| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.wifi.util; |
| |
| import android.net.wifi.ScanResult; |
| import android.net.wifi.WifiConfiguration; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.server.wifi.ScanDetail; |
| import com.android.server.wifi.hotspot2.NetworkDetail; |
| |
| /** |
| * Scan result utility for any {@link ScanResult} related operations. |
| * Currently contains: |
| * > Helper method for converting a ScanResult to a ScanDetail. |
| * Only fields that are supported in ScanResult are copied. |
| * > Helper methods to identify the encryption of a ScanResult. |
| */ |
| public class ScanResultUtil { |
| private ScanResultUtil() { /* not constructable */ } |
| |
| /** |
| * This method should only be used when the informationElements field in the provided scan |
| * result is filled in with the IEs from the beacon. |
| */ |
| public static ScanDetail toScanDetail(ScanResult scanResult) { |
| NetworkDetail networkDetail = new NetworkDetail(scanResult.BSSID, |
| scanResult.informationElements, scanResult.anqpLines, scanResult.frequency); |
| return new ScanDetail(scanResult, networkDetail); |
| } |
| |
| /** |
| * Helper method to check if the provided |scanResult| corresponds to a PSK network or not. |
| * This checks if the provided capabilities string contains PSK encryption type or not. |
| */ |
| public static boolean isScanResultForPskNetwork(ScanResult scanResult) { |
| return scanResult.capabilities.contains("PSK"); |
| } |
| |
| /** |
| * Helper method to check if the provided |scanResult| corresponds to a EAP network or not. |
| * This checks if the provided capabilities string contains EAP encryption type or not. |
| */ |
| public static boolean isScanResultForEapNetwork(ScanResult scanResult) { |
| return scanResult.capabilities.contains("EAP"); |
| } |
| |
| /** |
| * Helper method to check if the provided |scanResult| corresponds to a WEP network or not. |
| * This checks if the provided capabilities string contains WEP encryption type or not. |
| */ |
| public static boolean isScanResultForWepNetwork(ScanResult scanResult) { |
| return scanResult.capabilities.contains("WEP"); |
| } |
| |
| /** |
| * Helper method to check if the provided |scanResult| corresponds to an open network or not. |
| * This checks if the provided capabilities string does not contain either of WEP, PSK or EAP |
| * encryption types or not. |
| */ |
| public static boolean isScanResultForOpenNetwork(ScanResult scanResult) { |
| return !(isScanResultForWepNetwork(scanResult) || isScanResultForPskNetwork(scanResult) |
| || isScanResultForEapNetwork(scanResult)); |
| } |
| |
| /** |
| * Helper method to quote the SSID in Scan result to use for comparing/filling SSID stored in |
| * WifiConfiguration object. |
| */ |
| @VisibleForTesting |
| public static String createQuotedSSID(String ssid) { |
| return "\"" + ssid + "\""; |
| } |
| |
| /** |
| * Creates a network configuration object using the provided |scanResult|. |
| * This is used to create ephemeral network configurations. |
| */ |
| public static WifiConfiguration createNetworkFromScanResult(ScanResult scanResult) { |
| WifiConfiguration config = new WifiConfiguration(); |
| config.SSID = createQuotedSSID(scanResult.SSID); |
| setAllowedKeyManagementFromScanResult(scanResult, config); |
| return config; |
| } |
| |
| /** |
| * Sets the {@link WifiConfiguration#allowedKeyManagement} field on the given |
| * {@link WifiConfiguration} based on its corresponding {@link ScanResult}. |
| */ |
| public static void setAllowedKeyManagementFromScanResult(ScanResult scanResult, |
| WifiConfiguration config) { |
| if (isScanResultForPskNetwork(scanResult)) { |
| config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK); |
| } else if (isScanResultForEapNetwork(scanResult)) { |
| config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_EAP); |
| config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.IEEE8021X); |
| } else if (isScanResultForWepNetwork(scanResult)) { |
| config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); |
| config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN); |
| config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED); |
| } else { |
| config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); |
| } |
| } |
| } |