forked from arduino-libraries/ArduinoBLE
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathATT.cpp
1963 lines (1579 loc) · 55.5 KB
/
ATT.cpp
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
/*
This file is part of the ArduinoBLE library.
Copyright (c) 2018 Arduino SA. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <Arduino.h>
#include "HCI.h"
#include "GATT.h"
#include "local/BLELocalAttribute.h"
#include "local/BLELocalCharacteristic.h"
#include "local/BLELocalDescriptor.h"
#include "local/BLELocalService.h"
#include "remote/BLERemoteDevice.h"
#include "remote/BLERemoteService.h"
#include "BLEProperty.h"
#include "ATT.h"
extern "C" int strcasecmp(char const *a, char const *b);
#define ATT_OP_ERROR 0x01
#define ATT_OP_MTU_REQ 0x02
#define ATT_OP_MTU_RESP 0x03
#define ATT_OP_FIND_INFO_REQ 0x04
#define ATT_OP_FIND_INFO_RESP 0x05
#define ATT_OP_FIND_BY_TYPE_REQ 0x06
#define ATT_OP_FIND_BY_TYPE_RESP 0x07
#define ATT_OP_READ_BY_TYPE_REQ 0x08
#define ATT_OP_READ_BY_TYPE_RESP 0x09
#define ATT_OP_READ_REQ 0x0a
#define ATT_OP_READ_RESP 0x0b
#define ATT_OP_READ_BLOB_REQ 0x0c
#define ATT_OP_READ_BLOB_RESP 0x0d
#define ATT_OP_READ_MULTI_REQ 0x0e
#define ATT_OP_READ_MULTI_RESP 0x0f
#define ATT_OP_READ_BY_GROUP_REQ 0x10
#define ATT_OP_READ_BY_GROUP_RESP 0x11
#define ATT_OP_WRITE_REQ 0x12
#define ATT_OP_WRITE_RESP 0x13
#define ATT_OP_WRITE_CMD 0x52
#define ATT_OP_PREP_WRITE_REQ 0x16
#define ATT_OP_PREP_WRITE_RESP 0x17
#define ATT_OP_EXEC_WRITE_REQ 0x18
#define ATT_OP_EXEC_WRITE_RESP 0x19
#define ATT_OP_HANDLE_NOTIFY 0x1b
#define ATT_OP_HANDLE_IND 0x1d
#define ATT_OP_HANDLE_CNF 0x1e
#define ATT_OP_SIGNED_WRITE_CMD 0xd2
#define ATT_ECODE_INVALID_HANDLE 0x01
#define ATT_ECODE_READ_NOT_PERM 0x02
#define ATT_ECODE_WRITE_NOT_PERM 0x03
#define ATT_ECODE_INVALID_PDU 0x04
#define ATT_ECODE_AUTHENTICATION 0x05
#define ATT_ECODE_REQ_NOT_SUPP 0x06
#define ATT_ECODE_INVALID_OFFSET 0x07
#define ATT_ECODE_AUTHORIZATION 0x08
#define ATT_ECODE_PREP_QUEUE_FULL 0x09
#define ATT_ECODE_ATTR_NOT_FOUND 0x0a
#define ATT_ECODE_ATTR_NOT_LONG 0x0b
#define ATT_ECODE_INSUFF_ENCR_KEY_SIZE 0x0c
#define ATT_ECODE_INVAL_ATTR_VALUE_LEN 0x0d
#define ATT_ECODE_UNLIKELY 0x0e
#define ATT_ECODE_INSUFF_ENC 0x0f
#define ATT_ECODE_UNSUPP_GRP_TYPE 0x10
#define ATT_ECODE_INSUFF_RESOURCES 0x11
// #define _BLE_TRACE_
ATTClass::ATTClass() :
_maxMtu(23),
_timeout(5000),
_longWriteHandle(0x0000),
_longWriteValue(NULL),
_longWriteValueLength(0)
{
for (int i = 0; i < ATT_MAX_PEERS; i++) {
_peers[i].connectionHandle = 0xffff;
_peers[i].role = 0x00;
_peers[i].addressType = 0x00;
memset(_peers[i].address, 0x00, sizeof(_peers[i].address));
_peers[i].mtu = 23;
_peers[i].device = NULL;
_peers[i].encryption = 0x0;
}
memset(_eventHandlers, 0x00, sizeof(_eventHandlers));
}
ATTClass::~ATTClass()
{
if (_longWriteValue) {
free(_longWriteValue);
}
}
bool ATTClass::connect(uint8_t peerBdaddrType, uint8_t peerBdaddr[6])
{
if (HCI.leCreateConn(0x0060, 0x0030, 0x00, peerBdaddrType, peerBdaddr, 0x00,
0x0006, 0x000c, 0x0000, 0x00c8, 0x0004, 0x0006) != 0) {
return false;
}
bool isConnected = false;
for (unsigned long start = millis(); (millis() - start) < _timeout;) {
HCI.poll();
isConnected = connected(peerBdaddrType, peerBdaddr);
if (isConnected) {
break;
}
}
if (!isConnected) {
HCI.leCancelConn();
}
return isConnected;
}
bool ATTClass::disconnect(uint8_t peerBdaddrType, uint8_t peerBdaddr[6])
{
uint16_t connHandle = connectionHandle(peerBdaddrType, peerBdaddr);
if (connHandle == 0xffff) {
return false;
}
HCI.disconnect(connHandle);
for (unsigned long start = millis(); (millis() - start) < _timeout;) {
HCI.poll();
if (!connected(connHandle)) {
return true;
}
}
return false;
}
bool ATTClass::discoverAttributes(uint8_t peerBdaddrType, uint8_t peerBdaddr[6], const char* serviceUuidFilter)
{
uint16_t connHandle = connectionHandle(peerBdaddrType, peerBdaddr);
if (connHandle == 0xffff) {
return false;
}
// send MTU request
if (!exchangeMtu(connHandle)) {
return false;
}
// find the device entry for the peeer
BLERemoteDevice* device = NULL;
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle == connHandle) {
if (_peers[i].device == NULL) {
_peers[i].device = new BLERemoteDevice();
}
device = _peers[i].device;
break;
}
}
if (device == NULL) {
return false;
}
if (serviceUuidFilter == NULL) {
// clear existing services
device->clearServices();
} else {
int serviceCount = device->serviceCount();
for (int i = 0; i < serviceCount; i++) {
BLERemoteService* service = device->service(i);
if (strcasecmp(service->uuid(), serviceUuidFilter) == 0) {
// found an existing service with same UUID
return true;
}
}
}
// discover services
if (!discoverServices(connHandle, device, serviceUuidFilter)) {
return false;
}
// discover characteristics
if (!discoverCharacteristics(connHandle, device)) {
return false;
}
// discover descriptors
if (!discoverDescriptors(connHandle, device)) {
return false;
}
return true;
}
void ATTClass::setMaxMtu(uint16_t maxMtu)
{
_maxMtu = maxMtu;
}
void ATTClass::setTimeout(unsigned long timeout)
{
_timeout = timeout;
}
void ATTClass::addConnection(uint16_t handle, uint8_t role, uint8_t peerBdaddrType,
uint8_t peerBdaddr[6], uint16_t /*interval*/,
uint16_t /*latency*/, uint16_t /*supervisionTimeout*/,
uint8_t /*masterClockAccuracy*/)
{
int peerIndex = -1;
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle == 0xffff) {
peerIndex = i;
break;
}
}
if (peerIndex == -1) {
// bail, no space
return;
}
_peers[peerIndex].connectionHandle = handle;
_peers[peerIndex].role = role;
_peers[peerIndex].mtu = 23;
_peers[peerIndex].addressType = peerBdaddrType;
memcpy(_peers[peerIndex].address, peerBdaddr, sizeof(_peers[peerIndex].address));
uint8_t BDADDr[6];
for(int i=0; i<6; i++) BDADDr[5-i] = peerBdaddr[i];
if(HCI.tryResolveAddress(BDADDr,_peers[peerIndex].resolvedAddress)){
#ifdef _BLE_TRACE_
Serial.println("Found match.");
#endif
}else{
#ifdef _BLE_TRACE_
Serial.println("No matching MAC");
#endif
memset(&_peers[peerIndex].resolvedAddress, 0, 6);
}
if (_eventHandlers[BLEConnected]) {
_eventHandlers[BLEConnected](BLEDevice(peerBdaddrType, peerBdaddr));
}
}
void ATTClass::handleData(uint16_t connectionHandle, uint8_t dlen, uint8_t data[])
{
uint8_t opcode = data[0];
dlen--;
data++;
uint16_t mtu = this->mtu(connectionHandle);
#ifdef _BLE_TRACE_
Serial.print("data opcode: 0x");
Serial.println(opcode, HEX);
#endif
switch (opcode) {
case ATT_OP_ERROR:
#ifdef _BLE_TRACE_
Serial.println("[Info] data error");
// Serial.print("Error: ");
// btct.printBytes(data, dlen);
#endif
error(connectionHandle, dlen, data);
break;
case ATT_OP_MTU_REQ:
#ifdef _BLE_TRACE_
Serial.println("MTU");
#endif
mtuReq(connectionHandle, dlen, data);
break;
case ATT_OP_MTU_RESP:
mtuResp(connectionHandle, dlen, data);
break;
case ATT_OP_FIND_INFO_REQ:
#ifdef _BLE_TRACE_
Serial.println("Find info");
#endif
findInfoReq(connectionHandle, mtu, dlen, data);
break;
case ATT_OP_FIND_INFO_RESP:
findInfoResp(connectionHandle, dlen, data);
break;
case ATT_OP_FIND_BY_TYPE_REQ:
findByTypeReq(connectionHandle, mtu, dlen, data);
break;
case ATT_OP_READ_BY_TYPE_REQ:
#ifdef _BLE_TRACE_
Serial.println("By type");
#endif
readByTypeReq(connectionHandle, mtu, dlen, data);
break;
case ATT_OP_READ_BY_TYPE_RESP:
readByTypeResp(connectionHandle, dlen, data);
break;
case ATT_OP_READ_BY_GROUP_REQ:
readByGroupReq(connectionHandle, mtu, dlen, data);
break;
case ATT_OP_READ_BY_GROUP_RESP:
readByGroupResp(connectionHandle, dlen, data);
break;
case ATT_OP_READ_REQ:
case ATT_OP_READ_BLOB_REQ:
readOrReadBlobReq(connectionHandle, mtu, opcode, dlen, data);
break;
case ATT_OP_READ_RESP:
readResp(connectionHandle, dlen, data);
break;
case ATT_OP_WRITE_REQ:
case ATT_OP_WRITE_CMD:
#ifdef _BLE_TRACE_
Serial.println("Write req");
#endif
writeReqOrCmd(connectionHandle, mtu, opcode, dlen, data);
break;
case ATT_OP_WRITE_RESP:
writeResp(connectionHandle, dlen, data);
break;
case ATT_OP_PREP_WRITE_REQ:
prepWriteReq(connectionHandle, mtu, dlen, data);
break;
case ATT_OP_EXEC_WRITE_REQ:
execWriteReq(connectionHandle, mtu, dlen, data);
break;
case ATT_OP_HANDLE_NOTIFY:
case ATT_OP_HANDLE_IND:
handleNotifyOrInd(connectionHandle, opcode, dlen, data);
break;
case ATT_OP_HANDLE_CNF:
handleCnf(connectionHandle, dlen, data);
break;
case ATT_OP_READ_MULTI_REQ:
case ATT_OP_SIGNED_WRITE_CMD:
default:
#ifdef _BLE_TRACE_
Serial.println("[Info] Unhandled dara");
#endif
sendError(connectionHandle, opcode, 0x00, ATT_ECODE_REQ_NOT_SUPP);
break;
}
}
void ATTClass::removeConnection(uint16_t handle, uint8_t /*reason*/)
{
int peerIndex = -1;
int peerCount = 0;
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle == handle) {
peerIndex = i;
}
if (_peers[i].connectionHandle != 0xffff) {
peerCount++;
}
}
if (peerIndex == -1) {
// bail not found
return;
}
BLEDevice bleDevice(_peers[peerIndex].addressType, _peers[peerIndex].address);
if (peerCount == 1) {
// clear CCCD values on disconnect
for (uint16_t i = 0; i < GATT.attributeCount(); i++) {
BLELocalAttribute* attribute = GATT.attribute(i);
if (attribute->type() == BLETypeCharacteristic) {
BLELocalCharacteristic* characteristic = (BLELocalCharacteristic*)attribute;
characteristic->writeCccdValue(bleDevice, 0x0000);
}
}
_longWriteHandle = 0x0000;
_longWriteValueLength = 0;
}
if (_eventHandlers[BLEDisconnected]) {
_eventHandlers[BLEDisconnected](bleDevice);
}
_peers[peerIndex].connectionHandle = 0xffff;
_peers[peerIndex].role = 0x00;
_peers[peerIndex].addressType = 0x00;
memset(_peers[peerIndex].address, 0x00, sizeof(_peers[peerIndex].address));
_peers[peerIndex].mtu = 23;
_peers[peerIndex].encryption = PEER_ENCRYPTION::NO_ENCRYPTION;
_peers[peerIndex].IOCap[0] = 0;
_peers[peerIndex].IOCap[1] = 0;
_peers[peerIndex].IOCap[2] = 0;
if (_peers[peerIndex].device) {
delete _peers[peerIndex].device;
}
_peers[peerIndex].device = NULL;
}
uint16_t ATTClass::connectionHandle(uint8_t addressType, const uint8_t address[6]) const
{
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].addressType == addressType && memcmp(_peers[i].address, address, 6) == 0) {
return _peers[i].connectionHandle;
}
}
return 0xffff;
}
BLERemoteDevice* ATTClass::device(uint8_t addressType, const uint8_t address[6]) const
{
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].addressType == addressType && memcmp(_peers[i].address, address, 6) == 0) {
return _peers[i].device;
}
}
return NULL;
}
bool ATTClass::connected() const
{
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle != 0xffff) {
return true;
}
}
return false;
}
bool ATTClass::connected(uint8_t addressType, const uint8_t address[6]) const
{
return (connectionHandle(addressType, address) != 0xffff);
}
bool ATTClass::connected(uint16_t handle) const
{
HCI.poll();
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle == handle) {
return true;
}
}
return false;
}
/*
* Return true if any of the known devices is paired (peer encrypted)
* Does not check if the paired device is also connected
*/
bool ATTClass::paired() const
{
for(int i=0; i<ATT_MAX_PEERS; i++){
if((_peers[i].encryption & PEER_ENCRYPTION::ENCRYPTED_AES) > 0){
return true;
}
}
return false;
}
/*
* Return true if the specified device is paired (peer encrypted)
*/
bool ATTClass::paired(uint16_t handle) const
{
for(int i=0; i<ATT_MAX_PEERS; i++){
if(_peers[i].connectionHandle != handle){continue;}
return (_peers[i].encryption & PEER_ENCRYPTION::ENCRYPTED_AES) > 0;
}
return false; // unknown handle
}
uint16_t ATTClass::mtu(uint16_t handle) const
{
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle == handle) {
return _peers[i].mtu;
}
}
return 23;
}
bool ATTClass::disconnect()
{
int numDisconnects = 0;
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle == 0xffff) {
continue;
}
if (HCI.disconnect(_peers[i].connectionHandle) != 0) {
continue;
}
numDisconnects++;
BLEDevice bleDevice(_peers[i].addressType, _peers[i].address);
// clear CCCD values on disconnect
for (uint16_t att = 0; att < GATT.attributeCount(); att++) {
BLELocalAttribute* attribute = GATT.attribute(att);
if (attribute->type() == BLETypeCharacteristic) {
BLELocalCharacteristic* characteristic = (BLELocalCharacteristic*)attribute;
characteristic->writeCccdValue(bleDevice, 0x0000);
}
}
_longWriteHandle = 0x0000;
_longWriteValueLength = 0;
_peers[i].connectionHandle = 0xffff;
_peers[i].role = 0x00;
_peers[i].addressType = 0x00;
memset(_peers[i].address, 0x00, sizeof(_peers[i].address));
memset(_peers[i].resolvedAddress, 0x00, sizeof(_peers[i].resolvedAddress));
_peers[i].mtu = 23;
if (_peers[i].device) {
delete _peers[i].device;
}
_peers[i].device = NULL;
}
return (numDisconnects > 0);
}
BLEDevice ATTClass::central()
{
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle == 0xffff || _peers[i].role != 0x01) {
continue;
}
return BLEDevice(_peers[i].addressType, _peers[i].address);
}
return BLEDevice();
}
bool ATTClass::handleNotify(uint16_t handle, const uint8_t* value, int length)
{
int numNotifications = 0;
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle == 0xffff) {
continue;
}
uint8_t notification[_peers[i].mtu];
uint16_t notificationLength = 0;
notification[0] = ATT_OP_HANDLE_NOTIFY;
notificationLength++;
memcpy(¬ification[1], &handle, sizeof(handle));
notificationLength += sizeof(handle);
length = min((uint16_t)(_peers[i].mtu - notificationLength), (uint16_t)length);
memcpy(¬ification[notificationLength], value, length);
notificationLength += length;
/// TODO: Set encryption requirement on notify.
HCI.sendAclPkt(_peers[i].connectionHandle, ATT_CID, notificationLength, notification);
numNotifications++;
}
return (numNotifications > 0);
}
bool ATTClass::handleInd(uint16_t handle, const uint8_t* value, int length)
{
int numIndications = 0;
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle == 0xffff) {
continue;
}
uint8_t indication[_peers[i].mtu];
uint16_t indicationLength = 0;
indication[0] = ATT_OP_HANDLE_IND;
indicationLength++;
memcpy(&indication[1], &handle, sizeof(handle));
indicationLength += sizeof(handle);
length = min((uint16_t)(_peers[i].mtu - indicationLength), (uint16_t)length);
memcpy(&indication[indicationLength], value, length);
indicationLength += length;
_cnf = false;
HCI.sendAclPkt(_peers[i].connectionHandle, ATT_CID, indicationLength, indication);
while (!_cnf) {
HCI.poll();
if (!connected(_peers[i].addressType, _peers[i].address)) {
break;
}
}
numIndications++;
}
return (numIndications > 0);
}
void ATTClass::error(uint16_t connectionHandle, uint8_t dlen, uint8_t data[])
{
if (dlen != 4) {
// drop
return;
}
struct __attribute__ ((packed)) AttError {
uint8_t opcode;
uint16_t handle;
uint8_t code;
} *attError = (AttError*)data;
if (_pendingResp.connectionHandle == connectionHandle && (_pendingResp.op - 1) == attError->opcode) {
_pendingResp.buffer[0] = ATT_OP_ERROR;
memcpy(&_pendingResp.buffer[1], data, dlen);
_pendingResp.length = dlen + 1;
}
}
void ATTClass::mtuReq(uint16_t connectionHandle, uint8_t dlen, uint8_t data[])
{
uint16_t mtu = *(uint16_t*)data;
if (dlen != 2) {
sendError(connectionHandle, ATT_OP_MTU_REQ, 0x0000, ATT_ECODE_INVALID_PDU);
return;
}
if (mtu > _maxMtu) {
mtu = _maxMtu;
}
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle == connectionHandle) {
_peers[i].mtu = mtu;
break;
}
}
struct __attribute__ ((packed)) {
uint8_t op;
uint16_t mtu;
} mtuResp = { ATT_OP_MTU_RESP, mtu };
HCI.sendAclPkt(connectionHandle, ATT_CID, sizeof(mtuResp), &mtuResp);
}
int ATTClass::mtuReq(uint16_t connectionHandle, uint16_t mtu, uint8_t responseBuffer[])
{
struct __attribute__ ((packed)) {
uint8_t op;
uint16_t mtu;
} mtuReq = { ATT_OP_MTU_REQ, mtu };
return sendReq(connectionHandle, &mtuReq, sizeof(mtuReq), responseBuffer);
}
void ATTClass::mtuResp(uint16_t connectionHandle, uint8_t dlen, uint8_t data[])
{
uint16_t mtu = *(uint16_t*)data;
if (dlen != 2) {
return;
}
for (int i = 0; i < ATT_MAX_PEERS; i++) {
if (_peers[i].connectionHandle == connectionHandle) {
_peers[i].mtu = mtu;
break;
}
}
if (connectionHandle == _pendingResp.connectionHandle && _pendingResp.op == ATT_OP_MTU_RESP) {
_pendingResp.buffer[0] = ATT_OP_MTU_RESP;
memcpy(&_pendingResp.buffer[1], data, dlen);
_pendingResp.length = dlen + 1;
}
}
void ATTClass::findInfoReq(uint16_t connectionHandle, uint16_t mtu, uint8_t dlen, uint8_t data[])
{
struct __attribute__ ((packed)) FindInfoReq {
uint16_t startHandle;
uint16_t endHandle;
} *findInfoReq = (FindInfoReq*)data;
if (dlen != sizeof(FindInfoReq)) {
sendError(connectionHandle, ATT_OP_FIND_INFO_REQ, findInfoReq->startHandle, ATT_ECODE_INVALID_PDU);
return;
}
uint8_t response[mtu];
uint16_t responseLength;
response[0] = ATT_OP_FIND_INFO_RESP;
response[1] = 0x00;
responseLength = 2;
for (uint16_t i = (findInfoReq->startHandle - 1); i < GATT.attributeCount() && i <= (findInfoReq->endHandle - 1); i++) {
BLELocalAttribute* attribute = GATT.attribute(i);
uint16_t handle = (i + 1);
bool isValueHandle = (attribute->type() == BLETypeCharacteristic) && (((BLELocalCharacteristic*)attribute)->valueHandle() == handle);
bool isDescriptor = attribute->type() == BLETypeDescriptor;
int uuidLen = (isValueHandle || isDescriptor) ? attribute->uuidLength() : BLE_ATTRIBUTE_TYPE_SIZE;
int infoType = (uuidLen == 2) ? 0x01 : 0x02;
if (response[1] == 0) {
response[1] = infoType;
}
if (response[1] != infoType) {
// different type
break;
}
// add the handle
memcpy(&response[responseLength], &handle, sizeof(handle));
responseLength += sizeof(handle);
if (isValueHandle || isDescriptor) {
// add the UUID
memcpy(&response[responseLength], attribute->uuidData(), uuidLen);
responseLength += uuidLen;
} else {
// add the type
uint16_t type = attribute->type();
memcpy(&response[responseLength], &type, sizeof(type));
responseLength += sizeof(type);
}
if ((responseLength + (2 + uuidLen)) > mtu) {
break;
}
}
if (responseLength == 2) {
sendError(connectionHandle, ATT_OP_FIND_INFO_REQ, findInfoReq->startHandle, ATT_ECODE_ATTR_NOT_FOUND);
} else {
HCI.sendAclPkt(connectionHandle, ATT_CID, responseLength, response);
}
}
int ATTClass::findInfoReq(uint16_t connectionHandle, uint16_t startHandle, uint16_t endHandle, uint8_t responseBuffer[])
{
struct __attribute__ ((packed)) {
uint8_t op;
uint16_t startHandle;
uint16_t endHandle;
} findInfoReq = { ATT_OP_FIND_INFO_REQ, startHandle, endHandle };
return sendReq(connectionHandle, &findInfoReq, sizeof(findInfoReq), responseBuffer);
}
void ATTClass::findInfoResp(uint16_t connectionHandle, uint8_t dlen, uint8_t data[])
{
if (dlen < 2) {
return; // invalid, drop
}
if (connectionHandle == _pendingResp.connectionHandle && _pendingResp.op == ATT_OP_FIND_INFO_RESP) {
_pendingResp.buffer[0] = ATT_OP_FIND_INFO_RESP;
memcpy(&_pendingResp.buffer[1], data, dlen);
_pendingResp.length = dlen + 1;
}
}
void ATTClass::findByTypeReq(uint16_t connectionHandle, uint16_t mtu, uint8_t dlen, uint8_t data[])
{
struct __attribute__ ((packed)) FindByTypeReq {
uint16_t startHandle;
uint16_t endHandle;
uint16_t type;
} *findByTypeReq = (FindByTypeReq*)data;
if (dlen < sizeof(FindByTypeReq)) {
sendError(connectionHandle, ATT_OP_FIND_BY_TYPE_REQ, findByTypeReq->startHandle, ATT_ECODE_INVALID_PDU);
return;
}
uint16_t valueLength = dlen - sizeof(*findByTypeReq);
uint8_t* value = &data[sizeof(*findByTypeReq)];
uint8_t response[mtu];
uint16_t responseLength;
response[0] = ATT_OP_FIND_BY_TYPE_RESP;
responseLength = 1;
if (findByTypeReq->type == BLETypeService) {
for (uint16_t i = (findByTypeReq->startHandle - 1); i < GATT.attributeCount() && i <= (findByTypeReq->endHandle - 1); i++) {
BLELocalAttribute* attribute = GATT.attribute(i);
if ((attribute->type() == findByTypeReq->type) && (attribute->uuidLength() == valueLength) && memcmp(attribute->uuidData(), value, valueLength) == 0) {
BLELocalService* service = (BLELocalService*)attribute;
// add the start handle
uint16_t startHandle = service->startHandle();
memcpy(&response[responseLength], &startHandle, sizeof(startHandle));
responseLength += sizeof(startHandle);
// add the end handle
uint16_t endHandle = service->endHandle();
memcpy(&response[responseLength], &endHandle, sizeof(endHandle));
responseLength += sizeof(endHandle);
}
if ((responseLength + 4) > mtu) {
break;
}
}
}
if (responseLength == 1) {
sendError(connectionHandle, ATT_OP_FIND_BY_TYPE_REQ, findByTypeReq->startHandle, ATT_ECODE_ATTR_NOT_FOUND);
} else {
HCI.sendAclPkt(connectionHandle, ATT_CID, responseLength, response);
}
}
void ATTClass::readByGroupReq(uint16_t connectionHandle, uint16_t mtu, uint8_t dlen, uint8_t data[])
{
struct __attribute__ ((packed)) ReadByGroupReq {
uint16_t startHandle;
uint16_t endHandle;
uint16_t uuid;
} *readByGroupReq = (ReadByGroupReq*)data;
#ifdef _BLE_TRACE_
Serial.print("readByGroupReq: start: 0x");
Serial.println(readByGroupReq->startHandle,HEX);
Serial.print("readByGroupReq: end: 0x");
Serial.println(readByGroupReq->endHandle,HEX);
Serial.print("readByGroupReq: UUID: 0x");
Serial.println(readByGroupReq->uuid,HEX);
#endif
if (dlen != sizeof(ReadByGroupReq) || (readByGroupReq->uuid != BLETypeService && readByGroupReq->uuid != 0x2801)) {
sendError(connectionHandle, ATT_OP_READ_BY_GROUP_REQ, readByGroupReq->startHandle, ATT_ECODE_UNSUPP_GRP_TYPE);
return;
}
uint8_t response[mtu];
uint16_t responseLength;
response[0] = ATT_OP_READ_BY_GROUP_RESP;
response[1] = 0x00;
responseLength = 2;
#ifdef _BLE_TRACE_
Serial.print("readByGroupReq: attrcount: ");
Serial.println(GATT.attributeCount());
#endif
for (uint16_t i = (readByGroupReq->startHandle - 1); i < GATT.attributeCount() && i <= (readByGroupReq->endHandle - 1); i++) {
BLELocalAttribute* attribute = GATT.attribute(i);
if (readByGroupReq->uuid != attribute->type()) {
// not the type
continue;
}
int uuidLen = attribute->uuidLength();
int infoSize = (uuidLen == 2) ? 6 : 20;
if (response[1] == 0) {
response[1] = infoSize;
}
if (response[1] != infoSize) {
// different size
break;
}
BLELocalService* service = (BLELocalService*)attribute;
// add the start handle
uint16_t startHandle = service->startHandle();
memcpy(&response[responseLength], &startHandle, sizeof(startHandle));
responseLength += sizeof(startHandle);
// add the end handle
uint16_t endHandle = service->endHandle();
memcpy(&response[responseLength], &endHandle, sizeof(endHandle));
responseLength += sizeof(endHandle);
// add the UUID
memcpy(&response[responseLength], service->uuidData(), uuidLen);
responseLength += uuidLen;
if ((responseLength + infoSize) > mtu) {
break;
}
}
if (responseLength == 2) {
sendError(connectionHandle, ATT_OP_READ_BY_GROUP_REQ, readByGroupReq->startHandle, ATT_ECODE_ATTR_NOT_FOUND);
} else {
HCI.sendAclPkt(connectionHandle, ATT_CID, responseLength, response);
}
}
int ATTClass::readByGroupReq(uint16_t connectionHandle, uint16_t startHandle, uint16_t endHandle, uint16_t uuid, uint8_t responseBuffer[])
{
struct __attribute__ ((packed)) {
uint8_t op;
uint16_t startHandle;
uint16_t endHandle;
uint16_t uuid;
} readByGroupReq = { ATT_OP_READ_BY_GROUP_REQ, startHandle, endHandle, uuid };
return sendReq(connectionHandle, &readByGroupReq, sizeof(readByGroupReq), responseBuffer);
}
void ATTClass::readByGroupResp(uint16_t connectionHandle, uint8_t dlen, uint8_t data[])
{
if (dlen < 2) {
return; // invalid, drop
}
if (connectionHandle == _pendingResp.connectionHandle && _pendingResp.op == ATT_OP_READ_BY_GROUP_RESP) {
_pendingResp.buffer[0] = ATT_OP_READ_BY_GROUP_RESP;
memcpy(&_pendingResp.buffer[1], data, dlen);
_pendingResp.length = dlen + 1;
}
}
void ATTClass::readOrReadBlobReq(uint16_t connectionHandle, uint16_t mtu, uint8_t opcode, uint8_t dlen, uint8_t data[])
{
if (opcode == ATT_OP_READ_REQ) {
if (dlen != sizeof(uint16_t)) {