changed examples to use `dns-suite` instead of `dns-js`
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@ -37,6 +37,11 @@ var dnspack = exports.DNS_PACKER = {
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if (!r.className) {
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throw new Error("no className");
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}
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if (!classes[r.className]) {
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console.warn("ignoring invalid class '" + r.className + "' for '" + r.name);
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} else {
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r.class = classes[r.className];
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}
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}
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if (!r.type) {
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@ -44,7 +49,9 @@ var dnspack = exports.DNS_PACKER = {
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throw new Error("no typeName");
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}
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if (!types[r.typeName]) {
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console.warn("ignoring invalid type '" + r.type + "' for '" + r.name + "', ignoring");
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console.warn("ignoring invalid type '" + r.typeName + "' for '" + r.name);
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} else {
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r.type = types[r.typeName];
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}
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}
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}
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@ -1,20 +1,44 @@
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'use strict';
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module.exports.respond = function (socket, packets, rinfo) {
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var dns = require('dns-js');
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var dns = require('../');
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var os = require('os');
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var queryname = '_cloud._tcp.local';
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console.log(packets);
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packets.forEach(function (packet) {
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// Only respond to queries, otherwise we'll end up responding to ourselves forever.
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if (packet.header.qr !== 0) {
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return;
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}
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packet.question.forEach(function (q) {
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if (queryname !== q.name) {
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return;
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}
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console.log('question', q.name, q.typeName, q.className, q.flag, q);
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var rpacket = new dns.DNSPacket();
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var rpacket = {
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header: {
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id: packet.header.id
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, qr: 1
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, opcode: 0
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, aa: 1
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, tc: 0
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, rd: 0
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, ra: 0
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, res1: 0
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, res2: 0
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, res3: 0
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, rcode: 0
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, }
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, question: [q]
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, answer: []
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, authority: []
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, additional: []
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, edns_options: []
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};
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var ifaces = os.networkInterfaces();
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//var llRe = /^(fe80|169)/i; // link-local
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@ -29,9 +53,9 @@ module.exports.respond = function (socket, packets, rinfo) {
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iface.forEach(function (pface) {
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rpacket.additional.push({
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name: q.name
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, type: ('IPv4' === pface.family ? dns.DNSRecord.Type.A : dns.DNSRecord.Type.AAAA)
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, typeName: ('IPv4' === pface.family ? 'A' : 'AAAA')
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, ttl: 10
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, class: dns.DNSRecord.Class.IN
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, className: 'IN'
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, address: pface.address // '_workstation._tcp.local'
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});
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});
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@ -40,43 +64,33 @@ module.exports.respond = function (socket, packets, rinfo) {
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var myRndId = 'be1af7a';
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rpacket.answer.push({
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name: q.name
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, type: dns.DNSRecord.Type.PTR
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, typeName: 'PTR'
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, ttl: 10
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, class: dns.DNSRecord.Class.IN
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, className: 'IN'
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, data: myRndId + '.' + queryname
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});
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rpacket.question.push(new dns.DNSRecord(
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queryname // Name
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, dns.DNSRecord.Type.PTR // Type
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, dns.DNSRecord.Class.IN // Class
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//, null // TTL
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));
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rpacket.additional.push({
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name: myRndId + '.' + queryname
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, type: dns.DNSRecord.Type.SRV
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, typeName: 'SRV'
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, ttl: 10
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, class: dns.DNSRecord.Class.IN
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, priority: 0
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, className: 'IN'
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, priority: 1
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, weight: 0
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, port: 443
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, target: myRndId + ".local"
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, target: myRndId + ".local"
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});
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rpacket.additional.push({
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name: myRndId + '.' + '_device-info._tcp.local'
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, type: dns.DNSRecord.Type.TXT
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, typeName: 'TXT'
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, ttl: 10
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, class: dns.DNSRecord.Class.IN
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, className: 'IN'
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, data: ["model=CloudHome1,1", "dappsvers=1"]
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});
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rpacket.header.id = packet.header.id;
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rpacket.header.aa = 1;
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rpacket.header.qr = 1;
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rpacket.header.rd = 0;
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console.log('');
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console.log('START JSON PACKET');
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console.log(rpacket);
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var buf = dns.DNSPacket.toBuffer(rpacket);
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var buf = dns.DNSPacket.write(rpacket);
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console.log(buf.toString('hex'));
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console.log('END JSON PACKET');
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console.log('');
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@ -89,8 +103,7 @@ module.exports.respond = function (socket, packets, rinfo) {
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console.log('');
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socket.send(buf, rinfo.port, rinfo.address);
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});
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/*
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*/
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packet.answer.forEach(function (a) {
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console.log('answer', a.name, a.typeName, a.className, a.flag, a);
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});
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@ -1,7 +1,6 @@
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'use strict';
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var dgram = require('dgram');
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var dnsjs = require('dns-js');
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// SO_REUSEADDR and SO_REUSEPORT are set because
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// the system mDNS Responder may already be listening on this port
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@ -22,4 +21,4 @@ socket.bind(port, function () {
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socket.addMembership(broadcast);
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// ... more stuff
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});
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});
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@ -5,7 +5,7 @@ var socket = dgram.createSocket({
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type: 'udp4'
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, reuseAddr: true
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});
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var dns = require('dns-js');
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var dns = require('../');
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//var DNSPacket = dns.DNSPacket;
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var broadcast = '224.0.0.251'; // mdns
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@ -31,17 +31,14 @@ return binString;
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}
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socket.on('message', function (message, rinfo) {
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console.log('Received %d bytes from %s:%d\n',
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message.length, rinfo.address, rinfo.port);
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console.log('Received %d bytes from %s:%d', message.length, rinfo.address, rinfo.port);
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//console.log(msg.toString('utf8'));
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message.forEach(function(byte){
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console.log(pad(byte.toString(2), 8,'0'));
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console.log(pad(byte.toString(2), 8, '0'));
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});
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// console.log(message.toString('hex'));
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// console.log(message.toString('ascii'));
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var packets;
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@ -3,7 +3,7 @@
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// SRV RDATA contains:
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// Priority: The relative priority of this service. 16-bit (range 0-65535)
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// Weight: Used when more than one serivice has the same priority. 16-bit
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// Weight: Used when more than one serivice has the same priority. 16-bit
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// (range 0-65535)
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// Port: Port number assigned to the symbolic service. 16-bit (range 0-65535)
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// Target: The name of the host that will provide service.
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@ -31,7 +31,7 @@ exports.DNS_PACKER_TYPE_SRV = function (ab, dv, total, record) {
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// console.log("record port is: " + record.port);
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// console.log("record target is: " + record.target);
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// console.log("total length currently is: " + total);
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var srvLen = 6; // 16-bit priority, weight and port = 6 Bytes
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var rdLenIndex = total;
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@ -62,7 +62,7 @@ exports.DNS_PACKER_TYPE_SRV = function (ab, dv, total, record) {
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// RDLENGTH
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dv.setUint16(rdLenIndex, srvLen, false);
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return total;
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};
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@ -24,12 +24,12 @@ exports.DNS_PARSER_TYPE_SOA = function (ab, packet, record) {
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// Primary NS
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record.name_server = unpackLabels(new Uint8Array(ab), record.rdstart, { byteLength: 0, cpcount: 0, labels: [], name: '' }).name;
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// if there exists compression pointers in the rdata
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if (cpcount > 0){
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// do something awesome with compression pointers to get the email address
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// I need the length of all the data before the email address starts.
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// if there are compression pointers then there will be a byte to indicate the length of each label, the label,
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// if there are compression pointers then there will be a byte to indicate the length of each label, the label,
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// then there will be a compression pointer to grab the longest label.
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var start = 2; // start or email_addr. take into account compression pointer and address length
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@ -41,7 +41,7 @@ exports.DNS_PARSER_TYPE_SOA = function (ab, packet, record) {
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if(parseInt(dv.getUint8(start - 2), 10) === 192){
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record.email_addr = unpackLabels(new Uint8Array(ab), record.rdstart + start ,{ byteLength: 0, cpcount: 0, labels: [], name: '' }).name;
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}
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}
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}
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} // if there are no compression pointers, we can get the email address directly from the offset
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else {
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@ -57,7 +57,7 @@ exports.DNS_PARSER_TYPE_SOA = function (ab, packet, record) {
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record.ex = dv.getUint32(dv.byteLength - 8, false);
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// Minimum TTL
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record.nx = dv.getUint32(dv.byteLength - 4, false);
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return record;
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