forked from mirrors/gecko-dev
2c53a5dcd9
# ignore-this-changeset Differential Revision: https://phabricator.services.mozilla.com/D35919 --HG-- extra : source : afa5bd771feba466ba7670c58f3d93233a14e202
72 lines
1.8 KiB
JavaScript
72 lines
1.8 KiB
JavaScript
/* -*- Mode: js; js-indent-level: 2; indent-tabs-mode: nil; tab-width: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* jshint esnext: true, moz: true */
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"use strict";
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var EXPORTED_SYMBOLS = ["DNSRecord"];
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const { DataWriter } = ChromeUtils.import(
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"resource://gre/modules/DataWriter.jsm"
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);
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const { DNS_CLASS_CODES, DNS_RECORD_TYPES } = ChromeUtils.import(
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"resource://gre/modules/DNSTypes.jsm"
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);
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class DNSRecord {
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constructor(properties = {}) {
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this.name = properties.name || "";
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this.recordType = properties.recordType || DNS_RECORD_TYPES.ANY;
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this.classCode = properties.classCode || DNS_CLASS_CODES.IN;
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this.cacheFlush = properties.cacheFlush || false;
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}
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static parseFromPacketReader(reader) {
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let name = reader.getLabel();
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let recordType = reader.getValue(2);
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let classCode = reader.getValue(2);
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let cacheFlush = !!(classCode & 0x8000);
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classCode &= 0xff;
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return new this({
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name,
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recordType,
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classCode,
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cacheFlush,
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});
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}
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serialize() {
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let writer = new DataWriter();
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// Write `name` (ends with trailing 0x00 byte)
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writer.putLabel(this.name);
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// Write `recordType` (2 bytes)
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writer.putValue(this.recordType, 2);
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// Write `classCode` (2 bytes)
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let classCode = this.classCode;
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if (this.cacheFlush) {
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classCode |= 0x8000;
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}
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writer.putValue(classCode, 2);
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return writer.data;
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}
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toJSON() {
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return JSON.stringify(this.toJSONObject());
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}
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toJSONObject() {
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return {
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name: this.name,
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recordType: this.recordType,
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classCode: this.classCode,
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cacheFlush: this.cacheFlush,
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};
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}
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}
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