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// 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 "chrome/browser/ash/app_mode/kiosk_network_state_observer.h"
#include <optional>
#include <string>
#include <vector>
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "chrome/common/pref_names.h"
#include "chromeos/ash/components/dbus/shill/shill_service_client.h"
#include "chromeos/ash/components/network/network_configuration_handler.h"
#include "chromeos/ash/components/network/network_handler.h"
#include "chromeos/ash/components/network/network_profile_handler.h"
#include "chromeos/ash/components/network/network_state.h"
#include "chromeos/ash/components/network/network_state_handler.h"
#include "chromeos/ash/components/network/network_type_pattern.h"
#include "chromeos/ash/components/network/shill_property_util.h"
#include "components/device_event_log/device_event_log.h"
#include "dbus/object_path.h"
#include "third_party/cros_system_api/dbus/shill/dbus-constants.h"
namespace ash {
namespace {
// TODO(b/365490226): replace this error with shill constant.
constexpr char kConfigFailureTemporaryServiceConfiguredButNotUsable[] =
"Config.CreateConfiguration Temporary service configured but not usable";
void CopyPropertyIfExists(std::string_view key,
const base::Value::Dict& shill_properties,
base::Value::Dict& new_properties) {
const base::Value* property_value = shill_properties.Find(key);
if (property_value) {
new_properties.Set(key, (*property_value).Clone());
}
}
} // namespace
KioskNetworkStateObserver::KioskNetworkStateObserver(PrefService* pref_service)
: pref_service_(pref_service) {
CHECK(pref_service_);
pref_change_registrar_.Init(pref_service);
pref_change_registrar_.Add(
prefs::kKioskActiveWiFiCredentialsScopeChangeEnabled,
base::BindRepeating(
&KioskNetworkStateObserver::PolicyChanged,
// It is safe to use `base::Unretained` since this class
// owns `pref_change_registrar_` and it is destroyed before `this` .
base::Unretained(this)));
if (IsPolicyEnabled()) {
StartActiveWifiExposureProcess();
}
}
KioskNetworkStateObserver::~KioskNetworkStateObserver() = default;
bool KioskNetworkStateObserver::IsPolicyEnabled() const {
return pref_service_->GetBoolean(
prefs::kKioskActiveWiFiCredentialsScopeChangeEnabled);
}
void KioskNetworkStateObserver::SetWifiExposureAttemptCallbackForTesting(
base::RepeatingCallback<void(bool is_successful_attempt)> callback) {
wifi_exposure_attempt_callback_ = std::move(callback);
}
void KioskNetworkStateObserver::ActiveNetworksChanged(
const std::vector<const NetworkState*>& active_networks) {
ExposeActiveWifiConfiguration();
}
void KioskNetworkStateObserver::StartActiveWifiExposureProcess() {
if (active_wifi_exposed_) {
return;
}
network_state_handler_observation_.Observe(
NetworkHandler::Get()->network_state_handler());
ExposeActiveWifiConfiguration();
}
void KioskNetworkStateObserver::StopActiveWifiExposureProcess() {
network_state_handler_observation_.Reset();
}
void KioskNetworkStateObserver::ExposeActiveWifiConfiguration() {
if (active_wifi_exposed_) {
return;
}
const auto* network_state =
ash::NetworkHandler::Get()->network_state_handler()->ActiveNetworkByType(
NetworkTypePattern::WiFi());
if (!network_state) {
MaybeRunWifiExposureAttemptCallback(false);
return;
}
active_wifi_exposed_ = true;
ShillServiceClient::Get()->GetWiFiPassphrase(
dbus::ObjectPath(network_state->path()),
base::BindOnce(&KioskNetworkStateObserver::OnGetWifiPassphraseResult,
weak_ptr_factory_.GetWeakPtr(), network_state->path()),
base::BindOnce(&KioskNetworkStateObserver::OnGetWifiPassphraseError,
weak_ptr_factory_.GetWeakPtr()));
}
void KioskNetworkStateObserver::OnGetWifiPassphraseResult(
const std::string& service_path,
const std::string& passphrase) {
NetworkHandler::Get()->network_configuration_handler()->GetShillProperties(
service_path,
base::BindOnce(&KioskNetworkStateObserver::ReceiveProperties,
weak_ptr_factory_.GetWeakPtr(), passphrase));
}
void KioskNetworkStateObserver::OnGetWifiPassphraseError(
const std::string& error_name,
const std::string& error_message) {
NET_LOG(ERROR) << "Wi-Fi passphrase error:" << error_name << " "
<< error_message;
FailCurrentAttempt();
}
void KioskNetworkStateObserver::ReceiveProperties(
const std::string& passphrase,
const std::string& service_path,
std::optional<base::Value::Dict> optional_shill_properties) {
if (!optional_shill_properties) {
NET_LOG(ERROR) << "Received shill properties are empty.";
return;
}
const base::Value::Dict& shill_properties = optional_shill_properties.value();
base::Value::Dict properties;
properties.Set(shill::kProfileProperty,
NetworkProfileHandler::GetSharedProfilePath());
properties.Set(shill::kPassphraseProperty, passphrase);
CopyPropertyIfExists(shill::kSecurityClassProperty, shill_properties,
properties);
CopyPropertyIfExists(shill::kWifiHexSsid, shill_properties, properties);
CopyPropertyIfExists(shill::kGuidProperty, shill_properties, properties);
CopyPropertyIfExists(shill::kAutoConnectProperty, shill_properties,
properties);
CopyPropertyIfExists(shill::kTypeProperty, shill_properties, properties);
CopyPropertyIfExists(shill::kSaveCredentialsProperty, shill_properties,
properties);
CopyPropertyIfExists(shill::kModeProperty, shill_properties, properties);
CopyPropertyIfExists(shill::kONCSourceProperty, shill_properties, properties);
CopyPropertyIfExists(shill::kWifiHiddenSsid, shill_properties, properties);
NetworkHandler::Get()
->network_configuration_handler()
->CreateShillConfiguration(
std::move(properties),
base::BindOnce(
&KioskNetworkStateObserver::OnCreatedShillConfigSuccess,
weak_ptr_factory_.GetWeakPtr()),
base::BindOnce(
&KioskNetworkStateObserver::OnCreatedShillConfigFailure,
weak_ptr_factory_.GetWeakPtr()));
}
void KioskNetworkStateObserver::OnCreatedShillConfigSuccess(
const std::string&,
const std::string&) {
NET_LOG(DEBUG)
<< "Active WiFi configuration is successfully copied to the device "
"level settings.";
// Copy only the first active wifi configuration.
StopActiveWifiExposureProcess();
MaybeRunWifiExposureAttemptCallback(true);
}
void KioskNetworkStateObserver::OnCreatedShillConfigFailure(
const std::string& error) {
if (error == kConfigFailureTemporaryServiceConfiguredButNotUsable) {
// The service is moved to the default profile, which means the successful
// WiFi scope change.
OnCreatedShillConfigSuccess("", "");
return;
}
NET_LOG(ERROR) << "Shill config failure: " << error;
FailCurrentAttempt();
}
void KioskNetworkStateObserver::PolicyChanged() {
if (IsPolicyEnabled()) {
StartActiveWifiExposureProcess();
} else {
StopActiveWifiExposureProcess();
}
}
void KioskNetworkStateObserver::FailCurrentAttempt() {
// We set `active_wifi_exposed_` to true when we attempt to expose the active
// WiFi. If the attempt fails, we need to reset it.
active_wifi_exposed_ = false;
if (++wifi_exposure_attempts_ >= kMaxWifiExposureAttempts) {
StopActiveWifiExposureProcess();
}
MaybeRunWifiExposureAttemptCallback(false);
}
void KioskNetworkStateObserver::MaybeRunWifiExposureAttemptCallback(
bool is_successful_attempt) {
if (wifi_exposure_attempt_callback_) {
wifi_exposure_attempt_callback_.Run(is_successful_attempt);
}
}
} // namespace ash
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