在端口8883

Question

我正在构建一个用于通过MQTT发布数据的C＃应用​​程序。应允许用户选择是否要使用SSL。 1883年的MQTT连接工作正常。但我遇到了试图通过端口8883实现的问题。我对MqttClient类重载方法感到困惑。我遵循了link。

MqttClient client = new MqttClient("broker.hivemq.com",
              MqttSettings.MQTT_BROKER_DEFAULT_SSL_PORT,
              true,
              new X509Certificate(Resources.m2mqtt_ca));

但是当我尝试实现相同的操作时，我遇到了构建错误

Error   1   'uPLibrary.Networking.M2Mqtt.MqttClient' does not contain a constructor that takes 4 arguments.

所以我决定让下一个字段与我的ca证书保持一致，并为SSL选择一个随机版本。以下是我的客户端代码。

private void btnConnect_Click(object sender, EventArgs e)
{
  try
  {
    client = new MqttClient(ddlServerIP.Text,
                 MqttSettings.MQTT_BROKER_DEFAULT_SSL_PORT,
                 true, 
                 new X509Certificate("C:/openSSLcertificate/m2mqtt_ca.crt",new X509Certificate("C:/openSSLcertificate/m2mqtt_ca.crt"),
                 MqttSslProtocols.TLSv1_0);  
    String clientId= Guid.NewGuid().ToString();
    byte code = client.Connect(clientId);
    switch (code)
    {
      case 0:
        MessageBox.Show("Connection Accepted with return code " + code);
        Simulation frmSim = new Simulation();
        frmSim.FormClosed += new FormClosedEventHandler(Simulation_FormClosed);
        frmSim.Show();
        BEConnect frmBeConnect = new BEConnect();
        FormProvider.MainMenu.Hide();
        break;

      case 1:
        MessageBox.Show("Connection Refused with return code " + code + Environment.NewLine + " unacceptable protocol version");
        break;
      case 2:
        MessageBox.Show("Connection Refused with return code " + code + Environment.NewLine + " identifier rejected");
        break;
      case 3:
        MessageBox.Show("Connection Refused with return code " + code + Environment.NewLine + " Server unavailable");
        break;
      case 4:
        MessageBox.Show("Connection Refused with return code " + code + Environment.NewLine + " bad user name or password");
        break;
      case 5: 
        MessageBox.Show("Connection Refused with return code " + code + Environment.NewLine + " not authorized");
        break;
      default:
        MessageBox.Show("Connection Failed");
        break;
      }

    }
    catch(Exception ex)
    {
      MessageBox.Show(ex.Message);
    }

  } 

我还对我的mosquitto.conf文件进行了以下更改，该文件在我的服务器端Raspberry Pi上运行。我最终还是得到了一个连接到经纪人的例外。

log_dest file /var/log/mosquitto/mosquitto.log

include_dir /etc/mosquitto/conf.d

port 1883

listener 8883
cafile /etc/mosquitto/ca_certificates/m2mqtt_ca.crt
certfile /etc/mosquitto/certs/m2mqtt_srv.crt
keyfile /etc/mosquitto/certs/m2mqtt_srv.key
require_certificate false

Mosquitto日志如下：

1510146433: New connection from 192.168.0.9 on port 8883. 
1510146433: OpenSSL Error: error:1408A0C1:SSL routines:SSL3_GET_CLIENT_HELLO:no shared cipher 
1510146433: Socket error on client <unknown>, disconnecting