content/browser/geolocation/wifi_data.h

   1 // Copyright 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 CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_H_
   6 #define CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_H_
   7
   8 #include <set>
   9
  10 #include "base/basictypes.h"
  11 #include "base/strings/string16.h"
  12 #include "content/common/content_export.h"
  13
  14 namespace content {
  15
  16 // Wifi data relating to a single access point.
  17 struct CONTENT_EXPORT AccessPointData {
  18   AccessPointData();
  19   ~AccessPointData();
  20
  21   // MAC address, formatted as per MacAddressAsString16.
  22   base::string16 mac_address;
  23   int radio_signal_strength;  // Measured in dBm
  24   int channel;
  25   int signal_to_noise;  // Ratio in dB
  26   base::string16 ssid;   // Network identifier
  27 };
  28
  29 // This is to allow AccessPointData to be used in std::set. We order
  30 // lexicographically by MAC address.
  31 struct AccessPointDataLess {
  32   bool operator()(const AccessPointData& data1,
  33                   const AccessPointData& data2) const {
  34     return data1.mac_address < data2.mac_address;
  35   }
  36 };
  37
  38 // All data for wifi.
  39 struct CONTENT_EXPORT WifiData {
  40   WifiData();
  41   ~WifiData();
  42
  43   // Determines whether a new set of WiFi data differs significantly from this.
  44   bool DiffersSignificantly(const WifiData& other) const;
  45
  46   // Store access points as a set, sorted by MAC address. This allows quick
  47   // comparison of sets for detecting changes and for caching.
  48   typedef std::set<AccessPointData, AccessPointDataLess> AccessPointDataSet;
  49   AccessPointDataSet access_point_data;
  50 };
  51
  52 }  // namespace content
  53
  54 #endif  // CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_H_