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/* -*- Mode: js; js-indent-level: 2; indent-tabs-mode: nil; tab-width: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
/* jshint esnext: true, moz: true */
'use strict';
this.EXPORTED_SYMBOLS = ['DNSRecord'];
const { utils: Cu } = Components;
Cu.import('resource://gre/modules/DataWriter.jsm');
Cu.import('resource://gre/modules/DNSTypes.jsm');
class DNSRecord {
constructor(properties = {}) {
this.name = properties.name || '';
this.recordType = properties.recordType || DNS_RECORD_TYPES.ANY;
this.classCode = properties.classCode || DNS_CLASS_CODES.IN;
this.cacheFlush = properties.cacheFlush || false;
}
static parseFromPacketReader(reader) {
let name = reader.getLabel();
let recordType = reader.getValue(2);
let classCode = reader.getValue(2);
let cacheFlush = (classCode & 0x8000) ? true : false;
classCode &= 0xff;
return new this({
name: name,
recordType: recordType,
classCode: classCode,
cacheFlush: cacheFlush
});
}
serialize() {
let writer = new DataWriter();
// Write `name` (ends with trailing 0x00 byte)
writer.putLabel(this.name);
// Write `recordType` (2 bytes)
writer.putValue(this.recordType, 2);
// Write `classCode` (2 bytes)
let classCode = this.classCode;
if (this.cacheFlush) {
classCode |= 0x8000;
}
writer.putValue(classCode, 2);
return writer.data;
}
toJSON() {
return JSON.stringify(this.toJSONObject());
}
toJSONObject() {
return {
name: this.name,
recordType: this.recordType,
classCode: this.classCode,
cacheFlush: this.cacheFlush
};
}
}
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