Add NetworkStack app (c094a540) · Commits · e / os / android_frameworks_base

Android.bp

+11 −0

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		@@ -679,6 +679,7 @@ java_defaults {

		static_libs: [
		"apex_aidl_interface-java",
		"networkstack-aidl-interfaces-java",
		"framework-protos",
		"android.hidl.base-V1.0-java",
		"android.hardware.cas-V1.0-java",
		@@ -818,6 +819,16 @@ gensrcs {
		output_extension: "srcjar",
		}

		// AIDL interfaces between the core system and the networking mainline module.
		aidl_interface {
		name: "networkstack-aidl-interfaces",
		local_include_dir: "core/java",
		srcs: [
		"core/java/android/net/INetworkStackConnector.aidl",
		],
		api_dir: "aidl/networkstack",
		}

		// Build ext.jar
		// ============================================================
		java_library {

core/java/android/app/SystemServiceRegistry.java

+8 −0

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		@@ -87,6 +87,7 @@ import android.net.INetworkPolicyManager;
		import android.net.IpSecManager;
		import android.net.NetworkPolicyManager;
		import android.net.NetworkScoreManager;
		import android.net.NetworkStack;
		import android.net.NetworkWatchlistManager;
		import android.net.lowpan.ILowpanManager;
		import android.net.lowpan.LowpanManager;
		@@ -283,6 +284,13 @@ final class SystemServiceRegistry {
		return new ConnectivityManager(context, service);
		}});

		registerService(Context.NETWORK_STACK_SERVICE, NetworkStack.class,
		new StaticServiceFetcher<NetworkStack>() {
		@Override
		public NetworkStack createService() {
		return new NetworkStack();
		}});

		registerService(Context.IPSEC_SERVICE, IpSecManager.class,
		new CachedServiceFetcher<IpSecManager>() {
		@Override

core/java/android/content/Context.java

+10 −0

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		@@ -49,6 +49,7 @@ import android.database.sqlite.SQLiteDatabase;
		import android.database.sqlite.SQLiteDatabase.CursorFactory;
		import android.graphics.Bitmap;
		import android.graphics.drawable.Drawable;
		import android.net.NetworkStack;
		import android.net.Uri;
		import android.os.Build;
		import android.os.Bundle;
		@@ -3502,6 +3503,15 @@ public abstract class Context {
		*/
		public static final String CONNECTIVITY_SERVICE = "connectivity";

		/**
		* Use with {@link #getSystemService(String)} to retrieve a
		* {@link NetworkStack} for communicating with the network stack
		* @hide
		* @see #getSystemService(String)
		* @see NetworkStack
		*/
		public static final String NETWORK_STACK_SERVICE = "network_stack";

		/**
		* Use with {@link #getSystemService(String)} to retrieve a
		* {@link android.net.IpSecManager} for encrypting Sockets or Networks with

core/java/android/net/INetworkStackConnector.aidl

0 → 100644

+21 −0

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		/**
		* Copyright (c) 2018, 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 perNmissions and
		* limitations under the License.
		*/
		package android.net;

		/** @hide */
		oneway interface INetworkStackConnector {
		// TODO: requestDhcpServer(), etc. will go here
		}
		No newline at end of file

core/java/android/net/NetworkStack.java

0 → 100644

+156 −0

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		/*
		* Copyright (C) 2018 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;

		import static android.os.IServiceManager.DUMP_FLAG_PRIORITY_HIGH;
		import static android.os.IServiceManager.DUMP_FLAG_PRIORITY_NORMAL;

		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.annotation.SystemService;
		import android.content.ComponentName;
		import android.content.Context;
		import android.content.Intent;
		import android.content.ServiceConnection;
		import android.os.Binder;
		import android.os.IBinder;
		import android.os.Process;
		import android.os.ServiceManager;
		import android.os.UserHandle;
		import android.util.Slog;

		import com.android.internal.annotations.GuardedBy;

		import java.lang.reflect.InvocationTargetException;
		import java.util.ArrayList;

		/**
		* Service used to communicate with the network stack, which is running in a separate module.
		* @hide
		*/
		@SystemService(Context.NETWORK_STACK_SERVICE)
		public class NetworkStack {
		private static final String TAG = NetworkStack.class.getSimpleName();

		@NonNull
		@GuardedBy("mPendingNetStackRequests")
		private final ArrayList<NetworkStackRequest> mPendingNetStackRequests = new ArrayList<>();
		@Nullable
		@GuardedBy("mPendingNetStackRequests")
		private INetworkStackConnector mConnector;

		private interface NetworkStackRequest {
		void onNetworkStackConnected(INetworkStackConnector connector);
		}

		public NetworkStack() { }

		private class NetworkStackConnection implements ServiceConnection {
		@Override
		public void onServiceConnected(ComponentName name, IBinder service) {
		registerNetworkStackService(service);
		}

		@Override
		public void onServiceDisconnected(ComponentName name) {
		// TODO: crash/reboot the system ?
		Slog.wtf(TAG, "Lost network stack connector");
		}
		};

		private void registerNetworkStackService(@NonNull IBinder service) {
		final INetworkStackConnector connector = INetworkStackConnector.Stub.asInterface(service);

		ServiceManager.addService(Context.NETWORK_STACK_SERVICE, service, false /* allowIsolated */,
		DUMP_FLAG_PRIORITY_HIGH \| DUMP_FLAG_PRIORITY_NORMAL);

		final ArrayList<NetworkStackRequest> requests;
		synchronized (mPendingNetStackRequests) {
		requests = new ArrayList<>(mPendingNetStackRequests);
		mPendingNetStackRequests.clear();
		mConnector = connector;
		}

		for (NetworkStackRequest r : requests) {
		r.onNetworkStackConnected(connector);
		}
		}

		/**
		* Start the network stack. Should be called only once on device startup.
		*
		* <p>This method will start the network stack either in the network stack process, or inside
		* the system server on devices that do not support the network stack module. The network stack
		* connector will then be delivered asynchronously to clients that requested it before it was
		* started.
		*/
		public void start(Context context) {
		// Try to bind in-process if the library is available
		IBinder connector = null;
		try {
		final Class service = Class.forName(
		"com.android.server.NetworkStackService",
		true /* initialize */,
		context.getClassLoader());
		connector = (IBinder) service.getMethod("makeConnector").invoke(null);
		} catch (NoSuchMethodException \| IllegalAccessException \| InvocationTargetException e) {
		Slog.wtf(TAG, "Could not create network stack connector from NetworkStackService");
		// TODO: crash/reboot system here ?
		return;
		} catch (ClassNotFoundException e) {
		// Normal behavior if stack is provided by the app: fall through
		}

		// In-process network stack. Add the service to the service manager here.
		if (connector != null) {
		registerNetworkStackService(connector);
		return;
		}
		// Start the network stack process. The service will be added to the service manager in
		// NetworkStackConnection.onServiceConnected().
		final Intent intent = new Intent(INetworkStackConnector.class.getName());
		final ComponentName comp = intent.resolveSystemService(context.getPackageManager(), 0);
		intent.setComponent(comp);

		if (comp == null \|\| !context.bindServiceAsUser(intent, new NetworkStackConnection(),
		Context.BIND_AUTO_CREATE \| Context.BIND_IMPORTANT, UserHandle.SYSTEM)) {
		Slog.wtf(TAG,
		"Could not bind to network stack in-process, or in app with " + intent);
		// TODO: crash/reboot system server if no network stack after a timeout ?
		}
		}

		// TODO: use this method to obtain the connector when implementing network stack operations
		private void requestConnector(@NonNull NetworkStackRequest request) {
		// TODO: PID check.
		if (Binder.getCallingUid() != Process.SYSTEM_UID) {
		// Don't even attempt to obtain the connector and give a nice error message
		throw new SecurityException(
		"Only the system server should try to bind to the network stack.");
		}

		final INetworkStackConnector connector;
		synchronized (mPendingNetStackRequests) {
		connector = mConnector;
		if (connector == null) {
		mPendingNetStackRequests.add(request);
		return;
		}
		}

		request.onNetworkStackConnected(connector);
		}
		}