/*********************************************************************************
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* Copyright: (C) 2019 LingYun IoT System Studio
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* All rights reserved.
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*
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* Filename: main.c
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* Description: This file
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*
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* Version: 1.0.0(29/01/19)
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* Author: Guo Wenxue <guowenxue@gmail.com>
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* ChangeLog: 1, Release initial version on "29/01/19 15:34:41"
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*
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********************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include <getopt.h>
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#include <libgen.h>
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#include <string.h>
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#include <errno.h>
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#include <mosquitto.h>
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#include <cjson/cJSON.h>
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#include "logger.h"
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#include "util_proc.h"
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#include "modules.h"
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#include "conf.h"
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#define PROG_VERSION "v1.0.0"
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#define DAEMON_PIDFILE "/tmp/.mqtt.pid"
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void *mqtt_sub_worker(void *args);
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void *mqtt_pub_worker(void *args);
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static void program_usage(char *progname)
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{
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printf("Usage: %s [OPTION]...\n", progname);
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printf(" %s is LingYun studio MQTT daemon program running on RaspberryPi\n", progname);
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printf("\nMandatory arguments to long options are mandatory for short options too:\n");
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printf(" -d[debug ] Running in debug mode\n");
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printf(" -c[conf ] Specify configure file\n");
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printf(" -h[help ] Display this help information\n");
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printf(" -v[version ] Display the program version\n");
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printf("\n%s version %s\n", progname, PROG_VERSION);
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return;
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}
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int main (int argc, char **argv)
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{
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int daemon = 1;
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pthread_t tid;
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mqtt_ctx_t ctx;
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char *conf_file=NULL;
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int debug = 0;
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int opt;
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char *progname=NULL;
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struct option long_options[] = {
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{"conf", required_argument, NULL, 'c'},
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{"debug", no_argument, NULL, 'd'},
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{"version", no_argument, NULL, 'v'},
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{"help", no_argument, NULL, 'h'},
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{NULL, 0, NULL, 0}
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};
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progname = (char *)basename(argv[0]);
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/* Parser the command line parameters */
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while ((opt = getopt_long(argc, argv, "c:dvh", long_options, NULL)) != -1)
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{
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switch (opt)
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{
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case 'c': /* Set configure file */
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conf_file = optarg;
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break;
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case 'd': /* Set debug running */
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daemon = 0;
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debug = 1;
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break;
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case 'v': /* Get software version */
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printf("%s version %s\n", progname, PROG_VERSION);
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return 0;
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case 'h': /* Get help information */
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program_usage(progname);
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return 0;
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default:
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break;
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}
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}
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if( !conf_file )
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debug = 1;
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if( mqttd_parser_conf(conf_file, &ctx, debug)<0 )
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{
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fprintf(stderr, "Parser mqtted configure file failure\n");
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return -2;
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}
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install_default_signal();
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if( check_set_program_running(daemon, DAEMON_PIDFILE) < 0 )
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goto cleanup;
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mosquitto_lib_init();
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if( thread_start(&tid, mqtt_sub_worker, &ctx ) < 0 )
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{
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log_error("Start MQTT subsciber worker thread failure\n");
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goto cleanup;
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}
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log_info("Start MQTT subsciber worker thread ok\n");
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if( thread_start(&tid, mqtt_pub_worker, &ctx) < 0 )
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{
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log_error("Start MQTT publisher worker thread failure\n");
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goto cleanup;
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}
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log_info("Start MQTT publisher worker thread ok\n");
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while( ! g_signal.stop )
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{
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msleep(1000);
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}
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cleanup:
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mosquitto_lib_cleanup();
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log_close();
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return 0;
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} /* ----- End of main() ----- */
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void pub_connect_callback(struct mosquitto *mosq, void *userdata, int result)
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{
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mqtt_ctx_t *ctx = (mqtt_ctx_t *)userdata;
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int rv = 0;
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char msg[128];
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float temp = 0.0; /* temperature */
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float rh = 0.0; /* relative humidity */
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int retain = 0;
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if( result )
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{
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log_error("Publisher connect to broker server[%s:%d] failed, rv=%d\n", ctx->host, ctx->port, result);
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return ;
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}
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log_info("Publisher connect to broker server[%s:%d] successfully\n", ctx->host, ctx->port);
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log_debug("Publish topic '%s'\n", ctx->pubTopic);
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if( ctx->hwconf.ds18b20 )
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{
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memset(msg, 0, sizeof(msg));
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log_debug("DS18B20 temperature sensor enabled, start broadcast it\n");
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if( ds18b20_get_temperature(&temp) < 0 )
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snprintf(msg, sizeof(msg), "{ \"id\":%s, \"temp\":\"error\" }", ctx->devid);
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else
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snprintf(msg, sizeof(msg), "{ \"id\":%s, \"temp\":\"%.2f\" }", ctx->devid, temp);
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rv = mosquitto_publish(mosq, NULL, ctx->pubTopic, strlen(msg), msg, ctx->pubQos, retain);
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if( rv )
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{
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log_error("Publisher broadcast message '%s' failure: %d\n", msg, rv);
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}
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else
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{
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log_info("Publisher broadcast message '%s' ok\n", msg);
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}
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}
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if( ctx->hwconf.sht2x )
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{
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memset(msg, 0, sizeof(msg));
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log_debug("SHT2X temperature and humidity sensor enabled, start broadcast it\n");
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if( sht2x_get_temp_humidity(&temp, &rh) < 0 )
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snprintf(msg, sizeof(msg), "{ \"id\":%s, \"temp\":\"error\", \"RH\":\"error\" }", ctx->devid);
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else
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snprintf(msg, sizeof(msg), "{ \"id\":%s, \"temp\":\"%.2f\", \"RH\":\"%.2f\" }", ctx->devid, temp, rh);
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rv = mosquitto_publish(mosq, NULL, ctx->pubTopic, strlen(msg), msg, ctx->pubQos, retain);
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if( rv )
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{
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log_error("Publisher broadcast message '%s' failure: %d\n", msg, rv);
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}
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else
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{
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log_info("Publisher broadcast message '%s' ok\n", msg);
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}
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}
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log_info("Publisher broadcast over and disconnect broker now\n", ctx->host, ctx->port);
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mosquitto_disconnect(mosq);
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return ;
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}
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void *mqtt_pub_worker(void *args)
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{
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mqtt_ctx_t *ctx = (mqtt_ctx_t *)args;
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struct mosquitto *mosq;
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bool session = true;
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mosq = mosquitto_new(NULL, session, ctx);
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if( !mosq )
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{
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log_error("mosquitto_new failure\n");
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return NULL;
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}
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/* set connnect to broker username and password */
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if( strlen(ctx->uid)> 0 && strlen(ctx->pwd)> 0 )
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mosquitto_username_pw_set(mosq, ctx->uid, ctx->pwd);
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/* set callback functions */
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mosquitto_connect_callback_set(mosq, pub_connect_callback);
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while( !g_signal.stop )
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{
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/* connect to MQTT broker */
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if( mosquitto_connect(mosq, ctx->host, ctx->port, ctx->keepalive) )
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{
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log_error("Publisher connect to broker[%s:%d] failure: %s\n", ctx->host, ctx->port, strerror(errno));
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msleep(1000);
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continue;
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}
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/* -1: use default timeout 1000ms 1: unused */
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mosquitto_loop_forever(mosq, -1, 1);
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/* Publisher broadcast sensors data message interval time, unit seconds */
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sleep( ctx->interval );
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}
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mosquitto_destroy(mosq);
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return NULL;
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}
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void sub_connect_callback(struct mosquitto *mosq, void *userdata, int result)
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{
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mqtt_ctx_t *ctx = (mqtt_ctx_t *)userdata;
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if( result )
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{
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log_error("Subscriber connect to broker server failed, rv=%d\n", result);
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return ;
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}
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log_info("Subscriber connect to broker server[%s:%d] successfully\n", ctx->host, ctx->port);
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mosquitto_subscribe(mosq, NULL, ctx->subTopic, ctx->subQos);
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}
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void sub_disconnect_callback(struct mosquitto *mosq, void *userdata, int result)
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{
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mqtt_ctx_t *ctx = (mqtt_ctx_t *)userdata;
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log_warn("Subscriber disconnect to broker server[%s:%d], reason=%d\n", ctx->host, ctx->port, result);
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}
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static inline void mqtt_turn_led(int which, char *cmd)
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{
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if( strcasestr(cmd, "on") )
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turn_led(which, ON);
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else if( strcasestr(cmd, "off") )
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turn_led(which, OFF);
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}
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void proc_json_items(cJSON *root, mqtt_ctx_t *ctx)
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{
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int i;
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char *value;
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cJSON *item;
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cJSON *array;
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hwconf_t *hwconf = &ctx->hwconf;
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if( !root )
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{
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log_error("Invalid input arguments $root\n");
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return ;
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}
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for( i=0; i<cJSON_GetArraySize(root); i++ )
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{
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item = cJSON_GetArrayItem(root, i);
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if( !item )
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break;
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/* if item is cJSON_Object, then recursive call proc_json */
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if( cJSON_Object == item->type )
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{
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proc_json_items(item, ctx);
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}
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else if( cJSON_Array == item->type )
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{
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/* RGB colors led control: {"id":"RPi3B#01", "leds":[{"red":"on","green":"off","blue":"on"}]} */
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if( hwconf->led && !strcasecmp(item->string, "leds") )
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{
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array = cJSON_GetArrayItem(item, 0);
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if( NULL != array )
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{
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cJSON *led_item;
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if( NULL != (led_item=cJSON_GetObjectItem(array , "red")) )
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{
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log_info("turn red led '%s'\n", led_item->valuestring);
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mqtt_turn_led(LED_R, led_item->valuestring);
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}
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if( NULL != (led_item=cJSON_GetObjectItem(array , "green")) )
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{
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log_info("turn green led '%s'\n", led_item->valuestring);
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mqtt_turn_led(LED_G, led_item->valuestring);
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}
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if( NULL != (led_item=cJSON_GetObjectItem(array , "blue")) )
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{
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log_info("turn blue led '%s'\n", led_item->valuestring);
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mqtt_turn_led(LED_B, led_item->valuestring);
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}
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}
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}
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}
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else
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{
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value = cJSON_Print(item);
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/* light controled by relay: {"id":"RPi3B#01", "light":"on"} */
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if( hwconf->relay && !strcasecmp(item->string, "light") )
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{
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if( strcasestr(value, "on") )
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{
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log_info("Turn light on\n");
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turn_relay(RELAY1, ON);
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}
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else if( strcasestr(value, "off") )
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{
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log_info("Turn light off\n");
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turn_relay(RELAY1, OFF);
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}
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}
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/* buzzer controled : {"id":"RPi3B#01", "buzzer":"on"} */
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if( hwconf->beeper && !strcasecmp(item->string, "buzzer") )
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{
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if( strcasestr(value, "on") )
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{
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turn_beep(3);
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}
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}
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free(value); /* must free it, or it will result memory leak */
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}
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}
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}
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void sub_message_callback(struct mosquitto *mosq, void *userdata, const struct mosquitto_message *message)
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{
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mqtt_ctx_t *ctx = (mqtt_ctx_t *)userdata;
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cJSON *root = NULL;
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cJSON *item;
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char *value;
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if ( !message->payloadlen )
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{
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log_error("%s (null)\n", message->topic);
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return ;
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}
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log_debug("Subscriber receive message: '%s'\n", message->payload);
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root = cJSON_Parse(message->payload);
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if( !root )
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{
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log_error("cJSON_Parse parser failure: %s\n", cJSON_GetErrorPtr());
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return ;
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}
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item = cJSON_GetObjectItem(root, "id");
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if( !item )
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{
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log_error("cJSON_Parse get ID failure: %s\n", cJSON_GetErrorPtr());
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goto cleanup;
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}
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value = cJSON_PrintUnformatted(item);
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if( strcasecmp(value, ctx->devid) )
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{
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free(value);
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goto cleanup;
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}
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free(value);
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log_info("Subscriber receive message: '%s'\n", message->payload);
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proc_json_items(root, ctx);
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cleanup:
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cJSON_Delete(root); /* must delete it, or it will result memory leak */
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return ;
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}
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void *mqtt_sub_worker(void *args)
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{
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mqtt_ctx_t *ctx = (mqtt_ctx_t *)args;
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struct mosquitto *mosq;
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bool session = true;
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mosq = mosquitto_new(NULL, session, ctx);
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if( !mosq )
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{
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log_error("mosquitto_new failure\n");
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return NULL;
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}
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/* set connnect to broker username and password */
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if( strlen(ctx->uid)> 0 && strlen(ctx->pwd)> 0 )
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mosquitto_username_pw_set(mosq, ctx->uid, ctx->pwd);
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/* set callback functions */
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mosquitto_connect_callback_set(mosq, sub_connect_callback);
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mosquitto_disconnect_callback_set(mosq, sub_disconnect_callback);
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mosquitto_message_callback_set(mosq, sub_message_callback);
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while( !g_signal.stop )
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{
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/* connect to MQTT broker */
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if( mosquitto_connect(mosq, ctx->host, ctx->port, ctx->keepalive) )
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{
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log_error("Subscriber connect to broker[%s:%d] failure: %s\n", ctx->host, ctx->port, strerror(errno));
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msleep(1000);
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continue;
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}
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/* -1: use default timeout 1000ms 1: unused */
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mosquitto_loop_forever(mosq, -1, 1);
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}
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mosquitto_destroy(mosq);
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return NULL;
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}
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