/*
    * Copyright 2015 The Netty Project
    *
    * The Netty Project 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:
    *
    *   https://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 io.netty.example.sctp.multihoming;
  
  import io.netty.bootstrap.ServerBootstrap;
  import io.netty.channel.ChannelFuture;
  import io.netty.channel.ChannelInitializer;
  import io.netty.channel.ChannelOption;
  import io.netty.channel.EventLoopGroup;
  import io.netty.channel.nio.NioEventLoopGroup;
  import io.netty.channel.sctp.SctpChannel;
  import io.netty.channel.sctp.SctpServerChannel;
  import io.netty.channel.sctp.nio.NioSctpServerChannel;
  import io.netty.example.sctp.SctpEchoServerHandler;
  import io.netty.handler.logging.LogLevel;
  import io.netty.handler.logging.LoggingHandler;
  import io.netty.util.internal.SocketUtils;
  
  import java.net.InetAddress;
  import java.net.InetSocketAddress;
  
  /**
   * SCTP Echo Server with multi-homing support.
   */
  public final class SctpMultiHomingEchoServer {
  
      private static final String SERVER_PRIMARY_HOST = System.getProperty("host.primary", "127.0.0.1");
      private static final String SERVER_SECONDARY_HOST = System.getProperty("host.secondary", "127.0.0.2");
  
      private static final int SERVER_PORT = Integer.parseInt(System.getProperty("port", "8007"));
  
      public static void main(String[] args) throws Exception {
          // Configure the server.
          EventLoopGroup group = new NioEventLoopGroup();
          try {
              ServerBootstrap b = new ServerBootstrap();
              b.group(group)
               .channel(NioSctpServerChannel.class)
               .option(ChannelOption.SO_BACKLOG, 100)
               .handler(new LoggingHandler(LogLevel.INFO))
               .childHandler(new ChannelInitializer<SctpChannel>() {
                   @Override
                   public void initChannel(SctpChannel ch) throws Exception {
                       ch.pipeline().addLast(
  //                             new LoggingHandler(LogLevel.INFO),
                               new SctpEchoServerHandler());
                   }
               });
  
              InetSocketAddress localAddress = SocketUtils.socketAddress(SERVER_PRIMARY_HOST, SERVER_PORT);
              InetAddress localSecondaryAddress = SocketUtils.addressByName(SERVER_SECONDARY_HOST);
  
              // Bind the server to primary address.
              ChannelFuture bindFuture = b.bind(localAddress).sync();
  
              //Get the underlying sctp channel
              SctpServerChannel channel = (SctpServerChannel) bindFuture.channel();
  
              //Bind the secondary address
              ChannelFuture connectFuture = channel.bindAddress(localSecondaryAddress).sync();
  
              // Wait until the connection is closed.
              connectFuture.channel().closeFuture().sync();
          } finally {
              // Shut down all event loops to terminate all threads.
              group.shutdownGracefully();
          }
      }
  }