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      1 // Copyright (c) 2013 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 CHROME_BROWSER_METRICS_METRICS_NETWORK_OBSERVER_H_
      6 #define CHROME_BROWSER_METRICS_METRICS_NETWORK_OBSERVER_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "base/memory/weak_ptr.h"
     11 #include "chrome/common/metrics/proto/system_profile.pb.h"
     12 #include "net/base/net_util.h"
     13 #include "net/base/network_change_notifier.h"
     14 
     15 using metrics::SystemProfileProto;
     16 
     17 // Registers as observer with net::NetworkChangeNotifier and keeps track of
     18 // the network environment.
     19 class MetricsNetworkObserver
     20     : public net::NetworkChangeNotifier::ConnectionTypeObserver {
     21  public:
     22   MetricsNetworkObserver();
     23   virtual ~MetricsNetworkObserver();
     24 
     25   // Resets the "ambiguous" flags. Call when the environment is recorded.
     26   void Reset();
     27 
     28   // ConnectionTypeObserver:
     29   virtual void OnConnectionTypeChanged(
     30       net::NetworkChangeNotifier::ConnectionType type) OVERRIDE;
     31 
     32   bool connection_type_is_ambiguous() const {
     33     return connection_type_is_ambiguous_;
     34   }
     35 
     36   SystemProfileProto::Network::ConnectionType connection_type() const;
     37 
     38   bool wifi_phy_layer_protocol_is_ambiguous() const {
     39     return wifi_phy_layer_protocol_is_ambiguous_;
     40   }
     41 
     42   SystemProfileProto::Network::WifiPHYLayerProtocol
     43   wifi_phy_layer_protocol() const;
     44 
     45  private:
     46   // Posts a call to net::GetWifiPHYLayerProtocol on the blocking pool.
     47   void ProbeWifiPHYLayerProtocol();
     48   // Callback from the blocking pool with the result of
     49   // net::GetWifiPHYLayerProtocol.
     50   void OnWifiPHYLayerProtocolResult(net::WifiPHYLayerProtocol mode);
     51 
     52   base::WeakPtrFactory<MetricsNetworkObserver> weak_ptr_factory_;
     53 
     54   // True if |connection_type_| changed during the lifetime of the log.
     55   bool connection_type_is_ambiguous_;
     56   // The connection type according to net::NetworkChangeNotifier.
     57   net::NetworkChangeNotifier::ConnectionType connection_type_;
     58 
     59   // True if |wifi_phy_layer_protocol_| changed during the lifetime of the log.
     60   bool wifi_phy_layer_protocol_is_ambiguous_;
     61   // The PHY mode of the currently associated access point obtained via
     62   // net::GetWifiPHYLayerProtocol.
     63   net::WifiPHYLayerProtocol wifi_phy_layer_protocol_;
     64 
     65   DISALLOW_COPY_AND_ASSIGN(MetricsNetworkObserver);
     66 };
     67 
     68 #endif  // CHROME_BROWSER_METRICS_METRICS_NETWORK_OBSERVER_H_
     69