106 lines
3.2 KiB
JavaScript
106 lines
3.2 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
module.exports.respond = function (socket, packets, rinfo) {
|
||
|
|
var dns = require('dns-js');
|
||
|
|
var os = require('os');
|
||
|
|
var queryname = '_cloud._tcp.local';
|
||
|
|
|
||
|
|
console.log(packets);
|
||
|
|
|
||
|
|
packets.forEach(function (packet) {
|
||
|
|
packet.question.forEach(function (q) {
|
||
|
|
if (queryname !== q.name) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
console.log('question', q.name, q.typeName, q.className, q.flag, q);
|
||
|
|
var rpacket = new dns.DNSPacket();
|
||
|
|
var ifaces = os.networkInterfaces();
|
||
|
|
//var llRe = /^(fe80|169)/i; // link-local
|
||
|
|
|
||
|
|
Object.keys(ifaces).forEach(function (iname) {
|
||
|
|
var iface = ifaces[iname];
|
||
|
|
|
||
|
|
iface = iface.filter(function (pface) {
|
||
|
|
// nix loopback, internal and ipv6 link-local (non-routable) and ipv4 link-local
|
||
|
|
return !pface.internal;// && !(pface.scopeid > 1) && !llRe.test(pface.address);
|
||
|
|
});
|
||
|
|
|
||
|
|
iface.forEach(function (pface) {
|
||
|
|
rpacket.additional.push({
|
||
|
|
name: q.name
|
||
|
|
, type: ('IPv4' === pface.family ? dns.DNSRecord.Type.A : dns.DNSRecord.Type.AAAA)
|
||
|
|
, ttl: 10
|
||
|
|
, class: dns.DNSRecord.Class.IN
|
||
|
|
, address: pface.address // '_workstation._tcp.local'
|
||
|
|
});
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
var myRndId = 'be1af7a';
|
||
|
|
rpacket.answer.push({
|
||
|
|
name: q.name
|
||
|
|
, type: dns.DNSRecord.Type.PTR
|
||
|
|
, ttl: 10
|
||
|
|
, class: dns.DNSRecord.Class.IN
|
||
|
|
, data: myRndId + '.' + queryname
|
||
|
|
});
|
||
|
|
rpacket.question.push(new dns.DNSRecord(
|
||
|
|
queryname // Name
|
||
|
|
, dns.DNSRecord.Type.PTR // Type
|
||
|
|
, dns.DNSRecord.Class.IN // Class
|
||
|
|
//, null // TTL
|
||
|
|
));
|
||
|
|
rpacket.additional.push({
|
||
|
|
name: myRndId + '.' + queryname
|
||
|
|
, type: dns.DNSRecord.Type.SRV
|
||
|
|
, ttl: 10
|
||
|
|
, class: dns.DNSRecord.Class.IN
|
||
|
|
, priority: 0
|
||
|
|
, weight: 0
|
||
|
|
, port: 443
|
||
|
|
, target: myRndId + ".local"
|
||
|
|
});
|
||
|
|
rpacket.additional.push({
|
||
|
|
name: myRndId + '.' + '_device-info._tcp.local'
|
||
|
|
, type: dns.DNSRecord.Type.TXT
|
||
|
|
, ttl: 10
|
||
|
|
, class: dns.DNSRecord.Class.IN
|
||
|
|
, data: ["model=CloudHome1,1", "dappsvers=1"]
|
||
|
|
});
|
||
|
|
rpacket.header.id = packet.header.id;
|
||
|
|
rpacket.header.aa = 1;
|
||
|
|
rpacket.header.qr = 1;
|
||
|
|
rpacket.header.rd = 0;
|
||
|
|
|
||
|
|
console.log('');
|
||
|
|
console.log('START JSON PACKET');
|
||
|
|
console.log(rpacket);
|
||
|
|
var buf = dns.DNSPacket.toBuffer(rpacket);
|
||
|
|
console.log(buf.toString('hex'));
|
||
|
|
console.log('END JSON PACKET');
|
||
|
|
console.log('');
|
||
|
|
|
||
|
|
console.log('');
|
||
|
|
console.log('START DNS PACKET');
|
||
|
|
var pkt = dns.DNSPacket.parse(buf);
|
||
|
|
console.log(pkt);
|
||
|
|
console.log('END DNS PACKET');
|
||
|
|
console.log('');
|
||
|
|
socket.send(buf, rinfo.port, rinfo.address);
|
||
|
|
});
|
||
|
|
/*
|
||
|
|
*/
|
||
|
|
packet.answer.forEach(function (a) {
|
||
|
|
console.log('answer', a.name, a.typeName, a.className, a.flag, a);
|
||
|
|
});
|
||
|
|
packet.authority.forEach(function (a) {
|
||
|
|
console.log('authority', a.name, a.typeName, a.className, a.flag, a);
|
||
|
|
});
|
||
|
|
packet.additional.forEach(function (a) {
|
||
|
|
console.log('additional', a.name, a.typeName, a.className, a.flag, a);
|
||
|
|
});
|
||
|
|
});
|
||
|
|
console.log('\n');
|
||
|
|
};
|