Question

我一直在尝试使用mosquitto lib开发一个C代码，通过TLS在mosquitto代理上发布消息。我在mosquitto侧配置了TLS，它工作正常。我能够使用mosquitto_pub和mosquitto_sub发送和接收消息。

但是，当我尝试使用我的C代码发布消息时，它不起作用。显然，代码连接正常并发送消息，没有错误，但订阅者不读任何内容。

以下是我正在使用的发布商代码：

ReportSender::ReportSender()
{
    mosquitto_lib_init();

    mosquitoStruct = mosquitto_new (NULL, true, NULL);

    mosquitto_tls_opts_set(mosquitoStruct, 1, NULL, NULL);

    mosquitto_tls_set(mosquitoStruct, "~/temp/keys/secondAttempt/server.crt", NULL, NULL, NULL, NULL);

    mosquitto_tls_insecure_set(mosquitoStruct, false);

    mosquitto_connect_callback_set(mosquitoStruct, connect_cb);
    mosquitto_publish_callback_set(mosquitoStruct, publish_cb);
    mosquitto_log_callback_set(mosquitoStruct, log_cb);

    mosquitto_connect (mosquitoStruct, MQTT_BROKER, MQTT_PORT, 0);

    const char *reportRef = "Hello Word!";

    // Publish the message to the topic
    mosquitto_publish (mosquitoStruct, NULL, MQTT_TOPIC,
              strlen(reportRef), reportRef, 0, false);

    sleep (20);
}

订阅者是：

mosquitto_sub -h 192.168.56.101 -p 8883 -t "#" -v --cafile server.crt

有什么问题？

谢谢，莫罗

Answer 1

您应该查看循环*（）函数集，这些是处理后台网络流量所必需的。 publish（）不是阻塞调用。

Mosquitto发布者不发布任何消息

1 个答案: