text: /*
   * Copyright 2017 dmb.star-net.cn
   *
   * 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.
   */
  
  'use strict'
  var BasicPacket = require('./basic_packet.js')
  var Objects = require('../../utils/objects.js')
  var PacketType = require('./packet_type.js')
  var FixedBuffer = require('../buffer/fixed_buffer.js')
  
  var PongPacket = function () {
  }
  
  Objects.extends(false, PongPacket, BasicPacket)
  
  PongPacket.prototype.getPacketType = function () {
    return PacketType.CONTROL_PONG
  }
  
  PongPacket.prototype.toBuffer = function () {
    var buffer = new FixedBuffer(2)
    buffer.writeShort(PacketType.CONTROL_PONG)
    return buffer.getBuffer()
  }
  
  
  module.exports = PongPacket
  