Windows-specific implementation of Networking Private API.

Previously reviewed as https://codereview.chromium.org/27722003, but
moves WiFiService Windows implementation to components/wifi.

Based on infrastructure in https://codereview.chromium.org/54323003/

BUG=267667

Review URL: https://codereview.chromium.org/68503019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236816 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 1274 insertions, 0 deletions

diff --git a/components/wifi/wifi_service_win.cc b/components/wifi/wifi_service_win.cc
new file mode 100644
index 0000000..052062d
--- /dev/null
+++ b/components/wifi/wifi_service_win.cc
@@ -0,0 +1,1274 @@
+// Copyright 2013 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.
+
+#include "components/wifi/wifi_service.h"
+
+#include <iphlpapi.h>
+#include <objbase.h>
+#include <wlanapi.h>
+
+#include <set>
+
+#include "base/base_paths_win.h"
+#include "base/bind.h"
+#include "base/files/file_path.h"
+#include "base/memory/ref_counted.h"
+#include "base/message_loop/message_loop.h"
+#include "base/path_service.h"
+#include "base/strings/string16.h"
+#include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/win/registry.h"
+#include "components/onc/onc_constants.h"
+
+namespace {
+const char kWiFiServiceError[] = "Error.WiFiService";
+const wchar_t kNwCategoryWizardRegKey[] =
+    L"Software\\Microsoft\\Windows NT\\CurrentVersion\\Network\\"
+    L"NwCategoryWizard";
+const wchar_t kNwCategoryWizardRegValue[] = L"Show";
+const wchar_t kNwCategoryWizardSavedRegValue[] = L"ShowSaved";
+const wchar_t kNwCategoryWizardDeleteRegValue[] = L"ShowDelete";
+const wchar_t kWlanApiDll[] = L"wlanapi.dll";
+
+// WlanApi function names
+const char kWlanConnect[] = "WlanConnect";
+const char kWlanCloseHandle[] = "WlanCloseHandle";
+const char kWlanDisconnect[] = "WlanDisconnect";
+const char kWlanEnumInterfaces[] = "WlanEnumInterfaces";
+const char kWlanFreeMemory[] = "WlanFreeMemory";
+const char kWlanGetAvailableNetworkList[] = "WlanGetAvailableNetworkList";
+const char kWlanGetNetworkBssList[] = "WlanGetNetworkBssList";
+const char kWlanGetProfile[] = "WlanGetProfile";
+const char kWlanOpenHandle[] = "WlanOpenHandle";
+const char kWlanRegisterNotification[] = "WlanRegisterNotification";
+const char kWlanSaveTemporaryProfile[] = "WlanSaveTemporaryProfile";
+const char kWlanScan[] = "WlanScan";
+
+// WlanApi function definitions
+typedef DWORD (WINAPI* WlanConnectFunction)(
+    HANDLE hClientHandle,
+    CONST GUID *pInterfaceGuid,
+    CONST PWLAN_CONNECTION_PARAMETERS pConnectionParameters,
+    PVOID pReserved);
+
+typedef DWORD (WINAPI* WlanCloseHandleFunction)(
+    HANDLE hClientHandle,
+    PVOID pReserved);
+
+typedef DWORD (WINAPI* WlanDisconnectFunction)(
+    HANDLE hClientHandle,
+    CONST GUID *pInterfaceGuid,
+    PVOID pReserved);
+
+typedef DWORD (WINAPI* WlanEnumInterfacesFunction)(
+    HANDLE hClientHandle,
+    PVOID pReserved,
+    PWLAN_INTERFACE_INFO_LIST *ppInterfaceList);
+
+typedef VOID (WINAPI* WlanFreeMemoryFunction)(
+    _In_ PVOID pMemory);
+
+typedef DWORD (WINAPI* WlanGetAvailableNetworkListFunction)(
+    HANDLE hClientHandle,
+    CONST GUID *pInterfaceGuid,
+    DWORD dwFlags,
+    PVOID pReserved,
+    PWLAN_AVAILABLE_NETWORK_LIST *ppAvailableNetworkList);
+
+typedef DWORD (WINAPI* WlanGetNetworkBssListFunction)(
+    HANDLE hClientHandle,
+    const GUID* pInterfaceGuid,
+    const  PDOT11_SSID pDot11Ssid,
+    DOT11_BSS_TYPE dot11BssType,
+    BOOL bSecurityEnabled,
+    PVOID pReserved,
+    PWLAN_BSS_LIST* ppWlanBssList);
+
+typedef DWORD (WINAPI* WlanGetProfileFunction)(
+    HANDLE hClientHandle,
+    CONST GUID *pInterfaceGuid,
+    LPCWSTR strProfileName,
+    PVOID pReserved,
+    LPWSTR *pstrProfileXml,
+    DWORD *pdwFlags,
+    DWORD *pdwGrantedAccess);
+
+typedef DWORD (WINAPI* WlanOpenHandleFunction)(
+    DWORD dwClientVersion,
+    PVOID pReserved,
+    PDWORD pdwNegotiatedVersion,
+    PHANDLE phClientHandle);
+
+typedef DWORD (WINAPI* WlanRegisterNotificationFunction)(
+    HANDLE hClientHandle,
+    DWORD dwNotifSource,
+    BOOL bIgnoreDuplicate,
+    WLAN_NOTIFICATION_CALLBACK funcCallback,
+    PVOID pCallbackContext,
+    PVOID pReserved,
+    PDWORD pdwPrevNotifSource);
+
+typedef DWORD (WINAPI* WlanSaveTemporaryProfileFunction)(
+    HANDLE hClientHandle,
+    CONST GUID* pInterfaceGuid,
+    LPCWSTR strProfileName,
+    LPCWSTR strAllUserProfileSecurity,
+    DWORD dwFlags,
+    BOOL bOverWrite,
+    PVOID pReserved);
+
+typedef DWORD (WINAPI* WlanScanFunction)(
+    HANDLE hClientHandle,
+    CONST GUID *pInterfaceGuid,
+    CONST PDOT11_SSID pDot11Ssid,
+    CONST PWLAN_RAW_DATA pIeData,
+    PVOID pReserved);
+
+}  // namespace
+
+namespace wifi {
+
+// Implementation of WiFiService for Windows.
+class WiFiServiceImpl : public WiFiService, base::NonThreadSafe {
+ public:
+  WiFiServiceImpl();
+  virtual ~WiFiServiceImpl();
+
+  // WiFiService interface implementation.
+  virtual void Initialize(
+      scoped_refptr<base::SequencedTaskRunner> task_runner) OVERRIDE;
+
+  virtual void UnInitialize() OVERRIDE;
+
+  // Get Properties of network identified by |network_guid|. Populates
+  // |properties| on success, |error| on failure.
+  virtual void GetProperties(const std::string& network_guid,
+                             DictionaryValue* properties,
+                             std::string* error) OVERRIDE;
+
+  // Set Properties of network identified by |network_guid|. Populates |error|
+  // on failure.
+  virtual void SetProperties(const std::string& network_guid,
+                             scoped_ptr<base::DictionaryValue> properties,
+                             std::string* error) OVERRIDE;
+
+  // Get list of visible networks. Populates |network_list| on success.
+  virtual void GetVisibleNetworks(ListValue* network_list) OVERRIDE;
+
+  // Request network scan. Send |NetworkListChanged| event on completion.
+  virtual void RequestNetworkScan() OVERRIDE;
+
+  // Start connect to network identified by |network_guid|. Populates |error|
+  // on failure.
+  virtual void StartConnect(const std::string& network_guid,
+                            std::string* error) OVERRIDE;
+
+  // Start disconnect from network identified by |network_guid|. Populates
+  // |error| on failure.
+  virtual void StartDisconnect(const std::string& network_guid,
+                               std::string* error) OVERRIDE;
+
+  // Set observers to run when |NetworksChanged| and |NetworksListChanged|
+  // events needs to be sent. Notifications are posted on |message_loop_proxy|.
+  virtual void SetEventObservers(
+      scoped_refptr<base::MessageLoopProxy> message_loop_proxy,
+      const NetworkGuidListCallback& networks_changed_observer,
+      const NetworkGuidListCallback& network_list_changed_observer) OVERRIDE;
+
+ private:
+  // Static callback for Windows WLAN_NOTIFICATION. Calls OnWlanNotification
+  // on WiFiServiceImpl passed back as |context|.
+  static void __stdcall OnWlanNotificationCallback(
+      PWLAN_NOTIFICATION_DATA wlan_notification_data,
+      PVOID context);
+
+  // Callback for Windows WLAN_NOTIFICATION. Called on random thread from
+  // OnWlanNotificationCallback. Handles network connectivity and scan complete
+  // notification and posts tasks to main thread.
+  void OnWlanNotification(PWLAN_NOTIFICATION_DATA wlan_notification_data);
+
+  // Handles NetworkScanComplete notification on main thread. Sends
+  // |NetworkListChanged| event with new list of visible networks.
+  void OnNetworkScanCompleteOnMainThread();
+
+  // Wait up to |kMaxAttempts| with |kAttemptDelayMs| delay for connection
+  // to network with |network_guid|. Reset DHCP and Notify that |NetworkChanged|
+  // upon success.
+  void WaitForNetworkConnect(const std::string& network_guid, int attempt);
+
+  // Check |error_code| and if is not |ERROR_SUCCESS|, then store |error_name|
+  // into |error|.
+  bool CheckError(DWORD error_code,
+                  const std::string& error_name,
+                  std::string* error) const;
+
+  // Return |iterator| to network identified by |network_guid| in |networks|
+  // list.
+  NetworkList::iterator FindNetwork(NetworkList& networks,
+                                    const std::string& network_guid);
+
+  // Save currently connected network profile and return its
+  // |connected_network_guid|, so it can be re-connected later.
+  DWORD SaveCurrentConnectedNetwork(std::string* connected_network_guid);
+
+  // Sort networks, so connected/connecting is up front, then by type:
+  // Ethernet, WiFi, Cellular, VPN
+  static void SortNetworks(NetworkList* networks);
+
+  // Open a WLAN client handle, register for WLAN notifications.
+  DWORD OpenClientHandle();
+
+  // Reset DHCP on wireless network to work around an issue when Windows
+  // takes forever to connect to the network, e.g. after Chromecast
+  // device reset.
+  DWORD ResetDHCP();
+
+  // Find |adapter_index_map| by |interface_guid| for DHCP reset.
+  DWORD FindAdapterIndexMapByGUID(const GUID& interface_guid,
+                                  IP_ADAPTER_INDEX_MAP* adapter_index_map);
+
+  // Avoid the network location wizard to pop up when network is connected.
+  // Preserve current value in |saved_nw_category_wizard_|.
+  DWORD DisableNwCategoryWizard();
+
+  // Restore network location wizard to value saved by DisableNwCategoryWizard.
+  DWORD RestoreNwCategoryWizard();
+
+  // Ensure that |client_| handle is initialized.
+  DWORD EnsureInitialized();
+
+  // Close |client_| handle if it is open.
+  DWORD CloseClientHandle();
+
+  // Get |profile_name| from unique |network_guid|.
+  base::string16 ProfileNameFromGUID(const std::string& network_guid) const {
+    return base::UTF8ToUTF16(network_guid);
+  }
+
+  // Get |dot11_ssid| from unique |network_guid|.
+  DOT11_SSID SSIDFromGUID(const std::string& network_guid) const;
+
+  // Get unique |network_guid| string based on |dot11_ssid|.
+  std::string GUIDFromSSID(const DOT11_SSID& dot11_ssid) const {
+    return std::string(reinterpret_cast<const char*>(dot11_ssid.ucSSID),
+                       dot11_ssid.uSSIDLength);
+  }
+
+  // Get network |ssid| string based on |wlan|.
+  std::string SSIDFromWLAN(const WLAN_AVAILABLE_NETWORK& wlan) const {
+    return GUIDFromSSID(wlan.dot11Ssid);
+  }
+
+  // Get unique |network_guid| string based on |wlan|.
+  std::string GUIDFromWLAN(const WLAN_AVAILABLE_NETWORK& wlan) const {
+    return SSIDFromWLAN(wlan);
+  }
+
+  // Deduce |onc::wifi| security from |alg|.
+  std::string SecurityFromDot11AuthAlg(DOT11_AUTH_ALGORITHM alg) const;
+
+  // Populate |properties| based on |wlan| and its corresponding bss info from
+  // |wlan_bss_list|.
+  void NetworkPropertiesFromAvailableNetwork(const WLAN_AVAILABLE_NETWORK& wlan,
+                                             const WLAN_BSS_LIST& wlan_bss_list,
+                                             NetworkProperties* properties);
+
+  // Get the list of visible wireless networks.
+  DWORD GetVisibleNetworkList(NetworkList* network_list);
+
+  // Find currently connected network if any. Populate |connected_network_guid|
+  // on success.
+  DWORD FindConnectedNetwork(std::string* connected_network_guid);
+
+  // Connect to network |network_guid| using previosly stored profile if exists,
+  // or just network sid. If |frequency| is not |kFrequencyUnknown| then
+  // connects only to BSS which uses that frequency and returns
+  // |ERROR_NOT_FOUND| if such BSS cannot be found.
+  DWORD Connect(const std::string& network_guid, Frequency frequency);
+
+  // Disconnect from currently connected network if any.
+  DWORD Disconnect();
+
+  // Get DOT11_BSSID_LIST of desired BSSIDs to connect to |ssid| network on
+  // given |frequency|.
+  DWORD GetDesiredBssList(DOT11_SSID& ssid,
+                          Frequency frequency,
+                          scoped_ptr<DOT11_BSSID_LIST>* desired_list);
+
+  // Save temporary wireless profile for |network_guid|.
+  DWORD SaveTempProfile(const std::string& network_guid);
+
+  // Get previously stored |profile_xml| for |network_guid|.
+  DWORD GetProfile(const std::string& network_guid, std::string* profile_xml);
+
+  // Return true if there is previously stored profile xml for |network_guid|.
+  bool HaveProfile(const std::string& network_guid);
+
+  // Notify |network_list_changed_observer_| that list of visible networks has
+  // changed to |networks|.
+  void NotifyNetworkListChanged(const NetworkList& networks);
+
+  // Notify |networks_changed_observer_| that network |network_guid| status has
+  // changed.
+  void NotifyNetworkChanged(const std::string& network_guid);
+
+  // Load WlanApi.dll from SystemDirectory and get Api function pointers.
+  DWORD LoadWlanLibrary();
+  // Instance of WlanApi.dll.
+  HINSTANCE wlan_api_library_;
+  // WlanApi function pointers
+  WlanConnectFunction WlanConnect_function_;
+  WlanCloseHandleFunction WlanCloseHandle_function_;
+  WlanDisconnectFunction WlanDisconnect_function_;
+  WlanEnumInterfacesFunction WlanEnumInterfaces_function_;
+  WlanFreeMemoryFunction WlanFreeMemory_function_;
+  WlanGetAvailableNetworkListFunction WlanGetAvailableNetworkList_function_;
+  // WlanGetNetworkBssList function may not be avaiable on Windows XP.
+  WlanGetNetworkBssListFunction WlanGetNetworkBssList_function_;
+  WlanGetProfileFunction WlanGetProfile_function_;
+  WlanOpenHandleFunction WlanOpenHandle_function_;
+  WlanRegisterNotificationFunction WlanRegisterNotification_function_;
+  WlanScanFunction WlanScan_function_;
+  // WlanSaveTemporaryProfile function may not be avaiable on Windows XP.
+  WlanSaveTemporaryProfileFunction WlanSaveTemporaryProfile_function_;
+
+  // WLAN service handle.
+  HANDLE client_;
+  // GUID of the currently connected interface, if any, otherwise the GUID of
+  // one of the WLAN interfaces.
+  GUID interface_guid_;
+  // Preserved WLAN profile xml.
+  std::map<std::string, std::string> saved_profiles_xml_;
+  // Observer to get notified when network(s) have changed (e.g. connect).
+  NetworkGuidListCallback networks_changed_observer_;
+  // Observer to get notified when network list has changed (scan complete).
+  NetworkGuidListCallback network_list_changed_observer_;
+  // Saved value of network location wizard show value.
+  scoped_ptr<DWORD> saved_nw_category_wizard_;
+  // MessageLoopProxy to post events on UI thread.
+  scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
+  // Task runner for worker tasks.
+  scoped_refptr<base::SequencedTaskRunner> task_runner_;
+  // If |false|, then |networks_changed_observer_| is not notified.
+  bool enable_notify_network_changed_;
+  // Number of attempts to check that network has connected successfully.
+  static const int kMaxAttempts = 100;
+  // Delay between attempts to check that network has connected successfully.
+  static const int kAttemptDelayMs = 100;
+  DISALLOW_COPY_AND_ASSIGN(WiFiServiceImpl);
+};
+
+WiFiServiceImpl::WiFiServiceImpl()
+    : wlan_api_library_(NULL),
+      WlanConnect_function_(NULL),
+      WlanCloseHandle_function_(NULL),
+      WlanDisconnect_function_(NULL),
+      WlanEnumInterfaces_function_(NULL),
+      WlanFreeMemory_function_(NULL),
+      WlanGetAvailableNetworkList_function_(NULL),
+      WlanGetNetworkBssList_function_(NULL),
+      WlanGetProfile_function_(NULL),
+      WlanOpenHandle_function_(NULL),
+      WlanRegisterNotification_function_(NULL),
+      WlanSaveTemporaryProfile_function_(NULL),
+      WlanScan_function_(NULL),
+      client_(NULL),
+      enable_notify_network_changed_(true) {}
+
+WiFiServiceImpl::~WiFiServiceImpl() { UnInitialize(); }
+
+void WiFiServiceImpl::Initialize(
+    scoped_refptr<base::SequencedTaskRunner> task_runner) {
+  DCHECK(!client_);
+  task_runner_.swap(task_runner);
+  // Restore NwCategoryWizard in case if we crashed during connect.
+  RestoreNwCategoryWizard();
+  OpenClientHandle();
+}
+
+void WiFiServiceImpl::UnInitialize() {
+  CloseClientHandle();
+}
+
+void WiFiServiceImpl::GetProperties(const std::string& network_guid,
+                                    DictionaryValue* properties,
+                                    std::string* error) {
+  DWORD error_code = EnsureInitialized();
+  if (error_code == ERROR_SUCCESS) {
+    NetworkList network_list;
+    error_code = GetVisibleNetworkList(&network_list);
+    if (error_code == ERROR_SUCCESS && !network_list.empty()) {
+      NetworkList::const_iterator it = FindNetwork(network_list, network_guid);
+      if (it != network_list.end()) {
+        DVLOG(1) << "Get Properties: " << network_guid << ":"
+                   << it->connection_state;
+        properties->Swap(it->ToValue(false).get());
+        return;
+      } else {
+        error_code = ERROR_NOT_FOUND;
+      }
+    }
+  }
+
+  CheckError(error_code, kWiFiServiceError, error);
+}
+
+void WiFiServiceImpl::SetProperties(
+    const std::string& network_guid,
+    scoped_ptr<base::DictionaryValue> properties,
+    std::string* error) {
+  // This method is not implemented in first version as it is not used by
+  // Google Cast extension.
+  CheckError(ERROR_CALL_NOT_IMPLEMENTED, kWiFiServiceError, error);
+}
+
+void WiFiServiceImpl::GetVisibleNetworks(ListValue* network_list) {
+  DWORD error = EnsureInitialized();
+
+  if (error == ERROR_SUCCESS) {
+    NetworkList networks;
+    error = GetVisibleNetworkList(&networks);
+    if (error == ERROR_SUCCESS && !networks.empty()) {
+      SortNetworks(&networks);
+      for (WiFiService::NetworkList::const_iterator it = networks.begin();
+           it != networks.end();
+           ++it) {
+        scoped_ptr<DictionaryValue> network(it->ToValue(true));
+        network_list->Append(network.release());
+      }
+    }
+  }
+}
+
+void WiFiServiceImpl::RequestNetworkScan() {
+  DWORD error = EnsureInitialized();
+  if (error == ERROR_SUCCESS) {
+    WlanScan_function_(client_, &interface_guid_, NULL, NULL, NULL);
+  }
+}
+
+void WiFiServiceImpl::StartConnect(const std::string& network_guid,
+                                   std::string* error) {
+  DVLOG(1) << "Start Connect: " << network_guid;
+  DWORD error_code = EnsureInitialized();
+  if (error_code == ERROR_SUCCESS) {
+    std::string connected_network_guid;
+    error_code = SaveCurrentConnectedNetwork(&connected_network_guid);
+    if (error_code == ERROR_SUCCESS) {
+      Frequency frequency = kFrequencyAny;
+      // Connect only if network |network_guid| is not connected already.
+      if (network_guid != connected_network_guid)
+        error_code = Connect(network_guid, frequency);
+      if (error_code == ERROR_SUCCESS) {
+        // Notify that previously connected network has changed.
+        NotifyNetworkChanged(connected_network_guid);
+        // Start waiting for network connection state change.
+        if (!networks_changed_observer_.is_null()) {
+          DisableNwCategoryWizard();
+          // Disable automatic network change notifications as they get fired
+          // when network is just connected, but not yet accessible (doesn't
+          // have valid IP address).
+          enable_notify_network_changed_ = false;
+          WaitForNetworkConnect(network_guid, 0);
+          return;
+        }
+      }
+    }
+  }
+  CheckError(error_code, kWiFiServiceError, error);
+}
+
+void WiFiServiceImpl::StartDisconnect(const std::string& network_guid,
+                                      std::string* error) {
+  DVLOG(1) << "Start Disconnect: " << network_guid;
+  DWORD error_code = EnsureInitialized();
+  if (error_code == ERROR_SUCCESS) {
+    std::string connected_network_guid;
+    error_code = SaveCurrentConnectedNetwork(&connected_network_guid);
+    if (error_code == ERROR_SUCCESS && network_guid == connected_network_guid) {
+      error_code = Disconnect();
+      if (error_code == ERROR_SUCCESS) {
+        NotifyNetworkChanged(network_guid);
+        return;
+      }
+    }
+  }
+  CheckError(error_code, kWiFiServiceError, error);
+}
+
+void WiFiServiceImpl::SetEventObservers(
+    scoped_refptr<base::MessageLoopProxy> message_loop_proxy,
+    const NetworkGuidListCallback& networks_changed_observer,
+    const NetworkGuidListCallback& network_list_changed_observer) {
+  message_loop_proxy_.swap(message_loop_proxy);
+  networks_changed_observer_ = networks_changed_observer;
+  network_list_changed_observer_ = network_list_changed_observer;
+}
+
+void WiFiServiceImpl::OnWlanNotificationCallback(
+    PWLAN_NOTIFICATION_DATA wlan_notification_data,
+    PVOID context) {
+  WiFiServiceImpl* service = reinterpret_cast<WiFiServiceImpl*>(context);
+  service->OnWlanNotification(wlan_notification_data);
+}
+
+void WiFiServiceImpl::OnWlanNotification(
+    PWLAN_NOTIFICATION_DATA wlan_notification_data) {
+  if (message_loop_proxy_ == NULL)
+    return;
+  switch (wlan_notification_data->NotificationCode) {
+    case wlan_notification_acm_disconnected:
+    case wlan_notification_acm_connection_complete:
+    case wlan_notification_acm_connection_attempt_fail: {
+      PWLAN_CONNECTION_NOTIFICATION_DATA wlan_connection_data =
+          reinterpret_cast<PWLAN_CONNECTION_NOTIFICATION_DATA>(
+              wlan_notification_data->pData);
+      message_loop_proxy_->PostTask(
+          FROM_HERE,
+          base::Bind(&WiFiServiceImpl::NotifyNetworkChanged,
+                     base::Unretained(this),
+                     GUIDFromSSID(wlan_connection_data->dot11Ssid)));
+      break;
+    }
+    case wlan_notification_acm_scan_complete:
+      message_loop_proxy_->PostTask(
+          FROM_HERE,
+          base::Bind(&WiFiServiceImpl::OnNetworkScanCompleteOnMainThread,
+                     base::Unretained(this)));
+      break;
+  }
+}
+
+void WiFiServiceImpl::OnNetworkScanCompleteOnMainThread() {
+  NetworkList networks;
+  // Get current list of visible networks and notify that network list has
+  // changed.
+  DWORD error = GetVisibleNetworkList(&networks);
+  DCHECK(error == ERROR_SUCCESS);
+  if (error == ERROR_SUCCESS)
+    NotifyNetworkListChanged(networks);
+}
+
+void WiFiServiceImpl::WaitForNetworkConnect(const std::string& network_guid,
+                                            int attempt) {
+  // If network didn't get connected in |kMaxAttempts|, then restore automatic
+  // network change notifications and stop waiting.
+  if (attempt > kMaxAttempts) {
+    DLOG(ERROR) << kMaxAttempts << " attempts exceeded waiting for connect to "
+                << network_guid;
+    enable_notify_network_changed_ = true;
+    RestoreNwCategoryWizard();
+    return;
+  }
+  std::string connected_network_guid;
+  DWORD error = FindConnectedNetwork(&connected_network_guid);
+  if (network_guid == connected_network_guid) {
+    DVLOG(1) << "WiFi Connected, Reset DHCP: " << network_guid;
+    // Even though wireless network is now connected, it may still be unusable,
+    // e.g. after Chromecast device reset. Reset DHCP on wireless network to
+    // work around this issue.
+    error = ResetDHCP();
+    // Restore previously suppressed notifications.
+    enable_notify_network_changed_ = true;
+    RestoreNwCategoryWizard();
+    NotifyNetworkChanged(network_guid);
+  } else {
+    // Continue waiting for network connection state change.
+    task_runner_->PostDelayedTask(
+        FROM_HERE,
+        base::Bind(&WiFiServiceImpl::WaitForNetworkConnect,
+                   base::Unretained(this),
+                   network_guid,
+                   ++attempt),
+        base::TimeDelta::FromMilliseconds(kAttemptDelayMs));
+  }
+}
+
+bool WiFiServiceImpl::CheckError(DWORD error_code,
+                                 const std::string& error_name,
+                                 std::string* error) const {
+  if (error_code != ERROR_SUCCESS) {
+    DLOG(ERROR) << "WiFiService Error " << error_code << ": " << error_name;
+    *error = error_name;
+    return true;
+  }
+  return false;
+}
+
+WiFiService::NetworkList::iterator WiFiServiceImpl::FindNetwork(
+    NetworkList& networks,
+    const std::string& network_guid) {
+  for (NetworkList::iterator it = networks.begin(); it != networks.end();
+       ++it) {
+    if (it->guid == network_guid)
+      return it;
+  }
+  return networks.end();
+}
+
+DWORD WiFiServiceImpl::SaveCurrentConnectedNetwork(
+    std::string* connected_network_guid) {
+  // Find currently connected network.
+  DWORD error = FindConnectedNetwork(connected_network_guid);
+  if (error == ERROR_SUCCESS && !connected_network_guid->empty()) {
+    if (error == ERROR_SUCCESS) {
+      SaveTempProfile(*connected_network_guid);
+      std::string profile_xml;
+      error = GetProfile(*connected_network_guid, &profile_xml);
+      if (error == ERROR_SUCCESS) {
+        saved_profiles_xml_[*connected_network_guid] = profile_xml;
+      }
+    }
+  }
+  return error;
+}
+
+void WiFiServiceImpl::SortNetworks(NetworkList* networks) {
+  networks->sort(NetworkProperties::OrderByType);
+}
+
+DWORD WiFiServiceImpl::LoadWlanLibrary() {
+  // Use an absolute path to load the DLL to avoid DLL preloading attacks.
+  base::FilePath path;
+  if (!PathService::Get(base::DIR_SYSTEM, &path)) {
+    DLOG(ERROR) << "Unable to get system path.";
+    return ERROR_NOT_FOUND;
+  }
+  wlan_api_library_ = ::LoadLibraryEx(path.Append(kWlanApiDll).value().c_str(),
+                                      NULL,
+                                      LOAD_WITH_ALTERED_SEARCH_PATH);
+  if (!wlan_api_library_) {
+    DLOG(ERROR) << "Unable to load WlanApi.dll.";
+    return ERROR_NOT_FOUND;
+  }
+
+  // Initialize WlanApi function pointers
+  WlanConnect_function_ =
+      reinterpret_cast<WlanConnectFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanConnect));
+  WlanCloseHandle_function_ =
+      reinterpret_cast<WlanCloseHandleFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanCloseHandle));
+  WlanDisconnect_function_ =
+      reinterpret_cast<WlanDisconnectFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanDisconnect));
+  WlanEnumInterfaces_function_ =
+      reinterpret_cast<WlanEnumInterfacesFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanEnumInterfaces));
+  WlanFreeMemory_function_ =
+      reinterpret_cast<WlanFreeMemoryFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanFreeMemory));
+  WlanGetAvailableNetworkList_function_ =
+      reinterpret_cast<WlanGetAvailableNetworkListFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanGetAvailableNetworkList));
+  WlanGetNetworkBssList_function_ =
+      reinterpret_cast<WlanGetNetworkBssListFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanGetNetworkBssList));
+  WlanGetProfile_function_ =
+      reinterpret_cast<WlanGetProfileFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanGetProfile));
+  WlanOpenHandle_function_ =
+      reinterpret_cast<WlanOpenHandleFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanOpenHandle));
+  WlanRegisterNotification_function_ =
+      reinterpret_cast<WlanRegisterNotificationFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanRegisterNotification));
+  WlanSaveTemporaryProfile_function_ =
+      reinterpret_cast<WlanSaveTemporaryProfileFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanSaveTemporaryProfile));
+  WlanScan_function_ =
+      reinterpret_cast<WlanScanFunction>(
+          ::GetProcAddress(wlan_api_library_, kWlanScan));
+
+  if (!WlanConnect_function_ ||
+      !WlanCloseHandle_function_ ||
+      !WlanDisconnect_function_ ||
+      !WlanEnumInterfaces_function_ ||
+      !WlanFreeMemory_function_ ||
+      !WlanGetAvailableNetworkList_function_ ||
+      !WlanGetProfile_function_ ||
+      !WlanOpenHandle_function_ ||
+      !WlanRegisterNotification_function_ ||
+      !WlanScan_function_) {
+    DLOG(ERROR) << "Unable to find required WlanApi function.";
+    FreeLibrary(wlan_api_library_);
+    wlan_api_library_ = NULL;
+    return ERROR_NOT_FOUND;
+  }
+
+  // Some WlanApi functions may not be available on XP.
+  if (!WlanGetNetworkBssList_function_ ||
+      !WlanSaveTemporaryProfile_function_) {
+    DVLOG(1) << "WlanApi function is not be available on XP.";
+  }
+
+  return ERROR_SUCCESS;
+}
+
+DWORD WiFiServiceImpl::OpenClientHandle() {
+  DWORD error = LoadWlanLibrary();
+  DWORD service_version = 0;
+
+  if (error != ERROR_SUCCESS)
+    return error;
+
+  // Open a handle to the service.
+  error = WlanOpenHandle_function_(1, NULL, &service_version, &client_);
+
+  PWLAN_INTERFACE_INFO_LIST interface_list = NULL;
+  if (error == ERROR_SUCCESS) {
+    // Enumerate wireless interfaces.
+    error = WlanEnumInterfaces_function_(client_, NULL, &interface_list);
+    if (error == ERROR_SUCCESS) {
+      if (interface_list != NULL && interface_list->dwNumberOfItems != 0) {
+        // Remember first interface just in case if none are connected.
+        interface_guid_ = interface_list->InterfaceInfo[0].InterfaceGuid;
+        // Try to find a connected interface.
+        for (DWORD itf = 0; itf < interface_list->dwNumberOfItems; ++itf) {
+          if (interface_list->InterfaceInfo[itf].isState ==
+              wlan_interface_state_connected) {
+            // Found connected interface, remember it!
+            interface_guid_ = interface_list->InterfaceInfo[itf].InterfaceGuid;
+            break;
+          }
+        }
+        WlanRegisterNotification_function_(client_,
+                                           WLAN_NOTIFICATION_SOURCE_ALL,
+                                           FALSE,
+                                           OnWlanNotificationCallback,
+                                           this,
+                                           NULL,
+                                           NULL);
+      } else {
+        error = ERROR_NOINTERFACE;
+      }
+    }
+    // Clean up.
+    if (interface_list != NULL)
+      WlanFreeMemory_function_(interface_list);
+  }
+  return error;
+}
+
+DWORD WiFiServiceImpl::ResetDHCP() {
+  IP_ADAPTER_INDEX_MAP adapter_index_map = {0};
+  DWORD error = FindAdapterIndexMapByGUID(interface_guid_, &adapter_index_map);
+  if (error == ERROR_SUCCESS) {
+    error = ::IpReleaseAddress(&adapter_index_map);
+    if (error == ERROR_SUCCESS) {
+      error = ::IpRenewAddress(&adapter_index_map);
+    }
+  }
+  return error;
+}
+
+DWORD WiFiServiceImpl::FindAdapterIndexMapByGUID(
+    const GUID& interface_guid,
+    IP_ADAPTER_INDEX_MAP* adapter_index_map) {
+  string16 guid_string;
+  const int kGUIDSize = 39;
+  ::StringFromGUID2(
+      interface_guid, WriteInto(&guid_string, kGUIDSize), kGUIDSize);
+
+  ULONG buffer_length = 0;
+  DWORD error = ::GetInterfaceInfo(NULL, &buffer_length);
+  if (error == ERROR_INSUFFICIENT_BUFFER) {
+    scoped_ptr<unsigned char[]> buffer(new unsigned char[buffer_length]);
+    IP_INTERFACE_INFO* interface_info =
+        reinterpret_cast<IP_INTERFACE_INFO*>(buffer.get());
+    error = GetInterfaceInfo(interface_info, &buffer_length);
+    if (error == ERROR_SUCCESS) {
+      for (int adapter = 0; adapter < interface_info->NumAdapters; ++adapter) {
+        if (EndsWith(
+                interface_info->Adapter[adapter].Name, guid_string, false)) {
+          *adapter_index_map = interface_info->Adapter[adapter];
+          break;
+        }
+      }
+    }
+  }
+  return error;
+}
+
+DWORD WiFiServiceImpl::DisableNwCategoryWizard() {
+  base::win::RegKey nw_category_wizard;
+  DWORD error = nw_category_wizard.Open(HKEY_CURRENT_USER,
+                                        kNwCategoryWizardRegKey,
+                                        KEY_READ | KEY_SET_VALUE);
+  if (error == ERROR_SUCCESS) {
+    // Save current value if present.
+    if (nw_category_wizard.HasValue(kNwCategoryWizardRegValue)) {
+      DWORD saved = 0u;
+      error = nw_category_wizard.ReadValueDW(kNwCategoryWizardRegValue,
+                                             &saved);
+      if (error == ERROR_SUCCESS) {
+        error = nw_category_wizard.WriteValue(kNwCategoryWizardSavedRegValue,
+                                              saved);
+      }
+    } else {
+      // Mark that temporary value has to be deleted.
+      error = nw_category_wizard.WriteValue(kNwCategoryWizardDeleteRegValue,
+                                            1u);
+    }
+
+    // Disable network location wizard.
+    error = nw_category_wizard.WriteValue(kNwCategoryWizardRegValue,
+                                          static_cast<DWORD>(0));
+  }
+
+  return error;
+}
+
+DWORD WiFiServiceImpl::RestoreNwCategoryWizard() {
+  base::win::RegKey nw_category_wizard;
+  DWORD error = nw_category_wizard.Open(HKEY_CURRENT_USER,
+                                        kNwCategoryWizardRegKey,
+                                        KEY_SET_VALUE);
+  if (error == ERROR_SUCCESS) {
+    // Restore saved value if present.
+    if (nw_category_wizard.HasValue(kNwCategoryWizardSavedRegValue)) {
+      DWORD saved = 0u;
+      error = nw_category_wizard.ReadValueDW(kNwCategoryWizardSavedRegValue,
+                                             &saved);
+      if (error == ERROR_SUCCESS) {
+        error = nw_category_wizard.WriteValue(kNwCategoryWizardRegValue,
+                                              saved);
+        error = nw_category_wizard.DeleteValue(kNwCategoryWizardSavedRegValue);
+      }
+    } else if (nw_category_wizard.HasValue(kNwCategoryWizardDeleteRegValue)) {
+      error = nw_category_wizard.DeleteValue(kNwCategoryWizardRegValue);
+      error = nw_category_wizard.DeleteValue(kNwCategoryWizardDeleteRegValue);
+    }
+  }
+
+  return error;
+}
+
+DWORD WiFiServiceImpl::EnsureInitialized() {
+  if (client_ != NULL)
+    return ERROR_SUCCESS;
+  return ERROR_NOINTERFACE;
+}
+
+DWORD WiFiServiceImpl::CloseClientHandle() {
+  DWORD error = ERROR_SUCCESS;
+  if (client_ != NULL) {
+    error = WlanCloseHandle_function_(client_, NULL);
+    client_ = NULL;
+  }
+  if (wlan_api_library_ != NULL) {
+    WlanConnect_function_ = NULL;
+    WlanCloseHandle_function_ = NULL;
+    WlanDisconnect_function_ = NULL;
+    WlanEnumInterfaces_function_ = NULL;
+    WlanFreeMemory_function_ = NULL;
+    WlanGetAvailableNetworkList_function_ = NULL;
+    WlanGetNetworkBssList_function_ = NULL;
+    WlanGetProfile_function_ = NULL;
+    WlanOpenHandle_function_ = NULL;
+    WlanRegisterNotification_function_ = NULL;
+    WlanSaveTemporaryProfile_function_ = NULL;
+    WlanScan_function_ = NULL;
+    ::FreeLibrary(wlan_api_library_);
+    wlan_api_library_ = NULL;
+  }
+  return error;
+}
+
+DOT11_SSID WiFiServiceImpl::SSIDFromGUID(
+    const std::string& network_guid) const {
+  DOT11_SSID ssid = {0};
+  if (network_guid.length() <= DOT11_SSID_MAX_LENGTH) {
+    ssid.uSSIDLength = static_cast<ULONG>(network_guid.length());
+    strncpy(reinterpret_cast<char*>(ssid.ucSSID),
+            network_guid.c_str(),
+            ssid.uSSIDLength);
+  } else {
+    NOTREACHED();
+  }
+  return ssid;
+}
+
+std::string WiFiServiceImpl::SecurityFromDot11AuthAlg(
+    DOT11_AUTH_ALGORITHM alg) const {
+  switch (alg) {
+    case DOT11_AUTH_ALGO_RSNA:
+      return onc::wifi::kWPA_EAP;
+    case DOT11_AUTH_ALGO_RSNA_PSK:
+      return onc::wifi::kWPA_PSK;
+    case DOT11_AUTH_ALGO_80211_SHARED_KEY:
+      return onc::wifi::kWEP_PSK;
+    case DOT11_AUTH_ALGO_80211_OPEN:
+      return onc::wifi::kNone;
+    default:
+      return onc::wifi::kWPA_EAP;
+  }
+}
+
+void WiFiServiceImpl::NetworkPropertiesFromAvailableNetwork(
+    const WLAN_AVAILABLE_NETWORK& wlan,
+    const WLAN_BSS_LIST& wlan_bss_list,
+    NetworkProperties* properties) {
+  if (wlan.dwFlags & WLAN_AVAILABLE_NETWORK_CONNECTED) {
+    properties->connection_state = onc::connection_state::kConnected;
+  } else {
+    properties->connection_state = onc::connection_state::kNotConnected;
+  }
+
+  properties->ssid = SSIDFromWLAN(wlan);
+  properties->name = properties->ssid;
+  properties->guid = GUIDFromWLAN(wlan);
+  properties->type = onc::network_type::kWiFi;
+
+  for (size_t bss = 0; bss < wlan_bss_list.dwNumberOfItems; ++bss) {
+    const WLAN_BSS_ENTRY& bss_entry(wlan_bss_list.wlanBssEntries[bss]);
+    if (bss_entry.dot11Ssid.uSSIDLength == wlan.dot11Ssid.uSSIDLength &&
+        0 == memcmp(bss_entry.dot11Ssid.ucSSID,
+                    wlan.dot11Ssid.ucSSID,
+                    bss_entry.dot11Ssid.uSSIDLength)) {
+      if (bss_entry.ulChCenterFrequency < 3000000)
+        properties->frequency = kFrequency2400;
+      else
+        properties->frequency = kFrequency5000;
+      properties->frequency_list.push_back(properties->frequency);
+      properties->bssid = NetworkProperties::MacAddressAsString(
+          bss_entry.dot11Bssid);
+    }
+  }
+  properties->frequency_list.sort();
+  properties->frequency_list.unique();
+  properties->security =
+      SecurityFromDot11AuthAlg(wlan.dot11DefaultAuthAlgorithm);
+  properties->signal_strength = wlan.wlanSignalQuality;
+}
+
+// Get the list of visible wireless networks
+DWORD WiFiServiceImpl::GetVisibleNetworkList(NetworkList* network_list) {
+  if (client_ == NULL) {
+    NOTREACHED();
+    return ERROR_NOINTERFACE;
+  }
+
+  DWORD error = ERROR_SUCCESS;
+  PWLAN_AVAILABLE_NETWORK_LIST available_network_list = NULL;
+  PWLAN_BSS_LIST bss_list = NULL;
+
+  error = WlanGetAvailableNetworkList_function_(
+      client_,
+      &interface_guid_,
+      WLAN_AVAILABLE_NETWORK_INCLUDE_ALL_MANUAL_HIDDEN_PROFILES,
+      NULL,
+      &available_network_list);
+
+  std::set<std::string> network_guids;
+
+  if (error == ERROR_SUCCESS &&
+      available_network_list &&
+      WlanGetNetworkBssList_function_) {
+    // TODO(mef): WlanGetNetworkBssList is not available on XP. If XP support is
+    // needed, then different method of getting BSS (e.g. OID query) will have
+    // to be used.
+    error = WlanGetNetworkBssList_function_(client_,
+                                            &interface_guid_,
+                                            NULL,
+                                            dot11_BSS_type_any,
+                                            FALSE,
+                                            NULL,
+                                            &bss_list);
+    if (error == ERROR_SUCCESS && NULL != bss_list) {
+      for (DWORD i = 0; i < available_network_list->dwNumberOfItems; ++i) {
+        NetworkProperties network_properties;
+        NetworkPropertiesFromAvailableNetwork(
+            available_network_list->Network[i],
+            *bss_list,
+            &network_properties);
+        // Check for duplicate network guids.
+        if (network_guids.count(network_properties.guid)) {
+          // There should be no difference between properties except for
+          // |connection_state|, so mark it as |kConnected| if either one is.
+          if (network_properties.connection_state ==
+              onc::connection_state::kConnected) {
+            NetworkList::iterator previous_network_properties =
+                FindNetwork(*network_list, network_properties.guid);
+            DCHECK(previous_network_properties != network_list->end());
+            previous_network_properties->connection_state =
+                network_properties.connection_state;
+          }
+        } else {
+          network_list->push_back(network_properties);
+        }
+        network_guids.insert(network_properties.guid);
+      }
+    }
+  }
+
+  // clean up
+  if (available_network_list != NULL) {
+    WlanFreeMemory_function_(available_network_list);
+  }
+  if (bss_list != NULL) {
+    WlanFreeMemory_function_(bss_list);
+  }
+  return error;
+}
+
+// Find currently connected network.
+DWORD WiFiServiceImpl::FindConnectedNetwork(
+    std::string* connected_network_guid) {
+  if (client_ == NULL) {
+    NOTREACHED();
+    return ERROR_NOINTERFACE;
+  }
+
+  DWORD error = ERROR_SUCCESS;
+  PWLAN_AVAILABLE_NETWORK_LIST available_network_list = NULL;
+  error = WlanGetAvailableNetworkList_function_(
+      client_, &interface_guid_, 0, NULL, &available_network_list);
+
+  if (error == ERROR_SUCCESS && NULL != available_network_list) {
+    for (DWORD i = 0; i < available_network_list->dwNumberOfItems; ++i) {
+      const WLAN_AVAILABLE_NETWORK& wlan = available_network_list->Network[i];
+      if (wlan.dwFlags & WLAN_AVAILABLE_NETWORK_CONNECTED) {
+        *connected_network_guid = GUIDFromWLAN(wlan);
+        break;
+      }
+    }
+  }
+
+  // clean up
+  if (available_network_list != NULL) {
+    WlanFreeMemory_function_(available_network_list);
+  }
+
+  return error;
+}
+
+DWORD WiFiServiceImpl::GetDesiredBssList(
+    DOT11_SSID& ssid,
+    Frequency frequency,
+    scoped_ptr<DOT11_BSSID_LIST>* desired_list) {
+  if (client_ == NULL) {
+    NOTREACHED();
+    return ERROR_NOINTERFACE;
+  }
+
+  desired_list->reset();
+
+  if (frequency == kFrequencyAny)
+    return ERROR_SUCCESS;
+
+  // TODO(mef): WlanGetNetworkBssList is not available on XP. If XP support is
+  // needed, then different method of getting BSS (e.g. OID query) will have
+  // to be used.
+  if (!WlanGetNetworkBssList_function_)
+    return ERROR_NOT_SUPPORTED;
+
+  DWORD error = ERROR_SUCCESS;
+  PWLAN_BSS_LIST bss_list = NULL;
+
+  error = WlanGetNetworkBssList_function_(client_,
+                                          &interface_guid_,
+                                          NULL,
+                                          dot11_BSS_type_any,
+                                          FALSE,
+                                          NULL,
+                                          &bss_list);
+  if (error == ERROR_SUCCESS && NULL != bss_list) {
+    unsigned int best_quality = 0u;
+    size_t best_index = 0;
+    Frequency bss_frequency;
+
+    // Go through bss_list and find best quality BSSID with matching frequency.
+    for (size_t bss = 0; bss < bss_list->dwNumberOfItems; ++bss) {
+      const WLAN_BSS_ENTRY& bss_entry(bss_list->wlanBssEntries[bss]);
+      if (bss_entry.dot11Ssid.uSSIDLength != ssid.uSSIDLength ||
+          0 != memcmp(bss_entry.dot11Ssid.ucSSID,
+                      ssid.ucSSID,
+                      bss_entry.dot11Ssid.uSSIDLength))
+        continue;
+
+      if (bss_entry.ulChCenterFrequency < 3000000)
+        bss_frequency = kFrequency2400;
+      else
+        bss_frequency = kFrequency5000;
+
+      if (bss_frequency == frequency &&
+          bss_entry.uLinkQuality > best_quality) {
+        best_quality = bss_entry.uLinkQuality;
+        best_index = bss;
+      }
+    }
+
+    // If any matching BSS were found, prepare the header.
+    if (best_quality > 0) {
+      const WLAN_BSS_ENTRY& bss_entry(bss_list->wlanBssEntries[best_index]);
+      scoped_ptr<DOT11_BSSID_LIST> selected_list(new DOT11_BSSID_LIST);
+
+      selected_list->Header.Revision = DOT11_BSSID_LIST_REVISION_1;
+      selected_list->Header.Size = sizeof(DOT11_BSSID_LIST);
+      selected_list->Header.Type = NDIS_OBJECT_TYPE_DEFAULT;
+      selected_list->uNumOfEntries = 1;
+      selected_list->uTotalNumOfEntries = 1;
+      std::copy(bss_entry.dot11Bssid,
+                bss_entry.dot11Bssid+sizeof(bss_entry.dot11Bssid),
+                selected_list->BSSIDs[0]);
+      desired_list->swap(selected_list);
+      DVLOG(1) << "Quality: " << best_quality << " BSS: "
+          << NetworkProperties::MacAddressAsString(bss_entry.dot11Bssid);
+    } else {
+      error = ERROR_NOT_FOUND;
+    }
+  }
+
+  // clean up
+  if (bss_list != NULL) {
+    WlanFreeMemory_function_(bss_list);
+  }
+  return error;
+}
+
+
+DWORD WiFiServiceImpl::Connect(const std::string& network_guid,
+                               Frequency frequency) {
+  if (client_ == NULL) {
+    NOTREACHED();
+    return ERROR_NOINTERFACE;
+  }
+
+  DWORD error = ERROR_SUCCESS;
+  DOT11_SSID ssid = SSIDFromGUID(network_guid);
+  scoped_ptr<DOT11_BSSID_LIST> desired_bss_list;
+  error = GetDesiredBssList(ssid, frequency, &desired_bss_list);
+  if (error == ERROR_SUCCESS) {
+    if (HaveProfile(network_guid)) {
+      base::string16 profile_name = ProfileNameFromGUID(network_guid);
+      WLAN_CONNECTION_PARAMETERS wlan_params = {
+          wlan_connection_mode_profile,
+          profile_name.c_str(),
+          NULL,
+          desired_bss_list.get(),
+          dot11_BSS_type_any,
+          0};
+      error = WlanConnect_function_(
+          client_, &interface_guid_, &wlan_params, NULL);
+    } else {
+      // TODO(mef): wlan_connection_mode_discovery_unsecure is not available on
+      // XP. If XP support is needed, then temporary profile will have to be
+      // created.
+      WLAN_CONNECTION_PARAMETERS wlan_params = {
+          wlan_connection_mode_discovery_unsecure,
+          NULL,
+          &ssid,
+          desired_bss_list.get(),
+          dot11_BSS_type_infrastructure,
+          0};
+      error = WlanConnect_function_(
+          client_, &interface_guid_, &wlan_params, NULL);
+    }
+  }
+
+  return error;
+}
+
+DWORD WiFiServiceImpl::Disconnect() {
+  if (client_ == NULL) {
+    NOTREACHED();
+    return ERROR_NOINTERFACE;
+  }
+
+  DWORD error = ERROR_SUCCESS;
+  error = WlanDisconnect_function_(client_, &interface_guid_, NULL);
+  return error;
+}
+
+DWORD WiFiServiceImpl::SaveTempProfile(const std::string& network_guid) {
+  if (client_ == NULL) {
+    NOTREACHED();
+    return ERROR_NOINTERFACE;
+  }
+
+  DWORD error = ERROR_SUCCESS;
+  base::string16 profile_name = ProfileNameFromGUID(network_guid);
+  // TODO(mef): WlanSaveTemporaryProfile is not available on XP. If XP support
+  // is needed, then different method of saving network profile will have to be
+  // used.
+  if (WlanSaveTemporaryProfile_function_) {
+    error = WlanSaveTemporaryProfile_function_(client_,
+                                               &interface_guid_,
+                                               profile_name.c_str(),
+                                               NULL,
+                                               WLAN_PROFILE_USER,
+                                               true,
+                                               NULL);
+  } else {
+    error = ERROR_NOT_SUPPORTED;
+  }
+  return error;
+}
+
+DWORD WiFiServiceImpl::GetProfile(const std::string& network_guid,
+                                  std::string* profile_xml) {
+  if (client_ == NULL) {
+    NOTREACHED();
+    return ERROR_NOINTERFACE;
+  }
+
+  DWORD error = ERROR_SUCCESS;
+  base::string16 profile_name = ProfileNameFromGUID(network_guid);
+  LPWSTR str_profile_xml = NULL;
+  error = WlanGetProfile_function_(client_,
+                                   &interface_guid_,
+                                   profile_name.c_str(),
+                                   NULL,
+                                   &str_profile_xml,
+                                   NULL,
+                                   NULL);
+
+  if (error == ERROR_SUCCESS && str_profile_xml != NULL) {
+    *profile_xml = base::UTF16ToUTF8(str_profile_xml);
+  }
+  // clean up
+  if (str_profile_xml != NULL) {
+    WlanFreeMemory_function_(str_profile_xml);
+  }
+
+  return error;
+}
+
+bool WiFiServiceImpl::HaveProfile(const std::string& network_guid) {
+  DWORD error = ERROR_SUCCESS;
+  std::string profile_xml;
+  return GetProfile(network_guid, &profile_xml) == ERROR_SUCCESS;
+}
+
+void WiFiServiceImpl::NotifyNetworkListChanged(const NetworkList& networks) {
+  if (network_list_changed_observer_.is_null())
+    return;
+
+  NetworkGuidList current_networks;
+  for (NetworkList::const_iterator it = networks.begin();
+       it != networks.end();
+       ++it) {
+    current_networks.push_back(it->guid);
+  }
+
+  message_loop_proxy_->PostTask(
+      FROM_HERE,
+      base::Bind(network_list_changed_observer_, current_networks));
+}
+
+void WiFiServiceImpl::NotifyNetworkChanged(const std::string& network_guid) {
+  if (enable_notify_network_changed_ && !networks_changed_observer_.is_null()) {
+    DVLOG(1) << "NotifyNetworkChanged: " << network_guid;
+    NetworkGuidList changed_networks(1, network_guid);
+    message_loop_proxy_->PostTask(
+        FROM_HERE,
+        base::Bind(networks_changed_observer_, changed_networks));
+  }
+}
+
+WiFiService* WiFiService::Create() { return new WiFiServiceImpl(); }
+
+}  // namespace wifi