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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 #include "device/geolocation/wifi_data_provider_common_win.h" | 5 #include "device/geolocation/wifi_data_provider_common_win.h" |
6 | 6 |
7 #include <assert.h> | 7 #include <assert.h> |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include "base/strings/utf_string_conversions.h" | 10 #include "base/strings/utf_string_conversions.h" |
11 #include "device/geolocation/wifi_data_provider_common.h" | 11 #include "device/geolocation/wifi_data_provider_common.h" |
12 | 12 |
13 namespace device { | 13 namespace device { |
14 | 14 |
15 bool ConvertToAccessPointData(const NDIS_WLAN_BSSID& data, | 15 bool ConvertToAccessPointData(const NDIS_WLAN_BSSID& data, |
16 AccessPointData *access_point_data) { | 16 AccessPointData* access_point_data) { |
17 // Currently we get only MAC address, signal strength and SSID. | 17 // Currently we get only MAC address, signal strength and SSID. |
18 // TODO(steveblock): Work out how to get age, channel and signal-to-noise. | 18 // TODO(steveblock): Work out how to get age, channel and signal-to-noise. |
19 DCHECK(access_point_data); | 19 DCHECK(access_point_data); |
20 access_point_data->mac_address = MacAddressAsString16(data.MacAddress); | 20 access_point_data->mac_address = MacAddressAsString16(data.MacAddress); |
21 access_point_data->radio_signal_strength = data.Rssi; | 21 access_point_data->radio_signal_strength = data.Rssi; |
22 // Note that _NDIS_802_11_SSID::Ssid::Ssid is not null-terminated. | 22 // Note that _NDIS_802_11_SSID::Ssid::Ssid is not null-terminated. |
23 base::UTF8ToUTF16(reinterpret_cast<const char*>(data.Ssid.Ssid), | 23 base::UTF8ToUTF16(reinterpret_cast<const char*>(data.Ssid.Ssid), |
24 data.Ssid.SsidLength, | 24 data.Ssid.SsidLength, &access_point_data->ssid); |
25 &access_point_data->ssid); | |
26 return true; | 25 return true; |
27 } | 26 } |
28 | 27 |
29 int GetDataFromBssIdList(const NDIS_802_11_BSSID_LIST& bss_id_list, | 28 int GetDataFromBssIdList(const NDIS_802_11_BSSID_LIST& bss_id_list, |
30 int list_size, | 29 int list_size, |
31 WifiData::AccessPointDataSet* data) { | 30 WifiData::AccessPointDataSet* data) { |
32 // Walk through the BSS IDs. | 31 // Walk through the BSS IDs. |
33 int found = 0; | 32 int found = 0; |
34 const uint8_t* iterator = | 33 const uint8_t* iterator = |
35 reinterpret_cast<const uint8_t*>(&bss_id_list.Bssid[0]); | 34 reinterpret_cast<const uint8_t*>(&bss_id_list.Bssid[0]); |
36 const uint8_t* end_of_buffer = | 35 const uint8_t* end_of_buffer = |
37 reinterpret_cast<const uint8_t*>(&bss_id_list) + list_size; | 36 reinterpret_cast<const uint8_t*>(&bss_id_list) + list_size; |
38 for (int i = 0; i < static_cast<int>(bss_id_list.NumberOfItems); ++i) { | 37 for (int i = 0; i < static_cast<int>(bss_id_list.NumberOfItems); ++i) { |
39 const NDIS_WLAN_BSSID *bss_id = | 38 const NDIS_WLAN_BSSID* bss_id = |
40 reinterpret_cast<const NDIS_WLAN_BSSID*>(iterator); | 39 reinterpret_cast<const NDIS_WLAN_BSSID*>(iterator); |
41 // Check that the length of this BSS ID is reasonable. | 40 // Check that the length of this BSS ID is reasonable. |
42 if (bss_id->Length < sizeof(NDIS_WLAN_BSSID) || | 41 if (bss_id->Length < sizeof(NDIS_WLAN_BSSID) || |
43 iterator + bss_id->Length > end_of_buffer) { | 42 iterator + bss_id->Length > end_of_buffer) { |
44 break; | 43 break; |
45 } | 44 } |
46 AccessPointData access_point_data; | 45 AccessPointData access_point_data; |
47 if (ConvertToAccessPointData(*bss_id, &access_point_data)) { | 46 if (ConvertToAccessPointData(*bss_id, &access_point_data)) { |
48 data->insert(access_point_data); | 47 data->insert(access_point_data); |
49 ++found; | 48 ++found; |
50 } | 49 } |
51 // Move to the next BSS ID. | 50 // Move to the next BSS ID. |
52 iterator += bss_id->Length; | 51 iterator += bss_id->Length; |
53 } | 52 } |
54 return found; | 53 return found; |
55 } | 54 } |
56 | 55 |
57 } // namespace device | 56 } // namespace device |
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