--- /dev/null
+/*
+ * 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.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * {@hide}
+ */
+public class DnsEvent extends IpConnectivityEvent implements Parcelable {
+ public final int netId;
+
+ // The event type is currently only 1 or 2, so we store it as a byte.
+ public final byte[] eventTypes;
+ // Current getaddrinfo codes go from 1 to EAI_MAX = 15. gethostbyname returns errno, but there
+ // are fewer than 255 errno values. So we store the result code in a byte as well.
+ public final byte[] returnCodes;
+ // The latency is an integer because a) short arrays aren't parcelable and b) a short can only
+ // store a maximum latency of 32757 or 65535 ms, which is too short for pathologically slow
+ // queries.
+ public final int[] latenciesMs;
+
+ private DnsEvent(int netId, byte[] eventTypes, byte[] returnCodes, int[] latenciesMs) {
+ this.netId = netId;
+ this.eventTypes = eventTypes;
+ this.returnCodes = returnCodes;
+ this.latenciesMs = latenciesMs;
+ }
+
+ private DnsEvent(Parcel in) {
+ netId = in.readInt();
+ eventTypes = in.createByteArray();
+ returnCodes = in.createByteArray();
+ latenciesMs = in.createIntArray();
+ }
+
+ @Override
+ public void writeToParcel(Parcel out, int flags) {
+ out.writeInt(netId);
+ out.writeByteArray(eventTypes);
+ out.writeByteArray(returnCodes);
+ out.writeIntArray(latenciesMs);
+ }
+
+ public static final Parcelable.Creator<DnsEvent> CREATOR = new Parcelable.Creator<DnsEvent>() {
+ @Override
+ public DnsEvent createFromParcel(Parcel in) {
+ return new DnsEvent(in);
+ }
+
+ @Override
+ public DnsEvent[] newArray(int size) {
+ return new DnsEvent[size];
+ }
+ };
+
+ public static void logEvent(
+ int netId, byte[] eventTypes, byte[] returnCodes, int[] latenciesMs) {
+ IpConnectivityEvent.logEvent(IPCE_DNS_LOOKUPS,
+ new DnsEvent(netId, eventTypes, returnCodes, latenciesMs));
+ }
+}
* {@hide}
*/
public class IpConnectivityEvent implements Parcelable {
- // IPRM = IpReachabilityMonitor
- // DHCP = DhcpClient
+ public static final String TAG = "IpConnectivityEvent";
+
+ // IPRM = IpReachabilityMonitor
+ // DHCP = DhcpClient
// NETMON = NetworkMonitorEvent
// CONSRV = ConnectivityServiceEvent
- // IPMGR = IpManager
- public static final String TAG = "IpConnectivityEvent";
- public static final int IPCE_IPRM_BASE = 0*1024;
- public static final int IPCE_DHCP_BASE = 1*1024;
- public static final int IPCE_NETMON_BASE = 2*1024;
- public static final int IPCE_CONSRV_BASE = 3*1024;
- public static final int IPCE_IPMGR_BASE = 4*1024;
+ // IPMGR = IpManager
+ public static final int IPCE_IPRM_BASE = 0 * 1024;
+ public static final int IPCE_DHCP_BASE = 1 * 1024;
+ public static final int IPCE_NETMON_BASE = 2 * 1024;
+ public static final int IPCE_CONSRV_BASE = 3 * 1024;
+ public static final int IPCE_IPMGR_BASE = 4 * 1024;
+ public static final int IPCE_DNS_BASE = 5 * 1024;
+
+ public static final int IPCE_IPRM_PROBE_RESULT = IPCE_IPRM_BASE + 0;
+ public static final int IPCE_IPRM_MESSAGE_RECEIVED = IPCE_IPRM_BASE + 1;
+ public static final int IPCE_IPRM_REACHABILITY_LOST = IPCE_IPRM_BASE + 2;
+
+ public static final int IPCE_DHCP_RECV_ERROR = IPCE_DHCP_BASE + 0;
+ public static final int IPCE_DHCP_PARSE_ERROR = IPCE_DHCP_BASE + 1;
+ public static final int IPCE_DHCP_TIMEOUT = IPCE_DHCP_BASE + 2;
+ public static final int IPCE_DHCP_STATE_CHANGE = IPCE_DHCP_BASE + 3;
+
+ public static final int IPCE_NETMON_STATE_CHANGE = IPCE_NETMON_BASE + 0;
+ public static final int IPCE_NETMON_CHECK_RESULT = IPCE_NETMON_BASE + 1;
- public static final int IPCE_IPRM_PROBE_RESULT = IPCE_IPRM_BASE + 0;
- public static final int IPCE_IPRM_MESSAGE_RECEIVED = IPCE_IPRM_BASE + 1;
- public static final int IPCE_IPRM_REACHABILITY_LOST = IPCE_IPRM_BASE + 2;
- public static final int IPCE_DHCP_RECV_ERROR = IPCE_DHCP_BASE + 0;
- public static final int IPCE_DHCP_PARSE_ERROR = IPCE_DHCP_BASE + 1;
- public static final int IPCE_DHCP_TIMEOUT = IPCE_DHCP_BASE + 2;
- public static final int IPCE_DHCP_STATE_CHANGE = IPCE_DHCP_BASE + 3;
- public static final int IPCE_NETMON_STATE_CHANGE = IPCE_NETMON_BASE + 0;
- public static final int IPCE_NETMON_CHECK_RESULT = IPCE_NETMON_BASE + 1;
public static final int IPCE_CONSRV_DEFAULT_NET_CHANGE = IPCE_CONSRV_BASE + 0;
- public static final int IPCE_IPMGR_PROVISIONING_OK = IPCE_IPMGR_BASE + 0;
- public static final int IPCE_IPMGR_PROVISIONING_FAIL = IPCE_IPMGR_BASE + 1;
- public static final int IPCE_IPMGR_COMPLETE_LIFECYCLE = IPCE_IPMGR_BASE + 2;
+
+ public static final int IPCE_IPMGR_PROVISIONING_OK = IPCE_IPMGR_BASE + 0;
+ public static final int IPCE_IPMGR_PROVISIONING_FAIL = IPCE_IPMGR_BASE + 1;
+ public static final int IPCE_IPMGR_COMPLETE_LIFECYCLE = IPCE_IPMGR_BASE + 2;
+
+ public static final int IPCE_DNS_LOOKUPS = IPCE_DNS_BASE + 0;
private static ConnectivityMetricsLogger mMetricsLogger = new ConnectivityMetricsLogger();
LOCAL_MODULE := services.core
+LOCAL_AIDL_INCLUDES := system/netd/server/binder
+
LOCAL_SRC_FILES += \
$(call all-java-files-under,java) \
java/com/android/server/EventLogTags.logtags \
java/com/android/server/am/EventLogTags.logtags \
- ../../../../system/netd/server/binder/android/net/INetd.aidl
+ ../../../../system/netd/server/binder/android/net/INetd.aidl \
+ ../../../../system/netd/server/binder/android/net/metrics/IDnsEventListener.aidl \
LOCAL_JAVA_LIBRARIES := services.net telephony-common
LOCAL_STATIC_JAVA_LIBRARIES := tzdata_update
--- /dev/null
+/*
+ * 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 com.android.server.connectivity;
+
+import android.content.Context;
+import android.net.metrics.DnsEvent;
+import android.net.ConnectivityManager;
+import android.net.ConnectivityManager.NetworkCallback;
+import android.net.Network;
+import android.net.NetworkRequest;
+import android.net.metrics.IDnsEventListener;
+import android.util.Log;
+
+import com.android.internal.annotations.GuardedBy;
+import com.android.internal.util.IndentingPrintWriter;
+
+import java.io.PrintWriter;
+import java.util.Arrays;
+import java.util.SortedMap;
+import java.util.TreeMap;
+
+
+/**
+ * Implementation of the IDnsEventListener interface.
+ */
+public class DnsEventListenerService extends IDnsEventListener.Stub {
+
+ public static final String SERVICE_NAME = "dns_listener";
+
+ private static final String TAG = DnsEventListenerService.class.getSimpleName();
+ private static final boolean DBG = true;
+ private static final boolean VDBG = false;
+
+ private static final int MAX_LOOKUPS_PER_DNS_EVENT = 100;
+
+ // Stores the results of a number of consecutive DNS lookups on the same network.
+ // This class is not thread-safe and it is the responsibility of the service to call its methods
+ // on one thread at a time.
+ private static class DnsEventBatch {
+ private final int mNetId;
+
+ private final byte[] mEventTypes = new byte[MAX_LOOKUPS_PER_DNS_EVENT];
+ private final byte[] mReturnCodes = new byte[MAX_LOOKUPS_PER_DNS_EVENT];
+ private final int[] mLatenciesMs = new int[MAX_LOOKUPS_PER_DNS_EVENT];
+ private int mEventCount;
+
+ public DnsEventBatch(int netId) {
+ mNetId = netId;
+ }
+
+ public void addResult(byte eventType, byte returnCode, int latencyMs) {
+ mEventTypes[mEventCount] = eventType;
+ mReturnCodes[mEventCount] = returnCode;
+ mLatenciesMs[mEventCount] = latencyMs;
+ mEventCount++;
+ if (mEventCount == MAX_LOOKUPS_PER_DNS_EVENT) {
+ logAndClear();
+ }
+ }
+
+ public void logAndClear() {
+ // Did we lose a race with addResult?
+ if (mEventCount == 0) {
+ return;
+ }
+
+ byte[] returnCodes = Arrays.copyOf(mReturnCodes, mEventCount);
+ int[] latenciesMs = Arrays.copyOf(mLatenciesMs, mEventCount);
+ DnsEvent.logEvent(mNetId, mEventTypes, mReturnCodes, mLatenciesMs);
+ maybeLog(String.format("Logging %d results for netId %d", mEventCount, mNetId));
+ mEventCount = 0;
+ }
+
+ // For debugging and unit tests only.
+ public String toString() {
+ return String.format("%s %d %d", getClass().getSimpleName(), mNetId, mEventCount);
+ }
+ }
+
+ // Only sorted for ease of debugging. Because we only typically have a handful of networks up
+ // at any given time, performance is not a concern.
+ @GuardedBy("this")
+ private SortedMap<Integer, DnsEventBatch> mEventBatches = new TreeMap<>();
+
+ // We register a NetworkCallback to ensure that when a network disconnects, we flush the DNS
+ // queries we've logged on that network. Because we do not do this periodically, we might lose
+ // up to MAX_LOOKUPS_PER_DNS_EVENT lookup stats on each network when the system is shutting
+ // down. We believe this to be sufficient for now.
+ private final ConnectivityManager mCm;
+ private final NetworkCallback mNetworkCallback = new NetworkCallback() {
+ @Override
+ public void onLost(Network network) {
+ synchronized (DnsEventListenerService.this) {
+ DnsEventBatch batch = mEventBatches.remove(network.netId);
+ if (batch != null) {
+ batch.logAndClear();
+ }
+ }
+ }
+ };
+
+ public DnsEventListenerService(Context context) {
+ // We are started when boot is complete, so ConnectivityService should already be running.
+ final NetworkRequest request = new NetworkRequest.Builder()
+ .clearCapabilities()
+ .build();
+ mCm = context.getSystemService(ConnectivityManager.class);
+ mCm.registerNetworkCallback(request, mNetworkCallback);
+ }
+
+ @Override
+ // Called concurrently by multiple binder threads.
+ public synchronized void onDnsEvent(int netId, int eventType, int returnCode, int latencyMs) {
+ maybeVerboseLog(String.format("onDnsEvent(%d, %d, %d, %d)",
+ netId, eventType, returnCode, latencyMs));
+
+ DnsEventBatch batch = mEventBatches.get(netId);
+ if (batch == null) {
+ batch = new DnsEventBatch(netId);
+ mEventBatches.put(netId, batch);
+ }
+ batch.addResult((byte) eventType, (byte) returnCode, latencyMs);
+ }
+
+ public synchronized void dump(PrintWriter writer) {
+ IndentingPrintWriter pw = new IndentingPrintWriter(writer, " ");
+ pw.println(TAG + ":");
+ pw.increaseIndent();
+ for (DnsEventBatch batch : mEventBatches.values()) {
+ pw.println(batch.toString());
+ }
+ pw.decreaseIndent();
+ }
+
+ private static void maybeLog(String s) {
+ if (DBG) Log.d(TAG, s);
+ }
+
+ private static void maybeVerboseLog(String s) {
+ if (VDBG) Log.d(TAG, s);
+ }
+}
if (DBG) Log.d(TAG, "onBootPhase: PHASE_SYSTEM_SERVICES_READY");
publishBinderService(ConnectivityMetricsLogger.CONNECTIVITY_METRICS_LOGGER_SERVICE,
mBinder);
+ mDnsListener = new DnsEventListenerService(getContext());
+ publishBinderService(mDnsListener.SERVICE_NAME, mDnsListener);
}
}
private final ArrayDeque<ConnectivityMetricsEvent> mEvents = new ArrayDeque<>();
+ private DnsEventListenerService mDnsListener;
+
private void enforceConnectivityInternalPermission() {
getContext().enforceCallingOrSelfPermission(
android.Manifest.permission.CONNECTIVITY_INTERNAL,
synchronized (mEvents) {
pw.println("Number of events: " + mEvents.size());
- pw.println("Time span: " +
- DateUtils.formatElapsedTime(
- (System.currentTimeMillis() - mEvents.peekFirst().timestamp)
- / 1000));
+ if (mEvents.size() > 0) {
+ pw.println("Time span: " +
+ DateUtils.formatElapsedTime(
+ (System.currentTimeMillis() - mEvents.peekFirst().timestamp)
+ / 1000));
+ }
if (dumpSerializedSize) {
long dataSize = 0;
pw.println(pi.toString());
}
}
+
+ pw.println();
+ mDnsListener.dump(pw);
}
public long logEvent(ConnectivityMetricsEvent event) {
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