/*
* Copyright ( c ) 2001 , 2019 , 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 .
*/
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.MulticastSocket;
import java.net.SocketTimeoutException;
import jdk.test.lib.NetworkConfiguration;
import jdk.test.lib.net.IPSupport;
/**
* @ test
* @ bug 4488458
* @ summary IPv4 and IPv6 multicasting broken on Linux
* @ library / test / lib
* @ build jdk . test . lib . NetworkConfiguration
* jdk . test . lib . Platform
* @ run main Test
* @ run main / othervm - Djava . net . preferIPv4Stack = true Test
*/
public class Test {
static int count = 0 ;
static int failures = 0 ;
void doTest(String address) throws IOException {
boolean failed = false ;
InetAddress ia = InetAddress.getByName(address);
count++;
System.out.println("**********************" );
System.out.println("Test " + count + ": " + ia);
MulticastSocket mc = new MulticastSocket();
int port = mc.getLocalPort();
DatagramSocket s1 = new DatagramSocket();
byte msg[] = "Hello" .getBytes();
DatagramPacket p = new DatagramPacket(msg, msg.length);
mc.setSoTimeout(2000 );
try {
for (int i=0 ; i<2 ; i++) {
System.out.println("Join: " + ia);
mc.joinGroup(ia);
/* packets should be received */
for (int j = 0 ; j < 2 ; j++) {
p.setAddress(ia);
p.setPort(port);
System.out.println("Send packet to: " + ia);
s1.send(p);
try {
mc.receive(p);
System.out.println("Got packet! - Good." );
} catch (SocketTimeoutException e) {
failed = true ;
System.out.println("Failed: No packet received within timeout!!!" );
}
}
System.out.println("Leave: " + ia);
mc.leaveGroup(ia);
/*
* If there are multiple interface we might be a couple of
* copies still in our queue
*/
try {
while (true ) {
mc.receive(p);
}
} catch (SocketTimeoutException e) { }
/* packets should not be received */
p.setAddress(ia);
p.setPort(port);
s1.send(p);
try {
mc.receive(p);
System.out.println("Failed: Got packet after leaving group!!!" );
failed = true ;
} catch (SocketTimeoutException e) {
System.out.println("No packet received within timeout! - Good." );
}
}
} catch (IOException ioe) {
System.out.println("Failed: Unexpected exception thrown: " );
ioe.printStackTrace();
failed = true ;
}
mc.close();
s1.close();
if (failed) {
failures++;
System.out.println("Test failed!!" );
} else {
System.out.println("Test passed." );
}
}
void allTests() throws IOException {
NetworkConfiguration nc = NetworkConfiguration.probe();
// unconditionally test IPv4 address
doTest("224.80.80.80" );
// If IPv6 is enabled perform multicast tests with various scopes
if (nc.hasTestableIPv6Address()) {
doTest("ff01::a" );
}
if (nc.hasLinkLocalAddress()) {
doTest("ff02::a" );
}
if (nc.hasSiteLocalAddress()) {
doTest("ff05::a" );
}
if (nc.has_globaladdress()) {
doTest("ff0e::a" );
}
}
public static void main(String args[]) throws Exception {
IPSupport.throwSkippedExceptionIfNonOperational();
Test t = new Test();
if (args.length == 0 ) {
t.allTests();
} else {
for (int i = 0 ; i < args.length; i++) {
t.doTest(args[i]);
}
}
System.out.println("**********************" );
System.out.println(count + " test(s) executed. " + failures +
" test(s) failed." );
if (failures > 0 ) {
throw new Exception("Test failed - see log file for details" );
}
}
}
Messung V0.5 in Prozent C=95 H=78 G=86
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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