bta_gattc_api.cc revision 16bb48b320cde54a1a06a525f4d9be1421689649 
1/******************************************************************************
2 *
3 *  Copyright (C) 2010-2012 Broadcom Corporation
4 *
5 *  Licensed under the Apache License, Version 2.0 (the "License");
6 *  you may not use this file except in compliance with the License.
7 *  You may obtain a copy of the License at:
8 *
9 *  http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 *
17 ******************************************************************************/
18
19/******************************************************************************
20 *
21 *  This is the implementation of the API for GATT module of BTA.
22 *
23 ******************************************************************************/
24
25#include "bt_target.h"
26
27#include <string.h>
28
29#include <base/bind.h>
30#include <base/bind_helpers.h>
31#include <base/callback.h>
32#include "bt_common.h"
33#include "bta_closure_api.h"
34#include "bta_gatt_api.h"
35#include "bta_gattc_int.h"
36#include "bta_sys.h"
37#include "device/include/controller.h"
38
39/*****************************************************************************
40 *  Constants
41 ****************************************************************************/
42
43static const tBTA_SYS_REG bta_gattc_reg = {bta_gattc_hdl_event,
44                                           BTA_GATTC_Disable};
45
46/*******************************************************************************
47 *
48 * Function         BTA_GATTC_Disable
49 *
50 * Description      This function is called to disable GATTC module
51 *
52 * Parameters       None.
53 *
54 * Returns          None
55 *
56 ******************************************************************************/
57void BTA_GATTC_Disable(void) {
58  if (bta_sys_is_register(BTA_ID_GATTC) == false) {
59    APPL_TRACE_WARNING("GATTC Module not enabled/already disabled");
60    return;
61  }
62
63  BT_HDR* p_buf = (BT_HDR*)osi_malloc(sizeof(BT_HDR));
64  p_buf->event = BTA_GATTC_API_DISABLE_EVT;
65
66  bta_sys_sendmsg(p_buf);
67  bta_sys_deregister(BTA_ID_GATTC);
68}
69
70static void create_random_uuid(tBT_UUID* uuid) {
71  uuid->len = LEN_UUID_128;
72
73  for (int i = 0; i < 16; ++i) {
74    uuid->uu.uuid128[i] = (uint8_t)(rand() % 256);
75  }
76}
77
78/**
79 * This function is called to register application callbacks with BTA GATTC
80 * module. |client_cb| pointer to the application callback function.
81 * |cb| one time callback when registration is finished
82 */
83void BTA_GATTC_AppRegister(tBTA_GATTC_CBACK* p_client_cb,
84                           BtaAppRegisterCallback cb) {
85  if (bta_sys_is_register(BTA_ID_GATTC) == false)
86    bta_sys_register(BTA_ID_GATTC, &bta_gattc_reg);
87
88  // base::Owned will own and free app_uuid
89  tBT_UUID* uuid = new tBT_UUID;
90  create_random_uuid(uuid);
91  do_in_bta_thread(FROM_HERE, base::Bind(&bta_gattc_register, base::Owned(uuid),
92                                         p_client_cb, std::move(cb)));
93}
94
95/*******************************************************************************
96 *
97 * Function         BTA_GATTC_AppDeregister
98 *
99 * Description      This function is called to deregister an application
100 *                  from BTA GATTC module.
101 *
102 * Parameters       client_if - client interface identifier.
103 *
104 * Returns          None
105 *
106 ******************************************************************************/
107void BTA_GATTC_AppDeregister(tBTA_GATTC_IF client_if) {
108  tBTA_GATTC_API_DEREG* p_buf =
109      (tBTA_GATTC_API_DEREG*)osi_malloc(sizeof(tBTA_GATTC_API_DEREG));
110
111  p_buf->hdr.event = BTA_GATTC_API_DEREG_EVT;
112  p_buf->client_if = client_if;
113
114  bta_sys_sendmsg(p_buf);
115}
116
117/*******************************************************************************
118 *
119 * Function         BTA_GATTC_Open
120 *
121 * Description      Open a direct connection or add a background auto connection
122 *                  bd address
123 *
124 * Parameters       client_if: server interface.
125 *                  remote_bda: remote device BD address.
126 *                  is_direct: direct connection or background auto connection
127 *                  transport: Transport to be used for GATT connection
128 *                             (BREDR/LE)
129 *                  initiating_phys: LE PHY to use, optional
130 *                  opportunistic: wether the connection shall be opportunistic,
131 *                                 and don't impact the disconnection timer
132 *
133 ******************************************************************************/
134void BTA_GATTC_Open(tBTA_GATTC_IF client_if, BD_ADDR remote_bda, bool is_direct,
135                    tBTA_GATT_TRANSPORT transport, bool opportunistic) {
136  uint8_t phy = controller_get_interface()->get_le_all_initiating_phys();
137  BTA_GATTC_Open(client_if, remote_bda, is_direct, transport, phy,
138                 opportunistic);
139}
140
141void BTA_GATTC_Open(tBTA_GATTC_IF client_if, BD_ADDR remote_bda, bool is_direct,
142                    tBTA_GATT_TRANSPORT transport, uint8_t initiating_phys,
143                    bool opportunistic) {
144  tBTA_GATTC_API_OPEN* p_buf =
145      (tBTA_GATTC_API_OPEN*)osi_malloc(sizeof(tBTA_GATTC_API_OPEN));
146
147  p_buf->hdr.event = BTA_GATTC_API_OPEN_EVT;
148  p_buf->client_if = client_if;
149  p_buf->is_direct = is_direct;
150  p_buf->transport = transport;
151  p_buf->initiating_phys = initiating_phys;
152  p_buf->opportunistic = opportunistic;
153  memcpy(p_buf->remote_bda, remote_bda, BD_ADDR_LEN);
154
155  bta_sys_sendmsg(p_buf);
156}
157
158/*******************************************************************************
159 *
160 * Function         BTA_GATTC_CancelOpen
161 *
162 * Description      Cancel a direct open connection or remove a background auto
163 *                  connection
164 *                  bd address
165 *
166 * Parameters       client_if: server interface.
167 *                  remote_bda: remote device BD address.
168 *                  is_direct: direct connection or background auto connection
169 *
170 * Returns          void
171 *
172 ******************************************************************************/
173void BTA_GATTC_CancelOpen(tBTA_GATTC_IF client_if, BD_ADDR remote_bda,
174                          bool is_direct) {
175  tBTA_GATTC_API_CANCEL_OPEN* p_buf = (tBTA_GATTC_API_CANCEL_OPEN*)osi_malloc(
176      sizeof(tBTA_GATTC_API_CANCEL_OPEN));
177
178  p_buf->hdr.event = BTA_GATTC_API_CANCEL_OPEN_EVT;
179  p_buf->client_if = client_if;
180  p_buf->is_direct = is_direct;
181  memcpy(p_buf->remote_bda, remote_bda, BD_ADDR_LEN);
182
183  bta_sys_sendmsg(p_buf);
184}
185
186/*******************************************************************************
187 *
188 * Function         BTA_GATTC_Close
189 *
190 * Description      Close a connection to a GATT server.
191 *
192 * Parameters       conn_id: connectino ID to be closed.
193 *
194 * Returns          void
195 *
196 ******************************************************************************/
197void BTA_GATTC_Close(uint16_t conn_id) {
198  BT_HDR* p_buf = (BT_HDR*)osi_malloc(sizeof(BT_HDR));
199
200  p_buf->event = BTA_GATTC_API_CLOSE_EVT;
201  p_buf->layer_specific = conn_id;
202
203  bta_sys_sendmsg(p_buf);
204}
205
206/*******************************************************************************
207 *
208 * Function         BTA_GATTC_ConfigureMTU
209 *
210 * Description      Configure the MTU size in the GATT channel. This can be done
211 *                  only once per connection.
212 *
213 * Parameters       conn_id: connection ID.
214 *                  mtu: desired MTU size to use.
215 *
216 * Returns          void
217 *
218 ******************************************************************************/
219void BTA_GATTC_ConfigureMTU(uint16_t conn_id, uint16_t mtu) {
220  tBTA_GATTC_API_CFG_MTU* p_buf =
221      (tBTA_GATTC_API_CFG_MTU*)osi_malloc(sizeof(tBTA_GATTC_API_CFG_MTU));
222
223  p_buf->hdr.event = BTA_GATTC_API_CFG_MTU_EVT;
224  p_buf->hdr.layer_specific = conn_id;
225  p_buf->mtu = mtu;
226
227  bta_sys_sendmsg(p_buf);
228}
229
230/*******************************************************************************
231 *
232 * Function         BTA_GATTC_ServiceSearchRequest
233 *
234 * Description      This function is called to request a GATT service discovery
235 *                  on a GATT server. This function report service search
236 *                  result by a callback event, and followed by a service search
237 *                  complete event.
238 *
239 * Parameters       conn_id: connection ID.
240 *                  p_srvc_uuid: a UUID of the service application is interested
241 *                               in.
242 *                              If Null, discover for all services.
243 *
244 * Returns          None
245 *
246 ******************************************************************************/
247void BTA_GATTC_ServiceSearchRequest(uint16_t conn_id, tBT_UUID* p_srvc_uuid) {
248  const size_t len = sizeof(tBTA_GATTC_API_SEARCH) + sizeof(tBT_UUID);
249  tBTA_GATTC_API_SEARCH* p_buf = (tBTA_GATTC_API_SEARCH*)osi_calloc(len);
250
251  p_buf->hdr.event = BTA_GATTC_API_SEARCH_EVT;
252  p_buf->hdr.layer_specific = conn_id;
253  if (p_srvc_uuid) {
254    p_buf->p_srvc_uuid = (tBT_UUID*)(p_buf + 1);
255    memcpy(p_buf->p_srvc_uuid, p_srvc_uuid, sizeof(tBT_UUID));
256  } else {
257    p_buf->p_srvc_uuid = NULL;
258  }
259
260  bta_sys_sendmsg(p_buf);
261}
262
263void BTA_GATTC_DiscoverServiceByUuid(uint16_t conn_id, tBT_UUID* p_srvc_uuid) {
264  tGATT_DISC_PARAM* param = new tGATT_DISC_PARAM;
265  param->s_handle = 0x0001;
266  param->e_handle = 0xFFFF;
267  param->service = *p_srvc_uuid;
268  do_in_bta_thread(FROM_HERE,
269                   base::Bind(base::IgnoreResult(&GATTC_Discover), conn_id,
270                              GATT_DISC_SRVC_BY_UUID, base::Owned(param)));
271}
272
273/*******************************************************************************
274 *
275 * Function         BTA_GATTC_GetServices
276 *
277 * Description      This function is called to find the services on the given
278 *                  server.
279 *
280 * Parameters       conn_id: connection ID which identify the server.
281 *
282 * Returns          returns list_t of tBTA_GATTC_SERVICE or NULL.
283 *
284 ******************************************************************************/
285const list_t* BTA_GATTC_GetServices(uint16_t conn_id) {
286  return bta_gattc_get_services(conn_id);
287}
288
289/*******************************************************************************
290 *
291 * Function         BTA_GATTC_GetCharacteristic
292 *
293 * Description      This function is called to find the characteristic on the
294 *                  given server.
295 *
296 * Parameters       conn_id - connection ID which identify the server.
297 *                  handle - characteristic handle
298 *
299 * Returns          returns pointer to tBTA_GATTC_CHARACTERISTIC or NULL.
300 *
301 ******************************************************************************/
302const tBTA_GATTC_CHARACTERISTIC* BTA_GATTC_GetCharacteristic(uint16_t conn_id,
303                                                             uint16_t handle) {
304  return bta_gattc_get_characteristic(conn_id, handle);
305}
306
307/*******************************************************************************
308 *
309 * Function         BTA_GATTC_GetDescriptor
310 *
311 * Description      This function is called to find the characteristic on the
312 *                  given server.
313 *
314 * Parameters       conn_id - connection ID which identify the server.
315 *                  handle - descriptor handle
316 *
317 * Returns          returns pointer to tBTA_GATTC_DESCRIPTOR or NULL.
318 *
319 ******************************************************************************/
320const tBTA_GATTC_DESCRIPTOR* BTA_GATTC_GetDescriptor(uint16_t conn_id,
321                                                     uint16_t handle) {
322  return bta_gattc_get_descriptor(conn_id, handle);
323}
324
325/*******************************************************************************
326 *
327 * Function         BTA_GATTC_GetGattDb
328 *
329 * Description      This function is called to get the GATT database.
330 *
331 * Parameters       conn_id: connection ID which identify the server.
332 *                  db: output parameter which will contain the GATT database
333 *                      copy. Caller is responsible for freeing it.
334 *                  count: number of elements in database.
335 *
336 ******************************************************************************/
337void BTA_GATTC_GetGattDb(uint16_t conn_id, uint16_t start_handle,
338                         uint16_t end_handle, btgatt_db_element_t** db,
339                         int* count) {
340  bta_gattc_get_gatt_db(conn_id, start_handle, end_handle, db, count);
341}
342
343/*******************************************************************************
344 *
345 * Function         BTA_GATTC_ReadCharacteristic
346 *
347 * Description      This function is called to read a characteristics value
348 *
349 * Parameters       conn_id - connection ID.
350 *                  handle - characteritic handle to read.
351 *
352 * Returns          None
353 *
354 ******************************************************************************/
355void BTA_GATTC_ReadCharacteristic(uint16_t conn_id, uint16_t handle,
356                                  tBTA_GATT_AUTH_REQ auth_req,
357                                  GATT_READ_OP_CB callback, void* cb_data) {
358  tBTA_GATTC_API_READ* p_buf =
359      (tBTA_GATTC_API_READ*)osi_calloc(sizeof(tBTA_GATTC_API_READ));
360
361  p_buf->hdr.event = BTA_GATTC_API_READ_EVT;
362  p_buf->hdr.layer_specific = conn_id;
363  p_buf->auth_req = auth_req;
364  p_buf->handle = handle;
365  p_buf->read_cb = callback;
366  p_buf->read_cb_data = cb_data;
367
368  bta_sys_sendmsg(p_buf);
369}
370
371/**
372 * This function is called to read a value of characteristic with uuid equal to
373 * |uuid|
374 */
375void BTA_GATTC_ReadUsingCharUuid(uint16_t conn_id, tBT_UUID uuid,
376                                 uint16_t s_handle, uint16_t e_handle,
377                                 tBTA_GATT_AUTH_REQ auth_req,
378                                 GATT_READ_OP_CB callback, void* cb_data) {
379  tBTA_GATTC_API_READ* p_buf =
380      (tBTA_GATTC_API_READ*)osi_calloc(sizeof(tBTA_GATTC_API_READ));
381
382  p_buf->hdr.event = BTA_GATTC_API_READ_EVT;
383  p_buf->hdr.layer_specific = conn_id;
384  p_buf->auth_req = auth_req;
385  p_buf->handle = 0;
386  p_buf->uuid = uuid;
387  p_buf->s_handle = s_handle;
388  p_buf->e_handle = e_handle;
389  p_buf->read_cb = callback;
390  p_buf->read_cb_data = cb_data;
391
392  bta_sys_sendmsg(p_buf);
393}
394
395/*******************************************************************************
396 *
397 * Function         BTA_GATTC_ReadCharDescr
398 *
399 * Description      This function is called to read a descriptor value.
400 *
401 * Parameters       conn_id - connection ID.
402 *                  handle - descriptor handle to read.
403 *
404 * Returns          None
405 *
406 ******************************************************************************/
407void BTA_GATTC_ReadCharDescr(uint16_t conn_id, uint16_t handle,
408                             tBTA_GATT_AUTH_REQ auth_req,
409                             GATT_READ_OP_CB callback, void* cb_data) {
410  tBTA_GATTC_API_READ* p_buf =
411      (tBTA_GATTC_API_READ*)osi_calloc(sizeof(tBTA_GATTC_API_READ));
412
413  p_buf->hdr.event = BTA_GATTC_API_READ_EVT;
414  p_buf->hdr.layer_specific = conn_id;
415  p_buf->auth_req = auth_req;
416  p_buf->handle = handle;
417  p_buf->read_cb = callback;
418  p_buf->read_cb_data = cb_data;
419
420  bta_sys_sendmsg(p_buf);
421}
422
423/*******************************************************************************
424 *
425 * Function         BTA_GATTC_ReadMultiple
426 *
427 * Description      This function is called to read multiple characteristic or
428 *                  characteristic descriptors.
429 *
430 * Parameters       conn_id - connectino ID.
431 *                    p_read_multi - pointer to the read multiple parameter.
432 *
433 * Returns          None
434 *
435 ******************************************************************************/
436void BTA_GATTC_ReadMultiple(uint16_t conn_id, tBTA_GATTC_MULTI* p_read_multi,
437                            tBTA_GATT_AUTH_REQ auth_req) {
438  tBTA_GATTC_API_READ_MULTI* p_buf =
439      (tBTA_GATTC_API_READ_MULTI*)osi_calloc(sizeof(tBTA_GATTC_API_READ_MULTI));
440
441  p_buf->hdr.event = BTA_GATTC_API_READ_MULTI_EVT;
442  p_buf->hdr.layer_specific = conn_id;
443  p_buf->auth_req = auth_req;
444  p_buf->num_attr = p_read_multi->num_attr;
445
446  if (p_buf->num_attr > 0)
447    memcpy(p_buf->handles, p_read_multi->handles,
448           sizeof(uint16_t) * p_read_multi->num_attr);
449
450  bta_sys_sendmsg(p_buf);
451}
452
453/*******************************************************************************
454 *
455 * Function         BTA_GATTC_WriteCharValue
456 *
457 * Description      This function is called to write characteristic value.
458 *
459 * Parameters       conn_id - connection ID.
460 *                  handle - characteristic handle to write.
461 *                  write_type - type of write.
462 *                  value - the value to be written.
463 *
464 * Returns          None
465 *
466 ******************************************************************************/
467void BTA_GATTC_WriteCharValue(uint16_t conn_id, uint16_t handle,
468                              tBTA_GATTC_WRITE_TYPE write_type,
469                              std::vector<uint8_t> value,
470                              tBTA_GATT_AUTH_REQ auth_req,
471                              GATT_WRITE_OP_CB callback, void* cb_data) {
472  tBTA_GATTC_API_WRITE* p_buf = (tBTA_GATTC_API_WRITE*)osi_calloc(
473      sizeof(tBTA_GATTC_API_WRITE) + value.size());
474
475  p_buf->hdr.event = BTA_GATTC_API_WRITE_EVT;
476  p_buf->hdr.layer_specific = conn_id;
477  p_buf->auth_req = auth_req;
478  p_buf->handle = handle;
479  p_buf->write_type = write_type;
480  p_buf->len = value.size();
481  p_buf->write_cb = callback;
482  p_buf->write_cb_data = cb_data;
483
484  if (value.size() > 0) {
485    p_buf->p_value = (uint8_t*)(p_buf + 1);
486    memcpy(p_buf->p_value, value.data(), value.size());
487  }
488
489  bta_sys_sendmsg(p_buf);
490}
491
492/*******************************************************************************
493 *
494 * Function         BTA_GATTC_WriteCharDescr
495 *
496 * Description      This function is called to write descriptor value.
497 *
498 * Parameters       conn_id - connection ID
499 *                  handle - descriptor hadle to write.
500 *                  value - the value to be written.
501 *
502 * Returns          None
503 *
504 ******************************************************************************/
505void BTA_GATTC_WriteCharDescr(uint16_t conn_id, uint16_t handle,
506                              std::vector<uint8_t> value,
507                              tBTA_GATT_AUTH_REQ auth_req,
508                              GATT_WRITE_OP_CB callback, void* cb_data) {
509  tBTA_GATTC_API_WRITE* p_buf = (tBTA_GATTC_API_WRITE*)osi_calloc(
510      sizeof(tBTA_GATTC_API_WRITE) + value.size());
511
512  p_buf->hdr.event = BTA_GATTC_API_WRITE_EVT;
513  p_buf->hdr.layer_specific = conn_id;
514  p_buf->auth_req = auth_req;
515  p_buf->handle = handle;
516  p_buf->write_type = BTA_GATTC_TYPE_WRITE;
517  p_buf->write_cb = callback;
518  p_buf->write_cb_data = cb_data;
519
520  if (value.size() != 0) {
521    p_buf->p_value = (uint8_t*)(p_buf + 1);
522    p_buf->len = value.size();
523    memcpy(p_buf->p_value, value.data(), value.size());
524  }
525
526  bta_sys_sendmsg(p_buf);
527}
528
529/*******************************************************************************
530 *
531 * Function         BTA_GATTC_PrepareWrite
532 *
533 * Description      This function is called to prepare write a characteristic
534 *                  value.
535 *
536 * Parameters       conn_id - connection ID.
537 *                  p_char_id - GATT characteritic ID of the service.
538 *                  offset - offset of the write value.
539 *                  value - the value to be written.
540 *
541 * Returns          None
542 *
543 ******************************************************************************/
544void BTA_GATTC_PrepareWrite(uint16_t conn_id, uint16_t handle, uint16_t offset,
545                            std::vector<uint8_t> value,
546                            tBTA_GATT_AUTH_REQ auth_req,
547                            GATT_WRITE_OP_CB callback, void* cb_data) {
548  tBTA_GATTC_API_WRITE* p_buf = (tBTA_GATTC_API_WRITE*)osi_calloc(
549      sizeof(tBTA_GATTC_API_WRITE) + value.size());
550
551  p_buf->hdr.event = BTA_GATTC_API_WRITE_EVT;
552  p_buf->hdr.layer_specific = conn_id;
553  p_buf->auth_req = auth_req;
554  p_buf->handle = handle;
555  p_buf->write_cb = callback;
556  p_buf->write_cb_data = cb_data;
557
558  p_buf->write_type = BTA_GATTC_WRITE_PREPARE;
559  p_buf->offset = offset;
560  p_buf->len = value.size();
561
562  if (value.size() > 0) {
563    p_buf->p_value = (uint8_t*)(p_buf + 1);
564    memcpy(p_buf->p_value, value.data(), value.size());
565  }
566
567  bta_sys_sendmsg(p_buf);
568}
569
570/*******************************************************************************
571 *
572 * Function         BTA_GATTC_ExecuteWrite
573 *
574 * Description      This function is called to execute write a prepare write
575 *                  sequence.
576 *
577 * Parameters       conn_id - connection ID.
578 *                    is_execute - execute or cancel.
579 *
580 * Returns          None
581 *
582 ******************************************************************************/
583void BTA_GATTC_ExecuteWrite(uint16_t conn_id, bool is_execute) {
584  tBTA_GATTC_API_EXEC* p_buf =
585      (tBTA_GATTC_API_EXEC*)osi_calloc(sizeof(tBTA_GATTC_API_EXEC));
586
587  p_buf->hdr.event = BTA_GATTC_API_EXEC_EVT;
588  p_buf->hdr.layer_specific = conn_id;
589  p_buf->is_execute = is_execute;
590
591  bta_sys_sendmsg(p_buf);
592}
593
594/*******************************************************************************
595 *
596 * Function         BTA_GATTC_SendIndConfirm
597 *
598 * Description      This function is called to send handle value confirmation.
599 *
600 * Parameters       conn_id - connection ID.
601 *                    p_char_id - characteristic ID to confirm.
602 *
603 * Returns          None
604 *
605 ******************************************************************************/
606void BTA_GATTC_SendIndConfirm(uint16_t conn_id, uint16_t handle) {
607  tBTA_GATTC_API_CONFIRM* p_buf =
608      (tBTA_GATTC_API_CONFIRM*)osi_calloc(sizeof(tBTA_GATTC_API_CONFIRM));
609
610  APPL_TRACE_API("%s conn_id=%d handle=0x%04x", __func__, conn_id, handle);
611
612  p_buf->hdr.event = BTA_GATTC_API_CONFIRM_EVT;
613  p_buf->hdr.layer_specific = conn_id;
614  p_buf->handle = handle;
615
616  bta_sys_sendmsg(p_buf);
617}
618
619/*******************************************************************************
620 *
621 * Function         BTA_GATTC_RegisterForNotifications
622 *
623 * Description      This function is called to register for notification of a
624 *                  service.
625 *
626 * Parameters       client_if - client interface.
627 *                  bda - target GATT server.
628 *                  handle - GATT characteristic handle.
629 *
630 * Returns          OK if registration succeed, otherwise failed.
631 *
632 ******************************************************************************/
633tBTA_GATT_STATUS BTA_GATTC_RegisterForNotifications(tBTA_GATTC_IF client_if,
634                                                    const BD_ADDR bda,
635                                                    uint16_t handle) {
636  tBTA_GATTC_RCB* p_clreg;
637  tBTA_GATT_STATUS status = BTA_GATT_ILLEGAL_PARAMETER;
638  uint8_t i;
639
640  if (!handle) {
641    APPL_TRACE_ERROR("deregistration failed, handle is 0");
642    return status;
643  }
644
645  p_clreg = bta_gattc_cl_get_regcb(client_if);
646  if (p_clreg != NULL) {
647    for (i = 0; i < BTA_GATTC_NOTIF_REG_MAX; i++) {
648      if (p_clreg->notif_reg[i].in_use &&
649          !memcmp(p_clreg->notif_reg[i].remote_bda, bda, BD_ADDR_LEN) &&
650          p_clreg->notif_reg[i].handle == handle) {
651        APPL_TRACE_WARNING("notification already registered");
652        status = BTA_GATT_OK;
653        break;
654      }
655    }
656    if (status != BTA_GATT_OK) {
657      for (i = 0; i < BTA_GATTC_NOTIF_REG_MAX; i++) {
658        if (!p_clreg->notif_reg[i].in_use) {
659          memset((void*)&p_clreg->notif_reg[i], 0,
660                 sizeof(tBTA_GATTC_NOTIF_REG));
661
662          p_clreg->notif_reg[i].in_use = true;
663          memcpy(p_clreg->notif_reg[i].remote_bda, bda, BD_ADDR_LEN);
664
665          p_clreg->notif_reg[i].handle = handle;
666          status = BTA_GATT_OK;
667          break;
668        }
669      }
670      if (i == BTA_GATTC_NOTIF_REG_MAX) {
671        status = BTA_GATT_NO_RESOURCES;
672        APPL_TRACE_ERROR("Max Notification Reached, registration failed.");
673      }
674    }
675  } else {
676    APPL_TRACE_ERROR("Client_if: %d Not Registered", client_if);
677  }
678
679  return status;
680}
681
682/*******************************************************************************
683 *
684 * Function         BTA_GATTC_DeregisterForNotifications
685 *
686 * Description      This function is called to de-register for notification of a
687 *                  service.
688 *
689 * Parameters       client_if - client interface.
690 *                  remote_bda - target GATT server.
691 *                  handle - GATT characteristic handle.
692 *
693 * Returns          OK if deregistration succeed, otherwise failed.
694 *
695 ******************************************************************************/
696tBTA_GATT_STATUS BTA_GATTC_DeregisterForNotifications(tBTA_GATTC_IF client_if,
697                                                      const BD_ADDR bda,
698                                                      uint16_t handle) {
699  if (!handle) {
700    APPL_TRACE_ERROR("%s: deregistration failed, handle is 0", __func__);
701    return BTA_GATT_ILLEGAL_PARAMETER;
702  }
703
704  tBTA_GATTC_RCB* p_clreg = bta_gattc_cl_get_regcb(client_if);
705  if (p_clreg == NULL) {
706    APPL_TRACE_ERROR(
707        "%s client_if: %d not registered bd_addr:%02x:%02x:%02x:%02x:%02x:%02x",
708        __func__, client_if, bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
709    return BTA_GATT_ILLEGAL_PARAMETER;
710  }
711
712  for (int i = 0; i < BTA_GATTC_NOTIF_REG_MAX; i++) {
713    if (p_clreg->notif_reg[i].in_use &&
714        !memcmp(p_clreg->notif_reg[i].remote_bda, bda, BD_ADDR_LEN) &&
715        p_clreg->notif_reg[i].handle == handle) {
716      APPL_TRACE_DEBUG("%s deregistered bd_addr:%02x:%02x:%02x:%02x:%02x:%02x",
717                       __func__, bda[0], bda[1], bda[2], bda[3], bda[4],
718                       bda[5]);
719      memset(&p_clreg->notif_reg[i], 0, sizeof(tBTA_GATTC_NOTIF_REG));
720      return BTA_GATT_OK;
721    }
722  }
723
724  APPL_TRACE_ERROR(
725      "%s registration not found bd_addr:%02x:%02x:%02x:%02x:%02x:%02x",
726      __func__, bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
727  return BTA_GATT_ERROR;
728}
729
730/*******************************************************************************
731 *
732 * Function         BTA_GATTC_Refresh
733 *
734 * Description      Refresh the server cache of the remote device
735 *
736 * Parameters       remote_bda: remote device BD address.
737 *
738 * Returns          void
739 *
740 ******************************************************************************/
741void BTA_GATTC_Refresh(const BD_ADDR remote_bda) {
742  tBTA_GATTC_API_OPEN* p_buf =
743      (tBTA_GATTC_API_OPEN*)osi_malloc(sizeof(tBTA_GATTC_API_OPEN));
744
745  p_buf->hdr.event = BTA_GATTC_API_REFRESH_EVT;
746  memcpy(p_buf->remote_bda, remote_bda, BD_ADDR_LEN);
747
748  bta_sys_sendmsg(p_buf);
749}
750