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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Windows Vista uses the Native Wifi (WLAN) API for accessing WiFi cards. See | 5 // Windows Vista uses the Native Wifi (WLAN) API for accessing WiFi cards. See |
6 // http://msdn.microsoft.com/en-us/library/ms705945(VS.85).aspx. Windows XP | 6 // http://msdn.microsoft.com/en-us/library/ms705945(VS.85).aspx. Windows XP |
7 // Service Pack 3 (and Windows XP Service Pack 2, if upgraded with a hot fix) | 7 // Service Pack 3 (and Windows XP Service Pack 2, if upgraded with a hot fix) |
8 // also support a limited version of the WLAN API. See | 8 // also support a limited version of the WLAN API. See |
9 // http://msdn.microsoft.com/en-us/library/bb204766.aspx. The WLAN API uses | 9 // http://msdn.microsoft.com/en-us/library/bb204766.aspx. The WLAN API uses |
10 // wlanapi.h, which is not part of the SDK used by Gears, so is replicated | 10 // wlanapi.h, which is not part of the SDK used by Gears, so is replicated |
11 // locally using data from the MSDN. | 11 // locally using data from the MSDN. |
12 // | 12 // |
13 // Windows XP from Service Pack 2 onwards supports the Wireless Zero | 13 // Windows XP from Service Pack 2 onwards supports the Wireless Zero |
14 // Configuration (WZC) programming interface. See | 14 // Configuration (WZC) programming interface. See |
15 // http://msdn.microsoft.com/en-us/library/ms706587(VS.85).aspx. | 15 // http://msdn.microsoft.com/en-us/library/ms706587(VS.85).aspx. |
16 // | 16 // |
17 // The MSDN recommends that one use the WLAN API where available, and WZC | 17 // The MSDN recommends that one use the WLAN API where available, and WZC |
18 // otherwise. | 18 // otherwise. |
19 // | 19 // |
20 // However, it seems that WZC fails for some wireless cards. Also, WLAN seems | 20 // However, it seems that WZC fails for some wireless cards. Also, WLAN seems |
21 // not to work on XP SP3. So we use WLAN on Vista, and use NDIS directly | 21 // not to work on XP SP3. So we use WLAN on Vista, and use NDIS directly |
22 // otherwise. | 22 // otherwise. |
23 | 23 |
24 #include "device/geolocation/wifi_data_provider_win.h" | 24 #include "content/browser/geolocation/wifi_data_provider_win.h" |
25 | 25 |
26 #include <windows.h> | 26 #include <windows.h> |
27 #include <winioctl.h> | 27 #include <winioctl.h> |
28 #include <wlanapi.h> | 28 #include <wlanapi.h> |
29 | 29 |
30 #include "base/memory/free_deleter.h" | 30 #include "base/memory/free_deleter.h" |
31 #include "base/metrics/histogram.h" | 31 #include "base/metrics/histogram.h" |
32 #include "base/strings/utf_string_conversions.h" | 32 #include "base/strings/utf_string_conversions.h" |
33 #include "base/win/windows_version.h" | 33 #include "base/win/windows_version.h" |
34 #include "device/geolocation/wifi_data_provider_common.h" | 34 #include "content/browser/geolocation/wifi_data_provider_common.h" |
35 #include "device/geolocation/wifi_data_provider_common_win.h" | 35 #include "content/browser/geolocation/wifi_data_provider_common_win.h" |
36 #include "device/geolocation/wifi_data_provider_manager.h" | 36 #include "content/browser/geolocation/wifi_data_provider_manager.h" |
37 | 37 |
38 // Taken from ndis.h for WinCE. | 38 // Taken from ndis.h for WinCE. |
39 #define NDIS_STATUS_INVALID_LENGTH ((NDIS_STATUS)0xC0010014L) | 39 #define NDIS_STATUS_INVALID_LENGTH ((NDIS_STATUS)0xC0010014L) |
40 #define NDIS_STATUS_BUFFER_TOO_SHORT ((NDIS_STATUS)0xC0010016L) | 40 #define NDIS_STATUS_BUFFER_TOO_SHORT ((NDIS_STATUS)0xC0010016L) |
41 | 41 |
42 namespace device { | 42 namespace content { |
43 namespace { | 43 namespace { |
44 // The limits on the size of the buffer used for the OID query. | 44 // The limits on the size of the buffer used for the OID query. |
45 const int kInitialBufferSize = 2 << 12; // Good for about 50 APs. | 45 const int kInitialBufferSize = 2 << 12; // Good for about 50 APs. |
46 const int kMaximumBufferSize = 2 << 20; // 2MB | 46 const int kMaximumBufferSize = 2 << 20; // 2MB |
47 | 47 |
48 // Length for generic string buffers passed to Windows APIs. | 48 // Length for generic string buffers passed to Windows APIs. |
49 const int kStringLength = 512; | 49 const int kStringLength = 512; |
50 | 50 |
51 // The time periods, in milliseconds, between successive polls of the wifi data. | 51 // The time periods, in milliseconds, between successive polls of the wifi data. |
52 const int kDefaultPollingInterval = 10000; // 10s | 52 const int kDefaultPollingInterval = 10000; // 10s |
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633 path->assign(buffer.get(), characters_written); | 633 path->assign(buffer.get(), characters_written); |
634 | 634 |
635 if (*path->rbegin() != L'\\') { | 635 if (*path->rbegin() != L'\\') { |
636 path->append(L"\\"); | 636 path->append(L"\\"); |
637 } | 637 } |
638 DCHECK_EQ(L'\\', *path->rbegin()); | 638 DCHECK_EQ(L'\\', *path->rbegin()); |
639 return true; | 639 return true; |
640 } | 640 } |
641 } // namespace | 641 } // namespace |
642 | 642 |
643 } // namespace device | 643 } // namespace content |
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