Index: device/geolocation/wifi_data_provider_win.cc |
diff --git a/device/geolocation/wifi_data_provider_win.cc b/device/geolocation/wifi_data_provider_win.cc |
index 8b296ae1f4e84d546b2063be834608a05dc25a6e..908d06c4f54e783f4d23de3e4e74446debdb9695 100644 |
--- a/device/geolocation/wifi_data_provider_win.cc |
+++ b/device/geolocation/wifi_data_provider_win.cc |
@@ -2,25 +2,6 @@ |
// Use of this source code is governed by a BSD-style license that can be |
// found in the LICENSE file. |
-// Windows Vista uses the Native Wifi (WLAN) API for accessing WiFi cards. See |
-// http://msdn.microsoft.com/en-us/library/ms705945(VS.85).aspx. Windows XP |
-// Service Pack 3 (and Windows XP Service Pack 2, if upgraded with a hot fix) |
-// also support a limited version of the WLAN API. See |
-// http://msdn.microsoft.com/en-us/library/bb204766.aspx. The WLAN API uses |
-// wlanapi.h, which is not part of the SDK used by Gears, so is replicated |
-// locally using data from the MSDN. |
-// |
-// Windows XP from Service Pack 2 onwards supports the Wireless Zero |
-// Configuration (WZC) programming interface. See |
-// http://msdn.microsoft.com/en-us/library/ms706587(VS.85).aspx. |
-// |
-// The MSDN recommends that one use the WLAN API where available, and WZC |
-// otherwise. |
-// |
-// However, it seems that WZC fails for some wireless cards. Also, WLAN seems |
-// not to work on XP SP3. So we use WLAN on Vista, and use NDIS directly |
-// otherwise. |
- |
#include "device/geolocation/wifi_data_provider_win.h" |
#include <windows.h> |
@@ -31,29 +12,20 @@ |
#include "base/memory/ptr_util.h" |
#include "base/metrics/histogram_macros.h" |
#include "base/strings/utf_string_conversions.h" |
+#include "base/timer/elapsed_timer.h" |
#include "base/win/windows_version.h" |
#include "device/geolocation/wifi_data_provider_common.h" |
#include "device/geolocation/wifi_data_provider_common_win.h" |
#include "device/geolocation/wifi_data_provider_manager.h" |
-// Taken from ndis.h for WinCE. |
-#define NDIS_STATUS_INVALID_LENGTH ((NDIS_STATUS)0xC0010014L) |
-#define NDIS_STATUS_BUFFER_TOO_SHORT ((NDIS_STATUS)0xC0010016L) |
- |
namespace device { |
-namespace { |
-// The limits on the size of the buffer used for the OID query. |
-const int kInitialBufferSize = 2 << 12; // Good for about 50 APs. |
-const int kMaximumBufferSize = 2 << 20; // 2MB |
-// Length for generic string buffers passed to Windows APIs. |
-const int kStringLength = 512; |
+namespace { |
-// The time periods, in milliseconds, between successive polls of the wifi data. |
-const int kDefaultPollingInterval = 10000; // 10s |
-const int kNoChangePollingInterval = 120000; // 2 mins |
-const int kTwoNoChangePollingInterval = 600000; // 10 mins |
-const int kNoWifiPollingIntervalMilliseconds = 20 * 1000; // 20s |
+static const int kDefaultPollingIntervalMs = 10 * 1000; // 10s |
+static const int kNoChangePollingIntervalMs = 2 * 60 * 1000; // 2 mins |
+static const int kTwoNoChangePollingIntervalMs = 10 * 60 * 1000; // 10 mins |
+static const int kNoWifiPollingIntervalMs = 20 * 1000; // 20s |
// WlanOpenHandle |
typedef DWORD(WINAPI* WlanOpenHandleFunction)(DWORD dwClientVersion, |
@@ -84,29 +56,47 @@ typedef VOID(WINAPI* WlanFreeMemoryFunction)(PVOID pMemory); |
typedef DWORD(WINAPI* WlanCloseHandleFunction)(HANDLE hClientHandle, |
PVOID pReserved); |
-// Local classes and functions |
+// Extracts data for an access point and converts to AccessPointData. |
+AccessPointData GetNetworkData(const WLAN_BSS_ENTRY& bss_entry) { |
+ AccessPointData access_point_data; |
+ // Currently we get only MAC address, signal strength and SSID. |
+ access_point_data.mac_address = MacAddressAsString16(bss_entry.dot11Bssid); |
+ access_point_data.radio_signal_strength = bss_entry.lRssi; |
+ // bss_entry.dot11Ssid.ucSSID is not null-terminated. |
+ base::UTF8ToUTF16(reinterpret_cast<const char*>(bss_entry.dot11Ssid.ucSSID), |
+ static_cast<ULONG>(bss_entry.dot11Ssid.uSSIDLength), |
+ &access_point_data.ssid); |
+ |
+ // TODO(steveblock): Is it possible to get the following? |
+ // access_point_data.signal_to_noise |
+ // access_point_data.age |
+ // access_point_data.channel |
+ return access_point_data; |
+} |
+ |
+// This class encapsulates loading and interacting with wlan_api.dll, which can |
+// not be loaded statically because it's not available in Server 2008 R2, where |
+// it must be installed explicitly by the user if and when they wants to use the |
+// Wireless interface. |
+// https://www.bonusbits.com/wiki/KB:Wlanapi.dll_missing_on_Windows_Server_2008_R2 |
class WindowsWlanApi : public WifiDataProviderCommon::WlanApiInterface { |
public: |
- // Factory function. Will return NULL if this API is unavailable. |
static std::unique_ptr<WindowsWlanApi> Create(); |
// Takes ownership of the library handle. |
explicit WindowsWlanApi(HINSTANCE library); |
~WindowsWlanApi() override; |
- // WlanApiInterface |
+ // WlanApiInterface implementation |
bool GetAccessPointData(WifiData::AccessPointDataSet* data) override; |
private: |
- // Loads the required functions from the DLL. |
- void GetWLANFunctions(HINSTANCE wlan_library); |
- int GetInterfaceDataWLAN(HANDLE wlan_handle, |
- const GUID& interface_id, |
- WifiData::AccessPointDataSet* data); |
- |
// Logs number of detected wlan interfaces. |
static void LogWlanInterfaceCount(int count); |
+ bool GetInterfaceDataWLAN(HANDLE wlan_handle, |
+ const GUID& interface_id, |
+ WifiData::AccessPointDataSet* data); |
// Handle to the wlanapi.dll library. |
HINSTANCE library_; |
@@ -118,130 +108,56 @@ class WindowsWlanApi : public WifiDataProviderCommon::WlanApiInterface { |
WlanCloseHandleFunction WlanCloseHandle_function_; |
}; |
-class WindowsNdisApi : public WifiDataProviderCommon::WlanApiInterface { |
- public: |
- static std::unique_ptr<WindowsNdisApi> Create(); |
- |
- // Swaps in content of the vector passed |
- explicit WindowsNdisApi(std::vector<base::string16>* interface_service_names); |
- ~WindowsNdisApi() override; |
- |
- // WlanApiInterface |
- bool GetAccessPointData(WifiData::AccessPointDataSet* data) override; |
- |
- private: |
- static bool GetInterfacesNDIS( |
- std::vector<base::string16>* interface_service_names_out); |
- bool GetInterfaceDataNDIS(HANDLE adapter_handle, |
- WifiData::AccessPointDataSet* data); |
- // NDIS variables. |
- std::vector<base::string16> interface_service_names_; |
- |
- // Remembers scan result buffer size across calls. |
- int oid_buffer_size_; |
-}; |
- |
-// Extracts data for an access point and converts to Gears format. |
-bool GetNetworkData(const WLAN_BSS_ENTRY& bss_entry, |
- AccessPointData* access_point_data); |
-bool UndefineDosDevice(const base::string16& device_name); |
-bool DefineDosDeviceIfNotExists(const base::string16& device_name); |
-HANDLE GetFileHandle(const base::string16& device_name); |
-// Makes the OID query and returns a Windows API error code. |
-int PerformQuery(HANDLE adapter_handle, |
- BYTE* buffer, |
- DWORD buffer_size, |
- DWORD* bytes_out); |
-bool ResizeBuffer(int requested_size, |
- std::unique_ptr<BYTE, base::FreeDeleter>* buffer); |
-// Gets the system directory and appends a trailing slash if not already |
-// present. |
-bool GetSystemDirectory(base::string16* path); |
-} // anonymous namespace |
- |
-WifiDataProvider* WifiDataProviderManager::DefaultFactoryFunction() { |
- return new WifiDataProviderWin(); |
-} |
- |
-WifiDataProviderWin::WifiDataProviderWin() {} |
- |
-WifiDataProviderWin::~WifiDataProviderWin() {} |
- |
-std::unique_ptr<WifiDataProviderCommon::WlanApiInterface> |
-WifiDataProviderWin::CreateWlanApi() { |
- // Use the WLAN interface if we're on Vista and if it's available. Otherwise, |
- // use NDIS. |
- std::unique_ptr<WlanApiInterface> api = WindowsWlanApi::Create(); |
- if (api) |
- return api; |
- return WindowsNdisApi::Create(); |
-} |
- |
-std::unique_ptr<WifiPollingPolicy> WifiDataProviderWin::CreatePollingPolicy() { |
- return base::MakeUnique<GenericWifiPollingPolicy< |
- kDefaultPollingInterval, kNoChangePollingInterval, |
- kTwoNoChangePollingInterval, kNoWifiPollingIntervalMilliseconds>>(); |
-} |
- |
-// Local classes and functions |
-namespace { |
- |
-// WindowsWlanApi |
-WindowsWlanApi::WindowsWlanApi(HINSTANCE library) : library_(library) { |
- GetWLANFunctions(library_); |
-} |
- |
-WindowsWlanApi::~WindowsWlanApi() { |
- FreeLibrary(library_); |
-} |
- |
+// static |
std::unique_ptr<WindowsWlanApi> WindowsWlanApi::Create() { |
- if (base::win::GetVersion() < base::win::VERSION_VISTA) |
- return nullptr; |
- // We use an absolute path to load the DLL to avoid DLL preloading attacks. |
- base::string16 system_directory; |
- if (!GetSystemDirectory(&system_directory)) |
- return nullptr; |
- DCHECK(!system_directory.empty()); |
- base::string16 dll_path = system_directory + L"wlanapi.dll"; |
- HINSTANCE library = |
- LoadLibraryEx(dll_path.c_str(), NULL, LOAD_WITH_ALTERED_SEARCH_PATH); |
+ // Use an absolute path to load the DLL to avoid DLL preloading attacks. |
+ static const wchar_t* const kDLL = L"%WINDIR%\\system32\\wlanapi.dll"; |
+ wchar_t path[MAX_PATH] = {0}; |
+ ExpandEnvironmentStrings(kDLL, path, arraysize(path)); |
+ HINSTANCE library = LoadLibraryEx(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH); |
if (!library) |
return nullptr; |
return base::MakeUnique<WindowsWlanApi>(library); |
} |
-void WindowsWlanApi::GetWLANFunctions(HINSTANCE wlan_library) { |
- DCHECK(wlan_library); |
+WindowsWlanApi::WindowsWlanApi(HINSTANCE library) : library_(library) { |
+ DCHECK(library_); |
+ // Extract all methods from |library_|. |
WlanOpenHandle_function_ = reinterpret_cast<WlanOpenHandleFunction>( |
- GetProcAddress(wlan_library, "WlanOpenHandle")); |
+ GetProcAddress(library_, "WlanOpenHandle")); |
WlanEnumInterfaces_function_ = reinterpret_cast<WlanEnumInterfacesFunction>( |
- GetProcAddress(wlan_library, "WlanEnumInterfaces")); |
+ GetProcAddress(library_, "WlanEnumInterfaces")); |
WlanGetNetworkBssList_function_ = |
reinterpret_cast<WlanGetNetworkBssListFunction>( |
- GetProcAddress(wlan_library, "WlanGetNetworkBssList")); |
+ GetProcAddress(library_, "WlanGetNetworkBssList")); |
WlanFreeMemory_function_ = reinterpret_cast<WlanFreeMemoryFunction>( |
- GetProcAddress(wlan_library, "WlanFreeMemory")); |
+ GetProcAddress(library_, "WlanFreeMemory")); |
WlanCloseHandle_function_ = reinterpret_cast<WlanCloseHandleFunction>( |
- GetProcAddress(wlan_library, "WlanCloseHandle")); |
+ GetProcAddress(library_, "WlanCloseHandle")); |
+ |
DCHECK(WlanOpenHandle_function_ && WlanEnumInterfaces_function_ && |
WlanGetNetworkBssList_function_ && WlanFreeMemory_function_ && |
WlanCloseHandle_function_); |
} |
+WindowsWlanApi::~WindowsWlanApi() { |
+ FreeLibrary(library_); |
+} |
+ |
+// static |
void WindowsWlanApi::LogWlanInterfaceCount(int count) { |
- UMA_HISTOGRAM_CUSTOM_COUNTS("Net.Wifi.InterfaceCount", count, 1, 5, 6); |
+ UMA_HISTOGRAM_CUSTOM_COUNTS("Net.Wifi.InterfaceCount", count, 1 /* min */, |
+ 5 /* max */, 6 /* bucket_count */); |
} |
bool WindowsWlanApi::GetAccessPointData(WifiData::AccessPointDataSet* data) { |
DCHECK(data); |
- // Get the handle to the WLAN API. |
DWORD negotiated_version; |
- HANDLE wlan_handle = NULL; |
- // We could be executing on either Windows XP or Windows Vista, so use the |
- // lower version of the client WLAN API. It seems that the negotiated version |
- // is the Vista version irrespective of what we pass! |
+ HANDLE wlan_handle = nullptr; |
+ // Highest WLAN API version supported by the client; pass the lowest. It seems |
+ // that the negotiated version is the Vista version (the highest) irrespective |
+ // of what we pass! |
static const int kXpWlanClientVersion = 1; |
if ((*WlanOpenHandle_function_)(kXpWlanClientVersion, NULL, |
&negotiated_version, |
@@ -251,8 +167,8 @@ bool WindowsWlanApi::GetAccessPointData(WifiData::AccessPointDataSet* data) { |
} |
DCHECK(wlan_handle); |
- // Get the list of interfaces. WlanEnumInterfaces allocates interface_list. |
- WLAN_INTERFACE_INFO_LIST* interface_list = NULL; |
+ // Get the list of interfaces. WlanEnumInterfaces allocates |interface_list|. |
+ WLAN_INTERFACE_INFO_LIST* interface_list = nullptr; |
if ((*WlanEnumInterfaces_function_)(wlan_handle, NULL, &interface_list) != |
ERROR_SUCCESS) { |
LogWlanInterfaceCount(0); |
@@ -263,324 +179,78 @@ bool WindowsWlanApi::GetAccessPointData(WifiData::AccessPointDataSet* data) { |
LogWlanInterfaceCount(interface_list->dwNumberOfItems); |
// Go through the list of interfaces and get the data for each. |
- for (int i = 0; i < static_cast<int>(interface_list->dwNumberOfItems); ++i) { |
+ for (size_t i = 0; i < interface_list->dwNumberOfItems; ++i) { |
+ const WLAN_INTERFACE_INFO interface_info = interface_list->InterfaceInfo[i]; |
+ |
// Skip any interface that is midway through association; the |
// WlanGetNetworkBssList function call is known to hang indefinitely |
- // when it's in this state. http://crbug.com/39300 |
- if (interface_list->InterfaceInfo[i].isState == |
- wlan_interface_state_associating) { |
- LOG(WARNING) << "Skipping wifi scan on adapter " << i << " (" |
- << interface_list->InterfaceInfo[i].strInterfaceDescription |
- << ") in 'associating' state. Repeated occurrences " |
- "indicates a non-responding adapter."; |
+ // when it's in this state. https://crbug.com/39300 |
+ if (interface_info.isState == wlan_interface_state_associating) { |
+ DLOG(WARNING) << "Skipping wifi scan on adapter " << i << " (" |
+ << interface_info.strInterfaceDescription |
+ << ") in 'associating' state. Repeated occurrences " |
+ "indicates a non-responding adapter."; |
continue; |
} |
- GetInterfaceDataWLAN(wlan_handle, |
- interface_list->InterfaceInfo[i].InterfaceGuid, data); |
+ GetInterfaceDataWLAN(wlan_handle, interface_info.InterfaceGuid, data); |
} |
- // Free interface_list. |
(*WlanFreeMemory_function_)(interface_list); |
- // Close the handle. |
- if ((*WlanCloseHandle_function_)(wlan_handle, NULL) != ERROR_SUCCESS) { |
- return false; |
- } |
- |
- return true; |
+ return (*WlanCloseHandle_function_)(wlan_handle, NULL) == ERROR_SUCCESS; |
} |
-// Appends the data for a single interface to the data vector. Returns the |
-// number of access points found, or -1 on error. |
-int WindowsWlanApi::GetInterfaceDataWLAN(const HANDLE wlan_handle, |
- const GUID& interface_id, |
- WifiData::AccessPointDataSet* data) { |
- DCHECK(data); |
- |
- const base::TimeTicks start_time = base::TimeTicks::Now(); |
- |
- // WlanGetNetworkBssList allocates bss_list. |
- WLAN_BSS_LIST* bss_list = NULL; |
+// Appends the data for a single interface to |data|. Returns false for error. |
+bool WindowsWlanApi::GetInterfaceDataWLAN(const HANDLE wlan_handle, |
+ const GUID& interface_id, |
+ WifiData::AccessPointDataSet* data) { |
+ base::ElapsedTimer wlan_get_network_list_timer; |
+ // WlanGetNetworkBssList allocates |bss_list|. |
+ WLAN_BSS_LIST* bss_list = nullptr; |
if ((*WlanGetNetworkBssList_function_)(wlan_handle, &interface_id, |
NULL, // Use all SSIDs. |
dot11_BSS_type_any, |
false, // bSecurityEnabled - unused |
NULL, // reserved |
&bss_list) != ERROR_SUCCESS) { |
- return -1; |
+ return false; |
} |
- // According to http://www.attnetclient.com/kb/questions.php?questionid=75 |
- // WlanGetNetworkBssList can sometimes return success, but leave the bss |
- // list as NULL. |
+ // WlanGetNetworkBssList() can return success without filling |bss_list|. |
if (!bss_list) |
- return -1; |
- |
- const base::TimeDelta duration = base::TimeTicks::Now() - start_time; |
+ return false; |
- UMA_HISTOGRAM_CUSTOM_TIMES("Net.Wifi.ScanLatency", duration, |
+ UMA_HISTOGRAM_CUSTOM_TIMES("Net.Wifi.ScanLatency", |
+ wlan_get_network_list_timer.Elapsed(), |
base::TimeDelta::FromMilliseconds(1), |
base::TimeDelta::FromMinutes(1), 100); |
- int found = 0; |
- for (int i = 0; i < static_cast<int>(bss_list->dwNumberOfItems); ++i) { |
- AccessPointData access_point_data; |
- if (GetNetworkData(bss_list->wlanBssEntries[i], &access_point_data)) { |
- ++found; |
- data->insert(access_point_data); |
- } |
- } |
+ for (size_t i = 0; i < bss_list->dwNumberOfItems; ++i) |
+ data->insert(GetNetworkData(bss_list->wlanBssEntries[i])); |
(*WlanFreeMemory_function_)(bss_list); |
- return found; |
-} |
- |
-// WindowsNdisApi |
-WindowsNdisApi::WindowsNdisApi( |
- std::vector<base::string16>* interface_service_names) |
- : oid_buffer_size_(kInitialBufferSize) { |
- DCHECK(!interface_service_names->empty()); |
- interface_service_names_.swap(*interface_service_names); |
-} |
- |
-WindowsNdisApi::~WindowsNdisApi() {} |
- |
-std::unique_ptr<WindowsNdisApi> WindowsNdisApi::Create() { |
- std::vector<base::string16> interface_service_names; |
- if (GetInterfacesNDIS(&interface_service_names)) |
- return base::MakeUnique<WindowsNdisApi>(&interface_service_names); |
- return nullptr; |
-} |
- |
-bool WindowsNdisApi::GetAccessPointData(WifiData::AccessPointDataSet* data) { |
- DCHECK(data); |
- int interfaces_failed = 0; |
- int interfaces_succeeded = 0; |
- |
- for (int i = 0; i < static_cast<int>(interface_service_names_.size()); ++i) { |
- // First, check that we have a DOS device for this adapter. |
- if (!DefineDosDeviceIfNotExists(interface_service_names_[i])) |
- continue; |
- |
- // Get the handle to the device. This will fail if the named device is not |
- // valid. |
- HANDLE adapter_handle = GetFileHandle(interface_service_names_[i]); |
- if (adapter_handle == INVALID_HANDLE_VALUE) |
- continue; |
- |
- // Get the data. |
- if (GetInterfaceDataNDIS(adapter_handle, data)) |
- ++interfaces_succeeded; |
- else |
- ++interfaces_failed; |
- |
- // Clean up. |
- CloseHandle(adapter_handle); |
- UndefineDosDevice(interface_service_names_[i]); |
- } |
- |
- // Return true if at least one interface succeeded, or at the very least none |
- // failed. |
- return interfaces_succeeded > 0 || interfaces_failed == 0; |
-} |
- |
-bool WindowsNdisApi::GetInterfacesNDIS( |
- std::vector<base::string16>* interface_service_names_out) { |
- HKEY network_cards_key = NULL; |
- if (RegOpenKeyEx( |
- HKEY_LOCAL_MACHINE, |
- L"Software\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards", 0, |
- KEY_READ, &network_cards_key) != ERROR_SUCCESS) { |
- return false; |
- } |
- DCHECK(network_cards_key); |
- |
- for (int i = 0;; ++i) { |
- TCHAR name[kStringLength]; |
- DWORD name_size = kStringLength; |
- FILETIME time; |
- if (RegEnumKeyEx(network_cards_key, i, name, &name_size, NULL, NULL, NULL, |
- &time) != ERROR_SUCCESS) { |
- break; |
- } |
- HKEY hardware_key = NULL; |
- if (RegOpenKeyEx(network_cards_key, name, 0, KEY_READ, &hardware_key) != |
- ERROR_SUCCESS) { |
- break; |
- } |
- DCHECK(hardware_key); |
- |
- TCHAR service_name[kStringLength]; |
- DWORD service_name_size = kStringLength; |
- DWORD type = 0; |
- if (RegQueryValueEx(hardware_key, L"ServiceName", NULL, &type, |
- reinterpret_cast<LPBYTE>(service_name), |
- &service_name_size) == ERROR_SUCCESS) { |
- interface_service_names_out->push_back(service_name); |
- } |
- RegCloseKey(hardware_key); |
- } |
- |
- RegCloseKey(network_cards_key); |
- return true; |
-} |
- |
-bool WindowsNdisApi::GetInterfaceDataNDIS(HANDLE adapter_handle, |
- WifiData::AccessPointDataSet* data) { |
- DCHECK(data); |
- |
- std::unique_ptr<BYTE, base::FreeDeleter> buffer( |
- static_cast<BYTE*>(malloc(oid_buffer_size_))); |
- if (!buffer) |
- return false; |
- |
- DWORD bytes_out; |
- int result; |
- |
- while (true) { |
- bytes_out = 0; |
- result = PerformQuery(adapter_handle, buffer.get(), oid_buffer_size_, |
- &bytes_out); |
- if (result == ERROR_GEN_FAILURE || // Returned by some Intel cards. |
- result == ERROR_INSUFFICIENT_BUFFER || result == ERROR_MORE_DATA || |
- result == NDIS_STATUS_INVALID_LENGTH || |
- result == NDIS_STATUS_BUFFER_TOO_SHORT) { |
- // The buffer we supplied is too small, so increase it. bytes_out should |
- // provide the required buffer size, but this is not always the case. |
- if (bytes_out > static_cast<DWORD>(oid_buffer_size_)) |
- oid_buffer_size_ = bytes_out; |
- else |
- oid_buffer_size_ *= 2; |
- |
- if (!ResizeBuffer(oid_buffer_size_, &buffer)) { |
- oid_buffer_size_ = kInitialBufferSize; // Reset for next time. |
- return false; |
- } |
- } else { |
- // The buffer is not too small. |
- break; |
- } |
- } |
- DCHECK(buffer.get()); |
- |
- if (result == ERROR_SUCCESS) { |
- NDIS_802_11_BSSID_LIST* bssid_list = |
- reinterpret_cast<NDIS_802_11_BSSID_LIST*>(buffer.get()); |
- GetDataFromBssIdList(*bssid_list, oid_buffer_size_, data); |
- } |
- |
return true; |
} |
-bool GetNetworkData(const WLAN_BSS_ENTRY& bss_entry, |
- AccessPointData* access_point_data) { |
- // Currently we get only MAC address, signal strength and SSID. |
- DCHECK(access_point_data); |
- access_point_data->mac_address = MacAddressAsString16(bss_entry.dot11Bssid); |
- access_point_data->radio_signal_strength = bss_entry.lRssi; |
- // bss_entry.dot11Ssid.ucSSID is not null-terminated. |
- base::UTF8ToUTF16(reinterpret_cast<const char*>(bss_entry.dot11Ssid.ucSSID), |
- static_cast<ULONG>(bss_entry.dot11Ssid.uSSIDLength), |
- &access_point_data->ssid); |
- // TODO(steveblock): Is it possible to get the following? |
- // access_point_data->signal_to_noise |
- // access_point_data->age |
- // access_point_data->channel |
- return true; |
-} |
- |
-bool UndefineDosDevice(const base::string16& device_name) { |
- // We remove only the mapping we use, that is \Device\<device_name>. |
- base::string16 target_path = L"\\Device\\" + device_name; |
- return DefineDosDevice(DDD_RAW_TARGET_PATH | DDD_REMOVE_DEFINITION | |
- DDD_EXACT_MATCH_ON_REMOVE, |
- device_name.c_str(), target_path.c_str()) == TRUE; |
-} |
- |
-bool DefineDosDeviceIfNotExists(const base::string16& device_name) { |
- // We create a DOS device name for the device at \Device\<device_name>. |
- base::string16 target_path = L"\\Device\\" + device_name; |
- |
- TCHAR target[kStringLength]; |
- if (QueryDosDevice(device_name.c_str(), target, kStringLength) > 0 && |
- target_path.compare(target) == 0) { |
- // Device already exists. |
- return true; |
- } |
- |
- if (GetLastError() != ERROR_FILE_NOT_FOUND) |
- return false; |
- |
- if (!DefineDosDevice(DDD_RAW_TARGET_PATH, device_name.c_str(), |
- target_path.c_str())) { |
- return false; |
- } |
- |
- // Check that the device is really there. |
- return QueryDosDevice(device_name.c_str(), target, kStringLength) > 0 && |
- target_path.compare(target) == 0; |
-} |
+} // anonymous namespace |
-HANDLE GetFileHandle(const base::string16& device_name) { |
- // We access a device with DOS path \Device\<device_name> at |
- // \\.\<device_name>. |
- base::string16 formatted_device_name = L"\\\\.\\" + device_name; |
- |
- return CreateFile(formatted_device_name.c_str(), GENERIC_READ, |
- FILE_SHARE_READ | FILE_SHARE_WRITE, // share mode |
- 0, // security attributes |
- OPEN_EXISTING, |
- 0, // flags and attributes |
- INVALID_HANDLE_VALUE); |
+WifiDataProvider* WifiDataProviderManager::DefaultFactoryFunction() { |
+ return new WifiDataProviderWin(); |
} |
-int PerformQuery(HANDLE adapter_handle, |
- BYTE* buffer, |
- DWORD buffer_size, |
- DWORD* bytes_out) { |
- DWORD oid = OID_802_11_BSSID_LIST; |
- if (!DeviceIoControl(adapter_handle, IOCTL_NDIS_QUERY_GLOBAL_STATS, &oid, |
- sizeof(oid), buffer, buffer_size, bytes_out, NULL)) { |
- return GetLastError(); |
- } |
- return ERROR_SUCCESS; |
-} |
+WifiDataProviderWin::WifiDataProviderWin() = default; |
-bool ResizeBuffer(int requested_size, |
- std::unique_ptr<BYTE, base::FreeDeleter>* buffer) { |
- DCHECK_GT(requested_size, 0); |
- DCHECK(buffer); |
- if (requested_size > kMaximumBufferSize) { |
- buffer->reset(); |
- return false; |
- } |
+WifiDataProviderWin::~WifiDataProviderWin() = default; |
- buffer->reset( |
- reinterpret_cast<BYTE*>(realloc(buffer->release(), requested_size))); |
- return buffer != NULL; |
+std::unique_ptr<WifiDataProviderCommon::WlanApiInterface> |
+WifiDataProviderWin::CreateWlanApi() { |
+ return WindowsWlanApi::Create(); |
} |
-bool GetSystemDirectory(base::string16* path) { |
- DCHECK(path); |
- // Return value includes terminating NULL. |
- int buffer_size = ::GetSystemDirectory(NULL, 0); |
- if (buffer_size == 0) |
- return false; |
- std::unique_ptr<base::char16[]> buffer(new base::char16[buffer_size]); |
- |
- // Return value excludes terminating NULL. |
- int characters_written = ::GetSystemDirectory(buffer.get(), buffer_size); |
- if (characters_written == 0) |
- return false; |
- DCHECK_EQ(buffer_size - 1, characters_written); |
- |
- path->assign(buffer.get(), characters_written); |
- |
- if (*path->rbegin() != L'\\') |
- path->append(L"\\"); |
- DCHECK_EQ(L'\\', *path->rbegin()); |
- return true; |
+std::unique_ptr<WifiPollingPolicy> WifiDataProviderWin::CreatePollingPolicy() { |
+ return base::MakeUnique<GenericWifiPollingPolicy< |
+ kDefaultPollingIntervalMs, kNoChangePollingIntervalMs, |
+ kTwoNoChangePollingIntervalMs, kNoWifiPollingIntervalMs>>(); |
} |
-} // namespace |
} // namespace device |