460 lines
15 KiB
C++
460 lines
15 KiB
C++
/******************************************************************************
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*
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* Copyright 2008-2012 Broadcom Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* this file contains the main GATT server attributes access request
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* handling functions.
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*
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******************************************************************************/
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#include "bt_target.h"
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#include "bt_utils.h"
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#include "gatt_api.h"
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#include "gatt_int.h"
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#include "osi/include/osi.h"
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using base::StringPrintf;
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using bluetooth::Uuid;
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#define GATTP_MAX_NUM_INC_SVR 0
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#define GATTP_MAX_CHAR_NUM 2
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#define GATTP_MAX_ATTR_NUM (GATTP_MAX_CHAR_NUM * 2 + GATTP_MAX_NUM_INC_SVR + 1)
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#define GATTP_MAX_CHAR_VALUE_SIZE 50
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#ifndef GATTP_ATTR_DB_SIZE
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#define GATTP_ATTR_DB_SIZE \
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GATT_DB_MEM_SIZE(GATTP_MAX_NUM_INC_SVR, GATTP_MAX_CHAR_NUM, \
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GATTP_MAX_CHAR_VALUE_SIZE)
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#endif
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static void gatt_request_cback(uint16_t conn_id, uint32_t trans_id,
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uint8_t op_code, tGATTS_DATA* p_data);
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static void gatt_connect_cback(UNUSED_ATTR tGATT_IF gatt_if,
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const RawAddress& bda, uint16_t conn_id,
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bool connected, tGATT_DISCONN_REASON reason,
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tBT_TRANSPORT transport);
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static void gatt_disc_res_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
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tGATT_DISC_RES* p_data);
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static void gatt_disc_cmpl_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
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tGATT_STATUS status);
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static void gatt_cl_op_cmpl_cback(UNUSED_ATTR uint16_t conn_id,
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UNUSED_ATTR tGATTC_OPTYPE op,
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UNUSED_ATTR tGATT_STATUS status,
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UNUSED_ATTR tGATT_CL_COMPLETE* p_data);
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static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB* p_clcb);
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static tGATT_CBACK gatt_profile_cback = {gatt_connect_cback,
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gatt_cl_op_cmpl_cback,
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gatt_disc_res_cback,
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gatt_disc_cmpl_cback,
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gatt_request_cback,
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NULL,
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NULL,
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NULL,
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NULL};
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/*******************************************************************************
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*
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* Function gatt_profile_find_conn_id_by_bd_addr
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*
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* Description Find the connection ID by remote address
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*
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* Returns Connection ID
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*
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******************************************************************************/
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uint16_t gatt_profile_find_conn_id_by_bd_addr(const RawAddress& remote_bda) {
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uint16_t conn_id = GATT_INVALID_CONN_ID;
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GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &conn_id,
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BT_TRANSPORT_LE);
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if (conn_id == GATT_INVALID_CONN_ID)
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GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &conn_id,
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BT_TRANSPORT_BR_EDR);
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return conn_id;
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}
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/*******************************************************************************
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*
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* Function gatt_profile_find_clcb_by_conn_id
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*
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* Description find clcb by Connection ID
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*
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* Returns Pointer to the found link conenction control block.
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*
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******************************************************************************/
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static tGATT_PROFILE_CLCB* gatt_profile_find_clcb_by_conn_id(uint16_t conn_id) {
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uint8_t i_clcb;
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tGATT_PROFILE_CLCB* p_clcb = NULL;
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for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS;
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i_clcb++, p_clcb++) {
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if (p_clcb->in_use && p_clcb->conn_id == conn_id) return p_clcb;
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}
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return NULL;
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}
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/*******************************************************************************
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*
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* Function gatt_profile_find_clcb_by_bd_addr
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*
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* Description The function searches all LCBs with macthing bd address.
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*
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* Returns Pointer to the found link conenction control block.
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*
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******************************************************************************/
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static tGATT_PROFILE_CLCB* gatt_profile_find_clcb_by_bd_addr(
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const RawAddress& bda, tBT_TRANSPORT transport) {
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uint8_t i_clcb;
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tGATT_PROFILE_CLCB* p_clcb = NULL;
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for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS;
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i_clcb++, p_clcb++) {
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if (p_clcb->in_use && p_clcb->transport == transport && p_clcb->connected &&
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p_clcb->bda == bda)
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return p_clcb;
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}
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return NULL;
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}
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/*******************************************************************************
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*
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* Function gatt_profile_clcb_alloc
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*
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* Description The function allocates a GATT profile connection link
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* control block
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*
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* Returns NULL if not found. Otherwise pointer to the connection link
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* block.
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*
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******************************************************************************/
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tGATT_PROFILE_CLCB* gatt_profile_clcb_alloc(uint16_t conn_id,
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const RawAddress& bda,
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tBT_TRANSPORT tranport) {
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uint8_t i_clcb = 0;
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tGATT_PROFILE_CLCB* p_clcb = NULL;
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for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS;
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i_clcb++, p_clcb++) {
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if (!p_clcb->in_use) {
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p_clcb->in_use = true;
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p_clcb->conn_id = conn_id;
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p_clcb->connected = true;
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p_clcb->transport = tranport;
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p_clcb->bda = bda;
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break;
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}
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}
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if (i_clcb < GATT_MAX_APPS) return p_clcb;
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return NULL;
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}
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/*******************************************************************************
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*
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* Function gatt_profile_clcb_dealloc
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*
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* Description The function deallocates a GATT profile connection link
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* control block
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*
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* Returns void
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*
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******************************************************************************/
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void gatt_profile_clcb_dealloc(tGATT_PROFILE_CLCB* p_clcb) {
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memset(p_clcb, 0, sizeof(tGATT_PROFILE_CLCB));
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}
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/*******************************************************************************
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*
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* Function gatt_request_cback
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*
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* Description GATT profile attribute access request callback.
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*
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* Returns void.
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*
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******************************************************************************/
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static void gatt_request_cback(uint16_t conn_id, uint32_t trans_id,
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tGATTS_REQ_TYPE type, tGATTS_DATA* p_data) {
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uint8_t status = GATT_INVALID_PDU;
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tGATTS_RSP rsp_msg;
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bool ignore = false;
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memset(&rsp_msg, 0, sizeof(tGATTS_RSP));
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switch (type) {
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case GATTS_REQ_TYPE_READ_CHARACTERISTIC:
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case GATTS_REQ_TYPE_READ_DESCRIPTOR:
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status = GATT_READ_NOT_PERMIT;
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break;
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case GATTS_REQ_TYPE_WRITE_CHARACTERISTIC:
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case GATTS_REQ_TYPE_WRITE_DESCRIPTOR:
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status = GATT_WRITE_NOT_PERMIT;
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break;
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case GATTS_REQ_TYPE_WRITE_EXEC:
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case GATT_CMD_WRITE:
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ignore = true;
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VLOG(1) << "Ignore GATT_REQ_EXEC_WRITE/WRITE_CMD";
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break;
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case GATTS_REQ_TYPE_MTU:
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VLOG(1) << "Get MTU exchange new mtu size: " << +p_data->mtu;
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ignore = true;
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break;
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default:
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VLOG(1) << "Unknown/unexpected LE GAP ATT request: " << loghex(type);
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break;
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}
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if (!ignore) GATTS_SendRsp(conn_id, trans_id, status, &rsp_msg);
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}
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/*******************************************************************************
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*
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* Function gatt_connect_cback
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*
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* Description Gatt profile connection callback.
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*
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* Returns void
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*
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******************************************************************************/
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static void gatt_connect_cback(UNUSED_ATTR tGATT_IF gatt_if,
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const RawAddress& bda, uint16_t conn_id,
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bool connected, tGATT_DISCONN_REASON reason,
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tBT_TRANSPORT transport) {
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VLOG(1) << __func__ << ": from " << bda << " connected: " << connected
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<< ", conn_id: " << loghex(conn_id) << "reason: " << loghex(reason);
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tGATT_PROFILE_CLCB* p_clcb =
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gatt_profile_find_clcb_by_bd_addr(bda, transport);
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if (p_clcb == NULL) return;
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if (connected) {
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p_clcb->conn_id = conn_id;
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p_clcb->connected = true;
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if (p_clcb->ccc_stage == GATT_SVC_CHANGED_CONNECTING) {
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p_clcb->ccc_stage++;
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gatt_cl_start_config_ccc(p_clcb);
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}
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} else {
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gatt_profile_clcb_dealloc(p_clcb);
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}
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}
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/*******************************************************************************
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*
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* Function gatt_profile_db_init
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*
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* Description Initializa the GATT profile attribute database.
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*
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******************************************************************************/
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void gatt_profile_db_init(void) {
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uint16_t service_handle = 0;
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/* Fill our internal UUID with a fixed pattern 0x81 */
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std::array<uint8_t, Uuid::kNumBytes128> tmp;
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tmp.fill(0x81);
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/* Create a GATT profile service */
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gatt_cb.gatt_if = GATT_Register(Uuid::From128BitBE(tmp), &gatt_profile_cback);
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GATT_StartIf(gatt_cb.gatt_if);
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Uuid service_uuid = Uuid::From16Bit(UUID_SERVCLASS_GATT_SERVER);
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Uuid char_uuid = Uuid::From16Bit(GATT_UUID_GATT_SRV_CHGD);
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btgatt_db_element_t service[] = {
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{
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.uuid = service_uuid,
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.type = BTGATT_DB_PRIMARY_SERVICE,
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},
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{
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.uuid = char_uuid,
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.type = BTGATT_DB_CHARACTERISTIC,
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.properties = GATT_CHAR_PROP_BIT_INDICATE,
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.permissions = 0,
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}};
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GATTS_AddService(gatt_cb.gatt_if, service,
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sizeof(service) / sizeof(btgatt_db_element_t));
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service_handle = service[0].attribute_handle;
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gatt_cb.handle_of_h_r = service[1].attribute_handle;
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VLOG(1) << __func__ << ": gatt_if=" << +gatt_cb.gatt_if;
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}
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/*******************************************************************************
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*
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* Function gatt_disc_res_cback
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*
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* Description Gatt profile discovery result callback
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*
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* Returns void
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*
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******************************************************************************/
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static void gatt_disc_res_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
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tGATT_DISC_RES* p_data) {
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tGATT_PROFILE_CLCB* p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
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if (p_clcb == NULL) return;
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switch (disc_type) {
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case GATT_DISC_SRVC_BY_UUID: /* stage 1 */
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p_clcb->e_handle = p_data->value.group_value.e_handle;
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p_clcb->ccc_result++;
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break;
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case GATT_DISC_CHAR: /* stage 2 */
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p_clcb->s_handle = p_data->value.dclr_value.val_handle;
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p_clcb->ccc_result++;
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break;
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case GATT_DISC_CHAR_DSCPT: /* stage 3 */
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if (p_data->type == Uuid::From16Bit(GATT_UUID_CHAR_CLIENT_CONFIG)) {
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p_clcb->s_handle = p_data->handle;
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p_clcb->ccc_result++;
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}
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break;
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}
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}
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/*******************************************************************************
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*
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* Function gatt_disc_cmpl_cback
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*
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* Description Gatt profile discovery complete callback
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*
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* Returns void
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*
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******************************************************************************/
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static void gatt_disc_cmpl_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
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tGATT_STATUS status) {
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tGATT_PROFILE_CLCB* p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
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if (p_clcb == NULL) return;
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if (status != GATT_SUCCESS || p_clcb->ccc_result == 0) {
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LOG(WARNING) << __func__
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<< ": Unable to register for service changed indication";
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return;
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}
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p_clcb->ccc_result = 0;
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p_clcb->ccc_stage++;
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gatt_cl_start_config_ccc(p_clcb);
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}
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/*******************************************************************************
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*
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* Function gatt_cl_op_cmpl_cback
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*
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* Description Gatt profile client operation complete callback
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*
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* Returns void
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*
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******************************************************************************/
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static void gatt_cl_op_cmpl_cback(UNUSED_ATTR uint16_t conn_id,
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UNUSED_ATTR tGATTC_OPTYPE op,
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UNUSED_ATTR tGATT_STATUS status,
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UNUSED_ATTR tGATT_CL_COMPLETE* p_data) {}
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/*******************************************************************************
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*
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* Function gatt_cl_start_config_ccc
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*
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* Description Gatt profile start configure service change CCC
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*
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* Returns void
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*
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******************************************************************************/
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static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB* p_clcb) {
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VLOG(1) << __func__ << ": stage: " << +p_clcb->ccc_stage;
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switch (p_clcb->ccc_stage) {
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case GATT_SVC_CHANGED_SERVICE: /* discover GATT service */
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GATTC_Discover(p_clcb->conn_id, GATT_DISC_SRVC_BY_UUID, 0x0001, 0xffff,
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Uuid::From16Bit(UUID_SERVCLASS_GATT_SERVER));
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break;
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case GATT_SVC_CHANGED_CHARACTERISTIC: /* discover service change char */
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GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR, 0x0001, p_clcb->e_handle,
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Uuid::From16Bit(GATT_UUID_GATT_SRV_CHGD));
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break;
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case GATT_SVC_CHANGED_DESCRIPTOR: /* discover service change ccc */
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GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR_DSCPT, p_clcb->s_handle,
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p_clcb->e_handle);
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break;
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case GATT_SVC_CHANGED_CONFIGURE_CCCD: /* write ccc */
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{
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tGATT_VALUE ccc_value;
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memset(&ccc_value, 0, sizeof(tGATT_VALUE));
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ccc_value.handle = p_clcb->s_handle;
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ccc_value.len = 2;
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ccc_value.value[0] = GATT_CLT_CONFIG_INDICATION;
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GATTC_Write(p_clcb->conn_id, GATT_WRITE, &ccc_value);
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break;
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}
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}
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}
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/*******************************************************************************
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*
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* Function GATT_ConfigServiceChangeCCC
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*
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* Description Configure service change indication on remote device
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*
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* Returns none
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*
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******************************************************************************/
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void GATT_ConfigServiceChangeCCC(const RawAddress& remote_bda, bool enable,
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tBT_TRANSPORT transport) {
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tGATT_PROFILE_CLCB* p_clcb =
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gatt_profile_find_clcb_by_bd_addr(remote_bda, transport);
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if (p_clcb == NULL)
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p_clcb = gatt_profile_clcb_alloc(0, remote_bda, transport);
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if (p_clcb == NULL) return;
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if (GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &p_clcb->conn_id,
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transport)) {
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p_clcb->connected = true;
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}
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/* hold the link here */
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GATT_Connect(gatt_cb.gatt_if, remote_bda, true, transport, true);
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p_clcb->ccc_stage = GATT_SVC_CHANGED_CONNECTING;
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if (!p_clcb->connected) {
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/* wait for connection */
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return;
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}
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p_clcb->ccc_stage++;
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gatt_cl_start_config_ccc(p_clcb);
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}
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