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Added 'Parse TCP' operation

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n1474335 2022-05-30 18:06:15 +01:00
parent 477e4a7421
commit a895d1d82a
14 changed files with 430 additions and 81 deletions
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53
src/core/operations/ParseUDP.mjs
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@ -6,7 +6,9 @@
import Operation from "../Operation.mjs";
import Stream from "../lib/Stream.mjs";
import {toHex} from "../lib/Hex.mjs";
import {toHexFast, fromHex} from "../lib/Hex.mjs";
import {objToTable} from "../lib/Protocol.mjs";
import Utils from "../Utils.mjs";
import OperationError from "../errors/OperationError.mjs";
/**
@ -24,58 +26,61 @@ class ParseUDP extends Operation {
this.module = "Default";
this.description = "Parses a UDP header and payload (if present).";
this.infoURL = "https://wikipedia.org/wiki/User_Datagram_Protocol";
this.inputType = "ArrayBuffer";
this.inputType = "string";
this.outputType = "json";
this.presentType = "html";
this.args = [];
this.args = [
{
name: "Input format",
type: "option",
value: ["Hex", "Raw"]
}
];
}
/**
* @param {ArrayBuffer} input
* @param {string} input
* @param {Object[]} args
* @returns {Object}
*/
run(input, args) {
if (input.byteLength < 8) {
throw new OperationError("Need 8 bytes for a UDP Header");
const format = args[0];
if (format === "Hex") {
input = fromHex(input);
} else if (format === "Raw") {
input = Utils.strToArrayBuffer(input);
} else {
throw new OperationError("Unrecognised input format.");
}
const s = new Stream(new Uint8Array(input));
if (s.length < 8) {
throw new OperationError("Need 8 bytes for a UDP Header");
}
// Parse Header
const UDPPacket = {
"Source port": s.readInt(2),
"Destination port": s.readInt(2),
"Length": s.readInt(2),
"Checksum": toHex(s.getBytes(2), "")
"Checksum": "0x" + toHexFast(s.getBytes(2))
};
// Parse data if present
if (s.hasMore()) {
UDPPacket.Data = toHex(s.getBytes(UDPPacket.Length - 8), "");
UDPPacket.Data = "0x" + toHexFast(s.getBytes(UDPPacket.Length - 8));
}
return UDPPacket;
}
/**
* Displays the UDP Packet in a table style
* Displays the UDP Packet in a tabular style
* @param {Object} data
* @returns {html}
*/
present(data) {
const html = [];
html.push("<table class='table table-hover table-sm table-bordered table-nonfluid' style='table-layout: fixed'>");
html.push("<tr>");
html.push("<th>Field</th>");
html.push("<th>Value</th>");
html.push("</tr>");
for (const key in data) {
html.push("<tr>");
html.push("<td style=\"word-wrap:break-word\">" + key + "</td>");
html.push("<td>" + data[key] + "</td>");
html.push("</tr>");
}
html.push("</table>");
return html.join("");
return objToTable(data);
}
}