const dgram = require('dgram');
let client = dgram.createSocket('udp4');
let server = dgram.createSocket('udp4');
let message = process.argv[2] || 'message';

message = Buffer.from(message);
server.on('message', msg => {
    process.stdout.write(`got message: ${msg}\n`);
    process.exit();
}).bind(41234);

client.send(message, 0, message.length, 41234, 'localhost');