2 * noVNC: HTML5 VNC client
3 * Copyright (C) 2012 Joel Martin
4 * Copyright (C) 2016 Samuel Mannehed for Cendio AB
5 * Licensed under MPL 2.0 (see LICENSE.txt)
7 * See README.md for usage and integration instructions.
9 * TIGHT decoder portion:
10 * (c) 2012 Michael Tinglof, Joe Balaz, Les Piech (Mercuri.ca)
13 import * as Log
from './util/logging.js';
14 import _
from './util/localization.js';
15 import { decodeUTF8
} from './util/strings.js';
16 import { set_defaults
, make_properties
} from './util/properties.js';
17 import Display
from "./display.js";
18 import { Keyboard
, Mouse
} from "./input/devices.js";
19 import Websock
from "./websock.js";
20 import Base64
from "./base64.js";
21 import DES
from "./des.js";
22 import KeyTable
from "./input/keysym.js";
23 import XtScancode
from "./input/xtscancodes.js";
24 import Inflator
from "./inflator.js";
26 /*jslint white: false, browser: true */
27 /*global window, Util, Display, Keyboard, Mouse, Websock, Websock_native, Base64, DES, KeyTable, Inflator, XtScancode */
29 export default function RFB(defaults
) {
36 this._rfb_port
= 5900;
37 this._rfb_password
= '';
40 this._rfb_connection_state
= '';
41 this._rfb_init_state
= '';
42 this._rfb_version
= 0;
43 this._rfb_max_version
= 3.8;
44 this._rfb_auth_scheme
= '';
45 this._rfb_disconnect_reason
= "";
47 this._rfb_tightvnc
= false;
48 this._rfb_xvp_ver
= 0;
50 // In preference order
59 // Psuedo-encoding settings
61 //['JPEG_quality_lo', -32 ],
62 ['JPEG_quality_med', -26 ],
63 //['JPEG_quality_hi', -23 ],
64 //['compress_lo', -255 ],
65 ['compress_hi', -254 ],
66 //['compress_max', -247 ],
68 ['DesktopSize', -223 ],
71 ['QEMUExtendedKeyEvent', -258 ],
72 ['ExtendedDesktopSize', -308 ],
75 ['ContinuousUpdates', -313 ]
78 this._encHandlers
= {};
82 this._sock
= null; // Websock object
83 this._display
= null; // Display object
84 this._flushing
= false; // Display flushing state
85 this._keyboard
= null; // Keyboard input handler object
86 this._mouse
= null; // Mouse input handler object
87 this._disconnTimer
= null; // disconnection timer
89 this._supportsFence
= false;
91 this._supportsContinuousUpdates
= false;
92 this._enabledContinuousUpdates
= false;
94 // Frame buffer update state
108 zlib
: [] // TIGHT zlib streams
115 this._destBuff
= null;
116 this._paletteBuff
= new Uint8Array(1024); // 256 * 4 (max palette size * max bytes-per-pixel)
118 this._rre_chunk_sz
= 100;
133 this._supportsSetDesktopSize
= false;
135 this._screen_flags
= 0;
138 this._mouse_buttonMask
= 0;
139 this._mouse_arr
= [];
140 this._viewportDragging
= false;
141 this._viewportDragPos
= {};
142 this._viewportHasMoved
= false;
144 // QEMU Extended Key Event support - default to false
145 this._qemuExtKeyEventSupported
= false;
147 // set the default value on user-facing properties
148 set_defaults(this, defaults
, {
149 'target': 'null', // VNC display rendering Canvas object
150 'focusContainer': document
, // DOM element that captures keyboard input
151 'encrypt': false, // Use TLS/SSL/wss encryption
152 'local_cursor': false, // Request locally rendered cursor
153 'shared': true, // Request shared mode
154 'view_only': false, // Disable client mouse/keyboard
155 'xvp_password_sep': '@', // Separator for XVP password fields
156 'disconnectTimeout': 3, // Time (s) to wait for disconnection
157 'wsProtocols': ['binary'], // Protocols to use in the WebSocket connection
158 'repeaterID': '', // [UltraVNC] RepeaterID to connect to
159 'viewportDrag': false, // Move the viewport on mouse drags
161 // Callback functions
162 'onUpdateState': function () { }, // onUpdateState(rfb, state, oldstate): connection state change
163 'onNotification': function () { }, // onNotification(rfb, msg, level, options): notification for UI
164 'onDisconnected': function () { }, // onDisconnected(rfb, reason): disconnection finished
165 'onPasswordRequired': function () { }, // onPasswordRequired(rfb, msg): VNC password is required
166 'onClipboard': function () { }, // onClipboard(rfb, text): RFB clipboard contents received
167 'onBell': function () { }, // onBell(rfb): RFB Bell message received
168 'onFBUReceive': function () { }, // onFBUReceive(rfb, fbu): RFB FBU received but not yet processed
169 'onFBUComplete': function () { }, // onFBUComplete(rfb, fbu): RFB FBU received and processed
170 'onFBResize': function () { }, // onFBResize(rfb, width, height): frame buffer resized
171 'onDesktopName': function () { }, // onDesktopName(rfb, name): desktop name received
172 'onXvpInit': function () { } // onXvpInit(version): XVP extensions active for this connection
176 Log
.Debug(">> RFB.constructor");
178 // populate encHandlers with bound versions
179 Object
.keys(RFB
.encodingHandlers
).forEach(function (encName
) {
180 this._encHandlers
[encName
] = RFB
.encodingHandlers
[encName
].bind(this);
183 // Create lookup tables based on encoding number
184 for (var i
= 0; i
< this._encodings
.length
; i
++) {
185 this._encHandlers
[this._encodings
[i
][1]] = this._encHandlers
[this._encodings
[i
][0]];
186 this._encNames
[this._encodings
[i
][1]] = this._encodings
[i
][0];
187 this._encStats
[this._encodings
[i
][1]] = [0, 0];
190 // NB: nothing that needs explicit teardown should be done
191 // before this point, since this can throw an exception
193 this._display
= new Display({target
: this._target
,
194 onFlush
: this._onFlush
.bind(this)});
196 Log
.Error("Display exception: " + exc
);
200 this._keyboard
= new Keyboard({target
: this._focusContainer
,
201 onKeyEvent
: this._handleKeyEvent
.bind(this)});
203 this._mouse
= new Mouse({target
: this._target
,
204 onMouseButton
: this._handleMouseButton
.bind(this),
205 onMouseMove
: this._handleMouseMove
.bind(this)});
207 this._sock
= new Websock();
208 this._sock
.on('message', this._handle_message
.bind(this));
209 this._sock
.on('open', function () {
210 if ((this._rfb_connection_state
=== 'connecting') &&
211 (this._rfb_init_state
=== '')) {
212 this._rfb_init_state
= 'ProtocolVersion';
213 Log
.Debug("Starting VNC handshake");
215 this._fail("Unexpected server connection");
218 this._sock
.on('close', function (e
) {
219 Log
.Warn("WebSocket on-close event");
222 msg
= " (code: " + e
.code
;
224 msg
+= ", reason: " + e
.reason
;
228 switch (this._rfb_connection_state
) {
229 case 'disconnecting':
230 this._updateConnectionState('disconnected');
233 this._fail('Failed to connect to server', msg
);
236 // Handle disconnects that were initiated server-side
237 this._updateConnectionState('disconnecting');
238 this._updateConnectionState('disconnected');
241 this._fail("Unexpected server disconnect",
242 "Already disconnected: " + msg
);
245 this._fail("Unexpected server disconnect",
246 "Not in any state yet: " + msg
);
249 this._sock
.off('close');
251 this._sock
.on('error', function (e
) {
252 Log
.Warn("WebSocket on-error event");
258 var rmode
= this._display
.get_render_mode();
259 Log
.Info("Using native WebSockets, render mode: " + rmode
);
261 Log
.Debug("<< RFB.constructor");
266 connect: function (host
, port
, password
, path
) {
267 this._rfb_host
= host
;
268 this._rfb_port
= port
;
269 this._rfb_password
= (password
!== undefined) ? password
: "";
270 this._rfb_path
= (path
!== undefined) ? path
: "";
272 if (!this._rfb_host
|| !this._rfb_port
) {
274 _("Must set host and port"));
277 this._rfb_init_state
= '';
278 this._updateConnectionState('connecting');
282 disconnect: function () {
283 this._updateConnectionState('disconnecting');
284 this._sock
.off('error');
285 this._sock
.off('message');
286 this._sock
.off('open');
289 sendPassword: function (passwd
) {
290 this._rfb_password
= passwd
;
291 setTimeout(this._init_msg
.bind(this), 0);
294 sendCtrlAltDel: function () {
295 if (this._rfb_connection_state
!== 'connected' || this._view_only
) { return false; }
296 Log
.Info("Sending Ctrl-Alt-Del");
298 this.sendKey(KeyTable
.XK_Control_L
, "ControlLeft", true);
299 this.sendKey(KeyTable
.XK_Alt_L
, "AltLeft", true);
300 this.sendKey(KeyTable
.XK_Delete
, "Delete", true);
301 this.sendKey(KeyTable
.XK_Delete
, "Delete", false);
302 this.sendKey(KeyTable
.XK_Alt_L
, "AltLeft", false);
303 this.sendKey(KeyTable
.XK_Control_L
, "ControlLeft", false);
308 xvpOp: function (ver
, op
) {
309 if (this._rfb_xvp_ver
< ver
) { return false; }
310 Log
.Info("Sending XVP operation " + op
+ " (version " + ver
+ ")");
311 this._sock
.send_string("\xFA\x00" + String
.fromCharCode(ver
) + String
.fromCharCode(op
));
315 xvpShutdown: function () {
316 return this.xvpOp(1, 2);
319 xvpReboot: function () {
320 return this.xvpOp(1, 3);
323 xvpReset: function () {
324 return this.xvpOp(1, 4);
327 // Send a key press. If 'down' is not specified then send a down key
328 // followed by an up key.
329 sendKey: function (keysym
, code
, down
) {
330 if (this._rfb_connection_state
!== 'connected' || this._view_only
) { return false; }
332 if (down
=== undefined) {
333 this.sendKey(keysym
, code
, true);
334 this.sendKey(keysym
, code
, false);
338 var scancode
= XtScancode
[code
];
340 if (this._qemuExtKeyEventSupported
&& scancode
) {
342 keysym
= keysym
|| 0;
344 Log
.Info("Sending key (" + (down
? "down" : "up") + "): keysym " + keysym
+ ", scancode " + scancode
);
346 RFB
.messages
.QEMUExtendedKeyEvent(this._sock
, keysym
, down
, scancode
);
351 Log
.Info("Sending keysym (" + (down
? "down" : "up") + "): " + keysym
);
352 RFB
.messages
.keyEvent(this._sock
, keysym
, down
? 1 : 0);
358 clipboardPasteFrom: function (text
) {
359 if (this._rfb_connection_state
!== 'connected' || this._view_only
) { return; }
360 RFB
.messages
.clientCutText(this._sock
, text
);
363 // Requests a change of remote desktop size. This message is an extension
364 // and may only be sent if we have received an ExtendedDesktopSize message
365 requestDesktopSize: function (width
, height
) {
366 if (this._rfb_connection_state
!== 'connected' ||
371 if (this._supportsSetDesktopSize
) {
372 RFB
.messages
.setDesktopSize(this._sock
, width
, height
,
373 this._screen_id
, this._screen_flags
);
384 _connect: function () {
385 Log
.Debug(">> RFB.connect");
389 if (typeof UsingSocketIO
!== 'undefined') {
392 uri
= this._encrypt
? 'wss' : 'ws';
395 uri
+= '://' + this._rfb_host
+ ':' + this._rfb_port
+ '/' + this._rfb_path
;
396 Log
.Info("connecting to " + uri
);
399 // WebSocket.onopen transitions to the RFB init states
400 this._sock
.open(uri
, this._wsProtocols
);
402 if (e
.name
=== 'SyntaxError') {
403 this._fail("Invalid host or port value given", e
);
405 this._fail("Error while connecting", e
);
409 Log
.Debug("<< RFB.connect");
412 _disconnect: function () {
413 Log
.Debug(">> RFB.disconnect");
417 Log
.Debug("<< RFB.disconnect");
420 _init_vars: function () {
423 this._FBU
.subrects
= 0; // RRE and HEXTILE
424 this._FBU
.lines
= 0; // RAW
425 this._FBU
.tiles
= 0; // HEXTILE
426 this._FBU
.zlibs
= []; // TIGHT zlib encoders
427 this._mouse_buttonMask
= 0;
428 this._mouse_arr
= [];
429 this._rfb_tightvnc
= false;
431 // Clear the per connection encoding stats
433 for (i
= 0; i
< this._encodings
.length
; i
++) {
434 this._encStats
[this._encodings
[i
][1]][0] = 0;
437 for (i
= 0; i
< 4; i
++) {
438 this._FBU
.zlibs
[i
] = new Inflator();
442 _print_stats: function () {
443 Log
.Info("Encoding stats for this connection:");
445 for (i
= 0; i
< this._encodings
.length
; i
++) {
446 s
= this._encStats
[this._encodings
[i
][1]];
447 if (s
[0] + s
[1] > 0) {
448 Log
.Info(" " + this._encodings
[i
][0] + ": " + s
[0] + " rects");
452 Log
.Info("Encoding stats since page load:");
453 for (i
= 0; i
< this._encodings
.length
; i
++) {
454 s
= this._encStats
[this._encodings
[i
][1]];
455 Log
.Info(" " + this._encodings
[i
][0] + ": " + s
[1] + " rects");
459 _cleanup: function () {
460 if (!this._view_only
) { this._keyboard
.ungrab(); }
461 if (!this._view_only
) { this._mouse
.ungrab(); }
462 this._display
.defaultCursor();
463 if (Log
.get_logging() !== 'debug') {
464 // Show noVNC logo on load and when disconnected, unless in
466 this._display
.clear();
475 * disconnected - permanent state
477 _updateConnectionState: function (state
) {
478 var oldstate
= this._rfb_connection_state
;
480 if (state
=== oldstate
) {
481 Log
.Debug("Already in state '" + state
+ "', ignoring");
485 // The 'disconnected' state is permanent for each RFB object
486 if (oldstate
=== 'disconnected') {
487 Log
.Error("Tried changing state of a disconnected RFB object");
491 // Ensure proper transitions before doing anything
494 if (oldstate
!== 'connecting') {
495 Log
.Error("Bad transition to connected state, " +
496 "previous connection state: " + oldstate
);
502 if (oldstate
!== 'disconnecting') {
503 Log
.Error("Bad transition to disconnected state, " +
504 "previous connection state: " + oldstate
);
510 if (oldstate
!== '') {
511 Log
.Error("Bad transition to connecting state, " +
512 "previous connection state: " + oldstate
);
517 case 'disconnecting':
518 if (oldstate
!== 'connected' && oldstate
!== 'connecting') {
519 Log
.Error("Bad transition to disconnecting state, " +
520 "previous connection state: " + oldstate
);
526 Log
.Error("Unknown connection state: " + state
);
530 // State change actions
532 this._rfb_connection_state
= state
;
533 this._onUpdateState(this, state
, oldstate
);
535 var smsg
= "New state '" + state
+ "', was '" + oldstate
+ "'.";
538 if (this._disconnTimer
&& state
!== 'disconnecting') {
539 Log
.Debug("Clearing disconnect timer");
540 clearTimeout(this._disconnTimer
);
541 this._disconnTimer
= null;
543 // make sure we don't get a double event
544 this._sock
.off('close');
549 // Call onDisconnected callback after onUpdateState since
550 // we don't know if the UI only displays the latest message
551 if (this._rfb_disconnect_reason
!== "") {
552 this._onDisconnected(this, this._rfb_disconnect_reason
);
554 // No reason means clean disconnect
555 this._onDisconnected(this);
563 case 'disconnecting':
566 this._disconnTimer
= setTimeout(function () {
567 this._rfb_disconnect_reason
= _("Disconnect timeout");
568 this._updateConnectionState('disconnected');
569 }.bind(this), this._disconnectTimeout
* 1000);
574 /* Print errors and disconnect
576 * The optional parameter 'details' is used for information that
577 * should be logged but not sent to the user interface.
579 _fail: function (msg
, details
) {
581 if (typeof details
!== 'undefined') {
582 fullmsg
= msg
+ " (" + details
+ ")";
584 switch (this._rfb_connection_state
) {
585 case 'disconnecting':
586 Log
.Error("Failed when disconnecting: " + fullmsg
);
589 Log
.Error("Failed while connected: " + fullmsg
);
592 Log
.Error("Failed when connecting: " + fullmsg
);
595 Log
.Error("RFB failure: " + fullmsg
);
598 this._rfb_disconnect_reason
= msg
; //This is sent to the UI
600 // Transition to disconnected without waiting for socket to close
601 this._updateConnectionState('disconnecting');
602 this._updateConnectionState('disconnected');
608 * Send a notification to the UI. Valid levels are:
609 * 'normal'|'warn'|'error'
611 * NOTE: Options could be added in the future.
612 * NOTE: If this function is called multiple times, remember that the
613 * interface could be only showing the latest notification.
615 _notification: function(msg
, level
, options
) {
620 Log
.Debug("Notification[" + level
+ "]:" + msg
);
623 Log
.Error("Invalid notification level: " + level
);
628 this._onNotification(this, msg
, level
, options
);
630 this._onNotification(this, msg
, level
);
634 _handle_message: function () {
635 if (this._sock
.rQlen() === 0) {
636 Log
.Warn("handle_message called on an empty receive queue");
640 switch (this._rfb_connection_state
) {
642 Log
.Error("Got data while disconnected");
646 if (this._flushing
) {
649 if (!this._normal_msg()) {
652 if (this._sock
.rQlen() === 0) {
663 _handleKeyEvent: function (keysym
, code
, down
) {
664 this.sendKey(keysym
, code
, down
);
667 _handleMouseButton: function (x
, y
, down
, bmask
) {
669 this._mouse_buttonMask
|= bmask
;
671 this._mouse_buttonMask
&= ~bmask
;
674 if (this._viewportDrag
) {
675 if (down
&& !this._viewportDragging
) {
676 this._viewportDragging
= true;
677 this._viewportDragPos
= {'x': x
, 'y': y
};
679 // Skip sending mouse events
682 this._viewportDragging
= false;
684 // If the viewport didn't actually move, then treat as a mouse click event
685 // Send the button down event here, as the button up event is sent at the end of this function
686 if (!this._viewportHasMoved
&& !this._view_only
) {
687 RFB
.messages
.pointerEvent(this._sock
, this._display
.absX(x
), this._display
.absY(y
), bmask
);
689 this._viewportHasMoved
= false;
693 if (this._view_only
) { return; } // View only, skip mouse events
695 if (this._rfb_connection_state
!== 'connected') { return; }
696 RFB
.messages
.pointerEvent(this._sock
, this._display
.absX(x
), this._display
.absY(y
), this._mouse_buttonMask
);
699 _handleMouseMove: function (x
, y
) {
700 if (this._viewportDragging
) {
701 var deltaX
= this._viewportDragPos
.x
- x
;
702 var deltaY
= this._viewportDragPos
.y
- y
;
704 // The goal is to trigger on a certain physical width, the
705 // devicePixelRatio brings us a bit closer but is not optimal.
706 var dragThreshold
= 10 * (window
.devicePixelRatio
|| 1);
708 if (this._viewportHasMoved
|| (Math
.abs(deltaX
) > dragThreshold
||
709 Math
.abs(deltaY
) > dragThreshold
)) {
710 this._viewportHasMoved
= true;
712 this._viewportDragPos
= {'x': x
, 'y': y
};
713 this._display
.viewportChangePos(deltaX
, deltaY
);
716 // Skip sending mouse events
720 if (this._view_only
) { return; } // View only, skip mouse events
722 if (this._rfb_connection_state
!== 'connected') { return; }
723 RFB
.messages
.pointerEvent(this._sock
, this._display
.absX(x
), this._display
.absY(y
), this._mouse_buttonMask
);
728 _negotiate_protocol_version: function () {
729 if (this._sock
.rQlen() < 12) {
730 return this._fail("Error while negotiating with server",
731 "Incomplete protocol version");
734 var sversion
= this._sock
.rQshiftStr(12).substr(4, 7);
735 Log
.Info("Server ProtocolVersion: " + sversion
);
738 case "000.000": // UltraVNC repeater
742 case "003.006": // UltraVNC
743 case "003.889": // Apple Remote Desktop
744 this._rfb_version
= 3.3;
747 this._rfb_version
= 3.7;
750 case "004.000": // Intel AMT KVM
751 case "004.001": // RealVNC 4.6
752 case "005.000": // RealVNC 5.3
753 this._rfb_version
= 3.8;
756 return this._fail("Unsupported server",
757 "Invalid server version: " + sversion
);
761 var repeaterID
= this._repeaterID
;
762 while (repeaterID
.length
< 250) {
765 this._sock
.send_string(repeaterID
);
769 if (this._rfb_version
> this._rfb_max_version
) {
770 this._rfb_version
= this._rfb_max_version
;
773 var cversion
= "00" + parseInt(this._rfb_version
, 10) +
774 ".00" + ((this._rfb_version
* 10) % 10);
775 this._sock
.send_string("RFB " + cversion
+ "\n");
776 Log
.Debug('Sent ProtocolVersion: ' + cversion
);
778 this._rfb_init_state
= 'Security';
781 _negotiate_security: function () {
782 // Polyfill since IE and PhantomJS doesn't have
783 // TypedArray.includes()
784 function includes(item
, array
) {
785 for (var i
= 0; i
< array
.length
; i
++) {
786 if (array
[i
] === item
) {
793 if (this._rfb_version
>= 3.7) {
794 // Server sends supported list, client decides
795 var num_types
= this._sock
.rQshift8();
796 if (this._sock
.rQwait("security type", num_types
, 1)) { return false; }
798 if (num_types
=== 0) {
799 var strlen
= this._sock
.rQshift32();
800 var reason
= this._sock
.rQshiftStr(strlen
);
801 return this._fail("Error while negotiating with server",
802 "Security failure: " + reason
);
805 var types
= this._sock
.rQshiftBytes(num_types
);
806 Log
.Debug("Server security types: " + types
);
808 // Look for each auth in preferred order
809 this._rfb_auth_scheme
= 0;
810 if (includes(1, types
)) {
811 this._rfb_auth_scheme
= 1; // None
812 } else if (includes(22, types
)) {
813 this._rfb_auth_scheme
= 22; // XVP
814 } else if (includes(16, types
)) {
815 this._rfb_auth_scheme
= 16; // Tight
816 } else if (includes(2, types
)) {
817 this._rfb_auth_scheme
= 2; // VNC Auth
819 return this._fail("Unsupported server",
820 "Unsupported security types: " + types
);
823 this._sock
.send([this._rfb_auth_scheme
]);
826 if (this._sock
.rQwait("security scheme", 4)) { return false; }
827 this._rfb_auth_scheme
= this._sock
.rQshift32();
830 this._rfb_init_state
= 'Authentication';
831 Log
.Debug('Authenticating using scheme: ' + this._rfb_auth_scheme
);
833 return this._init_msg(); // jump to authentication
837 _negotiate_xvp_auth: function () {
838 var xvp_sep
= this._xvp_password_sep
;
839 var xvp_auth
= this._rfb_password
.split(xvp_sep
);
840 if (xvp_auth
.length
< 3) {
841 var msg
= 'XVP credentials required (user' + xvp_sep
+
842 'target' + xvp_sep
+ 'password) -- got only ' + this._rfb_password
;
843 this._onPasswordRequired(this, msg
);
847 var xvp_auth_str
= String
.fromCharCode(xvp_auth
[0].length
) +
848 String
.fromCharCode(xvp_auth
[1].length
) +
851 this._sock
.send_string(xvp_auth_str
);
852 this._rfb_password
= xvp_auth
.slice(2).join(xvp_sep
);
853 this._rfb_auth_scheme
= 2;
854 return this._negotiate_authentication();
857 _negotiate_std_vnc_auth: function () {
858 if (this._rfb_password
.length
=== 0) {
859 this._onPasswordRequired(this);
863 if (this._sock
.rQwait("auth challenge", 16)) { return false; }
865 // TODO(directxman12): make genDES not require an Array
866 var challenge
= Array
.prototype.slice
.call(this._sock
.rQshiftBytes(16));
867 var response
= RFB
.genDES(this._rfb_password
, challenge
);
868 this._sock
.send(response
);
869 this._rfb_init_state
= "SecurityResult";
873 _negotiate_tight_tunnels: function (numTunnels
) {
874 var clientSupportedTunnelTypes
= {
875 0: { vendor
: 'TGHT', signature
: 'NOTUNNEL' }
877 var serverSupportedTunnelTypes
= {};
878 // receive tunnel capabilities
879 for (var i
= 0; i
< numTunnels
; i
++) {
880 var cap_code
= this._sock
.rQshift32();
881 var cap_vendor
= this._sock
.rQshiftStr(4);
882 var cap_signature
= this._sock
.rQshiftStr(8);
883 serverSupportedTunnelTypes
[cap_code
] = { vendor
: cap_vendor
, signature
: cap_signature
};
886 // choose the notunnel type
887 if (serverSupportedTunnelTypes
[0]) {
888 if (serverSupportedTunnelTypes
[0].vendor
!= clientSupportedTunnelTypes
[0].vendor
||
889 serverSupportedTunnelTypes
[0].signature
!= clientSupportedTunnelTypes
[0].signature
) {
890 return this._fail("Unsupported server",
891 "Client's tunnel type had the incorrect " +
892 "vendor or signature");
894 this._sock
.send([0, 0, 0, 0]); // use NOTUNNEL
895 return false; // wait until we receive the sub auth count to continue
897 return this._fail("Unsupported server",
898 "Server wanted tunnels, but doesn't support " +
899 "the notunnel type");
903 _negotiate_tight_auth: function () {
904 if (!this._rfb_tightvnc
) { // first pass, do the tunnel negotiation
905 if (this._sock
.rQwait("num tunnels", 4)) { return false; }
906 var numTunnels
= this._sock
.rQshift32();
907 if (numTunnels
> 0 && this._sock
.rQwait("tunnel capabilities", 16 * numTunnels
, 4)) { return false; }
909 this._rfb_tightvnc
= true;
911 if (numTunnels
> 0) {
912 this._negotiate_tight_tunnels(numTunnels
);
913 return false; // wait until we receive the sub auth to continue
917 // second pass, do the sub-auth negotiation
918 if (this._sock
.rQwait("sub auth count", 4)) { return false; }
919 var subAuthCount
= this._sock
.rQshift32();
920 if (subAuthCount
=== 0) { // empty sub-auth list received means 'no auth' subtype selected
921 this._rfb_init_state
= 'SecurityResult';
925 if (this._sock
.rQwait("sub auth capabilities", 16 * subAuthCount
, 4)) { return false; }
927 var clientSupportedTypes
= {
932 var serverSupportedTypes
= [];
934 for (var i
= 0; i
< subAuthCount
; i
++) {
935 var capNum
= this._sock
.rQshift32();
936 var capabilities
= this._sock
.rQshiftStr(12);
937 serverSupportedTypes
.push(capabilities
);
940 for (var authType
in clientSupportedTypes
) {
941 if (serverSupportedTypes
.indexOf(authType
) != -1) {
942 this._sock
.send([0, 0, 0, clientSupportedTypes
[authType
]]);
945 case 'STDVNOAUTH__': // no auth
946 this._rfb_init_state
= 'SecurityResult';
948 case 'STDVVNCAUTH_': // VNC auth
949 this._rfb_auth_scheme
= 2;
950 return this._init_msg();
952 return this._fail("Unsupported server",
953 "Unsupported tiny auth scheme: " +
959 return this._fail("Unsupported server",
960 "No supported sub-auth types!");
963 _negotiate_authentication: function () {
964 switch (this._rfb_auth_scheme
) {
965 case 0: // connection failed
966 if (this._sock
.rQwait("auth reason", 4)) { return false; }
967 var strlen
= this._sock
.rQshift32();
968 var reason
= this._sock
.rQshiftStr(strlen
);
969 return this._fail("Authentication failure", reason
);
972 if (this._rfb_version
>= 3.8) {
973 this._rfb_init_state
= 'SecurityResult';
976 this._rfb_init_state
= 'ClientInitialisation';
977 return this._init_msg();
980 return this._negotiate_xvp_auth();
982 case 2: // VNC authentication
983 return this._negotiate_std_vnc_auth();
985 case 16: // TightVNC Security Type
986 return this._negotiate_tight_auth();
989 return this._fail("Unsupported server",
990 "Unsupported auth scheme: " +
991 this._rfb_auth_scheme
);
995 _handle_security_result: function () {
996 if (this._sock
.rQwait('VNC auth response ', 4)) { return false; }
997 switch (this._sock
.rQshift32()) {
999 this._rfb_init_state
= 'ClientInitialisation';
1000 Log
.Debug('Authentication OK');
1001 return this._init_msg();
1003 if (this._rfb_version
>= 3.8) {
1004 var length
= this._sock
.rQshift32();
1005 if (this._sock
.rQwait("SecurityResult reason", length
, 8)) { return false; }
1006 var reason
= this._sock
.rQshiftStr(length
);
1007 return this._fail("Authentication failure", reason
);
1009 return this._fail("Authentication failure");
1012 return this._fail("Too many authentication attempts");
1014 return this._fail("Unsupported server",
1015 "Unknown SecurityResult");
1019 _negotiate_server_init: function () {
1020 if (this._sock
.rQwait("server initialization", 24)) { return false; }
1023 var width
= this._sock
.rQshift16();
1024 var height
= this._sock
.rQshift16();
1027 var bpp
= this._sock
.rQshift8();
1028 var depth
= this._sock
.rQshift8();
1029 var big_endian
= this._sock
.rQshift8();
1030 var true_color
= this._sock
.rQshift8();
1032 var red_max
= this._sock
.rQshift16();
1033 var green_max
= this._sock
.rQshift16();
1034 var blue_max
= this._sock
.rQshift16();
1035 var red_shift
= this._sock
.rQshift8();
1036 var green_shift
= this._sock
.rQshift8();
1037 var blue_shift
= this._sock
.rQshift8();
1038 this._sock
.rQskipBytes(3); // padding
1040 // NB(directxman12): we don't want to call any callbacks or print messages until
1041 // *after* we're past the point where we could backtrack
1043 /* Connection name/title */
1044 var name_length = this._sock.rQshift32();
1045 if (this._sock.rQwait('server init name', name_length, 24)) { return false; }
1046 this._fb_name = decodeUTF8(this._sock.rQshiftStr(name_length));
1048 if (this._rfb_tightvnc) {
1049 if (this._sock.rQwait('TightVNC extended server init header', 8, 24 + name_length)) { return false; }
1050 // In TightVNC mode, ServerInit message is extended
1051 var numServerMessages = this._sock.rQshift16();
1052 var numClientMessages = this._sock.rQshift16();
1053 var numEncodings = this._sock.rQshift16();
1054 this._sock.rQskipBytes(2); // padding
1056 var totalMessagesLength = (numServerMessages + numClientMessages + numEncodings) * 16;
1057 if (this._sock.rQwait('TightVNC extended server init header', totalMessagesLength, 32 + name_length)) { return false; }
1059 // we don't actually do anything with the capability information that TIGHT sends,
1060 // so we just skip the all of this.
1062 // TIGHT server message capabilities
1063 this._sock.rQskipBytes(16 * numServerMessages);
1065 // TIGHT client message capabilities
1066 this._sock.rQskipBytes(16 * numClientMessages);
1068 // TIGHT encoding capabilities
1069 this._sock.rQskipBytes(16 * numEncodings);
1072 // NB(directxman12): these are down here so that we don't run them multiple times
1074 Log.Info("Screen: " + width + "x" + height +
1075 ", bpp: " + bpp + ", depth: " + depth +
1076 ", big_endian: " + big_endian +
1077 ", true_color: " + true_color +
1078 ", red_max: " + red_max +
1079 ", green_max: " + green_max +
1080 ", blue_max: " + blue_max +
1081 ", red_shift: " + red_shift +
1082 ", green_shift: " + green_shift +
1083 ", blue_shift: " + blue_shift);
1085 if (big_endian !== 0) {
1086 Log.Warn("Server native endian is not little endian");
1089 if (red_shift !== 16) {
1090 Log.Warn("Server native red-shift is not 16");
1093 if (blue_shift !== 0) {
1094 Log.Warn("Server native blue-shift is not 0");
1097 // we're past the point where we could backtrack, so it's safe to call this
1098 this._onDesktopName(this, this._fb_name);
1100 this._resize(width, height);
1102 if (!this._view_only) { this._keyboard.grab(); }
1103 if (!this._view_only) { this._mouse.grab(); }
1105 RFB.messages.pixelFormat(this._sock, 4, 3, true);
1106 RFB.messages.clientEncodings(this._sock, this._encodings, this._local_cursor);
1107 RFB.messages.fbUpdateRequest(this._sock, false, 0, 0, this._fb_width, this._fb_height);
1109 this._timing.fbu_rt_start = (new Date()).getTime();
1110 this._timing.pixels = 0;
1112 this._updateConnectionState('connected');
1116 /* RFB protocol initialization states:
1121 * ClientInitialization - not triggered by server message
1122 * ServerInitialization
1124 _init_msg: function () {
1125 switch (this._rfb_init_state
) {
1126 case 'ProtocolVersion':
1127 return this._negotiate_protocol_version();
1130 return this._negotiate_security();
1132 case 'Authentication':
1133 return this._negotiate_authentication();
1135 case 'SecurityResult':
1136 return this._handle_security_result();
1138 case 'ClientInitialisation':
1139 this._sock
.send([this._shared
? 1 : 0]); // ClientInitialisation
1140 this._rfb_init_state
= 'ServerInitialisation';
1143 case 'ServerInitialisation':
1144 return this._negotiate_server_init();
1147 return this._fail("Internal error", "Unknown init state: " +
1148 this._rfb_init_state
);
1152 _handle_set_colour_map_msg: function () {
1153 Log
.Debug("SetColorMapEntries");
1155 return this._fail("Protocol error", "Unexpected SetColorMapEntries message");
1158 _handle_server_cut_text: function () {
1159 Log
.Debug("ServerCutText");
1161 if (this._sock
.rQwait("ServerCutText header", 7, 1)) { return false; }
1162 this._sock
.rQskipBytes(3); // Padding
1163 var length
= this._sock
.rQshift32();
1164 if (this._sock
.rQwait("ServerCutText", length
, 8)) { return false; }
1166 var text
= this._sock
.rQshiftStr(length
);
1168 if (this._view_only
) { return true; }
1170 this._onClipboard(this, text
);
1175 _handle_server_fence_msg: function() {
1176 if (this._sock
.rQwait("ServerFence header", 8, 1)) { return false; }
1177 this._sock
.rQskipBytes(3); // Padding
1178 var flags
= this._sock
.rQshift32();
1179 var length
= this._sock
.rQshift8();
1181 if (this._sock
.rQwait("ServerFence payload", length
, 9)) { return false; }
1184 Log
.Warn("Bad payload length (" + length
+ ") in fence response");
1188 var payload
= this._sock
.rQshiftStr(length
);
1190 this._supportsFence
= true;
1195 * (1<<0) - BlockBefore
1196 * (1<<1) - BlockAfter
1201 if (!(flags
& (1<<31))) {
1202 return this._fail("Internal error",
1203 "Unexpected fence response");
1206 // Filter out unsupported flags
1207 // FIXME: support syncNext
1208 flags
&= (1<<0) | (1<<1);
1210 // BlockBefore and BlockAfter are automatically handled by
1211 // the fact that we process each incoming message
1213 RFB
.messages
.clientFence(this._sock
, flags
, payload
);
1218 _handle_xvp_msg: function () {
1219 if (this._sock
.rQwait("XVP version and message", 3, 1)) { return false; }
1220 this._sock
.rQskip8(); // Padding
1221 var xvp_ver
= this._sock
.rQshift8();
1222 var xvp_msg
= this._sock
.rQshift8();
1226 Log
.Error("Operation Failed");
1227 this._notification("XVP Operation Failed", 'error');
1230 this._rfb_xvp_ver
= xvp_ver
;
1231 Log
.Info("XVP extensions enabled (version " + this._rfb_xvp_ver
+ ")");
1232 this._onXvpInit(this._rfb_xvp_ver
);
1235 this._fail("Unexpected server message",
1236 "Illegal server XVP message " + xvp_msg
);
1243 _normal_msg: function () {
1246 if (this._FBU
.rects
> 0) {
1249 msg_type
= this._sock
.rQshift8();
1253 case 0: // FramebufferUpdate
1254 var ret
= this._framebufferUpdate();
1255 if (ret
&& !this._enabledContinuousUpdates
) {
1256 RFB
.messages
.fbUpdateRequest(this._sock
, true, 0, 0,
1257 this._fb_width
, this._fb_height
);
1261 case 1: // SetColorMapEntries
1262 return this._handle_set_colour_map_msg();
1269 case 3: // ServerCutText
1270 return this._handle_server_cut_text();
1272 case 150: // EndOfContinuousUpdates
1273 var first
= !(this._supportsContinuousUpdates
);
1274 this._supportsContinuousUpdates
= true;
1275 this._enabledContinuousUpdates
= false;
1277 this._enabledContinuousUpdates
= true;
1278 this._updateContinuousUpdates();
1279 Log
.Info("Enabling continuous updates.");
1281 // FIXME: We need to send a framebufferupdaterequest here
1282 // if we add support for turning off continuous updates
1286 case 248: // ServerFence
1287 return this._handle_server_fence_msg();
1290 return this._handle_xvp_msg();
1293 this._fail("Unexpected server message", "Type:" + msg_type
);
1294 Log
.Debug("sock.rQslice(0, 30): " + this._sock
.rQslice(0, 30));
1299 _onFlush: function() {
1300 this._flushing
= false;
1301 // Resume processing
1302 if (this._sock
.rQlen() > 0) {
1303 this._handle_message();
1307 _framebufferUpdate: function () {
1311 if (this._FBU
.rects
=== 0) {
1312 if (this._sock
.rQwait("FBU header", 3, 1)) { return false; }
1313 this._sock
.rQskip8(); // Padding
1314 this._FBU
.rects
= this._sock
.rQshift16();
1315 this._FBU
.bytes
= 0;
1316 this._timing
.cur_fbu
= 0;
1317 if (this._timing
.fbu_rt_start
> 0) {
1318 now
= (new Date()).getTime();
1319 Log
.Info("First FBU latency: " + (now
- this._timing
.fbu_rt_start
));
1322 // Make sure the previous frame is fully rendered first
1323 // to avoid building up an excessive queue
1324 if (this._display
.pending()) {
1325 this._flushing
= true;
1326 this._display
.flush();
1331 while (this._FBU
.rects
> 0) {
1332 if (this._rfb_connection_state
!== 'connected') { return false; }
1334 if (this._sock
.rQwait("FBU", this._FBU
.bytes
)) { return false; }
1335 if (this._FBU
.bytes
=== 0) {
1336 if (this._sock
.rQwait("rect header", 12)) { return false; }
1337 /* New FramebufferUpdate */
1339 var hdr
= this._sock
.rQshiftBytes(12);
1340 this._FBU
.x
= (hdr
[0] << 8) + hdr
[1];
1341 this._FBU
.y
= (hdr
[2] << 8) + hdr
[3];
1342 this._FBU
.width
= (hdr
[4] << 8) + hdr
[5];
1343 this._FBU
.height
= (hdr
[6] << 8) + hdr
[7];
1344 this._FBU
.encoding
= parseInt((hdr
[8] << 24) + (hdr
[9] << 16) +
1345 (hdr
[10] << 8) + hdr
[11], 10);
1347 this._onFBUReceive(this,
1348 {'x': this._FBU
.x
, 'y': this._FBU
.y
,
1349 'width': this._FBU
.width
, 'height': this._FBU
.height
,
1350 'encoding': this._FBU
.encoding
,
1351 'encodingName': this._encNames
[this._FBU
.encoding
]});
1353 if (!this._encNames
[this._FBU
.encoding
]) {
1354 this._fail("Unexpected server message",
1355 "Unsupported encoding " +
1356 this._FBU
.encoding
);
1361 this._timing
.last_fbu
= (new Date()).getTime();
1363 ret
= this._encHandlers
[this._FBU
.encoding
]();
1365 now
= (new Date()).getTime();
1366 this._timing
.cur_fbu
+= (now
- this._timing
.last_fbu
);
1369 this._encStats
[this._FBU
.encoding
][0]++;
1370 this._encStats
[this._FBU
.encoding
][1]++;
1371 this._timing
.pixels
+= this._FBU
.width
* this._FBU
.height
;
1374 if (this._timing
.pixels
>= (this._fb_width
* this._fb_height
)) {
1375 if ((this._FBU
.width
=== this._fb_width
&& this._FBU
.height
=== this._fb_height
) ||
1376 this._timing
.fbu_rt_start
> 0) {
1377 this._timing
.full_fbu_total
+= this._timing
.cur_fbu
;
1378 this._timing
.full_fbu_cnt
++;
1379 Log
.Info("Timing of full FBU, curr: " +
1380 this._timing
.cur_fbu
+ ", total: " +
1381 this._timing
.full_fbu_total
+ ", cnt: " +
1382 this._timing
.full_fbu_cnt
+ ", avg: " +
1383 (this._timing
.full_fbu_total
/ this._timing
.full_fbu_cnt
));
1386 if (this._timing
.fbu_rt_start
> 0) {
1387 var fbu_rt_diff
= now
- this._timing
.fbu_rt_start
;
1388 this._timing
.fbu_rt_total
+= fbu_rt_diff
;
1389 this._timing
.fbu_rt_cnt
++;
1390 Log
.Info("full FBU round-trip, cur: " +
1391 fbu_rt_diff
+ ", total: " +
1392 this._timing
.fbu_rt_total
+ ", cnt: " +
1393 this._timing
.fbu_rt_cnt
+ ", avg: " +
1394 (this._timing
.fbu_rt_total
/ this._timing
.fbu_rt_cnt
));
1395 this._timing
.fbu_rt_start
= 0;
1399 if (!ret
) { return ret
; } // need more data
1402 this._display
.flip();
1404 this._onFBUComplete(this,
1405 {'x': this._FBU
.x
, 'y': this._FBU
.y
,
1406 'width': this._FBU
.width
, 'height': this._FBU
.height
,
1407 'encoding': this._FBU
.encoding
,
1408 'encodingName': this._encNames
[this._FBU
.encoding
]});
1410 return true; // We finished this FBU
1413 _updateContinuousUpdates: function() {
1414 if (!this._enabledContinuousUpdates
) { return; }
1416 RFB
.messages
.enableContinuousUpdates(this._sock
, true, 0, 0,
1417 this._fb_width
, this._fb_height
);
1420 _resize: function(width
, height
) {
1421 this._fb_width
= width
;
1422 this._fb_height
= height
;
1424 this._destBuff
= new Uint8Array(this._fb_width
* this._fb_height
* 4);
1426 this._display
.resize(this._fb_width
, this._fb_height
);
1427 this._onFBResize(this, this._fb_width
, this._fb_height
);
1429 this._timing
.fbu_rt_start
= (new Date()).getTime();
1430 this._updateContinuousUpdates();
1434 make_properties(RFB
, [
1435 ['target', 'wo', 'dom'], // VNC display rendering Canvas object
1436 ['focusContainer', 'wo', 'dom'], // DOM element that captures keyboard input
1437 ['encrypt', 'rw', 'bool'], // Use TLS/SSL/wss encryption
1438 ['local_cursor', 'rw', 'bool'], // Request locally rendered cursor
1439 ['shared', 'rw', 'bool'], // Request shared mode
1440 ['view_only', 'rw', 'bool'], // Disable client mouse/keyboard
1441 ['xvp_password_sep', 'rw', 'str'], // Separator for XVP password fields
1442 ['disconnectTimeout', 'rw', 'int'], // Time (s) to wait for disconnection
1443 ['wsProtocols', 'rw', 'arr'], // Protocols to use in the WebSocket connection
1444 ['repeaterID', 'rw', 'str'], // [UltraVNC] RepeaterID to connect to
1445 ['viewportDrag', 'rw', 'bool'], // Move the viewport on mouse drags
1447 // Callback functions
1448 ['onUpdateState', 'rw', 'func'], // onUpdateState(rfb, state, oldstate): connection state change
1449 ['onNotification', 'rw', 'func'], // onNotification(rfb, msg, level, options): notification for the UI
1450 ['onDisconnected', 'rw', 'func'], // onDisconnected(rfb, reason): disconnection finished
1451 ['onPasswordRequired', 'rw', 'func'], // onPasswordRequired(rfb, msg): VNC password is required
1452 ['onClipboard', 'rw', 'func'], // onClipboard(rfb, text): RFB clipboard contents received
1453 ['onBell', 'rw', 'func'], // onBell(rfb): RFB Bell message received
1454 ['onFBUReceive', 'rw', 'func'], // onFBUReceive(rfb, fbu): RFB FBU received but not yet processed
1455 ['onFBUComplete', 'rw', 'func'], // onFBUComplete(rfb, fbu): RFB FBU received and processed
1456 ['onFBResize', 'rw', 'func'], // onFBResize(rfb, width, height): frame buffer resized
1457 ['onDesktopName', 'rw', 'func'], // onDesktopName(rfb, name): desktop name received
1458 ['onXvpInit', 'rw', 'func'] // onXvpInit(version): XVP extensions active for this connection
1461 RFB
.prototype.set_local_cursor = function (cursor
) {
1462 if (!cursor
|| (cursor
in {'0': 1, 'no': 1, 'false': 1})) {
1463 this._local_cursor
= false;
1464 this._display
.disableLocalCursor(); //Only show server-side cursor
1466 if (this._display
.get_cursor_uri()) {
1467 this._local_cursor
= true;
1469 Log
.Warn("Browser does not support local cursor");
1470 this._display
.disableLocalCursor();
1474 // Need to send an updated list of encodings if we are connected
1475 if (this._rfb_connection_state
=== "connected") {
1476 RFB
.messages
.clientEncodings(this._sock
, this._encodings
, cursor
);
1480 RFB
.prototype.set_view_only = function (view_only
) {
1481 this._view_only
= view_only
;
1483 if (this._rfb_connection_state
=== "connecting" ||
1484 this._rfb_connection_state
=== "connected") {
1486 this._keyboard
.ungrab();
1487 this._mouse
.ungrab();
1489 this._keyboard
.grab();
1495 RFB
.prototype.get_display = function () { return this._display
; };
1496 RFB
.prototype.get_keyboard = function () { return this._keyboard
; };
1497 RFB
.prototype.get_mouse = function () { return this._mouse
; };
1501 keyEvent: function (sock
, keysym
, down
) {
1502 var buff
= sock
._sQ
;
1503 var offset
= sock
._sQlen
;
1505 buff
[offset
] = 4; // msg-type
1506 buff
[offset
+ 1] = down
;
1508 buff
[offset
+ 2] = 0;
1509 buff
[offset
+ 3] = 0;
1511 buff
[offset
+ 4] = (keysym
>> 24);
1512 buff
[offset
+ 5] = (keysym
>> 16);
1513 buff
[offset
+ 6] = (keysym
>> 8);
1514 buff
[offset
+ 7] = keysym
;
1520 QEMUExtendedKeyEvent: function (sock
, keysym
, down
, keycode
) {
1521 function getRFBkeycode(xt_scancode
) {
1522 var upperByte
= (keycode
>> 8);
1523 var lowerByte
= (keycode
& 0x00ff);
1524 if (upperByte
=== 0xe0 && lowerByte
< 0x7f) {
1525 lowerByte
= lowerByte
| 0x80;
1531 var buff
= sock
._sQ
;
1532 var offset
= sock
._sQlen
;
1534 buff
[offset
] = 255; // msg-type
1535 buff
[offset
+ 1] = 0; // sub msg-type
1537 buff
[offset
+ 2] = (down
>> 8);
1538 buff
[offset
+ 3] = down
;
1540 buff
[offset
+ 4] = (keysym
>> 24);
1541 buff
[offset
+ 5] = (keysym
>> 16);
1542 buff
[offset
+ 6] = (keysym
>> 8);
1543 buff
[offset
+ 7] = keysym
;
1545 var RFBkeycode
= getRFBkeycode(keycode
);
1547 buff
[offset
+ 8] = (RFBkeycode
>> 24);
1548 buff
[offset
+ 9] = (RFBkeycode
>> 16);
1549 buff
[offset
+ 10] = (RFBkeycode
>> 8);
1550 buff
[offset
+ 11] = RFBkeycode
;
1556 pointerEvent: function (sock
, x
, y
, mask
) {
1557 var buff
= sock
._sQ
;
1558 var offset
= sock
._sQlen
;
1560 buff
[offset
] = 5; // msg-type
1562 buff
[offset
+ 1] = mask
;
1564 buff
[offset
+ 2] = x
>> 8;
1565 buff
[offset
+ 3] = x
;
1567 buff
[offset
+ 4] = y
>> 8;
1568 buff
[offset
+ 5] = y
;
1574 // TODO(directxman12): make this unicode compatible?
1575 clientCutText: function (sock
, text
) {
1576 var buff
= sock
._sQ
;
1577 var offset
= sock
._sQlen
;
1579 buff
[offset
] = 6; // msg-type
1581 buff
[offset
+ 1] = 0; // padding
1582 buff
[offset
+ 2] = 0; // padding
1583 buff
[offset
+ 3] = 0; // padding
1585 var n
= text
.length
;
1587 buff
[offset
+ 4] = n
>> 24;
1588 buff
[offset
+ 5] = n
>> 16;
1589 buff
[offset
+ 6] = n
>> 8;
1590 buff
[offset
+ 7] = n
;
1592 for (var i
= 0; i
< n
; i
++) {
1593 buff
[offset
+ 8 + i
] = text
.charCodeAt(i
);
1596 sock
._sQlen
+= 8 + n
;
1600 setDesktopSize: function (sock
, width
, height
, id
, flags
) {
1601 var buff
= sock
._sQ
;
1602 var offset
= sock
._sQlen
;
1604 buff
[offset
] = 251; // msg-type
1605 buff
[offset
+ 1] = 0; // padding
1606 buff
[offset
+ 2] = width
>> 8; // width
1607 buff
[offset
+ 3] = width
;
1608 buff
[offset
+ 4] = height
>> 8; // height
1609 buff
[offset
+ 5] = height
;
1611 buff
[offset
+ 6] = 1; // number-of-screens
1612 buff
[offset
+ 7] = 0; // padding
1615 buff
[offset
+ 8] = id
>> 24; // id
1616 buff
[offset
+ 9] = id
>> 16;
1617 buff
[offset
+ 10] = id
>> 8;
1618 buff
[offset
+ 11] = id
;
1619 buff
[offset
+ 12] = 0; // x-position
1620 buff
[offset
+ 13] = 0;
1621 buff
[offset
+ 14] = 0; // y-position
1622 buff
[offset
+ 15] = 0;
1623 buff
[offset
+ 16] = width
>> 8; // width
1624 buff
[offset
+ 17] = width
;
1625 buff
[offset
+ 18] = height
>> 8; // height
1626 buff
[offset
+ 19] = height
;
1627 buff
[offset
+ 20] = flags
>> 24; // flags
1628 buff
[offset
+ 21] = flags
>> 16;
1629 buff
[offset
+ 22] = flags
>> 8;
1630 buff
[offset
+ 23] = flags
;
1636 clientFence: function (sock
, flags
, payload
) {
1637 var buff
= sock
._sQ
;
1638 var offset
= sock
._sQlen
;
1640 buff
[offset
] = 248; // msg-type
1642 buff
[offset
+ 1] = 0; // padding
1643 buff
[offset
+ 2] = 0; // padding
1644 buff
[offset
+ 3] = 0; // padding
1646 buff
[offset
+ 4] = flags
>> 24; // flags
1647 buff
[offset
+ 5] = flags
>> 16;
1648 buff
[offset
+ 6] = flags
>> 8;
1649 buff
[offset
+ 7] = flags
;
1651 var n
= payload
.length
;
1653 buff
[offset
+ 8] = n
; // length
1655 for (var i
= 0; i
< n
; i
++) {
1656 buff
[offset
+ 9 + i
] = payload
.charCodeAt(i
);
1659 sock
._sQlen
+= 9 + n
;
1663 enableContinuousUpdates: function (sock
, enable
, x
, y
, width
, height
) {
1664 var buff
= sock
._sQ
;
1665 var offset
= sock
._sQlen
;
1667 buff
[offset
] = 150; // msg-type
1668 buff
[offset
+ 1] = enable
; // enable-flag
1670 buff
[offset
+ 2] = x
>> 8; // x
1671 buff
[offset
+ 3] = x
;
1672 buff
[offset
+ 4] = y
>> 8; // y
1673 buff
[offset
+ 5] = y
;
1674 buff
[offset
+ 6] = width
>> 8; // width
1675 buff
[offset
+ 7] = width
;
1676 buff
[offset
+ 8] = height
>> 8; // height
1677 buff
[offset
+ 9] = height
;
1683 pixelFormat: function (sock
, bpp
, depth
, true_color
) {
1684 var buff
= sock
._sQ
;
1685 var offset
= sock
._sQlen
;
1687 buff
[offset
] = 0; // msg-type
1689 buff
[offset
+ 1] = 0; // padding
1690 buff
[offset
+ 2] = 0; // padding
1691 buff
[offset
+ 3] = 0; // padding
1693 buff
[offset
+ 4] = bpp
* 8; // bits-per-pixel
1694 buff
[offset
+ 5] = depth
* 8; // depth
1695 buff
[offset
+ 6] = 0; // little-endian
1696 buff
[offset
+ 7] = true_color
? 1 : 0; // true-color
1698 buff
[offset
+ 8] = 0; // red-max
1699 buff
[offset
+ 9] = 255; // red-max
1701 buff
[offset
+ 10] = 0; // green-max
1702 buff
[offset
+ 11] = 255; // green-max
1704 buff
[offset
+ 12] = 0; // blue-max
1705 buff
[offset
+ 13] = 255; // blue-max
1707 buff
[offset
+ 14] = 16; // red-shift
1708 buff
[offset
+ 15] = 8; // green-shift
1709 buff
[offset
+ 16] = 0; // blue-shift
1711 buff
[offset
+ 17] = 0; // padding
1712 buff
[offset
+ 18] = 0; // padding
1713 buff
[offset
+ 19] = 0; // padding
1719 clientEncodings: function (sock
, encodings
, local_cursor
) {
1720 var buff
= sock
._sQ
;
1721 var offset
= sock
._sQlen
;
1723 buff
[offset
] = 2; // msg-type
1724 buff
[offset
+ 1] = 0; // padding
1726 // offset + 2 and offset + 3 are encoding count
1728 var i
, j
= offset
+ 4, cnt
= 0;
1729 for (i
= 0; i
< encodings
.length
; i
++) {
1730 if (encodings
[i
][0] === "Cursor" && !local_cursor
) {
1731 Log
.Debug("Skipping Cursor pseudo-encoding");
1733 var enc
= encodings
[i
][1];
1734 buff
[j
] = enc
>> 24;
1735 buff
[j
+ 1] = enc
>> 16;
1736 buff
[j
+ 2] = enc
>> 8;
1744 buff
[offset
+ 2] = cnt
>> 8;
1745 buff
[offset
+ 3] = cnt
;
1747 sock
._sQlen
+= j
- offset
;
1751 fbUpdateRequest: function (sock
, incremental
, x
, y
, w
, h
) {
1752 var buff
= sock
._sQ
;
1753 var offset
= sock
._sQlen
;
1755 if (typeof(x
) === "undefined") { x
= 0; }
1756 if (typeof(y
) === "undefined") { y
= 0; }
1758 buff
[offset
] = 3; // msg-type
1759 buff
[offset
+ 1] = incremental
? 1 : 0;
1761 buff
[offset
+ 2] = (x
>> 8) & 0xFF;
1762 buff
[offset
+ 3] = x
& 0xFF;
1764 buff
[offset
+ 4] = (y
>> 8) & 0xFF;
1765 buff
[offset
+ 5] = y
& 0xFF;
1767 buff
[offset
+ 6] = (w
>> 8) & 0xFF;
1768 buff
[offset
+ 7] = w
& 0xFF;
1770 buff
[offset
+ 8] = (h
>> 8) & 0xFF;
1771 buff
[offset
+ 9] = h
& 0xFF;
1778 RFB
.genDES = function (password
, challenge
) {
1780 for (var i
= 0; i
< password
.length
; i
++) {
1781 passwd
.push(password
.charCodeAt(i
));
1783 return (new DES(passwd
)).encrypt(challenge
);
1786 RFB
.encodingHandlers
= {
1788 if (this._FBU
.lines
=== 0) {
1789 this._FBU
.lines
= this._FBU
.height
;
1792 this._FBU
.bytes
= this._FBU
.width
* 4; // at least a line
1793 if (this._sock
.rQwait("RAW", this._FBU
.bytes
)) { return false; }
1794 var cur_y
= this._FBU
.y
+ (this._FBU
.height
- this._FBU
.lines
);
1795 var curr_height
= Math
.min(this._FBU
.lines
,
1796 Math
.floor(this._sock
.rQlen() / (this._FBU
.width
* 4)));
1797 this._display
.blitImage(this._FBU
.x
, cur_y
, this._FBU
.width
,
1798 curr_height
, this._sock
.get_rQ(),
1799 this._sock
.get_rQi());
1800 this._sock
.rQskipBytes(this._FBU
.width
* curr_height
* 4);
1801 this._FBU
.lines
-= curr_height
;
1803 if (this._FBU
.lines
> 0) {
1804 this._FBU
.bytes
= this._FBU
.width
* 4; // At least another line
1807 this._FBU
.bytes
= 0;
1813 COPYRECT: function () {
1814 this._FBU
.bytes
= 4;
1815 if (this._sock
.rQwait("COPYRECT", 4)) { return false; }
1816 this._display
.copyImage(this._sock
.rQshift16(), this._sock
.rQshift16(),
1817 this._FBU
.x
, this._FBU
.y
, this._FBU
.width
,
1821 this._FBU
.bytes
= 0;
1827 if (this._FBU
.subrects
=== 0) {
1828 this._FBU
.bytes
= 4 + 4;
1829 if (this._sock
.rQwait("RRE", 4 + 4)) { return false; }
1830 this._FBU
.subrects
= this._sock
.rQshift32();
1831 color
= this._sock
.rQshiftBytes(4); // Background
1832 this._display
.fillRect(this._FBU
.x
, this._FBU
.y
, this._FBU
.width
, this._FBU
.height
, color
);
1835 while (this._FBU
.subrects
> 0 && this._sock
.rQlen() >= (4 + 8)) {
1836 color
= this._sock
.rQshiftBytes(4);
1837 var x
= this._sock
.rQshift16();
1838 var y
= this._sock
.rQshift16();
1839 var width
= this._sock
.rQshift16();
1840 var height
= this._sock
.rQshift16();
1841 this._display
.fillRect(this._FBU
.x
+ x
, this._FBU
.y
+ y
, width
, height
, color
);
1842 this._FBU
.subrects
--;
1845 if (this._FBU
.subrects
> 0) {
1846 var chunk
= Math
.min(this._rre_chunk_sz
, this._FBU
.subrects
);
1847 this._FBU
.bytes
= (4 + 8) * chunk
;
1850 this._FBU
.bytes
= 0;
1856 HEXTILE: function () {
1857 var rQ
= this._sock
.get_rQ();
1858 var rQi
= this._sock
.get_rQi();
1860 if (this._FBU
.tiles
=== 0) {
1861 this._FBU
.tiles_x
= Math
.ceil(this._FBU
.width
/ 16);
1862 this._FBU
.tiles_y
= Math
.ceil(this._FBU
.height
/ 16);
1863 this._FBU
.total_tiles
= this._FBU
.tiles_x
* this._FBU
.tiles_y
;
1864 this._FBU
.tiles
= this._FBU
.total_tiles
;
1867 while (this._FBU
.tiles
> 0) {
1868 this._FBU
.bytes
= 1;
1869 if (this._sock
.rQwait("HEXTILE subencoding", this._FBU
.bytes
)) { return false; }
1870 var subencoding
= rQ
[rQi
]; // Peek
1871 if (subencoding
> 30) { // Raw
1872 this._fail("Unexpected server message",
1873 "Illegal hextile subencoding: " + subencoding
);
1878 var curr_tile
= this._FBU
.total_tiles
- this._FBU
.tiles
;
1879 var tile_x
= curr_tile
% this._FBU
.tiles_x
;
1880 var tile_y
= Math
.floor(curr_tile
/ this._FBU
.tiles_x
);
1881 var x
= this._FBU
.x
+ tile_x
* 16;
1882 var y
= this._FBU
.y
+ tile_y
* 16;
1883 var w
= Math
.min(16, (this._FBU
.x
+ this._FBU
.width
) - x
);
1884 var h
= Math
.min(16, (this._FBU
.y
+ this._FBU
.height
) - y
);
1886 // Figure out how much we are expecting
1887 if (subencoding
& 0x01) { // Raw
1888 this._FBU
.bytes
+= w
* h
* 4;
1890 if (subencoding
& 0x02) { // Background
1891 this._FBU
.bytes
+= 4;
1893 if (subencoding
& 0x04) { // Foreground
1894 this._FBU
.bytes
+= 4;
1896 if (subencoding
& 0x08) { // AnySubrects
1897 this._FBU
.bytes
++; // Since we aren't shifting it off
1898 if (this._sock
.rQwait("hextile subrects header", this._FBU
.bytes
)) { return false; }
1899 subrects
= rQ
[rQi
+ this._FBU
.bytes
- 1]; // Peek
1900 if (subencoding
& 0x10) { // SubrectsColoured
1901 this._FBU
.bytes
+= subrects
* (4 + 2);
1903 this._FBU
.bytes
+= subrects
* 2;
1908 if (this._sock
.rQwait("hextile", this._FBU
.bytes
)) { return false; }
1910 // We know the encoding and have a whole tile
1911 this._FBU
.subencoding
= rQ
[rQi
];
1913 if (this._FBU
.subencoding
=== 0) {
1914 if (this._FBU
.lastsubencoding
& 0x01) {
1915 // Weird: ignore blanks are RAW
1916 Log
.Debug(" Ignoring blank after RAW");
1918 this._display
.fillRect(x
, y
, w
, h
, this._FBU
.background
);
1920 } else if (this._FBU
.subencoding
& 0x01) { // Raw
1921 this._display
.blitImage(x
, y
, w
, h
, rQ
, rQi
);
1922 rQi
+= this._FBU
.bytes
- 1;
1924 if (this._FBU
.subencoding
& 0x02) { // Background
1925 this._FBU
.background
= [rQ
[rQi
], rQ
[rQi
+ 1], rQ
[rQi
+ 2], rQ
[rQi
+ 3]];
1928 if (this._FBU
.subencoding
& 0x04) { // Foreground
1929 this._FBU
.foreground
= [rQ
[rQi
], rQ
[rQi
+ 1], rQ
[rQi
+ 2], rQ
[rQi
+ 3]];
1933 this._display
.startTile(x
, y
, w
, h
, this._FBU
.background
);
1934 if (this._FBU
.subencoding
& 0x08) { // AnySubrects
1938 for (var s
= 0; s
< subrects
; s
++) {
1940 if (this._FBU
.subencoding
& 0x10) { // SubrectsColoured
1941 color
= [rQ
[rQi
], rQ
[rQi
+ 1], rQ
[rQi
+ 2], rQ
[rQi
+ 3]];
1944 color
= this._FBU
.foreground
;
1949 var sy
= (xy
& 0x0f);
1953 var sw
= (wh
>> 4) + 1;
1954 var sh
= (wh
& 0x0f) + 1;
1956 this._display
.subTile(sx
, sy
, sw
, sh
, color
);
1959 this._display
.finishTile();
1961 this._sock
.set_rQi(rQi
);
1962 this._FBU
.lastsubencoding
= this._FBU
.subencoding
;
1963 this._FBU
.bytes
= 0;
1967 if (this._FBU
.tiles
=== 0) {
1974 TIGHT: function () {
1975 this._FBU
.bytes
= 1; // compression-control byte
1976 if (this._sock
.rQwait("TIGHT compression-control", this._FBU
.bytes
)) { return false; }
1978 var checksum = function (data
) {
1980 for (var i
= 0; i
< data
.length
; i
++) {
1982 if (sum
> 65536) sum
-= 65536;
1987 var resetStreams
= 0;
1989 var decompress = function (data
, expected
) {
1990 for (var i
= 0; i
< 4; i
++) {
1991 if ((resetStreams
>> i
) & 1) {
1992 this._FBU
.zlibs
[i
].reset();
1993 Log
.Info("Reset zlib stream " + i
);
1997 //var uncompressed = this._FBU.zlibs[streamId].uncompress(data, 0);
1998 var uncompressed
= this._FBU
.zlibs
[streamId
].inflate(data
, true, expected
);
1999 /*if (uncompressed.status !== 0) {
2000 Log.Error("Invalid data in zlib stream");
2003 //return uncompressed.data;
2004 return uncompressed
;
2007 var indexedToRGBX2Color = function (data
, palette
, width
, height
) {
2008 // Convert indexed (palette based) image data to RGB
2009 // TODO: reduce number of calculations inside loop
2010 var dest
= this._destBuff
;
2011 var w
= Math
.floor((width
+ 7) / 8);
2012 var w1
= Math
.floor(width
/ 8);
2014 /*for (var y = 0; y < height; y++) {
2016 var yoffset = y * width;
2017 var ybitoffset = y * w;
2018 var xoffset, targetbyte;
2019 for (x = 0; x < w1; x++) {
2020 xoffset = yoffset + x * 8;
2021 targetbyte = data[ybitoffset + x];
2022 for (b = 7; b >= 0; b--) {
2023 dp = (xoffset + 7 - b) * 3;
2024 sp = (targetbyte >> b & 1) * 3;
2025 dest[dp] = palette[sp];
2026 dest[dp + 1] = palette[sp + 1];
2027 dest[dp + 2] = palette[sp + 2];
2031 xoffset = yoffset + x * 8;
2032 targetbyte = data[ybitoffset + x];
2033 for (b = 7; b >= 8 - width % 8; b--) {
2034 dp = (xoffset + 7 - b) * 3;
2035 sp = (targetbyte >> b & 1) * 3;
2036 dest[dp] = palette[sp];
2037 dest[dp + 1] = palette[sp + 1];
2038 dest[dp + 2] = palette[sp + 2];
2042 for (var y
= 0; y
< height
; y
++) {
2044 for (x
= 0; x
< w1
; x
++) {
2045 for (b
= 7; b
>= 0; b
--) {
2046 dp
= (y
* width
+ x
* 8 + 7 - b
) * 4;
2047 sp
= (data
[y
* w
+ x
] >> b
& 1) * 3;
2048 dest
[dp
] = palette
[sp
];
2049 dest
[dp
+ 1] = palette
[sp
+ 1];
2050 dest
[dp
+ 2] = palette
[sp
+ 2];
2055 for (b
= 7; b
>= 8 - width
% 8; b
--) {
2056 dp
= (y
* width
+ x
* 8 + 7 - b
) * 4;
2057 sp
= (data
[y
* w
+ x
] >> b
& 1) * 3;
2058 dest
[dp
] = palette
[sp
];
2059 dest
[dp
+ 1] = palette
[sp
+ 1];
2060 dest
[dp
+ 2] = palette
[sp
+ 2];
2068 var indexedToRGBX = function (data
, palette
, width
, height
) {
2069 // Convert indexed (palette based) image data to RGB
2070 var dest
= this._destBuff
;
2071 var total
= width
* height
* 4;
2072 for (var i
= 0, j
= 0; i
< total
; i
+= 4, j
++) {
2073 var sp
= data
[j
] * 3;
2074 dest
[i
] = palette
[sp
];
2075 dest
[i
+ 1] = palette
[sp
+ 1];
2076 dest
[i
+ 2] = palette
[sp
+ 2];
2083 var rQi
= this._sock
.get_rQi();
2084 var rQ
= this._sock
.rQwhole();
2086 var cl_header
, cl_data
;
2088 var handlePalette = function () {
2089 var numColors
= rQ
[rQi
+ 2] + 1;
2090 var paletteSize
= numColors
* 3;
2091 this._FBU
.bytes
+= paletteSize
;
2092 if (this._sock
.rQwait("TIGHT palette " + cmode
, this._FBU
.bytes
)) { return false; }
2094 var bpp
= (numColors
<= 2) ? 1 : 8;
2095 var rowSize
= Math
.floor((this._FBU
.width
* bpp
+ 7) / 8);
2097 if (rowSize
* this._FBU
.height
< 12) {
2100 cl_data
= rowSize
* this._FBU
.height
;
2101 //clength = [0, rowSize * this._FBU.height];
2103 // begin inline getTightCLength (returning two-item arrays is bad for performance with GC)
2104 var cl_offset
= rQi
+ 3 + paletteSize
;
2107 cl_data
+= rQ
[cl_offset
] & 0x7f;
2108 if (rQ
[cl_offset
] & 0x80) {
2110 cl_data
+= (rQ
[cl_offset
+ 1] & 0x7f) << 7;
2111 if (rQ
[cl_offset
+ 1] & 0x80) {
2113 cl_data
+= rQ
[cl_offset
+ 2] << 14;
2116 // end inline getTightCLength
2119 this._FBU
.bytes
+= cl_header
+ cl_data
;
2120 if (this._sock
.rQwait("TIGHT " + cmode
, this._FBU
.bytes
)) { return false; }
2122 // Shift ctl, filter id, num colors, palette entries, and clength off
2123 this._sock
.rQskipBytes(3);
2124 //var palette = this._sock.rQshiftBytes(paletteSize);
2125 this._sock
.rQshiftTo(this._paletteBuff
, paletteSize
);
2126 this._sock
.rQskipBytes(cl_header
);
2129 data
= this._sock
.rQshiftBytes(cl_data
);
2131 data
= decompress(this._sock
.rQshiftBytes(cl_data
), rowSize
* this._FBU
.height
);
2134 // Convert indexed (palette based) image data to RGB
2136 if (numColors
== 2) {
2137 rgbx
= indexedToRGBX2Color(data
, this._paletteBuff
, this._FBU
.width
, this._FBU
.height
);
2138 this._display
.blitRgbxImage(this._FBU
.x
, this._FBU
.y
, this._FBU
.width
, this._FBU
.height
, rgbx
, 0, false);
2140 rgbx
= indexedToRGBX(data
, this._paletteBuff
, this._FBU
.width
, this._FBU
.height
);
2141 this._display
.blitRgbxImage(this._FBU
.x
, this._FBU
.y
, this._FBU
.width
, this._FBU
.height
, rgbx
, 0, false);
2148 var handleCopy = function () {
2150 var uncompressedSize
= this._FBU
.width
* this._FBU
.height
* 3;
2151 if (uncompressedSize
< 12) {
2154 cl_data
= uncompressedSize
;
2156 // begin inline getTightCLength (returning two-item arrays is for peformance with GC)
2157 var cl_offset
= rQi
+ 1;
2160 cl_data
+= rQ
[cl_offset
] & 0x7f;
2161 if (rQ
[cl_offset
] & 0x80) {
2163 cl_data
+= (rQ
[cl_offset
+ 1] & 0x7f) << 7;
2164 if (rQ
[cl_offset
+ 1] & 0x80) {
2166 cl_data
+= rQ
[cl_offset
+ 2] << 14;
2169 // end inline getTightCLength
2171 this._FBU
.bytes
= 1 + cl_header
+ cl_data
;
2172 if (this._sock
.rQwait("TIGHT " + cmode
, this._FBU
.bytes
)) { return false; }
2174 // Shift ctl, clength off
2175 this._sock
.rQshiftBytes(1 + cl_header
);
2178 data
= this._sock
.rQshiftBytes(cl_data
);
2180 data
= decompress(this._sock
.rQshiftBytes(cl_data
), uncompressedSize
);
2183 this._display
.blitRgbImage(this._FBU
.x
, this._FBU
.y
, this._FBU
.width
, this._FBU
.height
, data
, 0, false);
2188 var ctl
= this._sock
.rQpeek8();
2190 // Keep tight reset bits
2191 resetStreams
= ctl
& 0xF;
2193 // Figure out filter
2195 streamId
= ctl
& 0x3;
2197 if (ctl
=== 0x08) cmode
= "fill";
2198 else if (ctl
=== 0x09) cmode
= "jpeg";
2199 else if (ctl
=== 0x0A) cmode
= "png";
2200 else if (ctl
& 0x04) cmode
= "filter";
2201 else if (ctl
< 0x04) cmode
= "copy";
2202 else return this._fail("Unexpected server message",
2203 "Illegal tight compression received, " +
2207 // fill use depth because TPIXELs drop the padding byte
2208 case "fill": // TPIXEL
2209 this._FBU
.bytes
+= 3;
2211 case "jpeg": // max clength
2212 this._FBU
.bytes
+= 3;
2214 case "png": // max clength
2215 this._FBU
.bytes
+= 3;
2217 case "filter": // filter id + num colors if palette
2218 this._FBU
.bytes
+= 2;
2224 if (this._sock
.rQwait("TIGHT " + cmode
, this._FBU
.bytes
)) { return false; }
2226 // Determine FBU.bytes
2230 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);
2231 this._sock
.rQskipBytes(4);
2235 // begin inline getTightCLength (returning two-item arrays is for peformance with GC)
2236 var cl_offset
= rQi
+ 1;
2239 cl_data
+= rQ
[cl_offset
] & 0x7f;
2240 if (rQ
[cl_offset
] & 0x80) {
2242 cl_data
+= (rQ
[cl_offset
+ 1] & 0x7f) << 7;
2243 if (rQ
[cl_offset
+ 1] & 0x80) {
2245 cl_data
+= rQ
[cl_offset
+ 2] << 14;
2248 // end inline getTightCLength
2249 this._FBU
.bytes
= 1 + cl_header
+ cl_data
; // ctl + clength size + jpeg-data
2250 if (this._sock
.rQwait("TIGHT " + cmode
, this._FBU
.bytes
)) { return false; }
2252 // We have everything, render it
2253 this._sock
.rQskipBytes(1 + cl_header
); // shift off clt + compact length
2254 data
= this._sock
.rQshiftBytes(cl_data
);
2255 this._display
.imageRect(this._FBU
.x
, this._FBU
.y
, "image/" + cmode
, data
);
2258 var filterId
= rQ
[rQi
+ 1];
2259 if (filterId
=== 1) {
2260 if (!handlePalette()) { return false; }
2262 // Filter 0, Copy could be valid here, but servers don't send it as an explicit filter
2263 // Filter 2, Gradient is valid but not use if jpeg is enabled
2264 this._fail("Unexpected server message",
2265 "Unsupported tight subencoding received, " +
2266 "filter: " + filterId
);
2270 if (!handleCopy()) { return false; }
2275 this._FBU
.bytes
= 0;
2281 last_rect: function () {
2282 this._FBU
.rects
= 0;
2286 ExtendedDesktopSize: function () {
2287 this._FBU
.bytes
= 1;
2288 if (this._sock
.rQwait("ExtendedDesktopSize", this._FBU
.bytes
)) { return false; }
2290 this._supportsSetDesktopSize
= true;
2291 var number_of_screens
= this._sock
.rQpeek8();
2293 this._FBU
.bytes
= 4 + (number_of_screens
* 16);
2294 if (this._sock
.rQwait("ExtendedDesktopSize", this._FBU
.bytes
)) { return false; }
2296 this._sock
.rQskipBytes(1); // number-of-screens
2297 this._sock
.rQskipBytes(3); // padding
2299 for (var i
= 0; i
< number_of_screens
; i
+= 1) {
2300 // Save the id and flags of the first screen
2302 this._screen_id
= this._sock
.rQshiftBytes(4); // id
2303 this._sock
.rQskipBytes(2); // x-position
2304 this._sock
.rQskipBytes(2); // y-position
2305 this._sock
.rQskipBytes(2); // width
2306 this._sock
.rQskipBytes(2); // height
2307 this._screen_flags
= this._sock
.rQshiftBytes(4); // flags
2309 this._sock
.rQskipBytes(16);
2314 * The x-position indicates the reason for the change:
2316 * 0 - server resized on its own
2317 * 1 - this client requested the resize
2318 * 2 - another client requested the resize
2321 // We need to handle errors when we requested the resize.
2322 if (this._FBU
.x
=== 1 && this._FBU
.y
!== 0) {
2324 // The y-position indicates the status code from the server
2325 switch (this._FBU
.y
) {
2327 msg
= "Resize is administratively prohibited";
2330 msg
= "Out of resources";
2333 msg
= "Invalid screen layout";
2336 msg
= "Unknown reason";
2339 this._notification("Server did not accept the resize request: "
2342 this._resize(this._FBU
.width
, this._FBU
.height
);
2345 this._FBU
.bytes
= 0;
2346 this._FBU
.rects
-= 1;
2350 DesktopSize: function () {
2351 this._resize(this._FBU
.width
, this._FBU
.height
);
2352 this._FBU
.bytes
= 0;
2353 this._FBU
.rects
-= 1;
2357 Cursor: function () {
2358 Log
.Debug(">> set_cursor");
2359 var x
= this._FBU
.x
; // hotspot-x
2360 var y
= this._FBU
.y
; // hotspot-y
2361 var w
= this._FBU
.width
;
2362 var h
= this._FBU
.height
;
2364 var pixelslength
= w
* h
* 4;
2365 var masklength
= Math
.floor((w
+ 7) / 8) * h
;
2367 this._FBU
.bytes
= pixelslength
+ masklength
;
2368 if (this._sock
.rQwait("cursor encoding", this._FBU
.bytes
)) { return false; }
2370 this._display
.changeCursor(this._sock
.rQshiftBytes(pixelslength
),
2371 this._sock
.rQshiftBytes(masklength
),
2374 this._FBU
.bytes
= 0;
2377 Log
.Debug("<< set_cursor");
2381 QEMUExtendedKeyEvent: function () {
2384 // Old Safari doesn't support creating keyboard events
2386 var keyboardEvent
= document
.createEvent("keyboardEvent");
2387 if (keyboardEvent
.code
!== undefined) {
2388 this._qemuExtKeyEventSupported
= true;