public IResult Start()
{
Uri endpoint = new Uri(MqttConfig.BrokerEndpoint);
MqttSslProtocols protocols = MqttConfig.SecureConnection ? MqttSslProtocols.TLSv1_2 : MqttSslProtocols.None;
X509Certificate caCert = null;
X509Certificate clientCert = null;
if (MqttConfig.Security != null && MqttConfig.Security is MqttSecurity security)
{
caCert = security.CaCert ?? null;
clientCert = security.ClientCert ?? null;
}
mqttClient = new MqttClient(endpoint.Host, endpoint.Port, MqttConfig.SecureConnection, caCert, clientCert, protocols, null, null);
mqttClient.ConnectionClosed += MqttClient_ConnectionClosed;
try
{
byte success;
MqttConnectConfig config = MqttConfig.MqttConnectConfig;
if (MqttConfig.Credentials is MqttCredentials mqttCreds)
{
success = mqttClient.Connect(Guid.NewGuid().ToString(), mqttCreds.UserName, mqttCreds.Password, config.WillRetain, config.WillQosLevel, config.WillFlag, config.WillTopic, config.WillMessage, config.CleanSession, config.KeepAlivePeriod);
}
else
{
success = mqttClient.Connect(Guid.NewGuid().ToString(), null, null, config.WillRetain, config.WillQosLevel, config.WillFlag, config.WillTopic, config.WillMessage, config.CleanSession, config.KeepAlivePeriod);
}
if (success != 0)
{
return(new Result(false, new Message(MessageType.Error, "Could not connect to MQTT Broker", success.ToString())));
}
mqttClient.MqttMsgPublishReceived += MqttClient_MqttMsgPublishReceived;
return(new Result(true));
}
catch (Exception e)
{
logger.Error(e, "Could not connect MQTT-Broker");
return(new Result(e));
}
}
public MqttConfig(string clientId, string brokerEndpoint)
{
ClientId = clientId;
BrokerEndpoint = brokerEndpoint;
MqttConnectConfig = new MqttConnectConfig();
}