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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#include "common.h"
#include "player.h"
#include "rtsp.h"
#include "rtp.h"
#include "dacp.h"
#include "mqtt.h"
#include <mosquitto.h>
// this holds the mosquitto client
struct mosquitto *global_mosq = NULL;
char *topic = NULL;
int connected = 0;
// mosquitto logging
void _cb_log(__attribute__((unused)) struct mosquitto *mosq, __attribute__((unused)) void *userdata,
int level, const char *str) {
switch (level) {
case MOSQ_LOG_DEBUG:
debug(1, str);
break;
case MOSQ_LOG_INFO:
debug(2, str);
break;
case MOSQ_LOG_NOTICE:
debug(3, str);
break;
case MOSQ_LOG_WARNING:
inform(str);
break;
case MOSQ_LOG_ERR: {
die("MQTT: Error: %s\n", str);
}
}
}
// mosquitto message handler
void on_message(__attribute__((unused)) struct mosquitto *mosq,
__attribute__((unused)) void *userdata, const struct mosquitto_message *msg) {
// null-terminate the payload
char payload[msg->payloadlen + 1];
memcpy(payload, msg->payload, msg->payloadlen);
payload[msg->payloadlen] = 0;
debug(1, "[MQTT]: received Message on topic %s: %s\n", msg->topic, payload);
// All recognized commands
char *commands[] = {"command", "beginff", "beginrew", "mutetoggle", "nextitem",
"previtem", "pause", "playpause", "play", "stop",
"playresume", "shuffle_songs", "volumedown", "volumeup", NULL};
int it = 0;
// send command if it's a valid one
while (commands[it] != NULL) {
if ((size_t)msg->payloadlen >= strlen(commands[it]) &&
strncmp(msg->payload, commands[it], strlen(commands[it])) == 0) {
debug(1, "[MQTT]: DACP Command: %s\n", commands[it]);
send_simple_dacp_command(commands[it]);
break;
}
it++;
}
}
void on_disconnect(__attribute__((unused)) struct mosquitto *mosq,
__attribute__((unused)) void *userdata, __attribute__((unused)) int rc) {
connected = 0;
debug(1, "[MQTT]: disconnected");
}
void on_connect(struct mosquitto *mosq, __attribute__((unused)) void *userdata,
__attribute__((unused)) int rc) {
connected = 1;
debug(1, "[MQTT]: connected");
// subscribe if requested
if (config.mqtt_enable_remote) {
char remotetopic[strlen(config.mqtt_topic) + 8];
snprintf(remotetopic, strlen(config.mqtt_topic) + 8, "%s/remote", config.mqtt_topic);
mosquitto_subscribe(mosq, NULL, remotetopic, 0);
}
}
// helper function to publish under a topic and automatically append the main topic
void mqtt_publish(char *topic, char *data, uint32_t length) {
char fulltopic[strlen(config.mqtt_topic) + strlen(topic) + 3];
snprintf(fulltopic, strlen(config.mqtt_topic) + strlen(topic) + 2, "%s/%s", config.mqtt_topic,
topic);
debug(1, "[MQTT]: publishing under %s", fulltopic);
int rc;
if ((rc = mosquitto_publish(global_mosq, NULL, fulltopic, length, data, 0, 0)) !=
MOSQ_ERR_SUCCESS) {
switch (rc) {
case MOSQ_ERR_NO_CONN:
debug(1, "[MQTT]: Publish failed: not connected to broker");
break;
default:
debug(1, "[MQTT]: Publish failed: unknown error");
break;
}
}
}
// handler for incoming metadata
void mqtt_process_metadata(uint32_t type, uint32_t code, char *data, uint32_t length) {
if (global_mosq == NULL || connected != 1) {
debug(3, "[MQTT]: Client not connected, skipping metadata handling");
return;
}
if (config.mqtt_publish_raw) {
uint32_t val;
char topic[] = "____/____";
val = htonl(type);
memcpy(topic, &val, 4);
val = htonl(code);
memcpy(topic + 5, &val, 4);
mqtt_publish(topic, data, length);
}
if (config.mqtt_publish_parsed) {
if (type == 'core') {
switch (code) {
case 'asar':
mqtt_publish("artist", data, length);
break;
case 'asal':
mqtt_publish("album", data, length);
break;
case 'minm':
mqtt_publish("title", data, length);
break;
case 'asgn':
mqtt_publish("genre", data, length);
break;
case 'asfm':
mqtt_publish("format", data, length);
break;
}
} else if (type == 'ssnc') {
switch (code) {
case 'asal':
mqtt_publish("songalbum", data, length);
break;
case 'pvol':
mqtt_publish("volume", data, length);
break;
case 'clip':
mqtt_publish("client_ip", data, length);
break;
case 'abeg':
mqtt_publish("active_start", data, length);
break;
case 'aend':
mqtt_publish("active_end", data, length);
break;
case 'pbeg':
mqtt_publish("play_start", data, length);
break;
case 'pend':
mqtt_publish("play_end", data, length);
break;
case 'pfls':
mqtt_publish("play_flush", data, length);
break;
case 'prsm':
mqtt_publish("play_resume", data, length);
break;
case 'PICT':
if (config.mqtt_publish_cover) {
mqtt_publish("cover", data, length);
}
break;
}
}
}
return;
}
int initialise_mqtt() {
debug(1, "Initialising MQTT");
if (config.mqtt_hostname == NULL) {
debug(1, "[MQTT]: Not initialized, as the hostname is not set");
return 0;
}
int keepalive = 60;
mosquitto_lib_init();
if (!(global_mosq = mosquitto_new(config.service_name, true, NULL))) {
die("[MQTT]: FATAL: Could not create mosquitto object! %d\n", global_mosq);
}
if (config.mqtt_cafile != NULL || config.mqtt_capath != NULL || config.mqtt_certfile != NULL ||
config.mqtt_keyfile != NULL) {
if (mosquitto_tls_set(global_mosq, config.mqtt_cafile, config.mqtt_capath, config.mqtt_certfile,
config.mqtt_keyfile, NULL) != MOSQ_ERR_SUCCESS) {
die("[MQTT]: TLS Setup failed");
}
}
if (config.mqtt_username != NULL || config.mqtt_password != NULL) {
if (mosquitto_username_pw_set(global_mosq, config.mqtt_username, config.mqtt_password) !=
MOSQ_ERR_SUCCESS) {
die("[MQTT]: Username/Password set failed");
}
}
mosquitto_log_callback_set(global_mosq, _cb_log);
if (config.mqtt_enable_remote) {
mosquitto_message_callback_set(global_mosq, on_message);
}
mosquitto_disconnect_callback_set(global_mosq, on_disconnect);
mosquitto_connect_callback_set(global_mosq, on_connect);
if (mosquitto_connect(global_mosq, config.mqtt_hostname, config.mqtt_port, keepalive)) {
inform("[MQTT]: Could not establish a mqtt connection");
}
if (mosquitto_loop_start(global_mosq) != MOSQ_ERR_SUCCESS) {
inform("[MQTT]: Could start MQTT Main loop");
}
return 0;
}
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