/*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.channel.epoll;
import io.netty.bootstrap.AbstractBootstrap;
import io.netty.bootstrap.Bootstrap;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import io.netty.testsuite.util.TestUtils;
import io.netty.util.NetUtil;
import io.netty.util.ReferenceCountUtil;
import io.netty.util.ResourceLeakDetector;
import io.netty.util.internal.StringUtil;
import org.junit.Assert;
import org.junit.Assume;
import org.junit.Test;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicBoolean;
public class EpollReuseAddrTest {
private static final int MAJOR;
private static final int MINOR;
private static final int BUGFIX;
static {
String kernelVersion = Native.kernelVersion();
int index = kernelVersion.indexOf('-');
if (index > -1) {
kernelVersion = kernelVersion.substring(0, index);
}
String[] versionParts = StringUtil.split(kernelVersion, '.');
if (versionParts.length <= 3) {
MAJOR = Integer.parseInt(versionParts[0]);
MINOR = Integer.parseInt(versionParts[1]);
if (versionParts.length == 3) {
BUGFIX = Integer.parseInt(versionParts[2]);
} else {
BUGFIX = 0;
}
} else {
throw new IllegalStateException("Can not parse kernel version " + kernelVersion);
}
}
@Test
public void testMultipleBindSocketChannelWithoutReusePortFails() {
Assume.assumeTrue(versionEqOrGt(3, 9, 0));
testMultipleBindDatagramChannelWithoutReusePortFails0(createServerBootstrap());
}
@Test
public void testMultipleBindDatagramChannelWithoutReusePortFails() {
Assume.assumeTrue(versionEqOrGt(3, 9, 0));
testMultipleBindDatagramChannelWithoutReusePortFails0(createBootstrap());
}
private static void testMultipleBindDatagramChannelWithoutReusePortFails0(AbstractBootstrap<?, ?> bootstrap) {
bootstrap.handler(new DummyHandler());
ChannelFuture future = bootstrap.bind().syncUninterruptibly();
try {
bootstrap.bind().syncUninterruptibly();
Assert.fail();
} catch (Exception e) {
Assert.assertTrue(e instanceof IOException);
}
future.channel().close().syncUninterruptibly();
}
@Test(timeout = 10000)
public void testMultipleBindSocketChannel() throws Exception {
Assume.assumeTrue(versionEqOrGt(3, 9, 0));
ServerBootstrap bootstrap = createServerBootstrap();
bootstrap.option(EpollChannelOption.SO_REUSEPORT, true);
final AtomicBoolean accepted1 = new AtomicBoolean();
bootstrap.childHandler(new ServerSocketTestHandler(accepted1));
ChannelFuture future = bootstrap.bind().syncUninterruptibly();
InetSocketAddress address1 = (InetSocketAddress) future.channel().localAddress();
final AtomicBoolean accepted2 = new AtomicBoolean();
bootstrap.childHandler(new ServerSocketTestHandler(accepted2));
ChannelFuture future2 = bootstrap.bind().syncUninterruptibly();
InetSocketAddress address2 = (InetSocketAddress) future2.channel().localAddress();
Assert.assertEquals(address1, address2);
while (!accepted1.get() || !accepted2.get()) {
Socket socket = new Socket(address1.getAddress(), address1.getPort());
socket.setReuseAddress(true);
socket.close();
}
future.channel().close().syncUninterruptibly();
future2.channel().close().syncUninterruptibly();
}
@Test(timeout = 10000)
public void testMultipleBindDatagramChannel() throws Exception {
ResourceLeakDetector.setLevel(ResourceLeakDetector.Level.ADVANCED);
Assume.assumeTrue(versionEqOrGt(3, 9, 0));
Bootstrap bootstrap = createBootstrap();
bootstrap.option(EpollChannelOption.SO_REUSEPORT, true);
final AtomicBoolean received1 = new AtomicBoolean();
bootstrap.handler(new DatagramSocketTestHandler(received1));
ChannelFuture future = bootstrap.bind().syncUninterruptibly();
final InetSocketAddress address1 = (InetSocketAddress) future.channel().localAddress();
final AtomicBoolean received2 = new AtomicBoolean();
bootstrap.handler(new DatagramSocketTestHandler(received2));
ChannelFuture future2 = bootstrap.bind().syncUninterruptibly();
final InetSocketAddress address2 = (InetSocketAddress) future2.channel().localAddress();
Assert.assertEquals(address1, address2);
final byte[] bytes = "data".getBytes();
// fire up 16 Threads and send DatagramPackets to make sure we stress it enough to see DatagramPackets received
// on both sockets.
int count = 16;
final CountDownLatch latch = new CountDownLatch(count);
Runnable r = new Runnable() {
@Override
public void run() {
try {
DatagramSocket socket = new DatagramSocket();
while (!received1.get() || !received2.get()) {
socket.send(new DatagramPacket(
bytes, 0, bytes.length, address1.getAddress(), address1.getPort()));
}
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
latch.countDown();
}
};
ExecutorService executor = Executors.newFixedThreadPool(count);
for (int i = 0 ; i < count; i++) {
executor.execute(r);
}
latch.await();
executor.shutdown();
future.channel().close().syncUninterruptibly();
future2.channel().close().syncUninterruptibly();
Assert.assertTrue(received1.get());
Assert.assertTrue(received2.get());
}
private static ServerBootstrap createServerBootstrap() {
ServerBootstrap bootstrap = new ServerBootstrap();
bootstrap.group(EpollSocketTestPermutation.EPOLL_BOSS_GROUP, EpollSocketTestPermutation.EPOLL_WORKER_GROUP);
bootstrap.channel(EpollServerSocketChannel.class);
bootstrap.childHandler(new DummyHandler());
InetSocketAddress address = new InetSocketAddress(NetUtil.LOCALHOST, TestUtils.getFreePort());
bootstrap.localAddress(address);
return bootstrap;
}
private static Bootstrap createBootstrap() {
Bootstrap bootstrap = new Bootstrap();
bootstrap.group(EpollSocketTestPermutation.EPOLL_WORKER_GROUP);
bootstrap.channel(EpollDatagramChannel.class);
InetSocketAddress address = new InetSocketAddress(NetUtil.LOCALHOST, TestUtils.getFreePort());
bootstrap.localAddress(address);
return bootstrap;
}
private static boolean versionEqOrGt(int major, int minor, int bugfix) {
if (MAJOR > major) {
return true;
}
if (MAJOR == major) {
if (MINOR > minor) {
return true;
} else if (MINOR == minor) {
if (BUGFIX >= bugfix) {
return true;
}
}
}
return false;
}
@ChannelHandler.Sharable
private static class ServerSocketTestHandler extends ChannelHandlerAdapter {
private final AtomicBoolean accepted;
ServerSocketTestHandler(AtomicBoolean accepted) {
this.accepted = accepted;
}
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
accepted.set(true);
ctx.close();
}
}
@ChannelHandler.Sharable
private static class DatagramSocketTestHandler extends ChannelHandlerAdapter {
private final AtomicBoolean received;
DatagramSocketTestHandler(AtomicBoolean received) {
this.received = received;
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
ReferenceCountUtil.release(msg);
received.set(true);
}
}
@ChannelHandler.Sharable
private static final class DummyHandler extends ChannelHandlerAdapter { }
}