forked from novnc/noVNC
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathrfb.js
2437 lines (2039 loc) · 86.3 KB
/
rfb.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* noVNC: HTML5 VNC client
* Copyright (C) 2012 Joel Martin
* Copyright (C) 2016 Samuel Mannehed for Cendio AB
* Licensed under MPL 2.0 (see LICENSE.txt)
*
* See README.md for usage and integration instructions.
*
* TIGHT decoder portion:
* (c) 2012 Michael Tinglof, Joe Balaz, Les Piech (Mercuri.ca)
*/
import * as Log from './util/logging.js';
import _ from './util/localization.js';
import { decodeUTF8 } from './util/strings.js';
import { set_defaults, make_properties } from './util/properties.js';
import Display from "./display.js";
import Keyboard from "./input/keyboard.js";
import Mouse from "./input/mouse.js";
import Websock from "./websock.js";
import Base64 from "./base64.js";
import DES from "./des.js";
import KeyTable from "./input/keysym.js";
import XtScancode from "./input/xtscancodes.js";
import Inflator from "./inflator.js";
import { encodings, encodingName } from "./encodings.js";
/*jslint white: false, browser: true */
/*global window, Util, Display, Keyboard, Mouse, Websock, Websock_native, Base64, DES, KeyTable, Inflator, XtScancode */
export default function RFB(defaults) {
"use strict";
if (!defaults) {
defaults = {};
}
this._rfb_host = '';
this._rfb_port = 5900;
this._rfb_password = '';
this._rfb_path = '';
this._rfb_connection_state = '';
this._rfb_init_state = '';
this._rfb_version = 0;
this._rfb_max_version = 3.8;
this._rfb_auth_scheme = '';
this._rfb_disconnect_reason = "";
this._rfb_tightvnc = false;
this._rfb_xvp_ver = 0;
this._encHandlers = {};
this._encStats = {};
this._sock = null; // Websock object
this._display = null; // Display object
this._flushing = false; // Display flushing state
this._keyboard = null; // Keyboard input handler object
this._mouse = null; // Mouse input handler object
this._disconnTimer = null; // disconnection timer
this._supportsFence = false;
this._supportsContinuousUpdates = false;
this._enabledContinuousUpdates = false;
// 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_width = 0;
this._fb_height = 0;
this._fb_name = "";
this._destBuff = null;
this._paletteBuff = new Uint8Array(1024); // 256 * 4 (max palette size * max bytes-per-pixel)
this._rre_chunk_sz = 100;
this._timing = {
last_fbu: 0,
fbu_total: 0,
fbu_total_cnt: 0,
full_fbu_total: 0,
full_fbu_cnt: 0,
fbu_rt_start: 0,
fbu_rt_total: 0,
fbu_rt_cnt: 0,
pixels: 0
};
this._supportsSetDesktopSize = false;
this._screen_id = 0;
this._screen_flags = 0;
// Mouse state
this._mouse_buttonMask = 0;
this._mouse_arr = [];
this._viewportDragging = false;
this._viewportDragPos = {};
this._viewportHasMoved = false;
// QEMU Extended Key Event support - default to false
this._qemuExtKeyEventSupported = false;
// set the default value on user-facing properties
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
'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'], // 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): connection state change
'onNotification': function () { }, // onNotification(rfb, msg, level, options): notification for UI
'onDisconnected': function () { }, // onDisconnected(rfb, reason): disconnection finished
'onPasswordRequired': function () { }, // onPasswordRequired(rfb, msg): 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, rect): RFB FBU rect received but not yet processed
'onFBUComplete': function () { }, // onFBUComplete(rfb): 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
Log.Debug(">> RFB.constructor");
// populate encHandlers with bound versions
this._encHandlers[encodings.encodingRaw] = RFB.encodingHandlers.RAW.bind(this)
this._encHandlers[encodings.encodingCopyRect] = RFB.encodingHandlers.COPYRECT.bind(this)
this._encHandlers[encodings.encodingRRE] = RFB.encodingHandlers.RRE.bind(this)
this._encHandlers[encodings.encodingHextile] = RFB.encodingHandlers.HEXTILE.bind(this)
this._encHandlers[encodings.encodingTight] = RFB.encodingHandlers.TIGHT.bind(this)
this._encHandlers[encodings.pseudoEncodingDesktopSize] = RFB.encodingHandlers.DesktopSize.bind(this)
this._encHandlers[encodings.pseudoEncodingLastRect] = RFB.encodingHandlers.last_rect.bind(this)
this._encHandlers[encodings.pseudoEncodingCursor] = RFB.encodingHandlers.Cursor.bind(this)
this._encHandlers[encodings.pseudoEncodingQEMUExtendedKeyEvent] = RFB.encodingHandlers.QEMUExtendedKeyEvent.bind(this)
this._encHandlers[encodings.pseudoEncodingExtendedDesktopSize] = RFB.encodingHandlers.ExtendedDesktopSize.bind(this)
// NB: nothing that needs explicit teardown should be done
// before this point, since this can throw an exception
try {
this._display = new Display({target: this._target,
onFlush: this._onFlush.bind(this)});
} catch (exc) {
Log.Error("Display exception: " + exc);
throw exc;
}
this._keyboard = new Keyboard({target: this._focusContainer,
onKeyEvent: this._handleKeyEvent.bind(this)});
this._mouse = new Mouse({target: this._target,
onMouseButton: this._handleMouseButton.bind(this),
onMouseMove: this._handleMouseMove.bind(this)});
this._sock = new Websock();
this._sock.on('message', this._handle_message.bind(this));
this._sock.on('open', function () {
if ((this._rfb_connection_state === 'connecting') &&
(this._rfb_init_state === '')) {
this._rfb_init_state = 'ProtocolVersion';
Log.Debug("Starting VNC handshake");
} else {
this._fail("Unexpected server connection");
}
}.bind(this));
this._sock.on('close', function (e) {
Log.Warn("WebSocket on-close event");
var msg = "";
if (e.code) {
msg = " (code: " + e.code;
if (e.reason) {
msg += ", reason: " + e.reason;
}
msg += ")";
}
switch (this._rfb_connection_state) {
case 'disconnecting':
this._updateConnectionState('disconnected');
break;
case 'connecting':
this._fail('Failed to connect to server', msg);
break;
case 'connected':
// Handle disconnects that were initiated server-side
this._updateConnectionState('disconnecting');
this._updateConnectionState('disconnected');
break;
case 'disconnected':
this._fail("Unexpected server disconnect",
"Already disconnected: " + msg);
break;
default:
this._fail("Unexpected server disconnect",
"Not in any state yet: " + msg);
break;
}
this._sock.off('close');
}.bind(this));
this._sock.on('error', function (e) {
Log.Warn("WebSocket on-error event");
});
this._init_vars();
this._cleanup();
var rmode = this._display.get_render_mode();
Log.Info("Using native WebSockets, render mode: " + rmode);
Log.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) {
return this._fail(
_("Must set host"));
}
this._rfb_init_state = '';
this._updateConnectionState('connecting');
return true;
},
disconnect: function () {
this._updateConnectionState('disconnecting');
this._sock.off('error');
this._sock.off('message');
this._sock.off('open');
},
sendPassword: function (passwd) {
this._rfb_password = passwd;
setTimeout(this._init_msg.bind(this), 0);
},
sendCtrlAltDel: function () {
if (this._rfb_connection_state !== 'connected' || this._view_only) { return false; }
Log.Info("Sending Ctrl-Alt-Del");
this.sendKey(KeyTable.XK_Control_L, "ControlLeft", true);
this.sendKey(KeyTable.XK_Alt_L, "AltLeft", true);
this.sendKey(KeyTable.XK_Delete, "Delete", true);
this.sendKey(KeyTable.XK_Delete, "Delete", false);
this.sendKey(KeyTable.XK_Alt_L, "AltLeft", false);
this.sendKey(KeyTable.XK_Control_L, "ControlLeft", false);
return true;
},
xvpOp: function (ver, op) {
if (this._rfb_xvp_ver < ver) { return false; }
Log.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 (keysym, code, down) {
if (this._rfb_connection_state !== 'connected' || this._view_only) { return false; }
if (down === undefined) {
this.sendKey(keysym, code, true);
this.sendKey(keysym, code, false);
return true;
}
var scancode = XtScancode[code];
if (this._qemuExtKeyEventSupported && scancode) {
// 0 is NoSymbol
keysym = keysym || 0;
Log.Info("Sending key (" + (down ? "down" : "up") + "): keysym " + keysym + ", scancode " + scancode);
RFB.messages.QEMUExtendedKeyEvent(this._sock, keysym, down, scancode);
} else {
if (!keysym) {
return false;
}
Log.Info("Sending keysym (" + (down ? "down" : "up") + "): " + keysym);
RFB.messages.keyEvent(this._sock, keysym, down ? 1 : 0);
}
return true;
},
clipboardPasteFrom: function (text) {
if (this._rfb_connection_state !== 'connected' || this._view_only) { return; }
RFB.messages.clientCutText(this._sock, text);
},
// Requests a change of remote desktop size. This message is an extension
// and may only be sent if we have received an ExtendedDesktopSize message
requestDesktopSize: function (width, height) {
if (this._rfb_connection_state !== 'connected' ||
this._view_only) {
return false;
}
if (this._supportsSetDesktopSize) {
RFB.messages.setDesktopSize(this._sock, width, height,
this._screen_id, this._screen_flags);
this._sock.flush();
return true;
} else {
return false;
}
},
// Private methods
_connect: function () {
Log.Debug(">> RFB.connect");
this._init_vars();
var uri;
if (typeof UsingSocketIO !== 'undefined') {
uri = 'http';
} else {
uri = this._encrypt ? 'wss' : 'ws';
}
uri += '://' + this._rfb_host;
if(this._rfb_port) {
uri += ':' + this._rfb_port;
}
uri += '/' + this._rfb_path;
Log.Info("connecting to " + uri);
try {
// WebSocket.onopen transitions to the RFB init states
this._sock.open(uri, this._wsProtocols);
} catch (e) {
if (e.name === 'SyntaxError') {
this._fail("Invalid host or port value given", e);
} else {
this._fail("Error while connecting", e);
}
}
Log.Debug("<< RFB.connect");
},
_disconnect: function () {
Log.Debug(">> RFB.disconnect");
this._cleanup();
this._sock.close();
this._print_stats();
Log.Debug("<< RFB.disconnect");
},
_init_vars: function () {
// reset state
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 stats = this._encStats;
Object.keys(stats).forEach(function (key) {
stats[key][0] = 0;
});
var i;
for (i = 0; i < 4; i++) {
this._FBU.zlibs[i] = new Inflator();
}
},
_print_stats: function () {
var stats = this._encStats;
Log.Info("Encoding stats for this connection:");
Object.keys(stats).forEach(function (key) {
var s = stats[key];
if (s[0] + s[1] > 0) {
Log.Info(" " + encodingName(key) + ": " + s[0] + " rects");
}
});
Log.Info("Encoding stats since page load:");
Object.keys(stats).forEach(function (key) {
var s = stats[key];
Log.Info(" " + encodingName(key) + ": " + s[1] + " rects");
});
},
_cleanup: function () {
if (!this._view_only) { this._keyboard.ungrab(); }
if (!this._view_only) { this._mouse.ungrab(); }
this._display.defaultCursor();
if (Log.get_logging() !== 'debug') {
// Show noVNC logo on load and when disconnected, unless in
// debug mode
this._display.clear();
}
},
/*
* Connection states:
* connecting
* connected
* disconnecting
* disconnected - permanent state
*/
_updateConnectionState: function (state) {
var oldstate = this._rfb_connection_state;
if (state === oldstate) {
Log.Debug("Already in state '" + state + "', ignoring");
return;
}
// The 'disconnected' state is permanent for each RFB object
if (oldstate === 'disconnected') {
Log.Error("Tried changing state of a disconnected RFB object");
return;
}
// Ensure proper transitions before doing anything
switch (state) {
case 'connected':
if (oldstate !== 'connecting') {
Log.Error("Bad transition to connected state, " +
"previous connection state: " + oldstate);
return;
}
break;
case 'disconnected':
if (oldstate !== 'disconnecting') {
Log.Error("Bad transition to disconnected state, " +
"previous connection state: " + oldstate);
return;
}
break;
case 'connecting':
if (oldstate !== '') {
Log.Error("Bad transition to connecting state, " +
"previous connection state: " + oldstate);
return;
}
break;
case 'disconnecting':
if (oldstate !== 'connected' && oldstate !== 'connecting') {
Log.Error("Bad transition to disconnecting state, " +
"previous connection state: " + oldstate);
return;
}
break;
default:
Log.Error("Unknown connection state: " + state);
return;
}
// State change actions
this._rfb_connection_state = state;
this._onUpdateState(this, state, oldstate);
var smsg = "New state '" + state + "', was '" + oldstate + "'.";
Log.Debug(smsg);
if (this._disconnTimer && state !== 'disconnecting') {
Log.Debug("Clearing disconnect timer");
clearTimeout(this._disconnTimer);
this._disconnTimer = null;
// make sure we don't get a double event
this._sock.off('close');
}
switch (state) {
case 'disconnected':
// Call onDisconnected callback after onUpdateState since
// we don't know if the UI only displays the latest message
if (this._rfb_disconnect_reason !== "") {
this._onDisconnected(this, this._rfb_disconnect_reason);
} else {
// No reason means clean disconnect
this._onDisconnected(this);
}
break;
case 'connecting':
this._connect();
break;
case 'disconnecting':
this._disconnect();
this._disconnTimer = setTimeout(function () {
this._rfb_disconnect_reason = _("Disconnect timeout");
this._updateConnectionState('disconnected');
}.bind(this), this._disconnectTimeout * 1000);
break;
}
},
/* Print errors and disconnect
*
* The optional parameter 'details' is used for information that
* should be logged but not sent to the user interface.
*/
_fail: function (msg, details) {
var fullmsg = msg;
if (typeof details !== 'undefined') {
fullmsg = msg + " (" + details + ")";
}
switch (this._rfb_connection_state) {
case 'disconnecting':
Log.Error("Failed when disconnecting: " + fullmsg);
break;
case 'connected':
Log.Error("Failed while connected: " + fullmsg);
break;
case 'connecting':
Log.Error("Failed when connecting: " + fullmsg);
break;
default:
Log.Error("RFB failure: " + fullmsg);
break;
}
this._rfb_disconnect_reason = msg; //This is sent to the UI
// Transition to disconnected without waiting for socket to close
this._updateConnectionState('disconnecting');
this._updateConnectionState('disconnected');
return false;
},
/*
* Send a notification to the UI. Valid levels are:
* 'normal'|'warn'|'error'
*
* NOTE: Options could be added in the future.
* NOTE: If this function is called multiple times, remember that the
* interface could be only showing the latest notification.
*/
_notification: function(msg, level, options) {
switch (level) {
case 'normal':
case 'warn':
case 'error':
Log.Debug("Notification[" + level + "]:" + msg);
break;
default:
Log.Error("Invalid notification level: " + level);
return;
}
if (options) {
this._onNotification(this, msg, level, options);
} else {
this._onNotification(this, msg, level);
}
},
_handle_message: function () {
if (this._sock.rQlen() === 0) {
Log.Warn("handle_message called on an empty receive queue");
return;
}
switch (this._rfb_connection_state) {
case 'disconnected':
Log.Error("Got data while disconnected");
break;
case 'connected':
while (true) {
if (this._flushing) {
break;
}
if (!this._normal_msg()) {
break;
}
if (this._sock.rQlen() === 0) {
break;
}
}
break;
default:
this._init_msg();
break;
}
},
_handleKeyEvent: function (keysym, code, down) {
this.sendKey(keysym, code, down);
},
_handleMouseButton: function (x, y, down, bmask) {
if (down) {
this._mouse_buttonMask |= bmask;
} else {
this._mouse_buttonMask &= ~bmask;
}
if (this._viewportDrag) {
if (down && !this._viewportDragging) {
this._viewportDragging = true;
this._viewportDragPos = {'x': x, 'y': y};
// Skip sending mouse events
return;
} else {
this._viewportDragging = false;
// If the viewport didn't actually move, then treat as a mouse click event
// Send the button down event here, as the button up event is sent at the end of this function
if (!this._viewportHasMoved && !this._view_only) {
RFB.messages.pointerEvent(this._sock, this._display.absX(x), this._display.absY(y), bmask);
}
this._viewportHasMoved = false;
}
}
if (this._view_only) { return; } // View only, skip mouse events
if (this._rfb_connection_state !== 'connected') { return; }
RFB.messages.pointerEvent(this._sock, this._display.absX(x), this._display.absY(y), this._mouse_buttonMask);
},
_handleMouseMove: function (x, y) {
if (this._viewportDragging) {
var deltaX = this._viewportDragPos.x - x;
var deltaY = this._viewportDragPos.y - y;
// The goal is to trigger on a certain physical width, the
// devicePixelRatio brings us a bit closer but is not optimal.
var dragThreshold = 10 * (window.devicePixelRatio || 1);
if (this._viewportHasMoved || (Math.abs(deltaX) > dragThreshold ||
Math.abs(deltaY) > dragThreshold)) {
this._viewportHasMoved = true;
this._viewportDragPos = {'x': x, 'y': y};
this._display.viewportChangePos(deltaX, deltaY);
}
// Skip sending mouse events
return;
}
if (this._view_only) { return; } // View only, skip mouse events
if (this._rfb_connection_state !== 'connected') { return; }
RFB.messages.pointerEvent(this._sock, this._display.absX(x), this._display.absY(y), this._mouse_buttonMask);
},
// Message Handlers
_negotiate_protocol_version: function () {
if (this._sock.rQlen() < 12) {
return this._fail("Error while negotiating with server",
"Incomplete protocol version");
}
var sversion = this._sock.rQshiftStr(12).substr(4, 7);
Log.Info("Server ProtocolVersion: " + sversion);
var is_repeater = 0;
switch (sversion) {
case "000.000": // UltraVNC repeater
is_repeater = 1;
break;
case "003.003":
case "003.006": // UltraVNC
case "003.889": // Apple Remote Desktop
this._rfb_version = 3.3;
break;
case "003.007":
this._rfb_version = 3.7;
break;
case "003.008":
case "004.000": // Intel AMT KVM
case "004.001": // RealVNC 4.6
case "005.000": // RealVNC 5.3
this._rfb_version = 3.8;
break;
default:
return this._fail("Unsupported server",
"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;
}
var cversion = "00" + parseInt(this._rfb_version, 10) +
".00" + ((this._rfb_version * 10) % 10);
this._sock.send_string("RFB " + cversion + "\n");
Log.Debug('Sent ProtocolVersion: ' + cversion);
this._rfb_init_state = 'Security';
},
_negotiate_security: function () {
// Polyfill since IE and PhantomJS doesn't have
// TypedArray.includes()
function includes(item, array) {
for (var i = 0; i < array.length; i++) {
if (array[i] === item) {
return true;
}
}
return false;
}
if (this._rfb_version >= 3.7) {
// Server sends supported list, client decides
var num_types = this._sock.rQshift8();
if (this._sock.rQwait("security type", num_types, 1)) { return false; }
if (num_types === 0) {
var strlen = this._sock.rQshift32();
var reason = this._sock.rQshiftStr(strlen);
return this._fail("Error while negotiating with server",
"Security failure: " + reason);
}
var types = this._sock.rQshiftBytes(num_types);
Log.Debug("Server security types: " + types);
// Look for each auth in preferred order
this._rfb_auth_scheme = 0;
if (includes(1, types)) {
this._rfb_auth_scheme = 1; // None
} else if (includes(22, types)) {
this._rfb_auth_scheme = 22; // XVP
} else if (includes(16, types)) {
this._rfb_auth_scheme = 16; // Tight
} else if (includes(2, types)) {
this._rfb_auth_scheme = 2; // VNC Auth
} else {
return this._fail("Unsupported server",
"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._rfb_init_state = 'Authentication';
Log.Debug('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) {
var msg = 'XVP credentials required (user' + xvp_sep +
'target' + xvp_sep + 'password) -- got only ' + this._rfb_password;
this._onPasswordRequired(this, msg);
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) {
this._onPasswordRequired(this);
return false;
}
if (this._sock.rQwait("auth challenge", 16)) { return false; }
// TODO(directxman12): make genDES not require an Array
var challenge = Array.prototype.slice.call(this._sock.rQshiftBytes(16));
var response = RFB.genDES(this._rfb_password, challenge);
this._sock.send(response);
this._rfb_init_state = "SecurityResult";
return true;
},
_negotiate_tight_tunnels: function (numTunnels) {
var clientSupportedTunnelTypes = {
0: { vendor: 'TGHT', signature: 'NOTUNNEL' }
};
var serverSupportedTunnelTypes = {};
// receive tunnel capabilities
for (var i = 0; i < numTunnels; i++) {
var cap_code = this._sock.rQshift32();
var cap_vendor = this._sock.rQshiftStr(4);
var cap_signature = this._sock.rQshiftStr(8);
serverSupportedTunnelTypes[cap_code] = { vendor: cap_vendor, signature: cap_signature };
}
// choose the notunnel type
if (serverSupportedTunnelTypes[0]) {
if (serverSupportedTunnelTypes[0].vendor != clientSupportedTunnelTypes[0].vendor ||
serverSupportedTunnelTypes[0].signature != clientSupportedTunnelTypes[0].signature) {
return this._fail("Unsupported server",
"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("Unsupported server",
"Server wanted tunnels, but doesn't support " +
"the notunnel type");
}
},
_negotiate_tight_auth: function () {
if (!this._rfb_tightvnc) { // first pass, do the tunnel negotiation
if (this._sock.rQwait("num tunnels", 4)) { return false; }
var numTunnels = this._sock.rQshift32();
if (numTunnels > 0 && this._sock.rQwait("tunnel capabilities", 16 * numTunnels, 4)) { return false; }
this._rfb_tightvnc = true;
if (numTunnels > 0) {
this._negotiate_tight_tunnels(numTunnels);
return false; // wait until we receive the sub auth to continue
}
}
// second pass, do the sub-auth negotiation
if (this._sock.rQwait("sub auth count", 4)) { return false; }
var subAuthCount = this._sock.rQshift32();
if (subAuthCount === 0) { // empty sub-auth list received means 'no auth' subtype selected
this._rfb_init_state = 'SecurityResult';
return true;
}
if (this._sock.rQwait("sub auth capabilities", 16 * subAuthCount, 4)) { return false; }
var clientSupportedTypes = {
'STDVNOAUTH__': 1,
'STDVVNCAUTH_': 2
};
var serverSupportedTypes = [];
for (var i = 0; i < subAuthCount; i++) {
var capNum = this._sock.rQshift32();
var capabilities = this._sock.rQshiftStr(12);
serverSupportedTypes.push(capabilities);
}
for (var authType in clientSupportedTypes) {
if (serverSupportedTypes.indexOf(authType) != -1) {
this._sock.send([0, 0, 0, clientSupportedTypes[authType]]);
switch (authType) {
case 'STDVNOAUTH__': // no auth
this._rfb_init_state = 'SecurityResult';
return true;
case 'STDVVNCAUTH_': // VNC auth
this._rfb_auth_scheme = 2;
return this._init_msg();
default:
return this._fail("Unsupported server",
"Unsupported tiny auth scheme: " +
authType);
}
}
}
return this._fail("Unsupported server",
"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("Authentication failure", reason);
case 1: // no auth
if (this._rfb_version >= 3.8) {
this._rfb_init_state = 'SecurityResult';
return true;
}
this._rfb_init_state = 'ClientInitialisation';
return this._init_msg();
case 22: // XVP auth
return this._negotiate_xvp_auth();
case 2: // VNC authentication
return this._negotiate_std_vnc_auth();
case 16: // TightVNC Security Type
return this._negotiate_tight_auth();
default:
return this._fail("Unsupported server",
"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._rfb_init_state = 'ClientInitialisation';
Log.Debug('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("Authentication failure", reason);
} else {
return this._fail("Authentication failure");
}
case 2:
return this._fail("Too many authentication attempts");
default:
return this._fail("Unsupported server",
"Unknown SecurityResult");
}
},
_negotiate_server_init: function () {