/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.connectivity;
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import static android.net.NetworkCapabilities.MAX_TRANSPORT;
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import static android.net.NetworkCapabilities.TRANSPORT_BLUETOOTH;
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import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
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import static android.net.NetworkCapabilities.TRANSPORT_ETHERNET;
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import static android.net.NetworkCapabilities.TRANSPORT_LOWPAN;
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import static android.net.NetworkCapabilities.TRANSPORT_VPN;
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import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
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import static android.net.NetworkCapabilities.TRANSPORT_WIFI_AWARE;
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import android.net.ConnectivityManager;
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import android.net.ConnectivityMetricsEvent;
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import android.net.metrics.ApfProgramEvent;
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import android.net.metrics.ApfStats;
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import android.net.metrics.DefaultNetworkEvent;
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import android.net.metrics.DhcpClientEvent;
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import android.net.metrics.DhcpErrorEvent;
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import android.net.metrics.DnsEvent;
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import android.net.metrics.ConnectStats;
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import android.net.metrics.IpManagerEvent;
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import android.net.metrics.IpReachabilityEvent;
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import android.net.metrics.NetworkEvent;
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import android.net.metrics.RaEvent;
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import android.net.metrics.ValidationProbeEvent;
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import android.net.metrics.WakeupStats;
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import android.os.Parcelable;
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import android.util.SparseArray;
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import android.util.SparseIntArray;
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import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass;
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import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.IpConnectivityEvent;
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import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.IpConnectivityLog;
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import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.Pair;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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/** {@hide} */
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final public class IpConnectivityEventBuilder {
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private IpConnectivityEventBuilder() {
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}
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public static byte[] serialize(int dropped, List<IpConnectivityEvent> events)
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throws IOException {
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final IpConnectivityLog log = new IpConnectivityLog();
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log.events = events.toArray(new IpConnectivityEvent[events.size()]);
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log.droppedEvents = dropped;
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if ((log.events.length > 0) || (dropped > 0)) {
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// Only write version number if log has some information at all.
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log.version = IpConnectivityMetrics.VERSION;
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}
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return IpConnectivityLog.toByteArray(log);
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}
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public static List<IpConnectivityEvent> toProto(List<ConnectivityMetricsEvent> eventsIn) {
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final ArrayList<IpConnectivityEvent> eventsOut = new ArrayList<>(eventsIn.size());
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for (ConnectivityMetricsEvent in : eventsIn) {
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final IpConnectivityEvent out = toProto(in);
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if (out == null) {
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continue;
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}
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eventsOut.add(out);
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}
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return eventsOut;
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}
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public static IpConnectivityEvent toProto(ConnectivityMetricsEvent ev) {
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final IpConnectivityEvent out = buildEvent(ev.netId, ev.transports, ev.ifname);
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out.timeMs = ev.timestamp;
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if (!setEvent(out, ev.data)) {
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return null;
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}
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return out;
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}
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public static IpConnectivityEvent toProto(ConnectStats in) {
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IpConnectivityLogClass.ConnectStatistics stats =
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new IpConnectivityLogClass.ConnectStatistics();
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stats.connectCount = in.connectCount;
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stats.connectBlockingCount = in.connectBlockingCount;
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stats.ipv6AddrCount = in.ipv6ConnectCount;
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stats.latenciesMs = in.latencies.toArray();
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stats.errnosCounters = toPairArray(in.errnos);
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final IpConnectivityEvent out = buildEvent(in.netId, in.transports, null);
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out.setConnectStatistics(stats);
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return out;
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}
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public static IpConnectivityEvent toProto(DnsEvent in) {
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IpConnectivityLogClass.DNSLookupBatch dnsLookupBatch =
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new IpConnectivityLogClass.DNSLookupBatch();
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in.resize(in.eventCount);
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dnsLookupBatch.eventTypes = bytesToInts(in.eventTypes);
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dnsLookupBatch.returnCodes = bytesToInts(in.returnCodes);
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dnsLookupBatch.latenciesMs = in.latenciesMs;
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final IpConnectivityEvent out = buildEvent(in.netId, in.transports, null);
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out.setDnsLookupBatch(dnsLookupBatch);
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return out;
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}
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public static IpConnectivityEvent toProto(WakeupStats in) {
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IpConnectivityLogClass.WakeupStats wakeupStats =
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new IpConnectivityLogClass.WakeupStats();
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in.updateDuration();
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wakeupStats.durationSec = in.durationSec;
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wakeupStats.totalWakeups = in.totalWakeups;
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wakeupStats.rootWakeups = in.rootWakeups;
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wakeupStats.systemWakeups = in.systemWakeups;
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wakeupStats.nonApplicationWakeups = in.nonApplicationWakeups;
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wakeupStats.applicationWakeups = in.applicationWakeups;
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wakeupStats.noUidWakeups = in.noUidWakeups;
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wakeupStats.l2UnicastCount = in.l2UnicastCount;
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wakeupStats.l2MulticastCount = in.l2MulticastCount;
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wakeupStats.l2BroadcastCount = in.l2BroadcastCount;
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wakeupStats.ethertypeCounts = toPairArray(in.ethertypes);
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wakeupStats.ipNextHeaderCounts = toPairArray(in.ipNextHeaders);
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final IpConnectivityEvent out = buildEvent(0, 0, in.iface);
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out.setWakeupStats(wakeupStats);
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return out;
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}
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public static IpConnectivityEvent toProto(DefaultNetworkEvent in) {
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IpConnectivityLogClass.DefaultNetworkEvent ev =
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new IpConnectivityLogClass.DefaultNetworkEvent();
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ev.finalScore = in.finalScore;
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ev.initialScore = in.initialScore;
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ev.ipSupport = ipSupportOf(in);
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ev.defaultNetworkDurationMs = in.durationMs;
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ev.validationDurationMs = in.validatedMs;
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ev.previousDefaultNetworkLinkLayer = transportsToLinkLayer(in.previousTransports);
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final IpConnectivityEvent out = buildEvent(in.netId, in.transports, null);
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if (in.transports == 0) {
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// Set link layer to NONE for events representing the absence of a default network.
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out.linkLayer = IpConnectivityLogClass.NONE;
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}
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out.setDefaultNetworkEvent(ev);
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return out;
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}
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private static IpConnectivityEvent buildEvent(int netId, long transports, String ifname) {
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final IpConnectivityEvent ev = new IpConnectivityEvent();
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ev.networkId = netId;
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ev.transports = transports;
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if (ifname != null) {
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ev.ifName = ifname;
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}
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inferLinkLayer(ev);
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return ev;
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}
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private static boolean setEvent(IpConnectivityEvent out, Parcelable in) {
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if (in instanceof DhcpErrorEvent) {
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setDhcpErrorEvent(out, (DhcpErrorEvent) in);
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return true;
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}
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if (in instanceof DhcpClientEvent) {
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setDhcpClientEvent(out, (DhcpClientEvent) in);
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return true;
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}
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if (in instanceof IpManagerEvent) {
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setIpManagerEvent(out, (IpManagerEvent) in);
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return true;
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}
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if (in instanceof IpReachabilityEvent) {
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setIpReachabilityEvent(out, (IpReachabilityEvent) in);
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return true;
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}
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if (in instanceof NetworkEvent) {
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setNetworkEvent(out, (NetworkEvent) in);
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return true;
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}
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if (in instanceof ValidationProbeEvent) {
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setValidationProbeEvent(out, (ValidationProbeEvent) in);
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return true;
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}
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if (in instanceof ApfProgramEvent) {
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setApfProgramEvent(out, (ApfProgramEvent) in);
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return true;
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}
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if (in instanceof ApfStats) {
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setApfStats(out, (ApfStats) in);
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return true;
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}
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if (in instanceof RaEvent) {
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setRaEvent(out, (RaEvent) in);
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return true;
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}
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return false;
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}
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private static void setDhcpErrorEvent(IpConnectivityEvent out, DhcpErrorEvent in) {
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IpConnectivityLogClass.DHCPEvent dhcpEvent = new IpConnectivityLogClass.DHCPEvent();
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dhcpEvent.setErrorCode(in.errorCode);
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out.setDhcpEvent(dhcpEvent);
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}
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private static void setDhcpClientEvent(IpConnectivityEvent out, DhcpClientEvent in) {
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IpConnectivityLogClass.DHCPEvent dhcpEvent = new IpConnectivityLogClass.DHCPEvent();
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dhcpEvent.setStateTransition(in.msg);
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dhcpEvent.durationMs = in.durationMs;
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out.setDhcpEvent(dhcpEvent);
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}
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private static void setIpManagerEvent(IpConnectivityEvent out, IpManagerEvent in) {
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IpConnectivityLogClass.IpProvisioningEvent ipProvisioningEvent =
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new IpConnectivityLogClass.IpProvisioningEvent();
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ipProvisioningEvent.eventType = in.eventType;
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ipProvisioningEvent.latencyMs = (int) in.durationMs;
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out.setIpProvisioningEvent(ipProvisioningEvent);
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}
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private static void setIpReachabilityEvent(IpConnectivityEvent out, IpReachabilityEvent in) {
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IpConnectivityLogClass.IpReachabilityEvent ipReachabilityEvent =
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new IpConnectivityLogClass.IpReachabilityEvent();
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ipReachabilityEvent.eventType = in.eventType;
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out.setIpReachabilityEvent(ipReachabilityEvent);
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}
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private static void setNetworkEvent(IpConnectivityEvent out, NetworkEvent in) {
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IpConnectivityLogClass.NetworkEvent networkEvent =
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new IpConnectivityLogClass.NetworkEvent();
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networkEvent.eventType = in.eventType;
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networkEvent.latencyMs = (int) in.durationMs;
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out.setNetworkEvent(networkEvent);
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}
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private static void setValidationProbeEvent(IpConnectivityEvent out, ValidationProbeEvent in) {
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IpConnectivityLogClass.ValidationProbeEvent validationProbeEvent =
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new IpConnectivityLogClass.ValidationProbeEvent();
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validationProbeEvent.latencyMs = (int) in.durationMs;
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validationProbeEvent.probeType = in.probeType;
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validationProbeEvent.probeResult = in.returnCode;
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out.setValidationProbeEvent(validationProbeEvent);
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}
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private static void setApfProgramEvent(IpConnectivityEvent out, ApfProgramEvent in) {
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IpConnectivityLogClass.ApfProgramEvent apfProgramEvent =
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new IpConnectivityLogClass.ApfProgramEvent();
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apfProgramEvent.lifetime = in.lifetime;
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apfProgramEvent.effectiveLifetime = in.actualLifetime;
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apfProgramEvent.filteredRas = in.filteredRas;
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apfProgramEvent.currentRas = in.currentRas;
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apfProgramEvent.programLength = in.programLength;
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if (isBitSet(in.flags, ApfProgramEvent.FLAG_MULTICAST_FILTER_ON)) {
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apfProgramEvent.dropMulticast = true;
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}
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if (isBitSet(in.flags, ApfProgramEvent.FLAG_HAS_IPV4_ADDRESS)) {
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apfProgramEvent.hasIpv4Addr = true;
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}
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out.setApfProgramEvent(apfProgramEvent);
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}
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private static void setApfStats(IpConnectivityEvent out, ApfStats in) {
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IpConnectivityLogClass.ApfStatistics apfStatistics =
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new IpConnectivityLogClass.ApfStatistics();
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apfStatistics.durationMs = in.durationMs;
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apfStatistics.receivedRas = in.receivedRas;
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apfStatistics.matchingRas = in.matchingRas;
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apfStatistics.droppedRas = in.droppedRas;
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apfStatistics.zeroLifetimeRas = in.zeroLifetimeRas;
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apfStatistics.parseErrors = in.parseErrors;
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apfStatistics.programUpdates = in.programUpdates;
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apfStatistics.programUpdatesAll = in.programUpdatesAll;
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apfStatistics.programUpdatesAllowingMulticast = in.programUpdatesAllowingMulticast;
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apfStatistics.maxProgramSize = in.maxProgramSize;
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out.setApfStatistics(apfStatistics);
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}
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private static void setRaEvent(IpConnectivityEvent out, RaEvent in) {
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IpConnectivityLogClass.RaEvent raEvent = new IpConnectivityLogClass.RaEvent();
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raEvent.routerLifetime = in.routerLifetime;
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raEvent.prefixValidLifetime = in.prefixValidLifetime;
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raEvent.prefixPreferredLifetime = in.prefixPreferredLifetime;
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raEvent.routeInfoLifetime = in.routeInfoLifetime;
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raEvent.rdnssLifetime = in.rdnssLifetime;
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raEvent.dnsslLifetime = in.dnsslLifetime;
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out.setRaEvent(raEvent);
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}
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private static int[] bytesToInts(byte[] in) {
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final int[] out = new int[in.length];
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for (int i = 0; i < in.length; i++) {
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out[i] = in[i] & 0xFF;
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}
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return out;
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}
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private static Pair[] toPairArray(SparseIntArray counts) {
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final int s = counts.size();
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Pair[] pairs = new Pair[s];
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for (int i = 0; i < s; i++) {
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Pair p = new Pair();
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p.key = counts.keyAt(i);
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p.value = counts.valueAt(i);
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pairs[i] = p;
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}
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return pairs;
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}
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private static int ipSupportOf(DefaultNetworkEvent in) {
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if (in.ipv4 && in.ipv6) {
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return IpConnectivityLogClass.DefaultNetworkEvent.DUAL;
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}
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if (in.ipv6) {
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return IpConnectivityLogClass.DefaultNetworkEvent.IPV6;
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}
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if (in.ipv4) {
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return IpConnectivityLogClass.DefaultNetworkEvent.IPV4;
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}
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return IpConnectivityLogClass.DefaultNetworkEvent.NONE;
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}
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private static boolean isBitSet(int flags, int bit) {
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return (flags & (1 << bit)) != 0;
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}
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private static void inferLinkLayer(IpConnectivityEvent ev) {
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int linkLayer = IpConnectivityLogClass.UNKNOWN;
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if (ev.transports != 0) {
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linkLayer = transportsToLinkLayer(ev.transports);
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} else if (ev.ifName != null) {
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linkLayer = ifnameToLinkLayer(ev.ifName);
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}
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if (linkLayer == IpConnectivityLogClass.UNKNOWN) {
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return;
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}
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ev.linkLayer = linkLayer;
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ev.ifName = "";
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}
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private static int transportsToLinkLayer(long transports) {
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switch (Long.bitCount(transports)) {
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case 0:
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return IpConnectivityLogClass.UNKNOWN;
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case 1:
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int t = Long.numberOfTrailingZeros(transports);
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return transportToLinkLayer(t);
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default:
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return IpConnectivityLogClass.MULTIPLE;
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}
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}
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private static int transportToLinkLayer(int transport) {
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if (0 <= transport && transport < TRANSPORT_LINKLAYER_MAP.length) {
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return TRANSPORT_LINKLAYER_MAP[transport];
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}
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return IpConnectivityLogClass.UNKNOWN;
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}
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private static final int[] TRANSPORT_LINKLAYER_MAP = new int[MAX_TRANSPORT + 1];
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static {
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TRANSPORT_LINKLAYER_MAP[TRANSPORT_CELLULAR] = IpConnectivityLogClass.CELLULAR;
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TRANSPORT_LINKLAYER_MAP[TRANSPORT_WIFI] = IpConnectivityLogClass.WIFI;
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TRANSPORT_LINKLAYER_MAP[TRANSPORT_BLUETOOTH] = IpConnectivityLogClass.BLUETOOTH;
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TRANSPORT_LINKLAYER_MAP[TRANSPORT_ETHERNET] = IpConnectivityLogClass.ETHERNET;
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TRANSPORT_LINKLAYER_MAP[TRANSPORT_VPN] = IpConnectivityLogClass.UNKNOWN;
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TRANSPORT_LINKLAYER_MAP[TRANSPORT_WIFI_AWARE] = IpConnectivityLogClass.WIFI_NAN;
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TRANSPORT_LINKLAYER_MAP[TRANSPORT_LOWPAN] = IpConnectivityLogClass.LOWPAN;
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};
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private static int ifnameToLinkLayer(String ifname) {
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// Do not try to catch all interface names with regexes, instead only catch patterns that
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// are cheap to check, and otherwise fallback on postprocessing in aggregation layer.
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for (int i = 0; i < KNOWN_PREFIX; i++) {
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String pattern = IFNAME_PREFIXES[i];
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if (ifname.startsWith(pattern)) {
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return IFNAME_LINKLAYERS[i];
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}
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}
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return IpConnectivityLogClass.UNKNOWN;
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}
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private static final int KNOWN_PREFIX = 7;
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private static final String[] IFNAME_PREFIXES = new String[KNOWN_PREFIX];
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private static final int[] IFNAME_LINKLAYERS = new int[KNOWN_PREFIX];
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static {
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// Ordered from most likely link layer to least likely.
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IFNAME_PREFIXES[0] = "rmnet";
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IFNAME_LINKLAYERS[0] = IpConnectivityLogClass.CELLULAR;
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IFNAME_PREFIXES[1] = "wlan";
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IFNAME_LINKLAYERS[1] = IpConnectivityLogClass.WIFI;
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IFNAME_PREFIXES[2] = "bt-pan";
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IFNAME_LINKLAYERS[2] = IpConnectivityLogClass.BLUETOOTH;
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IFNAME_PREFIXES[3] = "p2p";
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IFNAME_LINKLAYERS[3] = IpConnectivityLogClass.WIFI_P2P;
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IFNAME_PREFIXES[4] = "aware";
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IFNAME_LINKLAYERS[4] = IpConnectivityLogClass.WIFI_NAN;
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IFNAME_PREFIXES[5] = "eth";
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IFNAME_LINKLAYERS[5] = IpConnectivityLogClass.ETHERNET;
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IFNAME_PREFIXES[6] = "wpan";
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IFNAME_LINKLAYERS[6] = IpConnectivityLogClass.LOWPAN;
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}
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}
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