1 /* 2 * Copyright (C) 2020 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.server.wifi; 18 19 import android.annotation.SystemApi; 20 import android.os.SystemService; 21 import android.util.Log; 22 23 import java.util.NoSuchElementException; 24 25 /** 26 * Wrapper to start/stop supplicant daemon using init system. 27 * @hide 28 */ 29 @SystemApi(client = SystemApi.Client.SYSTEM_SERVER) 30 public class SupplicantManager { 31 private static final String TAG = "SupplicantManager"; 32 33 private static final String WPA_SUPPLICANT_DAEMON_NAME = "wpa_supplicant"; 34 SupplicantManager()35 private SupplicantManager() {} 36 37 /** 38 * Start the wpa_supplicant daemon. 39 * Note: This uses the init system to start the "wpa_supplicant" service. 40 * 41 * @throws NoSuchElementException if supplicant daemon failed to start 42 */ start()43 public static void start() { 44 try { 45 SystemService.start(WPA_SUPPLICANT_DAEMON_NAME); 46 } catch (RuntimeException e) { 47 // likely a "failed to set system property" runtime exception 48 throw new NoSuchElementException("Failed to start Supplicant"); 49 } 50 } 51 52 /** 53 * Stop the wpa_supplicant daemon. 54 * Note: This uses the init system to stop the "wpa_supplicant" service. 55 */ stop()56 public static void stop() { 57 try { 58 SystemService.stop(WPA_SUPPLICANT_DAEMON_NAME); 59 } catch (RuntimeException e) { 60 // likely a "failed to set system property" runtime exception 61 Log.w(TAG, "Failed to stop Supplicant", e); 62 } 63 } 64 } 65