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Diffstat (limited to 'webclients/novnc/core/rfb.js')
| -rw-r--r-- | webclients/novnc/core/rfb.js | 2540 |
1 files changed, 2540 insertions, 0 deletions
diff --git a/webclients/novnc/core/rfb.js b/webclients/novnc/core/rfb.js new file mode 100644 index 0000000..7c4e0c9 --- /dev/null +++ b/webclients/novnc/core/rfb.js @@ -0,0 +1,2540 @@ +/* + * 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; + } + + 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 + 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: 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; + 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) { + } + }, +}; |