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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef NET_BASE_NETWORK_CHANGE_NOTIFIER_MAC_H_
      6 #define NET_BASE_NETWORK_CHANGE_NOTIFIER_MAC_H_
      7 
      8 #include <SystemConfiguration/SystemConfiguration.h>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/compiler_specific.h"
     12 #include "base/mac/scoped_cftyperef.h"
     13 #include "base/memory/scoped_ptr.h"
     14 #include "base/synchronization/condition_variable.h"
     15 #include "base/synchronization/lock.h"
     16 #include "net/base/network_change_notifier.h"
     17 #include "net/base/network_config_watcher_mac.h"
     18 
     19 namespace net {
     20 
     21 class NetworkChangeNotifierMac: public NetworkChangeNotifier {
     22  public:
     23   NetworkChangeNotifierMac();
     24   virtual ~NetworkChangeNotifierMac();
     25 
     26   // NetworkChangeNotifier implementation:
     27   virtual ConnectionType GetCurrentConnectionType() const OVERRIDE;
     28 
     29   // Forwarder just exists to keep the NetworkConfigWatcherMac API out of
     30   // NetworkChangeNotifierMac's public API.
     31   class Forwarder : public NetworkConfigWatcherMac::Delegate {
     32    public:
     33     explicit Forwarder(NetworkChangeNotifierMac* net_config_watcher)
     34         : net_config_watcher_(net_config_watcher) {}
     35 
     36     // NetworkConfigWatcherMac::Delegate implementation:
     37     virtual void Init() OVERRIDE;
     38     virtual void StartReachabilityNotifications() OVERRIDE;
     39     virtual void SetDynamicStoreNotificationKeys(
     40         SCDynamicStoreRef store) OVERRIDE;
     41     virtual void OnNetworkConfigChange(CFArrayRef changed_keys) OVERRIDE;
     42 
     43    private:
     44     NetworkChangeNotifierMac* const net_config_watcher_;
     45     DISALLOW_COPY_AND_ASSIGN(Forwarder);
     46   };
     47 
     48  private:
     49   class DnsConfigServiceThread;
     50 
     51   // Methods directly called by the NetworkConfigWatcherMac::Delegate:
     52   void StartReachabilityNotifications();
     53   void SetDynamicStoreNotificationKeys(SCDynamicStoreRef store);
     54   void OnNetworkConfigChange(CFArrayRef changed_keys);
     55 
     56   void SetInitialConnectionType();
     57 
     58   static void ReachabilityCallback(SCNetworkReachabilityRef target,
     59                                    SCNetworkConnectionFlags flags,
     60                                    void* notifier);
     61 
     62   static NetworkChangeCalculatorParams NetworkChangeCalculatorParamsMac();
     63 
     64   // These must be constructed before config_watcher_ to ensure
     65   // the lock is in a valid state when Forwarder::Init is called.
     66   ConnectionType connection_type_;
     67   bool connection_type_initialized_;
     68   mutable base::Lock connection_type_lock_;
     69   mutable base::ConditionVariable initial_connection_type_cv_;
     70   base::ScopedCFTypeRef<SCNetworkReachabilityRef> reachability_;
     71   base::ScopedCFTypeRef<CFRunLoopRef> run_loop_;
     72 
     73   Forwarder forwarder_;
     74   scoped_ptr<const NetworkConfigWatcherMac> config_watcher_;
     75 
     76   scoped_ptr<DnsConfigServiceThread> dns_config_service_thread_;
     77 
     78   DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierMac);
     79 };
     80 
     81 }  // namespace net
     82 
     83 #endif  // NET_BASE_NETWORK_CHANGE_NOTIFIER_MAC_H_
     84