Merge "Add VcnUtils to easily get WifiInfo and subId from NetworkCapabilities"... (c595ed6a) · Commits · e / os / android_frameworks_base

core/java/android/net/vcn/VcnTransportInfo.java

+43 −0

Original line number	Diff line number	Diff line
		@@ -17,9 +17,11 @@
		package android.net.vcn;

		import static android.net.NetworkCapabilities.REDACT_FOR_NETWORK_SETTINGS;
		import static android.net.vcn.VcnGatewayConnectionConfig.MIN_UDP_PORT_4500_NAT_TIMEOUT_SECONDS;
		import static android.net.vcn.VcnGatewayConnectionConfig.MIN_UDP_PORT_4500_NAT_TIMEOUT_UNSET;
		import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;

		import android.annotation.IntRange;
		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.net.NetworkCapabilities;
		@@ -29,6 +31,8 @@ import android.os.Parcel;
		import android.os.Parcelable;
		import android.telephony.SubscriptionManager;

		import com.android.internal.util.Preconditions;

		import java.util.Objects;

		/**
		@@ -47,6 +51,7 @@ import java.util.Objects;
		*
		* @hide
		*/
		// TODO: Do not store WifiInfo and subscription ID in VcnTransportInfo anymore
		public class VcnTransportInfo implements TransportInfo, Parcelable {
		@Nullable private final WifiInfo mWifiInfo;
		private final int mSubId;
		@@ -195,4 +200,42 @@ public class VcnTransportInfo implements TransportInfo, Parcelable {
		return new VcnTransportInfo[size];
		}
		};

		/** This class can be used to construct a {@link VcnTransportInfo}. */
		public static final class Builder {
		private int mMinUdpPort4500NatTimeoutSeconds = MIN_UDP_PORT_4500_NAT_TIMEOUT_UNSET;

		/** Construct Builder */
		public Builder() {}

		/**
		* Sets the maximum supported IKEv2/IPsec NATT keepalive timeout.
		*
		* <p>This is used as a power-optimization hint for other IKEv2/IPsec use cases (e.g. VPNs,
		* or IWLAN) to reduce the necessary keepalive frequency, thus conserving power and data.
		*
		* @param minUdpPort4500NatTimeoutSeconds the maximum keepalive timeout supported by the VCN
		* Gateway Connection, generally the minimum duration a NAT mapping is cached on the VCN
		* Gateway.
		* @return this {@link Builder} instance, for chaining
		*/
		@NonNull
		public Builder setMinUdpPort4500NatTimeoutSeconds(
		@IntRange(from = MIN_UDP_PORT_4500_NAT_TIMEOUT_SECONDS)
		int minUdpPort4500NatTimeoutSeconds) {
		Preconditions.checkArgument(
		minUdpPort4500NatTimeoutSeconds >= MIN_UDP_PORT_4500_NAT_TIMEOUT_SECONDS,
		"Timeout must be at least 120s");

		mMinUdpPort4500NatTimeoutSeconds = minUdpPort4500NatTimeoutSeconds;
		return Builder.this;
		}

		/** Build a VcnTransportInfo instance */
		@NonNull
		public VcnTransportInfo build() {
		return new VcnTransportInfo(
		null /* wifiInfo */, INVALID_SUBSCRIPTION_ID, mMinUdpPort4500NatTimeoutSeconds);
		}
		}
		}

core/java/android/net/vcn/VcnUtils.java

0 → 100644

+97 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2024 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		package android.net.vcn;

		import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;

		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.net.ConnectivityManager;
		import android.net.Network;
		import android.net.NetworkCapabilities;
		import android.net.NetworkSpecifier;
		import android.net.TelephonyNetworkSpecifier;
		import android.net.TransportInfo;
		import android.net.wifi.WifiInfo;

		import java.util.List;

		/**
		* Utility class for VCN callers get information from VCN network
		*
		* @hide
		*/
		public class VcnUtils {
		/** Get the WifiInfo of the VCN's underlying WiFi network */
		@Nullable
		public static WifiInfo getWifiInfoFromVcnCaps(
		@NonNull ConnectivityManager connectivityMgr,
		@NonNull NetworkCapabilities networkCapabilities) {
		final NetworkCapabilities underlyingCaps =
		getVcnUnderlyingCaps(connectivityMgr, networkCapabilities);

		if (underlyingCaps == null) {
		return null;
		}

		final TransportInfo underlyingTransportInfo = underlyingCaps.getTransportInfo();
		if (!(underlyingTransportInfo instanceof WifiInfo)) {
		return null;
		}

		return (WifiInfo) underlyingTransportInfo;
		}

		/** Get the subscription ID of the VCN's underlying Cell network */
		public static int getSubIdFromVcnCaps(
		@NonNull ConnectivityManager connectivityMgr,
		@NonNull NetworkCapabilities networkCapabilities) {
		final NetworkCapabilities underlyingCaps =
		getVcnUnderlyingCaps(connectivityMgr, networkCapabilities);

		if (underlyingCaps == null) {
		return INVALID_SUBSCRIPTION_ID;
		}

		final NetworkSpecifier underlyingNetworkSpecifier = underlyingCaps.getNetworkSpecifier();
		if (!(underlyingNetworkSpecifier instanceof TelephonyNetworkSpecifier)) {
		return INVALID_SUBSCRIPTION_ID;
		}

		return ((TelephonyNetworkSpecifier) underlyingNetworkSpecifier).getSubscriptionId();
		}

		@Nullable
		private static NetworkCapabilities getVcnUnderlyingCaps(
		@NonNull ConnectivityManager connectivityMgr,
		@NonNull NetworkCapabilities networkCapabilities) {
		// Return null if it is not a VCN network
		if (networkCapabilities.getTransportInfo() == null
		\|\| !(networkCapabilities.getTransportInfo() instanceof VcnTransportInfo)) {
		return null;
		}

		// As of Android 16, VCN has one underlying network, and only one. If there are more
		// than one networks due to future changes in the VCN mainline code, just take the first
		// network
		final List<Network> underlyingNws = networkCapabilities.getUnderlyingNetworks();
		if (underlyingNws == null) {
		return null;
		}

		return connectivityMgr.getNetworkCapabilities(underlyingNws.get(0));
		}
		}

tests/vcn/java/android/net/vcn/VcnTransportInfoTest.java

+23 −0

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@ import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
		import static org.junit.Assert.assertEquals;
		import static org.junit.Assert.assertNotEquals;
		import static org.junit.Assert.assertNull;
		import static org.junit.Assert.fail;

		import android.net.NetworkCapabilities;
		import android.net.wifi.WifiConfiguration;
		@@ -39,6 +40,7 @@ public class VcnTransportInfoTest {
		private static final int SUB_ID = 1;
		private static final int NETWORK_ID = 5;
		private static final int MIN_UDP_PORT_4500_NAT_TIMEOUT = 120;
		private static final int MIN_UDP_PORT_4500_NAT_TIMEOUT_INVALID = 119;
		private static final WifiInfo WIFI_INFO =
		new WifiInfo.Builder().setNetworkId(NETWORK_ID).build();

		@@ -47,6 +49,27 @@ public class VcnTransportInfoTest {
		private static final VcnTransportInfo WIFI_UNDERLYING_INFO =
		new VcnTransportInfo(WIFI_INFO, MIN_UDP_PORT_4500_NAT_TIMEOUT);

		@Test
		public void testBuilder() {
		final VcnTransportInfo transportInfo =
		new VcnTransportInfo.Builder()
		.setMinUdpPort4500NatTimeoutSeconds(MIN_UDP_PORT_4500_NAT_TIMEOUT)
		.build();

		assertEquals(
		MIN_UDP_PORT_4500_NAT_TIMEOUT, transportInfo.getMinUdpPort4500NatTimeoutSeconds());
		}

		@Test
		public void testBuilder_withInvalidNatTimeout() {
		try {
		new VcnTransportInfo.Builder()
		.setMinUdpPort4500NatTimeoutSeconds(MIN_UDP_PORT_4500_NAT_TIMEOUT_INVALID);
		fail("Expected to fail due to invalid NAT timeout");
		} catch (Exception expected) {
		}
		}

		@Test
		public void testGetWifiInfo() {
		assertEquals(WIFI_INFO, WIFI_UNDERLYING_INFO.getWifiInfo());

tests/vcn/java/android/net/vcn/VcnUtilsTest.java

0 → 100644

+136 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2021 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package android.net.vcn;

		import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
		import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
		import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;

		import static org.junit.Assert.assertEquals;
		import static org.junit.Assert.assertNull;
		import static org.mockito.Mockito.mock;
		import static org.mockito.Mockito.when;

		import android.net.ConnectivityManager;
		import android.net.Network;
		import android.net.NetworkCapabilities;
		import android.net.TelephonyNetworkSpecifier;
		import android.net.wifi.WifiInfo;

		import org.junit.Before;
		import org.junit.Test;

		import java.util.Arrays;
		import java.util.Collections;

		public class VcnUtilsTest {
		private static final int SUB_ID = 1;

		private static final WifiInfo WIFI_INFO = new WifiInfo.Builder().build();
		private static final TelephonyNetworkSpecifier TEL_NETWORK_SPECIFIER =
		new TelephonyNetworkSpecifier.Builder().setSubscriptionId(SUB_ID).build();
		private static final VcnTransportInfo VCN_TRANSPORT_INFO =
		new VcnTransportInfo.Builder().build();

		private ConnectivityManager mMockConnectivityManager;
		private Network mMockWifiNetwork;
		private Network mMockCellNetwork;

		private NetworkCapabilities mVcnCapsWithUnderlyingWifi;
		private NetworkCapabilities mVcnCapsWithUnderlyingCell;

		@Before
		public void setUp() {
		mMockConnectivityManager = mock(ConnectivityManager.class);

		mMockWifiNetwork = mock(Network.class);
		mVcnCapsWithUnderlyingWifi = newVcnCaps(VCN_TRANSPORT_INFO, mMockWifiNetwork);
		final NetworkCapabilities wifiCaps =
		new NetworkCapabilities.Builder()
		.addTransportType(TRANSPORT_WIFI)
		.setTransportInfo(WIFI_INFO)
		.build();
		when(mMockConnectivityManager.getNetworkCapabilities(mMockWifiNetwork))
		.thenReturn(wifiCaps);

		mMockCellNetwork = mock(Network.class);
		mVcnCapsWithUnderlyingCell = newVcnCaps(VCN_TRANSPORT_INFO, mMockCellNetwork);
		final NetworkCapabilities cellCaps =
		new NetworkCapabilities.Builder()
		.addTransportType(TRANSPORT_CELLULAR)
		.setNetworkSpecifier(TEL_NETWORK_SPECIFIER)
		.build();
		when(mMockConnectivityManager.getNetworkCapabilities(mMockCellNetwork))
		.thenReturn(cellCaps);
		}

		private static NetworkCapabilities newVcnCaps(
		VcnTransportInfo vcnTransportInfo, Network underlyingNetwork) {
		return new NetworkCapabilities.Builder()
		.setTransportInfo(vcnTransportInfo)
		.setUnderlyingNetworks(Collections.singletonList(underlyingNetwork))
		.build();
		}

		@Test
		public void getWifiInfoFromVcnCaps() {
		assertEquals(
		WIFI_INFO,
		VcnUtils.getWifiInfoFromVcnCaps(
		mMockConnectivityManager, mVcnCapsWithUnderlyingWifi));
		}

		@Test
		public void getWifiInfoFromVcnCaps_onVcnWithUnderlyingCell() {
		assertNull(
		VcnUtils.getWifiInfoFromVcnCaps(
		mMockConnectivityManager, mVcnCapsWithUnderlyingCell));
		}

		@Test
		public void getSubIdFromVcnCaps() {
		assertEquals(
		SUB_ID,
		VcnUtils.getSubIdFromVcnCaps(mMockConnectivityManager, mVcnCapsWithUnderlyingCell));
		}

		@Test
		public void getSubIdFromVcnCaps_onVcnWithUnderlyingWifi() {
		assertEquals(
		INVALID_SUBSCRIPTION_ID,
		VcnUtils.getSubIdFromVcnCaps(mMockConnectivityManager, mVcnCapsWithUnderlyingWifi));
		}

		@Test
		public void getSubIdFromVcnCaps_onNonVcnNetwork() {
		assertEquals(
		INVALID_SUBSCRIPTION_ID,
		VcnUtils.getSubIdFromVcnCaps(
		mMockConnectivityManager, new NetworkCapabilities.Builder().build()));
		}

		@Test
		public void getSubIdFromVcnCaps_withMultipleUnderlyingNetworks() {
		final NetworkCapabilities vcnCaps =
		new NetworkCapabilities.Builder(mVcnCapsWithUnderlyingCell)
		.setUnderlyingNetworks(
		Arrays.asList(
		new Network[] {mMockCellNetwork, mock(Network.class)}))
		.build();
		assertEquals(SUB_ID, VcnUtils.getSubIdFromVcnCaps(mMockConnectivityManager, vcnCaps));
		}
		}