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/*
* Copyright (C) 2019,2024 Konsulko Group
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <iostream>
#include <cstring>
#include "MqttClient.h"
#include "GlobalConfig.h"
MqttClient::MqttClient(const MqttConfig &config) :
m_config(config)
{
mosquitto_lib_init();
m_mosq = mosquitto_new(m_config.clientId().c_str(), m_config.cleanOnDisconnect(), this);
mosquitto_connect_callback_set(m_mosq, onConnect);
mosquitto_disconnect_callback_set(m_mosq, onDisconnect);
if(m_config.username().size()) {
mosquitto_username_pw_set(m_mosq,
m_config.username().c_str(),
m_config.password().c_str());
}
m_loop = mosquitto_loop_start(m_mosq);
if(m_loop != MOSQ_ERR_SUCCESS){
std::cerr << __FUNCTION__ << ": Unable to start loop, error = " << m_loop << std::endl;
}
}
bool MqttClient::start()
{
if (!(m_mosq && m_loop == MOSQ_ERR_SUCCESS))
return false;
if (!(m_config.username().empty() || m_config.password().empty())) {
std::cout << "Using MQTT username & password" << std::endl;
if (mosquitto_username_pw_set(m_mosq,
m_config.username().c_str(),
m_config.password().c_str()) != MOSQ_ERR_SUCCESS) {
return false;
}
}
if (m_config.useTls() && !m_config.caCertFile().empty()) {
std::cout << "Using MQTT TLS server certificate" << std::endl;
char *clientCertFile = NULL;
char *clientKeyFile = NULL;
if (!(m_config.clientCertFile().empty() || m_config.clientKeyFile().empty())) {
clientCertFile = strdup(m_config.clientCertFile().c_str());
clientKeyFile = strdup(m_config.clientKeyFile().c_str());
std::cout << "Using MQTT TLS client certificate" << std::endl;
}
if (mosquitto_tls_set(m_mosq,
m_config.caCertFile().c_str(),
NULL,
clientCertFile,
clientKeyFile,
NULL) != MOSQ_ERR_SUCCESS) {
std::cerr << "Error configuring MQTT TLS support" << std::endl;
free(clientCertFile);
free(clientKeyFile);
return false;
}
if (!m_config.verifyServerHostname()) {
if (mosquitto_tls_insecure_set(m_mosq, true) != MOSQ_ERR_SUCCESS) {
return false;
}
}
}
bool rc = true;
std::cout << "Using MQTT server " << m_config.hostname() << ":" << m_config.port() << std::endl;
if(mosquitto_connect_async(m_mosq,
m_config.hostname().c_str(),
m_config.port(),
m_config.keepalive())) {
std::cerr << "Unable to start MQTT connection to " << m_config.hostname() << std::endl;
rc = false;
}
return rc;
}
MqttClient::~MqttClient(void)
{
mosquitto_disconnect(m_mosq);
mosquitto_loop_stop(m_mosq, true);
mosquitto_destroy(m_mosq);
mosquitto_lib_cleanup();
}
int MqttClient::publish(const std::string &topic, const char *data, const int len, const unsigned qos, const bool retain)
{
if (len <= 0 || qos > 2)
return -1;
return mosquitto_publish(m_mosq,
NULL,
topic.c_str(),
len,
data,
qos,
retain);
}
int MqttClient::publish(const std::string &topic, const char *data, const int len)
{
if (len <= 0)
return -1;
return mosquitto_publish(m_mosq,
NULL,
topic.c_str(),
len,
data,
m_config.qos(),
m_config.retain());
}
int MqttClient::publish(const char *data, const int len)
{
if (len <= 0)
return -1;
return mosquitto_publish(m_mosq,
NULL,
m_config.topic().c_str(),
len,
data,
m_config.qos(),
m_config.retain());
}
// Private
void MqttClient::onConnect(struct mosquitto *mosq, void *obj, int rc)
{
if (!obj)
return;
MqttClient *p = (MqttClient*) obj;
p->handleConnect(rc);
}
void MqttClient::onDisconnect(struct mosquitto *mosq, void *obj, int rc)
{
if (!obj)
return;
MqttClient *p = (MqttClient*) obj;
p->handleDisconnect(rc);
}
void MqttClient::handleConnect(int rc)
{
m_connected = true;
if (g_config.verbose())
std::cerr << "MQTT Connected, rc = " << rc << std::endl;
}
void MqttClient::handleDisconnect(int rc)
{
m_connected = false;
if (g_config.verbose())
std::cerr << "MQTT Disconnected, rc = " << rc << std::endl;
}
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