Outline ![]()
Files ![]()
loading (4/5)...
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
/******************************************************************************
*
* Copyright (C) 2016 The Android Open Source Project
* Copyright (C) 2002-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* this file contains the connection interface functions
*
******************************************************************************/
#include "btm_int.h"
#include "hid_conn.h"
#include "hid_int.h"
#include "osi/allocator.h"
#include "osi/osi.h"
#include "stack/btm_api.h"
#include "stack/btu.h"
#include "stack/hidd_api.h"
#include "stack/hiddefs.h"
#include "stack/l2c_api.h"
#include "stack/l2cdefs.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if (HID_DEV_INCLUDED == TRUE)
static void hidd_l2cif_connect_ind(BD_ADDR bd_addr, uint16_t cid, uint16_t psm, uint8_t id);
static void hidd_l2cif_connect_cfm(uint16_t cid, uint16_t result);
static void hidd_l2cif_config_ind(uint16_t cid, tL2CAP_CFG_INFO *p_cfg);
static void hidd_l2cif_config_cfm(uint16_t cid, tL2CAP_CFG_INFO *p_cfg);
static void hidd_l2cif_disconnect_ind(uint16_t cid, bool ack_needed);
static void hidd_l2cif_disconnect_cfm(uint16_t cid, uint16_t result);
static void hidd_l2cif_data_ind(uint16_t cid, BT_HDR *p_msg);
static void hidd_l2cif_cong_ind(uint16_t cid, bool congested);
static const tL2CAP_APPL_INFO dev_reg_info = {hidd_l2cif_connect_ind,
hidd_l2cif_connect_cfm,
NULL,
hidd_l2cif_config_ind,
hidd_l2cif_config_cfm,
hidd_l2cif_disconnect_ind,
hidd_l2cif_disconnect_cfm,
NULL,
hidd_l2cif_data_ind,
hidd_l2cif_cong_ind,
NULL};
/*******************************************************************************
*
* Function hidd_check_config_done
*
* Description Checks if connection is configured and callback can be fired
*
* Returns void
*
******************************************************************************/
static void hidd_check_config_done(void)
{
tHID_CONN *p_hcon;
p_hcon = &hd_cb.device.conn;
if (((p_hcon->conn_flags & HID_CONN_FLAGS_ALL_CONFIGURED) == HID_CONN_FLAGS_ALL_CONFIGURED) &&
(p_hcon->conn_state == HID_CONN_STATE_CONFIG)) {
p_hcon->conn_state = HID_CONN_STATE_CONNECTED;
hd_cb.device.state = HIDD_DEV_CONNECTED;
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_OPEN, 0, NULL);
// send outstanding data on intr
if (hd_cb.pending_data) {
L2CA_DataWrite(p_hcon->intr_cid, hd_cb.pending_data);
hd_cb.pending_data = NULL;
}
}
}
/*******************************************************************************
*
* Function hidh_sec_check_complete_term
*
* Description HID security check complete callback function.
*
* Returns Send L2CA_ConnectRsp OK if secutiry check succeed; otherwise
* send security block L2C connection response.
*
******************************************************************************/
static void hidd_sec_check_complete(UNUSED_ATTR BD_ADDR bd_addr, UNUSED_ATTR tBT_TRANSPORT transport, void *p_ref_data,
uint8_t res)
{
tHID_DEV_DEV_CTB *p_dev = (tHID_DEV_DEV_CTB *)p_ref_data;
if (res == BTM_SUCCESS && p_dev->conn.conn_state == HID_CONN_STATE_SECURITY) {
p_dev->conn.disc_reason = HID_SUCCESS;
p_dev->conn.conn_state = HID_CONN_STATE_CONNECTING_INTR;
L2CA_ConnectRsp(p_dev->addr, p_dev->conn.ctrl_id, p_dev->conn.ctrl_cid, L2CAP_CONN_OK, L2CAP_CONN_OK);
L2CA_ConfigReq(p_dev->conn.ctrl_cid, &hd_cb.l2cap_cfg);
} else if (res != BTM_SUCCESS) {
HIDD_TRACE_WARNING("%s: connection rejected by security", __func__);
p_dev->conn.disc_reason = HID_ERR_AUTH_FAILED;
p_dev->conn.conn_state = HID_CONN_STATE_UNUSED;
L2CA_ConnectRsp(p_dev->addr, p_dev->conn.ctrl_id, p_dev->conn.ctrl_cid, L2CAP_CONN_SECURITY_BLOCK,
L2CAP_CONN_OK);
return;
}
}
/*******************************************************************************
*
* Function hidd_sec_check_complete_orig
*
* Description HID security check complete callback function (device
*originated)
*
* Returns void
*
******************************************************************************/
void hidd_sec_check_complete_orig(UNUSED_ATTR BD_ADDR bd_addr, UNUSED_ATTR tBT_TRANSPORT transport, void *p_ref_data,
uint8_t res)
{
tHID_DEV_DEV_CTB *p_dev = (tHID_DEV_DEV_CTB *)p_ref_data;
if (p_dev->conn.conn_state != HID_CONN_STATE_SECURITY) {
HIDD_TRACE_WARNING("%s: invalid state (%02x)", __func__, p_dev->conn.conn_state);
return;
}
if (res == BTM_SUCCESS) {
HIDD_TRACE_EVENT("%s: security ok", __func__);
p_dev->conn.disc_reason = HID_SUCCESS;
p_dev->conn.conn_state = HID_CONN_STATE_CONFIG;
L2CA_ConfigReq(p_dev->conn.ctrl_cid, &hd_cb.l2cap_cfg);
} else {
HIDD_TRACE_WARNING("%s: security check failed (%02x)", __func__, res);
p_dev->conn.disc_reason = HID_ERR_AUTH_FAILED;
hidd_conn_disconnect();
}
}
/*******************************************************************************
*
* Function hidd_l2cif_connect_ind
*
* Description Handles incoming L2CAP connection (we act as server)
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_connect_ind(BD_ADDR bd_addr, uint16_t cid, uint16_t psm, uint8_t id)
{
tHID_CONN *p_hcon;
tHID_DEV_DEV_CTB *p_dev;
bool accept = TRUE; // accept by default
HIDD_TRACE_EVENT("%s: psm=%04x cid=%04x id=%02x", __func__, psm, cid, id);
p_dev = &hd_cb.device;
if (!hd_cb.allow_incoming) {
HIDD_TRACE_WARNING("%s: incoming connections not allowed, rejecting", __func__);
L2CA_ConnectRsp(bd_addr, id, cid, L2CAP_CONN_NO_RESOURCES, 0);
return;
}
if (p_dev->in_use && memcmp(bd_addr, p_dev->addr, sizeof(BD_ADDR))) {
HIDD_TRACE_WARNING("%s: incoming connections from different device, rejecting", __func__);
L2CA_ConnectRsp(bd_addr, id, cid, L2CAP_CONN_NO_RESOURCES, 0);
return;
} else if (!p_dev->in_use) {
p_dev->in_use = TRUE;
memcpy(p_dev->addr, bd_addr, sizeof(BD_ADDR));
p_dev->state = HIDD_DEV_NO_CONN;
}
p_hcon = &hd_cb.device.conn;
switch (psm) {
case HID_PSM_INTERRUPT:
if (p_hcon->ctrl_cid == 0) {
accept = FALSE;
HIDD_TRACE_WARNING("%s: incoming INTR without CTRL, rejecting", __func__);
}
if (p_hcon->conn_state != HID_CONN_STATE_CONNECTING_INTR) {
accept = FALSE;
HIDD_TRACE_WARNING("%s: incoming INTR in invalid state (%d), rejecting", __func__, p_hcon->conn_state);
}
break;
case HID_PSM_CONTROL:
if (p_hcon->conn_state != HID_CONN_STATE_UNUSED) {
accept = FALSE;
HIDD_TRACE_WARNING("%s: incoming CTRL in invalid state (%d), rejecting", __func__, p_hcon->conn_state);
}
break;
default:
accept = FALSE;
HIDD_TRACE_ERROR("%s: received invalid PSM, rejecting", __func__);
break;
}
if (!accept) {
L2CA_ConnectRsp(bd_addr, id, cid, L2CAP_CONN_NO_RESOURCES, 0);
return;
}
// for CTRL we need to go through security and we reply in callback from there
if (psm == HID_PSM_CONTROL) {
p_hcon->conn_flags = 0;
p_hcon->ctrl_cid = cid;
p_hcon->ctrl_id = id;
p_hcon->disc_reason = HID_L2CAP_CONN_FAIL;
p_hcon->conn_state = HID_CONN_STATE_SECURITY;
if (btm_sec_mx_access_request(p_dev->addr, HID_PSM_CONTROL, FALSE, BTM_SEC_PROTO_HID, HIDD_NOSEC_CHN,
&hidd_sec_check_complete, p_dev) == BTM_CMD_STARTED) {
L2CA_ConnectRsp(bd_addr, id, cid, L2CAP_CONN_PENDING, L2CAP_CONN_OK);
}
return;
}
// for INTR we go directly to config state
p_hcon->conn_state = HID_CONN_STATE_CONFIG;
p_hcon->intr_cid = cid;
L2CA_ConnectRsp(bd_addr, id, cid, L2CAP_CONN_OK, L2CAP_CONN_OK);
L2CA_ConfigReq(cid, &hd_cb.l2cap_intr_cfg);
}
/*******************************************************************************
*
* Function hidd_l2cif_connect_cfm
*
* Description Handles L2CAP connection response (we act as client)
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_connect_cfm(uint16_t cid, uint16_t result)
{
tHID_DEV_DEV_CTB *p_dev = &hd_cb.device;
tHID_CONN *p_hcon = &hd_cb.device.conn;
HIDD_TRACE_EVENT("%s: cid=%04x result=%d, conn_state=%d", __func__, cid, result, p_hcon->conn_state);
if (p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid) {
HIDD_TRACE_WARNING("%s: unknown cid=%04x", __func__, cid);
return;
}
if (!(p_hcon->conn_flags & HID_CONN_FLAGS_IS_ORIG) ||
((cid == p_hcon->ctrl_cid) && (p_hcon->conn_state != HID_CONN_STATE_CONNECTING_CTRL && (p_hcon->conn_state != HID_CONN_STATE_DISCONNECTING_INTR))) ||
((cid == p_hcon->intr_cid) && (p_hcon->conn_state != HID_CONN_STATE_CONNECTING_INTR) && (p_hcon->conn_state != HID_CONN_STATE_DISCONNECTING_CTRL))) {
HIDD_TRACE_WARNING("%s: unexpected, cid:0x%04x, ctrl_cid:0x%04x, intr_cid:0x%04x, conn_state:%d", __func__, cid,
p_hcon->ctrl_cid, p_hcon->intr_cid, p_hcon->conn_state);
return;
}
if (result != L2CAP_CONN_OK) {
HIDD_TRACE_WARNING("%s: connection failed, now disconnect", __func__);
if (cid == p_hcon->ctrl_cid) {
p_hcon->ctrl_cid = 0;
} else {
p_hcon->intr_cid = 0;
}
hidd_conn_disconnect();
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE, HID_L2CAP_CONN_FAIL | (uint32_t)result, NULL);
return;
}
/* CTRL connect conf */
if (cid == p_hcon->ctrl_cid) {
p_hcon->conn_state = HID_CONN_STATE_SECURITY;
p_hcon->disc_reason = HID_L2CAP_CONN_FAIL; /* in case disconnected before sec completed */
btm_sec_mx_access_request(p_dev->addr, HID_PSM_CONTROL, TRUE, BTM_SEC_PROTO_HID, HIDD_SEC_CHN,
&hidd_sec_check_complete_orig, p_dev);
} else {
p_hcon->conn_state = HID_CONN_STATE_CONFIG;
L2CA_ConfigReq(cid, &hd_cb.l2cap_intr_cfg);
}
return;
}
/*******************************************************************************
*
* Function hidd_l2cif_config_ind
*
* Description Handles incoming L2CAP configuration request
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_config_ind(uint16_t cid, tL2CAP_CFG_INFO *p_cfg)
{
tHID_CONN *p_hcon;
HIDD_TRACE_EVENT("%s: cid=%04x", __func__, cid);
p_hcon = &hd_cb.device.conn;
if (p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid) {
HIDD_TRACE_WARNING("%s: unknown cid=%04x", __func__, cid);
return;
}
if ((!p_cfg->mtu_present) || (p_cfg->mtu > HID_DEV_MTU_SIZE))
p_hcon->rem_mtu_size = HID_DEV_MTU_SIZE;
else
p_hcon->rem_mtu_size = p_cfg->mtu;
// accept without changes
p_cfg->flush_to_present = FALSE;
p_cfg->mtu_present = FALSE;
p_cfg->result = L2CAP_CFG_OK;
if (cid == p_hcon->intr_cid && hd_cb.use_in_qos && !p_cfg->qos_present) {
p_cfg->qos_present = TRUE;
memcpy(&p_cfg->qos, &hd_cb.in_qos, sizeof(FLOW_SPEC));
}
L2CA_ConfigRsp(cid, p_cfg);
// update flags
if (cid == p_hcon->ctrl_cid) {
p_hcon->conn_flags |= HID_CONN_FLAGS_HIS_CTRL_CFG_DONE;
if ((p_hcon->conn_flags & HID_CONN_FLAGS_IS_ORIG) && (p_hcon->conn_flags & HID_CONN_FLAGS_MY_CTRL_CFG_DONE) &&
(p_hcon->conn_state != HID_CONN_STATE_CONNECTING_INTR)) {
p_hcon->disc_reason = HID_L2CAP_CONN_FAIL;
if ((p_hcon->intr_cid = L2CA_ConnectReq(HID_PSM_INTERRUPT, hd_cb.device.addr)) == 0) {
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
hidd_conn_disconnect();
HIDD_TRACE_WARNING("%s: could not start L2CAP connection for INTR", __func__);
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE, HID_ERR_L2CAP_FAILED, NULL);
return;
} else {
p_hcon->conn_state = HID_CONN_STATE_CONNECTING_INTR;
}
}
} else {
p_hcon->conn_flags |= HID_CONN_FLAGS_HIS_INTR_CFG_DONE;
}
hidd_check_config_done();
}
/*******************************************************************************
*
* Function hidd_l2cif_config_cfm
*
* Description Handles incoming L2CAP configuration response
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_config_cfm(uint16_t cid, tL2CAP_CFG_INFO *p_cfg)
{
tHID_CONN *p_hcon;
uint32_t reason;
HIDD_TRACE_EVENT("%s: cid=%04x pcfg->result=%d", __func__, cid, p_cfg->result);
p_hcon = &hd_cb.device.conn;
if (p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid) {
HIDD_TRACE_WARNING("%s: unknown cid=%04x", __func__, cid);
return;
}
if (p_hcon->intr_cid == cid && p_cfg->result == L2CAP_CFG_UNACCEPTABLE_PARAMS && p_cfg->qos_present) {
tL2CAP_CFG_INFO new_qos;
// QoS parameters not accepted for intr, try again with host proposal
memcpy(&new_qos, &hd_cb.l2cap_intr_cfg, sizeof(new_qos));
memcpy(&new_qos.qos, &p_cfg->qos, sizeof(FLOW_SPEC));
new_qos.qos_present = TRUE;
HIDD_TRACE_WARNING("%s: config failed, retry", __func__);
L2CA_ConfigReq(cid, &new_qos);
return;
} else if (p_hcon->intr_cid == cid && p_cfg->result == L2CAP_CFG_UNKNOWN_OPTIONS) {
// QoS not understood by remote device, try configuring without QoS
HIDD_TRACE_WARNING("%s: config failed, retry without QoS", __func__);
L2CA_ConfigReq(cid, &hd_cb.l2cap_cfg);
return;
} else if (p_cfg->result != L2CAP_CFG_OK) {
HIDD_TRACE_WARNING("%s: config failed, disconnecting", __func__);
hidd_conn_disconnect();
reason = HID_L2CAP_CFG_FAIL | (uint32_t)p_cfg->result;
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE, reason, NULL);
return;
}
// update flags
if (cid == p_hcon->ctrl_cid) {
p_hcon->conn_flags |= HID_CONN_FLAGS_MY_CTRL_CFG_DONE;
if ((p_hcon->conn_flags & HID_CONN_FLAGS_IS_ORIG) && (p_hcon->conn_flags & HID_CONN_FLAGS_HIS_CTRL_CFG_DONE) &&
(p_hcon->conn_state != HID_CONN_STATE_CONNECTING_INTR)) {
p_hcon->disc_reason = HID_L2CAP_CONN_FAIL;
if ((p_hcon->intr_cid = L2CA_ConnectReq(HID_PSM_INTERRUPT, hd_cb.device.addr)) == 0) {
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
hidd_conn_disconnect();
HIDD_TRACE_WARNING("%s: could not start L2CAP connection for INTR", __func__);
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE, HID_ERR_L2CAP_FAILED, NULL);
return;
} else {
p_hcon->conn_state = HID_CONN_STATE_CONNECTING_INTR;
}
}
} else {
p_hcon->conn_flags |= HID_CONN_FLAGS_MY_INTR_CFG_DONE;
}
hidd_check_config_done();
}
/*******************************************************************************
*
* Function hidd_l2cif_disconnect_ind
*
* Description Handler incoming L2CAP disconnection request
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_disconnect_ind(uint16_t cid, bool ack_needed)
{
tHID_CONN *p_hcon;
HIDD_TRACE_EVENT("%s: cid=%04x ack_needed=%d", __func__, cid, ack_needed);
p_hcon = &hd_cb.device.conn;
if (p_hcon->conn_state == HID_CONN_STATE_UNUSED || (p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid)) {
HIDD_TRACE_WARNING("%s: unknown cid=%04x", __func__, cid);
return;
}
if (ack_needed) {
L2CA_DisconnectRsp(cid);
}
if (cid == p_hcon->ctrl_cid) {
p_hcon->ctrl_cid = 0;
p_hcon->conn_state = HID_CONN_STATE_DISCONNECTING_CTRL;
} else {
p_hcon->intr_cid = 0;
p_hcon->conn_state = HID_CONN_STATE_DISCONNECTING_INTR;
}
if ((p_hcon->ctrl_cid == 0) && (p_hcon->intr_cid == 0)) {
HIDD_TRACE_EVENT("%s: INTR and CTRL disconnected", __func__);
// clean any outstanding data on intr
if (hd_cb.pending_data) {
osi_free(hd_cb.pending_data);
hd_cb.pending_data = NULL;
}
hd_cb.device.state = HIDD_DEV_NO_CONN;
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE, p_hcon->disc_reason, NULL);
}
}
/*******************************************************************************
*
* Function hidd_l2cif_disconnect_cfm
*
* Description Handles L2CAP disconnection response
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_disconnect_cfm(uint16_t cid, uint16_t result)
{
tHID_CONN *p_hcon;
HIDD_TRACE_EVENT("%s: cid=%04x result=%d", __func__, cid, result);
p_hcon = &hd_cb.device.conn;
if (p_hcon->conn_state == HID_CONN_STATE_UNUSED || (p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid)) {
HIDD_TRACE_WARNING("%s: unknown cid=%04x", __func__, cid);
return;
}
if (cid == p_hcon->ctrl_cid) {
p_hcon->ctrl_cid = 0;
} else {
p_hcon->intr_cid = 0;
// now disconnect CTRL
L2CA_DisconnectReq(p_hcon->ctrl_cid);
}
if ((p_hcon->ctrl_cid == 0) && (p_hcon->intr_cid == 0)) {
HIDD_TRACE_EVENT("%s: INTR and CTRL disconnected", __func__);
hd_cb.device.state = HIDD_DEV_NO_CONN;
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
if (hd_cb.pending_vc_unplug) {
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_VC_UNPLUG, p_hcon->disc_reason, NULL);
hd_cb.pending_vc_unplug = FALSE;
} else {
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE, p_hcon->disc_reason, NULL);
}
}
}
/*******************************************************************************
*
* Function hidd_l2cif_cong_ind
*
* Description Handles L2CAP congestion status event
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_cong_ind(uint16_t cid, bool congested)
{
tHID_CONN *p_hcon;
HIDD_TRACE_EVENT("%s: cid=%04x congested=%d", __func__, cid, congested);
p_hcon = &hd_cb.device.conn;
if (p_hcon->conn_state == HID_CONN_STATE_UNUSED || (p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid)) {
HIDD_TRACE_WARNING("%s: unknown cid=%04x", __func__, cid);
return;
}
if (congested) {
p_hcon->conn_flags |= HID_CONN_FLAGS_CONGESTED;
} else {
p_hcon->conn_flags &= ~HID_CONN_FLAGS_CONGESTED;
}
}
/*******************************************************************************
*
* Function hidd_l2cif_data_ind
*
* Description Handler incoming data on L2CAP channel
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_data_ind(uint16_t cid, BT_HDR *p_msg)
{
tHID_CONN *p_hcon;
uint8_t *p_data = (uint8_t *)(p_msg + 1) + p_msg->offset;
uint8_t msg_type, param;
bool err = FALSE;
HIDD_TRACE_EVENT("%s: cid=%04x", __func__, cid);
p_hcon = &hd_cb.device.conn;
if (p_hcon->conn_state == HID_CONN_STATE_UNUSED || (p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid)) {
HIDD_TRACE_WARNING("%s: unknown cid=%04x", __func__, cid);
osi_free(p_msg);
return;
}
msg_type = HID_GET_TRANS_FROM_HDR(*p_data);
param = HID_GET_PARAM_FROM_HDR(*p_data);
if (msg_type == HID_TRANS_DATA && cid == p_hcon->intr_cid) {
// skip HID header
p_msg->offset++;
p_msg->len--;
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_INTR_DATA, 0, p_msg);
return;
}
switch (msg_type) {
case HID_TRANS_GET_REPORT:
// at this stage we don't know if Report Id shall be included in request
// so we pass complete packet in callback and let other code analyze this
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_GET_REPORT, !!(param & HID_PAR_GET_REP_BUFSIZE_FOLLOWS), p_msg);
break;
case HID_TRANS_SET_REPORT:
// as above
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_SET_REPORT, 0, p_msg);
break;
case HID_TRANS_GET_IDLE:
hidd_conn_send_data(HID_CHANNEL_CTRL, HID_TRANS_DATA, HID_PAR_REP_TYPE_OTHER, hd_cb.device.idle_time, 0, NULL);
osi_free(p_msg);
break;
case HID_TRANS_SET_IDLE:
if (p_msg->len != 2) {
HIDD_TRACE_ERROR("%s: invalid len (%d) set idle request received", __func__, p_msg->len);
err = TRUE;
} else {
hd_cb.device.idle_time = p_data[1];
HIDD_TRACE_DEBUG("%s: idle_time = %d", __func__, hd_cb.device.idle_time);
if (hd_cb.device.idle_time) {
HIDD_TRACE_WARNING("%s: idle_time of %d ms not supported by HID Device", __func__,
(hd_cb.device.idle_time * 4));
err = TRUE;
}
}
if (!err) {
hidd_conn_send_data(0, HID_TRANS_HANDSHAKE, HID_PAR_HANDSHAKE_RSP_SUCCESS, 0, 0, NULL);
} else {
hidd_conn_send_data(0, HID_TRANS_HANDSHAKE, HID_PAR_HANDSHAKE_RSP_ERR_INVALID_PARAM, 0, 0, NULL);
}
osi_free(p_msg);
break;
case HID_TRANS_GET_PROTOCOL:
hidd_conn_send_data(HID_CHANNEL_CTRL, HID_TRANS_DATA, HID_PAR_REP_TYPE_OTHER, !hd_cb.device.boot_mode, 0, NULL);
osi_free(p_msg);
break;
case HID_TRANS_SET_PROTOCOL:
hd_cb.device.boot_mode = !(param & HID_PAR_PROTOCOL_MASK);
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_SET_PROTOCOL, param & HID_PAR_PROTOCOL_MASK, NULL);
hidd_conn_send_data(0, HID_TRANS_HANDSHAKE, HID_PAR_HANDSHAKE_RSP_SUCCESS, 0, 0, NULL);
osi_free(p_msg);
break;
case HID_TRANS_CONTROL:
switch (param) {
case HID_PAR_CONTROL_SUSPEND:
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_SUSPEND, 0, NULL);
break;
case HID_PAR_CONTROL_EXIT_SUSPEND:
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_EXIT_SUSPEND, 0, NULL);
break;
case HID_PAR_CONTROL_VIRTUAL_CABLE_UNPLUG:
hidd_conn_disconnect();
// set flag so we can notify properly when disconnected
hd_cb.pending_vc_unplug = TRUE;
break;
}
osi_free(p_msg);
break;
case HID_TRANS_DATA:
default:
HIDD_TRACE_WARNING("%s: got unsupported msg (%d)", __func__, msg_type);
hidd_conn_send_data(0, HID_TRANS_HANDSHAKE, HID_PAR_HANDSHAKE_RSP_ERR_UNSUPPORTED_REQ, 0, 0, NULL);
osi_free(p_msg);
break;
}
}
/*******************************************************************************
*
* Function hidd_conn_reg
*
* Description Registers L2CAP channels
*
* Returns void
*
******************************************************************************/
tHID_STATUS hidd_conn_reg(void)
{
HIDD_TRACE_API("%s", __func__);
memset(&hd_cb.l2cap_cfg, 0, sizeof(tL2CAP_CFG_INFO));
hd_cb.l2cap_cfg.mtu_present = TRUE;
hd_cb.l2cap_cfg.mtu = HID_DEV_MTU_SIZE;
hd_cb.l2cap_cfg.flush_to_present = TRUE;
hd_cb.l2cap_cfg.flush_to = HID_DEV_FLUSH_TO;
memset(&hd_cb.l2cap_intr_cfg, 0, sizeof(tL2CAP_CFG_INFO));
hd_cb.l2cap_intr_cfg.mtu_present = TRUE;
hd_cb.l2cap_intr_cfg.mtu = HID_DEV_MTU_SIZE;
hd_cb.l2cap_intr_cfg.flush_to_present = TRUE;
hd_cb.l2cap_intr_cfg.flush_to = HID_DEV_FLUSH_TO;
if (!L2CA_Register(HID_PSM_CONTROL, (tL2CAP_APPL_INFO *)&dev_reg_info)) {
HIDD_TRACE_ERROR("HID Control (device) registration failed");
return (HID_ERR_L2CAP_FAILED);
}
if (!L2CA_Register(HID_PSM_INTERRUPT, (tL2CAP_APPL_INFO *)&dev_reg_info)) {
L2CA_Deregister(HID_PSM_CONTROL);
HIDD_TRACE_ERROR("HID Interrupt (device) registration failed");
return (HID_ERR_L2CAP_FAILED);
}
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function hidd_conn_dereg
*
* Description Deregisters L2CAP channels
*
* Returns void
*
******************************************************************************/
void hidd_conn_dereg(void)
{
HIDD_TRACE_API("%s", __func__);
L2CA_Deregister(HID_PSM_CONTROL);
L2CA_Deregister(HID_PSM_INTERRUPT);
}
/*******************************************************************************
*
* Function hidd_conn_initiate
*
* Description Initiates HID connection to plugged device
*
* Returns HID_SUCCESS
*
******************************************************************************/
tHID_STATUS hidd_conn_initiate(void)
{
tHID_DEV_DEV_CTB *p_dev = &hd_cb.device;
HIDD_TRACE_API("%s", __func__);
if (!p_dev->in_use) {
HIDD_TRACE_WARNING("%s: no virtual cable established", __func__);
return (HID_ERR_NOT_REGISTERED);
}
if (p_dev->conn.conn_state != HID_CONN_STATE_UNUSED) {
HIDD_TRACE_WARNING("%s: connection already in progress", __func__);
return (HID_ERR_CONN_IN_PROCESS);
}
p_dev->conn.ctrl_cid = 0;
p_dev->conn.intr_cid = 0;
p_dev->conn.disc_reason = HID_L2CAP_CONN_FAIL;
p_dev->conn.conn_flags |= HID_CONN_FLAGS_IS_ORIG;
BTM_SetOutService(p_dev->addr, BTM_SEC_SERVICE_HIDD_SEC_CTRL, HIDD_SEC_CHN);
/* Check if L2CAP started the connection process */
if ((p_dev->conn.ctrl_cid = L2CA_ConnectReq(HID_PSM_CONTROL, p_dev->addr)) == 0) {
HIDD_TRACE_WARNING("%s: could not start L2CAP connection", __func__);
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE, HID_ERR_L2CAP_FAILED, NULL);
} else {
p_dev->conn.conn_state = HID_CONN_STATE_CONNECTING_CTRL;
}
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function hidd_conn_disconnect
*
* Description Disconnects existing HID connection
*
* Returns HID_SUCCESS
*
******************************************************************************/
tHID_STATUS hidd_conn_disconnect(void)
{
tHID_CONN *p_hcon;
HIDD_TRACE_API("%s", __func__);
// clean any outstanding data on intr
if (hd_cb.pending_data) {
osi_free(hd_cb.pending_data);
hd_cb.pending_data = NULL;
}
p_hcon = &hd_cb.device.conn;
if ((p_hcon->ctrl_cid != 0) || (p_hcon->intr_cid != 0)) {
/* Set l2cap idle timeout to 0 (so ACL link is disconnected
* immediately after last channel is closed) */
L2CA_SetIdleTimeoutByBdAddr(hd_cb.device.addr, 0, BT_TRANSPORT_BR_EDR);
if (p_hcon->intr_cid) {
p_hcon->conn_state = HID_CONN_STATE_DISCONNECTING_INTR;
L2CA_DisconnectReq(p_hcon->intr_cid);
} else if (p_hcon->ctrl_cid) {
p_hcon->conn_state = HID_CONN_STATE_DISCONNECTING_CTRL;
L2CA_DisconnectReq(p_hcon->ctrl_cid);
}
} else {
HIDD_TRACE_WARNING("%s: already disconnected", __func__);
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
}
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function hidd_conn_send_data
*
* Description Sends data to host
*
* Returns tHID_STATUS
*
******************************************************************************/
tHID_STATUS hidd_conn_send_data(uint8_t channel, uint8_t msg_type, uint8_t param, uint8_t data, uint16_t len,
uint8_t *p_data)
{
tHID_CONN *p_hcon;
BT_HDR *p_buf;
uint8_t *p_out;
uint16_t cid;
uint16_t buf_size;
HIDD_TRACE_VERBOSE("%s: channel(%d), msg_type(%d), len(%d)", __func__, channel, msg_type, len);
p_hcon = &hd_cb.device.conn;
if (p_hcon->conn_flags & HID_CONN_FLAGS_CONGESTED) {
return HID_ERR_CONGESTED;
}
switch (msg_type) {
case HID_TRANS_HANDSHAKE:
case HID_TRANS_CONTROL:
cid = p_hcon->ctrl_cid;
buf_size = HID_CONTROL_BUF_SIZE;
break;
case HID_TRANS_DATA:
if (channel == HID_CHANNEL_CTRL) {
cid = p_hcon->ctrl_cid;
buf_size = HID_CONTROL_BUF_SIZE;
} else {
cid = p_hcon->intr_cid;
buf_size = HID_INTERRUPT_BUF_SIZE;
}
break;
default:
return (HID_ERR_INVALID_PARAM);
}
p_buf = (BT_HDR *)osi_malloc(buf_size);
if (p_buf == NULL)
return (HID_ERR_NO_RESOURCES);
p_buf->offset = L2CAP_MIN_OFFSET;
p_out = (uint8_t *)(p_buf + 1) + p_buf->offset;
*p_out = HID_BUILD_HDR(msg_type, param);
p_out++;
p_buf->len = 1; // start with header only
// add report id prefix only if non-zero (which is reserved)
if (msg_type == HID_TRANS_DATA && (data || param == HID_PAR_REP_TYPE_OTHER)) {
*p_out = data; // report_id
p_out++;
p_buf->len++;
}
if (len > 0 && p_data != NULL) {
memcpy(p_out, p_data, len);
p_buf->len += len;
}
// check if connected
if (hd_cb.device.state != HIDD_DEV_CONNECTED) {
// for DATA on intr we hold transfer and try to reconnect
if (msg_type == HID_TRANS_DATA && cid == p_hcon->intr_cid) {
// drop previous data, we do not queue it for now
if (hd_cb.pending_data) {
osi_free(hd_cb.pending_data);
}
hd_cb.pending_data = p_buf;
if (hd_cb.device.conn.conn_state == HID_CONN_STATE_UNUSED) {
HIDD_TRACE_WARNING("%s: try to reconnect!", __func__);
return hidd_conn_initiate();
}
return HID_SUCCESS;
}
return HID_ERR_NO_CONNECTION;
}
#ifdef REPORT_TRANSFER_TIMESTAMP
if (report_transfer) {
HIDD_TRACE_ERROR("%s: report sent", __func__);
}
#endif
HIDD_TRACE_VERBOSE("%s: report sent", __func__);
if (L2CA_DataWrite(cid, p_buf) == L2CAP_DW_FAILED)
return (HID_ERR_CONGESTED);
return (HID_SUCCESS);
}
#endif
Details ![]()
Show: from Types: Columns: ![]( "Show Project Names")
![]( "Show Locations")
![]( "Show Referring Symbols")
![]( "Show Scope")
This file uses the notable symbols shown below. Click anywhere in the file to view more details.