  # This setting is reloadable.
+  #send_recv_error: always
 
-# Punchy continues to punch inbound/outbound at a regular interval to avoid expiration of firewall nat mappings
+# Routines is the number of thread pairs to run that consume from the tun and UDP queues.
-punchy: true
+# Currently, this defaults to 1 which means we have 1 tun queue reader and 1
-# punch_back means that a node you are trying to reach will connect back out to you if your hole punching fails
+# UDP queue reader. Setting this above one will set IFF_MULTI_QUEUE on the tun
-# this is extremely useful if one node is behind a difficult nat, such as symmetric
+# device and SO_REUSEPORT on the UDP socket to allow multiple queues.
-#punch_back: true
+# This option is only supported on Linux.
+#routines: 1
 
-# Cipher allows you to choose between the available ciphers for your network.
+punchy:
+  # Continues to punch inbound/outbound at a regular interval to avoid expiration of firewall nat mappings
+  punch: true
+
+  # respond means that a node you are trying to reach will connect back out to you if your hole punching fails
+  # this is extremely useful if one node is behind a difficult nat, such as a symmetric NAT
+  # Default is false
+  #respond: true
+
+  # delays a punch response for misbehaving NATs, default is 1 second, respond must be true to take effect
+  #delay: 1s
+
+# Cipher allows you to choose between the available ciphers for your network. Options are chachapoly or aes
 # IMPORTANT: this value must be identical on ALL NODES/LIGHTHOUSES. We do not/will not support use of different ciphers simultaneously!
 #cipher: chachapoly
 
-# Local range is used to define a hint about the local network range, which speeds up discovering the fastest
+# Preferred ranges is used to define a hint about the local network ranges, which speeds up discovering the fastest
 # path to a network adjacent nebula node.
-#local_range: "172.16.0.0/24"
+# NOTE: the previous option "local_range" only allowed definition of a single range
+# and has been deprecated for "preferred_ranges"
+#preferred_ranges: ["172.16.0.0/24"]
 
 # sshd can expose informational and administrative functions via ssh this is a
 #sshd:
@@ -84,9 +157,27 @@ punchy: true
       #keys:
         #- "ssh public key string"
 
+# EXPERIMENTAL: relay support for networks that can't establish direct connections.
+relay:
+  # Relays are a list of Nebula IP's that peers can use to relay packets to me.
+  # IPs in this list must have am_relay set to true in their configs, otherwise
+  # they will reject relay requests.
+  #relays:
+    #- 192.168.100.1
+    #- <other Nebula VPN IPs of hosts used as relays to access me>
+  # Set am_relay to true to permit other hosts to list my IP in their relays config. Default false.
+  am_relay: false
+  # Set use_relays to false to prevent this instance from attempting to establish connections through relays.
+  # default true
+  use_relays: true
+
 # Configure the private interface. Note: addr is baked into the nebula certificate
 tun:
-  # Name of the device
+  # When tun is disabled, a lighthouse can be started without a local tun interface (and therefore without root)
+  disabled: false
+  # Name of the device. If not set, a default will be chosen by the OS.
+  # For macOS: if set, must be in the form `utun[0-9]+`.
+  # For FreeBSD: Required to be set, must be in the form `tun[0-9]+`.
   dev: nebula1
   # Toggles forwarding of local broadcast packets, the address of which depends on the ip/mask encoded in pki.cert
   drop_local_broadcast: false
@@ -103,10 +194,13 @@ tun:
   # Unsafe routes allows you to route traffic over nebula to non-nebula nodes
   # Unsafe routes should be avoided unless you have hosts/services that cannot run nebula
   # NOTE: The nebula certificate of the "via" node *MUST* have the "route" defined as a subnet in its certificate
+  # `mtu` will default to tun mtu if this option is not specified
+  # `metric` will default to 0 if this option is not specified
   unsafe_routes:
     #- route: 172.16.1.0/24
     #  via: 192.168.100.99
-    #  mtu: 1300 #mtu will default to tun mtu if this option is not sepcified
+    #  mtu: 1300
+    #  metric: 100
 
 
 # TODO
@@ -116,6 +210,16 @@ logging:
   level: info
   # json or text formats currently available. Default is text
   format: text
+  # Disable timestamp logging. useful when output is redirected to logging system that already adds timestamps. Default is false
+  #disable_timestamp: true
+  # timestamp format is specified in Go time format, see:
+  #     https://golang.org/pkg/time/#pkg-constants
+  # default when `format: json`: "2006-01-02T15:04:05Z07:00" (RFC3339)
+  # default when `format: text`:
+  #     when TTY attached: seconds since beginning of execution
+  #     otherwise: "2006-01-02T15:04:05Z07:00" (RFC3339)
+  # As an example, to log as RFC3339 with millisecond precision, set to:
+  #timestamp_format: "2006-01-02T15:04:05.000Z07:00"
 
 #stats:
   #type: graphite
@@ -131,13 +235,33 @@ logging:
   #subsystem: nebula
   #interval: 10s
 
+  # enables counter metrics for meta packets
+  #   e.g.: `messages.tx.handshake`
+  # NOTE: `message.{tx,rx}.recv_error` is always emitted
+  #message_metrics: false
+
+  # enables detailed counter metrics for lighthouse packets
+  #   e.g.: `lighthouse.rx.HostQuery`
+  #lighthouse_metrics: false
+
+# Handshake Manager Settings
+#handshakes:
+  # Handshakes are sent to all known addresses at each interval with a linear backoff,
+  # Wait try_interval after the 1st attempt, 2 * try_interval after the 2nd, etc, until the handshake is older than timeout
+  # A 100ms interval with the default 10 retries will give a handshake 5.5 seconds to resolve before timing out
+  #try_interval: 100ms
+  #retries: 20
+  # trigger_buffer is the size of the buffer channel for quickly sending handshakes
+  # after receiving the response for lighthouse queries
+  #trigger_buffer: 64
+
+
 # Nebula security group configuration
 firewall:
   conntrack:
-    tcp_timeout: 120h
+    tcp_timeout: 12m
     udp_timeout: 3m
     default_timeout: 10m
-    max_connections: 100000
 
   # The firewall is default deny. There is no way to write a deny rule.
   # Rules are comprised of a protocol, port, and one or more of host, group, or CIDR

examples/quickstart-vagrant/README.md

@@ -119,7 +119,6 @@ firewall:
     tcp_timeout: 12m
     udp_timeout: 3m
     default_timeout: 10m
-    max_connections: 100,000
 
   inbound:
     - proto: icmp

examples/quickstart-vagrant/ansible/roles/nebula/files/systemd.nebula.service

@@ -5,8 +5,6 @@ After=basic.target network.target
 
 [Service]
 SyslogIdentifier=nebula
-StandardOutput=syslog
-StandardError=syslog
 ExecReload=/bin/kill -HUP $MAINPID
 ExecStart=/usr/local/bin/nebula -config /etc/nebula/config.yml
 Restart=always

examples/quickstart-vagrant/ansible/roles/nebula/templates/config.yml.j2

@@ -65,7 +65,6 @@ firewall:
     tcp_timeout: 12m
     udp_timeout: 3m
     default_timeout: 10m
-    max_connections: 100,000
 
   inbound:
     - proto: icmp

examples/service_scripts/nebula.service

@@ -2,11 +2,10 @@
 Description=nebula
 Wants=basic.target
 After=basic.target network.target
+Before=sshd.service
 
 [Service]
 SyslogIdentifier=nebula
-StandardOutput=syslog
-StandardError=syslog
 ExecReload=/bin/kill -HUP $MAINPID
 ExecStart=/usr/local/bin/nebula -config /etc/nebula/config.yml
 Restart=always

firewall.go

@@ -1,32 +1,24 @@
 package nebula
 
 import (
-	"encoding/binary"
-	"encoding/json"
-	"fmt"
-	"net"
-	"sync"
-	"time"
-
 	"crypto/sha256"
+	"encoding/binary"
 	"encoding/hex"
 	"errors"
+	"fmt"
+	"net"
 	"reflect"
 	"strconv"
 	"strings"
+	"sync"
+	"time"
 
 	"github.com/rcrowley/go-metrics"
+	"github.com/sirupsen/logrus"
 	"github.com/slackhq/nebula/cert"
-)
+	"github.com/slackhq/nebula/cidr"
-
+	"github.com/slackhq/nebula/config"
-const (
+	"github.com/slackhq/nebula/firewall"
-	fwProtoAny  = 0 // When we want to handle HOPOPT (0) we can change this, if ever
-	fwProtoTCP  = 6
-	fwProtoUDP  = 17
-	fwProtoICMP = 1
-
-	fwPortAny      = 0  // Special value for matching `port: any`
-	fwPortFragment = -1 // Special value for matching `port: fragment`
 )
 
 const tcpACK = 0x10
@@ -38,13 +30,19 @@ type FirewallInterface interface {
 
 type conn struct {
 	Expires time.Time // Time when this conntrack entry will expire
-	Seq     uint32    // If tcp rtt tracking is enabled this will be the seq we are looking for an ack
 	Sent    time.Time // If tcp rtt tracking is enabled this will be when Seq was last set
+	Seq     uint32    // If tcp rtt tracking is enabled this will be the seq we are looking for an ack
+
+	// record why the original connection passed the firewall, so we can re-validate
+	// after ruleset changes. Note, rulesVersion is a uint16 so that these two
+	// fields pack for free after the uint32 above
+	incoming     bool
+	rulesVersion uint16
 }
 
 // TODO: need conntrack max tracked connections handling
 type Firewall struct {
-	Conns map[FirewallPacket]*conn
+	Conntrack *FirewallConntrack
 
 	InRules  *FirewallTable
 	OutRules *FirewallTable
@@ -55,16 +53,31 @@ type Firewall struct {
 	UDPTimeout     time.Duration //linux: 180s max
 	DefaultTimeout time.Duration //linux: 600s
 
-	TimerWheel *TimerWheel
-
 	// Used to ensure we don't emit local packets for ips we don't own
-	localIps *CIDRTree
+	localIps *cidr.Tree4
 
-	connMutex sync.Mutex
 	rules        string
+	rulesVersion uint16
 
 	trackTCPRTT     bool
 	metricTCPRTT    metrics.Histogram
+	incomingMetrics firewallMetrics
+	outgoingMetrics firewallMetrics
+
+	l *logrus.Logger
+}
+
+type firewallMetrics struct {
+	droppedLocalIP  metrics.Counter
+	droppedRemoteIP metrics.Counter
+	droppedNoRule   metrics.Counter
+}
+
+type FirewallConntrack struct {
+	sync.Mutex
+
+	Conns      map[firewall.Packet]*conn
+	TimerWheel *TimerWheel
 }
 
 type FirewallTable struct {
@@ -94,57 +107,15 @@ type FirewallRule struct {
 	Any    bool
 	Hosts  map[string]struct{}
 	Groups [][]string
-	CIDR   *CIDRTree
+	CIDR   *cidr.Tree4
 }
 
 // Even though ports are uint16, int32 maps are faster for lookup
 // Plus we can use `-1` for fragment rules
 type firewallPort map[int32]*FirewallCA
 
-type FirewallPacket struct {
-	LocalIP    uint32
-	RemoteIP   uint32
-	LocalPort  uint16
-	RemotePort uint16
-	Protocol   uint8
-	Fragment   bool
-}
-
-func (fp *FirewallPacket) Copy() *FirewallPacket {
-	return &FirewallPacket{
-		LocalIP:    fp.LocalIP,
-		RemoteIP:   fp.RemoteIP,
-		LocalPort:  fp.LocalPort,
-		RemotePort: fp.RemotePort,
-		Protocol:   fp.Protocol,
-		Fragment:   fp.Fragment,
-	}
-}
-
-func (fp FirewallPacket) MarshalJSON() ([]byte, error) {
-	var proto string
-	switch fp.Protocol {
-	case fwProtoTCP:
-		proto = "tcp"
-	case fwProtoICMP:
-		proto = "icmp"
-	case fwProtoUDP:
-		proto = "udp"
-	default:
-		proto = fmt.Sprintf("unknown %v", fp.Protocol)
-	}
-	return json.Marshal(m{
-		"LocalIP":    int2ip(fp.LocalIP).String(),
-		"RemoteIP":   int2ip(fp.RemoteIP).String(),
-		"LocalPort":  fp.LocalPort,
-		"RemotePort": fp.RemotePort,
-		"Protocol":   proto,
-		"Fragment":   fp.Fragment,
-	})
-}
-
 // NewFirewall creates a new Firewall object. A TimerWheel is created for you from the provided timeouts.
-func NewFirewall(tcpTimeout, UDPTimeout, defaultTimeout time.Duration, c *cert.NebulaCertificate) *Firewall {
+func NewFirewall(l *logrus.Logger, tcpTimeout, UDPTimeout, defaultTimeout time.Duration, c *cert.NebulaCertificate) *Firewall {
 	//TODO: error on 0 duration
 	var min, max time.Duration
 
@@ -162,7 +133,7 @@ func NewFirewall(tcpTimeout, UDPTimeout, defaultTimeout time.Duration, c *cert.N
 		max = defaultTimeout
 	}
 
-	localIps := NewCIDRTree()
+	localIps := cidr.NewTree4()
 	for _, ip := range c.Details.Ips {
 		localIps.AddCIDR(&net.IPNet{IP: ip.IP, Mask: net.IPMask{255, 255, 255, 255}}, struct{}{})
 	}
@@ -172,20 +143,35 @@ func NewFirewall(tcpTimeout, UDPTimeout, defaultTimeout time.Duration, c *cert.N
 	}
 
 	return &Firewall{
-		Conns:          make(map[FirewallPacket]*conn),
+		Conntrack: &FirewallConntrack{
+			Conns:      make(map[firewall.Packet]*conn),
+			TimerWheel: NewTimerWheel(min, max),
+		},
 		InRules:        newFirewallTable(),
 		OutRules:       newFirewallTable(),
-		TimerWheel:     NewTimerWheel(min, max),
 		TCPTimeout:     tcpTimeout,
 		UDPTimeout:     UDPTimeout,
 		DefaultTimeout: defaultTimeout,
 		localIps:       localIps,
+		l:              l,
+
 		metricTCPRTT: metrics.GetOrRegisterHistogram("network.tcp.rtt", nil, metrics.NewExpDecaySample(1028, 0.015)),
+		incomingMetrics: firewallMetrics{
+			droppedLocalIP:  metrics.GetOrRegisterCounter("firewall.incoming.dropped.local_ip", nil),
+			droppedRemoteIP: metrics.GetOrRegisterCounter("firewall.incoming.dropped.remote_ip", nil),
+			droppedNoRule:   metrics.GetOrRegisterCounter("firewall.incoming.dropped.no_rule", nil),
+		},
+		outgoingMetrics: firewallMetrics{
+			droppedLocalIP:  metrics.GetOrRegisterCounter("firewall.outgoing.dropped.local_ip", nil),
+			droppedRemoteIP: metrics.GetOrRegisterCounter("firewall.outgoing.dropped.remote_ip", nil),
+			droppedNoRule:   metrics.GetOrRegisterCounter("firewall.outgoing.dropped.no_rule", nil),
+		},
 	}
 }
 
-func NewFirewallFromConfig(nc *cert.NebulaCertificate, c *Config) (*Firewall, error) {
+func NewFirewallFromConfig(l *logrus.Logger, nc *cert.NebulaCertificate, c *config.C) (*Firewall, error) {
 	fw := NewFirewall(
+		l,
 		c.GetDuration("firewall.conntrack.tcp_timeout", time.Minute*12),
 		c.GetDuration("firewall.conntrack.udp_timeout", time.Minute*3),
 		c.GetDuration("firewall.conntrack.default_timeout", time.Minute*10),
@@ -193,12 +179,12 @@ func NewFirewallFromConfig(nc *cert.NebulaCertificate, c *Config) (*Firewall, er
 		//TODO: max_connections
 	)
 
-	err := AddFirewallRulesFromConfig(false, c, fw)
+	err := AddFirewallRulesFromConfig(l, false, c, fw)
 	if err != nil {
 		return nil, err
 	}
 
-	err = AddFirewallRulesFromConfig(true, c, fw)
+	err = AddFirewallRulesFromConfig(l, true, c, fw)
 	if err != nil {
 		return nil, err
 	}
@@ -208,11 +194,17 @@ func NewFirewallFromConfig(nc *cert.NebulaCertificate, c *Config) (*Firewall, er
 
 // AddRule properly creates the in memory rule structure for a firewall table.
 func (f *Firewall) AddRule(incoming bool, proto uint8, startPort int32, endPort int32, groups []string, host string, ip *net.IPNet, caName string, caSha string) error {
+	// Under gomobile, stringing a nil pointer with fmt causes an abort in debug mode for iOS
+	// https://github.com/golang/go/issues/14131
+	sIp := ""
+	if ip != nil {
+		sIp = ip.String()
+	}
 
 	// We need this rule string because we generate a hash. Removing this will break firewall reload.
 	ruleString := fmt.Sprintf(
 		"incoming: %v, proto: %v, startPort: %v, endPort: %v, groups: %v, host: %v, ip: %v, caName: %v, caSha: %s",
-		incoming, proto, startPort, endPort, groups, host, ip, caName, caSha,
+		incoming, proto, startPort, endPort, groups, host, sIp, caName, caSha,
 	)
 	f.rules += ruleString + "\n"
 
@@ -220,7 +212,7 @@ func (f *Firewall) AddRule(incoming bool, proto uint8, startPort int32, endPort
 	if !incoming {
 		direction = "outgoing"
 	}
-	l.WithField("firewallRule", m{"direction": direction, "proto": proto, "startPort": startPort, "endPort": endPort, "groups": groups, "host": host, "ip": ip, "caName": caName, "caSha": caSha}).
+	f.l.WithField("firewallRule", m{"direction": direction, "proto": proto, "startPort": startPort, "endPort": endPort, "groups": groups, "host": host, "ip": sIp, "caName": caName, "caSha": caSha}).
 		Info("Firewall rule added")
 
 	var (
@@ -235,13 +227,13 @@ func (f *Firewall) AddRule(incoming bool, proto uint8, startPort int32, endPort
 	}
 
 	switch proto {
-	case fwProtoTCP:
+	case firewall.ProtoTCP:
 		fp = ft.TCP
-	case fwProtoUDP:
+	case firewall.ProtoUDP:
 		fp = ft.UDP
-	case fwProtoICMP:
+	case firewall.ProtoICMP:
 		fp = ft.ICMP
-	case fwProtoAny:
+	case firewall.ProtoAny:
 		fp = ft.AnyProto
 	default:
 		return fmt.Errorf("unknown protocol %v", proto)
@@ -256,7 +248,7 @@ func (f *Firewall) GetRuleHash() string {
 	return hex.EncodeToString(sum[:])
 }
 
-func AddFirewallRulesFromConfig(inbound bool, config *Config, fw FirewallInterface) error {
+func AddFirewallRulesFromConfig(l *logrus.Logger, inbound bool, c *config.C, fw FirewallInterface) error {
 	var table string
 	if inbound {
 		table = "firewall.inbound"
@@ -264,7 +256,7 @@ func AddFirewallRulesFromConfig(inbound bool, config *Config, fw FirewallInterfa
 		table = "firewall.outbound"
 	}
 
-	r := config.Get(table)
+	r := c.Get(table)
 	if r == nil {
 		return nil
 	}
@@ -276,7 +268,7 @@ func AddFirewallRulesFromConfig(inbound bool, config *Config, fw FirewallInterfa
 
 	for i, t := range rs {
 		var groups []string
-		r, err := convertRule(t, table, i)
+		r, err := convertRule(l, t, table, i)
 		if err != nil {
 			return fmt.Errorf("%s rule #%v; %s", table, i, err)
 		}
@@ -319,13 +311,13 @@ func AddFirewallRulesFromConfig(inbound bool, config *Config, fw FirewallInterfa
 		var proto uint8
 		switch r.Proto {
 		case "any":
-			proto = fwProtoAny
+			proto = firewall.ProtoAny
 		case "tcp":
-			proto = fwProtoTCP
+			proto = firewall.ProtoTCP
 		case "udp":
-			proto = fwProtoUDP
+			proto = firewall.ProtoUDP
 		case "icmp":
-			proto = fwProtoICMP
+			proto = firewall.ProtoICMP
 		default:
 			return fmt.Errorf("%s rule #%v; proto was not understood; `%s`", table, i, r.Proto)
 		}
@@ -347,20 +339,36 @@ func AddFirewallRulesFromConfig(inbound bool, config *Config, fw FirewallInterfa
 	return nil
 }
 
-func (f *Firewall) Drop(packet []byte, fp FirewallPacket, incoming bool, h *HostInfo, caPool *cert.NebulaCAPool) bool {
+var ErrInvalidRemoteIP = errors.New("remote IP is not in remote certificate subnets")
+var ErrInvalidLocalIP = errors.New("local IP is not in list of handled local IPs")
+var ErrNoMatchingRule = errors.New("no matching rule in firewall table")
+
+// Drop returns an error if the packet should be dropped, explaining why. It
+// returns nil if the packet should not be dropped.
+func (f *Firewall) Drop(packet []byte, fp firewall.Packet, incoming bool, h *HostInfo, caPool *cert.NebulaCAPool, localCache firewall.ConntrackCache) error {
 	// Check if we spoke to this tuple, if we did then allow this packet
-	if f.inConns(packet, fp, incoming) {
+	if f.inConns(packet, fp, incoming, h, caPool, localCache) {
-		return false
+		return nil
 	}
 
 	// Make sure remote address matches nebula certificate
-	if h.remoteCidr.Contains(fp.RemoteIP) == nil {
+	if remoteCidr := h.remoteCidr; remoteCidr != nil {
-		return true
+		if remoteCidr.Contains(fp.RemoteIP) == nil {
+			f.metrics(incoming).droppedRemoteIP.Inc(1)
+			return ErrInvalidRemoteIP
+		}
+	} else {
+		// Simple case: Certificate has one IP and no subnets
+		if fp.RemoteIP != h.vpnIp {
+			f.metrics(incoming).droppedRemoteIP.Inc(1)
+			return ErrInvalidRemoteIP
+		}
 	}
 
 	// Make sure we are supposed to be handling this local ip address
 	if f.localIps.Contains(fp.LocalIP) == nil {
-		return true
+		f.metrics(incoming).droppedLocalIP.Inc(1)
+		return ErrInvalidLocalIP
 	}
 
 	table := f.OutRules
@@ -370,13 +378,22 @@ func (f *Firewall) Drop(packet []byte, fp FirewallPacket, incoming bool, h *Host
 
 	// We now know which firewall table to check against
 	if !table.match(fp, incoming, h.ConnectionState.peerCert, caPool) {
-		return true
+		f.metrics(incoming).droppedNoRule.Inc(1)
+		return ErrNoMatchingRule
 	}
 
 	// We always want to conntrack since it is a faster operation
 	f.addConn(packet, fp, incoming)
 
-	return false
+	return nil
+}
+
+func (f *Firewall) metrics(incoming bool) firewallMetrics {
+	if incoming {
+		return f.incomingMetrics
+	} else {
+		return f.outgoingMetrics
+	}
 }
 
 // Destroy cleans up any known cyclical references so the object can be free'd my GC. This should be called if a new
@@ -386,77 +403,132 @@ func (f *Firewall) Destroy() {
 }
 
 func (f *Firewall) EmitStats() {
-	conntrackCount := len(f.Conns)
+	conntrack := f.Conntrack
+	conntrack.Lock()
+	conntrackCount := len(conntrack.Conns)
+	conntrack.Unlock()
 	metrics.GetOrRegisterGauge("firewall.conntrack.count", nil).Update(int64(conntrackCount))
+	metrics.GetOrRegisterGauge("firewall.rules.version", nil).Update(int64(f.rulesVersion))
 }
 
-func (f *Firewall) inConns(packet []byte, fp FirewallPacket, incoming bool) bool {
+func (f *Firewall) inConns(packet []byte, fp firewall.Packet, incoming bool, h *HostInfo, caPool *cert.NebulaCAPool, localCache firewall.ConntrackCache) bool {
-	f.connMutex.Lock()
+	if localCache != nil {
+		if _, ok := localCache[fp]; ok {
+			return true
+		}
+	}
+	conntrack := f.Conntrack
+	conntrack.Lock()
 
 	// Purge every time we test
-	ep, has := f.TimerWheel.Purge()
+	ep, has := conntrack.TimerWheel.Purge()
 	if has {
 		f.evict(ep)
 	}
 
-	c, ok := f.Conns[fp]
+	c, ok := conntrack.Conns[fp]
 
 	if !ok {
-		f.connMutex.Unlock()
+		conntrack.Unlock()
 		return false
 	}
 
+	if c.rulesVersion != f.rulesVersion {
+		// This conntrack entry was for an older rule set, validate
+		// it still passes with the current rule set
+		table := f.OutRules
+		if c.incoming {
+			table = f.InRules
+		}
+
+		// We now know which firewall table to check against
+		if !table.match(fp, c.incoming, h.ConnectionState.peerCert, caPool) {
+			if f.l.Level >= logrus.DebugLevel {
+				h.logger(f.l).
+					WithField("fwPacket", fp).
+					WithField("incoming", c.incoming).
+					WithField("rulesVersion", f.rulesVersion).
+					WithField("oldRulesVersion", c.rulesVersion).
+					Debugln("dropping old conntrack entry, does not match new ruleset")
+			}
+			delete(conntrack.Conns, fp)
+			conntrack.Unlock()
+			return false
+		}
+
+		if f.l.Level >= logrus.DebugLevel {
+			h.logger(f.l).
+				WithField("fwPacket", fp).
+				WithField("incoming", c.incoming).
+				WithField("rulesVersion", f.rulesVersion).
+				WithField("oldRulesVersion", c.rulesVersion).
+				Debugln("keeping old conntrack entry, does match new ruleset")
+		}
+
+		c.rulesVersion = f.rulesVersion
+	}
+
 	switch fp.Protocol {
-	case fwProtoTCP:
+	case firewall.ProtoTCP:
 		c.Expires = time.Now().Add(f.TCPTimeout)
 		if incoming {
 			f.checkTCPRTT(c, packet)
 		} else {
 			setTCPRTTTracking(c, packet)
 		}
-	case fwProtoUDP:
+	case firewall.ProtoUDP:
 		c.Expires = time.Now().Add(f.UDPTimeout)
 	default:
 		c.Expires = time.Now().Add(f.DefaultTimeout)
 	}
 
-	f.connMutex.Unlock()
+	conntrack.Unlock()
+
+	if localCache != nil {
+		localCache[fp] = struct{}{}
+	}
 
 	return true
 }
 
-func (f *Firewall) addConn(packet []byte, fp FirewallPacket, incoming bool) {
+func (f *Firewall) addConn(packet []byte, fp firewall.Packet, incoming bool) {
 	var timeout time.Duration
 	c := &conn{}
 
 	switch fp.Protocol {
-	case fwProtoTCP:
+	case firewall.ProtoTCP:
 		timeout = f.TCPTimeout
 		if !incoming {
 			setTCPRTTTracking(c, packet)
 		}
-	case fwProtoUDP:
+	case firewall.ProtoUDP:
 		timeout = f.UDPTimeout
 	default:
 		timeout = f.DefaultTimeout
 	}
 
-	f.connMutex.Lock()
+	conntrack := f.Conntrack
-	if _, ok := f.Conns[fp]; !ok {
+	conntrack.Lock()
-		f.TimerWheel.Add(fp, timeout)
+	if _, ok := conntrack.Conns[fp]; !ok {
+		conntrack.TimerWheel.Add(fp, timeout)
 	}
 
+	// Record which rulesVersion allowed this connection, so we can retest after
+	// firewall reload
+	c.incoming = incoming
+	c.rulesVersion = f.rulesVersion
 	c.Expires = time.Now().Add(timeout)
-	f.Conns[fp] = c
+	conntrack.Conns[fp] = c
-	f.connMutex.Unlock()
+	conntrack.Unlock()
 }
 
 // Evict checks if a conntrack entry has expired, if so it is removed, if not it is re-added to the wheel
 // Caller must own the connMutex lock!
-func (f *Firewall) evict(p FirewallPacket) {
+func (f *Firewall) evict(p firewall.Packet) {
 	//TODO: report a stat if the tcp rtt tracking was never resolved?
 	// Are we still tracking this conn?
-	t, ok := f.Conns[p]
+	conntrack := f.Conntrack
+	t, ok := conntrack.Conns[p]
 	if !ok {
 		return
 	}
@@ -465,29 +537,29 @@ func (f *Firewall) evict(p FirewallPacket) {
 
 	// Timeout is in the future, re-add the timer
 	if newT > 0 {
-		f.TimerWheel.Add(p, newT)
+		conntrack.TimerWheel.Add(p, newT)
 		return
 	}
 
 	// This conn is done
-	delete(f.Conns, p)
+	delete(conntrack.Conns, p)
 }
 
-func (ft *FirewallTable) match(p FirewallPacket, incoming bool, c *cert.NebulaCertificate, caPool *cert.NebulaCAPool) bool {
+func (ft *FirewallTable) match(p firewall.Packet, incoming bool, c *cert.NebulaCertificate, caPool *cert.NebulaCAPool) bool {
 	if ft.AnyProto.match(p, incoming, c, caPool) {
 		return true
 	}
 
 	switch p.Protocol {
-	case fwProtoTCP:
+	case firewall.ProtoTCP:
 		if ft.TCP.match(p, incoming, c, caPool) {
 			return true
 		}
-	case fwProtoUDP:
+	case firewall.ProtoUDP:
 		if ft.UDP.match(p, incoming, c, caPool) {
 			return true
 		}
-	case fwProtoICMP:
+	case firewall.ProtoICMP:
 		if ft.ICMP.match(p, incoming, c, caPool) {
 			return true
 		}
@@ -517,7 +589,7 @@ func (fp firewallPort) addRule(startPort int32, endPort int32, groups []string,
 	return nil
 }
 
-func (fp firewallPort) match(p FirewallPacket, incoming bool, c *cert.NebulaCertificate, caPool *cert.NebulaCAPool) bool {
+func (fp firewallPort) match(p firewall.Packet, incoming bool, c *cert.NebulaCertificate, caPool *cert.NebulaCAPool) bool {
 	// We don't have any allowed ports, bail
 	if fp == nil {
 		return false
@@ -526,7 +598,7 @@ func (fp firewallPort) match(p FirewallPacket, incoming bool, c *cert.NebulaCert
 	var port int32
 
 	if p.Fragment {
-		port = fwPortFragment
+		port = firewall.PortFragment
 	} else if incoming {
 		port = int32(p.LocalPort)
 	} else {
@@ -537,7 +609,7 @@ func (fp firewallPort) match(p FirewallPacket, incoming bool, c *cert.NebulaCert
 		return true
 	}
 
-	return fp[fwPortAny].match(p, c, caPool)
+	return fp[firewall.PortAny].match(p, c, caPool)
 }
 
 func (fc *FirewallCA) addRule(groups []string, host string, ip *net.IPNet, caName, caSha string) error {
@@ -545,7 +617,7 @@ func (fc *FirewallCA) addRule(groups []string, host string, ip *net.IPNet, caNam
 		return &FirewallRule{
 			Hosts:  make(map[string]struct{}),
 			Groups: make([][]string, 0),
-			CIDR:   NewCIDRTree(),
+			CIDR:   cidr.NewTree4(),
 		}
 	}
 
@@ -580,7 +652,7 @@ func (fc *FirewallCA) addRule(groups []string, host string, ip *net.IPNet, caNam
 	return nil
 }
 
-func (fc *FirewallCA) match(p FirewallPacket, c *cert.NebulaCertificate, caPool *cert.NebulaCAPool) bool {
+func (fc *FirewallCA) match(p firewall.Packet, c *cert.NebulaCertificate, caPool *cert.NebulaCAPool) bool {
 	if fc == nil {
 		return false
 	}
@@ -613,7 +685,7 @@ func (fr *FirewallRule) addRule(groups []string, host string, ip *net.IPNet) err
 		// If it's any we need to wipe out any pre-existing rules to save on memory
 		fr.Groups = make([][]string, 0)
 		fr.Hosts = make(map[string]struct{})
-		fr.CIDR = NewCIDRTree()
+		fr.CIDR = cidr.NewTree4()
 	} else {
 		if len(groups) > 0 {
 			fr.Groups = append(fr.Groups, groups)
@@ -653,7 +725,7 @@ func (fr *FirewallRule) isAny(groups []string, host string, ip *net.IPNet) bool
 	return false
 }
 
-func (fr *FirewallRule) match(p FirewallPacket, c *cert.NebulaCertificate) bool {
+func (fr *FirewallRule) match(p firewall.Packet, c *cert.NebulaCertificate) bool {
 	if fr == nil {
 		return false
 	}
@@ -707,7 +779,7 @@ type rule struct {
 	CASha  string
 }
 
-func convertRule(p interface{}, table string, i int) (rule, error) {
+func convertRule(l *logrus.Logger, p interface{}, table string, i int) (rule, error) {
 	r := rule{}
 
 	m, ok := p.(map[interface{}]interface{})
@@ -762,12 +834,12 @@ func convertRule(p interface{}, table string, i int) (rule, error) {
 
 func parsePort(s string) (startPort, endPort int32, err error) {
 	if s == "any" {
-		startPort = fwPortAny
+		startPort = firewall.PortAny
-		endPort = fwPortAny
+		endPort = firewall.PortAny
 
 	} else if s == "fragment" {
-		startPort = fwPortFragment
+		startPort = firewall.PortFragment
-		endPort = fwPortFragment
+		endPort = firewall.PortFragment
 
 	} else if strings.Contains(s, `-`) {
 		sPorts := strings.SplitN(s, `-`, 2)
@@ -791,8 +863,8 @@ func parsePort(s string) (startPort, endPort int32, err error) {
 		startPort = int32(rStartPort)
 		endPort = int32(rEndPort)
 
-		if startPort == fwPortAny {
+		if startPort == firewall.PortAny {
-			endPort = fwPortAny
+			endPort = firewall.PortAny
 		}
 
 	} else {

firewall/cache.go

@@ -0,0 +1,59 @@
+package firewall
+
+import (
+	"sync/atomic"
+	"time"
+
+	"github.com/sirupsen/logrus"
+)
+
+// ConntrackCache is used as a local routine cache to know if a given flow
+// has been seen in the conntrack table.
+type ConntrackCache map[Packet]struct{}
+
+type ConntrackCacheTicker struct {
+	cacheV    uint64
+	cacheTick uint64
+
+	cache ConntrackCache
+}
+
+func NewConntrackCacheTicker(d time.Duration) *ConntrackCacheTicker {
+	if d == 0 {
+		return nil
+	}
+
+	c := &ConntrackCacheTicker{
+		cache: ConntrackCache{},
+	}
+
+	go c.tick(d)
+
+	return c
+}
+
+func (c *ConntrackCacheTicker) tick(d time.Duration) {
+	for {
+		time.Sleep(d)
+		atomic.AddUint64(&c.cacheTick, 1)
+	}
+}
+
+// Get checks if the cache ticker has moved to the next version before returning
+// the map. If it has moved, we reset the map.
+func (c *ConntrackCacheTicker) Get(l *logrus.Logger) ConntrackCache {
+	if c == nil {
+		return nil
+	}
+	if tick := atomic.LoadUint64(&c.cacheTick); tick != c.cacheV {
+		c.cacheV = tick
+		if ll := len(c.cache); ll > 0 {
+			if l.Level == logrus.DebugLevel {
+				l.WithField("len", ll).Debug("resetting conntrack cache")
+			}
+			c.cache = make(ConntrackCache, ll)
+		}
+	}
+
+	return c.cache
+}

firewall/packet.go

@@ -0,0 +1,62 @@
+package firewall
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/slackhq/nebula/iputil"
+)
+
+type m map[string]interface{}
+
+const (
+	ProtoAny  = 0 // When we want to handle HOPOPT (0) we can change this, if ever
+	ProtoTCP  = 6
+	ProtoUDP  = 17
+	ProtoICMP = 1
+
+	PortAny      = 0  // Special value for matching `port: any`
+	PortFragment = -1 // Special value for matching `port: fragment`
+)
+
+type Packet struct {
+	LocalIP    iputil.VpnIp
+	RemoteIP   iputil.VpnIp
+	LocalPort  uint16
+	RemotePort uint16
+	Protocol   uint8
+	Fragment   bool
+}
+
+func (fp *Packet) Copy() *Packet {
+	return &Packet{
+		LocalIP:    fp.LocalIP,
+		RemoteIP:   fp.RemoteIP,
+		LocalPort:  fp.LocalPort,
+		RemotePort: fp.RemotePort,
+		Protocol:   fp.Protocol,
+		Fragment:   fp.Fragment,
+	}
+}
+
+func (fp Packet) MarshalJSON() ([]byte, error) {
+	var proto string
+	switch fp.Protocol {
+	case ProtoTCP:
+		proto = "tcp"
+	case ProtoICMP:
+		proto = "icmp"
+	case ProtoUDP:
+		proto = "udp"
+	default:
+		proto = fmt.Sprintf("unknown %v", fp.Protocol)
+	}
+	return json.Marshal(m{
+		"LocalIP":    fp.LocalIP.String(),
+		"RemoteIP":   fp.RemoteIP.String(),
+		"LocalPort":  fp.LocalPort,
+		"RemotePort": fp.RemotePort,
+		"Protocol":   proto,
+		"Fragment":   fp.Fragment,
+	})
+}

firewall_test.go

@@ -11,145 +11,138 @@ import (
 
 	"github.com/rcrowley/go-metrics"
 	"github.com/slackhq/nebula/cert"
+	"github.com/slackhq/nebula/config"
+	"github.com/slackhq/nebula/firewall"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/test"
 	"github.com/stretchr/testify/assert"
 )
 
 func TestNewFirewall(t *testing.T) {
+	l := test.NewLogger()
 	c := &cert.NebulaCertificate{}
-	fw := NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	assert.NotNil(t, fw.Conns)
+	conntrack := fw.Conntrack
+	assert.NotNil(t, conntrack)
+	assert.NotNil(t, conntrack.Conns)
+	assert.NotNil(t, conntrack.TimerWheel)
 	assert.NotNil(t, fw.InRules)
 	assert.NotNil(t, fw.OutRules)
-	assert.NotNil(t, fw.TimerWheel)
 	assert.Equal(t, time.Second, fw.TCPTimeout)
 	assert.Equal(t, time.Minute, fw.UDPTimeout)
 	assert.Equal(t, time.Hour, fw.DefaultTimeout)
 
-	assert.Equal(t, time.Hour, fw.TimerWheel.wheelDuration)
+	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
-	assert.Equal(t, time.Hour, fw.TimerWheel.wheelDuration)
+	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
-	assert.Equal(t, 3601, fw.TimerWheel.wheelLen)
+	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 
-	fw = NewFirewall(time.Second, time.Hour, time.Minute, c)
+	fw = NewFirewall(l, time.Second, time.Hour, time.Minute, c)
-	assert.Equal(t, time.Hour, fw.TimerWheel.wheelDuration)
+	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
-	assert.Equal(t, 3601, fw.TimerWheel.wheelLen)
+	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 
-	fw = NewFirewall(time.Hour, time.Second, time.Minute, c)
+	fw = NewFirewall(l, time.Hour, time.Second, time.Minute, c)
-	assert.Equal(t, time.Hour, fw.TimerWheel.wheelDuration)
+	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
-	assert.Equal(t, 3601, fw.TimerWheel.wheelLen)
+	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 
-	fw = NewFirewall(time.Hour, time.Minute, time.Second, c)
+	fw = NewFirewall(l, time.Hour, time.Minute, time.Second, c)
-	assert.Equal(t, time.Hour, fw.TimerWheel.wheelDuration)
+	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
-	assert.Equal(t, 3601, fw.TimerWheel.wheelLen)
+	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 
-	fw = NewFirewall(time.Minute, time.Hour, time.Second, c)
+	fw = NewFirewall(l, time.Minute, time.Hour, time.Second, c)
-	assert.Equal(t, time.Hour, fw.TimerWheel.wheelDuration)
+	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
-	assert.Equal(t, 3601, fw.TimerWheel.wheelLen)
+	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 
-	fw = NewFirewall(time.Minute, time.Second, time.Hour, c)
+	fw = NewFirewall(l, time.Minute, time.Second, time.Hour, c)
-	assert.Equal(t, time.Hour, fw.TimerWheel.wheelDuration)
+	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
-	assert.Equal(t, 3601, fw.TimerWheel.wheelLen)
+	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 }
 
 func TestFirewall_AddRule(t *testing.T) {
+	l := test.NewLogger()
 	ob := &bytes.Buffer{}
-	out := l.Out
 	l.SetOutput(ob)
-	defer l.SetOutput(out)
 
 	c := &cert.NebulaCertificate{}
-	fw := NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	assert.NotNil(t, fw.InRules)
 	assert.NotNil(t, fw.OutRules)
 
 	_, ti, _ := net.ParseCIDR("1.2.3.4/32")
 
-	assert.Nil(t, fw.AddRule(true, fwProtoTCP, 1, 1, []string{}, "", nil, "", ""))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoTCP, 1, 1, []string{}, "", nil, "", ""))
 	// An empty rule is any
 	assert.True(t, fw.InRules.TCP[1].Any.Any)
 	assert.Empty(t, fw.InRules.TCP[1].Any.Groups)
 	assert.Empty(t, fw.InRules.TCP[1].Any.Hosts)
-	assert.Nil(t, fw.InRules.TCP[1].Any.CIDR.root.left)
-	assert.Nil(t, fw.InRules.TCP[1].Any.CIDR.root.right)
-	assert.Nil(t, fw.InRules.TCP[1].Any.CIDR.root.value)
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	assert.Nil(t, fw.AddRule(true, fwProtoUDP, 1, 1, []string{"g1"}, "", nil, "", ""))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoUDP, 1, 1, []string{"g1"}, "", nil, "", ""))
 	assert.False(t, fw.InRules.UDP[1].Any.Any)
 	assert.Contains(t, fw.InRules.UDP[1].Any.Groups[0], "g1")
 	assert.Empty(t, fw.InRules.UDP[1].Any.Hosts)
-	assert.Nil(t, fw.InRules.UDP[1].Any.CIDR.root.left)
-	assert.Nil(t, fw.InRules.UDP[1].Any.CIDR.root.right)
-	assert.Nil(t, fw.InRules.UDP[1].Any.CIDR.root.value)
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	assert.Nil(t, fw.AddRule(true, fwProtoICMP, 1, 1, []string{}, "h1", nil, "", ""))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoICMP, 1, 1, []string{}, "h1", nil, "", ""))
 	assert.False(t, fw.InRules.ICMP[1].Any.Any)
 	assert.Empty(t, fw.InRules.ICMP[1].Any.Groups)
 	assert.Contains(t, fw.InRules.ICMP[1].Any.Hosts, "h1")
-	assert.Nil(t, fw.InRules.ICMP[1].Any.CIDR.root.left)
-	assert.Nil(t, fw.InRules.ICMP[1].Any.CIDR.root.right)
-	assert.Nil(t, fw.InRules.ICMP[1].Any.CIDR.root.value)
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	assert.Nil(t, fw.AddRule(false, fwProtoAny, 1, 1, []string{}, "", ti, "", ""))
+	assert.Nil(t, fw.AddRule(false, firewall.ProtoAny, 1, 1, []string{}, "", ti, "", ""))
 	assert.False(t, fw.OutRules.AnyProto[1].Any.Any)
 	assert.Empty(t, fw.OutRules.AnyProto[1].Any.Groups)
 	assert.Empty(t, fw.OutRules.AnyProto[1].Any.Hosts)
-	assert.NotNil(t, fw.OutRules.AnyProto[1].Any.CIDR.Match(ip2int(ti.IP)))
+	assert.NotNil(t, fw.OutRules.AnyProto[1].Any.CIDR.Match(iputil.Ip2VpnIp(ti.IP)))
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	assert.Nil(t, fw.AddRule(true, fwProtoUDP, 1, 1, []string{"g1"}, "", nil, "ca-name", ""))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoUDP, 1, 1, []string{"g1"}, "", nil, "ca-name", ""))
 	assert.Contains(t, fw.InRules.UDP[1].CANames, "ca-name")
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	assert.Nil(t, fw.AddRule(true, fwProtoUDP, 1, 1, []string{"g1"}, "", nil, "", "ca-sha"))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoUDP, 1, 1, []string{"g1"}, "", nil, "", "ca-sha"))
 	assert.Contains(t, fw.InRules.UDP[1].CAShas, "ca-sha")
 
 	// Set any and clear fields
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	assert.Nil(t, fw.AddRule(false, fwProtoAny, 0, 0, []string{"g1", "g2"}, "h1", ti, "", ""))
+	assert.Nil(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{"g1", "g2"}, "h1", ti, "", ""))
 	assert.Equal(t, []string{"g1", "g2"}, fw.OutRules.AnyProto[0].Any.Groups[0])
 	assert.Contains(t, fw.OutRules.AnyProto[0].Any.Hosts, "h1")
-	assert.NotNil(t, fw.OutRules.AnyProto[0].Any.CIDR.Match(ip2int(ti.IP)))
+	assert.NotNil(t, fw.OutRules.AnyProto[0].Any.CIDR.Match(iputil.Ip2VpnIp(ti.IP)))
 
 	// run twice just to make sure
 	//TODO: these ANY rules should clear the CA firewall portion
-	assert.Nil(t, fw.AddRule(false, fwProtoAny, 0, 0, []string{"any"}, "", nil, "", ""))
+	assert.Nil(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{"any"}, "", nil, "", ""))
-	assert.Nil(t, fw.AddRule(false, fwProtoAny, 0, 0, []string{}, "any", nil, "", ""))
+	assert.Nil(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{}, "any", nil, "", ""))
 	assert.True(t, fw.OutRules.AnyProto[0].Any.Any)
 	assert.Empty(t, fw.OutRules.AnyProto[0].Any.Groups)
 	assert.Empty(t, fw.OutRules.AnyProto[0].Any.Hosts)
-	assert.Nil(t, fw.OutRules.AnyProto[0].Any.CIDR.root.left)
-	assert.Nil(t, fw.OutRules.AnyProto[0].Any.CIDR.root.right)
-	assert.Nil(t, fw.OutRules.AnyProto[0].Any.CIDR.root.value)
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	assert.Nil(t, fw.AddRule(false, fwProtoAny, 0, 0, []string{}, "any", nil, "", ""))
+	assert.Nil(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{}, "any", nil, "", ""))
 	assert.True(t, fw.OutRules.AnyProto[0].Any.Any)
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	_, anyIp, _ := net.ParseCIDR("0.0.0.0/0")
-	assert.Nil(t, fw.AddRule(false, fwProtoAny, 0, 0, []string{}, "", anyIp, "", ""))
+	assert.Nil(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{}, "", anyIp, "", ""))
 	assert.True(t, fw.OutRules.AnyProto[0].Any.Any)
 
 	// Test error conditions
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	assert.Error(t, fw.AddRule(true, math.MaxUint8, 0, 0, []string{}, "", nil, "", ""))
-	assert.Error(t, fw.AddRule(true, fwProtoAny, 10, 0, []string{}, "", nil, "", ""))
+	assert.Error(t, fw.AddRule(true, firewall.ProtoAny, 10, 0, []string{}, "", nil, "", ""))
 }
 
 func TestFirewall_Drop(t *testing.T) {
+	l := test.NewLogger()
 	ob := &bytes.Buffer{}
-	out := l.Out
 	l.SetOutput(ob)
-	defer l.SetOutput(out)
 
-	p := FirewallPacket{
+	p := firewall.Packet{
-		ip2int(net.IPv4(1, 2, 3, 4)),
+		iputil.Ip2VpnIp(net.IPv4(1, 2, 3, 4)),
-		ip2int(net.IPv4(1, 2, 3, 4)),
+		iputil.Ip2VpnIp(net.IPv4(1, 2, 3, 4)),
 		10,
 		90,
-		fwProtoUDP,
+		firewall.ProtoUDP,
 		false,
 	}
 
@@ -171,52 +164,53 @@ func TestFirewall_Drop(t *testing.T) {
 		ConnectionState: &ConnectionState{
 			peerCert: &c,
 		},
+		vpnIp: iputil.Ip2VpnIp(ipNet.IP),
 	}
 	h.CreateRemoteCIDR(&c)
 
-	fw := NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"any"}, "", nil, "", ""))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"any"}, "", nil, "", ""))
 	cp := cert.NewCAPool()
 
 	// Drop outbound
-	assert.True(t, fw.Drop([]byte{}, p, false, &h, cp))
+	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp, nil), ErrNoMatchingRule)
 	// Allow inbound
 	resetConntrack(fw)
-	assert.False(t, fw.Drop([]byte{}, p, true, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp, nil))
 	// Allow outbound because conntrack
-	assert.False(t, fw.Drop([]byte{}, p, false, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, false, &h, cp, nil))
 
 	// test remote mismatch
 	oldRemote := p.RemoteIP
-	p.RemoteIP = ip2int(net.IPv4(1, 2, 3, 10))
+	p.RemoteIP = iputil.Ip2VpnIp(net.IPv4(1, 2, 3, 10))
-	assert.True(t, fw.Drop([]byte{}, p, false, &h, cp))
+	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp, nil), ErrInvalidRemoteIP)
 	p.RemoteIP = oldRemote
 
 	// ensure signer doesn't get in the way of group checks
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"nope"}, "", nil, "", "signer-shasum"))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", nil, "", "signer-shasum"))
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"default-group"}, "", nil, "", "signer-shasum-bad"))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", nil, "", "signer-shasum-bad"))
-	assert.True(t, fw.Drop([]byte{}, p, true, &h, cp))
+	assert.Equal(t, fw.Drop([]byte{}, p, true, &h, cp, nil), ErrNoMatchingRule)
 
 	// test caSha doesn't drop on match
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"nope"}, "", nil, "", "signer-shasum-bad"))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", nil, "", "signer-shasum-bad"))
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"default-group"}, "", nil, "", "signer-shasum"))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", nil, "", "signer-shasum"))
-	assert.False(t, fw.Drop([]byte{}, p, true, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp, nil))
 
 	// ensure ca name doesn't get in the way of group checks
 	cp.CAs["signer-shasum"] = &cert.NebulaCertificate{Details: cert.NebulaCertificateDetails{Name: "ca-good"}}
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"nope"}, "", nil, "ca-good", ""))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", nil, "ca-good", ""))
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"default-group"}, "", nil, "ca-good-bad", ""))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", nil, "ca-good-bad", ""))
-	assert.True(t, fw.Drop([]byte{}, p, true, &h, cp))
+	assert.Equal(t, fw.Drop([]byte{}, p, true, &h, cp, nil), ErrNoMatchingRule)
 
 	// test caName doesn't drop on match
 	cp.CAs["signer-shasum"] = &cert.NebulaCertificate{Details: cert.NebulaCertificateDetails{Name: "ca-good"}}
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"nope"}, "", nil, "ca-good-bad", ""))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", nil, "ca-good-bad", ""))
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"default-group"}, "", nil, "ca-good", ""))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", nil, "ca-good", ""))
-	assert.False(t, fw.Drop([]byte{}, p, true, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp, nil))
 }
 
 func BenchmarkFirewallTable_match(b *testing.B) {
@@ -235,14 +229,14 @@ func BenchmarkFirewallTable_match(b *testing.B) {
 	b.Run("fail on proto", func(b *testing.B) {
 		c := &cert.NebulaCertificate{}
 		for n := 0; n < b.N; n++ {
-			ft.match(FirewallPacket{Protocol: fwProtoUDP}, true, c, cp)
+			ft.match(firewall.Packet{Protocol: firewall.ProtoUDP}, true, c, cp)
 		}
 	})
 
 	b.Run("fail on port", func(b *testing.B) {
 		c := &cert.NebulaCertificate{}
 		for n := 0; n < b.N; n++ {
-			ft.match(FirewallPacket{Protocol: fwProtoTCP, LocalPort: 1}, true, c, cp)
+			ft.match(firewall.Packet{Protocol: firewall.ProtoTCP, LocalPort: 1}, true, c, cp)
 		}
 	})
 
@@ -256,7 +250,7 @@ func BenchmarkFirewallTable_match(b *testing.B) {
 			},
 		}
 		for n := 0; n < b.N; n++ {
-			ft.match(FirewallPacket{Protocol: fwProtoTCP, LocalPort: 10}, true, c, cp)
+			ft.match(firewall.Packet{Protocol: firewall.ProtoTCP, LocalPort: 10}, true, c, cp)
 		}
 	})
 
@@ -268,7 +262,7 @@ func BenchmarkFirewallTable_match(b *testing.B) {
 			},
 		}
 		for n := 0; n < b.N; n++ {
-			ft.match(FirewallPacket{Protocol: fwProtoTCP, LocalPort: 10}, true, c, cp)
+			ft.match(firewall.Packet{Protocol: firewall.ProtoTCP, LocalPort: 10}, true, c, cp)
 		}
 	})
 
@@ -280,12 +274,12 @@ func BenchmarkFirewallTable_match(b *testing.B) {
 			},
 		}
 		for n := 0; n < b.N; n++ {
-			ft.match(FirewallPacket{Protocol: fwProtoTCP, LocalPort: 10}, true, c, cp)
+			ft.match(firewall.Packet{Protocol: firewall.ProtoTCP, LocalPort: 10}, true, c, cp)
 		}
 	})
 
 	b.Run("pass on ip", func(b *testing.B) {
-		ip := ip2int(net.IPv4(172, 1, 1, 1))
+		ip := iputil.Ip2VpnIp(net.IPv4(172, 1, 1, 1))
 		c := &cert.NebulaCertificate{
 			Details: cert.NebulaCertificateDetails{
 				InvertedGroups: map[string]struct{}{"nope": {}},
@@ -293,14 +287,14 @@ func BenchmarkFirewallTable_match(b *testing.B) {
 			},
 		}
 		for n := 0; n < b.N; n++ {
-			ft.match(FirewallPacket{Protocol: fwProtoTCP, LocalPort: 10, RemoteIP: ip}, true, c, cp)
+			ft.match(firewall.Packet{Protocol: firewall.ProtoTCP, LocalPort: 10, RemoteIP: ip}, true, c, cp)
 		}
 	})
 
 	_ = ft.TCP.addRule(0, 0, []string{"good-group"}, "good-host", n, "", "")
 
 	b.Run("pass on ip with any port", func(b *testing.B) {
-		ip := ip2int(net.IPv4(172, 1, 1, 1))
+		ip := iputil.Ip2VpnIp(net.IPv4(172, 1, 1, 1))
 		c := &cert.NebulaCertificate{
 			Details: cert.NebulaCertificateDetails{
 				InvertedGroups: map[string]struct{}{"nope": {}},
@@ -308,23 +302,22 @@ func BenchmarkFirewallTable_match(b *testing.B) {
 			},
 		}
 		for n := 0; n < b.N; n++ {
-			ft.match(FirewallPacket{Protocol: fwProtoTCP, LocalPort: 100, RemoteIP: ip}, true, c, cp)
+			ft.match(firewall.Packet{Protocol: firewall.ProtoTCP, LocalPort: 100, RemoteIP: ip}, true, c, cp)
 		}
 	})
 }
 
 func TestFirewall_Drop2(t *testing.T) {
+	l := test.NewLogger()
 	ob := &bytes.Buffer{}
-	out := l.Out
 	l.SetOutput(ob)
-	defer l.SetOutput(out)
 
-	p := FirewallPacket{
+	p := firewall.Packet{
-		ip2int(net.IPv4(1, 2, 3, 4)),
+		iputil.Ip2VpnIp(net.IPv4(1, 2, 3, 4)),
-		ip2int(net.IPv4(1, 2, 3, 4)),
+		iputil.Ip2VpnIp(net.IPv4(1, 2, 3, 4)),
 		10,
 		90,
-		fwProtoUDP,
+		firewall.ProtoUDP,
 		false,
 	}
 
@@ -344,6 +337,7 @@ func TestFirewall_Drop2(t *testing.T) {
 		ConnectionState: &ConnectionState{
 			peerCert: &c,
 		},
+		vpnIp: iputil.Ip2VpnIp(ipNet.IP),
 	}
 	h.CreateRemoteCIDR(&c)
 
@@ -361,29 +355,28 @@ func TestFirewall_Drop2(t *testing.T) {
 	}
 	h1.CreateRemoteCIDR(&c1)
 
-	fw := NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"default-group", "test-group"}, "", nil, "", ""))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group", "test-group"}, "", nil, "", ""))
 	cp := cert.NewCAPool()
 
 	// h1/c1 lacks the proper groups
-	assert.True(t, fw.Drop([]byte{}, p, true, &h1, cp))
+	assert.Error(t, fw.Drop([]byte{}, p, true, &h1, cp, nil), ErrNoMatchingRule)
 	// c has the proper groups
 	resetConntrack(fw)
-	assert.False(t, fw.Drop([]byte{}, p, true, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp, nil))
 }
 
 func TestFirewall_Drop3(t *testing.T) {
+	l := test.NewLogger()
 	ob := &bytes.Buffer{}
-	out := l.Out
 	l.SetOutput(ob)
-	defer l.SetOutput(out)
 
-	p := FirewallPacket{
+	p := firewall.Packet{
-		ip2int(net.IPv4(1, 2, 3, 4)),
+		iputil.Ip2VpnIp(net.IPv4(1, 2, 3, 4)),
-		ip2int(net.IPv4(1, 2, 3, 4)),
+		iputil.Ip2VpnIp(net.IPv4(1, 2, 3, 4)),
 		1,
 		1,
-		fwProtoUDP,
+		firewall.ProtoUDP,
 		false,
 	}
 
@@ -410,6 +403,7 @@ func TestFirewall_Drop3(t *testing.T) {
 		ConnectionState: &ConnectionState{
 			peerCert: &c1,
 		},
+		vpnIp: iputil.Ip2VpnIp(ipNet.IP),
 	}
 	h1.CreateRemoteCIDR(&c1)
 
@@ -424,6 +418,7 @@ func TestFirewall_Drop3(t *testing.T) {
 		ConnectionState: &ConnectionState{
 			peerCert: &c2,
 		},
+		vpnIp: iputil.Ip2VpnIp(ipNet.IP),
 	}
 	h2.CreateRemoteCIDR(&c2)
 
@@ -438,22 +433,90 @@ func TestFirewall_Drop3(t *testing.T) {
 		ConnectionState: &ConnectionState{
 			peerCert: &c3,
 		},
+		vpnIp: iputil.Ip2VpnIp(ipNet.IP),
 	}
 	h3.CreateRemoteCIDR(&c3)
 
-	fw := NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 1, 1, []string{}, "host1", nil, "", ""))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 1, 1, []string{}, "host1", nil, "", ""))
-	assert.Nil(t, fw.AddRule(true, fwProtoAny, 1, 1, []string{}, "", nil, "", "signer-sha"))
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 1, 1, []string{}, "", nil, "", "signer-sha"))
 	cp := cert.NewCAPool()
 
 	// c1 should pass because host match
-	assert.False(t, fw.Drop([]byte{}, p, true, &h1, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h1, cp, nil))
 	// c2 should pass because ca sha match
 	resetConntrack(fw)
-	assert.False(t, fw.Drop([]byte{}, p, true, &h2, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h2, cp, nil))
 	// c3 should fail because no match
 	resetConntrack(fw)
-	assert.True(t, fw.Drop([]byte{}, p, true, &h3, cp))
+	assert.Equal(t, fw.Drop([]byte{}, p, true, &h3, cp, nil), ErrNoMatchingRule)
+}
+
+func TestFirewall_DropConntrackReload(t *testing.T) {
+	l := test.NewLogger()
+	ob := &bytes.Buffer{}
+	l.SetOutput(ob)
+
+	p := firewall.Packet{
+		iputil.Ip2VpnIp(net.IPv4(1, 2, 3, 4)),
+		iputil.Ip2VpnIp(net.IPv4(1, 2, 3, 4)),
+		10,
+		90,
+		firewall.ProtoUDP,
+		false,
+	}
+
+	ipNet := net.IPNet{
+		IP:   net.IPv4(1, 2, 3, 4),
+		Mask: net.IPMask{255, 255, 255, 0},
+	}
+
+	c := cert.NebulaCertificate{
+		Details: cert.NebulaCertificateDetails{
+			Name:           "host1",
+			Ips:            []*net.IPNet{&ipNet},
+			Groups:         []string{"default-group"},
+			InvertedGroups: map[string]struct{}{"default-group": {}},
+			Issuer:         "signer-shasum",
+		},
+	}
+	h := HostInfo{
+		ConnectionState: &ConnectionState{
+			peerCert: &c,
+		},
+		vpnIp: iputil.Ip2VpnIp(ipNet.IP),
+	}
+	h.CreateRemoteCIDR(&c)
+
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"any"}, "", nil, "", ""))
+	cp := cert.NewCAPool()
+
+	// Drop outbound
+	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp, nil), ErrNoMatchingRule)
+	// Allow inbound
+	resetConntrack(fw)
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp, nil))
+	// Allow outbound because conntrack
+	assert.NoError(t, fw.Drop([]byte{}, p, false, &h, cp, nil))
+
+	oldFw := fw
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 10, 10, []string{"any"}, "", nil, "", ""))
+	fw.Conntrack = oldFw.Conntrack
+	fw.rulesVersion = oldFw.rulesVersion + 1
+
+	// Allow outbound because conntrack and new rules allow port 10
+	assert.NoError(t, fw.Drop([]byte{}, p, false, &h, cp, nil))
+
+	oldFw = fw
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
+	assert.Nil(t, fw.AddRule(true, firewall.ProtoAny, 11, 11, []string{"any"}, "", nil, "", ""))
+	fw.Conntrack = oldFw.Conntrack
+	fw.rulesVersion = oldFw.rulesVersion + 1
+
+	// Drop outbound because conntrack doesn't match new ruleset
+	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp, nil), ErrNoMatchingRule)
 }
 
 func BenchmarkLookup(b *testing.B) {
@@ -572,124 +635,126 @@ func Test_parsePort(t *testing.T) {
 }
 
 func TestNewFirewallFromConfig(t *testing.T) {
+	l := test.NewLogger()
 	// Test a bad rule definition
 	c := &cert.NebulaCertificate{}
-	conf := NewConfig()
+	conf := config.NewC(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": "asdf"}
-	_, err := NewFirewallFromConfig(c, conf)
+	_, err := NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound failed to parse, should be an array of rules")
 
 	// Test both port and code
-	conf = NewConfig()
+	conf = config.NewC(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"port": "1", "code": "2"}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; only one of port or code should be provided")
 
 	// Test missing host, group, cidr, ca_name and ca_sha
-	conf = NewConfig()
+	conf = config.NewC(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; at least one of host, group, cidr, ca_name, or ca_sha must be provided")
 
 	// Test code/port error
-	conf = NewConfig()
+	conf = config.NewC(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"code": "a", "host": "testh"}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; code was not a number; `a`")
 
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"port": "a", "host": "testh"}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; port was not a number; `a`")
 
 	// Test proto error
-	conf = NewConfig()
+	conf = config.NewC(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"code": "1", "host": "testh"}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; proto was not understood; ``")
 
 	// Test cidr parse error
-	conf = NewConfig()
+	conf = config.NewC(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"code": "1", "cidr": "testh", "proto": "any"}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; cidr did not parse; invalid CIDR address: testh")
 
 	// Test both group and groups
-	conf = NewConfig()
+	conf = config.NewC(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "group": "a", "groups": []string{"b", "c"}}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.inbound rule #0; only one of group or groups should be defined, both provided")
 }
 
 func TestAddFirewallRulesFromConfig(t *testing.T) {
+	l := test.NewLogger()
 	// Test adding tcp rule
-	conf := NewConfig()
+	conf := config.NewC(l)
 	mf := &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "tcp", "host": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(false, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, false, conf, mf))
-	assert.Equal(t, addRuleCall{incoming: false, proto: fwProtoTCP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
+	assert.Equal(t, addRuleCall{incoming: false, proto: firewall.ProtoTCP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
 
 	// Test adding udp rule
-	conf = NewConfig()
+	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "udp", "host": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(false, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, false, conf, mf))
-	assert.Equal(t, addRuleCall{incoming: false, proto: fwProtoUDP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
+	assert.Equal(t, addRuleCall{incoming: false, proto: firewall.ProtoUDP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
 
 	// Test adding icmp rule
-	conf = NewConfig()
+	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "icmp", "host": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(false, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, false, conf, mf))
-	assert.Equal(t, addRuleCall{incoming: false, proto: fwProtoICMP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
+	assert.Equal(t, addRuleCall{incoming: false, proto: firewall.ProtoICMP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
 
 	// Test adding any rule
-	conf = NewConfig()
+	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "host": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
-	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
+	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
 
 	// Test adding rule with ca_sha
-	conf = NewConfig()
+	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "ca_sha": "12312313123"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
-	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: nil, ip: nil, caSha: "12312313123"}, mf.lastCall)
+	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, ip: nil, caSha: "12312313123"}, mf.lastCall)
 
 	// Test adding rule with ca_name
-	conf = NewConfig()
+	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "ca_name": "root01"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
-	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: nil, ip: nil, caName: "root01"}, mf.lastCall)
+	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, ip: nil, caName: "root01"}, mf.lastCall)
 
 	// Test single group
-	conf = NewConfig()
+	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "group": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
-	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: []string{"a"}, ip: nil}, mf.lastCall)
+	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: []string{"a"}, ip: nil}, mf.lastCall)
 
 	// Test single groups
-	conf = NewConfig()
+	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "groups": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
-	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: []string{"a"}, ip: nil}, mf.lastCall)
+	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: []string{"a"}, ip: nil}, mf.lastCall)
 
 	// Test multiple AND groups
-	conf = NewConfig()
+	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "groups": []string{"a", "b"}}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
-	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: []string{"a", "b"}, ip: nil}, mf.lastCall)
+	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: []string{"a", "b"}, ip: nil}, mf.lastCall)
 
 	// Test Add error
-	conf = NewConfig()
+	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	mf.nextCallReturn = errors.New("test error")
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "host": "a"}}}
-	assert.EqualError(t, AddFirewallRulesFromConfig(true, conf, mf), "firewall.inbound rule #0; `test error`")
+	assert.EqualError(t, AddFirewallRulesFromConfig(l, true, conf, mf), "firewall.inbound rule #0; `test error`")
 }
 
 func TestTCPRTTTracking(t *testing.T) {
@@ -784,17 +849,16 @@ func TestTCPRTTTracking(t *testing.T) {
 }
 
 func TestFirewall_convertRule(t *testing.T) {
+	l := test.NewLogger()
 	ob := &bytes.Buffer{}
-	out := l.Out
 	l.SetOutput(ob)
-	defer l.SetOutput(out)
 
 	// Ensure group array of 1 is converted and a warning is printed
 	c := map[interface{}]interface{}{
 		"group": []interface{}{"group1"},
 	}
 
-	r, err := convertRule(c, "test", 1)
+	r, err := convertRule(l, c, "test", 1)
 	assert.Contains(t, ob.String(), "test rule #1; group was an array with a single value, converting to simple value")
 	assert.Nil(t, err)
 	assert.Equal(t, "group1", r.Group)
@@ -805,7 +869,7 @@ func TestFirewall_convertRule(t *testing.T) {
 		"group": []interface{}{"group1", "group2"},
 	}
 
-	r, err = convertRule(c, "test", 1)
+	r, err = convertRule(l, c, "test", 1)
 	assert.Equal(t, "", ob.String())
 	assert.Error(t, err, "group should contain a single value, an array with more than one entry was provided")
 
@@ -815,7 +879,7 @@ func TestFirewall_convertRule(t *testing.T) {
 		"group": "group1",
 	}
 
-	r, err = convertRule(c, "test", 1)
+	r, err = convertRule(l, c, "test", 1)
 	assert.Nil(t, err)
 	assert.Equal(t, "group1", r.Group)
 }
@@ -856,7 +920,7 @@ func (mf *mockFirewall) AddRule(incoming bool, proto uint8, startPort int32, end
 }
 
 func resetConntrack(fw *Firewall) {
-	fw.connMutex.Lock()
+	fw.Conntrack.Lock()
-	fw.Conns = map[FirewallPacket]*conn{}
+	fw.Conntrack.Conns = map[firewall.Packet]*conn{}
-	fw.connMutex.Unlock()
+	fw.Conntrack.Unlock()
 }

go.mod

@@ -1,33 +1,48 @@
 module github.com/slackhq/nebula
 
-go 1.12
+go 1.18
 
 require (
-	github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239
+	github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be
 	github.com/armon/go-radix v1.0.0
-	github.com/cespare/xxhash/v2 v2.1.1 // indirect
 	github.com/cyberdelia/go-metrics-graphite v0.0.0-20161219230853-39f87cc3b432
-	github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568 // indirect
+	github.com/flynn/noise v1.0.0
-	github.com/flynn/noise v0.0.0-20180327030543-2492fe189ae6
+	github.com/gogo/protobuf v1.3.2
-	github.com/golang/protobuf v1.3.2
+	github.com/google/gopacket v1.1.19
 	github.com/imdario/mergo v0.3.8
-	github.com/kardianos/service v1.0.0
+	github.com/kardianos/service v1.2.1
-	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
+	github.com/miekg/dns v1.1.48
-	github.com/kr/pretty v0.1.0 // indirect
+	github.com/nbrownus/go-metrics-prometheus v0.0.0-20210712211119-974a6260965f
-	github.com/miekg/dns v1.1.25
+	github.com/prometheus/client_golang v1.12.1
-	github.com/nbrownus/go-metrics-prometheus v0.0.0-20180622211546-6e6d5173d99c
+	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475
-	github.com/prometheus/client_golang v1.2.1
+	github.com/sirupsen/logrus v1.8.1
-	github.com/prometheus/client_model v0.0.0-20191202183732-d1d2010b5bee // indirect
+	github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
-	github.com/prometheus/procfs v0.0.8 // indirect
+	github.com/songgao/water v0.0.0-20200317203138-2b4b6d7c09d8
-	github.com/rcrowley/go-metrics v0.0.0-20190826022208-cac0b30c2563
+	github.com/stretchr/testify v1.7.1
-	github.com/sirupsen/logrus v1.4.2
+	github.com/vishvananda/netlink v1.1.0
-	github.com/songgao/water v0.0.0-20190725173103-fd331bda3f4b
+	golang.org/x/crypto v0.0.0-20220331220935-ae2d96664a29
-	github.com/stretchr/testify v1.4.0
+	golang.org/x/net v0.0.0-20220403103023-749bd193bc2b
-	github.com/vishvananda/netlink v1.0.1-0.20190522153524-00009fb8606a
+	golang.org/x/sys v0.0.0-20220406155245-289d7a0edf71
-	github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df // indirect
+	golang.zx2c4.com/wintun v0.0.0-20211104114900-415007cec224
-	golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413
+	golang.zx2c4.com/wireguard/windows v0.5.3
-	golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553
+	google.golang.org/protobuf v1.28.0
-	golang.org/x/sys v0.0.0-20191210023423-ac6580df4449
+	gopkg.in/yaml.v2 v2.4.0
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
+)
-	gopkg.in/yaml.v2 v2.2.7
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/common v0.33.0 // indirect
+	github.com/prometheus/procfs v0.7.3 // indirect
+	github.com/vishvananda/netns v0.0.0-20211101163701-50045581ed74 // indirect
+	golang.org/x/mod v0.6.0-dev.0.20220106191415-9b9b3d81d5e3 // indirect
+	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
+	golang.org/x/tools v0.1.10 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )

go.sum

@@ -1,154 +1,574 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
+cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
+cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
+cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
+cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
+cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
+cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
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+cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
+cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 h1:kFOfPq6dUM1hTo4JG6LR5AXSUEsOjtdm0kw0FtQtMJA=
+github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
-github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
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+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
 github.com/armon/go-radix v1.0.0 h1:F4z6KzEeeQIMeLFa97iZU6vupzoecKdU5TX24SNppXI=
 github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
-github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/cespare/xxhash/v2 v2.1.0 h1:yTUvW7Vhb89inJ+8irsUqiWjh8iT6sQPZiQzI6ReGkA=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash/v2 v2.1.0/go.mod h1:dgIUBU3pDso/gPgZ1osOZ0iQf77oPR28Tjxl5dIMyVM=
-github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cbYE=
+github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cyberdelia/go-metrics-graphite v0.0.0-20161219230853-39f87cc3b432 h1:M5QgkYacWj0Xs8MhpIK/5uwU02icXpEoSo9sM2aRCps=
 github.com/cyberdelia/go-metrics-graphite v0.0.0-20161219230853-39f87cc3b432/go.mod h1:xwIwAxMvYnVrGJPe2FKx5prTrnAjGOD8zvDOnxnrrkM=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568 h1:BHsljHzVlRcyQhjrss6TZTdY2VfCqZPbv5k3iBFa2ZQ=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
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handshake.go

@@ -1,31 +1,31 @@
 package nebula
 
-const (
+import (
-	handshakeIXPSK0 = 0
+	"github.com/slackhq/nebula/header"
-	handshakeXXPSK0 = 1
+	"github.com/slackhq/nebula/udp"
 )
 
-func HandleIncomingHandshake(f *Interface, addr *udpAddr, packet []byte, h *Header, hostinfo *HostInfo) {
+func HandleIncomingHandshake(f *Interface, addr *udp.Addr, via interface{}, packet []byte, h *header.H, hostinfo *HostInfo) {
-	newHostinfo, _ := f.handshakeManager.QueryIndex(h.RemoteIndex)
+	// First remote allow list check before we know the vpnIp
-	//TODO: For stage 1 we won't have hostinfo yet but stage 2 and above would require it, this check may be helpful in those cases
+	if addr != nil {
-	//if err != nil {
+		if !f.lightHouse.GetRemoteAllowList().AllowUnknownVpnIp(addr.IP) {
-	//	l.WithError(err).WithField("udpAddr", addr).Error("Error while finding host info for handshake message")
+			f.l.WithField("udpAddr", addr).Debug("lighthouse.remote_allow_list denied incoming handshake")
-	//	return
+			return
-	//}
+		}
+	}
 
-	tearDown := false
 	switch h.Subtype {
-	case handshakeIXPSK0:
+	case header.HandshakeIXPSK0:
 		switch h.MessageCounter {
 		case 1:
-			tearDown = ixHandshakeStage1(f, addr, newHostinfo, packet, h)
+			ixHandshakeStage1(f, addr, via, packet, h)
 		case 2:
-			tearDown = ixHandshakeStage2(f, addr, newHostinfo, packet, h)
+			newHostinfo, _ := f.handshakeManager.QueryIndex(h.RemoteIndex)
+			tearDown := ixHandshakeStage2(f, addr, via, newHostinfo, packet, h)
+			if tearDown && newHostinfo != nil {
+				f.handshakeManager.DeleteHostInfo(newHostinfo)
+			}
 		}
 	}
 
-	if tearDown && newHostinfo != nil {
-		f.handshakeManager.DeleteIndex(newHostinfo.localIndexId)
-		f.handshakeManager.DeleteVpnIP(newHostinfo.hostId)
-	}
 }

handshake_ix.go

@@ -4,40 +4,36 @@ import (
 	"sync/atomic"
 	"time"
 
-	"bytes"
-
 	"github.com/flynn/noise"
-	"github.com/golang/protobuf/proto"
+	"github.com/slackhq/nebula/header"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/udp"
 )
 
 // NOISE IX Handshakes
 
 // This function constructs a handshake packet, but does not actually send it
 // Sending is done by the handshake manager
-func ixHandshakeStage0(f *Interface, vpnIp uint32, hostinfo *HostInfo) {
+func ixHandshakeStage0(f *Interface, vpnIp iputil.VpnIp, hostinfo *HostInfo) {
 	// This queries the lighthouse if we don't know a remote for the host
+	// We do it here to provoke the lighthouse to preempt our timer wheel and trigger the stage 1 packet to send
+	// more quickly, effect is a quicker handshake.
 	if hostinfo.remote == nil {
-		ips, err := f.lightHouse.Query(vpnIp, f)
+		f.lightHouse.QueryServer(vpnIp, f)
-		if err != nil {
-			//l.Debugln(err)
-		}
-		for _, ip := range ips {
-			hostinfo.AddRemote(ip)
-		}
 	}
 
-	myIndex, err := generateIndex()
+	err := f.handshakeManager.AddIndexHostInfo(hostinfo)
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).
+		f.l.WithError(err).WithField("vpnIp", vpnIp).
 			WithField("handshake", m{"stage": 0, "style": "ix_psk0"}).Error("Failed to generate index")
 		return
 	}
+
 	ci := hostinfo.ConnectionState
-	f.handshakeManager.AddIndexHostInfo(myIndex, hostinfo)
 
 	hsProto := &NebulaHandshakeDetails{
-		InitiatorIndex: myIndex,
+		InitiatorIndex: hostinfo.localIndexId,
-		Time:           uint64(time.Now().Unix()),
+		Time:           uint64(time.Now().UnixNano()),
 		Cert:           ci.certState.rawCertificateNoKey,
 	}
 
@@ -46,219 +42,350 @@ func ixHandshakeStage0(f *Interface, vpnIp uint32, hostinfo *HostInfo) {
 	hs := &NebulaHandshake{
 		Details: hsProto,
 	}
-	hsBytes, err = proto.Marshal(hs)
+	hsBytes, err = hs.Marshal()
 
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).
+		f.l.WithError(err).WithField("vpnIp", vpnIp).
 			WithField("handshake", m{"stage": 0, "style": "ix_psk0"}).Error("Failed to marshal handshake message")
 		return
 	}
 
-	header := HeaderEncode(make([]byte, HeaderLen), Version, uint8(handshake), handshakeIXPSK0, 0, 1)
+	h := header.Encode(make([]byte, header.Len), header.Version, header.Handshake, header.HandshakeIXPSK0, 0, 1)
-	atomic.AddUint64(ci.messageCounter, 1)
+	atomic.AddUint64(&ci.atomicMessageCounter, 1)
 
-	msg, _, _, err := ci.H.WriteMessage(header, hsBytes)
+	msg, _, _, err := ci.H.WriteMessage(h, hsBytes)
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).
+		f.l.WithError(err).WithField("vpnIp", vpnIp).
 			WithField("handshake", m{"stage": 0, "style": "ix_psk0"}).Error("Failed to call noise.WriteMessage")
 		return
 	}
 
+	// We are sending handshake packet 1, so we don't expect to receive
+	// handshake packet 1 from the responder
+	ci.window.Update(f.l, 1)
+
 	hostinfo.HandshakePacket[0] = msg
 	hostinfo.HandshakeReady = true
 	hostinfo.handshakeStart = time.Now()
-
 }
 
-func ixHandshakeStage1(f *Interface, addr *udpAddr, hostinfo *HostInfo, packet []byte, h *Header) bool {
+func ixHandshakeStage1(f *Interface, addr *udp.Addr, via interface{}, packet []byte, h *header.H) {
-	var ip uint32
+	ci := f.newConnectionState(f.l, false, noise.HandshakeIX, []byte{}, 0)
-	if h.RemoteIndex == 0 {
-		ci := f.newConnectionState(false, noise.HandshakeIX, []byte{}, 0)
 	// Mark packet 1 as seen so it doesn't show up as missed
-		ci.window.Update(1)
+	ci.window.Update(f.l, 1)
 
-		msg, _, _, err := ci.H.ReadMessage(nil, packet[HeaderLen:])
+	msg, _, _, err := ci.H.ReadMessage(nil, packet[header.Len:])
 	if err != nil {
-			l.WithError(err).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to call noise.ReadMessage")
-			return true
+		return
 	}
 
 	hs := &NebulaHandshake{}
-		err = proto.Unmarshal(msg, hs)
+	err = hs.Unmarshal(msg)
 	/*
 		l.Debugln("GOT INDEX: ", hs.Details.InitiatorIndex)
 	*/
 	if err != nil || hs.Details == nil {
-			l.WithError(err).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed unmarshal handshake message")
-			return true
+		return
 	}
 
-		hostinfo, _ := f.handshakeManager.pendingHostMap.QueryReverseIndex(hs.Details.InitiatorIndex)
+	remoteCert, err := RecombineCertAndValidate(ci.H, hs.Details.Cert, f.caPool)
-		if hostinfo != nil && bytes.Equal(hostinfo.HandshakePacket[0], packet[HeaderLen:]) {
-			if msg, ok := hostinfo.HandshakePacket[2]; ok {
-				err := f.outside.WriteTo(msg, addr)
 	if err != nil {
-					l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("udpAddr", addr).
-						WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("cached", true).
-						WithError(err).Error("Failed to send handshake message")
-				} else {
-					l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
-						WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("cached", true).
-						Info("Handshake message sent")
-				}
-				return false
-			}
-
-			l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).WithField("cached", true).
-				WithField("packets", hostinfo.HandshakePacket).
-				Error("Seen this handshake packet already but don't have a cached packet to return")
-		}
-
-		remoteCert, err := RecombineCertAndValidate(ci.H, hs.Details.Cert)
-		if err != nil {
-			l.WithError(err).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).WithField("cert", remoteCert).
 			Info("Invalid certificate from host")
-			return true
+		return
 	}
-		vpnIP := ip2int(remoteCert.Details.Ips[0].IP)
+	vpnIp := iputil.Ip2VpnIp(remoteCert.Details.Ips[0].IP)
+	certName := remoteCert.Details.Name
+	fingerprint, _ := remoteCert.Sha256Sum()
+	issuer := remoteCert.Details.Issuer
 
-		myIndex, err := generateIndex()
+	if vpnIp == f.myVpnIp {
+		f.l.WithField("vpnIp", vpnIp).WithField("udpAddr", addr).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("issuer", issuer).
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Refusing to handshake with myself")
+		return
+	}
+
+	if addr != nil {
+		if !f.lightHouse.GetRemoteAllowList().Allow(vpnIp, addr.IP) {
+			f.l.WithField("vpnIp", vpnIp).WithField("udpAddr", addr).Debug("lighthouse.remote_allow_list denied incoming handshake")
+			return
+		}
+	}
+
+	myIndex, err := generateIndex(f.l)
 	if err != nil {
-			l.WithError(err).WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("vpnIp", vpnIp).WithField("udpAddr", addr).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("issuer", issuer).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to generate index")
-			return true
+		return
 	}
 
-		hostinfo, err = f.handshakeManager.AddIndex(myIndex, ci)
+	hostinfo := &HostInfo{
-		if err != nil {
+		ConnectionState:   ci,
-			l.WithError(err).WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+		localIndexId:      myIndex,
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Error adding index to connection manager")
+		remoteIndexId:     hs.Details.InitiatorIndex,
-
+		vpnIp:             vpnIp,
-			return true
+		HandshakePacket:   make(map[uint8][]byte, 0),
+		lastHandshakeTime: hs.Details.Time,
+		relayState: RelayState{
+			relays:        map[iputil.VpnIp]struct{}{},
+			relayForByIp:  map[iputil.VpnIp]*Relay{},
+			relayForByIdx: map[uint32]*Relay{},
+		},
 	}
-		l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+
+	hostinfo.Lock()
+	defer hostinfo.Unlock()
+
+	f.l.WithField("vpnIp", vpnIp).WithField("udpAddr", addr).
+		WithField("certName", certName).
+		WithField("fingerprint", fingerprint).
+		WithField("issuer", issuer).
 		WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
 		WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
 		Info("Handshake message received")
 
-		hostinfo.remoteIndexId = hs.Details.InitiatorIndex
 	hs.Details.ResponderIndex = myIndex
 	hs.Details.Cert = ci.certState.rawCertificateNoKey
+	// Update the time in case their clock is way off from ours
+	hs.Details.Time = uint64(time.Now().UnixNano())
 
-		hsBytes, err := proto.Marshal(hs)
+	hsBytes, err := hs.Marshal()
 	if err != nil {
-			l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("vpnIp", hostinfo.vpnIp).WithField("udpAddr", addr).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("issuer", issuer).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to marshal handshake message")
-			return true
+		return
 	}
 
-		header := HeaderEncode(make([]byte, HeaderLen), Version, uint8(handshake), handshakeIXPSK0, hs.Details.InitiatorIndex, 2)
+	nh := header.Encode(make([]byte, header.Len), header.Version, header.Handshake, header.HandshakeIXPSK0, hs.Details.InitiatorIndex, 2)
-		msg, dKey, eKey, err := ci.H.WriteMessage(header, hsBytes)
+	msg, dKey, eKey, err := ci.H.WriteMessage(nh, hsBytes)
 	if err != nil {
-			l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("vpnIp", hostinfo.vpnIp).WithField("udpAddr", addr).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("issuer", issuer).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to call noise.WriteMessage")
-			return true
+		return
+	} else if dKey == nil || eKey == nil {
+		f.l.WithField("vpnIp", hostinfo.vpnIp).WithField("udpAddr", addr).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("issuer", issuer).
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Noise did not arrive at a key")
+		return
 	}
 
-		if f.hostMap.CheckHandshakeCompleteIP(vpnIP) && vpnIP < ip2int(f.certState.certificate.Details.Ips[0].IP) {
+	hostinfo.HandshakePacket[0] = make([]byte, len(packet[header.Len:]))
-			l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+	copy(hostinfo.HandshakePacket[0], packet[header.Len:])
-				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
-				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
-				Info("Prevented a handshake race")
-
-			// Send a test packet to trigger an authenticated tunnel test, this should suss out any lingering tunnel issues
-			f.SendMessageToVpnIp(test, testRequest, vpnIP, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
-			return true
-		}
-
-		hostinfo.HandshakePacket[0] = make([]byte, len(packet[HeaderLen:]))
-		copy(hostinfo.HandshakePacket[0], packet[HeaderLen:])
 
 	// Regardless of whether you are the sender or receiver, you should arrive here
 	// and complete standing up the connection.
-		if dKey != nil && eKey != nil {
 	hostinfo.HandshakePacket[2] = make([]byte, len(msg))
 	copy(hostinfo.HandshakePacket[2], msg)
 
+	// We are sending handshake packet 2, so we don't expect to receive
+	// handshake packet 2 from the initiator.
+	ci.window.Update(f.l, 2)
+
+	ci.peerCert = remoteCert
+	ci.dKey = NewNebulaCipherState(dKey)
+	ci.eKey = NewNebulaCipherState(eKey)
+
+	hostinfo.remotes = f.lightHouse.QueryCache(vpnIp)
+	hostinfo.SetRemote(addr)
+	hostinfo.CreateRemoteCIDR(remoteCert)
+
+	// Only overwrite existing record if we should win the handshake race
+	overwrite := vpnIp > f.myVpnIp
+	existing, err := f.handshakeManager.CheckAndComplete(hostinfo, 0, overwrite, f)
+	if err != nil {
+		switch err {
+		case ErrAlreadySeen:
+			// Update remote if preferred (Note we have to switch to locking
+			// the existing hostinfo, and then switch back so the defer Unlock
+			// higher in this function still works)
+			hostinfo.Unlock()
+			existing.Lock()
+			// Update remote if preferred
+			if existing.SetRemoteIfPreferred(f.hostMap, addr) {
+				// Send a test packet to ensure the other side has also switched to
+				// the preferred remote
+				f.SendMessageToVpnIp(header.Test, header.TestRequest, vpnIp, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
+			}
+			existing.Unlock()
+			hostinfo.Lock()
+
+			msg = existing.HandshakePacket[2]
+			f.messageMetrics.Tx(header.Handshake, header.MessageSubType(msg[1]), 1)
+			if addr != nil {
 				err := f.outside.WriteTo(msg, addr)
 				if err != nil {
-				l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+					f.l.WithField("vpnIp", existing.vpnIp).WithField("udpAddr", addr).
+						WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("cached", true).
+						WithError(err).Error("Failed to send handshake message")
+				} else {
+					f.l.WithField("vpnIp", existing.vpnIp).WithField("udpAddr", addr).
+						WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("cached", true).
+						Info("Handshake message sent")
+				}
+				return
+			} else {
+				via2 := via.(*ViaSender)
+				if via2 == nil {
+					f.l.Error("Handshake send failed: both addr and via are nil.")
+					return
+				}
+				hostinfo.relayState.InsertRelayTo(via2.relayHI.vpnIp)
+				f.SendVia(via2.relayHI, via2.relay, msg, make([]byte, 12), make([]byte, mtu), false)
+				f.l.WithField("vpnIp", existing.vpnIp).WithField("relay", via2.relayHI.vpnIp).
+					WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("cached", true).
+					Info("Handshake message sent")
+				return
+			}
+		case ErrExistingHostInfo:
+			// This means there was an existing tunnel and this handshake was older than the one we are currently based on
+			f.l.WithField("vpnIp", vpnIp).WithField("udpAddr", addr).
+				WithField("certName", certName).
+				WithField("oldHandshakeTime", existing.lastHandshakeTime).
+				WithField("newHandshakeTime", hostinfo.lastHandshakeTime).
+				WithField("fingerprint", fingerprint).
+				WithField("issuer", issuer).
+				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+				Info("Handshake too old")
+
+			// Send a test packet to trigger an authenticated tunnel test, this should suss out any lingering tunnel issues
+			f.SendMessageToVpnIp(header.Test, header.TestRequest, vpnIp, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
+			return
+		case ErrLocalIndexCollision:
+			// This means we failed to insert because of collision on localIndexId. Just let the next handshake packet retry
+			f.l.WithField("vpnIp", vpnIp).WithField("udpAddr", addr).
+				WithField("certName", certName).
+				WithField("fingerprint", fingerprint).
+				WithField("issuer", issuer).
+				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+				WithField("localIndex", hostinfo.localIndexId).WithField("collision", existing.vpnIp).
+				Error("Failed to add HostInfo due to localIndex collision")
+			return
+		case ErrExistingHandshake:
+			// We have a race where both parties think they are an initiator and this tunnel lost, let the other one finish
+			f.l.WithField("vpnIp", vpnIp).WithField("udpAddr", addr).
+				WithField("certName", certName).
+				WithField("fingerprint", fingerprint).
+				WithField("issuer", issuer).
+				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+				Error("Prevented a pending handshake race")
+			return
+		default:
+			// Shouldn't happen, but just in case someone adds a new error type to CheckAndComplete
+			// And we forget to update it here
+			f.l.WithError(err).WithField("vpnIp", vpnIp).WithField("udpAddr", addr).
+				WithField("certName", certName).
+				WithField("fingerprint", fingerprint).
+				WithField("issuer", issuer).
+				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+				Error("Failed to add HostInfo to HostMap")
+			return
+		}
+	}
+
+	// Do the send
+	f.messageMetrics.Tx(header.Handshake, header.MessageSubType(msg[1]), 1)
+	if addr != nil {
+		err = f.outside.WriteTo(msg, addr)
+		if err != nil {
+			f.l.WithField("vpnIp", vpnIp).WithField("udpAddr", addr).
+				WithField("certName", certName).
+				WithField("fingerprint", fingerprint).
+				WithField("issuer", issuer).
 				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
 				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
 				WithError(err).Error("Failed to send handshake")
 		} else {
-				l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+			f.l.WithField("vpnIp", vpnIp).WithField("udpAddr", addr).
+				WithField("certName", certName).
+				WithField("fingerprint", fingerprint).
+				WithField("issuer", issuer).
 				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
 				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
+				WithField("sentCachedPackets", len(hostinfo.packetStore)).
+				Info("Handshake message sent")
+		}
+	} else {
+		via2 := via.(*ViaSender)
+		if via2 == nil {
+			f.l.Error("Handshake send failed: both addr and via are nil.")
+			return
+		}
+		hostinfo.relayState.InsertRelayTo(via2.relayHI.vpnIp)
+		f.SendVia(via2.relayHI, via2.relay, msg, make([]byte, 12), make([]byte, mtu), false)
+		f.l.WithField("vpnIp", vpnIp).WithField("relay", via2.relayHI.vpnIp).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("issuer", issuer).
+			WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+			WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
+			WithField("sentCachedPackets", len(hostinfo.packetStore)).
 			Info("Handshake message sent")
 	}
 
-			ip = ip2int(remoteCert.Details.Ips[0].IP)
+	hostinfo.handshakeComplete(f.l, f.cachedPacketMetrics)
-			ci.peerCert = remoteCert
-			ci.dKey = NewNebulaCipherState(dKey)
-			ci.eKey = NewNebulaCipherState(eKey)
-			//l.Debugln("got symmetric pairs")
 
-			//hostinfo.ClearRemotes()
+	return
-			hostinfo.AddRemote(*addr)
-			hostinfo.CreateRemoteCIDR(remoteCert)
-			f.lightHouse.AddRemoteAndReset(ip, addr)
-			if f.serveDns {
-				dnsR.Add(remoteCert.Details.Name+".", remoteCert.Details.Ips[0].IP.String())
-			}
-
-			ho, err := f.hostMap.QueryVpnIP(vpnIP)
-			if err == nil && ho.localIndexId != 0 {
-				l.WithField("vpnIp", vpnIP).
-					WithField("action", "removing stale index").
-					WithField("index", ho.localIndexId).
-					Debug("Handshake processing")
-				f.hostMap.DeleteIndex(ho.localIndexId)
-			}
-
-			f.hostMap.AddIndexHostInfo(hostinfo.localIndexId, hostinfo)
-			f.hostMap.AddVpnIPHostInfo(vpnIP, hostinfo)
-
-			hostinfo.handshakeComplete()
-		} else {
-			l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
-				Error("Noise did not arrive at a key")
-			return true
-		}
-
-	}
-
-	f.hostMap.AddRemote(ip, addr)
-	return false
 }
 
-func ixHandshakeStage2(f *Interface, addr *udpAddr, hostinfo *HostInfo, packet []byte, h *Header) bool {
+func ixHandshakeStage2(f *Interface, addr *udp.Addr, via interface{}, hostinfo *HostInfo, packet []byte, h *header.H) bool {
 	if hostinfo == nil {
+		// Nothing here to tear down, got a bogus stage 2 packet
 		return true
 	}
 
-	if bytes.Equal(hostinfo.HandshakePacket[2], packet[HeaderLen:]) {
+	hostinfo.Lock()
-		l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+	defer hostinfo.Unlock()
-			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("header", h).
+
-			Error("Already seen this handshake packet")
+	if addr != nil {
+		if !f.lightHouse.GetRemoteAllowList().Allow(hostinfo.vpnIp, addr.IP) {
+			f.l.WithField("vpnIp", hostinfo.vpnIp).WithField("udpAddr", addr).Debug("lighthouse.remote_allow_list denied incoming handshake")
 			return false
 		}
+	}
 
 	ci := hostinfo.ConnectionState
-	// Mark packet 2 as seen so it doesn't show up as missed
+	if ci.ready {
-	ci.window.Update(2)
+		f.l.WithField("vpnIp", hostinfo.vpnIp).WithField("udpAddr", addr).
+			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("header", h).
+			Info("Handshake is already complete")
 
-	hostinfo.HandshakePacket[2] = make([]byte, len(packet[HeaderLen:]))
+		// Update remote if preferred
-	copy(hostinfo.HandshakePacket[2], packet[HeaderLen:])
+		if hostinfo.SetRemoteIfPreferred(f.hostMap, addr) {
+			// Send a test packet to ensure the other side has also switched to
+			// the preferred remote
+			f.SendMessageToVpnIp(header.Test, header.TestRequest, hostinfo.vpnIp, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
+		}
 
-	msg, eKey, dKey, err := ci.H.ReadMessage(nil, packet[HeaderLen:])
+		// We already have a complete tunnel, there is nothing that can be done by processing further stage 1 packets
+		return false
+	}
+
+	msg, eKey, dKey, err := ci.H.ReadMessage(nil, packet[header.Len:])
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("vpnIp", hostinfo.vpnIp).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("header", h).
 			Error("Failed to call noise.ReadMessage")
 
@@ -266,81 +393,119 @@ func ixHandshakeStage2(f *Interface, addr *udpAddr, hostinfo *HostInfo, packet [
 		// to DOS us. Every other error condition after should to allow a possible good handshake to complete in the
 		// near future
 		return false
+	} else if dKey == nil || eKey == nil {
+		f.l.WithField("vpnIp", hostinfo.vpnIp).WithField("udpAddr", addr).
+			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
+			Error("Noise did not arrive at a key")
+
+		// This should be impossible in IX but just in case, if we get here then there is no chance to recover
+		// the handshake state machine. Tear it down
+		return true
 	}
 
 	hs := &NebulaHandshake{}
-	err = proto.Unmarshal(msg, hs)
+	err = hs.Unmarshal(msg)
 	if err != nil || hs.Details == nil {
-		l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("vpnIp", hostinfo.vpnIp).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).Error("Failed unmarshal handshake message")
+
+		// The handshake state machine is complete, if things break now there is no chance to recover. Tear down and start again
 		return true
 	}
 
-	remoteCert, err := RecombineCertAndValidate(ci.H, hs.Details.Cert)
+	remoteCert, err := RecombineCertAndValidate(ci.H, hs.Details.Cert, f.caPool)
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("vpnIp", hostinfo.vpnIp).WithField("udpAddr", addr).
 			WithField("cert", remoteCert).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
 			Error("Invalid certificate from host")
+
+		// The handshake state machine is complete, if things break now there is no chance to recover. Tear down and start again
 		return true
 	}
-	vpnIP := ip2int(remoteCert.Details.Ips[0].IP)
+
+	vpnIp := iputil.Ip2VpnIp(remoteCert.Details.Ips[0].IP)
+	certName := remoteCert.Details.Name
+	fingerprint, _ := remoteCert.Sha256Sum()
+	issuer := remoteCert.Details.Issuer
+
+	// Ensure the right host responded
+	if vpnIp != hostinfo.vpnIp {
+		f.l.WithField("intendedVpnIp", hostinfo.vpnIp).WithField("haveVpnIp", vpnIp).
+			WithField("udpAddr", addr).WithField("certName", certName).
+			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
+			Info("Incorrect host responded to handshake")
+
+		// Release our old handshake from pending, it should not continue
+		f.handshakeManager.pendingHostMap.DeleteHostInfo(hostinfo)
+
+		// Create a new hostinfo/handshake for the intended vpn ip
+		//TODO: this adds it to the timer wheel in a way that aggressively retries
+		newHostInfo := f.getOrHandshake(hostinfo.vpnIp)
+		newHostInfo.Lock()
+
+		// Block the current used address
+		newHostInfo.remotes = hostinfo.remotes
+		newHostInfo.remotes.BlockRemote(addr)
+
+		// Get the correct remote list for the host we did handshake with
+		hostinfo.remotes = f.lightHouse.QueryCache(vpnIp)
+
+		f.l.WithField("blockedUdpAddrs", newHostInfo.remotes.CopyBlockedRemotes()).WithField("vpnIp", vpnIp).
+			WithField("remotes", newHostInfo.remotes.CopyAddrs(f.hostMap.preferredRanges)).
+			Info("Blocked addresses for handshakes")
+
+		// Swap the packet store to benefit the original intended recipient
+		hostinfo.ConnectionState.queueLock.Lock()
+		newHostInfo.packetStore = hostinfo.packetStore
+		hostinfo.packetStore = []*cachedPacket{}
+		hostinfo.ConnectionState.queueLock.Unlock()
+
+		// Finally, put the correct vpn ip in the host info, tell them to close the tunnel, and return true to tear down
+		hostinfo.vpnIp = vpnIp
+		f.sendCloseTunnel(hostinfo)
+		newHostInfo.Unlock()
+
+		return true
+	}
+
+	// Mark packet 2 as seen so it doesn't show up as missed
+	ci.window.Update(f.l, 2)
 
 	duration := time.Since(hostinfo.handshakeStart).Nanoseconds()
-	l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+	f.l.WithField("vpnIp", vpnIp).WithField("udpAddr", addr).
+		WithField("certName", certName).
+		WithField("fingerprint", fingerprint).
+		WithField("issuer", issuer).
 		WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
 		WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
 		WithField("durationNs", duration).
+		WithField("sentCachedPackets", len(hostinfo.packetStore)).
 		Info("Handshake message received")
 
-	//ci.remoteIndex = hs.ResponderIndex
 	hostinfo.remoteIndexId = hs.Details.ResponderIndex
-	hs.Details.Cert = ci.certState.rawCertificateNoKey
+	hostinfo.lastHandshakeTime = hs.Details.Time
 
-	/*
+	// Store their cert and our symmetric keys
-		hsBytes, err := proto.Marshal(hs)
-		if err != nil {
-			l.Debugln("Failed to marshal handshake: ", err)
-			return
-		}
-	*/
-
-	// Regardless of whether you are the sender or receiver, you should arrive here
-	// and complete standing up the connection.
-	if dKey != nil && eKey != nil {
-		ip := ip2int(remoteCert.Details.Ips[0].IP)
 	ci.peerCert = remoteCert
 	ci.dKey = NewNebulaCipherState(dKey)
 	ci.eKey = NewNebulaCipherState(eKey)
-		//l.Debugln("got symmetric pairs")
 
-		//hostinfo.ClearRemotes()
+	// Make sure the current udpAddr being used is set for responding
-		f.hostMap.AddRemote(ip, addr)
+	if addr != nil {
-		hostinfo.CreateRemoteCIDR(remoteCert)
+		hostinfo.SetRemote(addr)
-		f.lightHouse.AddRemoteAndReset(ip, addr)
-		if f.serveDns {
-			dnsR.Add(remoteCert.Details.Name+".", remoteCert.Details.Ips[0].IP.String())
-		}
-
-		ho, err := f.hostMap.QueryVpnIP(vpnIP)
-		if err == nil && ho.localIndexId != 0 {
-			l.WithField("vpnIp", vpnIP).
-				WithField("action", "removing stale index").
-				WithField("index", ho.localIndexId).
-				Debug("Handshake processing")
-			f.hostMap.DeleteIndex(ho.localIndexId)
-		}
-
-		f.hostMap.AddVpnIPHostInfo(vpnIP, hostinfo)
-		f.hostMap.AddIndexHostInfo(hostinfo.localIndexId, hostinfo)
-
-		hostinfo.handshakeComplete()
-		f.metricHandshakes.Update(duration)
 	} else {
-		l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+		via2 := via.(*ViaSender)
-			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
+		hostinfo.relayState.InsertRelayTo(via2.relayHI.vpnIp)
-			Error("Noise did not arrive at a key")
-		return true
 	}
 
+	// Build up the radix for the firewall if we have subnets in the cert
+	hostinfo.CreateRemoteCIDR(remoteCert)
+
+	// Complete our handshake and update metrics, this will replace any existing tunnels for this vpnIp
+	//TODO: Complete here does not do a race avoidance, it will just take the new tunnel. Is this ok?
+	f.handshakeManager.Complete(hostinfo, f)
+	hostinfo.handshakeComplete(f.l, f.cachedPacketMetrics)
+	f.metricHandshakes.Update(duration)
+
 	return false
 }

handshake_manager.go

@@ -1,175 +1,441 @@
 package nebula
 
 import (
+	"bytes"
+	"context"
 	"crypto/rand"
 	"encoding/binary"
-	"fmt"
+	"errors"
 	"net"
 	"time"
 
+	"github.com/rcrowley/go-metrics"
 	"github.com/sirupsen/logrus"
+	"github.com/slackhq/nebula/header"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/udp"
 )
 
 const (
-	// Total time to try a handshake = sequence of HandshakeTryInterval * HandshakeRetries
+	DefaultHandshakeTryInterval   = time.Millisecond * 100
-	// With 100ms interval and 20 retries is 23.5 seconds
+	DefaultHandshakeRetries       = 10
-	HandshakeTryInterval = time.Millisecond * 100
+	DefaultHandshakeTriggerBuffer = 64
-	HandshakeRetries     = 20
+	DefaultUseRelays              = true
-	// HandshakeWaitRotation is the number of handshake attempts to do before starting to use other ips addresses
-	HandshakeWaitRotation = 5
 )
 
+var (
+	defaultHandshakeConfig = HandshakeConfig{
+		tryInterval:   DefaultHandshakeTryInterval,
+		retries:       DefaultHandshakeRetries,
+		triggerBuffer: DefaultHandshakeTriggerBuffer,
+		useRelays:     DefaultUseRelays,
+	}
+)
+
+type HandshakeConfig struct {
+	tryInterval   time.Duration
+	retries       int
+	triggerBuffer int
+	useRelays     bool
+
+	messageMetrics *MessageMetrics
+}
+
 type HandshakeManager struct {
 	pendingHostMap         *HostMap
 	mainHostMap            *HostMap
 	lightHouse             *LightHouse
-	outside        *udpConn
+	outside                *udp.Conn
-
+	config                 HandshakeConfig
 	OutboundHandshakeTimer *SystemTimerWheel
-	InboundHandshakeTimer  *SystemTimerWheel
+	messageMetrics         *MessageMetrics
+	metricInitiated        metrics.Counter
+	metricTimedOut         metrics.Counter
+	l                      *logrus.Logger
+
+	// can be used to trigger outbound handshake for the given vpnIp
+	trigger chan iputil.VpnIp
 }
 
-func NewHandshakeManager(tunCidr *net.IPNet, preferredRanges []*net.IPNet, mainHostMap *HostMap, lightHouse *LightHouse, outside *udpConn) *HandshakeManager {
+func NewHandshakeManager(l *logrus.Logger, tunCidr *net.IPNet, preferredRanges []*net.IPNet, mainHostMap *HostMap, lightHouse *LightHouse, outside *udp.Conn, config HandshakeConfig) *HandshakeManager {
 	return &HandshakeManager{
-		pendingHostMap: NewHostMap("pending", tunCidr, preferredRanges),
+		pendingHostMap:         NewHostMap(l, "pending", tunCidr, preferredRanges),
 		mainHostMap:            mainHostMap,
 		lightHouse:             lightHouse,
 		outside:                outside,
-
+		config:                 config,
-		OutboundHandshakeTimer: NewSystemTimerWheel(HandshakeTryInterval, HandshakeTryInterval*HandshakeRetries),
+		trigger:                make(chan iputil.VpnIp, config.triggerBuffer),
-		InboundHandshakeTimer:  NewSystemTimerWheel(HandshakeTryInterval, HandshakeTryInterval*HandshakeRetries),
+		OutboundHandshakeTimer: NewSystemTimerWheel(config.tryInterval, hsTimeout(config.retries, config.tryInterval)),
+		messageMetrics:         config.messageMetrics,
+		metricInitiated:        metrics.GetOrRegisterCounter("handshake_manager.initiated", nil),
+		metricTimedOut:         metrics.GetOrRegisterCounter("handshake_manager.timed_out", nil),
+		l:                      l,
 	}
 }
 
-func (c *HandshakeManager) Run(f EncWriter) {
+func (c *HandshakeManager) Run(ctx context.Context, f udp.EncWriter) {
-	clockSource := time.Tick(HandshakeTryInterval)
+	clockSource := time.NewTicker(c.config.tryInterval)
-	for now := range clockSource {
+	defer clockSource.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case vpnIP := <-c.trigger:
+			c.handleOutbound(vpnIP, f, true)
+		case now := <-clockSource.C:
 			c.NextOutboundHandshakeTimerTick(now, f)
-		c.NextInboundHandshakeTimerTick(now)
+		}
 	}
 }
 
-func (c *HandshakeManager) NextOutboundHandshakeTimerTick(now time.Time, f EncWriter) {
+func (c *HandshakeManager) NextOutboundHandshakeTimerTick(now time.Time, f udp.EncWriter) {
 	c.OutboundHandshakeTimer.advance(now)
 	for {
 		ep := c.OutboundHandshakeTimer.Purge()
 		if ep == nil {
 			break
 		}
-		vpnIP := ep.(uint32)
+		vpnIp := ep.(iputil.VpnIp)
+		c.handleOutbound(vpnIp, f, false)
+	}
+}
 
-		index, err := c.pendingHostMap.GetIndexByVpnIP(vpnIP)
+func (c *HandshakeManager) handleOutbound(vpnIp iputil.VpnIp, f udp.EncWriter, lighthouseTriggered bool) {
+	hostinfo, err := c.pendingHostMap.QueryVpnIp(vpnIp)
 	if err != nil {
-			continue
+		return
+	}
+	hostinfo.Lock()
+	defer hostinfo.Unlock()
+
+	// We may have raced to completion but now that we have a lock we should ensure we have not yet completed.
+	if hostinfo.HandshakeComplete {
+		// Ensure we don't exist in the pending hostmap anymore since we have completed
+		c.pendingHostMap.DeleteHostInfo(hostinfo)
+		return
 	}
 
-		hostinfo, err := c.pendingHostMap.QueryVpnIP(vpnIP)
+	// Check if we have a handshake packet to transmit yet
-		if err != nil {
+	if !hostinfo.HandshakeReady {
-			continue
+		// There is currently a slight race in getOrHandshake due to ConnectionState not being part of the HostInfo directly
+		// Our hostinfo here was added to the pending map and the wheel may have ticked to us before we created ConnectionState
+		c.OutboundHandshakeTimer.Add(vpnIp, c.config.tryInterval*time.Duration(hostinfo.HandshakeCounter))
+		return
 	}
 
-		// If we haven't finished the handshake and we haven't hit max retries, query
+	// If we are out of time, clean up
-		// lighthouse and then send the handshake packet again.
+	if hostinfo.HandshakeCounter >= c.config.retries {
-		if hostinfo.HandshakeCounter < HandshakeRetries && !hostinfo.HandshakeComplete {
+		hostinfo.logger(c.l).WithField("udpAddrs", hostinfo.remotes.CopyAddrs(c.pendingHostMap.preferredRanges)).
-			if hostinfo.remote == nil {
-				// We continue to query the lighthouse because hosts may
-				// come online during handshake retries. If the query
-				// succeeds (no error), add the lighthouse info to hostinfo
-				ips, err := c.lightHouse.Query(vpnIP, f)
-				if err == nil {
-					for _, ip := range ips {
-						hostinfo.AddRemote(ip)
-					}
-					hostinfo.ForcePromoteBest(c.mainHostMap.preferredRanges)
-				}
-			}
-
-			hostinfo.HandshakeCounter++
-
-			// We want to use the "best" calculated ip for the first 5 attempts, after that we just blindly rotate through
-			// all the others until we can stand up a connection.
-			if hostinfo.HandshakeCounter > HandshakeWaitRotation {
-				hostinfo.rotateRemote()
-			}
-
-			// Ensure the handshake is ready to avoid a race in timer tick and stage 0 handshake generation
-			if hostinfo.HandshakeReady && hostinfo.remote != nil {
-				err := c.outside.WriteTo(hostinfo.HandshakePacket[0], hostinfo.remote)
-				if err != nil {
-					l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", hostinfo.remote).
 			WithField("initiatorIndex", hostinfo.localIndexId).
 			WithField("remoteIndex", hostinfo.remoteIndexId).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
-						WithError(err).Error("Failed to send handshake message")
+			WithField("durationNs", time.Since(hostinfo.handshakeStart).Nanoseconds()).
-				} else {
+			Info("Handshake timed out")
-					//TODO: this log line is assuming a lot of stuff around the cached stage 0 handshake packet, we should
+		c.metricTimedOut.Inc(1)
-					// keep the real packet struct around for logging purposes
+		c.pendingHostMap.DeleteHostInfo(hostinfo)
-					l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", hostinfo.remote).
+		return
+	}
+
+	// We only care about a lighthouse trigger before the first handshake transmit attempt. This is a very specific
+	// optimization for a fast lighthouse reply
+	//TODO: it would feel better to do this once, anytime, as our delay increases over time
+	if lighthouseTriggered && hostinfo.HandshakeCounter > 0 {
+		// If we didn't return here a lighthouse could cause us to aggressively send handshakes
+		return
+	}
+
+	// Get a remotes object if we don't already have one.
+	// This is mainly to protect us as this should never be the case
+	// NB ^ This comment doesn't jive. It's how the thing gets intiailized.
+	// It's the common path. Should it update every time, in case a future LH query/queries give us more info?
+	if hostinfo.remotes == nil {
+		hostinfo.remotes = c.lightHouse.QueryCache(vpnIp)
+	}
+
+	//TODO: this will generate a load of queries for hosts with only 1 ip (i'm not using a lighthouse, static mapped)
+	if hostinfo.remotes.Len(c.pendingHostMap.preferredRanges) <= 1 {
+		// If we only have 1 remote it is highly likely our query raced with the other host registered within the lighthouse
+		// Our vpnIp here has a tunnel with a lighthouse but has yet to send a host update packet there so we only know about
+		// the learned public ip for them. Query again to short circuit the promotion counter
+		c.lightHouse.QueryServer(vpnIp, f)
+	}
+
+	// Send a the handshake to all known ips, stage 2 takes care of assigning the hostinfo.remote based on the first to reply
+	var sentTo []*udp.Addr
+	hostinfo.remotes.ForEach(c.pendingHostMap.preferredRanges, func(addr *udp.Addr, _ bool) {
+		c.messageMetrics.Tx(header.Handshake, header.MessageSubType(hostinfo.HandshakePacket[0][1]), 1)
+		err = c.outside.WriteTo(hostinfo.HandshakePacket[0], addr)
+		if err != nil {
+			hostinfo.logger(c.l).WithField("udpAddr", addr).
+				WithField("initiatorIndex", hostinfo.localIndexId).
+				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+				WithError(err).Error("Failed to send handshake message")
+
+		} else {
+			sentTo = append(sentTo, addr)
+		}
+	})
+
+	// Don't be too noisy or confusing if we fail to send a handshake - if we don't get through we'll eventually log a timeout
+	if len(sentTo) > 0 {
+		hostinfo.logger(c.l).WithField("udpAddrs", sentTo).
 			WithField("initiatorIndex", hostinfo.localIndexId).
-						WithField("remoteIndex", hostinfo.remoteIndexId).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
 			Info("Handshake message sent")
 	}
-			}
 
-			// Readd to the timer wheel so we continue trying wait HandshakeTryInterval * counter longer for next try
+	if c.config.useRelays && len(hostinfo.remotes.relays) > 0 {
-			//l.Infoln("Interval: ", HandshakeTryInterval*time.Duration(hostinfo.HandshakeCounter))
+		hostinfo.logger(c.l).WithField("relayIps", hostinfo.remotes.relays).Info("Attempt to relay through hosts")
-			c.OutboundHandshakeTimer.Add(vpnIP, HandshakeTryInterval*time.Duration(hostinfo.HandshakeCounter))
+		// Send a RelayRequest to all known Relay IP's
-		} else {
+		for _, relay := range hostinfo.remotes.relays {
-			c.pendingHostMap.DeleteVpnIP(vpnIP)
+			// Don't relay to myself, and don't relay through the host I'm trying to connect to
-			c.pendingHostMap.DeleteIndex(index)
+			if *relay == vpnIp || *relay == c.lightHouse.myVpnIp {
-		}
-	}
-}
-
-func (c *HandshakeManager) NextInboundHandshakeTimerTick(now time.Time) {
-	c.InboundHandshakeTimer.advance(now)
-	for {
-		ep := c.InboundHandshakeTimer.Purge()
-		if ep == nil {
-			break
-		}
-		index := ep.(uint32)
-
-		vpnIP, err := c.pendingHostMap.GetVpnIPByIndex(index)
-		if err != nil {
 				continue
 			}
-		c.pendingHostMap.DeleteIndex(index)
+			relayHostInfo, err := c.mainHostMap.QueryVpnIp(*relay)
-		c.pendingHostMap.DeleteVpnIP(vpnIP)
+			if err != nil || relayHostInfo.remote == nil {
+				hostinfo.logger(c.l).WithError(err).WithField("relay", relay.String()).Info("Establish tunnel to relay target.")
+				f.Handshake(*relay)
+				continue
+			}
+			// Check the relay HostInfo to see if we already established a relay through it
+			if existingRelay, ok := relayHostInfo.relayState.QueryRelayForByIp(vpnIp); ok {
+				switch existingRelay.State {
+				case Established:
+					hostinfo.logger(c.l).WithField("relay", relay.String()).Info("Send handshake via relay")
+					f.SendVia(relayHostInfo, existingRelay, hostinfo.HandshakePacket[0], make([]byte, 12), make([]byte, mtu), false)
+				case Requested:
+					hostinfo.logger(c.l).WithField("relay", relay.String()).Info("Re-send CreateRelay request")
+					// Re-send the CreateRelay request, in case the previous one was lost.
+					m := NebulaControl{
+						Type:                NebulaControl_CreateRelayRequest,
+						InitiatorRelayIndex: existingRelay.LocalIndex,
+						RelayFromIp:         uint32(c.lightHouse.myVpnIp),
+						RelayToIp:           uint32(vpnIp),
+					}
+					msg, err := m.Marshal()
+					if err != nil {
+						hostinfo.logger(c.l).
+							WithError(err).
+							Error("Failed to marshal Control message to create relay")
+					} else {
+						f.SendMessageToVpnIp(header.Control, 0, *relay, msg, make([]byte, 12), make([]byte, mtu))
+					}
+				default:
+					hostinfo.logger(c.l).
+						WithField("vpnIp", vpnIp).
+						WithField("state", existingRelay.State).
+						WithField("relayVpnIp", relayHostInfo.vpnIp).
+						Errorf("Relay unexpected state")
+				}
+			} else {
+				// No relays exist or requested yet.
+				if relayHostInfo.remote != nil {
+					idx, err := AddRelay(c.l, relayHostInfo, c.mainHostMap, vpnIp, nil, TerminalType, Requested)
+					if err != nil {
+						hostinfo.logger(c.l).WithField("relay", relay.String()).WithError(err).Info("Failed to add relay to hostmap")
+					}
+
+					m := NebulaControl{
+						Type:                NebulaControl_CreateRelayRequest,
+						InitiatorRelayIndex: idx,
+						RelayFromIp:         uint32(c.lightHouse.myVpnIp),
+						RelayToIp:           uint32(vpnIp),
+					}
+					msg, err := m.Marshal()
+					if err != nil {
+						hostinfo.logger(c.l).
+							WithError(err).
+							Error("Failed to marshal Control message to create relay")
+					} else {
+						f.SendMessageToVpnIp(header.Control, 0, *relay, msg, make([]byte, 12), make([]byte, mtu))
+					}
+				}
+			}
+		}
+	}
+
+	// Increment the counter to increase our delay, linear backoff
+	hostinfo.HandshakeCounter++
+
+	// If a lighthouse triggered this attempt then we are still in the timer wheel and do not need to re-add
+	if !lighthouseTriggered {
+		//TODO: feel like we dupe handshake real fast in a tight loop, why?
+		c.OutboundHandshakeTimer.Add(vpnIp, c.config.tryInterval*time.Duration(hostinfo.HandshakeCounter))
 	}
 }
 
-func (c *HandshakeManager) AddVpnIP(vpnIP uint32) *HostInfo {
+func (c *HandshakeManager) AddVpnIp(vpnIp iputil.VpnIp, init func(*HostInfo)) *HostInfo {
-	hostinfo := c.pendingHostMap.AddVpnIP(vpnIP)
+	hostinfo, created := c.pendingHostMap.AddVpnIp(vpnIp, init)
-	// We lock here and use an array to insert items to prevent locking the
+
-	// main receive thread for very long by waiting to add items to the pending map
+	if created {
-	c.OutboundHandshakeTimer.Add(vpnIP, HandshakeTryInterval)
+		c.OutboundHandshakeTimer.Add(vpnIp, c.config.tryInterval)
+		c.metricInitiated.Inc(1)
+	}
+
 	return hostinfo
 }
 
-func (c *HandshakeManager) DeleteVpnIP(vpnIP uint32) {
+var (
-	//l.Debugln("Deleting pending vpn ip :", IntIp(vpnIP))
+	ErrExistingHostInfo    = errors.New("existing hostinfo")
-	c.pendingHostMap.DeleteVpnIP(vpnIP)
+	ErrAlreadySeen         = errors.New("already seen")
-}
+	ErrLocalIndexCollision = errors.New("local index collision")
+	ErrExistingHandshake   = errors.New("existing handshake")
+)
 
-func (c *HandshakeManager) AddIndex(index uint32, ci *ConnectionState) (*HostInfo, error) {
+// CheckAndComplete checks for any conflicts in the main and pending hostmap
-	hostinfo, err := c.pendingHostMap.AddIndex(index, ci)
+// before adding hostinfo to main. If err is nil, it was added. Otherwise err will be:
-	if err != nil {
+//
-		return nil, fmt.Errorf("Issue adding index: %d", index)
+// ErrAlreadySeen if we already have an entry in the hostmap that has seen the
+// exact same handshake packet
+//
+// ErrExistingHostInfo if we already have an entry in the hostmap for this
+// VpnIp and the new handshake was older than the one we currently have
+//
+// ErrLocalIndexCollision if we already have an entry in the main or pending
+// hostmap for the hostinfo.localIndexId.
+func (c *HandshakeManager) CheckAndComplete(hostinfo *HostInfo, handshakePacket uint8, overwrite bool, f *Interface) (*HostInfo, error) {
+	c.pendingHostMap.Lock()
+	defer c.pendingHostMap.Unlock()
+	c.mainHostMap.Lock()
+	defer c.mainHostMap.Unlock()
+
+	// Check if we already have a tunnel with this vpn ip
+	existingHostInfo, found := c.mainHostMap.Hosts[hostinfo.vpnIp]
+	if found && existingHostInfo != nil {
+		// Is it just a delayed handshake packet?
+		if bytes.Equal(hostinfo.HandshakePacket[handshakePacket], existingHostInfo.HandshakePacket[handshakePacket]) {
+			return existingHostInfo, ErrAlreadySeen
 		}
-	//c.mainHostMap.AddIndexHostInfo(index, hostinfo)
+
-	c.InboundHandshakeTimer.Add(index, time.Second*10)
+		// Is this a newer handshake?
-	return hostinfo, nil
+		if existingHostInfo.lastHandshakeTime >= hostinfo.lastHandshakeTime {
+			return existingHostInfo, ErrExistingHostInfo
+		}
+
+		existingHostInfo.logger(c.l).Info("Taking new handshake")
+	}
+
+	existingIndex, found := c.mainHostMap.Indexes[hostinfo.localIndexId]
+	if found {
+		// We have a collision, but for a different hostinfo
+		return existingIndex, ErrLocalIndexCollision
+	}
+
+	existingIndex, found = c.pendingHostMap.Indexes[hostinfo.localIndexId]
+	if found && existingIndex != hostinfo {
+		// We have a collision, but for a different hostinfo
+		return existingIndex, ErrLocalIndexCollision
+	}
+
+	existingRemoteIndex, found := c.mainHostMap.RemoteIndexes[hostinfo.remoteIndexId]
+	if found && existingRemoteIndex != nil && existingRemoteIndex.vpnIp != hostinfo.vpnIp {
+		// We have a collision, but this can happen since we can't control
+		// the remote ID. Just log about the situation as a note.
+		hostinfo.logger(c.l).
+			WithField("remoteIndex", hostinfo.remoteIndexId).WithField("collision", existingRemoteIndex.vpnIp).
+			Info("New host shadows existing host remoteIndex")
+	}
+
+	// Check if we are also handshaking with this vpn ip
+	pendingHostInfo, found := c.pendingHostMap.Hosts[hostinfo.vpnIp]
+	if found && pendingHostInfo != nil {
+		if !overwrite {
+			// We won, let our pending handshake win
+			return pendingHostInfo, ErrExistingHandshake
+		}
+
+		// We lost, take this handshake and move any cached packets over so they get sent
+		pendingHostInfo.ConnectionState.queueLock.Lock()
+		hostinfo.packetStore = append(hostinfo.packetStore, pendingHostInfo.packetStore...)
+		c.pendingHostMap.unlockedDeleteHostInfo(pendingHostInfo)
+		pendingHostInfo.ConnectionState.queueLock.Unlock()
+		pendingHostInfo.logger(c.l).Info("Handshake race lost, replacing pending handshake with completed tunnel")
+	}
+
+	if existingHostInfo != nil {
+		// We are going to overwrite this entry, so remove the old references
+		delete(c.mainHostMap.Hosts, existingHostInfo.vpnIp)
+		delete(c.mainHostMap.Indexes, existingHostInfo.localIndexId)
+		delete(c.mainHostMap.RemoteIndexes, existingHostInfo.remoteIndexId)
+		for _, relayIdx := range existingHostInfo.relayState.CopyRelayForIdxs() {
+			delete(c.mainHostMap.Relays, relayIdx)
+		}
+	}
+
+	c.mainHostMap.addHostInfo(hostinfo, f)
+	return existingHostInfo, nil
 }
 
-func (c *HandshakeManager) AddIndexHostInfo(index uint32, h *HostInfo) {
+// Complete is a simpler version of CheckAndComplete when we already know we
-	c.pendingHostMap.AddIndexHostInfo(index, h)
+// won't have a localIndexId collision because we already have an entry in the
+// pendingHostMap
+func (c *HandshakeManager) Complete(hostinfo *HostInfo, f *Interface) {
+	c.pendingHostMap.Lock()
+	defer c.pendingHostMap.Unlock()
+	c.mainHostMap.Lock()
+	defer c.mainHostMap.Unlock()
+
+	existingHostInfo, found := c.mainHostMap.Hosts[hostinfo.vpnIp]
+	if found && existingHostInfo != nil {
+		// We are going to overwrite this entry, so remove the old references
+		delete(c.mainHostMap.Hosts, existingHostInfo.vpnIp)
+		delete(c.mainHostMap.Indexes, existingHostInfo.localIndexId)
+		delete(c.mainHostMap.RemoteIndexes, existingHostInfo.remoteIndexId)
+		for _, relayIdx := range existingHostInfo.relayState.CopyRelayForIdxs() {
+			delete(c.mainHostMap.Relays, relayIdx)
+		}
+	}
+
+	existingRemoteIndex, found := c.mainHostMap.RemoteIndexes[hostinfo.remoteIndexId]
+	if found && existingRemoteIndex != nil {
+		// We have a collision, but this can happen since we can't control
+		// the remote ID. Just log about the situation as a note.
+		hostinfo.logger(c.l).
+			WithField("remoteIndex", hostinfo.remoteIndexId).WithField("collision", existingRemoteIndex.vpnIp).
+			Info("New host shadows existing host remoteIndex")
+	}
+
+	c.mainHostMap.addHostInfo(hostinfo, f)
+	c.pendingHostMap.unlockedDeleteHostInfo(hostinfo)
 }
 
-func (c *HandshakeManager) DeleteIndex(index uint32) {
+// AddIndexHostInfo generates a unique localIndexId for this HostInfo
-	//l.Debugln("Deleting pending index :", index)
+// and adds it to the pendingHostMap. Will error if we are unable to generate
-	c.pendingHostMap.DeleteIndex(index)
+// a unique localIndexId
+func (c *HandshakeManager) AddIndexHostInfo(h *HostInfo) error {
+	c.pendingHostMap.Lock()
+	defer c.pendingHostMap.Unlock()
+	c.mainHostMap.RLock()
+	defer c.mainHostMap.RUnlock()
+
+	for i := 0; i < 32; i++ {
+		index, err := generateIndex(c.l)
+		if err != nil {
+			return err
+		}
+
+		_, inPending := c.pendingHostMap.Indexes[index]
+		_, inMain := c.mainHostMap.Indexes[index]
+
+		if !inMain && !inPending {
+			h.localIndexId = index
+			c.pendingHostMap.Indexes[index] = h
+			return nil
+		}
+	}
+
+	return errors.New("failed to generate unique localIndexId")
+}
+
+func (c *HandshakeManager) addRemoteIndexHostInfo(index uint32, h *HostInfo) {
+	c.pendingHostMap.addRemoteIndexHostInfo(index, h)
+}
+
+func (c *HandshakeManager) DeleteHostInfo(hostinfo *HostInfo) {
+	//l.Debugln("Deleting pending hostinfo :", hostinfo)
+	c.pendingHostMap.DeleteHostInfo(hostinfo)
 }
 
 func (c *HandshakeManager) QueryIndex(index uint32) (*HostInfo, error) {
@@ -183,18 +449,28 @@ func (c *HandshakeManager) EmitStats() {
 
 // Utility functions below
 
-func generateIndex() (uint32, error) {
+func generateIndex(l *logrus.Logger) (uint32, error) {
 	b := make([]byte, 4)
+
+	// Let zero mean we don't know the ID, so don't generate zero
+	var index uint32
+	for index == 0 {
 		_, err := rand.Read(b)
 		if err != nil {
 			l.Errorln(err)
 			return 0, err
 		}
 
-	index := binary.BigEndian.Uint32(b)
+		index = binary.BigEndian.Uint32(b)
+	}
+
 	if l.Level >= logrus.DebugLevel {
 		l.WithField("index", index).
 			Debug("Generated index")
 	}
 	return index, nil
 }
+
+func hsTimeout(tries int, interval time.Duration) time.Duration {
+	return time.Duration(tries / 2 * ((2 * int(interval)) + (tries-1)*int(interval)))
+}

handshake_manager_test.go

@@ -5,190 +5,136 @@ import (
 	"testing"
 	"time"
 
+	"github.com/slackhq/nebula/header"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/test"
+	"github.com/slackhq/nebula/udp"
 	"github.com/stretchr/testify/assert"
 )
 
-var indexes []uint32 = []uint32{1000, 2000, 3000, 4000}
+func Test_NewHandshakeManagerVpnIp(t *testing.T) {
-
+	l := test.NewLogger()
-//var ips []uint32 = []uint32{9000, 9999999, 3, 292394923}
-var ips []uint32
-
-func Test_NewHandshakeManagerIndex(t *testing.T) {
 	_, tuncidr, _ := net.ParseCIDR("172.1.1.1/24")
 	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
 	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
-	ips = []uint32{ip2int(net.ParseIP("172.1.1.2"))}
+	ip := iputil.Ip2VpnIp(net.ParseIP("172.1.1.2"))
-	preferredRanges := []*net.IPNet{localrange}
-	mainHM := NewHostMap("test", vpncidr, preferredRanges)
-
-	blah := NewHandshakeManager(tuncidr, preferredRanges, mainHM, &LightHouse{}, &udpConn{})
-
-	now := time.Now()
-	blah.NextInboundHandshakeTimerTick(now)
-
-	// Add four indexes
-	for _, v := range indexes {
-		blah.AddIndex(v, &ConnectionState{})
-	}
-	// Confirm they are in the pending index list
-	for _, v := range indexes {
-		assert.Contains(t, blah.pendingHostMap.Indexes, uint32(v))
-	}
-	// Adding something to pending should not affect the main hostmap
-	assert.Len(t, mainHM.Indexes, 0)
-	// Jump ahead 8 seconds
-	for i := 1; i <= HandshakeRetries; i++ {
-		next_tick := now.Add(HandshakeTryInterval * time.Duration(i))
-		blah.NextInboundHandshakeTimerTick(next_tick)
-	}
-	// Confirm they are still in the pending index list
-	for _, v := range indexes {
-		assert.Contains(t, blah.pendingHostMap.Indexes, uint32(v))
-	}
-	// Jump ahead 4 more seconds
-	next_tick := now.Add(12 * time.Second)
-	blah.NextInboundHandshakeTimerTick(next_tick)
-	// Confirm they have been removed
-	for _, v := range indexes {
-		assert.NotContains(t, blah.pendingHostMap.Indexes, uint32(v))
-	}
-}
-
-func Test_NewHandshakeManagerVpnIP(t *testing.T) {
-	_, tuncidr, _ := net.ParseCIDR("172.1.1.1/24")
-	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
-	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
-	ips = []uint32{ip2int(net.ParseIP("172.1.1.2"))}
 	preferredRanges := []*net.IPNet{localrange}
 	mw := &mockEncWriter{}
-	mainHM := NewHostMap("test", vpncidr, preferredRanges)
+	mainHM := NewHostMap(l, "test", vpncidr, preferredRanges)
+	lh := &LightHouse{
+		atomicStaticList:  make(map[iputil.VpnIp]struct{}),
+		atomicLighthouses: make(map[iputil.VpnIp]struct{}),
+		addrMap:           make(map[iputil.VpnIp]*RemoteList),
+	}
 
-	blah := NewHandshakeManager(tuncidr, preferredRanges, mainHM, &LightHouse{}, &udpConn{})
+	blah := NewHandshakeManager(l, tuncidr, preferredRanges, mainHM, lh, &udp.Conn{}, defaultHandshakeConfig)
 
 	now := time.Now()
 	blah.NextOutboundHandshakeTimerTick(now, mw)
 
-	// Add four "IPs" - which are just uint32s
+	var initCalled bool
-	for _, v := range ips {
+	initFunc := func(*HostInfo) {
-		blah.AddVpnIP(v)
+		initCalled = true
 	}
+
+	i := blah.AddVpnIp(ip, initFunc)
+	assert.True(t, initCalled)
+
+	initCalled = false
+	i2 := blah.AddVpnIp(ip, initFunc)
+	assert.False(t, initCalled)
+	assert.Same(t, i, i2)
+
+	i.remotes = NewRemoteList()
+	i.HandshakeReady = true
+
 	// Adding something to pending should not affect the main hostmap
 	assert.Len(t, mainHM.Hosts, 0)
-	// Confirm they are in the pending index list
-	for _, v := range ips {
-		assert.Contains(t, blah.pendingHostMap.Hosts, uint32(v))
-	}
 
-	// Jump ahead `HandshakeRetries` ticks
+	// Confirm they are in the pending index list
-	cumulative := time.Duration(0)
+	assert.Contains(t, blah.pendingHostMap.Hosts, ip)
-	for i := 0; i <= HandshakeRetries+1; i++ {
+
-		cumulative += time.Duration(i)*HandshakeTryInterval + 1
+	// Jump ahead `HandshakeRetries` ticks, offset by one to get the sleep logic right
-		next_tick := now.Add(cumulative)
+	for i := 1; i <= DefaultHandshakeRetries+1; i++ {
-		//l.Infoln(next_tick)
+		now = now.Add(time.Duration(i) * DefaultHandshakeTryInterval)
-		blah.NextOutboundHandshakeTimerTick(next_tick, mw)
+		blah.NextOutboundHandshakeTimerTick(now, mw)
 	}
 
 	// Confirm they are still in the pending index list
-	for _, v := range ips {
+	assert.Contains(t, blah.pendingHostMap.Hosts, ip)
-		assert.Contains(t, blah.pendingHostMap.Hosts, uint32(v))
+
-	}
+	// Tick 1 more time, a minute will certainly flush it out
-	// Jump ahead 1 more second
+	blah.NextOutboundHandshakeTimerTick(now.Add(time.Minute), mw)
-	cumulative += time.Duration(HandshakeRetries+1) * HandshakeTryInterval
+
-	next_tick := now.Add(cumulative)
-	//l.Infoln(next_tick)
-	blah.NextOutboundHandshakeTimerTick(next_tick, mw)
 	// Confirm they have been removed
-	for _, v := range ips {
+	assert.NotContains(t, blah.pendingHostMap.Hosts, ip)
-		assert.NotContains(t, blah.pendingHostMap.Hosts, uint32(v))
-	}
 }
 
-func Test_NewHandshakeManagerVpnIPcleanup(t *testing.T) {
+func Test_NewHandshakeManagerTrigger(t *testing.T) {
+	l := test.NewLogger()
 	_, tuncidr, _ := net.ParseCIDR("172.1.1.1/24")
 	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
 	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
-	vpnIP = ip2int(net.ParseIP("172.1.1.2"))
+	ip := iputil.Ip2VpnIp(net.ParseIP("172.1.1.2"))
 	preferredRanges := []*net.IPNet{localrange}
 	mw := &mockEncWriter{}
-	mainHM := NewHostMap("test", vpncidr, preferredRanges)
+	mainHM := NewHostMap(l, "test", vpncidr, preferredRanges)
+	lh := &LightHouse{
+		addrMap:           make(map[iputil.VpnIp]*RemoteList),
+		l:                 l,
+		atomicStaticList:  make(map[iputil.VpnIp]struct{}),
+		atomicLighthouses: make(map[iputil.VpnIp]struct{}),
+	}
 
-	blah := NewHandshakeManager(tuncidr, preferredRanges, mainHM, &LightHouse{}, &udpConn{})
+	blah := NewHandshakeManager(l, tuncidr, preferredRanges, mainHM, lh, &udp.Conn{}, defaultHandshakeConfig)
 
 	now := time.Now()
 	blah.NextOutboundHandshakeTimerTick(now, mw)
 
-	hostinfo := blah.AddVpnIP(vpnIP)
+	assert.Equal(t, 0, testCountTimerWheelEntries(blah.OutboundHandshakeTimer))
-	// Pretned we have an index too
-	blah.AddIndexHostInfo(12341234, hostinfo)
-	assert.Contains(t, blah.pendingHostMap.Indexes, uint32(12341234))
 
-	// Jump ahead `HandshakeRetries` ticks. Eviction should happen in pending
+	hi := blah.AddVpnIp(ip, nil)
-	// but not main hostmap
+	hi.HandshakeReady = true
-	cumulative := time.Duration(0)
+	assert.Equal(t, 1, testCountTimerWheelEntries(blah.OutboundHandshakeTimer))
-	for i := 1; i <= HandshakeRetries+2; i++ {
+	assert.Equal(t, 0, hi.HandshakeCounter, "Should not have attempted a handshake yet")
-		cumulative += HandshakeTryInterval * time.Duration(i)
-		next_tick := now.Add(cumulative)
-		blah.NextOutboundHandshakeTimerTick(next_tick, mw)
-	}
-	/*
-		for i := 0; i <= HandshakeRetries+1; i++ {
-			next_tick := now.Add(cumulative)
-			//l.Infoln(next_tick)
-			blah.NextOutboundHandshakeTimerTick(next_tick)
-		}
-	*/
-	/*
-		for i := 0; i <= HandshakeRetries+1; i++ {
-			next_tick := now.Add(time.Duration(i) * time.Second)
-			blah.NextOutboundHandshakeTimerTick(next_tick)
-		}
-	*/
 
-	/*
+	// Trigger the same method the channel will but, this should set our remotes pointer
-		cumulative += HandshakeTryInterval*time.Duration(HandshakeRetries) + 3
+	blah.handleOutbound(ip, mw, true)
-		next_tick := now.Add(cumulative)
+	assert.Equal(t, 1, hi.HandshakeCounter, "Trigger should have done a handshake attempt")
-		l.Infoln(cumulative, next_tick)
+	assert.NotNil(t, hi.remotes, "Manager should have set my remotes pointer")
-		blah.NextOutboundHandshakeTimerTick(next_tick)
+
-	*/
+	// Make sure the trigger doesn't double schedule the timer entry
-	assert.NotContains(t, blah.pendingHostMap.Hosts, uint32(vpnIP))
+	assert.Equal(t, 1, testCountTimerWheelEntries(blah.OutboundHandshakeTimer))
-	assert.NotContains(t, blah.pendingHostMap.Indexes, uint32(12341234))
+
+	uaddr := udp.NewAddrFromString("10.1.1.1:4242")
+	hi.remotes.unlockedPrependV4(ip, NewIp4AndPort(uaddr.IP, uint32(uaddr.Port)))
+
+	// We now have remotes but only the first trigger should have pushed things forward
+	blah.handleOutbound(ip, mw, true)
+	assert.Equal(t, 1, hi.HandshakeCounter, "Trigger should have not done a handshake attempt")
+	assert.Equal(t, 1, testCountTimerWheelEntries(blah.OutboundHandshakeTimer))
 }
 
-func Test_NewHandshakeManagerIndexcleanup(t *testing.T) {
+func testCountTimerWheelEntries(tw *SystemTimerWheel) (c int) {
-	_, tuncidr, _ := net.ParseCIDR("172.1.1.1/24")
+	for _, i := range tw.wheel {
-	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
+		n := i.Head
-	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
+		for n != nil {
-	preferredRanges := []*net.IPNet{localrange}
+			c++
-	mainHM := NewHostMap("test", vpncidr, preferredRanges)
+			n = n.Next
-
-	blah := NewHandshakeManager(tuncidr, preferredRanges, mainHM, &LightHouse{}, &udpConn{})
-
-	now := time.Now()
-	blah.NextInboundHandshakeTimerTick(now)
-
-	hostinfo, _ := blah.AddIndex(12341234, &ConnectionState{})
-	// Pretned we have an index too
-	blah.pendingHostMap.AddVpnIPHostInfo(101010, hostinfo)
-	assert.Contains(t, blah.pendingHostMap.Hosts, uint32(101010))
-
-	for i := 1; i <= HandshakeRetries+2; i++ {
-		next_tick := now.Add(HandshakeTryInterval * time.Duration(i))
-		blah.NextInboundHandshakeTimerTick(next_tick)
 		}
-
+	}
-	next_tick := now.Add(HandshakeTryInterval*HandshakeRetries + 3)
+	return c
-	blah.NextInboundHandshakeTimerTick(next_tick)
-	assert.NotContains(t, blah.pendingHostMap.Hosts, uint32(101010))
-	assert.NotContains(t, blah.pendingHostMap.Indexes, uint32(12341234))
 }
 
 type mockEncWriter struct {
 }
 
-func (mw *mockEncWriter) SendMessageToVpnIp(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, nb, out []byte) {
+func (mw *mockEncWriter) SendMessageToVpnIp(t header.MessageType, st header.MessageSubType, vpnIp iputil.VpnIp, p, nb, out []byte) {
 	return
 }
 
-func (mw *mockEncWriter) SendMessageToAll(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, nb, out []byte) {
+func (mw *mockEncWriter) SendVia(via interface{}, relay interface{}, ad, nb, out []byte, nocopy bool) {
 	return
 }
+
+func (mw *mockEncWriter) Handshake(vpnIP iputil.VpnIp) {}

header/header.go

@@ -1,4 +1,4 @@
-package nebula
+package header
 
 import (
 	"encoding/binary"
@@ -19,82 +19,89 @@ import (
 // |-----------------------------------------------------------------------|
 // |                               payload...                              |
 
+type m map[string]interface{}
+
 const (
 	Version uint8 = 1
-	HeaderLen       = 16
+	Len           = 16
 )
 
-type NebulaMessageType uint8
+type MessageType uint8
-type NebulaMessageSubType uint8
+type MessageSubType uint8
 
 const (
-	handshake   NebulaMessageType = 0
+	Handshake   MessageType = 0
-	message     NebulaMessageType = 1
+	Message     MessageType = 1
-	recvError   NebulaMessageType = 2
+	RecvError   MessageType = 2
-	lightHouse  NebulaMessageType = 3
+	LightHouse  MessageType = 3
-	test        NebulaMessageType = 4
+	Test        MessageType = 4
-	closeTunnel NebulaMessageType = 5
+	CloseTunnel MessageType = 5
-
+	Control     MessageType = 6
-	//TODO These are deprecated as of 06/12/2018 - NB
-	testRemote      NebulaMessageType = 6
-	testRemoteReply NebulaMessageType = 7
 )
 
-var typeMap = map[NebulaMessageType]string{
+var typeMap = map[MessageType]string{
-	handshake:   "handshake",
+	Handshake:   "handshake",
-	message:     "message",
+	Message:     "message",
-	recvError:   "recvError",
+	RecvError:   "recvError",
-	lightHouse:  "lightHouse",
+	LightHouse:  "lightHouse",
-	test:        "test",
+	Test:        "test",
-	closeTunnel: "closeTunnel",
+	CloseTunnel: "closeTunnel",
-
+	Control:     "control",
-	//TODO These are deprecated as of 06/12/2018 - NB
-	testRemote:      "testRemote",
-	testRemoteReply: "testRemoteReply",
 }
 
 const (
-	testRequest NebulaMessageSubType = 0
+	MessageNone  MessageSubType = 0
-	testReply   NebulaMessageSubType = 1
+	MessageRelay MessageSubType = 1
 )
 
-var eHeaderTooShort = errors.New("header is too short")
+const (
+	TestRequest MessageSubType = 0
+	TestReply   MessageSubType = 1
+)
 
-var subTypeTestMap = map[NebulaMessageSubType]string{
+const (
-	testRequest: "testRequest",
+	HandshakeIXPSK0 MessageSubType = 0
-	testReply:   "testReply",
+	HandshakeXXPSK0 MessageSubType = 1
+)
+
+var ErrHeaderTooShort = errors.New("header is too short")
+
+var subTypeTestMap = map[MessageSubType]string{
+	TestRequest: "testRequest",
+	TestReply:   "testReply",
 }
 
-var subTypeNoneMap = map[NebulaMessageSubType]string{0: "none"}
+var subTypeNoneMap = map[MessageSubType]string{0: "none"}
 
-var subTypeMap = map[NebulaMessageType]*map[NebulaMessageSubType]string{
+var subTypeMap = map[MessageType]*map[MessageSubType]string{
-	message:     &subTypeNoneMap,
+	Message: {
-	recvError:   &subTypeNoneMap,
+		MessageNone:  "none",
-	lightHouse:  &subTypeNoneMap,
+		MessageRelay: "relay",
-	test:        &subTypeTestMap,
-	closeTunnel: &subTypeNoneMap,
-	handshake: {
-		handshakeIXPSK0: "ix_psk0",
 	},
-	//TODO: these are deprecated
+	RecvError:   &subTypeNoneMap,
-	testRemote:      &subTypeNoneMap,
+	LightHouse:  &subTypeNoneMap,
-	testRemoteReply: &subTypeNoneMap,
+	Test:        &subTypeTestMap,
+	CloseTunnel: &subTypeNoneMap,
+	Handshake: {
+		HandshakeIXPSK0: "ix_psk0",
+	},
+	Control: &subTypeNoneMap,
 }
 
-type Header struct {
+type H struct {
 	Version        uint8
-	Type           NebulaMessageType
+	Type           MessageType
-	Subtype        NebulaMessageSubType
+	Subtype        MessageSubType
 	Reserved       uint16
 	RemoteIndex    uint32
 	MessageCounter uint64
 }
 
-// HeaderEncode uses the provided byte array to encode the provided header values into.
+// Encode uses the provided byte array to encode the provided header values into.
 // Byte array must be capped higher than HeaderLen or this will panic
-func HeaderEncode(b []byte, v uint8, t uint8, st uint8, ri uint32, c uint64) []byte {
+func Encode(b []byte, v uint8, t MessageType, st MessageSubType, ri uint32, c uint64) []byte {
-	b = b[:HeaderLen]
+	b = b[:Len]
-	b[0] = byte(v<<4 | (t & 0x0f))
+	b[0] = v<<4 | byte(t&0x0f)
 	b[1] = byte(st)
 	binary.BigEndian.PutUint16(b[2:4], 0)
 	binary.BigEndian.PutUint32(b[4:8], ri)
@@ -103,7 +110,7 @@ func HeaderEncode(b []byte, v uint8, t uint8, st uint8, ri uint32, c uint64) []b
 }
 
 // String creates a readable string representation of a header
-func (h *Header) String() string {
+func (h *H) String() string {
 	if h == nil {
 		return "<nil>"
 	}
@@ -112,7 +119,7 @@ func (h *Header) String() string {
 }
 
 // MarshalJSON creates a json string representation of a header
-func (h *Header) MarshalJSON() ([]byte, error) {
+func (h *H) MarshalJSON() ([]byte, error) {
 	return json.Marshal(m{
 		"version":        h.Version,
 		"type":           h.TypeName(),
@@ -124,24 +131,24 @@ func (h *Header) MarshalJSON() ([]byte, error) {
 }
 
 // Encode turns header into bytes
-func (h *Header) Encode(b []byte) ([]byte, error) {
+func (h *H) Encode(b []byte) ([]byte, error) {
 	if h == nil {
 		return nil, errors.New("nil header")
 	}
 
-	return HeaderEncode(b, h.Version, uint8(h.Type), uint8(h.Subtype), h.RemoteIndex, h.MessageCounter), nil
+	return Encode(b, h.Version, h.Type, h.Subtype, h.RemoteIndex, h.MessageCounter), nil
 }
 
 // Parse is a helper function to parses given bytes into new Header struct
-func (h *Header) Parse(b []byte) error {
+func (h *H) Parse(b []byte) error {
-	if len(b) < HeaderLen {
+	if len(b) < Len {
-		return eHeaderTooShort
+		return ErrHeaderTooShort
 	}
 	// get upper 4 bytes
 	h.Version = uint8((b[0] >> 4) & 0x0f)
 	// get lower 4 bytes
-	h.Type = NebulaMessageType(b[0] & 0x0f)
+	h.Type = MessageType(b[0] & 0x0f)
-	h.Subtype = NebulaMessageSubType(b[1])
+	h.Subtype = MessageSubType(b[1])
 	h.Reserved = binary.BigEndian.Uint16(b[2:4])
 	h.RemoteIndex = binary.BigEndian.Uint32(b[4:8])
 	h.MessageCounter = binary.BigEndian.Uint64(b[8:16])
@@ -149,12 +156,12 @@ func (h *Header) Parse(b []byte) error {
 }
 
 // TypeName will transform the headers message type into a human string
-func (h *Header) TypeName() string {
+func (h *H) TypeName() string {
 	return TypeName(h.Type)
 }
 
 // TypeName will transform a nebula message type into a human string
-func TypeName(t NebulaMessageType) string {
+func TypeName(t MessageType) string {
 	if n, ok := typeMap[t]; ok {
 		return n
 	}
@@ -163,12 +170,12 @@ func TypeName(t NebulaMessageType) string {
 }
 
 // SubTypeName will transform the headers message sub type into a human string
-func (h *Header) SubTypeName() string {
+func (h *H) SubTypeName() string {
 	return SubTypeName(h.Type, h.Subtype)
 }
 
 // SubTypeName will transform a nebula message sub type into a human string
-func SubTypeName(t NebulaMessageType, s NebulaMessageSubType) string {
+func SubTypeName(t MessageType, s MessageSubType) string {
 	if n, ok := subTypeMap[t]; ok {
 		if x, ok := (*n)[s]; ok {
 			return x
@@ -179,8 +186,8 @@ func SubTypeName(t NebulaMessageType, s NebulaMessageSubType) string {
 }
 
 // NewHeader turns bytes into a header
-func NewHeader(b []byte) (*Header, error) {
+func NewHeader(b []byte) (*H, error) {
-	h := new(Header)
+	h := new(H)
 	if err := h.Parse(b); err != nil {
 		return nil, err
 	}

header/header_test.go

@@ -0,0 +1,120 @@
+package header
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type headerTest struct {
+	expectedBytes []byte
+	*H
+}
+
+// 0001 0010 00010010
+var headerBigEndianTests = []headerTest{{
+	expectedBytes: []byte{0x54, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x9},
+	// 1010 0000
+	H: &H{
+		// 1111 1+2+4+8 = 15
+		Version:        5,
+		Type:           4,
+		Subtype:        0,
+		Reserved:       0,
+		RemoteIndex:    10,
+		MessageCounter: 9,
+	},
+},
+}
+
+func TestEncode(t *testing.T) {
+	for _, tt := range headerBigEndianTests {
+		b, err := tt.Encode(make([]byte, Len))
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		assert.Equal(t, tt.expectedBytes, b)
+	}
+}
+
+func TestParse(t *testing.T) {
+	for _, tt := range headerBigEndianTests {
+		b := tt.expectedBytes
+		parsedHeader := &H{}
+		parsedHeader.Parse(b)
+
+		if !reflect.DeepEqual(tt.H, parsedHeader) {
+			t.Fatalf("got %#v; want %#v", parsedHeader, tt.H)
+		}
+	}
+}
+
+func TestTypeName(t *testing.T) {
+	assert.Equal(t, "test", TypeName(Test))
+	assert.Equal(t, "test", (&H{Type: Test}).TypeName())
+
+	assert.Equal(t, "unknown", TypeName(99))
+	assert.Equal(t, "unknown", (&H{Type: 99}).TypeName())
+}
+
+func TestSubTypeName(t *testing.T) {
+	assert.Equal(t, "testRequest", SubTypeName(Test, TestRequest))
+	assert.Equal(t, "testRequest", (&H{Type: Test, Subtype: TestRequest}).SubTypeName())
+
+	assert.Equal(t, "unknown", SubTypeName(99, TestRequest))
+	assert.Equal(t, "unknown", (&H{Type: 99, Subtype: TestRequest}).SubTypeName())
+
+	assert.Equal(t, "unknown", SubTypeName(Test, 99))
+	assert.Equal(t, "unknown", (&H{Type: Test, Subtype: 99}).SubTypeName())
+
+	assert.Equal(t, "none", SubTypeName(Message, 0))
+	assert.Equal(t, "none", (&H{Type: Message, Subtype: 0}).SubTypeName())
+}
+
+func TestTypeMap(t *testing.T) {
+	// Force people to document this stuff
+	assert.Equal(t, map[MessageType]string{
+		Handshake:   "handshake",
+		Message:     "message",
+		RecvError:   "recvError",
+		LightHouse:  "lightHouse",
+		Test:        "test",
+		CloseTunnel: "closeTunnel",
+		Control:     "control",
+	}, typeMap)
+
+	assert.Equal(t, map[MessageType]*map[MessageSubType]string{
+		Message: {
+			MessageNone:  "none",
+			MessageRelay: "relay",
+		},
+		RecvError:   &subTypeNoneMap,
+		LightHouse:  &subTypeNoneMap,
+		Test:        &subTypeTestMap,
+		CloseTunnel: &subTypeNoneMap,
+		Handshake: {
+			HandshakeIXPSK0: "ix_psk0",
+		},
+		Control: &subTypeNoneMap,
+	}, subTypeMap)
+}
+
+func TestHeader_String(t *testing.T) {
+	assert.Equal(
+		t,
+		"ver=100 type=test subtype=testRequest reserved=0x63 remoteindex=98 messagecounter=97",
+		(&H{100, Test, TestRequest, 99, 98, 97}).String(),
+	)
+}
+
+func TestHeader_MarshalJSON(t *testing.T) {
+	b, err := (&H{100, Test, TestRequest, 99, 98, 97}).MarshalJSON()
+	assert.Nil(t, err)
+	assert.Equal(
+		t,
+		"{\"messageCounter\":97,\"remoteIndex\":98,\"reserved\":99,\"subType\":\"testRequest\",\"type\":\"test\",\"version\":100}",
+		string(b),
+	)
+}

header_test.go

@@ -1,118 +0,0 @@
-package nebula
-
-import (
-	"github.com/stretchr/testify/assert"
-	"reflect"
-	"testing"
-)
-
-type headerTest struct {
-	expectedBytes []byte
-	*Header
-}
-
-// 0001 0010 00010010
-var headerBigEndianTests = []headerTest{{
-	expectedBytes: []byte{0x54, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x9},
-	// 1010 0000
-	Header: &Header{
-		// 1111 1+2+4+8 = 15
-		Version:        5,
-		Type:           4,
-		Subtype:        0,
-		Reserved:       0,
-		RemoteIndex:    10,
-		MessageCounter: 9,
-	},
-},
-}
-
-func TestEncode(t *testing.T) {
-	for _, tt := range headerBigEndianTests {
-		b, err := tt.Encode(make([]byte, HeaderLen))
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		assert.Equal(t, tt.expectedBytes, b)
-	}
-}
-
-func TestParse(t *testing.T) {
-	for _, tt := range headerBigEndianTests {
-		b := tt.expectedBytes
-		parsedHeader := &Header{}
-		parsedHeader.Parse(b)
-
-		if !reflect.DeepEqual(tt.Header, parsedHeader) {
-			t.Fatalf("got %#v; want %#v", parsedHeader, tt.Header)
-		}
-	}
-}
-
-func TestTypeName(t *testing.T) {
-	assert.Equal(t, "test", TypeName(test))
-	assert.Equal(t, "test", (&Header{Type: test}).TypeName())
-
-	assert.Equal(t, "unknown", TypeName(99))
-	assert.Equal(t, "unknown", (&Header{Type: 99}).TypeName())
-}
-
-func TestSubTypeName(t *testing.T) {
-	assert.Equal(t, "testRequest", SubTypeName(test, testRequest))
-	assert.Equal(t, "testRequest", (&Header{Type: test, Subtype: testRequest}).SubTypeName())
-
-	assert.Equal(t, "unknown", SubTypeName(99, testRequest))
-	assert.Equal(t, "unknown", (&Header{Type: 99, Subtype: testRequest}).SubTypeName())
-
-	assert.Equal(t, "unknown", SubTypeName(test, 99))
-	assert.Equal(t, "unknown", (&Header{Type: test, Subtype: 99}).SubTypeName())
-
-	assert.Equal(t, "none", SubTypeName(message, 0))
-	assert.Equal(t, "none", (&Header{Type: message, Subtype: 0}).SubTypeName())
-}
-
-func TestTypeMap(t *testing.T) {
-	// Force people to document this stuff
-	assert.Equal(t, map[NebulaMessageType]string{
-		handshake:       "handshake",
-		message:         "message",
-		recvError:       "recvError",
-		lightHouse:      "lightHouse",
-		test:            "test",
-		closeTunnel:     "closeTunnel",
-		testRemote:      "testRemote",
-		testRemoteReply: "testRemoteReply",
-	}, typeMap)
-
-	assert.Equal(t, map[NebulaMessageType]*map[NebulaMessageSubType]string{
-		message:     &subTypeNoneMap,
-		recvError:   &subTypeNoneMap,
-		lightHouse:  &subTypeNoneMap,
-		test:        &subTypeTestMap,
-		closeTunnel: &subTypeNoneMap,
-		handshake: {
-			handshakeIXPSK0: "ix_psk0",
-		},
-		testRemote:      &subTypeNoneMap,
-		testRemoteReply: &subTypeNoneMap,
-	}, subTypeMap)
-}
-
-func TestHeader_String(t *testing.T) {
-	assert.Equal(
-		t,
-		"ver=100 type=test subtype=testRequest reserved=0x63 remoteindex=98 messagecounter=97",
-		(&Header{100, test, testRequest, 99, 98, 97}).String(),
-	)
-}
-
-func TestHeader_MarshalJSON(t *testing.T) {
-	b, err := (&Header{100, test, testRequest, 99, 98, 97}).MarshalJSON()
-	assert.Nil(t, err)
-	assert.Equal(
-		t,
-		"{\"messageCounter\":97,\"remoteIndex\":98,\"reserved\":99,\"subType\":\"testRequest\",\"type\":\"test\",\"version\":100}",
-		string(b),
-	)
-}

hostmap_test.go

@@ -1,166 +1 @@
 package nebula
-
-import (
-	"net"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-/*
-func TestHostInfoDestProbe(t *testing.T) {
-	a, _ := net.ResolveUDPAddr("udp", "1.0.0.1:22222")
-	d := NewHostInfoDest(a)
-
-	// 999 probes that all return should give a 100% success rate
-	for i := 0; i < 999; i++ {
-		meh := d.Probe()
-		d.ProbeReceived(meh)
-	}
-	assert.Equal(t, d.Grade(), float64(1))
-
-	// 999 probes of which only half return should give a 50% success rate
-	for i := 0; i < 999; i++ {
-		meh := d.Probe()
-		if i%2 == 0 {
-			d.ProbeReceived(meh)
-		}
-	}
-	assert.Equal(t, d.Grade(), float64(.5))
-
-	// 999 probes of which none return should give a 0% success rate
-	for i := 0; i < 999; i++ {
-		d.Probe()
-	}
-	assert.Equal(t, d.Grade(), float64(0))
-
-	// 999 probes of which only 1/4 return should give a 25% success rate
-	for i := 0; i < 999; i++ {
-		meh := d.Probe()
-		if i%4 == 0 {
-			d.ProbeReceived(meh)
-		}
-	}
-	assert.Equal(t, d.Grade(), float64(.25))
-
-	// 999 probes of which only half return and are duplicates should give a 50% success rate
-	for i := 0; i < 999; i++ {
-		meh := d.Probe()
-		if i%2 == 0 {
-			d.ProbeReceived(meh)
-			d.ProbeReceived(meh)
-		}
-	}
-	assert.Equal(t, d.Grade(), float64(.5))
-
-	// 999 probes of which only way old replies return should give a 0% success rate
-	for i := 0; i < 999; i++ {
-		meh := d.Probe()
-		d.ProbeReceived(meh - 101)
-	}
-	assert.Equal(t, d.Grade(), float64(0))
-
-}
-*/
-
-func TestHostmap(t *testing.T) {
-	_, myNet, _ := net.ParseCIDR("10.128.0.0/16")
-	_, localToMe, _ := net.ParseCIDR("192.168.1.0/24")
-	myNets := []*net.IPNet{myNet}
-	preferredRanges := []*net.IPNet{localToMe}
-
-	m := NewHostMap("test", myNet, preferredRanges)
-
-	a := NewUDPAddrFromString("10.127.0.3:11111")
-	b := NewUDPAddrFromString("1.0.0.1:22222")
-	y := NewUDPAddrFromString("10.128.0.3:11111")
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), a)
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), b)
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), y)
-
-	info, _ := m.QueryVpnIP(ip2int(net.ParseIP("10.128.1.1")))
-
-	// There should be three remotes in the host map
-	assert.Equal(t, 3, len(info.Remotes))
-
-	// Adding an identical remote should not change the count
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), y)
-	assert.Equal(t, 3, len(info.Remotes))
-
-	// Adding a fresh remote should add one
-	y = NewUDPAddrFromString("10.18.0.3:11111")
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), y)
-	assert.Equal(t, 4, len(info.Remotes))
-
-	// Query and reference remote should get the first one (and not nil)
-	info, _ = m.QueryVpnIP(ip2int(net.ParseIP("10.128.1.1")))
-	assert.NotNil(t, info.remote)
-
-	// Promotion should ensure that the best remote is chosen (y)
-	info.ForcePromoteBest(myNets)
-	assert.True(t, myNet.Contains(udp2ip(info.remote)))
-
-}
-
-func TestHostmapdebug(t *testing.T) {
-	_, myNet, _ := net.ParseCIDR("10.128.0.0/16")
-	_, localToMe, _ := net.ParseCIDR("192.168.1.0/24")
-	preferredRanges := []*net.IPNet{localToMe}
-	m := NewHostMap("test", myNet, preferredRanges)
-
-	a := NewUDPAddrFromString("10.127.0.3:11111")
-	b := NewUDPAddrFromString("1.0.0.1:22222")
-	y := NewUDPAddrFromString("10.128.0.3:11111")
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), a)
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), b)
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), y)
-
-	//t.Errorf("%s", m.DebugRemotes(1))
-}
-
-func TestHostMap_rotateRemote(t *testing.T) {
-	h := HostInfo{}
-	// 0 remotes, no panic
-	h.rotateRemote()
-	assert.Nil(t, h.remote)
-
-	// 1 remote, no panic
-	h.AddRemote(*NewUDPAddr(ip2int(net.IP{1, 1, 1, 1}), 0))
-	h.rotateRemote()
-	assert.Equal(t, udp2ipInt(h.remote), ip2int(net.IP{1, 1, 1, 1}))
-
-	h.AddRemote(*NewUDPAddr(ip2int(net.IP{1, 1, 1, 2}), 0))
-	h.AddRemote(*NewUDPAddr(ip2int(net.IP{1, 1, 1, 3}), 0))
-	h.AddRemote(*NewUDPAddr(ip2int(net.IP{1, 1, 1, 4}), 0))
-
-	// Rotate through those 3
-	h.rotateRemote()
-	assert.Equal(t, udp2ipInt(h.remote), ip2int(net.IP{1, 1, 1, 2}))
-
-	h.rotateRemote()
-	assert.Equal(t, udp2ipInt(h.remote), ip2int(net.IP{1, 1, 1, 3}))
-
-	h.rotateRemote()
-	assert.Equal(t, udp2ipInt(h.remote), ip2int(net.IP{1, 1, 1, 4}))
-
-	// Finally, we should start over
-	h.rotateRemote()
-	assert.Equal(t, udp2ipInt(h.remote), ip2int(net.IP{1, 1, 1, 1}))
-}
-
-func BenchmarkHostmappromote2(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		_, myNet, _ := net.ParseCIDR("10.128.0.0/16")
-		_, localToMe, _ := net.ParseCIDR("192.168.1.0/24")
-		preferredRanges := []*net.IPNet{localToMe}
-		m := NewHostMap("test", myNet, preferredRanges)
-		y := NewUDPAddrFromString("10.128.0.3:11111")
-		a := NewUDPAddrFromString("10.127.0.3:11111")
-		g := NewUDPAddrFromString("1.0.0.1:22222")
-		m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), a)
-		m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), g)
-		m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), y)
-	}
-	b.Errorf("hi")
-
-}

inside.go

@@ -5,12 +5,18 @@ import (
 
 	"github.com/flynn/noise"
 	"github.com/sirupsen/logrus"
+	"github.com/slackhq/nebula/firewall"
+	"github.com/slackhq/nebula/header"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/udp"
 )
 
-func (f *Interface) consumeInsidePacket(packet []byte, fwPacket *FirewallPacket, nb, out []byte) {
+func (f *Interface) consumeInsidePacket(packet []byte, fwPacket *firewall.Packet, nb, out []byte, q int, localCache firewall.ConntrackCache) {
 	err := newPacket(packet, false, fwPacket)
 	if err != nil {
-		l.WithField("packet", packet).Debugf("Error while validating outbound packet: %s", err)
+		if f.l.Level >= logrus.DebugLevel {
+			f.l.WithField("packet", packet).Debugf("Error while validating outbound packet: %s", err)
+		}
 		return
 	}
 
@@ -19,12 +25,35 @@ func (f *Interface) consumeInsidePacket(packet []byte, fwPacket *FirewallPacket,
 		return
 	}
 
+	if fwPacket.RemoteIP == f.myVpnIp {
+		// Immediately forward packets from self to self.
+		// This should only happen on Darwin-based hosts, which routes packets from
+		// the Nebula IP to the Nebula IP through the Nebula TUN device.
+		if immediatelyForwardToSelf {
+			_, err := f.readers[q].Write(packet)
+			if err != nil {
+				f.l.WithError(err).Error("Failed to forward to tun")
+			}
+		}
+		// Otherwise, drop. On linux, we should never see these packets - Linux
+		// routes packets from the nebula IP to the nebula IP through the loopback device.
+		return
+	}
+
 	// Ignore broadcast packets
 	if f.dropMulticast && isMulticast(fwPacket.RemoteIP) {
 		return
 	}
 
 	hostinfo := f.getOrHandshake(fwPacket.RemoteIP)
+	if hostinfo == nil {
+		if f.l.Level >= logrus.DebugLevel {
+			f.l.WithField("vpnIp", fwPacket.RemoteIP).
+				WithField("fwPacket", fwPacket).
+				Debugln("dropping outbound packet, vpnIp not in our CIDR or in unsafe routes")
+		}
+		return
+	}
 	ci := hostinfo.ConnectionState
 
 	if ci.ready == false {
@@ -32,53 +61,60 @@ func (f *Interface) consumeInsidePacket(packet []byte, fwPacket *FirewallPacket,
 		// the packet queue.
 		ci.queueLock.Lock()
 		if !ci.ready {
-			hostinfo.cachePacket(message, 0, packet, f.sendMessageNow)
+			hostinfo.cachePacket(f.l, header.Message, 0, packet, f.sendMessageNow, f.cachedPacketMetrics)
 			ci.queueLock.Unlock()
 			return
 		}
 		ci.queueLock.Unlock()
 	}
 
-	if !f.firewall.Drop(packet, *fwPacket, false, hostinfo, trustedCAs) {
+	dropReason := f.firewall.Drop(packet, *fwPacket, false, hostinfo, f.caPool, localCache)
-		f.send(message, 0, ci, hostinfo, hostinfo.remote, packet, nb, out)
+	if dropReason == nil {
-		if f.lightHouse != nil && *ci.messageCounter%5000 == 0 {
+		f.sendNoMetrics(header.Message, 0, ci, hostinfo, nil, packet, nb, out, q)
-			f.lightHouse.Query(fwPacket.RemoteIP, f)
-		}
 
-	} else if l.Level >= logrus.DebugLevel {
+	} else if f.l.Level >= logrus.DebugLevel {
-		l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("fwPacket", fwPacket).
+		hostinfo.logger(f.l).
+			WithField("fwPacket", fwPacket).
+			WithField("reason", dropReason).
 			Debugln("dropping outbound packet")
 	}
 }
 
-func (f *Interface) getOrHandshake(vpnIp uint32) *HostInfo {
+func (f *Interface) Handshake(vpnIp iputil.VpnIp) {
-	if f.hostMap.vpnCIDR.Contains(int2ip(vpnIp)) == false {
+	f.getOrHandshake(vpnIp)
-		vpnIp = f.hostMap.queryUnsafeRoute(vpnIp)
+}
+
+// getOrHandshake returns nil if the vpnIp is not routable
+func (f *Interface) getOrHandshake(vpnIp iputil.VpnIp) *HostInfo {
+	if !ipMaskContains(f.lightHouse.myVpnIp, f.lightHouse.myVpnZeros, vpnIp) {
+		vpnIp = f.inside.RouteFor(vpnIp)
+		if vpnIp == 0 {
+			return nil
 		}
-	hostinfo, err := f.hostMap.PromoteBestQueryVpnIP(vpnIp, f)
+	}
+	hostinfo, err := f.hostMap.PromoteBestQueryVpnIp(vpnIp, f)
 
 	//if err != nil || hostinfo.ConnectionState == nil {
 	if err != nil {
-		hostinfo, err = f.handshakeManager.pendingHostMap.QueryVpnIP(vpnIp)
+		hostinfo, err = f.handshakeManager.pendingHostMap.QueryVpnIp(vpnIp)
 		if err != nil {
-			hostinfo = f.handshakeManager.AddVpnIP(vpnIp)
+			hostinfo = f.handshakeManager.AddVpnIp(vpnIp, f.initHostInfo)
 		}
 	}
-
 	ci := hostinfo.ConnectionState
 
 	if ci != nil && ci.eKey != nil && ci.ready {
 		return hostinfo
 	}
 
-	if ci == nil {
+	// Handshake is not ready, we need to grab the lock now before we start the handshake process
-		// if we don't have a connection state, then send a handshake initiation
+	hostinfo.Lock()
-		ci = f.newConnectionState(true, noise.HandshakeIX, []byte{}, 0)
+	defer hostinfo.Unlock()
-		// FIXME: Maybe make XX selectable, but probably not since psk makes it nearly pointless for us.
+
-		//ci = f.newConnectionState(true, noise.HandshakeXX, []byte{}, 0)
+	// Double check, now that we have the lock
-		hostinfo.ConnectionState = ci
+	ci = hostinfo.ConnectionState
-	} else if ci.eKey == nil {
+	if ci != nil && ci.eKey != nil && ci.ready {
-		// if we don't have any state at all, create it
+		return hostinfo
 	}
 
 	// If we have already created the handshake packet, we don't want to call the function at all.
@@ -86,41 +122,65 @@ func (f *Interface) getOrHandshake(vpnIp uint32) *HostInfo {
 		ixHandshakeStage0(f, vpnIp, hostinfo)
 		// FIXME: Maybe make XX selectable, but probably not since psk makes it nearly pointless for us.
 		//xx_handshakeStage0(f, ip, hostinfo)
+
+		// If this is a static host, we don't need to wait for the HostQueryReply
+		// We can trigger the handshake right now
+		if _, ok := f.lightHouse.GetStaticHostList()[vpnIp]; ok {
+			select {
+			case f.handshakeManager.trigger <- vpnIp:
+			default:
+			}
+		}
 	}
 
 	return hostinfo
 }
 
-func (f *Interface) sendMessageNow(t NebulaMessageType, st NebulaMessageSubType, hostInfo *HostInfo, p, nb, out []byte) {
+// initHostInfo is the init function to pass to (*HandshakeManager).AddVpnIP that
-	fp := &FirewallPacket{}
+// will create the initial Noise ConnectionState
+func (f *Interface) initHostInfo(hostinfo *HostInfo) {
+	hostinfo.ConnectionState = f.newConnectionState(f.l, true, noise.HandshakeIX, []byte{}, 0)
+}
+
+func (f *Interface) sendMessageNow(t header.MessageType, st header.MessageSubType, hostInfo *HostInfo, p, nb, out []byte) {
+	fp := &firewall.Packet{}
 	err := newPacket(p, false, fp)
 	if err != nil {
-		l.Warnf("error while parsing outgoing packet for firewall check; %v", err)
+		f.l.Warnf("error while parsing outgoing packet for firewall check; %v", err)
 		return
 	}
 
 	// check if packet is in outbound fw rules
-	if f.firewall.Drop(p, *fp, false, hostInfo, trustedCAs) {
+	dropReason := f.firewall.Drop(p, *fp, false, hostInfo, f.caPool, nil)
-		l.WithField("fwPacket", fp).Debugln("dropping cached packet")
+	if dropReason != nil {
+		if f.l.Level >= logrus.DebugLevel {
+			f.l.WithField("fwPacket", fp).
+				WithField("reason", dropReason).
+				Debugln("dropping cached packet")
+		}
 		return
 	}
 
-	f.send(message, st, hostInfo.ConnectionState, hostInfo, hostInfo.remote, p, nb, out)
+	f.sendNoMetrics(header.Message, st, hostInfo.ConnectionState, hostInfo, nil, p, nb, out, 0)
-	if f.lightHouse != nil && *hostInfo.ConnectionState.messageCounter%5000 == 0 {
-		f.lightHouse.Query(fp.RemoteIP, f)
-	}
 }
 
 // SendMessageToVpnIp handles real ip:port lookup and sends to the current best known address for vpnIp
-func (f *Interface) SendMessageToVpnIp(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, nb, out []byte) {
+func (f *Interface) SendMessageToVpnIp(t header.MessageType, st header.MessageSubType, vpnIp iputil.VpnIp, p, nb, out []byte) {
 	hostInfo := f.getOrHandshake(vpnIp)
+	if hostInfo == nil {
+		if f.l.Level >= logrus.DebugLevel {
+			f.l.WithField("vpnIp", vpnIp).
+				Debugln("dropping SendMessageToVpnIp, vpnIp not in our CIDR or in unsafe routes")
+		}
+		return
+	}
 
 	if !hostInfo.ConnectionState.ready {
 		// Because we might be sending stored packets, lock here to stop new things going to
 		// the packet queue.
 		hostInfo.ConnectionState.queueLock.Lock()
 		if !hostInfo.ConnectionState.ready {
-			hostInfo.cachePacket(t, st, p, f.sendMessageToVpnIp)
+			hostInfo.cachePacket(f.l, t, st, p, f.sendMessageToVpnIp, f.cachedPacketMetrics)
 			hostInfo.ConnectionState.queueLock.Unlock()
 			return
 		}
@@ -131,70 +191,162 @@ func (f *Interface) SendMessageToVpnIp(t NebulaMessageType, st NebulaMessageSubT
 	return
 }
 
-func (f *Interface) sendMessageToVpnIp(t NebulaMessageType, st NebulaMessageSubType, hostInfo *HostInfo, p, nb, out []byte) {
+func (f *Interface) sendMessageToVpnIp(t header.MessageType, st header.MessageSubType, hostInfo *HostInfo, p, nb, out []byte) {
-	f.send(t, st, hostInfo.ConnectionState, hostInfo, hostInfo.remote, p, nb, out)
+	f.send(t, st, hostInfo.ConnectionState, hostInfo, p, nb, out)
 }
 
-// SendMessageToAll handles real ip:port lookup and sends to all known addresses for vpnIp
+func (f *Interface) send(t header.MessageType, st header.MessageSubType, ci *ConnectionState, hostinfo *HostInfo, p, nb, out []byte) {
-func (f *Interface) SendMessageToAll(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, nb, out []byte) {
+	f.messageMetrics.Tx(t, st, 1)
-	hostInfo := f.getOrHandshake(vpnIp)
+	f.sendNoMetrics(t, st, ci, hostinfo, nil, p, nb, out, 0)
+}
 
-	if hostInfo.ConnectionState.ready == false {
+func (f *Interface) sendTo(t header.MessageType, st header.MessageSubType, ci *ConnectionState, hostinfo *HostInfo, remote *udp.Addr, p, nb, out []byte) {
-		// Because we might be sending stored packets, lock here to stop new things going to
+	f.messageMetrics.Tx(t, st, 1)
-		// the packet queue.
+	f.sendNoMetrics(t, st, ci, hostinfo, remote, p, nb, out, 0)
-		hostInfo.ConnectionState.queueLock.Lock()
+}
-		if !hostInfo.ConnectionState.ready {
+
-			hostInfo.cachePacket(t, st, p, f.sendMessageToAll)
+// sendVia sends a payload through a Relay tunnel. No authentication or encryption is done
-			hostInfo.ConnectionState.queueLock.Unlock()
+// to the payload for the ultimate target host, making this a useful method for sending
+// handshake messages to peers through relay tunnels.
+// via is the HostInfo through which the message is relayed.
+// ad is the plaintext data to authenticate, but not encrypt
+// nb is a buffer used to store the nonce value, re-used for performance reasons.
+// out is a buffer used to store the result of the Encrypt operation
+// q indicates which writer to use to send the packet.
+func (f *Interface) SendVia(viaIfc interface{},
+	relayIfc interface{},
+	ad,
+	nb,
+	out []byte,
+	nocopy bool,
+) {
+	via := viaIfc.(*HostInfo)
+	relay := relayIfc.(*Relay)
+	c := atomic.AddUint64(&via.ConnectionState.atomicMessageCounter, 1)
+
+	out = header.Encode(out, header.Version, header.Message, header.MessageRelay, relay.RemoteIndex, c)
+	f.connectionManager.Out(via.vpnIp)
+
+	// Authenticate the header and payload, but do not encrypt for this message type.
+	// The payload consists of the inner, unencrypted Nebula header, as well as the end-to-end encrypted payload.
+	if len(out)+len(ad)+via.ConnectionState.eKey.Overhead() > cap(out) {
+		via.logger(f.l).
+			WithField("outCap", cap(out)).
+			WithField("payloadLen", len(ad)).
+			WithField("headerLen", len(out)).
+			WithField("cipherOverhead", via.ConnectionState.eKey.Overhead()).
+			Error("SendVia out buffer not large enough for relay")
 		return
 	}
-		hostInfo.ConnectionState.queueLock.Unlock()
+
+	// The header bytes are written to the 'out' slice; Grow the slice to hold the header and associated data payload.
+	offset := len(out)
+	out = out[:offset+len(ad)]
+
+	// In one call path, the associated data _is_ already stored in out. In other call paths, the associated data must
+	// be copied into 'out'.
+	if !nocopy {
+		copy(out[offset:], ad)
 	}
 
-	f.sendMessageToAll(t, st, hostInfo, p, nb, out)
+	var err error
+	out, err = via.ConnectionState.eKey.EncryptDanger(out, out, nil, c, nb)
+	if err != nil {
+		via.logger(f.l).WithError(err).Info("Failed to EncryptDanger in sendVia")
 		return
-}
+	}
-
+	err = f.writers[0].WriteTo(out, via.remote)
-func (f *Interface) sendMessageToAll(t NebulaMessageType, st NebulaMessageSubType, hostInfo *HostInfo, p, nb, b []byte) {
+	if err != nil {
-	for _, r := range hostInfo.RemoteUDPAddrs() {
+		via.logger(f.l).WithError(err).Info("Failed to WriteTo in sendVia")
-		f.send(t, st, hostInfo.ConnectionState, hostInfo, r, p, nb, b)
 	}
 }
 
-func (f *Interface) send(t NebulaMessageType, st NebulaMessageSubType, ci *ConnectionState, hostinfo *HostInfo, remote *udpAddr, p, nb, out []byte) {
+func (f *Interface) sendNoMetrics(t header.MessageType, st header.MessageSubType, ci *ConnectionState, hostinfo *HostInfo, remote *udp.Addr, p, nb, out []byte, q int) {
 	if ci.eKey == nil {
 		//TODO: log warning
 		return
 	}
+	useRelay := remote == nil && hostinfo.remote == nil
+	fullOut := out
+
+	if useRelay {
+		if len(out) < header.Len {
+			// out always has a capacity of mtu, but not always a length greater than the header.Len.
+			// Grow it to make sure the next operation works.
+			out = out[:header.Len]
+		}
+		// Save a header's worth of data at the front of the 'out' buffer.
+		out = out[header.Len:]
+	}
 
-	var err error
 	//TODO: enable if we do more than 1 tun queue
 	//ci.writeLock.Lock()
-	c := atomic.AddUint64(ci.messageCounter, 1)
+	c := atomic.AddUint64(&ci.atomicMessageCounter, 1)
 
 	//l.WithField("trace", string(debug.Stack())).Error("out Header ", &Header{Version, t, st, 0, hostinfo.remoteIndexId, c}, p)
-	out = HeaderEncode(out, Version, uint8(t), uint8(st), hostinfo.remoteIndexId, c)
+	out = header.Encode(out, header.Version, t, st, hostinfo.remoteIndexId, c)
-	f.connectionManager.Out(hostinfo.hostId)
+	f.connectionManager.Out(hostinfo.vpnIp)
 
+	// Query our LH if we haven't since the last time we've been rebound, this will cause the remote to punch against
+	// all our IPs and enable a faster roaming.
+	if t != header.CloseTunnel && hostinfo.lastRebindCount != f.rebindCount {
+		//NOTE: there is an update hole if a tunnel isn't used and exactly 256 rebinds occur before the tunnel is
+		// finally used again. This tunnel would eventually be torn down and recreated if this action didn't help.
+		f.lightHouse.QueryServer(hostinfo.vpnIp, f)
+		hostinfo.lastRebindCount = f.rebindCount
+		if f.l.Level >= logrus.DebugLevel {
+			f.l.WithField("vpnIp", hostinfo.vpnIp).Debug("Lighthouse update triggered for punch due to rebind counter")
+		}
+	}
+
+	var err error
 	out, err = ci.eKey.EncryptDanger(out, out, p, c, nb)
 	//TODO: see above note on lock
 	//ci.writeLock.Unlock()
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).
+		hostinfo.logger(f.l).WithError(err).
 			WithField("udpAddr", remote).WithField("counter", c).
-			WithField("attemptedCounter", ci.messageCounter).
+			WithField("attemptedCounter", c).
 			Error("Failed to encrypt outgoing packet")
 		return
 	}
 
-	err = f.outside.WriteTo(out, remote)
+	if remote != nil {
+		err = f.writers[q].WriteTo(out, remote)
 		if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).
+			hostinfo.logger(f.l).WithError(err).
 				WithField("udpAddr", remote).Error("Failed to write outgoing packet")
 		}
+	} else if hostinfo.remote != nil {
+		err = f.writers[q].WriteTo(out, hostinfo.remote)
+		if err != nil {
+			hostinfo.logger(f.l).WithError(err).
+				WithField("udpAddr", remote).Error("Failed to write outgoing packet")
+		}
+	} else {
+		// Try to send via a relay
+		for _, relayIP := range hostinfo.relayState.CopyRelayIps() {
+			relayHostInfo, err := f.hostMap.QueryVpnIp(relayIP)
+			if err != nil {
+				hostinfo.logger(f.l).WithField("relayIp", relayIP).WithError(err).Info("sendNoMetrics failed to find HostInfo")
+				continue
+			}
+			relay, ok := relayHostInfo.relayState.QueryRelayForByIp(hostinfo.vpnIp)
+			if !ok {
+				hostinfo.logger(f.l).
+					WithField("relayIp", relayHostInfo.vpnIp).
+					WithField("relayTarget", hostinfo.vpnIp).
+					Info("sendNoMetrics relay missing object for target")
+				continue
+			}
+			f.SendVia(relayHostInfo, relay, out, nb, fullOut[:header.Len+len(out)], true)
+			break
+		}
+	}
+	return
 }
 
-func isMulticast(ip uint32) bool {
+func isMulticast(ip iputil.VpnIp) bool {
 	// Class D multicast
 	if (((ip >> 24) & 0xff) & 0xf0) == 0xe0 {
 		return true

inside_darwin.go

@@ -0,0 +1,3 @@
+package nebula
+
+const immediatelyForwardToSelf bool = true

inside_generic.go

@@ -0,0 +1,6 @@
+//go:build !darwin
+// +build !darwin
+
+package nebula
+
+const immediatelyForwardToSelf bool = false

interface.go

@@ -1,19 +1,32 @@
 package nebula
 
 import (
+	"context"
 	"errors"
+	"fmt"
+	"io"
+	"net"
 	"os"
+	"runtime"
+	"sync/atomic"
 	"time"
 
 	"github.com/rcrowley/go-metrics"
+	"github.com/sirupsen/logrus"
+	"github.com/slackhq/nebula/cert"
+	"github.com/slackhq/nebula/config"
+	"github.com/slackhq/nebula/firewall"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/overlay"
+	"github.com/slackhq/nebula/udp"
 )
 
 const mtu = 9001
 
 type InterfaceConfig struct {
 	HostMap                 *HostMap
-	Outside                 *udpConn
+	Outside                 *udp.Conn
-	Inside                  *Tun
+	Inside                  overlay.Device
 	certState               *CertState
 	Cipher                  string
 	Firewall                *Firewall
@@ -24,13 +37,21 @@ type InterfaceConfig struct {
 	pendingDeletionInterval int
 	DropLocalBroadcast      bool
 	DropMulticast           bool
-	UDPBatchSize            int
+	routines                int
+	MessageMetrics          *MessageMetrics
+	version                 string
+	caPool                  *cert.NebulaCAPool
+	disconnectInvalid       bool
+	relayManager            *relayManager
+
+	ConntrackCacheTimeout time.Duration
+	l                     *logrus.Logger
 }
 
 type Interface struct {
 	hostMap            *HostMap
-	outside            *udpConn
+	outside            *udp.Conn
-	inside             *Tun
+	inside             overlay.Device
 	certState          *CertState
 	cipher             string
 	firewall           *Firewall
@@ -39,18 +60,69 @@ type Interface struct {
 	serveDns           bool
 	createTime         time.Time
 	lightHouse         *LightHouse
-	localBroadcast     uint32
+	localBroadcast     iputil.VpnIp
+	myVpnIp            iputil.VpnIp
 	dropLocalBroadcast bool
 	dropMulticast      bool
-	udpBatchSize       int
+	routines           int
+	caPool             *cert.NebulaCAPool
+	disconnectInvalid  bool
+	closed             int32
+	relayManager       *relayManager
+
+	sendRecvErrorConfig sendRecvErrorConfig
+
+	// rebindCount is used to decide if an active tunnel should trigger a punch notification through a lighthouse
+	rebindCount int8
 	version     string
 
-	metricRxRecvError metrics.Counter
+	conntrackCacheTimeout time.Duration
-	metricTxRecvError metrics.Counter
+
+	writers []*udp.Conn
+	readers []io.ReadWriteCloser
+
 	metricHandshakes    metrics.Histogram
+	messageMetrics      *MessageMetrics
+	cachedPacketMetrics *cachedPacketMetrics
+
+	l *logrus.Logger
 }
 
-func NewInterface(c *InterfaceConfig) (*Interface, error) {
+type sendRecvErrorConfig uint8
+
+const (
+	sendRecvErrorAlways sendRecvErrorConfig = iota
+	sendRecvErrorNever
+	sendRecvErrorPrivate
+)
+
+func (s sendRecvErrorConfig) ShouldSendRecvError(ip net.IP) bool {
+	switch s {
+	case sendRecvErrorPrivate:
+		return ip.IsPrivate()
+	case sendRecvErrorAlways:
+		return true
+	case sendRecvErrorNever:
+		return false
+	default:
+		panic(fmt.Errorf("invalid sendRecvErrorConfig value: %d", s))
+	}
+}
+
+func (s sendRecvErrorConfig) String() string {
+	switch s {
+	case sendRecvErrorAlways:
+		return "always"
+	case sendRecvErrorNever:
+		return "never"
+	case sendRecvErrorPrivate:
+		return "private"
+	default:
+		return fmt.Sprintf("invalid(%d)", s)
+	}
+}
+
+func NewInterface(ctx context.Context, c *InterfaceConfig) (*Interface, error) {
 	if c.Outside == nil {
 		return nil, errors.New("no outside connection")
 	}
@@ -64,6 +136,7 @@ func NewInterface(c *InterfaceConfig) (*Interface, error) {
 		return nil, errors.New("no firewall rules")
 	}
 
+	myVpnIp := iputil.Ip2VpnIp(c.certState.certificate.Details.Ips[0].IP)
 	ifce := &Interface{
 		hostMap:            c.HostMap,
 		outside:            c.Outside,
@@ -75,107 +148,152 @@ func NewInterface(c *InterfaceConfig) (*Interface, error) {
 		handshakeManager:   c.HandshakeManager,
 		createTime:         time.Now(),
 		lightHouse:         c.lightHouse,
-		localBroadcast:     ip2int(c.certState.certificate.Details.Ips[0].IP) | ^ip2int(c.certState.certificate.Details.Ips[0].Mask),
+		localBroadcast:     myVpnIp | ^iputil.Ip2VpnIp(c.certState.certificate.Details.Ips[0].Mask),
 		dropLocalBroadcast: c.DropLocalBroadcast,
 		dropMulticast:      c.DropMulticast,
-		udpBatchSize:       c.UDPBatchSize,
+		routines:           c.routines,
+		version:            c.version,
+		writers:            make([]*udp.Conn, c.routines),
+		readers:            make([]io.ReadWriteCloser, c.routines),
+		caPool:             c.caPool,
+		disconnectInvalid:  c.disconnectInvalid,
+		myVpnIp:            myVpnIp,
+		relayManager:       c.relayManager,
+
+		conntrackCacheTimeout: c.ConntrackCacheTimeout,
 
-		metricRxRecvError: metrics.GetOrRegisterCounter("messages.rx.recv_error", nil),
-		metricTxRecvError: metrics.GetOrRegisterCounter("messages.tx.recv_error", nil),
 		metricHandshakes: metrics.GetOrRegisterHistogram("handshakes", nil, metrics.NewExpDecaySample(1028, 0.015)),
+		messageMetrics:   c.MessageMetrics,
+		cachedPacketMetrics: &cachedPacketMetrics{
+			sent:    metrics.GetOrRegisterCounter("hostinfo.cached_packets.sent", nil),
+			dropped: metrics.GetOrRegisterCounter("hostinfo.cached_packets.dropped", nil),
+		},
+
+		l: c.l,
 	}
 
-	ifce.connectionManager = newConnectionManager(ifce, c.checkInterval, c.pendingDeletionInterval)
+	ifce.connectionManager = newConnectionManager(ctx, c.l, ifce, c.checkInterval, c.pendingDeletionInterval)
 
 	return ifce, nil
 }
 
-func (f *Interface) Run(tunRoutines, udpRoutines int, buildVersion string) {
+// activate creates the interface on the host. After the interface is created, any
+// other services that want to bind listeners to its IP may do so successfully. However,
+// the interface isn't going to process anything until run() is called.
+func (f *Interface) activate() {
 	// actually turn on tun dev
-	if err := f.inside.Activate(); err != nil {
+
-		l.Fatal(err)
+	addr, err := f.outside.LocalAddr()
+	if err != nil {
+		f.l.WithError(err).Error("Failed to get udp listen address")
 	}
 
-	f.version = buildVersion
+	f.l.WithField("interface", f.inside.Name()).WithField("network", f.inside.Cidr().String()).
-	l.WithField("interface", f.inside.Device).WithField("network", f.inside.Cidr.String()).
+		WithField("build", f.version).WithField("udpAddr", addr).
-		WithField("build", buildVersion).
 		Info("Nebula interface is active")
 
+	metrics.GetOrRegisterGauge("routines", nil).Update(int64(f.routines))
+
+	// Prepare n tun queues
+	var reader io.ReadWriteCloser = f.inside
+	for i := 0; i < f.routines; i++ {
+		if i > 0 {
+			reader, err = f.inside.NewMultiQueueReader()
+			if err != nil {
+				f.l.Fatal(err)
+			}
+		}
+		f.readers[i] = reader
+	}
+
+	if err := f.inside.Activate(); err != nil {
+		f.inside.Close()
+		f.l.Fatal(err)
+	}
+}
+
+func (f *Interface) run() {
 	// Launch n queues to read packets from udp
-	for i := 0; i < udpRoutines; i++ {
+	for i := 0; i < f.routines; i++ {
 		go f.listenOut(i)
 	}
 
 	// Launch n queues to read packets from tun dev
-	for i := 0; i < tunRoutines; i++ {
+	for i := 0; i < f.routines; i++ {
-		go f.listenIn(i)
+		go f.listenIn(f.readers[i], i)
 	}
 }
 
 func (f *Interface) listenOut(i int) {
-	//TODO: handle error
+	runtime.LockOSThread()
-	addr, err := f.outside.LocalAddr()
-	if err != nil {
-		l.WithError(err).Error("failed to discover udp listening address")
-	}
 
-	var li *udpConn
+	var li *udp.Conn
+	// TODO clean this up with a coherent interface for each outside connection
 	if i > 0 {
-		//TODO: handle error
+		li = f.writers[i]
-		li, err = NewListener(udp2ip(addr).String(), int(addr.Port), i > 0)
-		if err != nil {
-			l.WithError(err).Error("failed to make a new udp listener")
-		}
 	} else {
 		li = f.outside
 	}
 
-	li.ListenOut(f)
+	lhh := f.lightHouse.NewRequestHandler()
+	conntrackCache := firewall.NewConntrackCacheTicker(f.conntrackCacheTimeout)
+	li.ListenOut(f.readOutsidePackets, lhh.HandleRequest, conntrackCache, i)
 }
 
-func (f *Interface) listenIn(i int) {
+func (f *Interface) listenIn(reader io.ReadWriteCloser, i int) {
+	runtime.LockOSThread()
+
 	packet := make([]byte, mtu)
 	out := make([]byte, mtu)
-	fwPacket := &FirewallPacket{}
+	fwPacket := &firewall.Packet{}
 	nb := make([]byte, 12, 12)
 
+	conntrackCache := firewall.NewConntrackCacheTicker(f.conntrackCacheTimeout)
+
 	for {
-		n, err := f.inside.Read(packet)
+		n, err := reader.Read(packet)
 		if err != nil {
-			l.WithError(err).Error("Error while reading outbound packet")
+			if errors.Is(err, os.ErrClosed) && atomic.LoadInt32(&f.closed) != 0 {
+				return
+			}
+
+			f.l.WithError(err).Error("Error while reading outbound packet")
 			// This only seems to happen when something fatal happens to the fd, so exit.
 			os.Exit(2)
 		}
 
-		f.consumeInsidePacket(packet[:n], fwPacket, nb, out)
+		f.consumeInsidePacket(packet[:n], fwPacket, nb, out, i, conntrackCache.Get(f.l))
 	}
 }
 
-func (f *Interface) RegisterConfigChangeCallbacks(c *Config) {
+func (f *Interface) RegisterConfigChangeCallbacks(c *config.C) {
 	c.RegisterReloadCallback(f.reloadCA)
 	c.RegisterReloadCallback(f.reloadCertKey)
 	c.RegisterReloadCallback(f.reloadFirewall)
-	c.RegisterReloadCallback(f.outside.reloadConfig)
+	c.RegisterReloadCallback(f.reloadSendRecvError)
+	for _, udpConn := range f.writers {
+		c.RegisterReloadCallback(udpConn.ReloadConfig)
+	}
 }
 
-func (f *Interface) reloadCA(c *Config) {
+func (f *Interface) reloadCA(c *config.C) {
 	// reload and check regardless
 	// todo: need mutex?
-	newCAs, err := loadCAFromConfig(c)
+	newCAs, err := loadCAFromConfig(f.l, c)
 	if err != nil {
-		l.WithError(err).Error("Could not refresh trusted CA certificates")
+		f.l.WithError(err).Error("Could not refresh trusted CA certificates")
 		return
 	}
 
-	trustedCAs = newCAs
+	f.caPool = newCAs
-	l.WithField("fingerprints", trustedCAs.GetFingerprints()).Info("Trusted CA certificates refreshed")
+	f.l.WithField("fingerprints", f.caPool.GetFingerprints()).Info("Trusted CA certificates refreshed")
 }
 
-func (f *Interface) reloadCertKey(c *Config) {
+func (f *Interface) reloadCertKey(c *config.C) {
 	// reload and check in all cases
 	cs, err := NewCertStateFromConfig(c)
 	if err != nil {
-		l.WithError(err).Error("Could not refresh client cert")
+		f.l.WithError(err).Error("Could not refresh client cert")
 		return
 	}
 
@@ -183,40 +301,98 @@ func (f *Interface) reloadCertKey(c *Config) {
 	oldIPs := f.certState.certificate.Details.Ips
 	newIPs := cs.certificate.Details.Ips
 	if len(oldIPs) > 0 && len(newIPs) > 0 && oldIPs[0].String() != newIPs[0].String() {
-		l.WithField("new_ip", newIPs[0]).WithField("old_ip", oldIPs[0]).Error("IP in new cert was different from old")
+		f.l.WithField("new_ip", newIPs[0]).WithField("old_ip", oldIPs[0]).Error("IP in new cert was different from old")
 		return
 	}
 
 	f.certState = cs
-	l.WithField("cert", cs.certificate).Info("Client cert refreshed from disk")
+	f.l.WithField("cert", cs.certificate).Info("Client cert refreshed from disk")
 }
 
-func (f *Interface) reloadFirewall(c *Config) {
+func (f *Interface) reloadFirewall(c *config.C) {
 	//TODO: need to trigger/detect if the certificate changed too
 	if c.HasChanged("firewall") == false {
-		l.Debug("No firewall config change detected")
+		f.l.Debug("No firewall config change detected")
 		return
 	}
 
-	fw, err := NewFirewallFromConfig(f.certState.certificate, c)
+	fw, err := NewFirewallFromConfig(f.l, f.certState.certificate, c)
 	if err != nil {
-		l.WithError(err).Error("Error while creating firewall during reload")
+		f.l.WithError(err).Error("Error while creating firewall during reload")
 		return
 	}
 
 	oldFw := f.firewall
+	conntrack := oldFw.Conntrack
+	conntrack.Lock()
+	defer conntrack.Unlock()
+
+	fw.rulesVersion = oldFw.rulesVersion + 1
+	// If rulesVersion is back to zero, we have wrapped all the way around. Be
+	// safe and just reset conntrack in this case.
+	if fw.rulesVersion == 0 {
+		f.l.WithField("firewallHash", fw.GetRuleHash()).
+			WithField("oldFirewallHash", oldFw.GetRuleHash()).
+			WithField("rulesVersion", fw.rulesVersion).
+			Warn("firewall rulesVersion has overflowed, resetting conntrack")
+	} else {
+		fw.Conntrack = conntrack
+	}
+
 	f.firewall = fw
 
 	oldFw.Destroy()
-	l.WithField("firewallHash", fw.GetRuleHash()).
+	f.l.WithField("firewallHash", fw.GetRuleHash()).
 		WithField("oldFirewallHash", oldFw.GetRuleHash()).
+		WithField("rulesVersion", fw.rulesVersion).
 		Info("New firewall has been installed")
 }
 
-func (f *Interface) emitStats(i time.Duration) {
+func (f *Interface) reloadSendRecvError(c *config.C) {
-	ticker := time.NewTicker(i)
+	if c.InitialLoad() || c.HasChanged("listen.send_recv_error") {
-	for range ticker.C {
+		stringValue := c.GetString("listen.send_recv_error", "always")
-		f.firewall.EmitStats()
+
-		f.handshakeManager.EmitStats()
+		switch stringValue {
+		case "always":
+			f.sendRecvErrorConfig = sendRecvErrorAlways
+		case "never":
+			f.sendRecvErrorConfig = sendRecvErrorNever
+		case "private":
+			f.sendRecvErrorConfig = sendRecvErrorPrivate
+		default:
+			if c.GetBool("listen.send_recv_error", true) {
+				f.sendRecvErrorConfig = sendRecvErrorAlways
+			} else {
+				f.sendRecvErrorConfig = sendRecvErrorNever
+			}
+		}
+
+		f.l.WithField("sendRecvError", f.sendRecvErrorConfig.String()).
+			Info("Loaded send_recv_error config")
 	}
 }
+
+func (f *Interface) emitStats(ctx context.Context, i time.Duration) {
+	ticker := time.NewTicker(i)
+	defer ticker.Stop()
+
+	udpStats := udp.NewUDPStatsEmitter(f.writers)
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-ticker.C:
+			f.firewall.EmitStats()
+			f.handshakeManager.EmitStats()
+			udpStats()
+		}
+	}
+}
+
+func (f *Interface) Close() error {
+	atomic.StoreInt32(&f.closed, 1)
+
+	// Release the tun device
+	return f.inside.Close()
+}

iputil/util.go

@@ -0,0 +1,93 @@
+package iputil
+
+import (
+	"encoding/binary"
+	"fmt"
+	"net"
+	"net/netip"
+)
+
+type VpnIp uint32
+
+const maxIPv4StringLen = len("255.255.255.255")
+
+func (ip VpnIp) String() string {
+	b := make([]byte, maxIPv4StringLen)
+
+	n := ubtoa(b, 0, byte(ip>>24))
+	b[n] = '.'
+	n++
+
+	n += ubtoa(b, n, byte(ip>>16&255))
+	b[n] = '.'
+	n++
+
+	n += ubtoa(b, n, byte(ip>>8&255))
+	b[n] = '.'
+	n++
+
+	n += ubtoa(b, n, byte(ip&255))
+	return string(b[:n])
+}
+
+func (ip VpnIp) MarshalJSON() ([]byte, error) {
+	return []byte(fmt.Sprintf("\"%s\"", ip.String())), nil
+}
+
+func (ip VpnIp) ToIP() net.IP {
+	nip := make(net.IP, 4)
+	binary.BigEndian.PutUint32(nip, uint32(ip))
+	return nip
+}
+
+func (ip VpnIp) ToNetIpAddr() netip.Addr {
+	var nip [4]byte
+	binary.BigEndian.PutUint32(nip[:], uint32(ip))
+	return netip.AddrFrom4(nip)
+}
+
+func Ip2VpnIp(ip []byte) VpnIp {
+	if len(ip) == 16 {
+		return VpnIp(binary.BigEndian.Uint32(ip[12:16]))
+	}
+	return VpnIp(binary.BigEndian.Uint32(ip))
+}
+
+func ToNetIpAddr(ip net.IP) (netip.Addr, error) {
+	addr, ok := netip.AddrFromSlice(ip)
+	if !ok {
+		return netip.Addr{}, fmt.Errorf("invalid net.IP: %v", ip)
+	}
+	return addr, nil
+}
+
+func ToNetIpPrefix(ipNet net.IPNet) (netip.Prefix, error) {
+	addr, err := ToNetIpAddr(ipNet.IP)
+	if err != nil {
+		return netip.Prefix{}, err
+	}
+	ones, bits := ipNet.Mask.Size()
+	if ones == 0 && bits == 0 {
+		return netip.Prefix{}, fmt.Errorf("invalid net.IP: %v", ipNet)
+	}
+	return netip.PrefixFrom(addr, ones), nil
+}
+
+// ubtoa encodes the string form of the integer v to dst[start:] and
+// returns the number of bytes written to dst. The caller must ensure
+// that dst has sufficient length.
+func ubtoa(dst []byte, start int, v byte) int {
+	if v < 10 {
+		dst[start] = v + '0'
+		return 1
+	} else if v < 100 {
+		dst[start+1] = v%10 + '0'
+		dst[start] = v/10 + '0'
+		return 2
+	}
+
+	dst[start+2] = v%10 + '0'
+	dst[start+1] = (v/10)%10 + '0'
+	dst[start] = v/100 + '0'
+	return 3
+}

iputil/util_test.go

@@ -0,0 +1,17 @@
+package iputil
+
+import (
+	"net"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestVpnIp_String(t *testing.T) {
+	assert.Equal(t, "255.255.255.255", Ip2VpnIp(net.ParseIP("255.255.255.255")).String())
+	assert.Equal(t, "1.255.255.255", Ip2VpnIp(net.ParseIP("1.255.255.255")).String())
+	assert.Equal(t, "1.1.255.255", Ip2VpnIp(net.ParseIP("1.1.255.255")).String())
+	assert.Equal(t, "1.1.1.255", Ip2VpnIp(net.ParseIP("1.1.1.255")).String())
+	assert.Equal(t, "1.1.1.1", Ip2VpnIp(net.ParseIP("1.1.1.1")).String())
+	assert.Equal(t, "0.0.0.0", Ip2VpnIp(net.ParseIP("0.0.0.0")).String())
+}

lighthouse_test.go

@@ -1,16 +1,32 @@
 package nebula
 
 import (
+	"fmt"
 	"net"
 	"testing"
 
-	proto "github.com/golang/protobuf/proto"
+	"github.com/slackhq/nebula/config"
+	"github.com/slackhq/nebula/header"
+	"github.com/slackhq/nebula/iputil"
+	"github.com/slackhq/nebula/test"
+	"github.com/slackhq/nebula/udp"
 	"github.com/stretchr/testify/assert"
 )
 
+//TODO: Add a test to ensure udpAddr is copied and not reused
+
+func TestOldIPv4Only(t *testing.T) {
+	// This test ensures our new ipv6 enabled LH protobuf IpAndPorts works with the old style to enable backwards compatibility
+	b := []byte{8, 129, 130, 132, 80, 16, 10}
+	var m Ip4AndPort
+	err := m.Unmarshal(b)
+	assert.NoError(t, err)
+	assert.Equal(t, "10.1.1.1", iputil.VpnIp(m.GetIp()).String())
+}
+
 func TestNewLhQuery(t *testing.T) {
 	myIp := net.ParseIP("192.1.1.1")
-	myIpint := ip2int(myIp)
+	myIpint := iputil.Ip2VpnIp(myIp)
 
 	// Generating a new lh query should work
 	a := NewLhQueryByInt(myIpint)
@@ -19,80 +35,395 @@ func TestNewLhQuery(t *testing.T) {
 	assert.IsType(t, &NebulaMeta{}, a)
 
 	// It should also Marshal fine
-	b, err := proto.Marshal(a)
+	b, err := a.Marshal()
 	assert.Nil(t, err)
 
 	// and then Unmarshal fine
 	n := &NebulaMeta{}
-	err = proto.Unmarshal(b, n)
+	err = n.Unmarshal(b)
 	assert.Nil(t, err)
 
 }
 
-func TestNewipandportfromudpaddr(t *testing.T) {
-	blah := NewUDPAddrFromString("1.2.2.3:12345")
-	meh := NewIpAndPortFromUDPAddr(*blah)
-	assert.Equal(t, uint32(16908803), meh.Ip)
-	assert.Equal(t, uint32(12345), meh.Port)
-}
-
-func TestNewipandportsfromudpaddrs(t *testing.T) {
-	blah := NewUDPAddrFromString("1.2.2.3:12345")
-	blah2 := NewUDPAddrFromString("9.9.9.9:47828")
-	group := []udpAddr{*blah, *blah2}
-	hah := NewIpAndPortsFromNetIps(group)
-	assert.IsType(t, &[]*IpAndPort{}, hah)
-	//t.Error(reflect.TypeOf(hah))
-
-}
-
 func Test_lhStaticMapping(t *testing.T) {
+	l := test.NewLogger()
+	_, myVpnNet, _ := net.ParseCIDR("10.128.0.1/16")
 	lh1 := "10.128.0.2"
-	lh1IP := net.ParseIP(lh1)
 
-	udpServer, _ := NewListener("0.0.0.0", 0, true)
+	c := config.NewC(l)
-
+	c.Settings["lighthouse"] = map[interface{}]interface{}{"hosts": []interface{}{lh1}}
-	meh := NewLightHouse(true, 1, []uint32{ip2int(lh1IP)}, 10, 10003, udpServer, false)
+	c.Settings["static_host_map"] = map[interface{}]interface{}{lh1: []interface{}{"1.1.1.1:4242"}}
-	meh.AddRemote(ip2int(lh1IP), NewUDPAddr(ip2int(lh1IP), uint16(4242)), true)
+	_, err := NewLightHouseFromConfig(l, c, myVpnNet, nil, nil)
-	err := meh.ValidateLHStaticEntries()
 	assert.Nil(t, err)
 
 	lh2 := "10.128.0.3"
-	lh2IP := net.ParseIP(lh2)
+	c = config.NewC(l)
-
+	c.Settings["lighthouse"] = map[interface{}]interface{}{"hosts": []interface{}{lh1, lh2}}
-	meh = NewLightHouse(true, 1, []uint32{ip2int(lh1IP), ip2int(lh2IP)}, 10, 10003, udpServer, false)
+	c.Settings["static_host_map"] = map[interface{}]interface{}{lh1: []interface{}{"100.1.1.1:4242"}}
-	meh.AddRemote(ip2int(lh1IP), NewUDPAddr(ip2int(lh1IP), uint16(4242)), true)
+	_, err = NewLightHouseFromConfig(l, c, myVpnNet, nil, nil)
-	err = meh.ValidateLHStaticEntries()
+	assert.EqualError(t, err, "lighthouse 10.128.0.3 does not have a static_host_map entry")
-	assert.EqualError(t, err, "Lighthouse 10.128.0.3 does not have a static_host_map entry")
 }
 
-//func NewLightHouse(amLighthouse bool, myIp uint32, ips []string, interval int, nebulaPort int, pc *udpConn, punchBack bool) *LightHouse {
+func BenchmarkLighthouseHandleRequest(b *testing.B) {
+	l := test.NewLogger()
+	_, myVpnNet, _ := net.ParseCIDR("10.128.0.1/0")
 
-/*
+	c := config.NewC(l)
-func TestLHQuery(t *testing.T) {
+	lh, err := NewLightHouseFromConfig(l, c, myVpnNet, nil, nil)
-	//n := NewLhQueryByIpString("10.128.0.3")
+	if !assert.NoError(b, err) {
-	_, myNet, _ := net.ParseCIDR("10.128.0.0/16")
+		b.Fatal()
-	m := NewHostMap(myNet)
-	y, _ := net.ResolveUDPAddr("udp", "10.128.0.3:11111")
-	m.Add(ip2int(net.ParseIP("127.0.0.1")), y)
-	//t.Errorf("%s", m)
-	_ = m
-
-	_, n, _ := net.ParseCIDR("127.0.0.1/8")
-
-	/*udpServer, err := net.ListenUDP("udp", &net.UDPAddr{Port: 10009})
-	if err != nil {
-		t.Errorf("%s", err)
 	}
 
-	meh := NewLightHouse(n, m, []string{"10.128.0.2"}, false, 10, 10003, 10004)
+	hAddr := udp.NewAddrFromString("4.5.6.7:12345")
-	//t.Error(m.Hosts)
+	hAddr2 := udp.NewAddrFromString("4.5.6.7:12346")
-	meh2, err := meh.Query(ip2int(net.ParseIP("10.128.0.3")))
+	lh.addrMap[3] = NewRemoteList()
-	t.Error(err)
+	lh.addrMap[3].unlockedSetV4(
+		3,
+		3,
+		[]*Ip4AndPort{
+			NewIp4AndPort(hAddr.IP, uint32(hAddr.Port)),
+			NewIp4AndPort(hAddr2.IP, uint32(hAddr2.Port)),
+		},
+		func(iputil.VpnIp, *Ip4AndPort) bool { return true },
+	)
+
+	rAddr := udp.NewAddrFromString("1.2.2.3:12345")
+	rAddr2 := udp.NewAddrFromString("1.2.2.3:12346")
+	lh.addrMap[2] = NewRemoteList()
+	lh.addrMap[2].unlockedSetV4(
+		3,
+		3,
+		[]*Ip4AndPort{
+			NewIp4AndPort(rAddr.IP, uint32(rAddr.Port)),
+			NewIp4AndPort(rAddr2.IP, uint32(rAddr2.Port)),
+		},
+		func(iputil.VpnIp, *Ip4AndPort) bool { return true },
+	)
+
+	mw := &mockEncWriter{}
+
+	b.Run("notfound", func(b *testing.B) {
+		lhh := lh.NewRequestHandler()
+		req := &NebulaMeta{
+			Type: NebulaMeta_HostQuery,
+			Details: &NebulaMetaDetails{
+				VpnIp:       4,
+				Ip4AndPorts: nil,
+			},
+		}
+		p, err := req.Marshal()
+		assert.NoError(b, err)
+		for n := 0; n < b.N; n++ {
+			lhh.HandleRequest(rAddr, 2, p, mw)
+		}
+	})
+	b.Run("found", func(b *testing.B) {
+		lhh := lh.NewRequestHandler()
+		req := &NebulaMeta{
+			Type: NebulaMeta_HostQuery,
+			Details: &NebulaMetaDetails{
+				VpnIp:       3,
+				Ip4AndPorts: nil,
+			},
+		}
+		p, err := req.Marshal()
+		assert.NoError(b, err)
+
+		for n := 0; n < b.N; n++ {
+			lhh.HandleRequest(rAddr, 2, p, mw)
+		}
+	})
+}
+
+func TestLighthouse_Memory(t *testing.T) {
+	l := test.NewLogger()
+
+	myUdpAddr0 := &udp.Addr{IP: net.ParseIP("10.0.0.2"), Port: 4242}
+	myUdpAddr1 := &udp.Addr{IP: net.ParseIP("192.168.0.2"), Port: 4242}
+	myUdpAddr2 := &udp.Addr{IP: net.ParseIP("172.16.0.2"), Port: 4242}
+	myUdpAddr3 := &udp.Addr{IP: net.ParseIP("100.152.0.2"), Port: 4242}
+	myUdpAddr4 := &udp.Addr{IP: net.ParseIP("24.15.0.2"), Port: 4242}
+	myUdpAddr5 := &udp.Addr{IP: net.ParseIP("192.168.0.2"), Port: 4243}
+	myUdpAddr6 := &udp.Addr{IP: net.ParseIP("192.168.0.2"), Port: 4244}
+	myUdpAddr7 := &udp.Addr{IP: net.ParseIP("192.168.0.2"), Port: 4245}
+	myUdpAddr8 := &udp.Addr{IP: net.ParseIP("192.168.0.2"), Port: 4246}
+	myUdpAddr9 := &udp.Addr{IP: net.ParseIP("192.168.0.2"), Port: 4247}
+	myUdpAddr10 := &udp.Addr{IP: net.ParseIP("192.168.0.2"), Port: 4248}
+	myUdpAddr11 := &udp.Addr{IP: net.ParseIP("192.168.0.2"), Port: 4249}
+	myVpnIp := iputil.Ip2VpnIp(net.ParseIP("10.128.0.2"))
+
+	theirUdpAddr0 := &udp.Addr{IP: net.ParseIP("10.0.0.3"), Port: 4242}
+	theirUdpAddr1 := &udp.Addr{IP: net.ParseIP("192.168.0.3"), Port: 4242}
+	theirUdpAddr2 := &udp.Addr{IP: net.ParseIP("172.16.0.3"), Port: 4242}
+	theirUdpAddr3 := &udp.Addr{IP: net.ParseIP("100.152.0.3"), Port: 4242}
+	theirUdpAddr4 := &udp.Addr{IP: net.ParseIP("24.15.0.3"), Port: 4242}
+	theirVpnIp := iputil.Ip2VpnIp(net.ParseIP("10.128.0.3"))
+
+	c := config.NewC(l)
+	c.Settings["lighthouse"] = map[interface{}]interface{}{"am_lighthouse": true}
+	c.Settings["listen"] = map[interface{}]interface{}{"port": 4242}
+	lh, err := NewLightHouseFromConfig(l, c, &net.IPNet{IP: net.IP{10, 128, 0, 1}, Mask: net.IPMask{255, 255, 255, 0}}, nil, nil)
+	assert.NoError(t, err)
+	lhh := lh.NewRequestHandler()
+
+	// Test that my first update responds with just that
+	newLHHostUpdate(myUdpAddr0, myVpnIp, []*udp.Addr{myUdpAddr1, myUdpAddr2}, lhh)
+	r := newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, myUdpAddr1, myUdpAddr2)
+
+	// Ensure we don't accumulate addresses
+	newLHHostUpdate(myUdpAddr0, myVpnIp, []*udp.Addr{myUdpAddr3}, lhh)
+	r = newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, myUdpAddr3)
+
+	// Grow it back to 2
+	newLHHostUpdate(myUdpAddr0, myVpnIp, []*udp.Addr{myUdpAddr1, myUdpAddr4}, lhh)
+	r = newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, myUdpAddr1, myUdpAddr4)
+
+	// Update a different host and ask about it
+	newLHHostUpdate(theirUdpAddr0, theirVpnIp, []*udp.Addr{theirUdpAddr1, theirUdpAddr2, theirUdpAddr3, theirUdpAddr4}, lhh)
+	r = newLHHostRequest(theirUdpAddr0, theirVpnIp, theirVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, theirUdpAddr1, theirUdpAddr2, theirUdpAddr3, theirUdpAddr4)
+
+	// Have both hosts ask about the other
+	r = newLHHostRequest(theirUdpAddr0, theirVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, myUdpAddr1, myUdpAddr4)
+
+	r = newLHHostRequest(myUdpAddr0, myVpnIp, theirVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, theirUdpAddr1, theirUdpAddr2, theirUdpAddr3, theirUdpAddr4)
+
+	// Make sure we didn't get changed
+	r = newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, myUdpAddr1, myUdpAddr4)
+
+	// Ensure proper ordering and limiting
+	// Send 12 addrs, get 10 back, the last 2 removed, allowing the duplicate to remain (clients dedupe)
+	newLHHostUpdate(
+		myUdpAddr0,
+		myVpnIp,
+		[]*udp.Addr{
+			myUdpAddr1,
+			myUdpAddr2,
+			myUdpAddr3,
+			myUdpAddr4,
+			myUdpAddr5,
+			myUdpAddr5, //Duplicated on purpose
+			myUdpAddr6,
+			myUdpAddr7,
+			myUdpAddr8,
+			myUdpAddr9,
+			myUdpAddr10,
+			myUdpAddr11, // This should get cut
+		}, lhh)
+
+	r = newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(
+		t,
+		r.msg.Details.Ip4AndPorts,
+		myUdpAddr1, myUdpAddr2, myUdpAddr3, myUdpAddr4, myUdpAddr5, myUdpAddr5, myUdpAddr6, myUdpAddr7, myUdpAddr8, myUdpAddr9,
+	)
+
+	// Make sure we won't add ips in our vpn network
+	bad1 := &udp.Addr{IP: net.ParseIP("10.128.0.99"), Port: 4242}
+	bad2 := &udp.Addr{IP: net.ParseIP("10.128.0.100"), Port: 4242}
+	good := &udp.Addr{IP: net.ParseIP("1.128.0.99"), Port: 4242}
+	newLHHostUpdate(myUdpAddr0, myVpnIp, []*udp.Addr{bad1, bad2, good}, lhh)
+	r = newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, good)
+}
+
+func TestLighthouse_reload(t *testing.T) {
+	l := test.NewLogger()
+	c := config.NewC(l)
+	c.Settings["lighthouse"] = map[interface{}]interface{}{"am_lighthouse": true}
+	c.Settings["listen"] = map[interface{}]interface{}{"port": 4242}
+	lh, err := NewLightHouseFromConfig(l, c, &net.IPNet{IP: net.IP{10, 128, 0, 1}, Mask: net.IPMask{255, 255, 255, 0}}, nil, nil)
+	assert.NoError(t, err)
+
+	c.Settings["static_host_map"] = map[interface{}]interface{}{"10.128.0.2": []interface{}{"1.1.1.1:4242"}}
+	lh.reload(c, false)
+}
+
+func newLHHostRequest(fromAddr *udp.Addr, myVpnIp, queryVpnIp iputil.VpnIp, lhh *LightHouseHandler) testLhReply {
+	req := &NebulaMeta{
+		Type: NebulaMeta_HostQuery,
+		Details: &NebulaMetaDetails{
+			VpnIp: uint32(queryVpnIp),
+		},
+	}
+
+	b, err := req.Marshal()
 	if err != nil {
+		panic(err)
+	}
+
+	filter := NebulaMeta_HostQueryReply
+	w := &testEncWriter{
+		metaFilter: &filter,
+	}
+	lhh.HandleRequest(fromAddr, myVpnIp, b, w)
+	return w.lastReply
+}
+
+func newLHHostUpdate(fromAddr *udp.Addr, vpnIp iputil.VpnIp, addrs []*udp.Addr, lhh *LightHouseHandler) {
+	req := &NebulaMeta{
+		Type: NebulaMeta_HostUpdateNotification,
+		Details: &NebulaMetaDetails{
+			VpnIp:       uint32(vpnIp),
+			Ip4AndPorts: make([]*Ip4AndPort, len(addrs)),
+		},
+	}
+
+	for k, v := range addrs {
+		req.Details.Ip4AndPorts[k] = &Ip4AndPort{Ip: uint32(iputil.Ip2VpnIp(v.IP)), Port: uint32(v.Port)}
+	}
+
+	b, err := req.Marshal()
+	if err != nil {
+		panic(err)
+	}
+
+	w := &testEncWriter{}
+	lhh.HandleRequest(fromAddr, vpnIp, b, w)
+}
+
+//TODO: this is a RemoteList test
+//func Test_lhRemoteAllowList(t *testing.T) {
+//	l := NewLogger()
+//	c := NewConfig(l)
+//	c.Settings["remoteallowlist"] = map[interface{}]interface{}{
+//		"10.20.0.0/12": false,
+//	}
+//	allowList, err := c.GetAllowList("remoteallowlist", false)
+//	assert.Nil(t, err)
+//
+//	lh1 := "10.128.0.2"
+//	lh1IP := net.ParseIP(lh1)
+//
+//	udpServer, _ := NewListener(l, "0.0.0.0", 0, true)
+//
+//	lh := NewLightHouse(l, true, &net.IPNet{IP: net.IP{0, 0, 0, 1}, Mask: net.IPMask{255, 255, 255, 0}}, []uint32{ip2int(lh1IP)}, 10, 10003, udpServer, false, 1, false)
+//	lh.SetRemoteAllowList(allowList)
+//
+//	// A disallowed ip should not enter the cache but we should end up with an empty entry in the addrMap
+//	remote1IP := net.ParseIP("10.20.0.3")
+//	remotes := lh.unlockedGetRemoteList(ip2int(remote1IP))
+//	remotes.unlockedPrependV4(ip2int(remote1IP), NewIp4AndPort(remote1IP, 4242))
+//	assert.NotNil(t, lh.addrMap[ip2int(remote1IP)])
+//	assert.Empty(t, lh.addrMap[ip2int(remote1IP)].CopyAddrs([]*net.IPNet{}))
+//
+//	// Make sure a good ip enters the cache and addrMap
+//	remote2IP := net.ParseIP("10.128.0.3")
+//	remote2UDPAddr := NewUDPAddr(remote2IP, uint16(4242))
+//	lh.addRemoteV4(ip2int(remote2IP), ip2int(remote2IP), NewIp4AndPort(remote2UDPAddr.IP, uint32(remote2UDPAddr.Port)), false, false)
+//	assertUdpAddrInArray(t, lh.addrMap[ip2int(remote2IP)].CopyAddrs([]*net.IPNet{}), remote2UDPAddr)
+//
+//	// Another good ip gets into the cache, ordering is inverted
+//	remote3IP := net.ParseIP("10.128.0.4")
+//	remote3UDPAddr := NewUDPAddr(remote3IP, uint16(4243))
+//	lh.addRemoteV4(ip2int(remote2IP), ip2int(remote2IP), NewIp4AndPort(remote3UDPAddr.IP, uint32(remote3UDPAddr.Port)), false, false)
+//	assertUdpAddrInArray(t, lh.addrMap[ip2int(remote2IP)].CopyAddrs([]*net.IPNet{}), remote2UDPAddr, remote3UDPAddr)
+//
+//	// If we exceed the length limit we should only have the most recent addresses
+//	addedAddrs := []*udpAddr{}
+//	for i := 0; i < 11; i++ {
+//		remoteUDPAddr := NewUDPAddr(net.IP{10, 128, 0, 4}, uint16(4243+i))
+//		lh.addRemoteV4(ip2int(remote2IP), ip2int(remote2IP), NewIp4AndPort(remoteUDPAddr.IP, uint32(remoteUDPAddr.Port)), false, false)
+//		// The first entry here is a duplicate, don't add it to the assert list
+//		if i != 0 {
+//			addedAddrs = append(addedAddrs, remoteUDPAddr)
+//		}
+//	}
+//
+//	// We should only have the last 10 of what we tried to add
+//	assert.True(t, len(addedAddrs) >= 10, "We should have tried to add at least 10 addresses")
+//	assertUdpAddrInArray(
+//		t,
+//		lh.addrMap[ip2int(remote2IP)].CopyAddrs([]*net.IPNet{}),
+//		addedAddrs[0],
+//		addedAddrs[1],
+//		addedAddrs[2],
+//		addedAddrs[3],
+//		addedAddrs[4],
+//		addedAddrs[5],
+//		addedAddrs[6],
+//		addedAddrs[7],
+//		addedAddrs[8],
+//		addedAddrs[9],
+//	)
+//}
+
+func Test_ipMaskContains(t *testing.T) {
+	assert.True(t, ipMaskContains(iputil.Ip2VpnIp(net.ParseIP("10.0.0.1")), 32-24, iputil.Ip2VpnIp(net.ParseIP("10.0.0.255"))))
+	assert.False(t, ipMaskContains(iputil.Ip2VpnIp(net.ParseIP("10.0.0.1")), 32-24, iputil.Ip2VpnIp(net.ParseIP("10.0.1.1"))))
+	assert.True(t, ipMaskContains(iputil.Ip2VpnIp(net.ParseIP("10.0.0.1")), 32, iputil.Ip2VpnIp(net.ParseIP("10.0.1.1"))))
+}
+
+type testLhReply struct {
+	nebType    header.MessageType
+	nebSubType header.MessageSubType
+	vpnIp      iputil.VpnIp
+	msg        *NebulaMeta
+}
+
+type testEncWriter struct {
+	lastReply  testLhReply
+	metaFilter *NebulaMeta_MessageType
+}
+
+func (tw *testEncWriter) SendVia(via interface{}, relay interface{}, ad, nb, out []byte, nocopy bool) {
+}
+func (tw *testEncWriter) Handshake(vpnIp iputil.VpnIp) {
+}
+
+func (tw *testEncWriter) SendMessageToVpnIp(t header.MessageType, st header.MessageSubType, vpnIp iputil.VpnIp, p, _, _ []byte) {
+	msg := &NebulaMeta{}
+	err := msg.Unmarshal(p)
+	if tw.metaFilter == nil || msg.Type == *tw.metaFilter {
+		tw.lastReply = testLhReply{
+			nebType:    t,
+			nebSubType: st,
+			vpnIp:      vpnIp,
+			msg:        msg,
+		}
+	}
+
+	if err != nil {
+		panic(err)
+	}
+}
+
+// assertIp4InArray asserts every address in want is at the same position in have and that the lengths match
+func assertIp4InArray(t *testing.T, have []*Ip4AndPort, want ...*udp.Addr) {
+	if !assert.Len(t, have, len(want)) {
 		return
 	}
-	t.Errorf("%s", meh2)
+
-	t.Errorf("%s", n)
+	for k, w := range want {
+		if !(have[k].Ip == uint32(iputil.Ip2VpnIp(w.IP)) && have[k].Port == uint32(w.Port)) {
+			assert.Fail(t, fmt.Sprintf("Response did not contain: %v:%v at %v; %v", w.IP, w.Port, k, translateV4toUdpAddr(have)))
+		}
+	}
+}
+
+// assertUdpAddrInArray asserts every address in want is at the same position in have and that the lengths match
+func assertUdpAddrInArray(t *testing.T, have []*udp.Addr, want ...*udp.Addr) {
+	if !assert.Len(t, have, len(want)) {
+		return
+	}
+
+	for k, w := range want {
+		if !(have[k].IP.Equal(w.IP) && have[k].Port == w.Port) {
+			assert.Fail(t, fmt.Sprintf("Response did not contain: %v at %v; %v", w, k, have))
+		}
+	}
+}
+
+func translateV4toUdpAddr(ips []*Ip4AndPort) []*udp.Addr {
+	addrs := make([]*udp.Addr, len(ips))
+	for k, v := range ips {
+		addrs[k] = NewUDPAddrFromLH4(v)
+	}
+	return addrs
 }
-*/