udp_server.js

// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

var udp = require('dgram');
var server = udp.createSocket('udp4');

module.exports = function(emitter, port) {
  server.on('error', function(err) {
    emitter.emit('error', err);
  });

  server.on('message', function(msg) {
    emitter.emit('message', msg);
  });

  server.on('listening', function() {
    emitter.emit('listening');
  });

  server.bind(port);
}