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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 <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/prefs/pref_change_registrar.h"
#include "chromeos/network/network_state_handler_observer.h"
#include "components/onc/onc_constants.h"
#include "components/proxy_config/pref_proxy_config_tracker_impl.h"
namespace chromeos {
class NetworkState;
// Implementation of proxy config service for chromeos that:
// - extends PrefProxyConfigTrackerImpl (and so lives and runs entirely on UI
// thread) to handle proxy from prefs (via PrefProxyConfigTrackerImpl) and
// system i.e. network (via shill notifications)
// - exists one per profile and one per local state
// - persists proxy setting per network in flimflim
// - provides network stack with latest effective proxy configuration for
// currently active network via PrefProxyConfigTrackerImpl's mechanism of
// pushing config to ChromeProxyConfigService
class ProxyConfigServiceImpl : public PrefProxyConfigTrackerImpl,
public NetworkStateHandlerObserver {
// ProxyConfigServiceImpl is created in ProxyServiceFactory::
// CreatePrefProxyConfigTrackerImpl via Profile::GetProxyConfigTracker() for
// profile or via IOThread constructor for local state and is owned by the
// respective classes.
// The user's proxy config, proxy policies and proxy from prefs, are used to
// determine the effective proxy config, which is then pushed through
// PrefProxyConfigTrackerImpl to ChromeProxyConfigService to the
// network stack.
// |profile_prefs| can be NULL if this object should only track prefs from
// local state (e.g., for system request context or sigin-in screen).
explicit ProxyConfigServiceImpl(PrefService* profile_prefs,
PrefService* local_state_prefs);
~ProxyConfigServiceImpl() override;
// PrefProxyConfigTrackerImpl implementation.
void OnProxyConfigChanged(ProxyPrefs::ConfigState config_state,
const net::ProxyConfig& config) override;
// NetworkStateHandlerObserver implementation.
void DefaultNetworkChanged(const NetworkState* network) override;
friend class UIProxyConfigService;
// Returns true if proxy is to be ignored for this network profile and
// |onc_source|, e.g. this happens if the network is shared and
// use-shared-proxies is turned off. |profile_prefs| may be NULL.
static bool IgnoreProxy(const PrefService* profile_prefs,
const std::string network_profile_path,
onc::ONCSource onc_source);
// Called when any proxy preference changes.
void OnProxyPrefChanged();
// Determines effective proxy config based on prefs from config tracker, the
// current default network and if user is using shared proxies. The effective
// config is stored in |active_config_| and activated on network stack, and
// hence, picked up by observers.
void DetermineEffectiveConfigFromDefaultNetwork();
// State of |active_config_|. |active_config_| is only valid if
// |active_config_state_| is not ProxyPrefs::CONFIG_UNSET.
ProxyPrefs::ConfigState active_config_state_;
// Active proxy configuration, which could be from prefs or network.
net::ProxyConfig active_config_;
// Track changes in profile preferences: UseSharedProxies and
// OpenNetworkConfiguration.
PrefChangeRegistrar profile_pref_registrar_;
// Track changes in local state preferences: DeviceOpenNetworkConfiguration.
PrefChangeRegistrar local_state_pref_registrar_;
// Not owned. NULL if tracking only local state prefs (e.g. in the system
// request context or sign-in screen).
PrefService* profile_prefs_;
// Not owned.
PrefService* local_state_prefs_;
base::WeakPtrFactory<ProxyConfigServiceImpl> pointer_factory_;
} // namespace chromeos