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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef DEVICE_BLUETOOTH_SOCKET_H_
#define DEVICE_BLUETOOTH_SOCKET_H_
#include <memory>
#include <string>
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "device/bluetooth/bluetooth_socket.h"
#include "device/bluetooth/public/mojom/adapter.mojom.h"
#include "mojo/public/cpp/system/data_pipe.h"
#include "mojo/public/cpp/system/simple_watcher.h"
namespace net {
class IOBuffer;
} // namespace net
namespace bluetooth {
// Implementation of Mojo Socket in
// device/bluetooth/public/mojom/adapter.mojom.
// It handles requests to interact with a Socket.
// Uses the platform abstraction of //device/bluetooth.
// An instance of this class is constructed by Adapter and strongly bound to its
// MessagePipe. When the instance is destroyed, the underlying BluetoothSocket
// is destroyed.
class Socket : public mojom::Socket {
public:
Socket(scoped_refptr<device::BluetoothSocket> bluetooth_socket,
mojo::ScopedDataPipeProducerHandle receive_stream,
mojo::ScopedDataPipeConsumerHandle send_stream);
~Socket() override;
Socket(const Socket&) = delete;
Socket& operator=(const Socket&) = delete;
// mojom::Socket:
void Disconnect(DisconnectCallback callback) override;
private:
// "Receiving" in this context means receiving data from |bluetooth_socket_|
// via BluetoothSocket::Receive() and *writing* it to |receive_stream_|.
void OnReceiveStreamWritable(MojoResult result);
void ShutdownReceive();
void ReceiveMore();
void OnBluetoothSocketReceive(void* pending_write_buffer,
int num_bytes_received,
scoped_refptr<net::IOBuffer> io_buffer);
void OnBluetoothSocketReceiveError(
device::BluetoothSocket::ErrorReason error_reason,
const std::string& error_message);
// "Sending" in this context means *reading* data from |send_stream_| and
// sending it over the |bluetooth_socket_| via BluetoothSocket::Send().
void OnSendStreamReadable(MojoResult result);
void ShutdownSend();
void SendMore();
void OnBluetoothSocketSend(int num_bytes_sent);
void OnBluetoothSocketSendError(const std::string& error_message);
scoped_refptr<device::BluetoothSocket> bluetooth_socket_;
mojo::ScopedDataPipeProducerHandle receive_stream_;
mojo::ScopedDataPipeConsumerHandle send_stream_;
mojo::SimpleWatcher receive_stream_watcher_;
mojo::SimpleWatcher send_stream_watcher_;
base::WeakPtrFactory<Socket> weak_ptr_factory_{this};
};
} // namespace bluetooth
#endif // DEVICE_BLUETOOTH_SOCKET_H_
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