forked from Ylianst/MeshCentral
-
Notifications
You must be signed in to change notification settings - Fork 0
/
meshrelay.js
1097 lines (973 loc) · 68.3 KB
/
meshrelay.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
/**
* @description MeshCentral connection relay module
* @author Ylian Saint-Hilaire
* @copyright Intel Corporation 2018-2021
* @license Apache-2.0
* @version v0.0.1
*/
/*jslint node: true */
/*jshint node: true */
/*jshint strict:false */
/*jshint -W097 */
/*jshint esversion: 6 */
"use strict";
// Mesh Rights
const MESHRIGHT_EDITMESH = 0x00000001;
const MESHRIGHT_MANAGEUSERS = 0x00000002;
const MESHRIGHT_MANAGECOMPUTERS = 0x00000004;
const MESHRIGHT_REMOTECONTROL = 0x00000008;
const MESHRIGHT_AGENTCONSOLE = 0x00000010;
const MESHRIGHT_SERVERFILES = 0x00000020;
const MESHRIGHT_WAKEDEVICE = 0x00000040;
const MESHRIGHT_SETNOTES = 0x00000080;
const MESHRIGHT_REMOTEVIEWONLY = 0x00000100;
const MESHRIGHT_NOTERMINAL = 0x00000200;
const MESHRIGHT_NOFILES = 0x00000400;
const MESHRIGHT_NOAMT = 0x00000800;
const MESHRIGHT_DESKLIMITEDINPUT = 0x00001000;
const MESHRIGHT_LIMITEVENTS = 0x00002000;
const MESHRIGHT_CHATNOTIFY = 0x00004000;
const MESHRIGHT_UNINSTALL = 0x00008000;
const MESHRIGHT_NODESKTOP = 0x00010000;
const MESHRIGHT_REMOTECOMMAND = 0x00020000;
const MESHRIGHT_RESETOFF = 0x00040000;
const MESHRIGHT_GUESTSHARING = 0x00080000;
const MESHRIGHT_ADMIN = 0xFFFFFFFF;
function checkDeviceSharePublicIdentifier(parent, domain, nodeid, pid, func) {
// Check the public id
parent.db.GetAllTypeNodeFiltered([nodeid], domain.id, 'deviceshare', null, function (err, docs) {
if ((err != null) || (docs.length == 0)) { func(false); return; }
// Search for the device share public identifier
var found = false;
for (var i = 0; i < docs.length; i++) { if (docs[i].publicid == pid) { found = true; } }
func(found);
});
}
module.exports.CreateMeshRelay = function (parent, ws, req, domain, user, cookie) {
if ((cookie != null) && (typeof cookie.nid == 'string') && (typeof cookie.pid == 'string')) {
checkDeviceSharePublicIdentifier(parent, domain, cookie.nid, cookie.pid, function (result) {
// If the identifier if not found, close the connection
if (result == false) { try { ws.close(); } catch (e) { } return; }
// Public device sharing identifier found, continue as normal.
CreateMeshRelayEx(parent, ws, req, domain, user, cookie);
});
} else {
CreateMeshRelayEx(parent, ws, req, domain, user, cookie);
}
}
function CreateMeshRelayEx(parent, ws, req, domain, user, cookie) {
const currentTime = Date.now();
if (cookie) {
if ((typeof cookie.expire == 'number') && (cookie.expire <= currentTime)) { try { ws.close(); parent.parent.debug('relay', 'Relay: Expires cookie (' + req.clientIp + ')'); } catch (e) { console.log(e); } return; }
if (typeof cookie.nid == 'string') { req.query.nodeid = cookie.nid; }
}
var obj = {};
obj.ws = ws;
obj.id = req.query.id;
obj.user = user;
obj.ruserid = null;
obj.req = req; // Used in multi-server.js
// Setup subscription for desktop sharing public identifier
// If the identifier is removed, drop the connection
if ((cookie != null) && (typeof cookie.pid == 'string')) {
obj.pid = cookie.pid;
parent.parent.AddEventDispatch([cookie.nid], obj);
obj.HandleEvent = function (source, event, ids, id) { if ((event.action == 'removedDeviceShare') && (obj.pid == event.publicid)) { closeBothSides(); } }
}
// Check relay authentication
if ((user == null) && (obj.req.query != null) && (obj.req.query.rauth != null)) {
const rcookie = parent.parent.decodeCookie(obj.req.query.rauth, parent.parent.loginCookieEncryptionKey, 240); // Cookie with 4 hour timeout
if (rcookie.ruserid != null) { obj.ruserid = rcookie.ruserid; }
}
// If there is no authentication, drop this connection
if ((obj.id != null) && (obj.id.startsWith('meshmessenger/') == false) && (obj.user == null) && (obj.ruserid == null)) { try { ws.close(); parent.parent.debug('relay', 'Relay: Connection with no authentication (' + obj.req.clientIp + ')'); } catch (e) { console.log(e); } return; }
// Relay session count (we may remove this in the future)
obj.relaySessionCounted = true;
parent.relaySessionCount++;
// Setup slow relay is requested. This will show down sending any data to this peer.
if ((req.query.slowrelay != null)) {
var sr = null;
try { sr = parseInt(req.query.slowrelay); } catch (ex) { }
if ((typeof sr == 'number') && (sr > 0) && (sr < 1000)) { obj.ws.slowRelay = sr; }
}
// Mesh Rights
const MESHRIGHT_EDITMESH = 1;
const MESHRIGHT_MANAGEUSERS = 2;
const MESHRIGHT_MANAGECOMPUTERS = 4;
const MESHRIGHT_REMOTECONTROL = 8;
const MESHRIGHT_AGENTCONSOLE = 16;
const MESHRIGHT_SERVERFILES = 32;
const MESHRIGHT_WAKEDEVICE = 64;
const MESHRIGHT_SETNOTES = 128;
const MESHRIGHT_REMOTEVIEW = 256;
// Site rights
const SITERIGHT_SERVERBACKUP = 1;
const SITERIGHT_MANAGEUSERS = 2;
const SITERIGHT_SERVERRESTORE = 4;
const SITERIGHT_FILEACCESS = 8;
const SITERIGHT_SERVERUPDATE = 16;
const SITERIGHT_LOCKED = 32;
// Clean a IPv6 address that encodes a IPv4 address
function cleanRemoteAddr(addr) { if (addr.startsWith('::ffff:')) { return addr.substring(7); } else { return addr; } }
// Disconnect this agent
obj.close = function (arg) {
if ((arg == 1) || (arg == null)) { try { ws.close(); parent.parent.debug('relay', 'Relay: Soft disconnect (' + obj.req.clientIp + ')'); } catch (e) { console.log(e); } } // Soft close, close the websocket
if (arg == 2) { try { ws._socket._parent.end(); parent.parent.debug('relay', 'Relay: Hard disconnect (' + obj.req.clientIp + ')'); } catch (e) { console.log(e); } } // Hard close, close the TCP socket
// Aggressive cleanup
delete obj.id;
delete obj.ws;
delete obj.peer;
delete obj.expireTimer;
// Unsubscribe
if (obj.pid != null) { parent.parent.RemoveAllEventDispatch(obj); }
};
obj.sendAgentMessage = function (command, userid, domainid) {
var rights, mesh;
if (command.nodeid == null) return false;
var user = parent.users[userid];
if (user == null) return false;
var splitnodeid = command.nodeid.split('/');
// Check that we are in the same domain and the user has rights over this node.
if ((splitnodeid[0] == 'node') && (splitnodeid[1] == domainid)) {
// Get the user object
// See if the node is connected
var agent = parent.wsagents[command.nodeid];
if (agent != null) {
// Check if we have permission to send a message to that node
rights = parent.GetNodeRights(user, agent.dbMeshKey, agent.dbNodeKey);
mesh = parent.meshes[agent.dbMeshKey];
if ((rights != null) && (mesh != null) || ((rights & MESHRIGHT_REMOTECONTROL) != 0)) {
if (ws.sessionId) { command.sessionid = ws.sessionId; } // Set the session id, required for responses.
command.rights = rights; // Add user rights flags to the message
if (typeof command.consent == 'number') { command.consent = command.consent | mesh.consent; } else { command.consent = mesh.consent; } // Add user consent
if (typeof domain.userconsentflags == 'number') { command.consent |= domain.userconsentflags; } // Add server required consent flags
command.username = user.name; // Add user name
command.realname = user.realname; // Add real name
if (typeof domain.desktopprivacybartext == 'string') { command.privacybartext = domain.desktopprivacybartext; } // Privacy bar text
delete command.nodeid; // Remove the nodeid since it's implyed.
agent.send(JSON.stringify(command));
return true;
}
} else {
// Check if a peer server is connected to this agent
var routing = parent.parent.GetRoutingServerIdNotSelf(command.nodeid, 1); // 1 = MeshAgent routing type
if (routing != null) {
// Check if we have permission to send a message to that node
rights = parent.GetNodeRights(user, routing.meshid, command.nodeid);
mesh = parent.meshes[routing.meshid];
if (rights != null || ((rights & MESHRIGHT_REMOTECONTROL) != 0)) {
if (ws.sessionId) { command.fromSessionid = ws.sessionId; } // Set the session id, required for responses.
command.rights = rights; // Add user rights flags to the message
if (typeof command.consent == 'number') { command.consent = command.consent | mesh.consent; } else { command.consent = mesh.consent; } // Add user consent
if (typeof domain.userconsentflags == 'number') { command.consent |= domain.userconsentflags; } // Add server required consent flags
command.username = user.name; // Add user name
command.realname = user.realname; // Add real name
if (typeof domain.desktopprivacybartext == 'string') { command.privacybartext = domain.desktopprivacybartext; } // Privacy bar text
parent.parent.multiServer.DispatchMessageSingleServer(command, routing.serverid);
return true;
}
}
}
}
return false;
}
// Push any stored message to the peer
obj.pushStoredMessages = function () {
if ((obj.storedPushedMessages != null) && (obj.peer != null)) {
for (var i in obj.storedPushedMessages) {
try { obj.peer.ws.send(JSON.stringify({ action: 'chat', msg: obj.storedPushedMessages[i] })); } catch (ex) { console.log(ex); }
}
}
}
// Push any stored message to the peer
obj.sendPeerImage = function () {
if ((typeof obj.id == 'string') && obj.id.startsWith('meshmessenger/') && (obj.peer != null) && (obj.user != null) && (typeof obj.user.flags == 'number') && (obj.user.flags & 1)) {
parent.db.Get('im' + obj.user._id, function (err, docs) {
if ((err == null) && (docs != null) && (docs.length == 1) && (typeof docs[0].image == 'string')) {
try { obj.peer.ws.send(JSON.stringify({ ctrlChannel: '102938', type: 'image', image: docs[0].image })); } catch (ex) { }
}
});
}
}
// Send a PING/PONG message
function sendPing() {
try { obj.ws.send('{"ctrlChannel":"102938","type":"ping"}'); } catch (ex) { }
try { if (obj.peer != null) { obj.peer.ws.send('{"ctrlChannel":"102938","type":"ping"}'); } } catch (ex) { }
}
function sendPong() {
try { obj.ws.send('{"ctrlChannel":"102938","type":"pong"}'); } catch (ex) { }
try { if (obj.peer != null) { obj.peer.ws.send('{"ctrlChannel":"102938","type":"pong"}'); } } catch (ex) { }
}
function performRelay() {
if (obj.id == null) { try { obj.close(); } catch (e) { } return null; } // Attempt to connect without id, drop this.
ws._socket.setKeepAlive(true, 240000); // Set TCP keep alive
// If this is a MeshMessenger session, the ID is the two userid's and authentication must match one of them.
if (obj.id.startsWith('meshmessenger/')) {
if ((obj.id.startsWith('meshmessenger/user/') == true) && (user == null)) { try { obj.close(); } catch (e) { } return null; } // If user-to-user, both sides need to be authenticated.
var x = obj.id.split('/'), user1 = x[1] + '/' + x[2] + '/' + x[3], user2 = x[4] + '/' + x[5] + '/' + x[6];
if ((x[1] != 'user') && (x[4] != 'user')) { try { obj.close(); } catch (e) { } return null; } // MeshMessenger session must have at least one authenticated user
if ((x[1] == 'user') && (x[4] == 'user')) {
// If this is a user-to-user session, you must be authenticated to join.
if ((user._id != user1) && (user._id != user2)) { try { obj.close(); } catch (e) { } return null; }
} else {
// If only one side of the session is a user
// !!!!! TODO: Need to make sure that one of the two sides is the correct user. !!!!!
}
}
// Validate that the id is valid, we only need to do this on non-authenticated sessions.
// TODO: Figure out when this needs to be done.
/*
if (!parent.args.notls) {
// Check the identifier, if running without TLS, skip this.
var ids = obj.id.split(':');
if (ids.length != 3) { ws.close(); delete obj.id; return null; } // Invalid ID, drop this.
if (parent.crypto.createHmac('SHA384', parent.relayRandom).update(ids[0] + ':' + ids[1]).digest('hex') != ids[2]) { ws.close(); delete obj.id; return null; } // Invalid HMAC, drop this.
if ((Date.now() - parseInt(ids[1])) > 120000) { ws.close(); delete obj.id; return null; } // Expired time, drop this.
obj.id = ids[0];
}
*/
// Check the peer connection status
{
var relayinfo = parent.wsrelays[obj.id];
if (relayinfo) {
if (relayinfo.state == 1) {
// Check that at least one connection is authenticated
if ((obj.authenticated != true) && (relayinfo.peer1.authenticated != true)) {
ws.close();
parent.parent.debug('relay', 'Relay without-auth: ' + obj.id + ' (' + obj.req.clientIp + ')');
delete obj.id;
delete obj.ws;
delete obj.peer;
return null;
}
// Check that both connection are for the same user
if (!obj.id.startsWith('meshmessenger/')) {
var u1 = obj.user ? obj.user._id : obj.ruserid;
var u2 = relayinfo.peer1.user ? relayinfo.peer1.user._id : relayinfo.peer1.ruserid;
if (parent.args.user != null) { // If the server is setup with a default user, correct the userid now.
if (u1 != null) { u1 = 'user/' + domain.id + '/' + parent.args.user.toLowerCase(); }
if (u2 != null) { u2 = 'user/' + domain.id + '/' + parent.args.user.toLowerCase(); }
}
if (u1 != u2) {
ws.close();
parent.parent.debug('relay', 'Relay auth mismatch (' + u1 + ' != ' + u2 + '): ' + obj.id + ' (' + obj.req.clientIp + ')');
delete obj.id;
delete obj.ws;
delete obj.peer;
return null;
}
}
// Connect to peer
obj.peer = relayinfo.peer1;
obj.peer.peer = obj;
relayinfo.peer2 = obj;
relayinfo.state = 2;
relayinfo.peer1.ws._socket.resume(); // Release the traffic
relayinfo.peer2.ws._socket.resume(); // Release the traffic
ws.time = relayinfo.peer1.ws.time = Date.now();
relayinfo.peer1.ws.peer = relayinfo.peer2.ws;
relayinfo.peer2.ws.peer = relayinfo.peer1.ws;
// Remove the timeout
if (relayinfo.timeout) { clearTimeout(relayinfo.timeout); delete relayinfo.timeout; }
// Setup the agent PING/PONG timers unless requested not to
if ((obj.req.query.noping != 1) && (obj.peer.req != null) && (obj.peer.req.query != null) && (obj.peer.req.query.noping != 1)) {
if ((typeof parent.parent.args.agentping == 'number') && (obj.pingtimer == null)) { obj.pingtimer = setInterval(sendPing, parent.parent.args.agentping * 1000); }
else if ((typeof parent.parent.args.agentpong == 'number') && (obj.pongtimer == null)) { obj.pongtimer = setInterval(sendPong, parent.parent.args.agentpong * 1000); }
}
// Setup session recording
var sessionUser = obj.user;
if (sessionUser == null) { sessionUser = obj.peer.user; }
// If this is a MeshMessenger session, set the protocol to 200.
var xtextSession = 0;
var recordSession = false;
if ((obj.id.startsWith('meshmessenger/node/') == true) && (sessionUser != null) && (domain.sessionrecording == true || ((typeof domain.sessionrecording == 'object') && ((domain.sessionrecording.protocols == null) || (domain.sessionrecording.protocols.indexOf(parseInt(200)) >= 0))))) {
var split = obj.id.split('/');
obj.req.query.nodeid = split[1] + '/' + split[2] + '/' + split[3];
recordSession = true;
xtextSession = 2; // 1 = Raw recording of all strings, 2 = Record chat session messages only.
}
if ((obj.req.query.p != null) && (obj.req.query.nodeid != null) && (sessionUser != null) && (domain.sessionrecording == true || ((typeof domain.sessionrecording == 'object') && ((domain.sessionrecording.protocols == null) || (domain.sessionrecording.protocols.indexOf(parseInt(obj.req.query.p)) >= 0))))) { recordSession = true; }
if (recordSession) {
// Get the computer name
parent.db.Get(obj.req.query.nodeid, function (err, nodes) {
var xusername = '', xdevicename = '', xdevicename2 = null, node = null;
if ((nodes != null) && (nodes.length == 1)) { node = nodes[0]; xdevicename2 = node.name; xdevicename = '-' + parent.common.makeFilename(node.name); }
// Check again if we need to do recording
if ((node == null) || (domain.sessionrecording.onlyselecteddevicegroups === true)) {
var mesh = null;
if (node != null) { mesh = parent.meshes[node.meshid]; }
if ((node == null) || (mesh == null) || (mesh.flags == null) || ((mesh.flags & 4) == 0)) {
// Do not record the session, just send session start
try { ws.send('c'); } catch (ex) { } // Send connect to both peers
try { relayinfo.peer1.ws.send('c'); } catch (ex) { }
// Send any stored push messages
obj.pushStoredMessages();
relayinfo.peer1.pushStoredMessages();
// Send other peer's image
obj.sendPeerImage();
relayinfo.peer1.sendPeerImage();
return;
}
}
// Get the username and make it acceptable as a filename
if (sessionUser._id) { xusername = '-' + parent.common.makeFilename(sessionUser._id.split('/')[2]); }
var now = new Date(Date.now());
var xsessionid = obj.id;
if ((typeof xsessionid == 'string') && (xsessionid.startsWith('meshmessenger/node/') == true)) { xsessionid = 'Messenger' }
var recFilename = 'relaysession' + ((domain.id == '') ? '' : '-') + domain.id + '-' + now.getUTCFullYear() + '-' + parent.common.zeroPad(now.getUTCMonth(), 2) + '-' + parent.common.zeroPad(now.getUTCDate(), 2) + '-' + parent.common.zeroPad(now.getUTCHours(), 2) + '-' + parent.common.zeroPad(now.getUTCMinutes(), 2) + '-' + parent.common.zeroPad(now.getUTCSeconds(), 2) + xusername + xdevicename + '-' + xsessionid + (xtextSession ? '.txt' : '.mcrec');
var recFullFilename = null;
if (domain.sessionrecording.filepath) {
try { parent.parent.fs.mkdirSync(domain.sessionrecording.filepath); } catch (e) { }
recFullFilename = parent.parent.path.join(domain.sessionrecording.filepath, recFilename);
} else {
try { parent.parent.fs.mkdirSync(parent.parent.recordpath); } catch (e) { }
recFullFilename = parent.parent.path.join(parent.parent.recordpath, recFilename);
}
parent.parent.fs.open(recFullFilename, 'w', function (err, fd) {
if (err != null) {
// Unable to record
parent.parent.debug('relay', 'Relay: Unable to record to file: ' + recFullFilename);
try { ws.send('c'); } catch (ex) { } // Send connect to both peers
try { relayinfo.peer1.ws.send('c'); } catch (ex) { }
// Send any stored push messages
obj.pushStoredMessages();
relayinfo.peer1.pushStoredMessages();
// Send other peer's image
obj.sendPeerImage();
relayinfo.peer1.sendPeerImage();
} else {
// Write the recording file header
parent.parent.debug('relay', 'Relay: Started recoding to file: ' + recFullFilename);
var metadata = {
magic: 'MeshCentralRelaySession',
ver: 1,
userid: sessionUser._id,
username: sessionUser.name,
sessionid: obj.id,
ipaddr1: (obj.req == null) ? null : obj.req.clientIp,
ipaddr2: ((obj.peer == null) || (obj.peer.req == null)) ? null : obj.peer.req.clientIp,
time: new Date().toLocaleString(),
protocol: (((obj.req == null) || (obj.req.query == null)) ? null : obj.req.query.p),
nodeid: (((obj.req == null) || (obj.req.query == null)) ? null : obj.req.query.nodeid)
};
if (xdevicename2 != null) { metadata.devicename = xdevicename2; }
var firstBlock = JSON.stringify(metadata);
var logfile = { fd: fd, lock: false, filename: recFullFilename, startTime: Date.now(), size: 0, text: xtextSession };
if (node != null) { logfile.nodeid = node._id; logfile.meshid = node.meshid; logfile.name = node.name; logfile.icon = node.icon; }
recordingEntry(logfile, 1, 0, firstBlock, function () {
try { relayinfo.peer1.ws.logfile = ws.logfile = logfile; } catch (ex) {
try { ws.send('c'); } catch (ex) { } // Send connect to both peers, 'cr' indicates the session is being recorded.
try { relayinfo.peer1.ws.send('c'); } catch (ex) { }
// Send any stored push messages
obj.pushStoredMessages();
relayinfo.peer1.pushStoredMessages();
// Send other peer's image
obj.sendPeerImage();
relayinfo.peer1.sendPeerImage();
return;
}
try { ws.send('cr'); } catch (ex) { } // Send connect to both peers, 'cr' indicates the session is being recorded.
try { relayinfo.peer1.ws.send('cr'); } catch (ex) { }
// Send any stored push messages
obj.pushStoredMessages();
relayinfo.peer1.pushStoredMessages();
// Send other peer's image
obj.sendPeerImage();
relayinfo.peer1.sendPeerImage();
});
}
});
});
} else {
// Send session start
try { ws.send('c'); } catch (ex) { } // Send connect to both peers
try { relayinfo.peer1.ws.send('c'); } catch (ex) { }
// Send any stored push messages
obj.pushStoredMessages();
relayinfo.peer1.pushStoredMessages();
// Send other peer's image
obj.sendPeerImage();
relayinfo.peer1.sendPeerImage();
}
parent.parent.debug('relay', 'Relay connected: ' + obj.id + ' (' + obj.req.clientIp + ' --> ' + obj.peer.req.clientIp + ')');
// Log the connection
if (sessionUser != null) {
var msg = 'Started relay session', msgid = 13;
if (obj.req.query.p == 1) { msg = 'Started terminal session'; msgid = 14; }
else if (obj.req.query.p == 2) { msg = 'Started desktop session'; msgid = 15; }
else if (obj.req.query.p == 5) { msg = 'Started file management session'; msgid = 16; }
var event = { etype: 'relay', action: 'relaylog', domain: domain.id, userid: sessionUser._id, username: sessionUser.name, msgid: msgid, msgArgs: [obj.id, obj.peer.req.clientIp, req.clientIp], msg: msg + ' \"' + obj.id + '\" from ' + obj.peer.req.clientIp + ' to ' + req.clientIp, protocol: req.query.p, nodeid: req.query.nodeid };
parent.parent.DispatchEvent(['*', sessionUser._id], obj, event);
}
} else {
// Connected already, drop (TODO: maybe we should re-connect?)
ws.close();
parent.parent.debug('relay', 'Relay duplicate: ' + obj.id + ' (' + obj.req.clientIp + ')');
delete obj.id;
delete obj.ws;
delete obj.peer;
return null;
}
} else {
// Set authenticated side as browser side for messenger sessions
if ((obj.id.startsWith('meshmessenger/node/') == true) && obj.authenticated) { obj.req.query.browser = 1; }
// Wait for other relay connection
if ((obj.id.startsWith('meshmessenger/node/') == true) && obj.authenticated && (parent.parent.firebase != null)) {
// This is an authenticated messenger session, push messaging may be allowed. Don't hold traffic.
ws._socket.resume(); // Don't hold traffic, process push messages
parent.parent.debug('relay', 'Relay messenger waiting: ' + obj.id + ' (' + obj.req.clientIp + ') ' + (obj.authenticated ? 'Authenticated' : ''));
// Fetch the Push Messaging Token
const idsplit = obj.id.split('/');
const nodeid = idsplit[1] + '/' + idsplit[2] + '/' + idsplit[3];
parent.db.Get(nodeid, function (err, nodes) {
if ((err == null) && (nodes != null) && (nodes.length == 1) && (typeof nodes[0].pmt == 'string')) {
if ((parent.GetNodeRights(obj.user, nodes[0].meshid, nodes[0]._id) & MESHRIGHT_CHATNOTIFY) != 0) {
obj.node = nodes[0];
// Create the peer connection URL, we will include that in push messages
obj.msgurl = req.headers.origin + (req.url.split('/.websocket')[0].split('/meshrelay.ashx').join('/messenger')) + '?id=' + req.query.id
}
}
});
parent.wsrelays[obj.id] = { peer1: obj, state: 1 }; // No timeout on connections with push notification.
} else {
ws._socket.pause(); // Hold traffic until the other connection
parent.parent.debug('relay', 'Relay holding: ' + obj.id + ' (' + obj.req.clientIp + ') ' + (obj.authenticated ? 'Authenticated' : ''));
parent.wsrelays[obj.id] = { peer1: obj, state: 1, timeout: setTimeout(closeBothSides, 60000) };
}
// Check if a peer server has this connection
if (parent.parent.multiServer != null) {
var rsession = parent.wsPeerRelays[obj.id];
if ((rsession != null) && (rsession.serverId > parent.parent.serverId)) {
// We must initiate the connection to the peer
parent.parent.multiServer.createPeerRelay(ws, req, rsession.serverId, obj.req.session.userid);
delete parent.wsrelays[obj.id];
} else {
// Send message to other peers that we have this connection
parent.parent.multiServer.DispatchMessage(JSON.stringify({ action: 'relay', id: obj.id }));
}
}
}
}
}
ws.flushSink = function () { try { ws._socket.resume(); } catch (ex) { console.log(ex); } };
// When data is received from the mesh relay web socket
ws.on('message', function (data) {
if (this.peer != null) {
//if (typeof data == 'string') { console.log('Relay: ' + data); } else { console.log('Relay:' + data.length + ' byte(s)'); }
if (this.peer.slowRelay == null) {
try {
this._socket.pause();
if (this.logfile != null) {
// Write data to log file then perform relay
var xthis = this;
recordingEntry(this.logfile, 2, ((obj.req.query.browser) ? 2 : 0), data, function () { xthis.peer.send(data, ws.flushSink); });
} else {
// Perform relay
this.peer.send(data, ws.flushSink);
}
} catch (ex) { console.log(ex); }
} else {
try {
this._socket.pause();
if (this.logfile != null) {
// Write data to log file then perform slow relay
var xthis = this;
recordingEntry(this.logfile, 2, ((obj.req.query.browser) ? 2 : 0), data, function () {
setTimeout(function () { xthis.peer.send(data, ws.flushSink); }, xthis.peer.slowRelay);
});
} else {
// Perform slow relay
var xthis = this;
setTimeout(function () { xthis.peer.send(data, ws.flushSink); }, xthis.peer.slowRelay);
}
} catch (ex) { console.log(ex); }
}
} else {
if ((typeof data == 'string') && (obj.node != null) && (obj.node.pmt != null)) {
var command = null;
try { command = JSON.parse(data); } catch (ex) { return; }
if ((typeof command != 'object') || (command.action != 'chat') || (typeof command.msg != 'string') || (command.msg == '')) return;
// Store pushed messages
if (obj.storedPushedMessages == null) { obj.storedPushedMessages = []; }
obj.storedPushedMessages.push(command.msg);
while (obj.storedPushedMessages.length > 50) { obj.storedPushedMessages.shift(); } // Only keep last 50 notifications
// Send out a push message to the device
command.title = (domain.title ? domain.title : 'MeshCentral');
var payload = { notification: { title: command.title, body: command.msg }, data: { url: obj.msgurl } };
var options = { priority: 'High', timeToLive: 5 * 60 }; // TTL: 5 minutes, priority 'Normal' or 'High'
parent.parent.firebase.sendToDevice(obj.node, payload, options, function (id, err, errdesc) {
if (err == null) {
parent.parent.debug('email', 'Successfully send push message to device ' + obj.node.name + ', title: ' + command.title + ', msg: ' + command.msg);
try { ws.send(JSON.stringify({ action: 'ctrl', value: 1 })); } catch (ex) { } // Push notification success
} else {
parent.parent.debug('email', 'Failed to send push message to device ' + obj.node.name + ', title: ' + command.title + ', msg: ' + command.msg + ', error: ' + errdesc);
try { ws.send(JSON.stringify({ action: 'ctrl', value: 2 })); } catch (ex) { } // Push notification failed
}
});
}
}
});
// If error, close both sides of the relay.
ws.on('error', function (err) {
parent.relaySessionErrorCount++;
if (obj.relaySessionCounted) { parent.relaySessionCount--; delete obj.relaySessionCounted; }
console.log('Relay error from ' + obj.req.clientIp + ', ' + err.toString().split('\r')[0] + '.');
closeBothSides();
});
// If the relay web socket is closed, close both sides.
ws.on('close', function (req) {
if (obj.relaySessionCounted) { parent.relaySessionCount--; delete obj.relaySessionCounted; }
closeBothSides();
});
// Close both our side and the peer side.
function closeBothSides() {
if (obj.id != null) {
var relayinfo = parent.wsrelays[obj.id];
if (relayinfo != null) {
if (relayinfo.state == 2) {
var peer = (relayinfo.peer1 == obj) ? relayinfo.peer2 : relayinfo.peer1;
// Disconnect the peer
try { if (peer.relaySessionCounted) { parent.relaySessionCount--; delete peer.relaySessionCounted; } } catch (ex) { console.log(ex); }
parent.parent.debug('relay', 'Relay disconnect: ' + obj.id + ' (' + obj.req.clientIp + ' --> ' + peer.req.clientIp + ')');
try { peer.ws.close(); } catch (e) { } // Soft disconnect
try { peer.ws._socket._parent.end(); } catch (e) { } // Hard disconnect
// Log the disconnection
if (ws.time) {
var msg = 'Ended relay session', msgid = 9;
if (obj.req.query.p == 1) { msg = 'Ended terminal session', msgid = 10; }
else if (obj.req.query.p == 2) { msg = 'Ended desktop session', msgid = 11; }
else if (obj.req.query.p == 5) { msg = 'Ended file management session', msgid = 12; }
else if (obj.req.query.p == 200) { msg = 'Ended messenger session', msgid = 112; }
if (user) {
var event = { etype: 'relay', action: 'relaylog', domain: domain.id, userid: user._id, username: user.name, msgid: msgid, msgArgs: [obj.id, obj.req.clientIp, obj.peer.req.clientIp, Math.floor((Date.now() - ws.time) / 1000)], msg: msg + ' \"' + obj.id + '\" from ' + obj.req.clientIp + ' to ' + obj.peer.req.clientIp + ', ' + Math.floor((Date.now() - ws.time) / 1000) + ' second(s)', protocol: obj.req.query.p, nodeid: obj.req.query.nodeid };
parent.parent.DispatchEvent(['*', user._id], obj, event);
} else if (peer.user) {
var event = { etype: 'relay', action: 'relaylog', domain: domain.id, userid: peer.user._id, username: peer.user.name, msgid: msgid, msgArgs: [obj.id, obj.req.clientIp, obj.peer.req.clientIp, Math.floor((Date.now() - ws.time) / 1000)], msg: msg + ' \"' + obj.id + '\" from ' + obj.req.clientIp + ' to ' + obj.peer.req.clientIp + ', ' + Math.floor((Date.now() - ws.time) / 1000) + ' second(s)', protocol: obj.req.query.p, nodeid: obj.req.query.nodeid };
parent.parent.DispatchEvent(['*', peer.user._id], obj, event);
}
}
// Aggressive peer cleanup
delete peer.id;
delete peer.ws;
delete peer.peer;
if (peer.pingtimer != null) { clearInterval(peer.pingtimer); delete peer.pingtimer; }
if (peer.pongtimer != null) { clearInterval(peer.pongtimer); delete peer.pongtimer; }
} else {
parent.parent.debug('relay', 'Relay disconnect: ' + obj.id + ' (' + obj.req.clientIp + ')');
}
// Close the recording file if needed
if (ws.logfile != null) {
var logfile = ws.logfile;
delete ws.logfile;
if (peer.ws) { delete peer.ws.logfile; }
recordingEntry(logfile, 3, 0, 'MeshCentralMCREC', function (logfile, tag) {
parent.parent.fs.close(logfile.fd);
// Now that the recording file is closed, check if we need to index this file.
if (domain.sessionrecording.index !== false) { parent.parent.certificateOperations.acceleratorPerformOperation('indexMcRec', tag.logfile.filename); }
// Compute session length
var sessionLength = null;
if (tag.logfile.startTime != null) { sessionLength = Math.round((Date.now() - tag.logfile.startTime) / 1000); }
// Add a event entry about this recording
var basefile = parent.parent.path.basename(tag.logfile.filename);
var event = { etype: 'relay', action: 'recording', domain: domain.id, nodeid: tag.logfile.nodeid, msg: "Finished recording session" + (sessionLength ? (', ' + sessionLength + ' second(s)') : ''), filename: basefile, size: tag.logfile.size };
if (user) { event.userids = [user._id]; } else if (peer.user) { event.userids = [peer.user._id]; }
var xprotocol = (((obj.req == null) || (obj.req.query == null)) ? null : obj.req.query.p);
if ((xprotocol == null) && (logfile.text == 2)) { xprotocol = 200; }
if (xprotocol != null) { event.protocol = parseInt(xprotocol); }
var mesh = parent.meshes[tag.logfile.meshid];
if (mesh != null) { event.meshname = mesh.name; event.meshid = mesh._id; }
if (tag.logfile.startTime) { event.startTime = tag.logfile.startTime; event.lengthTime = sessionLength; }
if (tag.logfile.name) { event.name = tag.logfile.name; }
if (tag.logfile.icon) { event.icon = tag.logfile.icon; }
parent.parent.DispatchEvent(['*', 'recording', obj.nodeid, obj.meshid], obj, event);
cleanUpRecordings();
}, { ws: ws, pws: peer.ws, logfile: logfile });
}
try { ws.close(); } catch (ex) { }
delete parent.wsrelays[obj.id];
}
}
// Aggressive cleanup
delete obj.id;
delete obj.ws;
delete obj.peer;
if (obj.pingtimer != null) { clearInterval(obj.pingtimer); delete obj.pingtimer; }
if (obj.pongtimer != null) { clearInterval(obj.pongtimer); delete obj.pongtimer; }
// Unsubscribe
if (obj.pid != null) { parent.parent.RemoveAllEventDispatch(obj); }
}
// Record a new entry in a recording log
function recordingEntry(logfile, type, flags, data, func, tag) {
try {
if (logfile.text) {
// Text recording format
var out = '';
const utcDate = new Date(Date.now());
if (type == 1) {
// End of start
out = data + '\r\n' + utcDate.toUTCString() + ', ' + "<<<START>>>" + '\r\n';
} else if (type == 3) {
// End of log
out = utcDate.toUTCString() + ', ' + "<<<END>>>" + '\r\n';
} else if (typeof data == 'string') {
// Log message
if (logfile.text == 1) {
out = utcDate.toUTCString() + ', ' + data + '\r\n';
} else if (logfile.text == 2) {
try {
var x = JSON.parse(data);
if (typeof x.action == 'string') {
if ((x.action == 'chat') && (typeof x.msg == 'string')) { out = utcDate.toUTCString() + ', ' + (((flags & 2) ? '--> ' : '<-- ') + x.msg + '\r\n'); }
else if ((x.action == 'file') && (typeof x.name == 'string') && (typeof x.size == 'number')) { out = utcDate.toUTCString() + ', ' + (((flags & 2) ? '--> ' : '<-- ') + "File Transfer" + ', \"' + x.name + '\" (' + x.size + ' ' + "bytes" + ')\r\n'); }
} else if (x.ctrlChannel == null) { out = utcDate.toUTCString() + ', ' + data + '\r\n'; }
} catch (ex) {
out = utcDate.toUTCString() + ', ' + data + '\r\n';
}
}
}
if (out != null) {
// Log this event
const block = Buffer.from(out);
parent.parent.fs.write(logfile.fd, block, 0, block.length, function () { func(logfile, tag); });
logfile.size += block.length;
} else {
// Skip logging this.
func(logfile, tag);
}
} else {
// Binary recording format
if (typeof data == 'string') {
// String write
var blockData = Buffer.from(data), header = Buffer.alloc(16); // Header: Type (2) + Flags (2) + Size(4) + Time(8)
header.writeInt16BE(type, 0); // Type (1 = Header, 2 = Network Data)
header.writeInt16BE(flags, 2); // Flags (1 = Binary, 2 = User)
header.writeInt32BE(blockData.length, 4); // Size
header.writeIntBE(new Date(), 10, 6); // Time
var block = Buffer.concat([header, blockData]);
parent.parent.fs.write(logfile.fd, block, 0, block.length, function () { func(logfile, tag); });
logfile.size += block.length;
} else {
// Binary write
var header = Buffer.alloc(16); // Header: Type (2) + Flags (2) + Size(4) + Time(8)
header.writeInt16BE(type, 0); // Type (1 = Header, 2 = Network Data)
header.writeInt16BE(flags | 1, 2); // Flags (1 = Binary, 2 = User)
header.writeInt32BE(data.length, 4); // Size
header.writeIntBE(new Date(), 10, 6); // Time
var block = Buffer.concat([header, data]);
parent.parent.fs.write(logfile.fd, block, 0, block.length, function () { func(logfile, tag); });
logfile.size += block.length;
}
}
} catch (ex) { console.log(ex); func(logfile, tag); }
}
// If this session has a expire time, setup the expire timer now.
if (cookie && (typeof cookie.expire == 'number')) { obj.expireTimer = setTimeout(closeBothSides, cookie.expire - currentTime); }
// Mark this relay session as authenticated if this is the user end.
obj.authenticated = (user != null);
if (obj.authenticated) {
// Kick off the routing, if we have agent routing instructions, process them here.
// Routing instructions can only be given by a authenticated user
if ((cookie != null) && (cookie.nodeid != null) && (cookie.tcpport != null) && (cookie.domainid != null)) {
// We have routing instructions in the cookie, but first, check user access for this node.
parent.db.Get(cookie.nodeid, function (err, docs) {
if (docs.length == 0) { console.log('ERR: Node not found'); try { obj.close(); } catch (e) { } return; } // Disconnect websocket
const node = docs[0];
// Check if this user has permission to manage this computer
if ((parent.GetNodeRights(user, node.meshid, node._id) & MESHRIGHT_REMOTECONTROL) == 0) { console.log('ERR: Access denied (1)'); try { obj.close(); } catch (e) { } return; }
// Send connection request to agent
const rcookie = parent.parent.encodeCookie({ ruserid: user._id }, parent.parent.loginCookieEncryptionKey);
if (obj.id == null) { obj.id = ('' + Math.random()).substring(2); } // If there is no connection id, generate one.
const command = { nodeid: cookie.nodeid, action: 'msg', type: 'tunnel', userid: user._id, value: '*/meshrelay.ashx?id=' + obj.id + '&rauth=' + rcookie, tcpport: cookie.tcpport, tcpaddr: cookie.tcpaddr, soptions: {} };
if (typeof domain.consentmessages == 'object') {
if (typeof domain.consentmessages.title == 'string') { command.soptions.consentTitle = domain.consentmessages.title; }
if (typeof domain.consentmessages.desktop == 'string') { command.soptions.consentMsgDesktop = domain.consentmessages.desktop; }
if (typeof domain.consentmessages.terminal == 'string') { command.soptions.consentMsgTerminal = domain.consentmessages.terminal; }
if (typeof domain.consentmessages.files == 'string') { command.soptions.consentMsgFiles = domain.consentmessages.files; }
}
if (typeof domain.notificationmessages == 'object') {
if (typeof domain.notificationmessages.title == 'string') { command.soptions.notifyTitle = domain.notificationmessages.title; }
if (typeof domain.notificationmessages.desktop == 'string') { command.soptions.notifyMsgDesktop = domain.notificationmessages.desktop; }
if (typeof domain.notificationmessages.terminal == 'string') { command.soptions.notifyMsgTerminal = domain.notificationmessages.terminal; }
if (typeof domain.notificationmessages.files == 'string') { command.soptions.notifyMsgFiles = domain.notificationmessages.files; }
}
parent.parent.debug('relay', 'Relay: Sending agent tunnel command: ' + JSON.stringify(command));
if (obj.sendAgentMessage(command, user._id, cookie.domainid) == false) { delete obj.id; parent.parent.debug('relay', 'Relay: Unable to contact this agent (' + obj.req.clientIp + ')'); }
performRelay();
});
return obj;
} else if ((obj.req.query.nodeid != null) && ((obj.req.query.tcpport != null) || (obj.req.query.udpport != null))) {
// We have routing instructions in the URL arguments, but first, check user access for this node.
parent.db.Get(obj.req.query.nodeid, function (err, docs) {
if (docs.length == 0) { console.log('ERR: Node not found'); try { obj.close(); } catch (e) { } return; } // Disconnect websocket
const node = docs[0];
// Check if this user has permission to manage this computer
if ((parent.GetNodeRights(user, node.meshid, node._id) & MESHRIGHT_REMOTECONTROL) == 0) { console.log('ERR: Access denied (2)'); try { obj.close(); } catch (e) { } return; }
// Send connection request to agent
if (obj.id == null) { obj.id = ('' + Math.random()).substring(2); } // If there is no connection id, generate one.
const rcookie = parent.parent.encodeCookie({ ruserid: user._id }, parent.parent.loginCookieEncryptionKey);
if (obj.req.query.tcpport != null) {
const command = { nodeid: obj.req.query.nodeid, action: 'msg', type: 'tunnel', userid: user._id, value: '*/meshrelay.ashx?id=' + obj.id + '&rauth=' + rcookie, tcpport: obj.req.query.tcpport, tcpaddr: ((obj.req.query.tcpaddr == null) ? '127.0.0.1' : obj.req.query.tcpaddr), soptions: {} };
if (typeof domain.consentmessages == 'object') {
if (typeof domain.consentmessages.title == 'string') { command.soptions.consentTitle = domain.consentmessages.title; }
if (typeof domain.consentmessages.desktop == 'string') { command.soptions.consentMsgDesktop = domain.consentmessages.desktop; }
if (typeof domain.consentmessages.terminal == 'string') { command.soptions.consentMsgTerminal = domain.consentmessages.terminal; }
if (typeof domain.consentmessages.files == 'string') { command.soptions.consentMsgFiles = domain.consentmessages.files; }
}
if (typeof domain.notificationmessages == 'object') {
if (typeof domain.notificationmessages.title == 'string') { command.soptions.notifyTitle = domain.notificationmessages.title; }
if (typeof domain.notificationmessages.desktop == 'string') { command.soptions.notifyMsgDesktop = domain.notificationmessages.desktop; }
if (typeof domain.notificationmessages.terminal == 'string') { command.soptions.notifyMsgTerminal = domain.notificationmessages.terminal; }
if (typeof domain.notificationmessages.files == 'string') { command.soptions.notifyMsgFiles = domain.notificationmessages.files; }
}
parent.parent.debug('relay', 'Relay: Sending agent TCP tunnel command: ' + JSON.stringify(command));
if (obj.sendAgentMessage(command, user._id, domain.id) == false) { delete obj.id; parent.parent.debug('relay', 'Relay: Unable to contact this agent (' + obj.req.clientIp + ')'); }
} else if (obj.req.query.udpport != null) {
const command = { nodeid: obj.req.query.nodeid, action: 'msg', type: 'tunnel', userid: user._id, value: '*/meshrelay.ashx?id=' + obj.id + '&rauth=' + rcookie, udpport: obj.req.query.udpport, udpaddr: ((obj.req.query.udpaddr == null) ? '127.0.0.1' : obj.req.query.udpaddr), soptions: {} };
if (typeof domain.consentmessages == 'object') {
if (typeof domain.consentmessages.title == 'string') { command.soptions.consentTitle = domain.consentmessages.title; }
if (typeof domain.consentmessages.desktop == 'string') { command.soptions.consentMsgDesktop = domain.consentmessages.desktop; }
if (typeof domain.consentmessages.terminal == 'string') { command.soptions.consentMsgTerminal = domain.consentmessages.terminal; }
if (typeof domain.consentmessages.files == 'string') { command.soptions.consentMsgFiles = domain.consentmessages.files; }
}
if (typeof domain.notificationmessages == 'object') {
if (typeof domain.notificationmessages.title == 'string') { command.soptions.notifyTitle = domain.notificationmessages.title; }
if (typeof domain.notificationmessages.desktop == 'string') { command.soptions.notifyMsgDesktop = domain.notificationmessages.desktop; }
if (typeof domain.notificationmessages.terminal == 'string') { command.soptions.notifyMsgTerminal = domain.notificationmessages.terminal; }
if (typeof domain.notificationmessages.files == 'string') { command.soptions.notifyMsgFiles = domain.notificationmessages.files; }
}
parent.parent.debug('relay', 'Relay: Sending agent UDP tunnel command: ' + JSON.stringify(command));
if (obj.sendAgentMessage(command, user._id, domain.id) == false) { delete obj.id; parent.parent.debug('relay', 'Relay: Unable to contact this agent (' + obj.req.clientIp + ')'); }
}
performRelay();
});
return obj;
} else if ((cookie != null) && (cookie.nid != null) && (typeof cookie.r == 'number') && (typeof cookie.p == 'number') && (typeof cookie.cf == 'number') && (typeof cookie.gn == 'string')) {
// We have routing instructions in the cookie, but first, check user access for this node.
parent.db.Get(cookie.nid, function (err, docs) {
if (docs.length == 0) { console.log('ERR: Node not found'); try { obj.close(); } catch (e) { } return; } // Disconnect websocket
const node = docs[0];
// Check if this user has permission to manage this computer
if ((parent.GetNodeRights(user, node.meshid, node._id) & MESHRIGHT_REMOTECONTROL) == 0) { console.log('ERR: Access denied (2)'); try { obj.close(); } catch (e) { } return; }
// Send connection request to agent
if (obj.id == null) { obj.id = ('' + Math.random()).substring(2); }
const rcookie = parent.parent.encodeCookie({ ruserid: user._id, nodeid: node._id }, parent.parent.loginCookieEncryptionKey);
const command = { nodeid: node._id, action: 'msg', type: 'tunnel', userid: user._id, value: '*/meshrelay.ashx?p=' + cookie.p + '&id=' + obj.id + '&rauth=' + rcookie + '&nodeid=' + node._id, soptions: {}, rights: cookie.r, guestname: cookie.gn, consent: cookie.cf, remoteaddr: cleanRemoteAddr(obj.req.clientIp) };
// Limit what this relay connection can do
if (typeof cookie.p == 'number') {
var usages = [];
if (cookie.p & 1) { usages.push(1); usages.push(6); usages.push(8); usages.push(9); } // Terminal
if (cookie.p & 2) { usages.push(2); } // Desktop
if (cookie.p & 4) { usages.push(5); usages.push(10); } // Files
command.soptions.usages = usages;
}
if (typeof domain.consentmessages == 'object') {
if (typeof domain.consentmessages.title == 'string') { command.soptions.consentTitle = domain.consentmessages.title; }
if (typeof domain.consentmessages.desktop == 'string') { command.soptions.consentMsgDesktop = domain.consentmessages.desktop; }
if (typeof domain.consentmessages.terminal == 'string') { command.soptions.consentMsgTerminal = domain.consentmessages.terminal; }
if (typeof domain.consentmessages.files == 'string') { command.soptions.consentMsgFiles = domain.consentmessages.files; }
}
if (typeof domain.notificationmessages == 'object') {
if (typeof domain.notificationmessages.title == 'string') { command.soptions.notifyTitle = domain.notificationmessages.title; }
if (typeof domain.notificationmessages.desktop == 'string') { command.soptions.notifyMsgDesktop = domain.notificationmessages.desktop; }
if (typeof domain.notificationmessages.terminal == 'string') { command.soptions.notifyMsgTerminal = domain.notificationmessages.terminal; }
if (typeof domain.notificationmessages.files == 'string') { command.soptions.notifyMsgFiles = domain.notificationmessages.files; }
}
parent.parent.debug('relay', 'Relay: Sending agent tunnel command: ' + JSON.stringify(command));
if (obj.sendAgentMessage(command, user._id, domain.id) == false) { delete obj.id; parent.parent.debug('relay', 'Relay: Unable to contact this agent (' + obj.req.clientIp + ')'); }
performRelay(0);
});
return obj;
}
}
// If there is a recording quota, remove any old recordings if needed
function cleanUpRecordings() {
if ((parent.cleanUpRecordingsActive !== true) && domain.sessionrecording && ((typeof domain.sessionrecording.maxrecordings == 'number') || (typeof domain.sessionrecording.maxrecordingsizemegabytes == 'number'))) {
parent.cleanUpRecordingsActive = true;
setTimeout(function () {
var recPath = null, fs = require('fs');
if (domain.sessionrecording.filepath) { recPath = domain.sessionrecording.filepath; } else { recPath = parent.parent.recordpath; }
fs.readdir(recPath, function (err, files) {
if ((err != null) || (files == null)) { delete parent.cleanUpRecordingsActive; return; }
var recfiles = [];
for (var i in files) {
if (files[i].endsWith('.mcrec')) {
var j = files[i].indexOf('-');
if (j > 0) {
var size = null;
try { size = fs.statSync(parent.parent.path.join(recPath, files[i])).size } catch (ex) { }
if (size != null) { recfiles.push({ n: files[i], r: files[i].substring(j + 1), s: size }); }
}
}
}
recfiles.sort(function (a, b) { if (a.r < b.r) return 1; if (a.r > b.r) return -1; return 0; });
var totalFiles = 0, totalSize = 0;
for (var i in recfiles) {
var overQuota = false;
if ((typeof domain.sessionrecording.maxrecordings == 'number') && (totalFiles >= domain.sessionrecording.maxrecordings)) { overQuota = true; }
else if ((typeof domain.sessionrecording.maxrecordingsizemegabytes == 'number') && (totalSize >= (domain.sessionrecording.maxrecordingsizemegabytes * 1048576))) { overQuota = true; }
if (overQuota) { fs.unlinkSync(parent.parent.path.join(recPath, recfiles[i].n)); }
totalFiles++;
totalSize += recfiles[i].s;
}
delete parent.cleanUpRecordingsActive;
});
}, 500);
}
}
// If this is not an authenticated session, or the session does not have routing instructions, just go ahead an connect to existing session.
performRelay();
return obj;
};
/*
Relay session recording required that "SessionRecording":true be set in the domain section of the config.json.
Once done, a folder "meshcentral-recordings" will be created next to "meshcentral-data" that will contain all
of the recording files with the .mcrec extension.
The recording files are binary and contain a set of:
<HEADER><DATABLOCK><HEADER><DATABLOCK><HEADER><DATABLOCK><HEADER><DATABLOCK>...
The header is always 16 bytes long and is encoded like this:
TYPE 2 bytes, 1 = Header, 2 = Network Data, 3 = EndBlock
FLAGS 2 bytes, 0x0001 = Binary, 0x0002 = User
SIZE 4 bytes, Size of the data following this header.
TIME 8 bytes, Time this record was written, number of milliseconds since 1 January, 1970 UTC.
All values are BigEndian encoded. The first data block is of TYPE 1 and contains a JSON string with information
about this recording. It looks something like this:
{
magic: 'MeshCentralRelaySession',
ver: 1,
userid: "user\domain\userid",
username: "username",
sessionid: "RandomValue",
ipaddr1: 1.2.3.4,
ipaddr2: 1.2.3.5,
time: new Date().toLocaleString()
}
The rest of the data blocks are all network traffic that was relayed thru the server. They are of TYPE 2 and have
a given size and timestamp. When looking at network traffic the flags are important:
- If traffic has the first (0x0001) flag set, the data is binary otherwise it's a string.
- If the traffic has the second (0x0002) flag set, traffic is coming from the user's browser, if not, it's coming from the MeshAgent.
*/
module.exports.CreateLocalRelay = function (parent, ws, req, domain, user, cookie) {
CreateLocalRelayEx(parent, ws, req, domain, user, cookie);
}
function CreateLocalRelayEx(parent, ws, req, domain, user, cookie) {
const net = require('net');
var obj = {};
obj.id = Buffer.from(parent.crypto.randomBytes(9), 'binary').toString('base64');
obj.req = req;
obj.ws = ws;
obj.user = user;
// If there is no authentication, drop this connection
if (obj.user == null) { try { ws.close(); parent.parent.debug('relay', 'Relay: Connection with no authentication'); } catch (e) { console.log(e); } return; }
// Use cookie values when present
if (cookie != null) {
if (cookie.nodeid) { req.query.nodeid = cookie.nodeid; }
if (cookie.tcpport) { req.query.tcpport = cookie.tcpport; }
}
// Check for nodeid and tcpport
if ((req.query == null) || (req.query.nodeid == null) || (req.query.tcpport == null)) { try { ws.close(); parent.parent.debug('relay', 'Relay: Connection with invalid arguments'); } catch (e) { console.log(e); } return; }
const tcpport = parseInt(req.query.tcpport);
if ((typeof tcpport != 'number') || (tcpport < 1) || (tcpport > 65535)) { try { ws.close(); parent.parent.debug('relay', 'Relay: Connection with invalid arguments'); } catch (e) { console.log(e); } return; }
var nodeidsplit = req.query.nodeid.split('/');
if ((nodeidsplit.length != 3) || (nodeidsplit[0] != 'node') || (nodeidsplit[1] != domain.id) || (nodeidsplit[2].length < 10)) { try { ws.close(); parent.parent.debug('relay', 'Relay: Connection with invalid arguments'); } catch (e) { console.log(e); } return; }
obj.nodeid = req.query.nodeid;
obj.tcpport = tcpport;
// Relay session count (we may remove this in the future)
obj.relaySessionCounted = true;
parent.relaySessionCount++;
// Setup slow relay is requested. This will show down sending any data to this peer.
if ((req.query.slowrelay != null)) {
var sr = null;
try { sr = parseInt(req.query.slowrelay); } catch (ex) { }
if ((typeof sr == 'number') && (sr > 0) && (sr < 1000)) { obj.ws.slowRelay = sr; }
}
// Hold traffic until we connect to the target
ws._socket.pause();
// Mesh Rights
const MESHRIGHT_EDITMESH = 1;
const MESHRIGHT_MANAGEUSERS = 2;
const MESHRIGHT_MANAGECOMPUTERS = 4;
const MESHRIGHT_REMOTECONTROL = 8;
const MESHRIGHT_AGENTCONSOLE = 16;
const MESHRIGHT_SERVERFILES = 32;
const MESHRIGHT_WAKEDEVICE = 64;
const MESHRIGHT_SETNOTES = 128;
const MESHRIGHT_REMOTEVIEW = 256;