enable broadcast traffic relay (#243)

* enable broadcast traffic relay

Author: sevenEng

databox-build-core

@@ -25,7 +25,16 @@ build()
 {
     echo "[$(datef) $ME]: Starting build ${1} ..."
     cd $1
-    OUTPUT=$(docker build -t $2 -f Dockerfile${DATABOX_ARCH} .)
+
+    DOCKERFILE=""
+    if [ -z "$3" ]
+    then
+      DOCKERFILE="Dockerfile${DATABOX_ARCH}"
+    else
+      DOCKERFILE="${3}${DATABOX_ARCH}"
+    fi
+
+    OUTPUT=$(docker build -t $2 -f ${DOCKERFILE} .)
     test_assert $? 0 "Build ${1}" "$OUTPUT"
     cd ..
 }
@@ -36,3 +45,4 @@ build "core-arbiter" "arbiter"
 build "core-export-service" "export-service"
 build "core-store" "core-store"
 build "core-network" "core-network"
+build "core-network" "core-network-relay" "Dockerfile-relay"

databox-start

@@ -191,6 +191,14 @@ err "Starting Databox"
 
 docker network create -d overlay --attachable databox-system-net
 
+BCAST_FIFO="/tmp/databox_relay"
+export BCAST_FIFO=${BCAST_FIFO}
+export BCAST_IP=${EXT_IP}
+
+if [ ! -p "${BCAST_FIFO}" ]; then
+  mkfifo ${BCAST_FIFO}
+fi
+
 docker-compose -f ./docker-core-network.yaml up -d
 _exec node ./src/createResolvConf.js "$(docker inspect $(docker ps -q --filter="name=databox-network"))"
 

databox-stop

@@ -60,6 +60,8 @@ err "Stopping and Removing databox-bridge ..."
 docker-compose -f ./docker-core-network.yaml down
 err "Removing network databox-system-net ..."
 docker network rm databox-system-net >/dev/null 2>&1
+err "Deleting broadcast relay fifo ..."
+rm /tmp/databox_relay
 
 err "Waiting ..."
 sleep 10 # give docker some time to remove the networks etc

docker-core-network.yaml

@@ -10,9 +10,18 @@ services:
     volumes:
       - './certs/arbiterToken-databox-network:/run/secrets/DATABOX_NETWORK_KEY'
       - './certs/databox-network.pem:/run/secrets/DATABOX_NETWORK.pem'
+      - '${BCAST_FIFO}:/tmp/relay'
+    command: ["-f", "/tmp/relay"]
     cap_add:
       - NET_ADMIN
 
+  databox-broadcast-relay:
+    image: ${DOCKER_REPO}core-network-relay:${DATABOX_CORE_IMAGE_VERSION}
+    network_mode: "host"
+    volumes:
+      - '${BCAST_FIFO}:/tmp/relay'
+    command: ["-f", "/tmp/relay", "-h", "${BCAST_IP}"]
+
 networks:
   databox-system-net:
     external: true