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 com.google.common.base.Optional;
  12 import io.netty.channel.ChannelHandler;
  13 import io.netty.channel.EventLoopGroup;
  14 import io.netty.channel.socket.SocketChannel;
  15 import io.netty.util.HashedWheelTimer;
  16 import io.netty.util.concurrent.Future;
  17 import io.netty.util.concurrent.Promise;
  18 import org.opendaylight.controller.netconf.api.NetconfMessage;
  19 import org.opendaylight.controller.netconf.api.NetconfSession;
  20 import org.opendaylight.controller.netconf.api.NetconfTerminationReason;
  21 import org.opendaylight.controller.netconf.util.AbstractChannelInitializer;
  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.NetconfMessageFactory;
  26 import org.opendaylight.protocol.framework.ProtocolHandlerFactory;
  27 import org.opendaylight.protocol.framework.ProtocolMessageDecoder;
  28 import org.opendaylight.protocol.framework.ProtocolMessageEncoder;
  29 import org.opendaylight.protocol.framework.ReconnectStrategy;
  30 import org.opendaylight.protocol.framework.SessionListener;
  31 import org.opendaylight.protocol.framework.SessionListenerFactory;
  32
  33 import java.io.IOException;
  34 import java.net.InetSocketAddress;
  35
  36 public class NetconfSshClientDispatcher extends NetconfClientDispatcher {
  37
  38     private AuthenticationHandler authHandler;
  39     private HashedWheelTimer timer;
  40     private NetconfClientSessionNegotiatorFactory negotatorFactory;
  41
  42     public NetconfSshClientDispatcher(AuthenticationHandler authHandler, EventLoopGroup bossGroup,
  43             EventLoopGroup workerGroup, long connectionTimeoutMillis) {
  44         super(bossGroup, workerGroup, connectionTimeoutMillis);
  45         this.authHandler = authHandler;
  46         this.timer = new HashedWheelTimer();
  47         this.negotatorFactory = new NetconfClientSessionNegotiatorFactory(timer, Optional.<String>absent(), connectionTimeoutMillis);
  48     }
  49
  50     public NetconfSshClientDispatcher(AuthenticationHandler authHandler, EventLoopGroup bossGroup,
  51             EventLoopGroup workerGroup, String additionalHeader, long socketTimeoutMillis) {
  52         super(bossGroup, workerGroup, additionalHeader, socketTimeoutMillis);
  53         this.authHandler = authHandler;
  54         this.timer = new HashedWheelTimer();
  55         this.negotatorFactory = new NetconfClientSessionNegotiatorFactory(timer, Optional.of(additionalHeader), socketTimeoutMillis);
  56     }
  57
  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                 super.initialize(ch,promise);
  92             } catch (IOException e) {
  93                 throw new RuntimeException(e);
  94             }
  95         }
  96
  97         @Override
  98         protected void initializeAfterDecoder(SocketChannel ch, Promise<? extends NetconfSession> promise) {
  99             ch.pipeline().addLast("negotiator", negotiatorFactory.getSessionNegotiator(new SessionListenerFactory() {
 100                 @Override
 101                 public SessionListener<NetconfMessage, NetconfClientSession, NetconfTerminationReason> getSessionListener() {
 102                     return sessionListener;
 103                 }
 104             }, ch, promise));
 105
 106         }
 107     }
 108
 109     private static final class NetconfHandlerFactory extends ProtocolHandlerFactory<NetconfMessage> {
 110
 111         public NetconfHandlerFactory(final NetconfMessageFactory msgFactory) {
 112             super(msgFactory);
 113         }
 114
 115         @Override
 116         public ChannelHandler[] getEncoders() {
 117             return new ChannelHandler[] { new ProtocolMessageEncoder(this.msgFactory) };
 118         }
 119
 120         @Override
 121         public ChannelHandler[] getDecoders() {
 122             return new ChannelHandler[] { new ProtocolMessageDecoder(this.msgFactory) };
 123         }
 124     }
 125 }