70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/*
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Copyright (c) 2020 Roger Light <roger@atchoo.org>
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All rights reserved. This program and the accompanying materials
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are made available under the terms of the Eclipse Public License v1.0
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and Eclipse Distribution License v1.0 which accompany this distribution.
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The Eclipse Public License is available at
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http://www.eclipse.org/legal/epl-v10.html
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and the Eclipse Distribution License is available at
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http://www.eclipse.org/org/documents/edl-v10.php.
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Contributors:
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Roger Light - initial implementation and documentation.
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*/
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/*
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* Add an MQTT v5 user-property with key "timestamp" and value of timestamp in ISO-8601 format to all messages.
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*
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* Compile with:
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* gcc -I<path to mosquitto-repo/include> -fPIC -shared mosquitto_timestamp.c -o mosquitto_timestamp.so
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*
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* Use in config with:
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*
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* plugin /path/to/mosquitto_timestamp.so
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*
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* Note that this only works on Mosquitto 2.0 or later.
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*/
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#include <stdio.h>
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#include <time.h>
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#include "mosquitto_broker.h"
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#include "mosquitto_plugin.h"
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#include "mosquitto.h"
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#include "mqtt_protocol.h"
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static mosquitto_plugin_id_t *mosq_pid = NULL;
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static int callback_message(int event, void *event_data, void *userdata)
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{
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struct mosquitto_evt_message *ed = event_data;
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struct timespec ts;
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struct tm *ti;
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char time_buf[25];
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clock_gettime(CLOCK_REALTIME, &ts);
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ti = gmtime(&ts.tv_sec);
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strftime(time_buf, sizeof(time_buf), "%Y-%m-%dT%H:%M:%SZ", ti);
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return mosquitto_property_add_string_pair(&ed->properties, MQTT_PROP_USER_PROPERTY, "timestamp", time_buf);
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}
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int mosquitto_plugin_version(void)
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{
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return 5;
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}
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int mosquitto_plugin_init(mosquitto_plugin_id_t *identifier, void **user_data, struct mosquitto_opt *opts, int opt_count)
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{
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mosq_pid = identifier;
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return mosquitto_callback_register(mosq_pid, MOSQ_EVT_MESSAGE, callback_message, NULL, NULL);
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}
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int mosquitto_plugin_cleanup(void *user_data, struct mosquitto_opt *opts, int opt_count)
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{
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return mosquitto_callback_unregister(mosq_pid, MOSQ_EVT_MESSAGE, callback_message, NULL);
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}
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