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/*
* Copyright (c) 2010, 2015, 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
* @summary Test socket adapter sendUrgentData method
* @bug 6963907
* @key randomness
*/
import java.net.*;
import java.nio.ByteBuffer;
import java.nio.channels.*;
import java.io.IOException;
import java.util.Random;
public class OutOfBand {
private static final Random rand = new Random();
public static void main(String[] args) throws Exception {
ServerSocketChannel ssc = null;
SocketChannel sc1 = null;
SocketChannel sc2 = null;
try {
// establish loopback connection
ssc = ServerSocketChannel.open().bind(new InetSocketAddress(0));
InetAddress lh = InetAddress.getLocalHost();
SocketAddress remote =
new InetSocketAddress(lh, ssc.socket().getLocalPort());
sc1 = SocketChannel.open(remote);
sc2 = ssc.accept();
// enable SO_OOBLINE on server side
sc2.socket().setOOBInline(true);
// run tests
test1(sc1, sc2);
test2(sc1, sc2);
test3(sc1, sc2);
} finally {
if (sc1 != null) sc1.close();
if (sc2 != null) sc2.close();
if (ssc != null) ssc.close();
}
}
/**
* Basic test to check that OOB/TCP urgent byte is received.
*/
static void test1(SocketChannel client, SocketChannel server)
throws Exception
{
assert server.socket().getOOBInline();
ByteBuffer bb = ByteBuffer.allocate(100);
for (int i=0; i<1000; i++) {
int b1 = -127 + rand.nextInt(384);
client.socket().sendUrgentData(b1);
bb.clear();
if (server.read(bb) != 1)
throw new RuntimeException("One byte expected");
bb.flip();
byte b2 = bb.get();
if ((byte)b1 != b2)
throw new RuntimeException("Unexpected byte");
}
}
/**
* Basic test to check that OOB/TCP urgent byte is received, maybe with
* OOB mark changing.
*/
static void test2(final SocketChannel client, SocketChannel server)
throws Exception
{
assert server.socket().getOOBInline();
Runnable sender = new Runnable() {
public void run() {
try {
for (int i=0; i<256; i++)
client.socket().sendUrgentData(i);
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
};
Thread thr = new Thread(sender);
thr.start();
ByteBuffer bb = ByteBuffer.allocate(256);
while (bb.hasRemaining()) {
if (server.read(bb) < 0)
throw new RuntimeException("Unexpected EOF");
}
bb.flip();
byte expect = 0;
while (bb.hasRemaining()) {
if (bb.get() != expect)
throw new RuntimeException("Unexpected byte");
expect++;
}
thr.join();
}
/**
* Test that is close to some real world examples where an urgent byte is
* used to "cancel" a long running query or transaction on the server.
*/
static void test3(SocketChannel client, final SocketChannel server)
throws Exception
{
final int STOP = rand.nextInt(256);
assert server.socket().getOOBInline();
Runnable reader = new Runnable() {
public void run() {
ByteBuffer bb = ByteBuffer.allocate(100);
try {
int n = server.read(bb);
if (n != 1) {
String msg = (n < 0) ? "Unexpected EOF" :
"One byte expected";
throw new RuntimeException(msg);
}
bb.flip();
if (bb.get() != (byte)STOP)
throw new RuntimeException("Unexpected byte");
bb.flip();
server.write(bb);
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
};
Thread thr = new Thread(reader);
thr.start();
// "stop" server
client.socket().sendUrgentData(STOP);
// wait for server reply
ByteBuffer bb = ByteBuffer.allocate(100);
int n = client.read(bb);
if (n != 1)
throw new RuntimeException("Unexpected number of bytes");
bb.flip();
if (bb.get() != (byte)STOP)
throw new RuntimeException("Unexpected reply");
thr.join();
}
}
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