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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/webui/chromeos/login/network_state_informer.h"
#include "base/bind.h"
#include "base/logging.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/browser_process_platform_part.h"
#include "chrome/browser/chromeos/login/screens/network_error.h"
#include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
#include "chromeos/network/network_state.h"
#include "chromeos/network/network_state_handler.h"
#include "chromeos/network/proxy/proxy_config_handler.h"
#include "chromeos/network/proxy/ui_proxy_config_service.h"
#include "components/proxy_config/proxy_config_dictionary.h"
#include "components/proxy_config/proxy_prefs.h"
#include "net/proxy_resolution/proxy_config.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace chromeos {
namespace {
const char kNetworkStateOffline[] = "offline";
const char kNetworkStateOnline[] = "online";
const char kNetworkStateCaptivePortal[] = "behind captive portal";
const char kNetworkStateConnecting[] = "connecting";
const char kNetworkStateProxyAuthRequired[] = "proxy auth required";
NetworkStateInformer::State GetStateForDefaultNetwork() {
const NetworkState* network =
NetworkHandler::Get()->network_state_handler()->DefaultNetwork();
if (!network)
return NetworkStateInformer::OFFLINE;
if (network_portal_detector::GetInstance()->IsEnabled()) {
NetworkPortalDetector::CaptivePortalState state =
network_portal_detector::GetInstance()->GetCaptivePortalState(
network->guid());
NetworkPortalDetector::CaptivePortalStatus status = state.status;
if (status == NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_UNKNOWN &&
NetworkState::StateIsConnecting(network->connection_state())) {
return NetworkStateInformer::CONNECTING;
}
// For proxy-less networks rely on shill's online state if
// NetworkPortalDetector's state of current network is unknown.
if (status == NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_ONLINE ||
(status == NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_UNKNOWN &&
!NetworkHandler::Get()
->ui_proxy_config_service()
->HasDefaultNetworkProxyConfigured() &&
network->connection_state() == shill::kStateOnline)) {
return NetworkStateInformer::ONLINE;
}
if (status ==
NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_PROXY_AUTH_REQUIRED &&
NetworkHandler::Get()
->ui_proxy_config_service()
->HasDefaultNetworkProxyConfigured()) {
return NetworkStateInformer::PROXY_AUTH_REQUIRED;
}
if (status == NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_PORTAL ||
(status == NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_UNKNOWN &&
network->is_captive_portal()))
return NetworkStateInformer::CAPTIVE_PORTAL;
} else {
if (NetworkState::StateIsConnecting(network->connection_state()))
return NetworkStateInformer::CONNECTING;
if (network->connection_state() == shill::kStateOnline)
return NetworkStateInformer::ONLINE;
if (network->is_captive_portal())
return NetworkStateInformer::CAPTIVE_PORTAL;
}
// If there is no connection to the internet report it as online for the
// Active Directory devices. These devices does not have to be online to reach
// the server.
// TODO(rsorokin): Fix reporting network connectivity for Active Directory
// devices. (see crbug.com/685691)
policy::BrowserPolicyConnectorChromeOS* connector =
g_browser_process->platform_part()->browser_policy_connector_chromeos();
if (connector->IsActiveDirectoryManaged())
return NetworkStateInformer::ONLINE;
return NetworkStateInformer::OFFLINE;
}
} // namespace
NetworkStateInformer::NetworkStateInformer() : state_(OFFLINE) {}
NetworkStateInformer::~NetworkStateInformer() {
if (NetworkHandler::IsInitialized()) {
NetworkHandler::Get()->network_state_handler()->RemoveObserver(
this, FROM_HERE);
}
network_portal_detector::GetInstance()->RemoveObserver(this);
}
void NetworkStateInformer::Init() {
UpdateState();
NetworkHandler::Get()->network_state_handler()->AddObserver(
this, FROM_HERE);
network_portal_detector::GetInstance()->AddAndFireObserver(this);
}
void NetworkStateInformer::AddObserver(NetworkStateInformerObserver* observer) {
if (!observers_.HasObserver(observer))
observers_.AddObserver(observer);
}
void NetworkStateInformer::RemoveObserver(
NetworkStateInformerObserver* observer) {
observers_.RemoveObserver(observer);
}
void NetworkStateInformer::DefaultNetworkChanged(const NetworkState* network) {
UpdateStateAndNotify();
}
void NetworkStateInformer::OnPortalDetectionCompleted(
const NetworkState* network,
const NetworkPortalDetector::CaptivePortalState& state) {
UpdateStateAndNotify();
}
void NetworkStateInformer::OnPortalDetected() {
UpdateStateAndNotify();
}
// static
const char* NetworkStateInformer::StatusString(State state) {
switch (state) {
case OFFLINE:
return kNetworkStateOffline;
case ONLINE:
return kNetworkStateOnline;
case CAPTIVE_PORTAL:
return kNetworkStateCaptivePortal;
case CONNECTING:
return kNetworkStateConnecting;
case PROXY_AUTH_REQUIRED:
return kNetworkStateProxyAuthRequired;
default:
NOTREACHED();
return NULL;
}
}
bool NetworkStateInformer::UpdateState() {
const NetworkState* default_network =
NetworkHandler::Get()->network_state_handler()->DefaultNetwork();
State new_state = GetStateForDefaultNetwork();
std::string new_network_path;
if (default_network)
new_network_path = default_network->path();
if (new_state == state_ && new_network_path == network_path_)
return false;
state_ = new_state;
network_path_ = new_network_path;
proxy_config_.reset();
if (state_ == ONLINE) {
for (NetworkStateInformerObserver& observer : observers_)
observer.OnNetworkReady();
}
return true;
}
bool NetworkStateInformer::UpdateProxyConfig() {
const NetworkState* default_network =
NetworkHandler::Get()->network_state_handler()->DefaultNetwork();
if (!default_network || !default_network->proxy_config())
return false;
if (proxy_config_ && *proxy_config_ == *default_network->proxy_config())
return false;
proxy_config_ =
std::make_unique<base::Value>(default_network->proxy_config()->Clone());
return true;
}
void NetworkStateInformer::UpdateStateAndNotify() {
bool state_changed = UpdateState();
bool proxy_config_changed = UpdateProxyConfig();
if (state_changed)
SendStateToObservers(NetworkError::ERROR_REASON_NETWORK_STATE_CHANGED);
else if (proxy_config_changed)
SendStateToObservers(NetworkError::ERROR_REASON_PROXY_CONFIG_CHANGED);
else
SendStateToObservers(NetworkError::ERROR_REASON_UPDATE);
}
void NetworkStateInformer::SendStateToObservers(
NetworkError::ErrorReason reason) {
for (NetworkStateInformerObserver& observer : observers_)
observer.UpdateState(reason);
}
} // namespace chromeos
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