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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 android.net.metrics;
     18 
     19 import android.annotation.SystemApi;
     20 import android.net.NetworkCapabilities;
     21 import android.os.Parcel;
     22 import android.os.Parcelable;
     23 
     24 /**
     25  * An event recorded by ConnectivityService when there is a change in the default network.
     26  * {@hide}
     27  */
     28 @SystemApi
     29 public final class DefaultNetworkEvent implements Parcelable {
     30     // The ID of the network that has become the new default or NETID_UNSET if none.
     31     public final int netId;
     32     // The list of transport types of the new default network, for example TRANSPORT_WIFI, as
     33     // defined in NetworkCapabilities.java.
     34     public final int[] transportTypes;
     35     // The ID of the network that was the default before or NETID_UNSET if none.
     36     public final int prevNetId;
     37     // Whether the previous network had IPv4/IPv6 connectivity.
     38     public final boolean prevIPv4;
     39     public final boolean prevIPv6;
     40 
     41     /** {@hide} */
     42     public DefaultNetworkEvent(int netId, int[] transportTypes,
     43                 int prevNetId, boolean prevIPv4, boolean prevIPv6) {
     44         this.netId = netId;
     45         this.transportTypes = transportTypes;
     46         this.prevNetId = prevNetId;
     47         this.prevIPv4 = prevIPv4;
     48         this.prevIPv6 = prevIPv6;
     49     }
     50 
     51     private DefaultNetworkEvent(Parcel in) {
     52         this.netId = in.readInt();
     53         this.transportTypes = in.createIntArray();
     54         this.prevNetId = in.readInt();
     55         this.prevIPv4 = (in.readByte() > 0);
     56         this.prevIPv6 = (in.readByte() > 0);
     57     }
     58 
     59     @Override
     60     public void writeToParcel(Parcel out, int flags) {
     61         out.writeInt(netId);
     62         out.writeIntArray(transportTypes);
     63         out.writeInt(prevNetId);
     64         out.writeByte(prevIPv4 ? (byte) 1 : (byte) 0);
     65         out.writeByte(prevIPv6 ? (byte) 1 : (byte) 0);
     66     }
     67 
     68     @Override
     69     public int describeContents() {
     70         return 0;
     71     }
     72 
     73     @Override
     74     public String toString() {
     75       String prevNetwork = String.valueOf(prevNetId);
     76       String newNetwork = String.valueOf(netId);
     77       if (prevNetId != 0) {
     78           prevNetwork += ":" + ipSupport();
     79       }
     80       if (netId != 0) {
     81           newNetwork += ":" + NetworkCapabilities.transportNamesOf(transportTypes);
     82       }
     83       return String.format("DefaultNetworkEvent(%s -> %s)", prevNetwork, newNetwork);
     84     }
     85 
     86     private String ipSupport() {
     87         if (prevIPv4 && prevIPv6) {
     88             return "DUAL";
     89         }
     90         if (prevIPv6) {
     91             return "IPv6";
     92         }
     93         if (prevIPv4) {
     94             return "IPv4";
     95         }
     96         return "NONE";
     97     }
     98 
     99     public static final Parcelable.Creator<DefaultNetworkEvent> CREATOR
    100         = new Parcelable.Creator<DefaultNetworkEvent>() {
    101         public DefaultNetworkEvent createFromParcel(Parcel in) {
    102             return new DefaultNetworkEvent(in);
    103         }
    104 
    105         public DefaultNetworkEvent[] newArray(int size) {
    106             return new DefaultNetworkEvent[size];
    107         }
    108     };
    109 
    110     public static void logEvent(
    111             int netId, int[] transports, int prevNetId, boolean hadIPv4, boolean hadIPv6) {
    112     }
    113 }
    114