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 io.netty.channel.ChannelHandler;
  12 import io.netty.channel.EventLoopGroup;
  13 import io.netty.channel.socket.SocketChannel;
  14 import io.netty.util.HashedWheelTimer;
  15 import io.netty.util.concurrent.Future;
  16 import io.netty.util.concurrent.Promise;
  17 import java.io.IOException;
  18 import java.net.InetSocketAddress;
  19 import org.opendaylight.controller.netconf.api.NetconfMessage;
  20 import org.opendaylight.controller.netconf.api.NetconfSession;
  21 import org.opendaylight.controller.netconf.api.NetconfTerminationReason;
  22 import org.opendaylight.controller.netconf.util.AbstractChannelInitializer;
  23 import org.opendaylight.controller.netconf.util.handler.ssh.SshHandler;
  24 import org.opendaylight.controller.netconf.util.handler.ssh.authentication.AuthenticationHandler;
  25 import org.opendaylight.controller.netconf.util.handler.ssh.client.Invoker;
  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 public class NetconfSshClientDispatcher extends NetconfClientDispatcher {
  35
  36     private AuthenticationHandler authHandler;
  37     private HashedWheelTimer timer;
  38     private NetconfClientSessionNegotiatorFactory negotatorFactory;
  39
  40     public NetconfSshClientDispatcher(AuthenticationHandler authHandler, EventLoopGroup bossGroup,
  41             EventLoopGroup workerGroup) {
  42         super(bossGroup, workerGroup);
  43         this.authHandler = authHandler;
  44         this.timer = new HashedWheelTimer();
  45         this.negotatorFactory = new NetconfClientSessionNegotiatorFactory(timer);
  46     }
  47
  48     public Future<NetconfClientSession> createClient(InetSocketAddress address,
  49             final NetconfClientSessionListener sessionListener, ReconnectStrategy strat) {
  50         return super.createClient(address, strat, new PipelineInitializer<NetconfClientSession>() {
  51
  52             @Override
  53             public void initializeChannel(SocketChannel arg0, Promise<NetconfClientSession> arg1) {
  54                 new NetconfSshClientInitializer(authHandler, negotatorFactory, sessionListener).initialize(arg0, arg1);
  55             }
  56
  57         });
  58     }
  59
  60     private static final class NetconfSshClientInitializer extends AbstractChannelInitializer {
  61
  62         private final NetconfHandlerFactory handlerFactory;
  63         private final AuthenticationHandler authenticationHandler;
  64         private final NetconfClientSessionNegotiatorFactory negotiatorFactory;
  65         private final NetconfClientSessionListener sessionListener;
  66
  67         public NetconfSshClientInitializer(AuthenticationHandler authHandler,
  68                 NetconfClientSessionNegotiatorFactory negotiatorFactory,
  69                 final NetconfClientSessionListener sessionListener) {
  70             this.handlerFactory = new NetconfHandlerFactory(new NetconfMessageFactory());
  71             this.authenticationHandler = authHandler;
  72             this.negotiatorFactory = negotiatorFactory;
  73             this.sessionListener = sessionListener;
  74         }
  75
  76         @Override
  77         public void initialize(SocketChannel ch, Promise<? extends NetconfSession> promise) {
  78             try {
  79                 Invoker invoker = Invoker.subsystem("netconf");
  80                 ch.pipeline().addFirst(new SshHandler(authenticationHandler, invoker));
  81                 super.initialize(ch,promise);
  82             } catch (IOException e) {
  83                 throw new RuntimeException(e);
  84             }
  85         }
  86
  87         @Override
  88         protected void initializeAfterDecoder(SocketChannel ch, Promise<? extends NetconfSession> promise) {
  89             ch.pipeline().addLast("negotiator", negotiatorFactory.getSessionNegotiator(new SessionListenerFactory() {
  90                 @Override
  91                 public SessionListener<NetconfMessage, NetconfClientSession, NetconfTerminationReason> getSessionListener() {
  92                     return sessionListener;
  93                 }
  94             }, ch, promise));
  95
  96         }
  97     }
  98
  99     private static final class NetconfHandlerFactory extends ProtocolHandlerFactory<NetconfMessage> {
 100
 101         public NetconfHandlerFactory(final NetconfMessageFactory msgFactory) {
 102             super(msgFactory);
 103         }
 104
 105         @Override
 106         public ChannelHandler[] getEncoders() {
 107             return new ChannelHandler[] { new ProtocolMessageEncoder(this.msgFactory) };
 108         }
 109
 110         @Override
 111         public ChannelHandler[] getDecoders() {
 112             return new ChannelHandler[] { new ProtocolMessageDecoder(this.msgFactory) };
 113         }
 114     }
 115 }