File: secure_channel_host_connection.cc

package info (click to toggle)
chromium 139.0.7258.127-1
  • links: PTS, VCS
  • area: main
  • in suites:
  • size: 6,122,068 kB
  • sloc: cpp: 35,100,771; ansic: 7,163,530; javascript: 4,103,002; python: 1,436,920; asm: 946,517; xml: 746,709; pascal: 187,653; perl: 88,691; sh: 88,436; objc: 79,953; sql: 51,488; cs: 44,583; fortran: 24,137; makefile: 22,147; tcl: 15,277; php: 13,980; yacc: 8,984; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (170 lines) | stat: -rw-r--r-- 7,081 bytes parent folder | download | duplicates (6)
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
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
// 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.

#include "chromeos/ash/components/tether/secure_channel_host_connection.h"

namespace ash::tether {

namespace {

secure_channel::ConnectionPriority GetSecureChannelConnectionPriority(
    HostConnection::Factory::ConnectionPriority connection_priority) {
  switch (connection_priority) {
    case HostConnection::Factory::ConnectionPriority::kLow:
      return secure_channel::ConnectionPriority::kLow;
    case HostConnection::Factory::ConnectionPriority::kMedium:
      return secure_channel::ConnectionPriority::kMedium;
    case HostConnection::Factory::ConnectionPriority::kHigh:
      return secure_channel::ConnectionPriority::kHigh;
  }
}
}  // namespace

SecureChannelHostConnection::Factory::Factory(
    raw_ptr<device_sync::DeviceSyncClient> device_sync_client,
    raw_ptr<secure_channel::SecureChannelClient> secure_channel_client,
    raw_ptr<TetherHostFetcher> tether_host_fetcher)
    : device_sync_client_(device_sync_client),
      secure_channel_client_(secure_channel_client),
      tether_host_fetcher_(tether_host_fetcher) {}

SecureChannelHostConnection::Factory::~Factory() = default;

void SecureChannelHostConnection::Factory::ScanForTetherHostAndCreateConnection(
    const std::string& device_id,
    ConnectionPriority connection_priority,
    raw_ptr<PayloadListener> payload_listener,
    OnDisconnectionCallback on_disconnection,
    HostConnection::Factory::OnConnectionCreatedCallback
        on_connection_created) {
  std::optional<multidevice::RemoteDeviceRef> tether_host =
      tether_host_fetcher_->GetTetherHost();

  CHECK(tether_host.has_value());
  CHECK(tether_host->GetDeviceId() == device_id);

  PA_LOG(INFO) << "Creating a SecureChannelHostConnection to "
               << tether_host->GetTruncatedDeviceIdForLogs() << ".";
  return Create(TetherHost(*tether_host), connection_priority, payload_listener,
                std::move(on_disconnection), std::move(on_connection_created));
}

void SecureChannelHostConnection::Factory::Create(
    const TetherHost& tether_host,
    ConnectionPriority connection_priority,
    raw_ptr<PayloadListener> payload_listener,
    OnDisconnectionCallback on_disconnection,
    HostConnection::Factory::OnConnectionCreatedCallback
        on_connection_created) {
  PA_LOG(INFO) << "Attempting to create a SecureChannelHostConnection to "
               << tether_host.GetTruncatedDeviceIdForLogs() << ".";

  CHECK(tether_host.remote_device_ref().has_value());

  std::optional<multidevice::RemoteDeviceRef> local_device =
      device_sync_client_->GetLocalDeviceMetadata();

  CHECK(local_device.has_value());

  base::Uuid connection_attempt_id = base::Uuid::GenerateRandomV4();

  active_connection_attempts_.emplace(
      connection_attempt_id,
      std::make_unique<ConnectionAttemptDelegateImpl>(
          *local_device, *tether_host.remote_device_ref(),
          secure_channel_client_, payload_listener,
          std::move(on_disconnection)));

  active_connection_attempts_.at(connection_attempt_id)
      ->Start(
          GetSecureChannelConnectionPriority(connection_priority),
          base::BindOnce(&Factory::OnConnectionAttemptFinished,
                         weak_ptr_factory_.GetWeakPtr(), connection_attempt_id,
                         std::move(on_connection_created)));
}

SecureChannelHostConnection::Factory::ConnectionAttemptDelegateImpl::
    ConnectionAttemptDelegateImpl(
        const multidevice::RemoteDeviceRef& local_device,
        const multidevice::RemoteDeviceRef& remote_device,
        secure_channel::SecureChannelClient* secure_channel_client,
        HostConnection::PayloadListener* payload_listener,
        HostConnection::OnDisconnectionCallback on_disconnection)
    : local_device_(local_device),
      remote_device_(remote_device),
      payload_listener_(payload_listener),
      on_disconnection_(std::move(on_disconnection)),
      secure_channel_client_(secure_channel_client) {}

SecureChannelHostConnection::Factory::ConnectionAttemptDelegateImpl::
    ~ConnectionAttemptDelegateImpl() = default;

void SecureChannelHostConnection::Factory::ConnectionAttemptDelegateImpl::Start(
    secure_channel::ConnectionPriority connection_priority,
    OnConnectionAttemptDelegateFinishedCallback
        on_connection_attempt_delegate_finished) {
  on_connection_attempt_delegate_finished_ =
      std::move(on_connection_attempt_delegate_finished);
  connection_attempt_ = secure_channel_client_->ListenForConnectionFromDevice(
      remote_device_, local_device_, "magic_tether",
      secure_channel::ConnectionMedium::kBluetoothLowEnergy,
      connection_priority);
  connection_attempt_->SetDelegate(this);
}
// secure_channel::ConnectionAttempt::Delegate:
void SecureChannelHostConnection::Factory::ConnectionAttemptDelegateImpl::
    OnConnectionAttemptFailure(
        secure_channel::mojom::ConnectionAttemptFailureReason reason) {
  PA_LOG(ERROR) << "Failed to connect to "
                << remote_device_.GetTruncatedDeviceIdForLogs()
                << ". Failure Reason: [" << reason << "].";
  std::move(on_connection_attempt_delegate_finished_)
      .Run(/*host_connection=*/nullptr);
}
void SecureChannelHostConnection::Factory::ConnectionAttemptDelegateImpl::
    OnConnection(std::unique_ptr<secure_channel::ClientChannel> channel) {
  std::move(on_connection_attempt_delegate_finished_)
      .Run(base::WrapUnique<HostConnection>(new SecureChannelHostConnection(
          payload_listener_, std::move(on_disconnection_),
          std::move(channel))));
}

void SecureChannelHostConnection::Factory::OnConnectionAttemptFinished(
    base::Uuid connection_attempt_id,
    HostConnection::Factory::OnConnectionCreatedCallback on_connection_created,
    std::unique_ptr<HostConnection> host_connection) {
  active_connection_attempts_.erase(connection_attempt_id);
  std::move(on_connection_created).Run(std::move(host_connection));
}

SecureChannelHostConnection::SecureChannelHostConnection(
    raw_ptr<HostConnection::PayloadListener> payload_listener,
    HostConnection::OnDisconnectionCallback on_disconnection,
    std::unique_ptr<secure_channel::ClientChannel> channel)
    : HostConnection(payload_listener, std::move(on_disconnection)),
      client_channel_(std::move(channel)) {
  client_channel_->AddObserver(this);
}

SecureChannelHostConnection::~SecureChannelHostConnection() {
  client_channel_->RemoveObserver(this);
}

void SecureChannelHostConnection::SendMessage(
    std::unique_ptr<MessageWrapper> message,
    OnMessageSentCallback on_message_sent_callback) {
  client_channel_->SendMessage(message->ToRawMessage(),
                               std::move(on_message_sent_callback));
}

void SecureChannelHostConnection::OnDisconnected() {
  std::move(on_disconnection_).Run();
}

void SecureChannelHostConnection::OnMessageReceived(
    const std::string& message) {
  ParseMessageAndNotifyListener(message);
}

}  // namespace ash::tether