net/quic/network_connection.cc

   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 #include "net/quic/network_connection.h"
   6
   7 #include "net/base/net_util.h"
   8
   9 namespace net {
  10
  11 NetworkConnection::NetworkConnection()
  12     : connection_type_(NetworkChangeNotifier::CONNECTION_UNKNOWN),
  13       connection_description_(nullptr) {
  14 }
  15
  16 const char* NetworkConnection::GetDescription() {
  17   NetworkChangeNotifier::ConnectionType type =
  18       NetworkChangeNotifier::GetConnectionType();
  19   if (connection_description_ != nullptr && type == connection_type_)
  20     return connection_description_;
  21
  22   DVLOG(1) << "Updating NetworkConnection's Cached Data";
  23
  24   connection_description_ = NetworkChangeNotifier::ConnectionTypeToString(type);
  25   connection_type_ = type;
  26   if (connection_type_ == NetworkChangeNotifier::CONNECTION_UNKNOWN ||
  27       connection_type_ == NetworkChangeNotifier::CONNECTION_WIFI) {
  28     // This function only seems usefully defined on Windows currently.
  29     WifiPHYLayerProtocol wifi_type = GetWifiPHYLayerProtocol();
  30     switch (wifi_type) {
  31       case WIFI_PHY_LAYER_PROTOCOL_NONE:
  32         // No wifi support or no associated AP.
  33         break;
  34       case WIFI_PHY_LAYER_PROTOCOL_ANCIENT:
  35         // An obsolete modes introduced by the original 802.11, e.g. IR, FHSS.
  36         connection_description_ = "CONNECTION_WIFI_ANCIENT";
  37         break;
  38       case WIFI_PHY_LAYER_PROTOCOL_A:
  39         // 802.11a, OFDM-based rates.
  40         connection_description_ = "CONNECTION_WIFI_802.11a";
  41         break;
  42       case WIFI_PHY_LAYER_PROTOCOL_B:
  43         // 802.11b, DSSS or HR DSSS.
  44         connection_description_ = "CONNECTION_WIFI_802.11b";
  45         break;
  46       case WIFI_PHY_LAYER_PROTOCOL_G:
  47         // 802.11g, same rates as 802.11a but compatible with 802.11b.
  48         connection_description_ = "CONNECTION_WIFI_802.11g";
  49         break;
  50       case WIFI_PHY_LAYER_PROTOCOL_N:
  51         // 802.11n, HT rates.
  52         connection_description_ = "CONNECTION_WIFI_802.11n";
  53         break;
  54       case WIFI_PHY_LAYER_PROTOCOL_UNKNOWN:
  55         // Unclassified mode or failure to identify.
  56         break;
  57     }
  58   }
  59   return connection_description_;
  60 }
  61
  62 void NetworkConnection::Clear() {
  63   connection_type_ = NetworkChangeNotifier::CONNECTION_UNKNOWN;
  64   connection_description_ = nullptr;
  65 }
  66
  67 void NetworkConnection::OnIPAddressChanged() {
  68   Clear();
  69 }
  70
  71 void NetworkConnection::OnConnectionTypeChanged(
  72     NetworkChangeNotifier::ConnectionType type) {
  73   Clear();
  74 }
  75
  76 }  // namespace net