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