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components/bt/host/bluedroid/bta/gatt/bta_gatts_utils.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 utility function.
*
******************************************************************************/
#include "common/bt_target.h"
#if defined(GATTS_INCLUDED) && (GATTS_INCLUDED == TRUE)
#include <string.h>
#include "bta/utl.h"
#include "bta/bta_sys.h"
#include "bta_gatts_int.h"
static const UINT8 base_uuid[LEN_UUID_128] = {0xFB, 0x34, 0x9B, 0x5F, 0x80, 0x00, 0x00, 0x80,
0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/*******************************************************************************
**
** Function bta_gatt_convert_uuid16_to_uuid128
**
** Description Convert a 16 bits UUID to be an standard 128 bits one.
**
** Returns TRUE if two uuid match; FALSE otherwise.
**
*******************************************************************************/
static void bta_gatt_convert_uuid16_to_uuid128(UINT8 uuid_128[LEN_UUID_128], UINT16 uuid_16)
{
UINT8 *p = &uuid_128[LEN_UUID_128 - 4];
memcpy (uuid_128, base_uuid, LEN_UUID_128);
UINT16_TO_STREAM(p, uuid_16);
}
/*******************************************************************************
**
** Function bta_gatts_alloc_srvc_cb
**
** Description allocate a service control block.
**
** Returns pointer to the control block, or otherwise NULL when failed.
**
*******************************************************************************/
UINT8 bta_gatts_alloc_srvc_cb(tBTA_GATTS_CB *p_cb, UINT8 rcb_idx)
{
UINT8 i;
for (i = 0; i < BTA_GATTS_MAX_SRVC_NUM; i ++) {
if (!p_cb->srvc_cb[i].in_use) {
p_cb->srvc_cb[i].in_use = TRUE;
p_cb->srvc_cb[i].rcb_idx = rcb_idx;
return i;
}
}
return BTA_GATTS_INVALID_APP;
}
/*******************************************************************************
**
** Function bta_gatts_find_app_rcb_by_app_if
**
** Description find the index of the application control block by app ID.
**
** Returns pointer to the control block if success, otherwise NULL
**
*******************************************************************************/
tBTA_GATTS_RCB *bta_gatts_find_app_rcb_by_app_if(tBTA_GATTS_IF server_if)
{
UINT8 i;
tBTA_GATTS_RCB *p_reg;
for (i = 0, p_reg = bta_gatts_cb.rcb; i < BTA_GATTS_MAX_APP_NUM; i ++, p_reg++) {
if (p_reg->in_use && p_reg->gatt_if == server_if) {
return p_reg;
}
}
return NULL;
}
/*******************************************************************************
**
** Function bta_gatts_find_app_rcb_idx_by_app_if
**
** Description find the index of the application control block by app ID.
**
** Returns index of the control block, or BTA_GATTS_INVALID_APP if failed.
**
*******************************************************************************/
UINT8 bta_gatts_find_app_rcb_idx_by_app_if(tBTA_GATTS_CB *p_cb, tBTA_GATTS_IF server_if)
{
UINT8 i;
for (i = 0; i < BTA_GATTS_MAX_APP_NUM; i ++) {
if (p_cb->rcb[i].in_use && p_cb->rcb[i].gatt_if == server_if) {
return i;
}
}
return BTA_GATTS_INVALID_APP;
}
/*******************************************************************************
**
** Function bta_gatts_find_srvc_cb_by_srvc_id
**
** Description find the service control block by service ID.
**
** Returns pointer to the rcb.
**
*******************************************************************************/
tBTA_GATTS_SRVC_CB *bta_gatts_find_srvc_cb_by_srvc_id(tBTA_GATTS_CB *p_cb, UINT16 service_id)
{
UINT8 i;
APPL_TRACE_DEBUG("bta_gatts_find_srvc_cb_by_srvc_id service_id=%d", service_id);
for (i = 0; i < BTA_GATTS_MAX_SRVC_NUM; i ++) {
if (p_cb->srvc_cb[i].in_use &&
p_cb->srvc_cb[i].service_id == service_id) {
APPL_TRACE_DEBUG("bta_gatts_find_srvc_cb_by_srvc_id found service cb index =%d", i);
return &p_cb->srvc_cb[i];
}
}
return NULL;
}
/*******************************************************************************
**
** Function bta_gatts_find_srvc_cb_by_attr_id
**
** Description find the service control block by attribute ID.
**
** Returns pointer to the rcb.
**
*******************************************************************************/
tBTA_GATTS_SRVC_CB *bta_gatts_find_srvc_cb_by_attr_id(tBTA_GATTS_CB *p_cb, UINT16 attr_id)
{
UINT8 i;
for (i = 0; i < (BTA_GATTS_MAX_SRVC_NUM); i ++) {
if (/* middle service */
(i < (BTA_GATTS_MAX_SRVC_NUM - 1) &&
p_cb->srvc_cb[i].in_use &&
p_cb->srvc_cb[i + 1].in_use &&
attr_id >= p_cb->srvc_cb[i].service_id &&
attr_id < p_cb->srvc_cb[i + 1].service_id) ||
/* last active service */
(i < (BTA_GATTS_MAX_SRVC_NUM - 1) &&
p_cb->srvc_cb[i].in_use &&
!p_cb->srvc_cb[i + 1].in_use &&
attr_id >= p_cb->srvc_cb[i].service_id) ||
/* last service incb */
(i == (BTA_GATTS_MAX_SRVC_NUM - 1) &&
attr_id >= p_cb->srvc_cb[i].service_id)
) {
return &p_cb->srvc_cb[i];
}
}
return NULL;
}
/*******************************************************************************
**
** Function bta_gatts_uuid_compare
**
** Description Compare two UUID to see if they are the same.
**
** Returns TRUE if two uuid match; FALSE otherwise.
**
*******************************************************************************/
BOOLEAN bta_gatts_uuid_compare(tBT_UUID tar, tBT_UUID src)
{
UINT8 su[LEN_UUID_128], tu[LEN_UUID_128];
UINT8 *ps, *pt;
/* any of the UUID is unspecified */
if (src.len == 0 || tar.len == 0) {
return TRUE;
}
/* If both are 16-bit, we can do a simple compare */
if (src.len == 2 && tar.len == 2) {
return src.uu.uuid16 == tar.uu.uuid16;
}
/* One or both of the UUIDs is 128-bit */
if (src.len == LEN_UUID_16) {
/* convert a 16 bits UUID to 128 bits value */
bta_gatt_convert_uuid16_to_uuid128(su, src.uu.uuid16);
ps = su;
} else {
ps = src.uu.uuid128;
}
if (tar.len == LEN_UUID_16) {
/* convert a 16 bits UUID to 128 bits value */
bta_gatt_convert_uuid16_to_uuid128(tu, tar.uu.uuid16);
pt = tu;
} else {
pt = tar.uu.uuid128;
}
return (memcmp(ps, pt, LEN_UUID_128) == 0);
}
#endif /* GATTS_INCLUDED */
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