Add MdnsInterfaceSocket and MdnsSocketProvider
MdnsInterfaceSocket: using for listening the multicast
socket on specific interface.
MdnsSocketProvider: using for creating and managing the
multiple multicast sockets.
- Listen NetworkCallback and TetheringEventCallback to know the
network connected / disconnected changes. And use the callbacks
to create / remove the sockets for mdns discovery
Bug: 254166302
Test: atest FrameworksNetTests
Change-Id: Icd8424792e89e71198fa31f9ec92e1ec8172128d
diff --git a/service/Android.bp b/service/Android.bp
index 9371b02..98bbbac 100644
--- a/service/Android.bp
+++ b/service/Android.bp
@@ -203,6 +203,7 @@
libs: [
"framework-annotations-lib",
"framework-connectivity-pre-jarjar",
+ "framework-tethering",
"framework-wifi",
"service-connectivity-pre-jarjar",
],
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java b/service/mdns/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java
index 1faa6ce..0f3c23a 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java
@@ -21,6 +21,7 @@
import android.annotation.RequiresPermission;
import android.text.TextUtils;
import android.util.ArrayMap;
+import android.util.Log;
import com.android.internal.annotations.VisibleForTesting;
import com.android.server.connectivity.mdns.util.MdnsLogger;
@@ -34,7 +35,8 @@
* notify them when a mDNS service instance is found, updated, or removed?
*/
public class MdnsDiscoveryManager implements MdnsSocketClient.Callback {
-
+ private static final String TAG = MdnsDiscoveryManager.class.getSimpleName();
+ public static final boolean DBG = Log.isLoggable(TAG, Log.DEBUG);
private static final MdnsLogger LOGGER = new MdnsLogger("MdnsDiscoveryManager");
private final ExecutorProvider executorProvider;
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceSocket.java b/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceSocket.java
new file mode 100644
index 0000000..6090415
--- /dev/null
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceSocket.java
@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2022 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.mdns;
+
+import static com.android.server.connectivity.mdns.MdnsSocket.MULTICAST_IPV4_ADDRESS;
+import static com.android.server.connectivity.mdns.MdnsSocket.MULTICAST_IPV6_ADDRESS;
+
+import android.annotation.NonNull;
+import android.net.LinkAddress;
+import android.net.util.SocketUtils;
+import android.os.ParcelFileDescriptor;
+import android.system.ErrnoException;
+import android.util.Log;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.InetSocketAddress;
+import java.net.MulticastSocket;
+import java.net.NetworkInterface;
+import java.util.List;
+
+/**
+ * {@link MdnsInterfaceSocket} provides a similar interface to {@link MulticastSocket} and binds to
+ * an available multicast network interfaces.
+ *
+ * <p>This isn't thread safe and should be always called on the same thread unless specified
+ * otherwise.
+ *
+ * @see MulticastSocket for javadoc of each public method.
+ */
+public class MdnsInterfaceSocket {
+ private static final String TAG = MdnsInterfaceSocket.class.getSimpleName();
+ @NonNull private final MulticastSocket mMulticastSocket;
+ @NonNull private final NetworkInterface mNetworkInterface;
+ private boolean mJoinedIpv4 = false;
+ private boolean mJoinedIpv6 = false;
+
+ public MdnsInterfaceSocket(@NonNull NetworkInterface networkInterface, int port)
+ throws IOException {
+ mNetworkInterface = networkInterface;
+ mMulticastSocket = new MulticastSocket(port);
+ // RFC Spec: https://tools.ietf.org/html/rfc6762. Time to live is set 255
+ mMulticastSocket.setTimeToLive(255);
+ mMulticastSocket.setNetworkInterface(networkInterface);
+
+ // Bind socket to the interface for receiving from that interface only.
+ try (ParcelFileDescriptor pfd = ParcelFileDescriptor.fromDatagramSocket(mMulticastSocket)) {
+ SocketUtils.bindSocketToInterface(pfd.getFileDescriptor(), mNetworkInterface.getName());
+ } catch (ErrnoException e) {
+ throw new IOException("Error setting socket options", e);
+ }
+ }
+
+ /**
+ * Sends a datagram packet from this socket.
+ *
+ * <p>This method could be used on any thread.
+ */
+ public void send(@NonNull DatagramPacket packet) throws IOException {
+ mMulticastSocket.send(packet);
+ }
+
+ /**
+ * Receives a datagram packet from this socket.
+ *
+ * <p>This method could be used on any thread.
+ */
+ public void receive(@NonNull DatagramPacket packet) throws IOException {
+ mMulticastSocket.receive(packet);
+ }
+
+ private boolean hasIpv4Address(List<LinkAddress> addresses) {
+ for (LinkAddress address : addresses) {
+ if (address.isIpv4()) return true;
+ }
+ return false;
+ }
+
+ private boolean hasIpv6Address(List<LinkAddress> addresses) {
+ for (LinkAddress address : addresses) {
+ if (address.isIpv6()) return true;
+ }
+ return false;
+ }
+
+ /*** Joins both IPv4 and IPv6 multicast groups. */
+ public void joinGroup(@NonNull List<LinkAddress> addresses) {
+ maybeJoinIpv4(addresses);
+ maybeJoinIpv6(addresses);
+ }
+
+ private boolean joinGroup(InetSocketAddress multicastAddress) {
+ try {
+ mMulticastSocket.joinGroup(multicastAddress, mNetworkInterface);
+ return true;
+ } catch (IOException e) {
+ // The address may have just been removed
+ Log.e(TAG, "Error joining multicast group for " + mNetworkInterface, e);
+ return false;
+ }
+ }
+
+ private void maybeJoinIpv4(List<LinkAddress> addresses) {
+ final boolean hasAddr = hasIpv4Address(addresses);
+ if (!mJoinedIpv4 && hasAddr) {
+ mJoinedIpv4 = joinGroup(MULTICAST_IPV4_ADDRESS);
+ } else if (!hasAddr) {
+ // Lost IPv4 address
+ mJoinedIpv4 = false;
+ }
+ }
+
+ private void maybeJoinIpv6(List<LinkAddress> addresses) {
+ final boolean hasAddr = hasIpv6Address(addresses);
+ if (!mJoinedIpv6 && hasAddr) {
+ mJoinedIpv6 = joinGroup(MULTICAST_IPV6_ADDRESS);
+ } else if (!hasAddr) {
+ // Lost IPv6 address
+ mJoinedIpv6 = false;
+ }
+ }
+
+ /*** Destroy this socket by leaving all joined multicast groups and closing this socket. */
+ public void destroy() {
+ if (mJoinedIpv4) {
+ try {
+ mMulticastSocket.leaveGroup(MULTICAST_IPV4_ADDRESS, mNetworkInterface);
+ } catch (IOException e) {
+ Log.e(TAG, "Error leaving IPv4 group for " + mNetworkInterface, e);
+ }
+ }
+ if (mJoinedIpv6) {
+ try {
+ mMulticastSocket.leaveGroup(MULTICAST_IPV6_ADDRESS, mNetworkInterface);
+ } catch (IOException e) {
+ Log.e(TAG, "Error leaving IPv4 group for " + mNetworkInterface, e);
+ }
+ }
+ mMulticastSocket.close();
+ }
+
+ /**
+ * Returns the index of the network interface that this socket is bound to. If the interface
+ * cannot be determined, returns -1.
+ *
+ * <p>This method could be used on any thread.
+ */
+ public int getInterfaceIndex() {
+ return mNetworkInterface.getIndex();
+ }
+
+ /*** Returns whether this socket has joined IPv4 group */
+ public boolean hasJoinedIpv4() {
+ return mJoinedIpv4;
+ }
+
+ /*** Returns whether this socket has joined IPv6 group */
+ public boolean hasJoinedIpv6() {
+ return mJoinedIpv6;
+ }
+}
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsSearchOptions.java b/service/mdns/com/android/server/connectivity/mdns/MdnsSearchOptions.java
index 195bc8e..583c4a9 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsSearchOptions.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsSearchOptions.java
@@ -17,6 +17,8 @@
package com.android.server.connectivity.mdns;
import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.net.Network;
import android.os.Parcel;
import android.os.Parcelable;
import android.text.TextUtils;
@@ -43,7 +45,8 @@
@Override
public MdnsSearchOptions createFromParcel(Parcel source) {
return new MdnsSearchOptions(source.createStringArrayList(),
- source.readBoolean(), source.readBoolean());
+ source.readBoolean(), source.readBoolean(),
+ source.readParcelable(null));
}
@Override
@@ -56,15 +59,19 @@
private final boolean isPassiveMode;
private final boolean removeExpiredService;
+ // The target network for searching. Null network means search on all possible interfaces.
+ @Nullable private final Network mNetwork;
- /** Parcelable constructs for a {@link MdnsServiceInfo}. */
- MdnsSearchOptions(List<String> subtypes, boolean isPassiveMode, boolean removeExpiredService) {
+ /** Parcelable constructs for a {@link MdnsSearchOptions}. */
+ MdnsSearchOptions(List<String> subtypes, boolean isPassiveMode, boolean removeExpiredService,
+ @Nullable Network network) {
this.subtypes = new ArrayList<>();
if (subtypes != null) {
this.subtypes.addAll(subtypes);
}
this.isPassiveMode = isPassiveMode;
this.removeExpiredService = removeExpiredService;
+ mNetwork = network;
}
/** Returns a {@link Builder} for {@link MdnsSearchOptions}. */
@@ -98,6 +105,16 @@
return removeExpiredService;
}
+ /**
+ * Returns the network which the mdns query should target on.
+ *
+ * @return the target network or null if search on all possible interfaces.
+ */
+ @Nullable
+ public Network getNetwork() {
+ return mNetwork;
+ }
+
@Override
public int describeContents() {
return 0;
@@ -108,6 +125,7 @@
out.writeStringList(subtypes);
out.writeBoolean(isPassiveMode);
out.writeBoolean(removeExpiredService);
+ out.writeParcelable(mNetwork, 0);
}
/** A builder to create {@link MdnsSearchOptions}. */
@@ -115,6 +133,7 @@
private final Set<String> subtypes;
private boolean isPassiveMode = true;
private boolean removeExpiredService;
+ private Network mNetwork;
private Builder() {
subtypes = new ArraySet<>();
@@ -165,10 +184,20 @@
return this;
}
+ /**
+ * Sets if the mdns query should target on specific network.
+ *
+ * @param network the mdns query will target on given network.
+ */
+ public Builder setNetwork(Network network) {
+ mNetwork = network;
+ return this;
+ }
+
/** Builds a {@link MdnsSearchOptions} with the arguments supplied to this builder. */
public MdnsSearchOptions build() {
- return new MdnsSearchOptions(
- new ArrayList<>(subtypes), isPassiveMode, removeExpiredService);
+ return new MdnsSearchOptions(new ArrayList<>(subtypes), isPassiveMode,
+ removeExpiredService, mNetwork);
}
}
}
\ No newline at end of file
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsSocket.java b/service/mdns/com/android/server/connectivity/mdns/MdnsSocket.java
index f8452c9..64c4495 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsSocket.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsSocket.java
@@ -40,9 +40,9 @@
private static final MdnsLogger LOGGER = new MdnsLogger("MdnsSocket");
static final int INTERFACE_INDEX_UNSPECIFIED = -1;
- private static final InetSocketAddress MULTICAST_IPV4_ADDRESS =
+ protected static final InetSocketAddress MULTICAST_IPV4_ADDRESS =
new InetSocketAddress(MdnsConstants.getMdnsIPv4Address(), MdnsConstants.MDNS_PORT);
- private static final InetSocketAddress MULTICAST_IPV6_ADDRESS =
+ protected static final InetSocketAddress MULTICAST_IPV6_ADDRESS =
new InetSocketAddress(MdnsConstants.getMdnsIPv6Address(), MdnsConstants.MDNS_PORT);
private final MulticastNetworkInterfaceProvider multicastNetworkInterfaceProvider;
private final MulticastSocket multicastSocket;
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsSocketProvider.java b/service/mdns/com/android/server/connectivity/mdns/MdnsSocketProvider.java
new file mode 100644
index 0000000..b8c324e
--- /dev/null
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsSocketProvider.java
@@ -0,0 +1,460 @@
+/*
+ * Copyright (C) 2022 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.mdns;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.ConnectivityManager.NetworkCallback;
+import android.net.INetd;
+import android.net.LinkAddress;
+import android.net.LinkProperties;
+import android.net.Network;
+import android.net.NetworkRequest;
+import android.net.TetheringManager;
+import android.net.TetheringManager.TetheringEventCallback;
+import android.os.Handler;
+import android.os.Looper;
+import android.system.OsConstants;
+import android.util.ArrayMap;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.LinkPropertiesUtils.CompareResult;
+import com.android.net.module.util.ip.NetlinkMonitor;
+import com.android.net.module.util.netlink.NetlinkConstants;
+import com.android.net.module.util.netlink.NetlinkMessage;
+import com.android.server.connectivity.mdns.util.MdnsLogger;
+
+import java.io.IOException;
+import java.net.InterfaceAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The {@link MdnsSocketProvider} manages the multiple sockets for mDns.
+ *
+ * <p>This class is not thread safe, it is intended to be used only from the looper thread.
+ * However, the constructor is an exception, as it is called on another thread;
+ * therefore for thread safety all members of this class MUST either be final or initialized
+ * to their default value (0, false or null).
+ *
+ */
+public class MdnsSocketProvider {
+ private static final String TAG = MdnsSocketProvider.class.getSimpleName();
+ private static final boolean DBG = MdnsDiscoveryManager.DBG;
+ private static final MdnsLogger LOGGER = new MdnsLogger(TAG);
+ @NonNull private final Context mContext;
+ @NonNull private final Handler mHandler;
+ @NonNull private final Dependencies mDependencies;
+ @NonNull private final NetworkCallback mNetworkCallback;
+ @NonNull private final TetheringEventCallback mTetheringEventCallback;
+ @NonNull private final NetlinkMonitor mNetlinkMonitor;
+ private final ArrayMap<Network, SocketInfo> mNetworkSockets = new ArrayMap<>();
+ private final ArrayMap<String, SocketInfo> mTetherInterfaceSockets = new ArrayMap<>();
+ private final ArrayMap<Network, LinkProperties> mActiveNetworksLinkProperties =
+ new ArrayMap<>();
+ private final ArrayMap<SocketCallback, Network> mCallbacksToRequestedNetworks =
+ new ArrayMap<>();
+ private final List<String> mLocalOnlyInterfaces = new ArrayList<>();
+ private final List<String> mTetheredInterfaces = new ArrayList<>();
+ private boolean mMonitoringSockets = false;
+
+ public MdnsSocketProvider(@NonNull Context context, @NonNull Looper looper) {
+ this(context, looper, new Dependencies());
+ }
+
+ MdnsSocketProvider(@NonNull Context context, @NonNull Looper looper,
+ @NonNull Dependencies deps) {
+ mContext = context;
+ mHandler = new Handler(looper);
+ mDependencies = deps;
+ mNetworkCallback = new NetworkCallback() {
+ @Override
+ public void onLost(Network network) {
+ mActiveNetworksLinkProperties.remove(network);
+ removeSocket(network, null /* interfaceName */);
+ }
+
+ @Override
+ public void onLinkPropertiesChanged(Network network, LinkProperties lp) {
+ handleLinkPropertiesChanged(network, lp);
+ }
+ };
+ mTetheringEventCallback = new TetheringEventCallback() {
+ @Override
+ public void onLocalOnlyInterfacesChanged(@NonNull List<String> interfaces) {
+ handleTetherInterfacesChanged(mLocalOnlyInterfaces, interfaces);
+ }
+
+ @Override
+ public void onTetheredInterfacesChanged(@NonNull List<String> interfaces) {
+ handleTetherInterfacesChanged(mTetheredInterfaces, interfaces);
+ }
+ };
+
+ mNetlinkMonitor = new SocketNetlinkMonitor(mHandler);
+ }
+
+ /**
+ * Dependencies of MdnsSocketProvider, for injection in tests.
+ */
+ @VisibleForTesting
+ public static class Dependencies {
+ /*** Get network interface by given interface name */
+ public NetworkInterfaceWrapper getNetworkInterfaceByName(String interfaceName)
+ throws SocketException {
+ final NetworkInterface ni = NetworkInterface.getByName(interfaceName);
+ return ni == null ? null : new NetworkInterfaceWrapper(ni);
+ }
+
+ /*** Check whether given network interface can support mdns */
+ public boolean canScanOnInterface(NetworkInterfaceWrapper networkInterface) {
+ return MulticastNetworkInterfaceProvider.canScanOnInterface(networkInterface);
+ }
+
+ /*** Create a MdnsInterfaceSocket */
+ public MdnsInterfaceSocket createMdnsInterfaceSocket(NetworkInterface networkInterface,
+ int port) throws IOException {
+ return new MdnsInterfaceSocket(networkInterface, port);
+ }
+ }
+
+ /*** Data class for storing socket related info */
+ private static class SocketInfo {
+ final MdnsInterfaceSocket mSocket;
+ final List<LinkAddress> mAddresses = new ArrayList<>();
+
+ SocketInfo(MdnsInterfaceSocket socket, List<LinkAddress> addresses) {
+ mSocket = socket;
+ mAddresses.addAll(addresses);
+ }
+ }
+
+ private static class SocketNetlinkMonitor extends NetlinkMonitor {
+ SocketNetlinkMonitor(Handler handler) {
+ super(handler, LOGGER.mLog, TAG, OsConstants.NETLINK_ROUTE,
+ NetlinkConstants.RTMGRP_IPV4_IFADDR | NetlinkConstants.RTMGRP_IPV6_IFADDR);
+ }
+
+ @Override
+ public void processNetlinkMessage(NetlinkMessage nlMsg, long whenMs) {
+ // TODO: Handle netlink message.
+ }
+ }
+
+ private void ensureRunningOnHandlerThread() {
+ if (mHandler.getLooper().getThread() != Thread.currentThread()) {
+ throw new IllegalStateException(
+ "Not running on Handler thread: " + Thread.currentThread().getName());
+ }
+ }
+
+ /*** Start monitoring sockets by listening callbacks for sockets creation or removal */
+ public void startMonitoringSockets() {
+ ensureRunningOnHandlerThread();
+ if (mMonitoringSockets) {
+ Log.d(TAG, "Already monitoring sockets.");
+ return;
+ }
+ if (DBG) Log.d(TAG, "Start monitoring sockets.");
+ mContext.getSystemService(ConnectivityManager.class).registerNetworkCallback(
+ new NetworkRequest.Builder().clearCapabilities().build(),
+ mNetworkCallback, mHandler);
+
+ final TetheringManager tetheringManager = mContext.getSystemService(TetheringManager.class);
+ tetheringManager.registerTetheringEventCallback(mHandler::post, mTetheringEventCallback);
+
+ mHandler.post(mNetlinkMonitor::start);
+ mMonitoringSockets = true;
+ }
+
+ /*** Stop monitoring sockets and unregister callbacks */
+ public void stopMonitoringSockets() {
+ ensureRunningOnHandlerThread();
+ if (!mMonitoringSockets) {
+ Log.d(TAG, "Monitoring sockets hasn't been started.");
+ return;
+ }
+ if (DBG) Log.d(TAG, "Stop monitoring sockets.");
+ mContext.getSystemService(ConnectivityManager.class)
+ .unregisterNetworkCallback(mNetworkCallback);
+
+ final TetheringManager tetheringManager = mContext.getSystemService(TetheringManager.class);
+ tetheringManager.unregisterTetheringEventCallback(mTetheringEventCallback);
+
+ mHandler.post(mNetlinkMonitor::stop);
+ mMonitoringSockets = false;
+ }
+
+ private static boolean isNetworkMatched(@Nullable Network targetNetwork,
+ @NonNull Network currentNetwork) {
+ return targetNetwork == null || targetNetwork.equals(currentNetwork);
+ }
+
+ private boolean matchRequestedNetwork(Network network) {
+ for (int i = 0; i < mCallbacksToRequestedNetworks.size(); i++) {
+ final Network requestedNetwork = mCallbacksToRequestedNetworks.valueAt(i);
+ if (isNetworkMatched(requestedNetwork, network)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ private boolean hasAllNetworksRequest() {
+ return mCallbacksToRequestedNetworks.containsValue(null);
+ }
+
+ private void handleLinkPropertiesChanged(Network network, LinkProperties lp) {
+ mActiveNetworksLinkProperties.put(network, lp);
+ if (!matchRequestedNetwork(network)) {
+ if (DBG) {
+ Log.d(TAG, "Ignore LinkProperties change. There is no request for the"
+ + " Network:" + network);
+ }
+ return;
+ }
+
+ final SocketInfo socketInfo = mNetworkSockets.get(network);
+ if (socketInfo == null) {
+ createSocket(network, lp);
+ } else {
+ // Update the addresses of this socket.
+ final List<LinkAddress> addresses = lp.getLinkAddresses();
+ socketInfo.mAddresses.clear();
+ socketInfo.mAddresses.addAll(addresses);
+ // Try to join the group again.
+ socketInfo.mSocket.joinGroup(addresses);
+
+ notifyAddressesChanged(network, lp);
+ }
+ }
+
+ private static LinkProperties createLPForTetheredInterface(String interfaceName) {
+ final LinkProperties linkProperties = new LinkProperties();
+ linkProperties.setInterfaceName(interfaceName);
+ // TODO: Use NetlinkMonitor to update addresses for tethering interfaces.
+ return linkProperties;
+ }
+
+ private void handleTetherInterfacesChanged(List<String> current, List<String> updated) {
+ if (!hasAllNetworksRequest()) {
+ // Currently, the network for tethering can not be requested, so the sockets for
+ // tethering are only created if there is a request for all networks (interfaces).
+ // Therefore, this change can skip if there is no such request.
+ if (DBG) {
+ Log.d(TAG, "Ignore tether interfaces change. There is no request for all"
+ + " networks.");
+ }
+ return;
+ }
+
+ final CompareResult<String> interfaceDiff = new CompareResult<>(
+ current, updated);
+ for (String name : interfaceDiff.added) {
+ createSocket(new Network(INetd.LOCAL_NET_ID), createLPForTetheredInterface(name));
+ }
+ for (String name : interfaceDiff.removed) {
+ removeSocket(new Network(INetd.LOCAL_NET_ID), name);
+ }
+ current.clear();
+ current.addAll(updated);
+ }
+
+ private static List<LinkAddress> getLinkAddressFromNetworkInterface(
+ NetworkInterfaceWrapper networkInterface) {
+ List<LinkAddress> addresses = new ArrayList<>();
+ for (InterfaceAddress address : networkInterface.getInterfaceAddresses()) {
+ addresses.add(new LinkAddress(address));
+ }
+ return addresses;
+ }
+
+ private void createSocket(Network network, LinkProperties lp) {
+ final String interfaceName = lp.getInterfaceName();
+ if (interfaceName == null) {
+ Log.e(TAG, "Can not create socket with null interface name.");
+ return;
+ }
+
+ try {
+ final NetworkInterfaceWrapper networkInterface =
+ mDependencies.getNetworkInterfaceByName(interfaceName);
+ if (networkInterface == null || !mDependencies.canScanOnInterface(networkInterface)) {
+ return;
+ }
+
+ if (DBG) {
+ Log.d(TAG, "Create a socket on network:" + network
+ + " with interfaceName:" + interfaceName);
+ }
+ final MdnsInterfaceSocket socket = mDependencies.createMdnsInterfaceSocket(
+ networkInterface.getNetworkInterface(), MdnsConstants.MDNS_PORT);
+ final List<LinkAddress> addresses;
+ if (network.netId == INetd.LOCAL_NET_ID) {
+ addresses = getLinkAddressFromNetworkInterface(networkInterface);
+ mTetherInterfaceSockets.put(interfaceName, new SocketInfo(socket, addresses));
+ } else {
+ addresses = lp.getLinkAddresses();
+ mNetworkSockets.put(network, new SocketInfo(socket, addresses));
+ }
+ // Try to join IPv4/IPv6 group.
+ socket.joinGroup(addresses);
+
+ // Notify the listeners which need this socket.
+ notifySocketCreated(network, socket, addresses);
+ } catch (IOException e) {
+ Log.e(TAG, "Create a socket failed with interface=" + interfaceName, e);
+ }
+ }
+
+ private void removeSocket(Network network, String interfaceName) {
+ final SocketInfo socketInfo = network.netId == INetd.LOCAL_NET_ID
+ ? mTetherInterfaceSockets.remove(interfaceName)
+ : mNetworkSockets.remove(network);
+ if (socketInfo == null) return;
+
+ socketInfo.mSocket.destroy();
+ notifyInterfaceDestroyed(network, socketInfo.mSocket);
+ }
+
+ private void notifySocketCreated(Network network, MdnsInterfaceSocket socket,
+ List<LinkAddress> addresses) {
+ for (int i = 0; i < mCallbacksToRequestedNetworks.size(); i++) {
+ final Network requestedNetwork = mCallbacksToRequestedNetworks.valueAt(i);
+ if (isNetworkMatched(requestedNetwork, network)) {
+ mCallbacksToRequestedNetworks.keyAt(i).onSocketCreated(network, socket, addresses);
+ }
+ }
+ }
+
+ private void notifyInterfaceDestroyed(Network network, MdnsInterfaceSocket socket) {
+ for (int i = 0; i < mCallbacksToRequestedNetworks.size(); i++) {
+ final Network requestedNetwork = mCallbacksToRequestedNetworks.valueAt(i);
+ if (isNetworkMatched(requestedNetwork, network)) {
+ mCallbacksToRequestedNetworks.keyAt(i).onInterfaceDestroyed(network, socket);
+ }
+ }
+ }
+
+ private void notifyAddressesChanged(Network network, LinkProperties lp) {
+ for (int i = 0; i < mCallbacksToRequestedNetworks.size(); i++) {
+ final Network requestedNetwork = mCallbacksToRequestedNetworks.valueAt(i);
+ if (isNetworkMatched(requestedNetwork, network)) {
+ mCallbacksToRequestedNetworks.keyAt(i)
+ .onAddressesChanged(network, lp.getLinkAddresses());
+ }
+ }
+ }
+
+ private void retrieveAndNotifySocketFromNetwork(Network network, SocketCallback cb) {
+ final SocketInfo socketInfo = mNetworkSockets.get(network);
+ if (socketInfo == null) {
+ final LinkProperties lp = mActiveNetworksLinkProperties.get(network);
+ if (lp == null) {
+ // The requested network is not existed. Maybe wait for LinkProperties change later.
+ if (DBG) Log.d(TAG, "There is no LinkProperties for this network:" + network);
+ return;
+ }
+ createSocket(network, lp);
+ } else {
+ // Notify the socket for requested network.
+ cb.onSocketCreated(network, socketInfo.mSocket, socketInfo.mAddresses);
+ }
+ }
+
+ private void retrieveAndNotifySocketFromInterface(String interfaceName, SocketCallback cb) {
+ final SocketInfo socketInfo = mTetherInterfaceSockets.get(interfaceName);
+ if (socketInfo == null) {
+ createSocket(
+ new Network(INetd.LOCAL_NET_ID), createLPForTetheredInterface(interfaceName));
+ } else {
+ // Notify the socket for requested network.
+ cb.onSocketCreated(
+ new Network(INetd.LOCAL_NET_ID), socketInfo.mSocket, socketInfo.mAddresses);
+ }
+ }
+
+ /**
+ * Request a socket for given network.
+ *
+ * @param network the required network for a socket. Null means create sockets on all possible
+ * networks (interfaces).
+ * @param cb the callback to listen the socket creation.
+ */
+ public void requestSocket(@Nullable Network network, @NonNull SocketCallback cb) {
+ ensureRunningOnHandlerThread();
+ mCallbacksToRequestedNetworks.put(cb, network);
+ if (network == null) {
+ // Does not specify a required network, create sockets for all possible
+ // networks (interfaces).
+ for (int i = 0; i < mActiveNetworksLinkProperties.size(); i++) {
+ retrieveAndNotifySocketFromNetwork(mActiveNetworksLinkProperties.keyAt(i), cb);
+ }
+
+ for (String localInterface : mLocalOnlyInterfaces) {
+ retrieveAndNotifySocketFromInterface(localInterface, cb);
+ }
+
+ for (String tetheredInterface : mTetheredInterfaces) {
+ retrieveAndNotifySocketFromInterface(tetheredInterface, cb);
+ }
+ } else {
+ retrieveAndNotifySocketFromNetwork(network, cb);
+ }
+ }
+
+ /*** Unrequest the socket */
+ public void unrequestSocket(@NonNull SocketCallback cb) {
+ ensureRunningOnHandlerThread();
+ mCallbacksToRequestedNetworks.remove(cb);
+ if (hasAllNetworksRequest()) {
+ // Still has a request for all networks (interfaces).
+ return;
+ }
+
+ // Check if remaining requests are matched any of sockets.
+ for (int i = mNetworkSockets.size() - 1; i >= 0; i--) {
+ if (matchRequestedNetwork(mNetworkSockets.keyAt(i))) continue;
+ mNetworkSockets.removeAt(i).mSocket.destroy();
+ }
+
+ // Remove all sockets for tethering interface because these sockets do not have associated
+ // networks, and they should invoke by a request for all networks (interfaces). If there is
+ // no such request, the sockets for tethering interface should be removed.
+ for (int i = mTetherInterfaceSockets.size() - 1; i >= 0; i--) {
+ mTetherInterfaceSockets.removeAt(i).mSocket.destroy();
+ }
+ }
+
+ /*** Callbacks for listening socket changes */
+ public interface SocketCallback {
+ /*** Notify the socket is created */
+ default void onSocketCreated(@NonNull Network network, @NonNull MdnsInterfaceSocket socket,
+ @NonNull List<LinkAddress> addresses) {}
+ /*** Notify the interface is destroyed */
+ default void onInterfaceDestroyed(@NonNull Network network,
+ @NonNull MdnsInterfaceSocket socket) {}
+ /*** Notify the addresses is changed on the network */
+ default void onAddressesChanged(@NonNull Network network,
+ @NonNull List<LinkAddress> addresses) {}
+ }
+}
diff --git a/service/mdns/com/android/server/connectivity/mdns/MulticastNetworkInterfaceProvider.java b/service/mdns/com/android/server/connectivity/mdns/MulticastNetworkInterfaceProvider.java
index 644460d..ade7b95 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MulticastNetworkInterfaceProvider.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MulticastNetworkInterfaceProvider.java
@@ -147,7 +147,8 @@
return connectivityMonitor.getAvailableNetwork();
}
- private boolean canScanOnInterface(@Nullable NetworkInterfaceWrapper networkInterface) {
+ /*** Check whether given network interface can support mdns */
+ public static boolean canScanOnInterface(@Nullable NetworkInterfaceWrapper networkInterface) {
try {
if ((networkInterface == null)
|| networkInterface.isLoopback()
@@ -166,7 +167,7 @@
return false;
}
- private boolean hasInet4Address(@NonNull NetworkInterfaceWrapper networkInterface) {
+ private static boolean hasInet4Address(@NonNull NetworkInterfaceWrapper networkInterface) {
for (InterfaceAddress ifAddr : networkInterface.getInterfaceAddresses()) {
if (ifAddr.getAddress() instanceof Inet4Address) {
return true;
@@ -175,7 +176,7 @@
return false;
}
- private boolean hasInet6Address(@NonNull NetworkInterfaceWrapper networkInterface) {
+ private static boolean hasInet6Address(@NonNull NetworkInterfaceWrapper networkInterface) {
for (InterfaceAddress ifAddr : networkInterface.getInterfaceAddresses()) {
if (ifAddr.getAddress() instanceof Inet6Address) {
return true;
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketClientTests.java b/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketClientTests.java
index b4442a5..1d61cd3 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketClientTests.java
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketClientTests.java
@@ -501,8 +501,7 @@
//MdnsConfigsFlagsImpl.allowNetworkInterfaceIndexPropagation.override(true);
when(mockMulticastSocket.getInterfaceIndex()).thenReturn(21);
- mdnsClient =
- new MdnsSocketClient(mContext, mockMulticastLock) {
+ mdnsClient = new MdnsSocketClient(mContext, mockMulticastLock) {
@Override
MdnsSocket createMdnsSocket(int port) {
if (port == MdnsConstants.MDNS_PORT) {
@@ -525,8 +524,7 @@
//MdnsConfigsFlagsImpl.allowNetworkInterfaceIndexPropagation.override(false);
when(mockMulticastSocket.getInterfaceIndex()).thenReturn(21);
- mdnsClient =
- new MdnsSocketClient(mContext, mockMulticastLock) {
+ mdnsClient = new MdnsSocketClient(mContext, mockMulticastLock) {
@Override
MdnsSocket createMdnsSocket(int port) {
if (port == MdnsConstants.MDNS_PORT) {
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java b/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java
new file mode 100644
index 0000000..2bb61a6a
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java
@@ -0,0 +1,289 @@
+/*
+ * Copyright (C) 2022 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.mdns;
+
+import static com.android.testutils.ContextUtils.mockService;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.ConnectivityManager.NetworkCallback;
+import android.net.INetd;
+import android.net.LinkAddress;
+import android.net.LinkProperties;
+import android.net.Network;
+import android.net.TetheringManager;
+import android.net.TetheringManager.TetheringEventCallback;
+import android.os.Build;
+import android.os.Handler;
+import android.os.HandlerThread;
+
+import com.android.net.module.util.ArrayTrackRecord;
+import com.android.server.connectivity.mdns.MdnsSocketProvider.Dependencies;
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRunner;
+import com.android.testutils.HandlerUtils;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
+
+@RunWith(DevSdkIgnoreRunner.class)
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.S_V2)
+public class MdnsSocketProviderTest {
+ private static final String TEST_IFACE_NAME = "test";
+ private static final String LOCAL_ONLY_IFACE_NAME = "local_only";
+ private static final String TETHERED_IFACE_NAME = "tethered";
+ private static final long DEFAULT_TIMEOUT = 2000L;
+ private static final long NO_CALLBACK_TIMEOUT = 200L;
+ private static final LinkAddress LINKADDRV4 = new LinkAddress("192.0.2.0/24");
+ private static final LinkAddress LINKADDRV6 =
+ new LinkAddress("2001:0db8:85a3:0000:0000:8a2e:0370:7334/64");
+ private static final Network TEST_NETWORK = new Network(123);
+ private static final Network LOCAL_NETWORK = new Network(INetd.LOCAL_NET_ID);
+
+ @Mock private Context mContext;
+ @Mock private Dependencies mDeps;
+ @Mock private ConnectivityManager mCm;
+ @Mock private TetheringManager mTm;
+ @Mock private NetworkInterfaceWrapper mTestNetworkIfaceWrapper;
+ @Mock private NetworkInterfaceWrapper mLocalOnlyIfaceWrapper;
+ @Mock private NetworkInterfaceWrapper mTetheredIfaceWrapper;
+ private Handler mHandler;
+ private MdnsSocketProvider mSocketProvider;
+ private NetworkCallback mNetworkCallback;
+ private TetheringEventCallback mTetheringEventCallback;
+
+ @Before
+ public void setUp() throws IOException {
+ MockitoAnnotations.initMocks(this);
+ mockService(mContext, ConnectivityManager.class, Context.CONNECTIVITY_SERVICE, mCm);
+ mockService(mContext, TetheringManager.class, Context.TETHERING_SERVICE, mTm);
+ doReturn(true).when(mDeps).canScanOnInterface(any());
+ doReturn(mTestNetworkIfaceWrapper).when(mDeps).getNetworkInterfaceByName(TEST_IFACE_NAME);
+ doReturn(mLocalOnlyIfaceWrapper).when(mDeps)
+ .getNetworkInterfaceByName(LOCAL_ONLY_IFACE_NAME);
+ doReturn(mTetheredIfaceWrapper).when(mDeps).getNetworkInterfaceByName(TETHERED_IFACE_NAME);
+ doReturn(mock(MdnsInterfaceSocket.class))
+ .when(mDeps).createMdnsInterfaceSocket(any(), anyInt());
+ final HandlerThread thread = new HandlerThread("MdnsSocketProviderTest");
+ thread.start();
+ mHandler = new Handler(thread.getLooper());
+
+ final ArgumentCaptor<NetworkCallback> nwCallbackCaptor =
+ ArgumentCaptor.forClass(NetworkCallback.class);
+ final ArgumentCaptor<TetheringEventCallback> teCallbackCaptor =
+ ArgumentCaptor.forClass(TetheringEventCallback.class);
+ mSocketProvider = new MdnsSocketProvider(mContext, thread.getLooper(), mDeps);
+ mHandler.post(mSocketProvider::startMonitoringSockets);
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ verify(mCm).registerNetworkCallback(any(), nwCallbackCaptor.capture(), any());
+ verify(mTm).registerTetheringEventCallback(any(), teCallbackCaptor.capture());
+
+ mNetworkCallback = nwCallbackCaptor.getValue();
+ mTetheringEventCallback = teCallbackCaptor.getValue();
+ }
+
+ private class TestSocketCallback implements MdnsSocketProvider.SocketCallback {
+ private class SocketEvent {
+ public final Network mNetwork;
+ public final List<LinkAddress> mAddresses;
+
+ SocketEvent(Network network, List<LinkAddress> addresses) {
+ mNetwork = network;
+ mAddresses = Collections.unmodifiableList(addresses);
+ }
+ }
+
+ private class SocketCreatedEvent extends SocketEvent {
+ SocketCreatedEvent(Network nw, List<LinkAddress> addresses) {
+ super(nw, addresses);
+ }
+ }
+
+ private class InterfaceDestroyedEvent extends SocketEvent {
+ InterfaceDestroyedEvent(Network nw, List<LinkAddress> addresses) {
+ super(nw, addresses);
+ }
+ }
+
+ private class AddressesChangedEvent extends SocketEvent {
+ AddressesChangedEvent(Network nw, List<LinkAddress> addresses) {
+ super(nw, addresses);
+ }
+ }
+
+ private final ArrayTrackRecord<SocketEvent>.ReadHead mHistory =
+ new ArrayTrackRecord<SocketEvent>().newReadHead();
+
+ @Override
+ public void onSocketCreated(Network network, MdnsInterfaceSocket socket,
+ List<LinkAddress> addresses) {
+ mHistory.add(new SocketCreatedEvent(network, addresses));
+ }
+
+ @Override
+ public void onInterfaceDestroyed(Network network, MdnsInterfaceSocket socket) {
+ mHistory.add(new InterfaceDestroyedEvent(network, List.of()));
+ }
+
+ @Override
+ public void onAddressesChanged(Network network, List<LinkAddress> addresses) {
+ mHistory.add(new AddressesChangedEvent(network, addresses));
+ }
+
+ public void expectedSocketCreatedForNetwork(Network network, List<LinkAddress> addresses) {
+ final SocketEvent event = mHistory.poll(DEFAULT_TIMEOUT, c -> true);
+ assertNotNull(event);
+ assertTrue(event instanceof SocketCreatedEvent);
+ assertEquals(network, event.mNetwork);
+ assertEquals(addresses, event.mAddresses);
+ }
+
+ public void expectedInterfaceDestroyedForNetwork(Network network) {
+ final SocketEvent event = mHistory.poll(DEFAULT_TIMEOUT, c -> true);
+ assertNotNull(event);
+ assertTrue(event instanceof InterfaceDestroyedEvent);
+ assertEquals(network, event.mNetwork);
+ }
+
+ public void expectedAddressesChangedForNetwork(Network network,
+ List<LinkAddress> addresses) {
+ final SocketEvent event = mHistory.poll(DEFAULT_TIMEOUT, c -> true);
+ assertNotNull(event);
+ assertTrue(event instanceof AddressesChangedEvent);
+ assertEquals(network, event.mNetwork);
+ assertEquals(event.mAddresses, addresses);
+ }
+
+ public void expectedNoCallback() {
+ final SocketEvent event = mHistory.poll(NO_CALLBACK_TIMEOUT, c -> true);
+ assertNull(event);
+ }
+ }
+
+ @Test
+ public void testSocketRequestAndUnrequestSocket() {
+ final TestSocketCallback testCallback1 = new TestSocketCallback();
+ mHandler.post(() -> mSocketProvider.requestSocket(TEST_NETWORK, testCallback1));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ testCallback1.expectedNoCallback();
+
+ final LinkProperties testLp = new LinkProperties();
+ testLp.setInterfaceName(TEST_IFACE_NAME);
+ testLp.setLinkAddresses(List.of(LINKADDRV4));
+ mHandler.post(() -> mNetworkCallback.onLinkPropertiesChanged(TEST_NETWORK, testLp));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ verify(mTestNetworkIfaceWrapper).getNetworkInterface();
+ testCallback1.expectedSocketCreatedForNetwork(TEST_NETWORK, List.of(LINKADDRV4));
+
+ final TestSocketCallback testCallback2 = new TestSocketCallback();
+ mHandler.post(() -> mSocketProvider.requestSocket(TEST_NETWORK, testCallback2));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ testCallback1.expectedNoCallback();
+ testCallback2.expectedSocketCreatedForNetwork(TEST_NETWORK, List.of(LINKADDRV4));
+
+ final TestSocketCallback testCallback3 = new TestSocketCallback();
+ mHandler.post(() -> mSocketProvider.requestSocket(null /* network */, testCallback3));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ testCallback1.expectedNoCallback();
+ testCallback2.expectedNoCallback();
+ testCallback3.expectedSocketCreatedForNetwork(TEST_NETWORK, List.of(LINKADDRV4));
+
+ mHandler.post(() -> mTetheringEventCallback.onLocalOnlyInterfacesChanged(
+ List.of(LOCAL_ONLY_IFACE_NAME)));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ verify(mLocalOnlyIfaceWrapper).getNetworkInterface();
+ testCallback1.expectedNoCallback();
+ testCallback2.expectedNoCallback();
+ testCallback3.expectedSocketCreatedForNetwork(LOCAL_NETWORK, List.of());
+
+ mHandler.post(() -> mTetheringEventCallback.onTetheredInterfacesChanged(
+ List.of(TETHERED_IFACE_NAME)));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ verify(mTetheredIfaceWrapper).getNetworkInterface();
+ testCallback1.expectedNoCallback();
+ testCallback2.expectedNoCallback();
+ testCallback3.expectedSocketCreatedForNetwork(LOCAL_NETWORK, List.of());
+
+ mHandler.post(() -> mSocketProvider.unrequestSocket(testCallback1));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ testCallback1.expectedNoCallback();
+ testCallback2.expectedNoCallback();
+ testCallback3.expectedNoCallback();
+
+ mHandler.post(() -> mNetworkCallback.onLost(TEST_NETWORK));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ testCallback1.expectedNoCallback();
+ testCallback2.expectedInterfaceDestroyedForNetwork(TEST_NETWORK);
+ testCallback3.expectedInterfaceDestroyedForNetwork(TEST_NETWORK);
+
+ mHandler.post(() -> mTetheringEventCallback.onLocalOnlyInterfacesChanged(List.of()));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ testCallback1.expectedNoCallback();
+ testCallback2.expectedNoCallback();
+ testCallback3.expectedInterfaceDestroyedForNetwork(LOCAL_NETWORK);
+
+ mHandler.post(() -> mSocketProvider.unrequestSocket(testCallback3));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ testCallback1.expectedNoCallback();
+ testCallback2.expectedNoCallback();
+ testCallback3.expectedNoCallback();
+ }
+
+ @Test
+ public void testAddressesChanged() throws Exception {
+ final TestSocketCallback testCallback = new TestSocketCallback();
+ mHandler.post(() -> mSocketProvider.requestSocket(TEST_NETWORK, testCallback));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ testCallback.expectedNoCallback();
+
+ final LinkProperties testLp = new LinkProperties();
+ testLp.setInterfaceName(TEST_IFACE_NAME);
+ testLp.setLinkAddresses(List.of(LINKADDRV4));
+ mHandler.post(() -> mNetworkCallback.onLinkPropertiesChanged(TEST_NETWORK, testLp));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ verify(mTestNetworkIfaceWrapper, times(1)).getNetworkInterface();
+ testCallback.expectedSocketCreatedForNetwork(TEST_NETWORK, List.of(LINKADDRV4));
+
+ final LinkProperties newTestLp = new LinkProperties();
+ newTestLp.setInterfaceName(TEST_IFACE_NAME);
+ newTestLp.setLinkAddresses(List.of(LINKADDRV4, LINKADDRV6));
+ mHandler.post(() -> mNetworkCallback.onLinkPropertiesChanged(TEST_NETWORK, newTestLp));
+ HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+ verify(mTestNetworkIfaceWrapper, times(1)).getNetworkInterface();
+ testCallback.expectedAddressesChangedForNetwork(
+ TEST_NETWORK, List.of(LINKADDRV4, LINKADDRV6));
+ }
+}