WIP add cp, add server
This commit is contained in:
AJ ONeal
parent
b5af1bfe24
commit
5fff05a76f
84
bin/debug.js
84
bin/debug.js
@ -1,3 +1,8 @@
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#!/usr/bin/env node
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// node bin/debug.js ../dig.js/blar.DOEsNteXiST.AJ.OnEal.DAplIE.me.any.0.bin
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// node bin/debugd.js ../dig.js/blar.DOEsNteXiST.AJ.OnEal.DAplIE.me.any.0.bin
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// dig @localhost -p 65053 ANY DOEsNteXiST.AJ.OnEal.DAplIE.me
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(function () {
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'use strict';
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@ -17,6 +22,10 @@ console.log('// HEADER //');
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console.log('//////////////////');
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console.log('');
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console.log('');
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console.log('byte index 0x00');
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console.log('');
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console.log('id (int)', dv.getUint16(0));
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var flags = dv.getUint16(2, false);
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@ -45,9 +54,14 @@ console.log('ancount', ancount);
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console.log('nscount', nscount);
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console.log('arcount', arcount);
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function unpackQuestion(dv, total, len) {
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function unpackQuestionLabels(opts) {
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var dv = opts.dv;
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//var origTotal = opts.total;
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var total = opts.total;
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var len = opts.len;
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var qnames = [];
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var labelLen;
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while (true) {
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if (total >= len) {
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break;
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@ -58,29 +72,46 @@ function unpackQuestion(dv, total, len) {
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break;
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}
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if (192 === labelLen) {
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console.log('ERROR: Compression pointer found');
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console.log(dv.getUint8(total, false));
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console.log(dv.getUint8(dv.getUint8(total + 0, false), false));
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console.log(dv.getUint8(dv.getUint8(total + 1, false), false));
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console.log(dv.getUint8(dv.getUint8(total + 2, false), false));
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var pointer = dv.getUint8(total, false);
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console.log('Found a pointer to'
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+ ' 0x' + pointer.toString(16) + ' (' + pointer + ')'
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+ ' at byte index'
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+ ' 0x' + leftPad(total.toString(16)) + ' (' + total + ')'
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+ ' which back-references:'
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);
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console.log('-4', dv.getUint8(pointer - 4, false));
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console.log('-3', dv.getUint8(pointer - 3, false));
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console.log('-2', dv.getUint8(pointer - 2, false));
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console.log('-1', dv.getUint8(pointer - 1, false));
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console.log(' 0', dv.getUint8(pointer + 0, false));
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console.log('+1', dv.getUint8(pointer + 1, false));
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console.log('+2', dv.getUint8(pointer + 2, false));
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console.log('bytes near the pointer itself (not what it points to) are:');
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console.log('-2', dv.getUint8(total - 2, false));
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console.log('-1', dv.getUint8(total - 1, false));
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console.log(' 0', dv.getUint8(total + 0, false));
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console.log('+1', dv.getUint8(total + 1, false));
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console.log('+2', dv.getUint8(total + 2, false));
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console.log('+3', dv.getUint8(total + 3, false));
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console.log('+4', dv.getUint8(total + 4, false));
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//total += 1;
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opts.cp = true;
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qnames.push(unpackQuestionLabels({ dv: dv, total: pointer, len: len }).qname);
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total += 1;
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break;
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}
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} else {
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var i;
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var label = '';
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console.log('label len', labelLen);
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for (i = 0; i < labelLen; i += 1) {
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//console.log('total:', total, i);
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label += String.fromCharCode(dv.getUint8(total + i, false));
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}
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total += label.length;
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console.log('label:', label);
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qnames.push(label);
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}
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// leading length and (potentially) trailing null
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console.log('QNAME (len ' + (qnames.join('.').length + 1 + (labelLen ? 0 : 1)) + '):', qnames.join('.'));
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console.log('QTYPE (len 2):', dv.getUint16(total, false));
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total += 2;
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console.log('QCLASS (len 2):', dv.getUint16(total, false));
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total += 2;
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}
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return {
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total: total
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@ -88,8 +119,23 @@ function unpackQuestion(dv, total, len) {
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};
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}
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function unpackQuestion(dv, total, len) {
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var result = unpackQuestionLabels({ dv: dv, total: total, len: len });
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// leading length and (potentially) trailing null
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console.log('QNAME (len ' + (result.total - total) + '):', result.qname, result.cp ? '(pointer)' : '');
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console.log('QTYPE (len 2):', dv.getUint16(result.total, false));
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result.total += 2;
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console.log('QCLASS (len 2):', dv.getUint16(result.total, false));
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result.total += 2;
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return result;
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}
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var q = { total: 12 };
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function mapChar(ch) { return JSON.stringify(String.fromCharCode(ch)) + '(' + ch + ')'; }
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function leftPad(ch) { ch = ch.toString(); while (ch.length < 2) { ch = '0' + ch; } return ch; }
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console.log('');
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@ -99,7 +145,7 @@ console.log('//////////////////');
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console.log('');
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for (count = 0; count < qdcount; count += 1) {
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console.log('');
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console.log('Question ' + (count + 1) + ' of ' + qdcount + ' (byte index: ' + q.total + ')');
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console.log('Question ' + (count + 1) + ' of ' + qdcount + ' (byte index: 0x' + leftPad(q.total.toString(16)) + ' ' + q.total + ')');
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q = unpackQuestion(dv, q.total, ab.byteLength);
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console.log('');
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}
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@ -111,7 +157,7 @@ console.log('//////////////////');
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console.log('');
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for (count = 0; count < ancount; count += 1) {
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console.log('');
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console.log('Answer', count + 1, 'of', ancount + ' (byte index: ' + q.total + ')');
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console.log('Answer', count + 1, 'of', ancount + ' (byte index: 0x' + q.total.toString(16) + ' ' + q.total + ')');
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q = unpackQuestion(dv, q.total, ab.byteLength);
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console.log('');
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}
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@ -124,7 +170,7 @@ console.log('//////////////////');
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console.log('');
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for (count = 0; count < nscount; count += 1) {
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console.log('');
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console.log('Authority', count + 1, 'of', nscount + ' (byte index: ' + q.total + ')');
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console.log('Authority', count + 1, 'of', nscount + ' (byte index: 0x' + q.total.toString(16) + ' ' + q.total + ')');
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q = unpackQuestion(dv, q.total, ab.byteLength);
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console.log('ttl (len 4):', dv.getUint32(q.total, false));
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q.total += 4;
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@ -144,10 +190,14 @@ console.log('//////////////////');
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console.log('');
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for (count = 0; count < arcount; count += 1) {
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console.log('');
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console.log('Additional', count + 1, 'of', arcount + ' (byte index: ' + q.total + ')');
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console.log('Additional', count + 1, 'of', arcount + ' (byte index: 0x' + q.total.toString(16) + ' ' + q.total + ')');
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q = unpackQuestion(dv, q.total, ab.byteLength);
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console.log('');
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}
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console.log('');
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console.log('total bytes', dv.byteLength);
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console.log('total bytes read', q.total);
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console.log('');
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}());
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45
bin/debugd.js
Normal file
45
bin/debugd.js
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@ -0,0 +1,45 @@
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#!/usr/bin/env
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(function () {
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'use strict';
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var cli = { port: 65053, address: null, udp6: false, bin: process.argv[2] };
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var dgram = require('dgram');
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var server = dgram.createSocket({
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type: cli.udp6 ? 'udp6' : 'udp4'
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, reuseAddr: true
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});
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var handlers = {};
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var bin = require('fs').readFileSync(cli.bin, null);
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handlers.onMessage = function (nb, rinfo) {
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console.log('[DEBUG] got a message');
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// replace the id to match
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bin[0] = nb[0];
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bin[1] = nb[1];
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server.send(bin, rinfo.port, rinfo.address, function () {
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console.log('[DEBUG] sent response');
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});
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};
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handlers.onListening = function () {
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/*jshint validthis:true*/
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var server = this;
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if (cli.mdns || '224.0.0.251' === cli.nameserver) {
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server.setBroadcast(true);
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server.addMembership(cli.nameserver);
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}
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console.log('');
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console.log('Bound and Listening:');
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console.log(server.address().address + '#' + server.address().port + ' (' + server.type + ')');
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};
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server.bind({
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port: cli.port
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, address: cli.address
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});
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server.on('listening', handlers.onListening);
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}());
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