Added 'Parse TCP' operation

src/core/lib/Protocol.mjs

@@ -0,0 +1,47 @@
+/**
+ * Protocol parsing functions.
+ *
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2022
+ * @license Apache-2.0
+ */
+
+import BigNumber from "bignumber.js";
+import {toHexFast} from "../lib/Hex.mjs";
+
+/**
+ * Recursively displays a JSON object as an HTML table
+ *
+ * @param {Object} obj
+ * @returns string
+ */
+export function objToTable(obj, nested=false) {
+    let html = `<table
+        class='table table-sm table-nonfluid ${nested ? "mb-0 table-borderless" : "table-bordered"}'
+        style='table-layout: fixed; ${nested ? "margin: -1px !important;" : ""}'>`;
+    if (!nested)
+        html += `<tr>
+            <th>Field</th>
+            <th>Value</th>
+        </tr>`;
+
+    for (const key in obj) {
+        html += `<tr><td style='word-wrap: break-word'>${key}</td>`;
+        if (typeof obj[key] === "object")
+            html += `<td style='padding: 0'>${objToTable(obj[key], true)}</td>`;
+        else
+            html += `<td>${obj[key]}</td>`;
+        html += "</tr>";
+    }
+    html += "</table>";
+    return html;
+}
+
+/**
+ * Converts bytes into a BigNumber string
+ * @param {Uint8Array} bs
+ * @returns {string}
+ */
+export function bytesToLargeNumber(bs) {
+    return BigNumber(toHexFast(bs), 16).toString();
+}