| /* |
| * Copyright (C) 2010 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 tests.net; |
| |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import java.util.ArrayList; |
| |
| /** |
| * A test ServerSocket that you can't connect to --- connects will time out. |
| */ |
| public final class StuckServer { |
| private static final boolean DEBUG = false; |
| |
| private ServerSocket serverSocket; |
| private InetSocketAddress address; |
| private ArrayList<Socket> clients = new ArrayList<Socket>(); |
| |
| public StuckServer(boolean useBacklog) throws IOException { |
| // Set a backlog and use it up so that we can expect the |
| // connection to time out. According to Stevens |
| // 4.5 "listen function", Linux adds 3 to the specified |
| // backlog, so we need to connect 4 times before it will hang. |
| // The trouble with this is that it won't hang forever. |
| // After 10s or so, the kernel allows a couple more connections. |
| // This mode is ony useful if you actually want to continue eventually; we use it to |
| // test non-blocking connects, for example, where you want to test every part of the code. |
| if (useBacklog) { |
| this.serverSocket = new ServerSocket(0, 1); |
| this.address = (InetSocketAddress) serverSocket.getLocalSocketAddress(); |
| if (DEBUG) { |
| System.err.println("StuckServer: " + serverSocket); |
| } |
| for (int i = 0; i < 4; ++i) { |
| Socket client = new Socket(serverSocket.getInetAddress(), serverSocket.getLocalPort()); |
| clients.add(client); |
| if (DEBUG) { |
| System.err.println("StuckServer client " + i + " - " + client); |
| } |
| } |
| } else { |
| // In general, though, you don't want to rely on listen(2) backlog. http://b/6971145. |
| // RFC 5737 implies this network will be unreachable. (There are two other networks |
| // to try if we have trouble with this one.) |
| // We've had trouble with 10.* in the past (because test labs running CTS often use |
| // net 10!) but hopefully this network will be better. |
| InetAddress testNet1 = InetAddress.getByAddress(new byte[] { (byte) 192, 0, 2, 0 }); |
| this.address = new InetSocketAddress(testNet1, 80); |
| } |
| } |
| |
| public InetSocketAddress getLocalSocketAddress() { |
| return address; |
| } |
| |
| public int getLocalPort() { |
| return address.getPort(); |
| } |
| |
| public void close() throws IOException { |
| if (serverSocket != null) { |
| serverSocket.close(); |
| } |
| for (Socket client : clients) { |
| client.close(); |
| } |
| } |
| } |