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dns-suite.js
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bug #4 add cp support

This commit is contained in:
AJ ONeal 2017-01-25 14:47:14 -07:00
parent 5e1fff748e
commit 736ea21b54
1 changed files with 14 additions and 0 deletions
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14
pure-parser.js
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@ -42,6 +42,10 @@ pdns.unpackQname = function (ab, ptr, q) {
, cpcount: 0 , cpcount: 0
}; };
if (q.cpcount > 25) {
throw new Error("compression pointer loop detected (over 25 pointers seems like a loop)");
}
do { do {
label.length = 0; label.length = 0;
len = ui8[total]; len = ui8[total];
@ -53,6 +57,12 @@ pdns.unpackQname = function (ab, ptr, q) {
console.log('ptr to', cpptr); console.log('ptr to', cpptr);
console.log('label len', cplen); console.log('label len', cplen);
console.log('label', Buffer.from(ui8.slice(cpptr + 1, cpptr + 1 + cplen)).toString('ascii')); console.log('label', Buffer.from(ui8.slice(cpptr + 1, cpptr + 1 + cplen)).toString('ascii'));
// we're not coming back!
ptr = cpptr;
q.cpcount += 1;
q.byteLength += 2; // cp and len
return pdns.unpackQname(ab, ptr, q);
throw new Error("discovered a compression pointer at byte " + total throw new Error("discovered a compression pointer at byte " + total
+ " pointing to byte " + ui8[total + 1] + " pointing to byte " + ui8[total + 1]
+ ", but compression pointer support is not yet implemented" + ", but compression pointer support is not yet implemented"
@ -127,6 +137,8 @@ pdns.unpack = function (ab) {
var ototal = total; var ototal = total;
var data = new Uint8Array(ab).slice(total); var data = new Uint8Array(ab).slice(total);
var q = pdns.unpackQname(ab, total); var q = pdns.unpackQname(ab, total);
console.log('unpackQuestion:');
console.log(q);
total += q.byteLength; total += q.byteLength;
if (ab.byteLength - total < 4) { if (ab.byteLength - total < 4) {
@ -149,6 +161,8 @@ pdns.unpack = function (ab) {
var ototal = total; var ototal = total;
var data = new Uint8Array(ab).slice(total); var data = new Uint8Array(ab).slice(total);
var q = pdns.unpackQname(ab, total); var q = pdns.unpackQname(ab, total);
console.log('unpackAnswer:');
console.log(q);
total += q.byteLength; total += q.byteLength;