Compare commits
No commits in common. "master" and "v1.1" have entirely different histories.
16
.jshintrc
16
.jshintrc
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@ -1,16 +0,0 @@
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{ "node": true
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||||
, "browser": true
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, "jquery": true
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, "strict": true
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, "indent": 2
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, "onevar": true
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||||
, "laxcomma": true
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, "laxbreak": true
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, "eqeqeq": true
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, "immed": true
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, "undef": true
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, "unused": true
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, "latedef": true
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, "curly": true
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, "trailing": true
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}
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1
BUGS.txt
1
BUGS.txt
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|
@ -1 +0,0 @@
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Currently allows labels to be terminated by rdata length. This was a mistake. They should always be terminated by a null character.
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@ -1,6 +0,0 @@
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v1.3.6 - A suitable replacement for most of my uses for big
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* Can capture dns packets in binary and JSON
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* Parses common record types including:
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* A,AAAA,CAA,CNAME,MX,NS,PTR,SOA,SRV,TXT
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* Arbitrary TYPExxx support
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* Known Bug: should error when label in rdata is not null terminated
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41
LICENSE
41
LICENSE
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@ -1,41 +0,0 @@
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Copyright 2017 AJ ONeal
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This is open source software; you can redistribute it and/or modify it under the
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terms of either:
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a) the "MIT License"
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||||
b) the "Apache-2.0 License"
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||||
|
||||
MIT License
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in all
|
||||
copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
SOFTWARE.
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||||
|
||||
Apache-2.0 License Summary
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
59
README.md
59
README.md
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@ -1,34 +1,27 @@
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dig.js
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======
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| [dns-suite](https://git.coolaj86.com/coolaj86/dns-suite)
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| **dig.js**
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| [mdig.js](https://git.coolaj86.com/coolaj86/mdig.js)
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| [digd.js](https://git.coolaj86.com/coolaj86/digd.js)
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| Sponsored by [ppl](https://ppl.family)[.](https://dapliefounder.com)
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Create and capture DNS and mDNS query and response packets to disk as binary and/or JSON.
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Options are similar to the Unix `dig` command. Supports dns0x20 security checking.
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Options are similar to the Unix `dig` command.
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Install
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Install with git
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-------
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### with git
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```bash
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# Install the latest of v1.x
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npm install -g 'git+https://git.coolaj86.com/coolaj86/dig.js.git#v1'
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npm install -g 'git+https://git@git.daplie.com/Daplie/dig.js.git#v1'
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```
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```bash
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# Install exactly v1.0.0
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npm install -g 'git+https://git.coolaj86.com/coolaj86/dig.js.git#v1.0.0'
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npm install -g 'git+https://git@git.daplie.com/Daplie/dig.js.git#v1.0.0'
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```
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### without git
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Install without git
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||||
-------
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|
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Don't have git? Well, you can also bow down to the gods of the centralized, monopolized, concentrated, *dictator*net
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(as we like to call it here at ppl Labs), if that's how you roll:
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(as we like to call it here at Daplie Labs), if that's how you roll:
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```bash
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npm install -g dig.js
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@ -37,14 +30,16 @@ npm install -g dig.js
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Usage
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-----
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### Format
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```bash
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dig.js [TYPE] <domainname>
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```
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**Example**:
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### Example
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```bash
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dig.js coolaj86.com
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dig.js daplie.com
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```
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### mDNS Browser Example
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|
|
@ -64,40 +59,24 @@ dig.js -p 5353 @224.0.0.251 PTR _services._dns-sd._udp.local +time=3
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### Moar Examples
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```bash
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dig.js A coolaj86.com
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dig.js A daplie.com
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dig.js @8.8.8.8 A coolaj86.com
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dig.js -t A daplie.com
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dig.js @8.8.8.8 A daplie.com
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```
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Options
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||||
-------
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||||
|
||||
```
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--debug
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--mdns
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--output <path/to/file> write query and response(s) to disk with this path prefix (ex: ./samples/dns)
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--mdns Use mDNS port and nameserver address, and listen for multiple packets
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-t <type> (superfluous) A, CNAME, MX, etc. Also supports -t type<decimal> for "unsupported" types. default ANY (mdns default: PTR)
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-t <type> (superfluous) default ANY (mdns default: PTR)
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-c <class> default IN
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-p <port> default 53 (mdns default: 5353) (listener is random for DNS and 5353 for mDNS)
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-q <query> (superfluous) required (ex: coolaj86.com)
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--nameserver <ns> alias of @<nameserver>
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--timeout <ms> alias of +time=<seconds>, but in milliseconds
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-q <query> (superfluous) required (ex: daplie.com)
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@<nameserver> specify the nameserver to use for DNS resolution (defaults to system defaults)
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+time=<seconds> Sets the timeout for a query in seconds.
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+norecurse Set `rd` flag to 0. Do not request recursion
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+aaonly Set `aa` flag to 1.
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--norecase Disable dns0x20 security checking (mixed casing). See https://dyn.com/blog/use-of-bit-0x20-in-dns-labels/
|
||||
--recase Print the dns0x20 casing as-is rather than converting it back to lowercase. This is the default when explicitly using mixed case.
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--debug verbose output
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||||
```
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Security Concerns
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||||
-----------------
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The 16-bit `id` of the query must match that of the response.
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|
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Extra entropy is added by using `dns0x20`, the de facto standard for RanDOmCASiNg on the query which must be matched in the response.
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|
|
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502
bin/dig.js
502
bin/dig.js
|
|
@ -1,11 +1,10 @@
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|||
#!/usr/bin/env node
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'use strict';
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||||
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var dig = require('../dns-request');
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var dnsjs = require('dns-suite');
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var cli = require('cli');
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var defaultNameservers = require('dns').getServers();
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var typeRe = /^type\d+$/i;
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var hexdump = require('../hexdump');
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||||
var crypto = require('crypto');
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cli.parse({
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// 'b': [ false, 'set source IP address (defaults to 0.0.0.0)', 'string' ]
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'class': [ 'c', 'class (defaults to IN)', 'string', 'IN' ]
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|
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@ -16,50 +15,243 @@ cli.parse({
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//, 'json': [ false, 'output results as json', 'string' ]
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//, 'lint': [ false, 'attack (in the metaphorical sense) a nameserver with all sorts of queries to test for correct responses', 'string', false ]
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, 'mdns': [ false, "Alias for setting defaults to -p 5353 @224.0.0.251 -t PTR -q _services._dns-sd._udp.local and waiting for multiple responses", 'boolean', false ]
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, 'timeout': [ false, "How long, in milliseconds, to wait for a response. Alias of +time=", 'int', false ]
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, 'timeout': [ false, "Alias for setting defaults to -p 5353 @224.0.0.251 -t PTR -q _services._dns-sd._udp.local and waiting for multiple responses", 'boolean', false ]
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, 'output': [ 'o', 'output prefix to use for writing query and response(s) to disk', 'file' ]
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, 'port': [ 'p', 'port (defaults to 53 for dns and 5353 for mdns)', 'int' ]
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, 'nameserver': [ false, 'the nameserver to use for DNS resolution (defaults to ' + defaultNameservers.join(',') + ')', 'string' ]
|
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//, 'serve': [ 's', 'path to json file with array of responses to issue for given queries', 'string' ]
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, 'type': [ 't', 'type (defaults to ANY for dns and PTR for mdns)', 'string' ]
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, 'query': [ 'q', 'a superfluous explicit option to set the query as a command line flag', 'string' ]
|
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, 'norecase': [ false, 'Disable dns0x20 security checking (mixed casing). See https://dyn.com/blog/use-of-bit-0x20-in-dns-labels/' ]
|
||||
, 'recase': [ false, "Print the dns0x20 casing as-is rather than converting it back to lowercase. This is the default when explicitly using mixed case." ]
|
||||
, 'query': [ 'q', 'a superfluous explicit option to set the query as a command line flag' ]
|
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});
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var common = require('../common.js');
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var fs = require('fs');
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var dgram = require('dgram');
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var commonTypes = [ 'A', 'AAAA', 'CNAME', 'MX', 'NS', 'PTR', 'SOA', 'SRV', 'TXT' ];
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var commonPrinters = {
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'ANY': function (q) {
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console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data || q.rdata || 'unknown record type');
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}
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, 'A': function (q) {
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console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.address);
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||||
}
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||||
, 'AAAA': function (q) {
|
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console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.address);
|
||||
}
|
||||
, 'CNAME': function (q) {
|
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console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data + '.');
|
||||
}
|
||||
, 'MX': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.priority + ' ' + q.exchange + '.');
|
||||
}
|
||||
, 'NS': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data);
|
||||
}
|
||||
, 'PTR': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data);
|
||||
}
|
||||
/*
|
||||
, 'SOA': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data);
|
||||
}
|
||||
*/
|
||||
, 'SRV': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.priority + ' ' + q.weight + ' ' + q.port + ' ' + q.target);
|
||||
}
|
||||
, 'TXT': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, '"' + q.data.join('" "') + '"');
|
||||
}
|
||||
};
|
||||
|
||||
function writeQuery(opts, query, queryAb) {
|
||||
var path = require('path');
|
||||
var binname = query.question[0].name + '.' + query.question[0].typeName.toLowerCase() + '.query.bin';
|
||||
var jsonname = query.question[0].name + '.' + query.question[0].typeName.toLowerCase() + '.query.json';
|
||||
var binpath = opts.output + '.' + binname;
|
||||
var jsonpath = opts.output + '.' + jsonname;
|
||||
var json = JSON.stringify(query, null, 2);
|
||||
if (-1 !== ['.', '/', '\\' ].indexOf(opts.output[opts.output.length -1])) {
|
||||
binpath = path.join(opts.output, binname);
|
||||
jsonpath = path.join(opts.output, jsonname);
|
||||
}
|
||||
|
||||
fs.writeFile(binpath, Buffer.from(queryAb), null, function () {
|
||||
console.log('wrote ' + queryAb.byteLength + ' bytes to ' + binpath);
|
||||
});
|
||||
fs.writeFile(jsonpath, json, null, function () {
|
||||
console.log('wrote ' + json.length + ' bytes to ' + jsonpath);
|
||||
});
|
||||
}
|
||||
|
||||
var count = 0;
|
||||
function writeResponse(opts, query, nb, packet) {
|
||||
var path = require('path');
|
||||
var binname = query.question[0].name + '.' + query.question[0].typeName.toLowerCase() + '.' + count + '.bin';
|
||||
var jsonname = query.question[0].name + '.' + query.question[0].typeName.toLowerCase() + '.' + count + '.json';
|
||||
var binpath = opts.output + '.' + binname;
|
||||
var jsonpath = opts.output + '.' + jsonname;
|
||||
var json = JSON.stringify(packet, null, 2);
|
||||
if (-1 !== ['.', '/', '\\' ].indexOf(opts.output[opts.output.length -1])) {
|
||||
binpath = path.join(opts.output, binname);
|
||||
jsonpath = path.join(opts.output, jsonname);
|
||||
}
|
||||
|
||||
count += 1;
|
||||
|
||||
fs.writeFile(binpath, nb, null, function () {
|
||||
console.log('wrote ' + nb.byteLength + ' bytes to ' + binpath);
|
||||
});
|
||||
fs.writeFile(jsonpath, json, null, function () {
|
||||
console.log('wrote ' + json.length + ' bytes to ' + jsonpath);
|
||||
});
|
||||
}
|
||||
|
||||
function request(query, opts) {
|
||||
var queryAb = dnsjs.DNSPacket.write(query);
|
||||
|
||||
if (opts.debug) {
|
||||
console.log('');
|
||||
console.log('DNS Question:');
|
||||
console.log('');
|
||||
console.log(query);
|
||||
console.log('');
|
||||
console.log(hexdump(queryAb));
|
||||
console.log('');
|
||||
console.log(dnsjs.DNSPacket.parse(queryAb));
|
||||
console.log('');
|
||||
}
|
||||
|
||||
var handlers = {};
|
||||
var server = dgram.createSocket({
|
||||
type: 'udp4'
|
||||
, reuseAddr: true
|
||||
});
|
||||
|
||||
handlers.onError = function (err) {
|
||||
console.error("error:", err.stack);
|
||||
server.close();
|
||||
};
|
||||
handlers.onMessage = function (nb) {
|
||||
var packet = dnsjs.DNSPacket.parse(nb.buffer.slice(nb.byteOffset, nb.byteOffset + nb.byteLength));
|
||||
|
||||
if (packet.id !== query.id) {
|
||||
console.log('ignoring packet for ', packet.question[0].name);
|
||||
}
|
||||
|
||||
if (!opts.mdns) {
|
||||
server.close();
|
||||
}
|
||||
|
||||
if (opts.debug) {
|
||||
console.log('');
|
||||
console.log('DNS Response:');
|
||||
console.log(packet);
|
||||
}
|
||||
|
||||
console.log('');
|
||||
console.log('; <<>> dig.js ' + 'v0.0.0' + ' <<>> ' + query.question[0].name);
|
||||
console.log(';; Got answer:');
|
||||
console.log(';; ->>HEADER<<-');
|
||||
console.log(JSON.stringify(packet.header));
|
||||
console.log('');
|
||||
console.log(';; QUESTION SECTION:');
|
||||
packet.question.forEach(function (q) {
|
||||
console.log(';' + q.name + '.', ' ', q.className, q.typeName);
|
||||
});
|
||||
function print(q) {
|
||||
var printer = commonPrinters[q.typeName] || commonPrinters.ANY;
|
||||
printer(q);
|
||||
}
|
||||
if (packet.answer.length) {
|
||||
console.log('');
|
||||
console.log(';; ANSWER SECTION:');
|
||||
packet.answer.forEach(print);
|
||||
}
|
||||
if (packet.authority.length) {
|
||||
console.log('');
|
||||
console.log(';; AUTHORITY SECTION:');
|
||||
packet.authority.forEach(print);
|
||||
}
|
||||
if (packet.additional.length) {
|
||||
console.log('');
|
||||
console.log(';; ADDITIONAL SECTION:');
|
||||
packet.additional.forEach(print);
|
||||
}
|
||||
console.log('');
|
||||
console.log(';; MSG SIZE rcvd: ' + nb.byteLength);
|
||||
console.log('');
|
||||
|
||||
if (opts.output) {
|
||||
console.log('');
|
||||
writeQuery(opts, query, queryAb);
|
||||
writeResponse(opts, query, nb, packet);
|
||||
}
|
||||
};
|
||||
handlers.onListening = function () {
|
||||
/*jshint validthis:true*/
|
||||
var server = this;
|
||||
var nameserver = opts.nameserver;
|
||||
var nameservers;
|
||||
var index;
|
||||
|
||||
if (!nameserver) {
|
||||
nameservers = require('dns').getServers();
|
||||
index = crypto.randomBytes(2).readUInt16BE(0) % nameservers.length;
|
||||
nameserver = nameservers[index];
|
||||
if (opts.debug) {
|
||||
console.log(index, nameservers);
|
||||
}
|
||||
}
|
||||
|
||||
if (opts.mdns || '224.0.0.251' === opts.nameserver) {
|
||||
server.setBroadcast(true);
|
||||
server.addMembership(opts.nameserver);
|
||||
}
|
||||
|
||||
if (opts.debug) {
|
||||
console.log('');
|
||||
console.log('Bound and Listening:');
|
||||
console.log(server.address());
|
||||
}
|
||||
|
||||
if (opts.debug) {
|
||||
console.log("querying '" + nameserver + "':'" + opts.port + "'");
|
||||
}
|
||||
server.send(Buffer.from(queryAb), opts.port, nameserver, function () {
|
||||
if (opts.debug) {
|
||||
console.log('');
|
||||
console.log('request sent');
|
||||
}
|
||||
});
|
||||
};
|
||||
|
||||
|
||||
server.on('error', handlers.onError);
|
||||
server.on('message', handlers.onMessage);
|
||||
server.on('listening', handlers.onListening);
|
||||
|
||||
// 0 dns request
|
||||
// 53 dns server
|
||||
// 5353 mdns
|
||||
if (opts.mdns) {
|
||||
server.bind(opts.port /*5353*/);
|
||||
setTimeout(function () {
|
||||
server.close();
|
||||
}, opts.timeout || (5 * 1000));
|
||||
}
|
||||
else {
|
||||
server.bind(0);
|
||||
}
|
||||
}
|
||||
|
||||
cli.main(function (args, cli) {
|
||||
cli.implicitType = cli.type;
|
||||
cli.implicitQuery = cli.query;
|
||||
args.forEach(function (arg) {
|
||||
if (typeRe.test(arg) || -1 !== common.types.concat([ 'ANY' ]).indexOf(arg.toUpperCase())) {
|
||||
if (cli.implicitType) {
|
||||
if (-1 !== commonTypes.concat([ 'ANY' ]).indexOf(arg.toUpperCase())) {
|
||||
if (cli.type) {
|
||||
console.error("'type' was specified more than once");
|
||||
process.exit(1);
|
||||
return;
|
||||
}
|
||||
cli.implicitType = cli.t = arg.toUpperCase();
|
||||
return;
|
||||
}
|
||||
|
||||
if (arg === '+aaonly' || arg === '+aaflag') {
|
||||
if (cli.aaonly) {
|
||||
console.error("'+aaonly' was specified more than once");
|
||||
process.exit(1);
|
||||
return;
|
||||
}
|
||||
cli.aaonly = true;
|
||||
return;
|
||||
}
|
||||
|
||||
if (arg === '+norecurse') {
|
||||
if (cli.norecurse) {
|
||||
console.error("'+norecurse' was specified more than once");
|
||||
process.exit(1);
|
||||
return;
|
||||
}
|
||||
cli.norecurse = true;
|
||||
cli.type = cli.t = arg.toUpperCase();
|
||||
return;
|
||||
}
|
||||
|
||||
|
|
@ -83,41 +275,15 @@ cli.main(function (args, cli) {
|
|||
return;
|
||||
}
|
||||
|
||||
if ('string' === typeof cli.implicitQuery) {
|
||||
console.error("'query' was specified more than once or unrecognized flag: " + cli.implicitQuery + ", " + arg);
|
||||
if (cli.query) {
|
||||
console.error("'query' was specified more than once");
|
||||
process.exit(1);
|
||||
return;
|
||||
}
|
||||
cli.implicitQuery = cli.q = arg;
|
||||
cli.query = cli.q = arg;
|
||||
|
||||
});
|
||||
|
||||
|
||||
// it can happen that a TLD is created with the name of a common type
|
||||
if (!cli.type && cli.implicitType && !cli.implicitQuery) {
|
||||
cli.implicitQuery = cli.implicitType;
|
||||
cli.implicitType = null;
|
||||
}
|
||||
if ('string' === typeof cli.implicitQuery) {
|
||||
cli.query = cli.implicitQuery;
|
||||
}
|
||||
if (cli.implicitType) {
|
||||
cli.type = cli.implicitType;
|
||||
}
|
||||
if ('string' !== typeof cli.query) {
|
||||
console.error('');
|
||||
console.error('Usage:');
|
||||
console.error('dig.js [@server] [TYPE] [domain]');
|
||||
console.error('');
|
||||
console.error('Example:');
|
||||
console.error('dig.js daplie.com');
|
||||
console.error('');
|
||||
process.exit(1);
|
||||
}
|
||||
if (cli.query !== cli.query.toLowerCase()) {
|
||||
cli.norecase = true;
|
||||
}
|
||||
|
||||
if (cli.mdns) {
|
||||
if (!cli.type) {
|
||||
cli.type = cli.t = 'PTR';
|
||||
|
|
@ -128,222 +294,52 @@ cli.main(function (args, cli) {
|
|||
if (!cli.nameserver) {
|
||||
cli.nameserver = '224.0.0.251';
|
||||
}
|
||||
if ('string' !== typeof cli.query) {
|
||||
if (!cli.query) {
|
||||
cli.query = '_services._dns-sd._udp.local';
|
||||
}
|
||||
if (!cli.timeout) {
|
||||
cli.timeout = 3000;
|
||||
}
|
||||
} else {
|
||||
if (!cli.timeout) {
|
||||
cli.timeout = 5000;
|
||||
}
|
||||
}
|
||||
|
||||
if (!cli.norecase) {
|
||||
cli.casedQuery = cli.query.split('').map(function (ch) {
|
||||
// dns0x20 takes advantage of the fact that the binary operation for toUpperCase is
|
||||
// ch = ch | 0x20;
|
||||
return Math.round(Math.random()) % 2 ? ch : ch.toUpperCase();
|
||||
}).join('');
|
||||
} else {
|
||||
cli.casedQuery = cli.query;
|
||||
}
|
||||
|
||||
if (!cli.type) {
|
||||
cli.type = cli.t = 'ANY';
|
||||
}
|
||||
if (typeRe.test(cli.type)) {
|
||||
cli.rawType = parseInt(cli.type.replace('type', ''), 10);
|
||||
}
|
||||
if (!cli.port) {
|
||||
cli.port = cli.p = 53;
|
||||
}
|
||||
if (!cli.class) {
|
||||
cli.class = cli.c = 'IN';
|
||||
}
|
||||
if (!cli.query) {
|
||||
console.error('');
|
||||
console.error('Usage:');
|
||||
console.error('dig.js [@server] [TYPE] [domain]');
|
||||
console.error('');
|
||||
console.error('Example:');
|
||||
console.error('dig.js daplie.com');
|
||||
console.error('');
|
||||
process.exit(1);
|
||||
}
|
||||
|
||||
var query = {
|
||||
header: {
|
||||
id: require('crypto').randomBytes(2).readUInt16BE(0)
|
||||
, qr: 0
|
||||
, opcode: 0
|
||||
, aa: cli.aaonly ? 1 : 0 // NA
|
||||
, tc: 0 // NA
|
||||
, rd: cli.norecurse ? 0 : 1
|
||||
, ra: 0 // NA
|
||||
, rcode: 0 // NA
|
||||
, aa: 0 // NA
|
||||
, tc: 0 // NA
|
||||
, rd: 1
|
||||
, ra: 0 // NA
|
||||
, rcode: 0 // NA
|
||||
}
|
||||
, question: [
|
||||
{ name: cli.casedQuery
|
||||
, type: cli.rawType
|
||||
, typeName: cli.rawType ? undefined : cli.type
|
||||
{ name: cli.query
|
||||
, typeName: cli.type
|
||||
, className: cli.class
|
||||
}
|
||||
]
|
||||
};
|
||||
|
||||
var dnsjs = require('dns-suite');
|
||||
var queryAb = dnsjs.DNSPacket.write(query);
|
||||
var hexdump = require('hexdump.js').hexdump;
|
||||
|
||||
if (cli.debug) {
|
||||
console.log('');
|
||||
console.log('DNS Question:');
|
||||
console.log('');
|
||||
console.log(query);
|
||||
console.log('');
|
||||
console.log(hexdump(queryAb));
|
||||
console.log('');
|
||||
console.log(dnsjs.DNSPacket.parse(queryAb));
|
||||
console.log('');
|
||||
}
|
||||
|
||||
cli.onError = function (err) {
|
||||
console.error("error:", err.stack);
|
||||
};
|
||||
|
||||
cli.onMessage = function (nb) {
|
||||
var packet = dnsjs.DNSPacket.parse(nb.buffer.slice(nb.byteOffset, nb.byteOffset + nb.byteLength));
|
||||
var fail0x20;
|
||||
|
||||
if (packet.id !== query.id) {
|
||||
console.error('[SECURITY] ignoring packet for \'' + packet.question[0].name + '\' due to mismatched id');
|
||||
console.error(packet);
|
||||
return;
|
||||
}
|
||||
|
||||
if (cli.debug) {
|
||||
console.log('');
|
||||
console.log('DNS Response:');
|
||||
console.log(packet);
|
||||
}
|
||||
|
||||
packet.question.forEach(function (q) {
|
||||
// if (-1 === q.name.lastIndexOf(cli.casedQuery))
|
||||
if (q.name !== cli.casedQuery) {
|
||||
fail0x20 = q.name;
|
||||
}
|
||||
});
|
||||
|
||||
if (!cli.norecase && !cli.recase) {
|
||||
[ 'question', 'answer', 'authority', 'additional' ].forEach(function (group) {
|
||||
(packet[group]||[]).forEach(function (a) {
|
||||
var an = a.name;
|
||||
var i = cli.query.toLowerCase().lastIndexOf(a.name.toLowerCase()); // answer is something like ExAMPle.cOM and query was wWw.ExAMPle.cOM
|
||||
var j = a.name.toLowerCase().lastIndexOf(cli.query.toLowerCase()); // answer is something like www.ExAMPle.cOM and query was ExAMPle.cOM
|
||||
|
||||
// it's important to note that these should only relpace changes in casing that we expected
|
||||
// any abnormalities should be left intact to go "huh?" about
|
||||
// TODO detect abnormalities?
|
||||
if (-1 !== i) {
|
||||
// "EXamPLE.cOm".replace("wWw.EXamPLE.cOm".substr(4), "www.example.com".substr(4))
|
||||
a.name = a.name.replace(cli.casedQuery.substr(i), cli.query.substr(i));
|
||||
} else if (-1 !== j) {
|
||||
// "www.example.com".replace("EXamPLE.cOm", "example.com")
|
||||
a.name = a.name.substr(0, j) + a.name.substr(j).replace(cli.casedQuery, cli.query);
|
||||
}
|
||||
|
||||
// NOTE: right now this assumes that anything matching the query matches all the way to the end
|
||||
// it does not handle the case of a record for example.com.uk being returned in response to a query for www.example.com correctly
|
||||
// (but I don't think it should need to)
|
||||
if (a.name.length !== an.length) {
|
||||
console.error("[ERROR] question / answer mismatch: '" + an + "' != '" + a.length + "'");
|
||||
console.error(a);
|
||||
}
|
||||
});
|
||||
});
|
||||
}
|
||||
|
||||
if (fail0x20) {
|
||||
console.warn("");
|
||||
console.warn(";; Warning: DNS 0x20 security not implemented (or packet spoofed). Queried '" + cli.casedQuery + "' but got response for '" + fail0x20 + "'.");
|
||||
console.warn("");
|
||||
}
|
||||
|
||||
console.log(';; Got answer:');
|
||||
dig.logQuestion(packet);
|
||||
|
||||
function print(q) {
|
||||
var printer = common.printers[q.typeName] || common.printers.ANY;
|
||||
printer(q);
|
||||
}
|
||||
if (packet.answer.length) {
|
||||
console.log('');
|
||||
console.log(';; ANSWER SECTION:');
|
||||
packet.answer.forEach(print);
|
||||
}
|
||||
if (packet.authority.length) {
|
||||
console.log('');
|
||||
console.log(';; AUTHORITY SECTION:');
|
||||
packet.authority.forEach(print);
|
||||
}
|
||||
if (packet.additional.length) {
|
||||
console.log('');
|
||||
console.log(';; ADDITIONAL SECTION:');
|
||||
packet.additional.forEach(print);
|
||||
}
|
||||
console.log('');
|
||||
console.log(';; Query time: ' + (Date.now() - cli._ts) + ' msec');
|
||||
// ;; SERVER: 8.8.8.8#53(8.8.8.8)
|
||||
console.log(';; SERVER: ' + cli._nameserver + '#' + cli.port + '(' + cli._nameserver + ')');
|
||||
// TODO ;; WHEN: Fri Sep 15 18:25:53 2017
|
||||
console.log(';; WHEN: ' + new Date().toString());
|
||||
console.log(';; MSG SIZE rcvd: ' + nb.byteLength);
|
||||
console.log('');
|
||||
|
||||
if (cli.output) {
|
||||
console.log('');
|
||||
common.writeQuery(cli, query, queryAb);
|
||||
common.writeResponse(cli, query, nb, packet);
|
||||
}
|
||||
};
|
||||
cli.onListening = function () {
|
||||
/*jshint validthis:true*/
|
||||
var server = this;
|
||||
|
||||
if (cli.debug) {
|
||||
console.log('');
|
||||
console.log('Bound and Listening:', server.type);
|
||||
console.log(server.address());
|
||||
}
|
||||
|
||||
// technicially this should be a seperate event
|
||||
if (cli.debug) {
|
||||
console.log("querying '" + server.nameserver + "':'" + cli.port + "'");
|
||||
}
|
||||
};
|
||||
|
||||
console.log('');
|
||||
if (!cli.nocmd) {
|
||||
console.log('; <<>> dig.js ' + 'v0.0.0' + ' <<>> ' + process.argv.slice(2).join(' ').replace(cli.query, cli.casedQuery));
|
||||
console.log(';; global options: +cmd');
|
||||
}
|
||||
|
||||
var opts = {
|
||||
onError: cli.onError
|
||||
, onMessage: cli.onMessage
|
||||
, onListening: cli.onListening
|
||||
, onSent: function (res) {
|
||||
cli._nameserver = res.nameserver;
|
||||
cli._ts = Date.now();
|
||||
if (cli.debug) {
|
||||
console.log('');
|
||||
console.log('request sent to', res.nameserver);
|
||||
}
|
||||
}
|
||||
, onTimeout: function (res) {
|
||||
console.log(";; connection timed out; no servers could be reached");
|
||||
console.log(";; [timed out after " + res.timeout + "ms and 1 tries]");
|
||||
}
|
||||
, onClose: function () {
|
||||
console.log('');
|
||||
}
|
||||
, mdns: cli.mdns
|
||||
, nameserver: cli.nameserver
|
||||
, port: cli.port
|
||||
, timeout: cli.timeout
|
||||
};
|
||||
|
||||
dig.resolve(queryAb, opts);
|
||||
request(query, cli);
|
||||
});
|
||||
|
|
|
|||
|
|
@ -0,0 +1,331 @@
|
|||
#!/usr/bin/env node
|
||||
'use strict';
|
||||
|
||||
var dnsjs = require('dns-suite');
|
||||
var cli = require('cli');
|
||||
var hexdump = require('../hexdump');
|
||||
var crypto = require('crypto');
|
||||
cli.parse({
|
||||
// 'b': [ false, 'set source IP address (defaults to 0.0.0.0)', 'string' ]
|
||||
'debug': [ false, 'more verbose output', 'boolean', false ]
|
||||
//, 'insecure': [ false, 'turn off RaNDOm cAPS required for securing queries']
|
||||
//, 'ipv4': [ '4', 'use ipv4 exclusively (defaults to false)', 'boolean', false ]
|
||||
//, 'ipv6': [ '6', 'use ipv6 exclusively (defaults to false)', 'boolean', false ]
|
||||
//, 'json': [ false, 'output results as json', 'string' ]
|
||||
//, 'lint': [ false, 'attack (in the metaphorical sense) a nameserver with all sorts of queries to test for correct responses', 'string', false ]
|
||||
, 'mdns': [ false, "Alias for setting defaults to -p 5353 @224.0.0.251 -t PTR -q _services._dns-sd._udp.local and waiting for multiple responses", 'boolean', false ]
|
||||
, 'output': [ 'o', 'output prefix to use for writing query and response(s) to disk', 'file' ]
|
||||
, 'port': [ 'p', 'port (defaults to 53 for dns and 5353 for mdns)', 'int' ]
|
||||
//, 'serve': [ 's', 'path to json file with array of responses to issue for given queries', 'string' ]
|
||||
, 'type': [ 't', 'type (defaults to ANY for dns and PTR for mdns)', 'string' ]
|
||||
, 'query': [ 'q', 'a superfluous explicit option to set the query as a command line flag' ]
|
||||
});
|
||||
|
||||
var fs = require('fs');
|
||||
var dgram = require('dgram');
|
||||
var commonTypes = [ 'A', 'AAAA', 'CNAME', 'MX', 'NS', 'PTR', 'SOA', 'SRV', 'TXT' ];
|
||||
var commonPrinters = {
|
||||
'ANY': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data || q.rdata || 'unknown record type');
|
||||
}
|
||||
|
||||
, 'A': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.address);
|
||||
}
|
||||
, 'AAAA': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.address);
|
||||
}
|
||||
, 'CNAME': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data + '.');
|
||||
}
|
||||
, 'MX': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.priority + ' ' + q.exchange + '.');
|
||||
}
|
||||
, 'NS': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data);
|
||||
}
|
||||
, 'PTR': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data);
|
||||
}
|
||||
/*
|
||||
, 'SOA': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data);
|
||||
}
|
||||
*/
|
||||
, 'SRV': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.priority + ' ' + q.weight + ' ' + q.port + ' ' + q.target);
|
||||
}
|
||||
, 'TXT': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, '"' + q.data.join('" "') + '"');
|
||||
}
|
||||
};
|
||||
|
||||
function writeQuery(opts, query, queryAb) {
|
||||
var path = require('path');
|
||||
var binname = query.question[0].name + '.' + query.question[0].typeName.toLowerCase() + '.query.bin';
|
||||
var jsonname = query.question[0].name + '.' + query.question[0].typeName.toLowerCase() + '.query.json';
|
||||
var binpath = opts.output + '.' + binname;
|
||||
var jsonpath = opts.output + '.' + jsonname;
|
||||
var json = JSON.stringify(query, null, 2);
|
||||
if (-1 !== ['.', '/', '\\' ].indexOf(opts.output[opts.output.length -1])) {
|
||||
binpath = path.join(opts.output, binname);
|
||||
jsonpath = path.join(opts.output, jsonname);
|
||||
}
|
||||
|
||||
fs.writeFile(binpath, Buffer.from(queryAb), null, function () {
|
||||
console.log('wrote ' + queryAb.byteLength + ' bytes to ' + binpath);
|
||||
});
|
||||
fs.writeFile(jsonpath, json, null, function () {
|
||||
console.log('wrote ' + json.length + ' bytes to ' + jsonpath);
|
||||
});
|
||||
}
|
||||
|
||||
var count = 0;
|
||||
function writeResponse(opts, query, nb, packet) {
|
||||
var path = require('path');
|
||||
var binname = query.question[0].name + '.' + query.question[0].typeName.toLowerCase() + '.' + count + '.bin';
|
||||
var jsonname = query.question[0].name + '.' + query.question[0].typeName.toLowerCase() + '.' + count + '.json';
|
||||
var binpath = opts.output + '.' + binname;
|
||||
var jsonpath = opts.output + '.' + jsonname;
|
||||
var json = JSON.stringify(packet, null, 2);
|
||||
if (-1 !== ['.', '/', '\\' ].indexOf(opts.output[opts.output.length -1])) {
|
||||
binpath = path.join(opts.output, binname);
|
||||
jsonpath = path.join(opts.output, jsonname);
|
||||
}
|
||||
|
||||
count += 1;
|
||||
|
||||
fs.writeFile(binpath, nb, null, function () {
|
||||
console.log('wrote ' + nb.byteLength + ' bytes to ' + binpath);
|
||||
});
|
||||
fs.writeFile(jsonpath, json, null, function () {
|
||||
console.log('wrote ' + json.length + ' bytes to ' + jsonpath);
|
||||
});
|
||||
}
|
||||
|
||||
function request(query, opts) {
|
||||
var queryAb = dnsjs.DNSPacket.write(query);
|
||||
|
||||
if (opts.debug) {
|
||||
console.log('');
|
||||
console.log('DNS Question:');
|
||||
console.log('');
|
||||
console.log(query);
|
||||
console.log('');
|
||||
console.log(hexdump(queryAb));
|
||||
console.log('');
|
||||
console.log(dnsjs.DNSPacket.parse(queryAb));
|
||||
console.log('');
|
||||
}
|
||||
|
||||
var handlers = {};
|
||||
var server = dgram.createSocket({
|
||||
type: 'udp4'
|
||||
, reuseAddr: true
|
||||
});
|
||||
|
||||
handlers.onError = function (err) {
|
||||
console.error("error:", err.stack);
|
||||
server.close();
|
||||
};
|
||||
handlers.onMessage = function (nb) {
|
||||
console.log("YOYOYO GOT MESSAGE");
|
||||
var packet = dnsjs.DNSPacket.parse(nb.buffer.slice(nb.byteOffset, nb.byteOffset + nb.byteLength));
|
||||
|
||||
if (opts.debug) {
|
||||
console.log('');
|
||||
console.log('DNS Request:');
|
||||
console.log(packet);
|
||||
}
|
||||
|
||||
console.log('');
|
||||
console.log('; <<>> dig.js ' + 'v0.0.0' + ' <<>> ' + query.question[0].name);
|
||||
console.log(';; Got answer:');
|
||||
console.log(';; ->>HEADER<<-');
|
||||
console.log(JSON.stringify(packet.header));
|
||||
console.log('');
|
||||
console.log(';; QUESTION SECTION:');
|
||||
packet.question.forEach(function (q) {
|
||||
console.log(';' + q.name + '.', ' ', q.className, q.typeName);
|
||||
});
|
||||
/*
|
||||
function print(q) {
|
||||
var printer = commonPrinters[q.typeName] || commonPrinters.ANY;
|
||||
printer(q);
|
||||
}
|
||||
if (packet.answer.length) {
|
||||
console.log('');
|
||||
console.log(';; ANSWER SECTION:');
|
||||
packet.answer.forEach(print);
|
||||
}
|
||||
if (packet.authority.length) {
|
||||
console.log('');
|
||||
console.log(';; AUTHORITY SECTION:');
|
||||
packet.authority.forEach(print);
|
||||
}
|
||||
if (packet.additional.length) {
|
||||
console.log('');
|
||||
console.log(';; ADDITIONAL SECTION:');
|
||||
packet.additional.forEach(print);
|
||||
}
|
||||
console.log('');
|
||||
console.log(';; MSG SIZE rcvd: ' + nb.byteLength);
|
||||
console.log('');
|
||||
*/
|
||||
|
||||
if (opts.output) {
|
||||
console.log('');
|
||||
writeQuery(opts, query, queryAb);
|
||||
//writeResponse(opts, query, nb, packet);
|
||||
}
|
||||
};
|
||||
handlers.onListening = function () {
|
||||
console.log("YOYOYO ON LISTENING");
|
||||
/*jshint validthis:true*/
|
||||
var server = this;
|
||||
var nameserver = opts.nameserver;
|
||||
var nameservers;
|
||||
var index;
|
||||
|
||||
if (!nameserver) {
|
||||
nameservers = require('dns').getServers();
|
||||
index = crypto.randomBytes(2).readUInt16BE(0) % nameservers.length;
|
||||
nameserver = nameservers[index];
|
||||
if (opts.debug) {
|
||||
console.log(index, nameservers);
|
||||
}
|
||||
}
|
||||
|
||||
if (opts.mdns || '224.0.0.251' === opts.nameserver) {
|
||||
server.setBroadcast(true);
|
||||
server.addMembership(opts.nameserver);
|
||||
}
|
||||
|
||||
if (opts.debug) {
|
||||
console.log('');
|
||||
console.log('Bound and Listening:');
|
||||
console.log(server.address());
|
||||
}
|
||||
|
||||
if (opts.debug) {
|
||||
console.log('querying ' + nameserver + ':' + opts.port);
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
server.on('error', handlers.onError);
|
||||
server.on('message', handlers.onMessage);
|
||||
server.on('listening', handlers.onListening);
|
||||
|
||||
// 53 dns server
|
||||
// 5353 mdns
|
||||
console.log("YOYOYO BINDING ON", opts.port);
|
||||
server.bind(opts.port);
|
||||
}
|
||||
|
||||
cli.main(function (args, cli) {
|
||||
args.forEach(function (arg) {
|
||||
if (-1 !== commonTypes.indexOf(arg.toUpperCase())) {
|
||||
if (cli.type) {
|
||||
console.error("'type' was specified more than once");
|
||||
process.exit(1);
|
||||
return;
|
||||
}
|
||||
cli.type = cli.t = arg.toUpperCase();
|
||||
return;
|
||||
}
|
||||
|
||||
if (/^\+time=/.test(arg)) {
|
||||
if (cli.timeout) {
|
||||
console.error("'+time=' was specified more than once");
|
||||
process.exit(1);
|
||||
return;
|
||||
}
|
||||
cli.timeout = Math.round(parseInt(arg.replace(/\+time=/, ''), 10) * 1000);
|
||||
return;
|
||||
}
|
||||
|
||||
if (/^@/.test(arg)) {
|
||||
if (cli.nameserver) {
|
||||
console.error("'@server' was specified more than once");
|
||||
process.exit(1);
|
||||
return;
|
||||
}
|
||||
cli.nameserver = cli.n = arg.substr(1);
|
||||
return;
|
||||
}
|
||||
|
||||
if (cli.query) {
|
||||
console.error("'query' was specified more than once");
|
||||
process.exit(1);
|
||||
return;
|
||||
}
|
||||
cli.query = cli.q = arg;
|
||||
|
||||
});
|
||||
|
||||
if (cli.mdns) {
|
||||
if (!cli.type) {
|
||||
cli.type = cli.t = 'PTR';
|
||||
}
|
||||
if (!cli.port) {
|
||||
cli.port = cli.p = 5353;
|
||||
}
|
||||
if (!cli.nameserver) {
|
||||
cli.nameserver = '224.0.0.251';
|
||||
}
|
||||
if (!cli.query) {
|
||||
cli.query = '_services._dns-sd._udp.local';
|
||||
}
|
||||
if (!cli.timeout) {
|
||||
cli.timeout = 3000;
|
||||
}
|
||||
}
|
||||
|
||||
if (!cli.type) {
|
||||
cli.type = cli.t = 'A';
|
||||
}
|
||||
if (!cli.port) {
|
||||
cli.port = cli.p = 53;
|
||||
}
|
||||
if (!cli.class) {
|
||||
cli.class = cli.c = 'IN';
|
||||
}
|
||||
if (!cli.query) {
|
||||
cli.query = 'example.com';
|
||||
/*
|
||||
console.error('');
|
||||
console.error('Usage:');
|
||||
console.error('digd.js [@server] [TYPE] [domain]');
|
||||
console.error('');
|
||||
console.error('Example:');
|
||||
console.error('digd.js daplie.com');
|
||||
console.error('');
|
||||
process.exit(1);
|
||||
*/
|
||||
}
|
||||
|
||||
var query = {
|
||||
header: {
|
||||
id: crypto.randomBytes(2).readUInt16BE(0)
|
||||
, qr: 0
|
||||
, opcode: 0
|
||||
, aa: 0 // NA
|
||||
, tc: 0 // NA
|
||||
, rd: 1
|
||||
, ra: 0 // NA
|
||||
, rcode: 0 // NA
|
||||
}
|
||||
, question: [
|
||||
{ name: cli.query
|
||||
, typeName: cli.type
|
||||
, className: cli.class
|
||||
}
|
||||
]
|
||||
};
|
||||
|
||||
if (!cli.daemon) {
|
||||
request(query, cli);
|
||||
return;
|
||||
}
|
||||
});
|
||||
90
common.js
90
common.js
|
|
@ -1,90 +0,0 @@
|
|||
'use strict';
|
||||
|
||||
var fs = require('fs');
|
||||
|
||||
module.exports = {
|
||||
types: [ 'A', 'AAAA', 'CNAME', 'MX', 'NS', 'PTR', 'SOA', 'SRV', 'TXT' ]
|
||||
, printers: {
|
||||
'ANY': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, (q.className || q.class), (q.typeName || ('type' + q.type)), q.data || q.rdata || 'unknown record type');
|
||||
}
|
||||
|
||||
, 'A': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.address);
|
||||
}
|
||||
, 'AAAA': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.address);
|
||||
}
|
||||
, 'CNAME': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data + '.');
|
||||
}
|
||||
, 'MX': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.priority + ' ' + q.exchange + '.');
|
||||
}
|
||||
, 'NS': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data);
|
||||
}
|
||||
, 'PTR': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.data);
|
||||
}
|
||||
, 'SOA': function (q) {
|
||||
// no ';' in authority section?
|
||||
console.log('' + q.name + '.', q.ttl, q.className, q.typeName, q.name_server, q.email_addr, q.sn, q.ref, q.ret, q.ex, q.nx);
|
||||
}
|
||||
, 'SRV': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.priority + ' ' + q.weight + ' ' + q.port + ' ' + q.target);
|
||||
}
|
||||
, 'TXT': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, '"' + q.data.join('" "') + '"');
|
||||
}
|
||||
, 'CAA': function (q) {
|
||||
console.log(';' + q.name + '.', q.ttl, q.className, q.typeName, q.flag + ' ' + q.tag + ' "' + q.value + '"');
|
||||
}
|
||||
}
|
||||
, writeQuery: function (opts, query, queryAb) {
|
||||
var path = require('path');
|
||||
var basename = query.question[0].name + '.'
|
||||
+ (query.question[0].typeName||query.question[0].type.toString()).toLowerCase();
|
||||
var binname = basename + '.query.bin';
|
||||
var jsonname = basename + '.query.json';
|
||||
var binpath = opts.output + '.' + binname;
|
||||
var jsonpath = opts.output + '.' + jsonname;
|
||||
var json = JSON.stringify(query, null, 2);
|
||||
if (-1 !== ['.', '/', '\\' ].indexOf(opts.output[opts.output.length -1])) {
|
||||
binpath = path.join(opts.output, binname);
|
||||
jsonpath = path.join(opts.output, jsonname);
|
||||
}
|
||||
|
||||
fs.writeFile(binpath, Buffer.from(queryAb), null, function () {
|
||||
console.log('wrote ' + queryAb.byteLength + ' bytes to ' + binpath);
|
||||
});
|
||||
fs.writeFile(jsonpath, json, null, function () {
|
||||
console.log('wrote ' + json.length + ' bytes to ' + jsonpath);
|
||||
});
|
||||
}
|
||||
, writeResponse: function (opts, query, nb, packet) {
|
||||
var me = this;
|
||||
me._count = me._count || 0;
|
||||
var path = require('path');
|
||||
var basename = query.question[0].name + '.'
|
||||
+ (query.question[0].typeName||query.question[0].type.toString()).toLowerCase();
|
||||
var binname = basename + '.' + me._count + '.bin';
|
||||
var jsonname = basename + '.' + me._count + '.json';
|
||||
var binpath = opts.output + '.' + binname;
|
||||
var jsonpath = opts.output + '.' + jsonname;
|
||||
var json = JSON.stringify(packet, null, 2);
|
||||
if (-1 !== ['.', '/', '\\' ].indexOf(opts.output[opts.output.length -1])) {
|
||||
binpath = path.join(opts.output, binname);
|
||||
jsonpath = path.join(opts.output, jsonname);
|
||||
}
|
||||
|
||||
me._count += 1;
|
||||
|
||||
fs.writeFile(binpath, nb, null, function () {
|
||||
console.log('wrote ' + nb.byteLength + ' bytes to ' + binpath);
|
||||
});
|
||||
fs.writeFile(jsonpath, json, null, function () {
|
||||
console.log('wrote ' + json.length + ' bytes to ' + jsonpath);
|
||||
});
|
||||
}
|
||||
};
|
||||
154
dns-request.js
154
dns-request.js
|
|
@ -1,154 +0,0 @@
|
|||
'use strict';
|
||||
|
||||
var dnsjs = require('dns-suite');
|
||||
var crypto = require('crypto');
|
||||
var dgram = require('dgram');
|
||||
|
||||
var RCODES = {
|
||||
0: 'NOERROR'
|
||||
, 3: 'NXDOMAIN'
|
||||
, 5: 'REFUSED'
|
||||
};
|
||||
|
||||
function logQuestion(packet) {
|
||||
var flags = "";
|
||||
|
||||
// TODO opcode 0 QUERY rcode 0 NOERROR
|
||||
console.info(';; ->>HEADER<<- [opcode: ' + packet.header.opcode + ', status: ' + (RCODES[packet.header.rcode] || packet.header.rcode) + '], id: ' + packet.header.id);
|
||||
if (packet.header.tc) { console.info("Truncated [tc] (we don't know the normal way to print a tc packet... you should record this with -o tc-packet.dig and send it to us)"); }
|
||||
flags += ";; flags:";
|
||||
if (packet.header.qr) { flags += " qr"; }
|
||||
if (packet.header.aa) { flags += " aa"; }
|
||||
if (packet.header.rd) { flags += " rd"; }
|
||||
if (packet.header.ra) { flags += " ra"; }
|
||||
flags += "; QUERY: " + packet.question.length + ", ANSWER: " + packet.answer.length + ", AUTHORITY: " + packet.authority.length + ", ADDITIONAL: " + packet.additional.length;
|
||||
console.info(flags);
|
||||
if (packet.header.res1) { console.info("[res1] (we don't know how to print a packet with res1 yet)"); }
|
||||
if (packet.header.res2) { console.info("[res2] (we don't know how to print a packet with res2 yet)"); }
|
||||
if (packet.header.res3) { console.info("[res3] (we don't know how to print a packet with res2 yet)"); }
|
||||
// {"id":32736,"qr":1,"opcode":0,"aa":0,"tc":0,"rd":1,"ra":0,"res1":0,"res2":0,"res3":0,"rcode":5}
|
||||
//console.log(JSON.stringify(packet.header));
|
||||
console.info('');
|
||||
console.info(';; QUESTION SECTION:');
|
||||
packet.question.forEach(function (q) {
|
||||
console.info(';' + q.name + '.', ' ', q.className, q.typeName || ('type' + q.type));
|
||||
});
|
||||
}
|
||||
|
||||
function resolve(queryAb, opts) {
|
||||
var handlers = {};
|
||||
var nameservers;
|
||||
var nameserver = opts.nameserver;
|
||||
var index;
|
||||
var udpType;
|
||||
var receivedMessage;
|
||||
if (!nameserver) {
|
||||
nameservers = require('dns').getServers();
|
||||
index = crypto.randomBytes(2).readUInt16BE(0) % nameservers.length;
|
||||
nameserver = nameservers[index];
|
||||
}
|
||||
udpType = /:/.test(nameserver) ? 'udp6' : 'udp4';
|
||||
var server = dgram.createSocket({
|
||||
type: udpType
|
||||
, reuseAddr: true
|
||||
});
|
||||
server.nameserver = nameserver;
|
||||
|
||||
handlers.onError = function (err) {
|
||||
if (opts.onError) { opts.onError(err); } else { throw err; }
|
||||
server.close();
|
||||
};
|
||||
handlers.onMessage = function (bin) {
|
||||
receivedMessage = true;
|
||||
if (!opts.mdns) {
|
||||
clearTimeout(server._timeoutToken);
|
||||
server.close();
|
||||
}
|
||||
|
||||
if (opts.onMessage) { opts.onMessage(bin); }
|
||||
};
|
||||
handlers.onListening = function () {
|
||||
/*jshint validthis:true*/
|
||||
var server = this;
|
||||
|
||||
if (opts.mdns || '224.0.0.251' === server.nameserver) {
|
||||
server.setBroadcast(true);
|
||||
server.addMembership(server.nameserver || '224.0.0.251');
|
||||
}
|
||||
|
||||
if (opts.onListening) { opts.onListening.apply(server); }
|
||||
|
||||
server.send(Buffer.from(queryAb), opts.port, server.nameserver, function () {
|
||||
if (opts.onSent) { opts.onSent({ port: opts.port, nameserver: server.nameserver }); }
|
||||
});
|
||||
};
|
||||
handlers.onClose = function () {
|
||||
if (opts.onClose) { opts.onClose(); }
|
||||
};
|
||||
|
||||
server.on('error', handlers.onError);
|
||||
server.on('message', handlers.onMessage);
|
||||
server.on('listening', handlers.onListening);
|
||||
server.on('close', handlers.onClose);
|
||||
|
||||
// 0 dns request
|
||||
// 53 dns server
|
||||
// 5353 mdns
|
||||
if (opts.mdns) {
|
||||
server.bind(opts.port /*5353*/);
|
||||
}
|
||||
else {
|
||||
server.bind(0);
|
||||
}
|
||||
var ms = opts.timeout || (5 * 1000);
|
||||
server._timeoutToken = setTimeout(function () {
|
||||
if (!receivedMessage && opts.onTimeout) { opts.onTimeout({ timeout: ms }); }
|
||||
server.close();
|
||||
}, ms);
|
||||
}
|
||||
|
||||
function resolveJson(query, opts) {
|
||||
var queryAb;
|
||||
try {
|
||||
queryAb = dnsjs.DNSPacket.write(query);
|
||||
} catch(e) {
|
||||
if ('function' === typeof opts.onError) { opts.onError(e); return; }
|
||||
throw e;
|
||||
}
|
||||
|
||||
//console.log('[DEV] nameserver', opts.nameserver);
|
||||
var options = {
|
||||
onError: opts.onError
|
||||
, onMessage: function (nb) {
|
||||
var packet;
|
||||
try {
|
||||
packet = dnsjs.DNSPacket.parse(nb.buffer.slice(nb.byteOffset, nb.byteOffset + nb.byteLength));
|
||||
} catch(e) {
|
||||
if (opts.onError) { opts.onError(e); return; }
|
||||
|
||||
console.error("[Error] couldn't parse incoming message");
|
||||
console.error(e);
|
||||
return;
|
||||
}
|
||||
|
||||
opts.onMessage(packet);
|
||||
}
|
||||
, onListening: opts.onListening
|
||||
, onSent: opts.onSent
|
||||
, onClose: opts.onClose
|
||||
, onTimeout: opts.onTimeout
|
||||
, mdns: opts.mdns
|
||||
, nameserver: opts.nameserver
|
||||
, port: opts.port
|
||||
, timeout: opts.timeout
|
||||
};
|
||||
|
||||
return resolve(queryAb, options);
|
||||
}
|
||||
|
||||
module.exports.resolve = resolve;
|
||||
module.exports.resolveJson = resolveJson;
|
||||
module.exports.request = resolve;
|
||||
module.exports.requestJson = resolveJson;
|
||||
|
||||
module.exports.logQuestion = logQuestion;
|
||||
|
|
@ -0,0 +1,27 @@
|
|||
module.exports = function hexdump(ab) {
|
||||
var ui8 = new Uint8Array(ab);
|
||||
var bytecount = 0;
|
||||
var head = ' 0 1 2 3 4 5 6 7 8 9 A B C D E F';
|
||||
var trail;
|
||||
var str = [].slice.call(ui8).map(function (i) {
|
||||
var h = i.toString(16);
|
||||
if (h.length < 2) {
|
||||
h = '0' + h;
|
||||
}
|
||||
return h;
|
||||
}).join('').match(/.{1,2}/g).join(' ').match(/.{1,48}/g).map(function (str) {
|
||||
var lead = bytecount.toString(16);
|
||||
bytecount += 16;
|
||||
|
||||
while (lead.length < 7) {
|
||||
lead = '0' + lead;
|
||||
}
|
||||
|
||||
return lead + ' ' + str;
|
||||
}).join('\n');
|
||||
trail = ab.byteLength.toString(16);
|
||||
while (trail.length < 7) {
|
||||
trail = '0' + trail;
|
||||
}
|
||||
return head + '\n' + str + '\n' + trail;
|
||||
};
|
||||
20
package.json
20
package.json
|
|
@ -1,18 +1,18 @@
|
|||
{
|
||||
"name": "dig.js",
|
||||
"version": "1.3.9",
|
||||
"version": "1.1.0",
|
||||
"description": "Create and capture DNS and mDNS query and response packets to disk as binary and/or JSON. Options are similar to the Unix `dig` command.",
|
||||
"main": "index.js",
|
||||
"homepage": "https://git.coolaj86.com/coolaj86/dig.js",
|
||||
"bin": {
|
||||
"dig.js": "./bin/dig.js"
|
||||
"dig.js": "./bin/dig.js",
|
||||
"digd.js": "./bin/digd.js"
|
||||
},
|
||||
"scripts": {
|
||||
"test": "echo \"Error: no test specified\" && exit 1"
|
||||
},
|
||||
"repository": {
|
||||
"type": "git",
|
||||
"url": "git://git.coolaj86.com:coolaj86/dig.js.git"
|
||||
"url": "git@git.daplie.com:Daplie/dig.js.git"
|
||||
},
|
||||
"keywords": [
|
||||
"mdig",
|
||||
|
|
@ -25,8 +25,6 @@
|
|||
"dig",
|
||||
"dns",
|
||||
"mdns",
|
||||
"dns0x20",
|
||||
"0x20",
|
||||
"lint",
|
||||
"capture",
|
||||
"create",
|
||||
|
|
@ -34,16 +32,14 @@
|
|||
"binary",
|
||||
"json"
|
||||
],
|
||||
"author": "AJ ONeal <coolaj86@gmail.com> (https://coolaj86.com/)",
|
||||
"author": "AJ ONeal <aj@daplie.com> (https://daplie.com/)",
|
||||
"license": "(MIT OR Apache-2.0)",
|
||||
"bugs": {
|
||||
"url": "https://git.coolaj86.com/coolaj86/dig.js/issues"
|
||||
"url": "https://git.daplie.com/Daplie/dig.js/issues"
|
||||
},
|
||||
"homepage": "https://git.daplie.com/Daplie/dig.js",
|
||||
"dependencies": {
|
||||
"cli": "^1.0.1",
|
||||
"dns-suite": "git+https://git.coolaj86.com/coolaj86/dns-suite.js#v1.2"
|
||||
},
|
||||
"optionalDependencies": {
|
||||
"hexdump.js": "git+https://git.coolaj86.com/coolaj86/hexdump.js#v1.0.4"
|
||||
"dns-suite": "git+https://git@git.daplie.com:Daplie/dns-suite#v1"
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue