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261 lines
8.7 KiB
261 lines
8.7 KiB
/*
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* Copyright 2019 The Android Open Source Project
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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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#include <android/hardware/bluetooth/1.0/types.h>
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#include <android/hardware/bluetooth/1.1/IBluetoothHci.h>
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#include <android/hardware/bluetooth/1.1/IBluetoothHciCallbacks.h>
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#include <stdlib.h>
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#include <future>
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#include <vector>
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#include "btaa/activity_attribution.h"
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#include "common/init_flags.h"
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#include "common/stop_watch.h"
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#include "common/strings.h"
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#include "hal/hci_hal.h"
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#include "hal/snoop_logger.h"
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#include "os/log.h"
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using ::android::hardware::hidl_vec;
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using ::android::hardware::Return;
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using ::android::hardware::Void;
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using ::android::hardware::bluetooth::V1_1::IBluetoothHci;
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using ::android::hardware::bluetooth::V1_1::IBluetoothHciCallbacks;
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using HidlStatus = ::android::hardware::bluetooth::V1_0::Status;
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using IBluetoothHci_1_0 = ::android::hardware::bluetooth::V1_0::IBluetoothHci;
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namespace bluetooth {
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namespace hal {
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namespace {
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class HciDeathRecipient : public ::android::hardware::hidl_death_recipient {
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public:
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virtual void serviceDied(uint64_t /*cookie*/, const android::wp<::android::hidl::base::V1_0::IBase>& /*who*/) {
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LOG_ERROR("Bluetooth HAL service died!");
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common::StopWatch::DumpStopWatchLog();
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abort();
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}
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};
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android::sp<HciDeathRecipient> hci_death_recipient_ = new HciDeathRecipient();
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template <class VecType>
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std::string GetTimerText(const char* func_name, VecType vec) {
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return common::StringFormat(
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"%s: len %zu, 1st 5 bytes '%s'",
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func_name,
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vec.size(),
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common::ToHexString(vec.begin(), std::min(vec.end(), vec.begin() + 5)).c_str());
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}
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class InternalHciCallbacks : public IBluetoothHciCallbacks {
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public:
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InternalHciCallbacks(activity_attribution::ActivityAttribution* btaa_logger_, SnoopLogger* btsnoop_logger)
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: btaa_logger_(btaa_logger_), btsnoop_logger_(btsnoop_logger) {
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init_promise_ = new std::promise<void>();
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}
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void SetCallback(HciHalCallbacks* callback) {
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ASSERT(callback_ == nullptr && callback != nullptr);
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callback_ = callback;
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}
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void ResetCallback() {
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callback_ = nullptr;
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}
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std::promise<void>* GetInitPromise() {
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return init_promise_;
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}
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Return<void> initializationComplete(HidlStatus status) {
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common::StopWatch(__func__);
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ASSERT(status == HidlStatus::SUCCESS);
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init_promise_->set_value();
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return Void();
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}
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Return<void> hciEventReceived(const hidl_vec<uint8_t>& event) override {
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common::StopWatch(GetTimerText(__func__, event));
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std::vector<uint8_t> received_hci_packet(event.begin(), event.end());
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btsnoop_logger_->Capture(received_hci_packet, SnoopLogger::Direction::INCOMING, SnoopLogger::PacketType::EVT);
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if (common::init_flags::btaa_hci_is_enabled()) {
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btaa_logger_->Capture(received_hci_packet, SnoopLogger::PacketType::EVT);
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}
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if (callback_ != nullptr) {
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callback_->hciEventReceived(std::move(received_hci_packet));
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}
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return Void();
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}
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Return<void> aclDataReceived(const hidl_vec<uint8_t>& data) override {
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common::StopWatch(GetTimerText(__func__, data));
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std::vector<uint8_t> received_hci_packet(data.begin(), data.end());
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btsnoop_logger_->Capture(received_hci_packet, SnoopLogger::Direction::INCOMING, SnoopLogger::PacketType::ACL);
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if (common::init_flags::btaa_hci_is_enabled()) {
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btaa_logger_->Capture(received_hci_packet, SnoopLogger::PacketType::ACL);
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}
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if (callback_ != nullptr) {
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callback_->aclDataReceived(std::move(received_hci_packet));
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}
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return Void();
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}
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Return<void> scoDataReceived(const hidl_vec<uint8_t>& data) override {
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common::StopWatch(GetTimerText(__func__, data));
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std::vector<uint8_t> received_hci_packet(data.begin(), data.end());
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btsnoop_logger_->Capture(received_hci_packet, SnoopLogger::Direction::INCOMING, SnoopLogger::PacketType::SCO);
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if (common::init_flags::btaa_hci_is_enabled()) {
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btaa_logger_->Capture(received_hci_packet, SnoopLogger::PacketType::SCO);
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}
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if (callback_ != nullptr) {
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callback_->scoDataReceived(std::move(received_hci_packet));
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}
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return Void();
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}
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Return<void> isoDataReceived(const hidl_vec<uint8_t>& data) override {
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common::StopWatch(GetTimerText(__func__, data));
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std::vector<uint8_t> received_hci_packet(data.begin(), data.end());
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btsnoop_logger_->Capture(received_hci_packet, SnoopLogger::Direction::INCOMING, SnoopLogger::PacketType::ISO);
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if (callback_ != nullptr) {
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callback_->isoDataReceived(std::move(received_hci_packet));
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}
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return Void();
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}
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private:
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std::promise<void>* init_promise_ = nullptr;
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HciHalCallbacks* callback_ = nullptr;
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activity_attribution::ActivityAttribution* btaa_logger_ = nullptr;
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SnoopLogger* btsnoop_logger_ = nullptr;
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};
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} // namespace
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class HciHalHidl : public HciHal {
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public:
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void registerIncomingPacketCallback(HciHalCallbacks* callback) override {
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callbacks_->SetCallback(callback);
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}
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void unregisterIncomingPacketCallback() override {
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callbacks_->ResetCallback();
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}
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void sendHciCommand(HciPacket command) override {
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btsnoop_logger_->Capture(command, SnoopLogger::Direction::OUTGOING, SnoopLogger::PacketType::CMD);
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if (common::init_flags::btaa_hci_is_enabled()) {
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btaa_logger_->Capture(command, SnoopLogger::PacketType::CMD);
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}
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bt_hci_->sendHciCommand(command);
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}
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void sendAclData(HciPacket packet) override {
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btsnoop_logger_->Capture(packet, SnoopLogger::Direction::OUTGOING, SnoopLogger::PacketType::ACL);
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if (common::init_flags::btaa_hci_is_enabled()) {
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btaa_logger_->Capture(packet, SnoopLogger::PacketType::ACL);
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}
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bt_hci_->sendAclData(packet);
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}
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void sendScoData(HciPacket packet) override {
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btsnoop_logger_->Capture(packet, SnoopLogger::Direction::OUTGOING, SnoopLogger::PacketType::SCO);
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if (common::init_flags::btaa_hci_is_enabled()) {
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btaa_logger_->Capture(packet, SnoopLogger::PacketType::SCO);
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}
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bt_hci_->sendScoData(packet);
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}
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void sendIsoData(HciPacket packet) override {
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if (bt_hci_1_1_ == nullptr) {
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LOG_ERROR("ISO is not supported in HAL v1.0");
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return;
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}
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btsnoop_logger_->Capture(packet, SnoopLogger::Direction::OUTGOING, SnoopLogger::PacketType::ISO);
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bt_hci_1_1_->sendIsoData(packet);
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}
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protected:
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void ListDependencies(ModuleList* list) override {
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list->add<SnoopLogger>();
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if (common::init_flags::btaa_hci_is_enabled()) {
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list->add<activity_attribution::ActivityAttribution>();
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}
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}
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void Start() override {
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if (common::init_flags::btaa_hci_is_enabled()) {
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btaa_logger_ = GetDependency<activity_attribution::ActivityAttribution>();
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}
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btsnoop_logger_ = GetDependency<SnoopLogger>();
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bt_hci_1_1_ = IBluetoothHci::getService();
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if (bt_hci_1_1_ != nullptr) {
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bt_hci_ = bt_hci_1_1_;
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} else {
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bt_hci_ = IBluetoothHci_1_0::getService();
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}
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ASSERT(bt_hci_ != nullptr);
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auto death_link = bt_hci_->linkToDeath(hci_death_recipient_, 0);
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ASSERT_LOG(death_link.isOk(), "Unable to set the death recipient for the Bluetooth HAL");
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// Block allows allocation of a variable that might be bypassed by goto.
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{
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callbacks_ = new InternalHciCallbacks(btaa_logger_, btsnoop_logger_);
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if (bt_hci_1_1_ != nullptr) {
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bt_hci_1_1_->initialize_1_1(callbacks_);
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} else {
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bt_hci_->initialize(callbacks_);
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}
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// Don't timeout here, time out at a higher layer
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callbacks_->GetInitPromise()->get_future().wait();
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}
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}
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void Stop() override {
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ASSERT(bt_hci_ != nullptr);
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auto death_unlink = bt_hci_->unlinkToDeath(hci_death_recipient_);
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if (!death_unlink.isOk()) {
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LOG_ERROR("Error unlinking death recipient from the Bluetooth HAL");
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}
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bt_hci_->close();
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callbacks_->ResetCallback();
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bt_hci_ = nullptr;
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bt_hci_1_1_ = nullptr;
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}
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std::string ToString() const override {
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return std::string("HciHalHidl");
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}
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private:
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android::sp<InternalHciCallbacks> callbacks_;
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android::sp<IBluetoothHci_1_0> bt_hci_;
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android::sp<IBluetoothHci> bt_hci_1_1_;
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activity_attribution::ActivityAttribution* btaa_logger_;
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SnoopLogger* btsnoop_logger_;
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};
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const ModuleFactory HciHal::Factory = ModuleFactory([]() { return new HciHalHidl(); });
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} // namespace hal
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} // namespace bluetooth
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