56 lines
1.1 KiB
JavaScript
56 lines
1.1 KiB
JavaScript
if(typeof(atob) === 'undefined') {
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var atob = require("atob");
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}
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(function(){
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'use strict';
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var encodedPacket = "1MOyoQIABAAAAAAAAAAAAAAABAABAAAAKPfFWWMZCwBRAAAAUQAAAExg3kp+6eSzGAoxpggARQAAQ66CQABAEXgXCgAAEAoAAAG90gA1AC+qDJSEAQAAAQAAAAAAAAphc3NldHMtY2RuBmdpdGh1YgNjb20AAAEAAQ=="
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//convert to binary string to create ArrayBuffer
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var packet = atob(encodedPacket);
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console.log("tcpdump length:", packet.length);
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//The first 40 bytes are the tcpdump header
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packet = packet.slice(40);
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console.log("UDP length:", packet.length);
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//We now have the raw UDP packet!
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var buffer = new ArrayBuffer(packet.length);
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var view = new DataView(buffer)
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for(var i = 0; i < packet.length; ++i) {
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view.setUint8(i, packet.charCodeAt(i), true);
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}
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for(i = 0; i < packet.length; ++i) {
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}
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console.log("Result:", parseDNSHeader(view));
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//Parse DNS Header (given the UDP payload)
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function parseDNSHeader(view) {
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return {
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MessageID: getHId(view)
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};
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}
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function getHId(view) {
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return view.getUint16(0, false)
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}
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function getQR(view) {
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}
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function getOPCode(view) {
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}
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function getAA(view) {
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}
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function getTC(view) {
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}
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})();
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