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/*
* Copyright (c) 2007, 2024, 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 6548464
* @summary SocketChannel.open(SocketAddress) leaks file descriptor if
* connection cannot be established
* @requires vm.flagless
* @build OpenLeak
* @run junit/othervm OpenLeak
*/
import java.io.IOException;
import java.net.ConnectException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.channels.SocketChannel;
import java.nio.channels.UnresolvedAddressException;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
import static org.junit.jupiter.api.Assertions.assertThrows;
public class OpenLeak {
static final String OS_NAME = System.getProperty("os.name").toLowerCase(Locale.ROOT);
static final boolean IS_WINDOWS_2016 = OS_NAME.contains("windows") && OS_NAME.contains("2016");
// On Windows Server 2016 trying to connect to port 47 consumes the
// whole connect timeout - which makes the test fail in timeout.
// We skip this part of the test on Windows Server 2016
static final boolean TEST_WITH_RESERVED_PORT = !IS_WINDOWS_2016;
private static final int MAX_LOOP = 250000;
// Try to find a suitable port to provoke a "Connection Refused"
// error.
private static InetSocketAddress findSuitableRefusedAddress(InetSocketAddress isa)
throws IOException {
if (!TEST_WITH_RESERVED_PORT) return null;
var addr = isa.getAddress();
try (SocketChannel sc1 = SocketChannel.open(isa)) {
// If we manage to connect, let's try to use some other
// port.
// port 51 is reserved too - there should be nothing there...
isa = new InetSocketAddress(addr, 51);
try (SocketChannel sc2 = SocketChannel.open(isa)) {
}
// OK, last attempt...
// port 61 is reserved too - there should be nothing there...
isa = new InetSocketAddress(addr, 61);
try (SocketChannel sc3 = SocketChannel.open(isa)) {
}
System.err.println("Could not find a suitable port");
return null;
} catch (ConnectException x) {
}
return isa;
}
private static InetSocketAddress createUnresolved(InetSocketAddress isa, InetSocketAddress def) {
var sa = isa == null ? def : isa;
return InetSocketAddress.createUnresolved(sa.getHostString(), sa.getPort());
}
// Builds a list of test cases
static List<Object[]> testCases() throws Exception {
InetAddress lo = InetAddress.getLoopbackAddress();
// Try to find a suitable port that will cause a
// Connection Refused exception
// port 47 is reserved - there should be nothing there...
InetSocketAddress def = new InetSocketAddress(lo, 47);
InetSocketAddress isa = findSuitableRefusedAddress(def);
InetSocketAddress sa = createUnresolved(isa, def);
final List<Object[]> cases = new ArrayList<>();
cases.add(new Object[]{sa, UnresolvedAddressException.class});
if (isa != null) {
cases.add(new Object[]{isa, ConnectException.class});
}
return cases;
}
@ParameterizedTest
@MethodSource("testCases")
public void test(SocketAddress sa, Class<? extends Throwable> expectedException) throws Exception {
System.err.printf("%nExpecting %s for %s%n", expectedException, sa);
int i = 0;
try {
for (i = 0; i < MAX_LOOP; i++) {
Throwable x =
assertThrows(expectedException, () -> SocketChannel.open(sa));
if (i < 5 || i >= MAX_LOOP - 5) {
// print a message for the first five and last 5 exceptions
System.err.println(x);
}
}
} catch (Throwable t) {
System.err.println("Failed at " + i + " with " + t);
throw t;
}
}
}
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