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Commit 03848c53 authored by Ling Ma's avatar Ling Ma
Browse files

Add anomaly report for excessive unwanted network in the new data stack 

Test: manual
Bug: 222031425
Change-Id: I9914991366029848231e47edc86797cd6705a584
parent af61bc2a

src/java/com/android/internal/telephony/data/TelephonyNetworkAgent.java

+39 −0
Original line number Diff line number Diff line
@@ -22,24 +22,29 @@ import android.annotation.Nullable; 
import android.net.KeepalivePacketData;

import android.net.NetworkAgent;

import android.net.NetworkAgentConfig;

import android.net.NetworkCapabilities;

import android.net.NetworkProvider;

import android.net.NetworkScore;

import android.net.QosFilter;

import android.net.QosSessionAttributes;

import android.net.Uri;

import android.os.Looper;

import android.telephony.AnomalyReporter;

import android.util.ArraySet;

import android.util.IndentingPrintWriter;

import android.util.LocalLog;



import com.android.internal.telephony.Phone;

import com.android.internal.telephony.SlidingWindowEventCounter;

import com.android.telephony.Rlog;



import java.io.FileDescriptor;

import java.io.PrintWriter;

import java.time.Duration;

import java.util.Set;

import java.util.UUID;

import java.util.concurrent.Executor;

import java.util.concurrent.TimeUnit;



/**

 * TelephonyNetworkAgent class represents a single PDN (Packet Data Network). It is an agent
@@ -51,6 +56,13 @@ public class TelephonyNetworkAgent extends NetworkAgent implements NotifyQosSess 
    private final Phone mPhone;

    private final LocalLog mLocalLog = new LocalLog(128);



    /** Event counter for unwanted network within time window, is used to trigger anomaly report. */

    private static final long NETWORK_UNWANTED_ANOMALY_WINDOW_MS = TimeUnit.MINUTES.toMillis(5);

    private static final int NETWORK_UNWANTED_ANOMALY_NUM_OCCURRENCES =  12;

    private static final SlidingWindowEventCounter sNetworkUnwantedCounter =

            new SlidingWindowEventCounter(NETWORK_UNWANTED_ANOMALY_WINDOW_MS,

                    NETWORK_UNWANTED_ANOMALY_NUM_OCCURRENCES);



    /** The parent data network. */

    private final @NonNull DataNetwork mDataNetwork;
@@ -172,9 +184,36 @@ public class TelephonyNetworkAgent extends NetworkAgent implements NotifyQosSess 
            log("The agent is already abandoned. Ignored onNetworkUnwanted.");

            return;

        }



        NetworkCapabilities capabilities = mDataNetwork.getNetworkCapabilities();

        if (capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_IMS)

                || capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)) {

            trackNetworkUnwanted();

        }



        mDataNetwork.tearDown(DataNetwork.TEAR_DOWN_REASON_CONNECTIVITY_SERVICE_UNWANTED);

    }



    /**

     * There have been several bugs where a RECONNECT loop kicks off where a DataConnection

     * connects to the Network, ConnectivityService indicates that the Network is unwanted,

     * and then the DataConnection reconnects. By the time we get the bug report it's too late

     * because there have already been hundreds of RECONNECTS.  This is meant to capture the issue

     * when it first starts.

     *

     * The unwanted counter is configured to only take an anomaly report in extreme cases.

     * This is to avoid having the anomaly message show up on several devices.

     *

     */

    private void trackNetworkUnwanted() {

        if (sNetworkUnwantedCounter.addOccurrence()) {

            AnomalyReporter.reportAnomaly(

                    UUID.fromString("9f3bc55b-bfa6-4e26-afaa-5031426a66d1"),

                    "Network Unwanted called 12 times in 5 minutes.");

        }

    }





    /**

     * @return The unique id of the agent.

     */