| /* |
| * Copyright (C) 2009 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 libcore.javax.net; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import javax.net.ServerSocketFactory; |
| import junit.framework.TestCase; |
| |
| public class ServerSocketFactoryTest extends TestCase { |
| |
| public void testCreateServerSocket() throws IOException { |
| ServerSocket serverSocket = ServerSocketFactory.getDefault().createServerSocket(); |
| serverSocket.bind(new InetSocketAddress(0)); |
| testSocket(serverSocket, 50); |
| } |
| |
| public void testCreateServerSocketWithPort() throws IOException { |
| ServerSocket serverSocket = ServerSocketFactory.getDefault().createServerSocket(0); |
| testSocket(serverSocket, 50); |
| } |
| |
| public void testCreateServerSocketWithPortNoBacklog() throws IOException { |
| ServerSocket serverSocket = ServerSocketFactory.getDefault().createServerSocket(0, 1); |
| testSocket(serverSocket, 1); |
| } |
| |
| public void testCreateServerSocketWithPortZeroBacklog() throws IOException { |
| ServerSocket serverSocket = ServerSocketFactory.getDefault().createServerSocket(0, 0); |
| testSocket(serverSocket, 50); |
| } |
| |
| public void testCreateServerSocketWithPortAndBacklog() throws IOException { |
| ServerSocket serverSocket = ServerSocketFactory.getDefault().createServerSocket(0, 50); |
| testSocket(serverSocket, 50); |
| } |
| |
| private void testSocket(final ServerSocket serverSocket, int specifiedBacklog) |
| throws IOException { |
| final byte[] data = "abc".getBytes(); |
| |
| new Thread(new Runnable() { |
| public void run() { |
| try { |
| Socket s = serverSocket.accept(); |
| s.getOutputStream().write(data); |
| s.close(); |
| } catch (IOException e) { |
| } |
| } |
| }).start(); |
| |
| Socket socket = new Socket(InetAddress.getLocalHost(), serverSocket.getLocalPort()); |
| assertBacklog(specifiedBacklog, new InetSocketAddress( |
| InetAddress.getLocalHost(), serverSocket.getLocalPort())); |
| |
| InputStream in = socket.getInputStream(); |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| transfer(in, out); |
| assertEquals(Arrays.toString(data), Arrays.toString(out.toByteArray())); |
| socket.close(); |
| |
| serverSocket.close(); |
| } |
| |
| /** |
| * Validates that the backlog of the listening address is as specified. |
| */ |
| private void assertBacklog(int specifiedBacklog, InetSocketAddress serverAddress) |
| throws IOException { |
| List<Socket> backlog = new ArrayList<Socket>(); |
| int peak = 0; |
| try { |
| int max = 100; |
| for (int i = 0; i < max; i++) { |
| Socket socket = new Socket(); |
| backlog.add(socket); |
| socket.connect(serverAddress, 500); |
| peak++; |
| } |
| fail("Failed to exhaust backlog after " + max + " connections!"); |
| } catch (IOException expected) { |
| } |
| |
| System.out.println("backlog peaked at " + peak); |
| |
| for (Socket socket : backlog) { |
| socket.close(); |
| } |
| |
| /* |
| * In 4.5 of UNIX Network Programming, Stevens says: |
| * "Berkeley-derived implementations add a fudge factor to the |
| * backlog: it is multiplied by 1.5." |
| * |
| * We've observed that Linux always adds 3 to the user-specified |
| * backlog. |
| */ |
| assertTrue(peak >= specifiedBacklog && peak <= (specifiedBacklog + 3) * 1.5); |
| } |
| |
| private void transfer(InputStream in, ByteArrayOutputStream out) throws IOException { |
| byte[] buffer = new byte[1024]; |
| int count; |
| while ((count = in.read(buffer)) != -1) { |
| out.write(buffer, 0, count); |
| } |
| } |
| } |