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// SPDX-License-Identifier: GPL-3.0-or-later
#include <libnetdata/json/json.h>
#include "../daemon/common.h"
#include "mqtt.h"
#include "aclk_lws_wss_client.h"
void (*_on_connect)(void *ptr) = NULL;
void (*_on_disconnect)(void *ptr) = NULL;
#ifndef ENABLE_ACLK
inline const char *_link_strerror(int rc)
{
UNUSED(rc);
return "no error";
}
int _link_event_loop(int timeout)
{
UNUSED(timeout);
return 0;
}
int _link_send_message(char *topic, char *message, int *mid)
{
UNUSED(topic);
UNUSED(message);
UNUSED(mid);
return 0;
}
int _link_subscribe(char *topic, int qos)
{
UNUSED(topic);
UNUSED(qos);
return 0;
}
void _link_shutdown()
{
return;
}
int _link_lib_init(char *aclk_hostname, int aclk_port, void (*on_connect)(void *), void (*on_disconnect)(void *))
{
UNUSED(aclk_hostname);
UNUSED(aclk_port);
UNUSED(on_connect);
UNUSED(on_disconnect);
return 0;
}
#else
struct mosquitto *mosq = NULL;
// Get a string description of the error
inline const char *_link_strerror(int rc)
{
return mosquitto_strerror(rc);
}
void mqtt_message_callback(struct mosquitto *mosq, void *obj, const struct mosquitto_message *msg)
{
UNUSED(mosq);
UNUSED(obj);
aclk_handle_cloud_request(msg->payload);
}
// This is not define because in future we might want to try plain
// MQTT as fallback ?
// e.g. try 1st MQTT-WSS, 2nd MQTT plain, 3rd https fallback...
int mqtt_over_websockets = 1;
struct aclk_lws_wss_engine_instance *lws_engine_instance = NULL;
void publish_callback(struct mosquitto *mosq, void *obj, int rc)
{
UNUSED(mosq);
UNUSED(obj);
UNUSED(rc);
// TODO: link this with a msg_id so it can be traced
return;
}
void connect_callback(struct mosquitto *mosq, void *obj, int rc)
{
UNUSED(obj);
UNUSED(rc);
info("Connection to cloud estabilished");
aclk_mqtt_connected = 1;
_on_connect((void *)mosq);
return;
}
void disconnect_callback(struct mosquitto *mosq, void *obj, int rc)
{
UNUSED(obj);
UNUSED(rc);
info("Connection to cloud failed");
aclk_mqtt_connected = 0;
_on_disconnect((void *)mosq);
if (mqtt_over_websockets && lws_engine_instance)
aclk_lws_wss_mqtt_layer_disconect_notif(lws_engine_instance);
return;
}
void _show_mqtt_info()
{
int libmosq_major, libmosq_minor, libmosq_revision, libmosq_version;
libmosq_version = mosquitto_lib_version(&libmosq_major, &libmosq_minor, &libmosq_revision);
info(
"Detected libmosquitto library version %d, %d.%d.%d", libmosq_version, libmosq_major, libmosq_minor,
libmosq_revision);
}
size_t _mqtt_external_write_hook(void *buf, size_t count)
{
return aclk_lws_wss_client_write(lws_engine_instance, buf, count);
}
size_t _mqtt_external_read_hook(void *buf, size_t count)
{
return aclk_lws_wss_client_read(lws_engine_instance, buf, count);
}
int _mqtt_lib_init(void (*on_connect)(void *), void (*on_disconnect)(void *))
{
int rc;
int libmosq_major, libmosq_minor, libmosq_revision, libmosq_version;
char *ca_crt;
char *server_crt;
char *server_key;
// show library info so can have it in the logfile
libmosq_version = mosquitto_lib_version(&libmosq_major, &libmosq_minor, &libmosq_revision);
ca_crt = config_get(CONFIG_SECTION_ACLK, "agent cloud link cert", "*");
server_crt = config_get(CONFIG_SECTION_ACLK, "agent cloud link server cert", "*");
server_key = config_get(CONFIG_SECTION_ACLK, "agent cloud link server key", "*");
if (ca_crt[0] == '*') {
freez(ca_crt);
ca_crt = NULL;
}
if (server_crt[0] == '*') {
freez(server_crt);
server_crt = NULL;
}
if (server_key[0] == '*') {
freez(server_key);
server_key = NULL;
}
// info(
// "Detected libmosquitto library version %d, %d.%d.%d", libmosq_version, libmosq_major, libmosq_minor,
// libmosq_revision);
rc = mosquitto_lib_init();
if (unlikely(rc != MOSQ_ERR_SUCCESS)) {
error("Failed to initialize MQTT (libmosquitto library)");
return 1;
}
mosq = mosquitto_new("anon", true, NULL);
if (unlikely(!mosq)) {
mosquitto_lib_cleanup();
error("MQTT new structure -- %s", mosquitto_strerror(errno));
return 1;
}
_on_connect = on_connect;
_on_disconnect = on_disconnect;
mosquitto_connect_callback_set(mosq, connect_callback);
mosquitto_disconnect_callback_set(mosq, disconnect_callback);
mosquitto_publish_callback_set(mosq, publish_callback);
mosquitto_username_pw_set(mosq, NULL, NULL);
rc = mosquitto_threaded_set(mosq, 1);
if (unlikely(rc != MOSQ_ERR_SUCCESS))
error("Failed to tune the thread model for libmoquitto (%s)", mosquitto_strerror(rc));
#if defined(LIBMOSQUITTO_VERSION_NUMBER) >= 1006000
rc = mosquitto_int_option(mosq, MQTT_PROTOCOL_V311, 0);
if (unlikely(rc != MOSQ_ERR_SUCCESS))
error("MQTT protocol specification rc = %d (%s)", rc, mosquitto_strerror(rc));
rc = mosquitto_int_option(mosq, MOSQ_OPT_SEND_MAXIMUM, 1);
info("MQTT in flight messages set to 1 -- %s", mosquitto_strerror(rc));
#endif
if (!mqtt_over_websockets) {
rc = mosquitto_reconnect_delay_set(mosq, ACLK_RECONNECT_DELAY, ACLK_MAX_BACKOFF_DELAY, 1);
if (unlikely(rc != MOSQ_ERR_SUCCESS))
error("Failed to set the reconnect delay (%d) (%s)", rc, mosquitto_strerror(rc));
mosquitto_tls_set(mosq, ca_crt, NULL, server_crt, server_key, NULL);
}
return rc;
}
int _link_mqtt_connect(char *aclk_hostname, int aclk_port)
{
int rc;
rc = mosquitto_connect_async(mosq, aclk_hostname, aclk_port, ACLK_PING_INTERVAL);
if (unlikely(rc != MOSQ_ERR_SUCCESS))
error(
"Failed to establish link to [%s:%d] MQTT status = %d (%s)", aclk_hostname, aclk_port, rc,
mosquitto_strerror(rc));
else
info("Establishing MQTT link to [%s:%d]", aclk_hostname, aclk_port);
return rc;
}
static inline void _link_mosquitto_write()
{
int rc;
if (!mqtt_over_websockets)
return;
rc = mosquitto_loop_misc(mosq);
if (unlikely(rc != MOSQ_ERR_SUCCESS))
debug(D_ACLK, "ACLK: failure during mosquitto_loop_misc %s", mosquitto_strerror(rc));
if (likely(mosquitto_want_write(mosq))) {
rc = mosquitto_loop_write(mosq, 1);
if (rc != MOSQ_ERR_SUCCESS)
debug(D_ACLK, "ACLK: failure during mosquitto_loop_write %s", mosquitto_strerror(rc));
}
}
void aclk_lws_connect_notif_callback()
{
//the connection is done by LWS so this parameters dont matter
//ig MQTT over LWS is used
_link_mqtt_connect(aclk_hostname, aclk_port);
_link_mosquitto_write();
}
void aclk_lws_data_received_callback()
{
int rc = mosquitto_loop_read(mosq, 1);
if
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