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DNS-SD, debug
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@veniware
veniware committed Aug 12, 2024
1 parent 2c89a80 commit 49716be
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Showing 4 changed files with 95 additions and 180 deletions.
2 changes: 1 addition & 1 deletion Protest/Front/dns-sd.js
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Original file line number Diff line number Diff line change
Expand Up @@ -402,7 +402,7 @@ class DnsSD extends Console {

const string = document.createElement("div");
string.style.display = "inline-block";
string.style.paddingRight = "8px";
string.style.paddingRight = "4px";
string.textContent = json.answer[i].name;

box.append(label, string);
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184 changes: 34 additions & 150 deletions Protest/Front/hexviewer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -351,7 +351,7 @@ class HexViewer extends Window {

switch (protocol) {
case "dns" : this.PopulateDnsLabels(hexContainer, charContainer, data); break;
case "mdns" : this.PopulateMdnsLabels(hexContainer, charContainer, data); break;
case "mdns" : this.PopulateDnsLabels(hexContainer, charContainer, data); break;
case "ntp" : this.PopulateNtpLabels(hexContainer, charContainer, data); break;
case "dhcp" : this.PopulateDhcpLabels(hexContainer, charContainer, data); break;
}
Expand Down Expand Up @@ -477,7 +477,7 @@ class HexViewer extends Window {

return element;
}

PopulateDnsLabels(hexContainer, charContainer, stream) {
const transactionId = stream[0].toString(16).padStart(2,"0") + stream[1].toString(16).padStart(2,"0");
this.PopulateLabel(`Transaction ID: 0x${transactionId}`, 0, hexContainer, charContainer, 0, 2);
Expand Down Expand Up @@ -508,10 +508,10 @@ class HexViewer extends Window {
}

const qCount = stream[4] << 8 | stream[5];
this.PopulateLabel(`Questions counter: ${qCount}`, 0, hexContainer, charContainer, 4, 2);
this.PopulateLabel(`Questions: ${qCount}`, 0, hexContainer, charContainer, 4, 2);

const anCount = stream[6] << 8 | stream[7];
this.PopulateLabel(`Answers counter: ${anCount}`, 0, hexContainer, charContainer, 6, 2);
this.PopulateLabel(`Answers RRs: ${anCount}`, 0, hexContainer, charContainer, 6, 2);

const auCount = stream[8] << 8 | stream[9];
this.PopulateLabel(`Authority RRs: ${auCount}`, 0, hexContainer, charContainer, 8, 2);
Expand All @@ -523,23 +523,27 @@ class HexViewer extends Window {
let count = 0;

while (offset < stream.length && count < qCount) { //questions
let start = offset;
let end = offset;
const start = offset;

switch (stream[offset]) {
case 0xc0: //pointer
let end = start;
if (stream[offset] === 0xC0) { //pointer
end += 2;
break;
}
else {
while (end < stream.length && stream[end] !== 0 && stream[end] !== 0xC0) {
end++;
}

default:
while (end < stream.length && stream[end] !== 0) {
if (stream[end] === 0) { //null termination
end++;
}
break;
else if (stream[end] === 0xC0) { //pointer
end += 2;
}
}

const first = this.PopulateLabel("Name", 1, hexContainer, charContainer, start, end - start);
offset = end + 1;
const first = this.PopulateLabel("Name", 1, hexContainer, charContainer, start, end - start - 1);
offset = end;

let type = (stream[offset] << 8) | stream[offset+1];
this.PopulateLabel(`Type: ${type} ${HexViewer.DNS_RECORD_TYPES[type] ? `(${HexViewer.DNS_RECORD_TYPES[type]})` : ""}`, 1, hexContainer, charContainer, offset, 2);
Expand All @@ -556,23 +560,30 @@ class HexViewer extends Window {
count++;
}

while (offset < stream.length && count < qCount + anCount + auCount + adCount) { //answers
const totalRecords = qCount + anCount + auCount + adCount;
while (offset < stream.length && count < totalRecords) { //records
let start = offset;
let end = offset;

switch (stream[offset]) {
case 0xc0: //pointer
if (stream[offset] === 0xC0) { //pointer
console.log(this.hexBox.childNodes[offset]);
end += 2;
break;
}
else {
while (end < stream.length && stream[end] !== 0 && stream[end] !== 0xC0) {
end++;
}

default:
while (end < stream.length && stream[end] !== 0) {
if (stream[end] === 0) { //null termination
end++;
}
end++; //null termination
break;
else if (stream[end] === 0xC0) { //pointer
end += 2;
}
}

console.log(offset.toString(16).padStart(2, "0"), end.toString(16).padStart(2, "0"));

const first = this.PopulateLabel("Name", 1, hexContainer, charContainer, start, end - start);

offset = end;
Expand Down Expand Up @@ -618,135 +629,8 @@ class HexViewer extends Window {
this.PopulateLabel("Answer", 1, hexContainer, charContainer, offset, len);
break;
}
offset += len;

end = offset;

let element;
if (count < qCount + anCount) {
element = this.PopulateLabel("Answer: ", 0, hexContainer, charContainer, start, end - start);
}
else if (count < qCount + anCount + auCount) {
element = this.PopulateLabel("Authority: ", 0, hexContainer, charContainer, start, end - start);
}
else if (count < qCount + anCount + auCount + adCount) {
element = this.PopulateLabel("Additional: ", 0, hexContainer, charContainer, start, end - start);
}
this.list.insertBefore(element, first);

count++;
}
}

PopulateMdnsLabels(hexContainer, charContainer, stream, index) {
if (!(stream[index] instanceof Array)) {
this.PopulateDnsLabels(hexContainer, charContainer, stream);
return;
}

const transactionId = stream[index][0].toString(16).padStart(2,"0") + stream[index][1].toString(16).padStart(2,"0");
this.PopulateLabel(`Transaction ID: 0x${transactionId}`, 0, hexContainer, charContainer, 0, 2);

const flags = stream[index][2].toString(16).padStart(2,"0") + stream[index][3].toString(16).padStart(2,"0");
this.PopulateLabel(`Flags: 0x${flags}`, 0, hexContainer, charContainer, 2, 2);

let isResponse = (stream[index][2] & 0b10000000) > 0;
let options = (stream[index][2] & 0b01111000) >> 3;
let isAuthoritative = (stream[index][2] & 0b00000100) > 0;
let isTruncated = (stream[index][2] & 0b00000010) > 0;
let isRecursive = (stream[index][2] & 0b00000001) > 0;
this.PopulateLabel(`Response: ${isResponse}`, 1, hexContainer, charContainer, 2, 1);
this.PopulateLabel(`Options: ${options}`, 1, hexContainer, charContainer, 2, 1);
this.PopulateLabel(`Authoritative: ${isAuthoritative}`, 1, hexContainer, charContainer, 2, 1);
this.PopulateLabel(`Truncated: ${isTruncated}`, 1, hexContainer, charContainer, 2, 1);
this.PopulateLabel(`Recursive: ${isRecursive}`, 1, hexContainer, charContainer, 2, 1);

if (isResponse) {
let isRecursionAvailable = (stream[index][3] & 0b10000000) > 0;
let isAnswerAuthenticated = (stream[index][3] & 0b00100000) > 0;
let nonAuthenticatedData = (stream[index][3] & 0b00010000) > 0;
let replyCode = stream[index][3] & 0b00001111;
this.PopulateLabel(`Recursion is available: ${isRecursionAvailable}`, 1, hexContainer, charContainer, 3, 1);
this.PopulateLabel(`Answer is authenticated: ${isAnswerAuthenticated}`, 1, hexContainer, charContainer, 3, 1);
this.PopulateLabel(`Non authenticated data: ${nonAuthenticatedData}`, 1, hexContainer, charContainer, 3, 1);
this.PopulateLabel(`Reply code: ${replyCode}`, 1, hexContainer, charContainer, 3, 1);
}

const qCount = stream[index][4] << 8 | stream[index][5];
this.PopulateLabel(`Questions counter: ${qCount}`, 0, hexContainer, charContainer, 4, 2);

const anCount = stream[index][6] << 8 | stream[index][7];
this.PopulateLabel(`Answers counter: ${anCount}`, 0, hexContainer, charContainer, 6, 2);

const auCount = stream[index][8] << 8 | stream[index][9];
this.PopulateLabel(`Authority RRs: ${auCount}`, 0, hexContainer, charContainer, 8, 2);

const adCount = stream[index][10] << 8 | stream[index][11];
this.PopulateLabel(`Additional RRs: ${adCount}`, 0, hexContainer, charContainer, 10, 2);

let offset = 12;
let count = 0;
while (offset < stream[index].length && count < qCount + anCount + auCount + adCount) {
let start = offset;
let end = offset;

switch (stream[index][offset]) {
case 0xc0: //pointer
end += 2;
break;

default:
while (end < stream[index].length && stream[index][end] !== 0) {
end++;
}
break;
}

const first = this.PopulateLabel("Name", 1, hexContainer, charContainer, start, end - start);

offset = end + 1;

let type = (stream[index][offset] << 8) | stream[index][offset+1];
this.PopulateLabel(`Type: ${type} ${HexViewer.DNS_RECORD_TYPES[type] ? `(${HexViewer.DNS_RECORD_TYPES[type]})` : ""}`, 1, hexContainer, charContainer, offset, 2);
offset += 2;

let class_ = (stream[index][offset] << 8) | stream[index][offset+1];
this.PopulateLabel(`Class: ${class_} ${HexViewer.DNS_CLASSES[class_] ? `(${HexViewer.DNS_CLASSES[class_]})` : ""}`, 1, hexContainer, charContainer, offset, 2);
offset += 2;

let ttl = (stream[index][offset] << 24) | (stream[index][offset+1] << 16) | (stream[index][offset+2] << 8) | stream[index][offset+3];
this.PopulateLabel(`TTL: ${ttl}`, 1, hexContainer, charContainer, offset, 4);
offset += 4;

let len = (stream[index][offset] << 8) | stream[index][offset+1];
this.PopulateLabel(`Length: ${len}`, 1, hexContainer, charContainer, offset, 2);
offset += 2;

let data;
switch (type) {
case 1: //A
if (len === 4) {
data = `${stream[index][offset]}.${stream[index][offset+1]}.${stream[index][offset+2]}.${stream[index][offset+3]}`;
this.PopulateLabel(data, 1, hexContainer, charContainer, offset, len);
}
break;

case 28: //AAAA
if (len === 16) {
data = "";
for (let j = 0; j < 16; j+=2) {
if (j > 0) data += ":";
data += stream[index][offset + j].toString(16).padStart(2, "0");
data += stream[index][offset + j + 1].toString(16).padStart(2, "0");
}
this.PopulateLabel(data, 1, hexContainer, charContainer, offset, len);
}
break;

default:
this.PopulateLabel("Answer", 1, hexContainer, charContainer, offset, len);
break;
}
//console.log("offset = " + offset + " + " + len);
offset += len;

end = offset;
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10 changes: 10 additions & 0 deletions Protest/Http/Listener.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -205,6 +205,11 @@ public void Stop() {
}

private void ListenerCallback(IAsyncResult result) {
#if !DEBUG
try
#endif
{

HttpListenerContext ctx = listener.EndGetContext(result);

//Cross Site Request Forgery protection
Expand Down Expand Up @@ -290,6 +295,11 @@ private void ListenerCallback(IAsyncResult result) {

ctx.Response.StatusCode = (int)HttpStatusCode.NotFound;
ctx.Response.Close();

}
#if !DEBUG
catch { }
#endif
}

private static Dictionary<string, string> ParseQuery(string queryString) {
Expand Down
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