components/metrics/net/network_metrics_provider.cc

   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 "components/metrics/net/network_metrics_provider.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/strings/string_number_conversions.h"
  12 #include "base/strings/string_split.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/task_runner_util.h"
  15
  16 #if defined(OS_CHROMEOS)
  17 #include "components/metrics/net/wifi_access_point_info_provider_chromeos.h"
  18 #endif  // OS_CHROMEOS
  19
  20 namespace metrics {
  21
  22 NetworkMetricsProvider::NetworkMetricsProvider(
  23     base::TaskRunner* io_task_runner)
  24     : io_task_runner_(io_task_runner),
  25       connection_type_is_ambiguous_(false),
  26       wifi_phy_layer_protocol_is_ambiguous_(false),
  27       wifi_phy_layer_protocol_(net::WIFI_PHY_LAYER_PROTOCOL_UNKNOWN),
  28       weak_ptr_factory_(this) {
  29   net::NetworkChangeNotifier::AddConnectionTypeObserver(this);
  30   connection_type_ = net::NetworkChangeNotifier::GetConnectionType();
  31   ProbeWifiPHYLayerProtocol();
  32 }
  33
  34 NetworkMetricsProvider::~NetworkMetricsProvider() {
  35   net::NetworkChangeNotifier::RemoveConnectionTypeObserver(this);
  36 }
  37
  38 void NetworkMetricsProvider::OnDidCreateMetricsLog() {
  39   net::NetworkChangeNotifier::LogOperatorCodeHistogram(
  40       net::NetworkChangeNotifier::GetConnectionType());
  41 }
  42
  43 void NetworkMetricsProvider::ProvideSystemProfileMetrics(
  44     SystemProfileProto* system_profile) {
  45   SystemProfileProto::Network* network = system_profile->mutable_network();
  46   network->set_connection_type_is_ambiguous(connection_type_is_ambiguous_);
  47   network->set_connection_type(GetConnectionType());
  48   network->set_wifi_phy_layer_protocol_is_ambiguous(
  49       wifi_phy_layer_protocol_is_ambiguous_);
  50   network->set_wifi_phy_layer_protocol(GetWifiPHYLayerProtocol());
  51
  52   // Update the connection type. Note that this is necessary to set the network
  53   // type to "none" if there is no network connection for an entire UMA logging
  54   // window, since OnConnectionTypeChanged() ignores transitions to the "none"
  55   // state.
  56   connection_type_ = net::NetworkChangeNotifier::GetConnectionType();
  57   // Reset the "ambiguous" flags, since a new metrics log session has started.
  58   connection_type_is_ambiguous_ = false;
  59   wifi_phy_layer_protocol_is_ambiguous_ = false;
  60
  61   if (!wifi_access_point_info_provider_.get()) {
  62 #if defined(OS_CHROMEOS)
  63     wifi_access_point_info_provider_.reset(
  64         new WifiAccessPointInfoProviderChromeos());
  65 #else
  66     wifi_access_point_info_provider_.reset(
  67         new WifiAccessPointInfoProvider());
  68 #endif  // OS_CHROMEOS
  69   }
  70
  71   // Connected wifi access point information.
  72   WifiAccessPointInfoProvider::WifiAccessPointInfo info;
  73   if (wifi_access_point_info_provider_->GetInfo(&info))
  74     WriteWifiAccessPointProto(info, network);
  75 }
  76
  77 void NetworkMetricsProvider::OnConnectionTypeChanged(
  78     net::NetworkChangeNotifier::ConnectionType type) {
  79   // To avoid reporting an ambiguous connection type for users on flaky
  80   // connections, ignore transitions to the "none" state. Note that the
  81   // connection type is refreshed in ProvideSystemProfileMetrics() each time a
  82   // new UMA logging window begins, so users who genuinely transition to offline
  83   // mode for an extended duration will still be at least partially represented
  84   // in the metrics logs.
  85   if (type == net::NetworkChangeNotifier::CONNECTION_NONE)
  86     return;
  87
  88   if (type != connection_type_ &&
  89       connection_type_ != net::NetworkChangeNotifier::CONNECTION_NONE) {
  90     connection_type_is_ambiguous_ = true;
  91   }
  92   connection_type_ = type;
  93
  94   ProbeWifiPHYLayerProtocol();
  95 }
  96
  97 SystemProfileProto::Network::ConnectionType
  98 NetworkMetricsProvider::GetConnectionType() const {
  99   switch (connection_type_) {
 100     case net::NetworkChangeNotifier::CONNECTION_NONE:
 101     case net::NetworkChangeNotifier::CONNECTION_UNKNOWN:
 102       return SystemProfileProto::Network::CONNECTION_UNKNOWN;
 103     case net::NetworkChangeNotifier::CONNECTION_ETHERNET:
 104       return SystemProfileProto::Network::CONNECTION_ETHERNET;
 105     case net::NetworkChangeNotifier::CONNECTION_WIFI:
 106       return SystemProfileProto::Network::CONNECTION_WIFI;
 107     case net::NetworkChangeNotifier::CONNECTION_2G:
 108       return SystemProfileProto::Network::CONNECTION_2G;
 109     case net::NetworkChangeNotifier::CONNECTION_3G:
 110       return SystemProfileProto::Network::CONNECTION_3G;
 111     case net::NetworkChangeNotifier::CONNECTION_4G:
 112       return SystemProfileProto::Network::CONNECTION_4G;
 113     case net::NetworkChangeNotifier::CONNECTION_BLUETOOTH:
 114       return SystemProfileProto::Network::CONNECTION_BLUETOOTH;
 115   }
 116   NOTREACHED();
 117   return SystemProfileProto::Network::CONNECTION_UNKNOWN;
 118 }
 119
 120 SystemProfileProto::Network::WifiPHYLayerProtocol
 121 NetworkMetricsProvider::GetWifiPHYLayerProtocol() const {
 122   switch (wifi_phy_layer_protocol_) {
 123     case net::WIFI_PHY_LAYER_PROTOCOL_NONE:
 124       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_NONE;
 125     case net::WIFI_PHY_LAYER_PROTOCOL_ANCIENT:
 126       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_ANCIENT;
 127     case net::WIFI_PHY_LAYER_PROTOCOL_A:
 128       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_A;
 129     case net::WIFI_PHY_LAYER_PROTOCOL_B:
 130       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_B;
 131     case net::WIFI_PHY_LAYER_PROTOCOL_G:
 132       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_G;
 133     case net::WIFI_PHY_LAYER_PROTOCOL_N:
 134       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_N;
 135     case net::WIFI_PHY_LAYER_PROTOCOL_UNKNOWN:
 136       return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_UNKNOWN;
 137   }
 138   NOTREACHED();
 139   return SystemProfileProto::Network::WIFI_PHY_LAYER_PROTOCOL_UNKNOWN;
 140 }
 141
 142 void NetworkMetricsProvider::ProbeWifiPHYLayerProtocol() {
 143   PostTaskAndReplyWithResult(
 144       io_task_runner_,
 145       FROM_HERE,
 146       base::Bind(&net::GetWifiPHYLayerProtocol),
 147       base::Bind(&NetworkMetricsProvider::OnWifiPHYLayerProtocolResult,
 148                  weak_ptr_factory_.GetWeakPtr()));
 149 }
 150
 151 void NetworkMetricsProvider::OnWifiPHYLayerProtocolResult(
 152     net::WifiPHYLayerProtocol mode) {
 153   if (wifi_phy_layer_protocol_ != net::WIFI_PHY_LAYER_PROTOCOL_UNKNOWN &&
 154       mode != wifi_phy_layer_protocol_) {
 155     wifi_phy_layer_protocol_is_ambiguous_ = true;
 156   }
 157   wifi_phy_layer_protocol_ = mode;
 158 }
 159
 160 void NetworkMetricsProvider::WriteWifiAccessPointProto(
 161     const WifiAccessPointInfoProvider::WifiAccessPointInfo& info,
 162     SystemProfileProto::Network* network_proto) {
 163   SystemProfileProto::Network::WifiAccessPoint* access_point_info =
 164       network_proto->mutable_access_point_info();
 165   SystemProfileProto::Network::WifiAccessPoint::SecurityMode security =
 166       SystemProfileProto::Network::WifiAccessPoint::SECURITY_UNKNOWN;
 167   switch (info.security) {
 168     case WifiAccessPointInfoProvider::WIFI_SECURITY_NONE:
 169       security = SystemProfileProto::Network::WifiAccessPoint::SECURITY_NONE;
 170       break;
 171     case WifiAccessPointInfoProvider::WIFI_SECURITY_WPA:
 172       security = SystemProfileProto::Network::WifiAccessPoint::SECURITY_WPA;
 173       break;
 174     case WifiAccessPointInfoProvider::WIFI_SECURITY_WEP:
 175       security = SystemProfileProto::Network::WifiAccessPoint::SECURITY_WEP;
 176       break;
 177     case WifiAccessPointInfoProvider::WIFI_SECURITY_RSN:
 178       security = SystemProfileProto::Network::WifiAccessPoint::SECURITY_RSN;
 179       break;
 180     case WifiAccessPointInfoProvider::WIFI_SECURITY_802_1X:
 181       security = SystemProfileProto::Network::WifiAccessPoint::SECURITY_802_1X;
 182       break;
 183     case WifiAccessPointInfoProvider::WIFI_SECURITY_PSK:
 184       security = SystemProfileProto::Network::WifiAccessPoint::SECURITY_PSK;
 185       break;
 186     case WifiAccessPointInfoProvider::WIFI_SECURITY_UNKNOWN:
 187       security = SystemProfileProto::Network::WifiAccessPoint::SECURITY_UNKNOWN;
 188       break;
 189   }
 190   access_point_info->set_security_mode(security);
 191
 192   // |bssid| is xx:xx:xx:xx:xx:xx, extract the first three components and
 193   // pack into a uint32.
 194   std::string bssid = info.bssid;
 195   if (bssid.size() == 17 && bssid[2] == ':' && bssid[5] == ':' &&
 196       bssid[8] == ':' && bssid[11] == ':' && bssid[14] == ':') {
 197     std::string vendor_prefix_str;
 198     uint32 vendor_prefix;
 199
 200     base::RemoveChars(bssid.substr(0, 9), ":", &vendor_prefix_str);
 201     DCHECK_EQ(6U, vendor_prefix_str.size());
 202     if (base::HexStringToUInt(vendor_prefix_str, &vendor_prefix))
 203       access_point_info->set_vendor_prefix(vendor_prefix);
 204     else
 205       NOTREACHED();
 206   }
 207
 208   // Return if vendor information is not provided.
 209   if (info.model_number.empty() && info.model_name.empty() &&
 210       info.device_name.empty() && info.oui_list.empty())
 211     return;
 212
 213   SystemProfileProto::Network::WifiAccessPoint::VendorInformation* vendor =
 214       access_point_info->mutable_vendor_info();
 215   if (!info.model_number.empty())
 216     vendor->set_model_number(info.model_number);
 217   if (!info.model_name.empty())
 218     vendor->set_model_name(info.model_name);
 219   if (!info.device_name.empty())
 220     vendor->set_device_name(info.device_name);
 221
 222   // Return if OUI list is not provided.
 223   if (info.oui_list.empty())
 224     return;
 225
 226   // Parse OUI list.
 227   std::vector<std::string> oui_list;
 228   base::SplitString(info.oui_list, ' ', &oui_list);
 229   for (std::vector<std::string>::const_iterator it = oui_list.begin();
 230        it != oui_list.end();
 231        ++it) {
 232     uint32 oui;
 233     if (base::HexStringToUInt(*it, &oui))
 234       vendor->add_element_identifier(oui);
 235     else
 236       NOTREACHED();
 237   }
 238 }
 239
 240 }  // namespace metrics