/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 org.apache.cxf.transport.udp;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.DatagramPacket;
import java.net.InetSocketAddress;
import java.net.InterfaceAddress;
import java.net.MulticastSocket;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.SocketTimeoutException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.logging.Logger;
import org.apache.cxf.Bus;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.helpers.LoadingByteArrayOutputStream;
import org.apache.cxf.message.Exchange;
import org.apache.cxf.message.ExchangeImpl;
import org.apache.cxf.message.Message;
import org.apache.cxf.message.MessageImpl;
import org.apache.cxf.service.model.EndpointInfo;
import org.apache.cxf.transport.AbstractDestination;
import org.apache.cxf.transport.Conduit;
import org.apache.cxf.workqueue.AutomaticWorkQueue;
import org.apache.cxf.workqueue.WorkQueueManager;
import org.apache.cxf.ws.addressing.EndpointReferenceType;
import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.core.session.AttributeKey;
import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.handler.stream.StreamIoHandler;
import org.apache.mina.transport.socket.DatagramSessionConfig;
import org.apache.mina.transport.socket.nio.NioDatagramAcceptor;
/**
*
*/
public class UDPDestination extends AbstractDestination {
public static final String NETWORK_INTERFACE = UDPDestination.class.getName() + ".NETWORK_INTERFACE";
private static final Logger LOG = LogUtils.getL7dLogger(UDPDestination.class);
private static final AttributeKey KEY_IN = new AttributeKey(StreamIoHandler.class, "in");
private static final AttributeKey KEY_OUT = new AttributeKey(StreamIoHandler.class, "out");
NioDatagramAcceptor acceptor;
AutomaticWorkQueue queue;
volatile MulticastSocket mcast;
public UDPDestination(Bus b, EndpointReferenceType ref, EndpointInfo ei) {
super(b, ref, ei);
}
class MCastListener implements Runnable {
public void run() {
while (true) {
if (mcast == null) {
return;
}
try {
byte bytes[] = new byte[64 * 1024];
final DatagramPacket p = new DatagramPacket(bytes, bytes.length);
mcast.receive(p);
LoadingByteArrayOutputStream out = new LoadingByteArrayOutputStream() {
public void close() throws IOException {
super.close();
final DatagramPacket p2 = new DatagramPacket(getRawBytes(),
0,
this.size(),
p.getSocketAddress());
mcast.send(p2);
}
};
UDPConnectionInfo info = new UDPConnectionInfo(null,
out,
new ByteArrayInputStream(bytes, 0, p.getLength()));
final MessageImpl m = new MessageImpl();
final Exchange exchange = new ExchangeImpl();
exchange.setDestination(UDPDestination.this);
m.setDestination(UDPDestination.this);
exchange.setInMessage(m);
m.setContent(InputStream.class, info.in);
m.put(UDPConnectionInfo.class, info);
queue.execute(new Runnable() {
public void run() {
getMessageObserver().onMessage(m);
}
});
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
}
/** {@inheritDoc}*/
@Override
protected Conduit getInbuiltBackChannel(Message inMessage) {
if (inMessage.getExchange().isOneWay()) {
return null;
}
final UDPConnectionInfo info = inMessage.get(UDPConnectionInfo.class);
return new AbstractBackChannelConduit() {
public void prepare(Message message) throws IOException {
message.setContent(OutputStream.class, info.out);
}
};
}
/** {@inheritDoc}*/
@Override
protected Logger getLogger() {
return LOG;
}
protected void activate() {
WorkQueueManager queuem = bus.getExtension(WorkQueueManager.class);
queue = queuem.getNamedWorkQueue("udp-transport");
if (queue == null) {
queue = queuem.getAutomaticWorkQueue();
}
try {
URI uri = new URI(this.getAddress().getAddress().getValue());
InetSocketAddress isa = null;
if (StringUtils.isEmpty(uri.getHost())) {
String s = uri.getSchemeSpecificPart();
if (s.startsWith("//:")) {
s = s.substring(3);
}
if (s.indexOf('/') != -1) {
s = s.substring(0, s.indexOf('/'));
}
int port = Integer.parseInt(s);
isa = new InetSocketAddress(port);
} else {
isa = new InetSocketAddress(uri.getHost(), uri.getPort());
}
if (isa.getAddress().isMulticastAddress()) {
//ouch...
MulticastSocket socket = new MulticastSocket(null);
socket.setReuseAddress(true);
socket.setReceiveBufferSize(64 * 1024);
socket.setSendBufferSize(64 * 1024);
socket.setTimeToLive(1);
socket.setLoopbackMode(false);
socket.bind(new InetSocketAddress(isa.getPort()));
socket.setNetworkInterface(findNetworkInterface());
socket.joinGroup(isa.getAddress());
mcast = socket;
queue.execute(new MCastListener());
} else {
acceptor = new NioDatagramAcceptor();
acceptor.setHandler(new UDPIOHandler());
acceptor.setDefaultLocalAddress(isa);
DatagramSessionConfig dcfg = acceptor.getSessionConfig();
dcfg.setReadBufferSize(64 * 1024);
dcfg.setSendBufferSize(64 * 1024);
dcfg.setReuseAddress(true);
acceptor.bind();
}
} catch (Exception ex) {
ex.printStackTrace();
throw new RuntimeException(ex);
}
}
private NetworkInterface findNetworkInterface() throws SocketException {
String name = (String)this.getEndpointInfo().getProperty(UDPDestination.NETWORK_INTERFACE);
NetworkInterface ret = null;
if (!StringUtils.isEmpty(name)) {
ret = NetworkInterface.getByName(name);
}
if (ret == null) {
Enumeration<NetworkInterface> ifcs = NetworkInterface.getNetworkInterfaces();
List<NetworkInterface> possibles = new ArrayList<>();
while (ifcs.hasMoreElements()) {
NetworkInterface ni = ifcs.nextElement();
if (ni.supportsMulticast()
&& ni.isUp()) {
for (InterfaceAddress ia : ni.getInterfaceAddresses()) {
if (ia.getAddress() instanceof java.net.Inet4Address
&& !ia.getAddress().isLoopbackAddress()
&& !ni.getDisplayName().startsWith("vnic")) {
possibles.add(ni);
}
}
}
}
ret = possibles.isEmpty() ? null : possibles.get(possibles.size() - 1);
}
return ret;
}
protected void deactivate() {
if (acceptor != null) {
acceptor.unbind();
acceptor.dispose();
}
acceptor = null;
if (mcast != null) {
mcast.close();
mcast = null;
}
}
static class UDPConnectionInfo {
final IoSession session;
final OutputStream out;
final InputStream in;
UDPConnectionInfo(IoSession io, OutputStream o, InputStream i) {
session = io;
out = o;
in = i;
}
}
class UDPIOHandler extends StreamIoHandler {
@Override
public void sessionOpened(IoSession session) {
// Set timeouts
session.getConfig().setWriteTimeout(getWriteTimeout());
session.getConfig().setIdleTime(IdleStatus.READER_IDLE, getReadTimeout());
// Create streams
InputStream in = new IoSessionInputStream();
OutputStream out = new IoSessionOutputStream(session);
session.setAttribute(KEY_IN, in);
session.setAttribute(KEY_OUT, out);
processStreamIo(session, in, out);
}
protected void processStreamIo(IoSession session, InputStream in, OutputStream out) {
final MessageImpl m = new MessageImpl();
final Exchange exchange = new ExchangeImpl();
exchange.setDestination(UDPDestination.this);
m.setDestination(UDPDestination.this);
exchange.setInMessage(m);
m.setContent(InputStream.class, in);
out = new UDPDestinationOutputStream(out);
m.put(UDPConnectionInfo.class, new UDPConnectionInfo(session, out, in));
queue.execute(new Runnable() {
public void run() {
getMessageObserver().onMessage(m);
}
});
}
public void sessionClosed(IoSession session) throws Exception {
final InputStream in = (InputStream) session.getAttribute(KEY_IN);
final OutputStream out = (OutputStream) session.getAttribute(KEY_OUT);
try {
in.close();
} finally {
out.close();
}
}
public void messageReceived(IoSession session, Object buf) {
final IoSessionInputStream in = (IoSessionInputStream) session
.getAttribute(KEY_IN);
in.setBuffer((IoBuffer) buf);
}
public void exceptionCaught(IoSession session, Throwable cause) {
final IoSessionInputStream in = (IoSessionInputStream) session
.getAttribute(KEY_IN);
IOException e = null;
if (cause instanceof StreamIoException) {
e = (IOException) cause.getCause();
} else if (cause instanceof IOException) {
e = (IOException) cause;
}
if (e != null && in != null) {
in.throwException(e);
} else {
session.closeOnFlush().awaitUninterruptibly();
}
}
public void sessionIdle(IoSession session, IdleStatus status) {
if (status == IdleStatus.READER_IDLE) {
throw new StreamIoException(new SocketTimeoutException(
"Read timeout"));
}
}
}
private static class StreamIoException extends RuntimeException {
private static final long serialVersionUID = 3976736960742503222L;
StreamIoException(IOException cause) {
super(cause);
}
}
public class UDPDestinationOutputStream extends OutputStream {
final OutputStream out;
IoBuffer buffer = IoBuffer.allocate(64 * 1024 - 42); //max size
boolean closed;
public UDPDestinationOutputStream(OutputStream out) {
this.out = out;
}
public void write(int b) throws IOException {
buffer.put(new byte[] {(byte)b}, 0, 1);
}
public void write(byte b[], int off, int len) throws IOException {
while (len > buffer.remaining()) {
int nlen = buffer.remaining();
buffer.put(b, off, nlen);
len -= nlen;
off += nlen;
send();
buffer = IoBuffer.allocate((64 * 1024) - 42);
}
buffer.put(b, off, len);
}
private void send() throws IOException {
buffer.flip();
out.write(buffer.array(), 0, buffer.limit());
}
public void close() throws IOException {
if (closed) {
return;
}
closed = true;
send();
out.close();
}
}
}