/*
    * 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.channel.unix;
  
  import java.net.Inet6Address;
  import java.net.InetAddress;
  import java.net.InetSocketAddress;
  import java.net.UnknownHostException;
  
  /**
   * Act as special {@link InetSocketAddress} to be able to easily pass all needed data from JNI without the need
   * to create more objects then needed.
   * <p>
   * <strong>Internal usage only!</strong>
   */
  public final class DatagramSocketAddress extends InetSocketAddress {
      private static final long serialVersionUID = 3094819287843178401L;
  
      // holds the amount of received bytes
      private final int receivedAmount;
      private final DatagramSocketAddress localAddress;
  
      DatagramSocketAddress(byte[] addr, int scopeId, int port, int receivedAmount, DatagramSocketAddress local)
              throws UnknownHostException {
          super(newAddress(addr, scopeId), port);
          this.receivedAmount = receivedAmount;
          localAddress = local;
      }
  
      public DatagramSocketAddress localAddress() {
          return localAddress;
      }
  
      public int receivedAmount() {
          return receivedAmount;
      }
  
      private static InetAddress newAddress(byte[] bytes, int scopeId) throws UnknownHostException {
          if (bytes.length == 4) {
              return InetAddress.getByAddress(bytes);
          }
          return Inet6Address.getByAddress(null, bytes, scopeId);
      }
  }