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85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/*
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Copyright (c) 2020-2021 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 2.0
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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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https://www.eclipse.org/legal/epl-2.0/
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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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SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
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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 "config.h"
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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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#define PLUGIN_NAME "message-timestamp"
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#define PLUGIN_VERSION "1.0"
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MOSQUITTO_PLUGIN_DECLARE_VERSION(5);
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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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UNUSED(event);
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UNUSED(userdata);
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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_init(mosquitto_plugin_id_t *identifier, void **user_data, struct mosquitto_opt *opts, int opt_count)
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{
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UNUSED(user_data);
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UNUSED(opts);
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UNUSED(opt_count);
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mosq_pid = identifier;
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mosquitto_plugin_set_info(identifier, PLUGIN_NAME, PLUGIN_VERSION);
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return mosquitto_callback_register(mosq_pid, MOSQ_EVT_MESSAGE_WRITE, callback_message, NULL, NULL);
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}
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/* mosquitto_plugin_cleanup() is optional in 2.1 and later. Use it only if you have your own cleanup to do */
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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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UNUSED(user_data);
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UNUSED(opts);
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UNUSED(opt_count);
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return MOSQ_ERR_SUCCESS;
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}
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