diff -r 29e2e2e0b9ef -r f816cf5b6bcb image/www/core/rfb.js.orig --- a/image/www/core/rfb.js.orig Tue Oct 23 21:21:13 2018 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,2554 +0,0 @@ -/* - * noVNC: HTML5 VNC client - * Copyright (C) 2012 Joel Martin - * Copyright (C) 2017 Samuel Mannehed for Cendio AB - * Licensed under MPL 2.0 (see LICENSE.txt) - * - * See README.md for usage and integration instructions. - * - * TIGHT decoder portion: - * (c) 2012 Michael Tinglof, Joe Balaz, Les Piech (Mercuri.ca) - */ - -import * as Log from './util/logging.js'; -import { decodeUTF8 } from './util/strings.js'; -import { supportsCursorURIs, isTouchDevice } from './util/browser.js'; -import EventTargetMixin from './util/eventtarget.js'; -import Display from "./display.js"; -import Keyboard from "./input/keyboard.js"; -import Mouse from "./input/mouse.js"; -import Websock from "./websock.js"; -import DES from "./des.js"; -import KeyTable from "./input/keysym.js"; -import XtScancode from "./input/xtscancodes.js"; -import Inflator from "./inflator.js"; -import { encodings, encodingName } from "./encodings.js"; -import "./util/polyfill.js"; - -/*jslint white: false, browser: true */ -/*global window, Util, Display, Keyboard, Mouse, Websock, Websock_native, Base64, DES, KeyTable, Inflator, XtScancode */ - -// How many seconds to wait for a disconnect to finish -var DISCONNECT_TIMEOUT = 3; - -export default function RFB(target, url, options) { - if (!target) { - throw Error("Must specify target"); - } - if (!url) { - throw Error("Must specify URL"); - } - - this._target = target; - this._url = url; - - // Connection details - options = options || {}; - this._rfb_credentials = options.credentials || {}; - this._shared = 'shared' in options ? !!options.shared : true; - this._repeaterID = options.repeaterID || ''; - - // Internal state - this._rfb_connection_state = ''; - this._rfb_init_state = ''; - this._rfb_auth_scheme = ''; - this._rfb_clean_disconnect = true; - - // Server capabilities - this._rfb_version = 0; - this._rfb_max_version = 3.8; - this._rfb_tightvnc = false; - this._rfb_xvp_ver = 0; - - this._fb_width = 0; - this._fb_height = 0; - - this._fb_name = ""; - - this._capabilities = { power: false }; - - this._supportsFence = false; - - this._supportsContinuousUpdates = false; - this._enabledContinuousUpdates = false; - - this._supportsSetDesktopSize = false; - this._screen_id = 0; - this._screen_flags = 0; - - this._qemuExtKeyEventSupported = false; - - // Internal objects - this._sock = null; // Websock object - this._display = null; // Display object - this._flushing = false; // Display flushing state - this._keyboard = null; // Keyboard input handler object - this._mouse = null; // Mouse input handler object - - // Timers - this._disconnTimer = null; // disconnection timer - this._resizeTimeout = null; // resize rate limiting - - // Decoder states and stats - this._encHandlers = {}; - this._encStats = {}; - - this._FBU = { - rects: 0, - subrects: 0, // RRE and HEXTILE - lines: 0, // RAW - tiles: 0, // HEXTILE - bytes: 0, - x: 0, - y: 0, - width: 0, - height: 0, - encoding: 0, - subencoding: -1, - background: null, - zlibs: [] // TIGHT zlib streams - }; - for (var i = 0; i < 4; i++) { - this._FBU.zlibs[i] = new Inflator(); - } - - this._destBuff = null; - this._paletteBuff = new Uint8Array(1024); // 256 * 4 (max palette size * max bytes-per-pixel) - - this._rre_chunk_sz = 100; - - this._timing = { - last_fbu: 0, - fbu_total: 0, - fbu_total_cnt: 0, - full_fbu_total: 0, - full_fbu_cnt: 0, - - fbu_rt_start: 0, - fbu_rt_total: 0, - fbu_rt_cnt: 0, - pixels: 0 - }; - - // Mouse state - this._mouse_buttonMask = 0; - this._mouse_arr = []; - this._viewportDragging = false; - this._viewportDragPos = {}; - this._viewportHasMoved = false; - - // Bound event handlers - this._eventHandlers = { - focusCanvas: this._focusCanvas.bind(this), - windowResize: this._windowResize.bind(this), - }; - - // main setup - Log.Debug(">> RFB.constructor"); - - // Create DOM elements - this._screen = document.createElement('div'); - this._screen.style.display = 'flex'; - this._screen.style.width = '100%'; - this._screen.style.height = '100%'; - this._screen.style.overflow = 'auto'; - this._screen.style.backgroundColor = 'rgb(40, 40, 40)'; - this._canvas = document.createElement('canvas'); - this._canvas.style.margin = 'auto'; - // Some browsers add an outline on focus - this._canvas.style.outline = 'none'; - // IE miscalculates width without this :( - this._canvas.style.flexShrink = '0'; - this._canvas.width = 0; - this._canvas.height = 0; - this._canvas.tabIndex = -1; - this._screen.appendChild(this._canvas); - - // populate encHandlers with bound versions - this._encHandlers[encodings.encodingRaw] = RFB.encodingHandlers.RAW.bind(this); - this._encHandlers[encodings.encodingCopyRect] = RFB.encodingHandlers.COPYRECT.bind(this); - this._encHandlers[encodings.encodingRRE] = RFB.encodingHandlers.RRE.bind(this); - this._encHandlers[encodings.encodingHextile] = RFB.encodingHandlers.HEXTILE.bind(this); - this._encHandlers[encodings.encodingTight] = RFB.encodingHandlers.TIGHT.bind(this); - - this._encHandlers[encodings.pseudoEncodingDesktopSize] = RFB.encodingHandlers.DesktopSize.bind(this); - this._encHandlers[encodings.pseudoEncodingLastRect] = RFB.encodingHandlers.last_rect.bind(this); - this._encHandlers[encodings.pseudoEncodingCursor] = RFB.encodingHandlers.Cursor.bind(this); - this._encHandlers[encodings.pseudoEncodingQEMUExtendedKeyEvent] = RFB.encodingHandlers.QEMUExtendedKeyEvent.bind(this); - this._encHandlers[encodings.pseudoEncodingExtendedDesktopSize] = RFB.encodingHandlers.ExtendedDesktopSize.bind(this); - - // NB: nothing that needs explicit teardown should be done - // before this point, since this can throw an exception - try { - this._display = new Display(this._canvas); - } catch (exc) { - Log.Error("Display exception: " + exc); - throw exc; - } - this._display.onflush = this._onFlush.bind(this); - this._display.clear(); - - this._keyboard = new Keyboard(this._canvas); - this._keyboard.onkeyevent = this._handleKeyEvent.bind(this); - - this._mouse = new Mouse(this._canvas); - this._mouse.onmousebutton = this._handleMouseButton.bind(this); - this._mouse.onmousemove = this._handleMouseMove.bind(this); - - this._sock = new Websock(); - this._sock.on('message', this._handle_message.bind(this)); - this._sock.on('open', function () { - if ((this._rfb_connection_state === 'connecting') && - (this._rfb_init_state === '')) { - this._rfb_init_state = 'ProtocolVersion'; - Log.Debug("Starting VNC handshake"); - } else { - this._fail("Unexpected server connection while " + - this._rfb_connection_state); - } - }.bind(this)); - this._sock.on('close', function (e) { - Log.Debug("WebSocket on-close event"); - var msg = ""; - if (e.code) { - msg = "(code: " + e.code; - if (e.reason) { - msg += ", reason: " + e.reason; - } - msg += ")"; - } - switch (this._rfb_connection_state) { - 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'); - }.bind(this)); - this._sock.on('error', function (e) { - Log.Warn("WebSocket on-error event"); - }); - - // Slight delay of the actual connection so that the caller has - // time to set up callbacks - setTimeout(this._updateConnectionState.bind(this, 'connecting')); - - Log.Debug("<< RFB.constructor"); -}; - -RFB.prototype = { - // ===== PROPERTIES ===== - - dragViewport: false, - focusOnClick: true, - - _viewOnly: false, - get viewOnly() { return this._viewOnly; }, - set viewOnly(viewOnly) { - this._viewOnly = viewOnly; - - if (this._rfb_connection_state === "connecting" || - this._rfb_connection_state === "connected") { - if (viewOnly) { - this._keyboard.ungrab(); - this._mouse.ungrab(); - } else { - this._keyboard.grab(); - this._mouse.grab(); - } - } - }, - - get capabilities() { return this._capabilities; }, - - get touchButton() { return this._mouse.touchButton; }, - set touchButton(button) { this._mouse.touchButton = button; }, - - _clipViewport: false, - get clipViewport() { return this._clipViewport; }, - set clipViewport(viewport) { - this._clipViewport = viewport; - this._updateClip(); - }, - - _scaleViewport: false, - get scaleViewport() { return this._scaleViewport; }, - set scaleViewport(scale) { - this._scaleViewport = scale; - // Scaling trumps clipping, so we may need to adjust - // clipping when enabling or disabling scaling - if (scale && this._clipViewport) { - this._updateClip(); - } - this._updateScale(); - if (!scale && this._clipViewport) { - this._updateClip(); - } - }, - - _resizeSession: false, - get resizeSession() { return this._resizeSession; }, - set resizeSession(resize) { - this._resizeSession = resize; - if (resize) { - this._requestRemoteResize(); - } - }, - - // ===== PUBLIC METHODS ===== - - disconnect: function () { - this._updateConnectionState('disconnecting'); - this._sock.off('error'); - this._sock.off('message'); - this._sock.off('open'); - }, - - sendCredentials: function (creds) { - this._rfb_credentials = creds; - setTimeout(this._init_msg.bind(this), 0); - }, - - sendCtrlAltDel: function () { - if (this._rfb_connection_state !== 'connected' || this._viewOnly) { return; } - Log.Info("Sending Ctrl-Alt-Del"); - - this.sendKey(KeyTable.XK_Control_L, "ControlLeft", true); - this.sendKey(KeyTable.XK_Alt_L, "AltLeft", true); - this.sendKey(KeyTable.XK_Delete, "Delete", true); - this.sendKey(KeyTable.XK_Delete, "Delete", false); - this.sendKey(KeyTable.XK_Alt_L, "AltLeft", false); - this.sendKey(KeyTable.XK_Control_L, "ControlLeft", false); - }, - - machineShutdown: function () { - this._xvpOp(1, 2); - }, - - machineReboot: function () { - this._xvpOp(1, 3); - }, - - machineReset: function () { - this._xvpOp(1, 4); - }, - - // Send a key press. If 'down' is not specified then send a down key - // followed by an up key. - sendKey: function (keysym, code, down) { - if (this._rfb_connection_state !== 'connected' || this._viewOnly) { return; } - - if (down === undefined) { - this.sendKey(keysym, code, true); - this.sendKey(keysym, code, false); - return; - } - - var scancode = XtScancode[code]; - - if (this._qemuExtKeyEventSupported && scancode) { - // 0 is NoSymbol - keysym = keysym || 0; - - Log.Info("Sending key (" + (down ? "down" : "up") + "): keysym " + keysym + ", scancode " + scancode); - - RFB.messages.QEMUExtendedKeyEvent(this._sock, keysym, down, scancode); - } else { - if (!keysym) { - return; - } - Log.Info("Sending keysym (" + (down ? "down" : "up") + "): " + keysym); - RFB.messages.keyEvent(this._sock, keysym, down ? 1 : 0); - } - }, - - focus: function () { - this._canvas.focus(); - }, - - blur: function () { - this._canvas.blur(); - }, - - clipboardPasteFrom: function (text) { - if (this._rfb_connection_state !== 'connected' || this._viewOnly) { return; } - RFB.messages.clientCutText(this._sock, text); - }, - - // ===== PRIVATE METHODS ===== - - _connect: function () { - Log.Debug(">> RFB.connect"); - - Log.Info("connecting to " + this._url); - - try { - // WebSocket.onopen transitions to the RFB init states - this._sock.open(this._url, ['binary']); - } catch (e) { - if (e.name === 'SyntaxError') { - this._fail("Invalid host or port (" + e + ")"); - } else { - this._fail("Error when opening socket (" + e + ")"); - } - } - - // Make our elements part of the page - this._target.appendChild(this._screen); - - // Monitor size changes of the screen - // FIXME: Use ResizeObserver, or hidden overflow - window.addEventListener('resize', this._eventHandlers.windowResize); - - // Always grab focus on some kind of click event - this._canvas.addEventListener("mousedown", this._eventHandlers.focusCanvas); - this._canvas.addEventListener("touchstart", this._eventHandlers.focusCanvas); - - Log.Debug("<< RFB.connect"); - }, - - _disconnect: function () { - Log.Debug(">> RFB.disconnect"); - this._canvas.removeEventListener("mousedown", this._eventHandlers.focusCanvas); - this._canvas.removeEventListener("touchstart", this._eventHandlers.focusCanvas); - window.removeEventListener('resize', this._eventHandlers.windowResize); - this._keyboard.ungrab(); - this._mouse.ungrab(); - this._sock.close(); - this._print_stats(); - 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); - Log.Debug("<< RFB.disconnect"); - }, - - _print_stats: function () { - var stats = this._encStats; - - Log.Info("Encoding stats for this connection:"); - Object.keys(stats).forEach(function (key) { - var s = stats[key]; - if (s[0] + s[1] > 0) { - Log.Info(" " + encodingName(key) + ": " + s[0] + " rects"); - } - }); - - Log.Info("Encoding stats since page load:"); - Object.keys(stats).forEach(function (key) { - var s = stats[key]; - Log.Info(" " + encodingName(key) + ": " + s[1] + " rects"); - }); - }, - - _focusCanvas: function(event) { - // Respect earlier handlers' request to not do side-effects - if (event.defaultPrevented) { - return; - } - - if (!this.focusOnClick) { - return; - } - - this.focus(); - }, - - _windowResize: function (event) { - // If the window resized then our screen element might have - // as well. Update the viewport dimensions. - window.requestAnimationFrame(function () { - this._updateClip(); - this._updateScale(); - }.bind(this)); - - 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: function () { - var cur_clip = this._display.clipViewport; - var new_clip = this._clipViewport; - - if (this._scaleViewport) { - // Disable viewport clipping if we are scaling - new_clip = false; - } - - if (cur_clip !== new_clip) { - this._display.clipViewport = new_clip; - } - - if (new_clip) { - // When clipping is enabled, the screen is limited to - // the size of the container. - let size = this._screenSize(); - this._display.viewportChangeSize(size.w, size.h); - this._fixScrollbars(); - } - }, - - _updateScale: function () { - if (!this._scaleViewport) { - this._display.scale = 1.0; - } else { - let 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: function () { - clearTimeout(this._resizeTimeout); - this._resizeTimeout = null; - - if (!this._resizeSession || this._viewOnly || - !this._supportsSetDesktopSize) { - return; - } - - let size = this._screenSize(); - RFB.messages.setDesktopSize(this._sock, size.w, 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: function () { - return { w: this._screen.offsetWidth, - h: this._screen.offsetHeight }; - }, - - _fixScrollbars: function () { - // 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. - var 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: function (state) { - var 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; - - var smsg = "New state '" + state + "', was '" + oldstate + "'."; - Log.Debug(smsg); - - 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': - var event = new CustomEvent("connect", { detail: {} }); - this.dispatchEvent(event); - break; - - case 'disconnecting': - this._disconnect(); - - this._disconnTimer = setTimeout(function () { - Log.Error("Disconnection timed out."); - this._updateConnectionState('disconnected'); - }.bind(this), DISCONNECT_TIMEOUT * 1000); - break; - - case 'disconnected': - event = new CustomEvent( - "disconnect", { detail: - { clean: this._rfb_clean_disconnect } }); - this.dispatchEvent(event); - break; - } - }, - - /* Print errors and disconnect - * - * The parameter 'details' is used for information that - * should be logged but not sent to the user interface. - */ - _fail: function (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: function (cap, val) { - this._capabilities[cap] = val; - var event = new CustomEvent("capabilities", - { detail: { capabilities: this._capabilities } }); - this.dispatchEvent(event); - }, - - _handle_message: function () { - 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: function (keysym, code, down) { - this.sendKey(keysym, code, down); - }, - - _handleMouseButton: function (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: function (x, y) { - if (this._viewportDragging) { - var deltaX = this._viewportDragPos.x - x; - var deltaY = this._viewportDragPos.y - y; - - // The goal is to trigger on a certain physical width, the - // devicePixelRatio brings us a bit closer but is not optimal. - var dragThreshold = 10 * (window.devicePixelRatio || 1); - - 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: function () { - if (this._sock.rQlen() < 12) { - return this._fail("Received incomplete protocol version."); - } - - var sversion = this._sock.rQshiftStr(12).substr(4, 7); - Log.Info("Server ProtocolVersion: " + sversion); - var 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) { - var 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; - } - - var 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: function () { - // Polyfill since IE and PhantomJS doesn't have - // TypedArray.includes() - function includes(item, array) { - for (var 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 - var num_types = this._sock.rQshift8(); - if (this._sock.rQwait("security type", num_types, 1)) { return false; } - - if (num_types === 0) { - return this._handle_security_failure("no security types"); - } - - var types = this._sock.rQshiftBytes(num_types); - Log.Debug("Server security types: " + types); - - // Look for each auth in preferred order - this._rfb_auth_scheme = 0; - 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(); - } - - this._rfb_init_state = 'Authentication'; - Log.Debug('Authenticating using scheme: ' + this._rfb_auth_scheme); - - return this._init_msg(); // jump to authentication - }, - - /* - * Get the security failure reason if sent from the server and - * send the 'securityfailure' event. - * - * - The optional parameter context can be used to add some extra - * context to the log output. - * - * - The optional parameter security_result_status can be used to - * add a custom status code to the event. - */ - _handle_security_failure: function (context, security_result_status) { - - if (typeof context === 'undefined') { - context = ""; - } else { - context = " on " + context; - } - - if (typeof security_result_status === 'undefined') { - security_result_status = 1; // fail - } - - if (this._sock.rQwait("reason length", 4)) { - return false; - } - let strlen = this._sock.rQshift32(); - let reason = ""; - - if (strlen > 0) { - if (this._sock.rQwait("reason", strlen, 8)) { return false; } - reason = this._sock.rQshiftStr(strlen); - } - - if (reason !== "") { - - let event = new CustomEvent( - "securityfailure", - { detail: { status: security_result_status, reason: reason } }); - this.dispatchEvent(event); - - return this._fail("Security negotiation failed" + context + - " (reason: " + reason + ")"); - } else { - - let event = new CustomEvent( - "securityfailure", - { detail: { status: security_result_status } }); - this.dispatchEvent(event); - - return this._fail("Security negotiation failed" + context); - } - }, - - // authentication - _negotiate_xvp_auth: function () { - if (!this._rfb_credentials.username || - !this._rfb_credentials.password || - !this._rfb_credentials.target) { - var event = new CustomEvent("credentialsrequired", - { detail: { types: ["username", "password", "target"] } }); - this.dispatchEvent(event); - return false; - } - - var 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: function () { - if (this._sock.rQwait("auth challenge", 16)) { return false; } - - if (!this._rfb_credentials.password) { - var event = new CustomEvent("credentialsrequired", - { detail: { types: ["password"] } }); - this.dispatchEvent(event); - return false; - } - - // TODO(directxman12): make genDES not require an Array - var challenge = Array.prototype.slice.call(this._sock.rQshiftBytes(16)); - var response = RFB.genDES(this._rfb_credentials.password, challenge); - this._sock.send(response); - this._rfb_init_state = "SecurityResult"; - return true; - }, - - _negotiate_tight_tunnels: function (numTunnels) { - var clientSupportedTunnelTypes = { - 0: { vendor: 'TGHT', signature: 'NOTUNNEL' } - }; - var serverSupportedTunnelTypes = {}; - // receive tunnel capabilities - for (var i = 0; i < numTunnels; i++) { - var cap_code = this._sock.rQshift32(); - var cap_vendor = this._sock.rQshiftStr(4); - var cap_signature = this._sock.rQshiftStr(8); - serverSupportedTunnelTypes[cap_code] = { vendor: cap_vendor, signature: cap_signature }; - } - - // 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"); - } - 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: function () { - if (!this._rfb_tightvnc) { // first pass, do the tunnel negotiation - if (this._sock.rQwait("num tunnels", 4)) { return false; } - var 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; } - var 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; } - - var clientSupportedTypes = { - 'STDVNOAUTH__': 1, - 'STDVVNCAUTH_': 2 - }; - - var serverSupportedTypes = []; - - for (var i = 0; i < subAuthCount; i++) { - var capNum = this._sock.rQshift32(); - var capabilities = this._sock.rQshiftStr(12); - serverSupportedTypes.push(capabilities); - } - - for (var authType in clientSupportedTypes) { - if (serverSupportedTypes.indexOf(authType) != -1) { - this._sock.send([0, 0, 0, clientSupportedTypes[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: function () { - switch (this._rfb_auth_scheme) { - case 0: // connection failed - return this._handle_security_failure("authentication 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: function () { - if (this._sock.rQwait('VNC auth response ', 4)) { return false; } - - let 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) { - return this._handle_security_failure("security result", status); - } else { - let event = new CustomEvent("securityfailure", - { detail: { status: status } }); - this.dispatchEvent(event); - - return this._fail("Security handshake failed"); - } - } - }, - - _negotiate_server_init: function () { - if (this._sock.rQwait("server initialization", 24)) { return false; } - - /* Screen size */ - var width = this._sock.rQshift16(); - var height = this._sock.rQshift16(); - - /* PIXEL_FORMAT */ - var bpp = this._sock.rQshift8(); - var depth = this._sock.rQshift8(); - var big_endian = this._sock.rQshift8(); - var true_color = this._sock.rQshift8(); - - var red_max = this._sock.rQshift16(); - var green_max = this._sock.rQshift16(); - var blue_max = this._sock.rQshift16(); - var red_shift = this._sock.rQshift8(); - var green_shift = this._sock.rQshift8(); - var 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 */ - var 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 - var numServerMessages = this._sock.rQshift16(); - var numClientMessages = this._sock.rQshift16(); - var numEncodings = this._sock.rQshift16(); - this._sock.rQskipBytes(2); // padding - - var 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 - var event = new CustomEvent("desktopname", - { detail: { name: this._fb_name } }); - this.dispatchEvent(event); - - 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; - } else if (this._fb_name === "MBSE BrewBoard") { - Log.Warn("MBSE BrewBoard only supports 8 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._timing.fbu_rt_start = (new Date()).getTime(); - this._timing.pixels = 0; - - // Cursor will be server side until the server decides to honor - // our request and send over the cursor image - this._display.disableLocalCursor(); - - this._updateConnectionState('connected'); - return true; - }, - - _sendEncodings: function () { - var 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.encodingHextile); - encs.push(encodings.encodingRRE); - } - encs.push(encodings.encodingRaw); - - // Psuedo-encoding settings - encs.push(encodings.pseudoEncodingTightPNG); - 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 (supportsCursorURIs() && - !isTouchDevice && 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: function () { - 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 '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: function () { - Log.Debug("SetColorMapEntries"); - - return this._fail("Unexpected SetColorMapEntries message"); - }, - - _handle_server_cut_text: function () { - Log.Debug("ServerCutText"); - - if (this._sock.rQwait("ServerCutText header", 7, 1)) { return false; } - this._sock.rQskipBytes(3); // Padding - var length = this._sock.rQshift32(); - if (this._sock.rQwait("ServerCutText", length, 8)) { return false; } - - var text = this._sock.rQshiftStr(length); - - if (this._viewOnly) { return true; } - - var event = new CustomEvent("clipboard", - { detail: { text: text } }); - this.dispatchEvent(event); - - return true; - }, - - _handle_server_fence_msg: function() { - if (this._sock.rQwait("ServerFence header", 8, 1)) { return false; } - this._sock.rQskipBytes(3); // Padding - var flags = this._sock.rQshift32(); - var 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; - } - - var 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: function () { - if (this._sock.rQwait("XVP version and message", 3, 1)) { return false; } - this._sock.rQskip8(); // Padding - var xvp_ver = this._sock.rQshift8(); - var 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: function () { - var msg_type; - - if (this._FBU.rects > 0) { - msg_type = 0; - } else { - msg_type = this._sock.rQshift8(); - } - - switch (msg_type) { - case 0: // FramebufferUpdate - var 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"); - var event = new CustomEvent("bell", { detail: {} }); - this.dispatchEvent(event); - return true; - - case 3: // ServerCutText - return this._handle_server_cut_text(); - - case 150: // EndOfContinuousUpdates - var 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: function() { - this._flushing = false; - // Resume processing - if (this._sock.rQlen() > 0) { - this._handle_message(); - } - }, - - _framebufferUpdate: function () { - var ret = true; - var now; - - if (this._FBU.rects === 0) { - if (this._sock.rQwait("FBU header", 3, 1)) { return false; } - this._sock.rQskip8(); // Padding - this._FBU.rects = this._sock.rQshift16(); - this._FBU.bytes = 0; - this._timing.cur_fbu = 0; - if (this._timing.fbu_rt_start > 0) { - now = (new Date()).getTime(); - Log.Info("First FBU latency: " + (now - this._timing.fbu_rt_start)); - } - - // 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._rfb_connection_state !== 'connected') { return false; } - - if (this._sock.rQwait("FBU", this._FBU.bytes)) { return false; } - if (this._FBU.bytes === 0) { - if (this._sock.rQwait("rect header", 12)) { return false; } - /* New FramebufferUpdate */ - - var 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._encHandlers[this._FBU.encoding]) { - this._fail("Unsupported encoding (encoding: " + - this._FBU.encoding + ")"); - return false; - } - } - - this._timing.last_fbu = (new Date()).getTime(); - - ret = this._encHandlers[this._FBU.encoding](); - - now = (new Date()).getTime(); - this._timing.cur_fbu += (now - this._timing.last_fbu); - - if (ret) { - if (!(this._FBU.encoding in this._encStats)) { - this._encStats[this._FBU.encoding] = [0, 0]; - } - this._encStats[this._FBU.encoding][0]++; - this._encStats[this._FBU.encoding][1]++; - this._timing.pixels += this._FBU.width * this._FBU.height; - } - - if (this._timing.pixels >= (this._fb_width * this._fb_height)) { - if ((this._FBU.width === this._fb_width && this._FBU.height === this._fb_height) || - this._timing.fbu_rt_start > 0) { - this._timing.full_fbu_total += this._timing.cur_fbu; - this._timing.full_fbu_cnt++; - Log.Info("Timing of full FBU, curr: " + - this._timing.cur_fbu + ", total: " + - this._timing.full_fbu_total + ", cnt: " + - this._timing.full_fbu_cnt + ", avg: " + - (this._timing.full_fbu_total / this._timing.full_fbu_cnt)); - } - - if (this._timing.fbu_rt_start > 0) { - var fbu_rt_diff = now - this._timing.fbu_rt_start; - this._timing.fbu_rt_total += fbu_rt_diff; - this._timing.fbu_rt_cnt++; - Log.Info("full FBU round-trip, cur: " + - fbu_rt_diff + ", total: " + - this._timing.fbu_rt_total + ", cnt: " + - this._timing.fbu_rt_cnt + ", avg: " + - (this._timing.fbu_rt_total / this._timing.fbu_rt_cnt)); - this._timing.fbu_rt_start = 0; - } - } - - if (!ret) { return ret; } // need more data - } - - this._display.flip(); - - return true; // We finished this FBU - }, - - _updateContinuousUpdates: function() { - if (!this._enabledContinuousUpdates) { return; } - - RFB.messages.enableContinuousUpdates(this._sock, true, 0, 0, - this._fb_width, this._fb_height); - }, - - _resize: function(width, height) { - this._fb_width = width; - this._fb_height = height; - - this._destBuff = new Uint8Array(this._fb_width * this._fb_height * 4); - - this._display.resize(this._fb_width, this._fb_height); - - // Adjust the visible viewport based on the new dimensions - this._updateClip(); - this._updateScale(); - - this._timing.fbu_rt_start = (new Date()).getTime(); - this._updateContinuousUpdates(); - }, - - _xvpOp: function (ver, op) { - if (this._rfb_xvp_ver < ver) { return; } - Log.Info("Sending XVP operation " + op + " (version " + ver + ")"); - RFB.messages.xvpOp(this._sock, ver, op); - }, -}; - -Object.assign(RFB.prototype, EventTargetMixin); - -// Class Methods -RFB.messages = { - keyEvent: function (sock, keysym, down) { - var buff = sock._sQ; - var 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: function (sock, keysym, down, keycode) { - function getRFBkeycode(xt_scancode) { - var upperByte = (keycode >> 8); - var lowerByte = (keycode & 0x00ff); - if (upperByte === 0xe0 && lowerByte < 0x7f) { - lowerByte = lowerByte | 0x80; - return lowerByte; - } - return xt_scancode; - } - - var buff = sock._sQ; - var 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; - - var 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: function (sock, x, y, mask) { - var buff = sock._sQ; - var 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: function (sock, text) { - var buff = sock._sQ; - var offset = sock._sQlen; - - buff[offset] = 6; // msg-type - - buff[offset + 1] = 0; // padding - buff[offset + 2] = 0; // padding - buff[offset + 3] = 0; // padding - - var n = text.length; - - buff[offset + 4] = n >> 24; - buff[offset + 5] = n >> 16; - buff[offset + 6] = n >> 8; - buff[offset + 7] = n; - - for (var i = 0; i < n; i++) { - buff[offset + 8 + i] = text.charCodeAt(i); - } - - sock._sQlen += 8 + n; - sock.flush(); - }, - - setDesktopSize: function (sock, width, height, id, flags) { - var buff = sock._sQ; - var 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: function (sock, flags, payload) { - var buff = sock._sQ; - var 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; - - var n = payload.length; - - buff[offset + 8] = n; // length - - for (var i = 0; i < n; i++) { - buff[offset + 9 + i] = payload.charCodeAt(i); - } - - sock._sQlen += 9 + n; - sock.flush(); - }, - - enableContinuousUpdates: function (sock, enable, x, y, width, height) { - var buff = sock._sQ; - var 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: function (sock, depth, true_color) { - var buff = sock._sQ; - var offset = sock._sQlen; - - var bpp, bits; - - if (depth > 16) { - bpp = 32; - } else if (depth > 8) { - bpp = 16; - } else { - bpp = 8; - } - - 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 + 10] = 0; // green-max - buff[offset + 12] = 0; // blue-max - - if (depth == 8) { - buff[offset + 9] = 7; // red-max - buff[offset + 11] = 7; // green-max - buff[offset + 13] = 3; // blue-max - buff[offset + 14] = 5; // red-shift - buff[offset + 15] = 2; // green-shift - buff[offset + 16] = 0; // blue-shift - } else { - buff[offset + 9] = (1 << bits) - 1; // red-max - buff[offset + 11] = (1 << bits) - 1; // green-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: function (sock, encodings) { - var buff = sock._sQ; - var offset = sock._sQlen; - - buff[offset] = 2; // msg-type - buff[offset + 1] = 0; // padding - - buff[offset + 2] = encodings.length >> 8; - buff[offset + 3] = encodings.length; - - var i, j = offset + 4; - for (i = 0; i < encodings.length; i++) { - var 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: function (sock, incremental, x, y, w, h) { - var buff = sock._sQ; - var 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: function (sock, ver, op) { - var buff = sock._sQ; - var 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.genDES = function (password, challenge) { - var passwd = []; - for (var i = 0; i < password.length; i++) { - passwd.push(password.charCodeAt(i)); - } - return (new DES(passwd)).encrypt(challenge); -}; - -RFB.encodingHandlers = { - RAW: function () { - if (this._FBU.lines === 0) { - this._FBU.lines = this._FBU.height; - } - - var pixelSize = this._fb_depth == 8 ? 1 : 4; - this._FBU.bytes = this._FBU.width * pixelSize; // at least a line - if (this._sock.rQwait("RAW", this._FBU.bytes)) { return false; } - var cur_y = this._FBU.y + (this._FBU.height - this._FBU.lines); - var curr_height = Math.min(this._FBU.lines, - Math.floor(this._sock.rQlen() / (this._FBU.width * pixelSize))); - var data = this._sock.get_rQ(); - var index = this._sock.get_rQi(); - if (this._fb_depth == 8) { - var pixels = this._FBU.width * curr_height - var newdata = new Uint8Array(pixels * 4); - var i; - for (i = 0;i < pixels;i++) { - //newdata[i * 4 + 0] = ((data[index + i] >> 0) & 0x3) * 255 / 3; - //newdata[i * 4 + 1] = ((data[index + i] >> 2) & 0x3) * 255 / 3; - //newdata[i * 4 + 2] = ((data[index + i] >> 4) & 0x3) * 255 / 3; - // Convert 8 bit RGB332 color to internal RGB888. - newdata[i * 4 + 0] = ((data[index + i] >> 0) & 0x3) * 255 / 3; // blue - newdata[i * 4 + 1] = ((data[index + i] >> 2) & 0x7) * 255 / 7; // green - newdata[i * 4 + 2] = ((data[index + i] >> 5) & 0x7) * 255 / 7; // red - newdata[i * 4 + 4] = 0; - } - data = newdata; - index = 0; - } - this._display.blitImage(this._FBU.x, cur_y, this._FBU.width, - curr_height, data, index); - this._sock.rQskipBytes(this._FBU.width * curr_height * pixelSize); - this._FBU.lines -= curr_height; - - if (this._FBU.lines > 0) { - this._FBU.bytes = this._FBU.width * pixelSize; // At least another line - } else { - this._FBU.rects--; - this._FBU.bytes = 0; - } - - return true; - }, - - COPYRECT: function () { - this._FBU.bytes = 4; - if (this._sock.rQwait("COPYRECT", 4)) { return false; } - this._display.copyImage(this._sock.rQshift16(), this._sock.rQshift16(), - this._FBU.x, this._FBU.y, this._FBU.width, - this._FBU.height); - - this._FBU.rects--; - this._FBU.bytes = 0; - return true; - }, - - RRE: function () { - var color; - if (this._FBU.subrects === 0) { - this._FBU.bytes = 4 + 4; - if (this._sock.rQwait("RRE", 4 + 4)) { return false; } - this._FBU.subrects = this._sock.rQshift32(); - color = this._sock.rQshiftBytes(4); // Background - this._display.fillRect(this._FBU.x, this._FBU.y, this._FBU.width, this._FBU.height, color); - } - - while (this._FBU.subrects > 0 && this._sock.rQlen() >= (4 + 8)) { - color = this._sock.rQshiftBytes(4); - var x = this._sock.rQshift16(); - var y = this._sock.rQshift16(); - var width = this._sock.rQshift16(); - var height = this._sock.rQshift16(); - this._display.fillRect(this._FBU.x + x, this._FBU.y + y, width, height, color); - this._FBU.subrects--; - } - - if (this._FBU.subrects > 0) { - var chunk = Math.min(this._rre_chunk_sz, this._FBU.subrects); - this._FBU.bytes = (4 + 8) * chunk; - } else { - this._FBU.rects--; - this._FBU.bytes = 0; - } - - return true; - }, - - HEXTILE: function () { - var rQ = this._sock.get_rQ(); - var rQi = this._sock.get_rQi(); - - if (this._FBU.tiles === 0) { - this._FBU.tiles_x = Math.ceil(this._FBU.width / 16); - this._FBU.tiles_y = Math.ceil(this._FBU.height / 16); - this._FBU.total_tiles = this._FBU.tiles_x * this._FBU.tiles_y; - this._FBU.tiles = this._FBU.total_tiles; - } - - while (this._FBU.tiles > 0) { - this._FBU.bytes = 1; - if (this._sock.rQwait("HEXTILE subencoding", this._FBU.bytes)) { return false; } - var subencoding = rQ[rQi]; // Peek - if (subencoding > 30) { // Raw - this._fail("Illegal hextile subencoding (subencoding: " + - subencoding + ")"); - return false; - } - - var subrects = 0; - var curr_tile = this._FBU.total_tiles - this._FBU.tiles; - var tile_x = curr_tile % this._FBU.tiles_x; - var tile_y = Math.floor(curr_tile / this._FBU.tiles_x); - var x = this._FBU.x + tile_x * 16; - var y = this._FBU.y + tile_y * 16; - var w = Math.min(16, (this._FBU.x + this._FBU.width) - x); - var h = Math.min(16, (this._FBU.y + this._FBU.height) - y); - - // Figure out how much we are expecting - if (subencoding & 0x01) { // Raw - this._FBU.bytes += w * h * 4; - } else { - if (subencoding & 0x02) { // Background - this._FBU.bytes += 4; - } - if (subencoding & 0x04) { // Foreground - this._FBU.bytes += 4; - } - if (subencoding & 0x08) { // AnySubrects - this._FBU.bytes++; // Since we aren't shifting it off - if (this._sock.rQwait("hextile subrects header", this._FBU.bytes)) { return false; } - subrects = rQ[rQi + this._FBU.bytes - 1]; // Peek - if (subencoding & 0x10) { // SubrectsColoured - this._FBU.bytes += subrects * (4 + 2); - } else { - this._FBU.bytes += subrects * 2; - } - } - } - - if (this._sock.rQwait("hextile", this._FBU.bytes)) { return false; } - - // We know the encoding and have a whole tile - this._FBU.subencoding = rQ[rQi]; - rQi++; - if (this._FBU.subencoding === 0) { - if (this._FBU.lastsubencoding & 0x01) { - // Weird: ignore blanks are RAW - Log.Debug(" Ignoring blank after RAW"); - } else { - this._display.fillRect(x, y, w, h, this._FBU.background); - } - } else if (this._FBU.subencoding & 0x01) { // Raw - this._display.blitImage(x, y, w, h, rQ, rQi); - rQi += this._FBU.bytes - 1; - } else { - if (this._FBU.subencoding & 0x02) { // Background - this._FBU.background = [rQ[rQi], rQ[rQi + 1], rQ[rQi + 2], rQ[rQi + 3]]; - rQi += 4; - } - if (this._FBU.subencoding & 0x04) { // Foreground - this._FBU.foreground = [rQ[rQi], rQ[rQi + 1], rQ[rQi + 2], rQ[rQi + 3]]; - rQi += 4; - } - - this._display.startTile(x, y, w, h, this._FBU.background); - if (this._FBU.subencoding & 0x08) { // AnySubrects - subrects = rQ[rQi]; - rQi++; - - for (var s = 0; s < subrects; s++) { - var color; - if (this._FBU.subencoding & 0x10) { // SubrectsColoured - color = [rQ[rQi], rQ[rQi + 1], rQ[rQi + 2], rQ[rQi + 3]]; - rQi += 4; - } else { - color = this._FBU.foreground; - } - var xy = rQ[rQi]; - rQi++; - var sx = (xy >> 4); - var sy = (xy & 0x0f); - - var wh = rQ[rQi]; - rQi++; - var sw = (wh >> 4) + 1; - var sh = (wh & 0x0f) + 1; - - this._display.subTile(sx, sy, sw, sh, color); - } - } - this._display.finishTile(); - } - this._sock.set_rQi(rQi); - this._FBU.lastsubencoding = this._FBU.subencoding; - this._FBU.bytes = 0; - this._FBU.tiles--; - } - - if (this._FBU.tiles === 0) { - this._FBU.rects--; - } - - return true; - }, - - TIGHT: function () { - this._FBU.bytes = 1; // compression-control byte - if (this._sock.rQwait("TIGHT compression-control", this._FBU.bytes)) { return false; } - - var checksum = function (data) { - var sum = 0; - for (var i = 0; i < data.length; i++) { - sum += data[i]; - if (sum > 65536) sum -= 65536; - } - return sum; - }; - - var resetStreams = 0; - var streamId = -1; - var decompress = function (data, expected) { - for (var i = 0; i < 4; i++) { - if ((resetStreams >> i) & 1) { - this._FBU.zlibs[i].reset(); - Log.Info("Reset zlib stream " + i); - } - } - - //var uncompressed = this._FBU.zlibs[streamId].uncompress(data, 0); - var uncompressed = this._FBU.zlibs[streamId].inflate(data, true, expected); - /*if (uncompressed.status !== 0) { - Log.Error("Invalid data in zlib stream"); - }*/ - - //return uncompressed.data; - return uncompressed; - }.bind(this); - - var indexedToRGBX2Color = function (data, palette, width, height) { - // Convert indexed (palette based) image data to RGB - // TODO: reduce number of calculations inside loop - var dest = this._destBuff; - var w = Math.floor((width + 7) / 8); - var w1 = Math.floor(width / 8); - - /*for (var y = 0; y < height; y++) { - var b, x, dp, sp; - var yoffset = y * width; - var ybitoffset = y * w; - var xoffset, targetbyte; - for (x = 0; x < w1; x++) { - xoffset = yoffset + x * 8; - targetbyte = data[ybitoffset + x]; - for (b = 7; b >= 0; b--) { - dp = (xoffset + 7 - b) * 3; - sp = (targetbyte >> b & 1) * 3; - dest[dp] = palette[sp]; - dest[dp + 1] = palette[sp + 1]; - dest[dp + 2] = palette[sp + 2]; - } - } - - xoffset = yoffset + x * 8; - targetbyte = data[ybitoffset + x]; - for (b = 7; b >= 8 - width % 8; b--) { - dp = (xoffset + 7 - b) * 3; - sp = (targetbyte >> b & 1) * 3; - dest[dp] = palette[sp]; - dest[dp + 1] = palette[sp + 1]; - dest[dp + 2] = palette[sp + 2]; - } - }*/ - - for (var y = 0; y < height; y++) { - var b, x, dp, sp; - for (x = 0; x < w1; x++) { - for (b = 7; b >= 0; b--) { - dp = (y * width + x * 8 + 7 - b) * 4; - sp = (data[y * w + x] >> b & 1) * 3; - dest[dp] = palette[sp]; - dest[dp + 1] = palette[sp + 1]; - dest[dp + 2] = palette[sp + 2]; - dest[dp + 3] = 255; - } - } - - for (b = 7; b >= 8 - width % 8; b--) { - dp = (y * width + x * 8 + 7 - b) * 4; - sp = (data[y * w + x] >> b & 1) * 3; - dest[dp] = palette[sp]; - dest[dp + 1] = palette[sp + 1]; - dest[dp + 2] = palette[sp + 2]; - dest[dp + 3] = 255; - } - } - - return dest; - }.bind(this); - - var indexedToRGBX = function (data, palette, width, height) { - // Convert indexed (palette based) image data to RGB - var dest = this._destBuff; - var total = width * height * 4; - for (var i = 0, j = 0; i < total; i += 4, j++) { - var sp = data[j] * 3; - dest[i] = palette[sp]; - dest[i + 1] = palette[sp + 1]; - dest[i + 2] = palette[sp + 2]; - dest[i + 3] = 255; - } - - return dest; - }.bind(this); - - var rQi = this._sock.get_rQi(); - var rQ = this._sock.rQwhole(); - var cmode, data; - var cl_header, cl_data; - - var handlePalette = function () { - var numColors = rQ[rQi + 2] + 1; - var paletteSize = numColors * 3; - this._FBU.bytes += paletteSize; - if (this._sock.rQwait("TIGHT palette " + cmode, this._FBU.bytes)) { return false; } - - var bpp = (numColors <= 2) ? 1 : 8; - var rowSize = Math.floor((this._FBU.width * bpp + 7) / 8); - var raw = false; - if (rowSize * this._FBU.height < 12) { - raw = true; - cl_header = 0; - cl_data = rowSize * this._FBU.height; - //clength = [0, rowSize * this._FBU.height]; - } else { - // begin inline getTightCLength (returning two-item arrays is bad for performance with GC) - var cl_offset = rQi + 3 + paletteSize; - cl_header = 1; - cl_data = 0; - cl_data += rQ[cl_offset] & 0x7f; - if (rQ[cl_offset] & 0x80) { - cl_header++; - cl_data += (rQ[cl_offset + 1] & 0x7f) << 7; - if (rQ[cl_offset + 1] & 0x80) { - cl_header++; - cl_data += rQ[cl_offset + 2] << 14; - } - } - // end inline getTightCLength - } - - this._FBU.bytes += cl_header + cl_data; - if (this._sock.rQwait("TIGHT " + cmode, this._FBU.bytes)) { return false; } - - // Shift ctl, filter id, num colors, palette entries, and clength off - this._sock.rQskipBytes(3); - //var palette = this._sock.rQshiftBytes(paletteSize); - this._sock.rQshiftTo(this._paletteBuff, paletteSize); - this._sock.rQskipBytes(cl_header); - - if (raw) { - data = this._sock.rQshiftBytes(cl_data); - } else { - data = decompress(this._sock.rQshiftBytes(cl_data), rowSize * this._FBU.height); - } - - // Convert indexed (palette based) image data to RGB - var rgbx; - if (numColors == 2) { - rgbx = indexedToRGBX2Color(data, this._paletteBuff, this._FBU.width, this._FBU.height); - this._display.blitRgbxImage(this._FBU.x, this._FBU.y, this._FBU.width, this._FBU.height, rgbx, 0, false); - } else { - rgbx = indexedToRGBX(data, this._paletteBuff, this._FBU.width, this._FBU.height); - this._display.blitRgbxImage(this._FBU.x, this._FBU.y, this._FBU.width, this._FBU.height, rgbx, 0, false); - } - - - return true; - }.bind(this); - - var handleCopy = function () { - var raw = false; - var uncompressedSize = this._FBU.width * this._FBU.height * 3; - if (uncompressedSize < 12) { - raw = true; - cl_header = 0; - cl_data = uncompressedSize; - } else { - // begin inline getTightCLength (returning two-item arrays is for peformance with GC) - var cl_offset = rQi + 1; - cl_header = 1; - cl_data = 0; - cl_data += rQ[cl_offset] & 0x7f; - if (rQ[cl_offset] & 0x80) { - cl_header++; - cl_data += (rQ[cl_offset + 1] & 0x7f) << 7; - if (rQ[cl_offset + 1] & 0x80) { - cl_header++; - cl_data += rQ[cl_offset + 2] << 14; - } - } - // end inline getTightCLength - } - this._FBU.bytes = 1 + cl_header + cl_data; - if (this._sock.rQwait("TIGHT " + cmode, this._FBU.bytes)) { return false; } - - // Shift ctl, clength off - this._sock.rQshiftBytes(1 + cl_header); - - if (raw) { - data = this._sock.rQshiftBytes(cl_data); - } else { - data = decompress(this._sock.rQshiftBytes(cl_data), uncompressedSize); - } - - this._display.blitRgbImage(this._FBU.x, this._FBU.y, this._FBU.width, this._FBU.height, data, 0, false); - - return true; - }.bind(this); - - var ctl = this._sock.rQpeek8(); - - // Keep tight reset bits - resetStreams = ctl & 0xF; - - // Figure out filter - ctl = ctl >> 4; - streamId = ctl & 0x3; - - if (ctl === 0x08) cmode = "fill"; - else if (ctl === 0x09) cmode = "jpeg"; - else if (ctl === 0x0A) cmode = "png"; - else if (ctl & 0x04) cmode = "filter"; - else if (ctl < 0x04) cmode = "copy"; - else return this._fail("Illegal tight compression received (ctl: " + - ctl + ")"); - - switch (cmode) { - // fill use depth because TPIXELs drop the padding byte - case "fill": // TPIXEL - this._FBU.bytes += 3; - break; - case "jpeg": // max clength - this._FBU.bytes += 3; - break; - case "png": // max clength - this._FBU.bytes += 3; - break; - case "filter": // filter id + num colors if palette - this._FBU.bytes += 2; - break; - case "copy": - break; - } - - if (this._sock.rQwait("TIGHT " + cmode, this._FBU.bytes)) { return false; } - - // Determine FBU.bytes - switch (cmode) { - case "fill": - // skip ctl byte - this._display.fillRect(this._FBU.x, this._FBU.y, this._FBU.width, this._FBU.height, [rQ[rQi + 3], rQ[rQi + 2], rQ[rQi + 1]], false); - this._sock.rQskipBytes(4); - break; - case "png": - case "jpeg": - // begin inline getTightCLength (returning two-item arrays is for peformance with GC) - var cl_offset = rQi + 1; - cl_header = 1; - cl_data = 0; - cl_data += rQ[cl_offset] & 0x7f; - if (rQ[cl_offset] & 0x80) { - cl_header++; - cl_data += (rQ[cl_offset + 1] & 0x7f) << 7; - if (rQ[cl_offset + 1] & 0x80) { - cl_header++; - cl_data += rQ[cl_offset + 2] << 14; - } - } - // end inline getTightCLength - this._FBU.bytes = 1 + cl_header + cl_data; // ctl + clength size + jpeg-data - if (this._sock.rQwait("TIGHT " + cmode, this._FBU.bytes)) { return false; } - - // We have everything, render it - this._sock.rQskipBytes(1 + cl_header); // shift off clt + compact length - data = this._sock.rQshiftBytes(cl_data); - this._display.imageRect(this._FBU.x, this._FBU.y, "image/" + cmode, data); - break; - case "filter": - var filterId = rQ[rQi + 1]; - if (filterId === 1) { - if (!handlePalette()) { return false; } - } else { - // Filter 0, Copy could be valid here, but servers don't send it as an explicit filter - // Filter 2, Gradient is valid but not use if jpeg is enabled - this._fail("Unsupported tight subencoding received " + - "(filter: " + filterId + ")"); - } - break; - case "copy": - if (!handleCopy()) { return false; } - break; - } - - - this._FBU.bytes = 0; - this._FBU.rects--; - - return true; - }, - - last_rect: function () { - this._FBU.rects = 0; - return true; - }, - - ExtendedDesktopSize: function () { - this._FBU.bytes = 1; - if (this._sock.rQwait("ExtendedDesktopSize", this._FBU.bytes)) { return false; } - - var 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(); - } - - var number_of_screens = this._sock.rQpeek8(); - - this._FBU.bytes = 4 + (number_of_screens * 16); - if (this._sock.rQwait("ExtendedDesktopSize", this._FBU.bytes)) { return false; } - - this._sock.rQskipBytes(1); // number-of-screens - this._sock.rQskipBytes(3); // padding - - for (var 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) { - var 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); - } - - this._FBU.bytes = 0; - this._FBU.rects -= 1; - return true; - }, - - DesktopSize: function () { - this._resize(this._FBU.width, this._FBU.height); - this._FBU.bytes = 0; - this._FBU.rects -= 1; - return true; - }, - - Cursor: function () { - Log.Debug(">> set_cursor"); - var x = this._FBU.x; // hotspot-x - var y = this._FBU.y; // hotspot-y - var w = this._FBU.width; - var h = this._FBU.height; - - var pixelslength = w * h * 4; - var masklength = Math.floor((w + 7) / 8) * h; - - this._FBU.bytes = pixelslength + masklength; - if (this._sock.rQwait("cursor encoding", this._FBU.bytes)) { return false; } - - this._display.changeCursor(this._sock.rQshiftBytes(pixelslength), - this._sock.rQshiftBytes(masklength), - x, y, w, h); - - this._FBU.bytes = 0; - this._FBU.rects--; - - Log.Debug("<< set_cursor"); - return true; - }, - - QEMUExtendedKeyEvent: function () { - this._FBU.rects--; - - // Old Safari doesn't support creating keyboard events - try { - var keyboardEvent = document.createEvent("keyboardEvent"); - if (keyboardEvent.code !== undefined) { - this._qemuExtKeyEventSupported = true; - } - } catch (err) { - } - }, -};