lib/transport.js
'use strict';
const createSocket = require('dgram').createSocket;
const EventEmitter = require('events').EventEmitter;
class Transport extends EventEmitter {
constructor(settings) {
super();
this._settings = settings;
this._server = createSocket({type: 'udp4', reuseAddr: true});
this._server.on('message', (msg, rinfo) => this.emit('message', msg, rinfo.address));
this._server.on('error', (err) => this.emit('message', err));
}
getBroadcastAddress() {
return this._settings.broadcastAddress;
}
getMaxPayload() {
return 1482;
}
send(buffer, offset, receiver) {
this._server.send(buffer, 0, offset, this._settings.port, receiver);
}
open() {
this._server.bind(this._settings.port, this._settings.interface, () => {
this._server.setBroadcast(true);
});
}
close() {
this._server.close();
}
}
module.exports = Transport;