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// Copyright 2020 Google LLC
//
// 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
//
// https://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.
#ifndef PLATFORM_IMPL_WINDOWS_BLUETOOTH_CLASSIC_SOCKET_H_
#define PLATFORM_IMPL_WINDOWS_BLUETOOTH_CLASSIC_SOCKET_H_
#include "platform/api/bluetooth_classic.h"
#include "platform/impl/windows/bluetooth_classic_device.h"
#include "platform/impl/windows/generated/winrt/Windows.Foundation.h"
#include "platform/impl/windows/generated/winrt/Windows.Networking.Sockets.h"
#include "platform/impl/windows/generated/winrt/Windows.Storage.Streams.h"
namespace location {
namespace nearby {
namespace windows {
// Provides data for a hostname or an IP address.
// https://docs.microsoft.com/en-us/uwp/api/windows.networking.hostname?view=winrt-20348
using winrt::Windows::Networking::HostName;
// Supports network communication using a stream socket over Bluetooth RFCOMM.
// https://docs.microsoft.com/en-us/uwp/api/windows.networking.sockets.streamsocket?view=winrt-20348
using winrt::Windows::Networking::Sockets::IStreamSocket;
using winrt::Windows::Networking::Sockets::StreamSocket;
// Provides a default implementation of the IBuffer interface and its related
// interfaces.
// https://docs.microsoft.com/en-us/uwp/api/windows.storage.streams.buffer?view=winrt-20348
using winrt::Windows::Storage::Streams::Buffer;
// Represents a sequential stream of bytes to be read.
// https://docs.microsoft.com/en-us/uwp/api/windows.storage.streams.iinputstream?view=winrt-20348
using winrt::Windows::Storage::Streams::IInputStream;
// Represents a sequential stream of bytes to be written.
// https://docs.microsoft.com/en-us/uwp/api/windows.storage.streams.ioutputstream?view=winrt-20348
using winrt::Windows::Storage::Streams::IOutputStream;
// Specifies the read options for an input stream.
// This enumeration has a FlagsAttribute attribute that allows a bitwise
// combination of its member values.
// https://docs.microsoft.com/en-us/uwp/api/windows.storage.streams.inputstreamoptions?view=winrt-20348
using winrt::Windows::Storage::Streams::InputStreamOptions;
// Reads data from an input stream.
// https://docs.microsoft.com/en-us/uwp/api/windows.storage.streams.datareader?view=winrt-20348
using winrt::Windows::Storage::Streams::DataReader;
// Represents an asynchronous action.
// https://docs.microsoft.com/en-us/uwp/api/windows.foundation.iasyncaction?view=winrt-20348
using winrt::Windows::Foundation::IAsyncAction;
// https://developer.android.com/reference/android/bluetooth/BluetoothSocket.html.
class BluetoothSocket : public api::BluetoothSocket {
public:
BluetoothSocket();
BluetoothSocket(StreamSocket streamSocket);
~BluetoothSocket() override;
// NOTE:
// It is an undefined behavior if GetInputStream() or GetOutputStream() is
// called for a not-connected BluetoothSocket, i.e. any object that is not
// returned by BluetoothClassicMedium::ConnectToService() for client side or
// BluetoothServerSocket::Accept() for server side of connection.
// Returns the InputStream of this connected BluetoothSocket.
InputStream& GetInputStream() override;
// Returns the OutputStream of this connected BluetoothSocket.
OutputStream& GetOutputStream() override;
// Closes both input and output streams, marks Socket as closed.
// After this call object should be treated as not connected.
// Returns Exception::kIo on error, Exception::kSuccess otherwise.
Exception Close() override;
// https://developer.android.com/reference/android/bluetooth/BluetoothSocket.html#getRemoteDevice()
// Returns valid BluetoothDevice pointer if there is a connection, and
// nullptr otherwise.
api::BluetoothDevice* GetRemoteDevice() override;
// Connect asynchronously to the target remote device
void Connect(HostName connectionHostName,
winrt::hstring connectionServiceName);
IAsyncAction CancelIOAsync();
private:
class BluetoothInputStream : public InputStream {
public:
BluetoothInputStream(IInputStream stream);
~BluetoothInputStream() override = default;
ExceptionOr<ByteArray> Read(std::int64_t size) override;
Exception Close() override;
private:
IInputStream winrt_stream_;
};
class BluetoothOutputStream : public OutputStream {
public:
BluetoothOutputStream(IOutputStream stream);
~BluetoothOutputStream() override = default;
Exception Write(const ByteArray& data) override;
Exception Flush() override;
Exception Close() override;
private:
IOutputStream winrt_stream_;
};
std::unique_ptr<BluetoothInputStream> input_stream_;
std::unique_ptr<BluetoothOutputStream> output_stream_;
StreamSocket windows_socket_;
std::unique_ptr<BluetoothDevice> bluetooth_device_;
};
} // namespace windows
} // namespace nearby
} // namespace location
#endif // PLATFORM_IMPL_WINDOWS_BLUETOOTH_CLASSIC_SOCKET_H_