115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
|
|
* mqtt subscribe
|
|
*
|
|
* @build make examples
|
|
* @sub bin/mqtt_sub 127.0.0.1 1883 topic
|
|
* @pub bin/mqtt_pub 127.0.0.1 1883 topic payload
|
|
*
|
|
*/
|
|
|
|
#include "hv.h"
|
|
#include "mqtt_client.h"
|
|
|
|
/*
|
|
* @test MQTTS
|
|
* #define TEST_SSL 1
|
|
*
|
|
* @build ./configure --with-mqtt --with-openssl && make clean && make
|
|
*
|
|
*/
|
|
#define TEST_SSL 0
|
|
#define TEST_AUTH 0
|
|
#define TEST_RECONNECT 1
|
|
|
|
/*
|
|
* workflow:
|
|
* mqtt_client_new -> mqtt_client_xxx -> mqtt_client_run
|
|
*
|
|
* mqtt_client_set_xxx ->
|
|
* mqtt_client_connect ->
|
|
* on_connack -> mqtt_client_subscribe ->
|
|
* on_publish -> handle_message
|
|
*
|
|
*/
|
|
|
|
static void handle_message(mqtt_client_t* cli, mqtt_message_t* msg) {
|
|
printf("topic: %.*s\n", msg->topic_len, msg->topic);
|
|
printf("payload: %.*s\n", msg->payload_len, msg->payload);
|
|
}
|
|
|
|
static void on_mqtt(mqtt_client_t* cli, int type) {
|
|
printf("on_mqtt type=%d\n", type);
|
|
switch(type) {
|
|
case MQTT_TYPE_CONNECT:
|
|
printf("mqtt connected!\n");
|
|
if (cli->reconn_setting && cli->reconn_setting->cur_retry_cnt > 0) {
|
|
printf("mqtt reconnect cnt=%d, delay=%d\n", cli->reconn_setting->cur_retry_cnt, cli->reconn_setting->cur_delay);
|
|
}
|
|
break;
|
|
case MQTT_TYPE_DISCONNECT:
|
|
printf("mqtt disconnected!\n");
|
|
if (cli->reconn_setting && cli->reconn_setting->cur_retry_cnt > 0) {
|
|
printf("mqtt reconnect cnt=%d, delay=%d\n", cli->reconn_setting->cur_retry_cnt, cli->reconn_setting->cur_delay);
|
|
}
|
|
break;
|
|
case MQTT_TYPE_CONNACK:
|
|
printf("mqtt connack!\n");
|
|
{
|
|
const char* topic = (const char*)mqtt_client_get_userdata(cli);
|
|
int mid = mqtt_client_subscribe(cli, topic, 0);
|
|
printf("mqtt subscribe mid=%d\n", mid);
|
|
}
|
|
break;
|
|
case MQTT_TYPE_SUBACK:
|
|
printf("mqtt suback mid=%d\n", cli->mid);
|
|
break;
|
|
case MQTT_TYPE_PUBLISH:
|
|
handle_message(cli, &cli->message);
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int mqtt_subscribe(const char* host, int port, const char* topic) {
|
|
mqtt_client_t* cli = mqtt_client_new(NULL);
|
|
if (cli == NULL) return -1;
|
|
cli->keepalive = 10;
|
|
|
|
#if TEST_AUTH
|
|
mqtt_client_set_auth(cli, "test", "123456");
|
|
#endif
|
|
|
|
mqtt_client_set_userdata(cli, (void*)topic);
|
|
mqtt_client_set_callback(cli, on_mqtt);
|
|
|
|
#if TEST_RECONNECT
|
|
reconn_setting_t reconn;
|
|
reconn_setting_init(&reconn);
|
|
reconn.min_delay = 1000;
|
|
reconn.max_delay = 10000;
|
|
reconn.delay_policy = 2;
|
|
mqtt_client_set_reconnect(cli, &reconn);
|
|
#endif
|
|
|
|
int ssl = 0;
|
|
#if TEST_SSL
|
|
ssl = 1;
|
|
#endif
|
|
mqtt_client_connect(cli, host, port, ssl);
|
|
mqtt_client_run(cli);
|
|
mqtt_client_free(cli);
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char** argv) {
|
|
if (argc < 4) {
|
|
printf("Usage: %s host port topic\n", argv[0]);
|
|
return -10;
|
|
}
|
|
const char* host = argv[1];
|
|
int port = atoi(argv[2]);
|
|
const char* topic = argv[3];
|
|
|
|
return mqtt_subscribe(host, port, topic);
|
|
}
|