| /* |
| * Copyright (C) 2020 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.testutils |
| |
| import android.content.Context |
| import android.net.ConnectivityManager |
| import android.net.ConnectivityManager.NetworkCallback |
| import android.net.LinkAddress |
| import android.net.Network |
| import android.net.NetworkCapabilities |
| import android.net.NetworkRequest |
| import android.net.TestNetworkInterface |
| import android.net.TestNetworkManager |
| import android.os.Binder |
| import com.android.modules.utils.build.SdkLevel.isAtLeastS |
| import java.util.concurrent.CompletableFuture |
| import java.util.concurrent.TimeUnit |
| |
| /** |
| * Create a test network based on a TUN interface with a LinkAddress. |
| * |
| * This method will block until the test network is available. Requires |
| * [android.Manifest.permission.CHANGE_NETWORK_STATE] and |
| * [android.Manifest.permission.MANAGE_TEST_NETWORKS]. |
| */ |
| fun initTestNetwork( |
| context: Context, |
| interfaceAddr: LinkAddress, |
| setupTimeoutMs: Long = 10_000L |
| ): TestNetworkTracker { |
| return initTestNetwork(context, listOf(interfaceAddr), setupTimeoutMs) |
| } |
| |
| /** |
| * Create a test network based on a TUN interface with giving LinkAddress list. |
| * |
| * This method will block until the test network is available. Requires |
| * [android.Manifest.permission.CHANGE_NETWORK_STATE] and |
| * [android.Manifest.permission.MANAGE_TEST_NETWORKS]. |
| */ |
| fun initTestNetwork( |
| context: Context, |
| linkAddrs: List<LinkAddress>, |
| setupTimeoutMs: Long = 10_000L |
| ): TestNetworkTracker { |
| val tnm = context.getSystemService(TestNetworkManager::class.java) |
| val iface = if (isAtLeastS()) tnm.createTunInterface(linkAddrs) |
| else tnm.createTunInterface(linkAddrs.toTypedArray()) |
| return TestNetworkTracker(context, iface, tnm, setupTimeoutMs) |
| } |
| |
| /** |
| * Utility class to create and track test networks. |
| * |
| * This class is not thread-safe. |
| */ |
| class TestNetworkTracker internal constructor( |
| val context: Context, |
| val iface: TestNetworkInterface, |
| val tnm: TestNetworkManager, |
| setupTimeoutMs: Long |
| ) { |
| private val cm = context.getSystemService(ConnectivityManager::class.java) |
| private val binder = Binder() |
| |
| private val networkCallback: NetworkCallback |
| val network: Network |
| val testIface: TestNetworkInterface |
| |
| init { |
| val networkFuture = CompletableFuture<Network>() |
| val networkRequest = NetworkRequest.Builder() |
| .addTransportType(NetworkCapabilities.TRANSPORT_TEST) |
| // Test networks do not have NOT_VPN or TRUSTED capabilities by default |
| .removeCapability(NetworkCapabilities.NET_CAPABILITY_NOT_VPN) |
| .removeCapability(NetworkCapabilities.NET_CAPABILITY_TRUSTED) |
| .setNetworkSpecifier(CompatUtil.makeTestNetworkSpecifier(iface.interfaceName)) |
| .build() |
| networkCallback = object : NetworkCallback() { |
| override fun onAvailable(network: Network) { |
| networkFuture.complete(network) |
| } |
| } |
| cm.requestNetwork(networkRequest, networkCallback) |
| |
| try { |
| tnm.setupTestNetwork(iface.interfaceName, binder) |
| network = networkFuture.get(setupTimeoutMs, TimeUnit.MILLISECONDS) |
| } catch (e: Throwable) { |
| teardown() |
| throw e |
| } |
| |
| testIface = iface |
| } |
| |
| fun teardown() { |
| cm.unregisterNetworkCallback(networkCallback) |
| tnm.teardownTestNetwork(network) |
| } |
| } |