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/*
* 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 android.annotation.SystemApi;
import android.annotation.TestApi;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.SparseArray;
import com.android.internal.util.MessageUtils;
/**
* An event recorded when IpReachabilityMonitor sends a neighbor probe or receives
* a neighbor probe result.
* {@hide}
*/
@SystemApi
@TestApi
public final class IpReachabilityEvent implements IpConnectivityLog.Event {
// Event types.
/** A probe forced by IpReachabilityMonitor. */
public static final int PROBE = 1 << 8;
/** Neighbor unreachable after a forced probe. */
public static final int NUD_FAILED = 2 << 8;
/** Neighbor unreachable after a forced probe, IP provisioning is also lost. */
public static final int PROVISIONING_LOST = 3 << 8;
/** Neighbor unreachable notification from kernel. */
public static final int NUD_FAILED_ORGANIC = 4 << 8;
/** Neighbor unreachable notification from kernel, IP provisioning is also lost. */
public static final int PROVISIONING_LOST_ORGANIC = 5 << 8;
// eventType byte format (MSB to LSB):
// byte 0: unused
// byte 1: unused
// byte 2: type of event: PROBE, NUD_FAILED, PROVISIONING_LOST
// byte 3: when byte 2 == PROBE, errno code from RTNetlink or IpReachabilityMonitor.
/** @hide */
public final int eventType;
public IpReachabilityEvent(int eventType) {
this.eventType = eventType;
}
private IpReachabilityEvent(Parcel in) {
this.eventType = in.readInt();
}
/** @hide */
@Override
public void writeToParcel(Parcel out, int flags) {
out.writeInt(eventType);
}
/** @hide */
@Override
public int describeContents() {
return 0;
}
/** @hide */
public static final @android.annotation.NonNull Parcelable.Creator<IpReachabilityEvent> CREATOR
= new Parcelable.Creator<IpReachabilityEvent>() {
public IpReachabilityEvent createFromParcel(Parcel in) {
return new IpReachabilityEvent(in);
}
public IpReachabilityEvent[] newArray(int size) {
return new IpReachabilityEvent[size];
}
};
@Override
public String toString() {
int hi = eventType & 0xff00;
int lo = eventType & 0x00ff;
String eventName = Decoder.constants.get(hi);
return String.format("IpReachabilityEvent(%s:%02x)", eventName, lo);
}
@Override
public boolean equals(Object obj) {
if (obj == null || !(obj.getClass().equals(IpReachabilityEvent.class))) return false;
final IpReachabilityEvent other = (IpReachabilityEvent) obj;
return eventType == other.eventType;
}
final static class Decoder {
static final SparseArray<String> constants =
MessageUtils.findMessageNames(new Class[]{IpReachabilityEvent.class},
new String[]{"PROBE", "PROVISIONING_", "NUD_"});
}
}
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