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bta_gattc_cache.c
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bta_gattc_cache.c
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/******************************************************************************
*
* Copyright (C) 2003-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains the GATT client discovery procedures and cache
* related functions.
*
******************************************************************************/
#include "common/bt_target.h"
#if defined(GATTC_INCLUDED) && (GATTC_INCLUDED == TRUE)
//#if( defined GATTC_CACHE_NVS ) && (GATTC_CACHE_NVS == TRUE)
#include <string.h>
#include "bta/utl.h"
#include "bta/bta_sys.h"
#include "stack/sdp_api.h"
#include "stack/sdpdefs.h"
#include "bta_gattc_int.h"
#include "stack/btm_api.h"
#include "stack/btm_ble_api.h"
#include "osi/allocator.h"
#include "stack/l2c_api.h"
#include "btm_int.h"
#include "errno.h"
// #include "osi/include/log.h"
static void bta_gattc_char_dscpt_disc_cmpl(UINT16 conn_id, tBTA_GATTC_SERV *p_srvc_cb);
extern void bta_to_btif_uuid(bt_uuid_t *p_dest, tBT_UUID *p_src);
static size_t bta_gattc_get_db_size_with_type(list_t *services,
bt_gatt_db_attribute_type_t type,
tBT_UUID *char_uuid,
UINT16 start_handle, UINT16 end_handle);
static void bta_gattc_cache_write(BD_ADDR server_bda, UINT16 num_attr,
tBTA_GATTC_NV_ATTR *attr);
tBTA_GATTC_SERVICE* bta_gattc_find_matching_service(const list_t *services, UINT16 handle);
tBTA_GATTC_DESCRIPTOR* bta_gattc_get_descriptor_srcb(tBTA_GATTC_SERV *p_srcb, UINT16 handle);
tBTA_GATTC_CHARACTERISTIC* bta_gattc_get_characteristic_srcb(tBTA_GATTC_SERV *p_srcb, UINT16 handle);
void bta_gattc_fill_gatt_db_el(btgatt_db_element_t *p_attr,
bt_gatt_db_attribute_type_t type,
UINT16 att_handle,
UINT16 s_handle, UINT16 e_handle,
UINT16 id, tBT_UUID uuid, UINT8 prop);
#if (SDP_INCLUDED == TRUE)
static tBTA_GATT_STATUS bta_gattc_sdp_service_disc(UINT16 conn_id, tBTA_GATTC_SERV *p_server_cb);
#define BTA_GATT_SDP_DB_SIZE 4096
#endif ///SDP_INCLUDED == TRUE
#define GATT_CACHE_PREFIX "/data/misc/bluetooth/gatt_cache_"
#define GATT_CACHE_VERSION 2
static void bta_gattc_generate_cache_file_name(char *buffer, BD_ADDR bda)
{
sprintf(buffer, "%s%02x%02x%02x%02x%02x%02x", GATT_CACHE_PREFIX,
bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
}
/*****************************************************************************
** Constants and data types
*****************************************************************************/
#if (SDP_INCLUDED == TRUE)
typedef struct
{
tSDP_DISCOVERY_DB *p_sdp_db;
UINT16 sdp_conn_id;
} tBTA_GATTC_CB_DATA;
#endif ///SDP_INCLUDED == TRUE
#if (defined BTA_GATT_DEBUG && BTA_GATT_DEBUG == TRUE)
static char *bta_gattc_attr_type[] = {
"I", /* Included Service */
"C", /* Characteristic */
"D" /* Characteristic Descriptor */
};
/* utility functions */
bool display_cache_attribute(void *data, void *context)
{
//tBTA_GATTC_CACHE_ATTR *p_attr = data;
//APPL_TRACE_ERROR("\t Attr handle[%d] uuid[0x%04x] type[%s] prop[0x%1x]",
// p_attr->handle, p_attr->uuid.uu.uuid16,
// bta_gattc_attr_type[p_attr->attr_type], p_attr->property);
return true;
}
bool display_cache_service(void *data, void *context)
{
tBTA_GATTC_SERVICE *p_cur_srvc = data;
APPL_TRACE_API("Service: handle[%d ~ %d] %s[0x%04x] inst[%d]",
p_cur_srvc->s_handle, p_cur_srvc->e_handle,
((p_cur_srvc->uuid.len == 2) ? "uuid16" : "uuid128"),
p_cur_srvc->uuid.uu.uuid16,
p_cur_srvc->handle);
if (p_cur_srvc->characteristics != NULL) {
list_foreach(p_cur_srvc->characteristics, display_cache_attribute, NULL);
}
return true;
}
/*******************************************************************************
**
** Function bta_gattc_display_cache_server
**
** Description debug function to display the server cache.
**
** Returns none.
**
*******************************************************************************/
static void bta_gattc_display_cache_server(list_t *p_cache)
{
APPL_TRACE_ERROR("<================Start Server Cache =============>");
list_foreach(p_cache, display_cache_service, NULL);
APPL_TRACE_ERROR("<================End Server Cache =============>");
APPL_TRACE_ERROR(" ");
}
/*******************************************************************************
**
** Function bta_gattc_display_explore_record
**
** Description debug function to display the exploration list
**
** Returns none.
**
*******************************************************************************/
static void bta_gattc_display_explore_record(tBTA_GATTC_ATTR_REC *p_rec, UINT8 num_rec)
{
UINT8 i;
tBTA_GATTC_ATTR_REC *pp = p_rec;
APPL_TRACE_ERROR("<================Start Explore Queue =============>");
for (i = 0; i < num_rec; i ++, pp ++) {
APPL_TRACE_ERROR("\t rec[%d] uuid[0x%04x] s_handle[%d] e_handle[%d] is_primary[%d]",
i + 1, pp->uuid.uu.uuid16, pp->s_handle, pp->e_handle, pp->is_primary);
}
APPL_TRACE_ERROR("<================ End Explore Queue =============>");
APPL_TRACE_ERROR(" ");
}
#endif /* BTA_GATT_DEBUG == TRUE */
/*******************************************************************************
**
** Function bta_gattc_init_cache
**
** Description Initialize the database cache and discovery related resources.
**
** Returns status
**
*******************************************************************************/
tBTA_GATT_STATUS bta_gattc_init_cache(tBTA_GATTC_SERV *p_srvc_cb)
{
if (p_srvc_cb->p_srvc_cache != NULL) {
list_free(p_srvc_cb->p_srvc_cache);
p_srvc_cb->p_srvc_cache = NULL;
}
osi_free(p_srvc_cb->p_srvc_list);
if ((p_srvc_cb->p_srvc_list = (tBTA_GATTC_ATTR_REC *)osi_malloc(BTA_GATTC_ATTR_LIST_SIZE)) == NULL) {
APPL_TRACE_DEBUG("No resources: GKI buffer allocation failed.");
return BTA_GATT_NO_RESOURCES;
} else {
p_srvc_cb->total_srvc = 0;
p_srvc_cb->cur_srvc_idx = 0;
p_srvc_cb->cur_char_idx = 0;
p_srvc_cb->next_avail_idx = 0;
p_srvc_cb->total_attr = 0;
}
return BTA_GATT_OK;
}
static void characteristic_free(void *ptr)
{
tBTA_GATTC_CHARACTERISTIC *p_char = ptr;
list_free(p_char->descriptors);
osi_free(p_char);
}
static void service_free(void *ptr)
{
tBTA_GATTC_SERVICE *srvc = ptr;
list_free(srvc->characteristics);
list_free(srvc->included_svc);
osi_free(srvc);
}
static void bta_gattc_free(void *ptr)
{
osi_free(ptr);
}
void bta_gattc_insert_sec_service_to_cache(list_t *services, tBTA_GATTC_SERVICE *p_new_srvc)
{
// services/p_new_srvc is NULL
if (!services || !p_new_srvc) {
APPL_TRACE_ERROR("%s services/p_new_srvc is NULL", __func__);
return;
}
//list is empty
if (list_is_empty(services)) {
list_append(services, p_new_srvc);
} else {
//check the first service
list_node_t *sn = list_begin(services);
tBTA_GATTC_SERVICE *service = list_node(sn);
if(service && p_new_srvc->e_handle < service->s_handle) {
list_prepend(services, p_new_srvc);
} else {
for (list_node_t *sn = list_begin(services); sn != list_end(services); sn = list_next(sn)) {
list_node_t *next_sn = list_next(sn);
if(next_sn == list_end(services)) {
list_append(services, p_new_srvc);
return;
}
tBTA_GATTC_SERVICE *service = list_node(sn);
tBTA_GATTC_SERVICE *next_service = list_node(next_sn);
if (p_new_srvc->s_handle > service->e_handle && p_new_srvc->e_handle < next_service->s_handle) {
list_insert_after(services, sn, p_new_srvc);
return;
}
}
}
}
}
/*******************************************************************************
**
** Function bta_gattc_add_srvc_to_cache
**
** Description Add a service into database cache.
**
** Returns status
**
*******************************************************************************/
static tBTA_GATT_STATUS bta_gattc_add_srvc_to_cache(tBTA_GATTC_SERV *p_srvc_cb,
UINT16 s_handle, UINT16 e_handle,
tBT_UUID *p_uuid,
BOOLEAN is_primary)
{
#if (defined BTA_GATT_DEBUG && BTA_GATT_DEBUG == TRUE)
APPL_TRACE_DEBUG("Add a service into Service");
#endif
tBTA_GATTC_SERVICE *p_new_srvc = osi_malloc(sizeof(tBTA_GATTC_SERVICE));
if (!p_new_srvc) {
APPL_TRACE_WARNING("%s(), no resource.", __func__);
return BTA_GATT_NO_RESOURCES;
}
/* update service information */
p_new_srvc->s_handle = s_handle;
p_new_srvc->e_handle = e_handle;
p_new_srvc->is_primary = is_primary;
memcpy(&p_new_srvc->uuid, p_uuid, sizeof(tBT_UUID));
p_new_srvc->handle = s_handle;
p_new_srvc->characteristics = list_new(characteristic_free);
p_new_srvc->included_svc = list_new(bta_gattc_free);
if (p_srvc_cb->p_srvc_cache == NULL) {
p_srvc_cb->p_srvc_cache = list_new(service_free);
}
if(!p_srvc_cb->p_srvc_cache) {
APPL_TRACE_WARNING("%s(), no resource.", __func__);
osi_free(p_new_srvc);
return BTA_GATT_NO_RESOURCES;
}
if(is_primary) {
list_append(p_srvc_cb->p_srvc_cache, p_new_srvc);
} else {
//add secondary service into list
bta_gattc_insert_sec_service_to_cache(p_srvc_cb->p_srvc_cache, p_new_srvc);
}
return BTA_GATT_OK;
}
static tBTA_GATT_STATUS bta_gattc_add_char_to_cache(tBTA_GATTC_SERV *p_srvc_cb,
UINT16 attr_handle,
UINT16 value_handle,
tBT_UUID *p_uuid,
UINT8 property)
{
#if (defined BTA_GATT_DEBUG && BTA_GATT_DEBUG == TRUE)
APPL_TRACE_DEBUG("%s: Add a characteristic into Service", __func__);
APPL_TRACE_DEBUG("handle=%d uuid16=0x%x property=0x%x",
value_handle, p_uuid->uu.uuid16, property);
#endif
tBTA_GATTC_SERVICE *service = bta_gattc_find_matching_service(p_srvc_cb->p_srvc_cache, attr_handle);
if (!service) {
APPL_TRACE_ERROR("Illegal action to add char/descr/incl srvc for non-existing service!");
return GATT_WRONG_STATE;
}
/* TODO(jpawlowski): We should use attribute handle, not value handle to refer to characteristic.
This is just a temporary workaround.
*/
if (service->e_handle < value_handle) {
service->e_handle = value_handle;
}
tBTA_GATTC_CHARACTERISTIC *characteristic = osi_malloc(sizeof(tBTA_GATTC_CHARACTERISTIC));
if (!characteristic) {
APPL_TRACE_WARNING("%s(), no resource.", __func__);
return BTA_GATT_NO_RESOURCES;
}
characteristic->handle = value_handle;
characteristic->properties = property;
characteristic->descriptors = list_new(bta_gattc_free);
memcpy(&characteristic->uuid, p_uuid, sizeof(tBT_UUID));
characteristic->service = service;
list_append(service->characteristics, characteristic);
return BTA_GATT_OK;
}
/*******************************************************************************
**
** Function bta_gattc_add_attr_to_cache
**
** Description Add an attribute into database cache buffer.
**
** Returns status
**
*******************************************************************************/
static tBTA_GATT_STATUS bta_gattc_add_attr_to_cache(tBTA_GATTC_SERV *p_srvc_cb,
UINT16 handle,
tBT_UUID *p_uuid,
UINT8 property,
UINT16 incl_srvc_s_handle,
UINT16 incl_srvc_e_handle,
tBTA_GATTC_ATTR_TYPE type)
{
#if (defined BTA_GATT_DEBUG && BTA_GATT_DEBUG == TRUE)
APPL_TRACE_DEBUG("%s: Add a [%s] into Service", __func__, bta_gattc_attr_type[type]);
APPL_TRACE_DEBUG("handle=%d uuid16=0x%x property=0x%x type=%d",
handle, p_uuid->uu.uuid16, property, type);
#endif
tBTA_GATTC_SERVICE *service = bta_gattc_find_matching_service(p_srvc_cb->p_srvc_cache, handle);
if (!service) {
APPL_TRACE_ERROR("Illegal action to add char/descr/incl srvc for non-existing service!");
return GATT_WRONG_STATE;
}
if (type == BTA_GATTC_ATTR_TYPE_INCL_SRVC) {
tBTA_GATTC_INCLUDED_SVC *isvc =
osi_malloc(sizeof(tBTA_GATTC_INCLUDED_SVC));
if (!isvc) {
APPL_TRACE_WARNING("%s(), no resource.", __func__);
return BTA_GATT_NO_RESOURCES;
}
isvc->handle = handle;
memcpy(&isvc->uuid, p_uuid, sizeof(tBT_UUID));
isvc->incl_srvc_s_handle = incl_srvc_s_handle;
isvc->incl_srvc_e_handle = incl_srvc_e_handle;
isvc->owning_service = service;
isvc->included_service = bta_gattc_find_matching_service(
p_srvc_cb->p_srvc_cache, incl_srvc_s_handle);
if (!isvc->included_service) {
// if can't find included service, wait to update later
p_srvc_cb->update_incl_srvc = true;
}
list_append(service->included_svc, isvc);
} else if (type == BTA_GATTC_ATTR_TYPE_CHAR_DESCR) {
tBTA_GATTC_DESCRIPTOR *descriptor =
osi_malloc(sizeof(tBTA_GATTC_DESCRIPTOR));
if (!descriptor) {
APPL_TRACE_WARNING("%s(), no resource.", __func__);
return BTA_GATT_NO_RESOURCES;
}
descriptor->handle = handle;
memcpy(&descriptor->uuid, p_uuid, sizeof(tBT_UUID));
if (service->characteristics == NULL ||
list_is_empty(service->characteristics)) {
APPL_TRACE_ERROR("%s: Illegal action to add descriptor before adding a characteristic!",
__func__);
osi_free(descriptor);
return GATT_WRONG_STATE;
}
tBTA_GATTC_CHARACTERISTIC *char_node = list_back(service->characteristics);
descriptor->characteristic = char_node;
list_append(char_node->descriptors, descriptor);
}
return BTA_GATT_OK;
}
/*******************************************************************************
**
** Function bta_gattc_get_disc_range
**
** Description get discovery stating and ending handle range.
**
** Returns None.
**
*******************************************************************************/
void bta_gattc_get_disc_range(tBTA_GATTC_SERV *p_srvc_cb, UINT16 *p_s_hdl, UINT16 *p_e_hdl, BOOLEAN is_srvc)
{
tBTA_GATTC_ATTR_REC *p_rec = NULL;
if (is_srvc) {
p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->cur_srvc_idx;
*p_s_hdl = p_rec->s_handle;
} else {
p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->cur_char_idx;
*p_s_hdl = p_rec->s_handle + 1;
}
*p_e_hdl = p_rec->e_handle;
#if (defined BTA_GATT_DEBUG && BTA_GATT_DEBUG == TRUE)
APPL_TRACE_DEBUG("discover range [%d ~ %d]", p_rec->s_handle, p_rec->e_handle);
#endif
return;
}
/*******************************************************************************
**
** Function bta_gattc_discover_pri_service
**
** Description Start primary service discovery
**
** Returns status of the operation.
**
*******************************************************************************/
tBTA_GATT_STATUS bta_gattc_discover_pri_service(UINT16 conn_id, tBTA_GATTC_SERV *p_server_cb,
UINT8 disc_type)
{
tBTA_GATTC_CLCB *p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
tBTA_GATT_STATUS status = BTA_GATT_ERROR;
if (p_clcb) {
if (p_clcb->transport == BTA_TRANSPORT_LE) {
status = bta_gattc_discover_procedure(conn_id, p_server_cb, disc_type);
} else {
#if (SDP_INCLUDED == TRUE)
status = bta_gattc_sdp_service_disc(conn_id, p_server_cb);
#endif ///SDP_INCLUDED == TRUE
}
}
return status;
}
/*******************************************************************************
**
** Function bta_gattc_discover_procedure
**
** Description Start a particular type of discovery procedure on server.
**
** Returns status of the operation.
**
*******************************************************************************/
tBTA_GATT_STATUS bta_gattc_discover_procedure(UINT16 conn_id, tBTA_GATTC_SERV *p_server_cb,
UINT8 disc_type)
{
tGATT_DISC_PARAM param;
BOOLEAN is_service = TRUE;
memset(¶m, 0, sizeof(tGATT_DISC_PARAM));
if (disc_type == GATT_DISC_SRVC_ALL || disc_type == GATT_DISC_SRVC_BY_UUID) {
param.s_handle = 1;
param.e_handle = 0xFFFF;
} else {
if (disc_type == GATT_DISC_CHAR_DSCPT) {
is_service = FALSE;
}
bta_gattc_get_disc_range(p_server_cb, ¶m.s_handle, ¶m.e_handle, is_service);
if (param.s_handle > param.e_handle) {
return GATT_ERROR;
}
}
return GATTC_Discover (conn_id, disc_type, ¶m);
}
/*******************************************************************************
**
** Function bta_gattc_start_disc_include_srvc
**
** Description Start discovery for included service
**
** Returns status of the operation.
**
*******************************************************************************/
tBTA_GATT_STATUS bta_gattc_start_disc_include_srvc(UINT16 conn_id, tBTA_GATTC_SERV *p_srvc_cb)
{
return bta_gattc_discover_procedure(conn_id, p_srvc_cb, GATT_DISC_INC_SRVC);
}
/*******************************************************************************
**
** Function bta_gattc_start_disc_char
**
** Description Start discovery for characteristic
**
** Returns status of the operation.
**
*******************************************************************************/
tBTA_GATT_STATUS bta_gattc_start_disc_char(UINT16 conn_id, tBTA_GATTC_SERV *p_srvc_cb)
{
p_srvc_cb->total_char = 0;
return bta_gattc_discover_procedure(conn_id, p_srvc_cb, GATT_DISC_CHAR);
}
/*******************************************************************************
**
** Function bta_gattc_start_disc_char_dscp
**
** Description Start discovery for characteristic descriptor
**
** Returns none.
**
*******************************************************************************/
void bta_gattc_start_disc_char_dscp(UINT16 conn_id, tBTA_GATTC_SERV *p_srvc_cb)
{
APPL_TRACE_DEBUG("starting discover characteristics descriptor");
if (bta_gattc_discover_procedure(conn_id, p_srvc_cb, GATT_DISC_CHAR_DSCPT) != 0) {
bta_gattc_char_dscpt_disc_cmpl(conn_id, p_srvc_cb);
}
}
void bta_gattc_update_include_service(const list_t *services) {
if (!services || list_is_empty(services)) {
return;
}
for (list_node_t *sn = list_begin(services); sn != list_end(services); sn = list_next(sn)) {
tBTA_GATTC_SERVICE *service = list_node(sn);
if(!service || !service->included_svc || list_is_empty(service->included_svc)) break;
for (list_node_t *sn = list_begin(service->included_svc); sn != list_end(service->included_svc); sn = list_next(sn)) {
tBTA_GATTC_INCLUDED_SVC *include_service = list_node(sn);
if(include_service && !include_service->included_service) {
//update
include_service->included_service = bta_gattc_find_matching_service(services, include_service->incl_srvc_s_handle);
if(!include_service->included_service) {
//not match, free it
list_remove(service->included_svc, include_service);
osi_free(include_service);
}
}
}
}
}
/*******************************************************************************
**
** Function bta_gattc_explore_srvc
**
** Description process the service discovery complete event
**
** Returns status
**
*******************************************************************************/
static void bta_gattc_explore_srvc(UINT16 conn_id, tBTA_GATTC_SERV *p_srvc_cb)
{
tBTA_GATTC_ATTR_REC *p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->cur_srvc_idx;
tBTA_GATTC_CLCB *p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
APPL_TRACE_DEBUG("Start service discovery: srvc_idx = %d", p_srvc_cb->cur_srvc_idx);
p_srvc_cb->cur_char_idx = p_srvc_cb->next_avail_idx = p_srvc_cb->total_srvc;
if (p_clcb == NULL) {
APPL_TRACE_ERROR("unknown connection ID");
return;
}
/* start expore a service if there is service not been explored */
if (p_srvc_cb->cur_srvc_idx < p_srvc_cb->total_srvc) {
/* add the first service into cache */
if (bta_gattc_add_srvc_to_cache (p_srvc_cb,
p_rec->s_handle,
p_rec->e_handle,
&p_rec->uuid,
p_rec->is_primary) == 0) {
/* start discovering included services */
bta_gattc_start_disc_include_srvc(conn_id, p_srvc_cb);
return;
}
}
// if update_incl_srvc is true, update include service
if(p_srvc_cb->update_incl_srvc) {
bta_gattc_update_include_service(p_srvc_cb->p_srvc_cache);
p_srvc_cb->update_incl_srvc = false;
}
/* no service found at all, the end of server discovery*/
APPL_TRACE_DEBUG("%s no more services found", __func__);
#if (defined BTA_GATT_DEBUG && BTA_GATT_DEBUG == TRUE)
bta_gattc_display_cache_server(p_srvc_cb->p_srvc_cache);
#endif
//server discover end, update connection parameters
#if BLE_INCLUDED == TRUE
#if (BT_MULTI_CONNECTION_ENBALE == FALSE)
if (p_clcb->transport == BTA_TRANSPORT_LE) {
L2CA_EnableUpdateBleConnParams(p_clcb->p_srcb->server_bda, TRUE);
}
#endif
//discover service complete, trigger callback
tBTA_GATTC cb_data;
cb_data.dis_cmpl.status = p_clcb->status;
cb_data.dis_cmpl.conn_id = conn_id;
( *p_clcb->p_rcb->p_cback)(BTA_GATTC_DIS_SRVC_CMPL_EVT, &cb_data);
#endif
#if(GATTC_CACHE_NVS == TRUE)
/* save cache to NV */
p_clcb->p_srcb->state = BTA_GATTC_SERV_SAVE;
bta_gattc_cache_save(p_clcb->p_srcb, p_clcb->bta_conn_id);
#endif
bta_gattc_reset_discover_st(p_clcb->p_srcb, BTA_GATT_OK);
}
/*******************************************************************************
**
** Function bta_gattc_incl_srvc_disc_cmpl
**
** Description process the relationship discovery complete event
**
** Returns status
**
*******************************************************************************/
static void bta_gattc_incl_srvc_disc_cmpl(UINT16 conn_id, tBTA_GATTC_SERV *p_srvc_cb)
{
p_srvc_cb->cur_char_idx = p_srvc_cb->total_srvc;
/* start discoverying characteristic */
bta_gattc_start_disc_char(conn_id, p_srvc_cb);
}
/*******************************************************************************
**
** Function bta_gattc_char_disc_cmpl
**
** Description process the characteristic discovery complete event
**
** Returns status
**
*******************************************************************************/
static void bta_gattc_char_disc_cmpl(UINT16 conn_id, tBTA_GATTC_SERV *p_srvc_cb)
{
tBTA_GATTC_ATTR_REC *p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->cur_char_idx;
/* if there are characteristic needs to be explored */
if (p_srvc_cb->total_char > 0) {
/* add the first characteristic into cache */
bta_gattc_add_char_to_cache (p_srvc_cb,
p_rec->char_decl_handle,
p_rec->s_handle,
&p_rec->uuid,
p_rec->property);
/* start discoverying characteristic descriptor , if failed, disc for next char */
bta_gattc_start_disc_char_dscp(conn_id, p_srvc_cb);
} else { /* otherwise start with next service */
p_srvc_cb->cur_srvc_idx ++;
bta_gattc_explore_srvc (conn_id, p_srvc_cb);
}
}
/*******************************************************************************
**
** Function bta_gattc_char_dscpt_disc_cmpl
**
** Description process the char descriptor discovery complete event
**
** Returns status
**
*******************************************************************************/
static void bta_gattc_char_dscpt_disc_cmpl(UINT16 conn_id, tBTA_GATTC_SERV *p_srvc_cb)
{
tBTA_GATTC_ATTR_REC *p_rec = NULL;
/* Recursive function will cause BTU stack overflow when there are a large number of characteristic
* without descriptor to discover. So replace it with while function */
while (--p_srvc_cb->total_char > 0) {
p_rec = p_srvc_cb->p_srvc_list + (++ p_srvc_cb->cur_char_idx);
/* add the next characteristic into cache */
bta_gattc_add_char_to_cache (p_srvc_cb,
p_rec->char_decl_handle,
p_rec->s_handle,
&p_rec->uuid,
p_rec->property);
/* start to discover next characteristic for descriptor */
if (bta_gattc_discover_procedure(conn_id, p_srvc_cb, GATT_DISC_CHAR_DSCPT) == 0) {
/* send att req and wait for att rsp */
break;
}
}
if (p_srvc_cb->total_char == 0) /* all characteristic has been explored, start with next service if any */
{
#if (defined BTA_GATT_DEBUG && BTA_GATT_DEBUG == TRUE)
APPL_TRACE_ERROR("all char has been explored");
#endif
p_srvc_cb->cur_srvc_idx ++;
bta_gattc_explore_srvc (conn_id, p_srvc_cb);
}
}
static BOOLEAN bta_gattc_srvc_in_list(tBTA_GATTC_SERV *p_srvc_cb, UINT16 s_handle,
UINT16 e_handle, tBT_UUID uuid)
{
tBTA_GATTC_ATTR_REC *p_rec = NULL;
UINT8 i;
BOOLEAN exist_srvc = FALSE;
UNUSED(uuid);
if (!GATT_HANDLE_IS_VALID(s_handle) || !GATT_HANDLE_IS_VALID(e_handle)) {
APPL_TRACE_ERROR("invalid included service handle: [0x%04x ~ 0x%04x]", s_handle, e_handle);
exist_srvc = TRUE;
} else {
for (i = 0; i < p_srvc_cb->next_avail_idx; i ++) {
p_rec = p_srvc_cb->p_srvc_list + i;
/* a new service should not have any overlap with other service handle range */
if (p_rec->s_handle == s_handle || p_rec->e_handle == e_handle) {
exist_srvc = TRUE;
break;
}
}
}
return exist_srvc;
}
/*******************************************************************************
**
** Function bta_gattc_add_srvc_to_list
**
** Description Add a service into explore pending list
**
** Returns status
**
*******************************************************************************/
static tBTA_GATT_STATUS bta_gattc_add_srvc_to_list(tBTA_GATTC_SERV *p_srvc_cb,
UINT16 s_handle, UINT16 e_handle,
tBT_UUID uuid, BOOLEAN is_primary)
{
tBTA_GATTC_ATTR_REC *p_rec = NULL;
tBTA_GATT_STATUS status = BTA_GATT_OK;
if (p_srvc_cb->p_srvc_list && p_srvc_cb->next_avail_idx < BTA_GATTC_MAX_CACHE_CHAR) {
p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->next_avail_idx;
APPL_TRACE_DEBUG("%s handle=%d, service type=0x%04x",
__func__, s_handle, uuid.uu.uuid16);
p_rec->s_handle = s_handle;
p_rec->e_handle = e_handle;
p_rec->is_primary = is_primary;
memcpy(&p_rec->uuid, &uuid, sizeof(tBT_UUID));
p_srvc_cb->total_srvc ++;
p_srvc_cb->next_avail_idx ++;
} else {
/* allocate bigger buffer ?? */
status = GATT_DB_FULL;
APPL_TRACE_ERROR("service not added, no resources or wrong state, see CONFIG_BT_GATTC_MAX_CACHE_CHAR");
}
return status;
}
/*******************************************************************************
**
** Function bta_gattc_add_char_to_list
**
** Description Add a characteristic into explore pending list
**
** Returns status
**
*******************************************************************************/
static tBTA_GATT_STATUS bta_gattc_add_char_to_list(tBTA_GATTC_SERV *p_srvc_cb,
UINT16 decl_handle, UINT16 value_handle,
tBT_UUID uuid, UINT8 property)
{
tBTA_GATTC_ATTR_REC *p_rec = NULL;
tBTA_GATT_STATUS status = BTA_GATT_OK;
if (p_srvc_cb->p_srvc_list == NULL) {
APPL_TRACE_ERROR("No service available, unexpected char discovery result");
status = BTA_GATT_INTERNAL_ERROR;
} else if (p_srvc_cb->next_avail_idx < BTA_GATTC_MAX_CACHE_CHAR) {
p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->next_avail_idx;
p_srvc_cb->total_char ++;
p_rec->s_handle = value_handle;
p_rec->char_decl_handle = decl_handle;
p_rec->property = property;
p_rec->e_handle = (p_srvc_cb->p_srvc_list + p_srvc_cb->cur_srvc_idx)->e_handle;
memcpy(&p_rec->uuid, &uuid, sizeof(tBT_UUID));
/* update the endind handle of pervious characteristic if available */
if (p_srvc_cb->total_char > 1) {
p_rec -= 1;
p_rec->e_handle = decl_handle - 1;
}
p_srvc_cb->next_avail_idx ++;
} else {
APPL_TRACE_ERROR("char not added, no resources, see CONFIG_BT_GATTC_MAX_CACHE_CHAR");
/* allocate bigger buffer ?? */
status = BTA_GATT_DB_FULL;
}
return status;
}
/*******************************************************************************
**
** Function bta_gattc_sdp_callback
**
** Description Process the discovery result from sdp
**
** Returns void
**
*******************************************************************************/
#if (SDP_INCLUDED == TRUE)
void bta_gattc_sdp_callback(UINT16 sdp_status, void* user_data)
{
tSDP_DISC_REC *p_sdp_rec = NULL;
tBT_UUID service_uuid;
tSDP_PROTOCOL_ELEM pe;
UINT16 start_handle = 0, end_handle = 0;
tBTA_GATTC_CB_DATA *cb_data = user_data;
tBTA_GATTC_SERV *p_srvc_cb = bta_gattc_find_scb_by_cid(cb_data->sdp_conn_id);
if (((sdp_status == SDP_SUCCESS) || (sdp_status == SDP_DB_FULL)) && p_srvc_cb != NULL) {
do {
/* find a service record, report it */
p_sdp_rec = SDP_FindServiceInDb(cb_data->p_sdp_db, 0, p_sdp_rec);
if (p_sdp_rec) {
if (SDP_FindServiceUUIDInRec(p_sdp_rec, &service_uuid)) {
if (SDP_FindProtocolListElemInRec(p_sdp_rec, UUID_PROTOCOL_ATT, &pe)) {
start_handle = (UINT16) pe.params[0];
end_handle = (UINT16) pe.params[1];
#if (defined BTA_GATT_DEBUG && BTA_GATT_DEBUG == TRUE)
APPL_TRACE_EVENT("Found ATT service [0x%04x] handle[0x%04x ~ 0x%04x]",
service_uuid.uu.uuid16, start_handle, end_handle);
#endif
if (GATT_HANDLE_IS_VALID(start_handle) && GATT_HANDLE_IS_VALID(end_handle) &&
p_srvc_cb != NULL) {
/* discover services result, add services into a service list */
bta_gattc_add_srvc_to_list(p_srvc_cb,
start_handle,
end_handle,
service_uuid,
TRUE);
} else {
APPL_TRACE_ERROR("invalid start_handle = %d end_handle = %d",
start_handle, end_handle);
}
}
}
}
} while (p_sdp_rec);
}
if ( p_srvc_cb != NULL)
{
/* start discover primary service */
bta_gattc_explore_srvc(cb_data->sdp_conn_id, p_srvc_cb);
}
else
{
APPL_TRACE_ERROR("GATT service discovery is done on unknown connection");
}
/* both were allocated in bta_gattc_sdp_service_disc */
osi_free(cb_data->p_sdp_db);
osi_free(cb_data);
}
#endif ///SDP_INCLUDED == TRUE
/*******************************************************************************
**
** Function bta_gattc_sdp_service_disc
**
** Description Start DSP Service Discovert
**
** Returns void
**
*******************************************************************************/
#if (SDP_INCLUDED == TRUE)
static tBTA_GATT_STATUS bta_gattc_sdp_service_disc(UINT16 conn_id, tBTA_GATTC_SERV *p_server_cb)
{
tSDP_UUID uuid;
UINT16 num_attrs = 2;
UINT16 attr_list[2];
memset (&uuid, 0, sizeof(tSDP_UUID));
uuid.len = LEN_UUID_16;
uuid.uu.uuid16 = UUID_PROTOCOL_ATT;
/*
* On success, cb_data will be freed inside bta_gattc_sdp_callback,
* otherwise it will be freed within this function.
*/
tBTA_GATTC_CB_DATA *cb_data =
(tBTA_GATTC_CB_DATA *)osi_malloc(sizeof(tBTA_GATTC_CB_DATA));
cb_data->p_sdp_db = (tSDP_DISCOVERY_DB *)osi_malloc(BTA_GATT_SDP_DB_SIZE);
if (!cb_data || cb_data->p_sdp_db) {
APPL_TRACE_WARNING("%s(), no resource.", __func__);
return BTA_GATT_NO_RESOURCES;
}
attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST;
SDP_InitDiscoveryDb(cb_data->p_sdp_db, BTA_GATT_SDP_DB_SIZE, 1,
&uuid, num_attrs, attr_list);
if (!SDP_ServiceSearchAttributeRequest2(p_server_cb->server_bda,
cb_data->p_sdp_db, &bta_gattc_sdp_callback, cb_data))
{
osi_free(cb_data->p_sdp_db);
osi_free(cb_data);
return BTA_GATT_ERROR;
}
cb_data->sdp_conn_id = conn_id;
return BTA_GATT_OK;
}
#endif ///SDP_INCLUDED == TRUE
/*******************************************************************************
**
** Function bta_gattc_disc_res_cback
** bta_gattc_disc_cmpl_cback
**
** Description callback functions to GATT client stack.
**
** Returns void
**
*******************************************************************************/
void bta_gattc_disc_res_cback (UINT16 conn_id, tGATT_DISC_TYPE disc_type, tGATT_DISC_RES *p_data)
{
tBTA_GATTC_SERV *p_srvc_cb = NULL;
BOOLEAN pri_srvc;
tBTA_GATTC_CLCB *p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
p_srvc_cb = bta_gattc_find_scb_by_cid(conn_id);
if (p_srvc_cb != NULL && p_clcb != NULL && p_clcb->state == BTA_GATTC_DISCOVER_ST) {
p_srvc_cb->total_attr++;
switch (disc_type) {
case GATT_DISC_SRVC_ALL:
/* discover services result, add services into a service list */
bta_gattc_add_srvc_to_list(p_srvc_cb,
p_data->handle,
p_data->value.group_value.e_handle,
p_data->value.group_value.service_type,
TRUE);
break;
case GATT_DISC_SRVC_BY_UUID:
bta_gattc_add_srvc_to_list(p_srvc_cb,
p_data->handle,
p_data->value.group_value.e_handle,
p_data->value.group_value.service_type,
TRUE);
break;
case GATT_DISC_INC_SRVC:
/* add included service into service list if it's secondary or it never showed up
in the primary service search */
pri_srvc = bta_gattc_srvc_in_list(p_srvc_cb,
p_data->value.incl_service.s_handle,
p_data->value.incl_service.e_handle,
p_data->value.incl_service.service_type);