Add test to check relaying

Author: arianvp

.github/workflows/ci.yml

@@ -8,4 +8,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - run: docker build .
+      - name: Build container
+        run: |
+          git_hash=$(git rev-parse --short "$GITHUB_SHA")
+          docker build . -t quay.io/wire/restund:$git_hash
+          docker run --network=host --volume $(pwd)/etc/restund.conf:/etc/restund.conf:ro --volume $(pwd)/etc/restund.auth:/etc/restund.auth quay.io/wire/restund:$git_hash &
+      - name: Test if relaying localhost and friends is blocked
+        run: |
+          sudo apt-get update && sudo apt-get install -y coturn
+          ./test.sh

test.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -x
+! turnutils_uclient  127.0.0.1 -X -u demo -w secret -e 127.0.0.1 || exit 1
+! turnutils_uclient  127.0.0.1 -X -u demo -w secret -e 127.0.0.2 || exit 1
+! turnutils_uclient  127.0.0.1 -X -u demo -w secret -e 255.255.255.255 || exit 1
+! turnutils_uclient  127.0.0.1 -X -u demo -w secret -e 169.254.0.1 || exit 1
+! turnutils_uclient  127.0.0.1 -X -u demo -w secret -e 0.0.0.0 || exit 1
+! turnutils_uclient  127.0.0.1 -X -u demo -w secret -e "::1" || exit 1
+! turnutils_uclient  127.0.0.1 -X -u demo -w secret -e "::" || exit 1
+! turnutils_uclient  127.0.0.1 -X -u demo -w secret -e "fe80::" || exit 1
+
+