Send ssdp/mdns message regulairy via interval

[mStirner]

Some ssdp messages/quires need to be send regulary.
Related: mdns

[mStirner]

Add a .send()/.query() method to allow plugins to call it?
(If so, it need to be debounced, to send the request to frequently)

[mStirner]

Add service type like _http._tcp for query's in mdns and then lets the wildcard filter (shelly*.local) do its job.
This way you get all shelly devices because they respond to the service type request.

Evaluate for ssdp.

[mStirner]

Draft for mdns

router.api.mdns.js

    C_MDNS.events.on("query", (item) => {

        let query = encode({
            type: "query",
            id: 1,
            flags: RECURSION_DESIRED,
            questions: [{
                type: item.type,
                name: item.name
            }]
        });

        wss.clients.forEach((client) => {
            if (client.readyState === WebSocket.OPEN) {
                client.send(query);
            }
        });

    });

class.mdns.js

    static schema() {
        return Joi.object({
            _id: Joi.string().pattern(/^[0-9a-fA-F]{24}$/).default(() => {
                return String(new mongodb.ObjectId());
            }),
            name: Joi.string().required(),
            type: Joi.string().valid("SRV", "PTR", "A", "AAAA").default("A"),
            services: Joi.array().items(Joi.string().valid("_http._tcp")),
            timestamps: {
                announced: Joi.number().allow(null).default(null)
            }
        });
    }

    static validate(data) {
        return MDNS.schema().validate(data);
    }

    match(cb) {
        this._matches.push(cb);
    }

    query() {

        let { events, logger } = MDNS.scope;

        logger.debug("Query record", this);
        events.emit("query", this);

    }