Reland 2:Geolocation: move from content/browser to device/

content/browser/geolocation/wifi_data_provider_linux.cc

Index: content/browser/geolocation/wifi_data_provider_linux.cc
diff --git a/content/browser/geolocation/wifi_data_provider_linux.cc b/content/browser/geolocation/wifi_data_provider_linux.cc
deleted file mode 100644
index f0afc66d9bb9873d6953817295b9a8c9c165c89a..0000000000000000000000000000000000000000
--- a/content/browser/geolocation/wifi_data_provider_linux.cc
+++ /dev/null
@@ -1,381 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Provides wifi scan API binding for suitable for typical linux distributions.
-// Currently, only the NetworkManager API is used, accessed via D-Bus (in turn
-// accessed via the GLib wrapper).
-
-#include "content/browser/geolocation/wifi_data_provider_linux.h"
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <memory>
-
-#include "base/macros.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/utf_string_conversions.h"
-#include "content/browser/geolocation/wifi_data_provider_manager.h"
-#include "dbus/bus.h"
-#include "dbus/message.h"
-#include "dbus/object_path.h"
-#include "dbus/object_proxy.h"
-
-namespace content {
-namespace {
-// The time periods between successive polls of the wifi data.
-const int kDefaultPollingIntervalMilliseconds = 10 * 1000;  // 10s
-const int kNoChangePollingIntervalMilliseconds = 2 * 60 * 1000;  // 2 mins
-const int kTwoNoChangePollingIntervalMilliseconds = 10 * 60 * 1000;  // 10 mins
-const int kNoWifiPollingIntervalMilliseconds = 20 * 1000; // 20s
-
-const char kNetworkManagerServiceName[] = "org.freedesktop.NetworkManager";
-const char kNetworkManagerPath[] = "/org/freedesktop/NetworkManager";
-const char kNetworkManagerInterface[] = "org.freedesktop.NetworkManager";
-
-// From http://projects.gnome.org/NetworkManager/developers/spec.html
-enum { NM_DEVICE_TYPE_WIFI = 2 };
-
-// Wifi API binding to NetworkManager, to allow reuse of the polling behavior
-// defined in WifiDataProviderCommon.
-// TODO(joth): NetworkManager also allows for notification based handling,
-// however this will require reworking of the threading code to run a GLib
-// event loop (GMainLoop).
-class NetworkManagerWlanApi : public WifiDataProviderCommon::WlanApiInterface {
- public:
-  NetworkManagerWlanApi();
-  ~NetworkManagerWlanApi() override;
-
-  // Must be called before any other interface method. Will return false if the
-  // NetworkManager session cannot be created (e.g. not present on this distro),
-  // in which case no other method may be called.
-  bool Init();
-
-  // Similar to Init() but can inject the bus object. Used for testing.
-  bool InitWithBus(dbus::Bus* bus);
-
-  // WifiDataProviderCommon::WlanApiInterface
-  //
-  // This function makes blocking D-Bus calls, but it's totally fine as
-  // the code runs in "Geolocation" thread, not the browser's UI thread.
-  bool GetAccessPointData(WifiData::AccessPointDataSet* data) override;
-
- private:
-  // Enumerates the list of available network adapter devices known to
-  // NetworkManager. Return true on success.
-  bool GetAdapterDeviceList(std::vector<dbus::ObjectPath>* device_paths);
-
-  // Given the NetworkManager path to a wireless adapater, dumps the wifi scan
-  // results and appends them to |data|. Returns false if a fatal error is
-  // encountered such that the data set could not be populated.
-  bool GetAccessPointsForAdapter(const dbus::ObjectPath& adapter_path,
-                                 WifiData::AccessPointDataSet* data);
-
-  // Internal method used by |GetAccessPointsForAdapter|, given a wifi access
-  // point proxy retrieves the named property and returns it. Returns NULL in
-  // a scoped_ptr if the property could not be read.
-  std::unique_ptr<dbus::Response> GetAccessPointProperty(
-      dbus::ObjectProxy* proxy,
-      const std::string& property_name);
-
-  scoped_refptr<dbus::Bus> system_bus_;
-  dbus::ObjectProxy* network_manager_proxy_;
-
-  DISALLOW_COPY_AND_ASSIGN(NetworkManagerWlanApi);
-};
-
-// Convert a wifi frequency to the corresponding channel. Adapted from
-// geolocaiton/wifilib.cc in googleclient (internal to google).
-int frquency_in_khz_to_channel(int frequency_khz) {
-  if (frequency_khz >= 2412000 && frequency_khz <= 2472000)  // Channels 1-13.
-    return (frequency_khz - 2407000) / 5000;
-  if (frequency_khz == 2484000)
-    return 14;
-  if (frequency_khz > 5000000 && frequency_khz < 6000000)  // .11a bands.
-    return (frequency_khz - 5000000) / 5000;
-  // Ignore everything else.
-  return AccessPointData().channel;  // invalid channel
-}
-
-NetworkManagerWlanApi::NetworkManagerWlanApi()
-    : network_manager_proxy_(NULL) {
-}
-
-NetworkManagerWlanApi::~NetworkManagerWlanApi() {
-  // Close the connection.
-  system_bus_->ShutdownAndBlock();
-}
-
-bool NetworkManagerWlanApi::Init() {
-  dbus::Bus::Options options;
-  options.bus_type = dbus::Bus::SYSTEM;
-  options.connection_type = dbus::Bus::PRIVATE;
-  return InitWithBus(new dbus::Bus(options));
-}
-
-bool NetworkManagerWlanApi::InitWithBus(dbus::Bus* bus) {
-  system_bus_ = bus;
-  // system_bus_ will own all object proxies created from the bus.
-  network_manager_proxy_ =
-      system_bus_->GetObjectProxy(kNetworkManagerServiceName,
-                                  dbus::ObjectPath(kNetworkManagerPath));
-  // Validate the proxy object by checking we can enumerate devices.
-  std::vector<dbus::ObjectPath> adapter_paths;
-  const bool success = GetAdapterDeviceList(&adapter_paths);
-  VLOG(1) << "Init() result:  " << success;
-  return success;
-}
-
-bool NetworkManagerWlanApi::GetAccessPointData(
-    WifiData::AccessPointDataSet* data) {
-  std::vector<dbus::ObjectPath> device_paths;
-  if (!GetAdapterDeviceList(&device_paths)) {
-    LOG(WARNING) << "Could not enumerate access points";
-    return false;
-  }
-  int success_count = 0;
-  int fail_count = 0;
-
-  // Iterate the devices, getting APs for each wireless adapter found
-  for (size_t i = 0; i < device_paths.size(); ++i) {
-    const dbus::ObjectPath& device_path = device_paths[i];
-    VLOG(1) << "Checking device: " << device_path.value();
-
-    dbus::ObjectProxy* device_proxy =
-        system_bus_->GetObjectProxy(kNetworkManagerServiceName,
-                                    device_path);
-
-    dbus::MethodCall method_call(DBUS_INTERFACE_PROPERTIES, "Get");
-    dbus::MessageWriter builder(&method_call);
-    builder.AppendString("org.freedesktop.NetworkManager.Device");
-    builder.AppendString("DeviceType");
-    std::unique_ptr<dbus::Response> response(device_proxy->CallMethodAndBlock(
-        &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT));
-    if (!response) {
-      LOG(WARNING) << "Failed to get the device type for "
-                   << device_path.value();
-      continue;  // Check the next device.
-    }
-    dbus::MessageReader reader(response.get());
-    uint32_t device_type = 0;
-    if (!reader.PopVariantOfUint32(&device_type)) {
-      LOG(WARNING) << "Unexpected response for " << device_type << ": "
-                   << response->ToString();
-      continue;  // Check the next device.
-    }
-    VLOG(1) << "Device type: " << device_type;
-
-    if (device_type == NM_DEVICE_TYPE_WIFI) {  // Found a wlan adapter
-      if (GetAccessPointsForAdapter(device_path, data))
-        ++success_count;
-      else
-        ++fail_count;
-    }
-  }
-  // At least one successful scan overrides any other adapter reporting error.
-  return success_count || fail_count == 0;
-}
-
-bool NetworkManagerWlanApi::GetAdapterDeviceList(
-    std::vector<dbus::ObjectPath>* device_paths) {
-  dbus::MethodCall method_call(kNetworkManagerInterface, "GetDevices");
-  std::unique_ptr<dbus::Response> response(
-      network_manager_proxy_->CallMethodAndBlock(
-          &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT));
-  if (!response) {
-    LOG(WARNING) << "Failed to get the device list";
-    return false;
-  }
-
-  dbus::MessageReader reader(response.get());
-  if (!reader.PopArrayOfObjectPaths(device_paths)) {
-    LOG(WARNING) << "Unexpected response: " << response->ToString();
-    return false;
-  }
-  return true;
-}
-
-
-bool NetworkManagerWlanApi::GetAccessPointsForAdapter(
-    const dbus::ObjectPath& adapter_path, WifiData::AccessPointDataSet* data) {
-  // Create a proxy object for this wifi adapter, and ask it to do a scan
-  // (or at least, dump its scan results).
-  dbus::ObjectProxy* device_proxy =
-      system_bus_->GetObjectProxy(kNetworkManagerServiceName,
-                                  adapter_path);
-  dbus::MethodCall method_call(
-      "org.freedesktop.NetworkManager.Device.Wireless",
-      "GetAccessPoints");
-  std::unique_ptr<dbus::Response> response(device_proxy->CallMethodAndBlock(
-      &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT));
-  if (!response) {
-    LOG(WARNING) << "Failed to get access points data for "
-                 << adapter_path.value();
-    return false;
-  }
-  dbus::MessageReader reader(response.get());
-  std::vector<dbus::ObjectPath> access_point_paths;
-  if (!reader.PopArrayOfObjectPaths(&access_point_paths)) {
-    LOG(WARNING) << "Unexpected response for " << adapter_path.value() << ": "
-                 << response->ToString();
-    return false;
-  }
-
-  VLOG(1) << "Wireless adapter " << adapter_path.value() << " found "
-          << access_point_paths.size() << " access points.";
-
-  for (size_t i = 0; i < access_point_paths.size(); ++i) {
-    const dbus::ObjectPath& access_point_path = access_point_paths[i];
-    VLOG(1) << "Checking access point: " << access_point_path.value();
-
-    dbus::ObjectProxy* access_point_proxy =
-        system_bus_->GetObjectProxy(kNetworkManagerServiceName,
-                                    access_point_path);
-
-    AccessPointData access_point_data;
-    {
-      std::unique_ptr<dbus::Response> response(
-          GetAccessPointProperty(access_point_proxy, "Ssid"));
-      if (!response)
-        continue;
-      // The response should contain a variant that contains an array of bytes.
-      dbus::MessageReader reader(response.get());
-      dbus::MessageReader variant_reader(response.get());
-      if (!reader.PopVariant(&variant_reader)) {
-        LOG(WARNING) << "Unexpected response for " << access_point_path.value()
-                     << ": " << response->ToString();
-        continue;
-      }
-      const uint8_t* ssid_bytes = NULL;
-      size_t ssid_length = 0;
-      if (!variant_reader.PopArrayOfBytes(&ssid_bytes, &ssid_length)) {
-        LOG(WARNING) << "Unexpected response for " << access_point_path.value()
-                     << ": " << response->ToString();
-        continue;
-      }
-      std::string ssid(ssid_bytes, ssid_bytes + ssid_length);
-      access_point_data.ssid = base::UTF8ToUTF16(ssid);
-    }
-
-    { // Read the mac address
-      std::unique_ptr<dbus::Response> response(
-          GetAccessPointProperty(access_point_proxy, "HwAddress"));
-      if (!response)
-        continue;
-      dbus::MessageReader reader(response.get());
-      std::string mac;
-      if (!reader.PopVariantOfString(&mac)) {
-        LOG(WARNING) << "Unexpected response for " << access_point_path.value()
-                     << ": " << response->ToString();
-        continue;
-      }
-
-      base::ReplaceSubstringsAfterOffset(&mac, 0U, ":", base::StringPiece());
-      std::vector<uint8_t> mac_bytes;
-      if (!base::HexStringToBytes(mac, &mac_bytes) || mac_bytes.size() != 6) {
-        LOG(WARNING) << "Can't parse mac address (found " << mac_bytes.size()
-                     << " bytes) so using raw string: " << mac;
-        access_point_data.mac_address = base::UTF8ToUTF16(mac);
-      } else {
-        access_point_data.mac_address = MacAddressAsString16(&mac_bytes[0]);
-      }
-    }
-
-    {  // Read signal strength.
-      std::unique_ptr<dbus::Response> response(
-          GetAccessPointProperty(access_point_proxy, "Strength"));
-      if (!response)
-        continue;
-      dbus::MessageReader reader(response.get());
-      uint8_t strength = 0;
-      if (!reader.PopVariantOfByte(&strength)) {
-        LOG(WARNING) << "Unexpected response for " << access_point_path.value()
-                     << ": " << response->ToString();
-        continue;
-      }
-      // Convert strength as a percentage into dBs.
-      access_point_data.radio_signal_strength = -100 + strength / 2;
-    }
-
-    { // Read the channel
-      std::unique_ptr<dbus::Response> response(
-          GetAccessPointProperty(access_point_proxy, "Frequency"));
-      if (!response)
-        continue;
-      dbus::MessageReader reader(response.get());
-      uint32_t frequency = 0;
-      if (!reader.PopVariantOfUint32(&frequency)) {
-        LOG(WARNING) << "Unexpected response for " << access_point_path.value()
-                     << ": " << response->ToString();
-        continue;
-      }
-
-      // NetworkManager returns frequency in MHz.
-      access_point_data.channel =
-          frquency_in_khz_to_channel(frequency * 1000);
-    }
-    VLOG(1) << "Access point data of " << access_point_path.value() << ": "
-            << "SSID: " << access_point_data.ssid << ", "
-            << "MAC: " << access_point_data.mac_address << ", "
-            << "Strength: " << access_point_data.radio_signal_strength << ", "
-            << "Channel: " << access_point_data.channel;
-
-    data->insert(access_point_data);
-  }
-  return true;
-}
-
-std::unique_ptr<dbus::Response> NetworkManagerWlanApi::GetAccessPointProperty(
-    dbus::ObjectProxy* access_point_proxy,
-    const std::string& property_name) {
-  dbus::MethodCall method_call(DBUS_INTERFACE_PROPERTIES, "Get");
-  dbus::MessageWriter builder(&method_call);
-  builder.AppendString("org.freedesktop.NetworkManager.AccessPoint");
-  builder.AppendString(property_name);
-  std::unique_ptr<dbus::Response> response =
-      access_point_proxy->CallMethodAndBlock(
-          &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT);
-  if (!response) {
-    LOG(WARNING) << "Failed to get property for " << property_name;
-  }
-  return response;
-}
-
-}  // namespace
-
-// static
-WifiDataProvider* WifiDataProviderManager::DefaultFactoryFunction() {
-  return new WifiDataProviderLinux();
-}
-
-WifiDataProviderLinux::WifiDataProviderLinux() {
-}
-
-WifiDataProviderLinux::~WifiDataProviderLinux() {
-}
-
-WifiDataProviderCommon::WlanApiInterface*
-WifiDataProviderLinux::NewWlanApi() {
-  std::unique_ptr<NetworkManagerWlanApi> wlan_api(new NetworkManagerWlanApi);
-  if (wlan_api->Init())
-    return wlan_api.release();
-  return NULL;
-}
-
-WifiPollingPolicy* WifiDataProviderLinux::NewPollingPolicy() {
-  return new GenericWifiPollingPolicy<kDefaultPollingIntervalMilliseconds,
-                                      kNoChangePollingIntervalMilliseconds,
-                                      kTwoNoChangePollingIntervalMilliseconds,
-                                      kNoWifiPollingIntervalMilliseconds>;
-}
-
-WifiDataProviderCommon::WlanApiInterface*
-WifiDataProviderLinux::NewWlanApiForTesting(dbus::Bus* bus) {
-  std::unique_ptr<NetworkManagerWlanApi> wlan_api(new NetworkManagerWlanApi);
-  if (wlan_api->InitWithBus(bus))
-    return wlan_api.release();
-  return NULL;
-}
-
-}  // namespace content