1 /* 2 * Copyright (c) 2000, 2013 Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /** 25 * @test 26 * @bug 4361783 27 * @summary Test to see if ICMP Port Unreachable on non-connected 28 * DatagramSocket causes a SocketException "socket closed" 29 * exception on Windows 2000. 30 */ 31 import java.net.InetAddress; 32 import java.net.DatagramSocket; 33 import java.net.DatagramPacket; 34 35 public class PortUnreachable { 36 37 DatagramSocket clientSock; 38 int serverPort; 39 int clientPort; 40 41 public void serverSend() { 42 try { 43 InetAddress addr = InetAddress.getLocalHost(); 44 Thread.currentThread().sleep(1000); 45 // send a delayed packet which should mean a delayed icmp 46 // port unreachable 47 byte b[] = "A late msg".getBytes(); 48 DatagramPacket packet = new DatagramPacket(b, b.length, addr, 49 serverPort); 50 clientSock.send(packet); 51 52 DatagramSocket sock = new DatagramSocket(serverPort); 53 b = "Greetings from the server".getBytes(); 54 packet = new DatagramPacket(b, b.length, addr, clientPort); 55 sock.send(packet); 56 sock.close(); 57 } catch (Exception e) { 58 e.printStackTrace(); 59 } 60 } 61 62 PortUnreachable() throws Exception { 63 64 clientSock = new DatagramSocket(); 65 clientPort = clientSock.getLocalPort(); 66 67 } 68 69 void execute () throws Exception{ 70 71 // pick a port for the server 72 DatagramSocket sock2 = new DatagramSocket(); 73 serverPort = sock2.getLocalPort(); 74 75 // send a burst of packets to the unbound port - we should get back 76 // icmp port unreachable messages 77 // 78 InetAddress addr = InetAddress.getLocalHost(); 79 byte b[] = "Hello me".getBytes(); 80 DatagramPacket packet = new DatagramPacket(b, b.length, addr, 81 serverPort); 82 //close just before sending 83 sock2.close(); 84 for (int i=0; i<100; i++) 85 clientSock.send(packet); 86 87 serverSend(); 88 // try to receive 89 b = new byte[25]; 90 packet = new DatagramPacket(b, b.length, addr, serverPort); 91 clientSock.setSoTimeout(10000); 92 clientSock.receive(packet); 93 System.out.println("client received data packet " + new String(packet.getData())); 94 95 // done 96 clientSock.close(); 97 } 98 99 public static void main(String[] args) throws Exception { 100 PortUnreachable test = new PortUnreachable(); 101 test.execute(); 102 } 103 104 }