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/*
* Copyright (c) 2002, 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 4617165
* @summary Ensure that socket hangups are handled correctly
* @library ..
* @build TestUtil
* @run main Hangup
*/
import java.io.*;
import java.net.*;
import java.nio.*;
import java.nio.channels.*;
import java.util.*;
public class Hangup {
static PrintStream log = System.err;
static int failures = 0;
private static class Failure
extends RuntimeException
{
Failure(String s) {
super(s);
}
}
static void doSelect(Selector sel, SelectionKey sk, int count)
throws IOException
{
int n = sel.select();
if (n != 1)
throw new Failure("Select returned zero");
Set sks = sel.selectedKeys();
if (sks.size() != 1)
throw new Failure("Wrong size for selected-key set: "
+ sks.size());
if (!sks.remove(sk))
throw new Failure("Key not in selected-key set");
log.println("S: Socket selected #" + count);
}
static void dally() {
try {
Thread.sleep(100);
} catch (InterruptedException x) { }
}
static void test(boolean writeFromClient, boolean readAfterClose)
throws IOException
{
ServerSocketChannel ssc = null;
SocketChannel cl = null; // client end
SocketChannel sv = null; // server end
Selector sel = null;
log.println();
log.println("Test: writeFromClient = " + writeFromClient
+ ", readAfterClose = " + readAfterClose);
try {
int ns = 0; // Number of selection operations done
// Set up server socket
ssc = ServerSocketChannel.open();
SocketAddress sa = TestUtil.bindToRandomPort(ssc);
log.println("S: Listening on port "
+ ssc.socket().getLocalPort());
// Connect client
cl = SocketChannel.open(sa);
log.println("C: Connected via port "
+ cl.socket().getLocalPort());
// Accept client connection
sv = ssc.accept();
log.println("S: Client connection accepted");
// Create selector and register server side
sel = Selector.open();
sv.configureBlocking(false);
SelectionKey sk = sv.register(sel, SelectionKey.OP_READ);
ByteBuffer stuff = ByteBuffer.allocate(10);
int n;
if (writeFromClient) {
// Write from client, read from server
stuff.clear();
if (cl.write(stuff) != stuff.capacity())
throw new Failure("Incorrect number of bytes written");
log.println("C: Wrote stuff");
dally();
doSelect(sel, sk, ++ns);
stuff.clear();
if (sv.read(stuff) != stuff.capacity())
throw new Failure("Wrong number of bytes read");
log.println("S: Read stuff");
}
// Close client side
cl.close();
log.println("C: Socket closed");
dally();
// Select again
doSelect(sel, sk, ++ns);
if (readAfterClose) {
// Read from client after client has disconnected
stuff.clear();
if (sv.read(stuff) != -1)
throw new Failure("Wrong number of bytes read");
log.println("S: Read EOF");
}
// Select a couple more times just to make sure we're doing
// the right thing
doSelect(sel, sk, ++ns);
doSelect(sel, sk, ++ns);
} finally {
if (ssc != null)
ssc.close();
if (cl != null)
cl.close();
if (sv != null)
sv.close();
if (sel != null)
sel.close();
}
}
public static void main(String[] args) throws IOException {
for (boolean writeFromClient = false;; writeFromClient = true) {
for (boolean readAfterClose = false;; readAfterClose = true) {
try {
test(writeFromClient, readAfterClose);
} catch (Failure x) {
x.printStackTrace(log);
failures++;
}
if (readAfterClose)
break;
}
if (writeFromClient)
break;
}
if (failures > 0) {
log.println();
throw new RuntimeException("Some tests failed");
}
}
}
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