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.os.Parcel; 21 import android.os.Parcelable; 22 23 /** 24 * An event recorded by DnsEventListenerService. 25 * {@hide} 26 */ 27 @SystemApi 28 final public class DnsEvent implements Parcelable { 29 public final int netId; 30 31 // The event type is currently only 1 or 2, so we store it as a byte. 32 public final byte[] eventTypes; 33 // Current getaddrinfo codes go from 1 to EAI_MAX = 15. gethostbyname returns errno, but there 34 // are fewer than 255 errno values. So we store the result code in a byte as well. 35 public final byte[] returnCodes; 36 // The latency is an integer because a) short arrays aren't parcelable and b) a short can only 37 // store a maximum latency of 32757 or 65535 ms, which is too short for pathologically slow 38 // queries. 39 public final int[] latenciesMs; 40 41 /** {@hide} */ DnsEvent(int netId, byte[] eventTypes, byte[] returnCodes, int[] latenciesMs)42 public DnsEvent(int netId, byte[] eventTypes, byte[] returnCodes, int[] latenciesMs) { 43 this.netId = netId; 44 this.eventTypes = eventTypes; 45 this.returnCodes = returnCodes; 46 this.latenciesMs = latenciesMs; 47 } 48 DnsEvent(Parcel in)49 private DnsEvent(Parcel in) { 50 this.netId = in.readInt(); 51 this.eventTypes = in.createByteArray(); 52 this.returnCodes = in.createByteArray(); 53 this.latenciesMs = in.createIntArray(); 54 } 55 56 @Override writeToParcel(Parcel out, int flags)57 public void writeToParcel(Parcel out, int flags) { 58 out.writeInt(netId); 59 out.writeByteArray(eventTypes); 60 out.writeByteArray(returnCodes); 61 out.writeIntArray(latenciesMs); 62 } 63 64 @Override describeContents()65 public int describeContents() { 66 return 0; 67 } 68 69 @Override toString()70 public String toString() { 71 return String.format("DnsEvent(%d, %d events)", netId, eventTypes.length); 72 } 73 74 public static final Parcelable.Creator<DnsEvent> CREATOR = new Parcelable.Creator<DnsEvent>() { 75 @Override 76 public DnsEvent createFromParcel(Parcel in) { 77 return new DnsEvent(in); 78 } 79 80 @Override 81 public DnsEvent[] newArray(int size) { 82 return new DnsEvent[size]; 83 } 84 }; 85 logEvent( int netId, byte[] eventTypes, byte[] returnCodes, int[] latenciesMs)86 public static void logEvent( 87 int netId, byte[] eventTypes, byte[] returnCodes, int[] latenciesMs) { 88 } 89 } 90