mirror of
https://github.com/retspen/webvirtcloud
synced 2024-12-27 00:25:22 +00:00
2073 lines
68 KiB
JavaScript
Executable file
2073 lines
68 KiB
JavaScript
Executable file
/*
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* noVNC: HTML5 VNC client
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* Copyright (C) 2018 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 * as Log from './util/logging.js';
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import { decodeUTF8 } from './util/strings.js';
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import { dragThreshold } from './util/browser.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 Keyboard from "./input/keyboard.js";
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import Mouse from "./input/mouse.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 "./util/polyfill.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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export default class RFB extends EventTargetMixin {
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constructor(target, url, 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 (!url) {
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throw new Error("Must specify URL");
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}
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super();
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this._target = target;
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this._url = url;
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// Connection details
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options = options || {};
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this._rfb_credentials = 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._showDotCursor = options.showDotCursor || false;
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// Internal state
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this._rfb_connection_state = '';
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this._rfb_init_state = '';
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this._rfb_auth_scheme = -1;
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this._rfb_clean_disconnect = true;
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// Server capabilities
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this._rfb_version = 0;
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this._rfb_max_version = 3.8;
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this._rfb_tightvnc = false;
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this._rfb_xvp_ver = 0;
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this._fb_width = 0;
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this._fb_height = 0;
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this._fb_name = "";
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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._screen_id = 0;
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this._screen_flags = 0;
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this._qemuExtKeyEventSupported = false;
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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._mouse = null; // Mouse input handler 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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// 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._mouse_buttonMask = 0;
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this._mouse_arr = [];
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this._viewportDragging = false;
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this._viewportDragPos = {};
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this._viewportHasMoved = false;
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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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windowResize: this._windowResize.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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// IE miscalculates width without this :(
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this._canvas.style.flexShrink = '0';
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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._display.clear();
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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._mouse = new Mouse(this._canvas);
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this._mouse.onmousebutton = this._handleMouseButton.bind(this);
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this._mouse.onmousemove = this._handleMouseMove.bind(this);
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this._sock = new Websock();
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this._sock.on('message', () => {
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this._handle_message();
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});
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this._sock.on('open', () => {
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if ((this._rfb_connection_state === 'connecting') &&
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(this._rfb_init_state === '')) {
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this._rfb_init_state = 'ProtocolVersion';
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Log.Debug("Starting VNC handshake");
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} else {
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this._fail("Unexpected server connection while " +
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this._rfb_connection_state);
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}
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});
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this._sock.on('close', (e) => {
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Log.Debug("WebSocket on-close event");
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let msg = "";
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if (e.code) {
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msg = "(code: " + e.code;
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if (e.reason) {
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msg += ", reason: " + e.reason;
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}
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msg += ")";
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}
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switch (this._rfb_connection_state) {
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case 'connecting':
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this._fail("Connection closed " + msg);
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break;
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case 'connected':
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// Handle disconnects that were initiated server-side
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this._updateConnectionState('disconnecting');
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this._updateConnectionState('disconnected');
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break;
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case 'disconnecting':
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// Normal disconnection path
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this._updateConnectionState('disconnected');
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break;
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case 'disconnected':
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this._fail("Unexpected server disconnect " +
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"when already disconnected " + msg);
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break;
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default:
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this._fail("Unexpected server disconnect before connecting " +
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msg);
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break;
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}
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this._sock.off('close');
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});
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this._sock.on('error', e => Log.Warn("WebSocket on-error event"));
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// Slight delay of the actual connection so that the caller has
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// time to set up callbacks
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setTimeout(this._updateConnectionState.bind(this, '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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}
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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._rfb_connection_state === "connecting" ||
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this._rfb_connection_state === "connected") {
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if (viewOnly) {
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this._keyboard.ungrab();
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this._mouse.ungrab();
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} else {
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this._keyboard.grab();
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this._mouse.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 this._mouse.touchButton; }
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set touchButton(button) { this._mouse.touchButton = button; }
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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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// ===== 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._rfb_credentials = creds;
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setTimeout(this._init_msg.bind(this), 0);
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}
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sendCtrlAltDel() {
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if (this._rfb_connection_state !== '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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sendCtrlAltFN(f) {
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var keys_code=[0xFFBE,0xFFBF,0xFFC0,0xFFC1,0xFFC2,0xFFC3,0xFFC4,0xFFC5,0xFFC6,0xFFC7,0xFFC8,0xFFC9];
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if (keys_code[f]==undefined) {
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return;
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}
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if (this._rfb_connection_state !== 'connected' || this._viewOnly) {
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return;
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}
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Log.Info("Sending Ctrl-Alt-" + f);
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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(keys_code[f], "Fn", true);
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this.sendKey(keys_code[f], "Fn", 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._rfb_connection_state !== '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._rfb_connection_state !== 'connected' || this._viewOnly) { return; }
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RFB.messages.clientCutText(this._sock, text);
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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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Log.Info("connecting to " + this._url);
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try {
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// WebSocket.onopen transitions to the RFB init states
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this._sock.open(this._url, ['binary']);
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} catch (e) {
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if (e.name === 'SyntaxError') {
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this._fail("Invalid host or port (" + e + ")");
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} else {
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this._fail("Error when opening socket (" + e + ")");
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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._cursor.attach(this._canvas);
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this._refreshCursor();
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// Monitor size changes of the screen
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// FIXME: Use ResizeObserver, or hidden overflow
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window.addEventListener('resize', this._eventHandlers.windowResize);
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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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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("mousedown", this._eventHandlers.focusCanvas);
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this._canvas.removeEventListener("touchstart", this._eventHandlers.focusCanvas);
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window.removeEventListener('resize', this._eventHandlers.windowResize);
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this._keyboard.ungrab();
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this._mouse.ungrab();
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this._sock.close();
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try {
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this._target.removeChild(this._screen);
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} catch (e) {
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if (e.name === 'NotFoundError') {
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// Some cases where the initial connection fails
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// can disconnect before the _screen is created
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} else {
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throw e;
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}
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}
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clearTimeout(this._resizeTimeout);
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Log.Debug("<< RFB.disconnect");
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}
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_focusCanvas(event) {
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// Respect earlier handlers' request to not do side-effects
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if (event.defaultPrevented) {
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return;
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}
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if (!this.focusOnClick) {
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return;
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}
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this.focus();
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}
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_windowResize(event) {
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// If the window resized then our screen element might have
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// as well. Update the viewport dimensions.
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window.requestAnimationFrame(() => {
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this._updateClip();
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this._updateScale();
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});
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if (this._resizeSession) {
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// Request changing the resolution of the remote display to
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// the size of the local browser viewport.
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// In order to not send multiple requests before the browser-resize
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// is finished we wait 0.5 seconds before sending the request.
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clearTimeout(this._resizeTimeout);
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this._resizeTimeout = setTimeout(this._requestRemoteResize.bind(this), 500);
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}
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}
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// Update state of clipping in Display object, and make sure the
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// configured viewport matches the current screen size
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_updateClip() {
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const cur_clip = this._display.clipViewport;
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let new_clip = this._clipViewport;
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if (this._scaleViewport) {
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// Disable viewport clipping if we are scaling
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new_clip = false;
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}
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if (cur_clip !== new_clip) {
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this._display.clipViewport = new_clip;
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}
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if (new_clip) {
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// When clipping is enabled, the screen is limited to
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// the size of the container.
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const size = this._screenSize();
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this._display.viewportChangeSize(size.w, size.h);
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this._fixScrollbars();
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}
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}
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_updateScale() {
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if (!this._scaleViewport) {
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this._display.scale = 1.0;
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} else {
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const size = this._screenSize();
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this._display.autoscale(size.w, size.h);
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}
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this._fixScrollbars();
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}
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|
|
// 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._screen_id, this._screen_flags);
|
|
|
|
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._rfb_connection_state;
|
|
|
|
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._rfb_connection_state = 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._rfb_clean_disconnect } }));
|
|
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._rfb_connection_state) {
|
|
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._rfb_clean_disconnect = 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 } }));
|
|
}
|
|
|
|
_handle_message() {
|
|
if (this._sock.rQlen === 0) {
|
|
Log.Warn("handle_message called on an empty receive queue");
|
|
return;
|
|
}
|
|
|
|
switch (this._rfb_connection_state) {
|
|
case 'disconnected':
|
|
Log.Error("Got data while disconnected");
|
|
break;
|
|
case 'connected':
|
|
while (true) {
|
|
if (this._flushing) {
|
|
break;
|
|
}
|
|
if (!this._normal_msg()) {
|
|
break;
|
|
}
|
|
if (this._sock.rQlen === 0) {
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
this._init_msg();
|
|
break;
|
|
}
|
|
}
|
|
|
|
_handleKeyEvent(keysym, code, down) {
|
|
this.sendKey(keysym, code, down);
|
|
}
|
|
|
|
_handleMouseButton(x, y, down, bmask) {
|
|
if (down) {
|
|
this._mouse_buttonMask |= bmask;
|
|
} else {
|
|
this._mouse_buttonMask &= ~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.
|
|
RFB.messages.pointerEvent(this._sock,
|
|
this._display.absX(x),
|
|
this._display.absY(y),
|
|
bmask);
|
|
}
|
|
}
|
|
|
|
if (this._viewOnly) { return; } // View only, skip mouse events
|
|
|
|
if (this._rfb_connection_state !== 'connected') { return; }
|
|
RFB.messages.pointerEvent(this._sock, this._display.absX(x), this._display.absY(y), this._mouse_buttonMask);
|
|
}
|
|
|
|
_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;
|
|
}
|
|
|
|
if (this._viewOnly) { return; } // View only, skip mouse events
|
|
|
|
if (this._rfb_connection_state !== 'connected') { return; }
|
|
RFB.messages.pointerEvent(this._sock, this._display.absX(x), this._display.absY(y), this._mouse_buttonMask);
|
|
}
|
|
|
|
// Message Handlers
|
|
|
|
_negotiate_protocol_version() {
|
|
if (this._sock.rQwait("version", 12)) {
|
|
return false;
|
|
}
|
|
|
|
const sversion = this._sock.rQshiftStr(12).substr(4, 7);
|
|
Log.Info("Server ProtocolVersion: " + sversion);
|
|
let is_repeater = 0;
|
|
switch (sversion) {
|
|
case "000.000": // UltraVNC repeater
|
|
is_repeater = 1;
|
|
break;
|
|
case "003.003":
|
|
case "003.006": // UltraVNC
|
|
case "003.889": // Apple Remote Desktop
|
|
this._rfb_version = 3.3;
|
|
break;
|
|
case "003.007":
|
|
this._rfb_version = 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._rfb_version = 3.8;
|
|
break;
|
|
default:
|
|
return this._fail("Invalid server version " + sversion);
|
|
}
|
|
|
|
if (is_repeater) {
|
|
let repeaterID = "ID:" + this._repeaterID;
|
|
while (repeaterID.length < 250) {
|
|
repeaterID += "\0";
|
|
}
|
|
this._sock.send_string(repeaterID);
|
|
return true;
|
|
}
|
|
|
|
if (this._rfb_version > this._rfb_max_version) {
|
|
this._rfb_version = this._rfb_max_version;
|
|
}
|
|
|
|
const cversion = "00" + parseInt(this._rfb_version, 10) +
|
|
".00" + ((this._rfb_version * 10) % 10);
|
|
this._sock.send_string("RFB " + cversion + "\n");
|
|
Log.Debug('Sent ProtocolVersion: ' + cversion);
|
|
|
|
this._rfb_init_state = 'Security';
|
|
}
|
|
|
|
_negotiate_security() {
|
|
// Polyfill since IE and PhantomJS doesn't have
|
|
// TypedArray.includes()
|
|
function includes(item, array) {
|
|
for (let i = 0; i < array.length; i++) {
|
|
if (array[i] === item) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (this._rfb_version >= 3.7) {
|
|
// Server sends supported list, client decides
|
|
const num_types = this._sock.rQshift8();
|
|
if (this._sock.rQwait("security type", num_types, 1)) { return false; }
|
|
|
|
if (num_types === 0) {
|
|
this._rfb_init_state = "SecurityReason";
|
|
this._security_context = "no security types";
|
|
this._security_status = 1;
|
|
return this._init_msg();
|
|
}
|
|
|
|
const types = this._sock.rQshiftBytes(num_types);
|
|
Log.Debug("Server security types: " + types);
|
|
|
|
// Look for each auth in preferred order
|
|
if (includes(1, types)) {
|
|
this._rfb_auth_scheme = 1; // None
|
|
} else if (includes(22, types)) {
|
|
this._rfb_auth_scheme = 22; // XVP
|
|
} else if (includes(16, types)) {
|
|
this._rfb_auth_scheme = 16; // Tight
|
|
} else if (includes(2, types)) {
|
|
this._rfb_auth_scheme = 2; // VNC Auth
|
|
} else {
|
|
return this._fail("Unsupported security types (types: " + types + ")");
|
|
}
|
|
|
|
this._sock.send([this._rfb_auth_scheme]);
|
|
} else {
|
|
// Server decides
|
|
if (this._sock.rQwait("security scheme", 4)) { return false; }
|
|
this._rfb_auth_scheme = this._sock.rQshift32();
|
|
|
|
if (this._rfb_auth_scheme == 0) {
|
|
this._rfb_init_state = "SecurityReason";
|
|
this._security_context = "authentication scheme";
|
|
this._security_status = 1;
|
|
return this._init_msg();
|
|
}
|
|
}
|
|
|
|
this._rfb_init_state = 'Authentication';
|
|
Log.Debug('Authenticating using scheme: ' + this._rfb_auth_scheme);
|
|
|
|
return this._init_msg(); // jump to authentication
|
|
}
|
|
|
|
_handle_security_reason() {
|
|
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._security_status,
|
|
reason: reason } }));
|
|
|
|
return this._fail("Security negotiation failed on " +
|
|
this._security_context +
|
|
" (reason: " + reason + ")");
|
|
} else {
|
|
this.dispatchEvent(new CustomEvent(
|
|
"securityfailure",
|
|
{ detail: { status: this._security_status } }));
|
|
|
|
return this._fail("Security negotiation failed on " +
|
|
this._security_context);
|
|
}
|
|
}
|
|
|
|
// authentication
|
|
_negotiate_xvp_auth() {
|
|
if (!this._rfb_credentials.username ||
|
|
!this._rfb_credentials.password ||
|
|
!this._rfb_credentials.target) {
|
|
this.dispatchEvent(new CustomEvent(
|
|
"credentialsrequired",
|
|
{ detail: { types: ["username", "password", "target"] } }));
|
|
return false;
|
|
}
|
|
|
|
const xvp_auth_str = String.fromCharCode(this._rfb_credentials.username.length) +
|
|
String.fromCharCode(this._rfb_credentials.target.length) +
|
|
this._rfb_credentials.username +
|
|
this._rfb_credentials.target;
|
|
this._sock.send_string(xvp_auth_str);
|
|
this._rfb_auth_scheme = 2;
|
|
return this._negotiate_authentication();
|
|
}
|
|
|
|
_negotiate_std_vnc_auth() {
|
|
if (this._sock.rQwait("auth challenge", 16)) { return false; }
|
|
|
|
if (!this._rfb_credentials.password) {
|
|
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._rfb_credentials.password, challenge);
|
|
this._sock.send(response);
|
|
this._rfb_init_state = "SecurityResult";
|
|
return true;
|
|
}
|
|
|
|
_negotiate_tight_tunnels(numTunnels) {
|
|
const clientSupportedTunnelTypes = {
|
|
0: { vendor: 'TGHT', signature: 'NOTUNNEL' }
|
|
};
|
|
const serverSupportedTunnelTypes = {};
|
|
// receive tunnel capabilities
|
|
for (let i = 0; i < numTunnels; i++) {
|
|
const cap_code = this._sock.rQshift32();
|
|
const cap_vendor = this._sock.rQshiftStr(4);
|
|
const cap_signature = this._sock.rQshiftStr(8);
|
|
serverSupportedTunnelTypes[cap_code] = { vendor: cap_vendor, signature: cap_signature };
|
|
}
|
|
|
|
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");
|
|
}
|
|
}
|
|
|
|
_negotiate_tight_auth() {
|
|
if (!this._rfb_tightvnc) { // 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._rfb_tightvnc = true;
|
|
|
|
if (numTunnels > 0) {
|
|
this._negotiate_tight_tunnels(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._rfb_init_state = 'SecurityResult';
|
|
return true;
|
|
}
|
|
|
|
if (this._sock.rQwait("sub auth capabilities", 16 * subAuthCount, 4)) { return false; }
|
|
|
|
const clientSupportedTypes = {
|
|
'STDVNOAUTH__': 1,
|
|
'STDVVNCAUTH_': 2
|
|
};
|
|
|
|
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._rfb_init_state = 'SecurityResult';
|
|
return true;
|
|
case 'STDVVNCAUTH_': // VNC auth
|
|
this._rfb_auth_scheme = 2;
|
|
return this._init_msg();
|
|
default:
|
|
return this._fail("Unsupported tiny auth scheme " +
|
|
"(scheme: " + authType + ")");
|
|
}
|
|
}
|
|
}
|
|
|
|
return this._fail("No supported sub-auth types!");
|
|
}
|
|
|
|
_negotiate_authentication() {
|
|
switch (this._rfb_auth_scheme) {
|
|
case 1: // no auth
|
|
if (this._rfb_version >= 3.8) {
|
|
this._rfb_init_state = 'SecurityResult';
|
|
return true;
|
|
}
|
|
this._rfb_init_state = 'ClientInitialisation';
|
|
return this._init_msg();
|
|
|
|
case 22: // XVP auth
|
|
return this._negotiate_xvp_auth();
|
|
|
|
case 2: // VNC authentication
|
|
return this._negotiate_std_vnc_auth();
|
|
|
|
case 16: // TightVNC Security Type
|
|
return this._negotiate_tight_auth();
|
|
|
|
default:
|
|
return this._fail("Unsupported auth scheme (scheme: " +
|
|
this._rfb_auth_scheme + ")");
|
|
}
|
|
}
|
|
|
|
_handle_security_result() {
|
|
if (this._sock.rQwait('VNC auth response ', 4)) { return false; }
|
|
|
|
const status = this._sock.rQshift32();
|
|
|
|
if (status === 0) { // OK
|
|
this._rfb_init_state = 'ClientInitialisation';
|
|
Log.Debug('Authentication OK');
|
|
return this._init_msg();
|
|
} else {
|
|
if (this._rfb_version >= 3.8) {
|
|
this._rfb_init_state = "SecurityReason";
|
|
this._security_context = "security result";
|
|
this._security_status = status;
|
|
return this._init_msg();
|
|
} else {
|
|
this.dispatchEvent(new CustomEvent(
|
|
"securityfailure",
|
|
{ detail: { status: status } }));
|
|
|
|
return this._fail("Security handshake failed");
|
|
}
|
|
}
|
|
}
|
|
|
|
_negotiate_server_init() {
|
|
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 big_endian = this._sock.rQshift8();
|
|
const true_color = this._sock.rQshift8();
|
|
|
|
const red_max = this._sock.rQshift16();
|
|
const green_max = this._sock.rQshift16();
|
|
const blue_max = this._sock.rQshift16();
|
|
const red_shift = this._sock.rQshift8();
|
|
const green_shift = this._sock.rQshift8();
|
|
const blue_shift = 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 name_length = this._sock.rQshift32();
|
|
if (this._sock.rQwait('server init name', name_length, 24)) { return false; }
|
|
this._fb_name = decodeUTF8(this._sock.rQshiftStr(name_length));
|
|
|
|
if (this._rfb_tightvnc) {
|
|
if (this._sock.rQwait('TightVNC extended server init header', 8, 24 + name_length)) { 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 + name_length)) { 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 +
|
|
", big_endian: " + big_endian +
|
|
", true_color: " + true_color +
|
|
", red_max: " + red_max +
|
|
", green_max: " + green_max +
|
|
", blue_max: " + blue_max +
|
|
", red_shift: " + red_shift +
|
|
", green_shift: " + green_shift +
|
|
", blue_shift: " + blue_shift);
|
|
|
|
if (big_endian !== 0) {
|
|
Log.Warn("Server native endian is not little endian");
|
|
}
|
|
|
|
if (red_shift !== 16) {
|
|
Log.Warn("Server native red-shift is not 16");
|
|
}
|
|
|
|
if (blue_shift !== 0) {
|
|
Log.Warn("Server native blue-shift is not 0");
|
|
}
|
|
|
|
// we're past the point where we could backtrack, so it's safe to call this
|
|
this.dispatchEvent(new CustomEvent(
|
|
"desktopname",
|
|
{ detail: { name: this._fb_name } }));
|
|
|
|
this._resize(width, height);
|
|
|
|
if (!this._viewOnly) { this._keyboard.grab(); }
|
|
if (!this._viewOnly) { this._mouse.grab(); }
|
|
|
|
this._fb_depth = 24;
|
|
|
|
if (this._fb_name === "Intel(r) AMT KVM") {
|
|
Log.Warn("Intel AMT KVM only supports 8/16 bit depths. Using low color mode.");
|
|
this._fb_depth = 8;
|
|
}
|
|
|
|
RFB.messages.pixelFormat(this._sock, this._fb_depth, true);
|
|
this._sendEncodings();
|
|
RFB.messages.fbUpdateRequest(this._sock, false, 0, 0, this._fb_width, this._fb_height);
|
|
|
|
this._updateConnectionState('connected');
|
|
return true;
|
|
}
|
|
|
|
_sendEncodings() {
|
|
const encs = [];
|
|
|
|
// In preference order
|
|
encs.push(encodings.encodingCopyRect);
|
|
// Only supported with full depth support
|
|
if (this._fb_depth == 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 + 6);
|
|
encs.push(encodings.pseudoEncodingCompressLevel0 + 2);
|
|
|
|
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);
|
|
|
|
if (this._fb_depth == 24) {
|
|
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
|
|
*/
|
|
_init_msg() {
|
|
switch (this._rfb_init_state) {
|
|
case 'ProtocolVersion':
|
|
return this._negotiate_protocol_version();
|
|
|
|
case 'Security':
|
|
return this._negotiate_security();
|
|
|
|
case 'Authentication':
|
|
return this._negotiate_authentication();
|
|
|
|
case 'SecurityResult':
|
|
return this._handle_security_result();
|
|
|
|
case 'SecurityReason':
|
|
return this._handle_security_reason();
|
|
|
|
case 'ClientInitialisation':
|
|
this._sock.send([this._shared ? 1 : 0]); // ClientInitialisation
|
|
this._rfb_init_state = 'ServerInitialisation';
|
|
return true;
|
|
|
|
case 'ServerInitialisation':
|
|
return this._negotiate_server_init();
|
|
|
|
default:
|
|
return this._fail("Unknown init state (state: " +
|
|
this._rfb_init_state + ")");
|
|
}
|
|
}
|
|
|
|
_handle_set_colour_map_msg() {
|
|
Log.Debug("SetColorMapEntries");
|
|
|
|
return this._fail("Unexpected SetColorMapEntries message");
|
|
}
|
|
|
|
_handle_server_cut_text() {
|
|
Log.Debug("ServerCutText");
|
|
|
|
if (this._sock.rQwait("ServerCutText header", 7, 1)) { return false; }
|
|
this._sock.rQskipBytes(3); // Padding
|
|
const length = this._sock.rQshift32();
|
|
if (this._sock.rQwait("ServerCutText", length, 8)) { return false; }
|
|
|
|
const text = this._sock.rQshiftStr(length);
|
|
|
|
if (this._viewOnly) { return true; }
|
|
|
|
this.dispatchEvent(new CustomEvent(
|
|
"clipboard",
|
|
{ detail: { text: text } }));
|
|
|
|
return true;
|
|
}
|
|
|
|
_handle_server_fence_msg() {
|
|
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;
|
|
}
|
|
|
|
_handle_xvp_msg() {
|
|
if (this._sock.rQwait("XVP version and message", 3, 1)) { return false; }
|
|
this._sock.rQskipBytes(1); // Padding
|
|
const xvp_ver = this._sock.rQshift8();
|
|
const xvp_msg = this._sock.rQshift8();
|
|
|
|
switch (xvp_msg) {
|
|
case 0: // XVP_FAIL
|
|
Log.Error("XVP Operation Failed");
|
|
break;
|
|
case 1: // XVP_INIT
|
|
this._rfb_xvp_ver = xvp_ver;
|
|
Log.Info("XVP extensions enabled (version " + this._rfb_xvp_ver + ")");
|
|
this._setCapability("power", true);
|
|
break;
|
|
default:
|
|
this._fail("Illegal server XVP message (msg: " + xvp_msg + ")");
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
_normal_msg() {
|
|
let msg_type;
|
|
if (this._FBU.rects > 0) {
|
|
msg_type = 0;
|
|
} else {
|
|
msg_type = this._sock.rQshift8();
|
|
}
|
|
|
|
let first, ret;
|
|
switch (msg_type) {
|
|
case 0: // FramebufferUpdate
|
|
ret = this._framebufferUpdate();
|
|
if (ret && !this._enabledContinuousUpdates) {
|
|
RFB.messages.fbUpdateRequest(this._sock, true, 0, 0,
|
|
this._fb_width, this._fb_height);
|
|
}
|
|
return ret;
|
|
|
|
case 1: // SetColorMapEntries
|
|
return this._handle_set_colour_map_msg();
|
|
|
|
case 2: // Bell
|
|
Log.Debug("Bell");
|
|
this.dispatchEvent(new CustomEvent(
|
|
"bell",
|
|
{ detail: {} }));
|
|
return true;
|
|
|
|
case 3: // ServerCutText
|
|
return this._handle_server_cut_text();
|
|
|
|
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._handle_server_fence_msg();
|
|
|
|
case 250: // XVP
|
|
return this._handle_xvp_msg();
|
|
|
|
default:
|
|
this._fail("Unexpected server message (type " + msg_type + ")");
|
|
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._handle_message();
|
|
}
|
|
}
|
|
|
|
_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.pseudoEncodingCursor:
|
|
return this._handleCursor();
|
|
|
|
case encodings.pseudoEncodingQEMUExtendedKeyEvent:
|
|
// Old Safari doesn't support creating keyboard events
|
|
try {
|
|
const keyboardEvent = document.createEvent("keyboardEvent");
|
|
if (keyboardEvent.code !== undefined) {
|
|
this._qemuExtKeyEventSupported = true;
|
|
}
|
|
} catch (err) {
|
|
// Do nothing
|
|
}
|
|
return true;
|
|
|
|
case encodings.pseudoEncodingDesktopSize:
|
|
this._resize(this._FBU.width, this._FBU.height);
|
|
return true;
|
|
|
|
case encodings.pseudoEncodingExtendedDesktopSize:
|
|
return this._handleExtendedDesktopSize();
|
|
|
|
default:
|
|
return this._handleDataRect();
|
|
}
|
|
}
|
|
|
|
_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 pix_idx = 0;
|
|
for (let y = 0; y < h; y++) {
|
|
for (let x = 0; x < w; x++) {
|
|
let mask_idx = y * Math.ceil(w / 8) + Math.floor(x / 8);
|
|
let alpha = (mask[mask_idx] << (x % 8)) & 0x80 ? 255 : 0;
|
|
rgba[pix_idx ] = pixels[pix_idx + 2];
|
|
rgba[pix_idx + 1] = pixels[pix_idx + 1];
|
|
rgba[pix_idx + 2] = pixels[pix_idx];
|
|
rgba[pix_idx + 3] = alpha;
|
|
pix_idx += 4;
|
|
}
|
|
}
|
|
|
|
this._updateCursor(rgba, hotx, hoty, w, h);
|
|
|
|
return true;
|
|
}
|
|
|
|
_handleExtendedDesktopSize() {
|
|
if (this._sock.rQwait("ExtendedDesktopSize", 4)) {
|
|
return false;
|
|
}
|
|
|
|
const number_of_screens = this._sock.rQpeek8();
|
|
|
|
let bytes = 4 + (number_of_screens * 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 < number_of_screens; i += 1) {
|
|
// Save the id and flags of the first screen
|
|
if (i === 0) {
|
|
this._screen_id = 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._screen_flags = 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._fb_depth);
|
|
} catch (err) {
|
|
this._fail("Error decoding rect: " + err);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
_updateContinuousUpdates() {
|
|
if (!this._enabledContinuousUpdates) { return; }
|
|
|
|
RFB.messages.enableContinuousUpdates(this._sock, true, 0, 0,
|
|
this._fb_width, this._fb_height);
|
|
}
|
|
|
|
_resize(width, height) {
|
|
this._fb_width = width;
|
|
this._fb_height = height;
|
|
|
|
this._display.resize(this._fb_width, this._fb_height);
|
|
|
|
// Adjust the visible viewport based on the new dimensions
|
|
this._updateClip();
|
|
this._updateScale();
|
|
|
|
this._updateContinuousUpdates();
|
|
}
|
|
|
|
_xvpOp(ver, op) {
|
|
if (this._rfb_xvp_ver < 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() {
|
|
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(xt_scancode) {
|
|
const upperByte = (keycode >> 8);
|
|
const lowerByte = (keycode & 0x00ff);
|
|
if (upperByte === 0xe0 && lowerByte < 0x7f) {
|
|
return lowerByte | 0x80;
|
|
}
|
|
return xt_scancode;
|
|
}
|
|
|
|
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();
|
|
},
|
|
|
|
// TODO(directxman12): make this unicode compatible?
|
|
clientCutText(sock, text) {
|
|
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 = text.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 text we begin creating the
|
|
// buffer for the flush in the next iteration.
|
|
let textOffset = 0;
|
|
|
|
let remaining = length;
|
|
while (remaining > 0) {
|
|
|
|
let flushSize = Math.min(remaining, (sock._sQbufferSize - sock._sQlen));
|
|
for (let i = 0; i < flushSize; i++) {
|
|
buff[sock._sQlen + i] = text.charCodeAt(textOffset + i);
|
|
}
|
|
|
|
sock._sQlen += flushSize;
|
|
sock.flush();
|
|
|
|
remaining -= flushSize;
|
|
textOffset += 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, true_color) {
|
|
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] = true_color ? 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 * 2; // red-shift
|
|
buff[offset + 15] = bits * 1; // green-shift
|
|
buff[offset + 16] = bits * 0; // 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,
|
|
}
|
|
};
|