/// <summary>
/// Connect to broker
/// </summary>
/// <param name="clientId">Client identifier</param>
/// <param name="username">Username</param>
/// <param name="password">Password</param>
/// <param name="willRetain">Will retain flag</param>
/// <param name="willQosLevel">Will QOS level</param>
/// <param name="willFlag">Will flag</param>
/// <param name="willTopic">Will topic</param>
/// <param name="willMessage">Will message</param>
/// <param name="cleanSession">Clean sessione flag</param>
/// <param name="keepAlivePeriod">Keep alive period</param>
/// <returns>Return code of CONNACK message from broker</returns>
public byte Connect(string clientId,
string username = null,
string password = null,
bool willRetain = false,
byte willQosLevel = MqttMsgConnect.QOS_LEVEL_AT_LEAST_ONCE,
bool willFlag = false,
string willTopic = null,
string willMessage = null,
bool cleanSession = true,
ushort keepAlivePeriod = MqttMsgConnect.KEEP_ALIVE_PERIOD_DEFAULT)
{
// create CONNECT message
MqttMsgConnect connect = new MqttMsgConnect(clientId,
username,
password,
willRetain,
willQosLevel,
willFlag,
willTopic,
willMessage,
cleanSession,
keepAlivePeriod);
try
{
this.socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// try connection to the broker
this.socket.Connect(new IPEndPoint(this.brokerIpAddress, this.brokerPort));
}
catch
{
throw new MqttConnectionException();
}
this.lastSend = 0;
this.isRunning = true;
// start thread for receiving messages from broker
this.receiveThread = new Thread(this.ReceiveThread);
this.receiveThread.Start();
MqttMsgConnack connack = (MqttMsgConnack)this.SendReceive(connect.GetBytes());
// if connection accepted, start keep alive timer
if (connack.ReturnCode == MqttMsgConnack.CONN_ACCEPTED)
{
this.IsConnected = true;
this.keepAlivePeriod = keepAlivePeriod * 1000; // convert in ms
// start thread for sending keep alive message to the broker
this.keepAliveThread = new Thread(this.KeepAliveThread);
this.keepAliveThread.Start();
}
return(connack.ReturnCode);
}
