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      1 // Copyright 2014 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 #include "chrome/browser/metrics/network_metrics_provider.h"
      6 
      7 #include "base/compiler_specific.h"
      8 #include "base/task_runner_util.h"
      9 #include "base/threading/sequenced_worker_pool.h"
     10 #include "content/public/browser/browser_thread.h"
     11 
     12 using metrics::SystemProfileProto;
     13 
     14 NetworkMetricsProvider::NetworkMetricsProvider()
     15     : connection_type_is_ambiguous_(false),
     16       wifi_phy_layer_protocol_is_ambiguous_(false),
     17       wifi_phy_layer_protocol_(net::WIFI_PHY_LAYER_PROTOCOL_UNKNOWN),
     18       weak_ptr_factory_(this) {
     19   net::NetworkChangeNotifier::AddConnectionTypeObserver(this);
     20   connection_type_ = net::NetworkChangeNotifier::GetConnectionType();
     21   ProbeWifiPHYLayerProtocol();
     22 }
     23 
     24 NetworkMetricsProvider::~NetworkMetricsProvider() {
     25   net::NetworkChangeNotifier::RemoveConnectionTypeObserver(this);
     26 }
     27 
     28 void NetworkMetricsProvider::ProvideSystemProfileMetrics(
     29     SystemProfileProto* system_profile) {
     30   SystemProfileProto::Network* network = system_profile->mutable_network();
     31   network->set_connection_type_is_ambiguous(connection_type_is_ambiguous_);
     32   network->set_connection_type(GetConnectionType());
     33   network->set_wifi_phy_layer_protocol_is_ambiguous(
     34       wifi_phy_layer_protocol_is_ambiguous_);
     35   network->set_wifi_phy_layer_protocol(GetWifiPHYLayerProtocol());
     36 
     37   // Resets the "ambiguous" flags, since a new metrics log session has started.
     38   connection_type_is_ambiguous_ = false;
     39   // TODO(isherman): This line seems unnecessary.
     40   connection_type_ = net::NetworkChangeNotifier::GetConnectionType();
     41   wifi_phy_layer_protocol_is_ambiguous_ = false;
     42 }
     43 
     44 void NetworkMetricsProvider::OnConnectionTypeChanged(
     45     net::NetworkChangeNotifier::ConnectionType type) {
     46   if (type == net::NetworkChangeNotifier::CONNECTION_NONE)
     47     return;
     48   if (type != connection_type_ &&
     49       connection_type_ != net::NetworkChangeNotifier::CONNECTION_NONE) {
     50     connection_type_is_ambiguous_ = true;
     51   }
     52   connection_type_ = type;
     53 
     54   ProbeWifiPHYLayerProtocol();
     55 }
     56 
     57 SystemProfileProto::Network::ConnectionType
     58 NetworkMetricsProvider::GetConnectionType() const {
     59   switch (connection_type_) {
     60     case net::NetworkChangeNotifier::CONNECTION_NONE:
     61     case net::NetworkChangeNotifier::CONNECTION_UNKNOWN:
     62       return SystemProfileProto::Network::CONNECTION_UNKNOWN;
     63     case net::NetworkChangeNotifier::CONNECTION_ETHERNET:
     64       return SystemProfileProto::Network::CONNECTION_ETHERNET;
     65     case net::NetworkChangeNotifier::CONNECTION_WIFI:
     66       return SystemProfileProto::Network::CONNECTION_WIFI;
     67     case net::NetworkChangeNotifier::CONNECTION_2G:
     68       return SystemProfileProto::Network::CONNECTION_2G;
     69     case net::NetworkChangeNotifier::CONNECTION_3G:
     70       return SystemProfileProto::Network::CONNECTION_3G;
     71     case net::NetworkChangeNotifier::CONNECTION_4G:
     72       return SystemProfileProto::Network::CONNECTION_4G;
     73     case net::NetworkChangeNotifier::CONNECTION_BLUETOOTH:
     74       return SystemProfileProto::Network::CONNECTION_BLUETOOTH;
     75   }
     76   NOTREACHED();
     77   return SystemProfileProto::Network::CONNECTION_UNKNOWN;
     78 }
     79 
     80 SystemProfileProto::Network::WifiPHYLayerProtocol
     81 NetworkMetricsProvider::GetWifiPHYLayerProtocol() const {
     82   switch (wifi_phy_layer_protocol_) {
     83     case net::WIFI_PHY_LAYER_PROTOCOL_NONE:
     84       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_NONE;
     85     case net::WIFI_PHY_LAYER_PROTOCOL_ANCIENT:
     86       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_ANCIENT;
     87     case net::WIFI_PHY_LAYER_PROTOCOL_A:
     88       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_A;
     89     case net::WIFI_PHY_LAYER_PROTOCOL_B:
     90       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_B;
     91     case net::WIFI_PHY_LAYER_PROTOCOL_G:
     92       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_G;
     93     case net::WIFI_PHY_LAYER_PROTOCOL_N:
     94       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_N;
     95     case net::WIFI_PHY_LAYER_PROTOCOL_UNKNOWN:
     96       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_UNKNOWN;
     97   }
     98   NOTREACHED();
     99   return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_UNKNOWN;
    100 }
    101 
    102 void NetworkMetricsProvider::ProbeWifiPHYLayerProtocol() {
    103   PostTaskAndReplyWithResult(
    104       content::BrowserThread::GetBlockingPool(),
    105       FROM_HERE,
    106       base::Bind(&net::GetWifiPHYLayerProtocol),
    107       base::Bind(&NetworkMetricsProvider::OnWifiPHYLayerProtocolResult,
    108                  weak_ptr_factory_.GetWeakPtr()));
    109 }
    110 
    111 void NetworkMetricsProvider::OnWifiPHYLayerProtocolResult(
    112     net::WifiPHYLayerProtocol mode) {
    113   if (wifi_phy_layer_protocol_ != net::WIFI_PHY_LAYER_PROTOCOL_UNKNOWN &&
    114       mode != wifi_phy_layer_protocol_) {
    115     wifi_phy_layer_protocol_is_ambiguous_ = true;
    116   }
    117   wifi_phy_layer_protocol_ = mode;
    118 }
    119