| // Copyright 2017 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef MIDIS_CLIENT_H_ |
| #define MIDIS_CLIENT_H_ |
| |
| #include <memory> |
| #include <vector> |
| |
| #include <base/files/scoped_file.h> |
| #include <base/memory/weak_ptr.h> |
| #include <brillo/message_loops/message_loop.h> |
| |
| #include "midis/device.h" |
| #include "midis/device_tracker.h" |
| #include "midis/messages.h" |
| |
| namespace midis { |
| |
| class Client { |
| public: |
| ~Client(); |
| static std::unique_ptr<Client> Create(base::ScopedFD fd, |
| DeviceTracker* device_tracker); |
| |
| private: |
| Client(base::ScopedFD fd, DeviceTracker* device_tracker); |
| // Start monitoring the client socket fd for messages from the client. |
| bool StartMonitoring(); |
| // Stop the task which was watching the client socket df. |
| void StopMonitoring(); |
| // Main function to handle all messages sent by the client. |
| // Messages will be of the following format: |
| // |
| // |<--- 4 bytes --->|<---- 4 bytes ---->|<---- payload_size bytes --->| |
| // | message type | size of payload | message payload | |
| void HandleClientMessages(); |
| |
| // Return the list of all devices available to the client. |
| // The message format will be the same as that used by Client messages. |
| void SendDevicesList(); |
| |
| // Prepare the payload for devices information. |
| // Payload structure: |
| // |
| // |<-- 1 byte -->|<-- sizeof(struct MidisDeviceInfo) bytes -->|.... |
| // | num entries | device1_info | device2_info |
| // |.... |
| uint32_t PrepareDeviceListPayload(uint8_t* payload_buf, size_t buf_len); |
| |
| base::ScopedFD client_fd_; |
| brillo::MessageLoop::TaskId msg_taskid_; |
| // The DeviceTracker can be guaranteed to exist for the lifetime of the |
| // service. As such, it is safe to maintain this pointer as a means to make |
| // updates and derive information regarding devices. |
| DeviceTracker* device_tracker_; |
| base::WeakPtrFactory<Client> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(Client); |
| }; |
| |
| } // namespace midis |
| |
| #endif // MIDIS_CLIENT_H_ |