1 /*
2  * Copyright (C) 2021 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  */
16 
17 package com.android.settingslib.wifi;
18 
19 import android.content.Context;
20 import android.os.Build;
21 import android.os.UserManager;
22 import android.util.Log;
23 
24 import androidx.annotation.ChecksSdkIntAtLeast;
25 
26 import com.android.internal.annotations.VisibleForTesting;
27 
28 /* Utility class is to confirm the Wi-Fi function is available by enterprise restriction */
29 public class WifiEnterpriseRestrictionUtils {
30     private static final String TAG = "WifiEntResUtils";
31 
32     /**
33      * Confirm Wi-Fi tethering is allowed according to whether user restriction is set
34      *
35      * @param context A context
36      * @return whether the device is permitted to use Wi-Fi Tethering
37      */
isWifiTetheringAllowed(Context context)38     public static boolean isWifiTetheringAllowed(Context context) {
39         if (!hasUserRestrictionFromT(context, UserManager.DISALLOW_WIFI_TETHERING)) return true;
40         Log.w(TAG, "Wi-Fi Tethering isn't available due to user restriction.");
41         return false;
42     }
43 
44     /**
45      * Confirm Wi-Fi Direct is allowed according to whether user restriction is set
46      *
47      * @param context A context
48      * @return whether the device is permitted to use Wi-Fi Direct
49      */
isWifiDirectAllowed(Context context)50     public static boolean isWifiDirectAllowed(Context context) {
51         if (!hasUserRestrictionFromT(context, UserManager.DISALLOW_WIFI_DIRECT)) return true;
52         Log.w(TAG, "Wi-Fi Direct isn't available due to user restriction.");
53         return false;
54     }
55 
56     /**
57      * Confirm Wi-Fi Config is allowed to add according to whether user restriction is set
58      *
59      * @param context A context
60      * @return whether the device is permitted to add new Wi-Fi config
61      */
isAddWifiConfigAllowed(Context context)62     public static boolean isAddWifiConfigAllowed(Context context) {
63         if (!hasUserRestrictionFromT(context, UserManager.DISALLOW_ADD_WIFI_CONFIG)) return true;
64         Log.w(TAG, "Wi-Fi Add network isn't available due to user restriction.");
65         return false;
66     }
67 
68     /**
69      * Confirm Wi-Fi state is allowed to change to whether user restriction is set
70      *
71      * @param context A context
72      * @return whether the device is permitted to change Wi-Fi state
73      */
isChangeWifiStateAllowed(Context context)74     public static boolean isChangeWifiStateAllowed(Context context) {
75         if (!hasUserRestrictionFromT(context, UserManager.DISALLOW_CHANGE_WIFI_STATE)) return true;
76         Log.w(TAG, "WI-FI state isn't allowed to change due to user restriction.");
77         return false;
78     }
79 
80     @VisibleForTesting
hasUserRestrictionFromT(Context context, String restrictionKey)81     static boolean hasUserRestrictionFromT(Context context, String restrictionKey) {
82         if (!isAtLeastT()) return false;
83         final UserManager userManager = context.getSystemService(UserManager.class);
84         if (userManager == null) return false;
85         return userManager.hasUserRestriction(restrictionKey);
86     }
87 
88     @ChecksSdkIntAtLeast(api = Build.VERSION_CODES.TIRAMISU)
isAtLeastT()89     private static boolean isAtLeastT() {
90         return Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU;
91     }
92 }
93