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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.server.connectivity.tethering;
     18 
     19 import android.net.LinkProperties;
     20 
     21 /**
     22  * @hide
     23  *
     24  * Interface with methods necessary to notify that a given interface is ready for tethering.
     25  *
     26  * Rename to something more representative, e.g. IpServingControlCallback.
     27  *
     28  * All methods MUST be called on the TetherMasterSM main Looper's thread.
     29  */
     30 public class IControlsTethering {
     31     public static final int STATE_UNAVAILABLE = 0;
     32     public static final int STATE_AVAILABLE   = 1;
     33     public static final int STATE_TETHERED    = 2;
     34     public static final int STATE_LOCAL_ONLY  = 3;
     35 
     36     public static String getStateString(int state) {
     37         switch (state) {
     38             case STATE_UNAVAILABLE: return "UNAVAILABLE";
     39             case STATE_AVAILABLE:   return "AVAILABLE";
     40             case STATE_TETHERED:    return "TETHERED";
     41             case STATE_LOCAL_ONLY:  return "LOCAL_ONLY";
     42         }
     43         return "UNKNOWN: " + state;
     44     }
     45 
     46     /**
     47      * Notify that |who| has changed its tethering state.
     48      *
     49      * TODO: Remove the need for the |who| argument.
     50      *
     51      * @param who corresponding instance of a TetherInterfaceStateMachine
     52      * @param state one of IControlsTethering.STATE_*
     53      * @param lastError one of ConnectivityManager.TETHER_ERROR_*
     54      */
     55     public void updateInterfaceState(TetherInterfaceStateMachine who, int state, int lastError) {}
     56 
     57     /**
     58      * Notify that |who| has new LinkProperties.
     59      *
     60      * TODO: Remove the need for the |who| argument.
     61      *
     62      * @param who corresponding instance of a TetherInterfaceStateMachine
     63      * @param newLp the new LinkProperties to report
     64      */
     65     public void updateLinkProperties(TetherInterfaceStateMachine who, LinkProperties newLp) {}
     66 }
     67