MeshCentral/mqttbroker.js

/**
* @description MQTT broker reference implementation based on AEDES
* @author Joko Banu Sastriawan
* @copyright Intel Corporation 2018-2019
* @license Apache-2.0
* @version v0.0.1
*/

module.exports.CreateMQTTBroker = function (parent, db, args) {
    
    // Internal objects container
    var obj = {}
    obj.parent = parent;
    obj.db = db;
    obj.args = args;
    obj.aedes = require("aedes")();
    
    // argument parsing -- tbd
    
    // event handling and filtering
    // authentication filter
    obj.aedes.authenticate = function (client, username, password, callback) {
        // TODO: add authentication handler
        obj.parent.debug("mqtt", "Authentication with " + username + ":" + password);
        callback(null, true);
    }
    
    // check if a client can publish a packet
    obj.aedes.authorizePublish = function (client, packet, callback) {
        // TODO: add authorized publish control
        obj.parent.debug("mqtt", "AuthorizePublish");
        callback(null);
    }
    
    // Check if a client can publish a packet
    obj.aedes.authorizeSubscribe = function (client, sub, callback) {
        // TODO: add subscription control here
        obj.parent.debug("mqtt", "AuthorizeSubscribe");
        callback(null, sub);
    }
    
    // Check if a client can publish a packet
    obj.aedes.authorizeForward = function (client, packet) {
        // TODO: add forwarding control
        obj.parent.debug("mqtt", "AuthorizeForward");
        return packet;
    }

    obj.handle = obj.aedes.handle;
    return obj;
}