VILLASnode/tests/integration/node-loopback-socket.sh

#!/usr/bin/env bash
#
# Integration loopback test using villas node.
#
# Author: Steffen Vogel <post@steffenvogel.de>
# SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
# SPDX-License-Identifier: Apache-2.0

set -e

if [ "${EUID}" -ne 0 ] || [ -n "${CI}" ]; then
    echo "Test requires root permissions"
    exit 99
fi

DIR=$(mktemp -d)
pushd ${DIR}

function finish {
    popd
    rm -rf ${DIR}

    kill -SIGTERM 0 # kill all decendants
}
trap finish EXIT

NUM_SAMPLES=${NUM_SAMPLES:-10}

cat > config.json <<EOF
{
    "nodes": {
        "node1": {
             "type": "socket",
             "in": {
             	"address": "127.0.0.1:12000",
             	"signals": {
             		"type": "float",
             		"count": 1
             	}
             },
             "out": {
             	"address": "127.0.0.1:12001"
             }
        },
        "node2": {
             "type": "socket",
             "in": {
             	"address": "127.0.0.1:12001",
             	"signals": {
             		"type": "float",
             		"count": 1
             	}
             },
             "out": {
             	"address": "127.0.0.1:12000"
             }
        }
    },
    "paths": [
        {
             "in": "node1",
             "out": "node1"
        }
    ]
}
EOF

VILLAS_LOG_PREFIX="[signal] " \
villas signal -l ${NUM_SAMPLES} -n random > input.dat

VILLAS_LOG_PREFIX="[node] " \
villas node config.json &

# Wait for node to complete init
sleep 2

# Send / Receive data to node
VILLAS_LOG_PREFIX="[pipe] " \
villas pipe -l ${NUM_SAMPLES} config.json node2 > output.dat < input.dat

# Wait for node to handle samples
sleep 1

kill %%
wait %%

# Send / Receive data to node
VILLAS_LOG_PREFIX="[compare] " \
villas compare input.dat output.dat

cat > config.json <<EOF
{
    "nodes": {
        "node1": {
             "type": "socket",
             "layer": "tcp-server",
             "in": {
             	"address": "127.0.0.1:12002",
             	"signals": {
             		"type": "float",
             		"count": 1
             	}
             },
             "out": {
             	"address": "127.0.0.1:12003"
             }
        },
        "node2": {
             "type": "socket",
             "layer": "tcp-client",
             "in": {
             	"address": "127.0.0.1:12003",
             	"signals": {
             		"type": "float",
             		"count": 1
             	}
             },
             "out": {
             	"address": "127.0.0.1:12002"
             }
        },
        "siggen": {
             "type": "signal",
             "signal": "random",
             "limit": 10
        }
    },
    "paths": [
        {
             "in": "siggen",
             "out": "node2",
             "hooks": [
             	{
             		"type": "print",

             		"output": "input.dat"
             	}
             ]
        },
        {
             "in": "node1",
             "out": "node1"
        },
        {
            "in": "node2",
            "hooks": [
             	{
             		"type": "print",

                    "output": "output.dat"
             	}
             ]
        }
    ]
}
EOF

VILLAS_LOG_PREFIX="[node] " \
villas node config.json &

# Wait for node to complete init
sleep 3

kill %%
wait %%

# Compare data
VILLAS_LOG_PREFIX="[compare] " \
villas compare input.dat output.dat