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      1 /*
      2  * Copyright (C) 2016 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.settings;
     18 
     19 import android.app.Activity;
     20 import android.content.Intent;
     21 import android.content.pm.PackageManager;
     22 import android.net.ConnectivityManager;
     23 import android.os.Bundle;
     24 import android.os.ResultReceiver;
     25 import android.os.UserHandle;
     26 import android.util.Log;
     27 
     28 /**
     29  * Activity which acts as a proxy to the tether provisioning app for sanity checks and permission
     30  * restrictions. Specifically, the provisioning apps require
     31  * {@link android.permission.CONNECTIVITY_INTERNAL}, while this activity can be started by a caller
     32  * with {@link android.permission.TETHER_PRIVILEGED}.
     33  */
     34 public class TetherProvisioningActivity extends Activity {
     35     private static final int PROVISION_REQUEST = 0;
     36     private static final String TAG = "TetherProvisioningAct";
     37     private static final String EXTRA_TETHER_TYPE = "TETHER_TYPE";
     38     private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
     39     private ResultReceiver mResultReceiver;
     40 
     41     @Override
     42     public void onCreate(Bundle savedInstanceState) {
     43         super.onCreate(savedInstanceState);
     44 
     45         mResultReceiver = (ResultReceiver)getIntent().getParcelableExtra(
     46                 ConnectivityManager.EXTRA_PROVISION_CALLBACK);
     47 
     48         int tetherType = getIntent().getIntExtra(ConnectivityManager.EXTRA_ADD_TETHER_TYPE,
     49                 ConnectivityManager.TETHERING_INVALID);
     50         String[] provisionApp = getResources().getStringArray(
     51                 com.android.internal.R.array.config_mobile_hotspot_provision_app);
     52 
     53         Intent intent = new Intent(Intent.ACTION_MAIN);
     54         intent.setClassName(provisionApp[0], provisionApp[1]);
     55         intent.putExtra(EXTRA_TETHER_TYPE, tetherType);
     56         if (DEBUG) {
     57             Log.d(TAG, "Starting provisioning app: " + provisionApp[0] + "." + provisionApp[1]);
     58         }
     59 
     60         if (getPackageManager().queryIntentActivities(intent,
     61                 PackageManager.MATCH_DEFAULT_ONLY).isEmpty()) {
     62             Log.e(TAG, "Provisioning app is configured, but not available.");
     63             mResultReceiver.send(ConnectivityManager.TETHER_ERROR_PROVISION_FAILED, null);
     64             finish();
     65             return;
     66         }
     67 
     68         startActivityForResultAsUser(intent, PROVISION_REQUEST, UserHandle.CURRENT);
     69     }
     70 
     71     @Override
     72     public void onActivityResult(int requestCode, int resultCode, Intent intent) {
     73         super.onActivityResult(requestCode, resultCode, intent);
     74         if (requestCode == PROVISION_REQUEST) {
     75             if (DEBUG) Log.d(TAG, "Got result from app: " + resultCode);
     76             int result = resultCode == Activity.RESULT_OK ?
     77                     ConnectivityManager.TETHER_ERROR_NO_ERROR :
     78                     ConnectivityManager.TETHER_ERROR_PROVISION_FAILED;
     79             mResultReceiver.send(result, null);
     80             finish();
     81         }
     82     }
     83 }
     84