| /* |
| * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 4431020 |
| * @summary On Windows 2000 we observed behaviour that reflects the underlying |
| * implementation :- |
| * 1. PortUnreachableException throw per underlying reset |
| * 2. No PUE throw for DatagramSocket.send |
| */ |
| import java.net.*; |
| |
| public class Concurrent implements Runnable { |
| |
| DatagramSocket s; |
| |
| public void run() { |
| try { |
| byte b[] = new byte[512]; |
| DatagramPacket p = new DatagramPacket(b, b.length); |
| |
| int pue_count = 0; |
| while (true) { |
| try { |
| System.out.println("receive..."); |
| s.receive(p); |
| } catch (PortUnreachableException pue) { |
| System.out.println("receive threw PortUnreachableException"); |
| pue_count++; |
| } |
| System.out.println("receiver sleeping"); |
| Thread.currentThread().sleep(100*pue_count); |
| } |
| |
| } catch (Exception e) { } |
| } |
| |
| Concurrent(InetAddress ia, int port) throws Exception { |
| |
| System.out.println(""); |
| System.out.println("***"); |
| System.out.println("Test Description:"); |
| System.out.println(" - Block reader thread on receive"); |
| System.out.println(" - Send datagrams to bad destination with wee pauses"); |
| System.out.println(" - Observe which thread gets the PUE"); |
| System.out.println(""); |
| |
| /* |
| * Create the datagram and connect it to destination |
| */ |
| s = new DatagramSocket(); |
| s.connect(ia, port); |
| s.setSoTimeout(60000); |
| |
| /* |
| * Start the reader thread |
| */ |
| Thread thr = new Thread(this); |
| thr.start(); |
| Thread.currentThread().sleep(2000); |
| |
| byte b[] = new byte[512]; |
| DatagramPacket p = new DatagramPacket(b, b.length); |
| |
| /* |
| * Send a bunch of packets to the destination |
| */ |
| for (int i=0; i<10; i++) { |
| try { |
| System.out.println("Sending..."); |
| s.send(p); |
| } catch (PortUnreachableException e) { |
| System.out.println("send threw PortUnreachableException"); |
| } |
| Thread.currentThread().sleep(100); |
| } |
| |
| /* |
| * Give time for ICMP port unreachables to return |
| */ |
| Thread.currentThread().sleep(5000); |
| |
| s.close(); |
| } |
| |
| |
| public static void main(String args[]) throws Exception { |
| |
| InetAddress ia; |
| int port; |
| if (args.length >= 2) { |
| ia = InetAddress.getByName(args[0]); |
| port = Integer.parseInt(args[1]); |
| } else { |
| ia = InetAddress.getLocalHost(); |
| DatagramSocket s1 = new DatagramSocket(); |
| port = s1.getLocalPort(); |
| s1.close(); |
| } |
| |
| new Concurrent(ia, port); |
| } |
| |
| } |