system/gd/hci/facade/le_acl_manager_facade.cc - platform/packages/modules/Bluetooth - Git at Google

 /*
  * Copyright 2019 The Android Open Source Project
  *
  * 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 "hci/facade/le_acl_manager_facade.h"

 #include <condition_variable>
 #include <memory>
 #include <mutex>

 #include "blueberry/facade/hci/le_acl_manager_facade.grpc.pb.h"
 #include "blueberry/facade/hci/le_acl_manager_facade.pb.h"
 #include "common/bind.h"
 #include "grpc/grpc_event_queue.h"
 #include "hci/acl_manager.h"
 #include "hci/hci_packets.h"
 #include "packet/raw_builder.h"

 using ::grpc::ServerAsyncResponseWriter;
 using ::grpc::ServerAsyncWriter;
 using ::grpc::ServerContext;

 using ::bluetooth::packet::RawBuilder;

 namespace bluetooth {
 namespace hci {
 namespace facade {

 using acl_manager::LeAclConnection;
 using acl_manager::LeConnectionCallbacks;
 using acl_manager::LeConnectionManagementCallbacks;

 using namespace blueberry::facade::hci;

 class LeAclManagerFacadeService : public LeAclManagerFacade::Service, public LeConnectionCallbacks {
  public:
   LeAclManagerFacadeService(AclManager* acl_manager, ::bluetooth::os::Handler* facade_handler)
       : acl_manager_(acl_manager), facade_handler_(facade_handler) {
     acl_manager_->RegisterLeCallbacks(this, facade_handler_);
   }

   ~LeAclManagerFacadeService() {
     std::unique_lock<std::mutex> lock(acl_connections_mutex_);
     for (auto& conn : acl_connections_) {
       if (conn.second.connection_ != nullptr) {
         conn.second.connection_->GetAclQueueEnd()->UnregisterDequeue();
         conn.second.connection_.reset();
       }
     }
   }

   ::grpc::Status CreateConnection(
       ::grpc::ServerContext* context,
       const CreateConnectionMsg* request,
       ::grpc::ServerWriter<LeConnectionEvent>* writer) override {
     Address peer_address;
     ASSERT(Address::FromString(request->peer_address().address().address(), peer_address));
     AddressWithType peer(peer_address, static_cast<AddressType>(request->peer_address().type()));
     bool is_direct = request->is_direct();
     acl_manager_->CreateLeConnection(peer, is_direct);

     if (is_direct) {
       if (direct_connection_events_ != nullptr) {
         return ::grpc::Status(
             ::grpc::StatusCode::RESOURCE_EXHAUSTED, "Only one outstanding direct request is supported");
       }
       direct_connection_events_ = std::make_shared<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>>(
           std::string("direct connection attempt ") + peer.ToString());
       direct_connection_address_ = peer;
       return direct_connection_events_->RunLoop(context, writer);
     }
     per_connection_events_.emplace(
         peer,
         std::make_unique<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>>(
             std::string("connection attempt ") + peer.ToString()));
     return per_connection_events_[peer]->RunLoop(context, writer);
   }

   ::grpc::Status CancelConnection(
       ::grpc::ServerContext* context,
       const ::blueberry::facade::BluetoothAddressWithType* request,
       google::protobuf::Empty* response) override {
     Address peer_address;
     ASSERT(Address::FromString(request->address().address(), peer_address));
     AddressWithType peer(peer_address, static_cast<AddressType>(request->type()));
     if (peer == direct_connection_address_) {
       direct_connection_address_ = AddressWithType();
       direct_connection_events_.reset();
     } else {
       if (per_connection_events_.count(peer) == 0) {
         return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "No matching outstanding connection");
       }
     }
     acl_manager_->CancelLeConnect(peer);
     return ::grpc::Status::OK;
   }

   ::grpc::Status Disconnect(::grpc::ServerContext* context, const LeHandleMsg* request,
                             ::google::protobuf::Empty* response) override {
     std::unique_lock<std::mutex> lock(acl_connections_mutex_);
     auto connection = acl_connections_.find(request->handle());
     if (connection == acl_connections_.end()) {
       LOG_ERROR("Invalid handle");
       return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid handle");
     } else {
       connection->second.connection_->Disconnect(DisconnectReason::REMOTE_USER_TERMINATED_CONNECTION);
       return ::grpc::Status::OK;
     }
   }

 #define GET_CONNECTION(view)                                                         \
   std::map<uint16_t, Connection>::iterator connection;                               \
   do {                                                                               \
     if (!view.IsValid()) {                                                           \
       return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid handle"); \
     }                                                                                \
     std::unique_lock<std::mutex> lock(acl_connections_mutex_);                       \
     connection = acl_connections_.find(view.GetConnectionHandle());                  \
     if (connection == acl_connections_.end()) {                                      \
       return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid handle"); \
     }                                                                                \
   } while (0)

   ::grpc::Status ConnectionCommand(
       ::grpc::ServerContext* context,
       const LeConnectionCommandMsg* request,
       ::google::protobuf::Empty* response) override {
     auto command_view =
         ConnectionManagementCommandView::Create(AclCommandView::Create(CommandView::Create(PacketView<kLittleEndian>(
             std::make_shared<std::vector<uint8_t>>(request->packet().begin(), request->packet().end())))));
     if (!command_view.IsValid()) {
       return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid command packet");
     }
     switch (command_view.GetOpCode()) {
       case OpCode::DISCONNECT: {
         auto view = DisconnectView::Create(command_view);
         GET_CONNECTION(view);
         connection->second.connection_->Disconnect(view.GetReason());
         return ::grpc::Status::OK;
       }
       default:
         return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid command packet");
     }
   }
 #undef GET_CONNECTION

   ::grpc::Status FetchIncomingConnection(
       ::grpc::ServerContext* context,
       const google::protobuf::Empty* request,
       ::grpc::ServerWriter<LeConnectionEvent>* writer) override {
     if (incoming_connection_events_ != nullptr) {
       return ::grpc::Status(
           ::grpc::StatusCode::RESOURCE_EXHAUSTED, "Only one outstanding incoming connection is supported");
     }
     incoming_connection_events_ =
         std::make_unique<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>>(std::string("incoming connection "));
     return incoming_connection_events_->RunLoop(context, writer);
   }

   ::grpc::Status AddDeviceToResolvingList(
       ::grpc::ServerContext* context, const IrkMsg* request, ::google::protobuf::Empty* response) override {
     Address peer_address;
     ASSERT(Address::FromString(request->peer().address().address(), peer_address));
     AddressWithType peer(peer_address, static_cast<AddressType>(request->peer().type()));

     auto request_peer_irk_length = request->peer_irk().end() - request->peer_irk().begin();

     if (request_peer_irk_length != crypto_toolbox::OCTET16_LEN) {
       return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid Peer IRK");
     }

     auto request_local_irk_length = request->local_irk().end() - request->local_irk().begin();
     if (request_local_irk_length != crypto_toolbox::OCTET16_LEN) {
       return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid Local IRK");
     }

     crypto_toolbox::Octet16 peer_irk = {};
     crypto_toolbox::Octet16 local_irk = {};

     std::vector<uint8_t> peer_irk_data(request->peer_irk().begin(), request->peer_irk().end());
     std::copy_n(peer_irk_data.begin(), crypto_toolbox::OCTET16_LEN, peer_irk.begin());

     std::vector<uint8_t> local_irk_data(request->local_irk().begin(), request->local_irk().end());
     std::copy_n(local_irk_data.begin(), crypto_toolbox::OCTET16_LEN, local_irk.begin());

     acl_manager_->AddDeviceToResolvingList(peer, peer_irk, local_irk);
     return ::grpc::Status::OK;
   }

   ::grpc::Status SendAclData(
       ::grpc::ServerContext* context, const LeAclData* request, ::google::protobuf::Empty* response) override {
     std::promise<void> promise;
     auto future = promise.get_future();
     {
       std::unique_lock<std::mutex> lock(acl_connections_mutex_);
       auto connection = acl_connections_.find(request->handle());
       if (connection == acl_connections_.end()) {
         return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid handle");
       }
       connection->second.connection_->GetAclQueueEnd()->RegisterEnqueue(
           facade_handler_,
           common::Bind(
               &LeAclManagerFacadeService::enqueue_packet,
               common::Unretained(this),
               common::Unretained(request),
               common::Passed(std::move(promise))));
       auto status = future.wait_for(std::chrono::milliseconds(1000));
       if (status != std::future_status::ready) {
         return ::grpc::Status(::grpc::StatusCode::RESOURCE_EXHAUSTED, "Can't send packet");
       }
     }
     return ::grpc::Status::OK;
   }

   std::unique_ptr<BasePacketBuilder> enqueue_packet(const LeAclData* request, std::promise<void> promise) {
     auto connection = acl_connections_.find(request->handle());
     ASSERT_LOG(connection != acl_connections_.end(), "handle %d", request->handle());
     connection->second.connection_->GetAclQueueEnd()->UnregisterEnqueue();
     std::unique_ptr<RawBuilder> packet =
         std::make_unique<RawBuilder>(std::vector<uint8_t>(request->payload().begin(), request->payload().end()));
     promise.set_value();
     return packet;
   }

   ::grpc::Status FetchAclData(
       ::grpc::ServerContext* context, const LeHandleMsg* request, ::grpc::ServerWriter<LeAclData>* writer) override {
     auto connection = acl_connections_.find(request->handle());
     if (connection == acl_connections_.end()) {
       return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid handle");
     }
     return connection->second.pending_acl_data_.RunLoop(context, writer);
   }

   static inline std::string builder_to_string(std::unique_ptr<BasePacketBuilder> builder) {
     std::vector<uint8_t> bytes;
     BitInserter bit_inserter(bytes);
     builder->Serialize(bit_inserter);
     return std::string(bytes.begin(), bytes.end());
   }

   void on_incoming_acl(std::shared_ptr<LeAclConnection> connection, uint16_t handle) {
     auto packet = connection->GetAclQueueEnd()->TryDequeue();
     auto connection_tracker = acl_connections_.find(handle);
     ASSERT_LOG(connection_tracker != acl_connections_.end(), "handle %d", handle);
     LeAclData acl_data;
     acl_data.set_handle(handle);
     acl_data.set_payload(std::string(packet->begin(), packet->end()));
     connection_tracker->second.pending_acl_data_.OnIncomingEvent(acl_data);
   }

   void OnLeConnectSuccess(AddressWithType peer, std::unique_ptr<LeAclConnection> connection) override {
     LOG_INFO("%s", peer.ToString().c_str());

     std::unique_lock<std::mutex> lock(acl_connections_mutex_);
     std::shared_ptr<LeAclConnection> shared_connection = std::move(connection);
     uint16_t handle = shared_connection->GetHandle();
     auto role = shared_connection->GetRole();
     if (role == Role::PERIPHERAL) {
       ASSERT(incoming_connection_events_ != nullptr);
       per_connection_events_.emplace(peer, incoming_connection_events_);
       incoming_connection_events_.reset();
     } else if (direct_connection_address_ == peer) {
       direct_connection_address_ = AddressWithType();
       per_connection_events_.emplace(peer, direct_connection_events_);
       direct_connection_events_.reset();
     }
     acl_connections_.emplace(
         std::piecewise_construct,
         std::forward_as_tuple(handle),
         std::forward_as_tuple(handle, shared_connection, per_connection_events_[peer]));
     shared_connection->GetAclQueueEnd()->RegisterDequeue(
         facade_handler_,
         common::Bind(&LeAclManagerFacadeService::on_incoming_acl, common::Unretained(this), shared_connection, handle));
     auto callbacks = acl_connections_.find(handle)->second.GetCallbacks();
     shared_connection->RegisterCallbacks(callbacks, facade_handler_);
     {
       std::unique_ptr<BasePacketBuilder> builder = LeConnectionCompleteBuilder::Create(
           ErrorCode::SUCCESS, handle, role, peer.GetAddressType(), peer.GetAddress(), 1, 2, 3, ClockAccuracy::PPM_20);
       LeConnectionEvent success;
       success.set_payload(builder_to_string(std::move(builder)));
       per_connection_events_[peer]->OnIncomingEvent(success);
     }
   }

   void OnLeConnectFail(AddressWithType address, ErrorCode reason) override {
     std::unique_ptr<BasePacketBuilder> builder = LeConnectionCompleteBuilder::Create(
         reason, 0, Role::CENTRAL, address.GetAddressType(), address.GetAddress(), 0, 0, 0, ClockAccuracy::PPM_20);
     LeConnectionEvent fail;
     fail.set_payload(builder_to_string(std::move(builder)));
     if (address == direct_connection_address_) {
       direct_connection_address_ = AddressWithType();
       direct_connection_events_->OnIncomingEvent(fail);
     } else {
       per_connection_events_[address]->OnIncomingEvent(fail);
     }
   }

   class Connection : public LeConnectionManagementCallbacks {
    public:
     Connection(
         uint16_t handle,
         std::shared_ptr<LeAclConnection> connection,
         std::shared_ptr<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>> event_stream)
         : handle_(handle), connection_(std::move(connection)), event_stream_(std::move(event_stream)) {}
     void OnConnectionUpdate(
         hci::ErrorCode hci_status,
         uint16_t connection_interval,
         uint16_t connection_latency,
         uint16_t supervision_timeout) override {
       LOG_INFO(
           "interval: 0x%hx, latency: 0x%hx, timeout 0x%hx",
           connection_interval,
           connection_latency,
           supervision_timeout);
     }

     void OnDataLengthChange(uint16_t tx_octets, uint16_t tx_time, uint16_t rx_octets, uint16_t rx_time) override {
       LOG_INFO(
           "tx_octets: 0x%hx, tx_time: 0x%hx, rx_octets 0x%hx, rx_time 0x%hx", tx_octets, tx_time, rx_octets, rx_time);
     }

     void OnPhyUpdate(hci::ErrorCode hci_status, uint8_t tx_phy, uint8_t rx_phy) override {}
     void OnLocalAddressUpdate(AddressWithType address_with_type) override {}
     void OnDisconnection(ErrorCode reason) override {
       std::unique_ptr<BasePacketBuilder> builder =
           DisconnectionCompleteBuilder::Create(ErrorCode::SUCCESS, handle_, reason);
       LeConnectionEvent disconnection;
       disconnection.set_payload(builder_to_string(std::move(builder)));
       event_stream_->OnIncomingEvent(disconnection);
     }

     void OnReadRemoteVersionInformationComplete(
         hci::ErrorCode hci_status, uint8_t lmp_version, uint16_t manufacturer_name, uint16_t sub_version) override {}
     void OnLeReadRemoteFeaturesComplete(hci::ErrorCode hci_status, uint64_t features) override {}

     LeConnectionManagementCallbacks* GetCallbacks() {
       return this;
     }

     uint16_t handle_;
     std::shared_ptr<LeAclConnection> connection_;
     std::shared_ptr<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>> event_stream_;
     ::bluetooth::grpc::GrpcEventQueue<LeAclData> pending_acl_data_{std::string("PendingAclData") +
                                                                    std::to_string(handle_)};
   };

  private:
   AclManager* acl_manager_;
   ::bluetooth::os::Handler* facade_handler_;
   mutable std::mutex acl_connections_mutex_;
   std::map<bluetooth::hci::AddressWithType, std::shared_ptr<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>>>
       per_connection_events_;
   std::shared_ptr<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>> direct_connection_events_;
   bluetooth::hci::AddressWithType direct_connection_address_;
   std::shared_ptr<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>> incoming_connection_events_;
   std::map<uint16_t, Connection> acl_connections_;
 };

 void LeAclManagerFacadeModule::ListDependencies(ModuleList* list) const {
   ::bluetooth::grpc::GrpcFacadeModule::ListDependencies(list);
   list->add<AclManager>();
 }

 void LeAclManagerFacadeModule::Start() {
   ::bluetooth::grpc::GrpcFacadeModule::Start();
   service_ = new LeAclManagerFacadeService(GetDependency<AclManager>(), GetHandler());
 }

 void LeAclManagerFacadeModule::Stop() {
   delete service_;
   ::bluetooth::grpc::GrpcFacadeModule::Stop();
 }

 ::grpc::Service* LeAclManagerFacadeModule::GetService() const {
   return service_;
 }

 const ModuleFactory LeAclManagerFacadeModule::Factory =
     ::bluetooth::ModuleFactory([]() { return new LeAclManagerFacadeModule(); });

 }  // namespace facade
 }  // namespace hci
 }  // namespace bluetooth
	/*
	* Copyright 2019 The Android Open Source Project
	*
	* 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 "hci/facade/le_acl_manager_facade.h"

	#include <condition_variable>
	#include <memory>
	#include <mutex>

	#include "blueberry/facade/hci/le_acl_manager_facade.grpc.pb.h"
	#include "blueberry/facade/hci/le_acl_manager_facade.pb.h"
	#include "common/bind.h"
	#include "grpc/grpc_event_queue.h"
	#include "hci/acl_manager.h"
	#include "hci/hci_packets.h"
	#include "packet/raw_builder.h"

	using ::grpc::ServerAsyncResponseWriter;
	using ::grpc::ServerAsyncWriter;
	using ::grpc::ServerContext;

	using ::bluetooth::packet::RawBuilder;

	namespace bluetooth {
	namespace hci {
	namespace facade {

	using acl_manager::LeAclConnection;
	using acl_manager::LeConnectionCallbacks;
	using acl_manager::LeConnectionManagementCallbacks;

	using namespace blueberry::facade::hci;

	class LeAclManagerFacadeService : public LeAclManagerFacade::Service, public LeConnectionCallbacks {
	public:
	LeAclManagerFacadeService(AclManager* acl_manager, ::bluetooth::os::Handler* facade_handler)
	: acl_manager_(acl_manager), facade_handler_(facade_handler) {
	acl_manager_->RegisterLeCallbacks(this, facade_handler_);
	}

	~LeAclManagerFacadeService() {
	std::unique_lock<std::mutex> lock(acl_connections_mutex_);
	for (auto& conn : acl_connections_) {
	if (conn.second.connection_ != nullptr) {
	conn.second.connection_->GetAclQueueEnd()->UnregisterDequeue();
	conn.second.connection_.reset();
	}
	}
	}

	::grpc::Status CreateConnection(
	::grpc::ServerContext* context,
	const CreateConnectionMsg* request,
	::grpc::ServerWriter<LeConnectionEvent>* writer) override {
	Address peer_address;
	ASSERT(Address::FromString(request->peer_address().address().address(), peer_address));
	AddressWithType peer(peer_address, static_cast<AddressType>(request->peer_address().type()));
	bool is_direct = request->is_direct();
	acl_manager_->CreateLeConnection(peer, is_direct);

	if (is_direct) {
	if (direct_connection_events_ != nullptr) {
	return ::grpc::Status(
	::grpc::StatusCode::RESOURCE_EXHAUSTED, "Only one outstanding direct request is supported");
	}
	direct_connection_events_ = std::make_shared<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>>(
	std::string("direct connection attempt ") + peer.ToString());
	direct_connection_address_ = peer;
	return direct_connection_events_->RunLoop(context, writer);
	}
	per_connection_events_.emplace(
	peer,
	std::make_unique<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>>(
	std::string("connection attempt ") + peer.ToString()));
	return per_connection_events_[peer]->RunLoop(context, writer);
	}

	::grpc::Status CancelConnection(
	::grpc::ServerContext* context,
	const ::blueberry::facade::BluetoothAddressWithType* request,
	google::protobuf::Empty* response) override {
	Address peer_address;
	ASSERT(Address::FromString(request->address().address(), peer_address));
	AddressWithType peer(peer_address, static_cast<AddressType>(request->type()));
	if (peer == direct_connection_address_) {
	direct_connection_address_ = AddressWithType();
	direct_connection_events_.reset();
	} else {
	if (per_connection_events_.count(peer) == 0) {
	return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "No matching outstanding connection");
	}
	}
	acl_manager_->CancelLeConnect(peer);
	return ::grpc::Status::OK;
	}

	::grpc::Status Disconnect(::grpc::ServerContext* context, const LeHandleMsg* request,
	::google::protobuf::Empty* response) override {
	std::unique_lock<std::mutex> lock(acl_connections_mutex_);
	auto connection = acl_connections_.find(request->handle());
	if (connection == acl_connections_.end()) {
	LOG_ERROR("Invalid handle");
	return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid handle");
	} else {
	connection->second.connection_->Disconnect(DisconnectReason::REMOTE_USER_TERMINATED_CONNECTION);
	return ::grpc::Status::OK;
	}
	}

	#define GET_CONNECTION(view) \
	std::map<uint16_t, Connection>::iterator connection; \
	do { \
	if (!view.IsValid()) { \
	return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid handle"); \
	} \
	std::unique_lock<std::mutex> lock(acl_connections_mutex_); \
	connection = acl_connections_.find(view.GetConnectionHandle()); \
	if (connection == acl_connections_.end()) { \
	return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid handle"); \
	} \
	} while (0)

	::grpc::Status ConnectionCommand(
	::grpc::ServerContext* context,
	const LeConnectionCommandMsg* request,
	::google::protobuf::Empty* response) override {
	auto command_view =
	ConnectionManagementCommandView::Create(AclCommandView::Create(CommandView::Create(PacketView<kLittleEndian>(
	std::make_shared<std::vector<uint8_t>>(request->packet().begin(), request->packet().end())))));
	if (!command_view.IsValid()) {
	return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid command packet");
	}
	switch (command_view.GetOpCode()) {
	case OpCode::DISCONNECT: {
	auto view = DisconnectView::Create(command_view);
	GET_CONNECTION(view);
	connection->second.connection_->Disconnect(view.GetReason());
	return ::grpc::Status::OK;
	}
	default:
	return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid command packet");
	}
	}
	#undef GET_CONNECTION

	::grpc::Status FetchIncomingConnection(
	::grpc::ServerContext* context,
	const google::protobuf::Empty* request,
	::grpc::ServerWriter<LeConnectionEvent>* writer) override {
	if (incoming_connection_events_ != nullptr) {
	return ::grpc::Status(
	::grpc::StatusCode::RESOURCE_EXHAUSTED, "Only one outstanding incoming connection is supported");
	}
	incoming_connection_events_ =
	std::make_unique<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>>(std::string("incoming connection "));
	return incoming_connection_events_->RunLoop(context, writer);
	}

	::grpc::Status AddDeviceToResolvingList(
	::grpc::ServerContext* context, const IrkMsg* request, ::google::protobuf::Empty* response) override {
	Address peer_address;
	ASSERT(Address::FromString(request->peer().address().address(), peer_address));
	AddressWithType peer(peer_address, static_cast<AddressType>(request->peer().type()));

	auto request_peer_irk_length = request->peer_irk().end() - request->peer_irk().begin();

	if (request_peer_irk_length != crypto_toolbox::OCTET16_LEN) {
	return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid Peer IRK");
	}

	auto request_local_irk_length = request->local_irk().end() - request->local_irk().begin();
	if (request_local_irk_length != crypto_toolbox::OCTET16_LEN) {
	return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid Local IRK");
	}

	crypto_toolbox::Octet16 peer_irk = {};
	crypto_toolbox::Octet16 local_irk = {};

	std::vector<uint8_t> peer_irk_data(request->peer_irk().begin(), request->peer_irk().end());
	std::copy_n(peer_irk_data.begin(), crypto_toolbox::OCTET16_LEN, peer_irk.begin());

	std::vector<uint8_t> local_irk_data(request->local_irk().begin(), request->local_irk().end());
	std::copy_n(local_irk_data.begin(), crypto_toolbox::OCTET16_LEN, local_irk.begin());

	acl_manager_->AddDeviceToResolvingList(peer, peer_irk, local_irk);
	return ::grpc::Status::OK;
	}

	::grpc::Status SendAclData(
	::grpc::ServerContext* context, const LeAclData* request, ::google::protobuf::Empty* response) override {
	std::promise<void> promise;
	auto future = promise.get_future();
	{
	std::unique_lock<std::mutex> lock(acl_connections_mutex_);
	auto connection = acl_connections_.find(request->handle());
	if (connection == acl_connections_.end()) {
	return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid handle");
	}
	connection->second.connection_->GetAclQueueEnd()->RegisterEnqueue(
	facade_handler_,
	common::Bind(
	&LeAclManagerFacadeService::enqueue_packet,
	common::Unretained(this),
	common::Unretained(request),
	common::Passed(std::move(promise))));
	auto status = future.wait_for(std::chrono::milliseconds(1000));
	if (status != std::future_status::ready) {
	return ::grpc::Status(::grpc::StatusCode::RESOURCE_EXHAUSTED, "Can't send packet");
	}
	}
	return ::grpc::Status::OK;
	}

	std::unique_ptr<BasePacketBuilder> enqueue_packet(const LeAclData* request, std::promise<void> promise) {
	auto connection = acl_connections_.find(request->handle());
	ASSERT_LOG(connection != acl_connections_.end(), "handle %d", request->handle());
	connection->second.connection_->GetAclQueueEnd()->UnregisterEnqueue();
	std::unique_ptr<RawBuilder> packet =
	std::make_unique<RawBuilder>(std::vector<uint8_t>(request->payload().begin(), request->payload().end()));
	promise.set_value();
	return packet;
	}

	::grpc::Status FetchAclData(
	::grpc::ServerContext* context, const LeHandleMsg* request, ::grpc::ServerWriter<LeAclData>* writer) override {
	auto connection = acl_connections_.find(request->handle());
	if (connection == acl_connections_.end()) {
	return ::grpc::Status(::grpc::StatusCode::INVALID_ARGUMENT, "Invalid handle");
	}
	return connection->second.pending_acl_data_.RunLoop(context, writer);
	}

	static inline std::string builder_to_string(std::unique_ptr<BasePacketBuilder> builder) {
	std::vector<uint8_t> bytes;
	BitInserter bit_inserter(bytes);
	builder->Serialize(bit_inserter);
	return std::string(bytes.begin(), bytes.end());
	}

	void on_incoming_acl(std::shared_ptr<LeAclConnection> connection, uint16_t handle) {
	auto packet = connection->GetAclQueueEnd()->TryDequeue();
	auto connection_tracker = acl_connections_.find(handle);
	ASSERT_LOG(connection_tracker != acl_connections_.end(), "handle %d", handle);
	LeAclData acl_data;
	acl_data.set_handle(handle);
	acl_data.set_payload(std::string(packet->begin(), packet->end()));
	connection_tracker->second.pending_acl_data_.OnIncomingEvent(acl_data);
	}

	void OnLeConnectSuccess(AddressWithType peer, std::unique_ptr<LeAclConnection> connection) override {
	LOG_INFO("%s", peer.ToString().c_str());

	std::unique_lock<std::mutex> lock(acl_connections_mutex_);
	std::shared_ptr<LeAclConnection> shared_connection = std::move(connection);
	uint16_t handle = shared_connection->GetHandle();
	auto role = shared_connection->GetRole();
	if (role == Role::PERIPHERAL) {
	ASSERT(incoming_connection_events_ != nullptr);
	per_connection_events_.emplace(peer, incoming_connection_events_);
	incoming_connection_events_.reset();
	} else if (direct_connection_address_ == peer) {
	direct_connection_address_ = AddressWithType();
	per_connection_events_.emplace(peer, direct_connection_events_);
	direct_connection_events_.reset();
	}
	acl_connections_.emplace(
	std::piecewise_construct,
	std::forward_as_tuple(handle),
	std::forward_as_tuple(handle, shared_connection, per_connection_events_[peer]));
	shared_connection->GetAclQueueEnd()->RegisterDequeue(
	facade_handler_,
	common::Bind(&LeAclManagerFacadeService::on_incoming_acl, common::Unretained(this), shared_connection, handle));
	auto callbacks = acl_connections_.find(handle)->second.GetCallbacks();
	shared_connection->RegisterCallbacks(callbacks, facade_handler_);
	{
	std::unique_ptr<BasePacketBuilder> builder = LeConnectionCompleteBuilder::Create(
	ErrorCode::SUCCESS, handle, role, peer.GetAddressType(), peer.GetAddress(), 1, 2, 3, ClockAccuracy::PPM_20);
	LeConnectionEvent success;
	success.set_payload(builder_to_string(std::move(builder)));
	per_connection_events_[peer]->OnIncomingEvent(success);
	}
	}

	void OnLeConnectFail(AddressWithType address, ErrorCode reason) override {
	std::unique_ptr<BasePacketBuilder> builder = LeConnectionCompleteBuilder::Create(
	reason, 0, Role::CENTRAL, address.GetAddressType(), address.GetAddress(), 0, 0, 0, ClockAccuracy::PPM_20);
	LeConnectionEvent fail;
	fail.set_payload(builder_to_string(std::move(builder)));
	if (address == direct_connection_address_) {
	direct_connection_address_ = AddressWithType();
	direct_connection_events_->OnIncomingEvent(fail);
	} else {
	per_connection_events_[address]->OnIncomingEvent(fail);
	}
	}

	class Connection : public LeConnectionManagementCallbacks {
	public:
	Connection(
	uint16_t handle,
	std::shared_ptr<LeAclConnection> connection,
	std::shared_ptr<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>> event_stream)
	: handle_(handle), connection_(std::move(connection)), event_stream_(std::move(event_stream)) {}
	void OnConnectionUpdate(
	hci::ErrorCode hci_status,
	uint16_t connection_interval,
	uint16_t connection_latency,
	uint16_t supervision_timeout) override {
	LOG_INFO(
	"interval: 0x%hx, latency: 0x%hx, timeout 0x%hx",
	connection_interval,
	connection_latency,
	supervision_timeout);
	}

	void OnDataLengthChange(uint16_t tx_octets, uint16_t tx_time, uint16_t rx_octets, uint16_t rx_time) override {
	LOG_INFO(
	"tx_octets: 0x%hx, tx_time: 0x%hx, rx_octets 0x%hx, rx_time 0x%hx", tx_octets, tx_time, rx_octets, rx_time);
	}

	void OnPhyUpdate(hci::ErrorCode hci_status, uint8_t tx_phy, uint8_t rx_phy) override {}
	void OnLocalAddressUpdate(AddressWithType address_with_type) override {}
	void OnDisconnection(ErrorCode reason) override {
	std::unique_ptr<BasePacketBuilder> builder =
	DisconnectionCompleteBuilder::Create(ErrorCode::SUCCESS, handle_, reason);
	LeConnectionEvent disconnection;
	disconnection.set_payload(builder_to_string(std::move(builder)));
	event_stream_->OnIncomingEvent(disconnection);
	}

	void OnReadRemoteVersionInformationComplete(
	hci::ErrorCode hci_status, uint8_t lmp_version, uint16_t manufacturer_name, uint16_t sub_version) override {}
	void OnLeReadRemoteFeaturesComplete(hci::ErrorCode hci_status, uint64_t features) override {}

	LeConnectionManagementCallbacks* GetCallbacks() {
	return this;
	}

	uint16_t handle_;
	std::shared_ptr<LeAclConnection> connection_;
	std::shared_ptr<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>> event_stream_;
	::bluetooth::grpc::GrpcEventQueue<LeAclData> pending_acl_data_{std::string("PendingAclData") +
	std::to_string(handle_)};
	};

	private:
	AclManager* acl_manager_;
	::bluetooth::os::Handler* facade_handler_;
	mutable std::mutex acl_connections_mutex_;
	std::map<bluetooth::hci::AddressWithType, std::shared_ptr<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>>>
	per_connection_events_;
	std::shared_ptr<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>> direct_connection_events_;
	bluetooth::hci::AddressWithType direct_connection_address_;
	std::shared_ptr<::bluetooth::grpc::GrpcEventQueue<LeConnectionEvent>> incoming_connection_events_;
	std::map<uint16_t, Connection> acl_connections_;
	};

	void LeAclManagerFacadeModule::ListDependencies(ModuleList* list) const {
	::bluetooth::grpc::GrpcFacadeModule::ListDependencies(list);
	list->add<AclManager>();
	}

	void LeAclManagerFacadeModule::Start() {
	::bluetooth::grpc::GrpcFacadeModule::Start();
	service_ = new LeAclManagerFacadeService(GetDependency<AclManager>(), GetHandler());
	}

	void LeAclManagerFacadeModule::Stop() {
	delete service_;
	::bluetooth::grpc::GrpcFacadeModule::Stop();
	}

	::grpc::Service* LeAclManagerFacadeModule::GetService() const {
	return service_;
	}

	const ModuleFactory LeAclManagerFacadeModule::Factory =
	::bluetooth::ModuleFactory([]() { return new LeAclManagerFacadeModule(); });

	} // namespace facade
	} // namespace hci
	} // namespace bluetooth