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// Copyright 2014 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 "chromeos/network/auto_connect_handler.h"
#include <string>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/location.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/values.h"
#include "chromeos/dbus/dbus_thread_manager.h"
#include "chromeos/dbus/shill_manager_client.h"
#include "chromeos/dbus/shill_service_client.h"
#include "chromeos/network/device_state.h"
#include "chromeos/network/managed_network_configuration_handler.h"
#include "chromeos/network/network_connection_handler.h"
#include "chromeos/network/network_event_log.h"
#include "chromeos/network/network_state.h"
#include "chromeos/network/network_type_pattern.h"
#include "dbus/object_path.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace chromeos {
AutoConnectHandler::AutoConnectHandler()
: client_cert_resolver_(nullptr),
request_best_connection_pending_(false),
device_policy_applied_(false),
user_policy_applied_(false),
client_certs_resolved_(false),
applied_autoconnect_policy_(false),
connect_to_best_services_after_scan_(false),
weak_ptr_factory_(this) {
}
AutoConnectHandler::~AutoConnectHandler() {
if (client_cert_resolver_)
client_cert_resolver_->RemoveObserver(this);
if (LoginState::IsInitialized())
LoginState::Get()->RemoveObserver(this);
if (network_state_handler_)
network_state_handler_->RemoveObserver(this, FROM_HERE);
if (managed_configuration_handler_)
managed_configuration_handler_->RemoveObserver(this);
}
void AutoConnectHandler::Init(
ClientCertResolver* client_cert_resolver,
NetworkConnectionHandler* network_connection_handler,
NetworkStateHandler* network_state_handler,
ManagedNetworkConfigurationHandler* managed_network_configuration_handler) {
if (LoginState::IsInitialized())
LoginState::Get()->AddObserver(this);
client_cert_resolver_ = client_cert_resolver;
if (client_cert_resolver_)
client_cert_resolver_->AddObserver(this);
network_connection_handler_ = network_connection_handler;
if (network_connection_handler_)
network_connection_handler_->AddObserver(this);
network_state_handler_ = network_state_handler;
if (network_state_handler_)
network_state_handler_->AddObserver(this, FROM_HERE);
managed_configuration_handler_ = managed_network_configuration_handler;
if (managed_configuration_handler_)
managed_configuration_handler_->AddObserver(this);
if (LoginState::IsInitialized())
LoggedInStateChanged();
}
void AutoConnectHandler::LoggedInStateChanged() {
if (!LoginState::Get()->IsUserLoggedIn())
return;
// Disconnect before connecting, to ensure that we do not disconnect a network
// that we just connected.
DisconnectIfPolicyRequires();
NET_LOG_DEBUG("RequestBestConnection", "User logged in");
RequestBestConnection();
}
void AutoConnectHandler::ConnectToNetworkRequested(
const std::string& /*service_path*/) {
// Stop any pending request to connect to the best newtork.
request_best_connection_pending_ = false;
}
void AutoConnectHandler::PoliciesChanged(const std::string& userhash) {
// Ignore user policies.
if (!userhash.empty())
return;
DisconnectIfPolicyRequires();
}
void AutoConnectHandler::PoliciesApplied(const std::string& userhash) {
if (userhash.empty())
device_policy_applied_ = true;
else
user_policy_applied_ = true;
// Request to connect to the best network only if there is at least one
// managed network. Otherwise only process existing requests.
const ManagedNetworkConfigurationHandler::GuidToPolicyMap* managed_networks =
managed_configuration_handler_->GetNetworkConfigsFromPolicy(userhash);
DCHECK(managed_networks);
if (!managed_networks->empty()) {
NET_LOG_DEBUG("RequestBestConnection", "Policy applied");
RequestBestConnection();
} else {
CheckBestConnection();
}
}
void AutoConnectHandler::ScanCompleted(const DeviceState* device) {
if (!connect_to_best_services_after_scan_ ||
device->type() != shill::kTypeWifi) {
return;
}
connect_to_best_services_after_scan_ = false;
// Request ConnectToBestServices after processing any pending DBus calls.
base::MessageLoopProxy::current()->PostTask(
FROM_HERE, base::Bind(&AutoConnectHandler::CallShillConnectToBestServices,
weak_ptr_factory_.GetWeakPtr()));
}
void AutoConnectHandler::ResolveRequestCompleted(
bool network_properties_changed) {
client_certs_resolved_ = true;
// Only request to connect to the best network if network properties were
// actually changed. Otherwise only process existing requests.
if (network_properties_changed) {
NET_LOG_DEBUG("RequestBestConnection",
"Client certificate patterns resolved");
RequestBestConnection();
} else {
CheckBestConnection();
}
}
void AutoConnectHandler::RequestBestConnection() {
request_best_connection_pending_ = true;
CheckBestConnection();
}
void AutoConnectHandler::CheckBestConnection() {
// Return immediately if there is currently no request pending to change to
// the best network.
if (!request_best_connection_pending_)
return;
bool policy_application_running =
managed_configuration_handler_->IsAnyPolicyApplicationRunning();
bool client_cert_resolve_task_running =
client_cert_resolver_->IsAnyResolveTaskRunning();
VLOG(2) << "device policy applied: " << device_policy_applied_
<< "\nuser policy applied: " << user_policy_applied_
<< "\npolicy application running: " << policy_application_running
<< "\nclient cert patterns resolved: " << client_certs_resolved_
<< "\nclient cert resolve task running: "
<< client_cert_resolve_task_running;
if (!device_policy_applied_ || policy_application_running ||
client_cert_resolve_task_running) {
return;
}
if (LoginState::Get()->IsUserLoggedIn()) {
// Before changing connection after login, we wait at least for:
// - user policy applied at least once
// - client certificate patterns resolved
if (!user_policy_applied_ || !client_certs_resolved_)
return;
}
request_best_connection_pending_ = false;
// Trigger a ConnectToBestNetwork request after the next scan completion.
// Note: there is an edge case here if a scan is in progress and a hidden
// network has been configured since the scan started. crbug.com/433075.
if (connect_to_best_services_after_scan_)
return;
connect_to_best_services_after_scan_ = true;
if (!network_state_handler_->GetScanningByType(
NetworkTypePattern::Primitive(shill::kTypeWifi))) {
network_state_handler_->RequestScan();
}
}
void AutoConnectHandler::DisconnectIfPolicyRequires() {
if (applied_autoconnect_policy_ || !LoginState::Get()->IsUserLoggedIn())
return;
const base::DictionaryValue* global_network_config =
managed_configuration_handler_->GetGlobalConfigFromPolicy(
std::string() /* no username hash, device policy */);
if (!global_network_config)
return; // Device policy is not set, yet.
applied_autoconnect_policy_ = true;
bool only_policy_autoconnect = false;
global_network_config->GetBooleanWithoutPathExpansion(
::onc::global_network_config::kAllowOnlyPolicyNetworksToAutoconnect,
&only_policy_autoconnect);
if (only_policy_autoconnect)
DisconnectFromUnmanagedSharedWiFiNetworks();
}
void AutoConnectHandler::DisconnectFromUnmanagedSharedWiFiNetworks() {
NET_LOG_DEBUG("DisconnectFromUnmanagedSharedWiFiNetworks", "");
NetworkStateHandler::NetworkStateList networks;
network_state_handler_->GetVisibleNetworkListByType(
NetworkTypePattern::Wireless(), &networks);
for (const NetworkState* network : networks) {
if (!(network->IsConnectingState() || network->IsConnectedState()))
break; // Connected and connecting networks are listed first.
if (network->IsPrivate())
continue;
const bool network_is_policy_managed =
!network->profile_path().empty() && !network->guid().empty() &&
managed_configuration_handler_->FindPolicyByGuidAndProfile(
network->guid(), network->profile_path());
if (network_is_policy_managed)
continue;
NET_LOG_EVENT("Disconnect Forced by Policy", network->path());
DBusThreadManager::Get()->GetShillServiceClient()->Disconnect(
dbus::ObjectPath(network->path()), base::Bind(&base::DoNothing),
base::Bind(&network_handler::ShillErrorCallbackFunction,
"AutoConnectHandler.Disconnect failed", network->path(),
network_handler::ErrorCallback()));
}
}
void AutoConnectHandler::CallShillConnectToBestServices() const {
NET_LOG_EVENT("ConnectToBestServices", "");
DBusThreadManager::Get()->GetShillManagerClient()->ConnectToBestServices(
base::Bind(&base::DoNothing),
base::Bind(&network_handler::ShillErrorCallbackFunction,
"ConnectToBestServices Failed",
"", network_handler::ErrorCallback()));
}
} // namespace chromeos
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