coolaj86
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dns-suite.js
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WIP output byte indexes while parsing

This commit is contained in:
AJ ONeal 2017-10-09 10:56:02 -06:00
parent 633e60d643
commit b5af1bfe24
1 changed files with 20 additions and 15 deletions
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35
bin/debug.js
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@ -45,8 +45,6 @@ console.log('ancount', ancount);
console.log('nscount', nscount); console.log('nscount', nscount);
console.log('arcount', arcount); console.log('arcount', arcount);
var total = 12;
function unpackQuestion(dv, total, len) { function unpackQuestion(dv, total, len) {
var qnames = []; var qnames = [];
var labelLen; var labelLen;
@ -77,10 +75,11 @@ function unpackQuestion(dv, total, len) {
console.log('label:', label); console.log('label:', label);
qnames.push(label); qnames.push(label);
} }
console.log('QNAME:', qnames.join('.')); // leading length and (potentially) trailing null
console.log('QTYPE:', dv.getUint16(total), false); console.log('QNAME (len ' + (qnames.join('.').length + 1 + (labelLen ? 0 : 1)) + '):', qnames.join('.'));
console.log('QTYPE (len 2):', dv.getUint16(total, false));
total += 2; total += 2;
console.log('QCLASS:', dv.getUint16(total), false); console.log('QCLASS (len 2):', dv.getUint16(total, false));
total += 2; total += 2;
return { return {
@ -89,8 +88,9 @@ function unpackQuestion(dv, total, len) {
}; };
} }
var q = { total: total }; var q = { total: 12 };
function mapChar(ch) { return String.fromCharCode(ch) + '(' + ch + ')'; } function mapChar(ch) { return JSON.stringify(String.fromCharCode(ch)) + '(' + ch + ')'; }
console.log(''); console.log('');
console.log('//////////////////'); console.log('//////////////////');
@ -98,7 +98,8 @@ console.log('// QUESTION //');
console.log('//////////////////'); console.log('//////////////////');
console.log(''); console.log('');
for (count = 0; count < qdcount; count += 1) { for (count = 0; count < qdcount; count += 1) {
console.log('Question', count + 1, 'of', qdcount); console.log('');
console.log('Question ' + (count + 1) + ' of ' + qdcount + ' (byte index: ' + q.total + ')');
q = unpackQuestion(dv, q.total, ab.byteLength); q = unpackQuestion(dv, q.total, ab.byteLength);
console.log(''); console.log('');
} }
@ -109,7 +110,8 @@ console.log('// ANSWER //');
console.log('//////////////////'); console.log('//////////////////');
console.log(''); console.log('');
for (count = 0; count < ancount; count += 1) { for (count = 0; count < ancount; count += 1) {
console.log('Answer', count + 1, 'of', ancount); console.log('');
console.log('Answer', count + 1, 'of', ancount + ' (byte index: ' + q.total + ')');
q = unpackQuestion(dv, q.total, ab.byteLength); q = unpackQuestion(dv, q.total, ab.byteLength);
console.log(''); console.log('');
} }
@ -121,16 +123,18 @@ console.log('// AUTHORITY //');
console.log('//////////////////'); console.log('//////////////////');
console.log(''); console.log('');
for (count = 0; count < nscount; count += 1) { for (count = 0; count < nscount; count += 1) {
console.log('Authority', count + 1, 'of', nscount); console.log('');
console.log('Authority', count + 1, 'of', nscount + ' (byte index: ' + q.total + ')');
q = unpackQuestion(dv, q.total, ab.byteLength); q = unpackQuestion(dv, q.total, ab.byteLength);
console.log('ttl:', dv.getUint32(q.total, false)); console.log('ttl (len 4):', dv.getUint32(q.total, false));
q.total += 4; q.total += 4;
q.rdlength = dv.getUint16(q.total, false); q.rdlength = dv.getUint16(q.total, false);
console.log('rdlen:', q.rdlength); console.log('rdlen (len 2):', q.rdlength);
q.total += 2; q.total += 2;
console.log('rrdata:'); console.log('rrdata (len ' + q.rdlength + '):');
console.log([].slice.call(new Uint8Array(ab), q.total, q.total + q.rdlength).map(mapChar)); console.log([].slice.call(new Uint8Array(ab), q.total, q.total + q.rdlength).map(mapChar).join(' '));
q.total += q.rdlength; q.total += q.rdlength;
console.log('');
} }
console.log(''); console.log('');
@ -139,7 +143,8 @@ console.log('// ADDITIONAL //');
console.log('//////////////////'); console.log('//////////////////');
console.log(''); console.log('');
for (count = 0; count < arcount; count += 1) { for (count = 0; count < arcount; count += 1) {
console.log('Additional', count + 1, 'of', arcount); console.log('');
console.log('Additional', count + 1, 'of', arcount + ' (byte index: ' + q.total + ')');
q = unpackQuestion(dv, q.total, ab.byteLength); q = unpackQuestion(dv, q.total, ab.byteLength);
console.log(''); console.log('');
} }