| /******************************************************************************* |
| * Copyright (c) 2012, 2017 IBM Corp. |
| * |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * and Eclipse Distribution License v1.0 which accompany this distribution. |
| * |
| * The Eclipse Public License is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * and the Eclipse Distribution License is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * Contributors: |
| * Ian Craggs - initial contribution |
| *******************************************************************************/ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include "MQTTAsync.h" |
| |
| #if !defined(WIN32) |
| #include <unistd.h> |
| #else |
| #include <windows.h> |
| #endif |
| |
| #include <OsWrapper.h> |
| |
| #define ADDRESS "tcp://localhost:1883" |
| #define CLIENTID "ExampleClientSub" |
| #define TOPIC "MQTT Examples" |
| #define PAYLOAD "Hello World!" |
| #define QOS 1 |
| #define TIMEOUT 10000L |
| |
| volatile MQTTAsync_token deliveredtoken; |
| |
| int disc_finished = 0; |
| int subscribed = 0; |
| int finished = 0; |
| |
| void connlost(void *context, char *cause) |
| { |
| MQTTAsync client = (MQTTAsync)context; |
| MQTTAsync_connectOptions conn_opts = MQTTAsync_connectOptions_initializer; |
| int rc; |
| |
| printf("\nConnection lost\n"); |
| if (cause) |
| printf(" cause: %s\n", cause); |
| |
| printf("Reconnecting\n"); |
| conn_opts.keepAliveInterval = 20; |
| conn_opts.cleansession = 1; |
| if ((rc = MQTTAsync_connect(client, &conn_opts)) != MQTTASYNC_SUCCESS) |
| { |
| printf("Failed to start connect, return code %d\n", rc); |
| finished = 1; |
| } |
| } |
| |
| |
| int msgarrvd(void *context, char *topicName, int topicLen, MQTTAsync_message *message) |
| { |
| int i; |
| char* payloadptr; |
| |
| printf("Message arrived\n"); |
| printf(" topic: %s\n", topicName); |
| printf(" message: "); |
| |
| payloadptr = message->payload; |
| for(i=0; i<message->payloadlen; i++) |
| { |
| putchar(*payloadptr++); |
| } |
| putchar('\n'); |
| MQTTAsync_freeMessage(&message); |
| MQTTAsync_free(topicName); |
| return 1; |
| } |
| |
| |
| void onDisconnect(void* context, MQTTAsync_successData* response) |
| { |
| printf("Successful disconnection\n"); |
| disc_finished = 1; |
| } |
| |
| |
| void onSubscribe(void* context, MQTTAsync_successData* response) |
| { |
| printf("Subscribe succeeded\n"); |
| subscribed = 1; |
| } |
| |
| void onSubscribeFailure(void* context, MQTTAsync_failureData* response) |
| { |
| printf("Subscribe failed, rc %d\n", response ? response->code : 0); |
| finished = 1; |
| } |
| |
| |
| void onConnectFailure(void* context, MQTTAsync_failureData* response) |
| { |
| printf("Connect failed, rc %d\n", response ? response->code : 0); |
| finished = 1; |
| } |
| |
| |
| void onConnect(void* context, MQTTAsync_successData* response) |
| { |
| MQTTAsync client = (MQTTAsync)context; |
| MQTTAsync_responseOptions opts = MQTTAsync_responseOptions_initializer; |
| 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); |
| opts.onSuccess = onSubscribe; |
| opts.onFailure = onSubscribeFailure; |
| opts.context = client; |
| |
| deliveredtoken = 0; |
| |
| if ((rc = MQTTAsync_subscribe(client, TOPIC, QOS, &opts)) != MQTTASYNC_SUCCESS) |
| { |
| printf("Failed to start subscribe, return code %d\n", rc); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| |
| int main(int argc, char* argv[]) |
| { |
| MQTTAsync client; |
| MQTTAsync_connectOptions conn_opts = MQTTAsync_connectOptions_initializer; |
| MQTTAsync_disconnectOptions disc_opts = MQTTAsync_disconnectOptions_initializer; |
| int rc; |
| int ch; |
| |
| MQTTAsync_create(&client, ADDRESS, CLIENTID, MQTTCLIENT_PERSISTENCE_NONE, NULL); |
| |
| MQTTAsync_setCallbacks(client, client, connlost, msgarrvd, NULL); |
| |
| conn_opts.keepAliveInterval = 20; |
| conn_opts.cleansession = 1; |
| conn_opts.onSuccess = onConnect; |
| conn_opts.onFailure = onConnectFailure; |
| conn_opts.context = client; |
| if ((rc = MQTTAsync_connect(client, &conn_opts)) != MQTTASYNC_SUCCESS) |
| { |
| printf("Failed to start connect, return code %d\n", rc); |
| exit(EXIT_FAILURE); |
| } |
| |
| while (!subscribed) |
| #if defined(WIN32) |
| Sleep(100); |
| #else |
| usleep(10000L); |
| #endif |
| |
| if (finished) |
| goto exit; |
| |
| do |
| { |
| ch = getchar(); |
| } while (ch!='Q' && ch != 'q'); |
| |
| disc_opts.onSuccess = onDisconnect; |
| if ((rc = MQTTAsync_disconnect(client, &disc_opts)) != MQTTASYNC_SUCCESS) |
| { |
| printf("Failed to start disconnect, return code %d\n", rc); |
| exit(EXIT_FAILURE); |
| } |
| while (!disc_finished) |
| #if defined(WIN32) |
| Sleep(100); |
| #else |
| usleep(10000L); |
| #endif |
| |
| exit: |
| MQTTAsync_destroy(&client); |
| return rc; |
| } |