content: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * Licensed 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 android.net.netlink;
  
  import static java.nio.ByteOrder.BIG_ENDIAN;
  
  import java.net.Inet4Address;
  import java.net.InetSocketAddress;
  import java.nio.ByteBuffer;
  import java.nio.ByteOrder;
  
  /**
   * struct inet_diag_req_v2
   *
   * see &lt;linux_src&gt;/include/uapi/linux/inet_diag.h
   *
   * struct inet_diag_sockid {
   *        __be16    idiag_sport;
   *        __be16    idiag_dport;
   *        __be32    idiag_src[4];
   *        __be32    idiag_dst[4];
   *        __u32     idiag_if;
   *        __u32     idiag_cookie[2];
   * #define INET_DIAG_NOCOOKIE (~0U)
   * };
   *
   * @hide
   */
  public class StructInetDiagSockId {
      public static final int STRUCT_SIZE = 48;
  
      private final InetSocketAddress mLocSocketAddress;
      private final InetSocketAddress mRemSocketAddress;
      private final byte[] INET_DIAG_NOCOOKIE = new byte[]{
              (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
              (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff};
      private final byte[] IPV4_PADDING = new byte[] {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  
      public StructInetDiagSockId(InetSocketAddress loc, InetSocketAddress rem) {
          mLocSocketAddress = loc;
          mRemSocketAddress = rem;
      }
  
      public void pack(ByteBuffer byteBuffer) {
          byteBuffer.order(BIG_ENDIAN);
          byteBuffer.putShort((short) mLocSocketAddress.getPort());
          byteBuffer.putShort((short) mRemSocketAddress.getPort());
          byteBuffer.put(mLocSocketAddress.getAddress().getAddress());
          if (mLocSocketAddress.getAddress() instanceof Inet4Address) {
              byteBuffer.put(IPV4_PADDING);
          }
          byteBuffer.put(mRemSocketAddress.getAddress().getAddress());
          if (mRemSocketAddress.getAddress() instanceof Inet4Address) {
              byteBuffer.put(IPV4_PADDING);
          }
          byteBuffer.order(ByteOrder.nativeOrder());
          byteBuffer.putInt(0);
          byteBuffer.put(INET_DIAG_NOCOOKIE);
      }
  
      @Override
      public String toString() {
          return "StructInetDiagSockId{ "
                  + "idiag_sport{" + mLocSocketAddress.getPort() + "}, "
                  + "idiag_dport{" + mRemSocketAddress.getPort() + "}, "
                  + "idiag_src{" + mLocSocketAddress.getAddress().getHostAddress() + "}, "
                  + "idiag_dst{" + mRemSocketAddress.getAddress().getHostAddress() + "}, "
                  + "idiag_if{" + 0 + "} "
                  + "idiag_cookie{INET_DIAG_NOCOOKIE}"
                  + "}";
      }
  }
  