opendaylight/netconf/netconf-client/src/main/java/org/opendaylight/controller/netconf/client/NetconfSshClientDispatcher.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. 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.controller.netconf.client;
  10
  11 import java.io.IOException;
  12 import java.net.InetSocketAddress;
  13
  14 import javax.net.ssl.SSLContext;
  15
  16 import org.opendaylight.controller.netconf.api.NetconfMessage;
  17 import org.opendaylight.controller.netconf.api.NetconfSession;
  18 import org.opendaylight.controller.netconf.api.NetconfTerminationReason;
  19 import org.opendaylight.controller.netconf.util.AbstractChannelInitializer;
  20 import org.opendaylight.controller.netconf.util.handler.FramingMechanismHandlerFactory;
  21 import org.opendaylight.controller.netconf.util.handler.NetconfMessageAggregator;
  22 import org.opendaylight.controller.netconf.util.handler.ssh.SshHandler;
  23 import org.opendaylight.controller.netconf.util.handler.ssh.authentication.AuthenticationHandler;
  24 import org.opendaylight.controller.netconf.util.handler.ssh.client.Invoker;
  25 import org.opendaylight.controller.netconf.util.messages.FramingMechanism;
  26 import org.opendaylight.controller.netconf.util.messages.NetconfMessageFactory;
  27 import org.opendaylight.protocol.framework.ProtocolHandlerFactory;
  28 import org.opendaylight.protocol.framework.ProtocolMessageDecoder;
  29 import org.opendaylight.protocol.framework.ProtocolMessageEncoder;
  30 import org.opendaylight.protocol.framework.ReconnectStrategy;
  31 import org.opendaylight.protocol.framework.SessionListener;
  32 import org.opendaylight.protocol.framework.SessionListenerFactory;
  33
  34 import com.google.common.base.Optional;
  35
  36 import io.netty.channel.ChannelHandler;
  37 import io.netty.channel.EventLoopGroup;
  38 import io.netty.channel.socket.SocketChannel;
  39 import io.netty.util.HashedWheelTimer;
  40 import io.netty.util.concurrent.Future;
  41 import io.netty.util.concurrent.Promise;
  42
  43 public class NetconfSshClientDispatcher extends NetconfClientDispatcher {
  44
  45     private AuthenticationHandler authHandler;
  46     private HashedWheelTimer timer;
  47     private NetconfClientSessionNegotiatorFactory negotatorFactory;
  48
  49     public NetconfSshClientDispatcher(AuthenticationHandler authHandler, EventLoopGroup bossGroup,
  50             EventLoopGroup workerGroup) {
  51         super(Optional.<SSLContext> absent(), bossGroup, workerGroup);
  52         this.authHandler = authHandler;
  53         this.timer = new HashedWheelTimer();
  54         this.negotatorFactory = new NetconfClientSessionNegotiatorFactory(timer);
  55     }
  56
  57     @Override
  58     public Future<NetconfClientSession> createClient(InetSocketAddress address,
  59             final NetconfClientSessionListener sessionListener, ReconnectStrategy strat) {
  60         return super.createClient(address, strat, new PipelineInitializer<NetconfClientSession>() {
  61
  62             @Override
  63             public void initializeChannel(SocketChannel arg0, Promise<NetconfClientSession> arg1) {
  64                 new NetconfSshClientInitializer(authHandler, negotatorFactory, sessionListener).initialize(arg0, arg1);
  65             }
  66
  67         });
  68     }
  69
  70     private static final class NetconfSshClientInitializer extends AbstractChannelInitializer {
  71
  72         private final NetconfHandlerFactory handlerFactory;
  73         private final AuthenticationHandler authenticationHandler;
  74         private final NetconfClientSessionNegotiatorFactory negotiatorFactory;
  75         private final NetconfClientSessionListener sessionListener;
  76
  77         public NetconfSshClientInitializer(AuthenticationHandler authHandler,
  78                 NetconfClientSessionNegotiatorFactory negotiatorFactory,
  79                 final NetconfClientSessionListener sessionListener) {
  80             this.handlerFactory = new NetconfHandlerFactory(new NetconfMessageFactory());
  81             this.authenticationHandler = authHandler;
  82             this.negotiatorFactory = negotiatorFactory;
  83             this.sessionListener = sessionListener;
  84         }
  85
  86         @Override
  87         public void initialize(SocketChannel ch, Promise<? extends NetconfSession> promise) {
  88             try {
  89                 Invoker invoker = Invoker.subsystem("netconf");
  90                 ch.pipeline().addFirst(new SshHandler(authenticationHandler, invoker));
  91                 ch.pipeline().addLast("aggregator", new NetconfMessageAggregator(FramingMechanism.EOM));
  92                 ch.pipeline().addLast(handlerFactory.getDecoders());
  93                 initializeAfterDecoder(ch, promise);
  94                 ch.pipeline().addLast("frameEncoder",
  95                         FramingMechanismHandlerFactory.createHandler(FramingMechanism.EOM));
  96                 ch.pipeline().addLast(handlerFactory.getEncoders());
  97             } catch (IOException e) {
  98                 throw new RuntimeException(e);
  99             }
 100         }
 101
 102         @Override
 103         protected void initializeAfterDecoder(SocketChannel ch, Promise<? extends NetconfSession> promise) {
 104             ch.pipeline().addLast("negotiator", negotiatorFactory.getSessionNegotiator(new SessionListenerFactory() {
 105                 @Override
 106                 public SessionListener<NetconfMessage, NetconfClientSession, NetconfTerminationReason> getSessionListener() {
 107                     return sessionListener;
 108                 }
 109             }, ch, promise));
 110
 111         }
 112     }
 113
 114     private static final class NetconfHandlerFactory extends ProtocolHandlerFactory<NetconfMessage> {
 115
 116         public NetconfHandlerFactory(final NetconfMessageFactory msgFactory) {
 117             super(msgFactory);
 118         }
 119
 120         @Override
 121         public ChannelHandler[] getEncoders() {
 122             return new ChannelHandler[] { new ProtocolMessageEncoder(this.msgFactory) };
 123         }
 124
 125         @Override
 126         public ChannelHandler[] getDecoders() {
 127             return new ChannelHandler[] { new ProtocolMessageDecoder(this.msgFactory) };
 128         }
 129     }
 130 }