106 lines
3.2 KiB
JavaScript
106 lines
3.2 KiB
JavaScript
'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 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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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 ifaces = os.networkInterfaces();
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//var llRe = /^(fe80|169)/i; // link-local
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Object.keys(ifaces).forEach(function (iname) {
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var iface = ifaces[iname];
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iface = iface.filter(function (pface) {
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// nix loopback, internal and ipv6 link-local (non-routable) and ipv4 link-local
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return !pface.internal;// && !(pface.scopeid > 1) && !llRe.test(pface.address);
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});
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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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, ttl: 10
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, class: dns.DNSRecord.Class.IN
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, address: pface.address // '_workstation._tcp.local'
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});
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});
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});
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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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, ttl: 10
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, class: dns.DNSRecord.Class.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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, ttl: 10
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, class: dns.DNSRecord.Class.IN
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, priority: 0
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, weight: 0
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, port: 443
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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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, ttl: 10
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, class: dns.DNSRecord.Class.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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console.log(buf.toString('hex'));
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console.log('END JSON PACKET');
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console.log('');
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console.log('');
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console.log('START DNS PACKET');
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var pkt = dns.DNSPacket.parse(buf);
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console.log(pkt);
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console.log('END DNS PACKET');
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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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packet.authority.forEach(function (a) {
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console.log('authority', a.name, a.typeName, a.className, a.flag, a);
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});
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packet.additional.forEach(function (a) {
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console.log('additional', a.name, a.typeName, a.className, a.flag, a);
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});
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});
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console.log('\n');
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};
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