2021-01-12 22:51:33 +00:00
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/*
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Copyright (c) 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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2021-10-05 14:20:37 +00:00
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2021-01-12 22:51:33 +00:00
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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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2021-10-05 14:20:37 +00:00
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2021-01-12 22:51:33 +00:00
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SPDX-License-Identifier: EPL-2.0 OR EDL-1.0
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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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* This is an example plugin showing how to use the basic authentication
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* callback to allow/disallow client connections based on client IP addresses.
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*
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* This is an extremely basic type of access control, password based or similar
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* authentication is preferred.
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*
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* Compile with:
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* gcc -I<path to mosquitto-repo/include> -fPIC -shared mosquitto_auth_by_ip.c -o mosquitto_auth_by_ip.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_auth_by_ip.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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2021-03-21 09:17:53 +00:00
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#include "config.h"
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2021-01-12 22:51:33 +00:00
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#include <stdio.h>
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#include <string.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 basic_auth_callback(int event, void *event_data, void *userdata)
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{
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struct mosquitto_evt_basic_auth *ed = event_data;
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const char *ip_address;
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2021-03-21 09:17:53 +00:00
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UNUSED(event);
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UNUSED(userdata);
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2021-01-12 22:51:33 +00:00
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ip_address = mosquitto_client_address(ed->client);
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if(!strcmp(ip_address, "127.0.0.1")){
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/* Only allow connections from localhost */
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return MOSQ_ERR_SUCCESS;
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}else{
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return MOSQ_ERR_AUTH;
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}
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}
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int mosquitto_plugin_version(int supported_version_count, const int *supported_versions)
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{
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int i;
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for(i=0; i<supported_version_count; i++){
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if(supported_versions[i] == 5){
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return 5;
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}
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}
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return -1;
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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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2021-03-21 09:17:53 +00:00
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UNUSED(user_data);
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UNUSED(opts);
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UNUSED(opt_count);
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2021-01-12 22:51:33 +00:00
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mosq_pid = identifier;
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return mosquitto_callback_register(mosq_pid, MOSQ_EVT_BASIC_AUTH, basic_auth_callback, 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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2021-03-21 09:17:53 +00:00
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UNUSED(user_data);
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UNUSED(opts);
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UNUSED(opt_count);
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2021-01-12 22:51:33 +00:00
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return mosquitto_callback_unregister(mosq_pid, MOSQ_EVT_BASIC_AUTH, basic_auth_callback, NULL);
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}
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