Outline ![]()
Files ![]()
loading...
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
/******************************************************************************
*
* Copyright (C) 2003-2012 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 module contains action functions of the link control state machine.
*
******************************************************************************/
#include <string.h>
#include "stack/bt_types.h"
#include "common/bt_target.h"
#include "common/bt_defs.h"
#include "stack/avct_api.h"
#include "avct_int.h"
#include "stack/btm_api.h"
#include "osi/allocator.h"
#if (defined(AVCT_INCLUDED) && AVCT_INCLUDED == TRUE)
/* packet header length lookup table */
const UINT8 avct_lcb_pkt_type_len[] = {
AVCT_HDR_LEN_SINGLE,
AVCT_HDR_LEN_START,
AVCT_HDR_LEN_CONT,
AVCT_HDR_LEN_END
};
/*******************************************************************************
**
** Function avct_lcb_msg_asmbl
**
** Description Reassemble incoming message.
**
**
** Returns Pointer to reassembled message; NULL if no message
** available.
**
*******************************************************************************/
static BT_HDR *avct_lcb_msg_asmbl(tAVCT_LCB *p_lcb, BT_HDR *p_buf)
{
UINT8 *p;
UINT8 pkt_type;
BT_HDR *p_ret;
UINT16 buf_len;
/* parse the message header */
p = (UINT8 *)(p_buf + 1) + p_buf->offset;
AVCT_PRS_PKT_TYPE(p, pkt_type);
/* quick sanity check on length */
if (p_buf->len < avct_lcb_pkt_type_len[pkt_type]) {
osi_free(p_buf);
AVCT_TRACE_WARNING("Bad length during reassembly");
p_ret = NULL;
}
/* single packet */
else if (pkt_type == AVCT_PKT_TYPE_SINGLE) {
/* if reassembly in progress drop message and process new single */
if (p_lcb->p_rx_msg != NULL) {
AVCT_TRACE_WARNING("Got single during reassembly");
}
osi_free(p_lcb->p_rx_msg);
p_lcb->p_rx_msg = NULL;
p_ret = p_buf;
}
/* start packet */
else if (pkt_type == AVCT_PKT_TYPE_START) {
/* if reassembly in progress drop message and process new start */
if (p_lcb->p_rx_msg != NULL) {
AVCT_TRACE_WARNING("Got start during reassembly");
}
osi_free(p_lcb->p_rx_msg);
/* Allocate bigger buffer for reassembly. As lower layers are
* not aware of possible packet size after reassembly they
* would have allocated smaller buffer.
*/
p_lcb->p_rx_msg = (BT_HDR *)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
if (p_lcb->p_rx_msg == NULL) {
AVCT_TRACE_ERROR ("Cannot alloc buffer for reassembly !!");
osi_free(p_buf);
} else {
memcpy (p_lcb->p_rx_msg, p_buf,
sizeof(BT_HDR) + p_buf->offset + p_buf->len);
/* Free original buffer */
osi_free(p_buf);
/* update p to point to new buffer */
p = (UINT8 *)(p_lcb->p_rx_msg + 1) + p_lcb->p_rx_msg->offset;
/* copy first header byte over nosp */
*(p + 1) = *p;
/* set offset to point to where to copy next */
p_lcb->p_rx_msg->offset += p_lcb->p_rx_msg->len;
/* adjust length for packet header */
p_lcb->p_rx_msg->len -= 1;
}
p_ret = NULL;
}
/* continue or end */
else {
/* if no reassembly in progress drop message */
if (p_lcb->p_rx_msg == NULL) {
osi_free(p_buf);
AVCT_TRACE_WARNING("Pkt type=%d out of order", pkt_type);
p_ret = NULL;
} else {
/* get size of buffer holding assembled message */
/*
* NOTE: The buffer is allocated above at the beginning of the
* reassembly, and is always of size BT_DEFAULT_BUFFER_SIZE.
*/
buf_len = BT_DEFAULT_BUFFER_SIZE - sizeof(BT_HDR);
/* adjust offset and len of fragment for header byte */
p_buf->offset += AVCT_HDR_LEN_CONT;
p_buf->len -= AVCT_HDR_LEN_CONT;
/* verify length */
if ((p_lcb->p_rx_msg->offset + p_buf->len) > buf_len) {
/* won't fit; free everything */
AVCT_TRACE_WARNING("%s: Fragmented message too big!", __func__);
osi_free(p_lcb->p_rx_msg);
p_lcb->p_rx_msg = NULL;
osi_free(p_buf);
p_ret = NULL;
} else {
/* copy contents of p_buf to p_rx_msg */
memcpy((UINT8 *)(p_lcb->p_rx_msg + 1) + p_lcb->p_rx_msg->offset,
(UINT8 *)(p_buf + 1) + p_buf->offset, p_buf->len);
if (pkt_type == AVCT_PKT_TYPE_END) {
p_lcb->p_rx_msg->offset -= p_lcb->p_rx_msg->len;
p_lcb->p_rx_msg->len += p_buf->len;
p_ret = p_lcb->p_rx_msg;
p_lcb->p_rx_msg = NULL;
} else {
p_lcb->p_rx_msg->offset += p_buf->len;
p_lcb->p_rx_msg->len += p_buf->len;
p_ret = NULL;
}
osi_free(p_buf);
}
}
}
return p_ret;
}
/*******************************************************************************
**
** Function avct_lcb_chnl_open
**
** Description Open L2CAP channel to peer
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_chnl_open(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
UINT16 result = AVCT_RESULT_FAIL;
UNUSED(p_data);
BTM_SetOutService(p_lcb->peer_addr, BTM_SEC_SERVICE_AVCTP, 0);
/* call l2cap connect req */
p_lcb->ch_state = AVCT_CH_CONN;
if ((p_lcb->ch_lcid = L2CA_ConnectReq(AVCT_PSM, p_lcb->peer_addr)) == 0) {
/* if connect req failed, send ourselves close event */
avct_lcb_event(p_lcb, AVCT_LCB_LL_CLOSE_EVT, (tAVCT_LCB_EVT *) &result);
}
}
/*******************************************************************************
**
** Function avct_lcb_unbind_disc
**
** Description Deallocate ccb and call callback with disconnect event.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_unbind_disc(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
UNUSED(p_lcb);
avct_ccb_dealloc(p_data->p_ccb, AVCT_DISCONNECT_CFM_EVT, 0, NULL);
}
/*******************************************************************************
**
** Function avct_lcb_open_ind
**
** Description Handle an LL_OPEN event. For each allocated ccb already
** bound to this lcb, send a connect event. For each
** unbound ccb with a new PID, bind that ccb to this lcb and
** send a connect event.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_open_ind(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
tAVCT_CCB *p_ccb = &avct_cb.ccb[0];
int i;
BOOLEAN bind = FALSE;
for (i = 0; i < AVCT_NUM_CONN; i++, p_ccb++) {
/* if ccb allocated and */
if (p_ccb->allocated) {
/* if bound to this lcb send connect confirm event */
if (p_ccb->p_lcb == p_lcb) {
bind = TRUE;
L2CA_SetTxPriority(p_lcb->ch_lcid, L2CAP_CHNL_PRIORITY_HIGH);
p_ccb->cc.p_ctrl_cback(avct_ccb_to_idx(p_ccb), AVCT_CONNECT_CFM_EVT,
0, p_lcb->peer_addr);
}
/* if unbound acceptor and lcb doesn't already have a ccb for this PID */
else if ((p_ccb->p_lcb == NULL) && (p_ccb->cc.role == AVCT_ACP) &&
(avct_lcb_has_pid(p_lcb, p_ccb->cc.pid) == NULL)) {
/* bind ccb to lcb and send connect ind event */
bind = TRUE;
p_ccb->p_lcb = p_lcb;
L2CA_SetTxPriority(p_lcb->ch_lcid, L2CAP_CHNL_PRIORITY_HIGH);
p_ccb->cc.p_ctrl_cback(avct_ccb_to_idx(p_ccb), AVCT_CONNECT_IND_EVT,
0, p_lcb->peer_addr);
}
}
}
/* if no ccbs bound to this lcb, disconnect */
if (bind == FALSE) {
avct_lcb_event(p_lcb, AVCT_LCB_INT_CLOSE_EVT, p_data);
}
}
/*******************************************************************************
**
** Function avct_lcb_open_fail
**
** Description L2CAP channel open attempt failed. Deallocate any ccbs
** on this lcb and send connect confirm event with failure.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_open_fail(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
tAVCT_CCB *p_ccb = &avct_cb.ccb[0];
int i;
for (i = 0; i < AVCT_NUM_CONN; i++, p_ccb++) {
if (p_ccb->allocated && (p_ccb->p_lcb == p_lcb)) {
avct_ccb_dealloc(p_ccb, AVCT_CONNECT_CFM_EVT,
p_data->result, p_lcb->peer_addr);
}
}
}
/*******************************************************************************
**
** Function avct_lcb_close_ind
**
** Description L2CAP channel closed by peer. Deallocate any initiator
** ccbs on this lcb and send disconnect ind event.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_close_ind(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
tAVCT_CCB *p_ccb = &avct_cb.ccb[0];
int i;
UNUSED(p_data);
for (i = 0; i < AVCT_NUM_CONN; i++, p_ccb++) {
if (p_ccb->allocated && (p_ccb->p_lcb == p_lcb)) {
if (p_ccb->cc.role == AVCT_INT) {
avct_ccb_dealloc(p_ccb, AVCT_DISCONNECT_IND_EVT,
0, p_lcb->peer_addr);
} else {
p_ccb->p_lcb = NULL;
(*p_ccb->cc.p_ctrl_cback)(avct_ccb_to_idx(p_ccb), AVCT_DISCONNECT_IND_EVT,
0, p_lcb->peer_addr);
}
}
}
}
/*******************************************************************************
**
** Function avct_lcb_close_cfm
**
** Description L2CAP channel closed by us. Deallocate any initiator
** ccbs on this lcb and send disconnect ind or cfm event.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_close_cfm(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
tAVCT_CCB *p_ccb = &avct_cb.ccb[0];
int i;
UINT8 event;
for (i = 0; i < AVCT_NUM_CONN; i++, p_ccb++) {
if (p_ccb->allocated && (p_ccb->p_lcb == p_lcb)) {
/* if this ccb initiated close send disconnect cfm otherwise ind */
if (p_ccb->ch_close) {
p_ccb->ch_close = FALSE;
event = AVCT_DISCONNECT_CFM_EVT;
} else {
event = AVCT_DISCONNECT_IND_EVT;
}
if (p_ccb->cc.role == AVCT_INT) {
avct_ccb_dealloc(p_ccb, event, p_data->result, p_lcb->peer_addr);
} else {
p_ccb->p_lcb = NULL;
(*p_ccb->cc.p_ctrl_cback)(avct_ccb_to_idx(p_ccb), event,
p_data->result, p_lcb->peer_addr);
}
}
}
}
/*******************************************************************************
**
** Function avct_lcb_bind_conn
**
** Description Bind ccb to lcb and send connect cfm event.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_bind_conn(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
p_data->p_ccb->p_lcb = p_lcb;
(*p_data->p_ccb->cc.p_ctrl_cback)(avct_ccb_to_idx(p_data->p_ccb),
AVCT_CONNECT_CFM_EVT, 0, p_lcb->peer_addr);
}
/*******************************************************************************
**
** Function avct_lcb_chk_disc
**
** Description A ccb wants to close; if it is the last ccb on this lcb,
** close channel. Otherwise just deallocate and call
** callback.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_chk_disc(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
AVCT_TRACE_EVENT("avct_lcb_chk_disc");
#if (AVCT_BROWSE_INCLUDED == TRUE)
avct_close_bcb(p_lcb, p_data);
#endif
if (avct_lcb_last_ccb(p_lcb, p_data->p_ccb)) {
AVCT_TRACE_EVENT("closing");
p_data->p_ccb->ch_close = TRUE;
avct_lcb_event(p_lcb, AVCT_LCB_INT_CLOSE_EVT, p_data);
} else {
AVCT_TRACE_EVENT("dealloc ccb");
avct_lcb_unbind_disc(p_lcb, p_data);
}
}
/*******************************************************************************
**
** Function avct_lcb_chnl_disc
**
** Description Disconnect L2CAP channel.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_chnl_disc(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
UNUSED(p_data);
L2CA_DisconnectReq(p_lcb->ch_lcid);
}
/*******************************************************************************
**
** Function avct_lcb_bind_fail
**
** Description Deallocate ccb and call callback with connect event
** with failure result.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_bind_fail(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
UNUSED(p_lcb);
avct_ccb_dealloc(p_data->p_ccb, AVCT_CONNECT_CFM_EVT, AVCT_RESULT_FAIL, NULL);
}
/*******************************************************************************
**
** Function avct_lcb_cong_ind
**
** Description Handle congestion indication from L2CAP.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_cong_ind(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
tAVCT_CCB *p_ccb = &avct_cb.ccb[0];
int i;
UINT8 event;
BT_HDR *p_buf;
/* set event */
event = (p_data->cong) ? AVCT_CONG_IND_EVT : AVCT_UNCONG_IND_EVT;
p_lcb->cong = p_data->cong;
if (p_lcb->cong == FALSE && !fixed_queue_is_empty(p_lcb->tx_q))
{
while (!p_lcb->cong &&
(p_buf = (BT_HDR *)fixed_queue_dequeue(p_lcb->tx_q, 0)) != NULL)
{
if (L2CA_DataWrite(p_lcb->ch_lcid, p_buf) == L2CAP_DW_CONGESTED)
{
p_lcb->cong = TRUE;
}
}
}
/* send event to all ccbs on this lcb */
for (i = 0; i < AVCT_NUM_CONN; i++, p_ccb++) {
if (p_ccb->allocated && (p_ccb->p_lcb == p_lcb)) {
(*p_ccb->cc.p_ctrl_cback)(avct_ccb_to_idx(p_ccb), event, 0, p_lcb->peer_addr);
}
}
}
/*******************************************************************************
**
** Function avct_lcb_discard_msg
**
** Description Discard a message sent in from the API.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_discard_msg(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
UNUSED(p_lcb);
AVCT_TRACE_WARNING("Dropping msg");
osi_free(p_data->ul_msg.p_buf);
p_data->ul_msg.p_buf = NULL;
}
/*******************************************************************************
**
** Function avct_lcb_send_msg
**
** Description Build and send an AVCTP message.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_send_msg(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
UINT16 curr_msg_len;
UINT8 pkt_type;
UINT8 hdr_len;
UINT8 *p;
UINT8 nosp = 0; /* number of subsequent packets */
UINT16 temp;
UINT16 buf_size = p_lcb->peer_mtu + L2CAP_MIN_OFFSET + BT_HDR_SIZE;
/* store msg len */
curr_msg_len = p_data->ul_msg.p_buf->len;
/* initialize packet type and other stuff */
if (curr_msg_len <= (p_lcb->peer_mtu - AVCT_HDR_LEN_SINGLE)) {
pkt_type = AVCT_PKT_TYPE_SINGLE;
} else {
pkt_type = AVCT_PKT_TYPE_START;
temp = (curr_msg_len + AVCT_HDR_LEN_START - p_lcb->peer_mtu);
nosp = temp / (p_lcb->peer_mtu - 1) + 1;
if ( (temp % (p_lcb->peer_mtu - 1)) != 0) {
nosp++;
}
}
/* while we haven't sent all packets */
while (curr_msg_len != 0) {
BT_HDR *p_buf;
/* set header len */
hdr_len = avct_lcb_pkt_type_len[pkt_type];
/* if remaining msg must be fragmented */
if (p_data->ul_msg.p_buf->len > (p_lcb->peer_mtu - hdr_len)) {
/* get a new buffer for fragment we are sending */
if ((p_buf = (BT_HDR *) osi_malloc(buf_size)) == NULL) {
/* whoops; free original msg buf and bail */
AVCT_TRACE_ERROR ("avct_lcb_send_msg cannot alloc buffer!!");
osi_free(p_data->ul_msg.p_buf);
break;
}
/* copy portion of data from current message to new buffer */
p_buf->offset = L2CAP_MIN_OFFSET + hdr_len;
p_buf->len = p_lcb->peer_mtu - hdr_len;
memcpy((UINT8 *)(p_buf + 1) + p_buf->offset,
(UINT8 *)(p_data->ul_msg.p_buf + 1) + p_data->ul_msg.p_buf->offset, p_buf->len);
p_data->ul_msg.p_buf->offset += p_buf->len;
p_data->ul_msg.p_buf->len -= p_buf->len;
} else {
p_buf = p_data->ul_msg.p_buf;
}
curr_msg_len -= p_buf->len;
/* set up to build header */
p_buf->len += hdr_len;
p_buf->offset -= hdr_len;
p = (UINT8 *)(p_buf + 1) + p_buf->offset;
/* build header */
AVCT_BLD_HDR(p, p_data->ul_msg.label, pkt_type, p_data->ul_msg.cr);
if (pkt_type == AVCT_PKT_TYPE_START) {
UINT8_TO_STREAM(p, nosp);
}
if ((pkt_type == AVCT_PKT_TYPE_START) || (pkt_type == AVCT_PKT_TYPE_SINGLE)) {
UINT16_TO_BE_STREAM(p, p_data->ul_msg.p_ccb->cc.pid);
}
if (p_lcb->cong == TRUE) {
fixed_queue_enqueue(p_lcb->tx_q, p_buf, FIXED_QUEUE_MAX_TIMEOUT);
}
/* send message to L2CAP */
else {
if (L2CA_DataWrite(p_lcb->ch_lcid, p_buf) == L2CAP_DW_CONGESTED) {
p_lcb->cong = TRUE;
}
}
/* update pkt type for next packet */
if (curr_msg_len > (p_lcb->peer_mtu - AVCT_HDR_LEN_END)) {
pkt_type = AVCT_PKT_TYPE_CONT;
} else {
pkt_type = AVCT_PKT_TYPE_END;
}
}
AVCT_TRACE_DEBUG ("avct_lcb_send_msg tx_q_count:%d",
fixed_queue_length(p_lcb->tx_q));
return;
}
/*******************************************************************************
**
** Function avct_lcb_free_msg_ind
**
** Description Discard an incoming AVCTP message.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_free_msg_ind(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
UNUSED(p_lcb);
if (p_data == NULL) {
return;
}
osi_free(p_data->p_buf);
p_data->p_buf = NULL;
}
/*******************************************************************************
**
** Function avct_lcb_msg_ind
**
** Description Handle an incoming AVCTP message.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avct_lcb_msg_ind(tAVCT_LCB *p_lcb, tAVCT_LCB_EVT *p_data)
{
UINT8 *p;
UINT8 label, type, cr_ipid;
UINT16 pid;
tAVCT_CCB *p_ccb;
BT_HDR *p_buf;
/* this p_buf is to be reported through p_msg_cback. The layer_specific
* needs to be set properly to indicate that it is received through
* control channel */
p_data->p_buf->layer_specific = AVCT_DATA_CTRL;
/* reassemble message; if no message available (we received a fragment) return */
if ((p_data->p_buf = avct_lcb_msg_asmbl(p_lcb, p_data->p_buf)) == NULL) {
return;
}
p = (UINT8 *)(p_data->p_buf + 1) + p_data->p_buf->offset;
/* parse header byte */
AVCT_PRS_HDR(p, label, type, cr_ipid);
UNUSED(type);
/* check for invalid cr_ipid */
if (cr_ipid == AVCT_CR_IPID_INVALID) {
AVCT_TRACE_WARNING("Invalid cr_ipid %d", cr_ipid);
osi_free(p_data->p_buf);
p_data->p_buf = NULL;
return;
}
/* parse and lookup PID */
BE_STREAM_TO_UINT16(pid, p);
if ((p_ccb = avct_lcb_has_pid(p_lcb, pid)) != NULL) {
/* PID found; send msg up, adjust bt hdr and call msg callback */
p_data->p_buf->offset += AVCT_HDR_LEN_SINGLE;
p_data->p_buf->len -= AVCT_HDR_LEN_SINGLE;
(*p_ccb->cc.p_msg_cback)(avct_ccb_to_idx(p_ccb), label, cr_ipid, p_data->p_buf);
} else {
/* PID not found; drop message */
AVCT_TRACE_WARNING("No ccb for PID=%x", pid);
osi_free(p_data->p_buf);
p_data->p_buf = NULL;
/* if command send reject */
if (cr_ipid == AVCT_CMD) {
if ((p_buf = (BT_HDR *) osi_malloc(AVCT_CMD_BUF_SIZE)) != NULL) {
p_buf->len = AVCT_HDR_LEN_SINGLE;
p_buf->offset = AVCT_MSG_OFFSET - AVCT_HDR_LEN_SINGLE;
p = (UINT8 *)(p_buf + 1) + p_buf->offset;
AVCT_BLD_HDR(p, label, AVCT_PKT_TYPE_SINGLE, AVCT_REJ);
UINT16_TO_BE_STREAM(p, pid);
L2CA_DataWrite(p_lcb->ch_lcid, p_buf);
}
}
}
}
#endif /* #if (defined(AVCT_INCLUDED) && AVCT_INCLUDED == TRUE) */
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.