334 lines
16 KiB
JavaScript
334 lines
16 KiB
JavaScript
/**
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* @description MeshCentral MeshAgent
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* @author Ylian Saint-Hilaire
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* @copyright Intel Corporation 2019-2022
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* @license Apache-2.0
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* @version v0.0.1
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*/
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var fs = require('fs');
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var path = require('path');
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var worker = null;
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const NodeJSVer = Number(process.version.match(/^v(\d+\.\d+)/)[1]);
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var directRun = (require.main === module);
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function log() { if (directRun) { console.log(...arguments); } /*else { if (worker != null) { worker.parentPort.postMessage({ msg: arguments[0] }); } } */ }
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function log2() { if (directRun) { console.log(...arguments); } else { process.send(...arguments); } /*else { if (worker != null) { worker.parentPort.postMessage({ msg: arguments[0] }); } } */ }
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if (directRun && (NodeJSVer >= 12)) { const xworker = require('worker_threads'); try { if (xworker.isMainThread == false) { worker = xworker; } } catch (ex) { log(ex); } }
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function indexFile(infile) {
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var state = { recFileName: null, recFile: null, recFileSize: 0, recFilePtr: 0 };
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if (fs.existsSync(infile) == false) { log2("Missing file: " + infile); return; }
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state.recFileName = infile;
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state.recFileSize = fs.statSync(infile).size;
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if (state.recFileSize < 32) { log2("Invalid file size: " + infile); return; }
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log("Processing file: " + infile + ", " + state.recFileSize + " bytes.");
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state.recFile = fs.openSync(infile, 'r+');
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state.indexTime = 10; // Interval between indexes in seconds
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state.lastIndex = 0; // Last time an index was writen in seconds
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state.indexes = [];
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state.width = 0;
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state.height = 0;
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state.basePtr = null;
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readLastBlock(state, function (state, result, time, extras) {
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if (result == false) { log2("Invalid file: " + infile); return; }
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if (extras != null) { log2("File already indexed: " + infile); return; }
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state.lastTimeStamp = time;
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readNextBlock(state, processBlock);
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});
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}
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function createIndex(state, ptr) {
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var index = [];
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for (var i in state.screen) { if (index.indexOf(state.screen[i]) == -1) { index.push(state.screen[i]); } }
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index.sort(function (a, b) { return a - b });
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index.unshift(state.height);
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index.unshift(state.width);
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index.unshift(ptr - state.basePtr);
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state.indexes.push(index); // Index = [ Ptr, Width, Height, Block Pointers... ]
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//log('Index', state.lastIndex, index.length);
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//log('Index', index);
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state.lastIndex += 10;
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}
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function processBlock(state, block, err) {
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if (err != null) {
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// Error reading the next block, exit now.
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fs.close(state.recFile, function () {
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for (var i in state) { delete state[i]; } // Clear the state.
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log2("Error.");
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});
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return;
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}
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if (block == null) {
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// We are done, close this file.
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writeIndex(state, function () {
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fs.close(state.recFile, function () {
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for (var i in state) { delete state[i]; } // Clear the state.
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log2("Done.");
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});
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});
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return;
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}
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var elapseMilliSeconds = 0;
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if (state.startTime != null) { elapseMilliSeconds = (block.time - state.startTime); }
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var flagBinary = (block.flags & 1) != 0;
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var flagUser = (block.flags & 2) != 0;
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// Start indexing at the first type 2 block
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if ((state.basePtr == null) && (block.type == 2)) { state.basePtr = block.ptr; state.startTime = block.time; }
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// Check if we need to create one or more indexes
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while (((state.lastIndex + state.indexTime) * 1000) < elapseMilliSeconds) { createIndex(state, block.ptr); }
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if (block.type == 1) {
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// Metadata
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state.metadata = JSON.parse(block.data.toString());
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if (state.metadata.indexInterval != null) { log2("This file is already indexed."); return; }
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if (state.metadata.protocol != 2) { log2("Only remote desktop sessions can currently be indexed."); return; }
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state.metadataFlags = block.flags;
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state.metadataTime = block.time;
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state.recFileProtocol = state.metadata.protocol;
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state.dataStartPtr = state.recFilePtr;
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if (typeof state.recFileProtocol == 'string') { state.recFileProtocol = parseInt(state.recFileProtocol); }
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} else if ((block.type == 2) && flagBinary && !flagUser) {
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// Device --> User data
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if (state.recFileProtocol == 1) {
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// MeshCentral Terminal
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// TODO
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log('Terminal');
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} else if (state.recFileProtocol == 2) {
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// MeshCentral Remote Desktop
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// TODO
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if (block.data.length >= 4) {
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var command = block.data.readUInt16BE(0);
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var cmdsize = block.data.readUInt16BE(2);
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if ((command == 27) && (cmdsize == 8)) {
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// Jumbo packet
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if (block.data.length >= 12) {
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command = block.data.readUInt16BE(8);
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cmdsize = block.data.readUInt32BE(4);
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if (block.data.length == (cmdsize + 8)) {
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block.data = block.data.slice(8, block.data.length);
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} else {
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console.log('TODO-PARTIAL-JUMBO', command, cmdsize, block.data.length);
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return; // TODO
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}
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}
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}
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switch (command) {
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case 3: // Tile
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var x = block.data.readUInt16BE(4);
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var y = block.data.readUInt16BE(6);
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var dimensions = require('image-size')(block.data.slice(8));
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//log("Tile", x, y, dimensions.width, dimensions.height, block.ptr);
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//console.log(elapseSeconds);
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// Update the screen with the correct pointers.
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var sx = x/16, sy = y/16, sw = dimensions.width/16, sh = dimensions.height/16;
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for (var i = 0; i < sw; i++) {
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for (var j = 0; j < sh; j++) {
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var k = ((state.swidth * (j + sy)) + (i + sx));
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state.screen[k] = (block.ptr - state.basePtr);
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}
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}
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break;
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case 4: // Tile copy
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var x = block.data.readUInt16BE(4);
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var y = block.data.readUInt16BE(6);
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//log("TileCopy", x, y);
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break;
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case 7: // Screen Size, clear the screen state and computer the tile count
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state.width = block.data.readUInt16BE(4);
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state.height = block.data.readUInt16BE(6);
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state.swidth = state.width / 16;
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state.sheight = state.height / 16;
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if (Math.floor(state.swidth) != state.swidth) { state.swidth = Math.floor(state.swidth) + 1; }
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if (Math.floor(state.sheight) != state.sheight) { state.sheight = Math.floor(state.sheight) + 1; }
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state.screen = {};
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//log("ScreenSize", state.width, state.height, state.swidth, state.sheight, state.swidth * state.sheight);
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break;
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}
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//log('Desktop', command, cmdsize);
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}
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} else if (state.recFileProtocol == 101) {
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// Intel AMT KVM
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// TODO
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log('AMTKVM');
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}
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} else if ((block.type == 2) && flagBinary && flagUser) {
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// User --> Device data
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if (state.recFileProtocol == 101) {
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// Intel AMT KVM
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//if (rstr2hex(data) == '0000000008080001000700070003050200000000') { amtDesktop.bpp = 1; } // Switch to 1 byte per pixel.
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}
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}
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//console.log(block);
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readNextBlock(state, processBlock);
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}
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function writeIndex(state, func) {
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// Add the new indexes in extra metadata at the end of the file.
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var extraMetadata = {};
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extraMetadata.indexInterval = state.indexTime;
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extraMetadata.indexStartTime = state.startTime;
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extraMetadata.indexes = state.indexes;
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recordingEntry(state.recFile, 4, 0, state.lastTimeStamp, JSON.stringify(extraMetadata), function (state, len) {
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recordingEntry(state.recFile, 3, 0, state.recFileSize - 32, 'MeshCentralMCNDX', function (state) {
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func(state);
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}, state, state.recFileSize - 32 + len);
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}, state, state.recFileSize - 32);
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}
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// Record a new entry in a recording log
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function recordingEntry(fd, type, flags, time, data, func, tag, position) {
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try {
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if (typeof data == 'string') {
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// String write
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var blockData = Buffer.from(data), header = Buffer.alloc(16); // Header: Type (2) + Flags (2) + Size(4) + Time(8)
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header.writeInt16BE(type, 0); // Type (1 = Header, 2 = Network Data, 3 = End, 4 = Extra Metadata)
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header.writeInt16BE(flags, 2); // Flags (1 = Binary, 2 = User)
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header.writeInt32BE(blockData.length, 4); // Size
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header.writeIntBE(time, 10, 6); // Time
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var block = Buffer.concat([header, blockData]);
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if (typeof position == 'number') {
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fs.write(fd, block, 0, block.length, position, function () { func(tag, block.length); });
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} else {
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fs.write(fd, block, 0, block.length, function () { func(tag, block.length); });
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}
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} else {
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// Binary write
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var header = Buffer.alloc(16); // Header: Type (2) + Flags (2) + Size(4) + Time(8)
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header.writeInt16BE(type, 0); // Type (1 = Header, 2 = Network Data, 3 = End, 4 = Extra Metadata)
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header.writeInt16BE(flags | 1, 2); // Flags (1 = Binary, 2 = User)
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header.writeInt32BE(data.length, 4); // Size
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header.writeIntBE(time, 10, 6); // Time
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var block = Buffer.concat([header, data]);
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if (typeof position == 'number') {
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fs.write(fd, block, 0, block.length, position, function () { func(tag, block.length); });
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} else {
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fs.write(fd, block, 0, block.length, function () { func(tag, block.length); });
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}
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}
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} catch (ex) { console.log(ex); func(tag); }
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}
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function readLastBlock(state, func) {
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var buf = Buffer.alloc(32);
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fs.read(state.recFile, buf, 0, 32, state.recFileSize - 32, function (err, bytesRead, buf) {
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var type = buf.readUInt16BE(0); // Type (1 = Header, 2 = Network Data)
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var flags = buf.readUInt16BE(2); // Flags (1 = Binary, 2 = User)
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var size = buf.readUInt32BE(4); // Size
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var time = buf.readUIntBE(10, 6); // Time
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var magic = buf.toString('utf8', 16, 32);
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if ((type == 3) && (size == 16) && (magic == 'MeshCentralMCNDX')) {
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// Extra metadata present, lets read it.
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extraMetadata = null;
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var buf2 = Buffer.alloc(16);
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fs.read(state.recFile, buf2, 0, 16, time, function (err, bytesRead, buf2) {
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var xtype = buf2.readUInt16BE(0); // Type (1 = Header, 2 = Network Data, 3 = End, 4 = Extra Metadata)
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var xflags = buf2.readUInt16BE(2); // Flags (1 = Binary, 2 = User)
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var xsize = buf2.readUInt32BE(4); // Size
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var xtime = buf.readUIntBE(10, 6); // Time
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var buf3 = Buffer.alloc(xsize);
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fs.read(state.recFile, buf3, 0, xsize, time + 16, function (err, bytesRead, buf3) {
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func(state, true, xtime, JSON.parse(buf3.toString()));
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});
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});
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} else {
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// No extra metadata or fail
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func(state, (type == 3) && (size == 16) && (magic == 'MeshCentralMCREC'), time, null);
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}
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});
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}
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function readNextBlock(state, func) {
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if ((state.recFilePtr + 16) > state.recFileSize) { func(state, null); return; }
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var r = {}, buf = Buffer.alloc(16);
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fs.read(state.recFile, buf, 0, 16, state.recFilePtr, function (err, bytesRead, buf) {
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if (bytesRead != 16) { func(state, null, true); return; } // Error
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try {
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r.type = buf.readUInt16BE(0); // Type (1 = Header, 2 = Network Data, 3 = End, 4 = Extra Metadata)
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r.flags = buf.readUInt16BE(2); // Flags (1 = Binary, 2 = User)
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r.size = buf.readUInt32BE(4); // Size
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r.time = buf.readUIntBE(10, 6); // Time
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r.date = new Date(r.time);
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r.ptr = state.recFilePtr;
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if ((state.recFilePtr + 16 + r.size) > state.recFileSize) { func(state, null, true); return; } // Error
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if (r.size == 0) {
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r.data = null;
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func(state, r);
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} else {
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r.data = Buffer.alloc(r.size);
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fs.read(state.recFile, r.data, 0, r.size, state.recFilePtr + 16, function (err, bytesRead, buf) {
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state.recFilePtr += (16 + r.size);
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func(state, r);
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});
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}
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} catch (ex) { func(state, null, true); return; } // Error
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});
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}
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function isNumber(x) { return (('' + parseInt(x)) === x) || (('' + parseFloat(x)) === x); }
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function format(format) { var args = Array.prototype.slice.call(arguments, 1); return format.replace(/{(\d+)}/g, function (match, number) { return typeof args[number] != 'undefined' ? args[number] : match; }); };
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// Check if a list of modules are present and install any missing ones
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var InstallModuleChildProcess = null;
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var previouslyInstalledModules = {};
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function InstallModules(modules, func) {
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var missingModules = [];
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if (previouslyInstalledModules == null) { previouslyInstalledModules = {}; }
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if (modules.length > 0) {
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for (var i in modules) {
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try {
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var xxmodule = require(modules[i]);
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} catch (e) {
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if (previouslyInstalledModules[modules[i]] !== true) { missingModules.push(modules[i]); }
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}
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}
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if (missingModules.length > 0) { InstallModule(missingModules.shift(), InstallModules, modules, func); } else { func(); }
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}
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}
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// Check if a module is present and install it if missing
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function InstallModule(modulename, func, tag1, tag2) {
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log('Installing ' + modulename + '...');
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var child_process = require('child_process');
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var parentpath = __dirname;
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// Get the working directory
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if ((__dirname.endsWith('/node_modules/meshcentral')) || (__dirname.endsWith('\\node_modules\\meshcentral')) || (__dirname.endsWith('/node_modules/meshcentral/')) || (__dirname.endsWith('\\node_modules\\meshcentral\\'))) { parentpath = require('path').join(__dirname, '../..'); }
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// Looks like we need to keep a global reference to the child process object for this to work correctly.
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InstallModuleChildProcess = child_process.exec('npm install --no-optional --save ' + modulename, { maxBuffer: 512000, timeout: 300000, cwd: parentpath }, function (error, stdout, stderr) {
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InstallModuleChildProcess = null;
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if ((error != null) && (error != '')) {
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log('ERROR: Unable to install required module "' + modulename + '". May not have access to npm, or npm may not have suffisent rights to load the new module. Try "npm install ' + modulename + '" to manualy install this module.\r\n');
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process.exit();
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return;
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}
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previouslyInstalledModules[modulename] = true;
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func(tag1, tag2);
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return;
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});
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}
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function setup() { InstallModules(['image-size'], start); }
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function start() { startEx(process.argv); }
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function startEx(argv) {
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if (argv.length > 2) { indexFile(argv[2]); } else {
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log("MeshCentral Session Recodings Processor");
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log("This tool will index a .mcrec file so that the player can seek thru the file.");
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log("");
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log(" Usage: node mcrec [file]");
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}
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}
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if (directRun) { setup(); }
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// Export table
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module.exports.startEx = startEx;
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module.exports.indexFile = indexFile; |