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-/*
- * noVNC: HTML5 VNC client
- * Copyright (C) 2012 Joel Martin
- * Copyright (C) 2013 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)
- */
-
-/*jslint white: false, browser: true */
-/*global window, Util, Display, Keyboard, Mouse, Websock, Websock_native, Base64, DES */
-
-var RFB;
-
-(function () {
- "use strict";
- RFB = function (defaults) {
- if (!defaults) {
- defaults = {};
- }
-
- this._rfb_host = '';
- this._rfb_port = 5900;
- this._rfb_password = '';
- this._rfb_path = '';
-
- this._rfb_state = 'disconnected';
- this._rfb_version = 0;
- this._rfb_max_version = 3.8;
- this._rfb_auth_scheme = '';
-
- this._rfb_tightvnc = false;
- this._rfb_xvp_ver = 0;
-
- // In preference order
- this._encodings = [
- ['COPYRECT', 0x01 ],
- ['TIGHT', 0x07 ],
- ['TIGHT_PNG', -260 ],
- ['HEXTILE', 0x05 ],
- ['RRE', 0x02 ],
- ['RAW', 0x00 ],
- ['DesktopSize', -223 ],
- ['Cursor', -239 ],
-
- // Psuedo-encoding settings
- //['JPEG_quality_lo', -32 ],
- ['JPEG_quality_med', -26 ],
- //['JPEG_quality_hi', -23 ],
- //['compress_lo', -255 ],
- ['compress_hi', -247 ],
- ['last_rect', -224 ],
- ['xvp', -309 ]
- ];
-
- this._encHandlers = {};
- this._encNames = {};
- this._encStats = {};
-
- this._sock = null; // Websock object
- this._display = null; // Display object
- this._keyboard = null; // Keyboard input handler object
- this._mouse = null; // Mouse input handler object
- this._sendTimer = null; // Send Queue check timer
- this._disconnTimer = null; // disconnection timer
- this._msgTimer = null; // queued handle_msg timer
-
- // Frame buffer update state
- this._FBU = {
- rects: 0,
- subrects: 0, // RRE
- lines: 0, // RAW
- tiles: 0, // HEXTILE
- bytes: 0,
- x: 0,
- y: 0,
- width: 0,
- height: 0,
- encoding: 0,
- subencoding: -1,
- background: null,
- zlib: [] // TIGHT zlib streams
- };
-
- this._fb_Bpp = 4;
- this._fb_depth = 3;
- this._fb_width = 0;
- this._fb_height = 0;
- this._fb_name = "";
-
- 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 = {};
-
- // set the default value on user-facing properties
- Util.set_defaults(this, defaults, {
- 'target': 'null', // VNC display rendering Canvas object
- 'focusContainer': document, // DOM element that captures keyboard input
- 'encrypt': false, // Use TLS/SSL/wss encryption
- 'true_color': true, // Request true color pixel data
- 'local_cursor': false, // Request locally rendered cursor
- 'shared': true, // Request shared mode
- 'view_only': false, // Disable client mouse/keyboard
- 'xvp_password_sep': '@', // Separator for XVP password fields
- 'disconnectTimeout': 3, // Time (s) to wait for disconnection
- 'wsProtocols': ['binary', 'base64'], // Protocols to use in the WebSocket connection
- 'repeaterID': '', // [UltraVNC] RepeaterID to connect to
- 'viewportDrag': false, // Move the viewport on mouse drags
-
- // Callback functions
- 'onUpdateState': function () { }, // onUpdateState(rfb, state, oldstate, statusMsg): state update/change
- 'onPasswordRequired': function () { }, // onPasswordRequired(rfb): VNC password is required
- 'onClipboard': function () { }, // onClipboard(rfb, text): RFB clipboard contents received
- 'onBell': function () { }, // onBell(rfb): RFB Bell message received
- 'onFBUReceive': function () { }, // onFBUReceive(rfb, fbu): RFB FBU received but not yet processed
- 'onFBUComplete': function () { }, // onFBUComplete(rfb, fbu): RFB FBU received and processed
- 'onFBResize': function () { }, // onFBResize(rfb, width, height): frame buffer resized
- 'onDesktopName': function () { }, // onDesktopName(rfb, name): desktop name received
- 'onXvpInit': function () { }, // onXvpInit(version): XVP extensions active for this connection
- });
-
- // main setup
- Util.Debug(">> RFB.constructor");
-
- // populate encHandlers with bound versions
- Object.keys(RFB.encodingHandlers).forEach(function (encName) {
- this._encHandlers[encName] = RFB.encodingHandlers[encName].bind(this);
- }.bind(this));
-
- // Create lookup tables based on encoding number
- for (var i = 0; i < this._encodings.length; i++) {
- this._encHandlers[this._encodings[i][1]] = this._encHandlers[this._encodings[i][0]];
- this._encNames[this._encodings[i][1]] = this._encodings[i][0];
- this._encStats[this._encodings[i][1]] = [0, 0];
- }
-
- try {
- this._display = new Display({target: this._target});
- } catch (exc) {
- Util.Error("Display exception: " + exc);
- this._updateState('fatal', "No working Display");
- }
-
- this._keyboard = new Keyboard({target: this._focusContainer,
- onKeyPress: this._handleKeyPress.bind(this)});
-
- this._mouse = new Mouse({target: this._target,
- onMouseButton: this._handleMouseButton.bind(this),
- onMouseMove: this._handleMouseMove.bind(this),
- notify: this._keyboard.sync.bind(this._keyboard)});
-
- this._sock = new Websock();
- this._sock.on('message', this._handle_message.bind(this));
- this._sock.on('open', function () {
- if (this._rfb_state === 'connect') {
- this._updateState('ProtocolVersion', "Starting VNC handshake");
- } else {
- this._fail("Got unexpected WebSocket connection");
- }
- }.bind(this));
- this._sock.on('close', function (e) {
- Util.Warn("WebSocket on-close event");
- var msg = "";
- if (e.code) {
- msg = " (code: " + e.code;
- if (e.reason) {
- msg += ", reason: " + e.reason;
- }
- msg += ")";
- }
- if (this._rfb_state === 'disconnect') {
- this._updateState('disconnected', 'VNC disconnected' + msg);
- } else if (this._rfb_state === 'ProtocolVersion') {
- this._fail('Failed to connect to server' + msg);
- } else if (this._rfb_state in {'failed': 1, 'disconnected': 1}) {
- Util.Error("Received onclose while disconnected" + msg);
- } else {
- this._fail("Server disconnected" + msg);
- }
- }.bind(this));
- this._sock.on('error', function (e) {
- Util.Warn("WebSocket on-error event");
- });
-
- this._init_vars();
-
- var rmode = this._display.get_render_mode();
- if (Websock_native) {
- Util.Info("Using native WebSockets");
- this._updateState('loaded', 'noVNC ready: native WebSockets, ' + rmode);
- } else {
- Util.Warn("Using web-socket-js bridge. Flash version: " + Util.Flash.version);
- if (!Util.Flash || Util.Flash.version < 9) {
- this._updateState('fatal', "WebSockets or <a href='http://get.adobe.com/flashplayer'>Adobe Flash</a> is required");
- } else if (document.location.href.substr(0, 7) === 'file://') {
- this._updateState('fatal', "'file://' URL is incompatible with Adobe Flash");
- } else {
- this._updateState('loaded', 'noVNC ready: WebSockets emulation, ' + rmode);
- }
- }
-
- Util.Debug("<< RFB.constructor");
- };
-
- RFB.prototype = {
- // Public methods
- connect: function (host, port, password, path) {
- this._rfb_host = host;
- this._rfb_port = port;
- this._rfb_password = (password !== undefined) ? password : "";
- this._rfb_path = (path !== undefined) ? path : "";
-
- if (!this._rfb_host || !this._rfb_port) {
- return this._fail("Must set host and port");
- }
-
- this._updateState('connect');
- },
-
- disconnect: function () {
- this._updateState('disconnect', 'Disconnecting');
- },
-
- sendPassword: function (passwd) {
- this._rfb_password = passwd;
- this._rfb_state = 'Authentication';
- setTimeout(this._init_msg.bind(this), 1);
- },
-
- sendCtrlAltDel: function () {
- if (this._rfb_state !== 'normal' || this._view_only) { return false; }
- Util.Info("Sending Ctrl-Alt-Del");
-
- var arr = [];
- arr = arr.concat(RFB.messages.keyEvent(XK_Control_L, 1));
- arr = arr.concat(RFB.messages.keyEvent(XK_Alt_L, 1));
- arr = arr.concat(RFB.messages.keyEvent(XK_Delete, 1));
- arr = arr.concat(RFB.messages.keyEvent(XK_Delete, 0));
- arr = arr.concat(RFB.messages.keyEvent(XK_Alt_L, 0));
- arr = arr.concat(RFB.messages.keyEvent(XK_Control_L, 0));
- this._sock.send(arr);
- },
-
- xvpOp: function (ver, op) {
- if (this._rfb_xvp_ver < ver) { return false; }
- Util.Info("Sending XVP operation " + op + " (version " + ver + ")");
- this._sock.send_string("\xFA\x00" + String.fromCharCode(ver) + String.fromCharCode(op));
- return true;
- },
-
- xvpShutdown: function () {
- return this.xvpOp(1, 2);
- },
-
- xvpReboot: function () {
- return this.xvpOp(1, 3);
- },
-
- xvpReset: function () {
- return 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 (code, down) {
- if (this._rfb_state !== "normal" || this._view_only) { return false; }
- var arr = [];
- if (typeof down !== 'undefined') {
- Util.Info("Sending key code (" + (down ? "down" : "up") + "): " + code);
- arr = arr.concat(RFB.messages.keyEvent(code, down ? 1 : 0));
- } else {
- Util.Info("Sending key code (down + up): " + code);
- arr = arr.concat(RFB.messages.keyEvent(code, 1));
- arr = arr.concat(RFB.messages.keyEvent(code, 0));
- }
- this._sock.send(arr);
- },
-
- clipboardPasteFrom: function (text) {
- if (this._rfb_state !== 'normal') { return; }
- this._sock.send(RFB.messages.clientCutText(text));
- },
-
- // Private methods
-
- _connect: function () {
- Util.Debug(">> RFB.connect");
-
- var uri;
- if (typeof UsingSocketIO !== 'undefined') {
- uri = 'http';
- } else {
- uri = this._encrypt ? 'wss' : 'ws';
- }
-
- uri += '://' + this._rfb_host + ':' + this._rfb_port + '/' + this._rfb_path;
- Util.Info("connecting to " + uri);
-
- this._sock.open(uri, this._wsProtocols);
-
- Util.Debug("<< RFB.connect");
- },
-
- _init_vars: function () {
- // reset state
- this._sock.init();
-
- this._FBU.rects = 0;
- this._FBU.subrects = 0; // RRE and HEXTILE
- this._FBU.lines = 0; // RAW
- this._FBU.tiles = 0; // HEXTILE
- this._FBU.zlibs = []; // TIGHT zlib encoders
- this._mouse_buttonMask = 0;
- this._mouse_arr = [];
- this._rfb_tightvnc = false;
-
- // Clear the per connection encoding stats
- var i;
- for (i = 0; i < this._encodings.length; i++) {
- this._encStats[this._encodings[i][1]][0] = 0;
- }
-
- for (i = 0; i < 4; i++) {
- this._FBU.zlibs[i] = new TINF();
- this._FBU.zlibs[i].init();
- }
- },
-
- _print_stats: function () {
- Util.Info("Encoding stats for this connection:");
- var i, s;
- for (i = 0; i < this._encodings.length; i++) {
- s = this._encStats[this._encodings[i][1]];
- if (s[0] + s[1] > 0) {
- Util.Info(" " + this._encodings[i][0] + ": " + s[0] + " rects");
- }
- }
-
- Util.Info("Encoding stats since page load:");
- for (i = 0; i < this._encodings.length; i++) {
- s = this._encStats[this._encodings[i][1]];
- Util.Info(" " + this._encodings[i][0] + ": " + s[1] + " rects");
- }
- },
-
-
- /*
- * Page states:
- * loaded - page load, equivalent to disconnected
- * disconnected - idle state
- * connect - starting to connect (to ProtocolVersion)
- * normal - connected
- * disconnect - starting to disconnect
- * failed - abnormal disconnect
- * fatal - failed to load page, or fatal error
- *
- * RFB protocol initialization states:
- * ProtocolVersion
- * Security
- * Authentication
- * password - waiting for password, not part of RFB
- * SecurityResult
- * ClientInitialization - not triggered by server message
- * ServerInitialization (to normal)
- */
- _updateState: function (state, statusMsg) {
- var oldstate = this._rfb_state;
-
- if (state === oldstate) {
- // Already here, ignore
- Util.Debug("Already in state '" + state + "', ignoring");
- }
-
- /*
- * These are disconnected states. A previous connect may
- * asynchronously cause a connection so make sure we are closed.
- */
- if (state in {'disconnected': 1, 'loaded': 1, 'connect': 1,
- 'disconnect': 1, 'failed': 1, 'fatal': 1}) {
-
- if (this._sendTimer) {
- clearInterval(this._sendTimer);
- this._sendTimer = null;
- }
-
- if (this._msgTimer) {
- clearInterval(this._msgTimer);
- this._msgTimer = null;
- }
-
- if (this._display && this._display.get_context()) {
- this._keyboard.ungrab();
- this._mouse.ungrab();
- this._display.defaultCursor();
- if (Util.get_logging() !== 'debug' || state === 'loaded') {
- // Show noVNC logo on load and when disconnected, unless in
- // debug mode
- this._display.clear();
- }
- }
-
- this._sock.close();
- }
-
- if (oldstate === 'fatal') {
- Util.Error('Fatal error, cannot continue');
- }
-
- var cmsg = typeof(statusMsg) !== 'undefined' ? (" Msg: " + statusMsg) : "";
- var fullmsg = "New state '" + state + "', was '" + oldstate + "'." + cmsg;
- if (state === 'failed' || state === 'fatal') {
- Util.Error(cmsg);
- } else {
- Util.Warn(cmsg);
- }
-
- if (oldstate === 'failed' && state === 'disconnected') {
- // do disconnect action, but stay in failed state
- this._rfb_state = 'failed';
- } else {
- this._rfb_state = state;
- }
-
- if (this._disconnTimer && this._rfb_state !== 'disconnect') {
- Util.Debug("Clearing disconnect timer");
- clearTimeout(this._disconnTimer);
- this._disconnTimer = null;
- }
-
- switch (state) {
- case 'normal':
- if (oldstate === 'disconnected' || oldstate === 'failed') {
- Util.Error("Invalid transition from 'disconnected' or 'failed' to 'normal'");
- }
- break;
-
- case 'connect':
- this._init_vars();
- this._connect();
- // WebSocket.onopen transitions to 'ProtocolVersion'
- break;
-
- case 'disconnect':
- this._disconnTimer = setTimeout(function () {
- this._fail("Disconnect timeout");
- }.bind(this), this._disconnectTimeout * 1000);
-
- this._print_stats();
-
- // WebSocket.onclose transitions to 'disconnected'
- break;
-
- case 'failed':
- if (oldstate === 'disconnected') {
- Util.Error("Invalid transition from 'disconnected' to 'failed'");
- } else if (oldstate === 'normal') {
- Util.Error("Error while connected.");
- } else if (oldstate === 'init') {
- Util.Error("Error while initializing.");
- }
-
- // Make sure we transition to disconnected
- setTimeout(function () {
- this._updateState('disconnected');
- }.bind(this), 50);
-
- break;
-
- default:
- // No state change action to take
- }
-
- if (oldstate === 'failed' && state === 'disconnected') {
- this._onUpdateState(this, state, oldstate);
- } else {
- this._onUpdateState(this, state, oldstate, statusMsg);
- }
- },
-
- _fail: function (msg) {
- this._updateState('failed', msg);
- return false;
- },
-
- _handle_message: function () {
- if (this._sock.rQlen() === 0) {
- Util.Warn("handle_message called on an empty receive queue");
- return;
- }
-
- switch (this._rfb_state) {
- case 'disconnected':
- case 'failed':
- Util.Error("Got data while disconnected");
- break;
- case 'normal':
- if (this._normal_msg() && this._sock.rQlen() > 0) {
- // true means we can continue processing
- // Give other events a chance to run
- if (this._msgTimer === null) {
- Util.Debug("More data to process, creating timer");
- this._msgTimer = setTimeout(function () {
- this._msgTimer = null;
- this._handle_message();
- }.bind(this), 10);
- } else {
- Util.Debug("More data to process, existing timer");
- }
- }
- break;
- default:
- this._init_msg();
- break;
- }
- },
-
- _checkEvents: function () {
- if (this._rfb_state === 'normal' && !this._viewportDragging && this._mouse_arr.length > 0) {
- this._sock.send(this._mouse_arr);
- this._mouse_arr = [];
- }
- },
-
- _handleKeyPress: function (keysym, down) {
- if (this._view_only) { return; } // View only, skip keyboard, events
- this._sock.send(RFB.messages.keyEvent(keysym, down));
- },
-
- _handleMouseButton: function (x, y, down, bmask) {
- if (down) {
- this._mouse_buttonMask |= bmask;
- } else {
- this._mouse_buttonMask ^= bmask;
- }
-
- if (this._viewportDrag) {
- if (down && !this._viewportDragging) {
- this._viewportDragging = true;
- this._viewportDragPos = {'x': x, 'y': y};
-
- // Skip sending mouse events
- return;
- } else {
- this._viewportDragging = false;
- }
- }
-
- if (this._view_only) { return; } // View only, skip mouse events
-
- this._mouse_arr = this._mouse_arr.concat(
- RFB.messages.pointerEvent(this._display.absX(x), this._display.absY(y), this._mouse_buttonMask));
- this._sock.send(this._mouse_arr);
- this._mouse_arr = [];
- },
-
- _handleMouseMove: function (x, y) {
- if (this._viewportDragging) {
- var deltaX = this._viewportDragPos.x - x;
- var deltaY = this._viewportDragPos.y - y;
- this._viewportDragPos = {'x': x, 'y': y};
-
- this._display.viewportChange(deltaX, deltaY);
-
- // Skip sending mouse events
- return;
- }
-
- if (this._view_only) { return; } // View only, skip mouse events
-
- this._mouse_arr = this._mouse_arr.concat(
- RFB.messages.pointerEvent(this._display.absX(x), this._display.absY(y), this._mouse_buttonMask));
-
- this._checkEvents();
- },
-
- // Message Handlers
-
- _negotiate_protocol_version: function () {
- if (this._sock.rQlen() < 12) {
- return this._fail("Incomplete protocol version");
- }
-
- var sversion = this._sock.rQshiftStr(12).substr(4, 7);
- Util.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
- this._rfb_version = 3.8;
- break;
- default:
- return this._fail("Invalid server version " + sversion);
- }
-
- if (is_repeater) {
- var repeaterID = 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;
- }
-
- // Send updates either at a rate of 1 update per 50ms, or
- // whatever slower rate the network can handle
- this._sendTimer = setInterval(this._sock.flush.bind(this._sock), 50);
-
- var cversion = "00" + parseInt(this._rfb_version, 10) +
- ".00" + ((this._rfb_version * 10) % 10);
- this._sock.send_string("RFB " + cversion + "\n");
- this._updateState('Security', 'Sent ProtocolVersion: ' + cversion);
- },
-
- _negotiate_security: function () {
- 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) {
- var strlen = this._sock.rQshift32();
- var reason = this._sock.rQshiftStr(strlen);
- return this._fail("Security failure: " + reason);
- }
-
- this._rfb_auth_scheme = 0;
- var types = this._sock.rQshiftBytes(num_types);
- Util.Debug("Server security types: " + types);
- for (var i = 0; i < types.length; i++) {
- if (types[i] > this._rfb_auth_scheme && (types[i] <= 16 || types[i] == 22)) {
- this._rfb_auth_scheme = types[i];
- }
- }
-
- if (this._rfb_auth_scheme === 0) {
- return this._fail("Unsupported security 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._updateState('Authentication', 'Authenticating using scheme: ' + this._rfb_auth_scheme);
- return this._init_msg(); // jump to authentication
- },
-
- // authentication
- _negotiate_xvp_auth: function () {
- var xvp_sep = this._xvp_password_sep;
- var xvp_auth = this._rfb_password.split(xvp_sep);
- if (xvp_auth.length < 3) {
- this._updateState('password', 'XVP credentials required (user' + xvp_sep +
- 'target' + xvp_sep + 'password) -- got only ' + this._rfb_password);
- this._onPasswordRequired(this);
- return false;
- }
-
- var xvp_auth_str = String.fromCharCode(xvp_auth[0].length) +
- String.fromCharCode(xvp_auth[1].length) +
- xvp_auth[0] +
- xvp_auth[1];
- this._sock.send_string(xvp_auth_str);
- this._rfb_password = xvp_auth.slice(2).join(xvp_sep);
- this._rfb_auth_scheme = 2;
- return this._negotiate_authentication();
- },
-
- _negotiate_std_vnc_auth: function () {
- if (this._rfb_password.length === 0) {
- // Notify via both callbacks since it's kind of
- // an RFB state change and a UI interface issue
- this._updateState('password', "Password Required");
- this._onPasswordRequired(this);
- }
-
- if (this._sock.rQwait("auth challenge", 16)) { return false; }
-
- var challenge = this._sock.rQshiftBytes(16);
- var response = RFB.genDES(this._rfb_password, challenge);
- this._sock.send(response);
- this._updateState("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 (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._updateState('SecurityResult');
- return true;
- case 'STDVVNCAUTH_': // VNC auth
- this._rfb_auth_scheme = 2;
- return this._init_msg();
- default:
- return this._fail("Unsupported tiny auth scheme: " + authType);
- }
- }
- }
-
- this._fail("No supported sub-auth types!");
- },
-
- _negotiate_authentication: function () {
- switch (this._rfb_auth_scheme) {
- case 0: // connection failed
- if (this._sock.rQwait("auth reason", 4)) { return false; }
- var strlen = this._sock.rQshift32();
- var reason = this._sock.rQshiftStr(strlen);
- return this._fail("Auth failure: " + reason);
-
- case 1: // no auth
- if (this._rfb_version >= 3.8) {
- this._updateState('SecurityResult');
- return true;
- }
- this._updateState('ClientInitialisation', "No auth required");
- 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: " + this._rfb_auth_scheme);
- }
- },
-
- _handle_security_result: function () {
- if (this._sock.rQwait('VNC auth response ', 4)) { return false; }
- switch (this._sock.rQshift32()) {
- case 0: // OK
- this._updateState('ClientInitialisation', 'Authentication OK');
- return this._init_msg();
- case 1: // failed
- if (this._rfb_version >= 3.8) {
- var length = this._sock.rQshift32();
- if (this._sock.rQwait("SecurityResult reason", length, 8)) { return false; }
- var reason = this._sock.rQshiftStr(length);
- return this._fail(reason);
- } else {
- return this._fail("Authentication failure");
- }
- return false;
- case 2:
- return this._fail("Too many auth attempts");
- }
- },
-
- _negotiate_server_init: function () {
- if (this._sock.rQwait("server initialization", 24)) { return false; }
-
- /* Screen size */
- this._fb_width = this._sock.rQshift16();
- this._fb_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 = Util.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; }
-
- var i;
- for (i = 0; i < numServerMessages; i++) {
- var srvMsg = this._sock.rQshiftStr(16);
- }
-
- for (i = 0; i < numClientMessages; i++) {
- var clientMsg = this._sock.rQshiftStr(16);
- }
-
- for (i = 0; i < numEncodings; i++) {
- var encoding = this._sock.rQshiftStr(16);
- }
- }
-
- // NB(directxman12): these are down here so that we don't run them multiple times
- // if we backtrack
- Util.Info("Screen: " + this._fb_width + "x" + this._fb_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) {
- Util.Warn("Server native endian is not little endian");
- }
-
- if (red_shift !== 16) {
- Util.Warn("Server native red-shift is not 16");
- }
-
- if (blue_shift !== 0) {
- Util.Warn("Server native blue-shift is not 0");
- }
-
- // we're past the point where we could backtrack, so it's safe to call this
- this._onDesktopName(this, this._fb_name);
-
- if (this._true_color && this._fb_name === "Intel(r) AMT KVM") {
- Util.Warn("Intel AMT KVM only supports 8/16 bit depths. Disabling true color");
- this._true_color = false;
- }
-
- this._display.set_true_color(this._true_color);
- this._onFBResize(this, this._fb_width, this._fb_height);
- this._display.resize(this._fb_width, this._fb_height);
- this._keyboard.grab();
- this._mouse.grab();
-
- if (this._true_color) {
- this._fb_Bpp = 4;
- this._fb_depth = 3;
- } else {
- this._fb_Bpp = 1;
- this._fb_depth = 1;
- }
-
- var response = RFB.messages.pixelFormat(this._fb_Bpp, this._fb_depth, this._true_color);
- response = response.concat(
- RFB.messages.clientEncodings(this._encodings, this._local_cursor, this._true_color));
- response = response.concat(
- RFB.messages.fbUpdateRequests(this._display.getCleanDirtyReset(),
- this._fb_width, this._fb_height));
-
- this._timing.fbu_rt_start = (new Date()).getTime();
- this._timing.pixels = 0;
- this._sock.send(response);
-
- this._checkEvents();
-
- if (this._encrypt) {
- this._updateState('normal', 'Connected (encrypted) to: ' + this._fb_name);
- } else {
- this._updateState('normal', 'Connected (unencrypted) to: ' + this._fb_name);
- }
- },
-
- _init_msg: function () {
- switch (this._rfb_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._updateState('ServerInitialisation', "Authentication OK");
- return true;
-
- case 'ServerInitialisation':
- return this._negotiate_server_init();
- }
- },
-
- _handle_set_colour_map_msg: function () {
- Util.Debug("SetColorMapEntries");
- this._sock.rQskip8(); // Padding
-
- var first_colour = this._sock.rQshift16();
- var num_colours = this._sock.rQshift16();
- if (this._sock.rQwait('SetColorMapEntries', num_colours * 6, 6)) { return false; }
-
- for (var c = 0; c < num_colours; c++) {
- var red = parseInt(this._sock.rQshift16() / 256, 10);
- var green = parseInt(this._sock.rQshift16() / 256, 10);
- var blue = parseInt(this._sock.rQshift16() / 256, 10);
- this._display.set_colourMap([blue, green, red], first_colour + c);
- }
- Util.Debug("colourMap: " + this._display.get_colourMap());
- Util.Info("Registered " + num_colours + " colourMap entries");
-
- return true;
- },
-
- _handle_server_cut_text: function () {
- Util.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);
- this._onClipboard(this, text);
-
- 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
- this._updateState(this._rfb_state, "Operation Failed");
- break;
- case 1: // XVP_INIT
- this._rfb_xvp_ver = xvp_ver;
- Util.Info("XVP extensions enabled (version " + this._rfb_xvp_ver + ")");
- this._onXvpInit(this._rfb_xvp_ver);
- break;
- default:
- this._fail("Disconnected: illegal server XVP message " + 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._sock.send(RFB.messages.fbUpdateRequests(this._display.getCleanDirtyReset(),
- this._fb_width, this._fb_height));
- }
- return ret;
-
- case 1: // SetColorMapEntries
- return this._handle_set_colour_map_msg();
-
- case 2: // Bell
- Util.Debug("Bell");
- this._onBell(this);
- return true;
-
- case 3: // ServerCutText
- return this._handle_server_cut_text();
-
- case 250: // XVP
- return this._handle_xvp_msg();
-
- default:
- this._fail("Disconnected: illegal server message type " + msg_type);
- Util.Debug("sock.rQslice(0, 30): " + this._sock.rQslice(0, 30));
- return true;
- }
- },
-
- _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();
- Util.Info("First FBU latency: " + (now - this._timing.fbu_rt_start));
- }
- }
-
- while (this._FBU.rects > 0) {
- if (this._rfb_state !== "normal") { 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);
-
- this._onFBUReceive(this,
- {'x': this._FBU.x, 'y': this._FBU.y,
- 'width': this._FBU.width, 'height': this._FBU.height,
- 'encoding': this._FBU.encoding,
- 'encodingName': this._encNames[this._FBU.encoding]});
-
- if (!this._encNames[this._FBU.encoding]) {
- this._fail("Disconnected: unsupported 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) {
- 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++;
- Util.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++;
- Util.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._onFBUComplete(this,
- {'x': this._FBU.x, 'y': this._FBU.y,
- 'width': this._FBU.width, 'height': this._FBU.height,
- 'encoding': this._FBU.encoding,
- 'encodingName': this._encNames[this._FBU.encoding]});
-
- return true; // We finished this FBU
- },
- };
-
- Util.make_properties(RFB, [
- ['target', 'wo', 'dom'], // VNC display rendering Canvas object
- ['focusContainer', 'wo', 'dom'], // DOM element that captures keyboard input
- ['encrypt', 'rw', 'bool'], // Use TLS/SSL/wss encryption
- ['true_color', 'rw', 'bool'], // Request true color pixel data
- ['local_cursor', 'rw', 'bool'], // Request locally rendered cursor
- ['shared', 'rw', 'bool'], // Request shared mode
- ['view_only', 'rw', 'bool'], // Disable client mouse/keyboard
- ['xvp_password_sep', 'rw', 'str'], // Separator for XVP password fields
- ['disconnectTimeout', 'rw', 'int'], // Time (s) to wait for disconnection
- ['wsProtocols', 'rw', 'arr'], // Protocols to use in the WebSocket connection
- ['repeaterID', 'rw', 'str'], // [UltraVNC] RepeaterID to connect to
- ['viewportDrag', 'rw', 'bool'], // Move the viewport on mouse drags
-
- // Callback functions
- ['onUpdateState', 'rw', 'func'], // onUpdateState(rfb, state, oldstate, statusMsg): RFB state update/change
- ['onPasswordRequired', 'rw', 'func'], // onPasswordRequired(rfb): VNC password is required
- ['onClipboard', 'rw', 'func'], // onClipboard(rfb, text): RFB clipboard contents received
- ['onBell', 'rw', 'func'], // onBell(rfb): RFB Bell message received
- ['onFBUReceive', 'rw', 'func'], // onFBUReceive(rfb, fbu): RFB FBU received but not yet processed
- ['onFBUComplete', 'rw', 'func'], // onFBUComplete(rfb, fbu): RFB FBU received and processed
- ['onFBResize', 'rw', 'func'], // onFBResize(rfb, width, height): frame buffer resized
- ['onDesktopName', 'rw', 'func'], // onDesktopName(rfb, name): desktop name received
- ['onXvpInit', 'rw', 'func'], // onXvpInit(version): XVP extensions active for this connection
- ]);
-
- RFB.prototype.set_local_cursor = function (cursor) {
- if (!cursor || (cursor in {'0': 1, 'no': 1, 'false': 1})) {
- this._local_cursor = false;
- } else {
- if (this._display.get_cursor_uri()) {
- this._local_cursor = true;
- } else {
- Util.Warn("Browser does not support local cursor");
- }
- }
- };
-
- RFB.prototype.get_display = function () { return this._display; };
- RFB.prototype.get_keyboard = function () { return this._keyboard; };
- RFB.prototype.get_mouse = function () { return this._mouse; };
-
- // Class Methods
- RFB.messages = {
- keyEvent: function (keysym, down) {
- var arr = [4];
- arr.push8(down);
- arr.push16(0);
- arr.push32(keysym);
- return arr;
- },
-
- pointerEvent: function (x, y, mask) {
- var arr = [5]; // msg-type
- arr.push8(mask);
- arr.push16(x);
- arr.push16(y);
- return arr;
- },
-
- // TODO(directxman12): make this unicode compatible?
- clientCutText: function (text) {
- var arr = [6]; // msg-type
- arr.push8(0); // padding
- arr.push8(0); // padding
- arr.push8(0); // padding
- arr.push32(text.length);
- var n = text.length;
- for (var i = 0; i < n; i++) {
- arr.push(text.charCodeAt(i));
- }
-
- return arr;
- },
-
- pixelFormat: function (bpp, depth, true_color) {
- var arr = [0]; // msg-type
- arr.push8(0); // padding
- arr.push8(0); // padding
- arr.push8(0); // padding
-
- arr.push8(bpp * 8); // bits-per-pixel
- arr.push8(depth * 8); // depth
- arr.push8(0); // little-endian
- arr.push8(true_color ? 1 : 0); // true-color
-
- arr.push16(255); // red-max
- arr.push16(255); // green-max
- arr.push16(255); // blue-max
- arr.push8(16); // red-shift
- arr.push8(8); // green-shift
- arr.push8(0); // blue-shift
-
- arr.push8(0); // padding
- arr.push8(0); // padding
- arr.push8(0); // padding
- return arr;
- },
-
- clientEncodings: function (encodings, local_cursor, true_color) {
- var i, encList = [];
-
- for (i = 0; i < encodings.length; i++) {
- if (encodings[i][0] === "Cursor" && !local_cursor) {
- Util.Debug("Skipping Cursor pseudo-encoding");
- } else if (encodings[i][0] === "TIGHT" && !true_color) {
- // TODO: remove this when we have tight+non-true-color
- Util.Warn("Skipping tight as it is only supported with true color");
- } else {
- encList.push(encodings[i][1]);
- }
- }
-
- var arr = [2]; // msg-type
- arr.push8(0); // padding
-
- arr.push16(encList.length); // encoding count
- for (i = 0; i < encList.length; i++) {
- arr.push32(encList[i]);
- }
-
- return arr;
- },
-
- fbUpdateRequests: function (cleanDirty, fb_width, fb_height) {
- var arr = [];
-
- var cb = cleanDirty.cleanBox;
- var w, h;
- if (cb.w > 0 && cb.h > 0) {
- w = typeof cb.w === "undefined" ? fb_width : cb.w;
- h = typeof cb.h === "undefined" ? fb_height : cb.h;
- // Request incremental for clean box
- arr = arr.concat(RFB.messages.fbUpdateRequest(1, cb.x, cb.y, w, h));
- }
-
- for (var i = 0; i < cleanDirty.dirtyBoxes.length; i++) {
- var db = cleanDirty.dirtyBoxes[i];
- // Force all (non-incremental) for dirty box
- w = typeof db.w === "undefined" ? fb_width : db.w;
- h = typeof db.h === "undefined" ? fb_height : db.h;
- arr = arr.concat(RFB.messages.fbUpdateRequest(0, db.x, db.y, w, h));
- }
-
- return arr;
- },
-
- fbUpdateRequest: function (incremental, x, y, w, h) {
- if (typeof(x) === "undefined") { x = 0; }
- if (typeof(y) === "undefined") { y = 0; }
-
- var arr = [3]; // msg-type
- arr.push8(incremental);
- arr.push16(x);
- arr.push16(y);
- arr.push16(w);
- arr.push16(h);
-
- return arr;
- }
- };
-
- 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.extract_data_uri = function (arr) {
- return ";base64," + Base64.encode(arr);
- };
-
- RFB.encodingHandlers = {
- RAW: function () {
- if (this._FBU.lines === 0) {
- this._FBU.lines = this._FBU.height;
- }
-
- this._FBU.bytes = this._FBU.width * this._fb_Bpp; // 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 * this._fb_Bpp)));
- this._display.blitImage(this._FBU.x, cur_y, this._FBU.width,
- curr_height, this._sock.get_rQ(),
- this._sock.get_rQi());
- this._sock.rQskipBytes(this._FBU.width * curr_height * this._fb_Bpp);
- this._FBU.lines -= curr_height;
-
- if (this._FBU.lines > 0) {
- this._FBU.bytes = this._FBU.width * this._fb_Bpp; // 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.renderQ_push({
- 'type': 'copy',
- 'old_x': this._sock.rQshift16(),
- 'old_y': this._sock.rQshift16(),
- 'x': this._FBU.x,
- 'y': this._FBU.y,
- 'width': this._FBU.width,
- 'height': 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 + this._fb_Bpp;
- if (this._sock.rQwait("RRE", 4 + this._fb_Bpp)) { return false; }
- this._FBU.subrects = this._sock.rQshift32();
- color = this._sock.rQshiftBytes(this._fb_Bpp); // 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() >= (this._fb_Bpp + 8)) {
- color = this._sock.rQshiftBytes(this._fb_Bpp);
- 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 = (this._fb_Bpp + 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("Disconnected: illegal hextile 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 * this._fb_Bpp;
- } else {
- if (subencoding & 0x02) { // Background
- this._FBU.bytes += this._fb_Bpp;
- }
- if (subencoding & 0x04) { // Foreground
- this._FBU.bytes += this._fb_Bpp;
- }
- 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 * (this._fb_Bpp + 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
- Util.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.slice(rQi, rQi + this._fb_Bpp);
- rQi += this._fb_Bpp;
- }
- if (this._FBU.subencoding & 0x04) { // Foreground
- this._FBU.foreground = rQ.slice(rQi, rQi + this._fb_Bpp);
- rQi += this._fb_Bpp;
- }
-
- 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.slice(rQi, rQi + this._fb_Bpp);
- rQi += this._fb_Bpp;
- } 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;
- },
-
- getTightCLength: function (arr) {
- var header = 1, data = 0;
- data += arr[0] & 0x7f;
- if (arr[0] & 0x80) {
- header++;
- data += (arr[1] & 0x7f) << 7;
- if (arr[1] & 0x80) {
- header++;
- data += arr[2] << 14;
- }
- }
- return [header, data];
- },
-
- display_tight: function (isTightPNG) {
- if (this._fb_depth === 1) {
- this._fail("Tight protocol handler only implements true color mode");
- }
-
- 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) {
- for (var i = 0; i < 4; i++) {
- if ((resetStreams >> i) & 1) {
- this._FBU.zlibs[i].reset();
- Util.Info("Reset zlib stream " + i);
- }
- }
-
- var uncompressed = this._FBU.zlibs[streamId].uncompress(data, 0);
- if (uncompressed.status !== 0) {
- Util.Error("Invalid data in zlib stream");
- }
-
- return uncompressed.data;
- }.bind(this);
-
- var indexedToRGB = function (data, numColors, palette, width, height) {
- // Convert indexed (palette based) image data to RGB
- // TODO: reduce number of calculations inside loop
- var dest = [];
- var x, y, dp, sp;
- if (numColors === 2) {
- var w = Math.floor((width + 7) / 8);
- var w1 = Math.floor(width / 8);
-
- for (y = 0; y < height; y++) {
- var b;
- for (x = 0; x < w1; x++) {
- for (b = 7; b >= 0; b--) {
- dp = (y * width + x * 8 + 7 - b) * 3;
- sp = (data[y * w + x] >> b & 1) * 3;
- dest[dp] = palette[sp];
- dest[dp + 1] = palette[sp + 1];
- dest[dp + 2] = palette[sp + 2];
- }
- }
-
- for (b = 7; b >= 8 - width % 8; b--) {
- dp = (y * width + x * 8 + 7 - b) * 3;
- sp = (data[y * w + x] >> b & 1) * 3;
- dest[dp] = palette[sp];
- dest[dp + 1] = palette[sp + 1];
- dest[dp + 2] = palette[sp + 2];
- }
- }
- } else {
- for (y = 0; y < height; y++) {
- for (x = 0; x < width; x++) {
- dp = (y * width + x) * 3;
- sp = data[y * width + x] * 3;
- dest[dp] = palette[sp];
- dest[dp + 1] = palette[sp + 1];
- dest[dp + 2] = palette[sp + 2];
- }
- }
- }
-
- return dest;
- }.bind(this);
-
- var rQ = this._sock.get_rQ();
- var rQi = this._sock.get_rQi();
- var cmode, clength, data;
-
- var handlePalette = function () {
- var numColors = rQ[rQi + 2] + 1;
- var paletteSize = numColors * this._fb_depth;
- 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;
- clength = [0, rowSize * this._FBU.height];
- } else {
- clength = RFB.encodingHandlers.getTightCLength(this._sock.rQslice(3 + paletteSize,
- 3 + paletteSize + 3));
- }
-
- this._FBU.bytes += clength[0] + clength[1];
- 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.rQskipBytes(clength[0]);
-
- if (raw) {
- data = this._sock.rQshiftBytes(clength[1]);
- } else {
- data = decompress(this._sock.rQshiftBytes(clength[1]));
- }
-
- // Convert indexed (palette based) image data to RGB
- var rgb = indexedToRGB(data, numColors, palette, this._FBU.width, this._FBU.height);
-
- this._display.renderQ_push({
- 'type': 'blitRgb',
- 'data': rgb,
- 'x': this._FBU.x,
- 'y': this._FBU.y,
- 'width': this._FBU.width,
- 'height': this._FBU.height
- });
-
- return true;
- }.bind(this);
-
- var handleCopy = function () {
- var raw = false;
- var uncompressedSize = this._FBU.width * this._FBU.height * this._fb_depth;
- if (uncompressedSize < 12) {
- raw = true;
- clength = [0, uncompressedSize];
- } else {
- clength = RFB.encodingHandlers.getTightCLength(this._sock.rQslice(1, 4));
- }
- this._FBU.bytes = 1 + clength[0] + clength[1];
- if (this._sock.rQwait("TIGHT " + cmode, this._FBU.bytes)) { return false; }
-
- // Shift ctl, clength off
- this._sock.rQshiftBytes(1 + clength[0]);
-
- if (raw) {
- data = this._sock.rQshiftBytes(clength[1]);
- } else {
- data = decompress(this._sock.rQshiftBytes(clength[1]));
- }
-
- this._display.renderQ_push({
- 'type': 'blitRgb',
- 'data': data,
- 'x': this._FBU.x,
- 'y': this._FBU.y,
- 'width': this._FBU.width,
- 'height': this._FBU.height
- });
-
- 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);
-
- if (isTightPNG && (cmode === "filter" || cmode === "copy")) {
- return this._fail("filter/copy received in tightPNG mode");
- }
-
- switch (cmode) {
- // fill use fb_depth because TPIXELs drop the padding byte
- case "fill": // TPIXEL
- this._FBU.bytes += this._fb_depth;
- 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":
- this._sock.rQskip8(); // shift off ctl
- var color = this._sock.rQshiftBytes(this._fb_depth);
- this._display.renderQ_push({
- 'type': 'fill',
- 'x': this._FBU.x,
- 'y': this._FBU.y,
- 'width': this._FBU.width,
- 'height': this._FBU.height,
- 'color': [color[2], color[1], color[0]]
- });
- break;
- case "png":
- case "jpeg":
- clength = RFB.encodingHandlers.getTightCLength(this._sock.rQslice(1, 4));
- this._FBU.bytes = 1 + clength[0] + clength[1]; // 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 + clength[0]); // shift off clt + compact length
- var img = new Image();
- img.src = "data: image/" + cmode +
- RFB.extract_data_uri(this._sock.rQshiftBytes(clength[1]));
- this._display.renderQ_push({
- 'type': 'img',
- 'img': img,
- 'x': this._FBU.x,
- 'y': this._FBU.y
- });
- img = null;
- 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
- // TODO(directxman12): why aren't we just calling '_fail' here
- throw new Error("Unsupported tight subencoding received, filter: " + filterId);
- }
- break;
- case "copy":
- if (!handleCopy()) { return false; }
- break;
- }
-
-
- this._FBU.bytes = 0;
- this._FBU.rects--;
-
- return true;
- },
-
- TIGHT: function () { return this._encHandlers.display_tight(false); },
- TIGHT_PNG: function () { return this._encHandlers.display_tight(true); },
-
- last_rect: function () {
- this._FBU.rects = 0;
- return true;
- },
-
- DesktopSize: function () {
- Util.Debug(">> set_desktopsize");
- this._fb_width = this._FBU.width;
- this._fb_height = this._FBU.height;
- this._onFBResize(this, this._fb_width, this._fb_height);
- this._display.resize(this._fb_width, this._fb_height);
- this._timing.fbu_rt_start = (new Date()).getTime();
-
- this._FBU.bytes = 0;
- this._FBU.rects--;
-
- Util.Debug("<< set_desktopsize");
- return true;
- },
-
- Cursor: function () {
- Util.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 * this._fb_Bpp;
- 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--;
-
- Util.Debug("<< set_cursor");
- return true;
- },
-
- JPEG_quality_lo: function () {
- Util.Error("Server sent jpeg_quality pseudo-encoding");
- },
-
- compress_lo: function () {
- Util.Error("Server sent compress level pseudo-encoding");
- }
- };
-})();
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-03 19:05:22 +0000