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-rw-r--r--bta/vc/device.cc245
1 files changed, 0 insertions, 245 deletions
diff --git a/bta/vc/device.cc b/bta/vc/device.cc
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index 9e059e781..000000000
--- a/bta/vc/device.cc
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-/*
- * Copyright 2020 HIMSA II K/S - www.himsa.com.
- * Represented by EHIMA - www.ehima.com
- *
- * 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.
- */
-
-#include <map>
-#include <vector>
-
-#include "bta_gatt_api.h"
-#include "bta_gatt_queue.h"
-#include "devices.h"
-#include "gatt_api.h"
-#include "stack/btm/btm_sec.h"
-
-using namespace bluetooth::vc::internal;
-
-void VolumeControlDevice::Disconnect(tGATT_IF gatt_if) {
- LOG(INFO) << __func__ << ": " << this->ToString();
-
- if (IsConnected()) {
- if (volume_state_handle != 0)
- BTA_GATTC_DeregisterForNotifications(gatt_if, address,
- volume_state_handle);
-
- if (volume_flags_handle != 0)
- BTA_GATTC_DeregisterForNotifications(gatt_if, address,
- volume_flags_handle);
-
- BtaGattQueue::Clean(connection_id);
- BTA_GATTC_Close(connection_id);
- connection_id = GATT_INVALID_CONN_ID;
- } else {
- BTA_GATTC_CancelOpen(gatt_if, address, false);
- }
-
- device_ready = false;
- handles_pending.clear();
-}
-
-/*
- * Find the handle for the client characteristics configuration of a given
- * characteristics
- */
-uint16_t VolumeControlDevice::find_ccc_handle(uint16_t chrc_handle) {
- const gatt::Characteristic* p_char =
- BTA_GATTC_GetCharacteristic(connection_id, chrc_handle);
- if (!p_char) {
- LOG(WARNING) << __func__ << ": no such handle=" << loghex(chrc_handle);
- return 0;
- }
-
- for (const gatt::Descriptor& desc : p_char->descriptors) {
- if (desc.uuid == Uuid::From16Bit(GATT_UUID_CHAR_CLIENT_CONFIG))
- return desc.handle;
- }
-
- return 0;
-}
-
-bool VolumeControlDevice::set_volume_control_service_handles(
- const gatt::Service& service) {
- uint16_t state_handle = 0, state_ccc_handle = 0, control_point_handle = 0,
- flags_handle = 0, flags_ccc_handle = 0;
-
- for (const gatt::Characteristic& chrc : service.characteristics) {
- if (chrc.uuid == kVolumeControlStateUuid) {
- state_handle = chrc.value_handle;
- state_ccc_handle = find_ccc_handle(chrc.value_handle);
- } else if (chrc.uuid == kVolumeControlPointUuid) {
- control_point_handle = chrc.value_handle;
- } else if (chrc.uuid == kVolumeFlagsUuid) {
- flags_handle = chrc.value_handle;
- flags_ccc_handle = find_ccc_handle(chrc.value_handle);
- } else {
- LOG(WARNING) << __func__ << ": unknown characteristic=" << chrc.uuid;
- }
- }
-
- // Validate service handles
- if (GATT_HANDLE_IS_VALID(state_handle) &&
- GATT_HANDLE_IS_VALID(state_ccc_handle) &&
- GATT_HANDLE_IS_VALID(control_point_handle) &&
- GATT_HANDLE_IS_VALID(flags_handle)
- /* volume_flags_ccc_handle is optional */) {
- volume_state_handle = state_handle;
- volume_state_ccc_handle = state_ccc_handle;
- volume_control_point_handle = control_point_handle;
- volume_flags_handle = flags_handle;
- volume_flags_ccc_handle = flags_ccc_handle;
- return true;
- }
-
- return false;
-}
-
-bool VolumeControlDevice::UpdateHandles(void) {
- ResetHandles();
-
- bool vcs_found = false;
- const std::list<gatt::Service>* services =
- BTA_GATTC_GetServices(connection_id);
- if (services == nullptr) {
- LOG(ERROR) << "No services found";
- return false;
- }
-
- for (auto const& service : *services) {
- if (service.uuid == kVolumeControlUuid) {
- LOG(INFO) << "Found VCS, handle=" << loghex(service.handle);
- vcs_found = set_volume_control_service_handles(service);
- if (!vcs_found) break;
- }
- }
-
- return vcs_found;
-}
-
-void VolumeControlDevice::ResetHandles(void) {
- device_ready = false;
-
- // the handles are not valid, so discard pending GATT operations
- BtaGattQueue::Clean(connection_id);
-
- volume_state_handle = 0;
- volume_state_ccc_handle = 0;
- volume_control_point_handle = 0;
- volume_flags_handle = 0;
- volume_flags_ccc_handle = 0;
-}
-
-void VolumeControlDevice::ControlPointOperation(uint8_t opcode,
- const std::vector<uint8_t>* arg,
- GATT_WRITE_OP_CB cb,
- void* cb_data) {
- std::vector<uint8_t> set_value({opcode, change_counter});
- if (arg != nullptr)
- set_value.insert(set_value.end(), (*arg).begin(), (*arg).end());
-
- BtaGattQueue::WriteCharacteristic(connection_id, volume_control_point_handle,
- set_value, GATT_WRITE, cb, cb_data);
-}
-
-bool VolumeControlDevice::subscribe_for_notifications(tGATT_IF gatt_if,
- uint16_t handle,
- uint16_t ccc_handle,
- GATT_WRITE_OP_CB cb) {
- tGATT_STATUS status =
- BTA_GATTC_RegisterForNotifications(gatt_if, address, handle);
- if (status != GATT_SUCCESS) {
- LOG(ERROR) << __func__ << ": failed, status=" << loghex(+status);
- return false;
- }
-
- std::vector<uint8_t> value(2);
- uint8_t* ptr = value.data();
- UINT16_TO_STREAM(ptr, GATT_CHAR_CLIENT_CONFIG_NOTIFICATION);
- BtaGattQueue::WriteDescriptor(connection_id, ccc_handle, std::move(value),
- GATT_WRITE, cb, nullptr);
-
- return true;
-}
-
-/**
- * Enqueue GATT requests that are required by the Volume Control to be
- * functional. This includes State characteristics read and subscription.
- * Those characteristics contain the change counter needed to send any request
- * via Control Point. Once completed successfully, the device can be stored
- * and reported as connected. In each case we subscribe first to be sure we do
- * not miss any value change.
- */
-bool VolumeControlDevice::EnqueueInitialRequests(
- tGATT_IF gatt_if, GATT_READ_OP_CB chrc_read_cb,
- GATT_WRITE_OP_CB cccd_write_cb) {
- handles_pending.clear();
- handles_pending.insert(volume_state_handle);
- handles_pending.insert(volume_state_ccc_handle);
- if (!subscribe_for_notifications(gatt_if, volume_state_handle,
- volume_state_ccc_handle, cccd_write_cb)) {
- return false;
- }
-
- BtaGattQueue::ReadCharacteristic(connection_id, volume_state_handle,
- chrc_read_cb, nullptr);
-
- return true;
-}
-
-/**
- * Enqueue the remaining requests. Those are not so crucial and can be done
- * once Volume Control instance indicates it's readiness to profile.
- * This includes characteristics read and subscription.
- * In each case we subscribe first to be sure we do not miss any value change.
- */
-void VolumeControlDevice::EnqueueRemainingRequests(
- tGATT_IF gatt_if, GATT_READ_OP_CB chrc_read_cb,
- GATT_WRITE_OP_CB cccd_write_cb) {
- std::map<uint16_t, uint16_t> handle_pairs{
- {volume_flags_handle, volume_flags_ccc_handle},
- };
-
- for (auto const& handles : handle_pairs) {
- if (GATT_HANDLE_IS_VALID(handles.second)) {
- subscribe_for_notifications(gatt_if, handles.first, handles.second,
- cccd_write_cb);
- }
-
- BtaGattQueue::ReadCharacteristic(connection_id, handles.first, chrc_read_cb,
- nullptr);
- }
-}
-
-bool VolumeControlDevice::VerifyReady(uint16_t handle) {
- handles_pending.erase(handle);
- device_ready = handles_pending.size() == 0;
- return device_ready;
-}
-
-bool VolumeControlDevice::IsEncryptionEnabled() {
- uint8_t sec_flag = 0;
- bool device_found =
- BTM_GetSecurityFlagsByTransport(address, &sec_flag, BT_TRANSPORT_LE);
- LOG(INFO) << __func__ << ": found=" << static_cast<int>(device_found)
- << " sec_flag=" << loghex(sec_flag);
- return device_found && (sec_flag & BTM_SEC_FLAG_ENCRYPTED);
-}
-
-bool VolumeControlDevice::EnableEncryption(tBTM_SEC_CALLBACK* callback) {
- int result = BTM_SetEncryption(address, BT_TRANSPORT_LE, callback, nullptr,
- BTM_BLE_SEC_ENCRYPT);
- LOG(INFO) << __func__ << ": result=" << +result;
- // TODO: should we care about the result??
- return true;
-}
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