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/*
* 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);
}
}
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