1 /******************************************************************************
2 *
3 * Copyright (C) 2008-2012 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 file contains the main GATT server attributes access request
22 * handling functions.
23 *
24 ******************************************************************************/
25
26 #include "common/bt_target.h"
27 //#include "bt_utils.h"
28
29 #include "stack/gatt_api.h"
30 #include "gatt_int.h"
31 #include "stack/sdpdefs.h"
32 #include "bta/bta_gatts_co.h"
33
34 #if (BLE_INCLUDED == TRUE && GATTS_INCLUDED == TRUE)
35
36 #define BLE_GATT_SR_SUPP_FEAT_EATT_BITMASK 0x01
37 #define BLE_GATT_CL_SUPP_FEAT_ROBUST_CACHING_BITMASK 0x01
38 #define BLE_GATT_CL_SUPP_FEAT_EATT_BITMASK 0x02
39 #define BLE_GATT_CL_SUPP_FEAT_MULTI_NOTIF_BITMASK 0x04
40 #define BLE_GATT_CL_SUPP_FEAT_BITMASK 0x07
41
42 #define GATTP_MAX_NUM_INC_SVR 0
43
44 #if GATTS_ROBUST_CACHING_ENABLED
45 #define GATTP_MAX_CHAR_NUM 5
46 #else
47 #define GATTP_MAX_CHAR_NUM 2
48 #endif /* GATTS_ROBUST_CACHING_ENABLED */
49
50 #define GATTP_MAX_ATTR_NUM (GATTP_MAX_CHAR_NUM * 2 + GATTP_MAX_NUM_INC_SVR + 1)
51 #define GATTP_MAX_CHAR_VALUE_SIZE 50
52
53 #ifndef GATTP_ATTR_DB_SIZE
54 #define GATTP_ATTR_DB_SIZE GATT_DB_MEM_SIZE(GATTP_MAX_NUM_INC_SVR, GATTP_MAX_CHAR_NUM, GATTP_MAX_CHAR_VALUE_SIZE)
55 #endif
56
57 static void gatt_request_cback(UINT16 conn_id, UINT32 trans_id, UINT8 op_code, tGATTS_DATA *p_data);
58 static void gatt_connect_cback(tGATT_IF gatt_if, BD_ADDR bda, UINT16 conn_id, BOOLEAN connected,
59 tGATT_DISCONN_REASON reason, tBT_TRANSPORT transport);
60 static void gatt_disc_res_cback(UINT16 conn_id, tGATT_DISC_TYPE disc_type, tGATT_DISC_RES *p_data);
61 static void gatt_disc_cmpl_cback(UINT16 conn_id, tGATT_DISC_TYPE disc_type, tGATT_STATUS status);
62 static void gatt_cl_op_cmpl_cback(UINT16 conn_id, tGATTC_OPTYPE op, tGATT_STATUS status,
63 tGATT_CL_COMPLETE *p_data);
64
65 static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB *p_clcb);
66
67
68 static const tGATT_CBACK gatt_profile_cback = {
69 gatt_connect_cback,
70 gatt_cl_op_cmpl_cback,
71 gatt_disc_res_cback,
72 gatt_disc_cmpl_cback,
73 gatt_request_cback,
74 NULL,
75 NULL
76 } ;
77
78 /*******************************************************************************
79 **
80 ** Function gatt_profile_find_conn_id_by_bd_addr
81 **
82 ** Description Find the connection ID by remote address
83 **
84 ** Returns Connection ID
85 **
86 *******************************************************************************/
87 #if (GATTS_INCLUDED == TRUE)
gatt_profile_find_conn_id_by_bd_addr(BD_ADDR remote_bda)88 UINT16 gatt_profile_find_conn_id_by_bd_addr(BD_ADDR remote_bda)
89 {
90 UINT16 conn_id = GATT_INVALID_CONN_ID;
91 GATT_GetConnIdIfConnected (gatt_cb.gatt_if, remote_bda, &conn_id, BT_TRANSPORT_LE);
92 return conn_id;
93 }
94 #endif ///GATTS_INCLUDED == TRUE
95 /*******************************************************************************
96 **
97 ** Function gatt_profile_find_clcb_by_conn_id
98 **
99 ** Description find clcb by Connection ID
100 **
101 ** Returns Pointer to the found link conenction control block.
102 **
103 *******************************************************************************/
gatt_profile_find_clcb_by_conn_id(UINT16 conn_id)104 static tGATT_PROFILE_CLCB *gatt_profile_find_clcb_by_conn_id(UINT16 conn_id)
105 {
106 UINT8 i_clcb;
107 tGATT_PROFILE_CLCB *p_clcb = NULL;
108
109 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; i_clcb++, p_clcb++) {
110 if (p_clcb->in_use && p_clcb->conn_id == conn_id) {
111 return p_clcb;
112 }
113 }
114
115 return NULL;
116 }
117
118 /*******************************************************************************
119 **
120 ** Function gatt_profile_find_clcb_by_bd_addr
121 **
122 ** Description The function searches all LCBs with macthing bd address.
123 **
124 ** Returns Pointer to the found link conenction control block.
125 **
126 *******************************************************************************/
gatt_profile_find_clcb_by_bd_addr(BD_ADDR bda,tBT_TRANSPORT transport)127 static tGATT_PROFILE_CLCB *gatt_profile_find_clcb_by_bd_addr(BD_ADDR bda, tBT_TRANSPORT transport)
128 {
129 UINT8 i_clcb;
130 tGATT_PROFILE_CLCB *p_clcb = NULL;
131
132 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; i_clcb++, p_clcb++) {
133 if (p_clcb->in_use && p_clcb->transport == transport &&
134 p_clcb->connected && !memcmp(p_clcb->bda, bda, BD_ADDR_LEN)) {
135 return p_clcb;
136 }
137 }
138
139 return NULL;
140 }
141
142 /*******************************************************************************
143 **
144 ** Function gatt_profile_clcb_alloc
145 **
146 ** Description The function allocates a GATT profile connection link control block
147 **
148 ** Returns NULL if not found. Otherwise pointer to the connection link block.
149 **
150 *******************************************************************************/
gatt_profile_clcb_alloc(UINT16 conn_id,BD_ADDR bda,tBT_TRANSPORT tranport)151 tGATT_PROFILE_CLCB *gatt_profile_clcb_alloc (UINT16 conn_id, BD_ADDR bda, tBT_TRANSPORT tranport)
152 {
153 UINT8 i_clcb = 0;
154 tGATT_PROFILE_CLCB *p_clcb = NULL;
155
156 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; i_clcb++, p_clcb++) {
157 if (!p_clcb->in_use) {
158 p_clcb->in_use = TRUE;
159 p_clcb->conn_id = conn_id;
160 p_clcb->connected = TRUE;
161 p_clcb->transport = tranport;
162 memcpy (p_clcb->bda, bda, BD_ADDR_LEN);
163 break;
164 }
165 }
166 if (i_clcb < GATT_MAX_APPS) {
167 return p_clcb;
168 }
169
170 return NULL;
171 }
172
173 /*******************************************************************************
174 **
175 ** Function gatt_profile_clcb_dealloc
176 **
177 ** Description The function deallocates a GATT profile connection link control block
178 **
179 ** Returns void
180 **
181 *******************************************************************************/
gatt_profile_clcb_dealloc(tGATT_PROFILE_CLCB * p_clcb)182 void gatt_profile_clcb_dealloc (tGATT_PROFILE_CLCB *p_clcb)
183 {
184 memset(p_clcb, 0, sizeof(tGATT_PROFILE_CLCB));
185 }
186
187 /*******************************************************************************
188 **
189 ** Function gatt_proc_read
190 **
191 ** Description GATT Attributes Database Read/Read Blob Request process
192 **
193 ** Returns GATT_SUCCESS if successfully sent; otherwise error code.
194 **
195 *******************************************************************************/
gatt_proc_read(UINT16 conn_id,tGATTS_REQ_TYPE type,tGATT_READ_REQ * p_data,tGATTS_RSP * p_rsp)196 tGATT_STATUS gatt_proc_read (UINT16 conn_id, tGATTS_REQ_TYPE type, tGATT_READ_REQ *p_data, tGATTS_RSP *p_rsp)
197 {
198 tGATT_STATUS status = GATT_NO_RESOURCES;
199 UINT16 len = 0;
200 UINT8 *value;
201 UNUSED(type);
202
203 GATT_TRACE_DEBUG("%s handle %x", __func__, p_data->handle);
204
205 if (p_data->is_long) {
206 p_rsp->attr_value.offset = p_data->offset;
207 }
208
209 p_rsp->attr_value.handle = p_data->handle;
210 #if GATTS_ROBUST_CACHING_ENABLED
211
212 UINT8 tcb_idx = GATT_GET_TCB_IDX(conn_id);
213 tGATT_TCB *tcb = gatt_get_tcb_by_idx(tcb_idx);
214
215 /* handle request for reading client supported features */
216 if (p_data->handle == gatt_cb.handle_of_cl_supported_feat) {
217 if (tcb == NULL) {
218 return GATT_INSUF_RESOURCE;
219 }
220 p_rsp->attr_value.len = 1;
221 memcpy(p_rsp->attr_value.value, &tcb->cl_supp_feat, 1);
222 return GATT_SUCCESS;
223 }
224
225 /* handle request for reading database hash */
226 if (p_data->handle == gatt_cb.handle_of_database_hash) {
227 p_rsp->attr_value.len = BT_OCTET16_LEN;
228 memcpy(p_rsp->attr_value.value, gatt_cb.database_hash, BT_OCTET16_LEN);
229 gatt_sr_update_cl_status(tcb, true);
230 return GATT_SUCCESS;
231 }
232
233 /* handle request for reading server supported features */
234 if (p_data->handle == gatt_cb.handle_of_sr_supported_feat) {
235 p_rsp->attr_value.len = 1;
236 memcpy(p_rsp->attr_value.value, &gatt_cb.gatt_sr_supported_feat_mask, 1);
237 return GATT_SUCCESS;
238 }
239 #endif /* GATTS_ROBUST_CACHING_ENABLED */
240 /* handle request for reading service changed des and the others */
241 status = GATTS_GetAttributeValue(p_data->handle, &len, &value);
242 if(status == GATT_SUCCESS && len > 0 && value) {
243 if(len > GATT_MAX_ATTR_LEN) {
244 len = GATT_MAX_ATTR_LEN;
245 }
246 p_rsp->attr_value.len = len;
247 memcpy(p_rsp->attr_value.value, value, len);
248 }
249 return status;
250 }
251 #if GATTS_ROBUST_CACHING_ENABLED
gatt_sr_write_cl_supp_feat(UINT16 conn_id,tGATT_WRITE_REQ * p_data)252 static tGATT_STATUS gatt_sr_write_cl_supp_feat(UINT16 conn_id, tGATT_WRITE_REQ *p_data)
253 {
254 UINT8 val_new;
255 UINT8 val_old;
256 UINT8 val_xor;
257 UINT8 val_and;
258 UINT8 *p = p_data->value;
259 UINT8 tcb_idx = GATT_GET_TCB_IDX(conn_id);
260 tGATT_TCB *p_tcb = gatt_get_tcb_by_idx(tcb_idx);
261
262 GATT_TRACE_DEBUG("%s len %u, feat %x", __func__, p_data->len, *p);
263
264 if (p_tcb == NULL) {
265 GATT_TRACE_ERROR("%s no conn", __func__);
266 return GATT_NOT_FOUND;
267 }
268
269 if (p_data->len != 1) {
270 GATT_TRACE_ERROR("%s len %u", __func__, p_data->len);
271 return GATT_INVALID_PDU;
272 }
273
274 STREAM_TO_UINT8(val_new, p);
275 val_new = (val_new & BLE_GATT_CL_SUPP_FEAT_BITMASK);
276
277 if (val_new == 0) {
278 GATT_TRACE_ERROR("%s bit cannot be all zero", __func__);
279 return GATT_VALUE_NOT_ALLOWED;
280 }
281
282 val_old = p_tcb->cl_supp_feat;
283 val_xor = val_old ^ val_new;
284 val_and = val_xor & val_new;
285 if (val_and != val_xor) {
286 GATT_TRACE_ERROR("%s bit cannot be reset", __func__);
287 return GATT_VALUE_NOT_ALLOWED;
288 }
289
290 p_tcb->cl_supp_feat = val_new;
291 #if (SMP_INCLUDED == TRUE)
292 bta_gatts_co_cl_feat_save(p_tcb->peer_bda, &p_tcb->cl_supp_feat);
293 #endif
294 return GATT_SUCCESS;
295 }
296 #endif /* GATTS_ROBUST_CACHING_ENABLED */
297 /******************************************************************************
298 **
299 ** Function gatt_proc_write_req
300 **
301 ** Description GATT server process a write request.
302 **
303 ** Returns GATT_SUCCESS if successfully sent; otherwise error code.
304 **
305 *******************************************************************************/
gatt_proc_write_req(UINT16 conn_id,tGATTS_REQ_TYPE type,tGATT_WRITE_REQ * p_data)306 tGATT_STATUS gatt_proc_write_req(UINT16 conn_id, tGATTS_REQ_TYPE type, tGATT_WRITE_REQ *p_data)
307 {
308 if(p_data->len > GATT_MAX_ATTR_LEN) {
309 p_data->len = GATT_MAX_ATTR_LEN;
310 }
311 #if GATTS_ROBUST_CACHING_ENABLED
312 if (p_data->handle == gatt_cb.handle_of_h_r) {
313 return GATT_WRITE_NOT_PERMIT;
314 }
315
316 if (p_data->handle == gatt_cb.handle_of_cl_supported_feat) {
317 return gatt_sr_write_cl_supp_feat(conn_id, p_data);
318 }
319
320 if (p_data->handle == gatt_cb.handle_of_database_hash) {
321 return GATT_WRITE_NOT_PERMIT;
322 }
323
324 if (p_data->handle == gatt_cb.handle_of_sr_supported_feat) {
325 return GATT_WRITE_NOT_PERMIT;
326 }
327 #endif /* GATTS_ROBUST_CACHING_ENABLED */
328 return GATTS_SetAttributeValue(p_data->handle,
329 p_data->len,
330 p_data->value);
331
332 }
333
334 /*******************************************************************************
335 **
336 ** Function gatt_request_cback
337 **
338 ** Description GATT profile attribute access request callback.
339 **
340 ** Returns void.
341 **
342 *******************************************************************************/
gatt_request_cback(UINT16 conn_id,UINT32 trans_id,tGATTS_REQ_TYPE type,tGATTS_DATA * p_data)343 static void gatt_request_cback (UINT16 conn_id, UINT32 trans_id, tGATTS_REQ_TYPE type,
344 tGATTS_DATA *p_data)
345 {
346 UINT8 status = GATT_INVALID_PDU;
347 tGATTS_RSP rsp_msg ;
348 BOOLEAN ignore = FALSE;
349 GATT_TRACE_DEBUG("%s",__func__);
350 memset(&rsp_msg, 0, sizeof(tGATTS_RSP));
351
352 switch (type) {
353 case GATTS_REQ_TYPE_READ:
354 status = gatt_proc_read(conn_id, type, &p_data->read_req, &rsp_msg);
355 break;
356
357 case GATTS_REQ_TYPE_WRITE:
358 if (!p_data->write_req.need_rsp) {
359 ignore = TRUE;
360 }
361 status = gatt_proc_write_req(conn_id, type, &p_data->write_req);
362 break;
363
364 case GATTS_REQ_TYPE_WRITE_EXEC:
365 case GATT_CMD_WRITE:
366 ignore = TRUE;
367 GATT_TRACE_EVENT("Ignore GATT_REQ_EXEC_WRITE/WRITE_CMD" );
368 break;
369
370 case GATTS_REQ_TYPE_MTU:
371 GATT_TRACE_EVENT("Get MTU exchange new mtu size: %d", p_data->mtu);
372 ignore = TRUE;
373 break;
374
375 default:
376 GATT_TRACE_EVENT("Unknown/unexpected LE GAP ATT request: 0x%02x", type);
377 break;
378 }
379
380 if (!ignore) {
381 GATTS_SendRsp (conn_id, trans_id, status, &rsp_msg);
382 }
383
384 }
385
386 /*******************************************************************************
387 **
388 ** Function gatt_connect_cback
389 **
390 ** Description Gatt profile connection callback.
391 **
392 ** Returns void
393 **
394 *******************************************************************************/
gatt_connect_cback(tGATT_IF gatt_if,BD_ADDR bda,UINT16 conn_id,BOOLEAN connected,tGATT_DISCONN_REASON reason,tBT_TRANSPORT transport)395 static void gatt_connect_cback (tGATT_IF gatt_if, BD_ADDR bda, UINT16 conn_id,
396 BOOLEAN connected, tGATT_DISCONN_REASON reason,
397 tBT_TRANSPORT transport)
398 {
399 UNUSED(gatt_if);
400
401 GATT_TRACE_DEBUG ("%s: from %08x%04x connected:%d conn_id=%d reason = 0x%04x", __FUNCTION__,
402 (bda[0] << 24) + (bda[1] << 16) + (bda[2] << 8) + bda[3],
403 (bda[4] << 8) + bda[5], connected, conn_id, reason);
404
405 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_bd_addr(bda, transport);
406 if (p_clcb == NULL) {
407 p_clcb = gatt_profile_clcb_alloc (conn_id, bda, transport);
408 }
409
410 if (p_clcb == NULL) {
411 return;
412 }
413
414 if (GATT_GetConnIdIfConnected (gatt_cb.gatt_if, bda, &p_clcb->conn_id, transport)) {
415 p_clcb->connected = TRUE;
416 p_clcb->conn_id = conn_id;
417 }
418
419
420 if (!p_clcb->connected) {
421 /* wait for connection */
422 return;
423 }
424
425 if (connected) {
426 p_clcb->conn_id = conn_id;
427 p_clcb->connected = TRUE;
428
429 } else {
430 gatt_profile_clcb_dealloc(p_clcb);
431 }
432 }
433
434 /*******************************************************************************
435 **
436 ** Function gatt_profile_db_init
437 **
438 ** Description Initializa the GATT profile attribute database.
439 **
440 *******************************************************************************/
gatt_profile_db_init(void)441 void gatt_profile_db_init (void)
442 {
443 tBT_UUID app_uuid = {LEN_UUID_128, {0}};
444 tBT_UUID uuid = {LEN_UUID_16, {UUID_SERVCLASS_GATT_SERVER}};
445 UINT16 service_handle = 0;
446 tGATT_STATUS status;
447
448 /* Fill our internal UUID with a fixed pattern 0x81 */
449 memset (&app_uuid.uu.uuid128, 0x81, LEN_UUID_128);
450
451
452 /* Create a GATT profile service */
453 gatt_cb.gatt_if = GATT_Register(&app_uuid, &gatt_profile_cback);
454 GATT_StartIf(gatt_cb.gatt_if);
455
456 service_handle = GATTS_CreateService (gatt_cb.gatt_if , &uuid, 0, GATTP_MAX_ATTR_NUM, TRUE);
457 GATT_TRACE_DEBUG ("GATTS_CreateService: handle of service handle%x", service_handle);
458
459 /* add Service Changed characteristic
460 */
461 uuid.uu.uuid16 = gatt_cb.gattp_attr.uuid = GATT_UUID_GATT_SRV_CHGD;
462 gatt_cb.gattp_attr.service_change = 0;
463 gatt_cb.gattp_attr.handle =
464 gatt_cb.handle_of_h_r = GATTS_AddCharacteristic(service_handle, &uuid, 0, GATT_CHAR_PROP_BIT_INDICATE,
465 NULL, NULL);
466
467 GATT_TRACE_DEBUG ("gatt_profile_db_init: handle of service changed%d\n",
468 gatt_cb.handle_of_h_r);
469
470 tBT_UUID descr_uuid = {LEN_UUID_16, {GATT_UUID_CHAR_CLIENT_CONFIG}};
471 uint8_t ccc_value[2] ={ 0x00, 0x00};
472
473 tGATT_ATTR_VAL attr_val = {
474 .attr_max_len = sizeof(UINT16),
475 .attr_len = sizeof(UINT16),
476 .attr_val = ccc_value,
477 };
478
479 GATTS_AddCharDescriptor (service_handle, GATT_PERM_READ | GATT_PERM_WRITE , &descr_uuid, &attr_val, NULL);
480 #if GATTS_ROBUST_CACHING_ENABLED
481 /* add Client Supported Features characteristic */
482 uuid.uu.uuid16 = GATT_UUID_CLIENT_SUP_FEAT;
483 gatt_cb.handle_of_cl_supported_feat = GATTS_AddCharacteristic(service_handle, &uuid, GATT_PERM_READ | GATT_PERM_WRITE,
484 GATT_CHAR_PROP_BIT_READ | GATT_CHAR_PROP_BIT_WRITE, NULL, NULL);
485
486 /* add Database Hash characteristic */
487 uuid.uu.uuid16 = GATT_UUID_GATT_DATABASE_HASH;
488 gatt_cb.handle_of_database_hash = GATTS_AddCharacteristic(service_handle, &uuid, GATT_PERM_READ, GATT_CHAR_PROP_BIT_READ, NULL, NULL);
489
490 /* add Server Supported Features characteristic */
491 uuid.uu.uuid16 = GATT_UUID_SERVER_SUP_FEAT;
492 gatt_cb.handle_of_sr_supported_feat = GATTS_AddCharacteristic(service_handle, &uuid, GATT_PERM_READ, GATT_CHAR_PROP_BIT_READ, NULL, NULL);
493 #endif /* GATTS_ROBUST_CACHING_ENABLED */
494 /* start service */
495 status = GATTS_StartService (gatt_cb.gatt_if, service_handle, GATTP_TRANSPORT_SUPPORTED );
496
497 #if (CONFIG_BT_STACK_NO_LOG)
498 (void) status;
499 #endif
500
501 GATT_TRACE_DEBUG ("gatt_profile_db_init: gatt_if=%d start status%d\n",
502 gatt_cb.gatt_if, status);
503 }
504
505 /*******************************************************************************
506 **
507 ** Function gatt_disc_res_cback
508 **
509 ** Description Gatt profile discovery result callback
510 **
511 ** Returns void
512 **
513 *******************************************************************************/
gatt_disc_res_cback(UINT16 conn_id,tGATT_DISC_TYPE disc_type,tGATT_DISC_RES * p_data)514 static void gatt_disc_res_cback (UINT16 conn_id, tGATT_DISC_TYPE disc_type, tGATT_DISC_RES *p_data)
515 {
516 GATT_TRACE_DEBUG("%s, disc_type = %d",__func__, disc_type);
517 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
518
519 if (p_clcb == NULL) {
520 return;
521 }
522
523 switch (disc_type) {
524 case GATT_DISC_SRVC_BY_UUID:/* stage 1 */
525 p_clcb->e_handle = p_data->value.group_value.e_handle;
526 p_clcb->ccc_result ++;
527 break;
528
529 case GATT_DISC_CHAR:/* stage 2 */
530 p_clcb->s_handle = p_data->value.dclr_value.val_handle;
531 p_clcb->ccc_result ++;
532 break;
533
534 case GATT_DISC_CHAR_DSCPT: /* stage 3 */
535 if (p_data->type.uu.uuid16 == GATT_UUID_CHAR_CLIENT_CONFIG) {
536 p_clcb->s_handle = p_data->handle;
537 p_clcb->ccc_result ++;
538 }
539 break;
540 }
541 }
542
543 /*******************************************************************************
544 **
545 ** Function gatt_disc_cmpl_cback
546 **
547 ** Description Gatt profile discovery complete callback
548 **
549 ** Returns void
550 **
551 *******************************************************************************/
gatt_disc_cmpl_cback(UINT16 conn_id,tGATT_DISC_TYPE disc_type,tGATT_STATUS status)552 static void gatt_disc_cmpl_cback (UINT16 conn_id, tGATT_DISC_TYPE disc_type, tGATT_STATUS status)
553 {
554 GATT_TRACE_DEBUG("%s",__func__);
555 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
556
557 if (p_clcb == NULL) {
558 return;
559 }
560
561 if (status == GATT_SUCCESS && p_clcb->ccc_result > 0) {
562 p_clcb->ccc_result = 0;
563 p_clcb->ccc_stage ++;
564 gatt_cl_start_config_ccc(p_clcb);
565 } else {
566 GATT_TRACE_ERROR("%s() - Register for service changed indication failure", __FUNCTION__);
567 }
568 }
569
570 /*******************************************************************************
571 **
572 ** Function gatt_cl_op_cmpl_cback
573 **
574 ** Description Gatt profile client operation complete callback
575 **
576 ** Returns void
577 **
578 *******************************************************************************/
gatt_cl_op_cmpl_cback(UINT16 conn_id,tGATTC_OPTYPE op,tGATT_STATUS status,tGATT_CL_COMPLETE * p_data)579 static void gatt_cl_op_cmpl_cback (UINT16 conn_id, tGATTC_OPTYPE op,
580 tGATT_STATUS status, tGATT_CL_COMPLETE *p_data)
581 {
582 GATT_TRACE_DEBUG("%s",__func__);
583 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
584
585 if (p_clcb == NULL) {
586 return;
587 }
588
589 if (op == GATTC_OPTYPE_WRITE) {
590 GATT_TRACE_DEBUG("%s() - ccc write status : %d", __FUNCTION__, status);
591 }
592
593 }
594
595 /*******************************************************************************
596 **
597 ** Function gatt_cl_start_config_ccc
598 **
599 ** Description Gatt profile start configure service change CCC
600 **
601 ** Returns void
602 **
603 *******************************************************************************/
gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB * p_clcb)604 static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB *p_clcb)
605 {
606 tGATT_DISC_PARAM srvc_disc_param;
607 tGATT_VALUE ccc_value;
608
609 GATT_TRACE_DEBUG("%s() - stage: %d", __FUNCTION__, p_clcb->ccc_stage);
610
611 memset (&srvc_disc_param, 0 , sizeof(tGATT_DISC_PARAM));
612 memset (&ccc_value, 0 , sizeof(tGATT_VALUE));
613
614 switch (p_clcb->ccc_stage) {
615 case GATT_SVC_CHANGED_SERVICE: /* discover GATT service */
616 srvc_disc_param.s_handle = 1;
617 srvc_disc_param.e_handle = 0xffff;
618 srvc_disc_param.service.len = 2;
619 srvc_disc_param.service.uu.uuid16 = UUID_SERVCLASS_GATT_SERVER;
620 #if (GATTC_INCLUDED == TRUE)
621 if (GATTC_Discover (p_clcb->conn_id, GATT_DISC_SRVC_BY_UUID, &srvc_disc_param) != GATT_SUCCESS) {
622 GATT_TRACE_ERROR("%s() - ccc service error", __FUNCTION__);
623 }
624 #endif ///GATTC_INCLUDED == TRUE
625 break;
626
627 case GATT_SVC_CHANGED_CHARACTERISTIC: /* discover service change char */
628 srvc_disc_param.s_handle = 1;
629 srvc_disc_param.e_handle = p_clcb->e_handle;
630 srvc_disc_param.service.len = 2;
631 srvc_disc_param.service.uu.uuid16 = GATT_UUID_GATT_SRV_CHGD;
632 #if (GATTC_INCLUDED == TRUE)
633 if (GATTC_Discover (p_clcb->conn_id, GATT_DISC_CHAR, &srvc_disc_param) != GATT_SUCCESS) {
634 GATT_TRACE_ERROR("%s() - ccc char error", __FUNCTION__);
635 }
636 #endif ///GATTC_INCLUDED == TRUE
637 break;
638
639 case GATT_SVC_CHANGED_DESCRIPTOR: /* discover service change ccc */
640 srvc_disc_param.s_handle = p_clcb->s_handle;
641 srvc_disc_param.e_handle = p_clcb->e_handle;
642 #if (GATTC_INCLUDED == TRUE)
643 if (GATTC_Discover (p_clcb->conn_id, GATT_DISC_CHAR_DSCPT, &srvc_disc_param) != GATT_SUCCESS) {
644 GATT_TRACE_ERROR("%s() - ccc char descriptor error", __FUNCTION__);
645 }
646 #endif ///GATTC_INCLUDED == TRUE
647 break;
648
649 case GATT_SVC_CHANGED_CONFIGURE_CCCD: /* write ccc */
650 ccc_value.handle = p_clcb->s_handle;
651 ccc_value.len = 2;
652 ccc_value.value[0] = GATT_CLT_CONFIG_INDICATION;
653 #if (GATTC_INCLUDED == TRUE)
654 if (GATTC_Write (p_clcb->conn_id, GATT_WRITE, &ccc_value) != GATT_SUCCESS) {
655 GATT_TRACE_ERROR("%s() - write ccc error", __FUNCTION__);
656 }
657 #endif ///GATTC_INCLUDED == TRUE
658 break;
659 }
660 }
661
662 /*******************************************************************************
663 **
664 ** Function GATT_ConfigServiceChangeCCC
665 **
666 ** Description Configure service change indication on remote device
667 **
668 ** Returns none
669 **
670 *******************************************************************************/
GATT_ConfigServiceChangeCCC(BD_ADDR remote_bda,BOOLEAN enable,tBT_TRANSPORT transport)671 void GATT_ConfigServiceChangeCCC (BD_ADDR remote_bda, BOOLEAN enable, tBT_TRANSPORT transport)
672 {
673 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_bd_addr (remote_bda, transport);
674
675 if (p_clcb == NULL) {
676 p_clcb = gatt_profile_clcb_alloc (0, remote_bda, transport);
677 }
678
679 if (p_clcb == NULL) {
680 return;
681 }
682
683 if (GATT_GetConnIdIfConnected (gatt_cb.gatt_if, remote_bda, &p_clcb->conn_id, transport)) {
684 p_clcb->connected = TRUE;
685 }
686 /* hold the link here */
687 GATT_Connect(gatt_cb.gatt_if, remote_bda, BLE_ADDR_UNKNOWN_TYPE, TRUE, transport, FALSE);
688 p_clcb->ccc_stage = GATT_SVC_CHANGED_CONNECTING;
689
690 if (!p_clcb->connected) {
691 /* wait for connection */
692 return;
693 }
694
695 p_clcb->ccc_stage ++;
696 gatt_cl_start_config_ccc(p_clcb);
697 }
698
699 #if GATTS_ROBUST_CACHING_ENABLED
700 /*******************************************************************************
701 **
702 ** Function gatt_sr_is_cl_robust_caching_supported
703 **
704 ** Description Check if Robust Caching is supported for the connection
705 **
706 ** Returns true if enabled by client side, otherwise false
707 **
708 *******************************************************************************/
gatt_sr_is_cl_robust_caching_supported(tGATT_TCB * p_tcb)709 static BOOLEAN gatt_sr_is_cl_robust_caching_supported(tGATT_TCB *p_tcb)
710 {
711 return (p_tcb->cl_supp_feat & BLE_GATT_CL_SUPP_FEAT_ROBUST_CACHING_BITMASK);
712 }
713 /*******************************************************************************
714 **
715 ** Function gatt_sr_is_cl_change_aware
716 **
717 ** Description Check if the connection is change-aware
718 **
719 ** Returns true if change aware, otherwise false
720 **
721 *******************************************************************************/
gatt_sr_is_cl_change_aware(tGATT_TCB * p_tcb)722 BOOLEAN gatt_sr_is_cl_change_aware(tGATT_TCB *p_tcb)
723 {
724 // If robust caching is not supported, should always return true by default
725 if (!gatt_sr_is_cl_robust_caching_supported(p_tcb)) {
726 return true;
727 }
728
729 return p_tcb->is_robust_cache_change_aware;
730 }
731
732 /*******************************************************************************
733 **
734 ** Function gatt_sr_init_cl_status
735 **
736 ** Description Restore status for trusted device
737 **
738 ** Returns none
739 **
740 *******************************************************************************/
gatt_sr_init_cl_status(tGATT_TCB * p_tcb)741 void gatt_sr_init_cl_status(tGATT_TCB *p_tcb)
742 {
743 #if (SMP_INCLUDED == TRUE)
744 bta_gatts_co_cl_feat_load(p_tcb->peer_bda, &p_tcb->cl_supp_feat);
745 #endif
746
747 // This is used to reset bit when robust caching is disabled
748 if (!GATTS_ROBUST_CACHING_ENABLED) {
749 p_tcb->cl_supp_feat &= ~BLE_GATT_CL_SUPP_FEAT_ROBUST_CACHING_BITMASK;
750 }
751
752 if (gatt_sr_is_cl_robust_caching_supported(p_tcb)) {
753 BT_OCTET16 stored_hash = {0};
754 #if (SMP_INCLUDED == TRUE)
755 bta_gatts_co_db_hash_load(p_tcb->peer_bda, stored_hash);
756 #endif
757 p_tcb->is_robust_cache_change_aware = (memcmp(stored_hash, gatt_cb.database_hash, BT_OCTET16_LEN) == 0);
758 } else {
759 p_tcb->is_robust_cache_change_aware = true;
760 }
761
762 GATT_TRACE_DEBUG("%s feat %x aware %d", __func__, p_tcb->cl_supp_feat, p_tcb->is_robust_cache_change_aware);
763 }
764
765 /*******************************************************************************
766 **
767 ** Function gatt_sr_update_cl_status
768 **
769 ** Description Update change-aware status for the remote device
770 **
771 ** Returns none
772 **
773 *******************************************************************************/
gatt_sr_update_cl_status(tGATT_TCB * p_tcb,BOOLEAN chg_aware)774 void gatt_sr_update_cl_status(tGATT_TCB *p_tcb, BOOLEAN chg_aware)
775 {
776 if (p_tcb == NULL) {
777 return;
778 }
779
780 // if robust caching is not supported, do nothing
781 if (!gatt_sr_is_cl_robust_caching_supported(p_tcb)) {
782 return;
783 }
784
785 // only when client status is changed from unaware to aware, we should store database hash
786 if (!p_tcb->is_robust_cache_change_aware && chg_aware) {
787 #if (SMP_INCLUDED == TRUE)
788 bta_gatts_co_db_hash_save(p_tcb->peer_bda, gatt_cb.database_hash);
789 #endif
790 }
791
792 p_tcb->is_robust_cache_change_aware = chg_aware;
793
794 GATT_TRACE_DEBUG("%s status %d", __func__, chg_aware);
795 }
796 #endif /* GATTS_ROBUST_CACHING_ENABLED */
797 #endif /* BLE_INCLUDED == TRUE && GATTS_INCLUDED == TRUE */
798
