test_dgram_multicast_membership.js

/* Copyright 2016-present Samsung Electronics Co., Ltd. and other contributors
 *
 * 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 assert = require('assert');
var dgram = require('dgram');
var MODE = process.argv[2] || 'echo';
var SERVER = 'server';
var CLIENT = 'client';
var ECHO = 'echo';

if (MODE !== 'server' && MODE !== 'client' && MODE !== 'echo') {
  console.log(
    'usage: iotjs test_dgram_multicast_membership.js server|client|echo');
  assert(false);
}

var port = 41239;
var multicast_address = '230.255.255.250';
var interval = 1000;
var msg = 'Hello IoT.js';

if (MODE !== CLIENT) { // for server and echo
  var recv_count = 0;
  var server = dgram.createSocket('udp4');

  server.on('message', function(data, rinfo) {
    console.log('server got data : ' + data);
    recv_count++;
    if (recv_count == 1) {
      server.dropMembership(multicast_address);
    }
  });

  server.bind(port, function() {
    server.addMembership(multicast_address);
  });

  server.on('error', function(err) {
    assert.fail();
    server.close();
  });

  setTimeout(function() {
    server.close();
  }, 5000);
}

if (MODE !== SERVER) { // for client and echo
  var send_count = 0;
  var client = dgram.createSocket('udp4');

  var timer = setInterval(function () {
    send_count++;

    console.log('client send data : ' + msg);
    client.send(msg, port, multicast_address);
    if (send_count == 3) {
      clearInterval(timer);
    }
  }, interval);

  setTimeout(function() {
    client.close();
  }, 5000);
}

process.on('exit', function(code) {
  assert.equal(code, 0);

  if (MODE !== CLIENT) {
    assert.equal(recv_count, 1);
  }
  if (MODE !== SERVER) {
    assert.equal(send_count, 3);
  }
});