Java example source code file (Send.java)
The Send.java Java example source code
/*
* Copyright (c) 2009, 2010, 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 4927640
* @summary Tests the SCTP protocol implementation
* @author chegar
*/
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.nio.ByteBuffer;
import java.nio.channels.NotYetConnectedException;
import java.nio.channels.ClosedChannelException;
import com.sun.nio.sctp.AbstractNotificationHandler;
import com.sun.nio.sctp.Association;
import com.sun.nio.sctp.AssociationChangeNotification;
import com.sun.nio.sctp.AssociationChangeNotification.AssocChangeEvent;
import com.sun.nio.sctp.HandlerResult;
import com.sun.nio.sctp.InvalidStreamException;
import com.sun.nio.sctp.MessageInfo;
import com.sun.nio.sctp.Notification;
import com.sun.nio.sctp.SctpChannel;
import com.sun.nio.sctp.SctpServerChannel;
import static java.lang.System.out;
import static java.lang.System.err;
public class Send {
/* Latches used to synchronize between the client and server so that
* connections without any IO may not be closed without being accepted */
final CountDownLatch clientFinishedLatch = new CountDownLatch(1);
final CountDownLatch serverFinishedLatch = new CountDownLatch(1);
SendNotificationHandler handler = new SendNotificationHandler();
void test(String[] args) {
SocketAddress address = null;
Server server = null;
if (!Util.isSCTPSupported()) {
out.println("SCTP protocol is not supported");
out.println("Test cannot be run");
return;
}
if (args.length == 2) {
/* requested to connecct to a specific address */
try {
int port = Integer.valueOf(args[1]);
address = new InetSocketAddress(args[0], port);
} catch (NumberFormatException nfe) {
err.println(nfe);
}
} else {
/* start server on local machine, default */
try {
server = new Server();
server.start();
address = server.address();
debug("Server started and listening on " + address);
} catch (IOException ioe) {
ioe.printStackTrace();
return;
}
}
doTest(address);
}
void doTest(SocketAddress peerAddress) {
SctpChannel channel = null;
ByteBuffer buffer = ByteBuffer.allocate(Util.LARGE_BUFFER);
MessageInfo info = MessageInfo.createOutgoing(null, 0);
try {
channel = SctpChannel.open();
/* TEST 1: Verify NotYetConnectedException thrown */
try {
channel.send(buffer, info);
fail("should have thrown NotYetConnectedException");
} catch (NotYetConnectedException unused) {
pass();
} catch (IOException ioe) {
unexpected(ioe);
}
channel.connect(peerAddress);
/* Receive CommUp */
channel.receive(buffer, null, handler);
/* TEST 2: send small message */
int streamNumber = 0;
debug("sending on stream number: " + streamNumber);
info = MessageInfo.createOutgoing(null, streamNumber);
buffer.put(Util.SMALL_MESSAGE.getBytes("ISO-8859-1"));
buffer.flip();
int position = buffer.position();
int remaining = buffer.remaining();
debug("sending small message: " + buffer);
int sent = channel.send(buffer, info);
check(sent == remaining, "sent should be equal to remaining");
check(buffer.position() == (position + sent),
"buffers position should have been incremented by sent");
buffer.clear();
/* TEST 3: send large message */
streamNumber = handler.maxOutStreams() - 1;
debug("sending on stream number: " + streamNumber);
info = MessageInfo.createOutgoing(null, streamNumber);
buffer.put(Util.LARGE_MESSAGE.getBytes("ISO-8859-1"));
buffer.flip();
position = buffer.position();
remaining = buffer.remaining();
debug("sending large message: " + buffer);
sent = channel.send(buffer, info);
check(sent == remaining, "sent should be equal to remaining");
check(buffer.position() == (position + sent),
"buffers position should have been incremented by sent");
/* TEST 4: InvalidStreamExcepton */
streamNumber = handler.maxInStreams;
info = MessageInfo.createOutgoing(null, streamNumber);
buffer.clear();
buffer.put(Util.SMALL_MESSAGE.getBytes("ISO-8859-1"));
buffer.flip();
position = buffer.position();
remaining = buffer.remaining();
debug("sending on stream number: " + streamNumber);
debug("sending small message: " + buffer);
try {
sent = channel.send(buffer, info);
fail("should have thrown InvalidStreamExcepton");
} catch (InvalidStreamException ise){
pass();
} catch (IOException ioe) {
unexpected(ioe);
}
check(buffer.remaining() == remaining,
"remaining should not be changed");
check(buffer.position() == position,
"buffers position should not be changed");
/* TEST 5: Non blocking send should return zero if there is
insufficient room in the underlying output buffer */
buffer.clear();
channel.configureBlocking(false);
info = MessageInfo.createOutgoing(null, 1);
buffer.put(Util.LARGE_MESSAGE.getBytes("ISO-8859-1"));
buffer.flip();
int count = 0; // do not loop forever
do {
position = buffer.position();
remaining = buffer.remaining();
debug("sending large message: " + buffer);
sent = channel.send(buffer, info);
if (sent == 0) {
check(buffer.remaining() == remaining,
"remaining should not be changed");
check(buffer.position() == position,
"buffers position should not be changed");
}
buffer.rewind();
} while (sent != 0 && count++ < 100);
/* TEST 6: ClosedChannelException */
channel.close();
try {
channel.send(buffer, info);
fail("should have thrown ClosedChannelException");
} catch (ClosedChannelException cce) {
pass();
} catch (IOException ioe) {
unexpected(ioe);
}
/* TEST 7: send without previous receive.
* Verify that send can still throw InvalidStreamExcepton */
debug("Opening new channel.");
channel = SctpChannel.open(peerAddress, 0, 0);
streamNumber = Short.MAX_VALUE - 1;
info = MessageInfo.createOutgoing(null, streamNumber);
buffer.clear();
buffer.put(Util.SMALL_MESSAGE.getBytes("ISO-8859-1"));
buffer.flip();
position = buffer.position();
remaining = buffer.remaining();
debug("sending on stream number: " + streamNumber);
debug("sending small message: " + buffer);
try {
sent = channel.send(buffer, info);
fail("should have thrown InvalidStreamExcepton");
} catch (InvalidStreamException ise){
pass();
} catch (IOException ioe) {
unexpected(ioe);
}
check(buffer.remaining() == remaining,
"remaining should not be changed");
check(buffer.position() == position,
"buffers position should not be changed");
/* Receive CommUp */
channel.receive(buffer, null, handler);
check(handler.receivedCommUp(), "should have received COMM_UP");
/* TEST 8: Send to an invalid preferred SocketAddress */
SocketAddress addr = new InetSocketAddress("123.123.123.123", 3456);
info = MessageInfo.createOutgoing(addr, 0);
debug("sending to " + addr);
debug("sending small message: " + buffer);
try {
sent = channel.send(buffer, info);
fail("Invalid address should have thrown an Exception.");
} catch (Exception e){
pass();
debug("OK, caught " + e);
}
/* TEST 9: Send from heap buffer to force implementation to
* substitute with a native buffer, then check that its position
* is updated correctly */
buffer.clear();
info = MessageInfo.createOutgoing(null, 0);
buffer.put(Util.SMALL_MESSAGE.getBytes("ISO-8859-1"));
buffer.flip();
final int offset = 1;
buffer.position(offset);
remaining = buffer.remaining();
debug("sending small message: " + buffer);
try {
sent = channel.send(buffer, info);
check(sent == remaining, "sent should be equal to remaining");
check(buffer.position() == (offset + sent),
"buffers position should have been incremented by sent");
} catch (IllegalArgumentException iae) {
fail(iae + ", Error updating buffers position");
}
} catch (IOException ioe) {
unexpected(ioe);
} finally {
clientFinishedLatch.countDown();
try { serverFinishedLatch.await(10L, TimeUnit.SECONDS); }
catch (InterruptedException ie) { unexpected(ie); }
if (channel != null) {
try { channel.close(); }
catch (IOException e) { unexpected (e);}
}
}
}
class Server implements Runnable
{
final InetSocketAddress serverAddr;
private SctpServerChannel ssc;
public Server() throws IOException {
ssc = SctpServerChannel.open().bind(null);
java.util.Set<SocketAddress> addrs = ssc.getAllLocalAddresses();
if (addrs.isEmpty())
debug("addrs should not be empty");
serverAddr = (InetSocketAddress) addrs.iterator().next();
}
public void start() {
(new Thread(this, "Server-" + serverAddr.getPort())).start();
}
public InetSocketAddress address() {
return serverAddr;
}
@Override
public void run() {
ByteBuffer buffer = ByteBuffer.allocateDirect(Util.LARGE_BUFFER);
SctpChannel sc1 = null, sc2 = null;
try {
sc1 = ssc.accept();
/* receive a small message */
MessageInfo info;
do {
info = sc1.receive(buffer, null, null);
if (info == null) {
fail("Server: unexpected null from receive");
return;
}
} while (!info.isComplete());
buffer.flip();
check(info != null, "info is null");
check(info.streamNumber() == 0,
"message not sent on the correct stream");
check(info.bytes() == Util.SMALL_MESSAGE.getBytes("ISO-8859-1").
length, "bytes received not equal to message length");
check(info.bytes() == buffer.remaining(), "bytes != remaining");
check(Util.compare(buffer, Util.SMALL_MESSAGE),
"received message not the same as sent message");
/* receive a large message */
buffer.clear();
do {
info = sc1.receive(buffer, null, null);
if (info == null) {
fail("Server: unexpected null from receive");
return;
}
} while (!info.isComplete());
buffer.flip();
check(info != null, "info is null");
check(info.streamNumber() == handler.maxOutStreams() - 1,
"message not sent on the correct stream");
check(info.bytes() == Util.LARGE_MESSAGE.getBytes("ISO-8859-1").
length, "bytes received not equal to message length");
check(info.bytes() == buffer.remaining(), "bytes != remaining");
check(Util.compare(buffer, Util.LARGE_MESSAGE),
"received message not the same as sent message");
/* TEST 7 ++ */
sc2 = ssc.accept();
/* TEST 9 */
ByteBuffer expected = ByteBuffer.allocate(Util.SMALL_BUFFER);
expected.put(Util.SMALL_MESSAGE.getBytes("ISO-8859-1"));
expected.flip();
final int offset = 1;
expected.position(offset);
buffer.clear();
do {
info = sc2.receive(buffer, null, null);
if (info == null) {
fail("Server: unexpected null from receive");
return;
}
} while (!info.isComplete());
buffer.flip();
check(info != null, "info is null");
check(info.streamNumber() == 0, "message not sent on the correct stream");
check(info.bytes() == expected.remaining(),
"bytes received not equal to message length");
check(info.bytes() == buffer.remaining(), "bytes != remaining");
check(expected.equals(buffer),
"received message not the same as sent message");
clientFinishedLatch.await(10L, TimeUnit.SECONDS);
serverFinishedLatch.countDown();
} catch (IOException ioe) {
unexpected(ioe);
} catch (InterruptedException ie) {
unexpected(ie);
} finally {
try { if (ssc != null) ssc.close(); }
catch (IOException unused) {}
try { if (sc1 != null) sc1.close(); }
catch (IOException unused) {}
try { if (sc2 != null) sc2.close(); }
catch (IOException unused) {}
}
}
}
class SendNotificationHandler extends AbstractNotificationHandler<Void>
{
boolean receivedCommUp; // false
int maxInStreams;
int maxOutStreams;
public boolean receivedCommUp() {
return receivedCommUp;
}
public int maxInStreams() {
return maxInStreams;
}
public int maxOutStreams(){
return maxOutStreams;
}
@Override
public HandlerResult handleNotification(
Notification notification, Void attachment) {
fail("Unknown notification type");
return HandlerResult.CONTINUE;
}
@Override
public HandlerResult handleNotification(
AssociationChangeNotification notification, Void attachment) {
AssocChangeEvent event = notification.event();
Association association = notification.association();
debug("AssociationChangeNotification");
debug(" Association: " + notification.association());
debug(" Event: " + event);
if (event.equals(AssocChangeEvent.COMM_UP))
receivedCommUp = true;
this.maxInStreams = association.maxInboundStreams();
this.maxOutStreams = association.maxOutboundStreams();
return HandlerResult.RETURN;
}
}
//--------------------- Infrastructure ---------------------------
boolean debug = true;
volatile int passed = 0, failed = 0;
void pass() {passed++;}
void fail() {failed++; Thread.dumpStack();}
void fail(String msg) {System.err.println(msg); fail();}
void unexpected(Throwable t) {failed++; t.printStackTrace();}
void check(boolean cond) {if (cond) pass(); else fail();}
void check(boolean cond, String failMessage) {if (cond) pass(); else fail(failMessage);}
void debug(String message) {if(debug) { System.out.println(message); } }
public static void main(String[] args) throws Throwable {
Class<?> k = new Object(){}.getClass().getEnclosingClass();
try {k.getMethod("instanceMain",String[].class)
.invoke( k.newInstance(), (Object) args);}
catch (Throwable e) {throw e.getCause();}}
public void instanceMain(String[] args) throws Throwable {
try {test(args);} catch (Throwable t) {unexpected(t);}
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
if (failed > 0) throw new AssertionError("Some tests failed");}
}
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