2989 lines
103 KiB
JavaScript
2989 lines
103 KiB
JavaScript
/*
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* noVNC: HTML5 VNC client
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* Copyright (C) 2020 The noVNC Authors
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* Licensed under MPL 2.0 (see LICENSE.txt)
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*
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* See README.md for usage and integration instructions.
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*
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*/
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import { toUnsigned32bit, toSigned32bit } from './util/int.js';
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import * as Log from './util/logging.js';
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import { encodeUTF8, decodeUTF8 } from './util/strings.js';
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import { dragThreshold } from './util/browser.js';
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import { clientToElement } from './util/element.js';
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import { setCapture } from './util/events.js';
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import EventTargetMixin from './util/eventtarget.js';
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import Display from "./display.js";
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import Inflator from "./inflator.js";
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import Deflator from "./deflator.js";
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import Keyboard from "./input/keyboard.js";
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import GestureHandler from "./input/gesturehandler.js";
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import Cursor from "./util/cursor.js";
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import Websock from "./websock.js";
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import DES from "./des.js";
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import KeyTable from "./input/keysym.js";
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import XtScancode from "./input/xtscancodes.js";
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import { encodings } from "./encodings.js";
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import RawDecoder from "./decoders/raw.js";
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import CopyRectDecoder from "./decoders/copyrect.js";
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import RREDecoder from "./decoders/rre.js";
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import HextileDecoder from "./decoders/hextile.js";
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import TightDecoder from "./decoders/tight.js";
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import TightPNGDecoder from "./decoders/tightpng.js";
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// How many seconds to wait for a disconnect to finish
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const DISCONNECT_TIMEOUT = 3;
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const DEFAULT_BACKGROUND = 'rgb(40, 40, 40)';
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// Minimum wait (ms) between two mouse moves
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const MOUSE_MOVE_DELAY = 17;
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// Wheel thresholds
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const WHEEL_STEP = 50; // Pixels needed for one step
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const WHEEL_LINE_HEIGHT = 19; // Assumed pixels for one line step
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// Gesture thresholds
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const GESTURE_ZOOMSENS = 75;
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const GESTURE_SCRLSENS = 50;
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const DOUBLE_TAP_TIMEOUT = 1000;
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const DOUBLE_TAP_THRESHOLD = 50;
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// Extended clipboard pseudo-encoding formats
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const extendedClipboardFormatText = 1;
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/*eslint-disable no-unused-vars */
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const extendedClipboardFormatRtf = 1 << 1;
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const extendedClipboardFormatHtml = 1 << 2;
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const extendedClipboardFormatDib = 1 << 3;
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const extendedClipboardFormatFiles = 1 << 4;
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/*eslint-enable */
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// Extended clipboard pseudo-encoding actions
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const extendedClipboardActionCaps = 1 << 24;
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const extendedClipboardActionRequest = 1 << 25;
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const extendedClipboardActionPeek = 1 << 26;
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const extendedClipboardActionNotify = 1 << 27;
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const extendedClipboardActionProvide = 1 << 28;
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export default class RFB extends EventTargetMixin {
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constructor(target, urlOrChannel, options) {
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if (!target) {
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throw new Error("Must specify target");
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}
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if (!urlOrChannel) {
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throw new Error("Must specify URL, WebSocket or RTCDataChannel");
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}
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super();
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this._target = target;
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if (typeof urlOrChannel === "string") {
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this._url = urlOrChannel;
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} else {
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this._url = null;
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this._rawChannel = urlOrChannel;
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}
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// Connection details
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options = options || {};
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this._rfbCredentials = options.credentials || {};
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this._shared = 'shared' in options ? !!options.shared : true;
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this._repeaterID = options.repeaterID || '';
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this._wsProtocols = options.wsProtocols || [];
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// Internal state
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this._rfbConnectionState = '';
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this._rfbInitState = '';
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this._rfbAuthScheme = -1;
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this._rfbCleanDisconnect = true;
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// Server capabilities
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this._rfbVersion = 0;
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this._rfbMaxVersion = 3.8;
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this._rfbTightVNC = false;
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this._rfbVeNCryptState = 0;
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this._rfbXvpVer = 0;
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this._fbWidth = 0;
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this._fbHeight = 0;
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this._fbName = "";
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this._capabilities = { power: false };
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this._supportsFence = false;
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this._supportsContinuousUpdates = false;
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this._enabledContinuousUpdates = false;
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this._supportsSetDesktopSize = false;
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this._screenID = 0;
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this._screenFlags = 0;
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this._qemuExtKeyEventSupported = false;
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this._clipboardText = null;
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this._clipboardServerCapabilitiesActions = {};
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this._clipboardServerCapabilitiesFormats = {};
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// Internal objects
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this._sock = null; // Websock object
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this._display = null; // Display object
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this._flushing = false; // Display flushing state
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this._keyboard = null; // Keyboard input handler object
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this._gestures = null; // Gesture input handler object
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this._resizeObserver = null; // Resize observer object
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// Timers
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this._disconnTimer = null; // disconnection timer
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this._resizeTimeout = null; // resize rate limiting
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this._mouseMoveTimer = null;
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// Decoder states
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this._decoders = {};
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this._FBU = {
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rects: 0,
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x: 0,
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y: 0,
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width: 0,
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height: 0,
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encoding: null,
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};
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// Mouse state
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this._mousePos = {};
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this._mouseButtonMask = 0;
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this._mouseLastMoveTime = 0;
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this._viewportDragging = false;
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this._viewportDragPos = {};
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this._viewportHasMoved = false;
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this._accumulatedWheelDeltaX = 0;
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this._accumulatedWheelDeltaY = 0;
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// Gesture state
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this._gestureLastTapTime = null;
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this._gestureFirstDoubleTapEv = null;
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this._gestureLastMagnitudeX = 0;
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this._gestureLastMagnitudeY = 0;
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// Bound event handlers
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this._eventHandlers = {
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focusCanvas: this._focusCanvas.bind(this),
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handleResize: this._handleResize.bind(this),
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handleMouse: this._handleMouse.bind(this),
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handleWheel: this._handleWheel.bind(this),
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handleGesture: this._handleGesture.bind(this),
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};
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// main setup
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Log.Debug(">> RFB.constructor");
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// Create DOM elements
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this._screen = document.createElement('div');
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this._screen.style.display = 'flex';
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this._screen.style.width = '100%';
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this._screen.style.height = '100%';
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this._screen.style.overflow = 'auto';
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this._screen.style.background = DEFAULT_BACKGROUND;
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this._canvas = document.createElement('canvas');
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this._canvas.style.margin = 'auto';
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// Some browsers add an outline on focus
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this._canvas.style.outline = 'none';
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this._canvas.width = 0;
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this._canvas.height = 0;
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this._canvas.tabIndex = -1;
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this._screen.appendChild(this._canvas);
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// Cursor
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this._cursor = new Cursor();
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// XXX: TightVNC 2.8.11 sends no cursor at all until Windows changes
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// it. Result: no cursor at all until a window border or an edit field
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// is hit blindly. But there are also VNC servers that draw the cursor
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// in the framebuffer and don't send the empty local cursor. There is
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// no way to satisfy both sides.
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//
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// The spec is unclear on this "initial cursor" issue. Many other
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// viewers (TigerVNC, RealVNC, Remmina) display an arrow as the
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// initial cursor instead.
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this._cursorImage = RFB.cursors.none;
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// populate decoder array with objects
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this._decoders[encodings.encodingRaw] = new RawDecoder();
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this._decoders[encodings.encodingCopyRect] = new CopyRectDecoder();
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this._decoders[encodings.encodingRRE] = new RREDecoder();
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this._decoders[encodings.encodingHextile] = new HextileDecoder();
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this._decoders[encodings.encodingTight] = new TightDecoder();
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this._decoders[encodings.encodingTightPNG] = new TightPNGDecoder();
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// NB: nothing that needs explicit teardown should be done
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// before this point, since this can throw an exception
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try {
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this._display = new Display(this._canvas);
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} catch (exc) {
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Log.Error("Display exception: " + exc);
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throw exc;
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}
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this._display.onflush = this._onFlush.bind(this);
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this._keyboard = new Keyboard(this._canvas);
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this._keyboard.onkeyevent = this._handleKeyEvent.bind(this);
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this._gestures = new GestureHandler();
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this._sock = new Websock();
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this._sock.on('open', this._socketOpen.bind(this));
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this._sock.on('close', this._socketClose.bind(this));
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this._sock.on('message', this._handleMessage.bind(this));
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this._sock.on('error', this._socketError.bind(this));
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this._resizeObserver = new ResizeObserver(this._eventHandlers.handleResize);
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// All prepared, kick off the connection
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this._updateConnectionState('connecting');
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Log.Debug("<< RFB.constructor");
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// ===== PROPERTIES =====
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this.dragViewport = false;
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this.focusOnClick = true;
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this._viewOnly = false;
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this._clipViewport = false;
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this._scaleViewport = false;
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this._resizeSession = false;
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this._showDotCursor = false;
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if (options.showDotCursor !== undefined) {
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Log.Warn("Specifying showDotCursor as a RFB constructor argument is deprecated");
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this._showDotCursor = options.showDotCursor;
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}
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this._qualityLevel = 6;
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this._compressionLevel = 2;
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}
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// ===== PROPERTIES =====
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get viewOnly() { return this._viewOnly; }
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set viewOnly(viewOnly) {
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this._viewOnly = viewOnly;
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if (this._rfbConnectionState === "connecting" ||
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this._rfbConnectionState === "connected") {
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if (viewOnly) {
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this._keyboard.ungrab();
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} else {
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this._keyboard.grab();
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}
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}
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}
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get capabilities() { return this._capabilities; }
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get touchButton() { return 0; }
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set touchButton(button) { Log.Warn("Using old API!"); }
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get clipViewport() { return this._clipViewport; }
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set clipViewport(viewport) {
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this._clipViewport = viewport;
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this._updateClip();
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}
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get scaleViewport() { return this._scaleViewport; }
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set scaleViewport(scale) {
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this._scaleViewport = scale;
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// Scaling trumps clipping, so we may need to adjust
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// clipping when enabling or disabling scaling
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if (scale && this._clipViewport) {
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this._updateClip();
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}
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this._updateScale();
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if (!scale && this._clipViewport) {
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this._updateClip();
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}
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}
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get resizeSession() { return this._resizeSession; }
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set resizeSession(resize) {
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this._resizeSession = resize;
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if (resize) {
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this._requestRemoteResize();
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}
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}
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get showDotCursor() { return this._showDotCursor; }
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set showDotCursor(show) {
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this._showDotCursor = show;
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this._refreshCursor();
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}
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get background() { return this._screen.style.background; }
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set background(cssValue) { this._screen.style.background = cssValue; }
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get qualityLevel() {
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return this._qualityLevel;
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}
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set qualityLevel(qualityLevel) {
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if (!Number.isInteger(qualityLevel) || qualityLevel < 0 || qualityLevel > 9) {
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Log.Error("qualityLevel must be an integer between 0 and 9");
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return;
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}
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if (this._qualityLevel === qualityLevel) {
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return;
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}
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this._qualityLevel = qualityLevel;
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if (this._rfbConnectionState === 'connected') {
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this._sendEncodings();
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}
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}
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get compressionLevel() {
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return this._compressionLevel;
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}
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set compressionLevel(compressionLevel) {
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if (!Number.isInteger(compressionLevel) || compressionLevel < 0 || compressionLevel > 9) {
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Log.Error("compressionLevel must be an integer between 0 and 9");
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return;
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}
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if (this._compressionLevel === compressionLevel) {
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return;
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}
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this._compressionLevel = compressionLevel;
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if (this._rfbConnectionState === 'connected') {
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this._sendEncodings();
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}
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}
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// ===== PUBLIC METHODS =====
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disconnect() {
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this._updateConnectionState('disconnecting');
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this._sock.off('error');
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this._sock.off('message');
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this._sock.off('open');
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}
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sendCredentials(creds) {
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this._rfbCredentials = creds;
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setTimeout(this._initMsg.bind(this), 0);
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}
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sendCtrlAltDel() {
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if (this._rfbConnectionState !== 'connected' || this._viewOnly) { return; }
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Log.Info("Sending Ctrl-Alt-Del");
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this.sendKey(KeyTable.XK_Control_L, "ControlLeft", true);
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this.sendKey(KeyTable.XK_Alt_L, "AltLeft", true);
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this.sendKey(KeyTable.XK_Delete, "Delete", true);
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this.sendKey(KeyTable.XK_Delete, "Delete", false);
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this.sendKey(KeyTable.XK_Alt_L, "AltLeft", false);
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this.sendKey(KeyTable.XK_Control_L, "ControlLeft", false);
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}
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machineShutdown() {
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this._xvpOp(1, 2);
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}
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machineReboot() {
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this._xvpOp(1, 3);
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}
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machineReset() {
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this._xvpOp(1, 4);
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}
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// Send a key press. If 'down' is not specified then send a down key
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// followed by an up key.
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sendKey(keysym, code, down) {
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if (this._rfbConnectionState !== 'connected' || this._viewOnly) { return; }
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if (down === undefined) {
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this.sendKey(keysym, code, true);
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this.sendKey(keysym, code, false);
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return;
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}
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const scancode = XtScancode[code];
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if (this._qemuExtKeyEventSupported && scancode) {
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// 0 is NoSymbol
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keysym = keysym || 0;
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Log.Info("Sending key (" + (down ? "down" : "up") + "): keysym " + keysym + ", scancode " + scancode);
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RFB.messages.QEMUExtendedKeyEvent(this._sock, keysym, down, scancode);
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} else {
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if (!keysym) {
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return;
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}
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Log.Info("Sending keysym (" + (down ? "down" : "up") + "): " + keysym);
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RFB.messages.keyEvent(this._sock, keysym, down ? 1 : 0);
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}
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}
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focus() {
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this._canvas.focus();
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}
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blur() {
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this._canvas.blur();
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}
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clipboardPasteFrom(text) {
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if (this._rfbConnectionState !== 'connected' || this._viewOnly) { return; }
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if (this._clipboardServerCapabilitiesFormats[extendedClipboardFormatText] &&
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this._clipboardServerCapabilitiesActions[extendedClipboardActionNotify]) {
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this._clipboardText = text;
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RFB.messages.extendedClipboardNotify(this._sock, [extendedClipboardFormatText]);
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} else {
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let data = new Uint8Array(text.length);
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for (let i = 0; i < text.length; i++) {
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// FIXME: text can have values outside of Latin1/Uint8
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data[i] = text.charCodeAt(i);
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}
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RFB.messages.clientCutText(this._sock, data);
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}
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}
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// ===== PRIVATE METHODS =====
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_connect() {
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Log.Debug(">> RFB.connect");
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if (this._url) {
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Log.Info(`connecting to ${this._url}`);
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this._sock.open(this._url, this._wsProtocols);
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} else {
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Log.Info(`attaching ${this._rawChannel} to Websock`);
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this._sock.attach(this._rawChannel);
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if (this._sock.readyState === 'closed') {
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throw Error("Cannot use already closed WebSocket/RTCDataChannel");
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}
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if (this._sock.readyState === 'open') {
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// FIXME: _socketOpen() can in theory call _fail(), which
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// isn't allowed this early, but I'm not sure that can
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// happen without a bug messing up our state variables
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this._socketOpen();
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}
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}
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// Make our elements part of the page
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this._target.appendChild(this._screen);
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this._gestures.attach(this._canvas);
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this._cursor.attach(this._canvas);
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this._refreshCursor();
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// Monitor size changes of the screen element
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this._resizeObserver.observe(this._screen);
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// Always grab focus on some kind of click event
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this._canvas.addEventListener("mousedown", this._eventHandlers.focusCanvas);
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this._canvas.addEventListener("touchstart", this._eventHandlers.focusCanvas);
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// Mouse events
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this._canvas.addEventListener('mousedown', this._eventHandlers.handleMouse);
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this._canvas.addEventListener('mouseup', this._eventHandlers.handleMouse);
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this._canvas.addEventListener('mousemove', this._eventHandlers.handleMouse);
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// Prevent middle-click pasting (see handler for why we bind to document)
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this._canvas.addEventListener('click', this._eventHandlers.handleMouse);
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// preventDefault() on mousedown doesn't stop this event for some
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// reason so we have to explicitly block it
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this._canvas.addEventListener('contextmenu', this._eventHandlers.handleMouse);
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// Wheel events
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this._canvas.addEventListener("wheel", this._eventHandlers.handleWheel);
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// Gesture events
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this._canvas.addEventListener("gesturestart", this._eventHandlers.handleGesture);
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this._canvas.addEventListener("gesturemove", this._eventHandlers.handleGesture);
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this._canvas.addEventListener("gestureend", this._eventHandlers.handleGesture);
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Log.Debug("<< RFB.connect");
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}
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_disconnect() {
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Log.Debug(">> RFB.disconnect");
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this._cursor.detach();
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this._canvas.removeEventListener("gesturestart", this._eventHandlers.handleGesture);
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this._canvas.removeEventListener("gesturemove", this._eventHandlers.handleGesture);
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this._canvas.removeEventListener("gestureend", this._eventHandlers.handleGesture);
|
|
this._canvas.removeEventListener("wheel", this._eventHandlers.handleWheel);
|
|
this._canvas.removeEventListener('mousedown', this._eventHandlers.handleMouse);
|
|
this._canvas.removeEventListener('mouseup', this._eventHandlers.handleMouse);
|
|
this._canvas.removeEventListener('mousemove', this._eventHandlers.handleMouse);
|
|
this._canvas.removeEventListener('click', this._eventHandlers.handleMouse);
|
|
this._canvas.removeEventListener('contextmenu', this._eventHandlers.handleMouse);
|
|
this._canvas.removeEventListener("mousedown", this._eventHandlers.focusCanvas);
|
|
this._canvas.removeEventListener("touchstart", this._eventHandlers.focusCanvas);
|
|
this._resizeObserver.disconnect();
|
|
this._keyboard.ungrab();
|
|
this._gestures.detach();
|
|
this._sock.close();
|
|
try {
|
|
this._target.removeChild(this._screen);
|
|
} catch (e) {
|
|
if (e.name === 'NotFoundError') {
|
|
// Some cases where the initial connection fails
|
|
// can disconnect before the _screen is created
|
|
} else {
|
|
throw e;
|
|
}
|
|
}
|
|
clearTimeout(this._resizeTimeout);
|
|
clearTimeout(this._mouseMoveTimer);
|
|
Log.Debug("<< RFB.disconnect");
|
|
}
|
|
|
|
_socketOpen() {
|
|
if ((this._rfbConnectionState === 'connecting') &&
|
|
(this._rfbInitState === '')) {
|
|
this._rfbInitState = 'ProtocolVersion';
|
|
Log.Debug("Starting VNC handshake");
|
|
} else {
|
|
this._fail("Unexpected server connection while " +
|
|
this._rfbConnectionState);
|
|
}
|
|
}
|
|
|
|
_socketClose(e) {
|
|
Log.Debug("WebSocket on-close event");
|
|
let msg = "";
|
|
if (e.code) {
|
|
msg = "(code: " + e.code;
|
|
if (e.reason) {
|
|
msg += ", reason: " + e.reason;
|
|
}
|
|
msg += ")";
|
|
}
|
|
switch (this._rfbConnectionState) {
|
|
case 'connecting':
|
|
this._fail("Connection closed " + msg);
|
|
break;
|
|
case 'connected':
|
|
// Handle disconnects that were initiated server-side
|
|
this._updateConnectionState('disconnecting');
|
|
this._updateConnectionState('disconnected');
|
|
break;
|
|
case 'disconnecting':
|
|
// Normal disconnection path
|
|
this._updateConnectionState('disconnected');
|
|
break;
|
|
case 'disconnected':
|
|
this._fail("Unexpected server disconnect " +
|
|
"when already disconnected " + msg);
|
|
break;
|
|
default:
|
|
this._fail("Unexpected server disconnect before connecting " +
|
|
msg);
|
|
break;
|
|
}
|
|
this._sock.off('close');
|
|
// Delete reference to raw channel to allow cleanup.
|
|
this._rawChannel = null;
|
|
}
|
|
|
|
_socketError(e) {
|
|
Log.Warn("WebSocket on-error event");
|
|
}
|
|
|
|
_focusCanvas(event) {
|
|
if (!this.focusOnClick) {
|
|
return;
|
|
}
|
|
|
|
this.focus();
|
|
}
|
|
|
|
_setDesktopName(name) {
|
|
this._fbName = name;
|
|
this.dispatchEvent(new CustomEvent(
|
|
"desktopname",
|
|
{ detail: { name: this._fbName } }));
|
|
}
|
|
|
|
_handleResize() {
|
|
// If the window resized then our screen element might have
|
|
// as well. Update the viewport dimensions.
|
|
window.requestAnimationFrame(() => {
|
|
this._updateClip();
|
|
this._updateScale();
|
|
});
|
|
|
|
if (this._resizeSession) {
|
|
// Request changing the resolution of the remote display to
|
|
// the size of the local browser viewport.
|
|
|
|
// In order to not send multiple requests before the browser-resize
|
|
// is finished we wait 0.5 seconds before sending the request.
|
|
clearTimeout(this._resizeTimeout);
|
|
this._resizeTimeout = setTimeout(this._requestRemoteResize.bind(this), 500);
|
|
}
|
|
}
|
|
|
|
// Update state of clipping in Display object, and make sure the
|
|
// configured viewport matches the current screen size
|
|
_updateClip() {
|
|
const curClip = this._display.clipViewport;
|
|
let newClip = this._clipViewport;
|
|
|
|
if (this._scaleViewport) {
|
|
// Disable viewport clipping if we are scaling
|
|
newClip = false;
|
|
}
|
|
|
|
if (curClip !== newClip) {
|
|
this._display.clipViewport = newClip;
|
|
}
|
|
|
|
if (newClip) {
|
|
// When clipping is enabled, the screen is limited to
|
|
// the size of the container.
|
|
const size = this._screenSize();
|
|
this._display.viewportChangeSize(size.w, size.h);
|
|
this._fixScrollbars();
|
|
}
|
|
}
|
|
|
|
_updateScale() {
|
|
if (!this._scaleViewport) {
|
|
this._display.scale = 1.0;
|
|
} else {
|
|
const size = this._screenSize();
|
|
this._display.autoscale(size.w, size.h);
|
|
}
|
|
this._fixScrollbars();
|
|
}
|
|
|
|
// Requests a change of remote desktop size. This message is an extension
|
|
// and may only be sent if we have received an ExtendedDesktopSize message
|
|
_requestRemoteResize() {
|
|
clearTimeout(this._resizeTimeout);
|
|
this._resizeTimeout = null;
|
|
|
|
if (!this._resizeSession || this._viewOnly ||
|
|
!this._supportsSetDesktopSize) {
|
|
return;
|
|
}
|
|
|
|
const size = this._screenSize();
|
|
RFB.messages.setDesktopSize(this._sock,
|
|
Math.floor(size.w), Math.floor(size.h),
|
|
this._screenID, this._screenFlags);
|
|
|
|
Log.Debug('Requested new desktop size: ' +
|
|
size.w + 'x' + size.h);
|
|
}
|
|
|
|
// Gets the the size of the available screen
|
|
_screenSize() {
|
|
let r = this._screen.getBoundingClientRect();
|
|
return { w: r.width, h: r.height };
|
|
}
|
|
|
|
_fixScrollbars() {
|
|
// This is a hack because Chrome screws up the calculation
|
|
// for when scrollbars are needed. So to fix it we temporarily
|
|
// toggle them off and on.
|
|
const orig = this._screen.style.overflow;
|
|
this._screen.style.overflow = 'hidden';
|
|
// Force Chrome to recalculate the layout by asking for
|
|
// an element's dimensions
|
|
this._screen.getBoundingClientRect();
|
|
this._screen.style.overflow = orig;
|
|
}
|
|
|
|
/*
|
|
* Connection states:
|
|
* connecting
|
|
* connected
|
|
* disconnecting
|
|
* disconnected - permanent state
|
|
*/
|
|
_updateConnectionState(state) {
|
|
const oldstate = this._rfbConnectionState;
|
|
|
|
if (state === oldstate) {
|
|
Log.Debug("Already in state '" + state + "', ignoring");
|
|
return;
|
|
}
|
|
|
|
// The 'disconnected' state is permanent for each RFB object
|
|
if (oldstate === 'disconnected') {
|
|
Log.Error("Tried changing state of a disconnected RFB object");
|
|
return;
|
|
}
|
|
|
|
// Ensure proper transitions before doing anything
|
|
switch (state) {
|
|
case 'connected':
|
|
if (oldstate !== 'connecting') {
|
|
Log.Error("Bad transition to connected state, " +
|
|
"previous connection state: " + oldstate);
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case 'disconnected':
|
|
if (oldstate !== 'disconnecting') {
|
|
Log.Error("Bad transition to disconnected state, " +
|
|
"previous connection state: " + oldstate);
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case 'connecting':
|
|
if (oldstate !== '') {
|
|
Log.Error("Bad transition to connecting state, " +
|
|
"previous connection state: " + oldstate);
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case 'disconnecting':
|
|
if (oldstate !== 'connected' && oldstate !== 'connecting') {
|
|
Log.Error("Bad transition to disconnecting state, " +
|
|
"previous connection state: " + oldstate);
|
|
return;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
Log.Error("Unknown connection state: " + state);
|
|
return;
|
|
}
|
|
|
|
// State change actions
|
|
|
|
this._rfbConnectionState = state;
|
|
|
|
Log.Debug("New state '" + state + "', was '" + oldstate + "'.");
|
|
|
|
if (this._disconnTimer && state !== 'disconnecting') {
|
|
Log.Debug("Clearing disconnect timer");
|
|
clearTimeout(this._disconnTimer);
|
|
this._disconnTimer = null;
|
|
|
|
// make sure we don't get a double event
|
|
this._sock.off('close');
|
|
}
|
|
|
|
switch (state) {
|
|
case 'connecting':
|
|
this._connect();
|
|
break;
|
|
|
|
case 'connected':
|
|
this.dispatchEvent(new CustomEvent("connect", { detail: {} }));
|
|
break;
|
|
|
|
case 'disconnecting':
|
|
this._disconnect();
|
|
|
|
this._disconnTimer = setTimeout(() => {
|
|
Log.Error("Disconnection timed out.");
|
|
this._updateConnectionState('disconnected');
|
|
}, DISCONNECT_TIMEOUT * 1000);
|
|
break;
|
|
|
|
case 'disconnected':
|
|
this.dispatchEvent(new CustomEvent(
|
|
"disconnect", { detail:
|
|
{ clean: this._rfbCleanDisconnect } }));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Print errors and disconnect
|
|
*
|
|
* The parameter 'details' is used for information that
|
|
* should be logged but not sent to the user interface.
|
|
*/
|
|
_fail(details) {
|
|
switch (this._rfbConnectionState) {
|
|
case 'disconnecting':
|
|
Log.Error("Failed when disconnecting: " + details);
|
|
break;
|
|
case 'connected':
|
|
Log.Error("Failed while connected: " + details);
|
|
break;
|
|
case 'connecting':
|
|
Log.Error("Failed when connecting: " + details);
|
|
break;
|
|
default:
|
|
Log.Error("RFB failure: " + details);
|
|
break;
|
|
}
|
|
this._rfbCleanDisconnect = false; //This is sent to the UI
|
|
|
|
// Transition to disconnected without waiting for socket to close
|
|
this._updateConnectionState('disconnecting');
|
|
this._updateConnectionState('disconnected');
|
|
|
|
return false;
|
|
}
|
|
|
|
_setCapability(cap, val) {
|
|
this._capabilities[cap] = val;
|
|
this.dispatchEvent(new CustomEvent("capabilities",
|
|
{ detail: { capabilities: this._capabilities } }));
|
|
}
|
|
|
|
_handleMessage() {
|
|
if (this._sock.rQlen === 0) {
|
|
Log.Warn("handleMessage called on an empty receive queue");
|
|
return;
|
|
}
|
|
|
|
switch (this._rfbConnectionState) {
|
|
case 'disconnected':
|
|
Log.Error("Got data while disconnected");
|
|
break;
|
|
case 'connected':
|
|
while (true) {
|
|
if (this._flushing) {
|
|
break;
|
|
}
|
|
if (!this._normalMsg()) {
|
|
break;
|
|
}
|
|
if (this._sock.rQlen === 0) {
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
this._initMsg();
|
|
break;
|
|
}
|
|
}
|
|
|
|
_handleKeyEvent(keysym, code, down) {
|
|
this.sendKey(keysym, code, down);
|
|
}
|
|
|
|
_handleMouse(ev) {
|
|
/*
|
|
* We don't check connection status or viewOnly here as the
|
|
* mouse events might be used to control the viewport
|
|
*/
|
|
|
|
if (ev.type === 'click') {
|
|
/*
|
|
* Note: This is only needed for the 'click' event as it fails
|
|
* to fire properly for the target element so we have
|
|
* to listen on the document element instead.
|
|
*/
|
|
if (ev.target !== this._canvas) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
// FIXME: if we're in view-only and not dragging,
|
|
// should we stop events?
|
|
ev.stopPropagation();
|
|
ev.preventDefault();
|
|
|
|
if ((ev.type === 'click') || (ev.type === 'contextmenu')) {
|
|
return;
|
|
}
|
|
|
|
let pos = clientToElement(ev.clientX, ev.clientY,
|
|
this._canvas);
|
|
|
|
switch (ev.type) {
|
|
case 'mousedown':
|
|
setCapture(this._canvas);
|
|
this._handleMouseButton(pos.x, pos.y,
|
|
true, 1 << ev.button);
|
|
break;
|
|
case 'mouseup':
|
|
this._handleMouseButton(pos.x, pos.y,
|
|
false, 1 << ev.button);
|
|
break;
|
|
case 'mousemove':
|
|
this._handleMouseMove(pos.x, pos.y);
|
|
break;
|
|
}
|
|
}
|
|
|
|
_handleMouseButton(x, y, down, bmask) {
|
|
if (this.dragViewport) {
|
|
if (down && !this._viewportDragging) {
|
|
this._viewportDragging = true;
|
|
this._viewportDragPos = {'x': x, 'y': y};
|
|
this._viewportHasMoved = false;
|
|
|
|
// Skip sending mouse events
|
|
return;
|
|
} else {
|
|
this._viewportDragging = false;
|
|
|
|
// If we actually performed a drag then we are done
|
|
// here and should not send any mouse events
|
|
if (this._viewportHasMoved) {
|
|
return;
|
|
}
|
|
|
|
// Otherwise we treat this as a mouse click event.
|
|
// Send the button down event here, as the button up
|
|
// event is sent at the end of this function.
|
|
this._sendMouse(x, y, bmask);
|
|
}
|
|
}
|
|
|
|
// Flush waiting move event first
|
|
if (this._mouseMoveTimer !== null) {
|
|
clearTimeout(this._mouseMoveTimer);
|
|
this._mouseMoveTimer = null;
|
|
this._sendMouse(x, y, this._mouseButtonMask);
|
|
}
|
|
|
|
if (down) {
|
|
this._mouseButtonMask |= bmask;
|
|
} else {
|
|
this._mouseButtonMask &= ~bmask;
|
|
}
|
|
|
|
this._sendMouse(x, y, this._mouseButtonMask);
|
|
}
|
|
|
|
_handleMouseMove(x, y) {
|
|
if (this._viewportDragging) {
|
|
const deltaX = this._viewportDragPos.x - x;
|
|
const deltaY = this._viewportDragPos.y - y;
|
|
|
|
if (this._viewportHasMoved || (Math.abs(deltaX) > dragThreshold ||
|
|
Math.abs(deltaY) > dragThreshold)) {
|
|
this._viewportHasMoved = true;
|
|
|
|
this._viewportDragPos = {'x': x, 'y': y};
|
|
this._display.viewportChangePos(deltaX, deltaY);
|
|
}
|
|
|
|
// Skip sending mouse events
|
|
return;
|
|
}
|
|
|
|
this._mousePos = { 'x': x, 'y': y };
|
|
|
|
// Limit many mouse move events to one every MOUSE_MOVE_DELAY ms
|
|
if (this._mouseMoveTimer == null) {
|
|
|
|
const timeSinceLastMove = Date.now() - this._mouseLastMoveTime;
|
|
if (timeSinceLastMove > MOUSE_MOVE_DELAY) {
|
|
this._sendMouse(x, y, this._mouseButtonMask);
|
|
this._mouseLastMoveTime = Date.now();
|
|
} else {
|
|
// Too soon since the latest move, wait the remaining time
|
|
this._mouseMoveTimer = setTimeout(() => {
|
|
this._handleDelayedMouseMove();
|
|
}, MOUSE_MOVE_DELAY - timeSinceLastMove);
|
|
}
|
|
}
|
|
}
|
|
|
|
_handleDelayedMouseMove() {
|
|
this._mouseMoveTimer = null;
|
|
this._sendMouse(this._mousePos.x, this._mousePos.y,
|
|
this._mouseButtonMask);
|
|
this._mouseLastMoveTime = Date.now();
|
|
}
|
|
|
|
_sendMouse(x, y, mask) {
|
|
if (this._rfbConnectionState !== 'connected') { return; }
|
|
if (this._viewOnly) { return; } // View only, skip mouse events
|
|
|
|
RFB.messages.pointerEvent(this._sock, this._display.absX(x),
|
|
this._display.absY(y), mask);
|
|
}
|
|
|
|
_handleWheel(ev) {
|
|
if (this._rfbConnectionState !== 'connected') { return; }
|
|
if (this._viewOnly) { return; } // View only, skip mouse events
|
|
|
|
ev.stopPropagation();
|
|
ev.preventDefault();
|
|
|
|
let pos = clientToElement(ev.clientX, ev.clientY,
|
|
this._canvas);
|
|
|
|
let dX = ev.deltaX;
|
|
let dY = ev.deltaY;
|
|
|
|
// Pixel units unless it's non-zero.
|
|
// Note that if deltamode is line or page won't matter since we aren't
|
|
// sending the mouse wheel delta to the server anyway.
|
|
// The difference between pixel and line can be important however since
|
|
// we have a threshold that can be smaller than the line height.
|
|
if (ev.deltaMode !== 0) {
|
|
dX *= WHEEL_LINE_HEIGHT;
|
|
dY *= WHEEL_LINE_HEIGHT;
|
|
}
|
|
|
|
// Mouse wheel events are sent in steps over VNC. This means that the VNC
|
|
// protocol can't handle a wheel event with specific distance or speed.
|
|
// Therefor, if we get a lot of small mouse wheel events we combine them.
|
|
this._accumulatedWheelDeltaX += dX;
|
|
this._accumulatedWheelDeltaY += dY;
|
|
|
|
// Generate a mouse wheel step event when the accumulated delta
|
|
// for one of the axes is large enough.
|
|
if (Math.abs(this._accumulatedWheelDeltaX) >= WHEEL_STEP) {
|
|
if (this._accumulatedWheelDeltaX < 0) {
|
|
this._handleMouseButton(pos.x, pos.y, true, 1 << 5);
|
|
this._handleMouseButton(pos.x, pos.y, false, 1 << 5);
|
|
} else if (this._accumulatedWheelDeltaX > 0) {
|
|
this._handleMouseButton(pos.x, pos.y, true, 1 << 6);
|
|
this._handleMouseButton(pos.x, pos.y, false, 1 << 6);
|
|
}
|
|
|
|
this._accumulatedWheelDeltaX = 0;
|
|
}
|
|
if (Math.abs(this._accumulatedWheelDeltaY) >= WHEEL_STEP) {
|
|
if (this._accumulatedWheelDeltaY < 0) {
|
|
this._handleMouseButton(pos.x, pos.y, true, 1 << 3);
|
|
this._handleMouseButton(pos.x, pos.y, false, 1 << 3);
|
|
} else if (this._accumulatedWheelDeltaY > 0) {
|
|
this._handleMouseButton(pos.x, pos.y, true, 1 << 4);
|
|
this._handleMouseButton(pos.x, pos.y, false, 1 << 4);
|
|
}
|
|
|
|
this._accumulatedWheelDeltaY = 0;
|
|
}
|
|
}
|
|
|
|
_fakeMouseMove(ev, elementX, elementY) {
|
|
this._handleMouseMove(elementX, elementY);
|
|
this._cursor.move(ev.detail.clientX, ev.detail.clientY);
|
|
}
|
|
|
|
_handleTapEvent(ev, bmask) {
|
|
let pos = clientToElement(ev.detail.clientX, ev.detail.clientY,
|
|
this._canvas);
|
|
|
|
// If the user quickly taps multiple times we assume they meant to
|
|
// hit the same spot, so slightly adjust coordinates
|
|
|
|
if ((this._gestureLastTapTime !== null) &&
|
|
((Date.now() - this._gestureLastTapTime) < DOUBLE_TAP_TIMEOUT) &&
|
|
(this._gestureFirstDoubleTapEv.detail.type === ev.detail.type)) {
|
|
let dx = this._gestureFirstDoubleTapEv.detail.clientX - ev.detail.clientX;
|
|
let dy = this._gestureFirstDoubleTapEv.detail.clientY - ev.detail.clientY;
|
|
let distance = Math.hypot(dx, dy);
|
|
|
|
if (distance < DOUBLE_TAP_THRESHOLD) {
|
|
pos = clientToElement(this._gestureFirstDoubleTapEv.detail.clientX,
|
|
this._gestureFirstDoubleTapEv.detail.clientY,
|
|
this._canvas);
|
|
} else {
|
|
this._gestureFirstDoubleTapEv = ev;
|
|
}
|
|
} else {
|
|
this._gestureFirstDoubleTapEv = ev;
|
|
}
|
|
this._gestureLastTapTime = Date.now();
|
|
|
|
this._fakeMouseMove(this._gestureFirstDoubleTapEv, pos.x, pos.y);
|
|
this._handleMouseButton(pos.x, pos.y, true, bmask);
|
|
this._handleMouseButton(pos.x, pos.y, false, bmask);
|
|
}
|
|
|
|
_handleGesture(ev) {
|
|
let magnitude;
|
|
|
|
let pos = clientToElement(ev.detail.clientX, ev.detail.clientY,
|
|
this._canvas);
|
|
switch (ev.type) {
|
|
case 'gesturestart':
|
|
switch (ev.detail.type) {
|
|
case 'onetap':
|
|
this._handleTapEvent(ev, 0x1);
|
|
break;
|
|
case 'twotap':
|
|
this._handleTapEvent(ev, 0x4);
|
|
break;
|
|
case 'threetap':
|
|
this._handleTapEvent(ev, 0x2);
|
|
break;
|
|
case 'drag':
|
|
this._fakeMouseMove(ev, pos.x, pos.y);
|
|
this._handleMouseButton(pos.x, pos.y, true, 0x1);
|
|
break;
|
|
case 'longpress':
|
|
this._fakeMouseMove(ev, pos.x, pos.y);
|
|
this._handleMouseButton(pos.x, pos.y, true, 0x4);
|
|
break;
|
|
|
|
case 'twodrag':
|
|
this._gestureLastMagnitudeX = ev.detail.magnitudeX;
|
|
this._gestureLastMagnitudeY = ev.detail.magnitudeY;
|
|
this._fakeMouseMove(ev, pos.x, pos.y);
|
|
break;
|
|
case 'pinch':
|
|
this._gestureLastMagnitudeX = Math.hypot(ev.detail.magnitudeX,
|
|
ev.detail.magnitudeY);
|
|
this._fakeMouseMove(ev, pos.x, pos.y);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 'gesturemove':
|
|
switch (ev.detail.type) {
|
|
case 'onetap':
|
|
case 'twotap':
|
|
case 'threetap':
|
|
break;
|
|
case 'drag':
|
|
case 'longpress':
|
|
this._fakeMouseMove(ev, pos.x, pos.y);
|
|
break;
|
|
case 'twodrag':
|
|
// Always scroll in the same position.
|
|
// We don't know if the mouse was moved so we need to move it
|
|
// every update.
|
|
this._fakeMouseMove(ev, pos.x, pos.y);
|
|
while ((ev.detail.magnitudeY - this._gestureLastMagnitudeY) > GESTURE_SCRLSENS) {
|
|
this._handleMouseButton(pos.x, pos.y, true, 0x8);
|
|
this._handleMouseButton(pos.x, pos.y, false, 0x8);
|
|
this._gestureLastMagnitudeY += GESTURE_SCRLSENS;
|
|
}
|
|
while ((ev.detail.magnitudeY - this._gestureLastMagnitudeY) < -GESTURE_SCRLSENS) {
|
|
this._handleMouseButton(pos.x, pos.y, true, 0x10);
|
|
this._handleMouseButton(pos.x, pos.y, false, 0x10);
|
|
this._gestureLastMagnitudeY -= GESTURE_SCRLSENS;
|
|
}
|
|
while ((ev.detail.magnitudeX - this._gestureLastMagnitudeX) > GESTURE_SCRLSENS) {
|
|
this._handleMouseButton(pos.x, pos.y, true, 0x20);
|
|
this._handleMouseButton(pos.x, pos.y, false, 0x20);
|
|
this._gestureLastMagnitudeX += GESTURE_SCRLSENS;
|
|
}
|
|
while ((ev.detail.magnitudeX - this._gestureLastMagnitudeX) < -GESTURE_SCRLSENS) {
|
|
this._handleMouseButton(pos.x, pos.y, true, 0x40);
|
|
this._handleMouseButton(pos.x, pos.y, false, 0x40);
|
|
this._gestureLastMagnitudeX -= GESTURE_SCRLSENS;
|
|
}
|
|
break;
|
|
case 'pinch':
|
|
// Always scroll in the same position.
|
|
// We don't know if the mouse was moved so we need to move it
|
|
// every update.
|
|
this._fakeMouseMove(ev, pos.x, pos.y);
|
|
magnitude = Math.hypot(ev.detail.magnitudeX, ev.detail.magnitudeY);
|
|
if (Math.abs(magnitude - this._gestureLastMagnitudeX) > GESTURE_ZOOMSENS) {
|
|
this._handleKeyEvent(KeyTable.XK_Control_L, "ControlLeft", true);
|
|
while ((magnitude - this._gestureLastMagnitudeX) > GESTURE_ZOOMSENS) {
|
|
this._handleMouseButton(pos.x, pos.y, true, 0x8);
|
|
this._handleMouseButton(pos.x, pos.y, false, 0x8);
|
|
this._gestureLastMagnitudeX += GESTURE_ZOOMSENS;
|
|
}
|
|
while ((magnitude - this._gestureLastMagnitudeX) < -GESTURE_ZOOMSENS) {
|
|
this._handleMouseButton(pos.x, pos.y, true, 0x10);
|
|
this._handleMouseButton(pos.x, pos.y, false, 0x10);
|
|
this._gestureLastMagnitudeX -= GESTURE_ZOOMSENS;
|
|
}
|
|
}
|
|
this._handleKeyEvent(KeyTable.XK_Control_L, "ControlLeft", false);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 'gestureend':
|
|
switch (ev.detail.type) {
|
|
case 'onetap':
|
|
case 'twotap':
|
|
case 'threetap':
|
|
case 'pinch':
|
|
case 'twodrag':
|
|
break;
|
|
case 'drag':
|
|
this._fakeMouseMove(ev, pos.x, pos.y);
|
|
this._handleMouseButton(pos.x, pos.y, false, 0x1);
|
|
break;
|
|
case 'longpress':
|
|
this._fakeMouseMove(ev, pos.x, pos.y);
|
|
this._handleMouseButton(pos.x, pos.y, false, 0x4);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Message Handlers
|
|
|
|
_negotiateProtocolVersion() {
|
|
if (this._sock.rQwait("version", 12)) {
|
|
return false;
|
|
}
|
|
|
|
const sversion = this._sock.rQshiftStr(12).substr(4, 7);
|
|
Log.Info("Server ProtocolVersion: " + sversion);
|
|
let isRepeater = 0;
|
|
switch (sversion) {
|
|
case "000.000": // UltraVNC repeater
|
|
isRepeater = 1;
|
|
break;
|
|
case "003.003":
|
|
case "003.006": // UltraVNC
|
|
case "003.889": // Apple Remote Desktop
|
|
this._rfbVersion = 3.3;
|
|
break;
|
|
case "003.007":
|
|
this._rfbVersion = 3.7;
|
|
break;
|
|
case "003.008":
|
|
case "004.000": // Intel AMT KVM
|
|
case "004.001": // RealVNC 4.6
|
|
case "005.000": // RealVNC 5.3
|
|
this._rfbVersion = 3.8;
|
|
break;
|
|
default:
|
|
return this._fail("Invalid server version " + sversion);
|
|
}
|
|
|
|
if (isRepeater) {
|
|
let repeaterID = "ID:" + this._repeaterID;
|
|
while (repeaterID.length < 250) {
|
|
repeaterID += "\0";
|
|
}
|
|
this._sock.sendString(repeaterID);
|
|
return true;
|
|
}
|
|
|
|
if (this._rfbVersion > this._rfbMaxVersion) {
|
|
this._rfbVersion = this._rfbMaxVersion;
|
|
}
|
|
|
|
const cversion = "00" + parseInt(this._rfbVersion, 10) +
|
|
".00" + ((this._rfbVersion * 10) % 10);
|
|
this._sock.sendString("RFB " + cversion + "\n");
|
|
Log.Debug('Sent ProtocolVersion: ' + cversion);
|
|
|
|
this._rfbInitState = 'Security';
|
|
}
|
|
|
|
_negotiateSecurity() {
|
|
if (this._rfbVersion >= 3.7) {
|
|
// Server sends supported list, client decides
|
|
const numTypes = this._sock.rQshift8();
|
|
if (this._sock.rQwait("security type", numTypes, 1)) { return false; }
|
|
|
|
if (numTypes === 0) {
|
|
this._rfbInitState = "SecurityReason";
|
|
this._securityContext = "no security types";
|
|
this._securityStatus = 1;
|
|
return this._initMsg();
|
|
}
|
|
|
|
const types = this._sock.rQshiftBytes(numTypes);
|
|
Log.Debug("Server security types: " + types);
|
|
|
|
// Look for each auth in preferred order
|
|
if (types.includes(1)) {
|
|
this._rfbAuthScheme = 1; // None
|
|
} else if (types.includes(22)) {
|
|
this._rfbAuthScheme = 22; // XVP
|
|
} else if (types.includes(16)) {
|
|
this._rfbAuthScheme = 16; // Tight
|
|
} else if (types.includes(2)) {
|
|
this._rfbAuthScheme = 2; // VNC Auth
|
|
} else if (types.includes(19)) {
|
|
this._rfbAuthScheme = 19; // VeNCrypt Auth
|
|
} else {
|
|
return this._fail("Unsupported security types (types: " + types + ")");
|
|
}
|
|
|
|
this._sock.send([this._rfbAuthScheme]);
|
|
} else {
|
|
// Server decides
|
|
if (this._sock.rQwait("security scheme", 4)) { return false; }
|
|
this._rfbAuthScheme = this._sock.rQshift32();
|
|
|
|
if (this._rfbAuthScheme == 0) {
|
|
this._rfbInitState = "SecurityReason";
|
|
this._securityContext = "authentication scheme";
|
|
this._securityStatus = 1;
|
|
return this._initMsg();
|
|
}
|
|
}
|
|
|
|
this._rfbInitState = 'Authentication';
|
|
Log.Debug('Authenticating using scheme: ' + this._rfbAuthScheme);
|
|
|
|
return this._initMsg(); // jump to authentication
|
|
}
|
|
|
|
_handleSecurityReason() {
|
|
if (this._sock.rQwait("reason length", 4)) {
|
|
return false;
|
|
}
|
|
const strlen = this._sock.rQshift32();
|
|
let reason = "";
|
|
|
|
if (strlen > 0) {
|
|
if (this._sock.rQwait("reason", strlen, 4)) { return false; }
|
|
reason = this._sock.rQshiftStr(strlen);
|
|
}
|
|
|
|
if (reason !== "") {
|
|
this.dispatchEvent(new CustomEvent(
|
|
"securityfailure",
|
|
{ detail: { status: this._securityStatus,
|
|
reason: reason } }));
|
|
|
|
return this._fail("Security negotiation failed on " +
|
|
this._securityContext +
|
|
" (reason: " + reason + ")");
|
|
} else {
|
|
this.dispatchEvent(new CustomEvent(
|
|
"securityfailure",
|
|
{ detail: { status: this._securityStatus } }));
|
|
|
|
return this._fail("Security negotiation failed on " +
|
|
this._securityContext);
|
|
}
|
|
}
|
|
|
|
// authentication
|
|
_negotiateXvpAuth() {
|
|
if (this._rfbCredentials.username === undefined ||
|
|
this._rfbCredentials.password === undefined ||
|
|
this._rfbCredentials.target === undefined) {
|
|
this.dispatchEvent(new CustomEvent(
|
|
"credentialsrequired",
|
|
{ detail: { types: ["username", "password", "target"] } }));
|
|
return false;
|
|
}
|
|
|
|
const xvpAuthStr = String.fromCharCode(this._rfbCredentials.username.length) +
|
|
String.fromCharCode(this._rfbCredentials.target.length) +
|
|
this._rfbCredentials.username +
|
|
this._rfbCredentials.target;
|
|
this._sock.sendString(xvpAuthStr);
|
|
this._rfbAuthScheme = 2;
|
|
return this._negotiateAuthentication();
|
|
}
|
|
|
|
// VeNCrypt authentication, currently only supports version 0.2 and only Plain subtype
|
|
_negotiateVeNCryptAuth() {
|
|
|
|
// waiting for VeNCrypt version
|
|
if (this._rfbVeNCryptState == 0) {
|
|
if (this._sock.rQwait("vencrypt version", 2)) { return false; }
|
|
|
|
const major = this._sock.rQshift8();
|
|
const minor = this._sock.rQshift8();
|
|
|
|
if (!(major == 0 && minor == 2)) {
|
|
return this._fail("Unsupported VeNCrypt version " + major + "." + minor);
|
|
}
|
|
|
|
this._sock.send([0, 2]);
|
|
this._rfbVeNCryptState = 1;
|
|
}
|
|
|
|
// waiting for ACK
|
|
if (this._rfbVeNCryptState == 1) {
|
|
if (this._sock.rQwait("vencrypt ack", 1)) { return false; }
|
|
|
|
const res = this._sock.rQshift8();
|
|
|
|
if (res != 0) {
|
|
return this._fail("VeNCrypt failure " + res);
|
|
}
|
|
|
|
this._rfbVeNCryptState = 2;
|
|
}
|
|
// must fall through here (i.e. no "else if"), beacause we may have already received
|
|
// the subtypes length and won't be called again
|
|
|
|
if (this._rfbVeNCryptState == 2) { // waiting for subtypes length
|
|
if (this._sock.rQwait("vencrypt subtypes length", 1)) { return false; }
|
|
|
|
const subtypesLength = this._sock.rQshift8();
|
|
if (subtypesLength < 1) {
|
|
return this._fail("VeNCrypt subtypes empty");
|
|
}
|
|
|
|
this._rfbVeNCryptSubtypesLength = subtypesLength;
|
|
this._rfbVeNCryptState = 3;
|
|
}
|
|
|
|
// waiting for subtypes list
|
|
if (this._rfbVeNCryptState == 3) {
|
|
if (this._sock.rQwait("vencrypt subtypes", 4 * this._rfbVeNCryptSubtypesLength)) { return false; }
|
|
|
|
const subtypes = [];
|
|
for (let i = 0; i < this._rfbVeNCryptSubtypesLength; i++) {
|
|
subtypes.push(this._sock.rQshift32());
|
|
}
|
|
|
|
// 256 = Plain subtype
|
|
if (subtypes.indexOf(256) != -1) {
|
|
// 0x100 = 256
|
|
this._sock.send([0, 0, 1, 0]);
|
|
this._rfbVeNCryptState = 4;
|
|
} else {
|
|
return this._fail("VeNCrypt Plain subtype not offered by server");
|
|
}
|
|
}
|
|
|
|
// negotiated Plain subtype, server waits for password
|
|
if (this._rfbVeNCryptState == 4) {
|
|
if (this._rfbCredentials.username === undefined ||
|
|
this._rfbCredentials.password === undefined) {
|
|
this.dispatchEvent(new CustomEvent(
|
|
"credentialsrequired",
|
|
{ detail: { types: ["username", "password"] } }));
|
|
return false;
|
|
}
|
|
|
|
const user = encodeUTF8(this._rfbCredentials.username);
|
|
const pass = encodeUTF8(this._rfbCredentials.password);
|
|
|
|
this._sock.send([
|
|
(user.length >> 24) & 0xFF,
|
|
(user.length >> 16) & 0xFF,
|
|
(user.length >> 8) & 0xFF,
|
|
user.length & 0xFF
|
|
]);
|
|
this._sock.send([
|
|
(pass.length >> 24) & 0xFF,
|
|
(pass.length >> 16) & 0xFF,
|
|
(pass.length >> 8) & 0xFF,
|
|
pass.length & 0xFF
|
|
]);
|
|
this._sock.sendString(user);
|
|
this._sock.sendString(pass);
|
|
|
|
this._rfbInitState = "SecurityResult";
|
|
return true;
|
|
}
|
|
}
|
|
|
|
_negotiateStdVNCAuth() {
|
|
if (this._sock.rQwait("auth challenge", 16)) { return false; }
|
|
|
|
if (this._rfbCredentials.password === undefined) {
|
|
this.dispatchEvent(new CustomEvent(
|
|
"credentialsrequired",
|
|
{ detail: { types: ["password"] } }));
|
|
return false;
|
|
}
|
|
|
|
// TODO(directxman12): make genDES not require an Array
|
|
const challenge = Array.prototype.slice.call(this._sock.rQshiftBytes(16));
|
|
const response = RFB.genDES(this._rfbCredentials.password, challenge);
|
|
this._sock.send(response);
|
|
this._rfbInitState = "SecurityResult";
|
|
return true;
|
|
}
|
|
|
|
_negotiateTightUnixAuth() {
|
|
if (this._rfbCredentials.username === undefined ||
|
|
this._rfbCredentials.password === undefined) {
|
|
this.dispatchEvent(new CustomEvent(
|
|
"credentialsrequired",
|
|
{ detail: { types: ["username", "password"] } }));
|
|
return false;
|
|
}
|
|
|
|
this._sock.send([0, 0, 0, this._rfbCredentials.username.length]);
|
|
this._sock.send([0, 0, 0, this._rfbCredentials.password.length]);
|
|
this._sock.sendString(this._rfbCredentials.username);
|
|
this._sock.sendString(this._rfbCredentials.password);
|
|
this._rfbInitState = "SecurityResult";
|
|
return true;
|
|
}
|
|
|
|
_negotiateTightTunnels(numTunnels) {
|
|
const clientSupportedTunnelTypes = {
|
|
0: { vendor: 'TGHT', signature: 'NOTUNNEL' }
|
|
};
|
|
const serverSupportedTunnelTypes = {};
|
|
// receive tunnel capabilities
|
|
for (let i = 0; i < numTunnels; i++) {
|
|
const capCode = this._sock.rQshift32();
|
|
const capVendor = this._sock.rQshiftStr(4);
|
|
const capSignature = this._sock.rQshiftStr(8);
|
|
serverSupportedTunnelTypes[capCode] = { vendor: capVendor, signature: capSignature };
|
|
}
|
|
|
|
Log.Debug("Server Tight tunnel types: " + serverSupportedTunnelTypes);
|
|
|
|
// Siemens touch panels have a VNC server that supports NOTUNNEL,
|
|
// but forgets to advertise it. Try to detect such servers by
|
|
// looking for their custom tunnel type.
|
|
if (serverSupportedTunnelTypes[1] &&
|
|
(serverSupportedTunnelTypes[1].vendor === "SICR") &&
|
|
(serverSupportedTunnelTypes[1].signature === "SCHANNEL")) {
|
|
Log.Debug("Detected Siemens server. Assuming NOTUNNEL support.");
|
|
serverSupportedTunnelTypes[0] = { vendor: 'TGHT', signature: 'NOTUNNEL' };
|
|
}
|
|
|
|
// choose the notunnel type
|
|
if (serverSupportedTunnelTypes[0]) {
|
|
if (serverSupportedTunnelTypes[0].vendor != clientSupportedTunnelTypes[0].vendor ||
|
|
serverSupportedTunnelTypes[0].signature != clientSupportedTunnelTypes[0].signature) {
|
|
return this._fail("Client's tunnel type had the incorrect " +
|
|
"vendor or signature");
|
|
}
|
|
Log.Debug("Selected tunnel type: " + clientSupportedTunnelTypes[0]);
|
|
this._sock.send([0, 0, 0, 0]); // use NOTUNNEL
|
|
return false; // wait until we receive the sub auth count to continue
|
|
} else {
|
|
return this._fail("Server wanted tunnels, but doesn't support " +
|
|
"the notunnel type");
|
|
}
|
|
}
|
|
|
|
_negotiateTightAuth() {
|
|
if (!this._rfbTightVNC) { // first pass, do the tunnel negotiation
|
|
if (this._sock.rQwait("num tunnels", 4)) { return false; }
|
|
const numTunnels = this._sock.rQshift32();
|
|
if (numTunnels > 0 && this._sock.rQwait("tunnel capabilities", 16 * numTunnels, 4)) { return false; }
|
|
|
|
this._rfbTightVNC = true;
|
|
|
|
if (numTunnels > 0) {
|
|
this._negotiateTightTunnels(numTunnels);
|
|
return false; // wait until we receive the sub auth to continue
|
|
}
|
|
}
|
|
|
|
// second pass, do the sub-auth negotiation
|
|
if (this._sock.rQwait("sub auth count", 4)) { return false; }
|
|
const subAuthCount = this._sock.rQshift32();
|
|
if (subAuthCount === 0) { // empty sub-auth list received means 'no auth' subtype selected
|
|
this._rfbInitState = 'SecurityResult';
|
|
return true;
|
|
}
|
|
|
|
if (this._sock.rQwait("sub auth capabilities", 16 * subAuthCount, 4)) { return false; }
|
|
|
|
const clientSupportedTypes = {
|
|
'STDVNOAUTH__': 1,
|
|
'STDVVNCAUTH_': 2,
|
|
'TGHTULGNAUTH': 129
|
|
};
|
|
|
|
const serverSupportedTypes = [];
|
|
|
|
for (let i = 0; i < subAuthCount; i++) {
|
|
this._sock.rQshift32(); // capNum
|
|
const capabilities = this._sock.rQshiftStr(12);
|
|
serverSupportedTypes.push(capabilities);
|
|
}
|
|
|
|
Log.Debug("Server Tight authentication types: " + serverSupportedTypes);
|
|
|
|
for (let authType in clientSupportedTypes) {
|
|
if (serverSupportedTypes.indexOf(authType) != -1) {
|
|
this._sock.send([0, 0, 0, clientSupportedTypes[authType]]);
|
|
Log.Debug("Selected authentication type: " + authType);
|
|
|
|
switch (authType) {
|
|
case 'STDVNOAUTH__': // no auth
|
|
this._rfbInitState = 'SecurityResult';
|
|
return true;
|
|
case 'STDVVNCAUTH_': // VNC auth
|
|
this._rfbAuthScheme = 2;
|
|
return this._initMsg();
|
|
case 'TGHTULGNAUTH': // UNIX auth
|
|
this._rfbAuthScheme = 129;
|
|
return this._initMsg();
|
|
default:
|
|
return this._fail("Unsupported tiny auth scheme " +
|
|
"(scheme: " + authType + ")");
|
|
}
|
|
}
|
|
}
|
|
|
|
return this._fail("No supported sub-auth types!");
|
|
}
|
|
|
|
_negotiateAuthentication() {
|
|
switch (this._rfbAuthScheme) {
|
|
case 1: // no auth
|
|
if (this._rfbVersion >= 3.8) {
|
|
this._rfbInitState = 'SecurityResult';
|
|
return true;
|
|
}
|
|
this._rfbInitState = 'ClientInitialisation';
|
|
return this._initMsg();
|
|
|
|
case 22: // XVP auth
|
|
return this._negotiateXvpAuth();
|
|
|
|
case 2: // VNC authentication
|
|
return this._negotiateStdVNCAuth();
|
|
|
|
case 16: // TightVNC Security Type
|
|
return this._negotiateTightAuth();
|
|
|
|
case 19: // VeNCrypt Security Type
|
|
return this._negotiateVeNCryptAuth();
|
|
|
|
case 129: // TightVNC UNIX Security Type
|
|
return this._negotiateTightUnixAuth();
|
|
|
|
default:
|
|
return this._fail("Unsupported auth scheme (scheme: " +
|
|
this._rfbAuthScheme + ")");
|
|
}
|
|
}
|
|
|
|
_handleSecurityResult() {
|
|
if (this._sock.rQwait('VNC auth response ', 4)) { return false; }
|
|
|
|
const status = this._sock.rQshift32();
|
|
|
|
if (status === 0) { // OK
|
|
this._rfbInitState = 'ClientInitialisation';
|
|
Log.Debug('Authentication OK');
|
|
return this._initMsg();
|
|
} else {
|
|
if (this._rfbVersion >= 3.8) {
|
|
this._rfbInitState = "SecurityReason";
|
|
this._securityContext = "security result";
|
|
this._securityStatus = status;
|
|
return this._initMsg();
|
|
} else {
|
|
this.dispatchEvent(new CustomEvent(
|
|
"securityfailure",
|
|
{ detail: { status: status } }));
|
|
|
|
return this._fail("Security handshake failed");
|
|
}
|
|
}
|
|
}
|
|
|
|
_negotiateServerInit() {
|
|
if (this._sock.rQwait("server initialization", 24)) { return false; }
|
|
|
|
/* Screen size */
|
|
const width = this._sock.rQshift16();
|
|
const height = this._sock.rQshift16();
|
|
|
|
/* PIXEL_FORMAT */
|
|
const bpp = this._sock.rQshift8();
|
|
const depth = this._sock.rQshift8();
|
|
const bigEndian = this._sock.rQshift8();
|
|
const trueColor = this._sock.rQshift8();
|
|
|
|
const redMax = this._sock.rQshift16();
|
|
const greenMax = this._sock.rQshift16();
|
|
const blueMax = this._sock.rQshift16();
|
|
const redShift = this._sock.rQshift8();
|
|
const greenShift = this._sock.rQshift8();
|
|
const blueShift = this._sock.rQshift8();
|
|
this._sock.rQskipBytes(3); // padding
|
|
|
|
// NB(directxman12): we don't want to call any callbacks or print messages until
|
|
// *after* we're past the point where we could backtrack
|
|
|
|
/* Connection name/title */
|
|
const nameLength = this._sock.rQshift32();
|
|
if (this._sock.rQwait('server init name', nameLength, 24)) { return false; }
|
|
let name = this._sock.rQshiftStr(nameLength);
|
|
name = decodeUTF8(name, true);
|
|
|
|
if (this._rfbTightVNC) {
|
|
if (this._sock.rQwait('TightVNC extended server init header', 8, 24 + nameLength)) { return false; }
|
|
// In TightVNC mode, ServerInit message is extended
|
|
const numServerMessages = this._sock.rQshift16();
|
|
const numClientMessages = this._sock.rQshift16();
|
|
const numEncodings = this._sock.rQshift16();
|
|
this._sock.rQskipBytes(2); // padding
|
|
|
|
const totalMessagesLength = (numServerMessages + numClientMessages + numEncodings) * 16;
|
|
if (this._sock.rQwait('TightVNC extended server init header', totalMessagesLength, 32 + nameLength)) { return false; }
|
|
|
|
// we don't actually do anything with the capability information that TIGHT sends,
|
|
// so we just skip the all of this.
|
|
|
|
// TIGHT server message capabilities
|
|
this._sock.rQskipBytes(16 * numServerMessages);
|
|
|
|
// TIGHT client message capabilities
|
|
this._sock.rQskipBytes(16 * numClientMessages);
|
|
|
|
// TIGHT encoding capabilities
|
|
this._sock.rQskipBytes(16 * numEncodings);
|
|
}
|
|
|
|
// NB(directxman12): these are down here so that we don't run them multiple times
|
|
// if we backtrack
|
|
Log.Info("Screen: " + width + "x" + height +
|
|
", bpp: " + bpp + ", depth: " + depth +
|
|
", bigEndian: " + bigEndian +
|
|
", trueColor: " + trueColor +
|
|
", redMax: " + redMax +
|
|
", greenMax: " + greenMax +
|
|
", blueMax: " + blueMax +
|
|
", redShift: " + redShift +
|
|
", greenShift: " + greenShift +
|
|
", blueShift: " + blueShift);
|
|
|
|
// we're past the point where we could backtrack, so it's safe to call this
|
|
this._setDesktopName(name);
|
|
this._resize(width, height);
|
|
|
|
if (!this._viewOnly) { this._keyboard.grab(); }
|
|
|
|
this._fbDepth = 24;
|
|
|
|
if (this._fbName === "Intel(r) AMT KVM") {
|
|
Log.Warn("Intel AMT KVM only supports 8/16 bit depths. Using low color mode.");
|
|
this._fbDepth = 8;
|
|
}
|
|
|
|
RFB.messages.pixelFormat(this._sock, this._fbDepth, true);
|
|
this._sendEncodings();
|
|
RFB.messages.fbUpdateRequest(this._sock, false, 0, 0, this._fbWidth, this._fbHeight);
|
|
|
|
this._updateConnectionState('connected');
|
|
return true;
|
|
}
|
|
|
|
_sendEncodings() {
|
|
const encs = [];
|
|
|
|
// In preference order
|
|
encs.push(encodings.encodingCopyRect);
|
|
// Only supported with full depth support
|
|
if (this._fbDepth == 24) {
|
|
encs.push(encodings.encodingTight);
|
|
encs.push(encodings.encodingTightPNG);
|
|
encs.push(encodings.encodingHextile);
|
|
encs.push(encodings.encodingRRE);
|
|
}
|
|
encs.push(encodings.encodingRaw);
|
|
|
|
// Psuedo-encoding settings
|
|
encs.push(encodings.pseudoEncodingQualityLevel0 + this._qualityLevel);
|
|
encs.push(encodings.pseudoEncodingCompressLevel0 + this._compressionLevel);
|
|
|
|
encs.push(encodings.pseudoEncodingDesktopSize);
|
|
encs.push(encodings.pseudoEncodingLastRect);
|
|
encs.push(encodings.pseudoEncodingQEMUExtendedKeyEvent);
|
|
encs.push(encodings.pseudoEncodingExtendedDesktopSize);
|
|
encs.push(encodings.pseudoEncodingXvp);
|
|
encs.push(encodings.pseudoEncodingFence);
|
|
encs.push(encodings.pseudoEncodingContinuousUpdates);
|
|
encs.push(encodings.pseudoEncodingDesktopName);
|
|
encs.push(encodings.pseudoEncodingExtendedClipboard);
|
|
|
|
if (this._fbDepth == 24) {
|
|
encs.push(encodings.pseudoEncodingVMwareCursor);
|
|
encs.push(encodings.pseudoEncodingCursor);
|
|
}
|
|
|
|
RFB.messages.clientEncodings(this._sock, encs);
|
|
}
|
|
|
|
/* RFB protocol initialization states:
|
|
* ProtocolVersion
|
|
* Security
|
|
* Authentication
|
|
* SecurityResult
|
|
* ClientInitialization - not triggered by server message
|
|
* ServerInitialization
|
|
*/
|
|
_initMsg() {
|
|
switch (this._rfbInitState) {
|
|
case 'ProtocolVersion':
|
|
return this._negotiateProtocolVersion();
|
|
|
|
case 'Security':
|
|
return this._negotiateSecurity();
|
|
|
|
case 'Authentication':
|
|
return this._negotiateAuthentication();
|
|
|
|
case 'SecurityResult':
|
|
return this._handleSecurityResult();
|
|
|
|
case 'SecurityReason':
|
|
return this._handleSecurityReason();
|
|
|
|
case 'ClientInitialisation':
|
|
this._sock.send([this._shared ? 1 : 0]); // ClientInitialisation
|
|
this._rfbInitState = 'ServerInitialisation';
|
|
return true;
|
|
|
|
case 'ServerInitialisation':
|
|
return this._negotiateServerInit();
|
|
|
|
default:
|
|
return this._fail("Unknown init state (state: " +
|
|
this._rfbInitState + ")");
|
|
}
|
|
}
|
|
|
|
_handleSetColourMapMsg() {
|
|
Log.Debug("SetColorMapEntries");
|
|
|
|
return this._fail("Unexpected SetColorMapEntries message");
|
|
}
|
|
|
|
_handleServerCutText() {
|
|
Log.Debug("ServerCutText");
|
|
|
|
if (this._sock.rQwait("ServerCutText header", 7, 1)) { return false; }
|
|
|
|
this._sock.rQskipBytes(3); // Padding
|
|
|
|
let length = this._sock.rQshift32();
|
|
length = toSigned32bit(length);
|
|
|
|
if (this._sock.rQwait("ServerCutText content", Math.abs(length), 8)) { return false; }
|
|
|
|
if (length >= 0) {
|
|
//Standard msg
|
|
const text = this._sock.rQshiftStr(length);
|
|
if (this._viewOnly) {
|
|
return true;
|
|
}
|
|
|
|
this.dispatchEvent(new CustomEvent(
|
|
"clipboard",
|
|
{ detail: { text: text } }));
|
|
|
|
} else {
|
|
//Extended msg.
|
|
length = Math.abs(length);
|
|
const flags = this._sock.rQshift32();
|
|
let formats = flags & 0x0000FFFF;
|
|
let actions = flags & 0xFF000000;
|
|
|
|
let isCaps = (!!(actions & extendedClipboardActionCaps));
|
|
if (isCaps) {
|
|
this._clipboardServerCapabilitiesFormats = {};
|
|
this._clipboardServerCapabilitiesActions = {};
|
|
|
|
// Update our server capabilities for Formats
|
|
for (let i = 0; i <= 15; i++) {
|
|
let index = 1 << i;
|
|
|
|
// Check if format flag is set.
|
|
if ((formats & index)) {
|
|
this._clipboardServerCapabilitiesFormats[index] = true;
|
|
// We don't send unsolicited clipboard, so we
|
|
// ignore the size
|
|
this._sock.rQshift32();
|
|
}
|
|
}
|
|
|
|
// Update our server capabilities for Actions
|
|
for (let i = 24; i <= 31; i++) {
|
|
let index = 1 << i;
|
|
this._clipboardServerCapabilitiesActions[index] = !!(actions & index);
|
|
}
|
|
|
|
/* Caps handling done, send caps with the clients
|
|
capabilities set as a response */
|
|
let clientActions = [
|
|
extendedClipboardActionCaps,
|
|
extendedClipboardActionRequest,
|
|
extendedClipboardActionPeek,
|
|
extendedClipboardActionNotify,
|
|
extendedClipboardActionProvide
|
|
];
|
|
RFB.messages.extendedClipboardCaps(this._sock, clientActions, {extendedClipboardFormatText: 0});
|
|
|
|
} else if (actions === extendedClipboardActionRequest) {
|
|
if (this._viewOnly) {
|
|
return true;
|
|
}
|
|
|
|
// Check if server has told us it can handle Provide and there is clipboard data to send.
|
|
if (this._clipboardText != null &&
|
|
this._clipboardServerCapabilitiesActions[extendedClipboardActionProvide]) {
|
|
|
|
if (formats & extendedClipboardFormatText) {
|
|
RFB.messages.extendedClipboardProvide(this._sock, [extendedClipboardFormatText], [this._clipboardText]);
|
|
}
|
|
}
|
|
|
|
} else if (actions === extendedClipboardActionPeek) {
|
|
if (this._viewOnly) {
|
|
return true;
|
|
}
|
|
|
|
if (this._clipboardServerCapabilitiesActions[extendedClipboardActionNotify]) {
|
|
|
|
if (this._clipboardText != null) {
|
|
RFB.messages.extendedClipboardNotify(this._sock, [extendedClipboardFormatText]);
|
|
} else {
|
|
RFB.messages.extendedClipboardNotify(this._sock, []);
|
|
}
|
|
}
|
|
|
|
} else if (actions === extendedClipboardActionNotify) {
|
|
if (this._viewOnly) {
|
|
return true;
|
|
}
|
|
|
|
if (this._clipboardServerCapabilitiesActions[extendedClipboardActionRequest]) {
|
|
|
|
if (formats & extendedClipboardFormatText) {
|
|
RFB.messages.extendedClipboardRequest(this._sock, [extendedClipboardFormatText]);
|
|
}
|
|
}
|
|
|
|
} else if (actions === extendedClipboardActionProvide) {
|
|
if (this._viewOnly) {
|
|
return true;
|
|
}
|
|
|
|
if (!(formats & extendedClipboardFormatText)) {
|
|
return true;
|
|
}
|
|
// Ignore what we had in our clipboard client side.
|
|
this._clipboardText = null;
|
|
|
|
// FIXME: Should probably verify that this data was actually requested
|
|
let zlibStream = this._sock.rQshiftBytes(length - 4);
|
|
let streamInflator = new Inflator();
|
|
let textData = null;
|
|
|
|
streamInflator.setInput(zlibStream);
|
|
for (let i = 0; i <= 15; i++) {
|
|
let format = 1 << i;
|
|
|
|
if (formats & format) {
|
|
|
|
let size = 0x00;
|
|
let sizeArray = streamInflator.inflate(4);
|
|
|
|
size |= (sizeArray[0] << 24);
|
|
size |= (sizeArray[1] << 16);
|
|
size |= (sizeArray[2] << 8);
|
|
size |= (sizeArray[3]);
|
|
let chunk = streamInflator.inflate(size);
|
|
|
|
if (format === extendedClipboardFormatText) {
|
|
textData = chunk;
|
|
}
|
|
}
|
|
}
|
|
streamInflator.setInput(null);
|
|
|
|
if (textData !== null) {
|
|
let tmpText = "";
|
|
for (let i = 0; i < textData.length; i++) {
|
|
tmpText += String.fromCharCode(textData[i]);
|
|
}
|
|
textData = tmpText;
|
|
|
|
textData = decodeUTF8(textData);
|
|
if ((textData.length > 0) && "\0" === textData.charAt(textData.length - 1)) {
|
|
textData = textData.slice(0, -1);
|
|
}
|
|
|
|
textData = textData.replace("\r\n", "\n");
|
|
|
|
this.dispatchEvent(new CustomEvent(
|
|
"clipboard",
|
|
{ detail: { text: textData } }));
|
|
}
|
|
} else {
|
|
return this._fail("Unexpected action in extended clipboard message: " + actions);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
_handleServerFenceMsg() {
|
|
if (this._sock.rQwait("ServerFence header", 8, 1)) { return false; }
|
|
this._sock.rQskipBytes(3); // Padding
|
|
let flags = this._sock.rQshift32();
|
|
let length = this._sock.rQshift8();
|
|
|
|
if (this._sock.rQwait("ServerFence payload", length, 9)) { return false; }
|
|
|
|
if (length > 64) {
|
|
Log.Warn("Bad payload length (" + length + ") in fence response");
|
|
length = 64;
|
|
}
|
|
|
|
const payload = this._sock.rQshiftStr(length);
|
|
|
|
this._supportsFence = true;
|
|
|
|
/*
|
|
* Fence flags
|
|
*
|
|
* (1<<0) - BlockBefore
|
|
* (1<<1) - BlockAfter
|
|
* (1<<2) - SyncNext
|
|
* (1<<31) - Request
|
|
*/
|
|
|
|
if (!(flags & (1<<31))) {
|
|
return this._fail("Unexpected fence response");
|
|
}
|
|
|
|
// Filter out unsupported flags
|
|
// FIXME: support syncNext
|
|
flags &= (1<<0) | (1<<1);
|
|
|
|
// BlockBefore and BlockAfter are automatically handled by
|
|
// the fact that we process each incoming message
|
|
// synchronuosly.
|
|
RFB.messages.clientFence(this._sock, flags, payload);
|
|
|
|
return true;
|
|
}
|
|
|
|
_handleXvpMsg() {
|
|
if (this._sock.rQwait("XVP version and message", 3, 1)) { return false; }
|
|
this._sock.rQskipBytes(1); // Padding
|
|
const xvpVer = this._sock.rQshift8();
|
|
const xvpMsg = this._sock.rQshift8();
|
|
|
|
switch (xvpMsg) {
|
|
case 0: // XVP_FAIL
|
|
Log.Error("XVP Operation Failed");
|
|
break;
|
|
case 1: // XVP_INIT
|
|
this._rfbXvpVer = xvpVer;
|
|
Log.Info("XVP extensions enabled (version " + this._rfbXvpVer + ")");
|
|
this._setCapability("power", true);
|
|
break;
|
|
default:
|
|
this._fail("Illegal server XVP message (msg: " + xvpMsg + ")");
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
_normalMsg() {
|
|
let msgType;
|
|
if (this._FBU.rects > 0) {
|
|
msgType = 0;
|
|
} else {
|
|
msgType = this._sock.rQshift8();
|
|
}
|
|
|
|
let first, ret;
|
|
switch (msgType) {
|
|
case 0: // FramebufferUpdate
|
|
ret = this._framebufferUpdate();
|
|
if (ret && !this._enabledContinuousUpdates) {
|
|
RFB.messages.fbUpdateRequest(this._sock, true, 0, 0,
|
|
this._fbWidth, this._fbHeight);
|
|
}
|
|
return ret;
|
|
|
|
case 1: // SetColorMapEntries
|
|
return this._handleSetColourMapMsg();
|
|
|
|
case 2: // Bell
|
|
Log.Debug("Bell");
|
|
this.dispatchEvent(new CustomEvent(
|
|
"bell",
|
|
{ detail: {} }));
|
|
return true;
|
|
|
|
case 3: // ServerCutText
|
|
return this._handleServerCutText();
|
|
|
|
case 150: // EndOfContinuousUpdates
|
|
first = !this._supportsContinuousUpdates;
|
|
this._supportsContinuousUpdates = true;
|
|
this._enabledContinuousUpdates = false;
|
|
if (first) {
|
|
this._enabledContinuousUpdates = true;
|
|
this._updateContinuousUpdates();
|
|
Log.Info("Enabling continuous updates.");
|
|
} else {
|
|
// FIXME: We need to send a framebufferupdaterequest here
|
|
// if we add support for turning off continuous updates
|
|
}
|
|
return true;
|
|
|
|
case 248: // ServerFence
|
|
return this._handleServerFenceMsg();
|
|
|
|
case 250: // XVP
|
|
return this._handleXvpMsg();
|
|
|
|
default:
|
|
this._fail("Unexpected server message (type " + msgType + ")");
|
|
Log.Debug("sock.rQslice(0, 30): " + this._sock.rQslice(0, 30));
|
|
return true;
|
|
}
|
|
}
|
|
|
|
_onFlush() {
|
|
this._flushing = false;
|
|
// Resume processing
|
|
if (this._sock.rQlen > 0) {
|
|
this._handleMessage();
|
|
}
|
|
}
|
|
|
|
_framebufferUpdate() {
|
|
if (this._FBU.rects === 0) {
|
|
if (this._sock.rQwait("FBU header", 3, 1)) { return false; }
|
|
this._sock.rQskipBytes(1); // Padding
|
|
this._FBU.rects = this._sock.rQshift16();
|
|
|
|
// Make sure the previous frame is fully rendered first
|
|
// to avoid building up an excessive queue
|
|
if (this._display.pending()) {
|
|
this._flushing = true;
|
|
this._display.flush();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
while (this._FBU.rects > 0) {
|
|
if (this._FBU.encoding === null) {
|
|
if (this._sock.rQwait("rect header", 12)) { return false; }
|
|
/* New FramebufferUpdate */
|
|
|
|
const hdr = this._sock.rQshiftBytes(12);
|
|
this._FBU.x = (hdr[0] << 8) + hdr[1];
|
|
this._FBU.y = (hdr[2] << 8) + hdr[3];
|
|
this._FBU.width = (hdr[4] << 8) + hdr[5];
|
|
this._FBU.height = (hdr[6] << 8) + hdr[7];
|
|
this._FBU.encoding = parseInt((hdr[8] << 24) + (hdr[9] << 16) +
|
|
(hdr[10] << 8) + hdr[11], 10);
|
|
}
|
|
|
|
if (!this._handleRect()) {
|
|
return false;
|
|
}
|
|
|
|
this._FBU.rects--;
|
|
this._FBU.encoding = null;
|
|
}
|
|
|
|
this._display.flip();
|
|
|
|
return true; // We finished this FBU
|
|
}
|
|
|
|
_handleRect() {
|
|
switch (this._FBU.encoding) {
|
|
case encodings.pseudoEncodingLastRect:
|
|
this._FBU.rects = 1; // Will be decreased when we return
|
|
return true;
|
|
|
|
case encodings.pseudoEncodingVMwareCursor:
|
|
return this._handleVMwareCursor();
|
|
|
|
case encodings.pseudoEncodingCursor:
|
|
return this._handleCursor();
|
|
|
|
case encodings.pseudoEncodingQEMUExtendedKeyEvent:
|
|
this._qemuExtKeyEventSupported = true;
|
|
return true;
|
|
|
|
case encodings.pseudoEncodingDesktopName:
|
|
return this._handleDesktopName();
|
|
|
|
case encodings.pseudoEncodingDesktopSize:
|
|
this._resize(this._FBU.width, this._FBU.height);
|
|
return true;
|
|
|
|
case encodings.pseudoEncodingExtendedDesktopSize:
|
|
return this._handleExtendedDesktopSize();
|
|
|
|
default:
|
|
return this._handleDataRect();
|
|
}
|
|
}
|
|
|
|
_handleVMwareCursor() {
|
|
const hotx = this._FBU.x; // hotspot-x
|
|
const hoty = this._FBU.y; // hotspot-y
|
|
const w = this._FBU.width;
|
|
const h = this._FBU.height;
|
|
if (this._sock.rQwait("VMware cursor encoding", 1)) {
|
|
return false;
|
|
}
|
|
|
|
const cursorType = this._sock.rQshift8();
|
|
|
|
this._sock.rQshift8(); //Padding
|
|
|
|
let rgba;
|
|
const bytesPerPixel = 4;
|
|
|
|
//Classic cursor
|
|
if (cursorType == 0) {
|
|
//Used to filter away unimportant bits.
|
|
//OR is used for correct conversion in js.
|
|
const PIXEL_MASK = 0xffffff00 | 0;
|
|
rgba = new Array(w * h * bytesPerPixel);
|
|
|
|
if (this._sock.rQwait("VMware cursor classic encoding",
|
|
(w * h * bytesPerPixel) * 2, 2)) {
|
|
return false;
|
|
}
|
|
|
|
let andMask = new Array(w * h);
|
|
for (let pixel = 0; pixel < (w * h); pixel++) {
|
|
andMask[pixel] = this._sock.rQshift32();
|
|
}
|
|
|
|
let xorMask = new Array(w * h);
|
|
for (let pixel = 0; pixel < (w * h); pixel++) {
|
|
xorMask[pixel] = this._sock.rQshift32();
|
|
}
|
|
|
|
for (let pixel = 0; pixel < (w * h); pixel++) {
|
|
if (andMask[pixel] == 0) {
|
|
//Fully opaque pixel
|
|
let bgr = xorMask[pixel];
|
|
let r = bgr >> 8 & 0xff;
|
|
let g = bgr >> 16 & 0xff;
|
|
let b = bgr >> 24 & 0xff;
|
|
|
|
rgba[(pixel * bytesPerPixel) ] = r; //r
|
|
rgba[(pixel * bytesPerPixel) + 1 ] = g; //g
|
|
rgba[(pixel * bytesPerPixel) + 2 ] = b; //b
|
|
rgba[(pixel * bytesPerPixel) + 3 ] = 0xff; //a
|
|
|
|
} else if ((andMask[pixel] & PIXEL_MASK) ==
|
|
PIXEL_MASK) {
|
|
//Only screen value matters, no mouse colouring
|
|
if (xorMask[pixel] == 0) {
|
|
//Transparent pixel
|
|
rgba[(pixel * bytesPerPixel) ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 1 ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 2 ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 3 ] = 0x00;
|
|
|
|
} else if ((xorMask[pixel] & PIXEL_MASK) ==
|
|
PIXEL_MASK) {
|
|
//Inverted pixel, not supported in browsers.
|
|
//Fully opaque instead.
|
|
rgba[(pixel * bytesPerPixel) ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 1 ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 2 ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 3 ] = 0xff;
|
|
|
|
} else {
|
|
//Unhandled xorMask
|
|
rgba[(pixel * bytesPerPixel) ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 1 ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 2 ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 3 ] = 0xff;
|
|
}
|
|
|
|
} else {
|
|
//Unhandled andMask
|
|
rgba[(pixel * bytesPerPixel) ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 1 ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 2 ] = 0x00;
|
|
rgba[(pixel * bytesPerPixel) + 3 ] = 0xff;
|
|
}
|
|
}
|
|
|
|
//Alpha cursor.
|
|
} else if (cursorType == 1) {
|
|
if (this._sock.rQwait("VMware cursor alpha encoding",
|
|
(w * h * 4), 2)) {
|
|
return false;
|
|
}
|
|
|
|
rgba = new Array(w * h * bytesPerPixel);
|
|
|
|
for (let pixel = 0; pixel < (w * h); pixel++) {
|
|
let data = this._sock.rQshift32();
|
|
|
|
rgba[(pixel * 4) ] = data >> 24 & 0xff; //r
|
|
rgba[(pixel * 4) + 1 ] = data >> 16 & 0xff; //g
|
|
rgba[(pixel * 4) + 2 ] = data >> 8 & 0xff; //b
|
|
rgba[(pixel * 4) + 3 ] = data & 0xff; //a
|
|
}
|
|
|
|
} else {
|
|
Log.Warn("The given cursor type is not supported: "
|
|
+ cursorType + " given.");
|
|
return false;
|
|
}
|
|
|
|
this._updateCursor(rgba, hotx, hoty, w, h);
|
|
|
|
return true;
|
|
}
|
|
|
|
_handleCursor() {
|
|
const hotx = this._FBU.x; // hotspot-x
|
|
const hoty = this._FBU.y; // hotspot-y
|
|
const w = this._FBU.width;
|
|
const h = this._FBU.height;
|
|
|
|
const pixelslength = w * h * 4;
|
|
const masklength = Math.ceil(w / 8) * h;
|
|
|
|
let bytes = pixelslength + masklength;
|
|
if (this._sock.rQwait("cursor encoding", bytes)) {
|
|
return false;
|
|
}
|
|
|
|
// Decode from BGRX pixels + bit mask to RGBA
|
|
const pixels = this._sock.rQshiftBytes(pixelslength);
|
|
const mask = this._sock.rQshiftBytes(masklength);
|
|
let rgba = new Uint8Array(w * h * 4);
|
|
|
|
let pixIdx = 0;
|
|
for (let y = 0; y < h; y++) {
|
|
for (let x = 0; x < w; x++) {
|
|
let maskIdx = y * Math.ceil(w / 8) + Math.floor(x / 8);
|
|
let alpha = (mask[maskIdx] << (x % 8)) & 0x80 ? 255 : 0;
|
|
rgba[pixIdx ] = pixels[pixIdx + 2];
|
|
rgba[pixIdx + 1] = pixels[pixIdx + 1];
|
|
rgba[pixIdx + 2] = pixels[pixIdx];
|
|
rgba[pixIdx + 3] = alpha;
|
|
pixIdx += 4;
|
|
}
|
|
}
|
|
|
|
this._updateCursor(rgba, hotx, hoty, w, h);
|
|
|
|
return true;
|
|
}
|
|
|
|
_handleDesktopName() {
|
|
if (this._sock.rQwait("DesktopName", 4)) {
|
|
return false;
|
|
}
|
|
|
|
let length = this._sock.rQshift32();
|
|
|
|
if (this._sock.rQwait("DesktopName", length, 4)) {
|
|
return false;
|
|
}
|
|
|
|
let name = this._sock.rQshiftStr(length);
|
|
name = decodeUTF8(name, true);
|
|
|
|
this._setDesktopName(name);
|
|
|
|
return true;
|
|
}
|
|
|
|
_handleExtendedDesktopSize() {
|
|
if (this._sock.rQwait("ExtendedDesktopSize", 4)) {
|
|
return false;
|
|
}
|
|
|
|
const numberOfScreens = this._sock.rQpeek8();
|
|
|
|
let bytes = 4 + (numberOfScreens * 16);
|
|
if (this._sock.rQwait("ExtendedDesktopSize", bytes)) {
|
|
return false;
|
|
}
|
|
|
|
const firstUpdate = !this._supportsSetDesktopSize;
|
|
this._supportsSetDesktopSize = true;
|
|
|
|
// Normally we only apply the current resize mode after a
|
|
// window resize event. However there is no such trigger on the
|
|
// initial connect. And we don't know if the server supports
|
|
// resizing until we've gotten here.
|
|
if (firstUpdate) {
|
|
this._requestRemoteResize();
|
|
}
|
|
|
|
this._sock.rQskipBytes(1); // number-of-screens
|
|
this._sock.rQskipBytes(3); // padding
|
|
|
|
for (let i = 0; i < numberOfScreens; i += 1) {
|
|
// Save the id and flags of the first screen
|
|
if (i === 0) {
|
|
this._screenID = this._sock.rQshiftBytes(4); // id
|
|
this._sock.rQskipBytes(2); // x-position
|
|
this._sock.rQskipBytes(2); // y-position
|
|
this._sock.rQskipBytes(2); // width
|
|
this._sock.rQskipBytes(2); // height
|
|
this._screenFlags = this._sock.rQshiftBytes(4); // flags
|
|
} else {
|
|
this._sock.rQskipBytes(16);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The x-position indicates the reason for the change:
|
|
*
|
|
* 0 - server resized on its own
|
|
* 1 - this client requested the resize
|
|
* 2 - another client requested the resize
|
|
*/
|
|
|
|
// We need to handle errors when we requested the resize.
|
|
if (this._FBU.x === 1 && this._FBU.y !== 0) {
|
|
let msg = "";
|
|
// The y-position indicates the status code from the server
|
|
switch (this._FBU.y) {
|
|
case 1:
|
|
msg = "Resize is administratively prohibited";
|
|
break;
|
|
case 2:
|
|
msg = "Out of resources";
|
|
break;
|
|
case 3:
|
|
msg = "Invalid screen layout";
|
|
break;
|
|
default:
|
|
msg = "Unknown reason";
|
|
break;
|
|
}
|
|
Log.Warn("Server did not accept the resize request: "
|
|
+ msg);
|
|
} else {
|
|
this._resize(this._FBU.width, this._FBU.height);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
_handleDataRect() {
|
|
let decoder = this._decoders[this._FBU.encoding];
|
|
if (!decoder) {
|
|
this._fail("Unsupported encoding (encoding: " +
|
|
this._FBU.encoding + ")");
|
|
return false;
|
|
}
|
|
|
|
try {
|
|
return decoder.decodeRect(this._FBU.x, this._FBU.y,
|
|
this._FBU.width, this._FBU.height,
|
|
this._sock, this._display,
|
|
this._fbDepth);
|
|
} catch (err) {
|
|
this._fail("Error decoding rect: " + err);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
_updateContinuousUpdates() {
|
|
if (!this._enabledContinuousUpdates) { return; }
|
|
|
|
RFB.messages.enableContinuousUpdates(this._sock, true, 0, 0,
|
|
this._fbWidth, this._fbHeight);
|
|
}
|
|
|
|
_resize(width, height) {
|
|
this._fbWidth = width;
|
|
this._fbHeight = height;
|
|
|
|
this._display.resize(this._fbWidth, this._fbHeight);
|
|
|
|
// Adjust the visible viewport based on the new dimensions
|
|
this._updateClip();
|
|
this._updateScale();
|
|
|
|
this._updateContinuousUpdates();
|
|
}
|
|
|
|
_xvpOp(ver, op) {
|
|
if (this._rfbXvpVer < ver) { return; }
|
|
Log.Info("Sending XVP operation " + op + " (version " + ver + ")");
|
|
RFB.messages.xvpOp(this._sock, ver, op);
|
|
}
|
|
|
|
_updateCursor(rgba, hotx, hoty, w, h) {
|
|
this._cursorImage = {
|
|
rgbaPixels: rgba,
|
|
hotx: hotx, hoty: hoty, w: w, h: h,
|
|
};
|
|
this._refreshCursor();
|
|
}
|
|
|
|
_shouldShowDotCursor() {
|
|
// Called when this._cursorImage is updated
|
|
if (!this._showDotCursor) {
|
|
// User does not want to see the dot, so...
|
|
return false;
|
|
}
|
|
|
|
// The dot should not be shown if the cursor is already visible,
|
|
// i.e. contains at least one not-fully-transparent pixel.
|
|
// So iterate through all alpha bytes in rgba and stop at the
|
|
// first non-zero.
|
|
for (let i = 3; i < this._cursorImage.rgbaPixels.length; i += 4) {
|
|
if (this._cursorImage.rgbaPixels[i]) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// At this point, we know that the cursor is fully transparent, and
|
|
// the user wants to see the dot instead of this.
|
|
return true;
|
|
}
|
|
|
|
_refreshCursor() {
|
|
if (this._rfbConnectionState !== "connecting" &&
|
|
this._rfbConnectionState !== "connected") {
|
|
return;
|
|
}
|
|
const image = this._shouldShowDotCursor() ? RFB.cursors.dot : this._cursorImage;
|
|
this._cursor.change(image.rgbaPixels,
|
|
image.hotx, image.hoty,
|
|
image.w, image.h
|
|
);
|
|
}
|
|
|
|
static genDES(password, challenge) {
|
|
const passwordChars = password.split('').map(c => c.charCodeAt(0));
|
|
return (new DES(passwordChars)).encrypt(challenge);
|
|
}
|
|
}
|
|
|
|
// Class Methods
|
|
RFB.messages = {
|
|
keyEvent(sock, keysym, down) {
|
|
const buff = sock._sQ;
|
|
const offset = sock._sQlen;
|
|
|
|
buff[offset] = 4; // msg-type
|
|
buff[offset + 1] = down;
|
|
|
|
buff[offset + 2] = 0;
|
|
buff[offset + 3] = 0;
|
|
|
|
buff[offset + 4] = (keysym >> 24);
|
|
buff[offset + 5] = (keysym >> 16);
|
|
buff[offset + 6] = (keysym >> 8);
|
|
buff[offset + 7] = keysym;
|
|
|
|
sock._sQlen += 8;
|
|
sock.flush();
|
|
},
|
|
|
|
QEMUExtendedKeyEvent(sock, keysym, down, keycode) {
|
|
function getRFBkeycode(xtScanCode) {
|
|
const upperByte = (keycode >> 8);
|
|
const lowerByte = (keycode & 0x00ff);
|
|
if (upperByte === 0xe0 && lowerByte < 0x7f) {
|
|
return lowerByte | 0x80;
|
|
}
|
|
return xtScanCode;
|
|
}
|
|
|
|
const buff = sock._sQ;
|
|
const offset = sock._sQlen;
|
|
|
|
buff[offset] = 255; // msg-type
|
|
buff[offset + 1] = 0; // sub msg-type
|
|
|
|
buff[offset + 2] = (down >> 8);
|
|
buff[offset + 3] = down;
|
|
|
|
buff[offset + 4] = (keysym >> 24);
|
|
buff[offset + 5] = (keysym >> 16);
|
|
buff[offset + 6] = (keysym >> 8);
|
|
buff[offset + 7] = keysym;
|
|
|
|
const RFBkeycode = getRFBkeycode(keycode);
|
|
|
|
buff[offset + 8] = (RFBkeycode >> 24);
|
|
buff[offset + 9] = (RFBkeycode >> 16);
|
|
buff[offset + 10] = (RFBkeycode >> 8);
|
|
buff[offset + 11] = RFBkeycode;
|
|
|
|
sock._sQlen += 12;
|
|
sock.flush();
|
|
},
|
|
|
|
pointerEvent(sock, x, y, mask) {
|
|
const buff = sock._sQ;
|
|
const offset = sock._sQlen;
|
|
|
|
buff[offset] = 5; // msg-type
|
|
|
|
buff[offset + 1] = mask;
|
|
|
|
buff[offset + 2] = x >> 8;
|
|
buff[offset + 3] = x;
|
|
|
|
buff[offset + 4] = y >> 8;
|
|
buff[offset + 5] = y;
|
|
|
|
sock._sQlen += 6;
|
|
sock.flush();
|
|
},
|
|
|
|
// Used to build Notify and Request data.
|
|
_buildExtendedClipboardFlags(actions, formats) {
|
|
let data = new Uint8Array(4);
|
|
let formatFlag = 0x00000000;
|
|
let actionFlag = 0x00000000;
|
|
|
|
for (let i = 0; i < actions.length; i++) {
|
|
actionFlag |= actions[i];
|
|
}
|
|
|
|
for (let i = 0; i < formats.length; i++) {
|
|
formatFlag |= formats[i];
|
|
}
|
|
|
|
data[0] = actionFlag >> 24; // Actions
|
|
data[1] = 0x00; // Reserved
|
|
data[2] = 0x00; // Reserved
|
|
data[3] = formatFlag; // Formats
|
|
|
|
return data;
|
|
},
|
|
|
|
extendedClipboardProvide(sock, formats, inData) {
|
|
// Deflate incomming data and their sizes
|
|
let deflator = new Deflator();
|
|
let dataToDeflate = [];
|
|
|
|
for (let i = 0; i < formats.length; i++) {
|
|
// We only support the format Text at this time
|
|
if (formats[i] != extendedClipboardFormatText) {
|
|
throw new Error("Unsupported extended clipboard format for Provide message.");
|
|
}
|
|
|
|
// Change lone \r or \n into \r\n as defined in rfbproto
|
|
inData[i] = inData[i].replace(/\r\n|\r|\n/gm, "\r\n");
|
|
|
|
// Check if it already has \0
|
|
let text = encodeUTF8(inData[i] + "\0");
|
|
|
|
dataToDeflate.push( (text.length >> 24) & 0xFF,
|
|
(text.length >> 16) & 0xFF,
|
|
(text.length >> 8) & 0xFF,
|
|
(text.length & 0xFF));
|
|
|
|
for (let j = 0; j < text.length; j++) {
|
|
dataToDeflate.push(text.charCodeAt(j));
|
|
}
|
|
}
|
|
|
|
let deflatedData = deflator.deflate(new Uint8Array(dataToDeflate));
|
|
|
|
// Build data to send
|
|
let data = new Uint8Array(4 + deflatedData.length);
|
|
data.set(RFB.messages._buildExtendedClipboardFlags([extendedClipboardActionProvide],
|
|
formats));
|
|
data.set(deflatedData, 4);
|
|
|
|
RFB.messages.clientCutText(sock, data, true);
|
|
},
|
|
|
|
extendedClipboardNotify(sock, formats) {
|
|
let flags = RFB.messages._buildExtendedClipboardFlags([extendedClipboardActionNotify],
|
|
formats);
|
|
RFB.messages.clientCutText(sock, flags, true);
|
|
},
|
|
|
|
extendedClipboardRequest(sock, formats) {
|
|
let flags = RFB.messages._buildExtendedClipboardFlags([extendedClipboardActionRequest],
|
|
formats);
|
|
RFB.messages.clientCutText(sock, flags, true);
|
|
},
|
|
|
|
extendedClipboardCaps(sock, actions, formats) {
|
|
let formatKeys = Object.keys(formats);
|
|
let data = new Uint8Array(4 + (4 * formatKeys.length));
|
|
|
|
formatKeys.map(x => parseInt(x));
|
|
formatKeys.sort((a, b) => a - b);
|
|
|
|
data.set(RFB.messages._buildExtendedClipboardFlags(actions, []));
|
|
|
|
let loopOffset = 4;
|
|
for (let i = 0; i < formatKeys.length; i++) {
|
|
data[loopOffset] = formats[formatKeys[i]] >> 24;
|
|
data[loopOffset + 1] = formats[formatKeys[i]] >> 16;
|
|
data[loopOffset + 2] = formats[formatKeys[i]] >> 8;
|
|
data[loopOffset + 3] = formats[formatKeys[i]] >> 0;
|
|
|
|
loopOffset += 4;
|
|
data[3] |= (1 << formatKeys[i]); // Update our format flags
|
|
}
|
|
|
|
RFB.messages.clientCutText(sock, data, true);
|
|
},
|
|
|
|
clientCutText(sock, data, extended = false) {
|
|
const buff = sock._sQ;
|
|
const offset = sock._sQlen;
|
|
|
|
buff[offset] = 6; // msg-type
|
|
|
|
buff[offset + 1] = 0; // padding
|
|
buff[offset + 2] = 0; // padding
|
|
buff[offset + 3] = 0; // padding
|
|
|
|
let length;
|
|
if (extended) {
|
|
length = toUnsigned32bit(-data.length);
|
|
} else {
|
|
length = data.length;
|
|
}
|
|
|
|
buff[offset + 4] = length >> 24;
|
|
buff[offset + 5] = length >> 16;
|
|
buff[offset + 6] = length >> 8;
|
|
buff[offset + 7] = length;
|
|
|
|
sock._sQlen += 8;
|
|
|
|
// We have to keep track of from where in the data we begin creating the
|
|
// buffer for the flush in the next iteration.
|
|
let dataOffset = 0;
|
|
|
|
let remaining = data.length;
|
|
while (remaining > 0) {
|
|
|
|
let flushSize = Math.min(remaining, (sock._sQbufferSize - sock._sQlen));
|
|
for (let i = 0; i < flushSize; i++) {
|
|
buff[sock._sQlen + i] = data[dataOffset + i];
|
|
}
|
|
|
|
sock._sQlen += flushSize;
|
|
sock.flush();
|
|
|
|
remaining -= flushSize;
|
|
dataOffset += flushSize;
|
|
}
|
|
|
|
},
|
|
|
|
setDesktopSize(sock, width, height, id, flags) {
|
|
const buff = sock._sQ;
|
|
const offset = sock._sQlen;
|
|
|
|
buff[offset] = 251; // msg-type
|
|
buff[offset + 1] = 0; // padding
|
|
buff[offset + 2] = width >> 8; // width
|
|
buff[offset + 3] = width;
|
|
buff[offset + 4] = height >> 8; // height
|
|
buff[offset + 5] = height;
|
|
|
|
buff[offset + 6] = 1; // number-of-screens
|
|
buff[offset + 7] = 0; // padding
|
|
|
|
// screen array
|
|
buff[offset + 8] = id >> 24; // id
|
|
buff[offset + 9] = id >> 16;
|
|
buff[offset + 10] = id >> 8;
|
|
buff[offset + 11] = id;
|
|
buff[offset + 12] = 0; // x-position
|
|
buff[offset + 13] = 0;
|
|
buff[offset + 14] = 0; // y-position
|
|
buff[offset + 15] = 0;
|
|
buff[offset + 16] = width >> 8; // width
|
|
buff[offset + 17] = width;
|
|
buff[offset + 18] = height >> 8; // height
|
|
buff[offset + 19] = height;
|
|
buff[offset + 20] = flags >> 24; // flags
|
|
buff[offset + 21] = flags >> 16;
|
|
buff[offset + 22] = flags >> 8;
|
|
buff[offset + 23] = flags;
|
|
|
|
sock._sQlen += 24;
|
|
sock.flush();
|
|
},
|
|
|
|
clientFence(sock, flags, payload) {
|
|
const buff = sock._sQ;
|
|
const offset = sock._sQlen;
|
|
|
|
buff[offset] = 248; // msg-type
|
|
|
|
buff[offset + 1] = 0; // padding
|
|
buff[offset + 2] = 0; // padding
|
|
buff[offset + 3] = 0; // padding
|
|
|
|
buff[offset + 4] = flags >> 24; // flags
|
|
buff[offset + 5] = flags >> 16;
|
|
buff[offset + 6] = flags >> 8;
|
|
buff[offset + 7] = flags;
|
|
|
|
const n = payload.length;
|
|
|
|
buff[offset + 8] = n; // length
|
|
|
|
for (let i = 0; i < n; i++) {
|
|
buff[offset + 9 + i] = payload.charCodeAt(i);
|
|
}
|
|
|
|
sock._sQlen += 9 + n;
|
|
sock.flush();
|
|
},
|
|
|
|
enableContinuousUpdates(sock, enable, x, y, width, height) {
|
|
const buff = sock._sQ;
|
|
const offset = sock._sQlen;
|
|
|
|
buff[offset] = 150; // msg-type
|
|
buff[offset + 1] = enable; // enable-flag
|
|
|
|
buff[offset + 2] = x >> 8; // x
|
|
buff[offset + 3] = x;
|
|
buff[offset + 4] = y >> 8; // y
|
|
buff[offset + 5] = y;
|
|
buff[offset + 6] = width >> 8; // width
|
|
buff[offset + 7] = width;
|
|
buff[offset + 8] = height >> 8; // height
|
|
buff[offset + 9] = height;
|
|
|
|
sock._sQlen += 10;
|
|
sock.flush();
|
|
},
|
|
|
|
pixelFormat(sock, depth, trueColor) {
|
|
const buff = sock._sQ;
|
|
const offset = sock._sQlen;
|
|
|
|
let bpp;
|
|
|
|
if (depth > 16) {
|
|
bpp = 32;
|
|
} else if (depth > 8) {
|
|
bpp = 16;
|
|
} else {
|
|
bpp = 8;
|
|
}
|
|
|
|
const bits = Math.floor(depth/3);
|
|
|
|
buff[offset] = 0; // msg-type
|
|
|
|
buff[offset + 1] = 0; // padding
|
|
buff[offset + 2] = 0; // padding
|
|
buff[offset + 3] = 0; // padding
|
|
|
|
buff[offset + 4] = bpp; // bits-per-pixel
|
|
buff[offset + 5] = depth; // depth
|
|
buff[offset + 6] = 0; // little-endian
|
|
buff[offset + 7] = trueColor ? 1 : 0; // true-color
|
|
|
|
buff[offset + 8] = 0; // red-max
|
|
buff[offset + 9] = (1 << bits) - 1; // red-max
|
|
|
|
buff[offset + 10] = 0; // green-max
|
|
buff[offset + 11] = (1 << bits) - 1; // green-max
|
|
|
|
buff[offset + 12] = 0; // blue-max
|
|
buff[offset + 13] = (1 << bits) - 1; // blue-max
|
|
|
|
buff[offset + 14] = bits * 0; // red-shift
|
|
buff[offset + 15] = bits * 1; // green-shift
|
|
buff[offset + 16] = bits * 2; // blue-shift
|
|
|
|
buff[offset + 17] = 0; // padding
|
|
buff[offset + 18] = 0; // padding
|
|
buff[offset + 19] = 0; // padding
|
|
|
|
sock._sQlen += 20;
|
|
sock.flush();
|
|
},
|
|
|
|
clientEncodings(sock, encodings) {
|
|
const buff = sock._sQ;
|
|
const offset = sock._sQlen;
|
|
|
|
buff[offset] = 2; // msg-type
|
|
buff[offset + 1] = 0; // padding
|
|
|
|
buff[offset + 2] = encodings.length >> 8;
|
|
buff[offset + 3] = encodings.length;
|
|
|
|
let j = offset + 4;
|
|
for (let i = 0; i < encodings.length; i++) {
|
|
const enc = encodings[i];
|
|
buff[j] = enc >> 24;
|
|
buff[j + 1] = enc >> 16;
|
|
buff[j + 2] = enc >> 8;
|
|
buff[j + 3] = enc;
|
|
|
|
j += 4;
|
|
}
|
|
|
|
sock._sQlen += j - offset;
|
|
sock.flush();
|
|
},
|
|
|
|
fbUpdateRequest(sock, incremental, x, y, w, h) {
|
|
const buff = sock._sQ;
|
|
const offset = sock._sQlen;
|
|
|
|
if (typeof(x) === "undefined") { x = 0; }
|
|
if (typeof(y) === "undefined") { y = 0; }
|
|
|
|
buff[offset] = 3; // msg-type
|
|
buff[offset + 1] = incremental ? 1 : 0;
|
|
|
|
buff[offset + 2] = (x >> 8) & 0xFF;
|
|
buff[offset + 3] = x & 0xFF;
|
|
|
|
buff[offset + 4] = (y >> 8) & 0xFF;
|
|
buff[offset + 5] = y & 0xFF;
|
|
|
|
buff[offset + 6] = (w >> 8) & 0xFF;
|
|
buff[offset + 7] = w & 0xFF;
|
|
|
|
buff[offset + 8] = (h >> 8) & 0xFF;
|
|
buff[offset + 9] = h & 0xFF;
|
|
|
|
sock._sQlen += 10;
|
|
sock.flush();
|
|
},
|
|
|
|
xvpOp(sock, ver, op) {
|
|
const buff = sock._sQ;
|
|
const offset = sock._sQlen;
|
|
|
|
buff[offset] = 250; // msg-type
|
|
buff[offset + 1] = 0; // padding
|
|
|
|
buff[offset + 2] = ver;
|
|
buff[offset + 3] = op;
|
|
|
|
sock._sQlen += 4;
|
|
sock.flush();
|
|
}
|
|
};
|
|
|
|
RFB.cursors = {
|
|
none: {
|
|
rgbaPixels: new Uint8Array(),
|
|
w: 0, h: 0,
|
|
hotx: 0, hoty: 0,
|
|
},
|
|
|
|
dot: {
|
|
/* eslint-disable indent */
|
|
rgbaPixels: new Uint8Array([
|
|
255, 255, 255, 255, 0, 0, 0, 255, 255, 255, 255, 255,
|
|
0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 255,
|
|
255, 255, 255, 255, 0, 0, 0, 255, 255, 255, 255, 255,
|
|
]),
|
|
/* eslint-enable indent */
|
|
w: 3, h: 3,
|
|
hotx: 1, hoty: 1,
|
|
}
|
|
};
|