-
Notifications
You must be signed in to change notification settings - Fork 30
/
hidclient.c
1395 lines (1359 loc) · 39.3 KB
/
hidclient.c
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
/*
* hidclient - A Bluetooth HID client device emulation
*
* A bluetooth/bluez software emulating a bluetooth mouse/keyboard
* combination device - use it to transmit mouse movements and
* keyboard keystrokes from a Linux box to any other BTHID enabled
* computer or compatible machine
*
*
* Implementation
* 2004-2006 by Anselm Martin Hoffmeister
* <stockholm(at)users(period)sourceforge(period)net>
* 2004/2005 Implementation for the GPLed Nokia-supported Affix Bluetooth
* stack as a practical work at
* Rheinische Friedrich-Wilhelms-UniversitÀt, Bonn, Germany
* 2006 Software ported to Bluez, several code cleanups
* 2006-07-25 First public release
*
* Updates
* 2012-02-10 by Peter G
* Updated to work with current distro (Lubuntu 11.10)
* EDIT FILE /etc/bluetooth/main.conf
* to include:
* DisablePlugins = network,input,hal,pnat
* AMH: Just disable input might be good enough.
* recomended to change:
* Class = 0x000540
* AMH: This leads to the device being found as "Keyboard".
* Some devices might ignore non-0x540 input devices
* before starting, also execute the following commands
* hciconfig hci0 class 0x000540
* # AMH: Should be optional if Class= set (above)
* hciconfig hci0 name \'Bluetooth Keyboard\'
* # AMH: Optional: Name will be seen by other BTs
* hciconfig hci0 sspmode 0
* # AMH: Optional: Disables simple pairing mode
* sdptool del 0x10000
* sdptool del 0x10001
* sdptool del 0x10002
* sdptool del 0x10003
* sdptool del 0x10004
* sdptool del 0x10005
* sdptool del 0x10006
* sdptool del 0x10007
* sdptool del 0x10008
* # This removes any non-HID SDP entries.
* # Might help if other devices only like
* # single-function Bluetooth devices
* # Not strictly required though.
* 2012-07-26 Several small updates necessary to work on
* Ubuntu 12.04 LTS on amd64
* Added -e, -l, -x
* 2012-07-28 Add support for FIFO operation (-f/filename)
*
* Dependency: Needs libbluetooth (from bluez)
*
* Usage: hidclient [-h|-?|--help] [-s|--skipsdp]
* Start hidclient. -h will display usage information.
* -e<NUM> asks hidclient to ONLY use Input device #NUM
* -f<FILENAME> will not read event devices, but create a
* fifo on <FILENAME> and read input_event data blocks
* from there
* -l will list input devices available
* -x will try to remove the "grabbed" input devices from
* the local X11 server, if possible
* -s will disable SDP registration (which only makes sense
* when debugging as most counterparts require SDP to work)
* Tip: Use "openvt" along with hidclient so that keystrokes and
* mouse events captured will have no negative impact on the
* local machine (except Ctrl+Alt+[Fn/Entf/Pause]).
* Run
* openvt -s -w hidclient
* to run hidclient on a virtual text mode console for itself.
* Alternative: Use "hidclient" in a X11 session after giving the active
* user read permissions on the /dev/input/event<NUM> devices
* you intend to use. With the help of -x (and possibly -e<NUM>)
* this should simply disattach input devices from the local
* machine while hidclient is running (and hopefully, reattach
* them afterwards, of course).
*
* License:
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation;
* strictly version 2 only.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
//***************** Include files
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stropts.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <linux/input.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>
#include <bluetooth/l2cap.h>
#include <bluetooth/sdp.h>
#include <bluetooth/sdp_lib.h>
//***************** Static definitions
// Where to find event devices (that must be readable by current user)
// "%d" to be filled in, opening several devices, see below
#define EVDEVNAME "/dev/input/event%d"
// Maximally, read MAXEVDEVS event devices simultaneously
#define MAXEVDEVS 64
// Bluetooth "ports" (PSMs) for HID usage, standardized to be 17 and 19 resp.
// In theory you could use different ports, but several implementations seem
// to ignore the port info in the SDP records and always use 17 and 19. YMMV.
#define PSMHIDCTL 0x11
#define PSMHIDINT 0x13
// Information to be submitted to the SDP server, as service description
#define HIDINFO_NAME "Bluez virtual Mouse and Keyboard"
#define HIDINFO_PROV "Anselm Martin Hoffmeister (GPL v2)"
#define HIDINFO_DESC "Keyboard"
// These numbers must also be used in the HID descriptor binary file
#define REPORTID_MOUSE 1
#define REPORTID_KEYBD 2
// Fixed SDP record, corresponding to data structures below. Explanation
// is in separate text file. No reason to change this if you do not want
// to fiddle with the data sent over the BT connection as well.
#define SDPRECORD "\x05\x01\x09\x02\xA1\x01\x85\x01\x09\x01\xA1\x00" \
"\x05\x09\x19\x01\x29\x03\x15\x00\x25\x01\x75\x01" \
"\x95\x03\x81\x02\x75\x05\x95\x01\x81\x01\x05\x01" \
"\x09\x30\x09\x31\x09\x38\x15\x81\x25\x7F\x75\x08" \
"\x95\x02\x81\x06\xC0\xC0\x05\x01\x09\x06\xA1\x01" \
"\x85\x02\xA1\x00\x05\x07\x19\xE0\x29\xE7\x15\x00" \
"\x25\x01\x75\x01\x95\x08\x81\x02\x95\x08\x75\x08" \
"\x15\x00\x25\x65\x05\x07\x19\x00\x29\x65\x81\x00" \
"\xC0\xC0"
#define SDPRECORD_BYTES 98
//***************** Function prototypes
int dosdpregistration(void);
void sdpunregister(unsigned int);
static void add_lang_attr(sdp_record_t *r);
int btbind(int sockfd, unsigned short port);
int initevents(unsigned int,int);
void closeevents(void);
int initfifo(char *);
void closefifo(void);
void cleanup_stdin(void);
int add_filedescriptors(fd_set*);
int parse_events(fd_set*,int);
void showhelp(void);
void onsignal(int);
//***************** Data structures
// Mouse HID report, as sent over the wire:
struct hidrep_mouse_t
{
unsigned char btcode; // Fixed value for "Data Frame": 0xA1
unsigned char rep_id; // Will be set to REPORTID_MOUSE for "mouse"
unsigned char button; // bits 0..2 for left,right,middle, others 0
signed char axis_x; // relative movement in pixels, left/right
signed char axis_y; // dito, up/down
signed char axis_z; // Used for the scroll wheel (?)
} __attribute((packed));
// Keyboard HID report, as sent over the wire:
struct hidrep_keyb_t
{
unsigned char btcode; // Fixed value for "Data Frame": 0xA1
unsigned char rep_id; // Will be set to REPORTID_KEYBD for "keyboard"
unsigned char modify; // Modifier keys (shift, alt, the like)
unsigned char key[8]; // Currently pressed keys, max 8 at once
} __attribute((packed));
//***************** Global variables
char prepareshutdown = 0; // Set if shutdown was requested
int eventdevs[MAXEVDEVS]; // file descriptors
int x11handles[MAXEVDEVS];
char mousebuttons = 0; // storage for button status
char modifierkeys = 0; // and for shift/ctrl/alt... status
char pressedkey[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
char connectionok = 0;
uint32_t sdphandle = 0; // To be used to "unregister" on exit
int debugevents = 0; // bitmask for debugging event data
//***************** Implementation
/*
* Taken from bluetooth library because of suspicious memory allocation
* THIS IS A HACK that appears to work, and did not need to look into how it works
* SHOULD BE FIXED AND FIX BACKPORTED TO BLUEZ
*/
sdp_data_t *sdp_seq_alloc_with_length(void **dtds, void **values, int *length,
int len)
{
sdp_data_t *curr = NULL, *seq = NULL;
int i;
int totall = 1024;
for (i = 0; i < len; i++) {
sdp_data_t *data;
int8_t dtd = *(uint8_t *) dtds[i];
if (dtd >= SDP_SEQ8 && dtd <= SDP_ALT32) {
data = (sdp_data_t *) values[i]; }
else {
data = sdp_data_alloc_with_length(dtd, values[i], length[i]); }
if (!data)
return NULL;
if (curr)
curr->next = data;
else
seq = data;
curr = data;
totall += length[i] + sizeof *seq; /* no idea what this should really be */
}
/*
* Here we had a reference here to a non-existing array member. Changed it something that
* appears to be large enough BUT author has no idea what it really should be
*/
// fprintf ( stderr, "length[%d]): %d, totall: %d\n", i, length[i], totall);
return sdp_data_alloc_with_length(SDP_SEQ8, seq, totall);
}
/*
* dosdpregistration - Care for the proper SDP record sent to the "sdpd"
* so that other BT devices can discover the HID service
* Parameters: none; Return value: 0 = OK, >0 = failure
*/
int dosdpregistration ( void )
{
sdp_record_t record;
sdp_session_t *session;
sdp_list_t *svclass_id,
*pfseq,
*apseq,
*root;
uuid_t root_uuid,
hidkb_uuid,
l2cap_uuid,
hidp_uuid;
sdp_profile_desc_t profile[1];
sdp_list_t *aproto,
*proto[3];
sdp_data_t *psm,
*lang_lst,
*lang_lst2,
*hid_spec_lst,
*hid_spec_lst2;
void *dtds[2],
*values[2],
*dtds2[2],
*values2[2];
int i,
leng[2];
uint8_t dtd=SDP_UINT16,
dtd2=SDP_UINT8,
dtd_data=SDP_TEXT_STR8,
hid_spec_type=0x22;
uint16_t hid_attr_lang[]={0x409, 0x100},
ctrl=PSMHIDCTL,
intr=PSMHIDINT,
hid_attr[]={0x100, 0x111, 0x40, 0x00, 0x01, 0x01},
// Assigned to SDP 0x200...0x205 - see HID SPEC for
// details. Those values seem to work fine...
// "it\'s a kind of magic" numbers.
hid_attr2[]={0x100, 0x0};
// Connect to SDP server on localhost, to publish service information
session = sdp_connect ( BDADDR_ANY, BDADDR_LOCAL, 0 );
if ( ! session )
{
fprintf ( stderr, "Failed to connect to SDP server: %s\n",
strerror ( errno ) );
return 1;
}
memset(&record, 0, sizeof(sdp_record_t));
record.handle = 0xffffffff;
// With 0xffffffff, we get assigned the first free record >= 0x10000
// Make HID service visible (add to PUBLIC BROWSE GROUP)
sdp_uuid16_create(&root_uuid, PUBLIC_BROWSE_GROUP);
root = sdp_list_append(0, &root_uuid);
sdp_set_browse_groups(&record, root);
// Language Information to be added
add_lang_attr(&record);
// The descriptor for the keyboard
sdp_uuid16_create(&hidkb_uuid, HID_SVCLASS_ID);
svclass_id = sdp_list_append(0, &hidkb_uuid);
sdp_set_service_classes(&record, svclass_id);
// And information about the HID profile used
sdp_uuid16_create(&profile[0].uuid, HID_PROFILE_ID);
profile[0].version = 0x0100;
pfseq = sdp_list_append(0, profile);
sdp_set_profile_descs(&record, pfseq);
// We are using L2CAP, so add an info about that
sdp_uuid16_create(&l2cap_uuid, L2CAP_UUID);
proto[1] = sdp_list_append(0, &l2cap_uuid);
psm = sdp_data_alloc(SDP_UINT16, &ctrl);
proto[1] = sdp_list_append(proto[1], psm);
apseq = sdp_list_append(0, proto[1]);
// And about our purpose, the HID protocol data transfer
sdp_uuid16_create(&hidp_uuid, HIDP_UUID);
proto[2] = sdp_list_append(0, &hidp_uuid);
apseq = sdp_list_append(apseq, proto[2]);
aproto = sdp_list_append(0, apseq);
sdp_set_access_protos(&record, aproto);
proto[1] = sdp_list_append(0, &l2cap_uuid);
psm = sdp_data_alloc(SDP_UINT16, &intr);
proto[1] = sdp_list_append(proto[1], psm);
apseq = sdp_list_append(0, proto[1]);
sdp_uuid16_create(&hidp_uuid, HIDP_UUID);
proto[2] = sdp_list_append(0, &hidp_uuid);
apseq = sdp_list_append(apseq, proto[2]);
aproto = sdp_list_append(0, apseq);
sdp_set_add_access_protos(&record, aproto);
// Set service name, description
sdp_set_info_attr(&record, HIDINFO_NAME, HIDINFO_PROV, HIDINFO_DESC);
// Add a few HID-specifid pieces of information
// See the HID spec for details what those codes 0x200+something
// are good for... we send a fixed set of info that seems to work
sdp_attr_add_new(&record, SDP_ATTR_HID_DEVICE_RELEASE_NUMBER,
SDP_UINT16, &hid_attr[0]); /* Opt */
sdp_attr_add_new(&record, SDP_ATTR_HID_PARSER_VERSION,
SDP_UINT16, &hid_attr[1]); /* Mand */
sdp_attr_add_new(&record, SDP_ATTR_HID_DEVICE_SUBCLASS,
SDP_UINT8, &hid_attr[2]); /* Mand */
sdp_attr_add_new(&record, SDP_ATTR_HID_COUNTRY_CODE,
SDP_UINT8, &hid_attr[3]); /* Mand */
sdp_attr_add_new(&record, SDP_ATTR_HID_VIRTUAL_CABLE,
SDP_BOOL, &hid_attr[4]); /* Mand */
sdp_attr_add_new(&record, SDP_ATTR_HID_RECONNECT_INITIATE,
SDP_BOOL, &hid_attr[5]); /* Mand */
// Add the HID descriptor (describing the virtual device) as code
// SDP_ATTR_HID_DESCRIPTOR_LIST (0x206 IIRC)
dtds[0] = &dtd2;
values[0] = &hid_spec_type;
dtd_data= SDPRECORD_BYTES <= 255 ? SDP_TEXT_STR8 : SDP_TEXT_STR16 ;
dtds[1] = &dtd_data;
values[1] = (uint8_t *) SDPRECORD;
leng[0] = 0;
leng[1] = SDPRECORD_BYTES;
hid_spec_lst = sdp_seq_alloc_with_length(dtds, values, leng, 2);
hid_spec_lst2 = sdp_data_alloc(SDP_SEQ8, hid_spec_lst);
sdp_attr_add(&record, SDP_ATTR_HID_DESCRIPTOR_LIST, hid_spec_lst2);
// and continue adding further data bytes for 0x206+x values
for (i = 0; i < sizeof(hid_attr_lang) / 2; i++) {
dtds2[i] = &dtd;
values2[i] = &hid_attr_lang[i];
}
lang_lst = sdp_seq_alloc(dtds2, values2, sizeof(hid_attr_lang) / 2);
lang_lst2 = sdp_data_alloc(SDP_SEQ8, lang_lst);
sdp_attr_add(&record, SDP_ATTR_HID_LANG_ID_BASE_LIST, lang_lst2);
sdp_attr_add_new ( &record, SDP_ATTR_HID_PROFILE_VERSION,
SDP_UINT16, &hid_attr2[0] );
sdp_attr_add_new ( &record, SDP_ATTR_HID_BOOT_DEVICE,
SDP_UINT16, &hid_attr2[1] );
// Submit our IDEA of a SDP record to the "sdpd"
if (sdp_record_register(session, &record, SDP_RECORD_PERSIST) < 0) {
fprintf ( stderr, "Service Record registration failed\n" );
return -1;
}
// Store the service handle retrieved from there for reference (i.e.,
// deleting the service info when this program terminates)
sdphandle = record.handle;
fprintf ( stdout, "HID keyboard/mouse service registered\n" );
return 0;
}
/*
* sdpunregister - Remove SDP entry for HID service on program termination
* Parameters: SDP handle (typically 0x10004 or similar)
*/
void sdpunregister ( uint32_t handle )
{
uint32_t range=0x0000ffff;
sdp_list_t * attr;
sdp_session_t * sess;
sdp_record_t * rec;
// Connect to the local SDP server
sess = sdp_connect(BDADDR_ANY, BDADDR_LOCAL, 0);
if ( !sess ) return;
attr = sdp_list_append(0, &range);
rec = sdp_service_attr_req(sess, handle, SDP_ATTR_REQ_RANGE, attr);
sdp_list_free(attr, 0);
if ( !rec ) {
sdp_close(sess);
return;
}
sdp_device_record_unregister(sess, BDADDR_ANY, rec);
sdp_close(sess);
// We do not care wether unregister fails. If it does, we cannot help it.
return;
}
static void add_lang_attr(sdp_record_t *r)
{
sdp_lang_attr_t base_lang;
sdp_list_t *langs = 0;
/* UTF-8 MIBenum (http://www.iana.org/assignments/character-sets) */
base_lang.code_ISO639 = (0x65 << 8) | 0x6e;
base_lang.encoding = 106;
base_lang.base_offset = SDP_PRIMARY_LANG_BASE;
langs = sdp_list_append(0, &base_lang);
sdp_set_lang_attr(r, langs);
sdp_list_free(langs, 0);
}
// Wrapper for bind, caring for all the surrounding variables
int btbind ( int sockfd, unsigned short port ) {
struct sockaddr_l2 l2a;
int i;
memset ( &l2a, 0, sizeof(l2a) );
l2a.l2_family = AF_BLUETOOTH;
bacpy ( &l2a.l2_bdaddr, BDADDR_ANY );
l2a.l2_psm = htobs ( port );
i = bind ( sockfd, (struct sockaddr *)&l2a, sizeof(l2a) );
if ( 0 > i )
{
fprintf ( stderr, "Bind error (PSM %d): %s\n",
port, strerror ( errno ) );
}
return i;
}
/*
* initfifo(filename) - creates (if necessary) and opens fifo
* instead of event devices. If filename exists and is NOT a fifo,
* abort with error.
*/
int initfifo ( char *filename )
{
struct stat ss;
if ( NULL == filename ) return 0;
if ( 0 == stat ( filename, &ss ) )
{
if ( ! S_ISFIFO(ss.st_mode) )
{
fprintf(stderr,"File [%s] exists, but is not a fifo.\n", filename );
return 0;
}
} else {
if ( 0 != mkfifo ( filename, S_IRUSR | S_IWUSR ) )
{ // default permissions for created fifo is rw------- (user=rw)
fprintf(stderr,"Failed to create new fifo [%s]\n", filename );
return 0;
}
}
eventdevs[0] = open ( filename, O_RDONLY | O_NONBLOCK );
if ( 0 > eventdevs[0] )
{
fprintf ( stderr, "Failed to open fifo [%s] for reading.\n", filename );
return 0;
}
return 1;
}
/*
* initevents () - opens all required event files
* or only the ones specified by evdevmask, if evdevmask != 0
* try to disable in X11 if mutex11 is set to 1
* returns number of successfully opened event file nodes, or <1 for error
*/
int initevents ( unsigned int evdevmask, int mutex11 )
{
int i, j, k;
char buf[sizeof(EVDEVNAME)+8];
char *xinlist = NULL;
FILE *pf;
char *p, *q;
if ( mutex11 )
{
if ( NULL == ( xinlist = malloc ( 4096 ) ) )
{
printf ( "Memory alloc error\n" );
return 0;
}
bzero ( xinlist, 4096 );
if ( NULL != ( pf = popen ("xinput --list --short", "r" ) ) )
{
if ( 1 > fread ( xinlist, 1, 3800, pf ) )
{
printf ( "\tx11-mutable information not available.\n" );
free ( xinlist );
xinlist = NULL;
}
}
fclose ( pf );
}
for ( i = 0; i < MAXEVDEVS; ++i )
{
eventdevs[i] = -1;
x11handles[i] = -1;
}
for ( i = j = 0; j < MAXEVDEVS; ++j )
{
if ( ( evdevmask != 0 ) && ( ( evdevmask & ( 1 << j ) ) == 0 ) ) { continue; }
sprintf ( buf, EVDEVNAME, j );
eventdevs[i] = open ( buf, O_RDONLY );
if ( 0 <= eventdevs[i] )
{
fprintf ( stdout, "Opened %s as event device [counter %d]\n", buf, i );
if ( ( mutex11 > 0 ) && ( xinlist != NULL ) )
{
k = -1;
xinlist[3801] = 0;
if ( ioctl(eventdevs[i], EVIOCGNAME(256),xinlist+3801) >= 0 )
{
p = xinlist;
xinlist[4056] = 0;
if ( strlen(xinlist+3801) < 4 ) // min lenght for name
p = xinlist + 4056;
while ( (*p != 0) &&
( NULL != ( p = strstr ( p, xinlist+3801 ) ) ) )
{
q = p + strlen(xinlist+3801);
while ( *q == ' ' ) ++q;
if ( strncmp ( q, "\tid=", 4 ) == 0 )
{
k = atoi ( q + 4 );
p = xinlist + 4056;
} else {
p = q;
}
}
}
if ( k >= 0 ) {
sprintf ( xinlist+3801, "xinput set-int-prop %d \"Device "\
"Enabled\" 8 0", k );
if ( system ( xinlist + 3801 ) )
{
fprintf ( stderr, "Failed to x11-mute.\n" );
}
x11handles[i] = k;
}
}
++i;
}
}
if ( xinlist != NULL ) { free ( xinlist ); }
return i;
}
void closeevents ( void )
{
int i;
char buf[256];
for ( i = 0; i < MAXEVDEVS; ++i )
{
if ( eventdevs[i] >= 0 )
{
close ( eventdevs[i] );
if ( x11handles[i] >= 0 )
{
sprintf ( buf, "xinput set-int-prop %d \"Device "\
"Enabled\" 8 1", x11handles[i] );
if ( system ( buf ) )
{
fprintf ( stderr, "Failed to x11-unmute device %d.\n", i );
}
}
}
}
return;
}
void closefifo ( void )
{
if ( eventdevs[0] >= 0 )
close(eventdevs[0]);
return;
}
void cleanup_stdin ( void )
{
// Cleans everything but the characters after the last ENTER keypress.
// This is necessary BECAUSE while reading all keyboard input from the
// event devices, those key presses will still stay in the stdin queue.
// We do not want to have a backlog of hundreds of characters, possibly
// commands and so on.
fd_set fds;
struct timeval tv;
FD_ZERO ( &fds );
FD_SET ( 0, &fds );
tv.tv_sec = 0;
tv.tv_usec = 0;
char buf[8];
while ( 0 < select ( 1, &fds, NULL, NULL, &tv ) )
{
while ( read ( 0, buf, 8 ) ) {;}
FD_ZERO ( &fds );
FD_SET ( 0, &fds );
tv.tv_sec = 0;
tv.tv_usec = 1;
}
close ( 0 );
return;
}
int add_filedescriptors ( fd_set * fdsp )
{
// Simply add all open eventdev fds to the fd_set for select.
int i, j;
FD_ZERO ( fdsp );
j = -1;
for ( i = 0; i < MAXEVDEVS; ++i )
{
if ( eventdevs[i] >= 0 )
{
FD_SET ( eventdevs[i], fdsp );
if ( eventdevs[i] > j )
{
j = eventdevs[i];
}
}
}
return j;
}
/*
* list_input_devices - Show a human-readable list of all input devices
* the current user has permissions to read from.
* Add info wether this probably can be "muted" in X11 if requested
*/
int list_input_devices ()
{
int i, fd;
char buf[sizeof(EVDEVNAME)+8];
struct input_id device_info;
char namebuf[256];
char *xinlist;
FILE *pf;
char *p, *q;
char x11 = 0;
if ( NULL == ( xinlist = malloc ( 4096 ) ) )
{
printf ( "Memory alloc error\n" );
return 1;
}
bzero ( xinlist, 4096 );
if ( NULL != ( pf = popen ("xinput --list --name-only", "r" ) ) )
{
if ( 1 > fread ( xinlist, 1, 4095, pf ) )
{
printf ( "\tx11-mutable information not available.\n" );
}
fclose ( pf );
}
printf ( "List of available input devices:\n");
printf ( "num\tVendor/Product, Name, -x compatible (x/-)\n" );
for ( i = 0; i < MAXEVDEVS; ++i )
{
sprintf ( buf, EVDEVNAME, i );
fd = open ( buf, O_RDONLY );
if ( fd < 0 )
{
if ( errno == ENOENT ) { i = MAXEVDEVS ; break; }
if ( errno == EACCES )
{
printf ( "%2d:\t[permission denied]\n", i );
}
continue;
}
if ( ioctl ( fd, EVIOCGID, &device_info ) < 0 )
{
close(fd); continue;
}
if ( ioctl ( fd, EVIOCGNAME(sizeof(namebuf)-4), namebuf+2) < 0 )
{
close(fd); continue;
}
namebuf[sizeof(namebuf)-4] = 0;
x11 = 0;
p = xinlist;
while ( ( p != NULL ) && ( *p != 0 ) )
{
if ( NULL == ( q = strchr ( p, 0x0a ) ) ) { break; }
*q = 0;
if ( strcmp ( p, namebuf + 2 ) == 0 ) { x11 = 1; }
*q = 0x0a;
while ( (*q > 0) && (*q <= 0x20 ) ) { ++q; }
p = q;
}
printf("%2d\t[%04hx:%04hx.%04hx] '%s' (%s)", i,
device_info.vendor, device_info.product,
device_info.version, namebuf + 2, x11 ? "+" : "-");
printf("\n");
close ( fd );
}
free ( xinlist );
return 0;
}
/* parse_events - At least one filedescriptor can now be read
* So retrieve data and parse it, eventually sending out a hid report!
* Return value <0 means connection broke and shall be disconnected
*/
int parse_events ( fd_set * efds, int sockdesc )
{
int i, j;
signed char c;
unsigned char u;
char buf[sizeof(struct input_event)];
char hidrep[32]; // mouse ~6, keyboard ~11 chars
struct input_event * inevent = (void *)buf;
struct hidrep_mouse_t * evmouse = (void *)hidrep;
struct hidrep_keyb_t * evkeyb = (void *)hidrep;
if ( efds == NULL ) { return -1; }
for ( i = 0; i < MAXEVDEVS; ++i )
{
if ( 0 > eventdevs[i] ) continue;
if ( ! ( FD_ISSET ( eventdevs[i], efds ) ) ) continue;
j = read ( eventdevs[i], buf, sizeof(struct input_event) );
if ( j == 0 )
{
if ( debugevents & 0x1 ) fprintf(stderr,".");
continue;
}
if ( -1 == j )
{
if ( debugevents & 0x1 )
{
if ( errno > 0 )
{
fprintf(stderr,"%d|%d(%s) (expected %d bytes). ",eventdevs[i],errno,strerror(errno), (int)sizeof(struct input_event));
}
else
{
fprintf(stderr,"j=-1,errno<=0...");
}
}
continue;
}
if ( sizeof(struct input_event) > j )
{
// exactly 24 on 64bit, (16 on 32bit): sizeof(struct input_event)
// chars expected != got: data invalid, drop it!
continue;
}
if ( debugevents & 0x4 )
fprintf(stderr," read(%d)from(%d) ", j, i );
if ( debugevents & 0x1 )
fprintf ( stdout, "EVENT{%04X %04X %08X}\n", inevent->type,
inevent->code, inevent->value );
switch ( inevent->type )
{
case EV_SYN:
break;
case EV_KEY:
u = 1; // Modifier keys
switch ( inevent->code )
{
// *** Mouse button events
case BTN_LEFT:
case BTN_RIGHT:
case BTN_MIDDLE:
c = 1 << (inevent->code & 0x03);
mousebuttons = mousebuttons & (0x07-c);
if ( inevent->value == 1 )
// Key has been pressed DOWN
{
mousebuttons=mousebuttons | c;
}
evmouse->btcode = 0xA1;
evmouse->rep_id = REPORTID_MOUSE;
evmouse->button = mousebuttons & 0x07;
evmouse->axis_x =
evmouse->axis_y =
evmouse->axis_z = 0;
if ( ! connectionok )
break;
j = send ( sockdesc, evmouse,
sizeof(struct hidrep_mouse_t),
MSG_NOSIGNAL );
if ( 1 > j )
{
return -1;
}
break;
// *** Special key: PAUSE
case KEY_PAUSE:
// When pressed: abort connection
if ( inevent->value == 0 )
{
if ( connectionok )
{
evkeyb->btcode=0xA1;
evkeyb->rep_id=REPORTID_KEYBD;
memset ( evkeyb->key, 0, 8 );
evkeyb->modify = 0;
j = send ( sockdesc, evkeyb,
sizeof(struct hidrep_keyb_t),
MSG_NOSIGNAL );
close ( sockdesc );
}
// If also LCtrl+Alt pressed:
// Terminate program
if (( modifierkeys & 0x5 ) == 0x5 )
{
return -99;
}
return -1;
}
break;
// *** "Modifier" key events
case KEY_RIGHTMETA:
u <<= 1;
case KEY_RIGHTALT:
u <<= 1;
case KEY_RIGHTSHIFT:
u <<= 1;
case KEY_RIGHTCTRL:
u <<= 1;
case KEY_LEFTMETA:
u <<= 1;
case KEY_LEFTALT:
u <<= 1;
case KEY_LEFTSHIFT:
u <<= 1;
case KEY_LEFTCTRL:
evkeyb->btcode = 0xA1;
evkeyb->rep_id = REPORTID_KEYBD;
memcpy ( evkeyb->key, pressedkey, 8 );
modifierkeys &= ( 0xff - u );
if ( inevent->value >= 1 )
{
modifierkeys |= u;
}
evkeyb->modify = modifierkeys;
j = send ( sockdesc, evkeyb,
sizeof(struct hidrep_keyb_t),
MSG_NOSIGNAL );
if ( 1 > j )
{
return -1;
}
break;
// *** Regular key events
case KEY_KPDOT: ++u; // Keypad Dot ~ 99
case KEY_KP0: ++u; // code 98...
case KEY_KP9: ++u; // countdown...
case KEY_KP8: ++u;
case KEY_KP7: ++u;
case KEY_KP6: ++u;
case KEY_KP5: ++u;
case KEY_KP4: ++u;
case KEY_KP3: ++u;
case KEY_KP2: ++u;
case KEY_KP1: ++u;
case KEY_KPENTER: ++u;
case KEY_KPPLUS: ++u;
case KEY_KPMINUS: ++u;
case KEY_KPASTERISK: ++u;
case KEY_KPSLASH: ++u;
case KEY_NUMLOCK: ++u;
case KEY_UP: ++u;
case KEY_DOWN: ++u;
case KEY_LEFT: ++u;
case KEY_RIGHT: ++u;
case KEY_PAGEDOWN: ++u;
case KEY_END: ++u;
case KEY_DELETE: ++u;
case KEY_PAGEUP: ++u;
case KEY_HOME: ++u;
case KEY_INSERT: ++u;
++u; //[Pause] key
// - checked separately
case KEY_SCROLLLOCK: ++u;
case KEY_SYSRQ: ++u; //[printscr]
case KEY_F12: ++u; //F12=> code 69
case KEY_F11: ++u;
case KEY_F10: ++u;
case KEY_F9: ++u;
case KEY_F8: ++u;
case KEY_F7: ++u;
case KEY_F6: ++u;
case KEY_F5: ++u;
case KEY_F4: ++u;
case KEY_F3: ++u;
case KEY_F2: ++u;
case KEY_F1: ++u;
case KEY_CAPSLOCK: ++u;
case KEY_SLASH: ++u;
case KEY_DOT: ++u;
case KEY_COMMA: ++u;
case KEY_GRAVE: ++u;
case KEY_APOSTROPHE: ++u;
case KEY_SEMICOLON: ++u;
case KEY_102ND: ++u;
case KEY_BACKSLASH: ++u;
case KEY_RIGHTBRACE: ++u;
case KEY_LEFTBRACE: ++u;
case KEY_EQUAL: ++u;
case KEY_MINUS: ++u;
case KEY_SPACE: ++u;
case KEY_TAB: ++u;
case KEY_BACKSPACE: ++u;
case KEY_ESC: ++u;
case KEY_ENTER: ++u; //Return=> code 40
case KEY_0: ++u;
case KEY_9: ++u;
case KEY_8: ++u;
case KEY_7: ++u;
case KEY_6: ++u;
case KEY_5: ++u;
case KEY_4: ++u;
case KEY_3: ++u;
case KEY_2: ++u;
case KEY_1: ++u;
case KEY_Z: ++u;
case KEY_Y: ++u;
case KEY_X: ++u;
case KEY_W: ++u;
case KEY_V: ++u;
case KEY_U: ++u;
case KEY_T: ++u;
case KEY_S: ++u;
case KEY_R: ++u;
case KEY_Q: ++u;
case KEY_P: ++u;
case KEY_O: ++u;
case KEY_N: ++u;
case KEY_M: ++u;
case KEY_L: ++u;
case KEY_K: ++u;
case KEY_J: ++u;
case KEY_I: ++u;
case KEY_H: ++u;
case KEY_G: ++u;
case KEY_F: ++u;
case KEY_E: ++u;
case KEY_D: ++u;
case KEY_C: ++u;
case KEY_B: ++u;
case KEY_A: u +=3; // A => 4
evkeyb->btcode = 0xA1;
evkeyb->rep_id = REPORTID_KEYBD;
if ( inevent->value == 1 )
{
// "Key down": Add to list of
// currently pressed keys
for ( j = 0; j < 8; ++j )
{
if (pressedkey[j] == 0)
{
pressedkey[j]=u;
j = 8;
}
else if(pressedkey[j] == u)
{
j = 8;
}
}
}
else if ( inevent->value == 0 )
{ // KEY UP: Remove from array
for ( j = 0; j < 8; ++j )
{
if ( pressedkey[j] == u )
{
while ( j < 7 )
{
pressedkey[j] =
pressedkey[j+1];
++j;
}
pressedkey[7] = 0;
}
}
}
else // "Key repeat" event
{
; // This should be handled
// by the remote side, not us.
}
memcpy ( evkeyb->key, pressedkey, 8 );
evkeyb->modify = modifierkeys;
if ( ! connectionok ) break;
j = send ( sockdesc, evkeyb,