openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/core/TcpChannelInitializer.java

   1 /*
   2  * Copyright (c) 2013 Pantheon Technologies s.r.o. and others. All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.openflowjava.protocol.impl.core;
  10
  11 import io.netty.channel.Channel;
  12 import io.netty.channel.group.DefaultChannelGroup;
  13 import io.netty.channel.socket.SocketChannel;
  14 import io.netty.handler.ssl.SslHandler;
  15 import io.netty.util.concurrent.Future;
  16 import io.netty.util.concurrent.GenericFutureListener;
  17 import java.net.InetAddress;
  18 import java.util.Iterator;
  19 import java.util.List;
  20 import java.util.concurrent.TimeUnit;
  21 import javax.net.ssl.SSLEngine;
  22 import org.opendaylight.openflowjava.protocol.impl.core.connection.ConnectionAdapterFactory;
  23 import org.opendaylight.openflowjava.protocol.impl.core.connection.ConnectionAdapterFactoryImpl;
  24 import org.opendaylight.openflowjava.protocol.impl.core.connection.ConnectionFacade;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 /**
  29  * Initializes TCP / TLS channel.
  30  * @author michal.polkorab
  31  */
  32 public class TcpChannelInitializer extends ProtocolChannelInitializer<SocketChannel> {
  33
  34     private static final Logger LOG = LoggerFactory.getLogger(TcpChannelInitializer.class);
  35     private final DefaultChannelGroup allChannels;
  36     private final ConnectionAdapterFactory connectionAdapterFactory;
  37
  38     /**
  39      * Default constructor.
  40      */
  41     public TcpChannelInitializer() {
  42         this( new DefaultChannelGroup("netty-receiver", null), new ConnectionAdapterFactoryImpl() );
  43     }
  44
  45     /**
  46      * Testing constructor.
  47      */
  48     protected TcpChannelInitializer( final DefaultChannelGroup channelGroup, final ConnectionAdapterFactory connAdaptorFactory ) {
  49         allChannels = channelGroup ;
  50         connectionAdapterFactory = connAdaptorFactory ;
  51     }
  52
  53     @Override
  54     protected void initChannel(final SocketChannel ch) {
  55         if (ch.remoteAddress() != null) {
  56             final InetAddress switchAddress = ch.remoteAddress().getAddress();
  57             final int port = ch.localAddress().getPort();
  58             final int remotePort = ch.remoteAddress().getPort();
  59             LOG.debug("Incoming connection from (remote address): {}:{} --> :{}",
  60                             switchAddress.toString(), remotePort, port);
  61
  62             if (!getSwitchConnectionHandler().accept(switchAddress)) {
  63                 ch.disconnect();
  64                 LOG.debug("Incoming connection rejected");
  65                 return;
  66             }
  67         }
  68         LOG.debug("Incoming connection accepted - building pipeline");
  69         allChannels.add(ch);
  70         ConnectionFacade connectionFacade = null;
  71         connectionFacade = connectionAdapterFactory.createConnectionFacade(ch, null, useBarrier());
  72         try {
  73             LOG.debug("Calling OF plugin: {}", getSwitchConnectionHandler());
  74             getSwitchConnectionHandler().onSwitchConnected(connectionFacade);
  75             connectionFacade.checkListeners();
  76             ch.pipeline().addLast(PipelineHandlers.IDLE_HANDLER.name(),
  77                     new IdleHandler(getSwitchIdleTimeout(), TimeUnit.MILLISECONDS));
  78             boolean tlsPresent = false;
  79
  80             // If this channel is configured to support SSL it will only support SSL
  81             if (getTlsConfiguration() != null) {
  82                 tlsPresent = true;
  83                 final SslContextFactory sslFactory = new SslContextFactory(getTlsConfiguration());
  84                 final SSLEngine engine = sslFactory.getServerContext().createSSLEngine();
  85                 engine.setNeedClientAuth(true);
  86                 engine.setUseClientMode(false);
  87                 List<String> suitesList = getTlsConfiguration().getCipherSuites();
  88                 if (suitesList != null && !suitesList.isEmpty()) {
  89                     LOG.debug("Requested Cipher Suites are: {}", suitesList);
  90                     String[] suites = suitesList.toArray(new String[suitesList.size()]);
  91                     engine.setEnabledCipherSuites(suites);
  92                     LOG.debug("Cipher suites enabled in SSLEngine are: {}", engine.getEnabledCipherSuites().toString());
  93                 }
  94                 final SslHandler ssl = new SslHandler(engine);
  95                 final Future<Channel> handshakeFuture = ssl.handshakeFuture();
  96                 final ConnectionFacade finalConnectionFacade = connectionFacade;
  97                 handshakeFuture.addListener(new GenericFutureListener<Future<? super Channel>>() {
  98                     @Override
  99                     public void operationComplete(final Future<? super Channel> future) throws Exception {
 100                         finalConnectionFacade.fireConnectionReadyNotification();
 101                     }
 102                 });
 103                 ch.pipeline().addLast(PipelineHandlers.SSL_HANDLER.name(), ssl);
 104             }
 105             ch.pipeline().addLast(PipelineHandlers.OF_FRAME_DECODER.name(),
 106                     new OFFrameDecoder(connectionFacade, tlsPresent));
 107             ch.pipeline().addLast(PipelineHandlers.OF_VERSION_DETECTOR.name(), new OFVersionDetector());
 108             final OFDecoder ofDecoder = new OFDecoder();
 109             ofDecoder.setDeserializationFactory(getDeserializationFactory());
 110             ch.pipeline().addLast(PipelineHandlers.OF_DECODER.name(), ofDecoder);
 111             final OFEncoder ofEncoder = new OFEncoder();
 112             ofEncoder.setSerializationFactory(getSerializationFactory());
 113             ch.pipeline().addLast(PipelineHandlers.OF_ENCODER.name(), ofEncoder);
 114             ch.pipeline().addLast(PipelineHandlers.DELEGATING_INBOUND_HANDLER.name(),
 115                     new DelegatingInboundHandler(connectionFacade));
 116             if (!tlsPresent) {
 117                 connectionFacade.fireConnectionReadyNotification();
 118             }
 119         } catch (final Exception e) {
 120             LOG.warn("Failed to initialize channel", e);
 121             ch.close();
 122         }
 123     }
 124
 125     /**
 126      * @return iterator through active connections
 127      */
 128     public Iterator<Channel> getConnectionIterator() {
 129         return allChannels.iterator();
 130     }
 131
 132     /**
 133      * @return amount of active channels
 134      */
 135     public int size() {
 136         return allChannels.size();
 137     }
 138 }