| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.kerby.kerberos.kdc.impl; |
| |
| import io.netty.bootstrap.Bootstrap; |
| import io.netty.bootstrap.ServerBootstrap; |
| import io.netty.channel.ChannelHandler; |
| import io.netty.channel.ChannelInitializer; |
| import io.netty.channel.ChannelOption; |
| import io.netty.channel.ChannelPipeline; |
| import io.netty.channel.EventLoopGroup; |
| import io.netty.channel.nio.NioEventLoopGroup; |
| import io.netty.channel.socket.SocketChannel; |
| import io.netty.channel.socket.nio.NioDatagramChannel; |
| import io.netty.channel.socket.nio.NioServerSocketChannel; |
| import io.netty.handler.codec.LengthFieldBasedFrameDecoder; |
| import io.netty.handler.logging.LogLevel; |
| import io.netty.handler.logging.LoggingHandler; |
| import io.netty.util.concurrent.DefaultEventExecutorGroup; |
| import org.apache.kerby.kerberos.kerb.KrbException; |
| import org.apache.kerby.kerberos.kerb.server.KdcContext; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| |
| /** |
| * A combined and mixed network server handling UDP and TCP. |
| */ |
| public class NettyKdcNetwork { |
| private KdcContext kdcContext; |
| private InetSocketAddress tcpAddress; |
| private InetSocketAddress udpAddress; |
| private EventLoopGroup bossGroup; |
| private EventLoopGroup workerGroup; |
| private EventLoopGroup group; |
| private DefaultEventExecutorGroup executorGroup; |
| private static final Logger LOG = LoggerFactory.getLogger(NettyKdcNetwork.class); |
| |
| public void init(KdcContext kdcContext) { |
| this.kdcContext = kdcContext; |
| // Configure the server. |
| bossGroup = new NioEventLoopGroup(1); |
| workerGroup = new NioEventLoopGroup(); |
| executorGroup = new DefaultEventExecutorGroup(10); //TODO: to configure. |
| } |
| |
| public void listen(InetSocketAddress tcpAddress, |
| InetSocketAddress udpAddress) throws IOException { |
| this.tcpAddress = tcpAddress; |
| this.udpAddress = udpAddress; |
| } |
| |
| public void start() throws Exception { |
| try { |
| doStart(); |
| } catch (Exception e) { |
| LOG.error("Error occurred while starting the netty kdc network. " + e.toString()); |
| throw new KrbException("Error occurred while starting the netty kdc network. ", e); |
| } |
| } |
| |
| private void doStart() throws Exception { |
| ServerBootstrap b = new ServerBootstrap(); |
| b.group(bossGroup, workerGroup) |
| .channel(NioServerSocketChannel.class) |
| .option(ChannelOption.SO_BACKLOG, 100) |
| .handler(new LoggingHandler(LogLevel.INFO)) |
| .childHandler(createChannelInitializer()); |
| |
| // Start the server. |
| b.bind(tcpAddress.getPort()).sync(); |
| if (udpAddress != null) { |
| startUDPServer(); |
| } |
| } |
| |
| private void startUDPServer() throws InterruptedException { |
| this.group = new NioEventLoopGroup(); |
| Bootstrap b = new Bootstrap(); |
| b.group(group).channel(NioDatagramChannel.class) |
| .option(ChannelOption.SO_BROADCAST, true) |
| .handler((ChannelHandler) new NettyKdcUdpServerHandler(kdcContext)); |
| b.bind(udpAddress.getPort()).sync(); |
| } |
| |
| static class KrbMessageDecoder extends LengthFieldBasedFrameDecoder { |
| KrbMessageDecoder() { |
| super(1 * 1024 * 1024, 0, 4, 0, 4, true); |
| } |
| } |
| |
| private ChannelInitializer<SocketChannel> createChannelInitializer() { |
| return new ChannelInitializer<SocketChannel>() { |
| @Override |
| public void initChannel(SocketChannel ch) throws Exception { |
| ChannelPipeline p = ch.pipeline(); |
| p.addLast(new KrbMessageDecoder()); |
| p.addLast(executorGroup, |
| "KDC_HANDLER", |
| new NettyKdcHandler(kdcContext)); |
| } |
| }; |
| } |
| |
| public synchronized void stop() { |
| // Shut down all event loops to terminate all threads. |
| bossGroup.shutdownGracefully(); |
| workerGroup.shutdownGracefully(); |
| if (udpAddress != null) { |
| group.shutdownGracefully(); |
| } |
| |
| try { |
| bossGroup.terminationFuture().sync(); |
| workerGroup.terminationFuture().sync(); |
| if (udpAddress != null) { |
| group.terminationFuture().sync(); |
| } |
| } catch (InterruptedException e) { |
| LOG.error("Interrupted when sync. " + e); |
| } |
| } |
| } |