private Packet DoRecieve(MQTTClient mqttClient, IEnumerable<byte> dataBytes, out bool disconnect)
        {
            // declare hub
            var hubContext = GlobalHost.ConnectionManager.GetHubContext<BrokerHub>();

            List<byte> byteList = dataBytes.ToList();
            MQTTPacketTypes mqttPacketType = (MQTTPacketTypes)byteList.First();
            disconnect = false;
            string data = string.Empty;
            Packet responsePacket = null;
            Console.ForegroundColor = ConsoleColor.Red;
            switch (mqttPacketType)
            {
                // types we should recieve
                case MQTTPacketTypes.PUBLISH:
                    Console.WriteLine("PUBLISH recieved");
                    var pubPacket = new Publish(byteList);
                    PublishToAllClients(pubPacket.TopicName, pubPacket.Payload);
                    data = string.Format("Topic: {0} Data: {1}", pubPacket.TopicName, pubPacket.Payload);
                    // responsePacket = new Puback();
                    break;
                case MQTTPacketTypes.DISCONNECT:
                    Console.WriteLine("DISCONNECT recieved");
                    disconnect = true; // handle at the higher level
                    MQTTClient temp;
                    if (!ClientCollection.TryRemove(mqttClient.UniqueId, out temp))
                    {
                        //Trace.WriteLine("Error occurred removing client from client collection");
                    }
                    hubContext.Clients.All.clientDisconnected(mqttClient.UniqueId);
                    break;
                case MQTTPacketTypes.PINGREQ:
                    Console.WriteLine("PINGREQ recieved");
                    var pingRespPacket = new Pingresp();
                    responsePacket = pingRespPacket;
                    break;
                case MQTTPacketTypes.UNSUBSCRIBE:
                    Console.WriteLine("UNSUBSCRIBE recieved");
                    var unsubPacket = new Unsubscribe((List<byte>)dataBytes);

                    string summaryString = string.Empty;
                    foreach (var topic in unsubPacket.TopicNames)
                    {
                        hubContext.Clients.All.removeSubscription(mqttClient.UniqueId, topic);
                        summaryString += topic + " ";
                    }

                    data = string.Format("Topics: {0}",summaryString);

                    // remove all subscriptions in unsubscribe
                    mqttClient.SubscriptionList = mqttClient.SubscriptionList.Except(unsubPacket.TopicNames).ToList();

                    var unsubackPacket = new Unsuback(unsubPacket.PacketId);
                    responsePacket = unsubackPacket;
                    break;
                case MQTTPacketTypes.SUBSCRIBE:
                    Console.WriteLine("SUBSCRIBE recieved");
                    var subPacket = new Subscribe((List<byte>)dataBytes);

                    List<int> subSuccess = new List<int>();
                    foreach (var item in subPacket.subList)
                    {
                        if(!mqttClient.SubscriptionList.Contains(item.Name))
                        {
                            mqttClient.SubscriptionList.Add(item.Name);
                            subSuccess.Add(1);
                        }
                        else
                            subSuccess.Add(0);
                    }
                    string summaryString2 = string.Empty;
                    foreach (var topic in subPacket.subList)
                    {
                        hubContext.Clients.All.addSubscription(mqttClient.UniqueId, topic.Name);
                        summaryString2 += topic.Name + " ";
                    }

                    data = string.Format("Topics: {0}",summaryString2);

                    var subAckPacket = new Suback(subPacket.PacketId, subSuccess.ToArray());
                    responsePacket = subAckPacket;
                    break;
                case MQTTPacketTypes.CONNECT:
                    Console.WriteLine("CONNECT recieved");
                    var connectPacket = new Connect((List<byte>)dataBytes);
                    mqttClient.ClientID = connectPacket.ClientId;
                    ClientCollection.GetOrAdd(clientCounter, mqttClient);
                    hubContext.Clients.All.newClientConnected(mqttClient);
                    responsePacket = new Connack();
                    break;
                // types we should NOT recieve
                case MQTTPacketTypes.CONNACK:
                    Console.WriteLine("CONNACK recieved");
                    break;
                case MQTTPacketTypes.SUBACK:
                    Console.WriteLine("SUBACK recieved");
                    break;
                case MQTTPacketTypes.PINGRESP:
                    Console.WriteLine("PINGRESP recieved");
                    break;
                case MQTTPacketTypes.UNSUBACK:
                    Console.WriteLine("UNSUBACK recieved");
                    break;
                default:
                    Console.WriteLine("Unknown packet recieved");
                    break;

            }
            Console.ResetColor();
            hubContext.Clients.All.newPacketRecieved(true, mqttClient.UniqueId, Enum.GetName(typeof(MQTTPacketTypes), mqttPacketType), data, DateTime.Now.ToLongTimeString());
            return responsePacket;
        }
        private void DoRecieve(List<byte> dataBytes)
        {
            MQTTPacketTypes mqttPacketType = (MQTTPacketTypes)dataBytes.First();
            string payload = string.Empty;
            string topic = string.Empty;
            int? packetId = null;

            switch (mqttPacketType)
            {

                case MQTTPacketTypes.CONNACK:
                    Connected = true;
                    payload = "Connection acknowledged";
                    break;
                case MQTTPacketTypes.PUBLISH:
                    var pubPacket = new Publish(dataBytes);
                    payload = pubPacket.Payload;
                    topic = pubPacket.TopicName;
                    break;
                case MQTTPacketTypes.PUBACK:
                    payload = "Publish acknowledged";
                    break;
                case MQTTPacketTypes.SUBACK:
                    var subackPacket = new Suback(dataBytes);
                    packetId = subackPacket.PacketId;
                    payload = "Subscription acknowledged";
                    break;
                case MQTTPacketTypes.UNSUBACK:
                    var unsubackPacket = new Unsuback(dataBytes);
                    packetId = unsubackPacket.PacketId;
                    payload = "Unsubscription acknowledged";
                    break;
                case MQTTPacketTypes.PINGRESP:
                    payload = "Ping response.";
                    break;

                // other packet types that our clients shouldn't recieve
                case MQTTPacketTypes.DISCONNECT:
                case MQTTPacketTypes.PINGREQ:
                case MQTTPacketTypes.UNSUBSCRIBE:
                case MQTTPacketTypes.SUBSCRIBE:
                case MQTTPacketTypes.CONNECT:
                default:
                    payload = "Invalid receive or unknown packet";
                    break;

            }
            AddListViewItem(true, mqttPacketType, packetId, topic, payload, DateTime.Now);
        }