15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef NET_BASE_NETWORK_CHANGE_NOTIFIER_WIN_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NET_BASE_NETWORK_CHANGE_NOTIFIER_WIN_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <windows.h> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/basictypes.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/compiler_specific.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/memory/scoped_ptr.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/memory/weak_ptr.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/threading/non_thread_safe.h" 15eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "base/timer/timer.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/win/object_watcher.h" 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/base/net_export.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/base/network_change_notifier.h" 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace net { 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// NetworkChangeNotifierWin inherits from NonThreadSafe, as all its internal 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// notification code must be called on the thread it is created and destroyed 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// on. All the NetworkChangeNotifier methods it implements are threadsafe. 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class NET_EXPORT_PRIVATE NetworkChangeNotifierWin 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : public NetworkChangeNotifier, 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public base::win::ObjectWatcher::Delegate, 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NON_EXPORTED_BASE(public base::NonThreadSafe) { 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NetworkChangeNotifierWin(); 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Begins listening for a single subsequent address change. If it fails to 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // start watching, it retries on a timer. Must be called only once, on the 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // thread |this| was created on. This cannot be called in the constructor, as 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // WatchForAddressChangeInternal is mocked out in unit tests. 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // TODO(mmenke): Consider making this function a part of the 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NetworkChangeNotifier interface, so other subclasses can be 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // unit tested in similar fashion, as needed. 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void WatchForAddressChange(); 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) protected: 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~NetworkChangeNotifierWin(); 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // For unit tests only. 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool is_watching() { return is_watching_; } 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void set_is_watching(bool is_watching) { is_watching_ = is_watching; } 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int sequential_failures() { return sequential_failures_; } 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class DnsConfigServiceThread; 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) friend class NetworkChangeNotifierWinTest; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NetworkChangeNotifier methods: 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ConnectionType GetCurrentConnectionType() const OVERRIDE; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // ObjectWatcher::Delegate methods: 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Must only be called on the thread |this| was created on. 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void OnObjectSignaled(HANDLE object) OVERRIDE; 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Notifies IP address change observers of a change immediately, and notifies 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // network state change observers on a delay. Must only be called on the 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // thread |this| was created on. 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void NotifyObservers(); 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Forwards connection type notifications to parent class. 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void NotifyParentOfConnectionTypeChange(); 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Tries to start listening for a single subsequent address change. Returns 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // false on failure. The caller is responsible for updating |is_watching_|. 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Virtual for unit tests. Must only be called on the thread |this| was 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // created on. 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual bool WatchForAddressChangeInternal(); 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) static NetworkChangeCalculatorParams NetworkChangeCalculatorParamsWin(); 752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // All member variables may only be accessed on the thread |this| was created 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // on. 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // False when not currently watching for network change events. This only 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // happens on initialization and when WatchForAddressChangeInternal fails and 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // there is a pending task to try again. Needed for safe cleanup. 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool is_watching_; 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::win::ObjectWatcher addr_watcher_; 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OVERLAPPED addr_overlapped_; 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::OneShotTimer<NetworkChangeNotifierWin> timer_; 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Number of times WatchForAddressChange has failed in a row. 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int sequential_failures_; 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Used for calling WatchForAddressChange again on failure. 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::WeakPtrFactory<NetworkChangeNotifierWin> weak_factory_; 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Thread on which we can run DnsConfigService. 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scoped_ptr<DnsConfigServiceThread> dns_config_service_thread_; 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Result of IsOffline() when NotifyObserversOfConnectionTypeChange() 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // was last called. 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool last_announced_offline_; 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Number of times polled to check if still offline. 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int offline_polls_; 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierWin); 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace net 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // NET_BASE_NETWORK_CHANGE_NOTIFIER_WIN_H_ 110