1/* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16package com.android.settingslib; 17 18import android.app.ActivityManager; 19import android.content.ComponentName; 20import android.content.ContentResolver; 21import android.content.Context; 22import android.content.res.Resources; 23import android.net.ConnectivityManager; 24import android.net.wifi.WifiManager; 25import android.os.SystemProperties; 26import android.os.UserHandle; 27import android.provider.Settings; 28import android.telephony.CarrierConfigManager; 29 30public class TetherUtil { 31 32 // Types of tethering. 33 public static final int TETHERING_INVALID = -1; 34 public static final int TETHERING_WIFI = 0; 35 public static final int TETHERING_USB = 1; 36 public static final int TETHERING_BLUETOOTH = 2; 37 38 // Extras used for communicating with the TetherService. 39 public static final String EXTRA_ADD_TETHER_TYPE = "extraAddTetherType"; 40 public static final String EXTRA_REM_TETHER_TYPE = "extraRemTetherType"; 41 public static final String EXTRA_SET_ALARM = "extraSetAlarm"; 42 /** 43 * Tells the service to run a provision check now. 44 */ 45 public static final String EXTRA_RUN_PROVISION = "extraRunProvision"; 46 /** 47 * Enables wifi tethering if the provision check is successful. Used by 48 * QS to enable tethering. 49 */ 50 public static final String EXTRA_ENABLE_WIFI_TETHER = "extraEnableWifiTether"; 51 52 public static ComponentName TETHER_SERVICE = ComponentName.unflattenFromString(Resources 53 .getSystem().getString(com.android.internal.R.string.config_wifi_tether_enable)); 54 55 public static boolean setWifiTethering(boolean enable, Context context) { 56 final WifiManager wifiManager = 57 (WifiManager) context.getSystemService(Context.WIFI_SERVICE); 58 return wifiManager.setWifiApEnabled(null, enable); 59 } 60 61 public static boolean isWifiTetherEnabled(Context context) { 62 WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); 63 return wifiManager.getWifiApState() == WifiManager.WIFI_AP_STATE_ENABLED; 64 } 65 66 private static boolean isEntitlementCheckRequired(Context context) { 67 final CarrierConfigManager configManager = (CarrierConfigManager) context 68 .getSystemService(Context.CARRIER_CONFIG_SERVICE); 69 return configManager.getConfig().getBoolean(CarrierConfigManager 70 .KEY_REQUIRE_ENTITLEMENT_CHECKS_BOOL); 71 } 72 73 public static boolean isProvisioningNeeded(Context context) { 74 // Keep in sync with other usage of config_mobile_hotspot_provision_app. 75 // ConnectivityManager#enforceTetherChangePermission 76 String[] provisionApp = context.getResources().getStringArray( 77 com.android.internal.R.array.config_mobile_hotspot_provision_app); 78 if (SystemProperties.getBoolean("net.tethering.noprovisioning", false) 79 || provisionApp == null) { 80 return false; 81 } 82 // Check carrier config for entitlement checks 83 if (isEntitlementCheckRequired(context) == false) { 84 return false; 85 } 86 return (provisionApp.length == 2); 87 } 88 89 public static boolean isTetheringSupported(Context context) { 90 final ConnectivityManager cm = 91 (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); 92 final boolean isSecondaryUser = ActivityManager.getCurrentUser() != UserHandle.USER_OWNER; 93 return !isSecondaryUser && cm.isTetheringSupported(); 94 } 95 96} 97