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/*
* Copyright (c) 1998, 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 4091859 8189366
* @library /test/lib
* @summary Test Socket.getInputStream().available()
* @run main CloseAvailable
* @run main/othervm -Djava.net.preferIPv4Stack=true CloseAvailable
*/
import java.net.*;
import java.io.*;
import jdk.test.lib.net.IPSupport;
public class CloseAvailable {
public static void main(String[] args) throws Exception {
IPSupport.throwSkippedExceptionIfNonOperational();
testClose();
testEOF(true);
testEOF(false);
testIOEOnClosed(true);
testIOEOnClosed(false);
}
/*
* Verifies that the Socket.getInputStream().available() throws an IOException
* if invoked after the socket has been closed.
*/
static void testClose() throws IOException {
System.out.println("testClose");
final InetAddress addr = InetAddress.getLoopbackAddress();
final Socket acceptedSocket;
try (final ServerSocket ss = new ServerSocket(0, 0, addr)) {
System.out.println("created server socket: " + ss);
final int port = ss.getLocalPort();
// start a thread which initiates a socket connection to the server
Thread.ofPlatform().name("Close-Available-1")
.start(() -> {
try {
final Socket s = new Socket(addr, port);
System.out.println("created socket: " + s);
s.close();
System.out.println("closed socket: " + s);
} catch (Exception e) {
System.err.println("exception in " + Thread.currentThread().getName()
+ ": " + e);
e.printStackTrace();
}
});
// accept the client connect
acceptedSocket = ss.accept();
System.out.println(ss + " accepted connection " + acceptedSocket);
} // (intentionally) close the ServerSocket
final DataInputStream is = new DataInputStream(acceptedSocket.getInputStream());
is.close(); // close the inputstream and thus the underlying socket
System.out.println("closed inputstream of socket: " + acceptedSocket);
try {
final int av = is.available();
// available() was expected to fail but didn't
throw new AssertionError("Socket.getInputStream().available() was expected to fail on "
+ acceptedSocket + " but returned " + av);
} catch (IOException ex) {
// expected IOException
System.out.println("received the expected IOException: " + ex);
}
}
/*
* Verifies consistency of Socket.getInputStream().available() behaviour when EOF reached, both
* explicitly and implicitly.
*/
static void testEOF(boolean readUntilEOF) throws IOException {
System.out.println("testEOF, readUntilEOF: " + readUntilEOF);
final InetAddress addr = InetAddress.getLoopbackAddress();
try (final ServerSocket ss = new ServerSocket()) {
ss.bind(new InetSocketAddress(addr, 0), 0);
System.out.println("server socket bound: " + ss);
final int port = ss.getLocalPort();
try (final Socket s = new Socket(addr, port)) {
System.out.println("created socket: " + s);
s.getOutputStream().write(0x42);
s.shutdownOutput();
try (final Socket soc = ss.accept()) {
System.out.println("accepted socket: " + soc);
ss.close();
System.out.println("closed server socket: " + ss);
final InputStream is = soc.getInputStream();
int b = is.read();
assert b == 0x42 : "unexpected byte read: " + b;
assert !s.isClosed() : "socket " + s + " is unexpectedly closed";
if (readUntilEOF) {
b = is.read();
assert b == -1 : "unexpected number of bytes read: " + b;
}
int a;
for (int i = 0; i < 100; i++) {
a = is.available();
System.out.print(a + ", ");
if (a != 0) {
throw new RuntimeException("Unexpected non-zero available: " + a);
}
}
assert !s.isClosed() : "socket " + s + " is unexpectedly closed";
final int more = is.read();
assert more == -1 : "unexpected byte read: " + more;
}
}
}
System.out.println("\ncomplete");
}
/*
* Verifies IOException thrown by Socket.getInputStream().available(), on a closed input stream
* that may, or may not, have reached EOF prior to closure.
*/
static void testIOEOnClosed(boolean readUntilEOF) throws IOException {
System.out.println("testIOEOnClosed, readUntilEOF: " + readUntilEOF);
final InetAddress addr = InetAddress.getLoopbackAddress();
try (final ServerSocket ss = new ServerSocket()) {
ss.bind(new InetSocketAddress(addr, 0), 0);
System.out.println("server socket bound: " + ss);
final int port = ss.getLocalPort();
try (final Socket s = new Socket(addr, port)) {
System.out.println("created socket: " + s);
s.getOutputStream().write(0x43);
s.shutdownOutput();
try (final Socket soc = ss.accept()) {
System.out.println("accepted socket: " + soc);
ss.close();
System.out.println("closed server socket: " + ss);
final InputStream is = soc.getInputStream();
int b = is.read();
assert b == 0x43 : "unexpected byte read: " + b;
assert !s.isClosed() : "socket " + s + " is unexpectedly closed";
if (readUntilEOF) {
b = is.read();
assert b == -1 : "unexpected byte read: " + b;
}
is.close();
System.out.println("closed inputstream of socket: " + soc);
try {
b = is.available();
throw new RuntimeException("UNEXPECTED successful read: " + b);
} catch (IOException expected) {
System.out.println("caught expected IOException:" + expected);
}
}
}
}
System.out.println("\ncomplete");
}
}
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