netconf/mdsal-netconf-ssh/src/test/java/org/opendaylight/netconf/netty/ProxyServerHandler.java

   1 /*
   2  * Copyright (c) 2014 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.netconf.netty;
  10
  11 import io.netty.bootstrap.Bootstrap;
  12 import io.netty.buffer.Unpooled;
  13 import io.netty.channel.Channel;
  14 import io.netty.channel.ChannelFuture;
  15 import io.netty.channel.ChannelHandlerContext;
  16 import io.netty.channel.ChannelInboundHandlerAdapter;
  17 import io.netty.channel.ChannelInitializer;
  18 import io.netty.channel.EventLoopGroup;
  19 import io.netty.channel.local.LocalAddress;
  20 import io.netty.channel.local.LocalChannel;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 public class ProxyServerHandler extends ChannelInboundHandlerAdapter {
  25     private static final Logger LOG = LoggerFactory.getLogger(ProxyServerHandler.class);
  26     private final Bootstrap clientBootstrap;
  27     private final LocalAddress localAddress;
  28
  29
  30     private Channel clientChannel;
  31
  32     public ProxyServerHandler(EventLoopGroup bossGroup, LocalAddress localAddress) {
  33         clientBootstrap = new Bootstrap();
  34         clientBootstrap.group(bossGroup).channel(LocalChannel.class);
  35         this.localAddress = localAddress;
  36     }
  37
  38     @Override
  39     public void channelActive(ChannelHandlerContext remoteCtx) {
  40         final ProxyClientHandler clientHandler = new ProxyClientHandler(remoteCtx);
  41         clientBootstrap.handler(new ChannelInitializer<LocalChannel>() {
  42             @Override
  43             public void initChannel(LocalChannel ch) throws Exception {
  44                 ch.pipeline().addLast(clientHandler);
  45             }
  46         });
  47         ChannelFuture clientChannelFuture = clientBootstrap.connect(localAddress).awaitUninterruptibly();
  48         clientChannel = clientChannelFuture.channel();
  49         clientChannel.writeAndFlush(Unpooled.copiedBuffer("connected\n".getBytes()));
  50     }
  51
  52     @Override
  53     public void channelInactive(ChannelHandlerContext ctx) {
  54         LOG.info("channelInactive - closing client connection");
  55         clientChannel.close();
  56     }
  57
  58     @Override
  59     public void channelRead(ChannelHandlerContext ctx, final Object msg) {
  60         LOG.debug("Writing to client {}", msg);
  61         clientChannel.write(msg);
  62     }
  63
  64     @Override
  65     public void channelReadComplete(ChannelHandlerContext ctx) {
  66         LOG.debug("flushing");
  67         clientChannel.flush();
  68     }
  69
  70     @Override
  71     public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
  72         // Close the connection when an exception is raised.
  73         LOG.warn("Unexpected exception from downstream.", cause);
  74         ctx.close();
  75     }
  76 }
  77