#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#if !defined(_WIN32)
#include <unistd.h>
#else
#include <windows.h>
#endif
 
#if defined(_WRS_KERNEL)
#include <OsWrapper.h>
#endif
 
#define ADDRESS     "tcp://mqtt.eclipse.org:1883"
#define CLIENTID    "ExampleClientSub"
#define TOPIC       "MQTT Examples"
#define PAYLOAD     "Hello World!"
#define QOS         1
#define TIMEOUT     10000L
 
int disc_finished = 0;
int subscribed = 0;
int finished = 0;
 
void connlost(void *context, char *cause)
{
        int rc;
 
        printf("\nConnection lost\n");
        if (cause)
                printf("     cause: %s\n", cause);
 
        printf("Reconnecting\n");
        {
                printf("Failed to start connect, return code %d\n", rc);
                finished = 1;
        }
}
 
 
int msgarrvd(
void *context, 
char *topicName, 
int topicLen, 
MQTTAsync_message *message)
 
{
    printf("Message arrived\n");
    printf("     topic: %s\n", topicName);
    return 1;
}
 
{
        printf(
"Disconnect failed, rc %d\n", response->
code);
        disc_finished = 1;
}
 
{
        printf("Successful disconnection\n");
        disc_finished = 1;
}
 
{
        printf("Subscribe succeeded\n");
        subscribed = 1;
}
 
{
        printf(
"Subscribe failed, rc %d\n", response->
code);
        finished = 1;
}
 
 
{
        printf(
"Connect failed, rc %d\n", response->
code);
        finished = 1;
}
 
 
{
        int rc;
 
        printf("Successful connection\n");
 
        printf("Subscribing to topic %s\nfor client %s using QoS%d\n\n"
           "Press Q<Enter> to quit\n\n", TOPIC, CLIENTID, QOS);
        {
                printf("Failed to start subscribe, return code %d\n", rc);
                finished = 1;
        }
}
 
 
int main(int argc, char* argv[])
{
        int rc;
        int ch;
 
        {
                printf("Failed to create client, return code %d\n", rc);
                rc = EXIT_FAILURE;
                goto exit;
        }
 
        {
                printf("Failed to set callbacks, return code %d\n", rc);
                rc = EXIT_FAILURE;
                goto destroy_exit;
        }
 
        {
                printf("Failed to start connect, return code %d\n", rc);
                rc = EXIT_FAILURE;
                goto destroy_exit;
        }
 
        while (!subscribed && !finished)
                #if defined(_WIN32)
                        Sleep(100);
                #else
                        usleep(10000L);
                #endif
 
        if (finished)
                goto exit;
 
        do
        {
                ch = getchar();
        } while (ch!='Q' && ch != 'q');
 
        {
                printf("Failed to start disconnect, return code %d\n", rc);
                rc = EXIT_FAILURE;
                goto destroy_exit;
        }
        while (!disc_finished)
        {
                #if defined(_WIN32)
                        Sleep(100);
                #else
                        usleep(10000L);
                #endif
        }
 
destroy_exit:
exit:
        return rc;
}