1/* 2 * Copyright (c) 2001, 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 4431020 27 * @summary On Windows 2000 we observed behaviour that reflects the underlying 28 * implementation :- 29 * 1. PortUnreachableException throw per underlying reset 30 * 2. No PUE throw for DatagramSocket.send 31 */ 32import java.net.*; 33 34public class Concurrent implements Runnable { 35 36 DatagramSocket s; 37 38 public void run() { 39 try { 40 byte b[] = new byte[512]; 41 DatagramPacket p = new DatagramPacket(b, b.length); 42 43 int pue_count = 0; 44 while (true) { 45 try { 46 System.out.println("receive..."); 47 s.receive(p); 48 } catch (PortUnreachableException pue) { 49 System.out.println("receive threw PortUnreachableException"); 50 pue_count++; 51 } 52 System.out.println("receiver sleeping"); 53 Thread.currentThread().sleep(100*pue_count); 54 } 55 56 } catch (Exception e) { } 57 } 58 59 Concurrent(InetAddress ia, int port) throws Exception { 60 61 System.out.println(""); 62 System.out.println("***"); 63 System.out.println("Test Description:"); 64 System.out.println(" - Block reader thread on receive"); 65 System.out.println(" - Send datagrams to bad destination with wee pauses"); 66 System.out.println(" - Observe which thread gets the PUE"); 67 System.out.println(""); 68 69 /* 70 * Create the datagram and connect it to destination 71 */ 72 s = new DatagramSocket(); 73 s.connect(ia, port); 74 s.setSoTimeout(60000); 75 76 /* 77 * Start the reader thread 78 */ 79 Thread thr = new Thread(this); 80 thr.start(); 81 Thread.currentThread().sleep(2000); 82 83 byte b[] = new byte[512]; 84 DatagramPacket p = new DatagramPacket(b, b.length); 85 86 /* 87 * Send a bunch of packets to the destination 88 */ 89 for (int i=0; i<10; i++) { 90 try { 91 System.out.println("Sending..."); 92 s.send(p); 93 } catch (PortUnreachableException e) { 94 System.out.println("send threw PortUnreachableException"); 95 } 96 Thread.currentThread().sleep(100); 97 } 98 99 /* 100 * Give time for ICMP port unreachables to return 101 */ 102 Thread.currentThread().sleep(5000); 103 104 s.close(); 105 } 106 107 108 public static void main(String args[]) throws Exception { 109 110 InetAddress ia; 111 int port; 112 if (args.length >= 2) { 113 ia = InetAddress.getByName(args[0]); 114 port = Integer.parseInt(args[1]); 115 } else { 116 ia = InetAddress.getLocalHost(); 117 DatagramSocket s1 = new DatagramSocket(); 118 port = s1.getLocalPort(); 119 s1.close(); 120 } 121 122 new Concurrent(ia, port); 123 } 124 125} 126