/*
* 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 OneExceptionOnly {
static void doTest(InetAddress ia, int port, boolean testSend) throws Exception {
System.out.println("");
System.out.println("***");
System.out.println("Test Description:");
System.out.println(" - Send 10 datagrams to bad destination");
System.out.println(" - <wait a wee while>");
if (testSend) {
System.out.println(" - Send another datagram - should throw PUE or timeout");
} else {
System.out.println(" - Receive another datagram - should throw PUE or timeout");
}
System.out.println(" - Receive another receive - a SocketTimeoutException expected");
System.out.println("");
/*
* Create the datagram and connect it to destination
*/
DatagramSocket s1 = new DatagramSocket();
s1.connect(ia, port);
byte b[] = new byte[512];
DatagramPacket p = new DatagramPacket(b, b.length);
/*
* Send a bunch of packets to the destination
*/
int outstanding = 0;
for (int i=0; i<20; i++) {
try {
s1.send(p);
outstanding++;
} catch (PortUnreachableException e) {
/* PUE throw => assume none outstanding now */
outstanding = 0;
}
if (outstanding > 1) {
break;
}
}
if (outstanding < 1) {
System.out.println("Insufficient exceptions outstanding - Test Skipped (Passed).");
s1.close();
return;
}
/*
* Give time for ICMP port unreachables to return
*/
Thread.currentThread().sleep(5000);
/*
* The next send or receive should cause a PUE to be thrown
*/
boolean gotPUE = false;
boolean gotTimeout = false;
s1.setSoTimeout(2000);
try {
if (testSend) {
s1.send(p);
} else {
s1.receive(p);
}
} catch (PortUnreachableException pue) {
gotPUE = true;
System.out.println("Expected PortUnreachableException thrown - good!");
} catch (SocketTimeoutException exc) {
}
/*
* The next receive should timeout
*/
if (gotPUE) {
try {
s1.receive(p);
} catch (PortUnreachableException pue) {
throw new Exception("Unexpected PUE received - assumed that PUs would be consumed");
} catch (SocketTimeoutException exc) {
System.out.println("Expected SocketTimeoutException thrown - excellent! - Test Passed.");
}
} else {
System.out.println("Expected PUE not thrown - packets probably discarded (Passed).");
}
s1.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();
}
doTest(ia, port, true);
doTest(ia, port, false);
}
}