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 9 #include "base/strings/utf_string_conversions.h" 10 #include "content/browser/geolocation/wifi_data_provider_common.h" 11 12 namespace content { 13 14 bool ConvertToAccessPointData(const NDIS_WLAN_BSSID& data, 15 AccessPointData *access_point_data) { 16 // Currently we get only MAC address, signal strength and SSID. 17 // TODO(steveblock): Work out how to get age, channel and signal-to-noise. 18 DCHECK(access_point_data); 19 access_point_data->mac_address = MacAddressAsString16(data.MacAddress); 20 access_point_data->radio_signal_strength = data.Rssi; 21 // Note that _NDIS_802_11_SSID::Ssid::Ssid is not null-terminated. 22 base::UTF8ToUTF16(reinterpret_cast<const char*>(data.Ssid.Ssid), 23 data.Ssid.SsidLength, 24 &access_point_data->ssid); 25 return true; 26 } 27 28 int GetDataFromBssIdList(const NDIS_802_11_BSSID_LIST& bss_id_list, 29 int list_size, 30 WifiData::AccessPointDataSet* data) { 31 // Walk through the BSS IDs. 32 int found = 0; 33 const uint8 *iterator = reinterpret_cast<const uint8*>(&bss_id_list.Bssid[0]); 34 const uint8 *end_of_buffer = 35 reinterpret_cast<const uint8*>(&bss_id_list) + list_size; 36 for (int i = 0; i < static_cast<int>(bss_id_list.NumberOfItems); ++i) { 37 const NDIS_WLAN_BSSID *bss_id = 38 reinterpret_cast<const NDIS_WLAN_BSSID*>(iterator); 39 // Check that the length of this BSS ID is reasonable. 40 if (bss_id->Length < sizeof(NDIS_WLAN_BSSID) || 41 iterator + bss_id->Length > end_of_buffer) { 42 break; 43 } 44 AccessPointData access_point_data; 45 if (ConvertToAccessPointData(*bss_id, &access_point_data)) { 46 data->insert(access_point_data); 47 ++found; 48 } 49 // Move to the next BSS ID. 50 iterator += bss_id->Length; 51 } 52 return found; 53 } 54 55 } // namespace content 56
