content: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.net.metrics;
  
  import static android.net.ConnectivityManager.NETID_UNSET;
  
  import android.net.NetworkCapabilities;
  
  import com.android.internal.util.BitUtils;
  
  import java.util.StringJoiner;
  
  /**
   * An event recorded by ConnectivityService when there is a change in the default network.
   * {@hide}
   */
  public class DefaultNetworkEvent {
  
      // The creation time in milliseconds of this DefaultNetworkEvent.
      public final long creationTimeMs;
      // The network ID of the network or NETID_UNSET if none.
      public int netId = NETID_UNSET;
      // The list of transport types, as defined in NetworkCapabilities.java.
      public int transports;
      // The list of transport types of the last previous default network.
      public int previousTransports;
      // Whether the network has IPv4/IPv6 connectivity.
      public boolean ipv4;
      public boolean ipv6;
      // The initial network score when this network became the default network.
      public int initialScore;
      // The initial network score when this network stopped being the default network.
      public int finalScore;
      // The total duration in milliseconds this network was the default network.
      public long durationMs;
      // The total duration in milliseconds this network was the default network and was validated.
      public long validatedMs;
  
      public DefaultNetworkEvent(long timeMs) {
          creationTimeMs = timeMs;
      }
  
      /** Update the durationMs of this DefaultNetworkEvent for the given current time. */
      public void updateDuration(long timeMs) {
          durationMs = timeMs - creationTimeMs;
      }
  
      @Override
      public String toString() {
          StringJoiner j = new StringJoiner(", ", "DefaultNetworkEvent(", ")");
          j.add("netId=" + netId);
          for (int t : BitUtils.unpackBits(transports)) {
              j.add(NetworkCapabilities.transportNameOf(t));
          }
          j.add("ip=" + ipSupport());
          if (initialScore > 0) {
              j.add("initial_score=" + initialScore);
          }
          if (finalScore > 0) {
              j.add("final_score=" + finalScore);
          }
          j.add(String.format("duration=%.0fs", durationMs / 1000.0));
          j.add(String.format("validation=%04.1f%%", (validatedMs * 100.0) / durationMs));
          return j.toString();
      }
  
      private String ipSupport() {
          if (ipv4 && ipv6) {
              return "IPv4v6";
          }
          if (ipv6) {
              return "IPv6";
          }
          if (ipv4) {
              return "IPv4";
          }
          return "NONE";
      }
  }
  