1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_ASH_COMPONENTS_DATA_MIGRATION_RTS_RECEIVER_H_
#define CHROMEOS_ASH_COMPONENTS_DATA_MIGRATION_RTS_RECEIVER_H_
#include <cstdint>
#include <optional>
#include <vector>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
class NearbyConnection;
namespace data_migration {
class PendingFileTransferQueue;
// RTS - "Request-to-Send". A message sent from the remote device to this device
// asking if it's OK to start transferring a file (identified by its
// payload_id). The remote device will wait for a CTS ("Clear-to-Send") message
// in response before initiating the transfer. Both RTS and CTS are small
// metadata payloads.
//
// Continuously receives and parses RTS messages from the remote device and
// pushes the requested file payload ids to the `PendingFileTransferQueue`. If
// the connection to the remote device is closed while `RtsReceiver` is active,
// it silently stops receiving and is idle until destroyed.
class RtsReceiver {
public:
RtsReceiver(NearbyConnection* nearby_connection,
PendingFileTransferQueue* pending_file_transfer_queue);
RtsReceiver(const RtsReceiver&) = delete;
RtsReceiver& operator=(const RtsReceiver&) = delete;
~RtsReceiver();
private:
void ReadNextRts();
void OnRtsReceived(std::optional<std::vector<uint8_t>> bytes);
raw_ptr<NearbyConnection> nearby_connection_;
const raw_ptr<PendingFileTransferQueue> pending_file_transfer_queue_;
base::WeakPtrFactory<RtsReceiver> weak_ptr_factory_{this};
};
} // namespace data_migration
#endif // CHROMEOS_ASH_COMPONENTS_DATA_MIGRATION_RTS_RECEIVER_H_
|
