diff options
Diffstat (limited to 'netwerk/dns/mdns/libmdns/fallback/DNSRecord.jsm')
-rw-r--r-- | netwerk/dns/mdns/libmdns/fallback/DNSRecord.jsm | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/netwerk/dns/mdns/libmdns/fallback/DNSRecord.jsm b/netwerk/dns/mdns/libmdns/fallback/DNSRecord.jsm new file mode 100644 index 000000000..f5d48731f --- /dev/null +++ b/netwerk/dns/mdns/libmdns/fallback/DNSRecord.jsm @@ -0,0 +1,70 @@ +/* -*- 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 + }; + } +} |