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dns-suite.js
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scoping query

This commit is contained in:
AJ ONeal 2017-01-21 10:45:45 -07:00
parent 676dbabfbc
commit 6c08537f3e
2 changed files with 41 additions and 31 deletions
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5
pure-parser-cli.js
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@ -30,5 +30,8 @@ fs.readFileAsync(filename, null).then(function (nb) {
// nb is a Uint8Array (ArrayBufferView) for nb.buffer // nb is a Uint8Array (ArrayBufferView) for nb.buffer
// nb.buffer is the actual ArrayBuffer // nb.buffer is the actual ArrayBuffer
pdns.unpack(nb.buffer); var packet = pdns.unpack(nb.buffer);
console.log('[packet]', nb.byteLength, 'bytes:');
console.log(packet);
}); });

35
pure-parser.js
View File

@ -116,17 +116,17 @@ pdns.unpack = function (ab) {
var nscount = dv.getUint16(8); // authority count var nscount = dv.getUint16(8); // authority count
var arcount = dv.getUint16(10); // additional count var arcount = dv.getUint16(10); // additional count
var total = 12; var total = 12;
var data;
var i; var i;
var q; var rec;
//console.log('datalen', data.length); //console.log('datalen', data.length);
console.log(dv, qdcount); console.log(dv, qdcount);
// TODO move to pdns.unpackQuestion to make testable // TODO move to pdns.unpackQuestion to make testable
function unpackQuestion() { function unpackQuestion(ab, dv, total) {
data = new Uint8Array(ab).slice(total); var ototal = total;
q = pdns.unpackQname(data); var data = new Uint8Array(ab).slice(total);
var q = pdns.unpackQname(data);
total += q.name.length + 2; // account for leading and trailing string length byte total += q.name.length + 2; // account for leading and trailing string length byte
@ -145,13 +145,14 @@ pdns.unpack = function (ab) {
console.log('class', q.class, total); console.log('class', q.class, total);
total += 2; total += 2;
console.log('total', total); console.log('total', total);
q.qtotal = total - ototal;
header.questions.push(q); return q;
} }
function unpackAnswer(answers) { function unpackAnswer(ab, dv, total) {
data = new Uint8Array(ab).slice(total); var ototal = total;
q = pdns.unpackQname(data); var data = new Uint8Array(ab).slice(total);
var q = pdns.unpackQname(data);
total += q.name.length + 2; // account for leading and trailing string length byte total += q.name.length + 2; // account for leading and trailing string length byte
@ -190,7 +191,8 @@ pdns.unpack = function (ab) {
total += q.rdlength; total += q.rdlength;
console.log('total', total); console.log('total', total);
answers.push(q); q.qtotal = total - ototal;
return q;
} }
header.id = id; header.id = id;
@ -198,13 +200,17 @@ pdns.unpack = function (ab) {
console.log('qdcount', qdcount); console.log('qdcount', qdcount);
header.questions = []; header.questions = [];
for (i = 0; i < qdcount; i += 1) { for (i = 0; i < qdcount; i += 1) {
unpackQuestion(); rec = unpackQuestion(ab, dv, total);
total += rec.qtotal;
header.questions.push(rec);
} }
console.log('ancount', ancount); console.log('ancount', ancount);
header.answers = []; header.answers = [];
for (i = 0; i < ancount; i += 1) { for (i = 0; i < ancount; i += 1) {
unpackAnswer(header.answers); rec = unpackAnswer(ab, dv, total);
total += rec.qtotal;
header.answers.push(rec);
} }
console.log('nscount', nscount); console.log('nscount', nscount);
@ -219,5 +225,6 @@ pdns.unpack = function (ab) {
unpackAnswer(header.additional); unpackAnswer(header.additional);
} }
console.log('[packet]', header); header.total = total;
return header;
}; };