diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index f478071..744ee8e 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -582,6 +582,8 @@
     /** {@hide} */
     public static final int MAX_NETWORK_TYPE = TYPE_VPN;
 
+    private static final int MIN_NETWORK_TYPE = TYPE_MOBILE;
+
     /**
      * If you want to set the default network preference,you can directly
      * change the networkAttributes array in framework's config.xml.
@@ -599,7 +601,7 @@
     /**
      * @hide
      */
-    public final static int REQUEST_ID_UNSET = 0;
+    public static final int REQUEST_ID_UNSET = 0;
 
     /**
      * Static unique request used as a tombstone for NetworkCallbacks that have been unregistered.
@@ -607,7 +609,7 @@
      * registered and those that were already unregistered.
      * @hide
      */
-    private final static NetworkRequest ALREADY_UNREGISTERED =
+    private static final NetworkRequest ALREADY_UNREGISTERED =
             new NetworkRequest.Builder().clearCapabilities().build();
 
     /**
@@ -640,7 +642,7 @@
      */
     @Deprecated
     public static boolean isNetworkTypeValid(int networkType) {
-        return networkType >= 0 && networkType <= MAX_NETWORK_TYPE;
+        return MIN_NETWORK_TYPE <= networkType && networkType <= MAX_NETWORK_TYPE;
     }
 
     /**
@@ -653,6 +655,8 @@
      */
     public static String getNetworkTypeName(int type) {
         switch (type) {
+          case TYPE_NONE:
+                return "NONE";
             case TYPE_MOBILE:
                 return "MOBILE";
             case TYPE_WIFI:
@@ -831,6 +835,29 @@
     }
 
     /**
+     * Checks if a VPN app supports always-on mode.
+     *
+     * In order to support the always-on feature, an app has to
+     * <ul>
+     *     <li>target {@link VERSION_CODES#N API 24} or above, and
+     *     <li>not opt out through the {@link VpnService#SERVICE_META_DATA_SUPPORTS_ALWAYS_ON}
+     *         meta-data field.
+     * </ul>
+     *
+     * @param userId The identifier of the user for whom the VPN app is installed.
+     * @param vpnPackage The canonical package name of the VPN app.
+     * @return {@code true} if and only if the VPN app exists and supports always-on mode.
+     * @hide
+     */
+    public boolean isAlwaysOnVpnPackageSupportedForUser(int userId, @Nullable String vpnPackage) {
+        try {
+            return mService.isAlwaysOnVpnPackageSupported(userId, vpnPackage);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
      * Configures an always-on VPN connection through a specific application.
      * This connection is automatically granted and persisted after a reboot.
      *
@@ -1098,6 +1125,7 @@
      * @hide
      */
     @SystemApi
+    @RequiresPermission(android.Manifest.permission.LOCAL_MAC_ADDRESS)
     public String getCaptivePortalServerUrl() {
         try {
             return mService.getCaptivePortalServerUrl();
@@ -1715,14 +1743,8 @@
         // ignored
     }
 
-    /**
-     * Return quota status for the current active network, or {@code null} if no
-     * network is active. Quota status can change rapidly, so these values
-     * shouldn't be cached.
-     *
-     * @hide
-     */
-    @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    /** {@hide} */
+    @Deprecated
     public NetworkQuotaInfo getActiveNetworkQuotaInfo() {
         try {
             return mService.getActiveNetworkQuotaInfo();
@@ -2061,10 +2083,11 @@
      * {@hide}
      */
     @SystemApi
-    @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @RequiresPermission(android.Manifest.permission.TETHER_PRIVILEGED)
     public boolean isTetheringSupported() {
         try {
-            return mService.isTetheringSupported();
+            String pkgName = mContext.getOpPackageName();
+            return mService.isTetheringSupported(pkgName);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
@@ -2094,6 +2117,7 @@
      * @hide
      */
     @SystemApi
+    @RequiresPermission(android.Manifest.permission.TETHER_PRIVILEGED)
     public void startTethering(int type, boolean showProvisioningUi,
             final OnStartTetheringCallback callback) {
         startTethering(type, showProvisioningUi, callback, null);
diff --git a/core/java/android/net/IConnectivityManager.aidl b/core/java/android/net/IConnectivityManager.aidl
index 27729dc..a6fe738 100644
--- a/core/java/android/net/IConnectivityManager.aidl
+++ b/core/java/android/net/IConnectivityManager.aidl
@@ -75,7 +75,7 @@
 
     int getLastTetherError(String iface);
 
-    boolean isTetheringSupported();
+    boolean isTetheringSupported(String callerPkg);
 
     void startTethering(int type, in ResultReceiver receiver, boolean showProvisioningUi,
             String callerPkg);
@@ -123,6 +123,7 @@
     VpnInfo[] getAllVpnInfo();
 
     boolean updateLockdownVpn();
+    boolean isAlwaysOnVpnPackageSupported(int userId, String packageName);
     boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown);
     String getAlwaysOnVpnPackage(int userId);
 
diff --git a/core/java/android/net/IpPrefix.java b/core/java/android/net/IpPrefix.java
index 6b4f2d5..6e2654e 100644
--- a/core/java/android/net/IpPrefix.java
+++ b/core/java/android/net/IpPrefix.java
@@ -20,6 +20,8 @@
 import android.os.Parcelable;
 import android.util.Pair;
 
+import java.net.Inet4Address;
+import java.net.Inet6Address;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.util.Arrays;
@@ -185,6 +187,20 @@
     }
 
     /**
+     * @hide
+     */
+    public boolean isIPv6() {
+        return getAddress() instanceof Inet6Address;
+    }
+
+    /**
+     * @hide
+     */
+    public boolean isIPv4() {
+        return getAddress() instanceof Inet4Address;
+    }
+
+    /**
      * Returns a string representation of this {@code IpPrefix}.
      *
      * @return a string such as {@code "192.0.2.0/24"} or {@code "2001:db8:1:2::/64"}.
diff --git a/core/java/android/net/LinkAddress.java b/core/java/android/net/LinkAddress.java
index 6e74f14..bcfe938 100644
--- a/core/java/android/net/LinkAddress.java
+++ b/core/java/android/net/LinkAddress.java
@@ -16,6 +16,15 @@
 
 package android.net;
 
+import static android.system.OsConstants.IFA_F_DADFAILED;
+import static android.system.OsConstants.IFA_F_DEPRECATED;
+import static android.system.OsConstants.IFA_F_OPTIMISTIC;
+import static android.system.OsConstants.IFA_F_TENTATIVE;
+import static android.system.OsConstants.RT_SCOPE_HOST;
+import static android.system.OsConstants.RT_SCOPE_LINK;
+import static android.system.OsConstants.RT_SCOPE_SITE;
+import static android.system.OsConstants.RT_SCOPE_UNIVERSE;
+
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.Pair;
@@ -26,15 +35,6 @@
 import java.net.InterfaceAddress;
 import java.net.UnknownHostException;
 
-import static android.system.OsConstants.IFA_F_DADFAILED;
-import static android.system.OsConstants.IFA_F_DEPRECATED;
-import static android.system.OsConstants.IFA_F_OPTIMISTIC;
-import static android.system.OsConstants.IFA_F_TENTATIVE;
-import static android.system.OsConstants.RT_SCOPE_HOST;
-import static android.system.OsConstants.RT_SCOPE_LINK;
-import static android.system.OsConstants.RT_SCOPE_SITE;
-import static android.system.OsConstants.RT_SCOPE_UNIVERSE;
-
 /**
  * Identifies an IP address on a network link.
  *
@@ -76,7 +76,7 @@
      * RFC 6724 section 3.2.
      * @hide
      */
-    static int scopeForUnicastAddress(InetAddress addr) {
+    private static int scopeForUnicastAddress(InetAddress addr) {
         if (addr.isAnyLocalAddress()) {
             return RT_SCOPE_HOST;
         }
@@ -101,7 +101,7 @@
      * Per RFC 4193 section 8, fc00::/7 identifies these addresses.
      */
     private boolean isIPv6ULA() {
-        if (address != null && address instanceof Inet6Address) {
+        if (isIPv6()) {
             byte[] bytes = address.getAddress();
             return ((bytes[0] & (byte)0xfe) == (byte)0xfc);
         }
@@ -109,13 +109,29 @@
     }
 
     /**
+     * @return true if the address is IPv6.
+     * @hide
+     */
+    public boolean isIPv6() {
+        return address instanceof Inet6Address;
+    }
+
+    /**
+     * @return true if the address is IPv4 or is a mapped IPv4 address.
+     * @hide
+     */
+    public boolean isIPv4() {
+        return address instanceof Inet4Address;
+    }
+
+    /**
      * Utility function for the constructors.
      */
     private void init(InetAddress address, int prefixLength, int flags, int scope) {
         if (address == null ||
                 address.isMulticastAddress() ||
                 prefixLength < 0 ||
-                ((address instanceof Inet4Address) && prefixLength > 32) ||
+                (address instanceof Inet4Address && prefixLength > 32) ||
                 (prefixLength > 128)) {
             throw new IllegalArgumentException("Bad LinkAddress params " + address +
                     "/" + prefixLength);
@@ -184,6 +200,7 @@
      */
     public LinkAddress(String address, int flags, int scope) {
         // This may throw an IllegalArgumentException; catching it is the caller's responsibility.
+        // TODO: consider rejecting mapped IPv4 addresses such as "::ffff:192.0.2.5/24".
         Pair<InetAddress, Integer> ipAndMask = NetworkUtils.parseIpAndMask(address);
         init(ipAndMask.first, ipAndMask.second, flags, scope);
     }
diff --git a/core/java/android/net/NetworkCapabilities.java b/core/java/android/net/NetworkCapabilities.java
index 0a5b9c1..4bb8844 100644
--- a/core/java/android/net/NetworkCapabilities.java
+++ b/core/java/android/net/NetworkCapabilities.java
@@ -21,6 +21,7 @@
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.BitUtils;
+import com.android.internal.util.Preconditions;
 
 import java.util.Objects;
 import java.util.StringJoiner;
@@ -416,7 +417,6 @@
 
     /**
      * Indicates this network uses a LoWPAN transport.
-     * @hide
      */
     public static final int TRANSPORT_LOWPAN = 6;
 
@@ -425,6 +425,11 @@
     /** @hide */
     public static final int MAX_TRANSPORT = TRANSPORT_LOWPAN;
 
+    /** @hide */
+    public static boolean isValidTransport(int transportType) {
+        return (MIN_TRANSPORT <= transportType) && (transportType <= MAX_TRANSPORT);
+    }
+
     private static final String[] TRANSPORT_NAMES = {
         "CELLULAR",
         "WIFI",
@@ -449,9 +454,7 @@
      * @hide
      */
     public NetworkCapabilities addTransportType(int transportType) {
-        if (transportType < MIN_TRANSPORT || transportType > MAX_TRANSPORT) {
-            throw new IllegalArgumentException("TransportType out of range");
-        }
+        checkValidTransportType(transportType);
         mTransportTypes |= 1 << transportType;
         setNetworkSpecifier(mNetworkSpecifier); // used for exception checking
         return this;
@@ -465,9 +468,7 @@
      * @hide
      */
     public NetworkCapabilities removeTransportType(int transportType) {
-        if (transportType < MIN_TRANSPORT || transportType > MAX_TRANSPORT) {
-            throw new IllegalArgumentException("TransportType out of range");
-        }
+        checkValidTransportType(transportType);
         mTransportTypes &= ~(1 << transportType);
         setNetworkSpecifier(mNetworkSpecifier); // used for exception checking
         return this;
@@ -491,10 +492,7 @@
      * @return {@code true} if set on this instance.
      */
     public boolean hasTransport(int transportType) {
-        if (transportType < MIN_TRANSPORT || transportType > MAX_TRANSPORT) {
-            return false;
-        }
-        return ((mTransportTypes & (1 << transportType)) != 0);
+        return isValidTransport(transportType) && ((mTransportTypes & (1 << transportType)) != 0);
     }
 
     private void combineTransportTypes(NetworkCapabilities nc) {
@@ -772,7 +770,6 @@
 
         StringJoiner joiner = new StringJoiner(", ");
 
-        // TODO: consider only enforcing that capabilities are not removed, allowing addition.
         // Ignore NOT_METERED being added or removed as it is effectively dynamic. http://b/63326103
         // TODO: properly support NOT_METERED as a mutable and requestable capability.
         final long mask = ~MUTABLE_CAPABILITIES & ~(1 << NET_CAPABILITY_NOT_METERED);
@@ -954,9 +951,14 @@
      * @hide
      */
     public static String transportNameOf(int transport) {
-        if (transport < 0 || TRANSPORT_NAMES.length <= transport) {
+        if (!isValidTransport(transport)) {
             return "UNKNOWN";
         }
         return TRANSPORT_NAMES[transport];
     }
+
+    private static void checkValidTransportType(int transport) {
+        Preconditions.checkArgument(
+                isValidTransport(transport), "Invalid TransportType " + transport);
+    }
 }
diff --git a/core/java/android/net/NetworkInfo.java b/core/java/android/net/NetworkInfo.java
index 42f5feb..818aa21 100644
--- a/core/java/android/net/NetworkInfo.java
+++ b/core/java/android/net/NetworkInfo.java
@@ -16,8 +16,8 @@
 
 package android.net;
 
-import android.os.Parcelable;
 import android.os.Parcel;
+import android.os.Parcelable;
 
 import com.android.internal.annotations.VisibleForTesting;
 
@@ -121,13 +121,13 @@
     private boolean mIsFailover;
     private boolean mIsAvailable;
     private boolean mIsRoaming;
-    private boolean mIsMetered;
 
     /**
      * @hide
      */
     public NetworkInfo(int type, int subtype, String typeName, String subtypeName) {
-        if (!ConnectivityManager.isNetworkTypeValid(type)) {
+        if (!ConnectivityManager.isNetworkTypeValid(type)
+                && type != ConnectivityManager.TYPE_NONE) {
             throw new IllegalArgumentException("Invalid network type: " + type);
         }
         mNetworkType = type;
@@ -153,7 +153,6 @@
                 mIsFailover = source.mIsFailover;
                 mIsAvailable = source.mIsAvailable;
                 mIsRoaming = source.mIsRoaming;
-                mIsMetered = source.mIsMetered;
             }
         }
     }
@@ -326,31 +325,6 @@
     }
 
     /**
-     * Returns if this network is metered. A network is classified as metered
-     * when the user is sensitive to heavy data usage on that connection due to
-     * monetary costs, data limitations or battery/performance issues. You
-     * should check this before doing large data transfers, and warn the user or
-     * delay the operation until another network is available.
-     *
-     * @return {@code true} if large transfers should be avoided, otherwise
-     *         {@code false}.
-     * @hide
-     */
-    public boolean isMetered() {
-        synchronized (this) {
-            return mIsMetered;
-        }
-    }
-
-    /** {@hide} */
-    @VisibleForTesting
-    public void setMetered(boolean isMetered) {
-        synchronized (this) {
-            mIsMetered = isMetered;
-        }
-    }
-
-    /**
      * Reports the current coarse-grained state of the network.
      * @return the coarse-grained state
      */
@@ -433,7 +407,6 @@
             append(", failover: ").append(mIsFailover).
             append(", available: ").append(mIsAvailable).
             append(", roaming: ").append(mIsRoaming).
-            append(", metered: ").append(mIsMetered).
             append("]");
             return builder.toString();
         }
@@ -456,7 +429,6 @@
             dest.writeInt(mIsFailover ? 1 : 0);
             dest.writeInt(mIsAvailable ? 1 : 0);
             dest.writeInt(mIsRoaming ? 1 : 0);
-            dest.writeInt(mIsMetered ? 1 : 0);
             dest.writeString(mReason);
             dest.writeString(mExtraInfo);
         }
@@ -475,7 +447,6 @@
             netInfo.mIsFailover = in.readInt() != 0;
             netInfo.mIsAvailable = in.readInt() != 0;
             netInfo.mIsRoaming = in.readInt() != 0;
-            netInfo.mIsMetered = in.readInt() != 0;
             netInfo.mReason = in.readString();
             netInfo.mExtraInfo = in.readString();
             return netInfo;
diff --git a/core/jni/android_net_NetUtils.cpp b/core/jni/android_net_NetUtils.cpp
index 3e99521..823f1cc 100644
--- a/core/jni/android_net_NetUtils.cpp
+++ b/core/jni/android_net_NetUtils.cpp
@@ -17,7 +17,7 @@
 #define LOG_TAG "NetUtils"
 
 #include "jni.h"
-#include "JNIHelp.h"
+#include <nativehelper/JNIHelp.h>
 #include "NetdClient.h"
 #include <utils/misc.h>
 #include <android_runtime/AndroidRuntime.h>
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 5c4826f..ec83a03 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -40,7 +40,6 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
-import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.database.ContentObserver;
 import android.net.ConnectivityManager;
@@ -52,10 +51,10 @@
 import android.net.INetworkStatsService;
 import android.net.LinkProperties;
 import android.net.LinkProperties.CompareResult;
+import android.net.MatchAllNetworkSpecifier;
 import android.net.Network;
 import android.net.NetworkAgent;
 import android.net.NetworkCapabilities;
-import android.net.MatchAllNetworkSpecifier;
 import android.net.NetworkConfig;
 import android.net.NetworkInfo;
 import android.net.NetworkInfo.DetailedState;
@@ -124,13 +123,12 @@
 import com.android.internal.util.MessageUtils;
 import com.android.internal.util.WakeupMessage;
 import com.android.internal.util.XmlUtils;
-import com.android.server.LocalServices;
 import com.android.server.am.BatteryStatsService;
 import com.android.server.connectivity.DataConnectionStats;
 import com.android.server.connectivity.KeepaliveTracker;
+import com.android.server.connectivity.LingerMonitor;
 import com.android.server.connectivity.MockableSystemProperties;
 import com.android.server.connectivity.Nat464Xlat;
-import com.android.server.connectivity.LingerMonitor;
 import com.android.server.connectivity.NetworkAgentInfo;
 import com.android.server.connectivity.NetworkDiagnostics;
 import com.android.server.connectivity.NetworkMonitor;
@@ -139,8 +137,8 @@
 import com.android.server.connectivity.PacManager;
 import com.android.server.connectivity.PermissionMonitor;
 import com.android.server.connectivity.Tethering;
-import com.android.server.connectivity.tethering.TetheringDependencies;
 import com.android.server.connectivity.Vpn;
+import com.android.server.connectivity.tethering.TetheringDependencies;
 import com.android.server.net.BaseNetworkObserver;
 import com.android.server.net.LockdownVpnTracker;
 import com.android.server.net.NetworkPolicyManagerInternal;
@@ -1036,8 +1034,7 @@
     /**
      * Apply any relevant filters to {@link NetworkState} for the given UID. For
      * example, this may mark the network as {@link DetailedState#BLOCKED} based
-     * on {@link #isNetworkWithLinkPropertiesBlocked}, or
-     * {@link NetworkInfo#isMetered()} based on network policies.
+     * on {@link #isNetworkWithLinkPropertiesBlocked}.
      */
     private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) {
         if (state == null || state.networkInfo == null || state.linkProperties == null) return;
@@ -1048,15 +1045,6 @@
         if (mLockdownTracker != null) {
             mLockdownTracker.augmentNetworkInfo(state.networkInfo);
         }
-
-        // TODO: apply metered state closer to NetworkAgentInfo
-        final long token = Binder.clearCallingIdentity();
-        try {
-            state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state));
-        } catch (RemoteException e) {
-        } finally {
-            Binder.restoreCallingIdentity(token);
-        }
     }
 
     /**
@@ -1326,30 +1314,24 @@
     }
 
     @Override
+    @Deprecated
     public NetworkQuotaInfo getActiveNetworkQuotaInfo() {
-        enforceAccessPermission();
-        final int uid = Binder.getCallingUid();
-        final long token = Binder.clearCallingIdentity();
-        try {
-            final NetworkState state = getUnfilteredActiveNetworkState(uid);
-            if (state.networkInfo != null) {
-                try {
-                    return mPolicyManager.getNetworkQuotaInfo(state);
-                } catch (RemoteException e) {
-                }
-            }
-            return null;
-        } finally {
-            Binder.restoreCallingIdentity(token);
-        }
+        Log.w(TAG, "Shame on UID " + Binder.getCallingUid()
+                + " for calling the hidden API getNetworkQuotaInfo(). Shame!");
+        return new NetworkQuotaInfo();
     }
 
     @Override
     public boolean isActiveNetworkMetered() {
         enforceAccessPermission();
 
-        final NetworkInfo info = getActiveNetworkInfo();
-        return (info != null) ? info.isMetered() : false;
+        final NetworkCapabilities caps = getNetworkCapabilities(getActiveNetwork());
+        if (caps != null) {
+            return !caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED);
+        } else {
+            // Always return the most conservative value
+            return true;
+        }
     }
 
     private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() {
@@ -1510,6 +1492,12 @@
         ConnectivityManager.enforceChangePermission(mContext);
     }
 
+    private void enforceSettingsPermission() {
+        mContext.enforceCallingOrSelfPermission(
+                android.Manifest.permission.NETWORK_SETTINGS,
+                "ConnectivityService");
+    }
+
     private void enforceTetherAccessPermission() {
         mContext.enforceCallingOrSelfPermission(
                 android.Manifest.permission.ACCESS_NETWORK_STATE,
@@ -2759,7 +2747,8 @@
         enforceAccessPermission();
 
         NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);
-        if (nai != null && !nai.networkInfo.isMetered()) {
+        if (nai != null && nai.networkCapabilities
+                .hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)) {
             return ConnectivityManager.MULTIPATH_PREFERENCE_UNMETERED;
         }
 
@@ -2970,12 +2959,16 @@
         return mTethering.getTetheredDhcpRanges();
     }
 
+    @Override
+    public boolean isTetheringSupported(String callerPkg) {
+        ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg);
+        return isTetheringSupported();
+    }
+
     // if ro.tether.denied = true we default to no tethering
     // gservices could set the secure setting to 1 though to enable it on a build where it
     // had previously been turned off.
-    @Override
-    public boolean isTetheringSupported() {
-        enforceTetherAccessPermission();
+    private boolean isTetheringSupported() {
         int defaultVal = encodeBool(!mSystemProperties.get("ro.tether.denied").equals("true"));
         boolean tetherSupported = toBool(Settings.Global.getInt(mContext.getContentResolver(),
                 Settings.Global.TETHER_SUPPORTED, defaultVal));
@@ -3636,6 +3629,21 @@
     }
 
     @Override
+    public boolean isAlwaysOnVpnPackageSupported(int userId, String packageName) {
+        enforceSettingsPermission();
+        enforceCrossUserPermission(userId);
+
+        synchronized (mVpns) {
+            Vpn vpn = mVpns.get(userId);
+            if (vpn == null) {
+                Slog.w(TAG, "User " + userId + " has no Vpn configuration");
+                return false;
+            }
+            return vpn.isAlwaysOnPackageSupported(packageName);
+        }
+    }
+
+    @Override
     public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) {
         enforceConnectivityInternalPermission();
         enforceCrossUserPermission(userId);
@@ -3784,6 +3792,9 @@
     public void setProvisioningNotificationVisible(boolean visible, int networkType,
             String action) {
         enforceConnectivityInternalPermission();
+        if (!ConnectivityManager.isNetworkTypeValid(networkType)) {
+            return;
+        }
         final long ident = Binder.clearCallingIdentity();
         try {
             // Concatenate the range of types onto the range of NetIDs.
@@ -4571,11 +4582,15 @@
      */
     private void updateCapabilities(
             int oldScore, NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) {
-        // Sanity check: a NetworkAgent should not change its static capabilities or parameters.
-        if (nai.everConnected) {
+        // Once a NetworkAgent is connected, complain if some immutable capabilities are removed.
+        if (nai.everConnected && !nai.networkCapabilities.satisfiedByImmutableNetworkCapabilities(
+                networkCapabilities)) {
+            // TODO: consider not complaining when a network agent degrade its capabilities if this
+            // does not cause any request (that is not a listen) currently matching that agent to
+            // stop being matched by the updated agent.
             String diff = nai.networkCapabilities.describeImmutableDifferences(networkCapabilities);
             if (!TextUtils.isEmpty(diff)) {
-                Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities:" + diff);
+                Slog.wtf(TAG, "BUG: " + nai + " lost immutable capabilities:" + diff);
             }
         }
 
@@ -4944,12 +4959,12 @@
         if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) {
             Slog.wtf(TAG, String.format(
                     "BUG: %s changed requestable capabilities during rematch: %s -> %s",
-                    nc, newNetwork.networkCapabilities));
+                    newNetwork.name(), nc, newNetwork.networkCapabilities));
         }
         if (newNetwork.getCurrentScore() != score) {
             Slog.wtf(TAG, String.format(
                     "BUG: %s changed score during rematch: %d -> %d",
-                    score, newNetwork.getCurrentScore()));
+                   newNetwork.name(), score, newNetwork.getCurrentScore()));
         }
 
         // Second pass: process all listens.
@@ -5392,6 +5407,7 @@
 
     @Override
     public String getCaptivePortalServerUrl() {
+        enforceConnectivityInternalPermission();
         return NetworkMonitor.getCaptivePortalServerHttpUrl(mContext);
     }
 
diff --git a/core/tests/coretests/src/android/net/IpPrefixTest.java b/tests/net/java/android/net/IpPrefixTest.java
similarity index 93%
rename from core/tests/coretests/src/android/net/IpPrefixTest.java
rename to tests/net/java/android/net/IpPrefixTest.java
index 4f2387d..b5b2c07 100644
--- a/core/tests/coretests/src/android/net/IpPrefixTest.java
+++ b/tests/net/java/android/net/IpPrefixTest.java
@@ -16,18 +16,27 @@
 
 package android.net;
 
-import android.net.IpPrefix;
-import android.os.Parcel;
-import android.test.suitebuilder.annotation.SmallTest;
-import java.net.InetAddress;
-import java.util.Random;
-import junit.framework.TestCase;
-
-import static android.test.MoreAsserts.assertNotEqual;
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
 
-public class IpPrefixTest extends TestCase {
+import android.os.Parcel;
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
+
+import java.net.InetAddress;
+import java.util.Random;
+
+import org.junit.runner.RunWith;
+import org.junit.Test;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class IpPrefixTest {
 
     private static InetAddress Address(String addr) {
         return InetAddress.parseNumericAddress(addr);
@@ -42,7 +51,7 @@
         (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0xa0
     };
 
-    @SmallTest
+    @Test
     public void testConstructor() {
         IpPrefix p;
         try {
@@ -103,6 +112,7 @@
         } catch(IllegalArgumentException expected) {}
     }
 
+    @Test
     public void testTruncation() {
         IpPrefix p;
 
@@ -170,7 +180,7 @@
         assertFalse(o2.equals(o1));
     }
 
-    @SmallTest
+    @Test
     public void testEquals() {
         IpPrefix p1, p2;
 
@@ -212,7 +222,7 @@
         assertAreNotEqual(p1, p2);
     }
 
-    @SmallTest
+    @Test
     public void testContains() {
         IpPrefix p = new IpPrefix("2001:db8:f00::ace:d00d/127");
         assertTrue(p.contains(Address("2001:db8:f00::ace:d00c")));
@@ -240,7 +250,7 @@
         assertFalse(ipv4Default.contains(Address("2001:db8::f00")));
     }
 
-    @SmallTest
+    @Test
     public void testHashCode() {
         IpPrefix p = new IpPrefix(new byte[4], 0);
         Random random = new Random();
@@ -261,12 +271,12 @@
               assertEquals(p.hashCode(), oldP.hashCode());
             }
             if (p.hashCode() != oldP.hashCode()) {
-              assertNotEqual(p, oldP);
+              assertNotEquals(p, oldP);
             }
         }
     }
 
-    @SmallTest
+    @Test
     public void testHashCodeIsNotConstant() {
         IpPrefix[] prefixes = {
             new IpPrefix("2001:db8:f00::ace:d00d/127"),
@@ -276,12 +286,12 @@
         };
         for (int i = 0; i < prefixes.length; i++) {
           for (int j = i + 1; j < prefixes.length; j++) {
-            assertNotEqual(prefixes[i].hashCode(), prefixes[j].hashCode());
+            assertNotEquals(prefixes[i].hashCode(), prefixes[j].hashCode());
           }
         }
     }
 
-    @SmallTest
+    @Test
     public void testMappedAddressesAreBroken() {
         // 192.0.2.0/24 != ::ffff:c000:0204/120, but because we use InetAddress,
         // we are unable to comprehend that.
@@ -318,13 +328,16 @@
       assertEquals(p, p2);
     }
 
+    @Test
     public void testParceling() {
         IpPrefix p;
 
         p = new IpPrefix("2001:4860:db8::/64");
         assertParcelingIsLossless(p);
+        assertTrue(p.isIPv6());
 
         p = new IpPrefix("192.0.2.0/25");
         assertParcelingIsLossless(p);
+        assertTrue(p.isIPv4());
     }
 }
diff --git a/core/tests/coretests/src/android/net/LinkAddressTest.java b/tests/net/java/android/net/LinkAddressTest.java
similarity index 91%
rename from core/tests/coretests/src/android/net/LinkAddressTest.java
rename to tests/net/java/android/net/LinkAddressTest.java
index adf8d95..c1ad946 100644
--- a/core/tests/coretests/src/android/net/LinkAddressTest.java
+++ b/tests/net/java/android/net/LinkAddressTest.java
@@ -16,6 +16,23 @@
 
 package android.net;
 
+import static android.system.OsConstants.IFA_F_DADFAILED;
+import static android.system.OsConstants.IFA_F_DEPRECATED;
+import static android.system.OsConstants.IFA_F_OPTIMISTIC;
+import static android.system.OsConstants.IFA_F_PERMANENT;
+import static android.system.OsConstants.IFA_F_TEMPORARY;
+import static android.system.OsConstants.IFA_F_TENTATIVE;
+import static android.system.OsConstants.RT_SCOPE_HOST;
+import static android.system.OsConstants.RT_SCOPE_LINK;
+import static android.system.OsConstants.RT_SCOPE_SITE;
+import static android.system.OsConstants.RT_SCOPE_UNIVERSE;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
 import java.net.Inet4Address;
 import java.net.Inet6Address;
 import java.net.InetAddress;
@@ -27,44 +44,35 @@
 import java.util.Comparator;
 import java.util.List;
 
-import android.net.LinkAddress;
 import android.os.Parcel;
-import android.test.AndroidTestCase;
-import static android.test.MoreAsserts.assertNotEqual;
-import android.test.suitebuilder.annotation.SmallTest;
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
 
-import static android.system.OsConstants.IFA_F_DADFAILED;
-import static android.system.OsConstants.IFA_F_DEPRECATED;
-import static android.system.OsConstants.IFA_F_OPTIMISTIC;
-import static android.system.OsConstants.IFA_F_PERMANENT;
-import static android.system.OsConstants.IFA_F_TEMPORARY;
-import static android.system.OsConstants.IFA_F_TENTATIVE;
-import static android.system.OsConstants.RT_SCOPE_HOST;
-import static android.system.OsConstants.RT_SCOPE_LINK;
-import static android.system.OsConstants.RT_SCOPE_SITE;
-import static android.system.OsConstants.RT_SCOPE_UNIVERSE;
+import org.junit.runner.RunWith;
+import org.junit.Test;
 
-/**
- * Tests for {@link LinkAddress}.
- */
-public class LinkAddressTest extends AndroidTestCase {
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class LinkAddressTest {
 
     private static final String V4 = "192.0.2.1";
     private static final String V6 = "2001:db8::1";
     private static final InetAddress V4_ADDRESS = NetworkUtils.numericToInetAddress(V4);
     private static final InetAddress V6_ADDRESS = NetworkUtils.numericToInetAddress(V6);
 
+    @Test
     public void testConstants() {
         // RT_SCOPE_UNIVERSE = 0, but all the other constants should be nonzero.
-        assertNotEqual(0, RT_SCOPE_HOST);
-        assertNotEqual(0, RT_SCOPE_LINK);
-        assertNotEqual(0, RT_SCOPE_SITE);
+        assertNotEquals(0, RT_SCOPE_HOST);
+        assertNotEquals(0, RT_SCOPE_LINK);
+        assertNotEquals(0, RT_SCOPE_SITE);
 
-        assertNotEqual(0, IFA_F_DEPRECATED);
-        assertNotEqual(0, IFA_F_PERMANENT);
-        assertNotEqual(0, IFA_F_TENTATIVE);
+        assertNotEquals(0, IFA_F_DEPRECATED);
+        assertNotEquals(0, IFA_F_PERMANENT);
+        assertNotEquals(0, IFA_F_TENTATIVE);
     }
 
+    @Test
     public void testConstructors() throws SocketException {
         LinkAddress address;
 
@@ -74,12 +82,14 @@
         assertEquals(25, address.getPrefixLength());
         assertEquals(0, address.getFlags());
         assertEquals(RT_SCOPE_UNIVERSE, address.getScope());
+        assertTrue(address.isIPv4());
 
         address = new LinkAddress(V6_ADDRESS, 127);
         assertEquals(V6_ADDRESS, address.getAddress());
         assertEquals(127, address.getPrefixLength());
         assertEquals(0, address.getFlags());
         assertEquals(RT_SCOPE_UNIVERSE, address.getScope());
+        assertTrue(address.isIPv6());
 
         // Nonsensical flags/scopes or combinations thereof are acceptable.
         address = new LinkAddress(V6 + "/64", IFA_F_DEPRECATED | IFA_F_PERMANENT, RT_SCOPE_LINK);
@@ -87,12 +97,14 @@
         assertEquals(64, address.getPrefixLength());
         assertEquals(IFA_F_DEPRECATED | IFA_F_PERMANENT, address.getFlags());
         assertEquals(RT_SCOPE_LINK, address.getScope());
+        assertTrue(address.isIPv6());
 
         address = new LinkAddress(V4 + "/23", 123, 456);
         assertEquals(V4_ADDRESS, address.getAddress());
         assertEquals(23, address.getPrefixLength());
         assertEquals(123, address.getFlags());
         assertEquals(456, address.getScope());
+        assertTrue(address.isIPv4());
 
         // InterfaceAddress doesn't have a constructor. Fetch some from an interface.
         List<InterfaceAddress> addrs = NetworkInterface.getByName("lo").getInterfaceAddresses();
@@ -174,6 +186,7 @@
         } catch(IllegalArgumentException expected) {}
     }
 
+    @Test
     public void testAddressScopes() {
         assertEquals(RT_SCOPE_HOST, new LinkAddress("::/128").getScope());
         assertEquals(RT_SCOPE_HOST, new LinkAddress("0.0.0.0/32").getScope());
@@ -216,6 +229,7 @@
         assertFalse(l2 + " unexpectedly equal to " + l1, l2.equals(l1));
     }
 
+    @Test
     public void testEqualsAndSameAddressAs() {
         LinkAddress l1, l2, l3;
 
@@ -293,26 +307,17 @@
         assertIsSameAddressAs(l1, l2);
     }
 
+    @Test
     public void testHashCode() {
-        LinkAddress l;
+        LinkAddress l1, l2;
 
-        l = new LinkAddress(V4_ADDRESS, 23);
-        assertEquals(-982787, l.hashCode());
+        l1 = new LinkAddress(V4_ADDRESS, 23);
+        l2 = new LinkAddress(V4_ADDRESS, 23, 0, RT_SCOPE_HOST);
+        assertNotEquals(l1.hashCode(), l2.hashCode());
 
-        l = new LinkAddress(V4_ADDRESS, 23, 0, RT_SCOPE_HOST);
-        assertEquals(-971865, l.hashCode());
-
-        l = new LinkAddress(V4_ADDRESS, 27);
-        assertEquals(-982743, l.hashCode());
-
-        l = new LinkAddress(V6_ADDRESS, 64);
-        assertEquals(1076522926, l.hashCode());
-
-        l = new LinkAddress(V6_ADDRESS, 128);
-        assertEquals(1076523630, l.hashCode());
-
-        l = new LinkAddress(V6_ADDRESS, 128, IFA_F_TENTATIVE, RT_SCOPE_UNIVERSE);
-        assertEquals(1076524846, l.hashCode());
+        l1 = new LinkAddress(V6_ADDRESS, 128);
+        l2 = new LinkAddress(V6_ADDRESS, 128, IFA_F_TENTATIVE, RT_SCOPE_UNIVERSE);
+        assertNotEquals(l1.hashCode(), l2.hashCode());
     }
 
     private LinkAddress passThroughParcel(LinkAddress l) {
@@ -334,6 +339,7 @@
       assertEquals(l, l2);
     }
 
+    @Test
     public void testParceling() {
         LinkAddress l;
 
@@ -352,6 +358,7 @@
         assertFalse(msg, l.isGlobalPreferred());
     }
 
+    @Test
     public void testIsGlobalPreferred() {
         LinkAddress l;
 
diff --git a/tests/net/java/android/net/nsd/NsdManagerTest.java b/tests/net/java/android/net/nsd/NsdManagerTest.java
index adf6998..f77608f 100644
--- a/tests/net/java/android/net/nsd/NsdManagerTest.java
+++ b/tests/net/java/android/net/nsd/NsdManagerTest.java
@@ -349,7 +349,6 @@
                 chan.connect(mContext, this, msg.replyTo);
                 chan.sendMessage(AsyncChannel.CMD_CHANNEL_FULLY_CONNECTED);
             }
-
         }
 
         public static MockServiceHandler create(Context context) {
diff --git a/tests/net/java/com/android/server/ConnectivityServiceTest.java b/tests/net/java/com/android/server/ConnectivityServiceTest.java
index 198ddc6..f6481cf 100644
--- a/tests/net/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/net/java/com/android/server/ConnectivityServiceTest.java
@@ -19,10 +19,13 @@
 import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
 import static android.net.ConnectivityManager.TYPE_ETHERNET;
 import static android.net.ConnectivityManager.TYPE_MOBILE;
+import static android.net.ConnectivityManager.TYPE_NONE;
 import static android.net.ConnectivityManager.TYPE_WIFI;
 import static android.net.ConnectivityManager.getNetworkTypeName;
 import static android.net.NetworkCapabilities.*;
 
+import static com.android.internal.util.TestUtils.waitForIdleHandler;
+
 import static org.mockito.Mockito.anyBoolean;
 import static org.mockito.Mockito.anyInt;
 import static org.mockito.Mockito.eq;
@@ -112,6 +115,7 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.BooleanSupplier;
+import java.util.function.Predicate;
 
 /**
  * Tests for {@link ConnectivityService}.
@@ -212,20 +216,8 @@
         }
     }
 
-    /**
-     * Block until the given handler becomes idle, or until timeoutMs has passed.
-     */
-    private static void waitForIdleHandler(HandlerThread handlerThread, int timeoutMs) {
-        final ConditionVariable cv = new ConditionVariable();
-        final Handler handler = new Handler(handlerThread.getLooper());
-        handler.post(() -> cv.open());
-        if (!cv.block(timeoutMs)) {
-            fail("HandlerThread " + handlerThread.getName() +
-                    " did not become idle after " + timeoutMs + " ms");
-        }
-    }
-
-    public void waitForIdle(int timeoutMs) {
+    public void waitForIdle(int timeoutMsAsInt) {
+        long timeoutMs = timeoutMsAsInt;
         waitForIdleHandler(mService.mHandlerThread, timeoutMs);
         waitForIdle(mCellNetworkAgent, timeoutMs);
         waitForIdle(mWiFiNetworkAgent, timeoutMs);
@@ -233,7 +225,7 @@
         waitForIdleHandler(mService.mHandlerThread, timeoutMs);
     }
 
-    public void waitForIdle(MockNetworkAgent agent, int timeoutMs) {
+    public void waitForIdle(MockNetworkAgent agent, long timeoutMs) {
         if (agent == null) {
             return;
         }
@@ -327,6 +319,9 @@
                 case TRANSPORT_CELLULAR:
                     mScore = 50;
                     break;
+                case TRANSPORT_WIFI_AWARE:
+                    mScore = 20;
+                    break;
                 default:
                     throw new UnsupportedOperationException("unimplemented network type");
             }
@@ -408,6 +403,15 @@
          * @param validated Indicate if network should pretend to be validated.
          */
         public void connect(boolean validated) {
+            connect(validated, true);
+        }
+
+        /**
+         * Transition this NetworkAgent to CONNECTED state.
+         * @param validated Indicate if network should pretend to be validated.
+         * @param hasInternet Indicate if network should pretend to have NET_CAPABILITY_INTERNET.
+         */
+        public void connect(boolean validated, boolean hasInternet) {
             assertEquals("MockNetworkAgents can only be connected once",
                     mNetworkInfo.getDetailedState(), DetailedState.IDLE);
             assertFalse(mNetworkCapabilities.hasCapability(NET_CAPABILITY_INTERNET));
@@ -430,7 +434,9 @@
                 };
                 mCm.registerNetworkCallback(request, callback);
             }
-            addCapability(NET_CAPABILITY_INTERNET);
+            if (hasInternet) {
+                addCapability(NET_CAPABILITY_INTERNET);
+            }
 
             connectWithoutInternet();
 
@@ -784,7 +790,10 @@
      * Fails if TIMEOUT_MS goes by before {@code conditionVariable} opens.
      */
     static private void waitFor(ConditionVariable conditionVariable) {
-        assertTrue(conditionVariable.block(TIMEOUT_MS));
+        if (conditionVariable.block(TIMEOUT_MS)) {
+            return;
+        }
+        fail("ConditionVariable was blocked for more than " + TIMEOUT_MS + "ms");
     }
 
     @Override
@@ -842,7 +851,7 @@
             case TRANSPORT_CELLULAR:
                 return TYPE_MOBILE;
             default:
-                throw new IllegalStateException("Unknown transport " + transport);
+                return TYPE_NONE;
         }
     }
 
@@ -853,6 +862,9 @@
         // Test getActiveNetwork()
         assertNotNull(mCm.getActiveNetwork());
         assertEquals(mCm.getActiveNetwork(), mCm.getActiveNetworkForUid(Process.myUid()));
+        if (!NetworkCapabilities.isValidTransport(transport)) {
+            throw new IllegalStateException("Unknown transport " + transport);
+        }
         switch (transport) {
             case TRANSPORT_WIFI:
                 assertEquals(mCm.getActiveNetwork(), mWiFiNetworkAgent.getNetwork());
@@ -861,7 +873,7 @@
                 assertEquals(mCm.getActiveNetwork(), mCellNetworkAgent.getNetwork());
                 break;
             default:
-                throw new IllegalStateException("Unknown transport" + transport);
+                break;
         }
         // Test getNetworkInfo(Network)
         assertNotNull(mCm.getNetworkInfo(mCm.getActiveNetwork()));
@@ -873,13 +885,14 @@
     }
 
     private void verifyNoNetwork() {
+        waitForIdle();
         // Test getActiveNetworkInfo()
         assertNull(mCm.getActiveNetworkInfo());
         // Test getActiveNetwork()
         assertNull(mCm.getActiveNetwork());
         assertNull(mCm.getActiveNetworkForUid(Process.myUid()));
         // Test getAllNetworks()
-        assertEquals(0, mCm.getAllNetworks().length);
+        assertEmpty(mCm.getAllNetworks());
     }
 
     /**
@@ -920,7 +933,7 @@
         mCellNetworkAgent.connect(true);
         waitFor(cv);
         verifyActiveNetwork(TRANSPORT_CELLULAR);
-        assertEquals(2, mCm.getAllNetworks().length);
+        assertLength(2, mCm.getAllNetworks());
         assertTrue(mCm.getAllNetworks()[0].equals(mCm.getActiveNetwork()) ||
                 mCm.getAllNetworks()[1].equals(mCm.getActiveNetwork()));
         assertTrue(mCm.getAllNetworks()[0].equals(mWiFiNetworkAgent.getNetwork()) ||
@@ -930,7 +943,7 @@
         mWiFiNetworkAgent.connect(true);
         waitFor(cv);
         verifyActiveNetwork(TRANSPORT_WIFI);
-        assertEquals(2, mCm.getAllNetworks().length);
+        assertLength(2, mCm.getAllNetworks());
         assertTrue(mCm.getAllNetworks()[0].equals(mCm.getActiveNetwork()) ||
                 mCm.getAllNetworks()[1].equals(mCm.getActiveNetwork()));
         assertTrue(mCm.getAllNetworks()[0].equals(mCellNetworkAgent.getNetwork()) ||
@@ -938,9 +951,9 @@
         // Test cellular linger timeout.
         waitFor(mCellNetworkAgent.getDisconnectedCV());
         waitForIdle();
-        assertEquals(1, mCm.getAllNetworks().length);
+        assertLength(1, mCm.getAllNetworks());
         verifyActiveNetwork(TRANSPORT_WIFI);
-        assertEquals(1, mCm.getAllNetworks().length);
+        assertLength(1, mCm.getAllNetworks());
         assertEquals(mCm.getAllNetworks()[0], mCm.getActiveNetwork());
         // Test WiFi disconnect.
         cv = waitForConnectivityBroadcasts(1);
@@ -1281,7 +1294,26 @@
             return expectCallback(state, agent, TIMEOUT_MS);
         }
 
-        void expectAvailableCallbacks(MockNetworkAgent agent, boolean expectSuspended, int timeoutMs) {
+        CallbackInfo expectCallbackLike(Predicate<CallbackInfo> fn) {
+            return expectCallbackLike(fn, TIMEOUT_MS);
+        }
+
+        CallbackInfo expectCallbackLike(Predicate<CallbackInfo> fn, int timeoutMs) {
+            int timeLeft = timeoutMs;
+            while (timeLeft > 0) {
+                long start = SystemClock.elapsedRealtime();
+                CallbackInfo info = nextCallback(timeLeft);
+                if (fn.test(info)) {
+                    return info;
+                }
+                timeLeft -= (SystemClock.elapsedRealtime() - start);
+            }
+            fail("Did not receive expected callback after " + timeoutMs + "ms");
+            return null;
+        }
+
+        void expectAvailableCallbacks(
+                MockNetworkAgent agent, boolean expectSuspended, int timeoutMs) {
             expectCallback(CallbackState.AVAILABLE, agent, timeoutMs);
             if (expectSuspended) {
                 expectCallback(CallbackState.SUSPENDED, agent, timeoutMs);
@@ -1838,26 +1870,18 @@
     @SmallTest
     public void testNoMutableNetworkRequests() throws Exception {
         PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, new Intent("a"), 0);
-        NetworkRequest.Builder builder = new NetworkRequest.Builder();
-        builder.addCapability(NET_CAPABILITY_VALIDATED);
-        try {
-            mCm.requestNetwork(builder.build(), new NetworkCallback());
-            fail();
-        } catch (IllegalArgumentException expected) {}
-        try {
-            mCm.requestNetwork(builder.build(), pendingIntent);
-            fail();
-        } catch (IllegalArgumentException expected) {}
-        builder = new NetworkRequest.Builder();
-        builder.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL);
-        try {
-            mCm.requestNetwork(builder.build(), new NetworkCallback());
-            fail();
-        } catch (IllegalArgumentException expected) {}
-        try {
-            mCm.requestNetwork(builder.build(), pendingIntent);
-            fail();
-        } catch (IllegalArgumentException expected) {}
+        NetworkRequest request1 = new NetworkRequest.Builder()
+                .addCapability(NET_CAPABILITY_VALIDATED)
+                .build();
+        NetworkRequest request2 = new NetworkRequest.Builder()
+                .addCapability(NET_CAPABILITY_CAPTIVE_PORTAL)
+                .build();
+
+        Class<IllegalArgumentException> expected = IllegalArgumentException.class;
+        assertException(() -> { mCm.requestNetwork(request1, new NetworkCallback()); }, expected);
+        assertException(() -> { mCm.requestNetwork(request1, pendingIntent); }, expected);
+        assertException(() -> { mCm.requestNetwork(request2, new NetworkCallback()); }, expected);
+        assertException(() -> { mCm.requestNetwork(request2, pendingIntent); }, expected);
     }
 
     @SmallTest
@@ -1869,7 +1893,7 @@
         mCellNetworkAgent.connectWithoutInternet();
         waitFor(cv);
         waitForIdle();
-        assertEquals(0, mCm.getAllNetworks().length);
+        assertEmpty(mCm.getAllNetworks());
         verifyNoNetwork();
 
         // Test bringing up validated WiFi.
@@ -2543,7 +2567,7 @@
         assertTrue(testFactory.getMyStartRequested());
 
         // Bring up cell data and check that the factory stops looking.
-        assertEquals(1, mCm.getAllNetworks().length);
+        assertLength(1, mCm.getAllNetworks());
         mCellNetworkAgent = new MockNetworkAgent(TRANSPORT_CELLULAR);
         testFactory.expectAddRequests(2);  // Because the cell request changes score twice.
         mCellNetworkAgent.connect(true);
@@ -2554,7 +2578,7 @@
         // Check that cell data stays up.
         waitForIdle();
         verifyActiveNetwork(TRANSPORT_WIFI);
-        assertEquals(2, mCm.getAllNetworks().length);
+        assertLength(2, mCm.getAllNetworks());
 
         // Turn off mobile data always on and expect the request to disappear...
         testFactory.expectRemoveRequests(1);
@@ -2563,7 +2587,7 @@
 
         // ...  and cell data to be torn down.
         cellNetworkCallback.expectCallback(CallbackState.LOST, mCellNetworkAgent);
-        assertEquals(1, mCm.getAllNetworks().length);
+        assertLength(1, mCm.getAllNetworks());
 
         testFactory.unregister();
         mCm.unregisterNetworkCallback(cellNetworkCallback);
@@ -2784,19 +2808,17 @@
         NetworkRequest nr = new NetworkRequest.Builder().addTransportType(
                 NetworkCapabilities.TRANSPORT_WIFI).build();
         final TestNetworkCallback networkCallback = new TestNetworkCallback();
-        final int requestTimeoutMs = 100;
+        final int requestTimeoutMs = 50;
         mCm.requestNetwork(nr, networkCallback, requestTimeoutMs);
 
         mWiFiNetworkAgent = new MockNetworkAgent(TRANSPORT_WIFI);
         mWiFiNetworkAgent.connect(false);
-        final int assertTimeoutMs = 150;
+        final int assertTimeoutMs = 100;
         networkCallback.expectAvailableCallbacks(mWiFiNetworkAgent, false, assertTimeoutMs);
-        sleepFor(20);
         mWiFiNetworkAgent.disconnect();
         networkCallback.expectCallback(CallbackState.LOST, mWiFiNetworkAgent);
 
-        // pass timeout and validate that UNAVAILABLE is not called
-        sleepFor(100);
+        // Validate that UNAVAILABLE is not called
         networkCallback.assertNoCallback();
     }
 
@@ -2823,24 +2845,20 @@
     }
 
     /**
-     * Validate that when a network request is unregistered (cancelled) the time-out for that
-     * request doesn't trigger the onUnavailable() callback.
+     * Validate that when a network request is unregistered (cancelled), no posterior event can
+     * trigger the callback.
      */
     @SmallTest
-    public void testTimedoutAfterUnregisteredNetworkRequest() {
+    public void testNoCallbackAfterUnregisteredNetworkRequest() {
         NetworkRequest nr = new NetworkRequest.Builder().addTransportType(
                 NetworkCapabilities.TRANSPORT_WIFI).build();
         final TestNetworkCallback networkCallback = new TestNetworkCallback();
         final int timeoutMs = 10;
+
         mCm.requestNetwork(nr, networkCallback, timeoutMs);
-
-        // remove request
         mCm.unregisterNetworkCallback(networkCallback);
-
-        // pass timeout and validate that no callbacks
-        // Note: doesn't validate that nothing called from CS since even if called the CM already
-        // unregisters the callback and won't pass it through!
-        sleepFor(15);
+        // Regardless of the timeout, unregistering the callback in ConnectivityManager ensures
+        // that this callback will not be called.
         networkCallback.assertNoCallback();
 
         // create a network satisfying request - validate that request not triggered
@@ -3259,12 +3277,87 @@
         }
     }
 
-    /* test utilities */
-    // TODO: eliminate all usages of sleepFor and replace by proper timeouts/waitForIdle.
-    static private void sleepFor(int ms) {
+    @SmallTest
+    public void testNetworkInfoOfTypeNone() {
+        ConditionVariable broadcastCV = waitForConnectivityBroadcasts(1);
+
+        verifyNoNetwork();
+        MockNetworkAgent wifiAware = new MockNetworkAgent(TRANSPORT_WIFI_AWARE);
+        assertNull(mCm.getActiveNetworkInfo());
+
+        Network[] allNetworks = mCm.getAllNetworks();
+        assertLength(1, allNetworks);
+        Network network = allNetworks[0];
+        NetworkCapabilities capabilities = mCm.getNetworkCapabilities(network);
+        assertTrue(capabilities.hasTransport(TRANSPORT_WIFI_AWARE));
+
+        final NetworkRequest request =
+                new NetworkRequest.Builder().addTransportType(TRANSPORT_WIFI_AWARE).build();
+        final TestNetworkCallback callback = new TestNetworkCallback();
+        mCm.registerNetworkCallback(request, callback);
+
+        // Bring up wifi aware network.
+        wifiAware.connect(false, false);
+        callback.expectAvailableCallbacks(wifiAware);
+
+        assertNull(mCm.getActiveNetworkInfo());
+        assertNull(mCm.getActiveNetwork());
+        // TODO: getAllNetworkInfo is dirty and returns a non-empty array right from the start
+        // of this test. Fix it and uncomment the assert below.
+        //assertEmpty(mCm.getAllNetworkInfo());
+
+        // Disconnect wifi aware network.
+        wifiAware.disconnect();
+        callback.expectCallbackLike((info) -> info.state == CallbackState.LOST, TIMEOUT_MS);
+        mCm.unregisterNetworkCallback(callback);
+
+        verifyNoNetwork();
+        if (broadcastCV.block(10)) {
+            fail("expected no broadcast, but got CONNECTIVITY_ACTION broadcast");
+        }
+    }
+
+    @SmallTest
+    public void testDeprecatedAndUnsupportedOperations() throws Exception {
+        final int TYPE_NONE = ConnectivityManager.TYPE_NONE;
+        assertNull(mCm.getNetworkInfo(TYPE_NONE));
+        assertNull(mCm.getNetworkForType(TYPE_NONE));
+        assertNull(mCm.getLinkProperties(TYPE_NONE));
+        assertFalse(mCm.isNetworkSupported(TYPE_NONE));
+
+        assertException(() -> { mCm.networkCapabilitiesForType(TYPE_NONE); },
+                IllegalArgumentException.class);
+
+        Class<UnsupportedOperationException> unsupported = UnsupportedOperationException.class;
+        assertException(() -> { mCm.startUsingNetworkFeature(TYPE_WIFI, ""); }, unsupported);
+        assertException(() -> { mCm.stopUsingNetworkFeature(TYPE_WIFI, ""); }, unsupported);
+        // TODO: let test context have configuration application target sdk version
+        // and test that pre-M requesting for TYPE_NONE sends back APN_REQUEST_FAILED
+        assertException(() -> { mCm.startUsingNetworkFeature(TYPE_NONE, ""); }, unsupported);
+        assertException(() -> { mCm.stopUsingNetworkFeature(TYPE_NONE, ""); }, unsupported);
+        assertException(() -> { mCm.requestRouteToHostAddress(TYPE_NONE, null); }, unsupported);
+    }
+
+    private static <T> void assertEmpty(T[] ts) {
+        int length = ts.length;
+        assertEquals("expected empty array, but length was " + length, 0, length);
+    }
+
+    private static <T> void assertLength(int expected, T[] got) {
+        int length = got.length;
+        assertEquals(String.format("expected array of length %s, but length was %s for %s",
+                expected, length, Arrays.toString(got)), expected, length);
+    }
+
+    private static <T> void assertException(Runnable block, Class<T> expected) {
         try {
-            Thread.sleep(ms);
-        } catch (InterruptedException e) {
+            block.run();
+            fail("Expected exception of type " + expected);
+        } catch (Exception got) {
+            if (!got.getClass().equals(expected)) {
+                fail("Expected exception of type " + expected + " but got " + got);
+            }
+            return;
         }
     }
 }
diff --git a/tests/net/java/com/android/server/connectivity/IpConnectivityEventBuilderTest.java b/tests/net/java/com/android/server/connectivity/IpConnectivityEventBuilderTest.java
index d11565a..eff04ab 100644
--- a/tests/net/java/com/android/server/connectivity/IpConnectivityEventBuilderTest.java
+++ b/tests/net/java/com/android/server/connectivity/IpConnectivityEventBuilderTest.java
@@ -201,9 +201,14 @@
                 "  time_ms: 1",
                 "  transports: 0",
                 "  default_network_event <",
+                "    default_network_duration_ms: 0",
+                "    final_score: 0",
+                "    initial_score: 0",
+                "    ip_support: 0",
                 "    network_id <",
                 "      network_id: 102",
                 "    >",
+                "    no_default_network_duration_ms: 0",
                 "    previous_network_id <",
                 "      network_id: 101",
                 "    >",
@@ -442,6 +447,8 @@
                 "    program_updates_all: 7",
                 "    program_updates_allowing_multicast: 3",
                 "    received_ras: 10",
+                "    total_packet_dropped: 0",
+                "    total_packet_processed: 0",
                 "    zero_lifetime_ras: 1",
                 "  >",
                 ">",
diff --git a/tests/net/java/com/android/server/connectivity/IpConnectivityMetricsTest.java b/tests/net/java/com/android/server/connectivity/IpConnectivityMetricsTest.java
index e01469b..cc18b7f 100644
--- a/tests/net/java/com/android/server/connectivity/IpConnectivityMetricsTest.java
+++ b/tests/net/java/com/android/server/connectivity/IpConnectivityMetricsTest.java
@@ -256,9 +256,14 @@
                 "  time_ms: 300",
                 "  transports: 0",
                 "  default_network_event <",
+                "    default_network_duration_ms: 0",
+                "    final_score: 0",
+                "    initial_score: 0",
+                "    ip_support: 0",
                 "    network_id <",
                 "      network_id: 102",
                 "    >",
+                "    no_default_network_duration_ms: 0",
                 "    previous_network_id <",
                 "      network_id: 101",
                 "    >",
@@ -308,6 +313,8 @@
                 "    program_updates_all: 7",
                 "    program_updates_allowing_multicast: 3",
                 "    received_ras: 10",
+                "    total_packet_dropped: 0",
+                "    total_packet_processed: 0",
                 "    zero_lifetime_ras: 1",
                 "  >",
                 ">",
@@ -367,6 +374,10 @@
                 "    event_types: 1",
                 "    event_types: 1",
                 "    event_types: 2",
+                "    getaddrinfo_error_count: 0",
+                "    getaddrinfo_query_count: 0",
+                "    gethostbyname_error_count: 0",
+                "    gethostbyname_query_count: 0",
                 "    latencies_ms: 3456",
                 "    latencies_ms: 45",
                 "    latencies_ms: 638",
@@ -384,6 +395,10 @@
                 "  dns_lookup_batch <",
                 "    event_types: 1",
                 "    event_types: 2",
+                "    getaddrinfo_error_count: 0",
+                "    getaddrinfo_query_count: 0",
+                "    gethostbyname_error_count: 0",
+                "    gethostbyname_query_count: 0",
                 "    latencies_ms: 56",
                 "    latencies_ms: 34",
                 "    return_codes: 0",
diff --git a/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java b/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java
index f98ab3d..46f395e 100644
--- a/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java
+++ b/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java
@@ -111,6 +111,10 @@
                 "    event_types: 1",
                 "    event_types: 2",
                 "    event_types: 2",
+                "    getaddrinfo_error_count: 0",
+                "    getaddrinfo_query_count: 0",
+                "    gethostbyname_error_count: 0",
+                "    gethostbyname_query_count: 0",
                 "    latencies_ms: 3456",
                 "    latencies_ms: 267",
                 "    latencies_ms: 1230",
@@ -142,6 +146,10 @@
                 "    event_types: 2",
                 "    event_types: 1",
                 "    event_types: 1",
+                "    getaddrinfo_error_count: 0",
+                "    getaddrinfo_query_count: 0",
+                "    gethostbyname_error_count: 0",
+                "    gethostbyname_query_count: 0",
                 "    latencies_ms: 56",
                 "    latencies_ms: 78",
                 "    latencies_ms: 14",
diff --git a/tests/net/java/com/android/server/connectivity/VpnTest.java b/tests/net/java/com/android/server/connectivity/VpnTest.java
index 506d9e5..296cb76 100644
--- a/tests/net/java/com/android/server/connectivity/VpnTest.java
+++ b/tests/net/java/com/android/server/connectivity/VpnTest.java
@@ -27,13 +27,16 @@
 import android.app.AppOpsManager;
 import android.app.NotificationManager;
 import android.content.Context;
-import android.content.Intent;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.pm.ServiceInfo;
 import android.content.pm.UserInfo;
 import android.net.NetworkInfo.DetailedState;
 import android.net.UidRange;
-import android.os.Build;
+import android.net.VpnService;
+import android.os.Build.VERSION_CODES;
+import android.os.Bundle;
 import android.os.INetworkManagementService;
 import android.os.Looper;
 import android.os.UserHandle;
@@ -45,22 +48,22 @@
 
 import com.android.internal.net.VpnConfig;
 
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Map;
-import java.util.Set;
-
 import org.mockito.Answers;
-import org.mockito.ArgumentCaptor;
 import org.mockito.InOrder;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Map;
+import java.util.Set;
+
 /**
  * Tests for {@link Vpn}.
  *
  * Build, install and run with:
- *  runtest --path src/com/android/server/connectivity/VpnTest.java
+ *  runtest --path java/com/android/server/connectivity/VpnTest.java
  */
 public class VpnTest extends AndroidTestCase {
     private static final String TAG = "VpnTest";
@@ -116,7 +119,7 @@
 
         // Used by {@link Notification.Builder}
         ApplicationInfo applicationInfo = new ApplicationInfo();
-        applicationInfo.targetSdkVersion = Build.VERSION_CODES.CUR_DEVELOPMENT;
+        applicationInfo.targetSdkVersion = VERSION_CODES.CUR_DEVELOPMENT;
         when(mContext.getApplicationInfo()).thenReturn(applicationInfo);
 
         doNothing().when(mNetService).registerObserver(any());
@@ -315,6 +318,40 @@
     }
 
     @SmallTest
+    public void testIsAlwaysOnPackageSupported() throws Exception {
+        final Vpn vpn = createVpn(primaryUser.id);
+
+        ApplicationInfo appInfo = new ApplicationInfo();
+        when(mPackageManager.getApplicationInfoAsUser(eq(PKGS[0]), anyInt(), eq(primaryUser.id)))
+                .thenReturn(appInfo);
+
+        ServiceInfo svcInfo = new ServiceInfo();
+        ResolveInfo resInfo = new ResolveInfo();
+        resInfo.serviceInfo = svcInfo;
+        when(mPackageManager.queryIntentServicesAsUser(any(), eq(PackageManager.GET_META_DATA),
+                eq(primaryUser.id)))
+                .thenReturn(Collections.singletonList(resInfo));
+
+        // null package name should return false
+        assertFalse(vpn.isAlwaysOnPackageSupported(null));
+
+        // Pre-N apps are not supported
+        appInfo.targetSdkVersion = VERSION_CODES.M;
+        assertFalse(vpn.isAlwaysOnPackageSupported(PKGS[0]));
+
+        // N+ apps are supported by default
+        appInfo.targetSdkVersion = VERSION_CODES.N;
+        assertTrue(vpn.isAlwaysOnPackageSupported(PKGS[0]));
+
+        // Apps that opt out explicitly are not supported
+        appInfo.targetSdkVersion = VERSION_CODES.CUR_DEVELOPMENT;
+        Bundle metaData = new Bundle();
+        metaData.putBoolean(VpnService.SERVICE_META_DATA_SUPPORTS_ALWAYS_ON, false);
+        svcInfo.metaData = metaData;
+        assertFalse(vpn.isAlwaysOnPackageSupported(PKGS[0]));
+    }
+
+    @SmallTest
     public void testNotificationShownForAlwaysOnApp() {
         final UserHandle userHandle = UserHandle.of(primaryUser.id);
         final Vpn vpn = createVpn(primaryUser.id);
diff --git a/tests/net/java/com/android/server/net/NetworkStatsObserversTest.java b/tests/net/java/com/android/server/net/NetworkStatsObserversTest.java
index 92dcdac..2be5dae 100644
--- a/tests/net/java/com/android/server/net/NetworkStatsObserversTest.java
+++ b/tests/net/java/com/android/server/net/NetworkStatsObserversTest.java
@@ -27,6 +27,8 @@
 import static android.net.TrafficStats.MB_IN_BYTES;
 import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
 
+import static com.android.internal.util.TestUtils.waitForIdleHandler;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
@@ -56,7 +58,6 @@
 
 import com.android.internal.net.VpnInfo;
 import com.android.server.net.NetworkStatsService;
-import com.android.server.net.NetworkStatsServiceTest.IdleableHandlerThread;
 import com.android.server.net.NetworkStatsServiceTest.LatchedHandler;
 
 import java.util.ArrayList;
@@ -102,7 +103,7 @@
 
     private long mElapsedRealtime;
 
-    private IdleableHandlerThread mObserverHandlerThread;
+    private HandlerThread mObserverHandlerThread;
     private Handler mObserverNoopHandler;
 
     private LatchedHandler mHandler;
@@ -118,7 +119,7 @@
     public void setUp() throws Exception {
         MockitoAnnotations.initMocks(this);
 
-        mObserverHandlerThread = new IdleableHandlerThread("HandlerThread");
+        mObserverHandlerThread = new HandlerThread("HandlerThread");
         mObserverHandlerThread.start();
         final Looper observerLooper = mObserverHandlerThread.getLooper();
         mStatsObservers = new NetworkStatsObservers() {
@@ -319,7 +320,7 @@
                 xtSnapshot, uidSnapshot, mActiveIfaces, mActiveUidIfaces,
                 VPN_INFO, TEST_START);
         waitForObserverToIdle();
-        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, mHandler.mLastMessageType);
+        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, mHandler.lastMessageType);
     }
 
     @Test
@@ -356,7 +357,7 @@
                 xtSnapshot, uidSnapshot, mActiveIfaces, mActiveUidIfaces,
                 VPN_INFO, TEST_START);
         waitForObserverToIdle();
-        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, mHandler.mLastMessageType);
+        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, mHandler.lastMessageType);
     }
 
     @Test
@@ -429,7 +430,7 @@
                 xtSnapshot, uidSnapshot, mActiveIfaces, mActiveUidIfaces,
                 VPN_INFO, TEST_START);
         waitForObserverToIdle();
-        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, mHandler.mLastMessageType);
+        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, mHandler.lastMessageType);
     }
 
     @Test
@@ -470,19 +471,7 @@
     }
 
     private void waitForObserverToIdle() {
-        waitForIdleLooper(mObserverHandlerThread.getLooper(), WAIT_TIMEOUT_MS);
-        waitForIdleLooper(mHandler.getLooper(), WAIT_TIMEOUT_MS);
+        waitForIdleHandler(mObserverHandlerThread, WAIT_TIMEOUT_MS);
+        waitForIdleHandler(mHandler, WAIT_TIMEOUT_MS);
     }
-
-    // TODO: unify with ConnectivityService.waitForIdleHandler and
-    // NetworkServiceStatsTest.IdleableHandlerThread
-    private static void waitForIdleLooper(Looper looper, long timeoutMs) {
-        final ConditionVariable cv = new ConditionVariable();
-        final Handler handler = new Handler(looper);
-        handler.post(() -> cv.open());
-        if (!cv.block(timeoutMs)) {
-            fail("Looper did not become idle after " + timeoutMs + " ms");
-        }
-    }
-
 }
diff --git a/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java b/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java
index 029693f..fa99795 100644
--- a/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java
+++ b/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java
@@ -31,6 +31,8 @@
 import static android.net.NetworkStats.SET_ALL;
 import static android.net.NetworkStats.SET_DEFAULT;
 import static android.net.NetworkStats.SET_FOREGROUND;
+import static android.net.NetworkStats.STATS_PER_IFACE;
+import static android.net.NetworkStats.STATS_PER_UID;
 import static android.net.NetworkStats.TAG_NONE;
 import static android.net.NetworkStats.UID_ALL;
 import static android.net.NetworkStatsHistory.FIELD_ALL;
@@ -45,6 +47,7 @@
 import static android.text.format.DateUtils.WEEK_IN_MILLIS;
 
 import static com.android.server.net.NetworkStatsService.ACTION_NETWORK_STATS_POLL;
+import static com.android.internal.util.TestUtils.waitForIdleHandler;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -154,7 +157,7 @@
     private @Mock IConnectivityManager mConnManager;
     private @Mock IBinder mBinder;
     private @Mock AlarmManager mAlarmManager;
-    private IdleableHandlerThread mHandlerThread;
+    private HandlerThread mHandlerThread;
     private Handler mHandler;
 
     private NetworkStatsService mService;
@@ -181,7 +184,7 @@
                 mServiceContext, mNetManager, mAlarmManager, wakeLock, mTime,
                 TelephonyManager.getDefault(), mSettings, new NetworkStatsObservers(),
                 mStatsDir, getBaseDir(mStatsDir));
-        mHandlerThread = new IdleableHandlerThread("HandlerThread");
+        mHandlerThread = new HandlerThread("HandlerThread");
         mHandlerThread.start();
         Handler.Callback callback = new NetworkStatsService.HandlerCallback(mService);
         mHandler = new Handler(mHandlerThread.getLooper(), callback);
@@ -822,17 +825,24 @@
         incrementCurrentTime(HOUR_IN_MILLIS);
         expectCurrentTime();
         expectDefaultSettings();
-        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 2048L, 16L, 512L, 4L));
 
+        // Traffic seen by kernel counters (includes software tethering).
+        final NetworkStats ifaceStats = new NetworkStats(getElapsedRealtime(), 1)
+                .addIfaceValues(TEST_IFACE, 1536L, 12L, 384L, 3L);
+        // Hardware tethering traffic, not seen by kernel counters.
+        final NetworkStats tetherStatsHardware = new NetworkStats(getElapsedRealtime(), 1)
+                .addIfaceValues(TEST_IFACE, 512L, 4L, 128L, 1L);
+
+        // Traffic for UID_RED.
         final NetworkStats uidStats = new NetworkStats(getElapsedRealtime(), 1)
                 .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 128L, 2L, 128L, 2L, 0L);
-        final String[] tetherIfacePairs = new String[] { TEST_IFACE, "wlan0" };
+        // All tethering traffic, both hardware and software.
         final NetworkStats tetherStats = new NetworkStats(getElapsedRealtime(), 1)
                 .addValues(TEST_IFACE, UID_TETHERING, SET_DEFAULT, TAG_NONE, 1920L, 14L, 384L, 2L,
                         0L);
 
-        expectNetworkStatsUidDetail(uidStats, tetherIfacePairs, tetherStats);
+        expectNetworkStatsSummary(ifaceStats, tetherStatsHardware);
+        expectNetworkStatsUidDetail(uidStats, tetherStats);
         forcePollAndWaitForIdle();
 
         // verify service recorded history
@@ -886,7 +896,7 @@
 
         // Send dummy message to make sure that any previous message has been handled
         mHandler.sendMessage(mHandler.obtainMessage(-1));
-        mHandlerThread.waitForIdle(WAIT_TIMEOUT);
+        waitForIdleHandler(mHandler, WAIT_TIMEOUT);
 
 
 
@@ -908,7 +918,7 @@
         assertNetworkTotal(sTemplateWifi, 1024L, 1L, 2048L, 2L, 0);
 
         // make sure callback has not being called
-        assertEquals(INVALID_TYPE, latchedHandler.mLastMessageType);
+        assertEquals(INVALID_TYPE, latchedHandler.lastMessageType);
 
         // and bump forward again, with counters going higher. this is
         // important, since it will trigger the data usage callback
@@ -926,7 +936,7 @@
 
         // Wait for the caller to ack receipt of CALLBACK_LIMIT_REACHED
         assertTrue(cv.block(WAIT_TIMEOUT));
-        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, latchedHandler.mLastMessageType);
+        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, latchedHandler.lastMessageType);
         cv.close();
 
         // Allow binder to disconnect
@@ -937,7 +947,7 @@
 
         // Wait for the caller to ack receipt of CALLBACK_RELEASED
         assertTrue(cv.block(WAIT_TIMEOUT));
-        assertEquals(NetworkStatsManager.CALLBACK_RELEASED, latchedHandler.mLastMessageType);
+        assertEquals(NetworkStatsManager.CALLBACK_RELEASED, latchedHandler.lastMessageType);
 
         // Make sure that the caller binder gets disconnected
         verify(mBinder).unlinkToDeath(any(IBinder.DeathRecipient.class), anyInt());
@@ -1012,10 +1022,16 @@
     }
 
     private void expectNetworkStatsSummary(NetworkStats summary) throws Exception {
+        expectNetworkStatsSummary(summary, new NetworkStats(0L, 0));
+    }
+
+    private void expectNetworkStatsSummary(NetworkStats summary, NetworkStats tetherStats)
+            throws Exception {
         when(mConnManager.getAllVpnInfo()).thenReturn(new VpnInfo[0]);
 
-        expectNetworkStatsSummaryDev(summary);
-        expectNetworkStatsSummaryXt(summary);
+        expectNetworkStatsTethering(STATS_PER_IFACE, tetherStats);
+        expectNetworkStatsSummaryDev(summary.clone());
+        expectNetworkStatsSummaryXt(summary.clone());
     }
 
     private void expectNetworkStatsSummaryDev(NetworkStats summary) throws Exception {
@@ -1026,17 +1042,21 @@
         when(mNetManager.getNetworkStatsSummaryXt()).thenReturn(summary);
     }
 
-    private void expectNetworkStatsUidDetail(NetworkStats detail) throws Exception {
-        expectNetworkStatsUidDetail(detail, new String[0], new NetworkStats(0L, 0));
+    private void expectNetworkStatsTethering(int how, NetworkStats stats)
+            throws Exception {
+        when(mNetManager.getNetworkStatsTethering(how)).thenReturn(stats);
     }
 
-    private void expectNetworkStatsUidDetail(
-            NetworkStats detail, String[] tetherIfacePairs, NetworkStats tetherStats)
+    private void expectNetworkStatsUidDetail(NetworkStats detail) throws Exception {
+        expectNetworkStatsUidDetail(detail, new NetworkStats(0L, 0));
+    }
+
+    private void expectNetworkStatsUidDetail(NetworkStats detail, NetworkStats tetherStats)
             throws Exception {
         when(mNetManager.getNetworkStatsUidDetail(UID_ALL)).thenReturn(detail);
 
         // also include tethering details, since they are folded into UID
-        when(mNetManager.getNetworkStatsTethering()).thenReturn(tetherStats);
+        when(mNetManager.getNetworkStatsTethering(STATS_PER_UID)).thenReturn(tetherStats);
     }
 
     private void expectDefaultSettings() throws Exception {
@@ -1203,12 +1223,12 @@
         mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
         // Send dummy message to make sure that any previous message has been handled
         mHandler.sendMessage(mHandler.obtainMessage(-1));
-        mHandlerThread.waitForIdle(WAIT_TIMEOUT);
+        waitForIdleHandler(mHandler, WAIT_TIMEOUT);
     }
 
     static class LatchedHandler extends Handler {
         private final ConditionVariable mCv;
-        int mLastMessageType = INVALID_TYPE;
+        int lastMessageType = INVALID_TYPE;
 
         LatchedHandler(Looper looper, ConditionVariable cv) {
             super(looper);
@@ -1217,49 +1237,9 @@
 
         @Override
         public void handleMessage(Message msg) {
-            mLastMessageType = msg.what;
+            lastMessageType = msg.what;
             mCv.open();
             super.handleMessage(msg);
         }
     }
-
-    /**
-     * A subclass of HandlerThread that allows callers to wait for it to become idle. waitForIdle
-     * will return immediately if the handler is already idle.
-     */
-    static class IdleableHandlerThread extends HandlerThread {
-        private IdleHandler mIdleHandler;
-
-        public IdleableHandlerThread(String name) {
-            super(name);
-        }
-
-        public void waitForIdle(long timeoutMs) {
-            final ConditionVariable cv = new ConditionVariable();
-            final MessageQueue queue = getLooper().getQueue();
-
-            synchronized (queue) {
-                if (queue.isIdle()) {
-                    return;
-                }
-
-                assertNull("BUG: only one idle handler allowed", mIdleHandler);
-                mIdleHandler = new IdleHandler() {
-                    public boolean queueIdle() {
-                        cv.open();
-                        mIdleHandler = null;
-                        return false;  // Remove the handler.
-                    }
-                };
-                queue.addIdleHandler(mIdleHandler);
-            }
-
-            if (!cv.block(timeoutMs)) {
-                fail("HandlerThread " + getName() + " did not become idle after " + timeoutMs
-                        + " ms");
-                queue.removeIdleHandler(mIdleHandler);
-            }
-        }
-    }
-
 }