#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <mosquitto.h>
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#include <mqtt_protocol.h>
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static int run = -1;
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static int sent_mid = -1;
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void on_connect(struct mosquitto *mosq, void *obj, int rc)
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{
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if(rc){
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exit(1);
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}else{
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mosquitto_subscribe(mosq, NULL, "request/topic", 0);
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}
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}
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void on_message_v5(struct mosquitto *mosq, void *obj, const struct mosquitto_message *msg, const mosquitto_property *props)
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{
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const mosquitto_property *p_resp, *p_corr = NULL;
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char *resp_topic = NULL;
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int rc;
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if(!strcmp(msg->topic, "request/topic")){
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p_resp = mosquitto_property_read_string(props, MQTT_PROP_RESPONSE_TOPIC, &resp_topic, false);
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if(p_resp){
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p_corr = mosquitto_property_read_binary(props, MQTT_PROP_CORRELATION_DATA, NULL, NULL, false);
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rc = mosquitto_publish_v5(mosq, NULL, resp_topic, strlen("a response"), "a response", 0, false, p_corr);
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free(resp_topic);
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}
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}
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}
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void on_publish(struct mosquitto *mosq, void *obj, int mid)
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{
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run = 0;
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}
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int main(int argc, char *argv[])
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{
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int rc;
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struct mosquitto *mosq;
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int ver = PROTOCOL_VERSION_v5;
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int port = atoi(argv[1]);
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mosquitto_lib_init();
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mosq = mosquitto_new("response-test", true, NULL);
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mosquitto_opts_set(mosq, MOSQ_OPT_PROTOCOL_VERSION, &ver);
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mosquitto_connect_callback_set(mosq, on_connect);
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mosquitto_publish_callback_set(mosq, on_publish);
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mosquitto_message_v5_callback_set(mosq, on_message_v5);
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rc = mosquitto_connect(mosq, "localhost", port, 60);
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while(run == -1){
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rc = mosquitto_loop(mosq, -1, 1);
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}
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mosquitto_lib_cleanup();
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return run;
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}
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