content: /*
   * Copyright (C) 2015 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 android.net.netlink.NetlinkConstants;
  import android.net.netlink.StructNlMsgHdr;
  
  import java.nio.ByteBuffer;
  
  
  /**
   * struct nlmsgerr
   *
   * see &lt;linux_src&gt;/include/uapi/linux/netlink.h
   *
   * @hide
   */
  public class StructNlMsgErr {
      public static final int STRUCT_SIZE = Integer.BYTES + StructNlMsgHdr.STRUCT_SIZE;
  
      public static boolean hasAvailableSpace(ByteBuffer byteBuffer) {
          return byteBuffer != null && byteBuffer.remaining() >= STRUCT_SIZE;
      }
  
      public static StructNlMsgErr parse(ByteBuffer byteBuffer) {
          if (!hasAvailableSpace(byteBuffer)) { return null; }
  
          // The ByteOrder must have already been set by the caller.  In most
          // cases ByteOrder.nativeOrder() is correct, with the exception
          // of usage within unittests.
          final StructNlMsgErr struct = new StructNlMsgErr();
          struct.error = byteBuffer.getInt();
          struct.msg = StructNlMsgHdr.parse(byteBuffer);
          return struct;
      }
  
      public int error;
      public StructNlMsgHdr msg;
  
      public void pack(ByteBuffer byteBuffer) {
          // The ByteOrder must have already been set by the caller.  In most
          // cases ByteOrder.nativeOrder() is correct, with the possible
          // exception of usage within unittests.
          byteBuffer.putInt(error);
          if (msg != null) {
              msg.pack(byteBuffer);
          }
      }
  
      @Override
      public String toString() {
          return "StructNlMsgErr{ "
                  + "error{" + error + "}, "
                  + "msg{" + (msg == null ? "" : msg.toString()) + "} "
                  + "}";
      }
  }
  