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/*
* Copyright (c) 2019, 2022, 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 8221481
* @library /test/lib
* @build jdk.test.lib.Utils
* @enablePreview
* @compile Timeouts.java
* @run testng/othervm/timeout=180 Timeouts
* @summary Test Socket timeouts
*/
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.SocketException;
import java.net.SocketTimeoutException;
import java.util.concurrent.Executors;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import org.testng.SkipException;
import org.testng.annotations.Test;
import static org.testng.Assert.*;
import jdk.test.lib.Utils;
@Test
public class Timeouts {
/**
* Test timed connect where connection is established
*/
public void testTimedConnect1() throws IOException {
try (ServerSocket ss = boundServerSocket()) {
try (Socket s = new Socket()) {
s.connect(ss.getLocalSocketAddress(), 2000);
}
}
}
/**
* Test timed connect where connection is refused
*/
public void testTimedConnect2() throws IOException {
try (Socket s = new Socket()) {
SocketAddress remote = Utils.refusingEndpoint();
try {
s.connect(remote, 10000);
} catch (ConnectException expected) { }
}
}
/**
* Test connect with a timeout of Integer.MAX_VALUE
*/
public void testTimedConnect3() throws IOException {
try (ServerSocket ss = boundServerSocket()) {
try (Socket s = new Socket()) {
s.connect(ss.getLocalSocketAddress(), Integer.MAX_VALUE);
}
}
}
/**
* Test connect with a negative timeout.
*/
public void testTimedConnect4() throws IOException {
try (ServerSocket ss = boundServerSocket()) {
try (Socket s = new Socket()) {
expectThrows(IllegalArgumentException.class,
() -> s.connect(ss.getLocalSocketAddress(), -1));
}
}
}
/**
* Test timed read where the read succeeds immediately
*/
public void testTimedRead1() throws IOException {
withConnection((s1, s2) -> {
s1.getOutputStream().write(99);
s2.setSoTimeout(30*1000);
int b = s2.getInputStream().read();
assertTrue(b == 99);
});
}
/**
* Test timed read where the read succeeds after a delay
*/
public void testTimedRead2() throws IOException {
withConnection((s1, s2) -> {
scheduleWrite(s1.getOutputStream(), 99, 2000);
s2.setSoTimeout(30*1000);
int b = s2.getInputStream().read();
assertTrue(b == 99);
});
}
/**
* Test timed read where the read times out
*/
public void testTimedRead3() throws IOException {
withConnection((s1, s2) -> {
s2.setSoTimeout(2000);
long startMillis = millisTime();
expectThrows(SocketTimeoutException.class, () -> s2.getInputStream().read());
int timeout = s2.getSoTimeout();
checkDuration(startMillis, timeout-100, timeout+2000);
});
}
/**
* Test timed read that succeeds after a previous read has timed out
*/
public void testTimedRead4() throws IOException {
withConnection((s1, s2) -> {
s2.setSoTimeout(2000);
expectThrows(SocketTimeoutException.class, () -> s2.getInputStream().read());
s1.getOutputStream().write(99);
int b = s2.getInputStream().read();
assertTrue(b == 99);
});
}
/**
* Test timed read that succeeds after a previous read has timed out and
* after a short delay
*/
public void testTimedRead5() throws IOException {
withConnection((s1, s2) -> {
s2.setSoTimeout(2000);
expectThrows(SocketTimeoutException.class, () -> s2.getInputStream().read());
s2.setSoTimeout(30*3000);
scheduleWrite(s1.getOutputStream(), 99, 2000);
int b = s2.getInputStream().read();
assertTrue(b == 99);
});
}
/**
* Test untimed read that succeeds after a previous read has timed out
*/
public void testTimedRead6() throws IOException {
withConnection((s1, s2) -> {
s2.setSoTimeout(2000);
expectThrows(SocketTimeoutException.class, () -> s2.getInputStream().read());
s1.getOutputStream().write(99);
s2.setSoTimeout(0);
int b = s2.getInputStream().read();
assertTrue(b == 99);
});
}
/**
* Test untimed read that succeeds after a previous read has timed out and
* after a short delay
*/
public void testTimedRead7() throws IOException {
withConnection((s1, s2) -> {
s2.setSoTimeout(2000);
expectThrows(SocketTimeoutException.class, () -> s2.getInputStream().read());
scheduleWrite(s1.getOutputStream(), 99, 2000);
s2.setSoTimeout(0);
int b = s2.getInputStream().read();
assertTrue(b == 99);
});
}
/**
* Test async close of timed read
*/
public void testTimedRead8() throws IOException {
withConnection((s1, s2) -> {
s2.setSoTimeout(30*1000);
scheduleClose(s2, 2000);
expectThrows(SocketException.class, () -> s2.getInputStream().read());
});
}
/**
* Test read with a timeout of Integer.MAX_VALUE
*/
public void testTimedRead9() throws IOException {
withConnection((s1, s2) -> {
scheduleWrite(s1.getOutputStream(), 99, 2000);
s2.setSoTimeout(Integer.MAX_VALUE);
int b = s2.getInputStream().read();
assertTrue(b == 99);
});
}
/**
* Test writing after a timed read.
*/
public void testTimedWrite1() throws IOException {
withConnection((s1, s2) -> {
s1.getOutputStream().write(99);
s2.setSoTimeout(3000);
int b = s2.getInputStream().read();
assertTrue(b == 99);
// schedule thread to read s1 to EOF
scheduleReadToEOF(s1.getInputStream(), 3000);
// write a lot so that write blocks
byte[] data = new byte[128*1024];
for (int i = 0; i < 100; i++) {
s2.getOutputStream().write(data);
}
});
}
/**
* Test async close of writer (after a timed read).
*/
public void testTimedWrite2() throws IOException {
withConnection((s1, s2) -> {
s1.getOutputStream().write(99);
s2.setSoTimeout(3000);
int b = s2.getInputStream().read();
assertTrue(b == 99);
// schedule s2 to be closed
scheduleClose(s2, 3000);
// write a lot so that write blocks
byte[] data = new byte[128*1024];
try {
while (true) {
s2.getOutputStream().write(data);
}
} catch (SocketException expected) { }
});
}
/**
* Test timed accept where a connection is established immediately
*/
public void testTimedAccept1() throws IOException {
Socket s1 = null;
Socket s2 = null;
try (ServerSocket ss = boundServerSocket()) {
s1 = new Socket();
s1.connect(ss.getLocalSocketAddress());
ss.setSoTimeout(30*1000);
s2 = ss.accept();
} finally {
if (s1 != null) s1.close();
if (s2 != null) s2.close();
}
}
/**
* Test timed accept where a connection is established after a short delay
*/
public void testTimedAccept2() throws IOException {
try (ServerSocket ss = boundServerSocket()) {
ss.setSoTimeout(30*1000);
scheduleConnect(ss.getLocalSocketAddress(), 2000);
Socket s = ss.accept();
s.close();
}
}
/**
* Test timed accept where the accept times out
*/
public void testTimedAccept3() throws IOException {
try (ServerSocket ss = boundServerSocket()) {
ss.setSoTimeout(2000);
long startMillis = millisTime();
try {
Socket s = ss.accept();
s.close();
fail();
} catch (SocketTimeoutException expected) {
int timeout = ss.getSoTimeout();
checkDuration(startMillis, timeout-100, timeout+2000);
}
}
}
/**
* Test timed accept where a connection is established immediately after a
* previous accept timed out.
*/
public void testTimedAccept4() throws IOException {
try (ServerSocket ss = boundServerSocket()) {
ss.setSoTimeout(2000);
try {
Socket s = ss.accept();
s.close();
fail();
} catch (SocketTimeoutException expected) { }
try (Socket s1 = new Socket()) {
s1.connect(ss.getLocalSocketAddress());
Socket s2 = ss.accept();
s2.close();
}
}
}
/**
* Test untimed accept where a connection is established after a previous
* accept timed out
*/
public void testTimedAccept5() throws IOException {
try (ServerSocket ss = boundServerSocket()) {
ss.setSoTimeout(2000);
try {
Socket s = ss.accept();
s.close();
fail();
} catch (SocketTimeoutException expected) { }
ss.setSoTimeout(0);
try (Socket s1 = new Socket()) {
s1.connect(ss.getLocalSocketAddress());
Socket s2 = ss.accept();
s2.close();
}
}
}
/**
* Test untimed accept where a connection is established after a previous
* accept timed out and after a short delay
*/
public void testTimedAccept6() throws IOException {
try (ServerSocket ss = boundServerSocket()) {
ss.setSoTimeout(2000);
try {
Socket s = ss.accept();
s.close();
fail();
} catch (SocketTimeoutException expected) { }
ss.setSoTimeout(0);
scheduleConnect(ss.getLocalSocketAddress(), 2000);
Socket s = ss.accept();
s.close();
}
}
/**
* Test async close of a timed accept
*/
public void testTimedAccept7() throws IOException {
try (ServerSocket ss = boundServerSocket()) {
ss.setSoTimeout(30*1000);
long delay = 2000;
scheduleClose(ss, delay);
long startMillis = millisTime();
try {
ss.accept().close();
fail();
} catch (SocketException expected) {
checkDuration(startMillis, delay-100, delay+2000);
}
}
}
/**
* Test timed accept with the thread interrupt status set.
*/
public void testTimedAccept8() throws IOException {
if (Thread.currentThread().isVirtual())
throw new SkipException("Main test is a virtual thread");
try (ServerSocket ss = boundServerSocket()) {
ss.setSoTimeout(2000);
Thread.currentThread().interrupt();
long startMillis = millisTime();
try {
Socket s = ss.accept();
s.close();
fail();
} catch (SocketTimeoutException expected) {
// accept should have blocked for 2 seconds
int timeout = ss.getSoTimeout();
checkDuration(startMillis, timeout-100, timeout+2000);
assertTrue(Thread.currentThread().isInterrupted());
} finally {
Thread.interrupted(); // clear interrupt status
}
}
}
/**
* Test interrupt of thread blocked in timed accept.
*/
public void testTimedAccept9() throws IOException {
if (Thread.currentThread().isVirtual())
throw new SkipException("Main test is a virtual thread");
try (ServerSocket ss = boundServerSocket()) {
ss.setSoTimeout(4000);
// interrupt thread after 1 second
Future<?> interrupter = scheduleInterrupt(Thread.currentThread(), 1000);
long startMillis = millisTime();
try {
Socket s = ss.accept(); // should block for 4 seconds
s.close();
fail();
} catch (SocketTimeoutException expected) {
// accept should have blocked for 4 seconds
int timeout = ss.getSoTimeout();
checkDuration(startMillis, timeout-100, timeout+2000);
assertTrue(Thread.currentThread().isInterrupted());
} finally {
interrupter.cancel(true);
Thread.interrupted(); // clear interrupt status
}
}
}
/**
* Test two threads blocked in timed accept where no connection is established.
*/
public void testTimedAccept10() throws Exception {
ExecutorService pool = Executors.newFixedThreadPool(2);
try (ServerSocket ss = boundServerSocket()) {
ss.setSoTimeout(4000);
long startMillis = millisTime();
Future<Socket> result1 = pool.submit(ss::accept);
Future<Socket> result2 = pool.submit(ss::accept);
// both tasks should complete with SocketTimeoutException
Throwable e = expectThrows(ExecutionException.class, result1::get);
assertTrue(e.getCause() instanceof SocketTimeoutException);
e = expectThrows(ExecutionException.class, result2::get);
assertTrue(e.getCause() instanceof SocketTimeoutException);
// should get here in 4 seconds, not 8 seconds
int timeout = ss.getSoTimeout();
checkDuration(startMillis, timeout-100, timeout+2000);
} finally {
pool.shutdown();
}
}
/**
* Test two threads blocked in timed accept where one connection is established.
*/
public void testTimedAccept11() throws Exception {
ExecutorService pool = Executors.newFixedThreadPool(2);
try (ServerSocket ss = boundServerSocket()) {
ss.setSoTimeout(4000);
long startMillis = millisTime();
Future<Socket> result1 = pool.submit(ss::accept);
Future<Socket> result2 = pool.submit(ss::accept);
// establish connection after 2 seconds
scheduleConnect(ss.getLocalSocketAddress(), 2000);
// one task should have accepted the connection, the other should
// have completed with SocketTimeoutException
Socket s1 = null;
try {
s1 = result1.get();
s1.close();
} catch (ExecutionException e) {
assertTrue(e.getCause() instanceof SocketTimeoutException);
}
Socket s2 = null;
try {
s2 = result2.get();
s2.close();
} catch (ExecutionException e) {
assertTrue(e.getCause() instanceof SocketTimeoutException);
}
assertTrue((s1 != null) ^ (s2 != null));
// should get here in 4 seconds, not 8 seconds
int timeout = ss.getSoTimeout();
checkDuration(startMillis, timeout-100, timeout+2000);
} finally {
pool.shutdown();
}
}
/**
* Test Socket setSoTimeout with a negative timeout.
*/
@Test(expectedExceptions = { IllegalArgumentException.class })
public void testBadTimeout1() throws IOException {
try (Socket s = new Socket()) {
s.setSoTimeout(-1);
}
}
/**
* Test ServerSocket setSoTimeout with a negative timeout.
*/
@Test(expectedExceptions = { IllegalArgumentException.class })
public void testBadTimeout2() throws IOException {
try (ServerSocket ss = new ServerSocket()) {
ss.setSoTimeout(-1);
}
}
/**
* Returns a ServerSocket bound to a port on the loopback address
*/
static ServerSocket boundServerSocket() throws IOException {
var loopback = InetAddress.getLoopbackAddress();
ServerSocket ss = new ServerSocket();
ss.bind(new InetSocketAddress(loopback, 0));
return ss;
}
/**
* An operation that accepts two arguments and may throw IOException
*/
interface ThrowingBiConsumer<T, U> {
void accept(T t, U u) throws IOException;
}
/**
* Invokes the consumer with a connected pair of sockets
*/
static void withConnection(ThrowingBiConsumer<Socket, Socket> consumer)
throws IOException
{
Socket s1 = null;
Socket s2 = null;
try (ServerSocket ss = boundServerSocket()) {
s1 = new Socket();
s1.connect(ss.getLocalSocketAddress());
s2 = ss.accept();
consumer.accept(s1, s2);
} finally {
if (s1 != null) s1.close();
if (s2 != null) s2.close();
}
}
/**
* Schedule c to be closed after a delay
*/
static void scheduleClose(Closeable c, long delay) {
schedule(() -> {
try {
c.close();
} catch (IOException ioe) { }
}, delay);
}
/**
* Schedule thread to be interrupted after a delay
*/
static Future<?> scheduleInterrupt(Thread thread, long delay) {
return schedule(() -> thread.interrupt(), delay);
}
/**
* Schedule a thread to connect to the given end point after a delay
*/
static void scheduleConnect(SocketAddress remote, long delay) {
schedule(() -> {
try (Socket s = new Socket()) {
s.connect(remote);
} catch (IOException ioe) { }
}, delay);
}
/**
* Schedule a thread to read to EOF after a delay
*/
static void scheduleReadToEOF(InputStream in, long delay) {
schedule(() -> {
byte[] bytes = new byte[8192];
try {
while (in.read(bytes) != -1) { }
} catch (IOException ioe) { }
}, delay);
}
/**
* Schedule a thread to write after a delay
*/
static void scheduleWrite(OutputStream out, byte[] data, long delay) {
schedule(() -> {
try {
out.write(data);
} catch (IOException ioe) { }
}, delay);
}
static void scheduleWrite(OutputStream out, int b, long delay) {
scheduleWrite(out, new byte[] { (byte)b }, delay);
}
static Future<?> schedule(Runnable task, long delay) {
ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
try {
return executor.schedule(task, delay, TimeUnit.MILLISECONDS);
} finally {
executor.shutdown();
}
}
/**
* Returns the current time in milliseconds.
*/
private static long millisTime() {
long now = System.nanoTime();
return TimeUnit.MILLISECONDS.convert(now, TimeUnit.NANOSECONDS);
}
/**
* Check the duration of a task
* @param start start time, in milliseconds
* @param min minimum expected duration, in milliseconds
* @param max maximum expected duration, in milliseconds
* @return the duration (now - start), in milliseconds
*/
private static long checkDuration(long start, long min, long max) {
long duration = millisTime() - start;
assertTrue(duration >= min,
"Duration " + duration + "ms, expected >= " + min + "ms");
assertTrue(duration <= max,
"Duration " + duration + "ms, expected <= " + max + "ms");
return duration;
}
}
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