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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #include "content/browser/geolocation/wifi_data_provider_common_win.h" | |
6 | |
7 #include <assert.h> | |
8 #include <stdint.h> | |
9 | |
10 #include "base/strings/utf_string_conversions.h" | |
11 #include "content/browser/geolocation/wifi_data_provider_common.h" | |
12 | |
13 namespace content { | |
14 | |
15 bool ConvertToAccessPointData(const NDIS_WLAN_BSSID& data, | |
16 AccessPointData *access_point_data) { | |
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. | |
19 DCHECK(access_point_data); | |
20 access_point_data->mac_address = MacAddressAsString16(data.MacAddress); | |
21 access_point_data->radio_signal_strength = data.Rssi; | |
22 // Note that _NDIS_802_11_SSID::Ssid::Ssid is not null-terminated. | |
23 base::UTF8ToUTF16(reinterpret_cast<const char*>(data.Ssid.Ssid), | |
24 data.Ssid.SsidLength, | |
25 &access_point_data->ssid); | |
26 return true; | |
27 } | |
28 | |
29 int GetDataFromBssIdList(const NDIS_802_11_BSSID_LIST& bss_id_list, | |
30 int list_size, | |
31 WifiData::AccessPointDataSet* data) { | |
32 // Walk through the BSS IDs. | |
33 int found = 0; | |
34 const uint8_t* iterator = | |
35 reinterpret_cast<const uint8_t*>(&bss_id_list.Bssid[0]); | |
36 const uint8_t* end_of_buffer = | |
37 reinterpret_cast<const uint8_t*>(&bss_id_list) + list_size; | |
38 for (int i = 0; i < static_cast<int>(bss_id_list.NumberOfItems); ++i) { | |
39 const NDIS_WLAN_BSSID *bss_id = | |
40 reinterpret_cast<const NDIS_WLAN_BSSID*>(iterator); | |
41 // Check that the length of this BSS ID is reasonable. | |
42 if (bss_id->Length < sizeof(NDIS_WLAN_BSSID) || | |
43 iterator + bss_id->Length > end_of_buffer) { | |
44 break; | |
45 } | |
46 AccessPointData access_point_data; | |
47 if (ConvertToAccessPointData(*bss_id, &access_point_data)) { | |
48 data->insert(access_point_data); | |
49 ++found; | |
50 } | |
51 // Move to the next BSS ID. | |
52 iterator += bss_id->Length; | |
53 } | |
54 return found; | |
55 } | |
56 | |
57 } // namespace content | |
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