| /* |
| * Copyright (C) 2016 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.util; |
| |
| import static android.net.util.PacketReader.DEFAULT_RECV_BUF_SIZE; |
| import static android.system.OsConstants.AF_INET6; |
| import static android.system.OsConstants.IPPROTO_UDP; |
| import static android.system.OsConstants.SOCK_DGRAM; |
| import static android.system.OsConstants.SOCK_NONBLOCK; |
| import static android.system.OsConstants.SOL_SOCKET; |
| import static android.system.OsConstants.SO_SNDTIMEO; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import android.os.Handler; |
| import android.os.HandlerThread; |
| import android.system.ErrnoException; |
| import android.system.Os; |
| import android.system.StructTimeval; |
| |
| import androidx.test.filters.SmallTest; |
| import androidx.test.runner.AndroidJUnit4; |
| |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| import java.io.FileDescriptor; |
| import java.net.DatagramPacket; |
| import java.net.DatagramSocket; |
| import java.net.Inet6Address; |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.SocketException; |
| import java.util.Arrays; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Tests for PacketReader. |
| * |
| * @hide |
| */ |
| @RunWith(AndroidJUnit4.class) |
| @SmallTest |
| public class PacketReaderTest { |
| static final InetAddress LOOPBACK6 = Inet6Address.getLoopbackAddress(); |
| static final StructTimeval TIMEO = StructTimeval.fromMillis(500); |
| |
| protected CountDownLatch mLatch; |
| protected FileDescriptor mLocalSocket; |
| protected InetSocketAddress mLocalSockName; |
| protected byte[] mLastRecvBuf; |
| protected boolean mStopped; |
| protected HandlerThread mHandlerThread; |
| protected PacketReader mReceiver; |
| |
| class UdpLoopbackReader extends PacketReader { |
| public UdpLoopbackReader(Handler h) { |
| super(h); |
| } |
| |
| @Override |
| protected FileDescriptor createFd() { |
| FileDescriptor s = null; |
| try { |
| s = Os.socket(AF_INET6, SOCK_DGRAM | SOCK_NONBLOCK, IPPROTO_UDP); |
| Os.bind(s, LOOPBACK6, 0); |
| mLocalSockName = (InetSocketAddress) Os.getsockname(s); |
| Os.setsockoptTimeval(s, SOL_SOCKET, SO_SNDTIMEO, TIMEO); |
| } catch (ErrnoException|SocketException e) { |
| closeFd(s); |
| fail(); |
| return null; |
| } |
| |
| mLocalSocket = s; |
| return s; |
| } |
| |
| @Override |
| protected void handlePacket(byte[] recvbuf, int length) { |
| mLastRecvBuf = Arrays.copyOf(recvbuf, length); |
| mLatch.countDown(); |
| } |
| |
| @Override |
| protected void onStart() { |
| mStopped = false; |
| mLatch.countDown(); |
| } |
| |
| @Override |
| protected void onStop() { |
| mStopped = true; |
| mLatch.countDown(); |
| } |
| }; |
| |
| @Before |
| public void setUp() { |
| resetLatch(); |
| mLocalSocket = null; |
| mLocalSockName = null; |
| mLastRecvBuf = null; |
| mStopped = false; |
| |
| mHandlerThread = new HandlerThread(PacketReaderTest.class.getSimpleName()); |
| mHandlerThread.start(); |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| if (mReceiver != null) { |
| mHandlerThread.getThreadHandler().post(() -> { mReceiver.stop(); }); |
| waitForActivity(); |
| } |
| mReceiver = null; |
| mHandlerThread.quit(); |
| mHandlerThread = null; |
| } |
| |
| void resetLatch() { mLatch = new CountDownLatch(1); } |
| |
| void waitForActivity() throws Exception { |
| try { |
| mLatch.await(1000, TimeUnit.MILLISECONDS); |
| } finally { |
| resetLatch(); |
| } |
| } |
| |
| void sendPacket(byte[] contents) throws Exception { |
| final DatagramSocket sender = new DatagramSocket(); |
| sender.connect(mLocalSockName); |
| sender.send(new DatagramPacket(contents, contents.length)); |
| sender.close(); |
| } |
| |
| @Test |
| public void testBasicWorking() throws Exception { |
| final Handler h = mHandlerThread.getThreadHandler(); |
| mReceiver = new UdpLoopbackReader(h); |
| |
| h.post(() -> { mReceiver.start(); }); |
| waitForActivity(); |
| assertTrue(mLocalSockName != null); |
| assertEquals(LOOPBACK6, mLocalSockName.getAddress()); |
| assertTrue(0 < mLocalSockName.getPort()); |
| assertTrue(mLocalSocket != null); |
| assertFalse(mStopped); |
| |
| final byte[] one = "one 1".getBytes("UTF-8"); |
| sendPacket(one); |
| waitForActivity(); |
| assertEquals(1, mReceiver.numPacketsReceived()); |
| assertTrue(Arrays.equals(one, mLastRecvBuf)); |
| assertFalse(mStopped); |
| |
| final byte[] two = "two 2".getBytes("UTF-8"); |
| sendPacket(two); |
| waitForActivity(); |
| assertEquals(2, mReceiver.numPacketsReceived()); |
| assertTrue(Arrays.equals(two, mLastRecvBuf)); |
| assertFalse(mStopped); |
| |
| mReceiver.stop(); |
| waitForActivity(); |
| assertEquals(2, mReceiver.numPacketsReceived()); |
| assertTrue(Arrays.equals(two, mLastRecvBuf)); |
| assertTrue(mStopped); |
| mReceiver = null; |
| } |
| |
| class NullPacketReader extends PacketReader { |
| public NullPacketReader(Handler h, int recvbufsize) { |
| super(h, recvbufsize); |
| } |
| |
| @Override |
| public FileDescriptor createFd() { return null; } |
| } |
| |
| @Test |
| public void testMinimalRecvBufSize() throws Exception { |
| final Handler h = mHandlerThread.getThreadHandler(); |
| |
| for (int i : new int[]{-1, 0, 1, DEFAULT_RECV_BUF_SIZE-1}) { |
| final PacketReader b = new NullPacketReader(h, i); |
| assertEquals(DEFAULT_RECV_BUF_SIZE, b.recvBufSize()); |
| } |
| } |
| } |