mirror of
https://github.com/g4klx/MMDVMHost
synced 2025-12-22 08:05:49 +08:00
130 lines
3.2 KiB
C++
130 lines
3.2 KiB
C++
/*
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* Copyright (C) 2022 by Jonathan Naylor G4KLX
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "MQTTPublisher.h"
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#include <cassert>
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#include <cstdio>
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#include <cstring>
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CMQTTPublisher::CMQTTPublisher(const std::string& host, unsigned short port, const std::string& name, unsigned int keepalive, MQTT_QOS qos) :
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m_host(host),
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m_port(port),
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m_name(name),
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m_keepalive(keepalive),
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m_qos(qos),
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m_mosq(NULL),
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m_connected(false)
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{
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assert(!host.empty());
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assert(port > 0U);
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assert(!name.empty());
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assert(keepalive >= 5U);
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::mosquitto_lib_init();
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}
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CMQTTPublisher::~CMQTTPublisher()
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{
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::mosquitto_lib_cleanup();
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}
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bool CMQTTPublisher::open()
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{
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m_mosq = ::mosquitto_new(m_name.c_str(), true, this);
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if (m_mosq == NULL){
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::fprintf(stderr, "MQTT Error newing: Out of memory.\n");
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return false;
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}
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::mosquitto_connect_callback_set(m_mosq, onConnect);
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::mosquitto_disconnect_callback_set(m_mosq, onDisconnect);
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int rc = ::mosquitto_connect(m_mosq, m_host.c_str(), m_port, m_keepalive);
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if (rc != MOSQ_ERR_SUCCESS) {
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::mosquitto_destroy(m_mosq);
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m_mosq = NULL;
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::fprintf(stderr, "MQTT Error connecting: %s\n", ::mosquitto_strerror(rc));
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return false;
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}
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rc = ::mosquitto_loop_start(m_mosq);
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if (rc != MOSQ_ERR_SUCCESS) {
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::mosquitto_disconnect(m_mosq);
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::mosquitto_destroy(m_mosq);
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m_mosq = NULL;
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::fprintf(stderr, "MQTT Error loop starting: %s\n", ::mosquitto_strerror(rc));
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return false;
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}
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return true;
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}
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bool CMQTTPublisher::publish(const char* topic, const char* text)
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{
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assert(topic != NULL);
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assert(text != NULL);
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if (!m_connected)
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return false;
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char topicEx[100U];
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::sprintf(topicEx, "%s/%s", m_name.c_str(), topic);
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int rc = ::mosquitto_publish(m_mosq, NULL, topicEx, ::strlen(text), text, static_cast<int>(m_qos), false);
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if (rc != MOSQ_ERR_SUCCESS) {
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::fprintf(stderr, "MQTT Error publishing: %s\n", ::mosquitto_strerror(rc));
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return false;
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}
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return true;
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}
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void CMQTTPublisher::close()
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{
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if (m_mosq != NULL) {
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::mosquitto_disconnect(m_mosq);
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::mosquitto_destroy(m_mosq);
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m_mosq = NULL;
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}
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}
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void CMQTTPublisher::onConnect(mosquitto* mosq, void* obj, int rc)
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{
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assert(mosq != NULL);
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assert(obj != NULL);
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::fprintf(stdout, "MQTT: on_connect: %s\n", ::mosquitto_connack_string(rc));
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CMQTTPublisher* p = static_cast<CMQTTPublisher*>(obj);
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p->m_connected = true;
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}
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void CMQTTPublisher::onDisconnect(mosquitto* mosq, void* obj, int rc)
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{
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assert(mosq != NULL);
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assert(obj != NULL);
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::fprintf(stdout, "MQTT: on_disconnect: %s\n", ::mosquitto_reason_string(rc));
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CMQTTPublisher* p = static_cast<CMQTTPublisher*>(obj);
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p->m_connected = false;
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}
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