/******************************************************************************
*
* Copyright 1999-2012 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 GATT interface functions
*
******************************************************************************/
#include "bt_target.h"
#include <string>
#include <base/strings/string_number_conversions.h>
#include <stdio.h>
#include "bt_common.h"
#include "device/include/controller.h"
#include "gatt_api.h"
#include "gatt_int.h"
#include "l2c_api.h"
#include "main/shim/dumpsys.h"
#include "osi/include/log.h"
#include "stack/gatt/connection_manager.h"
#include "types/bt_transport.h"
using bluetooth::Uuid;
extern bool BTM_BackgroundConnectAddressKnown(const RawAddress& address);
/**
* Add an service handle range to the list in decending order of the start
* handle. Return reference to the newly added element.
**/
tGATT_HDL_LIST_ELEM& gatt_add_an_item_to_list(uint16_t s_handle) {
auto lst_ptr = gatt_cb.hdl_list_info;
auto it = lst_ptr->begin();
for (; it != lst_ptr->end(); it++) {
if (s_handle > it->asgn_range.s_handle) break;
}
auto rit = lst_ptr->emplace(it);
return *rit;
}
/*****************************************************************************
*
* GATT SERVER API
*
*****************************************************************************/
/*******************************************************************************
*
* Function GATTS_AddHandleRange
*
* Description This function add the allocated handles range for the
* specified application UUID, service UUID and service
* instance
*
* Parameter p_hndl_range: pointer to allocated handles information
*
**/
void GATTS_AddHandleRange(tGATTS_HNDL_RANGE* p_hndl_range) {
gatt_add_an_item_to_list(p_hndl_range->s_handle);
}
/*******************************************************************************
*
* Function GATTS_NVRegister
*
* Description Application manager calls this function to register for
* NV save callback function. There can be one and only one
* NV save callback function.
*
* Parameter p_cb_info : callback informaiton
*
* Returns true if registered OK, else false
*
******************************************************************************/
bool GATTS_NVRegister(tGATT_APPL_INFO* p_cb_info) {
bool status = false;
if (p_cb_info) {
gatt_cb.cb_info = *p_cb_info;
status = true;
gatt_init_srv_chg();
}
return status;
}
static uint16_t compute_service_size(btgatt_db_element_t* service, int count) {
int db_size = 0;
btgatt_db_element_t* el = service;
for (int i = 0; i < count; i++, el++)
if (el->type == BTGATT_DB_PRIMARY_SERVICE ||
el->type == BTGATT_DB_SECONDARY_SERVICE ||
el->type == BTGATT_DB_DESCRIPTOR ||
el->type == BTGATT_DB_INCLUDED_SERVICE) {
db_size += 1;
} else if (el->type == BTGATT_DB_CHARACTERISTIC) {
db_size += 2;
// if present, Characteristic Extended Properties takes one handle
if (el->properties & GATT_CHAR_PROP_BIT_EXT_PROP) db_size++;
} else {
LOG(ERROR) << __func__ << ": Unknown element type: " << el->type;
}
return db_size;
}
static bool is_gatt_attr_type(const Uuid& uuid) {
if (uuid == Uuid::From16Bit(GATT_UUID_PRI_SERVICE) ||
uuid == Uuid::From16Bit(GATT_UUID_SEC_SERVICE) ||
uuid == Uuid::From16Bit(GATT_UUID_INCLUDE_SERVICE) ||
uuid == Uuid::From16Bit(GATT_UUID_CHAR_DECLARE)) {
return true;
}
return false;
}
/** Update the the last service info for the service list info */
static void gatt_update_last_srv_info() {
gatt_cb.last_service_handle = 0;
for (tGATT_SRV_LIST_ELEM& el : *gatt_cb.srv_list_info) {
gatt_cb.last_service_handle = el.s_hdl;
}
}
/** Update database hash and client status */
static void gatt_update_for_database_change() {
gatt_cb.database_hash = gatts_calculate_database_hash(gatt_cb.srv_list_info);
uint8_t i = 0;
for (i = 0; i < GATT_MAX_PHY_CHANNEL; i++) {
tGATT_TCB& tcb = gatt_cb.tcb[i];
if (tcb.in_use) gatt_sr_update_cl_status(tcb, /* chg_aware= */ false);
}
}
/*******************************************************************************
*
* Function GATTS_AddService
*
* Description This function is called to add GATT service.
*
* Parameter gatt_if : application if
* service : pseudo-representation of service and it's content
* count : size of service
*
* Returns on success GATT_SERVICE_STARTED is returned, and
* attribute_handle field inside service elements are filled.
* on error error status is returned.
*
******************************************************************************/
tGATT_STATUS GATTS_AddService(tGATT_IF gatt_if, btgatt_db_element_t* service,
int count) {
uint16_t s_hdl = 0;
bool save_hdl = false;
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
bool is_pri = (service->type == BTGATT_DB_PRIMARY_SERVICE) ? true : false;
Uuid svc_uuid = service->uuid;
LOG(INFO) << __func__;
if (!p_reg) {
LOG(ERROR) << "Inavlid gatt_if=" << +gatt_if;
return GATT_INTERNAL_ERROR;
}
uint16_t num_handles = compute_service_size(service, count);
if (svc_uuid == Uuid::From16Bit(UUID_SERVCLASS_GATT_SERVER)) {
s_hdl = gatt_cb.hdl_cfg.gatt_start_hdl;
} else if (svc_uuid == Uuid::From16Bit(UUID_SERVCLASS_GAP_SERVER)) {
s_hdl = gatt_cb.hdl_cfg.gap_start_hdl;
} else {
if (!gatt_cb.hdl_list_info->empty()) {
s_hdl = gatt_cb.hdl_list_info->front().asgn_range.e_handle + 1;
}
if (s_hdl < gatt_cb.hdl_cfg.app_start_hdl)
s_hdl = gatt_cb.hdl_cfg.app_start_hdl;
save_hdl = true;
}
/* check for space */
if (num_handles > (0xFFFF - s_hdl + 1)) {
LOG(ERROR) << __func__ << ": no handles, s_hdl=" << +s_hdl
<< " needed=" << num_handles;
return GATT_INTERNAL_ERROR;
}
tGATT_HDL_LIST_ELEM& list = gatt_add_an_item_to_list(s_hdl);
list.asgn_range.app_uuid128 = p_reg->app_uuid128;
list.asgn_range.svc_uuid = svc_uuid;
list.asgn_range.s_handle = s_hdl;
list.asgn_range.e_handle = s_hdl + num_handles - 1;
list.asgn_range.is_primary = is_pri;
if (save_hdl) {
if (gatt_cb.cb_info.p_nv_save_callback)
(*gatt_cb.cb_info.p_nv_save_callback)(true, &list.asgn_range);
}
gatts_init_service_db(list.svc_db, svc_uuid, is_pri, s_hdl, num_handles);
VLOG(1) << __func__ << ": handles needed=" << num_handles
<< ", s_hdl=" << loghex(list.asgn_range.s_handle)
<< ", e_hdl=" << loghex(list.asgn_range.e_handle)
<< ", uuid=" << list.asgn_range.svc_uuid
<< ", is_primary=" << +list.asgn_range.is_primary;
service->attribute_handle = s_hdl;
btgatt_db_element_t* el = service + 1;
for (int i = 0; i < count - 1; i++, el++) {
const Uuid& uuid = el->uuid;
if (el->type == BTGATT_DB_CHARACTERISTIC) {
/* data validity checking */
if (((el->properties & GATT_CHAR_PROP_BIT_AUTH) &&
!(el->permissions & GATT_WRITE_SIGNED_PERM)) ||
((el->permissions & GATT_WRITE_SIGNED_PERM) &&
!(el->properties & GATT_CHAR_PROP_BIT_AUTH))) {
VLOG(1) << "Invalid configuration property=" << loghex(el->properties)
<< ", perm=" << loghex(el->permissions);
return GATT_INTERNAL_ERROR;
}
if (is_gatt_attr_type(uuid)) {
LOG(ERROR) << __func__
<< ": attept to add characteristic with UUID equal to GATT "
"Attribute Type "
<< uuid;
return GATT_INTERNAL_ERROR;
}
el->attribute_handle = gatts_add_characteristic(
list.svc_db, el->permissions, el->properties, uuid);
// add characteristic extended properties descriptor if needed
if (el->properties & GATT_CHAR_PROP_BIT_EXT_PROP) {
gatts_add_char_ext_prop_descr(list.svc_db, el->extended_properties);
}
} else if (el->type == BTGATT_DB_DESCRIPTOR) {
if (is_gatt_attr_type(uuid)) {
LOG(ERROR) << __func__
<< ": attept to add descriptor with UUID equal to GATT "
"Attribute Type "
<< uuid;
return GATT_INTERNAL_ERROR;
}
el->attribute_handle =
gatts_add_char_descr(list.svc_db, el->permissions, uuid);
} else if (el->type == BTGATT_DB_INCLUDED_SERVICE) {
tGATT_HDL_LIST_ELEM* p_incl_decl;
p_incl_decl = gatt_find_hdl_buffer_by_handle(el->attribute_handle);
if (p_incl_decl == nullptr) {
VLOG(1) << "Included Service not created";
return GATT_INTERNAL_ERROR;
}
el->attribute_handle = gatts_add_included_service(
list.svc_db, p_incl_decl->asgn_range.s_handle,
p_incl_decl->asgn_range.e_handle, p_incl_decl->asgn_range.svc_uuid);
}
}
LOG(INFO) << __func__ << ": service parsed correctly, now starting";
/*this is a new application service start */
// find a place for this service in the list
auto lst_ptr = gatt_cb.srv_list_info;
auto it = lst_ptr->begin();
for (; it != lst_ptr->end(); it++) {
if (list.asgn_range.s_handle < it->s_hdl) break;
}
auto rit = lst_ptr->emplace(it);
tGATT_SRV_LIST_ELEM& elem = *rit;
elem.gatt_if = gatt_if;
elem.s_hdl = list.asgn_range.s_handle;
elem.e_hdl = list.asgn_range.e_handle;
elem.p_db = &list.svc_db;
elem.is_primary = list.asgn_range.is_primary;
elem.app_uuid = list.asgn_range.app_uuid128;
elem.type = list.asgn_range.is_primary ? GATT_UUID_PRI_SERVICE
: GATT_UUID_SEC_SERVICE;
if (elem.type == GATT_UUID_PRI_SERVICE) {
Uuid* p_uuid = gatts_get_service_uuid(elem.p_db);
elem.sdp_handle = gatt_add_sdp_record(*p_uuid, elem.s_hdl, elem.e_hdl);
} else {
elem.sdp_handle = 0;
}
gatt_update_last_srv_info();
VLOG(1) << __func__ << ": allocated el s_hdl=" << loghex(elem.s_hdl)
<< ", e_hdl=" << loghex(elem.e_hdl) << ", type=" << loghex(elem.type)
<< ", sdp_hdl=" << loghex(elem.sdp_handle);
gatt_update_for_database_change();
gatt_proc_srv_chg();
return GATT_SERVICE_STARTED;
}
bool is_active_service(const Uuid& app_uuid128, Uuid* p_svc_uuid,
uint16_t start_handle) {
for (auto& info : *gatt_cb.srv_list_info) {
Uuid* p_this_uuid = gatts_get_service_uuid(info.p_db);
if (p_this_uuid && app_uuid128 == info.app_uuid &&
*p_svc_uuid == *p_this_uuid && (start_handle == info.s_hdl)) {
LOG(ERROR) << "Active Service Found: " << *p_svc_uuid;
return true;
}
}
return false;
}
/*******************************************************************************
*
* Function GATTS_DeleteService
*
* Description This function is called to delete a service.
*
* Parameter gatt_if : application interface
* p_svc_uuid : service UUID
* start_handle : start handle of the service
*
* Returns true if the operation succeeded, false if the handle block
* was not found.
*
******************************************************************************/
bool GATTS_DeleteService(tGATT_IF gatt_if, Uuid* p_svc_uuid,
uint16_t svc_inst) {
VLOG(1) << __func__;
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
if (p_reg == NULL) {
LOG(ERROR) << "Applicaiton not foud";
return false;
}
auto it =
gatt_find_hdl_buffer_by_app_id(p_reg->app_uuid128, p_svc_uuid, svc_inst);
if (it == gatt_cb.hdl_list_info->end()) {
LOG(ERROR) << "No Service found";
return false;
}
if (is_active_service(p_reg->app_uuid128, p_svc_uuid, svc_inst)) {
GATTS_StopService(it->asgn_range.s_handle);
}
gatt_update_for_database_change();
gatt_proc_srv_chg();
VLOG(1) << "released handles s_hdl=" << loghex(it->asgn_range.s_handle)
<< ", e_hdl=" << loghex(it->asgn_range.e_handle);
if ((it->asgn_range.s_handle >= gatt_cb.hdl_cfg.app_start_hdl) &&
gatt_cb.cb_info.p_nv_save_callback)
(*gatt_cb.cb_info.p_nv_save_callback)(false, &it->asgn_range);
gatt_cb.hdl_list_info->erase(it);
return true;
}
/*******************************************************************************
*
* Function GATTS_StopService
*
* Description This function is called to stop a service
*
* Parameter service_handle : this is the start handle of a service
*
* Returns None.
*
******************************************************************************/
void GATTS_StopService(uint16_t service_handle) {
LOG(INFO) << __func__ << ": service = " << loghex(service_handle);
auto it = gatt_sr_find_i_rcb_by_handle(service_handle);
if (it == gatt_cb.srv_list_info->end()) {
LOG(ERROR) << __func__ << ": service_handle=" << loghex(service_handle)
<< " is not in use";
return;
}
if (it->sdp_handle) {
SDP_DeleteRecord(it->sdp_handle);
}
gatt_cb.srv_list_info->erase(it);
gatt_update_last_srv_info();
}
/*******************************************************************************
*
* Function GATTs_HandleValueIndication
*
* Description This function sends a handle value indication to a client.
*
* Parameter conn_id: connection identifier.
* attr_handle: Attribute handle of this handle value
* indication.
* val_len: Length of the indicated attribute value.
* p_val: Pointer to the indicated attribute value data.
*
* Returns GATT_SUCCESS if sucessfully sent or queued; otherwise error
* code.
*
******************************************************************************/
tGATT_STATUS GATTS_HandleValueIndication(uint16_t conn_id, uint16_t attr_handle,
uint16_t val_len, uint8_t* p_val) {
tGATT_IF gatt_if = GATT_GET_GATT_IF(conn_id);
uint8_t tcb_idx = GATT_GET_TCB_IDX(conn_id);
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
tGATT_TCB* p_tcb = gatt_get_tcb_by_idx(tcb_idx);
VLOG(1) << __func__;
if ((p_reg == NULL) || (p_tcb == NULL)) {
LOG(ERROR) << __func__ << ": Unknown conn_id=" << loghex(conn_id);
return (tGATT_STATUS)GATT_INVALID_CONN_ID;
}
if (!GATT_HANDLE_IS_VALID(attr_handle)) return GATT_ILLEGAL_PARAMETER;
tGATT_VALUE indication;
indication.conn_id = conn_id;
indication.handle = attr_handle;
indication.len = val_len;
memcpy(indication.value, p_val, val_len);
indication.auth_req = GATT_AUTH_REQ_NONE;
uint16_t* indicate_handle_p = NULL;
uint16_t cid;
if (!gatt_tcb_get_cid_available_for_indication(p_tcb, p_reg->eatt_support,
&indicate_handle_p, &cid)) {
VLOG(1) << "Add a pending indication";
gatt_add_pending_ind(p_tcb, &indication);
return GATT_SUCCESS;
}
tGATT_SR_MSG gatt_sr_msg;
gatt_sr_msg.attr_value = indication;
BT_HDR* p_msg =
attp_build_sr_msg(*p_tcb, GATT_HANDLE_VALUE_IND, &gatt_sr_msg);
if (!p_msg) return GATT_NO_RESOURCES;
tGATT_STATUS cmd_status = attp_send_sr_msg(*p_tcb, cid, p_msg);
if (cmd_status == GATT_SUCCESS || cmd_status == GATT_CONGESTED) {
*indicate_handle_p = indication.handle;
gatt_start_conf_timer(p_tcb, cid);
}
return cmd_status;
}
/*******************************************************************************
*
* Function GATTS_HandleValueNotification
*
* Description This function sends a handle value notification to a client.
*
* Parameter conn_id: connection identifier.
* attr_handle: Attribute handle of this handle value
* indication.
* val_len: Length of the indicated attribute value.
* p_val: Pointer to the indicated attribute value data.
*
* Returns GATT_SUCCESS if sucessfully sent; otherwise error code.
*
******************************************************************************/
tGATT_STATUS GATTS_HandleValueNotification(uint16_t conn_id,
uint16_t attr_handle,
uint16_t val_len, uint8_t* p_val) {
tGATT_VALUE notif;
tGATT_IF gatt_if = GATT_GET_GATT_IF(conn_id);
uint8_t tcb_idx = GATT_GET_TCB_IDX(conn_id);
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
tGATT_TCB* p_tcb = gatt_get_tcb_by_idx(tcb_idx);
VLOG(1) << __func__;
if ((p_reg == NULL) || (p_tcb == NULL)) {
LOG(ERROR) << __func__ << "Unknown conn_id: " << conn_id;
return (tGATT_STATUS)GATT_INVALID_CONN_ID;
}
if (!GATT_HANDLE_IS_VALID(attr_handle)) {
return GATT_ILLEGAL_PARAMETER;
}
memset(¬if, 0, sizeof(notif));
notif.handle = attr_handle;
notif.len = val_len;
memcpy(notif.value, p_val, val_len);
notif.auth_req = GATT_AUTH_REQ_NONE;
tGATT_STATUS cmd_sent;
tGATT_SR_MSG gatt_sr_msg;
gatt_sr_msg.attr_value = notif;
uint16_t cid = gatt_tcb_get_att_cid(*p_tcb, p_reg->eatt_support);
BT_HDR* p_buf =
attp_build_sr_msg(*p_tcb, GATT_HANDLE_VALUE_NOTIF, &gatt_sr_msg);
if (p_buf != NULL) {
cmd_sent = attp_send_sr_msg(*p_tcb, cid, p_buf);
} else
cmd_sent = GATT_NO_RESOURCES;
return cmd_sent;
}
/*******************************************************************************
*
* Function GATTS_SendRsp
*
* Description This function sends the server response to client.
*
* Parameter conn_id: connection identifier.
* trans_id: transaction id
* status: response status
* p_msg: pointer to message parameters structure.
*
* Returns GATT_SUCCESS if sucessfully sent; otherwise error code.
*
******************************************************************************/
tGATT_STATUS GATTS_SendRsp(uint16_t conn_id, uint32_t trans_id,
tGATT_STATUS status, tGATTS_RSP* p_msg) {
tGATT_IF gatt_if = GATT_GET_GATT_IF(conn_id);
uint8_t tcb_idx = GATT_GET_TCB_IDX(conn_id);
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
tGATT_TCB* p_tcb = gatt_get_tcb_by_idx(tcb_idx);
VLOG(1) << __func__ << ": conn_id=" << loghex(conn_id)
<< ", trans_id=" << loghex(trans_id)
<< ", status=" << loghex(static_cast<uint8_t>(status));
if ((p_reg == NULL) || (p_tcb == NULL)) {
LOG(ERROR) << "Unknown conn_id=" << loghex(conn_id);
return (tGATT_STATUS)GATT_INVALID_CONN_ID;
}
tGATT_SR_CMD* sr_res_p = gatt_sr_get_cmd_by_trans_id(p_tcb, trans_id);
if (!sr_res_p) {
LOG(ERROR) << "conn_id=" << loghex(conn_id)
<< " waiting for other op_code ";
return (GATT_WRONG_STATE);
}
/* Process App response */
return gatt_sr_process_app_rsp(*p_tcb, gatt_if, trans_id, sr_res_p->op_code,
status, p_msg, sr_res_p);
}
/******************************************************************************/
/* GATT Profile Srvr Functions */
/******************************************************************************/
/******************************************************************************/
/* */
/* GATT CLIENT APIs */
/* */
/******************************************************************************/
/*******************************************************************************
*
* Function GATTC_ConfigureMTU
*
* Description This function is called to configure the ATT MTU size.
*
* Parameters conn_id: connection identifier.
* mtu - attribute MTU size..
*
* Returns GATT_SUCCESS if command started successfully.
*
******************************************************************************/
tGATT_STATUS GATTC_ConfigureMTU(uint16_t conn_id, uint16_t mtu) {
tGATT_IF gatt_if = GATT_GET_GATT_IF(conn_id);
uint8_t tcb_idx = GATT_GET_TCB_IDX(conn_id);
tGATT_TCB* p_tcb = gatt_get_tcb_by_idx(tcb_idx);
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
if ((p_tcb == NULL) || (p_reg == NULL) || (mtu < GATT_DEF_BLE_MTU_SIZE) ||
(mtu > GATT_MAX_MTU_SIZE)) {
LOG_WARN(
"Unable to configure ATT mtu size illegal parameter conn_id:%hu "
"mtu:%hu tcb:%s reg:%s",
conn_id, mtu, (p_tcb == nullptr) ? "BAD" : "ok",
(p_reg == nullptr) ? "BAD" : "ok");
return GATT_ILLEGAL_PARAMETER;
}
/* Validate that the link is BLE, not BR/EDR */
if (p_tcb->transport != BT_TRANSPORT_LE) {
return GATT_ERROR;
}
if (gatt_is_clcb_allocated(conn_id)) {
LOG_WARN("Connection is already used conn_id:%hu", conn_id);
return GATT_BUSY;
}
tGATT_CLCB* p_clcb = gatt_clcb_alloc(conn_id);
if (!p_clcb) {
LOG_WARN("Unable to allocate connection link control block");
return GATT_NO_RESOURCES;
}
/* For this request only ATT CID is valid */
p_clcb->cid = L2CAP_ATT_CID;
p_clcb->p_tcb->payload_size = mtu;
p_clcb->operation = GATTC_OPTYPE_CONFIG;
tGATT_CL_MSG gatt_cl_msg;
gatt_cl_msg.mtu = mtu;
LOG_DEBUG("Configuring ATT mtu size conn_id:%hu mtu:%hu", conn_id, mtu);
return attp_send_cl_msg(*p_clcb->p_tcb, p_clcb, GATT_REQ_MTU, &gatt_cl_msg);
}
/*******************************************************************************
*
* Function GATTC_Discover
*
* Description This function is called to do a discovery procedure on ATT
* server.
*
* Parameters conn_id: connection identifier.
* disc_type:discovery type.
* start_handle and end_handle: range of handles for discovery
* uuid: uuid to discovery. set to Uuid::kEmpty for requests
* that don't need it
*
* Returns GATT_SUCCESS if command received/sent successfully.
*
******************************************************************************/
tGATT_STATUS GATTC_Discover(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
uint16_t start_handle, uint16_t end_handle,
const Uuid& uuid) {
tGATT_IF gatt_if = GATT_GET_GATT_IF(conn_id);
uint8_t tcb_idx = GATT_GET_TCB_IDX(conn_id);
tGATT_TCB* p_tcb = gatt_get_tcb_by_idx(tcb_idx);
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
if ((p_tcb == NULL) || (p_reg == NULL) || (disc_type >= GATT_DISC_MAX)) {
LOG(ERROR) << __func__ << " Illegal param: disc_type=" << +disc_type
<< " conn_id=" << loghex(conn_id);
return GATT_ILLEGAL_PARAMETER;
}
if (!GATT_HANDLE_IS_VALID(start_handle) ||
!GATT_HANDLE_IS_VALID(end_handle) ||
/* search by type does not have a valid UUID param */
(disc_type == GATT_DISC_SRVC_BY_UUID && uuid.IsEmpty())) {
LOG(WARNING) << __func__ << " Illegal parameter conn_id=" << loghex(conn_id)
<< ", disc_type=" << +disc_type
<< ", s_handle=" << loghex(start_handle)
<< ", e_handle=" << loghex(end_handle);
return GATT_ILLEGAL_PARAMETER;
}
if (gatt_is_clcb_allocated(conn_id)) {
LOG(ERROR) << __func__ << "GATT_BUSY conn_id = " << +conn_id;
return GATT_BUSY;
}
tGATT_CLCB* p_clcb = gatt_clcb_alloc(conn_id);
if (!p_clcb) {
LOG(WARNING) << __func__ << " No resources conn_id=" << loghex(conn_id)
<< ", disc_type=" << +disc_type
<< ", s_handle=" << loghex(start_handle)
<< ", e_handle=" << loghex(end_handle);
return GATT_NO_RESOURCES;
}
p_clcb->operation = GATTC_OPTYPE_DISCOVERY;
p_clcb->op_subtype = disc_type;
p_clcb->s_handle = start_handle;
p_clcb->e_handle = end_handle;
p_clcb->uuid = uuid;
LOG(INFO) << __func__ << " conn_id=" << loghex(conn_id)
<< ", disc_type=" << +disc_type
<< ", s_handle=" << loghex(start_handle)
<< ", e_handle=" << loghex(end_handle);
gatt_act_discovery(p_clcb);
return GATT_SUCCESS;
}
tGATT_STATUS GATTC_Discover(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
uint16_t start_handle, uint16_t end_handle) {
return GATTC_Discover(conn_id, disc_type, start_handle, end_handle,
Uuid::kEmpty);
}
/*******************************************************************************
*
* Function GATTC_Read
*
* Description This function is called to read the value of an attribute
* from the server.
*
* Parameters conn_id: connection identifier.
* type - attribute read type.
* p_read - read operation parameters.
*
* Returns GATT_SUCCESS if command started successfully.
*
******************************************************************************/
tGATT_STATUS GATTC_Read(uint16_t conn_id, tGATT_READ_TYPE type,
tGATT_READ_PARAM* p_read) {
tGATT_IF gatt_if = GATT_GET_GATT_IF(conn_id);
uint8_t tcb_idx = GATT_GET_TCB_IDX(conn_id);
tGATT_TCB* p_tcb = gatt_get_tcb_by_idx(tcb_idx);
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
VLOG(1) << __func__ << ": conn_id=" << loghex(conn_id)
<< ", type=" << loghex(type);
if ((p_tcb == NULL) || (p_reg == NULL) || (p_read == NULL) ||
((type >= GATT_READ_MAX) || (type == 0))) {
LOG(ERROR) << ": illegal param: conn_id=" << loghex(conn_id)
<< "type=" << loghex(type);
return GATT_ILLEGAL_PARAMETER;
}
if (gatt_is_clcb_allocated(conn_id)) {
LOG(ERROR) << "GATT_BUSY conn_id=" << loghex(conn_id);
return GATT_BUSY;
}
tGATT_CLCB* p_clcb = gatt_clcb_alloc(conn_id);
if (!p_clcb) return GATT_NO_RESOURCES;
p_clcb->operation = GATTC_OPTYPE_READ;
p_clcb->op_subtype = type;
p_clcb->auth_req = p_read->by_handle.auth_req;
p_clcb->counter = 0;
p_clcb->read_req_current_mtu =
gatt_tcb_get_payload_size_tx(*p_tcb, p_clcb->cid);
switch (type) {
case GATT_READ_BY_TYPE:
case GATT_READ_CHAR_VALUE:
p_clcb->s_handle = p_read->service.s_handle;
p_clcb->e_handle = p_read->service.e_handle;
p_clcb->uuid = p_read->service.uuid;
break;
case GATT_READ_MULTIPLE: {
p_clcb->s_handle = 0;
/* copy multiple handles in CB */
tGATT_READ_MULTI* p_read_multi =
(tGATT_READ_MULTI*)osi_malloc(sizeof(tGATT_READ_MULTI));
p_clcb->p_attr_buf = (uint8_t*)p_read_multi;
memcpy(p_read_multi, &p_read->read_multiple, sizeof(tGATT_READ_MULTI));
break;
}
case GATT_READ_BY_HANDLE:
case GATT_READ_PARTIAL:
p_clcb->uuid = Uuid::kEmpty;
p_clcb->s_handle = p_read->by_handle.handle;
if (type == GATT_READ_PARTIAL) {
p_clcb->counter = p_read->partial.offset;
}
break;
default:
break;
}
/* start security check */
if (gatt_security_check_start(p_clcb)) p_tcb->pending_enc_clcb.push(p_clcb);
return GATT_SUCCESS;
}
/*******************************************************************************
*
* Function GATTC_Write
*
* Description This function is called to write the value of an attribute
* to the server.
*
* Parameters conn_id: connection identifier.
* type - attribute write type.
* p_write - write operation parameters.
*
* Returns GATT_SUCCESS if command started successfully.
*
******************************************************************************/
tGATT_STATUS GATTC_Write(uint16_t conn_id, tGATT_WRITE_TYPE type,
tGATT_VALUE* p_write) {
tGATT_IF gatt_if = GATT_GET_GATT_IF(conn_id);
uint8_t tcb_idx = GATT_GET_TCB_IDX(conn_id);
tGATT_TCB* p_tcb = gatt_get_tcb_by_idx(tcb_idx);
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
if ((p_tcb == NULL) || (p_reg == NULL) || (p_write == NULL) ||
((type != GATT_WRITE) && (type != GATT_WRITE_PREPARE) &&
(type != GATT_WRITE_NO_RSP))) {
LOG(ERROR) << __func__ << " Illegal param: conn_id=" << loghex(conn_id)
<< ", type=" << loghex(type);
return GATT_ILLEGAL_PARAMETER;
}
if (gatt_is_clcb_allocated(conn_id)) {
LOG(ERROR) << "GATT_BUSY conn_id=" << loghex(conn_id);
return GATT_BUSY;
}
tGATT_CLCB* p_clcb = gatt_clcb_alloc(conn_id);
if (!p_clcb) return GATT_NO_RESOURCES;
p_clcb->operation = GATTC_OPTYPE_WRITE;
p_clcb->op_subtype = type;
p_clcb->auth_req = p_write->auth_req;
p_clcb->p_attr_buf = (uint8_t*)osi_malloc(sizeof(tGATT_VALUE));
memcpy(p_clcb->p_attr_buf, (void*)p_write, sizeof(tGATT_VALUE));
tGATT_VALUE* p = (tGATT_VALUE*)p_clcb->p_attr_buf;
if (type == GATT_WRITE_PREPARE) {
p_clcb->start_offset = p_write->offset;
p->offset = 0;
}
if (gatt_security_check_start(p_clcb)) p_tcb->pending_enc_clcb.push(p_clcb);
return GATT_SUCCESS;
}
/*******************************************************************************
*
* Function GATTC_ExecuteWrite
*
* Description This function is called to send an Execute write request to
* the server.
*
* Parameters conn_id: connection identifier.
* is_execute - to execute or cancel the prepared write
* request(s)
*
* Returns GATT_SUCCESS if command started successfully.
*
******************************************************************************/
tGATT_STATUS GATTC_ExecuteWrite(uint16_t conn_id, bool is_execute) {
tGATT_IF gatt_if = GATT_GET_GATT_IF(conn_id);
uint8_t tcb_idx = GATT_GET_TCB_IDX(conn_id);
tGATT_TCB* p_tcb = gatt_get_tcb_by_idx(tcb_idx);
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
VLOG(1) << __func__ << ": conn_id=" << loghex(conn_id)
<< ", is_execute=" << +is_execute;
if ((p_tcb == NULL) || (p_reg == NULL)) {
LOG(ERROR) << " Illegal param: conn_id=" << loghex(conn_id);
return GATT_ILLEGAL_PARAMETER;
}
if (gatt_is_clcb_allocated(conn_id)) {
LOG(ERROR) << " GATT_BUSY conn_id=" << loghex(conn_id);
return GATT_BUSY;
}
tGATT_CLCB* p_clcb = gatt_clcb_alloc(conn_id);
if (!p_clcb) return GATT_NO_RESOURCES;
p_clcb->operation = GATTC_OPTYPE_EXE_WRITE;
tGATT_EXEC_FLAG flag =
is_execute ? GATT_PREP_WRITE_EXEC : GATT_PREP_WRITE_CANCEL;
gatt_send_queue_write_cancel(*p_clcb->p_tcb, p_clcb, flag);
return GATT_SUCCESS;
}
/*******************************************************************************
*
* Function GATTC_SendHandleValueConfirm
*
* Description This function is called to send a handle value confirmation
* as response to a handle value notification from server.
*
* Parameters conn_id: connection identifier.
* cid: channel id.
*
* Returns GATT_SUCCESS if command started successfully.
*
******************************************************************************/
tGATT_STATUS GATTC_SendHandleValueConfirm(uint16_t conn_id, uint16_t cid) {
VLOG(1) << __func__ << " conn_id=" << loghex(conn_id)
<< ", cid=" << loghex(cid);
tGATT_TCB* p_tcb = gatt_get_tcb_by_idx(GATT_GET_TCB_IDX(conn_id));
if (!p_tcb) {
LOG(ERROR) << "Unknown conn_id=" << loghex(conn_id);
return GATT_ILLEGAL_PARAMETER;
}
if (p_tcb->ind_count == 0) {
VLOG(1) << " conn_id: " << loghex(conn_id)
<< " ignored not waiting for indicaiton ack";
return GATT_SUCCESS;
}
gatt_stop_ind_ack_timer(p_tcb, cid);
VLOG(1) << "notif_count= " << p_tcb->ind_count;
/* send confirmation now */
tGATT_STATUS ret = attp_send_cl_confirmation_msg(*p_tcb, cid);
return ret;
}
/******************************************************************************/
/* */
/* GATT APIs */
/* */
/******************************************************************************/
/*******************************************************************************
*
* Function GATT_SetIdleTimeout
*
* Description This function (common to both client and server) sets the
* idle timeout for a tansport connection
*
* Parameter bd_addr: target device bd address.
* idle_tout: timeout value in seconds.
*
* Returns void
*
******************************************************************************/
void GATT_SetIdleTimeout(const RawAddress& bd_addr, uint16_t idle_tout,
tBT_TRANSPORT transport) {
bool status = false;
tGATT_TCB* p_tcb = gatt_find_tcb_by_addr(bd_addr, transport);
if (p_tcb != NULL) {
status = L2CA_SetLeGattTimeout(bd_addr, idle_tout);
if (idle_tout == GATT_LINK_IDLE_TIMEOUT_WHEN_NO_APP)
L2CA_SetIdleTimeoutByBdAddr(
p_tcb->peer_bda, GATT_LINK_IDLE_TIMEOUT_WHEN_NO_APP, BT_TRANSPORT_LE);
}
VLOG(1) << __func__ << " idle_tout=" << idle_tout << ", status=" << +status
<< " (1-OK 0-not performed)";
}
/*******************************************************************************
*
* Function GATT_Register
*
* Description This function is called to register an application
* with GATT
*
* Parameter p_app_uuid128: Application UUID
* p_cb_info: callback functions.
* eatt_support: indicate eatt support.
*
* Returns 0 for error, otherwise the index of the client registered
* with GATT
*
******************************************************************************/
tGATT_IF GATT_Register(const Uuid& app_uuid128, std::string name,
tGATT_CBACK* p_cb_info, bool eatt_support) {
tGATT_REG* p_reg;
uint8_t i_gatt_if = 0;
tGATT_IF gatt_if = 0;
for (i_gatt_if = 0, p_reg = gatt_cb.cl_rcb; i_gatt_if < GATT_MAX_APPS;
i_gatt_if++, p_reg++) {
if (p_reg->in_use && p_reg->app_uuid128 == app_uuid128) {
LOG(ERROR) << __func__ << ": Application already registered "
<< app_uuid128;
return 0;
}
}
for (i_gatt_if = 0, p_reg = gatt_cb.cl_rcb; i_gatt_if < GATT_MAX_APPS;
i_gatt_if++, p_reg++) {
if (!p_reg->in_use) {
*p_reg = {};
i_gatt_if++; /* one based number */
p_reg->app_uuid128 = app_uuid128;
gatt_if = p_reg->gatt_if = (tGATT_IF)i_gatt_if;
p_reg->app_cb = *p_cb_info;
p_reg->in_use = true;
p_reg->eatt_support = eatt_support;
p_reg->name = name;
LOG_INFO("Allocated name:%s uuid:%s gatt_if:%hhu eatt_support:%u",
name.c_str(), app_uuid128.ToString().c_str(), gatt_if,
eatt_support);
return gatt_if;
}
}
LOG(ERROR) << __func__
<< ": Unable to register GATT client, MAX client reached: "
<< GATT_MAX_APPS;
return 0;
}
/*******************************************************************************
*
* Function GATT_Deregister
*
* Description This function deregistered the application from GATT.
*
* Parameters gatt_if: applicaiton interface.
*
* Returns None.
*
******************************************************************************/
void GATT_Deregister(tGATT_IF gatt_if) {
LOG(INFO) << __func__ << " gatt_if=" << +gatt_if;
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
/* Index 0 is GAP and is never deregistered */
if ((gatt_if == 0) || (p_reg == NULL)) {
LOG(ERROR) << __func__
<< ": Unable to deregister client with invalid gatt_if="
<< +gatt_if;
return;
}
/* stop all services */
/* todo an applcaiton can not be deregistered if its services is also used by
other application
deregisteration need to bed performed in an orderly fashion
no check for now */
for (auto it = gatt_cb.srv_list_info->begin();
it != gatt_cb.srv_list_info->end();) {
if (it->gatt_if == gatt_if) {
GATTS_StopService(it++->s_hdl);
} else {
++it;
}
}
/* free all services db buffers if owned by this application */
gatt_free_srvc_db_buffer_app_id(p_reg->app_uuid128);
/* When an application deregisters, check remove the link associated with the
* app */
tGATT_TCB* p_tcb;
int i, j;
for (i = 0, p_tcb = gatt_cb.tcb; i < GATT_MAX_PHY_CHANNEL; i++, p_tcb++) {
if (!p_tcb->in_use) continue;
if (gatt_get_ch_state(p_tcb) != GATT_CH_CLOSE) {
gatt_update_app_use_link_flag(gatt_if, p_tcb, false, true);
}
tGATT_CLCB* p_clcb;
for (j = 0, p_clcb = &gatt_cb.clcb[j]; j < GATT_CL_MAX_LCB; j++, p_clcb++) {
if (p_clcb->in_use && (p_clcb->p_reg->gatt_if == gatt_if) &&
(p_clcb->p_tcb->tcb_idx == p_tcb->tcb_idx)) {
alarm_cancel(p_clcb->gatt_rsp_timer_ent);
gatt_clcb_dealloc(p_clcb);
break;
}
}
}
connection_manager::on_app_deregistered(gatt_if);
*p_reg = {};
}
/*******************************************************************************
*
* Function GATT_StartIf
*
* Description This function is called after registration to start
* receiving callbacks for registered interface. Function may
* call back with connection status and queued notifications
*
* Parameter gatt_if: applicaiton interface.
*
* Returns None.
*
******************************************************************************/
void GATT_StartIf(tGATT_IF gatt_if) {
tGATT_REG* p_reg;
tGATT_TCB* p_tcb;
RawAddress bda;
uint8_t start_idx, found_idx;
uint16_t conn_id;
tBT_TRANSPORT transport;
LOG_DEBUG("Starting GATT interface gatt_if_:%hu", gatt_if);
p_reg = gatt_get_regcb(gatt_if);
if (p_reg != NULL) {
start_idx = 0;
while (
gatt_find_the_connected_bda(start_idx, bda, &found_idx, &transport)) {
p_tcb = gatt_find_tcb_by_addr(bda, transport);
if (p_reg->app_cb.p_conn_cb && p_tcb) {
conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, gatt_if);
(*p_reg->app_cb.p_conn_cb)(gatt_if, bda, conn_id, true,
GATT_CONN_UNKNOWN, transport);
}
start_idx = ++found_idx;
}
}
}
/*******************************************************************************
*
* Function GATT_Connect
*
* Description This function initiate a connecttion to a remote device on
* GATT channel.
*
* Parameters gatt_if: applicaiton interface
* bd_addr: peer device address.
* is_direct: is a direct conenection or a background auto
* connection
*
* Returns true if connection started; false if connection start
* failure.
*
******************************************************************************/
bool GATT_Connect(tGATT_IF gatt_if, const RawAddress& bd_addr, bool is_direct,
tBT_TRANSPORT transport, bool opportunistic) {
uint8_t phy = controller_get_interface()->get_le_all_initiating_phys();
return GATT_Connect(gatt_if, bd_addr, is_direct, transport, opportunistic,
phy);
}
bool GATT_Connect(tGATT_IF gatt_if, const RawAddress& bd_addr, bool is_direct,
tBT_TRANSPORT transport, bool opportunistic,
uint8_t initiating_phys) {
/* Make sure app is registered */
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
if (!p_reg) {
LOG(ERROR) << __func__
<< ": Unable to find registered app gatt_if=" << +gatt_if;
return false;
}
if (!is_direct && transport != BT_TRANSPORT_LE) {
LOG(ERROR) << __func__
<< ": Unsupported transport for background connection gatt_if="
<< +gatt_if;
return false;
}
if (opportunistic) {
LOG(INFO) << __func__
<< ": Registered for opportunistic connection gatt_if="
<< +gatt_if;
return true;
}
bool ret;
if (is_direct) {
LOG_DEBUG("Starting direct connect gatt_if=%u address=%s", gatt_if,
bd_addr.ToString().c_str());
ret = gatt_act_connect(p_reg, bd_addr, transport, initiating_phys);
} else {
LOG_DEBUG("Starting background connect gatt_if=%u address=%s", gatt_if,
bd_addr.ToString().c_str());
if (!BTM_BackgroundConnectAddressKnown(bd_addr)) {
// RPA can rotate, causing address to "expire" in the background
// connection list. RPA is allowed for direct connect, as such request
// times out after 30 seconds
LOG(INFO) << __func__
<< ": Unable to add RPA to background connection gatt_if="
<< +gatt_if;
ret = true;
} else {
LOG_DEBUG("Adding to acceptlist device:%s", PRIVATE_ADDRESS(bd_addr));
ret = connection_manager::background_connect_add(gatt_if, bd_addr);
}
}
tGATT_TCB* p_tcb = gatt_find_tcb_by_addr(bd_addr, transport);
// background connections don't necessarily create tcb
if (p_tcb && ret)
gatt_update_app_use_link_flag(p_reg->gatt_if, p_tcb, true, !is_direct);
return ret;
}
/*******************************************************************************
*
* Function GATT_CancelConnect
*
* Description This function terminate the connection initaition to a
* remote device on GATT channel.
*
* Parameters gatt_if: client interface. If 0 used as unconditionally
* disconnect, typically used for direct connection
* cancellation.
* bd_addr: peer device address.
*
* Returns true if the connection started; false otherwise.
*
******************************************************************************/
bool GATT_CancelConnect(tGATT_IF gatt_if, const RawAddress& bd_addr,
bool is_direct) {
LOG(INFO) << __func__ << ": gatt_if:" << +gatt_if << ", address: " << bd_addr
<< ", direct:" << is_direct;
tGATT_REG* p_reg;
if (gatt_if) {
p_reg = gatt_get_regcb(gatt_if);
if (!p_reg) {
LOG(ERROR) << "gatt_if=" << +gatt_if << " is not registered";
return false;
}
if (is_direct)
return gatt_cancel_open(gatt_if, bd_addr);
else
return gatt_auto_connect_dev_remove(p_reg->gatt_if, bd_addr);
}
VLOG(1) << " unconditional";
/* only LE connection can be cancelled */
tGATT_TCB* p_tcb = gatt_find_tcb_by_addr(bd_addr, BT_TRANSPORT_LE);
if (p_tcb && !p_tcb->app_hold_link.empty()) {
for (auto it = p_tcb->app_hold_link.begin();
it != p_tcb->app_hold_link.end();) {
auto next = std::next(it);
// gatt_cancel_open modifies the app_hold_link.
gatt_cancel_open(*it, bd_addr);
it = next;
}
}
if (!connection_manager::remove_unconditional(bd_addr)) {
LOG(ERROR)
<< __func__
<< ": no app associated with the bg device for unconditional removal";
return false;
}
return true;
}
/*******************************************************************************
*
* Function GATT_Disconnect
*
* Description This function disconnects the GATT channel for this
* registered application.
*
* Parameters conn_id: connection identifier.
*
* Returns GATT_SUCCESS if disconnected.
*
******************************************************************************/
tGATT_STATUS GATT_Disconnect(uint16_t conn_id) {
LOG(INFO) << __func__ << " conn_id=" << loghex(conn_id);
uint8_t tcb_idx = GATT_GET_TCB_IDX(conn_id);
tGATT_TCB* p_tcb = gatt_get_tcb_by_idx(tcb_idx);
if (!p_tcb) return GATT_ILLEGAL_PARAMETER;
tGATT_IF gatt_if = GATT_GET_GATT_IF(conn_id);
gatt_update_app_use_link_flag(gatt_if, p_tcb, false, true);
return GATT_SUCCESS;
}
/*******************************************************************************
*
* Function GATT_GetConnectionInfor
*
* Description This function uses conn_id to find its associated BD address
* and application interface
*
* Parameters conn_id: connection id (input)
* p_gatt_if: applicaiton interface (output)
* bd_addr: peer device address. (output)
*
* Returns true the ligical link information is found for conn_id
*
******************************************************************************/
bool GATT_GetConnectionInfor(uint16_t conn_id, tGATT_IF* p_gatt_if,
RawAddress& bd_addr, tBT_TRANSPORT* p_transport) {
tGATT_IF gatt_if = GATT_GET_GATT_IF(conn_id);
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
uint8_t tcb_idx = GATT_GET_TCB_IDX(conn_id);
tGATT_TCB* p_tcb = gatt_get_tcb_by_idx(tcb_idx);
VLOG(1) << __func__ << " conn_id=" << loghex(conn_id);
if (!p_tcb || !p_reg) return false;
bd_addr = p_tcb->peer_bda;
*p_gatt_if = gatt_if;
*p_transport = p_tcb->transport;
return true;
}
/*******************************************************************************
*
* Function GATT_GetConnIdIfConnected
*
* Description This function find the conn_id if the logical link for BD
* address and applciation interface is connected
*
* Parameters gatt_if: applicaiton interface (input)
* bd_addr: peer device address. (input)
* p_conn_id: connection id (output)
* transport: transport option
*
* Returns true the logical link is connected
*
******************************************************************************/
bool GATT_GetConnIdIfConnected(tGATT_IF gatt_if, const RawAddress& bd_addr,
uint16_t* p_conn_id, tBT_TRANSPORT transport) {
tGATT_REG* p_reg = gatt_get_regcb(gatt_if);
tGATT_TCB* p_tcb = gatt_find_tcb_by_addr(bd_addr, transport);
bool status = false;
if (p_reg && p_tcb && (gatt_get_ch_state(p_tcb) == GATT_CH_OPEN)) {
*p_conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, gatt_if);
status = true;
}
VLOG(1) << __func__ << " status= " << +status;
return status;
}