1 /******************************************************************************
3 * Copyright (C) 2008-2012 Broadcom Corporation
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:
9 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 ******************************************************************************/
19 /******************************************************************************
21 * this file contains the main GATT server attributes access request
24 ******************************************************************************/
26 #include "bt_target.h"
29 #include "btcore/include/uuid.h"
32 #include "osi/include/osi.h"
34 using base::StringPrintf;
36 #define GATTP_MAX_NUM_INC_SVR 0
37 #define GATTP_MAX_CHAR_NUM 2
38 #define GATTP_MAX_ATTR_NUM (GATTP_MAX_CHAR_NUM * 2 + GATTP_MAX_NUM_INC_SVR + 1)
39 #define GATTP_MAX_CHAR_VALUE_SIZE 50
41 #ifndef GATTP_ATTR_DB_SIZE
42 #define GATTP_ATTR_DB_SIZE \
43 GATT_DB_MEM_SIZE(GATTP_MAX_NUM_INC_SVR, GATTP_MAX_CHAR_NUM, \
44 GATTP_MAX_CHAR_VALUE_SIZE)
47 static void gatt_request_cback(uint16_t conn_id, uint32_t trans_id,
48 uint8_t op_code, tGATTS_DATA* p_data);
49 static void gatt_connect_cback(UNUSED_ATTR tGATT_IF gatt_if,
50 const RawAddress& bda, uint16_t conn_id,
51 bool connected, tGATT_DISCONN_REASON reason,
52 tBT_TRANSPORT transport);
53 static void gatt_disc_res_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
54 tGATT_DISC_RES* p_data);
55 static void gatt_disc_cmpl_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
57 static void gatt_cl_op_cmpl_cback(UNUSED_ATTR uint16_t conn_id,
58 UNUSED_ATTR tGATTC_OPTYPE op,
59 UNUSED_ATTR tGATT_STATUS status,
60 UNUSED_ATTR tGATT_CL_COMPLETE* p_data);
62 static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB* p_clcb);
64 static tGATT_CBACK gatt_profile_cback = {gatt_connect_cback,
65 gatt_cl_op_cmpl_cback,
74 /*******************************************************************************
76 * Function gatt_profile_find_conn_id_by_bd_addr
78 * Description Find the connection ID by remote address
80 * Returns Connection ID
82 ******************************************************************************/
83 uint16_t gatt_profile_find_conn_id_by_bd_addr(const RawAddress& remote_bda) {
84 uint16_t conn_id = GATT_INVALID_CONN_ID;
85 GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &conn_id,
90 /*******************************************************************************
92 * Function gatt_profile_find_clcb_by_conn_id
94 * Description find clcb by Connection ID
96 * Returns Pointer to the found link conenction control block.
98 ******************************************************************************/
99 static tGATT_PROFILE_CLCB* gatt_profile_find_clcb_by_conn_id(uint16_t conn_id) {
101 tGATT_PROFILE_CLCB* p_clcb = NULL;
103 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS;
104 i_clcb++, p_clcb++) {
105 if (p_clcb->in_use && p_clcb->conn_id == conn_id) return p_clcb;
111 /*******************************************************************************
113 * Function gatt_profile_find_clcb_by_bd_addr
115 * Description The function searches all LCBs with macthing bd address.
117 * Returns Pointer to the found link conenction control block.
119 ******************************************************************************/
120 static tGATT_PROFILE_CLCB* gatt_profile_find_clcb_by_bd_addr(
121 const RawAddress& bda, tBT_TRANSPORT transport) {
123 tGATT_PROFILE_CLCB* p_clcb = NULL;
125 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS;
126 i_clcb++, p_clcb++) {
127 if (p_clcb->in_use && p_clcb->transport == transport && p_clcb->connected &&
135 /*******************************************************************************
137 * Function gatt_profile_clcb_alloc
139 * Description The function allocates a GATT profile connection link
142 * Returns NULL if not found. Otherwise pointer to the connection link
145 ******************************************************************************/
146 tGATT_PROFILE_CLCB* gatt_profile_clcb_alloc(uint16_t conn_id,
147 const RawAddress& bda,
148 tBT_TRANSPORT tranport) {
150 tGATT_PROFILE_CLCB* p_clcb = NULL;
152 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS;
153 i_clcb++, p_clcb++) {
154 if (!p_clcb->in_use) {
155 p_clcb->in_use = true;
156 p_clcb->conn_id = conn_id;
157 p_clcb->connected = true;
158 p_clcb->transport = tranport;
163 if (i_clcb < GATT_MAX_APPS) return p_clcb;
168 /*******************************************************************************
170 * Function gatt_profile_clcb_dealloc
172 * Description The function deallocates a GATT profile connection link
177 ******************************************************************************/
178 void gatt_profile_clcb_dealloc(tGATT_PROFILE_CLCB* p_clcb) {
179 memset(p_clcb, 0, sizeof(tGATT_PROFILE_CLCB));
182 /*******************************************************************************
184 * Function gatt_request_cback
186 * Description GATT profile attribute access request callback.
190 ******************************************************************************/
191 static void gatt_request_cback(uint16_t conn_id, uint32_t trans_id,
192 tGATTS_REQ_TYPE type, tGATTS_DATA* p_data) {
193 uint8_t status = GATT_INVALID_PDU;
197 memset(&rsp_msg, 0, sizeof(tGATTS_RSP));
200 case GATTS_REQ_TYPE_READ_CHARACTERISTIC:
201 case GATTS_REQ_TYPE_READ_DESCRIPTOR:
202 status = GATT_READ_NOT_PERMIT;
205 case GATTS_REQ_TYPE_WRITE_CHARACTERISTIC:
206 case GATTS_REQ_TYPE_WRITE_DESCRIPTOR:
207 status = GATT_WRITE_NOT_PERMIT;
210 case GATTS_REQ_TYPE_WRITE_EXEC:
213 VLOG(1) << StringPrintf("Ignore GATT_REQ_EXEC_WRITE/WRITE_CMD");
216 case GATTS_REQ_TYPE_MTU:
217 VLOG(1) << StringPrintf("Get MTU exchange new mtu size: %d", p_data->mtu);
222 VLOG(1) << StringPrintf("Unknown/unexpected LE GAP ATT request: 0x%02x",
227 if (!ignore) GATTS_SendRsp(conn_id, trans_id, status, &rsp_msg);
230 /*******************************************************************************
232 * Function gatt_connect_cback
234 * Description Gatt profile connection callback.
238 ******************************************************************************/
239 static void gatt_connect_cback(UNUSED_ATTR tGATT_IF gatt_if,
240 const RawAddress& bda, uint16_t conn_id,
241 bool connected, tGATT_DISCONN_REASON reason,
242 tBT_TRANSPORT transport) {
243 VLOG(1) << __func__ << ": from " << bda
244 << StringPrintf(" connected:%d conn_id=%d reason = 0x%04x", connected,
247 tGATT_PROFILE_CLCB* p_clcb =
248 gatt_profile_find_clcb_by_bd_addr(bda, transport);
249 if (p_clcb == NULL) return;
252 p_clcb->conn_id = conn_id;
253 p_clcb->connected = true;
255 if (p_clcb->ccc_stage == GATT_SVC_CHANGED_CONNECTING) {
257 gatt_cl_start_config_ccc(p_clcb);
260 gatt_profile_clcb_dealloc(p_clcb);
264 /*******************************************************************************
266 * Function gatt_profile_db_init
268 * Description Initializa the GATT profile attribute database.
270 ******************************************************************************/
271 void gatt_profile_db_init(void) {
272 tBT_UUID app_uuid = {LEN_UUID_128, {0}};
273 uint16_t service_handle = 0;
275 /* Fill our internal UUID with a fixed pattern 0x81 */
276 memset(&app_uuid.uu.uuid128, 0x81, LEN_UUID_128);
278 /* Create a GATT profile service */
279 gatt_cb.gatt_if = GATT_Register(&app_uuid, &gatt_profile_cback);
280 GATT_StartIf(gatt_cb.gatt_if);
282 bt_uuid_t service_uuid;
283 uuid_128_from_16(&service_uuid, UUID_SERVCLASS_GATT_SERVER);
286 uuid_128_from_16(&char_uuid, GATT_UUID_GATT_SRV_CHGD);
288 btgatt_db_element_t service[] = {
289 {.type = BTGATT_DB_PRIMARY_SERVICE, .uuid = service_uuid},
290 {.type = BTGATT_DB_CHARACTERISTIC,
292 .properties = GATT_CHAR_PROP_BIT_INDICATE,
295 GATTS_AddService(gatt_cb.gatt_if, service,
296 sizeof(service) / sizeof(btgatt_db_element_t));
298 service_handle = service[0].attribute_handle;
299 gatt_cb.handle_of_h_r = service[1].attribute_handle;
301 LOG(ERROR) << StringPrintf("gatt_profile_db_init: gatt_if=%d",
305 /*******************************************************************************
307 * Function gatt_disc_res_cback
309 * Description Gatt profile discovery result callback
313 ******************************************************************************/
314 static void gatt_disc_res_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
315 tGATT_DISC_RES* p_data) {
316 tGATT_PROFILE_CLCB* p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
318 if (p_clcb == NULL) return;
321 case GATT_DISC_SRVC_BY_UUID: /* stage 1 */
322 p_clcb->e_handle = p_data->value.group_value.e_handle;
323 p_clcb->ccc_result++;
326 case GATT_DISC_CHAR: /* stage 2 */
327 p_clcb->s_handle = p_data->value.dclr_value.val_handle;
328 p_clcb->ccc_result++;
331 case GATT_DISC_CHAR_DSCPT: /* stage 3 */
332 if (p_data->type.uu.uuid16 == GATT_UUID_CHAR_CLIENT_CONFIG) {
333 p_clcb->s_handle = p_data->handle;
334 p_clcb->ccc_result++;
340 /*******************************************************************************
342 * Function gatt_disc_cmpl_cback
344 * Description Gatt profile discovery complete callback
348 ******************************************************************************/
349 static void gatt_disc_cmpl_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
350 tGATT_STATUS status) {
351 tGATT_PROFILE_CLCB* p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
353 if (p_clcb == NULL) return;
355 if (status == GATT_SUCCESS && p_clcb->ccc_result > 0) {
356 p_clcb->ccc_result = 0;
358 gatt_cl_start_config_ccc(p_clcb);
360 LOG(ERROR) << StringPrintf(
361 "%s() - Unable to register for service changed indication", __func__);
365 /*******************************************************************************
367 * Function gatt_cl_op_cmpl_cback
369 * Description Gatt profile client operation complete callback
373 ******************************************************************************/
374 static void gatt_cl_op_cmpl_cback(UNUSED_ATTR uint16_t conn_id,
375 UNUSED_ATTR tGATTC_OPTYPE op,
376 UNUSED_ATTR tGATT_STATUS status,
377 UNUSED_ATTR tGATT_CL_COMPLETE* p_data) {}
379 /*******************************************************************************
381 * Function gatt_cl_start_config_ccc
383 * Description Gatt profile start configure service change CCC
387 ******************************************************************************/
388 static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB* p_clcb) {
389 tGATT_DISC_PARAM srvc_disc_param;
390 tGATT_VALUE ccc_value;
392 VLOG(1) << StringPrintf("%s() - stage: %d", __func__, p_clcb->ccc_stage);
394 memset(&srvc_disc_param, 0, sizeof(tGATT_DISC_PARAM));
395 memset(&ccc_value, 0, sizeof(tGATT_VALUE));
397 switch (p_clcb->ccc_stage) {
398 case GATT_SVC_CHANGED_SERVICE: /* discover GATT service */
399 srvc_disc_param.s_handle = 1;
400 srvc_disc_param.e_handle = 0xffff;
401 srvc_disc_param.service.len = 2;
402 srvc_disc_param.service.uu.uuid16 = UUID_SERVCLASS_GATT_SERVER;
403 GATTC_Discover(p_clcb->conn_id, GATT_DISC_SRVC_BY_UUID, &srvc_disc_param);
406 case GATT_SVC_CHANGED_CHARACTERISTIC: /* discover service change char */
407 srvc_disc_param.s_handle = 1;
408 srvc_disc_param.e_handle = p_clcb->e_handle;
409 srvc_disc_param.service.len = 2;
410 srvc_disc_param.service.uu.uuid16 = GATT_UUID_GATT_SRV_CHGD;
411 GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR, &srvc_disc_param);
414 case GATT_SVC_CHANGED_DESCRIPTOR: /* discover service change ccc */
415 srvc_disc_param.s_handle = p_clcb->s_handle;
416 srvc_disc_param.e_handle = p_clcb->e_handle;
417 GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR_DSCPT, &srvc_disc_param);
420 case GATT_SVC_CHANGED_CONFIGURE_CCCD: /* write ccc */
421 ccc_value.handle = p_clcb->s_handle;
423 ccc_value.value[0] = GATT_CLT_CONFIG_INDICATION;
424 GATTC_Write(p_clcb->conn_id, GATT_WRITE, &ccc_value);
429 /*******************************************************************************
431 * Function GATT_ConfigServiceChangeCCC
433 * Description Configure service change indication on remote device
437 ******************************************************************************/
438 void GATT_ConfigServiceChangeCCC(const RawAddress& remote_bda, bool enable,
439 tBT_TRANSPORT transport) {
440 tGATT_PROFILE_CLCB* p_clcb =
441 gatt_profile_find_clcb_by_bd_addr(remote_bda, transport);
444 p_clcb = gatt_profile_clcb_alloc(0, remote_bda, transport);
446 if (p_clcb == NULL) return;
448 if (GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &p_clcb->conn_id,
450 p_clcb->connected = true;
452 /* hold the link here */
453 GATT_Connect(gatt_cb.gatt_if, remote_bda, true, transport, true);
454 p_clcb->ccc_stage = GATT_SVC_CHANGED_CONNECTING;
456 if (!p_clcb->connected) {
457 /* wait for connection */
462 gatt_cl_start_config_ccc(p_clcb);