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// Copyright (c) 2011 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/chromeos/net/network_change_notifier_chromeos.h"
#include "base/task.h"
#include "chrome/browser/chromeos/cros/cros_library.h"
#include "content/browser/browser_thread.h"
namespace {
// Delay for online change notification reporting.
const int kOnlineNotificationDelayMS = 500;
const int kInitialNotificationCheckDelayMS = 1000;
bool IsOnline(chromeos::ConnectionState state) {
return state == chromeos::STATE_ONLINE ||
state == chromeos::STATE_PORTAL;
}
}
namespace chromeos {
// Task for fetching tokens from UI thread.
class OnlineStatusReportThreadTask : public CancelableTask {
public:
OnlineStatusReportThreadTask(NetworkChangeNotifierChromeos* parent,
bool is_online)
: parent_(parent), is_online_(is_online), should_report_(true) {}
virtual ~OnlineStatusReportThreadTask() {}
// CancelableTask overrides.
virtual void Cancel() {
// Normally called from UI thread unless called during shutdown.
should_report_ = false;
}
virtual void Run() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (!should_report_)
return;
DVLOG(1) << "OnlineStatusReportThreadTask: firing notification!";
parent_->OnOnlineStateNotificationFired();
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
NewRunnableFunction(
&NetworkChangeNotifierChromeos::NotifyObserversOfOnlineStateChange));
}
bool is_online() { return is_online_; }
private:
NetworkChangeNotifierChromeos* parent_;
bool is_online_;
bool should_report_;
};
NetworkChangeNotifierChromeos::NetworkChangeNotifierChromeos()
: has_active_network_(false),
connection_state_(chromeos::STATE_UNKNOWN),
online_notification_task_(NULL) {
chromeos::NetworkLibrary* net =
chromeos::CrosLibrary::Get()->GetNetworkLibrary();
net->AddNetworkManagerObserver(this);
chromeos::PowerLibrary* power =
chromeos::CrosLibrary::Get()->GetPowerLibrary();
power->AddObserver(this);
UpdateNetworkState(net);
BrowserThread::PostDelayedTask(
BrowserThread::UI, FROM_HERE,
NewRunnableFunction(
&NetworkChangeNotifierChromeos::UpdateInitialState, this),
kInitialNotificationCheckDelayMS);
}
NetworkChangeNotifierChromeos::~NetworkChangeNotifierChromeos() {
if (online_notification_task_) {
online_notification_task_->Cancel();
online_notification_task_ = NULL;
}
if (!chromeos::CrosLibrary::Get())
return;
chromeos::NetworkLibrary* lib =
chromeos::CrosLibrary::Get()->GetNetworkLibrary();
lib->RemoveNetworkManagerObserver(this);
lib->RemoveObserverForAllNetworks(this);
chromeos::PowerLibrary* power =
chromeos::CrosLibrary::Get()->GetPowerLibrary();
power->RemoveObserver(this);
}
void NetworkChangeNotifierChromeos::PowerChanged(PowerLibrary* obj) {
}
void NetworkChangeNotifierChromeos::SystemResumed() {
// Force invalidation of various net resources on system resume.
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
NewRunnableFunction(
&NetworkChangeNotifier::NotifyObserversOfIPAddressChange));
}
void NetworkChangeNotifierChromeos::OnNetworkManagerChanged(
chromeos::NetworkLibrary* cros) {
UpdateNetworkState(cros);
}
bool NetworkChangeNotifierChromeos::IsCurrentlyOffline() const {
return !IsOnline(connection_state_);
}
void NetworkChangeNotifierChromeos::OnNetworkChanged(
chromeos::NetworkLibrary* cros,
const chromeos::Network* network) {
CHECK(network);
// Active network changed?
if (network->service_path() != service_path_)
UpdateNetworkState(cros);
else
UpdateConnectivityState(network);
}
void NetworkChangeNotifierChromeos::UpdateNetworkState(
chromeos::NetworkLibrary* lib) {
const chromeos::Network* network = lib->active_network();
if (network) {
VLOG(2) << "UpdateNetworkState: type = "
<< network->type()
<< ", dev = "
<< network->device_path()
<< ", state_ = "
<< network->state();
}
// Check if active network was added, removed or changed.
if ((!network && has_active_network_) ||
(network && (!has_active_network_ ||
network->service_path() != service_path_ ||
network->ip_address() != ip_address_))) {
if (has_active_network_)
lib->RemoveObserverForAllNetworks(this);
if (!network) {
has_active_network_ = false;
service_path_.clear();
ip_address_.clear();
} else {
has_active_network_ = true;
service_path_ = network->service_path();
ip_address_ = network->ip_address();
}
UpdateConnectivityState(network);
// If there is an active network, add observer to track its changes.
if (network)
lib->AddNetworkObserver(network->service_path(), this);
DVLOG(1) << "NotifyObserversOfIPAddressChange!!";
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
NewRunnableFunction(
&NetworkChangeNotifier::NotifyObserversOfIPAddressChange));
}
}
void NetworkChangeNotifierChromeos::UpdateConnectivityState(
const chromeos::Network* network) {
if (network) {
VLOG(2) << "UpdateConnectivityState: nt = "
<< network->type()
<< ", dev = "
<< network->device_path()
<< ", ns = "
<< network->state()
<< ", cs_ = "
<< connection_state_;
}
// We don't care about all transitions of ConnectionState. OnlineStateChange
// notification should trigger if
// a) we were online and went offline
// b) we were offline and went online
// c) switched to/from captive portal
chromeos::ConnectionState new_connection_state =
network ? network->connection_state() : chromeos::STATE_UNKNOWN;
bool is_online = (new_connection_state == chromeos::STATE_ONLINE);
bool was_online = (connection_state_ == chromeos::STATE_ONLINE);
bool is_portal = (new_connection_state == chromeos::STATE_PORTAL);
bool was_portal = (connection_state_ == chromeos::STATE_PORTAL);
VLOG(2) << "UpdateConnectivityState: n_cs = "
<< new_connection_state
<< ", is_online = "
<< is_online
<< ", was_online = "
<< was_online
<< ", is_portal = "
<< is_portal
<< ", was_portal = "
<< was_portal;
connection_state_ = new_connection_state;
if (is_online != was_online || is_portal != was_portal) {
ReportOnlineStateChange(IsOnline(connection_state_));
}
VLOG(2) << "UpdateConnectivityState: new_cs = "
<< new_connection_state
<< ", end_cs_ = "
<< connection_state_;
}
void NetworkChangeNotifierChromeos::ReportOnlineStateChange(bool is_online) {
VLOG(2) << "ReportOnlineStateChange: "
<< (is_online ? "online" : "offline");
if (online_notification_task_) {
DVLOG(1) << "ReportOnlineStateChange: "
<< "has pending task";
// If we are trying to report the same state, just continue as planned.
// If the online state had changed since we queued the reporting task,
// then cancel it. This should help us avoid transient edge reporting
// while switching between connection types (i.e. wifi->ehternet).
if (is_online != online_notification_task_->is_online()) {
online_notification_task_->Cancel();
online_notification_task_ = NULL;
DVLOG(1) << "ReportOnlineStateChange: "
<< "canceled pending task";
}
return;
}
online_notification_task_ = new OnlineStatusReportThreadTask(this,
is_online);
BrowserThread::PostDelayedTask(
BrowserThread::UI, FROM_HERE,
online_notification_task_,
kOnlineNotificationDelayMS);
}
void NetworkChangeNotifierChromeos::OnOnlineStateNotificationFired() {
online_notification_task_ = NULL;
}
// static
void NetworkChangeNotifierChromeos::UpdateInitialState(
NetworkChangeNotifierChromeos* self) {
chromeos::NetworkLibrary* net =
chromeos::CrosLibrary::Get()->GetNetworkLibrary();
self->UpdateNetworkState(net);
}
} // namespace net
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